[lwip-users] Lwip 1.1.0 upd_send

[Paul C]

Hi List,

I use 
            err = udp_connect( Shout, IP_ADDR_ANY, A_PORT);
            err = udp_send(Shout, pcb);

With LWIP 1.1.0 release the udp is sent to 0.0.0.0 I have this patch 
in udp.c to make it use the network address (which is what I want).
Am I using udp_connect/ udp_send wrongly or is this a patch
that should be in lwip? Should I really use IP_ADDR_BROADCAST here 
instead?

Thanks 

Paul Clarke


@@ -448,16 +448,22 @@ udp_send(struct udp_pcb *pcb, struct pbu
   /* PCB local address is IP_ANY_ADDR? */
   if (ip_addr_isany(&pcb->local_ip)) {
     /* use outgoing network interface IP address as source address */
     src_ip = &(netif->ip_addr);
   } else {
     /* use UDP PCB local IP address as source address */
     src_ip = &(pcb->local_ip);
   }
+  /* PCB remote address is IP_ANY_ADDR? */
+  if (ip_addr_isany(&pcb->remote_ip)) {
+    /* use outgoing network interface network address as destination
address */

+    pcb->remote_ip.addr = netif->ip_addr.addr & netif->netmask.addr
+        | (0xFFFFFFFFUL & (unsigned long)~netif->netmask.addr);
+  }

   LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %u\n",
   q->tot_l
en));

   /* UDP Lite protocol? */
   if (pcb->flags & UDP_FLAGS_UDPLITE) {
     LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %u\n",
     q->tot_len
));
     /* set UDP message length in UDP header */
     udphdr->len = htons(pcb->chksum_len);