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void UdpSend( char *buf, int len, IPADDR &ip, WORD port )
{
  bool isip6 = !ip.IsEmbeddedIPV4();

  iprintf("IsIPv6: %d\r\n", isip6);

  UDPPacket pkt(isip6);
  pkt.SetDestinationPort(port);
  pkt.SetSourcePort(port);
  pkt.AddData((BYTE *)buf, (WORD) len);  
  pkt.Send(ip);
}

void UserMain( void * pd )
{
    initWithWeb();
    char buf[] = { "Hello World" };

    IPADDR6 ip6adr;
    ip6adr.SetFromAscii( "255.255.255.255" );
    //ip6adr.SetFromAscii( "10.250.5.59" );		// My PC's IPv4 address

    //IPADDR6 ip6adr = IPADDR6::AsciiToIp6( "fe80::b4f3:189:71e9:3b56", false );	// My PC's IPv6 address.
   
    siprintf(DHCPNameBuffer,
            "%s_%s_%02X%02X%02X",
            "NB",
            PlatformName,
            gConfigRec.mac_address[3],
            gConfigRec.mac_address[4],
            gConfigRec.mac_address[5]
            );
    iprintf("OfferName: %s\n", DHCPNameBuffer);
    pDHCPOfferName = DHCPNameBuffer;

    // set our callbacks
    NB::V6::DHCPv6::pAddOROCB = AddORO;
    NB::V6::DHCPv6::pRequestOptionCB = AddSendOption;
    NB::V6::DHCPv6::pReplyCB = GetReply;

    EnableSmartTraps();

    iprintf("Application: %s\r\nNNDK Revision: %s\r\n",AppName,GetReleaseTag());
    while(1) {
        showIpAddresses();
        iprintf("\r\nType any key to display address information\r\n");
        iprintf("Note that routable addresses may take a few seconds to receive\r\n");
        getchar();
        iprintf("\r\n\r\n");
        puts("Sending...");
        UdpSend(buf, (int) strlen(buf), ip6adr, 2100);
        puts("Done.");
    }
}