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/*
* Copyright (C) 2004-2005 by the University of Southern California
* $Id: diffagent.cc,v 1.13 2005/09/13 20:47:34 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
// DiffAppAgent - Wrapper Class for diffusion transport agent DR, ported from SCADDS's directed diffusion software. --Padma, nov 2001.
#ifdef NS_DIFFUSION
#include "diffagent.h"
#include "diffrtg.h"
static class DiffAppAgentClass : public TclClass {
public:
DiffAppAgentClass() : TclClass("Agent/DiffusionApp") {}
TclObject* create(int , const char*const* ) {
return(new DiffAppAgent());
}
} class_diffusion_app_agent;
void NsLocal::sendPacket(DiffPacket p, int len, int dst) {
agent_->sendPacket(p, len, dst);
}
DiffPacket NsLocal::recvPacket(int fd) {
DiffPacket p;
fprintf(stderr, "This function should not get called; call DiffAppAgent::recv(Packet *, Handler *) instead\n\n");
exit(1);
return (p); // to keep the compiler happy
}
DiffAppAgent::DiffAppAgent() : Agent(PT_DIFF) {
dr_ = NR::create_ns_NR(DEFAULT_DIFFUSION_PORT, this);
}
int DiffAppAgent::command(int argc, const char*const* argv) {
//Tcl& tcl = Tcl::instance();
if (argc == 3) {
if (strcmp(argv[1], "node") == 0) {
MobileNode *node = (MobileNode *)TclObject::lookup(argv[2]);
((DiffusionRouting *)dr_)->getNode(node);
return TCL_OK;
}
if (strcmp(argv[1], "agent-id") == 0) {
int id = atoi(argv[2]);
((DiffusionRouting *)dr_)->getAgentId(id);
return TCL_OK;
}
}
return Agent::command(argc, argv);
}
void DiffAppAgent::recv(Packet* p, Handler* h)
{
Message *msg;
DiffusionData *diffdata;
diffdata = (DiffusionData *)(p->userdata());
msg = diffdata->data();
DiffusionRouting *dr = (DiffusionRouting*)dr_;
dr->recvMessage(msg);
Packet::free(p);
}
void
DiffAppAgent::initpkt(Packet* p, Message* msg, int len)
{
hdr_cmn* ch = HDR_CMN(p);
hdr_ip* iph = HDR_IP(p);
AppData *diffdata;
diffdata = new DiffusionData(msg, len);
p->setdata(diffdata);
// initialize pkt
ch->uid() = msg->pkt_num_; /* copy pkt_num from diffusion msg */
ch->ptype() = type_;
ch->size() = size_;
ch->timestamp() = Scheduler::instance().clock();
ch->iface() = UNKN_IFACE.value(); // from packet.h (agent is local)
ch->direction() = hdr_cmn::NONE;
ch->error() = 0; /* pkt not corrupt to start with */
iph->saddr() = addr();
iph->sport() = ((DiffusionRouting*)dr_)->getAgentId();
iph->daddr() = addr();
iph->flowid() = fid_;
iph->prio() = prio_;
iph->ttl() = defttl_;
hdr_flags* hf = hdr_flags::access(p);
hf->ecn_capable_ = 0;
hf->ecn_ = 0;
hf->eln_ = 0;
hf->ecn_to_echo_ = 0;
hf->fs_ = 0;
hf->no_ts_ = 0;
hf->pri_ = 0;
hf->cong_action_ = 0;
}
Packet*
DiffAppAgent::createNsPkt(Message *msg, int len)
{
Packet *p;
p = Packet::alloc();
initpkt(p, msg, len);
return (p);
}
void DiffAppAgent::sendPacket(DiffPacket dp, int len, int dst) {
Packet *p;
hdr_ip *iph;
Message *msg;
msg = (Message *)dp;
p = createNsPkt(msg, len);
iph = HDR_IP(p);
iph->dport() = dst;
// schedule for realistic delay : set to 0 sec for now
(void)Scheduler::instance().schedule(target_, p, 0.000001);
}
#endif // NS
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