Function ruri_add_param

modules/sipmsgops/uri.c:184–285

* Adds a new parameter to Request URI */

 * Adds a new parameter to Request URI
 */
int ruri_add_param(struct sip_msg* _msg, str* _param)
{
	str param = *_param, *cur_uri, new_uri;
	struct sip_uri *parsed_uri;
	char *at;

	if (param.len == 0)
		return 1;

	if (parse_sip_msg_uri(_msg) < 0) {
	        LM_ERR("ruri parsing failed\n");
	        return -1;
	}

	parsed_uri = &(_msg->parsed_uri);

	/* if current ruri has no headers, pad param at the end */
	if (parsed_uri->headers.len == 0) {
		cur_uri =  GET_RURI(_msg);
		new_uri.len = cur_uri->len + param.len + 1;
		if (new_uri.len > MAX_URI_SIZE) {
			LM_ERR("new ruri too long\n");
			return -1;
		}
		new_uri.s = pkg_malloc(new_uri.len);
		if (new_uri.s == 0) {
			LM_ERR("Memory allocation failure\n");
			return -1;
		}
		memcpy(new_uri.s, cur_uri->s, cur_uri->len);
		*(new_uri.s + cur_uri->len) = ';';
		memcpy(new_uri.s + cur_uri->len + 1, param.s, param.len);
		if (set_ruri(_msg, &new_uri ) == 1) {
			goto ok;
		} else {
			goto nok;
		}
	}

	/* otherwise take the long path */
	new_uri.len = 4 +
		(parsed_uri->user.len ? parsed_uri->user.len + 1 : 0) +
		(parsed_uri->passwd.len ? parsed_uri->passwd.len + 1 : 0) +
		parsed_uri->host.len +
		(parsed_uri->port.len ? parsed_uri->port.len + 1 : 0) +
		parsed_uri->params.len + param.len + 1 +
		parsed_uri->headers.len + 1;
	if (new_uri.len > MAX_URI_SIZE) {
	        LM_ERR("new ruri too long\n");
		return -1;
	}

	new_uri.s = pkg_malloc(new_uri.len);
	if (new_uri.s == 0) {
		LM_ERR("no more pkg memory\n");
		return -1;
	}