char *janus_sdp_anonymize(const char *sdp) { if(sdp == NULL) return NULL; sdp_session_t *anon = NULL; sdp_parser_t *parser = sdp_parse(home, sdp, strlen(sdp), 0); if(!(anon = sdp_session(parser))) { JANUS_LOG(LOG_ERR, "Error parsing/merging SDP: %s\n", sdp_parsing_error(parser)); sdp_parser_free(parser); return NULL; } /* c= */ if(anon->sdp_connection && anon->sdp_connection->c_address) { anon->sdp_connection->c_address = "1.1.1.1"; } /* a= */ if(anon->sdp_attributes) { /* These are attributes we handle ourselves, the plugins don't need them */ while(sdp_attribute_find(anon->sdp_attributes, "ice-ufrag")) sdp_attribute_remove(&anon->sdp_attributes, "ice-ufrag"); while(sdp_attribute_find(anon->sdp_attributes, "ice-pwd")) sdp_attribute_remove(&anon->sdp_attributes, "ice-pwd"); while(sdp_attribute_find(anon->sdp_attributes, "ice-options")) sdp_attribute_remove(&anon->sdp_attributes, "ice-options"); while(sdp_attribute_find(anon->sdp_attributes, "fingerprint")) sdp_attribute_remove(&anon->sdp_attributes, "fingerprint"); while(sdp_attribute_find(anon->sdp_attributes, "group")) sdp_attribute_remove(&anon->sdp_attributes, "group"); while(sdp_attribute_find(anon->sdp_attributes, "msid-semantic")) sdp_attribute_remove(&anon->sdp_attributes, "msid-semantic"); } /* m= */ if(anon->sdp_media) { int audio = 0, video = 0; #ifdef HAVE_SCTP int data = 0; #endif sdp_media_t *m = anon->sdp_media; while(m) { if(m->m_type == sdp_media_audio && m->m_port > 0) { audio++; m->m_port = audio == 1 ? 1 : 0; } else if(m->m_type == sdp_media_video && m->m_port > 0) { video++; m->m_port = video == 1 ? 1 : 0; #ifdef HAVE_SCTP } else if(m->m_type == sdp_media_application) { if(m->m_proto_name != NULL && !strcasecmp(m->m_proto_name, "DTLS/SCTP") && m->m_port != 0) { data++; m->m_port = data == 1 ? 1 : 0; } else { m->m_port = 0; } #endif } else { m->m_port = 0; } /* c= */ if(m->m_connections) { sdp_connection_t *c = m->m_connections; while(c) { if(c->c_address) { c->c_address = "1.1.1.1"; } c = c->c_next; } } /* a= */ if(m->m_attributes) { /* These are attributes we handle ourselves, the plugins don't need them */ while(sdp_attribute_find(m->m_attributes, "ice-ufrag")) sdp_attribute_remove(&m->m_attributes, "ice-ufrag"); while(sdp_attribute_find(m->m_attributes, "ice-pwd")) sdp_attribute_remove(&m->m_attributes, "ice-pwd"); while(sdp_attribute_find(m->m_attributes, "ice-options")) sdp_attribute_remove(&m->m_attributes, "ice-options"); while(sdp_attribute_find(m->m_attributes, "crypto")) sdp_attribute_remove(&m->m_attributes, "crypto"); while(sdp_attribute_find(m->m_attributes, "fingerprint")) sdp_attribute_remove(&m->m_attributes, "fingerprint"); while(sdp_attribute_find(m->m_attributes, "setup")) sdp_attribute_remove(&m->m_attributes, "setup"); while(sdp_attribute_find(m->m_attributes, "connection")) sdp_attribute_remove(&m->m_attributes, "connection"); while(sdp_attribute_find(m->m_attributes, "group")) sdp_attribute_remove(&m->m_attributes, "group"); while(sdp_attribute_find(m->m_attributes, "mid")) sdp_attribute_remove(&m->m_attributes, "mid"); while(sdp_attribute_find(m->m_attributes, "msid")) sdp_attribute_remove(&m->m_attributes, "msid"); while(sdp_attribute_find(m->m_attributes, "msid-semantic")) sdp_attribute_remove(&m->m_attributes, "msid-semantic"); while(sdp_attribute_find(m->m_attributes, "rtcp")) sdp_attribute_remove(&m->m_attributes, "rtcp"); while(sdp_attribute_find(m->m_attributes, "rtcp-mux")) sdp_attribute_remove(&m->m_attributes, "rtcp-mux"); while(sdp_attribute_find(m->m_attributes, "candidate")) sdp_attribute_remove(&m->m_attributes, "candidate"); while(sdp_attribute_find(m->m_attributes, "ssrc")) sdp_attribute_remove(&m->m_attributes, "ssrc"); while(sdp_attribute_find(m->m_attributes, "ssrc-group")) sdp_attribute_remove(&m->m_attributes, "ssrc-group"); while(sdp_attribute_find(m->m_attributes, "extmap")) /* TODO Actually implement RTP extensions */ sdp_attribute_remove(&m->m_attributes, "extmap"); while(sdp_attribute_find(m->m_attributes, "sctpmap")) sdp_attribute_remove(&m->m_attributes, "sctpmap"); } if(m->m_type != sdp_media_application && m->m_mode == sdp_sendrecv) { /* FIXME sendrecv hack: sofia-sdp doesn't print sendrecv, but we want it to */ sdp_attribute_t *fakedir = calloc(1, sizeof(sdp_attribute_t)); fakedir->a_size = sizeof(sdp_attribute_t); fakedir->a_name = g_strdup("jfmod"); fakedir->a_value = g_strdup("sr"); sdp_attribute_append(&m->m_attributes, fakedir); } m = m->m_next; } } char buf[BUFSIZE]; sdp_printer_t *printer = sdp_print(home, anon, buf, BUFSIZE, 0); if(sdp_message(printer)) { int retval = sdp_message_size(printer); sdp_printer_free(printer); sdp_parser_free(parser); /* FIXME Take care of the sendrecv hack, if needed */ char *replace = strstr(buf, "a=jfmod:sr"); while(replace != NULL) { memcpy(replace, "a=sendrecv", strlen("a=sendrecv")); replace++; replace = strstr(replace, "a=jfmod:sr"); } JANUS_LOG(LOG_VERB, " -------------------------------------------\n"); JANUS_LOG(LOG_VERB, " >> Anonymized (%zu --> %d bytes)\n", strlen(sdp), retval); JANUS_LOG(LOG_VERB, " -------------------------------------------\n"); JANUS_LOG(LOG_VERB, "%s\n", buf); return g_strdup(buf); } else { JANUS_LOG(LOG_ERR, "Error anonymizing SDP: %s\n", sdp_printing_error(printer)); sdp_printer_free(printer); sdp_parser_free(parser); return NULL; } }
char *janus_sdp_anonymize(const char *sdp) { if(sdp == NULL) return NULL; //~ su_home_t home[1] = { SU_HOME_INIT(home) }; sdp_session_t *anon = NULL; sdp_parser_t *parser = sdp_parse(home, sdp, strlen(sdp), 0); if(!(anon = sdp_session(parser))) { JANUS_DEBUG("Error parsing/merging SDP: %s\n", sdp_parsing_error(parser)); return NULL; } //~ /* o= */ //~ if(anon->sdp_origin && anon->sdp_origin->o_username) { //~ free(anon->sdp_origin->o_username); //~ anon->sdp_origin->o_username = strdup("JANUS"); //~ } /* c= */ if(anon->sdp_connection && anon->sdp_connection->c_address) { //~ free(anon->sdp_connection->c_address); anon->sdp_connection->c_address = strdup("1.1.1.1"); } /* a= */ if(anon->sdp_attributes) { /* FIXME These are attributes we handle ourselves, the plugins don't need them */ while(sdp_attribute_find(anon->sdp_attributes, "ice-ufrag")) sdp_attribute_remove(&anon->sdp_attributes, "ice-ufrag"); while(sdp_attribute_find(anon->sdp_attributes, "ice-pwd")) sdp_attribute_remove(&anon->sdp_attributes, "ice-pwd"); while(sdp_attribute_find(anon->sdp_attributes, "ice-options")) sdp_attribute_remove(&anon->sdp_attributes, "ice-options"); while(sdp_attribute_find(anon->sdp_attributes, "fingerprint")) sdp_attribute_remove(&anon->sdp_attributes, "fingerprint"); while(sdp_attribute_find(anon->sdp_attributes, "group")) sdp_attribute_remove(&anon->sdp_attributes, "group"); while(sdp_attribute_find(anon->sdp_attributes, "msid-semantic")) sdp_attribute_remove(&anon->sdp_attributes, "msid-semantic"); } /* m= */ int a_sendrecv = 0, v_sendrecv = 0; if(anon->sdp_media) { int audio = 0, video = 0; sdp_media_t *m = anon->sdp_media; while(m) { if(m->m_type == sdp_media_audio) { audio++; m->m_port = audio == 1 ? 1 : 0; } else if(m->m_type == sdp_media_video) { video++; m->m_port = audio == 1 ? 1 : 0; } else { m->m_port = 0; } /* c= */ if(m->m_connections) { sdp_connection_t *c = m->m_connections; while(c) { if(c->c_address) { //~ free(c->c_address); c->c_address = strdup("1.1.1.1"); } c = c->c_next; } } /* a= */ if(m->m_attributes) { /* FIXME These are attributes we handle ourselves, the plugins don't need them */ while(sdp_attribute_find(m->m_attributes, "ice-ufrag")) sdp_attribute_remove(&m->m_attributes, "ice-ufrag"); while(sdp_attribute_find(m->m_attributes, "ice-pwd")) sdp_attribute_remove(&m->m_attributes, "ice-pwd"); while(sdp_attribute_find(m->m_attributes, "ice-options")) sdp_attribute_remove(&m->m_attributes, "ice-options"); while(sdp_attribute_find(m->m_attributes, "crypto")) sdp_attribute_remove(&m->m_attributes, "crypto"); while(sdp_attribute_find(m->m_attributes, "fingerprint")) sdp_attribute_remove(&m->m_attributes, "fingerprint"); while(sdp_attribute_find(m->m_attributes, "setup")) sdp_attribute_remove(&m->m_attributes, "setup"); while(sdp_attribute_find(m->m_attributes, "connection")) sdp_attribute_remove(&m->m_attributes, "connection"); while(sdp_attribute_find(m->m_attributes, "group")) sdp_attribute_remove(&m->m_attributes, "group"); while(sdp_attribute_find(m->m_attributes, "msid-semantic")) sdp_attribute_remove(&m->m_attributes, "msid-semantic"); while(sdp_attribute_find(m->m_attributes, "rtcp")) sdp_attribute_remove(&m->m_attributes, "rtcp"); while(sdp_attribute_find(m->m_attributes, "rtcp-mux")) sdp_attribute_remove(&m->m_attributes, "rtcp-mux"); while(sdp_attribute_find(m->m_attributes, "candidate")) sdp_attribute_remove(&m->m_attributes, "candidate"); while(sdp_attribute_find(m->m_attributes, "ssrc")) sdp_attribute_remove(&m->m_attributes, "ssrc"); while(sdp_attribute_find(m->m_attributes, "extmap")) /* TODO Actually implement RTP extensions */ sdp_attribute_remove(&m->m_attributes, "extmap"); } /* FIXME sendrecv hack: sofia-sdp doesn't print sendrecv, but we want it to */ if(m->m_mode == sdp_sendrecv) { m->m_mode = sdp_inactive; if(m->m_type == sdp_media_audio) a_sendrecv = 1; else if(m->m_type == sdp_media_video) v_sendrecv = 1; } m = m->m_next; } } char buf[BUFSIZE]; sdp_printer_t *printer = sdp_print(home, anon, buf, BUFSIZE, 0); if(sdp_message(printer)) { int retval = sdp_message_size(printer); sdp_printer_free(printer); /* FIXME Take care of the sendrecv hack */ if(a_sendrecv || v_sendrecv) { char *replace = strstr(buf, "a=inactive"); while(replace != NULL) { memcpy(replace, "a=sendrecv", strlen("a=sendrecv")); replace++; replace = strstr(replace, "a=inactive"); } } JANUS_PRINT(" -------------------------------------------\n"); JANUS_PRINT(" >> Anonymized (%zu --> %d bytes)\n", strlen(sdp), retval); JANUS_PRINT(" -------------------------------------------\n"); JANUS_PRINT("%s\n", buf); return g_strdup(buf); } else { JANUS_DEBUG("Error anonymizing SDP: %s\n", sdp_printing_error(printer)); return NULL; } }