Function get_next_su

resolve.c:2048–2097

int get_next_su(struct proxy_l *p, union sockaddr_union* su, int add_to_bl)
{
	struct hostent *he;
	struct bl_rule *list;
	struct net  ip_net;
	int n;

	if (failover_bl && add_to_bl) {
		memset( &ip_net, 0xff , sizeof(struct net));
		hostent2ip_addr( &ip_net.ip, &p->host, p->addr_idx);
		ip_net.mask.af = ip_net.ip.af;
		ip_net.mask.len = ip_net.ip.len;
		list = 0;
		n = add_rule_to_list( &list, &list, &ip_net, 0, p->port, p->proto, 0);
		if (n!=0) {
			LM_ERR("failed to build bl rule\n");
		} else {
			add_list_to_head( failover_bl, list, list, 0, DNS_BL_EXPIRE);
		}
	}

	/* any more available IPs in he ? */
	if ( p->host.h_addr_list[++p->addr_idx] ) {
		/* yes -> return the IP*/
		hostent2su( su, &p->host, p->addr_idx, (p->port)?p->port:SIP_PORT);
		return 0;
	}

	/* get a new he from DNS */
	he = get_next_he( &p->dn, &p->proto, &p->port);
	if (he==NULL)
		return -1;

	/* replace the current he */
	if (p->flags&PROXY_SHM_FLAG) {
		free_shm_hostent( &p->host );
		n = hostent_shm_cpy(&(p->host), he);
	} else {
		free_hostent( &p->host );
		n = hostent_cpy(&(p->host), he);
	}
	if (n!=0) {
		free_dns_res( p );
		return -1;
	}

	hostent2su( su, &p->host, 0, (p->port)?p->port:SIP_PORT);
	p->addr_idx = 0;
	return 0;
}