Function is_from_user_enum

modules/enum/enum.c:230–384

* Check if from user is a valid enum based user, and check to make sure * that the src_ip == an srv record that maps to the enum from user. */

 * that the src_ip == an srv record that maps to the enum from user.
 */
int is_from_user_enum(struct sip_msg* _msg, str* suffix, str* service)
{
	struct ip_addr addr;
	struct hostent* he;
	unsigned short zp;
	unsigned short proto;
	char *user_s;
	int user_len, i, j;
	char name[MAX_DOMAIN_SIZE];
	char uri[MAX_URI_SIZE];
	struct sip_uri *furi;
	struct sip_uri luri;
	struct rdata* head;

	struct rdata* l;
	struct naptr_rdata* naptr;

	str pattern, replacement, result;
	char string[17];

	if (parse_from_header(_msg) < 0) {
	    LM_ERR("Failed to parse From header\n");
	    return -1;
	}

	if(_msg->from==NULL || get_from(_msg)==NULL) {
	    LM_DBG("No From header\n");
	    return -1;
	}

	if ((furi = parse_from_uri(_msg)) == NULL) {
	    LM_ERR("Failed to parse From URI\n");
	    return -1;
	}

	if (is_e164(&(furi->user)) == -1) {
	    LM_ERR("From URI user is not an E164 number\n");
	    return -1;
	}

	/* assert: the from user is a valid formatted e164 string */

	user_s = furi->user.s;
	user_len = furi->user.len;

	j = 0;
	for (i = user_len - 1; i > 0; i--) {
		name[j] = user_s[i];
		name[j + 1] = '.';
		j = j + 2;
	}

	memcpy(name + j, suffix->s, suffix->len + 1);

	head = get_record(name, T_NAPTR);

	if (head == 0) {
		LM_DBG("No NAPTR record found for %s.\n", name);