hello
First of all thanks to Mr. Timo, for his help regarding sendmsg().
As I wanted to see the data that i set in the tcl file, I edited the
../tcl/ex/udpdata.tcl like
$ns at 0.1 "$udp0 send 724 Hello1"
$ns at 0.2 "$udp1 send 100 Hello2"
$ns at 0.3 "$udp0 send 500 Hello3"
$ns at 0.4 "$udp1 send 828 Hello4"
It calls the following function in udp.cc, where i added the printf
statement
int UdpAgent::command(int argc, const char*const* argv)
{
if (argc == 4) {
if (strcmp(argv[1], "send") == 0) {
printf("\n \n%d==>%s",atoi(argv[2]),argv[3]);
PacketData* data = new PacketData(1 + strlen(argv[3]));
strcpy((char*)data->data(), argv[3]);
sendmsg(atoi(argv[2]), data);
return (TCL_OK);
}
Its displaying the contents of data, as expected. But after this, when i add
printf statement in "void UdpAgent::sendmsg(int nbytes, AppData* data, const
char* flags)" ,like given below
if (flags && (0 ==strcmp(flags, "NEW_BURST")))
rh->flags() |= RTP_M;
p->setdata(data);
printf("after setdata(): %s :",p->userdata());
target_->recv(p);
and at receiver end, i did the same, like
void UdpAgent::recv(Packet* pkt, Handler*)
{
// printf("\n userdata():%s", pkt->userdata());
printf("\nData:::%s",pkt->userdata());
printf("\n In UdpAgent::recv(Packet* pkt, Handler*)");
if (app_ ) {
Now in both cases, its displaying either null or some garbage value.
what is the problem here?
Any little help will be greatly appreciated.
thanks,
Anuradha
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