Function isn_query

modules/enum/enum.c:692–741

* See documentation in README file. */

 * See documentation in README file.
 */
int isn_query(struct sip_msg* _msg, str* suffix, str* service)
{
	char *user_s = NULL;
	int user_len, i, j;
	char name[MAX_DOMAIN_SIZE] = {0};
	char string[17] = {0};
	char szItad[17] = {0};
	size_t nItlen = 0;

	if (parse_sip_msg_uri(_msg) < 0) {
		LM_ERR("Parsing of R-URI failed\n");
		return -1;
	}

	user_s = _msg->parsed_uri.user.s;
	user_len = _msg->parsed_uri.user.len;

	memcpy(&(string[0]), user_s, user_len);
	string[user_len] = (char)0;

	/* Do primitive test for correct ISN format, */
	/* and set szItad to the ISN ITAD (RFC 3872/2871). */
	/* Correct ISN format guessed from freenum.org and IANA */
	/* doc http://www.iana.org/assignments/trip-parameters/ */
	{
		char *pAster = strchr(string, '*');
		if (pAster && (nItlen = strspn(pAster + sizeof(char), "0123456789")))
			strncpy(szItad, pAster + sizeof(char), nItlen);
		else {
			LM_ERR("R-URI user does not contain a valid ISN\n");
			return -1;
		}
	}

	/* Ammend the original ENUM E.164 string logic to process */
	/* ISN numbers instead, which include a nonreversed ITAD. */
	i = user_len - nItlen - sizeof(char); /* Ex: *1212 */
	j = 0;
	while (i--) {
		name[j] = user_s[i];
		name[j + 1] = '.';
		j = j + 2;
	}

	strcat(name + j, szItad);  /* Copy the unreversed ITAD, */
	name[j + nItlen] = '.';    /* and append a trailing dot. */
	memcpy(name + j + nItlen + sizeof(char), suffix->s, suffix->len + 1);

	return do_query(_msg, string, name, service);
}


/*********** INFRASTRUCTURE ENUM ***************/