Re: UDP problem

Do you need:

#define  UDP_SOCKETS              4  

3 for your stuff and 1 for the other?

On 7/11/2014 1:50 PM, seecwriter-/[email protected] [rabbit-semi] wrote:
>
> I have an R6k application that uses UDP broadcast messaging. And it 
> seems to work fine. On our R3000 products we also use UDP, and we also 
> use Scott Henion's UDPDownload feature which also uses a UDP socket. I 
> am trying add Scott's method of device identification to my R6k 
> app. But I've been unable to get it to work.
>
>
> I'm using 3 UDP sockets, on port 2100,  for our system communication. 
> The ID socket is on port 2000.
>
> I have these defines.
>
>
> #define  UDP_BUF_SIZE             256
> #define  UDP_SOCKETS              3  
> #define  MAX_UDP_SOCKET_BUFFERS   8
>
> I open the ID socket the same way as the other sockets, it opens with 
> no errors:
>
>
> if( !udp_extopen( &udp_dl_sock, IF_DEFAULT, 2000, -1, -1, NULL, 0, 0) ) {
>
> printf("UDPDL-udp_open socket failed!\r\n");
>
> return1;
>
> }
>
> ....
>
> Then I check the socket for broadcast packets.
>
>
> len=udp_recvfrom( &udp_dl_sock, buff, sizeof(buff), &ip, &port);
>
> if( len< 0) return;
>
>
> I never get any packets.
>
>
> Using Wireshark I see the broadcast UDP datagram being sent by the 
> host. The datagram contains 8-bytes of data per Scott's format. All 
> other devices see the datagram and respond accordingly. But not the 
> R6k device.
>
>
> I then added #defines UDP_DEBUG and UDP_VERBOSE, and set debug_on to 
> 5, which generates lots of output. Running the same test, the UDP 
> library prints out that it got the broadcast packet, and that's it. I 
> never get it via udp_recvfrom().  Here is paste of the relevant 
> printout showing that the packet was received. You can see the 
> received packet near the middle at port 2000. Notice that it doesn't 
> say "no applicable socket". So it did associate the datagram with the 
> open socket.
>
>
> UDP: got pkt 0AFA056B:137 -> 0AFA05FF:137 payload=50 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA0568:137 -> 0AFA05FF:137 payload=50 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA0535:59454 -> FFFFFFFF:1947 payload=40 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA0553:137 -> 0AFA05FF:137 payload=50 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA053E:58143 -> FFFFFFFF:2000 payload=8 i/f=0
> UDP: got pkt 0AFA055E:137 -> 0AFA05FF:137 payload=50 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA056B:137 -> 0AFA05FF:137 payload=50 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA0568:137 -> 0AFA05FF:137 payload=50 i/f=0
> UDP: no applicable socket
> UDP: got pkt 0AFA0553:137 -> 0AFA05FF:137 payload=50 i/f=0
>
>
> I'm at a loss as to how to proceed. Any suggestions?
>
>
> Steve
>
>
>