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#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvsroot/nsnam/ns-2/common/messpass.cc,v 1.4 2010/03/08 05:54:49 tom_henderson Exp $";
#endif
#include "messpass.h"
#include "rtp.h"
#include "random.h"
#include "address.h"
#include "ip.h"
static class MessagePassingAgentClass : public TclClass {
public:
MessagePassingAgentClass() : TclClass("Agent/MessagePassing") {}
TclObject* create(int, const char*const*) {
return (new MessagePassingAgent());
}
} class_message_passing_agent;
MessagePassingAgent::MessagePassingAgent() : Agent(PT_MESSAGE), seqno_(-1)
{
bind("packetSize_", &size_);
}
MessagePassingAgent::MessagePassingAgent(packet_t type) : Agent(type)
{
bind("packetSize_", &size_);
}
void MessagePassingAgent::sendmsg(int nbytes, AppData* data, const char*)
{
Packet *p;
if (nbytes == -1) {
printf("Error: sendmsg() for MessagePassingAgent should not be -1\n");
return;
}
// check packet size (we don't fragment packets)
if (nbytes > size_) {
printf("Error: packet greater than maximum MessagePassingAgent packet size\n");
return;
}
double local_time = Scheduler::instance().clock();
p = allocpkt();
hdr_cmn::access(p)->size() = nbytes;
hdr_rtp* rh = hdr_rtp::access(p);
rh->flags() = 0;
rh->seqno() = ++seqno_;
hdr_cmn::access(p)->timestamp() =
(u_int32_t)(SAMPLERATE*local_time);
p->setdata(data);
target_->recv(p);
idle();
}
void MessagePassingAgent::sendto(int nbytes, AppData *data, const char*, ns_addr_t dst)
{
Packet *p;
if (nbytes == -1) {
printf("Error: packet size for MessagePassingAgent should not be -1\n");
return;
}
// check packet size (we don't fragment packets)
if (nbytes > size_) {
printf("Error: packet greater than maximum MessagePassingAgent packet size\n");
return;
}
double local_time = Scheduler::instance().clock();
p = allocpkt();
hdr_ip* iph = hdr_ip::access(p);
iph->daddr() = dst.addr_;
iph->dport() = dst.port_;
hdr_cmn::access(p)->size() = nbytes;
hdr_rtp* rh = hdr_rtp::access(p);
rh->flags() = 0;
rh->seqno() = ++seqno_;
hdr_cmn::access(p)->timestamp() =
(u_int32_t)(SAMPLERATE*local_time);
p->setdata(data);
target_->recv(p);
idle();
}
void MessagePassingAgent::recv(Packet* pkt, Handler*)
{
if (app_ ) {
// If an application is attached, pass the data to the app
hdr_cmn* h = hdr_cmn::access(pkt);
app_->process_data(h->size(), pkt->userdata());
} else if (pkt->userdata() && pkt->userdata()->type() == PACKET_DATA) {
// otherwise if it's just PacketData, pass it to Tcl
PacketData* data = (PacketData*)pkt->userdata();
hdr_ip* iph = hdr_ip::access(pkt);
Tcl& tcl = Tcl::instance();
tcl.evalf("%s recv %d %d %d {%s}", name(),
iph->saddr(), iph->sport(),
hdr_cmn::access(pkt)->size(), data->data());
} else {
// It wasn't PacketData, or userdata() was NULL
// so pass an empty string to Tcl
hdr_ip* iph = hdr_ip::access(pkt);
Tcl& tcl = Tcl::instance();
tcl.evalf("%s recv %d %d %d {}", name(),
iph->saddr(), iph->sport(),
hdr_cmn::access(pkt)->size());
}
Packet::free(pkt);
}
int MessagePassingAgent::command(int argc, const char*const* argv)
{
PacketData* data;
ns_addr_t dst;
if (argc == 4) {
if (strcmp(argv[1], "send") == 0) {
data = new PacketData(1 + strlen(argv[3]));
strcpy((char*)data->data(), argv[3]);
sendmsg(atoi(argv[2]), data);
return TCL_OK;
}
} else if (argc == 5) {
if (strcmp(argv[1], "sendmsg") == 0) {
data = new PacketData(1 + strlen(argv[3]));
strcpy((char*)data->data(), argv[3]);
sendmsg(atoi(argv[2]), data, argv[4]);
return TCL_OK;
} else if (strcmp(argv[1], "sendto") == 0) {
dst.addr_ = atoi(argv[3]);
dst.port_ = atoi(argv[4]);
if (dst.port_ == 0) dst.port_ = here_.port_;
sendto(atoi(argv[2]), 0, dst);
return TCL_OK;
}
} else if (argc == 6) {
if (strcmp(argv[1], "sendto") == 0) {
data = new PacketData(1 + strlen(argv[3]));
strcpy((char*)data->data(), argv[3]);
dst.addr_ = atoi(argv[4]);
dst.port_ = atoi(argv[5]);
if (dst.port_ == 0) dst.port_ = here_.port_;
sendto(atoi(argv[2]), data, 0, dst);
return TCL_OK;
} else if (strcmp(argv[1], "sendmsgto") == 0) {
dst.addr_ = atoi(argv[3]);
dst.port_ = atoi(argv[4]);
if (dst.port_ == 0) dst.port_ = here_.port_;
sendto(atoi(argv[2]), argv[5], dst);
return TCL_OK;
}
} else if (argc == 7) {
if (strcmp(argv[1], "sendmsgto") == 0) {
data = new PacketData(1 + strlen(argv[3]));
strcpy((char*)data->data(), argv[3]);
dst.addr_ = atoi(argv[4]);
dst.port_ = atoi(argv[5]);
if (dst.port_ == 0) dst.port_ = here_.port_;
sendto(atoi(argv[2]), argv[6], dst);
return TCL_OK;
}}
return (Agent::command(argc, argv));
}
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