Function ruri_del_param

modules/sipmsgops/uri.c:95–179

* Removes a given parameter from Request URI */

 * Removes a given parameter from Request URI
 */
int ruri_del_param(struct sip_msg* _msg, str* _param)
{
	str param = *_param;
	str params;

	char  *tok_end;
	struct sip_uri *parsed_uri;

	str    param_tok, key;
	str    new_uri, old_uri;

	int begin_len, end_len;

	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);

	params = parsed_uri->params;
	if (0 == params.s || 0 == params.len) {
		LM_DBG("RURI contains no params to delete! Returning...\n");
		return -1;
	}

	while (params.len) {
		tok_end = q_memchr(params.s, ';', params.len);

		param_tok.s = params.s;
		if (tok_end == NULL) {
			param_tok.len = params.len;
			params.len = 0;
		} else {
			param_tok.len = tok_end - params.s;
			params.len -= (param_tok.len + 1/*';' char*/);
			params.s   += (param_tok.len + 1);
		}

		tok_end = q_memchr(param_tok.s, '=', param_tok.len);
		if (tok_end == NULL) {
			key       = param_tok;
		} else {
			key.s     = param_tok.s;
			key.len   = tok_end - param_tok.s;
		}

		if (!str_strcmp(&param, &key)) {
			/* found the param to remove */
			/* include the leading ';' */
			param_tok.s--;
			param_tok.len++;
			old_uri = *GET_RURI(_msg);
			new_uri.len = old_uri.len - param_tok.len;
			new_uri.s = pkg_malloc(new_uri.len);