Function parse_sdp

parser/sdp/sdp.c:686–730

* Parse all SDP parts from the SIP body. * * returns the first found SDP on success * returns NULL if no SDP found or if error */

 * returns NULL if no SDP found or if error
 */
sdp_info_t* parse_sdp(struct sip_msg* _m)
{
	struct body_part *part;
	sdp_info_t *sdp, *ret;

	if ( parse_sip_body(_m)<0 || _m->body==NULL) {
		LM_DBG("message body has length zero: %p\n", _m->body);
		return NULL;
	}

	ret = NULL;

	/* iterate all body parts and look for the SDP mime */
	for( part=&_m->body->first ; part ; part=part->next) {

		/* skip body parts which were deleted or newly added */
		if (!is_body_part_received(part))
			continue;

		if ( part->mime != ((TYPE_APPLICATION<<16)+SUBTYPE_SDP) )
			continue;

		if (part->parsed) {
			if (!ret)
				ret = part->parsed;
			continue;
		}

		if ( (sdp=new_sdp())==NULL ) {
			LM_ERR("Can't create new sdp, skipping\n");
		} else {
			if (parse_sdp_session(&part->body, 0, NULL, sdp)<0) {
				LM_ERR("failed to parse SDP for body part, skipping\n");
				free_sdp( sdp );
			} else {
				part->parsed = (void*)sdp;
				part->free_parsed_f = (free_parsed_part_function)free_sdp;
				/* remember the first found SDP */
				if (!ret) ret = sdp;
			}
		}
	}

	return ret;
}

void free_sdp_content(sdp_info_t* sdp)
{