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-rw-r--r--src/urtc.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/src/urtc.c b/src/urtc.c
index 47c32b8..7cbf790 100644
--- a/src/urtc.c
+++ b/src/urtc.c
@@ -37,6 +37,7 @@
#include <arpa/inet.h> // inet_ntoa
#include <netinet/in.h> // IPPROTO_UDP
#include <sys/socket.h> // socket
+#include <sys/time.h> // gettimeofday
#include <sys/types.h>
#include "b64.h" // b64_encode
@@ -427,15 +428,29 @@ int urtc_add_ice_candidate(struct peerconn *pc, const char *cand) {
}
int urtc_create_answer(struct peerconn *pc, char *answer, size_t size) {
- char pwd[18]; // 24 base64 characters
- char ufrag[3]; // 4 base64 characters
+ // write unique session id
+ {
+ struct timeval now;
+ if (-1 == gettimeofday(&now, NULL)) {
+ return -1;
+ }
+ snprintf(pc->ldesc.session_id, sizeof(pc->ldesc.session_id),
+ "%lu", now.tv_sec);
+ }
- prng(pwd, sizeof(pwd));
- prng(ufrag, sizeof(ufrag));
+ strcpy(pc->ldesc.mid[0], "video");
- b64_encode(pc->ldesc.pwd, pwd, sizeof(pwd));
- b64_encode(pc->ldesc.ufrag, ufrag, sizeof(ufrag));
+ // write ice-pwd and ice-ufrag
+ {
+ char pwd[18]; // 24 base64 characters
+ char ufrag[3]; // 4 base64 characters
+ prng(pwd, sizeof(pwd));
+ prng(ufrag, sizeof(ufrag));
+ b64_encode(pc->ldesc.pwd, pwd, sizeof(pwd));
+ b64_encode(pc->ldesc.ufrag, ufrag, sizeof(ufrag));
+ }
+ pc->ldesc.ice_options.trickle = true;
pc->ldesc.mode = SDP_MODE_SEND_ONLY;
return sdp_serialize(answer, size, &pc->ldesc);