Typically, the SDP parser is used as follows:
sdp_parser_t *parser = sdp_parse(home, message, len, 0); if (!sdp_session(parser)) { show(sdp_parsing_error(parser)); } else { sdp_session_t *sdp = sdp_session(parser);
} sdp_parser_free(parser);
There are various flags indicating what kind of SDP variants the sdp_parse() accepts. The sanity check run after parsing can be disabled by including flag sdp_f_insane. The parser can be used to parse syntactically vague configuration files when using flag sdp_f_config. The parser will then accept * for media, protocol and port, for instance.
Typically, the SDP printer is used as follows:
char buffer[512]; sdp_printer_t *printer = sdp_print(home, session, buffer, sizeof(buffer), 0); if (sdp_message(printer)) { char const *msg = sdp_message(printer); size_t msgsize = sdp_message_size(printer);
At this point, application can use the SDP message contents, e.g., it can send them to network, and then free the message:
} else { show_critical_error(sdp_printing_error(printer)); } sdp_printer_free(printer);
size_t increment_sdp_version(char buf[], size_t bsize, char const *original, size_t osize) { su_home_t home[1] = { SU_HOME_INIT(home) }; sdp_parser_t *parser = sdp_parse(home, original, osize, 0); sdp_printer_t *printer; size_t retval = 0; if (sdp_session(parser)) { sdp_session_t *sdp = sdp_session(parser); sdp->sdp_origin->o_version++; printer = sdp_print(home, sdp, buf, bsize, 0); if (sdp_message(printer)) { retval = sdp_message_size(printer); } else { fprintf(stderr, "increment_sdp_version: %s\n", sdp_printing_error(printer)); } sdp_printer_free(printer); } else { fprintf(stderr, "increment_sdp_version: %s\n", sdp_parsing_error(p)); } sdp_parser_free(parser); su_home_deinit(home); return retval; }