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 -- View this message in context: http://www.nabble.com/regarding-sendmsg%28%29-tf3678871.html#a10280688 Sent from the ns-users mailing list archive at Nabble.com.