Function rtpe_function_call_prepare

modules/rtpengine/rtpengine.c:2684–2870

static void pkg_free_wrapper(void *p) { pkg_free(p); }

static int rtpe_function_call_prepare(bencode_buffer_t *bencbuf, struct sip_msg *msg, enum rtpe_operation op,
         struct ng_flags_parse *ng_flags, str *flags_str, str *body_in, bencode_item_t *extra_dict, char **err)
{
	bencode_item_t *item;
	str viabranch;
	int ret, flags_exist = 0, callid_exist = 0, from_tag_exist = 0, to_tag_exist = 0;
	str flags_nt = {0,0};

	if (bencode_buffer_init(bencbuf)) {
		LM_ERR("could not initialize bencode_buffer_t\n");
		return -1;
	}

	if (!extra_dict) {
		ng_flags->dict = bencode_dictionary(bencbuf);
	} else {
		ng_flags->dict = extra_dict;

		ng_flags->flags = bencode_dictionary_get(ng_flags->dict, "flags");
		if (ng_flags->flags)
			flags_exist = 1;
		bencode_dictionary_get_str(ng_flags->dict, "call-id", &ng_flags->call_id);
		bencode_dictionary_get_str(ng_flags->dict, "from-tag", &ng_flags->from_tag);
		bencode_dictionary_get_str(ng_flags->dict, "to-tag", &ng_flags->to_tag);
		if (ng_flags->call_id.len)
			callid_exist = 1;
		if (ng_flags->from_tag.len)
			from_tag_exist = 1;
		if (ng_flags->to_tag.len)
			to_tag_exist = 1;
	}
	if (!flags_exist)
		ng_flags->flags = bencode_list(bencbuf);
	if (op == OP_OFFER || op == OP_ANSWER) {
		ng_flags->direction = bencode_list(bencbuf);
		ng_flags->replace = bencode_list(bencbuf);
		ng_flags->rtcp_mux = bencode_list(bencbuf);

		bencode_dictionary_add_str(ng_flags->dict, "sdp", body_in);
	} else if (op == OP_SUBSCRIBE_ANSWER) {
		bencode_dictionary_add_str(ng_flags->dict, "sdp", body_in);
	}

	/*** parse flags & build dictionary ***/

	ng_flags->to = (op == OP_DELETE) ? 0 : 1;

	if (flags_str && pkg_nt_str_dup(&flags_nt, flags_str) < 0) {
		*err = "No more pkg mem";
		goto error;
	}

	if (parse_flags(ng_flags, msg, &op, flags_nt.s)) {
		*err = "could not parse flags";
		goto error;
	}

	if (!ng_flags->call_id.len &&