diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/err.h | 88 | ||||
| -rw-r--r-- | src/g711.c | 58 | ||||
| -rw-r--r-- | src/g711.h | 36 | ||||
| -rw-r--r-- | src/g711_tables.c | 1470 | ||||
| -rw-r--r-- | src/log.h | 99 | ||||
| -rw-r--r-- | src/mdns.c | 949 | ||||
| -rw-r--r-- | src/mdns.h | 45 | ||||
| -rw-r--r-- | src/prng.c | 53 | ||||
| -rw-r--r-- | src/prng.h | 45 | ||||
| -rw-r--r-- | src/sdp.c | 1013 | ||||
| -rw-r--r-- | src/sdp.h | 177 | ||||
| -rw-r--r-- | src/urtc.c | 530 | ||||
| -rw-r--r-- | src/urtc.h | 48 | ||||
| -rw-r--r-- | src/uuid.c | 87 | ||||
| -rw-r--r-- | src/uuid.h | 57 |
15 files changed, 2426 insertions, 2329 deletions
@@ -1,26 +1,30 @@ -/* - * 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. +/** + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ + #ifndef _URTC_ERR_H #define _URTC_ERR_H @@ -29,26 +33,26 @@ 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 + 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 @@ -56,3 +60,5 @@ typedef enum err { #endif #endif /* _URTC_ERR_H */ + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,19 +1,27 @@ -/* - * liburtc - * Copyright (C) 2019 Chris Hiszpanski +/** + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. * - * 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. + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: * - * 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. + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #include <stdio.h> @@ -21,20 +29,22 @@ #include "g711.h" void g711_encode(uint8_t *dst, const int16_t *src, size_t n) { - int i; + int i; - for (i = 0; i < n; i++) { - dst[i] = pcm2ulaw[0x1FFF & (src[i] >> 3)]; - } + 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; + 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; - } + 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; + } } + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,19 +1,27 @@ -/* - * liburtc - * Copyright (C) 2019 Chris Hiszpanski +/** + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. * - * 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. + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: * - * 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. + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #ifndef URTC_G711_H @@ -66,3 +74,5 @@ void g711_decode(int16_t *dst, const uint8_t *src, size_t n); #endif #endif /* URTC_G711_H */ + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ diff --git a/src/g711_tables.c b/src/g711_tables.c index 0690d1a..f306a3d 100644 --- a/src/g711_tables.c +++ b/src/g711_tables.c @@ -1,19 +1,27 @@ -/* - * 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/>. +/** + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #include <stdint.h> @@ -22,724 +30,724 @@ /* 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, 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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, 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, - 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 }; @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #ifndef _URTC_LOG_H @@ -31,40 +34,40 @@ extern "C" { #endif enum level { - TRACE = 0, - DEBUG, - INFO, - WARN, - ERROR, - FATAL, - NUM_LEVELS // must be last + 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) + "\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) + "[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 + "\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 @@ -72,9 +75,9 @@ static const char *logr[NUM_LEVELS] = { #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); + do { \ + fprintf(stderr, "%s" AT " %s" format "%s", logl[lvl], logn[lvl], ##__VA_ARGS__, logr[lvl]); \ + } while (0); #ifdef _cplusplus } @@ -1,40 +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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #include <errno.h> -#include <net/if.h> // IFF_LOOPBACK (include pre ifaddrs.h) -#include <ifaddrs.h> // getifaddrs -#include <limits.h> // HOST_NAME_MAX +#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 <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 <sys/socket.h> // sendto, setsocketopt, socket #include "err.h" #include "log.h" @@ -46,7 +49,7 @@ #define DEFAULT_TTL 120 // time-to-live recommended by RFC 6762 -#define CLASS_INTERNET 1 +#define CLASS_INTERNET 1 #define CACHE_FLUSH (1 << 15) #define FLAG_RESPONSE (1 << 15) @@ -57,26 +60,26 @@ #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 + 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[]; + 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[]; + // variable length name precedes answer + uint16_t type; + uint16_t class; + uint32_t ttl; + uint16_t size; + uint8_t data[]; }; /** @@ -88,88 +91,88 @@ struct __attribute__((__packed__)) answer { * \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, + // 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, + SO_REUSEPORT, #else - SO_REUSEADDR, + 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; + &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); + close(sockfd); _fail_create_socket: - return -URTC_ERR; + return -URTC_ERR; } /** @@ -182,12 +185,12 @@ _fail_create_socket: * \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; - } + if (-1 == close(sockfd)) { + log(ERROR, "close: %s", strerror(errno)); + return -URTC_ERR; + } - return 0; + return 0; } /** @@ -198,52 +201,52 @@ int mdns_unsubscribe(int sockfd) { * \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; + // 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; } /** @@ -256,76 +259,76 @@ int mdns_query(const char *name) { */ 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; + // 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; } /** @@ -338,69 +341,69 @@ int mdns_parse_response(const void *response, size_t len) * \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; + 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; } /** @@ -417,72 +420,72 @@ static int match(const char *expected, const uint8_t *q, int *len) { */ 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; + 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; } /** @@ -493,115 +496,117 @@ int mdns_validate_query(const uint8_t *q, size_t n, const char *hostname) * \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; + 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; + return -URTC_ERR; } + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #ifndef _URTC_MDNS_H @@ -41,3 +44,5 @@ int mdns_parse_response(const void *response, size_t len); int mdns_query(const char *name); #endif // _URTC_MDNS_H + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #include <stdint.h> @@ -31,7 +34,7 @@ * Initialize pseudo-random number generator */ void prng_init() { - srand(time(NULL)); + srand(time(NULL)); } /** @@ -41,7 +44,9 @@ void prng_init() { * \param sz Size (in bytes) of destination memory */ void prng(void *dst, size_t sz) { - for (; sz; sz--) { - *(uint8_t *)dst++ = rand() & 0xFF; - } + for (; sz; sz--) { + *(uint8_t *)dst++ = rand() & 0xFF; + } } + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #ifndef _URTC_PRNG_H @@ -29,3 +32,5 @@ void prng_init(); void prng(void *dst, size_t sz); #endif // _URTC_PRNG_H + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #include <inttypes.h> @@ -48,47 +51,47 @@ * \return 0 on success. Negative on error. */ static int sdp_parse_attr_group(struct sdp *sdp, char *val) { - char *id = val; + char *id = val; - val = strsep(&id, " "); + 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; + 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; + /* not implemented */ + return 0; } static int sdp_parse_attr_rtcp(struct sdp *sdp, const char *val) { - /* not implemented */ - return 0; + /* 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; + 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; + 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; + if (0 == strcmp("trickle", val)) { + sdp->ice_options.trickle = true; + } + return 0; } /** @@ -102,59 +105,59 @@ static int sdp_parse_attr_ice_options(struct sdp *sdp, const char *val) { * \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; + 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; + /* not implemented */ + return 0; } static int sdp_parse_attr_mid(struct sdp *sdp, const char *val) { - /* not implemented */ - return 0; + /* not implemented */ + return 0; } static int sdp_parse_attr_extmap(struct sdp *sdp, const char *val) { - /* not implemented */ - return 0; + /* not implemented */ + return 0; } /** @@ -170,36 +173,36 @@ static int sdp_parse_attr_extmap(struct sdp *sdp, const char *val) { * \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; + 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; + /* not implemented */ + return 0; } static int sdp_parse_attr_fmtp(struct sdp *sdp, const char *val) { - /* not implemented */ - return 0; + /* not implemented */ + return 0; } /** @@ -211,54 +214,54 @@ static int sdp_parse_attr_fmtp(struct sdp *sdp, const char *val) { * \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; + 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; } /** @@ -277,58 +280,58 @@ static int sdp_parse_attribute(struct sdp *sdp, char *attr) { * \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; + 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; + return 0; } /** @@ -345,12 +348,12 @@ static int sdp_parse_connection_data(struct sdp *sdp, const char *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; + if (0 != strcmp("0", value)) { + return -URTC_ERR_SDP_MALFORMED_VERSION; + } + sdp->version = 0; - return 0; + return 0; } /** @@ -370,23 +373,23 @@ static int sdp_parse_version(struct sdp *sdp, const char *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; + 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; + return 0; } /** @@ -402,14 +405,14 @@ static int sdp_parse_session_name(struct sdp *sdp, const char *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; + 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; } /** @@ -421,279 +424,281 @@ static int sdp_parse_timing(struct sdp *sdp, const char *value) { * \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; - } + 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; + 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; + 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; } + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #ifndef _URTC_SDP_H @@ -33,91 +36,91 @@ extern "C" { // Maximum size of SDP string (in bytes) -#define SDP_MAX_SIZE 2048 +#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_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 +#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_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_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_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; + 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; + // 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; @@ -148,3 +151,5 @@ int sdp_serialize(char *dst, size_t len, const struct sdp *src); #endif #endif /* _URTC_SDP_H */ + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,131 +1,139 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ -#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 <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 "mdns.h" // mdns_subscribe, mdns_unsubscribe +#include "prng.h" // prng_init #include "sdp.h" #include "urtc.h" -#include "uuid.h" // uuid_create_str +#include "uuid.h" // uuid_create_str -#define RX_BUF_CAP 2048 // receive buffer capacity +#define RX_BUF_CAP 2048 // receive buffer capacity -#define POLL_TIMEOUT_MS 50 // poll() timeout (in milliseconds) +#define POLL_TIMEOUT_MS 50 // poll() timeout (in milliseconds) + +const static char *default_stun_servers[] = { + "stun.liburtc.org", + NULL +}; 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, + 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_NEW = 0, - STATE_ICE_NEW, - STATE_ICE_GATHERING, - STATE_ICE_COMPLETE, + STATE_ICE_NEW, + STATE_ICE_GATHERING, + STATE_ICE_COMPLETE, - STATE_CONNECTING, + STATE_CONNECTING, - STATE_CONNECTED, + STATE_CONNECTED, - STATE_DISCONNECTED, + STATE_DISCONNECTED, - STATE_FAILED, + STATE_FAILED, - STATE_CLOSED, + STATE_CLOSED, - NUM_STATES // must be last + NUM_STATES // must be last }; enum rtc_event { - EVENT_SOCKET = 0, - EVENT_TIMER, - EVENT_MDNS, - NUM_EVENTS, // must be last + EVENT_SOCKET = 0, + EVENT_TIMER, + EVENT_MDNS, + NUM_EVENTS, // must be last }; struct peerconn { - // socket file descriptor - int sockfd; + // socket file descriptor + int sockfd; - // execution thread - pthread_t thread; + // execution thread + pthread_t thread; - // poll file descriptors - struct pollfd fds[NUM_EVENTS]; + // poll file descriptors + struct pollfd fds[NUM_EVENTS]; - // callbacks - urtc_on_ice_candidate *on_ice_candidate; - urtc_force_idr *force_idr; + // callbacks + urtc_on_ice_candidate *on_ice_candidate; + urtc_force_idr *force_idr; - // stun servers - const char **stun; + // stun servers + const char **stun; - // state machine - enum signaling_state ss; + // state machine + enum signaling_state ss; - // local and remote descriptions - struct sdp ldesc, rdesc; + // 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; + // 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 } + { 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 } }; /** @@ -136,11 +144,11 @@ const enum rtc_state state_table[NUM_STATES][NUM_EVENTS] = { * \return 0 on success, negative on error. */ static int stun_handler( - struct peerconn *pc, - const uint8_t *pkt, - size_t n + struct peerconn *pc, + const uint8_t *pkt, + size_t n ) { - return 0; + return 0; } /** @@ -151,11 +159,11 @@ static int stun_handler( * \return 0 on success, negative on error. */ static int dtls_handler( - struct peerconn *pc, - const uint8_t *pkt, - size_t n + struct peerconn *pc, + const uint8_t *pkt, + size_t n ) { - return 0; + return 0; } /** @@ -166,11 +174,11 @@ static int dtls_handler( * \return 0 on success, negative on error. */ static int rtp_handler( - struct peerconn *pc, - const uint8_t *pkt, - size_t n + struct peerconn *pc, + const uint8_t *pkt, + size_t n ) { - return 0; + return 0; } /** @@ -184,39 +192,39 @@ static int rtp_handler( * \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; + 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; } /** @@ -232,7 +240,7 @@ static int socket_event_handler(struct peerconn *pc) { * \return 0 on success, negative on error. */ static int timer_event_handler(struct peerconn *pc) { - return 0; + return 0; } /** @@ -243,51 +251,51 @@ static int timer_event_handler(struct peerconn *pc) { * \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; + 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; + 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 } + { 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 } }; /** @@ -296,18 +304,18 @@ const event_handler action_table[NUM_STATES][NUM_EVENTS] = { // send stun request // wait for stun reply -// timeout -> resend request +// timeout -> resend request -// called dir caller -// ------ --- ------ -// setRemoteDescription(offer) <-- offer = createOffer() -// setLocalDescription(offer) -// answer = createAnswer() --> setRemoteDescription(answer) +// called dir caller +// ------ --- ------ +// setRemoteDescription(offer) <-- offer = createOffer() +// setLocalDescription(offer) +// answer = createAnswer() --> setRemoteDescription(answer) // setLocalDescription(answer) // -// cand = onIceCandidate --> addIceCandidate(cand) -// addIceCandidate(cand) <-- cand = onIceCandidate -// ... +// cand = onIceCandidate --> addIceCandidate(cand) +// addIceCandidate(cand) <-- cand = onIceCandidate +// ... // // (connection established) // @@ -324,118 +332,124 @@ const event_handler action_table[NUM_STATES][NUM_EVENTS] = { * \return Unused. */ static void * runloop(void *arg) { - struct peerconn *pc; - enum rtc_event event; - int n; + struct peerconn *pc; + enum rtc_event event; + int n; - pc = (struct peerconn *)arg; - assert(pc); + 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); + // 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; - } + // 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; + goto _loop; - return NULL; + 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; + // seed 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 + if (!stun) { + pc->stun = default_stun_servers; + } else { + 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); + mdns_unsubscribe(pc->mdns.sockfd); _fail_mdns_subscribe: - close(pc->sockfd); + close(pc->sockfd); _fail_socket: - free(pc); + free(pc); - return NULL; + 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; + if (!pc) return -1; + if (!cb) return -1; + pc->on_ice_candidate = cb; - return -URTC_ERR_NOT_IMPLEMENTED; + return -URTC_ERR_NOT_IMPLEMENTED; } int urtc_add_ice_candidate(struct peerconn *pc, const char *cand) { - return -URTC_ERR_NOT_IMPLEMENTED; + return -URTC_ERR_NOT_IMPLEMENTED; } int urtc_create_answer(struct peerconn *pc, char **answer) { - return -URTC_ERR_NOT_IMPLEMENTED; + return -URTC_ERR_NOT_IMPLEMENTED; } int urtc_create_offer(struct peerconn *pc, char **offer) { - return -URTC_ERR_NOT_IMPLEMENTED; + return -URTC_ERR_NOT_IMPLEMENTED; } int urtc_set_remote_description(struct peerconn *pc, const char *desc) { - return -URTC_ERR_NOT_IMPLEMENTED; + return -URTC_ERR_NOT_IMPLEMENTED; } int urtc_set_local_description(struct peerconn *pc, const char *desc) { - return -URTC_ERR_NOT_IMPLEMENTED; + 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); - } + 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); + } } + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -3,25 +3,29 @@ * * \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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ /** @@ -105,8 +109,8 @@ typedef void (urtc_force_idr)(); * 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. + * 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[]); @@ -221,3 +225,5 @@ void urtc_peerconn_destroy(urtc_peerconn_t *pc); #endif #endif /* _URTC_H */ + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ /** @@ -39,16 +42,16 @@ * \return Populated UUID. */ struct uuid uuid_create() { - struct uuid u; + struct uuid u; - // fill with randomness - prng(&u, sizeof(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; + // 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; + return u; } /** @@ -58,19 +61,21 @@ struct uuid uuid_create() { * */ void uuid_create_str(char s[UUID_STR_LEN]) { - struct uuid u = uuid_create(); + 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] - ); + 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] + ); } + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ @@ -1,24 +1,27 @@ /** - * 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. + * Copyright (c) 2019-2021 Chris Hiszpanski. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. */ #ifndef _URTC_UUID_H @@ -35,12 +38,12 @@ extern "C" { #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]; + 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(); @@ -52,3 +55,5 @@ void uuid_create_str(char uuid[UUID_STR_LEN]); #endif #endif // _URTC_UUID_H + +/* vim: set expandtab ts=8 sw=4 tw=0 : */ |