C6678 Ethernet helloWorld

Greg Reuter

Hello Forums,

I am working on a 6678 project based on the example C:\ti\mcsdk_2_01_02_06\examples\ndk\helloWorld using CCS V5.5.0.00077.

I can add a new UDP port with the C function DaemonNew(), and it receives the new UDP port number.
However, I've been told our product needs to generate an ICMP Destination Port Unreachable message for unbound
UDP port numbers.

Can the PA do that? How do I make it happen?

over 11 years ago

0 lding over 11 years ago

TI__Guru* 95265 points

In the NDK package, PA is not used for UDP port parsing. The UDP is handled by C:\ti\ndk_2_22_03_20\packages\ti\ndk\stack\udp\udp.c

Inside UdpInput(),

   /* If there's no PCB, send an ICMP error */
    if( !hSock )
    {
        if( !(pPkt->Flags & FLG_PKT_MACBCAST) && UDP_SEND_ICMP_PORTUNREACH)
            ICMPGenPacket( pIpHdr, pPkt->hIFRx, ICMP_UNREACH,
                           ICMP_UNREACH_PORT, 0 );
        udps.RcvNoPort++;
        PBM_free( pPkt );
        return;
    }

Can you try to generate ICMP Unreachable message around here?

Regards, Eric

0 Greg Reuter over 11 years ago in reply to lding

Intellectual 535 points

Sorry I'm slow at this. I'm trying to diagram how helloWorld.cfg eventually trickles down to call UdpInput().

0 Greg Reuter over 11 years ago in reply to Greg Reuter

Intellectual 535 points

I see how helloWorld.cfg trickles all the way down to call ICMPGenPacket().

How do I add a breakpoint to ICMPGenPacket()? Is there a SPRU that describes how I work about this? Maybe I need to recompile the NDK library for "debug", but haven't been able to figure out how yet.

0 lding over 11 years ago in reply to Greg Reuter

TI__Guru* 95265 points

You need to rebuild NDK in debug http://processors.wiki.ti.com/index.php/Rebuilding_the_NDK_Core

Regards, Eric

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C6678 Ethernet helloWorld