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| -rw-r--r-- | .gitignore | 34 | ||||
| -rw-r--r-- | AUTHORS | 1 | ||||
| -rw-r--r-- | Doxyfile | 2426 | ||||
| -rw-r--r-- | LICENSE | 21 | ||||
| -rw-r--r-- | Makefile.am | 5 | ||||
| -rw-r--r-- | README | 109 | ||||
| -rwxr-xr-x | autogen.sh | 3 | ||||
| -rw-r--r-- | configure.ac | 23 | ||||
| -rw-r--r-- | examples/.gitignore | 1 | ||||
| -rw-r--r-- | examples/Makefile.am | 11 | ||||
| -rw-r--r-- | examples/sandbox.c | 33 | ||||
| -rw-r--r-- | include/config.h | 46 | ||||
| -rw-r--r-- | include/ice.h | 129 | ||||
| -rw-r--r-- | include/peerconn.h | 140 | ||||
| -rw-r--r-- | include/runloop.h | 111 | ||||
| -rw-r--r-- | include/str.h | 34 | ||||
| -rw-r--r-- | include/stun.h | 134 | ||||
| -rw-r--r-- | include/urtc.h | 34 | ||||
| -rw-r--r-- | include/urtc/opts.h | 22 | ||||
| -rw-r--r-- | m4/.gitignore | 5 | ||||
| -rw-r--r-- | m4/ax_pthread.m4 | 507 | ||||
| -rw-r--r-- | src/Makefile.am | 9 | ||||
| -rw-r--r-- | src/err.h | 58 | ||||
| -rw-r--r-- | src/g711.c | 40 | ||||
| -rw-r--r-- | src/g711.h | 68 | ||||
| -rw-r--r-- | src/g711_tables.c | 745 | ||||
| -rw-r--r-- | src/log.h | 83 | ||||
| -rw-r--r-- | src/mdns.c | 607 | ||||
| -rw-r--r-- | src/mdns.h | 43 | ||||
| -rw-r--r-- | src/prng.c | 47 | ||||
| -rw-r--r-- | src/prng.h | 31 | ||||
| -rw-r--r-- | src/sdp.c | 699 | ||||
| -rw-r--r-- | src/sdp.h | 150 | ||||
| -rw-r--r-- | src/urtc.c | 441 | ||||
| -rw-r--r-- | src/urtc.h | 223 | ||||
| -rw-r--r-- | src/uuid.c | 76 | ||||
| -rw-r--r-- | src/uuid.h | 54 | ||||
| -rw-r--r-- | tests/Makefile.am | 32 | ||||
| -rw-r--r-- | tests/g711_test.c | 53 | ||||
| -rw-r--r-- | tests/mdns_test.c | 66 | ||||
| -rw-r--r-- | tests/sdp_test.c | 328 | ||||
| -rw-r--r-- | tests/str_test.c | 31 | ||||
| -rw-r--r-- | tests/uuid_test.c | 45 |
43 files changed, 7758 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c16e3b2 --- /dev/null +++ b/.gitignore @@ -0,0 +1,34 @@ +.deps/ +.libs/ +autom4te.cache/ +doxygen/ +*.dirstamp +*.la +*.lo +*.o +*.swp +Makefile +Makefile.in +aclocal.m4 +ar-lib +compile +config.guess +config.h.in +config.h.in~ +config.h +config.log +config.status +config.sub +configure +depcomp +install-sh +libtool +ltmain.sh +missing +stamp-h1 + +tests/*_test +tests/*.trs +tests/*.log +test-driver +test-suite.log @@ -0,0 +1 @@ +liburtc is written and maintained by Chris Hiszpanski <chris@hiszpanski.name>. diff --git a/Doxyfile b/Doxyfile new file mode 100644 index 0000000..e43743f --- /dev/null +++ b/Doxyfile @@ -0,0 +1,2426 @@ +# Doxyfile 1.8.12 + +# This file describes the settings to be used by the documentation system +# doxygen (www.doxygen.org) for a project. +# +# All text after a double hash (##) is considered a comment and is placed in +# front of the TAG it is preceding. +# +# All text after a single hash (#) is considered a comment and will be ignored. +# The format is: +# TAG = value [value, ...] +# For lists, items can also be appended using: +# TAG += value [value, ...] +# Values that contain spaces should be placed between quotes (\" \"). + +#--------------------------------------------------------------------------- +# Project related configuration options +#--------------------------------------------------------------------------- + +# This tag specifies the encoding used for all characters in the config file +# that follow. The default is UTF-8 which is also the encoding used for all text +# before the first occurrence of this tag. Doxygen uses libiconv (or the iconv +# built into libc) for the transcoding. See http://www.gnu.org/software/libiconv +# for the list of possible encodings. +# The default value is: UTF-8. + +DOXYFILE_ENCODING = UTF-8 + +# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by +# double-quotes, unless you are using Doxywizard) that should identify the +# project for which the documentation is generated. This name is used in the +# title of most generated pages and in a few other places. +# The default value is: My Project. + +PROJECT_NAME = "liburtc" + +# The PROJECT_NUMBER tag can be used to enter a project or revision number. This +# could be handy for archiving the generated documentation or if some version +# control system is used. + +PROJECT_NUMBER = + +# Using the PROJECT_BRIEF tag one can provide an optional one line description +# for a project that appears at the top of each page and should give viewer a +# quick idea about the purpose of the project. Keep the description short. + +PROJECT_BRIEF = "Small footprint WebRTC stack for embedded devices" + +# With the PROJECT_LOGO tag one can specify a logo or an icon that is included +# in the documentation. The maximum height of the logo should not exceed 55 +# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy +# the logo to the output directory. + +PROJECT_LOGO = + +# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path +# into which the generated documentation will be written. If a relative path is +# entered, it will be relative to the location where doxygen was started. If +# left blank the current directory will be used. + +OUTPUT_DIRECTORY = doxygen + +# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub- +# directories (in 2 levels) under the output directory of each output format and +# will distribute the generated files over these directories. Enabling this +# option can be useful when feeding doxygen a huge amount of source files, where +# putting all generated files in the same directory would otherwise causes +# performance problems for the file system. +# The default value is: NO. + +CREATE_SUBDIRS = NO + +# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII +# characters to appear in the names of generated files. If set to NO, non-ASCII +# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode +# U+3044. +# The default value is: NO. + +ALLOW_UNICODE_NAMES = NO + +# The OUTPUT_LANGUAGE tag is used to specify the language in which all +# documentation generated by doxygen is written. Doxygen will use this +# information to generate all constant output in the proper language. +# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, Chinese, +# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United States), +# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian, +# Indonesian, Italian, Japanese, Japanese-en (Japanese with English messages), +# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian, +# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, Russian, +# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish, +# Ukrainian and Vietnamese. +# The default value is: English. + +OUTPUT_LANGUAGE = English + +# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member +# descriptions after the members that are listed in the file and class +# documentation (similar to Javadoc). Set to NO to disable this. +# The default value is: YES. + +BRIEF_MEMBER_DESC = YES + +# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief +# description of a member or function before the detailed description +# +# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the +# brief descriptions will be completely suppressed. +# The default value is: YES. + +REPEAT_BRIEF = YES + +# This tag implements a quasi-intelligent brief description abbreviator that is +# used to form the text in various listings. Each string in this list, if found +# as the leading text of the brief description, will be stripped from the text +# and the result, after processing the whole list, is used as the annotated +# text. Otherwise, the brief description is used as-is. If left blank, the +# following values are used ($name is automatically replaced with the name of +# the entity):The $name class, The $name widget, The $name file, is, provides, +# specifies, contains, represents, a, an and the. + +ABBREVIATE_BRIEF = "The $name class" \ + "The $name widget" \ + "The $name file" \ + is \ + provides \ + specifies \ + contains \ + represents \ + a \ + an \ + the + +# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then +# doxygen will generate a detailed section even if there is only a brief +# description. +# The default value is: NO. + +ALWAYS_DETAILED_SEC = NO + +# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all +# inherited members of a class in the documentation of that class as if those +# members were ordinary class members. Constructors, destructors and assignment +# operators of the base classes will not be shown. +# The default value is: NO. + +INLINE_INHERITED_MEMB = NO + +# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path +# before files name in the file list and in the header files. If set to NO the +# shortest path that makes the file name unique will be used +# The default value is: YES. + +FULL_PATH_NAMES = YES + +# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path. +# Stripping is only done if one of the specified strings matches the left-hand +# part of the path. The tag can be used to show relative paths in the file list. +# If left blank the directory from which doxygen is run is used as the path to +# strip. +# +# Note that you can specify absolute paths here, but also relative paths, which +# will be relative from the directory where doxygen is started. +# This tag requires that the tag FULL_PATH_NAMES is set to YES. + +STRIP_FROM_PATH = src + +# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the +# path mentioned in the documentation of a class, which tells the reader which +# header file to include in order to use a class. If left blank only the name of +# the header file containing the class definition is used. Otherwise one should +# specify the list of include paths that are normally passed to the compiler +# using the -I flag. + +STRIP_FROM_INC_PATH = + +# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but +# less readable) file names. This can be useful is your file systems doesn't +# support long names like on DOS, Mac, or CD-ROM. +# The default value is: NO. + +SHORT_NAMES = NO + +# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the +# first line (until the first dot) of a Javadoc-style comment as the brief +# description. If set to NO, the Javadoc-style will behave just like regular Qt- +# style comments (thus requiring an explicit @brief command for a brief +# description.) +# The default value is: NO. + +JAVADOC_AUTOBRIEF = YES + +# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first +# line (until the first dot) of a Qt-style comment as the brief description. If +# set to NO, the Qt-style will behave just like regular Qt-style comments (thus +# requiring an explicit \brief command for a brief description.) +# The default value is: NO. + +QT_AUTOBRIEF = NO + +# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a +# multi-line C++ special comment block (i.e. a block of //! or /// comments) as +# a brief description. This used to be the default behavior. The new default is +# to treat a multi-line C++ comment block as a detailed description. Set this +# tag to YES if you prefer the old behavior instead. +# +# Note that setting this tag to YES also means that rational rose comments are +# not recognized any more. +# The default value is: NO. + +MULTILINE_CPP_IS_BRIEF = NO + +# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the +# documentation from any documented member that it re-implements. +# The default value is: YES. + +INHERIT_DOCS = YES + +# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new +# page for each member. If set to NO, the documentation of a member will be part +# of the file/class/namespace that contains it. +# The default value is: NO. + +SEPARATE_MEMBER_PAGES = NO + +# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen +# uses this value to replace tabs by spaces in code fragments. +# Minimum value: 1, maximum value: 16, default value: 4. + +TAB_SIZE = 4 + +# This tag can be used to specify a number of aliases that act as commands in +# the documentation. An alias has the form: +# name=value +# For example adding +# "sideeffect=@par Side Effects:\n" +# will allow you to put the command \sideeffect (or @sideeffect) in the +# documentation, which will result in a user-defined paragraph with heading +# "Side Effects:". You can put \n's in the value part of an alias to insert +# newlines. + +ALIASES = + +# This tag can be used to specify a number of word-keyword mappings (TCL only). +# A mapping has the form "name=value". For example adding "class=itcl::class" +# will allow you to use the command class in the itcl::class meaning. + +TCL_SUBST = + +# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources +# only. Doxygen will then generate output that is more tailored for C. For +# instance, some of the names that are used will be different. The list of all +# members will be omitted, etc. +# The default value is: NO. + +OPTIMIZE_OUTPUT_FOR_C = YES + +# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or +# Python sources only. Doxygen will then generate output that is more tailored +# for that language. For instance, namespaces will be presented as packages, +# qualified scopes will look different, etc. +# The default value is: NO. + +OPTIMIZE_OUTPUT_JAVA = NO + +# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran +# sources. Doxygen will then generate output that is tailored for Fortran. +# The default value is: NO. + +OPTIMIZE_FOR_FORTRAN = NO + +# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL +# sources. Doxygen will then generate output that is tailored for VHDL. +# The default value is: NO. + +OPTIMIZE_OUTPUT_VHDL = NO + +# Doxygen selects the parser to use depending on the extension of the files it +# parses. With this tag you can assign which parser to use for a given +# extension. Doxygen has a built-in mapping, but you can override or extend it +# using this tag. The format is ext=language, where ext is a file extension, and +# language is one of the parsers supported by doxygen: IDL, Java, Javascript, +# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran: +# FortranFixed, free formatted Fortran: FortranFree, unknown formatted Fortran: +# Fortran. In the later case the parser tries to guess whether the code is fixed +# or free formatted code, this is the default for Fortran type files), VHDL. For +# instance to make doxygen treat .inc files as Fortran files (default is PHP), +# and .f files as C (default is Fortran), use: inc=Fortran f=C. +# +# Note: For files without extension you can use no_extension as a placeholder. +# +# Note that for custom extensions you also need to set FILE_PATTERNS otherwise +# the files are not read by doxygen. + +EXTENSION_MAPPING = + +# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments +# according to the Markdown format, which allows for more readable +# documentation. See http://daringfireball.net/projects/markdown/ for details. +# The output of markdown processing is further processed by doxygen, so you can +# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in +# case of backward compatibilities issues. +# The default value is: YES. + +MARKDOWN_SUPPORT = YES + +# When the TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings up +# to that level are automatically included in the table of contents, even if +# they do not have an id attribute. +# Note: This feature currently applies only to Markdown headings. +# Minimum value: 0, maximum value: 99, default value: 0. +# This tag requires that the tag MARKDOWN_SUPPORT is set to YES. + +TOC_INCLUDE_HEADINGS = 0 + +# When enabled doxygen tries to link words that correspond to documented +# classes, or namespaces to their corresponding documentation. Such a link can +# be prevented in individual cases by putting a % sign in front of the word or +# globally by setting AUTOLINK_SUPPORT to NO. +# The default value is: YES. + +AUTOLINK_SUPPORT = YES + +# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want +# to include (a tag file for) the STL sources as input, then you should set this +# tag to YES in order to let doxygen match functions declarations and +# definitions whose arguments contain STL classes (e.g. func(std::string); +# versus func(std::string) {}). This also make the inheritance and collaboration +# diagrams that involve STL classes more complete and accurate. +# The default value is: NO. + +BUILTIN_STL_SUPPORT = NO + +# If you use Microsoft's C++/CLI language, you should set this option to YES to +# enable parsing support. +# The default value is: NO. + +CPP_CLI_SUPPORT = NO + +# Set the SIP_SUPPORT tag to YES if your project consists of sip (see: +# http://www.riverbankcomputing.co.uk/software/sip/intro) sources only. Doxygen +# will parse them like normal C++ but will assume all classes use public instead +# of private inheritance when no explicit protection keyword is present. +# The default value is: NO. + +SIP_SUPPORT = NO + +# For Microsoft's IDL there are propget and propput attributes to indicate +# getter and setter methods for a property. Setting this option to YES will make +# doxygen to replace the get and set methods by a property in the documentation. +# This will only work if the methods are indeed getting or setting a simple +# type. If this is not the case, or you want to show the methods anyway, you +# should set this option to NO. +# The default value is: YES. + +IDL_PROPERTY_SUPPORT = YES + +# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC +# tag is set to YES then doxygen will reuse the documentation of the first +# member in the group (if any) for the other members of the group. By default +# all members of a group must be documented explicitly. +# The default value is: NO. + +DISTRIBUTE_GROUP_DOC = NO + +# If one adds a struct or class to a group and this option is enabled, then also +# any nested class or struct is added to the same group. By default this option +# is disabled and one has to add nested compounds explicitly via \ingroup. +# The default value is: NO. + +GROUP_NESTED_COMPOUNDS = NO + +# Set the SUBGROUPING tag to YES to allow class member groups of the same type +# (for instance a group of public functions) to be put as a subgroup of that +# type (e.g. under the Public Functions section). Set it to NO to prevent +# subgrouping. Alternatively, this can be done per class using the +# \nosubgrouping command. +# The default value is: YES. + +SUBGROUPING = YES + +# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions +# are shown inside the group in which they are included (e.g. using \ingroup) +# instead of on a separate page (for HTML and Man pages) or section (for LaTeX +# and RTF). +# +# Note that this feature does not work in combination with +# SEPARATE_MEMBER_PAGES. +# The default value is: NO. + +INLINE_GROUPED_CLASSES = NO + +# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions +# with only public data fields or simple typedef fields will be shown inline in +# the documentation of the scope in which they are defined (i.e. file, +# namespace, or group documentation), provided this scope is documented. If set +# to NO, structs, classes, and unions are shown on a separate page (for HTML and +# Man pages) or section (for LaTeX and RTF). +# The default value is: NO. + +INLINE_SIMPLE_STRUCTS = NO + +# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or +# enum is documented as struct, union, or enum with the name of the typedef. So +# typedef struct TypeS {} TypeT, will appear in the documentation as a struct +# with name TypeT. When disabled the typedef will appear as a member of a file, +# namespace, or class. And the struct will be named TypeS. This can typically be +# useful for C code in case the coding convention dictates that all compound +# types are typedef'ed and only the typedef is referenced, never the tag name. +# The default value is: NO. + +TYPEDEF_HIDES_STRUCT = YES + +# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This +# cache is used to resolve symbols given their name and scope. Since this can be +# an expensive process and often the same symbol appears multiple times in the +# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small +# doxygen will become slower. If the cache is too large, memory is wasted. The +# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range +# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536 +# symbols. At the end of a run doxygen will report the cache usage and suggest +# the optimal cache size from a speed point of view. +# Minimum value: 0, maximum value: 9, default value: 0. + +LOOKUP_CACHE_SIZE = 0 + +#--------------------------------------------------------------------------- +# Build related configuration options +#--------------------------------------------------------------------------- + +# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in +# documentation are documented, even if no documentation was available. Private +# class members and static file members will be hidden unless the +# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES. +# Note: This will also disable the warnings about undocumented members that are +# normally produced when WARNINGS is set to YES. +# The default value is: NO. + +EXTRACT_ALL = NO + +# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will +# be included in the documentation. +# The default value is: NO. + +EXTRACT_PRIVATE = NO + +# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal +# scope will be included in the documentation. +# The default value is: NO. + +EXTRACT_PACKAGE = NO + +# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be +# included in the documentation. +# The default value is: NO. + +EXTRACT_STATIC = NO + +# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined +# locally in source files will be included in the documentation. If set to NO, +# only classes defined in header files are included. Does not have any effect +# for Java sources. +# The default value is: YES. + +EXTRACT_LOCAL_CLASSES = NO + +# This flag is only useful for Objective-C code. If set to YES, local methods, +# which are defined in the implementation section but not in the interface are +# included in the documentation. If set to NO, only methods in the interface are +# included. +# The default value is: NO. + +EXTRACT_LOCAL_METHODS = NO + +# If this flag is set to YES, the members of anonymous namespaces will be +# extracted and appear in the documentation as a namespace called +# 'anonymous_namespace{file}', where file will be replaced with the base name of +# the file that contains the anonymous namespace. By default anonymous namespace +# are hidden. +# The default value is: NO. + +EXTRACT_ANON_NSPACES = NO + +# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all +# undocumented members inside documented classes or files. If set to NO these +# members will be included in the various overviews, but no documentation +# section is generated. This option has no effect if EXTRACT_ALL is enabled. +# The default value is: NO. + +HIDE_UNDOC_MEMBERS = NO + +# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all +# undocumented classes that are normally visible in the class hierarchy. If set +# to NO, these classes will be included in the various overviews. This option +# has no effect if EXTRACT_ALL is enabled. +# The default value is: NO. + +HIDE_UNDOC_CLASSES = NO + +# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend +# (class|struct|union) declarations. If set to NO, these declarations will be +# included in the documentation. +# The default value is: NO. + +HIDE_FRIEND_COMPOUNDS = NO + +# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any +# documentation blocks found inside the body of a function. If set to NO, these +# blocks will be appended to the function's detailed documentation block. +# The default value is: NO. + +HIDE_IN_BODY_DOCS = NO + +# The INTERNAL_DOCS tag determines if documentation that is typed after a +# \internal command is included. If the tag is set to NO then the documentation +# will be excluded. Set it to YES to include the internal documentation. +# The default value is: NO. + +INTERNAL_DOCS = NO + +# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate file +# names in lower-case letters. If set to YES, upper-case letters are also +# allowed. This is useful if you have classes or files whose names only differ +# in case and if your file system supports case sensitive file names. Windows +# and Mac users are advised to set this option to NO. +# The default value is: system dependent. + +CASE_SENSE_NAMES = NO + +# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with +# their full class and namespace scopes in the documentation. If set to YES, the +# scope will be hidden. +# The default value is: NO. + +HIDE_SCOPE_NAMES = NO + +# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will +# append additional text to a page's title, such as Class Reference. If set to +# YES the compound reference will be hidden. +# The default value is: NO. + +HIDE_COMPOUND_REFERENCE= NO + +# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of +# the files that are included by a file in the documentation of that file. +# The default value is: YES. + +SHOW_INCLUDE_FILES = YES + +# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each +# grouped member an include statement to the documentation, telling the reader +# which file to include in order to use the member. +# The default value is: NO. + +SHOW_GROUPED_MEMB_INC = NO + +# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include +# files with double quotes in the documentation rather than with sharp brackets. +# The default value is: NO. + +FORCE_LOCAL_INCLUDES = NO + +# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the +# documentation for inline members. +# The default value is: YES. + +INLINE_INFO = YES + +# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the +# (detailed) documentation of file and class members alphabetically by member +# name. If set to NO, the members will appear in declaration order. +# The default value is: YES. + +SORT_MEMBER_DOCS = YES + +# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief +# descriptions of file, namespace and class members alphabetically by member +# name. If set to NO, the members will appear in declaration order. Note that +# this will also influence the order of the classes in the class list. +# The default value is: NO. + +SORT_BRIEF_DOCS = NO + +# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the +# (brief and detailed) documentation of class members so that constructors and +# destructors are listed first. If set to NO the constructors will appear in the +# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS. +# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief +# member documentation. +# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting +# detailed member documentation. +# The default value is: NO. + +SORT_MEMBERS_CTORS_1ST = NO + +# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy +# of group names into alphabetical order. If set to NO the group names will +# appear in their defined order. +# The default value is: NO. + +SORT_GROUP_NAMES = NO + +# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by +# fully-qualified names, including namespaces. If set to NO, the class list will +# be sorted only by class name, not including the namespace part. +# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES. +# Note: This option applies only to the class list, not to the alphabetical +# list. +# The default value is: NO. + +SORT_BY_SCOPE_NAME = NO + +# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper +# type resolution of all parameters of a function it will reject a match between +# the prototype and the implementation of a member function even if there is +# only one candidate or it is obvious which candidate to choose by doing a +# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still +# accept a match between prototype and implementation in such cases. +# The default value is: NO. + +STRICT_PROTO_MATCHING = NO + +# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo +# list. This list is created by putting \todo commands in the documentation. +# The default value is: YES. + +GENERATE_TODOLIST = YES + +# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test +# list. This list is created by putting \test commands in the documentation. +# The default value is: YES. + +GENERATE_TESTLIST = YES + +# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug +# list. This list is created by putting \bug commands in the documentation. +# The default value is: YES. + +GENERATE_BUGLIST = YES + +# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO) +# the deprecated list. This list is created by putting \deprecated commands in +# the documentation. +# The default value is: YES. + +GENERATE_DEPRECATEDLIST= YES + +# The ENABLED_SECTIONS tag can be used to enable conditional documentation +# sections, marked by \if <section_label> ... \endif and \cond <section_label> +# ... \endcond blocks. + +ENABLED_SECTIONS = + +# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the +# initial value of a variable or macro / define can have for it to appear in the +# documentation. If the initializer consists of more lines than specified here +# it will be hidden. Use a value of 0 to hide initializers completely. The +# appearance of the value of individual variables and macros / defines can be +# controlled using \showinitializer or \hideinitializer command in the +# documentation regardless of this setting. +# Minimum value: 0, maximum value: 10000, default value: 30. + +MAX_INITIALIZER_LINES = 30 + +# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at +# the bottom of the documentation of classes and structs. If set to YES, the +# list will mention the files that were used to generate the documentation. +# The default value is: YES. + +SHOW_USED_FILES = YES + +# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This +# will remove the Files entry from the Quick Index and from the Folder Tree View +# (if specified). +# The default value is: YES. + +SHOW_FILES = YES + +# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces +# page. This will remove the Namespaces entry from the Quick Index and from the +# Folder Tree View (if specified). +# The default value is: YES. + +SHOW_NAMESPACES = YES + +# The FILE_VERSION_FILTER tag can be used to specify a program or script that +# doxygen should invoke to get the current version for each file (typically from +# the version control system). Doxygen will invoke the program by executing (via +# popen()) the command command input-file, where command is the value of the +# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided +# by doxygen. Whatever the program writes to standard output is used as the file +# version. For an example see the documentation. + +FILE_VERSION_FILTER = + +# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed +# by doxygen. The layout file controls the global structure of the generated +# output files in an output format independent way. To create the layout file +# that represents doxygen's defaults, run doxygen with the -l option. You can +# optionally specify a file name after the option, if omitted DoxygenLayout.xml +# will be used as the name of the layout file. +# +# Note that if you run doxygen from a directory containing a file called +# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE +# tag is left empty. + +LAYOUT_FILE = + +# The CITE_BIB_FILES tag can be used to specify one or more bib files containing +# the reference definitions. This must be a list of .bib files. The .bib +# extension is automatically appended if omitted. This requires the bibtex tool +# to be installed. See also http://en.wikipedia.org/wiki/BibTeX for more info. +# For LaTeX the style of the bibliography can be controlled using +# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the +# search path. See also \cite for info how to create references. + +CITE_BIB_FILES = + +#--------------------------------------------------------------------------- +# Configuration options related to warning and progress messages +#--------------------------------------------------------------------------- + +# The QUIET tag can be used to turn on/off the messages that are generated to +# standard output by doxygen. If QUIET is set to YES this implies that the +# messages are off. +# The default value is: NO. + +QUIET = YES + +# The WARNINGS tag can be used to turn on/off the warning messages that are +# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES +# this implies that the warnings are on. +# +# Tip: Turn warnings on while writing the documentation. +# The default value is: YES. + +WARNINGS = YES + +# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate +# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag +# will automatically be disabled. +# The default value is: YES. + +WARN_IF_UNDOCUMENTED = YES + +# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for +# potential errors in the documentation, such as not documenting some parameters +# in a documented function, or documenting parameters that don't exist or using +# markup commands wrongly. +# The default value is: YES. + +WARN_IF_DOC_ERROR = YES + +# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that +# are documented, but have no documentation for their parameters or return +# value. If set to NO, doxygen will only warn about wrong or incomplete +# parameter documentation, but not about the absence of documentation. +# The default value is: NO. + +WARN_NO_PARAMDOC = NO + +# If the WARN_AS_ERROR tag is set to YES then doxygen will immediately stop when +# a warning is encountered. +# The default value is: NO. + +WARN_AS_ERROR = NO + +# The WARN_FORMAT tag determines the format of the warning messages that doxygen +# can produce. The string should contain the $file, $line, and $text tags, which +# will be replaced by the file and line number from which the warning originated +# and the warning text. Optionally the format may contain $version, which will +# be replaced by the version of the file (if it could be obtained via +# FILE_VERSION_FILTER) +# The default value is: $file:$line: $text. + +WARN_FORMAT = "$file:$line: $text" + +# The WARN_LOGFILE tag can be used to specify a file to which warning and error +# messages should be written. If left blank the output is written to standard +# error (stderr). + +WARN_LOGFILE = + +#--------------------------------------------------------------------------- +# Configuration options related to the input files +#--------------------------------------------------------------------------- + +# The INPUT tag is used to specify the files and/or directories that contain +# documented source files. You may enter file names like myfile.cpp or +# directories like /usr/src/myproject. Separate the files or directories with +# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING +# Note: If this tag is empty the current directory is searched. + +INPUT = src/urtc.h + +# This tag can be used to specify the character encoding of the source files +# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses +# libiconv (or the iconv built into libc) for the transcoding. See the libiconv +# documentation (see: http://www.gnu.org/software/libiconv) for the list of +# possible encodings. +# The default value is: UTF-8. + +INPUT_ENCODING = UTF-8 + +# If the value of the INPUT tag contains directories, you can use the +# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and +# *.h) to filter out the source-files in the directories. +# +# Note that for custom extensions or not directly supported extensions you also +# need to set EXTENSION_MAPPING for the extension otherwise the files are not +# read by doxygen. +# +# If left blank the following patterns are tested:*.c, *.cc, *.cxx, *.cpp, +# *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h, +# *.hh, *.hxx, *.hpp, *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, *.inc, +# *.m, *.markdown, *.md, *.mm, *.dox, *.py, *.pyw, *.f90, *.f95, *.f03, *.f08, +# *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf and *.qsf. + +FILE_PATTERNS = *.c \ + *.h \ + +# The RECURSIVE tag can be used to specify whether or not subdirectories should +# be searched for input files as well. +# The default value is: NO. + +RECURSIVE = YES + +# The EXCLUDE tag can be used to specify files and/or directories that should be +# excluded from the INPUT source files. This way you can easily exclude a +# subdirectory from a directory tree whose root is specified with the INPUT tag. +# +# Note that relative paths are relative to the directory from which doxygen is +# run. + +EXCLUDE = + +# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or +# directories that are symbolic links (a Unix file system feature) are excluded +# from the input. +# The default value is: NO. + +EXCLUDE_SYMLINKS = NO + +# If the value of the INPUT tag contains directories, you can use the +# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude +# certain files from those directories. +# +# Note that the wildcards are matched against the file with absolute path, so to +# exclude all test directories for example use the pattern */test/* + +EXCLUDE_PATTERNS = + +# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names +# (namespaces, classes, functions, etc.) that should be excluded from the +# output. The symbol name can be a fully qualified name, a word, or if the +# wildcard * is used, a substring. Examples: ANamespace, AClass, +# AClass::ANamespace, ANamespace::*Test +# +# Note that the wildcards are matched against the file with absolute path, so to +# exclude all test directories use the pattern */test/* + +EXCLUDE_SYMBOLS = + +# The EXAMPLE_PATH tag can be used to specify one or more files or directories +# that contain example code fragments that are included (see the \include +# command). + +EXAMPLE_PATH = examples + +# If the value of the EXAMPLE_PATH tag contains directories, you can use the +# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and +# *.h) to filter out the source-files in the directories. If left blank all +# files are included. + +EXAMPLE_PATTERNS = * + +# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be +# searched for input files to be used with the \include or \dontinclude commands +# irrespective of the value of the RECURSIVE tag. +# The default value is: NO. + +EXAMPLE_RECURSIVE = NO + +# The IMAGE_PATH tag can be used to specify one or more files or directories +# that contain images that are to be included in the documentation (see the +# \image command). + +IMAGE_PATH = + +# The INPUT_FILTER tag can be used to specify a program that doxygen should +# invoke to filter for each input file. Doxygen will invoke the filter program +# by executing (via popen()) the command: +# +# <filter> <input-file> +# +# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is the +# name of an input file. Doxygen will then use the output that the filter +# program writes to standard output. If FILTER_PATTERNS is specified, this tag +# will be ignored. +# +# Note that the filter must not add or remove lines; it is applied before the +# code is scanned, but not when the output code is generated. If lines are added +# or removed, the anchors will not be placed correctly. +# +# Note that for custom extensions or not directly supported extensions you also +# need to set EXTENSION_MAPPING for the extension otherwise the files are not +# properly processed by doxygen. + +INPUT_FILTER = + +# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern +# basis. Doxygen will compare the file name with each pattern and apply the +# filter if there is a match. The filters are a list of the form: pattern=filter +# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how +# filters are used. If the FILTER_PATTERNS tag is empty or if none of the +# patterns match the file name, INPUT_FILTER is applied. +# +# Note that for custom extensions or not directly supported extensions you also +# need to set EXTENSION_MAPPING for the extension otherwise the files are not +# properly processed by doxygen. + +FILTER_PATTERNS = + +# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using +# INPUT_FILTER) will also be used to filter the input files that are used for +# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES). +# The default value is: NO. + +FILTER_SOURCE_FILES = NO + +# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file +# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and +# it is also possible to disable source filtering for a specific pattern using +# *.ext= (so without naming a filter). +# This tag requires that the tag FILTER_SOURCE_FILES is set to YES. + +FILTER_SOURCE_PATTERNS = + +# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that +# is part of the input, its contents will be placed on the main page +# (index.html). This can be useful if you have a project on for instance GitHub +# and want to reuse the introduction page also for the doxygen output. + +USE_MDFILE_AS_MAINPAGE = + +#--------------------------------------------------------------------------- +# Configuration options related to source browsing +#--------------------------------------------------------------------------- + +# If the SOURCE_BROWSER tag is set to YES then a list of source files will be +# generated. Documented entities will be cross-referenced with these sources. +# +# Note: To get rid of all source code in the generated output, make sure that +# also VERBATIM_HEADERS is set to NO. +# The default value is: NO. + +SOURCE_BROWSER = NO + +# Setting the INLINE_SOURCES tag to YES will include the body of functions, +# classes and enums directly into the documentation. +# The default value is: NO. + +INLINE_SOURCES = NO + +# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any +# special comment blocks from generated source code fragments. Normal C, C++ and +# Fortran comments will always remain visible. +# The default value is: YES. + +STRIP_CODE_COMMENTS = YES + +# If the REFERENCED_BY_RELATION tag is set to YES then for each documented +# function all documented functions referencing it will be listed. +# The default value is: NO. + +REFERENCED_BY_RELATION = NO + +# If the REFERENCES_RELATION tag is set to YES then for each documented function +# all documented entities called/used by that function will be listed. +# The default value is: NO. + +REFERENCES_RELATION = NO + +# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set +# to YES then the hyperlinks from functions in REFERENCES_RELATION and +# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will +# link to the documentation. +# The default value is: YES. + +REFERENCES_LINK_SOURCE = YES + +# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the +# source code will show a tooltip with additional information such as prototype, +# brief description and links to the definition and documentation. Since this +# will make the HTML file larger and loading of large files a bit slower, you +# can opt to disable this feature. +# The default value is: YES. +# This tag requires that the tag SOURCE_BROWSER is set to YES. + +SOURCE_TOOLTIPS = YES + +# If the USE_HTAGS tag is set to YES then the references to source code will +# point to the HTML generated by the htags(1) tool instead of doxygen built-in +# source browser. The htags tool is part of GNU's global source tagging system +# (see http://www.gnu.org/software/global/global.html). You will need version +# 4.8.6 or higher. +# +# To use it do the following: +# - Install the latest version of global +# - Enable SOURCE_BROWSER and USE_HTAGS in the config file +# - Make sure the INPUT points to the root of the source tree +# - Run doxygen as normal +# +# Doxygen will invoke htags (and that will in turn invoke gtags), so these +# tools must be available from the command line (i.e. in the search path). +# +# The result: instead of the source browser generated by doxygen, the links to +# source code will now point to the output of htags. +# The default value is: NO. +# This tag requires that the tag SOURCE_BROWSER is set to YES. + +USE_HTAGS = NO + +# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a +# verbatim copy of the header file for each class for which an include is +# specified. Set to NO to disable this. +# See also: Section \class. +# The default value is: YES. + +VERBATIM_HEADERS = YES + +#--------------------------------------------------------------------------- +# Configuration options related to the alphabetical class index +#--------------------------------------------------------------------------- + +# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all +# compounds will be generated. Enable this if the project contains a lot of +# classes, structs, unions or interfaces. +# The default value is: YES. + +ALPHABETICAL_INDEX = YES + +# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in +# which the alphabetical index list will be split. +# Minimum value: 1, maximum value: 20, default value: 5. +# This tag requires that the tag ALPHABETICAL_INDEX is set to YES. + +COLS_IN_ALPHA_INDEX = 5 + +# In case all classes in a project start with a common prefix, all classes will +# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag +# can be used to specify a prefix (or a list of prefixes) that should be ignored +# while generating the index headers. +# This tag requires that the tag ALPHABETICAL_INDEX is set to YES. + +IGNORE_PREFIX = + +#--------------------------------------------------------------------------- +# Configuration options related to the HTML output +#--------------------------------------------------------------------------- + +# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output +# The default value is: YES. + +GENERATE_HTML = YES + +# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a +# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of +# it. +# The default directory is: html. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_OUTPUT = html + +# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each +# generated HTML page (for example: .htm, .php, .asp). +# The default value is: .html. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_FILE_EXTENSION = .html + +# The HTML_HEADER tag can be used to specify a user-defined HTML header file for +# each generated HTML page. If the tag is left blank doxygen will generate a +# standard header. +# +# To get valid HTML the header file that includes any scripts and style sheets +# that doxygen needs, which is dependent on the configuration options used (e.g. +# the setting GENERATE_TREEVIEW). It is highly recommended to start with a +# default header using +# doxygen -w html new_header.html new_footer.html new_stylesheet.css +# YourConfigFile +# and then modify the file new_header.html. See also section "Doxygen usage" +# for information on how to generate the default header that doxygen normally +# uses. +# Note: The header is subject to change so you typically have to regenerate the +# default header when upgrading to a newer version of doxygen. For a description +# of the possible markers and block names see the documentation. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_HEADER = + +# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each +# generated HTML page. If the tag is left blank doxygen will generate a standard +# footer. See HTML_HEADER for more information on how to generate a default +# footer and what special commands can be used inside the footer. See also +# section "Doxygen usage" for information on how to generate the default footer +# that doxygen normally uses. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_FOOTER = + +# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style +# sheet that is used by each HTML page. It can be used to fine-tune the look of +# the HTML output. If left blank doxygen will generate a default style sheet. +# See also section "Doxygen usage" for information on how to generate the style +# sheet that doxygen normally uses. +# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as +# it is more robust and this tag (HTML_STYLESHEET) will in the future become +# obsolete. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_STYLESHEET = + +# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined +# cascading style sheets that are included after the standard style sheets +# created by doxygen. Using this option one can overrule certain style aspects. +# This is preferred over using HTML_STYLESHEET since it does not replace the +# standard style sheet and is therefore more robust against future updates. +# Doxygen will copy the style sheet files to the output directory. +# Note: The order of the extra style sheet files is of importance (e.g. the last +# style sheet in the list overrules the setting of the previous ones in the +# list). For an example see the documentation. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_EXTRA_STYLESHEET = + +# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or +# other source files which should be copied to the HTML output directory. Note +# that these files will be copied to the base HTML output directory. Use the +# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these +# files. In the HTML_STYLESHEET file, use the file name only. Also note that the +# files will be copied as-is; there are no commands or markers available. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_EXTRA_FILES = + +# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen +# will adjust the colors in the style sheet and background images according to +# this color. Hue is specified as an angle on a colorwheel, see +# http://en.wikipedia.org/wiki/Hue for more information. For instance the value +# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300 +# purple, and 360 is red again. +# Minimum value: 0, maximum value: 359, default value: 220. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_COLORSTYLE_HUE = 30 + +# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors +# in the HTML output. For a value of 0 the output will use grayscales only. A +# value of 255 will produce the most vivid colors. +# Minimum value: 0, maximum value: 255, default value: 100. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_COLORSTYLE_SAT = 150 + +# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the +# luminance component of the colors in the HTML output. Values below 100 +# gradually make the output lighter, whereas values above 100 make the output +# darker. The value divided by 100 is the actual gamma applied, so 80 represents +# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not +# change the gamma. +# Minimum value: 40, maximum value: 240, default value: 80. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_COLORSTYLE_GAMMA = 80 + +# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML +# page will contain the date and time when the page was generated. Setting this +# to YES can help to show when doxygen was last run and thus if the +# documentation is up to date. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_TIMESTAMP = YES + +# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML +# documentation will contain sections that can be hidden and shown after the +# page has loaded. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_DYNAMIC_SECTIONS = NO + +# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries +# shown in the various tree structured indices initially; the user can expand +# and collapse entries dynamically later on. Doxygen will expand the tree to +# such a level that at most the specified number of entries are visible (unless +# a fully collapsed tree already exceeds this amount). So setting the number of +# entries 1 will produce a full collapsed tree by default. 0 is a special value +# representing an infinite number of entries and will result in a full expanded +# tree by default. +# Minimum value: 0, maximum value: 9999, default value: 100. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_INDEX_NUM_ENTRIES = 100 + +# If the GENERATE_DOCSET tag is set to YES, additional index files will be +# generated that can be used as input for Apple's Xcode 3 integrated development +# environment (see: http://developer.apple.com/tools/xcode/), introduced with +# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a +# Makefile in the HTML output directory. Running make will produce the docset in +# that directory and running make install will install the docset in +# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at +# startup. See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html +# for more information. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_DOCSET = NO + +# This tag determines the name of the docset feed. A documentation feed provides +# an umbrella under which multiple documentation sets from a single provider +# (such as a company or product suite) can be grouped. +# The default value is: Doxygen generated docs. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_FEEDNAME = "Doxygen generated docs" + +# This tag specifies a string that should uniquely identify the documentation +# set bundle. This should be a reverse domain-name style string, e.g. +# com.mycompany.MyDocSet. Doxygen will append .docset to the name. +# The default value is: org.doxygen.Project. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_BUNDLE_ID = org.liburtc + +# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify +# the documentation publisher. This should be a reverse domain-name style +# string, e.g. com.mycompany.MyDocSet.documentation. +# The default value is: org.doxygen.Publisher. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_PUBLISHER_ID = org.liburtc + +# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher. +# The default value is: Publisher. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_PUBLISHER_NAME = liburtc.org + +# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three +# additional HTML index files: index.hhp, index.hhc, and index.hhk. The +# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop +# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on +# Windows. +# +# The HTML Help Workshop contains a compiler that can convert all HTML output +# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML +# files are now used as the Windows 98 help format, and will replace the old +# Windows help format (.hlp) on all Windows platforms in the future. Compressed +# HTML files also contain an index, a table of contents, and you can search for +# words in the documentation. The HTML workshop also contains a viewer for +# compressed HTML files. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_HTMLHELP = NO + +# The CHM_FILE tag can be used to specify the file name of the resulting .chm +# file. You can add a path in front of the file if the result should not be +# written to the html output directory. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +CHM_FILE = + +# The HHC_LOCATION tag can be used to specify the location (absolute path +# including file name) of the HTML help compiler (hhc.exe). If non-empty, +# doxygen will try to run the HTML help compiler on the generated index.hhp. +# The file has to be specified with full path. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +HHC_LOCATION = + +# The GENERATE_CHI flag controls if a separate .chi index file is generated +# (YES) or that it should be included in the master .chm file (NO). +# The default value is: NO. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +GENERATE_CHI = NO + +# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc) +# and project file content. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +CHM_INDEX_ENCODING = + +# The BINARY_TOC flag controls whether a binary table of contents is generated +# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it +# enables the Previous and Next buttons. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +BINARY_TOC = NO + +# The TOC_EXPAND flag can be set to YES to add extra items for group members to +# the table of contents of the HTML help documentation and to the tree view. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +TOC_EXPAND = NO + +# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and +# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that +# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help +# (.qch) of the generated HTML documentation. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_QHP = NO + +# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify +# the file name of the resulting .qch file. The path specified is relative to +# the HTML output folder. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QCH_FILE = + +# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help +# Project output. For more information please see Qt Help Project / Namespace +# (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#namespace). +# The default value is: org.doxygen.Project. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_NAMESPACE = org.doxygen.Project + +# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt +# Help Project output. For more information please see Qt Help Project / Virtual +# Folders (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#virtual- +# folders). +# The default value is: doc. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_VIRTUAL_FOLDER = doc + +# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom +# filter to add. For more information please see Qt Help Project / Custom +# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom- +# filters). +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_CUST_FILTER_NAME = + +# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the +# custom filter to add. For more information please see Qt Help Project / Custom +# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom- +# filters). +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_CUST_FILTER_ATTRS = + +# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this +# project's filter section matches. Qt Help Project / Filter Attributes (see: +# http://qt-project.org/doc/qt-4.8/qthelpproject.html#filter-attributes). +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_SECT_FILTER_ATTRS = + +# The QHG_LOCATION tag can be used to specify the location of Qt's +# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the +# generated .qhp file. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHG_LOCATION = + +# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be +# generated, together with the HTML files, they form an Eclipse help plugin. To +# install this plugin and make it available under the help contents menu in +# Eclipse, the contents of the directory containing the HTML and XML files needs +# to be copied into the plugins directory of eclipse. The name of the directory +# within the plugins directory should be the same as the ECLIPSE_DOC_ID value. +# After copying Eclipse needs to be restarted before the help appears. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_ECLIPSEHELP = NO + +# A unique identifier for the Eclipse help plugin. When installing the plugin +# the directory name containing the HTML and XML files should also have this +# name. Each documentation set should have its own identifier. +# The default value is: org.doxygen.Project. +# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES. + +ECLIPSE_DOC_ID = org.doxygen.Project + +# If you want full control over the layout of the generated HTML pages it might +# be necessary to disable the index and replace it with your own. The +# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top +# of each HTML page. A value of NO enables the index and the value YES disables +# it. Since the tabs in the index contain the same information as the navigation +# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +DISABLE_INDEX = NO + +# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index +# structure should be generated to display hierarchical information. If the tag +# value is set to YES, a side panel will be generated containing a tree-like +# index structure (just like the one that is generated for HTML Help). For this +# to work a browser that supports JavaScript, DHTML, CSS and frames is required +# (i.e. any modern browser). Windows users are probably better off using the +# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can +# further fine-tune the look of the index. As an example, the default style +# sheet generated by doxygen has an example that shows how to put an image at +# the root of the tree instead of the PROJECT_NAME. Since the tree basically has +# the same information as the tab index, you could consider setting +# DISABLE_INDEX to YES when enabling this option. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_TREEVIEW = NO + +# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that +# doxygen will group on one line in the generated HTML documentation. +# +# Note that a value of 0 will completely suppress the enum values from appearing +# in the overview section. +# Minimum value: 0, maximum value: 20, default value: 4. +# This tag requires that the tag GENERATE_HTML is set to YES. + +ENUM_VALUES_PER_LINE = 4 + +# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used +# to set the initial width (in pixels) of the frame in which the tree is shown. +# Minimum value: 0, maximum value: 1500, default value: 250. +# This tag requires that the tag GENERATE_HTML is set to YES. + +TREEVIEW_WIDTH = 250 + +# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to +# external symbols imported via tag files in a separate window. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +EXT_LINKS_IN_WINDOW = NO + +# Use this tag to change the font size of LaTeX formulas included as images in +# the HTML documentation. When you change the font size after a successful +# doxygen run you need to manually remove any form_*.png images from the HTML +# output directory to force them to be regenerated. +# Minimum value: 8, maximum value: 50, default value: 10. +# This tag requires that the tag GENERATE_HTML is set to YES. + +FORMULA_FONTSIZE = 10 + +# Use the FORMULA_TRANPARENT tag to determine whether or not the images +# generated for formulas are transparent PNGs. Transparent PNGs are not +# supported properly for IE 6.0, but are supported on all modern browsers. +# +# Note that when changing this option you need to delete any form_*.png files in +# the HTML output directory before the changes have effect. +# The default value is: YES. +# This tag requires that the tag GENERATE_HTML is set to YES. + +FORMULA_TRANSPARENT = YES + +# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see +# http://www.mathjax.org) which uses client side Javascript for the rendering +# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX +# installed or if you want to formulas look prettier in the HTML output. When +# enabled you may also need to install MathJax separately and configure the path +# to it using the MATHJAX_RELPATH option. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +USE_MATHJAX = NO + +# When MathJax is enabled you can set the default output format to be used for +# the MathJax output. See the MathJax site (see: +# http://docs.mathjax.org/en/latest/output.html) for more details. +# Possible values are: HTML-CSS (which is slower, but has the best +# compatibility), NativeMML (i.e. MathML) and SVG. +# The default value is: HTML-CSS. +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_FORMAT = HTML-CSS + +# When MathJax is enabled you need to specify the location relative to the HTML +# output directory using the MATHJAX_RELPATH option. The destination directory +# should contain the MathJax.js script. For instance, if the mathjax directory +# is located at the same level as the HTML output directory, then +# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax +# Content Delivery Network so you can quickly see the result without installing +# MathJax. However, it is strongly recommended to install a local copy of +# MathJax from http://www.mathjax.org before deployment. +# The default value is: http://cdn.mathjax.org/mathjax/latest. +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_RELPATH = http://cdn.mathjax.org/mathjax/latest + +# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax +# extension names that should be enabled during MathJax rendering. For example +# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_EXTENSIONS = + +# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces +# of code that will be used on startup of the MathJax code. See the MathJax site +# (see: http://docs.mathjax.org/en/latest/output.html) for more details. For an +# example see the documentation. +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_CODEFILE = + +# When the SEARCHENGINE tag is enabled doxygen will generate a search box for +# the HTML output. The underlying search engine uses javascript and DHTML and +# should work on any modern browser. Note that when using HTML help +# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET) +# there is already a search function so this one should typically be disabled. +# For large projects the javascript based search engine can be slow, then +# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to +# search using the keyboard; to jump to the search box use <access key> + S +# (what the <access key> is depends on the OS and browser, but it is typically +# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor down +# key> to jump into the search results window, the results can be navigated +# using the <cursor keys>. Press <Enter> to select an item or <escape> to cancel +# the search. The filter options can be selected when the cursor is inside the +# search box by pressing <Shift>+<cursor down>. Also here use the <cursor keys> +# to select a filter and <Enter> or <escape> to activate or cancel the filter +# option. +# The default value is: YES. +# This tag requires that the tag GENERATE_HTML is set to YES. + +SEARCHENGINE = YES + +# When the SERVER_BASED_SEARCH tag is enabled the search engine will be +# implemented using a web server instead of a web client using Javascript. There +# are two flavors of web server based searching depending on the EXTERNAL_SEARCH +# setting. When disabled, doxygen will generate a PHP script for searching and +# an index file used by the script. When EXTERNAL_SEARCH is enabled the indexing +# and searching needs to be provided by external tools. See the section +# "External Indexing and Searching" for details. +# The default value is: NO. +# This tag requires that the tag SEARCHENGINE is set to YES. + +SERVER_BASED_SEARCH = NO + +# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the PHP +# script for searching. Instead the search results are written to an XML file +# which needs to be processed by an external indexer. Doxygen will invoke an +# external search engine pointed to by the SEARCHENGINE_URL option to obtain the +# search results. +# +# Doxygen ships with an example indexer (doxyindexer) and search engine +# (doxysearch.cgi) which are based on the open source search engine library +# Xapian (see: http://xapian.org/). +# +# See the section "External Indexing and Searching" for details. +# The default value is: NO. +# This tag requires that the tag SEARCHENGINE is set to YES. + +EXTERNAL_SEARCH = NO + +# The SEARCHENGINE_URL should point to a search engine hosted by a web server +# which will return the search results when EXTERNAL_SEARCH is enabled. +# +# Doxygen ships with an example indexer (doxyindexer) and search engine +# (doxysearch.cgi) which are based on the open source search engine library +# Xapian (see: http://xapian.org/). See the section "External Indexing and +# Searching" for details. +# This tag requires that the tag SEARCHENGINE is set to YES. + +SEARCHENGINE_URL = + +# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed +# search data is written to a file for indexing by an external tool. With the +# SEARCHDATA_FILE tag the name of this file can be specified. +# The default file is: searchdata.xml. +# This tag requires that the tag SEARCHENGINE is set to YES. + +SEARCHDATA_FILE = searchdata.xml + +# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the +# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This is +# useful in combination with EXTRA_SEARCH_MAPPINGS to search through multiple +# projects and redirect the results back to the right project. +# This tag requires that the tag SEARCHENGINE is set to YES. + +EXTERNAL_SEARCH_ID = + +# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through doxygen +# projects other than the one defined by this configuration file, but that are +# all added to the same external search index. Each project needs to have a +# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id of +# to a relative location where the documentation can be found. The format is: +# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ... +# This tag requires that the tag SEARCHENGINE is set to YES. + +EXTRA_SEARCH_MAPPINGS = + +#--------------------------------------------------------------------------- +# Configuration options related to the LaTeX output +#--------------------------------------------------------------------------- + +# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output. +# The default value is: YES. + +GENERATE_LATEX = NO + +# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. If a +# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of +# it. +# The default directory is: latex. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_OUTPUT = latex + +# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be +# invoked. +# +# Note that when enabling USE_PDFLATEX this option is only used for generating +# bitmaps for formulas in the HTML output, but not in the Makefile that is +# written to the output directory. +# The default file is: latex. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_CMD_NAME = latex + +# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to generate +# index for LaTeX. +# The default file is: makeindex. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +MAKEINDEX_CMD_NAME = makeindex + +# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact LaTeX +# documents. This may be useful for small projects and may help to save some +# trees in general. +# The default value is: NO. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +COMPACT_LATEX = NO + +# The PAPER_TYPE tag can be used to set the paper type that is used by the +# printer. +# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal (8.5 x +# 14 inches) and executive (7.25 x 10.5 inches). +# The default value is: a4. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +PAPER_TYPE = a4 + +# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package names +# that should be included in the LaTeX output. The package can be specified just +# by its name or with the correct syntax as to be used with the LaTeX +# \usepackage command. To get the times font for instance you can specify : +# EXTRA_PACKAGES=times or EXTRA_PACKAGES={times} +# To use the option intlimits with the amsmath package you can specify: +# EXTRA_PACKAGES=[intlimits]{amsmath} +# If left blank no extra packages will be included. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +EXTRA_PACKAGES = + +# The LATEX_HEADER tag can be used to specify a personal LaTeX header for the +# generated LaTeX document. The header should contain everything until the first +# chapter. If it is left blank doxygen will generate a standard header. See +# section "Doxygen usage" for information on how to let doxygen write the +# default header to a separate file. +# +# Note: Only use a user-defined header if you know what you are doing! The +# following commands have a special meaning inside the header: $title, +# $datetime, $date, $doxygenversion, $projectname, $projectnumber, +# $projectbrief, $projectlogo. Doxygen will replace $title with the empty +# string, for the replacement values of the other commands the user is referred +# to HTML_HEADER. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_HEADER = + +# The LATEX_FOOTER tag can be used to specify a personal LaTeX footer for the +# generated LaTeX document. The footer should contain everything after the last +# chapter. If it is left blank doxygen will generate a standard footer. See +# LATEX_HEADER for more information on how to generate a default footer and what +# special commands can be used inside the footer. +# +# Note: Only use a user-defined footer if you know what you are doing! +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_FOOTER = + +# The LATEX_EXTRA_STYLESHEET tag can be used to specify additional user-defined +# LaTeX style sheets that are included after the standard style sheets created +# by doxygen. Using this option one can overrule certain style aspects. Doxygen +# will copy the style sheet files to the output directory. +# Note: The order of the extra style sheet files is of importance (e.g. the last +# style sheet in the list overrules the setting of the previous ones in the +# list). +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_EXTRA_STYLESHEET = + +# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images or +# other source files which should be copied to the LATEX_OUTPUT output +# directory. Note that the files will be copied as-is; there are no commands or +# markers available. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_EXTRA_FILES = + +# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is +# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file will +# contain links (just like the HTML output) instead of page references. This +# makes the output suitable for online browsing using a PDF viewer. +# The default value is: YES. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +PDF_HYPERLINKS = YES + +# If the USE_PDFLATEX tag is set to YES, doxygen will use pdflatex to generate +# the PDF file directly from the LaTeX files. Set this option to YES, to get a +# higher quality PDF documentation. +# The default value is: YES. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +USE_PDFLATEX = YES + +# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \batchmode +# command to the generated LaTeX files. This will instruct LaTeX to keep running +# if errors occur, instead of asking the user for help. This option is also used +# when generating formulas in HTML. +# The default value is: NO. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_BATCHMODE = NO + +# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include the +# index chapters (such as File Index, Compound Index, etc.) in the output. +# The default value is: NO. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_HIDE_INDICES = NO + +# If the LATEX_SOURCE_CODE tag is set to YES then doxygen will include source +# code with syntax highlighting in the LaTeX output. +# +# Note that which sources are shown also depends on other settings such as +# SOURCE_BROWSER. +# The default value is: NO. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_SOURCE_CODE = NO + +# The LATEX_BIB_STYLE tag can be used to specify the style to use for the +# bibliography, e.g. plainnat, or ieeetr. See +# http://en.wikipedia.org/wiki/BibTeX and \cite for more info. +# The default value is: plain. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_BIB_STYLE = plain + +# If the LATEX_TIMESTAMP tag is set to YES then the footer of each generated +# page will contain the date and time when the page was generated. Setting this +# to NO can help when comparing the output of multiple runs. +# The default value is: NO. +# This tag requires that the tag GENERATE_LATEX is set to YES. + +LATEX_TIMESTAMP = NO + +#--------------------------------------------------------------------------- +# Configuration options related to the RTF output +#--------------------------------------------------------------------------- + +# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. The +# RTF output is optimized for Word 97 and may not look too pretty with other RTF +# readers/editors. +# The default value is: NO. + +GENERATE_RTF = NO + +# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a +# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of +# it. +# The default directory is: rtf. +# This tag requires that the tag GENERATE_RTF is set to YES. + +RTF_OUTPUT = rtf + +# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF +# documents. This may be useful for small projects and may help to save some +# trees in general. +# The default value is: NO. +# This tag requires that the tag GENERATE_RTF is set to YES. + +COMPACT_RTF = NO + +# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will +# contain hyperlink fields. The RTF file will contain links (just like the HTML +# output) instead of page references. This makes the output suitable for online +# browsing using Word or some other Word compatible readers that support those +# fields. +# +# Note: WordPad (write) and others do not support links. +# The default value is: NO. +# This tag requires that the tag GENERATE_RTF is set to YES. + +RTF_HYPERLINKS = NO + +# Load stylesheet definitions from file. Syntax is similar to doxygen's config +# file, i.e. a series of assignments. You only have to provide replacements, +# missing definitions are set to their default value. +# +# See also section "Doxygen usage" for information on how to generate the +# default style sheet that doxygen normally uses. +# This tag requires that the tag GENERATE_RTF is set to YES. + +RTF_STYLESHEET_FILE = + +# Set optional variables used in the generation of an RTF document. Syntax is +# similar to doxygen's config file. A template extensions file can be generated +# using doxygen -e rtf extensionFile. +# This tag requires that the tag GENERATE_RTF is set to YES. + +RTF_EXTENSIONS_FILE = + +# If the RTF_SOURCE_CODE tag is set to YES then doxygen will include source code +# with syntax highlighting in the RTF output. +# +# Note that which sources are shown also depends on other settings such as +# SOURCE_BROWSER. +# The default value is: NO. +# This tag requires that the tag GENERATE_RTF is set to YES. + +RTF_SOURCE_CODE = NO + +#--------------------------------------------------------------------------- +# Configuration options related to the man page output +#--------------------------------------------------------------------------- + +# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for +# classes and files. +# The default value is: NO. + +GENERATE_MAN = NO + +# The MAN_OUTPUT tag is used to specify where the man pages will be put. If a +# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of +# it. A directory man3 will be created inside the directory specified by +# MAN_OUTPUT. +# The default directory is: man. +# This tag requires that the tag GENERATE_MAN is set to YES. + +MAN_OUTPUT = man + +# The MAN_EXTENSION tag determines the extension that is added to the generated +# man pages. In case the manual section does not start with a number, the number +# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is +# optional. +# The default value is: .3. +# This tag requires that the tag GENERATE_MAN is set to YES. + +MAN_EXTENSION = .3 + +# The MAN_SUBDIR tag determines the name of the directory created within +# MAN_OUTPUT in which the man pages are placed. If defaults to man followed by +# MAN_EXTENSION with the initial . removed. +# This tag requires that the tag GENERATE_MAN is set to YES. + +MAN_SUBDIR = + +# If the MAN_LINKS tag is set to YES and doxygen generates man output, then it +# will generate one additional man file for each entity documented in the real +# man page(s). These additional files only source the real man page, but without +# them the man command would be unable to find the correct page. +# The default value is: NO. +# This tag requires that the tag GENERATE_MAN is set to YES. + +MAN_LINKS = NO + +#--------------------------------------------------------------------------- +# Configuration options related to the XML output +#--------------------------------------------------------------------------- + +# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file that +# captures the structure of the code including all documentation. +# The default value is: NO. + +GENERATE_XML = NO + +# The XML_OUTPUT tag is used to specify where the XML pages will be put. If a +# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of +# it. +# The default directory is: xml. +# This tag requires that the tag GENERATE_XML is set to YES. + +XML_OUTPUT = xml + +# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program +# listings (including syntax highlighting and cross-referencing information) to +# the XML output. Note that enabling this will significantly increase the size +# of the XML output. +# The default value is: YES. +# This tag requires that the tag GENERATE_XML is set to YES. + +XML_PROGRAMLISTING = YES + +#--------------------------------------------------------------------------- +# Configuration options related to the DOCBOOK output +#--------------------------------------------------------------------------- + +# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook files +# that can be used to generate PDF. +# The default value is: NO. + +GENERATE_DOCBOOK = NO + +# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be put. +# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in +# front of it. +# The default directory is: docbook. +# This tag requires that the tag GENERATE_DOCBOOK is set to YES. + +DOCBOOK_OUTPUT = docbook + +# If the DOCBOOK_PROGRAMLISTING tag is set to YES, doxygen will include the +# program listings (including syntax highlighting and cross-referencing +# information) to the DOCBOOK output. Note that enabling this will significantly +# increase the size of the DOCBOOK output. +# The default value is: NO. +# This tag requires that the tag GENERATE_DOCBOOK is set to YES. + +DOCBOOK_PROGRAMLISTING = NO + +#--------------------------------------------------------------------------- +# Configuration options for the AutoGen Definitions output +#--------------------------------------------------------------------------- + +# If the GENERATE_AUTOGEN_DEF tag is set to YES, doxygen will generate an +# AutoGen Definitions (see http://autogen.sf.net) file that captures the +# structure of the code including all documentation. Note that this feature is +# still experimental and incomplete at the moment. +# The default value is: NO. + +GENERATE_AUTOGEN_DEF = NO + +#--------------------------------------------------------------------------- +# Configuration options related to the Perl module output +#--------------------------------------------------------------------------- + +# If the GENERATE_PERLMOD tag is set to YES, doxygen will generate a Perl module +# file that captures the structure of the code including all documentation. +# +# Note that this feature is still experimental and incomplete at the moment. +# The default value is: NO. + +GENERATE_PERLMOD = NO + +# If the PERLMOD_LATEX tag is set to YES, doxygen will generate the necessary +# Makefile rules, Perl scripts and LaTeX code to be able to generate PDF and DVI +# output from the Perl module output. +# The default value is: NO. +# This tag requires that the tag GENERATE_PERLMOD is set to YES. + +PERLMOD_LATEX = NO + +# If the PERLMOD_PRETTY tag is set to YES, the Perl module output will be nicely +# formatted so it can be parsed by a human reader. This is useful if you want to +# understand what is going on. On the other hand, if this tag is set to NO, the +# size of the Perl module output will be much smaller and Perl will parse it +# just the same. +# The default value is: YES. +# This tag requires that the tag GENERATE_PERLMOD is set to YES. + +PERLMOD_PRETTY = YES + +# The names of the make variables in the generated doxyrules.make file are +# prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. This is useful +# so different doxyrules.make files included by the same Makefile don't +# overwrite each other's variables. +# This tag requires that the tag GENERATE_PERLMOD is set to YES. + +PERLMOD_MAKEVAR_PREFIX = + +#--------------------------------------------------------------------------- +# Configuration options related to the preprocessor +#--------------------------------------------------------------------------- + +# If the ENABLE_PREPROCESSING tag is set to YES, doxygen will evaluate all +# C-preprocessor directives found in the sources and include files. +# The default value is: YES. + +ENABLE_PREPROCESSING = YES + +# If the MACRO_EXPANSION tag is set to YES, doxygen will expand all macro names +# in the source code. If set to NO, only conditional compilation will be +# performed. Macro expansion can be done in a controlled way by setting +# EXPAND_ONLY_PREDEF to YES. +# The default value is: NO. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +MACRO_EXPANSION = NO + +# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then +# the macro expansion is limited to the macros specified with the PREDEFINED and +# EXPAND_AS_DEFINED tags. +# The default value is: NO. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +EXPAND_ONLY_PREDEF = NO + +# If the SEARCH_INCLUDES tag is set to YES, the include files in the +# INCLUDE_PATH will be searched if a #include is found. +# The default value is: YES. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +SEARCH_INCLUDES = YES + +# The INCLUDE_PATH tag can be used to specify one or more directories that +# contain include files that are not input files but should be processed by the +# preprocessor. +# This tag requires that the tag SEARCH_INCLUDES is set to YES. + +INCLUDE_PATH = + +# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard +# patterns (like *.h and *.hpp) to filter out the header-files in the +# directories. If left blank, the patterns specified with FILE_PATTERNS will be +# used. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +INCLUDE_FILE_PATTERNS = + +# The PREDEFINED tag can be used to specify one or more macro names that are +# defined before the preprocessor is started (similar to the -D option of e.g. +# gcc). The argument of the tag is a list of macros of the form: name or +# name=definition (no spaces). If the definition and the "=" are omitted, "=1" +# is assumed. To prevent a macro definition from being undefined via #undef or +# recursively expanded use the := operator instead of the = operator. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +PREDEFINED = + +# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this +# tag can be used to specify a list of macro names that should be expanded. The +# macro definition that is found in the sources will be used. Use the PREDEFINED +# tag if you want to use a different macro definition that overrules the +# definition found in the source code. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +EXPAND_AS_DEFINED = + +# If the SKIP_FUNCTION_MACROS tag is set to YES then doxygen's preprocessor will +# remove all references to function-like macros that are alone on a line, have +# an all uppercase name, and do not end with a semicolon. Such function macros +# are typically used for boiler-plate code, and will confuse the parser if not +# removed. +# The default value is: YES. +# This tag requires that the tag ENABLE_PREPROCESSING is set to YES. + +SKIP_FUNCTION_MACROS = YES + +#--------------------------------------------------------------------------- +# Configuration options related to external references +#--------------------------------------------------------------------------- + +# The TAGFILES tag can be used to specify one or more tag files. For each tag +# file the location of the external documentation should be added. The format of +# a tag file without this location is as follows: +# TAGFILES = file1 file2 ... +# Adding location for the tag files is done as follows: +# TAGFILES = file1=loc1 "file2 = loc2" ... +# where loc1 and loc2 can be relative or absolute paths or URLs. See the +# section "Linking to external documentation" for more information about the use +# of tag files. +# Note: Each tag file must have a unique name (where the name does NOT include +# the path). If a tag file is not located in the directory in which doxygen is +# run, you must also specify the path to the tagfile here. + +TAGFILES = + +# When a file name is specified after GENERATE_TAGFILE, doxygen will create a +# tag file that is based on the input files it reads. See section "Linking to +# external documentation" for more information about the usage of tag files. + +GENERATE_TAGFILE = + +# If the ALLEXTERNALS tag is set to YES, all external class will be listed in +# the class index. If set to NO, only the inherited external classes will be +# listed. +# The default value is: NO. + +ALLEXTERNALS = NO + +# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be listed +# in the modules index. If set to NO, only the current project's groups will be +# listed. +# The default value is: YES. + +EXTERNAL_GROUPS = YES + +# If the EXTERNAL_PAGES tag is set to YES, all external pages will be listed in +# the related pages index. If set to NO, only the current project's pages will +# be listed. +# The default value is: YES. + +EXTERNAL_PAGES = YES + +# The PERL_PATH should be the absolute path and name of the perl script +# interpreter (i.e. the result of 'which perl'). +# The default file (with absolute path) is: /usr/bin/perl. + +PERL_PATH = /usr/bin/perl + +#--------------------------------------------------------------------------- +# Configuration options related to the dot tool +#--------------------------------------------------------------------------- + +# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class diagram +# (in HTML and LaTeX) for classes with base or super classes. Setting the tag to +# NO turns the diagrams off. Note that this option also works with HAVE_DOT +# disabled, but it is recommended to install and use dot, since it yields more +# powerful graphs. +# The default value is: YES. + +CLASS_DIAGRAMS = YES + +# You can define message sequence charts within doxygen comments using the \msc +# command. Doxygen will then run the mscgen tool (see: +# http://www.mcternan.me.uk/mscgen/)) to produce the chart and insert it in the +# documentation. The MSCGEN_PATH tag allows you to specify the directory where +# the mscgen tool resides. If left empty the tool is assumed to be found in the +# default search path. + +MSCGEN_PATH = + +# You can include diagrams made with dia in doxygen documentation. Doxygen will +# then run dia to produce the diagram and insert it in the documentation. The +# DIA_PATH tag allows you to specify the directory where the dia binary resides. +# If left empty dia is assumed to be found in the default search path. + +DIA_PATH = + +# If set to YES the inheritance and collaboration graphs will hide inheritance +# and usage relations if the target is undocumented or is not a class. +# The default value is: YES. + +HIDE_UNDOC_RELATIONS = YES + +# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is +# available from the path. This tool is part of Graphviz (see: +# http://www.graphviz.org/), a graph visualization toolkit from AT&T and Lucent +# Bell Labs. The other options in this section have no effect if this option is +# set to NO +# The default value is: NO. + +HAVE_DOT = NO + +# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed +# to run in parallel. When set to 0 doxygen will base this on the number of +# processors available in the system. You can set it explicitly to a value +# larger than 0 to get control over the balance between CPU load and processing +# speed. +# Minimum value: 0, maximum value: 32, default value: 0. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_NUM_THREADS = 0 + +# When you want a differently looking font in the dot files that doxygen +# generates you can specify the font name using DOT_FONTNAME. You need to make +# sure dot is able to find the font, which can be done by putting it in a +# standard location or by setting the DOTFONTPATH environment variable or by +# setting DOT_FONTPATH to the directory containing the font. +# The default value is: Helvetica. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_FONTNAME = Helvetica + +# The DOT_FONTSIZE tag can be used to set the size (in points) of the font of +# dot graphs. +# Minimum value: 4, maximum value: 24, default value: 10. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_FONTSIZE = 10 + +# By default doxygen will tell dot to use the default font as specified with +# DOT_FONTNAME. If you specify a different font using DOT_FONTNAME you can set +# the path where dot can find it using this tag. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_FONTPATH = + +# If the CLASS_GRAPH tag is set to YES then doxygen will generate a graph for +# each documented class showing the direct and indirect inheritance relations. +# Setting this tag to YES will force the CLASS_DIAGRAMS tag to NO. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +CLASS_GRAPH = YES + +# If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a +# graph for each documented class showing the direct and indirect implementation +# dependencies (inheritance, containment, and class references variables) of the +# class with other documented classes. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +COLLABORATION_GRAPH = YES + +# If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph for +# groups, showing the direct groups dependencies. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +GROUP_GRAPHS = YES + +# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and +# collaboration diagrams in a style similar to the OMG's Unified Modeling +# Language. +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +UML_LOOK = NO + +# If the UML_LOOK tag is enabled, the fields and methods are shown inside the +# class node. If there are many fields or methods and many nodes the graph may +# become too big to be useful. The UML_LIMIT_NUM_FIELDS threshold limits the +# number of items for each type to make the size more manageable. Set this to 0 +# for no limit. Note that the threshold may be exceeded by 50% before the limit +# is enforced. So when you set the threshold to 10, up to 15 fields may appear, +# but if the number exceeds 15, the total amount of fields shown is limited to +# 10. +# Minimum value: 0, maximum value: 100, default value: 10. +# This tag requires that the tag HAVE_DOT is set to YES. + +UML_LIMIT_NUM_FIELDS = 10 + +# If the TEMPLATE_RELATIONS tag is set to YES then the inheritance and +# collaboration graphs will show the relations between templates and their +# instances. +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +TEMPLATE_RELATIONS = NO + +# If the INCLUDE_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are set to +# YES then doxygen will generate a graph for each documented file showing the +# direct and indirect include dependencies of the file with other documented +# files. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +INCLUDE_GRAPH = YES + +# If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are +# set to YES then doxygen will generate a graph for each documented file showing +# the direct and indirect include dependencies of the file with other documented +# files. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +INCLUDED_BY_GRAPH = YES + +# If the CALL_GRAPH tag is set to YES then doxygen will generate a call +# dependency graph for every global function or class method. +# +# Note that enabling this option will significantly increase the time of a run. +# So in most cases it will be better to enable call graphs for selected +# functions only using the \callgraph command. Disabling a call graph can be +# accomplished by means of the command \hidecallgraph. +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +CALL_GRAPH = NO + +# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller +# dependency graph for every global function or class method. +# +# Note that enabling this option will significantly increase the time of a run. +# So in most cases it will be better to enable caller graphs for selected +# functions only using the \callergraph command. Disabling a caller graph can be +# accomplished by means of the command \hidecallergraph. +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +CALLER_GRAPH = NO + +# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical +# hierarchy of all classes instead of a textual one. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +GRAPHICAL_HIERARCHY = YES + +# If the DIRECTORY_GRAPH tag is set to YES then doxygen will show the +# dependencies a directory has on other directories in a graphical way. The +# dependency relations are determined by the #include relations between the +# files in the directories. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +DIRECTORY_GRAPH = YES + +# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images +# generated by dot. For an explanation of the image formats see the section +# output formats in the documentation of the dot tool (Graphviz (see: +# http://www.graphviz.org/)). +# Note: If you choose svg you need to set HTML_FILE_EXTENSION to xhtml in order +# to make the SVG files visible in IE 9+ (other browsers do not have this +# requirement). +# Possible values are: png, jpg, gif, svg, png:gd, png:gd:gd, png:cairo, +# png:cairo:gd, png:cairo:cairo, png:cairo:gdiplus, png:gdiplus and +# png:gdiplus:gdiplus. +# The default value is: png. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_IMAGE_FORMAT = png + +# If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to +# enable generation of interactive SVG images that allow zooming and panning. +# +# Note that this requires a modern browser other than Internet Explorer. Tested +# and working are Firefox, Chrome, Safari, and Opera. +# Note: For IE 9+ you need to set HTML_FILE_EXTENSION to xhtml in order to make +# the SVG files visible. Older versions of IE do not have SVG support. +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +INTERACTIVE_SVG = NO + +# The DOT_PATH tag can be used to specify the path where the dot tool can be +# found. If left blank, it is assumed the dot tool can be found in the path. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_PATH = + +# The DOTFILE_DIRS tag can be used to specify one or more directories that +# contain dot files that are included in the documentation (see the \dotfile +# command). +# This tag requires that the tag HAVE_DOT is set to YES. + +DOTFILE_DIRS = + +# The MSCFILE_DIRS tag can be used to specify one or more directories that +# contain msc files that are included in the documentation (see the \mscfile +# command). + +MSCFILE_DIRS = + +# The DIAFILE_DIRS tag can be used to specify one or more directories that +# contain dia files that are included in the documentation (see the \diafile +# command). + +DIAFILE_DIRS = + +# When using plantuml, the PLANTUML_JAR_PATH tag should be used to specify the +# path where java can find the plantuml.jar file. If left blank, it is assumed +# PlantUML is not used or called during a preprocessing step. Doxygen will +# generate a warning when it encounters a \startuml command in this case and +# will not generate output for the diagram. + +PLANTUML_JAR_PATH = + +# When using plantuml, the specified paths are searched for files specified by +# the !include statement in a plantuml block. + +PLANTUML_INCLUDE_PATH = + +# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of nodes +# that will be shown in the graph. If the number of nodes in a graph becomes +# larger than this value, doxygen will truncate the graph, which is visualized +# by representing a node as a red box. Note that doxygen if the number of direct +# children of the root node in a graph is already larger than +# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note that +# the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH. +# Minimum value: 0, maximum value: 10000, default value: 50. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_GRAPH_MAX_NODES = 50 + +# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the graphs +# generated by dot. A depth value of 3 means that only nodes reachable from the +# root by following a path via at most 3 edges will be shown. Nodes that lay +# further from the root node will be omitted. Note that setting this option to 1 +# or 2 may greatly reduce the computation time needed for large code bases. Also +# note that the size of a graph can be further restricted by +# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction. +# Minimum value: 0, maximum value: 1000, default value: 0. +# This tag requires that the tag HAVE_DOT is set to YES. + +MAX_DOT_GRAPH_DEPTH = 0 + +# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent +# background. This is disabled by default, because dot on Windows does not seem +# to support this out of the box. +# +# Warning: Depending on the platform used, enabling this option may lead to +# badly anti-aliased labels on the edges of a graph (i.e. they become hard to +# read). +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_TRANSPARENT = NO + +# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output +# files in one run (i.e. multiple -o and -T options on the command line). This +# makes dot run faster, but since only newer versions of dot (>1.8.10) support +# this, this feature is disabled by default. +# The default value is: NO. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_MULTI_TARGETS = NO + +# If the GENERATE_LEGEND tag is set to YES doxygen will generate a legend page +# explaining the meaning of the various boxes and arrows in the dot generated +# graphs. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +GENERATE_LEGEND = YES + +# If the DOT_CLEANUP tag is set to YES, doxygen will remove the intermediate dot +# files that are used to generate the various graphs. +# The default value is: YES. +# This tag requires that the tag HAVE_DOT is set to YES. + +DOT_CLEANUP = YES @@ -0,0 +1,21 @@ +MIT License + +Copyright 2019-2021 Chris Hiszpanski + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..e935715 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,5 @@ +# custom m4 macros within m4/ subdirectory +ACLOCAL_AMFLAGS = -I m4 --install + +# library source, examples, and unit tests +SUBDIRS = src examples tests @@ -0,0 +1,109 @@ +liburtc +======= + +Real-time communication for microcontrollers + +The WebRTC reference implementation was designed for web browsers, namely +Chromium. It requires specialized build tools, over 10GB of disk space for +source code, and produces a binary with a large footprint. liburtc, on the +other hand, is designed with the following goals in mind: + +* Small footprint. Under 100KB. +* Portable. Implemented in C (C99) and works on nearly any architecture and + POSIX.1-2001 compliant operating system. +* Easy to use. Straight-forward to compile and integrate into your code. +* Standards compliant. Adheres to IETF specs to ensure interoperability. +* Minimal. Only implements subset of protocols required for basic functionality + for common embedded applications, such as smart cameras. +* Minimal dependencies. Only dependency is OpenSSL. + + +Bootstrapping +------------- + +If checking out this code via `git`, run `autoconf` to generate a `configure` +script. + + +Quickstart +---------- + +To compile the library and usage example from source, you will need autoconf, +automake, and libtool. Use `autogen.sh` to create a `configure` script for +configuring and making the library: + + ./autogen.sh && ./configure && make + +To test the library: + + make check + +Next, see `example/README.md` for running a demo. + + +Features +-------- + +- Autotools based build process +- POSIX.1-2001 compliant implementation + +/ sdp +/ stun client +- ice agent (state machine) + - aes cbc encipher / decipher (openssl) +- v4l2 +- libx264 +- libopus +- dtls (openssl?) +- srtp + +- ANSI C compliant implementation (C99) +- BSD sockets (winsock not supported) + +- Session Description Protocol (SDP) + - SHA-256 certificate fingerprint + +- Interactive Connectivity Establishment (ICE) agent + - STUN: RFC 5389 compliant client (no server capability) + - TURN: RFC 5766 compliant client (no server capability) + +- DTLS-SRTP transport + - RFC 5764 compliant implementation (using OpenSSL) + +- Video codecs: + - H.264 + - Profiles: baseline, constrained baseline, main, high + - Levels: 3.1 and up + - H.265 not supported (few, if any, browsers support this) + - VP8/9 not supported (few embedded devices support this) + +- Video sources: + - Video4Linux2 + - USB Video Class + +- Audio codecs: + - G.711 + - Opus + +- Audio sources: + - ALSA + - PulseAudio + + +Possible Future Improvements +---------------------------- + +- seamless handoff between network interfaces (e.g. cellular and wifi) + +Notes +----- + +- A thread is used per peer connection. Each thread asynchronously handles + i/o events. + + +Credits +------- + +- Diego Elio Petteno (https://autotools.io) for the wonderful resource on + autoconf, automake, libtool, and other tools in the autotools suite. diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..9b6b39f --- /dev/null +++ b/autogen.sh @@ -0,0 +1,3 @@ +#!/bin/sh + +autoreconf -fiv diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..c6a74a3 --- /dev/null +++ b/configure.ac @@ -0,0 +1,23 @@ +AC_INIT([liburtc], [1.0.0], [chris@hiszpanski.name]) + +# custom m4 macros within m4/ subdirectory +AC_CONFIG_MACRO_DIR([m4]) + +AM_INIT_AUTOMAKE([-Wall -Werror foreign no-dependencies subdir-objects]) +AC_PROG_CC +AC_CONFIG_HEADERS([config.h]) +AC_CONFIG_LIBOBJ_DIR([src]) + +# for pthread support on linux +AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])]) + +AM_PROG_AR +LT_INIT + +AC_CONFIG_FILES([ + Makefile + examples/Makefile + src/Makefile + tests/Makefile +]) +AC_OUTPUT diff --git a/examples/.gitignore b/examples/.gitignore new file mode 100644 index 0000000..b04600a --- /dev/null +++ b/examples/.gitignore @@ -0,0 +1 @@ +sandbox diff --git a/examples/Makefile.am b/examples/Makefile.am new file mode 100644 index 0000000..f2e28b1 --- /dev/null +++ b/examples/Makefile.am @@ -0,0 +1,11 @@ +# Builds a minimal example program +#bin_PROGRAMS = example +#example_CFLAGS = -I$(top_srcdir)/src/include $(LWS_CFLAGS) +#example_LDADD = $(top_builddir)/src/liburtc.la $(LWS_LIBS) +#example_SOURCES = server.c + +# Builds a minimal example program +bin_PROGRAMS = sandbox +sandbox_CFLAGS = -I$(top_srcdir)/src +sandbox_LDADD = $(top_builddir)/src/liburtc.la +sandbox_SOURCES = sandbox.c diff --git a/examples/sandbox.c b/examples/sandbox.c new file mode 100644 index 0000000..2f3728d --- /dev/null +++ b/examples/sandbox.c @@ -0,0 +1,33 @@ +#include <signal.h> +#include <unistd.h> + +#include "mdns.h" +#include "urtc.h" + + +int main() { + sigset_t ss; + int signal; + + const char *stun[] = { + "stun.l.google.com:19302", + "stun2.l.google.com:19302", + NULL + }; + + sigemptyset(&ss); + sigaddset(&ss, SIGINT); + sigaddset(&ss, SIGTERM); + sigaddset(&ss, SIGQUIT); + + urtc_peerconn_t *pc = urtc_peerconn_create(stun); + + // query for raspberry.local + mdns_query("raspberry"); + + sigwait(&ss, &signal); + + urtc_peerconn_destroy(pc); + + return 0; +} diff --git a/include/config.h b/include/config.h new file mode 100644 index 0000000..a003218 --- /dev/null +++ b/include/config.h @@ -0,0 +1,46 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_CONFIG_H +#define URTC_CONFIG_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "ice.h" + +/* Peer connection configuration */ +typedef struct urtc_config { + urtc_ice_server_t ice_servers[ICE_MAX_SERVERS]; + + // TODO video_source_t *vsrc; + // TODO video_sink_t *vsnk; + + // TODO audio_source_t *asrc; + // TODO audio_sink_t *asnk; + + // TODO data_source_t *dsrc; + // TODO data_sink_t *dsnk; +} urtc_config_t; + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_CONFIG_H */ diff --git a/include/ice.h b/include/ice.h new file mode 100644 index 0000000..8b7251f --- /dev/null +++ b/include/ice.h @@ -0,0 +1,129 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_ICE_H +#define URTC_ICE_H + +#include <pthread.h> +#include <stdbool.h> +#include <stdint.h> + +#include <sys/select.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* Maximum number of ICE bases. Each network interface address is a base. */ +#define ICE_MAX_BASES 16 + +/* Maximum number of supported ICE (i.e. STUN or TURN) servers */ +#define ICE_MAX_SERVERS 16 + + +///////////////////////////// TYPE DEFINITIONS ///////////////////////////// + +// STUN or TURN server +typedef struct { + char *url; + char *username; /* ignored for stun urls */ + char *credential; /* ignored for stun urls */ +} urtc_ice_server_t; + +// ICE base +typedef struct { +} ice_base_t; + +// ICE component +typedef enum { + ICE_COMPONENT_NULL = 0, + ICE_COMPONENT_RTP, + ICE_COMPONENT_RTCP +} ice_component_t; + +// ICE candidate +typedef struct { + ice_component_t component; + uint16_t port; + uint32_t priority; +} ice_candidate_t; + +typedef struct { + ice_candidate_t local; + ice_candidate_t remote; +} ice_candidate_pair_t; + +// See https://tools.ietf.org/html/rfc8445#section-6.1.2.1 +typedef enum { + CHECKLIST_STATE_RUNNING = 0, + CHECKLIST_STATE_COMPLETED, + CHECKLIST_STATE_FAILED +} ice_checklist_state_t; + +typedef struct { + ice_checklist_state_t state; +} ice_checklist_t; + +// ICE agent object +typedef struct { + pthread_t thread; + ice_checklist_t checklist; + ice_base_t bases[ICE_MAX_BASES]; + + int nfds; + fd_set readfds; + fd_set writefds; + fd_set errorfds; + + struct timeval ta; + + bool cancelled; +} ice_agent_t; + + +/////////////////////////// FORWARD DECLARATIONS /////////////////////////// + +/** + * Create new ICE agent + * + * Each agent creates a separate thread for processing network i/o events. + * + * \param agent[out] Pointer to agent object pointer + * + * \return 0 on success. Negative on error. + */ +int ice_agent_create(ice_agent_t **agent); + +/** + * Destroy ICE agent + * + * Stops agent thread (if running) and frees memory. + * + * \param agent[in] Pointer to agent object + * + * \return 0 on success. Negative on error. + */ +int ice_agent_destroy(ice_agent_t *agent); + +int ice_gather_host_candidates(); + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_ICE_H */ diff --git a/include/peerconn.h b/include/peerconn.h new file mode 100644 index 0000000..feecc0e --- /dev/null +++ b/include/peerconn.h @@ -0,0 +1,140 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_PEERCONN_H +#define URTC_PEERCONN_H + +#include "config.h" +#include "ice.h" +#include "sdp.h" +#include "runloop.h" + +#ifdef __cplusplus +extern "C" { +#endif + + +/**************************** TYPE DEFINITIONS ****************************/ + +// Event callback function type. Takes and returns void pointers. +typedef void *(*event_callback_t)(void *arg); + +// Peer connection +typedef struct urtc_peerconn { + uint8_t n; + + // Interactive connectivity establishment agent + ice_agent_t *agent; + + // Local and remote session descriptions + urtc_sdp_t *ldesc; + urtc_sdp_t *rdesc; + + // Event callbacks + void (*onIceCandidate)(const char *cand, void *arg); + void (*onIceGatheringStateChange)(int state); + void (*onIceConnectionStateChange)(int state); + void (*onSignalingStateChange)(int state); + void (*onTrack)(int track); + + // Run loop for event handling + runloop_t runloop; +} urtc_peerconn_t; + + +/************************** FORWARD DECLARATIONS **************************/ + +/** + * Create a new peer connection. + * + * \param pc[out] New peer connection. + * \param cfg[in] Peer connection configuration. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_create(urtc_peerconn_t **pc, const urtc_config_t *cfg); + +/** + * Adds received ICE candidate to ICE agent. + * + * If `cand` is a NULL pointer or empty string, it signals that all remote + * candidates have been delivered (i.e. end-of-candidates). + * + * \param pc[in] Peer connection. + * \param cand[in] ICE candidate. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_add_ice_candidate(urtc_peerconn_t *pc, const char *cand); + +/** + * Set remote description. + * + * \param pc[in] Peer connection. + * \param desc[in] Session description protocol string. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_set_remote_description(urtc_peerconn_t *pc, const char *desc); + +/** + * Set local description. + * + * \param pc[in] Peer connection. + * \param desc[in] Session description protocol string. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_set_local_description(urtc_peerconn_t *pc, const char *desc); + +/** + * Create offer. + * + * \param pc[in] Peer connection. + * \param offer[out] Session description to send to remote peer. Caller must + * free. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_create_offer(urtc_peerconn_t *pc, char **offer); + +/** + * Create answer. + * + * \param pc[in] Peer connection + * \param answer[out] Session description to send to remote peer. Caller must + * free. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_create_answer(urtc_peerconn_t *pc, char **answer); + +/** + * Teardown a peer connection. + * + * \param pc[in] Peer connection. + * + * \return 0 on success. Negative on error. + */ +int urtc_peerconn_destroy(urtc_peerconn_t *pc); + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_PEERCONN_H */ diff --git a/include/runloop.h b/include/runloop.h new file mode 100644 index 0000000..ea840e7 --- /dev/null +++ b/include/runloop.h @@ -0,0 +1,111 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +/** + * @file runloop.h + * Event loop + * A more elaborate file description. + */ + +#ifndef URTC_RUNLOOP_H +#define URTC_RUNLOOP_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <poll.h> +#include <pthread.h> +#include <stdbool.h> + +typedef void *(*callback_t)(int fd, void *arg); + +typedef struct { + // File descriptor sets for poll(). + struct pollfd *fds; + nfds_t nfds; + + // Callback array. Index into array is file descriptor. + callback_t *callbacks; + void **args; + + // Pipe for aborting blocked poll(). Allows dynamic adds/removes. + int abortpipe[2]; + bool done; + + // Run loop thread ID + pthread_t tid; +} runloop_t; + +/** + * Create a new run loop + * + * Each run loop creates a separate thread which then repeatedly poll()s + * for events. Upon receiving an event, the run loop calls the respective + * file descriptor's callback function. + * + * @param[out] rl Pointer to run loop struct + */ +int urtc__runloop_create(runloop_t *rl); + +/** + * Add file descriptor to run loop + * + * @param rl Run loop + * @param fd File descriptor + * @param events Events to monitor (see struct pollfd) + * @param cb Callback to run on activity + * @param arg User-specified argument to pass to callback + * + * @return Zero on success. Negative on error. + */ +int urtc__runloop_add( + runloop_t *rl, + int fd, + short events, + void *(*cb)(int fd, void *arg), + void *arg +); + +/** + * Remove a file descriptor from the run loop. No more events will be + * processed for this file descriptor. + * + * @param rl Run loop. + * @param fd File descriptor. + * + * @return Zero on success. Negative on error. + */ +int urtc__runloop_remove(runloop_t *rl, int fd); + +int urtc__runloop_join(runloop_t *rl); + +/** + * Destroy a run loop + * + * @param rl Pointer to run loop object + * + * @return Zero on success; negative on error. On error, errno is set. + */ +int urtc__runloop_destroy(runloop_t *rl); + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_RUNLOOP_H */ diff --git a/include/str.h b/include/str.h new file mode 100644 index 0000000..f0164d3 --- /dev/null +++ b/include/str.h @@ -0,0 +1,34 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_STR_H +#define URTC_STR_H + +#include <stddef.h> + +typedef struct { + char *string; + size_t length; + size_t capacity; +} str_t; + +str_t str_create_empty(size_t capacity); +str_t str_append(const str_t str, const char *c_str); +void str_destroy(str_t s); + +#endif diff --git a/include/stun.h b/include/stun.h new file mode 100644 index 0000000..126e7f5 --- /dev/null +++ b/include/stun.h @@ -0,0 +1,134 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_STUN_H +#define URTC_STUN_H + +#include <stdint.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#define SIZEOF_STUN_HDR 20 + +// STUN Classes +#define STUN_CLASS_REQUEST 0 +#define STUN_CLASS_INDICTATION 1 +#define STUN_CLASS_SUCCESS 2 +#define STUN_CLASS_ERROR 3 + +// STUN Methods +#define STUN_METHOD_RESERVED 0 +#define STUN_METHOD_BINDING 1 + + +///////////////////////////// TYPE DEFINITIONS ///////////////////////////// + +typedef struct { + int rc; // Retransmission count + int rto; // Retransmission timeout (in ms) + int sockfd; // Socket file descriptor +} stun_client_t; + +typedef struct { + char *server; +} stun_client_config_t; + +// STUN Message Header +typedef struct __attribute__((__packed__)) { + uint16_t reserved:2; // Upper two bits are 0 + uint16_t type:14; // 14-bit type + uint16_t msglen; // Message length + uint32_t cookie; // Magic cookie + uint8_t txid[12]; // Transaction ID +} stun_msg_hdr_t; + +// STUN Attribute +typedef struct { + uint16_t type; // Attribute type + uint16_t len; // Value length, prior to padding + uint8_t *val; // Pointer to attribute value +} stun_attr_t; + +// STUN Attribute: MAPPED-ADDRESS +typedef struct __attribute__((__packed__)) { + uint8_t reserved; + uint8_t family; + uint16_t port; + union { + uint8_t ipv4[4]; // IPv4 address is 32-bits + uint8_t ipv6[16]; // IPv6 address is 128-bits + }; +} stun_attr_mapped_address_t; + +// STUN Attribute: XOR-MAPPED-ADDRESS +typedef stun_attr_mapped_address_t stun_attr_xor_mapped_address_t; + +// STUN Attribute: USERNAME + + +////////////////////////////////// MACROS ////////////////////////////////// + +// Get class from message header type +#define CLASS(typ) (((typ >> 7) & 0x2) | ((typ >> 4) & 0x1)) + +// Get method from message header type +#define METHOD(typ) (((typ >> 2) & 0xF80) | ((typ >> 1) & 0x70) | (typ & 0xF)) + +#define TYPE(cls, mthd) ( \ + ((mthd & 0xF80) << 2) | \ + ((cls & 0x2) << 7) | \ + ((mthd & 0x70) << 1) | \ + ((cls & 0x1) << 4) | \ + (mthd & 0xF) \ +) + + +/////////////////////////// FORWARD DECLARATIONS /////////////////////////// + +/** + * (callback) Binding request response handler + * + * @param[in] name + * @param[in] arg User argument + */ +typedef void (*stun_client_binding_response_callback)( + const char *name, + void *arg +); + +/** + * Sends a STUN binding request to the specified server + * + * @param[in] srv Server (hostname or IP address) + * @param[in] cb Handler to call when a response is received + * @param[in] arg Optional user argument to pass to callback + */ +err_t stun_client_binding_request( + runloop_t *rl, + const char *srv, + stun_client_binding_response_callback cb, + void *arg +); + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_STUN_H */ diff --git a/include/urtc.h b/include/urtc.h new file mode 100644 index 0000000..3eabba0 --- /dev/null +++ b/include/urtc.h @@ -0,0 +1,34 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_H +#define URTC_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "config.h" +#include "err.h" +#include "peerconn.h" + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_H */ diff --git a/include/urtc/opts.h b/include/urtc/opts.h new file mode 100644 index 0000000..7e5200b --- /dev/null +++ b/include/urtc/opts.h @@ -0,0 +1,22 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_OPTS_H +#define URTC_OPTS_H + +#endif /* URTC_OPTS_H */ diff --git a/m4/.gitignore b/m4/.gitignore new file mode 100644 index 0000000..38066dd --- /dev/null +++ b/m4/.gitignore @@ -0,0 +1,5 @@ +libtool.m4 +ltoptions.m4 +ltsugar.m4 +ltversion.m4 +lt~obsolete.m4 diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4 new file mode 100644 index 0000000..1598d07 --- /dev/null +++ b/m4/ax_pthread.m4 @@ -0,0 +1,507 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_pthread.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) +# +# DESCRIPTION +# +# This macro figures out how to build C programs using POSIX threads. It +# sets the PTHREAD_LIBS output variable to the threads library and linker +# flags, and the PTHREAD_CFLAGS output variable to any special C compiler +# flags that are needed. (The user can also force certain compiler +# flags/libs to be tested by setting these environment variables.) +# +# Also sets PTHREAD_CC to any special C compiler that is needed for +# multi-threaded programs (defaults to the value of CC otherwise). (This +# is necessary on AIX to use the special cc_r compiler alias.) +# +# NOTE: You are assumed to not only compile your program with these flags, +# but also to link with them as well. For example, you might link with +# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS +# +# If you are only building threaded programs, you may wish to use these +# variables in your default LIBS, CFLAGS, and CC: +# +# LIBS="$PTHREAD_LIBS $LIBS" +# CFLAGS="$CFLAGS $PTHREAD_CFLAGS" +# CC="$PTHREAD_CC" +# +# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant +# has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to +# that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). +# +# Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the +# PTHREAD_PRIO_INHERIT symbol is defined when compiling with +# PTHREAD_CFLAGS. +# +# ACTION-IF-FOUND is a list of shell commands to run if a threads library +# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it +# is not found. If ACTION-IF-FOUND is not specified, the default action +# will define HAVE_PTHREAD. +# +# Please let the authors know if this macro fails on any platform, or if +# you have any other suggestions or comments. This macro was based on work +# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help +# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by +# Alejandro Forero Cuervo to the autoconf macro repository. We are also +# grateful for the helpful feedback of numerous users. +# +# Updated for Autoconf 2.68 by Daniel Richard G. +# +# LICENSE +# +# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> +# Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG> +# Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl> +# +# This program is free software: you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation, either version 3 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <https://www.gnu.org/licenses/>. +# +# As a special exception, the respective Autoconf Macro's copyright owner +# gives unlimited permission to copy, distribute and modify the configure +# scripts that are the output of Autoconf when processing the Macro. You +# need not follow the terms of the GNU General Public License when using +# or distributing such scripts, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +#serial 27 + +AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) +AC_DEFUN([AX_PTHREAD], [ +AC_REQUIRE([AC_CANONICAL_HOST]) +AC_REQUIRE([AC_PROG_CC]) +AC_REQUIRE([AC_PROG_SED]) +AC_LANG_PUSH([C]) +ax_pthread_ok=no + +# We used to check for pthread.h first, but this fails if pthread.h +# requires special compiler flags (e.g. on Tru64 or Sequent). +# It gets checked for in the link test anyway. + +# First of all, check if the user has set any of the PTHREAD_LIBS, +# etcetera environment variables, and if threads linking works using +# them: +if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then + ax_pthread_save_CC="$CC" + ax_pthread_save_CFLAGS="$CFLAGS" + ax_pthread_save_LIBS="$LIBS" + AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"]) + CFLAGS="$CFLAGS $PTHREAD_CFLAGS" + LIBS="$PTHREAD_LIBS $LIBS" + AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS]) + AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes]) + AC_MSG_RESULT([$ax_pthread_ok]) + if test "x$ax_pthread_ok" = "xno"; then + PTHREAD_LIBS="" + PTHREAD_CFLAGS="" + fi + CC="$ax_pthread_save_CC" + CFLAGS="$ax_pthread_save_CFLAGS" + LIBS="$ax_pthread_save_LIBS" +fi + +# We must check for the threads library under a number of different +# names; the ordering is very important because some systems +# (e.g. DEC) have both -lpthread and -lpthreads, where one of the +# libraries is broken (non-POSIX). + +# Create a list of thread flags to try. Items with a "," contain both +# C compiler flags (before ",") and linker flags (after ","). Other items +# starting with a "-" are C compiler flags, and remaining items are +# library names, except for "none" which indicates that we try without +# any flags at all, and "pthread-config" which is a program returning +# the flags for the Pth emulation library. + +ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" + +# The ordering *is* (sometimes) important. Some notes on the +# individual items follow: + +# pthreads: AIX (must check this before -lpthread) +# none: in case threads are in libc; should be tried before -Kthread and +# other compiler flags to prevent continual compiler warnings +# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) +# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64 +# (Note: HP C rejects this with "bad form for `-t' option") +# -pthreads: Solaris/gcc (Note: HP C also rejects) +# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it +# doesn't hurt to check since this sometimes defines pthreads and +# -D_REENTRANT too), HP C (must be checked before -lpthread, which +# is present but should not be used directly; and before -mthreads, +# because the compiler interprets this as "-mt" + "-hreads") +# -mthreads: Mingw32/gcc, Lynx/gcc +# pthread: Linux, etcetera +# --thread-safe: KAI C++ +# pthread-config: use pthread-config program (for GNU Pth library) + +case $host_os in + + freebsd*) + + # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) + # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) + + ax_pthread_flags="-kthread lthread $ax_pthread_flags" + ;; + + hpux*) + + # From the cc(1) man page: "[-mt] Sets various -D flags to enable + # multi-threading and also sets -lpthread." + + ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags" + ;; + + openedition*) + + # IBM z/OS requires a feature-test macro to be defined in order to + # enable POSIX threads at all, so give the user a hint if this is + # not set. 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So we'll check first for the + # standard Solaris way of linking pthreads (-mt -lpthread). + + ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags" + ;; +esac + +# Are we compiling with Clang? + +AC_CACHE_CHECK([whether $CC is Clang], + [ax_cv_PTHREAD_CLANG], + [ax_cv_PTHREAD_CLANG=no + # Note that Autoconf sets GCC=yes for Clang as well as GCC + if test "x$GCC" = "xyes"; then + AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG], + [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */ +# if defined(__clang__) && defined(__llvm__) + AX_PTHREAD_CC_IS_CLANG +# endif + ], + [ax_cv_PTHREAD_CLANG=yes]) + fi + ]) +ax_pthread_clang="$ax_cv_PTHREAD_CLANG" + + +# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) + +# Note that for GCC and Clang -pthread generally implies -lpthread, +# except when -nostdlib is passed. +# This is problematic using libtool to build C++ shared libraries with pthread: +# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460 +# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333 +# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555 +# To solve this, first try -pthread together with -lpthread for GCC + +AS_IF([test "x$GCC" = "xyes"], + [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"]) + +# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first + +AS_IF([test "x$ax_pthread_clang" = "xyes"], + [ax_pthread_flags="-pthread,-lpthread -pthread"]) + + +# The presence of a feature test macro requesting re-entrant function +# definitions is, on some systems, a strong hint that pthreads support is +# correctly enabled + +case $host_os in + darwin* | hpux* | linux* | osf* | solaris*) + ax_pthread_check_macro="_REENTRANT" + ;; + + aix*) + ax_pthread_check_macro="_THREAD_SAFE" + ;; + + *) + ax_pthread_check_macro="--" + ;; +esac +AS_IF([test "x$ax_pthread_check_macro" = "x--"], + [ax_pthread_check_cond=0], + [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"]) + + +if test "x$ax_pthread_ok" = "xno"; then +for ax_pthread_try_flag in $ax_pthread_flags; do + + case $ax_pthread_try_flag in + none) + AC_MSG_CHECKING([whether pthreads work without any flags]) + ;; + + *,*) + PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"` + PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"` + AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"]) + ;; + + -*) + AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) + PTHREAD_CFLAGS="$ax_pthread_try_flag" + ;; + + pthread-config) + AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) + AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) + PTHREAD_CFLAGS="`pthread-config --cflags`" + PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" + ;; + + *) + AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) + PTHREAD_LIBS="-l$ax_pthread_try_flag" + ;; + esac + + ax_pthread_save_CFLAGS="$CFLAGS" + ax_pthread_save_LIBS="$LIBS" + CFLAGS="$CFLAGS $PTHREAD_CFLAGS" + LIBS="$PTHREAD_LIBS $LIBS" + + # Check for various functions. We must include pthread.h, + # since some functions may be macros. (On the Sequent, we + # need a special flag -Kthread to make this header compile.) + # We check for pthread_join because it is in -lpthread on IRIX + # while pthread_create is in libc. We check for pthread_attr_init + # due to DEC craziness with -lpthreads. We check for + # pthread_cleanup_push because it is one of the few pthread + # functions on Solaris that doesn't have a non-functional libc stub. + # We try pthread_create on general principles. + + AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h> +# if $ax_pthread_check_cond +# error "$ax_pthread_check_macro must be defined" +# endif + static void *some_global = NULL; + static void routine(void *a) + { + /* To avoid any unused-parameter or + unused-but-set-parameter warning. */ + some_global = a; + } + static void *start_routine(void *a) { return a; }], + [pthread_t th; pthread_attr_t attr; + pthread_create(&th, 0, start_routine, 0); + pthread_join(th, 0); + pthread_attr_init(&attr); + pthread_cleanup_push(routine, 0); + pthread_cleanup_pop(0) /* ; */])], + [ax_pthread_ok=yes], + []) + + CFLAGS="$ax_pthread_save_CFLAGS" + LIBS="$ax_pthread_save_LIBS" + + AC_MSG_RESULT([$ax_pthread_ok]) + AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) + + PTHREAD_LIBS="" + PTHREAD_CFLAGS="" +done +fi + + +# Clang needs special handling, because older versions handle the -pthread +# option in a rather... idiosyncratic way + +if test "x$ax_pthread_clang" = "xyes"; then + + # Clang takes -pthread; it has never supported any other flag + + # (Note 1: This will need to be revisited if a system that Clang + # supports has POSIX threads in a separate library. This tends not + # to be the way of modern systems, but it's conceivable.) + + # (Note 2: On some systems, notably Darwin, -pthread is not needed + # to get POSIX threads support; the API is always present and + # active. We could reasonably leave PTHREAD_CFLAGS empty. But + # -pthread does define _REENTRANT, and while the Darwin headers + # ignore this macro, third-party headers might not.) + + # However, older versions of Clang make a point of warning the user + # that, in an invocation where only linking and no compilation is + # taking place, the -pthread option has no effect ("argument unused + # during compilation"). They expect -pthread to be passed in only + # when source code is being compiled. + # + # Problem is, this is at odds with the way Automake and most other + # C build frameworks function, which is that the same flags used in + # compilation (CFLAGS) are also used in linking. Many systems + # supported by AX_PTHREAD require exactly this for POSIX threads + # support, and in fact it is often not straightforward to specify a + # flag that is used only in the compilation phase and not in + # linking. Such a scenario is extremely rare in practice. + # + # Even though use of the -pthread flag in linking would only print + # a warning, this can be a nuisance for well-run software projects + # that build with -Werror. So if the active version of Clang has + # this misfeature, we search for an option to squash it. + + AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread], + [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG], + [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown + # Create an alternate version of $ac_link that compiles and + # links in two steps (.c -> .o, .o -> exe) instead of one + # (.c -> exe), because the warning occurs only in the second + # step + ax_pthread_save_ac_link="$ac_link" + ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g' + ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"` + ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)" + ax_pthread_save_CFLAGS="$CFLAGS" + for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do + AS_IF([test "x$ax_pthread_try" = "xunknown"], [break]) + CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS" + ac_link="$ax_pthread_save_ac_link" + AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], + [ac_link="$ax_pthread_2step_ac_link" + AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], + [break]) + ]) + done + ac_link="$ax_pthread_save_ac_link" + CFLAGS="$ax_pthread_save_CFLAGS" + AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no]) + ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try" + ]) + + case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in + no | unknown) ;; + *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;; + esac + +fi # $ax_pthread_clang = yes + + + +# Various other checks: +if test "x$ax_pthread_ok" = "xyes"; then + ax_pthread_save_CFLAGS="$CFLAGS" + ax_pthread_save_LIBS="$LIBS" + CFLAGS="$CFLAGS $PTHREAD_CFLAGS" + LIBS="$PTHREAD_LIBS $LIBS" + + # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. + AC_CACHE_CHECK([for joinable pthread attribute], + [ax_cv_PTHREAD_JOINABLE_ATTR], + [ax_cv_PTHREAD_JOINABLE_ATTR=unknown + for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do + AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], + [int attr = $ax_pthread_attr; return attr /* ; */])], + [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break], + []) + done + ]) + AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \ + test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \ + test "x$ax_pthread_joinable_attr_defined" != "xyes"], + [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], + [$ax_cv_PTHREAD_JOINABLE_ATTR], + [Define to necessary symbol if this constant + uses a non-standard name on your system.]) + ax_pthread_joinable_attr_defined=yes + ]) + + AC_CACHE_CHECK([whether more special flags are required for pthreads], + [ax_cv_PTHREAD_SPECIAL_FLAGS], + [ax_cv_PTHREAD_SPECIAL_FLAGS=no + case $host_os in + solaris*) + ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS" + ;; + esac + ]) + AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \ + test "x$ax_pthread_special_flags_added" != "xyes"], + [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS" + ax_pthread_special_flags_added=yes]) + + AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], + [ax_cv_PTHREAD_PRIO_INHERIT], + [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], + [[int i = PTHREAD_PRIO_INHERIT; + return i;]])], + [ax_cv_PTHREAD_PRIO_INHERIT=yes], + [ax_cv_PTHREAD_PRIO_INHERIT=no]) + ]) + AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \ + test "x$ax_pthread_prio_inherit_defined" != "xyes"], + [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.]) + ax_pthread_prio_inherit_defined=yes + ]) + + CFLAGS="$ax_pthread_save_CFLAGS" + LIBS="$ax_pthread_save_LIBS" + + # More AIX lossage: compile with *_r variant + if test "x$GCC" != "xyes"; then + case $host_os in + aix*) + AS_CASE(["x/$CC"], + [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], + [#handle absolute path differently from PATH based program lookup + AS_CASE(["x$CC"], + [x/*], + [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], + [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) + ;; + esac + fi +fi + +test -n "$PTHREAD_CC" || PTHREAD_CC="$CC" + +AC_SUBST([PTHREAD_LIBS]) +AC_SUBST([PTHREAD_CFLAGS]) +AC_SUBST([PTHREAD_CC]) + +# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: +if test "x$ax_pthread_ok" = "xyes"; then + ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) + : +else + ax_pthread_ok=no + $2 +fi +AC_LANG_POP +])dnl AX_PTHREAD diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..5855857 --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,9 @@ +lib_LTLIBRARIES = liburtc.la +liburtc_la_SOURCES = g711.c g711_tables.c mdns.c prng.c sdp.c urtc.c \ + uuid.c +include_HEADERS = err.h g711.h mdns.h prng.h sdp.h urtc.h uuid.h + +# for pthreads support on linux +liburtc_la_CFLAGS = $(PTHREAD_CFLAGS) +liburtc_la_LDFLAGS = $(PTHREAD_LDFLAGS) +liburtc_la_LIBADD = $(PTHREAD_LIBS) diff --git a/src/err.h b/src/err.h new file mode 100644 index 0000000..cd7fd19 --- /dev/null +++ b/src/err.h @@ -0,0 +1,58 @@ +/* + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _URTC_ERR_H +#define _URTC_ERR_H + +#ifdef __cplusplus +extern "C" { +#endif + +typedef enum err { + URTC_SUCCESS = 0, + + URTC_ERR, + + URTC_ERR_BAD_ARGUMENT, + URTC_ERR_INSUFFICIENT_MEMORY, + URTC_ERR_MALFORMED, + URTC_ERR_NOT_IMPLEMENTED, + + URTC_ERR_PEERCONN_MISSING_REMOTE_DESC, + + URTC_ERR_SDP_MALFORMED, + URTC_ERR_SDP_MALFORMED_VERSION, + URTC_ERR_SDP_MALFORMED_ORIGIN, + URTC_ERR_SDP_MALFORMED_TIMING, + URTC_ERR_SDP_MALFORMED_MEDIA, + URTC_ERR_SDP_MALFORMED_ATTRIBUTE, + URTC_ERR_SDP_UNSUPPORTED_FINGERPRINT_ALGO, + URTC_ERR_SDP_UNSUPPORTED_MEDIA_PROTOCOL, + URTC_ERR_SDP_UNSUPPORTED_MEDIA_TYPE +} err_t; + +#ifdef __cplusplus +} +#endif + +#endif /* _URTC_ERR_H */ diff --git a/src/g711.c b/src/g711.c new file mode 100644 index 0000000..47114d6 --- /dev/null +++ b/src/g711.c @@ -0,0 +1,40 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <stdio.h> + +#include "g711.h" + +void g711_encode(uint8_t *dst, const int16_t *src, size_t n) { + int i; + + for (i = 0; i < n; i++) { + dst[i] = pcm2ulaw[0x1FFF & (src[i] >> 3)]; + } +} + +void g711_decode(int16_t *dst, const uint8_t *src, size_t n) { + int i; + + for (i = 0; i < n; i++) { + fprintf(stderr, "i = %i, src[i] = %i\n", i, src[i]); + fprintf(stderr, "ulaw2pcm[i] = %i\n", ulaw2pcm[0]); +// dst[i] = ulaw2pcm[src[i]] << 3; + dst[i] = 0; + } +} diff --git a/src/g711.h b/src/g711.h new file mode 100644 index 0000000..b607734 --- /dev/null +++ b/src/g711.h @@ -0,0 +1,68 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef URTC_G711_H +#define URTC_G711_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stddef.h> +#include <stdint.h> + +extern const uint8_t pcm2ulaw[]; +extern const int16_t ulaw2pcm[]; + +/** + * ITU-T G.711 compand a 16-bit signed PCM audio buffer. Buffer may contain + * multiple channels, in which case \a n must be the number of frames times + * the number of channels. + * + * Only the upper 13-bits are companded. The lowest 3-bits are discarded. + * + * \a dst must be allocated and point to at least (\a n / 2) bytes. \a dst + * and \a src may overlap. + * + * @param dst Destination buffer + * @param src Signed 16-bit sample source buffer + * @param n Number of samples (frames times channels) + */ +void g711_encode(uint8_t *dst, const int16_t *src, size_t n); + +/** + * ITU-T G.711 decompand to a 16-bit signed PCM audio buffer. Buffer may + * contain multiple channels, in which case \a n must be the number of frames + * times the number of channels. + * + * The decompanded samples are normalized to 16-bits (the lowest 3-bits will be + * zero). + * + * \a dst must NOT overlap with \a src. + * + * @param dst Destination buffer + * @param src Signed 16-bit sample source buffer + * @param n Number of samples (frames times channels) + */ +void g711_decode(int16_t *dst, const uint8_t *src, size_t n); + +#ifdef __cplusplus +} +#endif + +#endif /* URTC_G711_H */ diff --git a/src/g711_tables.c b/src/g711_tables.c new file mode 100644 index 0000000..0690d1a --- /dev/null +++ b/src/g711_tables.c @@ -0,0 +1,745 @@ +/* + * liburtc + * Copyright 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <stdint.h> + +#include "g711.h" + +/* Table for ITU-T G.711 mu-law companding from 16-bit signed PCM */ +const uint8_t pcm2ulaw[] = { + 0xff, 0xfe, 0xfe, 0xfd, 0xfd, 0xfc, 0xfc, 0xfb, 0xfb, 0xfa, 0xfa, 0xf9, + 0xf9, 0xf8, 0xf8, 0xf7, 0xf7, 0xf6, 0xf6, 0xf5, 0xf5, 0xf4, 0xf4, 0xf3, + 0xf3, 0xf2, 0xf2, 0xf1, 0xf1, 0xf0, 0xf0, 0xef, 0xef, 0xef, 0xef, 0xee, + 0xee, 0xee, 0xee, 0xed, 0xed, 0xed, 0xed, 0xec, 0xec, 0xec, 0xec, 0xeb, + 0xeb, 0xeb, 0xeb, 0xea, 0xea, 0xea, 0xea, 0xe9, 0xe9, 0xe9, 0xe9, 0xe8, + 0xe8, 0xe8, 0xe8, 0xe7, 0xe7, 0xe7, 0xe7, 0xe6, 0xe6, 0xe6, 0xe6, 0xe5, + 0xe5, 0xe5, 0xe5, 0xe4, 0xe4, 0xe4, 0xe4, 0xe3, 0xe3, 0xe3, 0xe3, 0xe2, + 0xe2, 0xe2, 0xe2, 0xe1, 0xe1, 0xe1, 0xe1, 0xe0, 0xe0, 0xe0, 0xe0, 0xdf, + 0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xde, 0xde, 0xde, 0xde, 0xde, + 0xde, 0xde, 0xde, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdc, + 0xdc, 0xdc, 0xdc, 0xdc, 0xdc, 0xdc, 0xdc, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, + 0xdb, 0xdb, 0xdb, 0xda, 0xda, 0xda, 0xda, 0xda, 0xda, 0xda, 0xda, 0xd9, + 0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xd8, 0xd8, 0xd8, 0xd8, 0xd8, + 0xd8, 0xd8, 0xd8, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd6, + 0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd5, 0xd5, 0xd5, 0xd5, 0xd5, + 0xd5, 0xd5, 0xd5, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd3, + 0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd2, 0xd2, 0xd2, 0xd2, 0xd2, + 0xd2, 0xd2, 0xd2, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd0, + 0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, + 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xce, + 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, 0xce, + 0xce, 0xce, 0xce, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, + 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, + 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcb, + 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, + 0xcb, 0xcb, 0xcb, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, + 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xca, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, + 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc8, + 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, 0xc8, + 0xc8, 0xc8, 0xc8, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, + 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, + 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc5, + 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, + 0xc5, 0xc5, 0xc5, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, + 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, + 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc2, + 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, + 0xc2, 0xc2, 0xc2, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, + 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, + 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xbf, + 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, + 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, + 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, + 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, + 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, + 0xbe, 0xbe, 0xbe, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, + 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, + 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbc, + 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, + 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, + 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, + 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, + 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, + 0xbb, 0xbb, 0xbb, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, + 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, + 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xb9, + 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, + 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, + 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, + 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, + 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, + 0xb8, 0xb8, 0xb8, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, + 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, + 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb6, + 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, + 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, + 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, + 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, + 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, + 0xb5, 0xb5, 0xb5, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, + 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, + 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb3, + 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, + 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, + 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, + 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, + 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, + 0xb2, 0xb2, 0xb2, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, + 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, + 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb0, + 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, + 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, + 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, + 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, + 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, + 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, + 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, + 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xae, + 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, + 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, + 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, + 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 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0x82, 0x82, + 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, + 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, + 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, + 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, + 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, + 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, + 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 +}; + +/* Table for ITU-T G.711 mu-law decompanding to 16-bit signed PCM */ +const int16_t ulaw2pcm[] = { + -32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956, + -23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764, + -15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412, + -11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316, + -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140, + -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092, + -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004, + -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980, + -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436, + -1372, -1308, -1244, -1180, -1116, -1052, -988, -924, + -876, -844, -812, -780, -748, -716, -684, -652, + -620, -588, -556, -524, -492, -460, -428, -396, + -372, -356, -340, -324, -308, -292, -276, -260, + -244, -228, -212, -196, -180, -164, -148, -132, + -120, -112, -104, -96, -88, -80, -72, -64, + -56, -48, -40, -32, -24, -16, -8, 0, + + 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, + 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, + 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, + 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, + 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, + 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, + 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, + 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, + 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, + 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, + 876, 844, 812, 780, 748, 716, 684, 652, + 620, 588, 556, 524, 492, 460, 428, 396, + 372, 356, 340, 324, 308, 292, 276, 260, + 244, 228, 212, 196, 180, 164, 148, 132, + 120, 112, 104, 96, 88, 80, 72, 64, + 56, 48, 40, 32, 24, 16, 8, 0 +}; diff --git a/src/log.h b/src/log.h new file mode 100644 index 0000000..0798200 --- /dev/null +++ b/src/log.h @@ -0,0 +1,83 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _URTC_LOG_H +#define _URTC_LOG_H + +#include <stdio.h> + +#ifdef _cplusplus +extern "C" { +#endif + +enum level { + TRACE = 0, + DEBUG, + INFO, + WARN, + ERROR, + FATAL, + NUM_LEVELS // must be last +}; + +static const char *logl[NUM_LEVELS] = { + "\033[0;37m", // trace (gray) + "\033[0;32m", // debug (green) + "", // info (white) + "\033[0;33m", // warn (yellow) + "\033[0;35m", // error (magenta) + "\033[0;31m" // fatal (red) +}; + +static const char *logn[NUM_LEVELS] = { + "[trace] ", // trace (gray) + "[debug] ", // debug (green) + "[info] ", // info (white) + "[warn] ", // warn (yellow) + "[error] ", // error (magenta) + "[fatal] " // fatal (red) +}; + +static const char *logr[NUM_LEVELS] = { + "\033[0m\n", // trace + "\033[0m\n", // debug + "\n", // info + "\033[0m\n", // warn + "\033[0m\n", // error + "\033[0m\n" // fatal +}; + +#define STRINGIFY(x) #x +#define TOSTRING(x) STRINGIFY(x) +#define AT __FILE__ ":" TOSTRING(__LINE__) + +#define log(lvl, format, ...) \ + do { \ + fprintf(stderr, "%s" AT " %s" format "%s", logl[lvl], logn[lvl], ##__VA_ARGS__, logr[lvl]); \ + } while (0); + +#ifdef _cplusplus +} +#endif + +#endif // _URTC_LOG_H diff --git a/src/mdns.c b/src/mdns.c new file mode 100644 index 0000000..fa782e4 --- /dev/null +++ b/src/mdns.c @@ -0,0 +1,607 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <errno.h> +#include <net/if.h> // IFF_LOOPBACK (include pre ifaddrs.h) +#include <ifaddrs.h> // getifaddrs +#include <limits.h> // HOST_NAME_MAX +#include <stdbool.h> +#include <string.h> // memcpy +#include <unistd.h> // sleep + +#include <arpa/inet.h> +#include <netinet/in.h> +#ifdef WITH_IPV6 + #include <netinet6/in6.h> +#endif +#include <sys/socket.h> // sendto, setsocketopt, socket + +#include "err.h" +#include "log.h" +#include "mdns.h" +#include "uuid.h" + +#define MDNS_ADDR "224.0.0.251" +#define MDNS_PORT 5353 + +#define DEFAULT_TTL 120 // time-to-live recommended by RFC 6762 + +#define CLASS_INTERNET 1 +#define CACHE_FLUSH (1 << 15) + +#define FLAG_RESPONSE (1 << 15) +#define FLAG_OPCODE (0xF << 11) + +#ifndef HOST_NAME_MAX + #define HOST_NAME_MAX 255 +#endif + +struct __attribute__((__packed__)) header { + uint16_t id; + uint16_t flags; + uint16_t n_question; // number of question records + uint16_t n_answer; // number of answer records + uint16_t n_authority; // number of authority records + uint16_t n_additional; // number of additional records +}; + +struct __attribute__((__packed__)) qname { + uint8_t size; + uint8_t name[]; +}; + +struct __attribute__((__packed__)) answer { + // variable length name precedes answer + uint16_t type; + uint16_t class; + uint32_t ttl; + uint16_t size; + uint8_t data[]; +}; + +/** + * Subscribe to mDNS queries + * + * Opens new multicast socket on the mDNS port. This socket receives and can + * be used to send mDNS datagrams. Close with mdns_unsubscribe(). + * + * \return Socket file descriptor on success, negative on error. + */ +int mdns_subscribe() { + // create socket + int sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (-1 == sockfd) { + log(ERROR, "%s", strerror(errno)); + goto _fail_create_socket; + } + + // enable address/port reuse + { + const unsigned int opt = 1; + if (-1 == setsockopt( + sockfd, + SOL_SOCKET, +#if defined(__APPLE__) || defined(__FreeBSD__) + SO_REUSEPORT, +#else + SO_REUSEADDR, +#endif + &opt, + sizeof(opt) + )) { + log(ERROR, "%s", strerror(errno)); + goto _fail_enable_addr_reuse; + } + } + + // bind socket to mDNS query port + { + const struct sockaddr_in mgroup = { + .sin_family = AF_INET, + .sin_addr.s_addr = htonl(INADDR_ANY), + .sin_port = htons(MDNS_PORT) + }; + if (-1 == bind(sockfd, (struct sockaddr *)(&mgroup), sizeof(mgroup))) { + log(ERROR, "%s", strerror(errno)); + goto _fail_bind; + } + } + + // disable loopback + { + const int opt = 0; + if (-1 == setsockopt( + sockfd, + IPPROTO_IP, + IP_MULTICAST_LOOP, + &opt, + sizeof(opt) + )) { + log(ERROR, "setsockopt: %s", strerror(errno)); + goto _fail_disable_loopback; + } + } + + // join multicast group + { + const struct ip_mreqn imr = { + .imr_multiaddr.s_addr = inet_addr(MDNS_ADDR), + .imr_address.s_addr = htonl(INADDR_ANY) + }; + if (-1 == setsockopt( + sockfd, + IPPROTO_IP, + IP_ADD_MEMBERSHIP, + &imr, + sizeof(imr) + )) { + log(ERROR, "setsockopt: %s", strerror(errno)); + goto _fail_join_multicast_group; + } + } + + return sockfd; + +_fail_join_multicast_group: +_fail_disable_loopback: +_fail_bind: +_fail_enable_addr_reuse: + close(sockfd); +_fail_create_socket: + + return -URTC_ERR; +} + +/** + * Unsubscribe from mDNS queries + * + * Close multicast socket previously opened with mdns_subscribe(). + * + * \param sockfd Socket file descriptor returned by mdns_subscribe(). + * + * \return 0 on success, negative on error. + */ +int mdns_unsubscribe(int sockfd) { + if (-1 == close(sockfd)) { + log(ERROR, "close: %s", strerror(errno)); + return -URTC_ERR; + } + + return 0; +} + +/** + * Send a multicast DNS query + * + * \param name Hostname to query. Must end with ".local". + * + * \return 0 on success, negative on error. + */ +int mdns_query(const char *name) { + // create socket + int msockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (-1 == msockfd) { + log(FATAL, "socket: %s", strerror(errno)); + } + + uint8_t q[512]; + size_t qlen = 0; + + // header + struct header hdr = { + .n_question = htons(1) + }; + memcpy(&q[qlen], &hdr, sizeof(hdr)); + qlen += sizeof(hdr); + + // qname + q[qlen] = strlen(name); + memcpy(&q[1 + qlen], name, strlen(name)); + qlen += 1 + q[qlen]; + + q[qlen] = strlen("local"); + memcpy(&q[1 + qlen], "local", strlen("local")); + qlen += 1 + q[qlen]; + + q[qlen++] = 0; // root record + + // qtype: 255 = any + q[qlen++] = 0; + q[qlen++] = 255; + + // qclass: 1 = ipv4 + q[qlen++] = 0x80; // unicast response please + q[qlen++] = 1; + + // send query + struct sockaddr_in mgroup = { + .sin_family = AF_INET, + .sin_addr.s_addr = inet_addr(MDNS_ADDR), + .sin_port = htons(MDNS_PORT) + }; + if (-1 == sendto(msockfd, q, qlen, 0, (struct sockaddr *)(&mgroup), sizeof(mgroup))) { + log(FATAL, "sendto: %s", strerror(errno)); + } + + return 0; +} + +/** + * Simple mDNS response parser (single record only) + * + * \param response mDNS response packet + * \param len Length of response, in bytes + * + * \return 0 on success, negative on error. + */ +int mdns_parse_response(const void *response, size_t len) +{ + // sanity checks + if (!response) return -URTC_ERR_BAD_ARGUMENT; + if (len < sizeof(struct header)) return -URTC_ERR_MALFORMED; + + struct header *hdr = (struct header *)(response); + response += sizeof(struct header); + len -= sizeof(struct header); + + // transaction id must be zero + if (0 != hdr->id) return -URTC_ERR_MALFORMED; + + // flags must indicate a response + if (!(ntohs(hdr->flags) & FLAG_RESPONSE)) return -URTC_ERR_MALFORMED; + + // sent single question, expecting reponse for single question + if (1 != ntohs(hdr->n_question)) return -URTC_ERR_MALFORMED; + + // parse query names + struct qname *qname; + do { + if (len < 1) return -URTC_ERR_MALFORMED; + qname = (struct qname *)(response); + if (len < 1 + qname->size) return -URTC_ERR_MALFORMED; + response += 1 + qname->size; + len -= 1 + qname->size; + } while (qname->size); + + // parse query type (ignore) + if (len < sizeof(uint16_t)) return -URTC_ERR_MALFORMED; + response += sizeof(uint16_t); + len -= sizeof(uint16_t); + + // parse query class (ignore) + if (len < sizeof(uint16_t)) return -URTC_ERR_MALFORMED; + response += sizeof(uint16_t); + len -= sizeof(uint16_t); + + // answers + for (int i = 0; i < ntohs(hdr->n_answer); i++) { + uint16_t size; + uint8_t namelen; + + // parse name (assume matches) + if (len < 2) return -URTC_ERR_MALFORMED; + namelen = *(uint8_t *)response; + switch (namelen) { + // name compression + case 0xc0: + response += 2; + len -= 2; + break; + // no name compression + default: + response += 1 + namelen; + len -= 1 + namelen; + break; + } + + if (len < sizeof(struct answer)) return -URTC_ERR_MALFORMED; + struct answer *answer = (struct answer *)response; + response += sizeof(struct answer); + len -= sizeof(struct answer); + + size = ntohs(answer->size); + if (len < size) return -URTC_ERR_MALFORMED; + response += size; + len -= size; + } + + return 0; +} + +/** + * Check if run-length encoded query name resource records match hostname + * + * \param expected Expected hostname record. + * \param q Length-encoded query names. + * \param len Pointer to minimum length of q. Overwritten with actual length. + * + * \return Positive on match, 0 on no match, negative on malformed query. + */ +static int match(const char *expected, const uint8_t *q, int *len) { + struct qname *qname; + bool matches; + int n_records; + int n; + + if (!q) return -URTC_ERR_BAD_ARGUMENT; + if (!expected) return -URTC_ERR_BAD_ARGUMENT; + if (!len) return -URTC_ERR_BAD_ARGUMENT; + + n = *len; + matches = true; + + n_records = 0; + do { + // minimum size check: a single root record (1 byte) + if (n < 1) return -URTC_ERR_MALFORMED; + qname = (struct qname *)(q); + + // minimum size check: length byte plus stated length + if (n < 1 + qname->size) return -URTC_ERR_MALFORMED; + + // match records + switch (n_records) { + // match hostname record + case 0: + if (qname->size == strlen(expected)) { + if (0 == memcmp(qname->name, expected, qname->size)) { + break; // matched + } + } + matches = false; + break; + // match "local" record + case 1: + if (qname->size == sizeof("local")-1) { + if (0 == memcmp(qname->name, "local", sizeof("local")-1)) { + break; //matched + } + } + matches = false; + break; + // match root record + case 2: + if (qname->size == 0) { + break; + } + matches = false; + break; + // match ancillary records + default: + matches = false; + break; + } + + q += 1 + qname->size; + n -= 1 + qname->size; + n_records++; + } while(qname->size); + + // update with actual length of run-length encoding + *len -= n; + + return matches; +} + +/** + * Validate whether mDNS packet is a query for the specified hostname + * + * Only standard, single question queries are supported. All others + * return an error. + * + * \param q Query buffer (from network) + * \param n Size of query (in bytes) + * \param hostname Queried hostname + * + * \return 0 on success, negative on error + */ +int mdns_validate_query(const uint8_t *q, size_t n, const char *hostname) +{ + const struct header *hdr = (struct header *)q; + const uint8_t *qi = q; + const size_t ni = n; + int found; + + found = 0; + + // sanity checks + if (!q) return -URTC_ERR_BAD_ARGUMENT; + if (n < sizeof(struct header)) return -URTC_ERR_MALFORMED; + + q += sizeof(struct header); + n -= sizeof(struct header); + + // transaction id must be zero + // note: hdr in host byte order (0 is byte order agnostic) + if (0 != hdr->id) return -URTC_ERR_MALFORMED; + + // only support standard, non-truncated, non-recursive queries + // note: hdr in host byte order (non-0 is byte order agnostic) + if (hdr->flags) return -URTC_ERR_NOT_IMPLEMENTED; + + // parse questions + for (int j = 0; j < ntohs(hdr->n_question); j++) { + bool matched; + int ret; + int len; + + // upper two bits set? "compressed" records + matched = false; + if (n > 2 && q[0] >> 6 == 3) { + // compressed (i.e. offset to previous record) + const uint16_t offset = ((q[0] & 0x3F) << 8) | q[1]; + if (offset > ni) return -URTC_ERR_MALFORMED; + len = ni - offset; + ret = match(hostname, qi + offset, &len); + q += 2; + n -= 2; + } else { + // uncompressed + len = n; + ret = match(hostname, q, &len); + q += len; + n -= len; + } + if (ret < 0) return ret; + if (ret > 0) matched = true; + + // parse query type for A and AAAA records + if (n < sizeof(uint16_t)) return -URTC_ERR_MALFORMED; + if (matched) { + uint16_t type = ntohs(*(uint16_t *)(q)); + if (TYPE_A == type || TYPE_AAAA == type) { + found |= type; + } + } + q += sizeof(uint16_t); + n -= sizeof(uint16_t); + + // parse query class (ignore) + if (n < sizeof(uint16_t)) return -URTC_ERR_MALFORMED; + q += sizeof(uint16_t); + n -= sizeof(uint16_t); + } + + return found; +} + +/** + * Send mDNS response + * + * \param hostname NULL-terminated hostname (sans ".local" suffix) + * + * \return 0 on success, negative on error + */ +int mdns_send_response(int sockfd, const char *hostname) { + struct ifaddrs *ifaddrs; + struct header *hdr; + uint8_t *wr; // writer (convenience pointer) + uint8_t response[ + sizeof(struct header) + + 1 + HOST_NAME_MAX + 1 + // max size of length and host record + 1 + sizeof(".local") + // size of length and local record + 1 + // size of root record + sizeof(struct answer) + + 16 // size of AAAA record (largest record) + ]; + hdr = (struct header *)(response); + wr = response; + + // write header + *hdr = (struct header){ + .id = 0, + .flags = htons(FLAG_RESPONSE), + .n_question = 0, + .n_answer = 0, + .n_authority = 0, + .n_additional = 0 + }; + wr += sizeof(struct header); + + // get linked list of network interfaces + if (-1 == getifaddrs(&ifaddrs)) { + log(ERROR, "%s", strerror(errno)); + goto _fail_getifaddrs; + } + + // for each network interface... + for (struct ifaddrs *ifaddr = ifaddrs; ifaddr; ifaddr = ifaddr->ifa_next) { + // skip loopback interfaces + if (ifaddr->ifa_flags & IFF_LOOPBACK) continue; + + // for an AF_INET* interface address, display the address + if (ifaddr->ifa_addr && ifaddr->ifa_addr->sa_family == AF_INET) { + + // write host record + { + strncpy((char *)(wr + 1), hostname, HOST_NAME_MAX); + wr[1 + HOST_NAME_MAX - 1] = '\0'; + *wr = strlen((char *)(wr + 1)); + wr += 1 + strlen((char *)(wr + 1)); + } + + // write local record + { + const char local[] = "local"; + *wr++ = sizeof(local) - 1; + memcpy(wr, local, sizeof(local) - 1); + wr += sizeof(local) - 1; + } + + // write root record + *wr++ = 0; + + // write answer + { + struct answer ans = { + .type = htons(TYPE_A), + .class = htons(CACHE_FLUSH | CLASS_INTERNET), + .ttl = htonl(DEFAULT_TTL), + .size = htons(sizeof(struct in_addr)), + }; + memcpy(wr, &ans, sizeof(ans)); + wr += sizeof(ans); + + memcpy(wr, + &(((struct sockaddr_in *)(ifaddr->ifa_addr))->sin_addr), + sizeof(struct in_addr)); + wr += sizeof(struct in_addr); + } + + // increment number of answers + hdr->n_answer++; + + if (hdr->n_answer == 1) { + break; + } + } + } + + // free linked list of network interfaces + freeifaddrs(ifaddrs); + + // convert to network byte order + hdr->n_answer = htons(hdr->n_answer); + + // send response + struct sockaddr_in mgroup = { + .sin_family = AF_INET, + .sin_addr.s_addr = inet_addr(MDNS_ADDR), + .sin_port = htons(MDNS_PORT) + }; + if (-1 == sendto( + sockfd, + response, + wr - response, + 0, + (struct sockaddr *)(&mgroup), + sizeof(mgroup) + )) { + log(FATAL, "sendto: %s", strerror(errno)); + } + + return 0; + +_fail_getifaddrs: + return -URTC_ERR; +} diff --git a/src/mdns.h b/src/mdns.h new file mode 100644 index 0000000..7e73ba6 --- /dev/null +++ b/src/mdns.h @@ -0,0 +1,43 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _URTC_MDNS_H +#define _URTC_MDNS_H + +#include <stddef.h> +#include <stdint.h> + +#define TYPE_A 1 // IPv4 record +#define TYPE_AAAA 28 // IPv6 record + +// server: for processing queries and generating responses +int mdns_subscribe(); +int mdns_unsubscribe(int sockfd); +int mdns_validate_query(const uint8_t *q, size_t n, const char *hostname); +int mdns_send_response(int sockfd, const char *hostname); + +// client: for sending queries and processing responses +int mdns_parse_response(const void *response, size_t len); +int mdns_query(const char *name); + +#endif // _URTC_MDNS_H diff --git a/src/prng.c b/src/prng.c new file mode 100644 index 0000000..147304b --- /dev/null +++ b/src/prng.c @@ -0,0 +1,47 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <stdint.h> +#include <stdlib.h> +#include <time.h> + +#include "prng.h" + +/** + * Initialize pseudo-random number generator + */ +void prng_init() { + srand(time(NULL)); +} + +/** + * Fill specified memory with pseudo-random data + * + * \param dst Destination memory + * \param sz Size (in bytes) of destination memory + */ +void prng(void *dst, size_t sz) { + for (; sz; sz--) { + *(uint8_t *)dst++ = rand() & 0xFF; + } +} diff --git a/src/prng.h b/src/prng.h new file mode 100644 index 0000000..b1ad9b4 --- /dev/null +++ b/src/prng.h @@ -0,0 +1,31 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _URTC_PRNG_H +#define _URTC_PRNG_H + +void prng_init(); + +void prng(void *dst, size_t sz); + +#endif // _URTC_PRNG_H diff --git a/src/sdp.c b/src/sdp.c new file mode 100644 index 0000000..baa1ece --- /dev/null +++ b/src/sdp.c @@ -0,0 +1,699 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "err.h" +#include "log.h" +#include "sdp.h" + +#define STRINGIFY(x) #x +#define TOSTRING(x) STRINGIFY(x) + +/** + * Parse group attribute + * + * Format is: + * + * a=group:BUNDLE <mid> <mid> ... + * + * Only the BUNDLE semantics value is supported. + * + * \param sdp[out] SDP structure updated with bundle id tags. + * \param value[in] NULL-terminated string containing SDP attribute line value + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_attr_group(struct sdp *sdp, char *val) { + char *id = val; + + val = strsep(&id, " "); + + if (0 == strcmp("BUNDLE", val)) { + for (int i = 0; id && i < SDP_MAX_BUNDLE_IDS; i++) { + strncpy(sdp->mid[i], strsep(&id, " "), SDP_MAX_BUNDLE_ID_SIZE); + } + } + return 0; +} + +static int sdp_parse_attr_msid_semantic(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +static int sdp_parse_attr_rtcp(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +static int sdp_parse_attr_ice_ufrag(struct sdp *sdp, const char *val) { + if (sdp->ufrag != strncpy(sdp->ufrag, val, sizeof(sdp->ufrag))) { + return -1; + } + return 0; +} + +static int sdp_parse_attr_ice_password(struct sdp *sdp, const char *val) { + if (sdp->pwd != strncpy(sdp->pwd, val, sizeof(sdp->pwd))) { + return -1; + } + return 0; +} + +static int sdp_parse_attr_ice_options(struct sdp *sdp, const char *val) { + if (0 == strcmp("trickle", val)) { + sdp->ice_options.trickle = true; + } + return 0; +} + +/** + * Parse fingerprint + * + * Only SHA-256 fingerprint is supported. + * + * \param[out] sdp SDP structure updated with parsed content. + * \param[in] val NULL-terminated string. + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_attr_fingerprint(struct sdp *sdp, char *val) { + char *fingerprint = val; + + val = strsep(&fingerprint, " "); + + if (fingerprint) { + if (0 == strcmp("sha-256", val)) { + if (32 != sscanf(fingerprint, + "%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:" + "%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:" + "%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:" + "%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX:%2hhX", + &sdp->fingerprint.sha256[0], &sdp->fingerprint.sha256[1], + &sdp->fingerprint.sha256[2], &sdp->fingerprint.sha256[3], + &sdp->fingerprint.sha256[4], &sdp->fingerprint.sha256[5], + &sdp->fingerprint.sha256[6], &sdp->fingerprint.sha256[7], + &sdp->fingerprint.sha256[8], &sdp->fingerprint.sha256[9], + &sdp->fingerprint.sha256[10], &sdp->fingerprint.sha256[11], + &sdp->fingerprint.sha256[12], &sdp->fingerprint.sha256[13], + &sdp->fingerprint.sha256[14], &sdp->fingerprint.sha256[15], + &sdp->fingerprint.sha256[16], &sdp->fingerprint.sha256[17], + &sdp->fingerprint.sha256[18], &sdp->fingerprint.sha256[19], + &sdp->fingerprint.sha256[20], &sdp->fingerprint.sha256[21], + &sdp->fingerprint.sha256[22], &sdp->fingerprint.sha256[23], + &sdp->fingerprint.sha256[24], &sdp->fingerprint.sha256[25], + &sdp->fingerprint.sha256[26], &sdp->fingerprint.sha256[27], + &sdp->fingerprint.sha256[28], &sdp->fingerprint.sha256[29], + &sdp->fingerprint.sha256[30], &sdp->fingerprint.sha256[31] + )) { + return -URTC_ERR_SDP_MALFORMED; + } + } else { + return -URTC_ERR_SDP_UNSUPPORTED_FINGERPRINT_ALGO; + } + } else { + return -URTC_ERR_SDP_MALFORMED; + } + + return 0; +} + +static int sdp_parse_attr_setup(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +static int sdp_parse_attr_mid(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +static int sdp_parse_attr_extmap(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +/** + * Parse RTP map + * + * Expected format is: + * + * <payload type> <encoding name>/<clock rate> [/<encoding parameters>] + * + * \param[out] sdp SDP structure updated with parsed content. + * \param[in] val NULL-terminated string. + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_attr_rtpmap(struct sdp *sdp, char *val) { + if (!val) return -URTC_ERR_SDP_MALFORMED; + + unsigned int pt; // payload type + char en[7]; // encoding name + unsigned int cr; // clock rate + + if (3 != sscanf(val, "%3d %6[a-zA-Z0-9]%*c%5d", &pt, en, &cr)) { + return -URTC_ERR_SDP_MALFORMED_ATTRIBUTE; + } + + if (0 == strcmp("H264", en)) { + for (int i = 0; i < sdp->video.count; i++) { + if (sdp->video.params[i].type == pt) { + sdp->video.params[i].clock = cr; + sdp->video.params[i].codec = SDP_CODEC_H264; + } + } + } + + return 0; +} + +static int sdp_parse_attr_rtcp_feedback(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +static int sdp_parse_attr_fmtp(struct sdp *sdp, const char *val) { + /* not implemented */ + return 0; +} + +/** + * Parse SDP attribute line + * + * \param sdp[out] SDP structure updated with parsed content + * \param attr[in] NULL-terminated SDP attribute string (after "a=") + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_attribute(struct sdp *sdp, char *attr) { + char *value = attr; + + // Find colon separating attribute from value + attr = strsep(&value, ":"); + + if (value) { + if (0 == strcmp("group", attr)) { + return sdp_parse_attr_group(sdp, value); + } else if (0 == strcmp("msid-semantic", attr)) { + return sdp_parse_attr_msid_semantic(sdp, value); + } else if (0 == strcmp("rtcp", attr)) { + return sdp_parse_attr_rtcp(sdp, value); + } else if (0 == strcmp("ice-ufrag", attr)) { + return sdp_parse_attr_ice_ufrag(sdp, value); + } else if (0 == strcmp("ice-pwd", attr)) { + return sdp_parse_attr_ice_password(sdp, value); + } else if (0 == strcmp("ice-options", attr)) { + return sdp_parse_attr_ice_options(sdp, value); + } else if (0 == strcmp("fingerprint", attr)) { + return sdp_parse_attr_fingerprint(sdp, value); + } else if (0 == strcmp("setup", attr)) { + return sdp_parse_attr_setup(sdp, value); + } else if (0 == strcmp("mid", attr)) { + return sdp_parse_attr_mid(sdp, value); + } else if (0 == strcmp("extmap", attr)) { + return sdp_parse_attr_extmap(sdp, value); + } else if (0 == strcmp("rtpmap", attr)) { + return sdp_parse_attr_rtpmap(sdp, value); + } else if (0 == strcmp("rtcp-fb", attr)) { + return sdp_parse_attr_rtcp_feedback(sdp, value); + } else if (0 == strcmp("fmtp", attr)) { + return sdp_parse_attr_fmtp(sdp, value); + } + } else /* flag */ { + if (0 == strcmp("recvonly", attr)) { + sdp->mode = SDP_MODE_RECEIVE_ONLY; + } else if (0 == strcmp("sendonly", attr)) { + sdp->mode = SDP_MODE_SEND_ONLY; + } else if (0 == strcmp("sendrecv", attr)) { + sdp->mode = SDP_MODE_SEND_AND_RECEIVE; + } else if (0 == strcmp("rtcp-mux", attr)) { + sdp->rtcp_mux = true; + } else if (0 == strcmp("rtcp-rsize", attr)) { + sdp->rtcp_rsize = true; + } + } + + return 0; +} + +/** + * Parse media description line + * + * Format is: + * + * m=<audio|video> <port> UDP/TLS/RTP/SAVPF <n> ... + * + * Only the UDP/TLS/RTP/SAVPF transport protocol is supported. + * + * \param sdp[out] SDP structure updated with username, session id and + * session version. + * \param value[in] NULL-terminated string containing SDP line value + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_media_description(struct sdp *sdp, char *value) { + char *next = value; + + value = strsep(&next, " "); + + if (0 == strcmp("audio", value)) { + /* not implemented */ + } else if (0 == strcmp("video", value)) { + if (!next) return -URTC_ERR_SDP_MALFORMED_MEDIA; + + /* get port */ + value = strsep(&next, " "); + if (1 != sscanf(value, "%5hd", &sdp->video.port)) { + return -URTC_ERR_SDP_MALFORMED_MEDIA; + } + if (!next) return -URTC_ERR_SDP_MALFORMED_MEDIA; + + /* get protocol: only "UDP/TLS/RTP/SAVPF" supported */ + value = strsep(&next, " "); + if (0 != strcmp("UDP/TLS/RTP/SAVPF", value)) { + return -URTC_ERR_SDP_UNSUPPORTED_MEDIA_PROTOCOL; + } + if (!next) return -URTC_ERR_SDP_MALFORMED_MEDIA; + + /* get RTP payload types */ + sdp->video.count = 0; + for ( + value = strsep(&next, " "); + value && sdp->video.count < SDP_MAX_RTP_PAYLOAD_TYPES; + value = strsep(&next, " ") + ) { + unsigned int *v = &sdp->video.params[sdp->video.count].type; + if (1 != sscanf(value, "%3d", v)) { + return -URTC_ERR_SDP_MALFORMED_MEDIA; + } + sdp->video.count++; + } + + } else if (0 == strcmp("text", value)) { + /* ignore */ + } else if (0 == strcmp("message", value)) { + /* ignore */ + } else if (0 == strcmp("application", value)) { + /* ignore */ + } else { + return -URTC_ERR_SDP_UNSUPPORTED_MEDIA_TYPE; + } + + return 0; +} + +static int sdp_parse_connection_data(struct sdp *sdp, const char *value) { + return 0; +} + +/** + * Parse version line + * + * Format is: + * + * v=0 + * + * Only version zero is supported. Anything else is an error. + * + * \param value[in] NULL-terminated string containing SDP line value + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_version(struct sdp *sdp, const char *value) { + if (0 != strcmp("0", value)) { + return -URTC_ERR_SDP_MALFORMED_VERSION; + } + sdp->version = 0; + + return 0; +} + +/** + * Parse origin line + * + * Format is: + * + * o=<username> <sess-id> <sess-version> <nettype> <addrtype> + * <unicast-address> + * + * <nettype> <addrtype> and <unicast-address> are ignored. + * + * \param sdp[out] SDP structure updated with username, session id and + * session version. + * \param value[in] NULL-terminated string containing SDP line value + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_origin(struct sdp *sdp, const char *value) { + if (3 != sscanf(value, + "%" TOSTRING(SDP_MAX_USERNAME_SIZE) "s " + "%" TOSTRING(SDP_MAX_SESSION_ID_SIZE) "[0-9] " + "%" TOSTRING(SDP_MAX_SESSION_VERSION_SIZE) "[0-9] " + "IN IP4 127.0.0.1", + sdp->username, + sdp->session_id, + sdp->session_version + )) { + return -URTC_ERR_SDP_MALFORMED_ORIGIN; + } + + return 0; +} + +static int sdp_parse_session_name(struct sdp *sdp, const char *value) { + return 0; +} + +/** + * Parse timing line + * + * Format is: + * + * t=<start-time> <stop-time> + * + * \param sdp[out] SDP structure updated with start and stop time + * \param value[in] NULL-terminated string containing SDP line value + * + * \return 0 on success. Negative on error. + */ +static int sdp_parse_timing(struct sdp *sdp, const char *value) { + if (2 != sscanf(value, "%10lli %10lli", + (unsigned long long *)&sdp->start_time, + (unsigned long long *)&sdp->stop_time + )) { + return -URTC_ERR_SDP_MALFORMED_TIMING; + } + + return 0; +} + +/** + * Parse a line of SDP + * + * \param sdp[out] SDP structure to be updated with parsed information + * \param line[in] NULL-terminated string containing one line of SDP + * + * \return 0 on success, negative on error. + */ +static int sdp_parse_line(struct sdp *sdp, char *line) { + if (!line) return -URTC_ERR_BAD_ARGUMENT; + if (0 == strlen(line)) return 0; + if (strlen(line) < 3) return -URTC_ERR_SDP_MALFORMED; + if ('=' != line[1]) return -URTC_ERR_SDP_MALFORMED; + + char type = line[0]; + char *value = line + 2; + + switch (type) { + case 'a': + return sdp_parse_attribute(sdp, value); + case 'c': + return sdp_parse_connection_data(sdp, value); + case 'o': + return sdp_parse_origin(sdp, value); + case 'm': + return sdp_parse_media_description(sdp, value); + case 's': + return sdp_parse_session_name(sdp, value); + case 't': + return sdp_parse_timing(sdp, value); + case 'v': + return sdp_parse_version(sdp, value); + default: + /* ignore unsupported types */ + return 0; + } +} + + +int sdp_parse(struct sdp *dst, const char *str) { + if (!str) return -URTC_ERR_BAD_ARGUMENT; + if (!dst) return -URTC_ERR_BAD_ARGUMENT; + + err_t retval = 0; + + /* make a malleable copy of string for parser */ + char *copy = malloc(strlen(str)); + if (copy) { + strcpy(copy, str); + + for (char *in = copy, *line = strsep(&in, "\r\n"); in; line = strsep(&in, "\r\n")) { + retval = sdp_parse_line(dst, line); + if (retval != 0) { + log(ERROR, "sdp_parse_line returned %i for %s", retval, line); + break; + } + } + + free(copy); + } else { + return -URTC_ERR_INSUFFICIENT_MEMORY; + } + + return retval; +} + +int sdp_serialize(char *dst, size_t len, const struct sdp *src) { + int n; + + // sanity check + if (!dst) return -URTC_ERR_BAD_ARGUMENT; + if (!src) return -URTC_ERR_BAD_ARGUMENT; + + // write version + n = snprintf(dst, len, "v=%u\n", src->version); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write originator and session identifier + n = snprintf(dst, len, + "o=liburtc/0.0.0 %s %s IN IP4 127.0.0.1\n", + src->session_id, + src->session_version + ); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write session name + n = snprintf(dst, len, "s=%s\n", + 0 == strlen(src->session_name) ? " " : src->session_name); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write uri + n = snprintf(dst, len, "u=http://www.liburtc.org\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write time descriptor + n = snprintf(dst, len, "t=%" PRIu64 " %" PRIu64 "\n", + src->start_time, src->stop_time); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write session attribute + n = snprintf(dst, len, "a=group:BUNDLE"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + for (int i = 0; i < SDP_MAX_BUNDLE_IDS; i++) { + if (strlen(src->mid[i]) > 0) { + n = snprintf(dst, len, " %s", src->mid[i]); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + } + } + n = snprintf(dst, len, "\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write video media description + if (src->video.count > 0) { + n = snprintf( + dst, len, "m=video %hd UDP/TLS/RTP/SAVPF", src->video.port + ); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + for (int i = 0; i < src->video.count; i++) { + if (src->video.params[i].codec == SDP_CODEC_H264) { + n = snprintf(dst, len, " %d", src->video.params[i].type); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n > len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + } + } + n = snprintf(dst, len, "\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + } + + // TODO write rtcp attribute + + // write connection information (TODO IPv6) + n = snprintf(dst, len, "c=IN IP4 0.0.0.0\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write media attribute: ice ufrag + n = snprintf(dst, len, "a=ice-ufrag:%s\n", src->ufrag); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write media attribute: ice pwd + n = snprintf(dst, len, "a=ice-pwd:%s\n", src->pwd); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write media attribute: trickle ICE + if (src->ice_options.trickle) { + n = snprintf(dst, len, "a=ice-options:trickle\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + } + + // write media attribute: fingerprint + n = snprintf(dst, len, + "a=fingerprint:sha-256 " + "%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:" + "%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:" + "%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:" + "%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX:%02hhX\n", + src->fingerprint.sha256[0], src->fingerprint.sha256[1], + src->fingerprint.sha256[2], src->fingerprint.sha256[3], + src->fingerprint.sha256[4], src->fingerprint.sha256[5], + src->fingerprint.sha256[6], src->fingerprint.sha256[7], + src->fingerprint.sha256[8], src->fingerprint.sha256[9], + src->fingerprint.sha256[10], src->fingerprint.sha256[11], + src->fingerprint.sha256[12], src->fingerprint.sha256[13], + src->fingerprint.sha256[14], src->fingerprint.sha256[15], + src->fingerprint.sha256[16], src->fingerprint.sha256[17], + src->fingerprint.sha256[18], src->fingerprint.sha256[19], + src->fingerprint.sha256[20], src->fingerprint.sha256[21], + src->fingerprint.sha256[22], src->fingerprint.sha256[23], + src->fingerprint.sha256[24], src->fingerprint.sha256[25], + src->fingerprint.sha256[26], src->fingerprint.sha256[27], + src->fingerprint.sha256[28], src->fingerprint.sha256[29], + src->fingerprint.sha256[30], src->fingerprint.sha256[31] + ); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // TODO write setup, mid + + // write media attribute: mode + switch (src->mode) { + case SDP_MODE_RECEIVE_ONLY: + n = snprintf(dst, len, "a=recvonly\n"); + break; + case SDP_MODE_SEND_ONLY: + n = snprintf(dst, len, "a=sendonly\n"); + break; + case SDP_MODE_SEND_AND_RECEIVE: + n = snprintf(dst, len, "a=sendrecv\n"); + break; + default: + return -URTC_ERR_SDP_MALFORMED; + break; + } + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + // write media attribute: rtcp mux + if (src->rtcp_mux) { + n = snprintf(dst, len, "a=rtcp-mux\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + } + + // write media attribute: rtcp rsize + if (src->rtcp_rsize) { + n = snprintf(dst, len, "a=rtcp-rsize\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + n -= n; + } + + // write dynamic profiles + for (int i = 0; i < src->video.count; i++) { + if (src->video.params[i].codec == SDP_CODEC_H264) { + n = snprintf(dst, len, "a=rtpmap:%d H264/%d\n", + src->video.params[i].type, + src->video.params[i].clock + ); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + } + } + + // write media attribute: media id + // TODO fix hardcoded media id + n = snprintf(dst, len, "a=mid:0\n"); + if (n < 0) return -URTC_ERR_SDP_MALFORMED; + if (n >= len) return -URTC_ERR_SDP_MALFORMED; + dst += n; + len -= n; + + return 0; +} diff --git a/src/sdp.h b/src/sdp.h new file mode 100644 index 0000000..b65b5e5 --- /dev/null +++ b/src/sdp.h @@ -0,0 +1,150 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _URTC_SDP_H +#define _URTC_SDP_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdbool.h> +#include <stdint.h> + + +// Maximum size of SDP string (in bytes) +#define SDP_MAX_SIZE 2048 + +#define SDP_MAX_USERNAME_SIZE 32 +#define SDP_MAX_SESSION_ID_SIZE 32 +#define SDP_MAX_SESSION_VERSION_SIZE 32 +#define SDP_MAX_SESSION_NAME_SIZE 32 + +#define SDP_MAX_BUNDLE_IDS 5 +#define SDP_MAX_BUNDLE_ID_SIZE 32 +#define SDP_MAX_RTP_PAYLOAD_TYPES 32 + + +typedef enum sdp_mode { + SDP_MODE_SEND_AND_RECEIVE = 0, + SDP_MODE_RECEIVE_ONLY, + SDP_MODE_SEND_ONLY +} sdp_mode_t; + +typedef enum sdp_media { + SDP_MEDIA_TYPE_NULL = 0, + SDP_MEDIA_TYPE_AUDIO, + SDP_MEDIA_TYPE_VIDEO, + SDP_MEDIA_TYPE_TEXT, + SDP_MEDIA_TYPE_APPLICATION, + SDP_MEDIA_TYPE_MESSAGE +} sdp_media_type_t; + +// Codecs recognized by SDP parser +typedef enum sdp_codec { + SDP_CODEC_NULL = 0, + SDP_CODEC_H264, + SDP_CODEC_VP9 +} sdp_codec_t; + +// Dynamic payload type +typedef struct sdp_rtpmap { + unsigned int type; // Dynamic RTP payload type (e.g. 96) + enum sdp_codec codec; // H264, VP9, etc. + unsigned int clock; // Typically 90kHz for video + unsigned int flags; +} sdp_rtpmap_t; + +typedef struct sdp { + // protocol version + uint8_t version; + + // originator and session identifier + char username[SDP_MAX_USERNAME_SIZE+1]; + char session_id[SDP_MAX_SESSION_ID_SIZE+1]; + char session_version[SDP_MAX_SESSION_VERSION_SIZE+1]; + + // session name + char session_name[SDP_MAX_SESSION_NAME_SIZE+1]; + + // time description (mandatory) + uint64_t start_time; + uint64_t stop_time; + + // session attributes + + // bundle media identification tags + char mid[SDP_MAX_BUNDLE_IDS][SDP_MAX_BUNDLE_ID_SIZE+1]; + + // ice + char ufrag[4*256]; // ice-ufrag (256 unicode chars max.) + char pwd[4*256]; // ice-pwd (256 unicode chars max.) + struct { + bool trickle; + } ice_options; + + // video media + struct { + uint16_t port; + struct sdp_rtpmap params[SDP_MAX_RTP_PAYLOAD_TYPES]; + int count; + } video; + + sdp_mode_t mode; // send, receive, and send-and-receive + + bool rtcp_mux; // is rtcp multiplexed on same socket + bool rtcp_rsize; + + union { + uint8_t sha256[32]; // certificate fingerprint + } fingerprint; + +} sdp_t; + + +/** + * Parse SDP string into structure + * + * \param dst[out] SDP structure + * \param src[in] NULL-terminated SDP string + * + * \return 0 on success, negative on error. + */ +int sdp_parse(struct sdp *dst, const char *src); + +/** + * Serialize SDP structure into string + * + * \param dst[out] NULL-terminated SDP string + * \param len[in] Capacity of dst + * \param src[in] SDP structure + * + * \return 0 on success, negative on error. + */ +int sdp_serialize(char *dst, size_t len, const struct sdp *src); + +#ifdef __cplusplus +} +#endif + +#endif /* _URTC_SDP_H */ diff --git a/src/urtc.c b/src/urtc.c new file mode 100644 index 0000000..892b632 --- /dev/null +++ b/src/urtc.c @@ -0,0 +1,441 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <assert.h> // assert +#include <errno.h> // errno +#include <poll.h> // poll +#include <pthread.h> // pthread_create +#include <stdbool.h> // true +#include <stdio.h> // fprintf +#include <stdlib.h> // calloc, free +#include <string.h> // strerror +#include <unistd.h> // close + +#include <arpa/inet.h> // inet_ntoa +#include <netinet/in.h> // IPPROTO_UDP +#include <sys/socket.h> // socket +#include <sys/types.h> + +#include "err.h" +#include "log.h" +#include "mdns.h" // mdns_subscribe, mdns_unsubscribe +#include "prng.h" // prng_init +#include "sdp.h" +#include "urtc.h" +#include "uuid.h" // uuid_create_str + +#define RX_BUF_CAP 2048 // receive buffer capacity + +#define POLL_TIMEOUT_MS 50 // poll() timeout (in milliseconds) + +enum signaling_state { + SIGNALING_STATE_STABLE = 0, + SIGNALING_STATE_HAVE_LOCAL_OFFER, + SIGNALING_STATE_HAVE_REMOTE_OFFER, + SIGNALING_STATE_HAVE_LOCAL_PRANSWER, + SIGNALING_STATE_HAVE_REMOTE_PRANSWER, +}; + +enum rtc_state { + STATE_NEW = 0, + + STATE_ICE_NEW, + STATE_ICE_GATHERING, + STATE_ICE_COMPLETE, + + STATE_CONNECTING, + + STATE_CONNECTED, + + STATE_DISCONNECTED, + + STATE_FAILED, + + STATE_CLOSED, + + NUM_STATES // must be last +}; + +enum rtc_event { + EVENT_SOCKET = 0, + EVENT_TIMER, + EVENT_MDNS, + NUM_EVENTS, // must be last +}; + +struct peerconn { + // socket file descriptor + int sockfd; + + // execution thread + pthread_t thread; + + // poll file descriptors + struct pollfd fds[NUM_EVENTS]; + + // callbacks + urtc_on_ice_candidate *on_ice_candidate; + urtc_force_idr *force_idr; + + // stun servers + const char **stun; + + // state machine + enum signaling_state ss; + + // local and remote descriptions + struct sdp ldesc, rdesc; + + // mDNS related state + struct { + char hostname[UUID_STR_LEN]; // .local hostname + int sockfd; // port 5353 listener + } mdns; +}; + + +typedef int (*event_handler)(struct peerconn *pc); + +const enum rtc_state state_table[NUM_STATES][NUM_EVENTS] = { + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW }, + { STATE_NEW, STATE_NEW } +}; + +/** + * Handle incoming STUN packet + * + * \param pc Peer connection. + * + * \return 0 on success, negative on error. + */ +static int stun_handler( + struct peerconn *pc, + const uint8_t *pkt, + size_t n +) { + return 0; +} + +/** + * Handle incoming DTLS packet + * + * \param pc Peer connection. + * + * \return 0 on success, negative on error. + */ +static int dtls_handler( + struct peerconn *pc, + const uint8_t *pkt, + size_t n +) { + return 0; +} + +/** + * Handle incoming SRTP (or SRTCP) packet + * + * \param pc Peer connection. + * + * \return 0 on success, negative on error. + */ +static int rtp_handler( + struct peerconn *pc, + const uint8_t *pkt, + size_t n +) { + return 0; +} + +/** + * Handle incoming packet + * + * Packet may be a DTLS, SRTP, SRTCP, or STUN packet. Other packet types + * are discarded. + * + * \param pc Peer connection. + * + * \return 0 on success, negative on error. + */ +static int socket_event_handler(struct peerconn *pc) { + uint8_t buffer[RX_BUF_CAP]; + struct sockaddr_in ra; + socklen_t ralen; + ssize_t n; + + // read packet + ralen = sizeof(ra); + n = recvfrom( + pc->sockfd, + buffer, + sizeof(buffer), + 0, + (struct sockaddr *)(&ra), + &ralen + ); + + // rtp + if ((127 < buffer[0]) && (buffer[0] < 192)) { + log(INFO, "[rtp] %s", inet_ntoa(ra.sin_addr)); + rtp_handler(pc, buffer, n); + } else + // dtls + if ((19 < buffer[0]) && (buffer[0] < 64)) { + log(INFO, "[dtls] %s", inet_ntoa(ra.sin_addr)); + dtls_handler(pc, buffer, n); + } else + // stun + if (buffer[0] < 2) { + log(INFO, "[stun] %s", inet_ntoa(ra.sin_addr)); + stun_handler(pc, buffer, n); + } + + return 0; +} + +/** + * Handle timer event + * + * May need to: + * - resend STUN packet + * - resend DTLS packet + * - expire ICE candidate? + * + * \param pc Peer connection. + * + * \return 0 on success, negative on error. + */ +static int timer_event_handler(struct peerconn *pc) { + return 0; +} + +/** + * Handle incoming mDNS query + * + * \param pc Peer connection. + * + * \return 0 on success, negative on error. + */ +static int mdns_handler(struct peerconn *pc) { + uint8_t buffer[RX_BUF_CAP]; + ssize_t n; + + // read packet + if (n = recvfrom( + pc->mdns.sockfd, + buffer, + sizeof(buffer), + 0, + NULL, + NULL + ), -1 == n) { + log(ERROR, "%s", strerror(errno)); + goto _fail_recvfrom; + } + + // if valid query for peer connection's ephemeral hostname... + int type = mdns_validate_query(buffer, n, pc->mdns.hostname); + if (type > 0) { + if (type | TYPE_A) { + log(DEBUG, "[mdns] received A query"); + // ...respond to query with interface addresses + mdns_send_response(pc->mdns.sockfd, pc->mdns.hostname); + } + if (type | TYPE_AAAA) { + log(DEBUG, "[mdns] received AAAA query"); + } + } + + return 0; + +_fail_recvfrom: + return -URTC_ERR; +} + +const event_handler action_table[NUM_STATES][NUM_EVENTS] = { + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL }, + { NULL, NULL, NULL } +}; + +/** + * Runloop finite state machine (mealy) for handling timer and receive events + */ + +// send stun request +// wait for stun reply +// timeout -> resend request + +// called dir caller +// ------ --- ------ +// setRemoteDescription(offer) <-- offer = createOffer() +// setLocalDescription(offer) +// answer = createAnswer() --> setRemoteDescription(answer) +// setLocalDescription(answer) +// +// cand = onIceCandidate --> addIceCandidate(cand) +// addIceCandidate(cand) <-- cand = onIceCandidate +// ... +// +// (connection established) +// +// (dtls handshake) +// +// srtp --> +// <-- rtcp, nack + +/** + * Execution thread per peer connection + * + * \param arg Peer connection + * + * \return Unused. + */ +static void * runloop(void *arg) { + struct peerconn *pc; + enum rtc_event event; + int n; + + pc = (struct peerconn *)arg; + assert(pc); + +_loop: + // block indefinitely (-1 timeout) until i/o event + n = poll(pc->fds, NUM_EVENTS, -1); + assert(n > 0); + + // which event(s) occurred? + if (pc->fds[EVENT_SOCKET].revents & POLLIN) { + event = EVENT_SOCKET; + } else + if (pc->fds[EVENT_MDNS].revents & POLLIN) { + mdns_handler(pc); + } else + if (pc->fds[EVENT_TIMER].revents & POLLIN) { + event = EVENT_TIMER; + } + + goto _loop; + + + return NULL; +}; + +urtc_peerconn_t * urtc_peerconn_create(const char *stun[]) { + // seend pseudorandom number generator + prng_init(); + + // allocate peer connection + struct peerconn *pc = (struct peerconn *)calloc(1, sizeof(struct peerconn)); + if (!pc) return pc; + + // copy pointer to stun servers + pc->stun = stun; + + // open udp socket (for all dtls/srtp/srtcp/stun/turn communication) + pc->sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (-1 == pc->sockfd) goto _fail_socket; + pc->fds[EVENT_SOCKET] = (struct pollfd){ pc->sockfd, POLLIN }; + + // generate a unique local mDNS hostname + uuid_create_str(pc->mdns.hostname); + log(INFO, "mDNS hostname is %s.local", pc->mdns.hostname); + + // open multicast udp socket for replying to mDNS queries + pc->mdns.sockfd = mdns_subscribe(); + if (-1 == pc->mdns.sockfd) goto _fail_mdns_subscribe; + pc->fds[EVENT_MDNS] = (struct pollfd){ + pc->mdns.sockfd, + POLLIN + }; + + // start new thread per peer connection + if (0 != pthread_create( + &(pc->thread), + NULL, + runloop, + pc + )) goto _fail_pthread_create; + + return pc; + +_fail_pthread_create: + mdns_unsubscribe(pc->mdns.sockfd); +_fail_mdns_subscribe: + close(pc->sockfd); +_fail_socket: + free(pc); + + return NULL; +} + +int urtc_set_on_ice_candidate(struct peerconn *pc, urtc_on_ice_candidate *cb) { + if (!pc) return -1; + if (!cb) return -1; + pc->on_ice_candidate = cb; + + return -URTC_ERR_NOT_IMPLEMENTED; +} + +int urtc_add_ice_candidate(struct peerconn *pc, const char *cand) { + return -URTC_ERR_NOT_IMPLEMENTED; +} + +int urtc_create_answer(struct peerconn *pc, char **answer) { + return -URTC_ERR_NOT_IMPLEMENTED; +} + +int urtc_create_offer(struct peerconn *pc, char **offer) { + return -URTC_ERR_NOT_IMPLEMENTED; +} + +int urtc_set_remote_description(struct peerconn *pc, const char *desc) { + return -URTC_ERR_NOT_IMPLEMENTED; +} + +int urtc_set_local_description(struct peerconn *pc, const char *desc) { + return -URTC_ERR_NOT_IMPLEMENTED; +} + +void urtc_peerconn_destroy(struct peerconn *pc) { + if (pc) { + pthread_cancel(pc->thread); + pthread_join(pc->thread, NULL); + mdns_unsubscribe(pc->mdns.sockfd); + shutdown(pc->sockfd, SHUT_RDWR); + close(pc->sockfd); + free(pc); + } +} diff --git a/src/urtc.h b/src/urtc.h new file mode 100644 index 0000000..3da0947 --- /dev/null +++ b/src/urtc.h @@ -0,0 +1,223 @@ +/** + * \file urtc.h + * + * \brief liburtc header file. + * + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +/** + * \mainpage notitle + * + * The reference WebRTC implementation, libwebrtc, was developed by Google + * for the Chrome web browser. It's codebase is large (over 10GB of source), + * uses uncommon build tools (Bazel), and produces large executables not + * well suited for constrained embedded devices. + * + * liburtc is designed with embedded devices in mind. Only functionality + * commonly found on embedded devices is implemented. For example, only + * the H.264 video codec is supported (there is no VP8/VP9 support) as + * most embedded devices with hardware-accelerated video encoders only + * support H.264. + * + * \section features_sec Features + * * Small footprint (< 100KB binary) + * * H.264 support only (no VP8/9 support) + * * ANSI C99 + * + */ +#ifndef _URTC_H +#define _URTC_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * Opque peer connection structure. + * + * Instantiate via urtc_peerconn_create(). Each peer connection creates its + * own single thread for processing events in a runloop. + */ +typedef struct peerconn urtc_peerconn_t; + +/** + * (callback) Called for each new local ICE candidate discovered + * + * The local candidate should be relayed to the remote peer. Note that callback + * executes on peer connection event loop -- do not block or do other expensive + * work within the callback. + * + * Akin to the `onicecandidate` event handler in `RTCPeerConnection`. + * + * \param cand Discovered local candidate string. + * \param arg User specified argument, see urtc_set_on_ice_candidate(). + * + * \return 0 on success, negative on error. + */ +typedef int (urtc_on_ice_candidate)(const char *cand, void *arg); + +/** + * (callback) Called to request that video encoder immediately generate an IDR + * + * H.264 video encoders produce I-frames and P-frames. Only I-frames can be + * decoded independently. To minimize the time-to-first-frame (TTFF), an + * I-frame should be sent as soon as a peer connection is established. In the + * event of picture loss, an I-frame should be sent as soon as possible to + * re-establish picture. + * + * This is an optional callback. If set, it improves the TTFF and picture + * recovery time from loss of picture. + */ +typedef void (urtc_force_idr)(); + + +/** + * Create a new peer connection + * + * Note that the new peer connection is not yet connected to a peer. + * + * Akin to `RTCPeerConnection()` in the WebRTC JS API. + * + * \param stun Array of STUN servers to use for discovery of server-reflexive + * ICE candidates. Each entry should be a string of the form + * `hostname[:port]` (e.g. "stun.l.google.com:19302"). The port + * is optional -- if omitted, 3478 is assumed. The final entry in + * the array must be NULL. If no STUN servers are provided, only + * local area network peers will be discoverable. + * + * \return On success, a pointer to new peer connection object is returned. + * The peer connection must be destroyed with urtc_peerconn_destroy() + * when no longer needed. On error, NULL is returned. + */ +urtc_peerconn_t * urtc_peerconn_create(const char *stun[]); + +/** + * Sets onIceCandidate callback function + * + * Callback function will be called when a new local ICE candidate is + * discovered. + */ +int urtc_set_on_ice_candidate(urtc_peerconn_t *pc, urtc_on_ice_candidate *cb); + +/** + * Adds received remote ICE candidate to peer connection + * + * For each ICE candidate received from the remote peer via some external + * signaling channel, use this function to add the candidate to the peer + * connection. Candidates are asynchronously used to check for direct + * peer-to-peer connectivity with the remote peer. + * + * Akin to `addIceCandidate` method of `RTCPeerConnection` in the WebRTC JS API. + * + * \param pc Peer connection. + * \param cand An ICE candidate string from remote peer. + * + * \return 0 on success, negative on error. + */ +int urtc_add_ice_candidate(urtc_peerconn_t *pc, const char *cand); + +/** + * Creates local description for an answering peer connection + * + * When a peer connection is the answering party, generates a local + * description (in Session Description Protocol). This description + * should be both sent to remote peer connection via some external + * signaling channel as well as added to the local peer connection via + * urtc_set_local_description(). + * + * Akin to `createAnswer` method of `RTCPeerConnection` in WebRTC JS API. + * + * \param pc Peer connection + * \param answer Pointer to string pointer pointing to generated answer. + * Memory internally managed (caller need not and must not free). + * + * \return 0 on success, negative on error. + */ +int urtc_create_answer(urtc_peerconn_t *pc, char **answer); + +/** + * Creates a local description for an offering peer connection + * + * When a peer connection is the offering party, this function generates a + * local description (in Session Description Protocol). This description + * should be both sent to the remote peer connection via some external + * signaling channel as well as added to the local peer connection via + * urtc_set_local_description(). + * + * Akin to `createOffer` method of `RTCPeerConnection` in WebRTC JS API. + * + * \param pc Peer connection + * \param offer Pointer to string pointer pointing to generated offer. + * Memory interally managed (caller need no and must not free). + * + * \return 0 on success, negative on error. + */ +int urtc_create_offer(urtc_peerconn_t *pc, char **offer); + +/** + * Sets local description for peer connection + * + * The local description is a Session Description Protocol string, typically + * generated by urtc_create_offer() or urtc_create_answer(), depending on + * whether the local peer connection is the offering or answering party, + * respectively. Setting the local description begins local ICE candidate + * discovery. + * + * Akin to `setLocalDescription` method of `RTCPeerConnection` in WebRTC JS API. + * + * \param pc Peer connection previously created via urtc_peerconn_create(). + * \param desc Local description in Session Description Protocol (SDP) + * + * \return 0 on success, negative on error. + */ +int urtc_set_local_description(urtc_peerconn_t *pc, const char *desc); + +/** + * Sets remote description + * + * The remote description is a Session Description Protocol string, + * received from the remote peer via some external signaling channel. + * Amongst other things, it defines the set of media codecs the remote + * peer supports. + * + * Akin to `setRemoteDescription` method of `RTCPeerConnection` in WebRTC JS + * API. + * + * \param pc Peer connection created by urtc_peerconn_create(). + * \param desc Session description protocol. + * + * \return 0 on success, negative on error. + */ +int urtc_set_remote_description(urtc_peerconn_t *pc, const char *desc); + +/** + * Tears down peer connection, closing and freeing all resources + * + * \param pc Peer connection. + */ +void urtc_peerconn_destroy(urtc_peerconn_t *pc); + +#ifdef __cplusplus +} +#endif + +#endif /* _URTC_H */ diff --git a/src/uuid.c b/src/uuid.c new file mode 100644 index 0000000..6dfa4c1 --- /dev/null +++ b/src/uuid.c @@ -0,0 +1,76 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +/** + * Pseudo-random univerally-unique identifier generator [^RFC4122]. + * + * [^RFC4122]: https://tools.ietf.org/html/rfc4122#section-4.4 + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "prng.h" +#include "uuid.h" + +/** + * Generate a pseudo-random UUID. + * + * \return Populated UUID. + */ +struct uuid uuid_create() { + struct uuid u; + + // fill with randomness + prng(&u, sizeof(u)); + + // set reserved and version bits + u.clk_seq_hi_and_reserved = (u.clk_seq_hi_and_reserved & 0x3F) | 0x80; + u.time_hi_and_version = (u.time_hi_and_version & 0x0FFF) | 0x4000; + + return u; +} + +/** + * Generate pseudorandom UUID (as a string) + * + * \param s Destination string memory. + * + */ +void uuid_create_str(char s[UUID_STR_LEN]) { + struct uuid u = uuid_create(); + + sprintf(s, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", + u.time_low, + u.time_mid, + u.time_hi_and_version, + u.clk_seq_hi_and_reserved, + u.clk_seq_low, + u.node[0], + u.node[1], + u.node[2], + u.node[3], + u.node[4], + u.node[5] + ); +} diff --git a/src/uuid.h b/src/uuid.h new file mode 100644 index 0000000..464f33e --- /dev/null +++ b/src/uuid.h @@ -0,0 +1,54 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _URTC_UUID_H +#define _URTC_UUID_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdint.h> + +#define UUID_SIZE sizeof(struct uuid) + +#define UUID_STR_LEN (32 + 4 + 1) // 16 hex octets, 4 dashes, 1 null terminator + +struct __attribute__((__packed__)) uuid { + uint32_t time_low; + uint16_t time_mid; + uint16_t time_hi_and_version; + uint8_t clk_seq_hi_and_reserved; + uint8_t clk_seq_low; + uint8_t node[6]; +}; + +struct uuid uuid_create(); + +void uuid_create_str(char uuid[UUID_STR_LEN]); + +#ifdef __cplusplus +} +#endif + +#endif // _URTC_UUID_H diff --git a/tests/Makefile.am b/tests/Makefile.am new file mode 100644 index 0000000..27ebf83 --- /dev/null +++ b/tests/Makefile.am @@ -0,0 +1,32 @@ +# Build test programs (run with 'make check') +TESTS = $(check_PROGRAMS) +check_PROGRAMS = \ + g711_test \ + mdns_test \ + sdp_test \ + uuid_test + +g711_test_CFLAGS = -I$(top_srcdir)/src +g711_test_SOURCES = \ + g711_test.c \ + $(top_srcdir)/src/g711.c \ + $(top_srcdir)/src/g711_tables.c +g711_test_LDADD = $(top_builddir)/src/liburtc.la + +mdns_test_CFLAGS = -I$(top_srcdir)/src +mdns_test_SOURCES = \ + mdns_test.c \ + $(top_srcdir)/src/mdns.c +mdns_test_LDADD = $(top_builddir)/src/liburtc.la + +sdp_test_CFLAGS = -I$(top_srcdir)/src +sdp_test_SOURCES = \ + sdp_test.c \ + $(top_srcdir)/src/sdp.c +sdp_test_LDADD = $(top_builddir)/src/liburtc.la + +uuid_test_CFLAGS = -I$(top_srcdir)/src +uuid_test_SOURCES = \ + uuid_test.c \ + $(top_srcdir)/src/uuid.c +uuid_test_LDADD = $(top_builddir)/src/liburtc.la diff --git a/tests/g711_test.c b/tests/g711_test.c new file mode 100644 index 0000000..2e6aa53 --- /dev/null +++ b/tests/g711_test.c @@ -0,0 +1,53 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "g711.h" + + +int main(int argc, char **argv) { + + { + const int16_t src[] = { + 0, + 4096, + 8192, + -8192, + -4096 + }; + uint8_t dst[sizeof(src) / sizeof(int16_t)]; + g711_encode(dst, src, sizeof(src) / sizeof(int16_t)); + } + + { + const uint8_t src[] = { + 0x00, + 0x7f, + 0x80, + 0xff, + }; + int16_t dst[sizeof(src) / sizeof(uint8_t)]; + g711_decode(dst, src, sizeof(src) / sizeof(uint8_t)); + } + + return 0; +} diff --git a/tests/mdns_test.c b/tests/mdns_test.c new file mode 100644 index 0000000..8604696 --- /dev/null +++ b/tests/mdns_test.c @@ -0,0 +1,66 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <assert.h> +#include <stdint.h> + +#include "mdns.h" + +const uint8_t response[] = { + // header + 0x00, 0x00, // transaction id + 0x84, 0x00, // flags + 0x00, 0x01, // questions + 0x00, 0x02, // answer RRs + 0x00, 0x00, // authority RRs + 0x00, 0x00, // additional RRs + + // query + 0x07, 0x6c, 0x69, 0x62, 0x75, 0x72, 0x74, 0x63, // "liburtc" + 0x05, 0x6c, 0x6f, 0x63, 0x61, 0x6c, // "local" + 0x00, // root record + 0x00, 0xff, // type: any + 0x80, 0x01, // class: unicast | in(ternet) + + // answer + 0xc0, 0x0c, // name + 0x00, 0x1c, // type: AAAA + 0x00, 0x01, // class: in(ternet) + 0x00, 0x00, 0x00, 0x0a, // ttl + 0x00, 0x10, // size + 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // IPv6 + 0x72, 0x85, 0xc2, 0xff, 0xfe, 0x07, 0x1f, 0x03, // IPv6 (continued) + + // answer + 0xc0, 0x0c, // name + 0x00, 0x01, // type: A + 0x00, 0x01, // class: in(ternet) + 0x00, 0x00, 0x00, 0x0a, // ttl + 0x00, 0x04, // size + 0xc0, 0xa8, 0x01, 0x64 // IPv4 +}; + +int main(int argc, char **argv) { + assert(0 == mdns_parse_response(response, sizeof(response))); + return 0; +} diff --git a/tests/sdp_test.c b/tests/sdp_test.c new file mode 100644 index 0000000..c5c210c --- /dev/null +++ b/tests/sdp_test.c @@ -0,0 +1,328 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "err.h" +#include "sdp.h" + +// Chrome 73.0.3683.103 (Official Build) (64-bit) +const char *chrome = + "v=0\n" + "o=- 2136573259711410686 2 IN IP4 127.0.0.1\n" + "s=-\n" + "t=0 0\n" + "a=group:BUNDLE 0\n" + "a=msid-semantic: WMS\n" + "m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102 122 127 121 125 107 108 109 124 120 123 119 114 115 116\n" + "c=IN IP4 0.0.0.0\n" + "a=rtcp:9 IN IP4 0.0.0.0\n" + "a=ice-ufrag:DPkQ\n" + "a=ice-pwd:23oU5vsiyBKLHbND/Ql8f7gZ\n" + "a=ice-options:trickle\n" + "a=fingerprint:sha-256 D0:44:DF:68:71:39:56:0B:D3:61:7A:F2:42:5B:1B:0A:CD:B2:72:84:3A:DE:0F:22:CA:8C:B0:06:0A:8D:A2:00\n" + "a=setup:actpass\n" + "a=mid:0\n" + "a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\n" + "a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\n" + "a=extmap:4 urn:3gpp:video-orientation\n" + "a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\n" + "a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay\n" + "a=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type\n" + "a=extmap:8 http://www.webrtc.org/experiments/rtp-hdrext/video-timing\n" + "a=extmap:10 http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07\n" + "a=extmap:12 http://www.webrtc.org/experiments/rtp-hdrext/color-space\n" + "a=extmap:9 urn:ietf:params:rtp-hdrext:sdes:mid\n" + "a=extmap:13 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\n" + "a=extmap:14 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\n" + "a=recvonly\n" + "a=rtcp-mux\n" + "a=rtcp-rsize\n" + "a=rtpmap:96 VP8/90000\n" + "a=rtcp-fb:96 goog-remb\n" + "a=rtcp-fb:96 transport-cc\n" + "a=rtcp-fb:96 ccm fir\n" + "a=rtcp-fb:96 nack\n" + "a=rtcp-fb:96 nack pli\n" + "a=rtpmap:97 rtx/90000\n" + "a=fmtp:97 apt=96\n" + "a=rtpmap:98 VP9/90000\n" + "a=rtcp-fb:98 goog-remb\n" + "a=rtcp-fb:98 transport-cc\n" + "a=rtcp-fb:98 ccm fir\n" + "a=rtcp-fb:98 nack\n" + "a=rtcp-fb:98 nack pli\n" + "a=fmtp:98 profile-id=0\n" + "a=rtpmap:99 rtx/90000\n" + "a=fmtp:99 apt=98\n" + "a=rtpmap:100 VP9/90000\n" + "a=rtcp-fb:100 goog-remb\n" + "a=rtcp-fb:100 transport-cc\n" + "a=rtcp-fb:100 ccm fir\n" + "a=rtcp-fb:100 nack\n" + "a=rtcp-fb:100 nack pli\n" + "a=fmtp:100 profile-id=2\n" + "a=rtpmap:101 rtx/90000\n" + "a=fmtp:101 apt=100\n" + "a=rtpmap:102 H264/90000\n" + "a=rtcp-fb:102 goog-remb\n" + "a=rtcp-fb:102 transport-cc\n" + "a=rtcp-fb:102 ccm fir\n" + "a=rtcp-fb:102 nack\n" + "a=rtcp-fb:102 nack pli\n" + "a=fmtp:102 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f\n" + "a=rtpmap:122 rtx/90000\n" + "a=fmtp:122 apt=102\n" + "a=rtpmap:127 H264/90000\n" + "a=rtcp-fb:127 goog-remb\n" + "a=rtcp-fb:127 transport-cc\n" + "a=rtcp-fb:127 ccm fir\n" + "a=rtcp-fb:127 nack\n" + "a=rtcp-fb:127 nack pli\n" + "a=fmtp:127 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42001f\n" + "a=rtpmap:121 rtx/90000\n" + "a=fmtp:121 apt=127\n" + "a=rtpmap:125 H264/90000\n" + "a=rtcp-fb:125 goog-remb\n" + "a=rtcp-fb:125 transport-cc\n" + "a=rtcp-fb:125 ccm fir\n" + "a=rtcp-fb:125 nack\n" + "a=rtcp-fb:125 nack pli\n" + "a=fmtp:125 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\n" + "a=rtpmap:107 rtx/90000\n" + "a=fmtp:107 apt=125\n" + "a=rtpmap:108 H264/90000\n" + "a=rtcp-fb:108 goog-remb\n" + "a=rtcp-fb:108 transport-cc\n" + "a=rtcp-fb:108 ccm fir\n" + "a=rtcp-fb:108 nack\n" + "a=rtcp-fb:108 nack pli\n" + "a=fmtp:108 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f\n" + "a=rtpmap:109 rtx/90000\n" + "a=fmtp:109 apt=108\n" + "a=rtpmap:124 H264/90000\n" + "a=rtcp-fb:124 goog-remb\n" + "a=rtcp-fb:124 transport-cc\n" + "a=rtcp-fb:124 ccm fir\n" + "a=rtcp-fb:124 nack\n" + "a=rtcp-fb:124 nack pli\n" + "a=fmtp:124 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=4d0032\n" + "a=rtpmap:120 rtx/90000\n" + "a=fmtp:120 apt=124\n" + "a=rtpmap:123 H264/90000\n" + "a=rtcp-fb:123 goog-remb\n" + "a=rtcp-fb:123 transport-cc\n" + "a=rtcp-fb:123 ccm fir\n" + "a=rtcp-fb:123 nack\n" + "a=rtcp-fb:123 nack pli\n" + "a=fmtp:123 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640032\n" + "a=rtpmap:119 rtx/90000\n" + "a=fmtp:119 apt=123\n" + "a=rtpmap:114 red/90000\n" + "a=rtpmap:115 rtx/90000\n" + "a=fmtp:115 apt=114\n" + "a=rtpmap:116 ulpfec/90000\n"; + +// Safari 13.1 (14609.1.20.111.8) +const char *safari = + "v=0\n" + "o=- 3389190485417077944 2 IN IP4 127.0.0.1\n" + "s=-\n" + "t=0 0\n" + "a=group:BUNDLE 0\n" + "a=msid-semantic: WMS\n" + "m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 127 125 104\n" + "c=IN IP4 0.0.0.0\n" + "a=rtcp:9 IN IP4 0.0.0.0\n" + "a=ice-ufrag:yMtQ\n" + "a=ice-pwd:92GWQlqPVFfVjlxV2qSlQxEq\n" + "a=ice-options:trickle\n" + "a=fingerprint:sha-256 D7:41:A3:34:FC:54:27:FD:D1:2A:58:1D:9E:01:8A:C8:A9:F3:E0:BE:66:B3:D9:58:FC:7D:59:A7:BA:D6:99:F3\n" + "a=setup:actpass\n" + "a=mid:0\n" + "a=extmap:14 urn:ietf:params:rtp-hdrext:toffset\n" + "a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\n" + "a=extmap:13 urn:3gpp:video-orientation\n" + "a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\n" + "a=extmap:12 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay\n" + "a=extmap:11 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type\n" + "a=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-timing\n" + "a=extmap:8 http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07\n" + "a=extmap:9 http://www.webrtc.org/experiments/rtp-hdrext/color-space\n" + "a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\n" + "a=extmap:5 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\n" + "a=extmap:6 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\n" + "a=sendrecv\n" + "a=msid:- d770ebc2-b725-4de0-8314-a76a8a67695e\n" + "a=rtcp-mux\n" + "a=rtcp-rsize\n" + "a=rtpmap:96 H264/90000\n" + "a=rtcp-fb:96 goog-remb\n" + "a=rtcp-fb:96 transport-cc\n" + "a=rtcp-fb:96 ccm fir\n" + "a=rtcp-fb:96 nack\n" + "a=rtcp-fb:96 nack pli\n" + "a=fmtp:96 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640c1f\n" + "a=rtpmap:97 rtx/90000\n" + "a=fmtp:97 apt=96\n" + "a=rtpmap:98 H264/90000\n" + "a=rtcp-fb:98 goog-remb\n" + "a=rtcp-fb:98 transport-cc\n" + "a=rtcp-fb:98 ccm fir\n" + "a=rtcp-fb:98 nack\n" + "a=rtcp-fb:98 nack pli\n" + "a=fmtp:98 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\n" + "a=rtpmap:99 rtx/90000\n" + "a=fmtp:99 apt=98\n" + "a=rtpmap:100 VP8/90000\n" + "a=rtcp-fb:100 goog-remb\n" + "a=rtcp-fb:100 transport-cc\n" + "a=rtcp-fb:100 ccm fir\n" + "a=rtcp-fb:100 nack\n" + "a=rtcp-fb:100 nack pli\n" + "a=rtpmap:101 rtx/90000\n" + "a=fmtp:101 apt=100\n" + "a=rtpmap:127 red/90000\n" + "a=rtpmap:125 rtx/90000\n" + "a=fmtp:125 apt=127\n" + "a=rtpmap:104 ulpfec/90000\n" + "a=ssrc-group:FID 737915040 1139142965\n" + "a=ssrc:737915040 cname:uGvMyunFXUYJjCuf\n" + "a=ssrc:737915040 msid:- d770ebc2-b725-4de0-8314-a76a8a67695e\n" + "a=ssrc:737915040 mslabel:-\n" + "a=ssrc:737915040 label:d770ebc2-b725-4de0-8314-a76a8a67695e\n" + "a=ssrc:1139142965 cname:uGvMyunFXUYJjCuf\n" + "a=ssrc:1139142965 msid:- d770ebc2-b725-4de0-8314-a76a8a67695e\n" + "a=ssrc:1139142965 mslabel:-\n" + "a=ssrc:1139142965 label:d770ebc2-b725-4de0-8314-a76a8a67695e\n"; + +int main(int argc, char **argv) { + + // Test SDP deserialize + { + sdp_t sdp; + assert(-URTC_ERR_BAD_ARGUMENT == sdp_parse(&sdp, NULL)); + assert(0 == sdp_parse(&sdp, "")); + } + + { + sdp_t sdp; + assert(0 == sdp_parse(&sdp, chrome)); + assert(0 == sdp.version); + assert(0 == sdp.start_time); + assert(0 == sdp.stop_time); + + } + + // Test parser against Chrome offer + { + sdp_t sdp; + assert(0 == sdp_parse(&sdp, chrome)); + assert(0 == sdp.version); + assert(0 == strcmp("-", sdp.username)); + assert(0 == strcmp("2136573259711410686", sdp.session_id)); + assert(0 == strcmp("2", sdp.session_version)); + assert(0 == sdp.start_time); + assert(0 == sdp.stop_time); + { + assert(21 == sdp.video.count); + assert(9 == sdp.video.port); + unsigned int expected_type[] = { + 96, 97, 98, 99, 100, 101, 102, 122, 127, 121, + 125, 107, 108, 109, 124, 120, 123, 119, 114, 115, + 116 + }; + for (int i = 0; i < sdp.video.count; i++) { + assert(expected_type[i] == sdp.video.params[i].type); + } + } + assert(0 == strcmp("DPkQ", sdp.ufrag)); + assert(0 == strcmp("23oU5vsiyBKLHbND/Ql8f7gZ", sdp.pwd)); + assert(true == sdp.ice_options.trickle); + { + uint8_t expected_fingerprint[] = { + 0xD0, 0x44, 0xDF, 0x68, 0x71, 0x39, 0x56, 0x0B, + 0xD3, 0x61, 0x7A, 0xF2, 0x42, 0x5B, 0x1B, 0x0A, + 0xCD, 0xB2, 0x72, 0x84, 0x3A, 0xDE, 0x0F, 0x22, + 0xCA, 0x8C, 0xB0, 0x06, 0x0A, 0x8D, 0xA2, 0x00 + }; + assert(0 == memcmp(sdp.fingerprint.sha256, expected_fingerprint, 32)); + } + assert(SDP_MODE_RECEIVE_ONLY == sdp.mode); + assert(true == sdp.rtcp_mux); + assert(true == sdp.rtcp_rsize); + } + + // Test parser against Safari offer + { + sdp_t sdp; + assert(0 == sdp_parse(&sdp, safari)); + assert(0 == sdp.version); + assert(0 == strcmp("-", sdp.username)); + assert(0 == strcmp("3389190485417077944", sdp.session_id)); + assert(0 == strcmp("2", sdp.session_version)); + assert(0 == sdp.start_time); + assert(0 == sdp.stop_time); + { + assert(9 == sdp.video.count); + assert(9 == sdp.video.port); + unsigned int expected_type[] = { + 96, 97, 98, 99, 100, 101, 127, 125, 104 + }; + for (int i = 0; i < sdp.video.count; i++) { + assert(expected_type[i] == sdp.video.params[i].type); + } + } + assert(0 == strcmp("yMtQ", sdp.ufrag)); + assert(0 == strcmp("92GWQlqPVFfVjlxV2qSlQxEq", sdp.pwd)); + assert(true == sdp.ice_options.trickle); + { + uint8_t expected_fingerprint[] = { + 0xD7, 0x41, 0xA3, 0x34, 0xFC, 0x54, 0x27, 0xFD, + 0xD1, 0x2A, 0x58, 0x1D, 0x9E, 0x01, 0x8A, 0xC8, + 0xA9, 0xF3, 0xE0, 0xBE, 0x66, 0xB3, 0xD9, 0x58, + 0xFC, 0x7D, 0x59, 0xA7, 0xBA, 0xD6, 0x99, 0xF3 + }; + assert(0 == memcmp(sdp.fingerprint.sha256, expected_fingerprint, 32)); + } + assert(SDP_MODE_SEND_AND_RECEIVE == sdp.mode); + assert(true == sdp.rtcp_mux); + assert(true == sdp.rtcp_rsize); + } + + // Test SDP serialize + { + char str[2048]; + sdp_t sdp = { + .ice_options.trickle = true, + .rtcp_mux = true + }; + assert(0 == sdp_serialize(str, sizeof(str), &sdp)); + fprintf(stderr, "%s", str); + } + + return 0; +} diff --git a/tests/str_test.c b/tests/str_test.c new file mode 100644 index 0000000..58e6a20 --- /dev/null +++ b/tests/str_test.c @@ -0,0 +1,31 @@ +/* + * liburtc + * Copyright (C) 2019 Chris Hiszpanski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "string.h" + +int main(int argc, char **argv) { + { + string_t *s = string_create_empty(3); + string_append(s, "one"); + string_append(s, "two"); + string_append(s, "three"); + string_destroy(s); + } + + return 0; +} diff --git a/tests/uuid_test.c b/tests/uuid_test.c new file mode 100644 index 0000000..a515005 --- /dev/null +++ b/tests/uuid_test.c @@ -0,0 +1,45 @@ +/** + * liburtc + * Copyright 2020 Chris Hiszpanski + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <assert.h> +#include <stdio.h> + +#include "uuid.h" + +int main(int argc, char **argv) { + { + char sa[UUID_STR_LEN]; + + uuid_create_str(sa); + + assert(sa[ 8] == '-'); + assert(sa[13] == '-'); + assert(sa[14] == '4'); + assert(sa[18] == '-'); + assert(sa[19] == '8' || sa[19] == '9' || + sa[19] == 'a' || sa[19] == 'b'); + assert(sa[23] == '-'); + } + + return 0; +} |