uwjammer.cpp

Go to the documentation of this file.

//
// Copyright (c) 2024 Regents of the SIGNET lab, University of Padova.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. Neither the name of the University of Padova (SIGNET lab) nor the
//    names of its contributors may be used to endorse or promote products
//    derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
 
#include "uwjammer.h"
#include "mac.h"
#include "uwjammer_cmn_hdr.h"
#include <iostream>
 
const std::map<Uwjammer::JammerStatus, std::string> Uwjammer::status_info{
        {JammerStatus::IDLE, "Idle State"},
        {JammerStatus::BUSY, "PHY is transmitting"}};
 
static class UwjammerModule_Class : public TclClass
{
public:
    UwjammerModule_Class()
        : TclClass("Module/UW/JAMMER")
    {
    }
 
    TclObject *
    create(int, const char *const *)
    {
        return (new Uwjammer());
    }
} class_module_uwjammer;
 
Uwjammer::Uwjammer()
    : buffer_data_pkts(0)
    , n_jam_sent(0)
    , n_jam_discarded(0)
    , n_data_discarded(0)
    , curr_data_pkt(0)
    , Q_data()
{
    bind("buffer_data_pkts_", (int *) &buffer_data_pkts);
 
    if (buffer_data_pkts > MAX_BUFFER_SIZE)
        buffer_data_pkts = MAX_BUFFER_SIZE;
    else if (buffer_data_pkts <= 0)
        buffer_data_pkts = 1;
 
    curr_state = JammerStatus::IDLE;
}
 
int
Uwjammer::command(int argc, const char *const *argv)
{
    Tcl &tcl = Tcl::instance();
    if (argc == 2) {
        if (strcasecmp(argv[1], "getDataQueueSize") == 0) {
            tcl.resultf("%d", Q_data.size());
 
            return TCL_OK;
        } else if (strcasecmp(argv[1], "getJamSent") == 0) {
            tcl.resultf("%d", getJamSent());
 
            return TCL_OK;
        } else if (strcasecmp(argv[1], "getJamDiscarded") == 0) {
            tcl.resultf("%d", getJamDiscarded());
 
            return TCL_OK;
        } else if (strcasecmp(argv[1], "getDataDiscarded") == 0) {
            tcl.resultf("%d", getDataDiscarded());
 
            return TCL_OK;
        }
 
    } else if (argc == 3) {
        if (strcasecmp(argv[1], "setMacAddr") == 0) {
            const char *str = argv[2];
            char *end_ptr{};
            int mac_addr = std::strtol(str, &end_ptr, 10);
 
            if (str != end_ptr) {
                addr = mac_addr;
 
                return TCL_OK;
            }
 
            return TCL_ERROR;
        }
    }
 
    return MMac::command(argc, argv);
}
 
int
Uwjammer::crLayCommand(ClMessage *m)
{
    switch (m->type()) {
        default:
            return MMac::crLayCommand(m);
    }
}
 
void
Uwjammer::recvFromUpperLayers(Packet *p)
{
    if ((int) Q_data.size() < buffer_data_pkts) {
        if (debug_)
            std::cout << NOW << "Uwjammer(" << addr << ")::RECV_FROM_U_LAYERS_"
                      << std::endl;
 
        Q_data.push(p);
 
        if (curr_state == JammerStatus::IDLE)
            txJam();
 
    } else {
        if (debug_)
            std::cout << NOW << "Uwjammer(" << addr << ")::DROP_FULL_QUEUE"
                      << std::endl;
 
        n_jam_discarded++;
 
        drop(p, 1, UWJAMMER_DROP_REASON_BUFFER_FULL);
    }
}
 
void
Uwjammer::txJam()
{
    curr_data_pkt = (Q_data.front())->copy();
    Q_data.pop();
 
    hdr_cmn *ch = HDR_CMN(curr_data_pkt);
    hdr_mac *mach = HDR_MAC(curr_data_pkt);
    hdr_JAMMER *jammerhdr = HDR_JAMMER(curr_data_pkt);
 
    if (Q_data.size() > 0) {
        ch->ptype() = PT_JAMMER;
        ch->size() += sizeof(hdr_JAMMER);
    }
 
    jammerhdr->id_node() = node_id;
    mach->macSA() = addr;
 
    n_jam_sent++;
 
    Mac2PhyStartTx(curr_data_pkt);
}
 
void
Uwjammer::Mac2PhyStartTx(Packet *p)
{
    if (debug_)
        std::cout << NOW << "Uwjammer(" << addr << ")::BUSY_STATE" << std::endl;
 
    refreshState(JammerStatus::BUSY);
 
    MMac::Mac2PhyStartTx(p);
}
 
void
Uwjammer::Phy2MacEndTx(const Packet *p)
{
    MMac::Phy2MacEndTx(p);
 
    if (debug_)
        std::cout << NOW << "Uwjammer(" << addr
                  << ")::JAM_TRANSMITTED_AND_IDLE_STATE" << std::endl;
 
    refreshState(JammerStatus::IDLE);
    stateIdle();
}
 
void
Uwjammer::stateIdle()
{
    if ((int) Q_data.size() > 0)
        txJam();
}
 
void
Uwjammer::Phy2MacEndRx(Packet *p)
{
    if (debug_)
        std::cout << NOW << "Uwjammer(" << addr
                  << ")::DROP_DATA_PACKET_RECEIVED" << std::endl;
 
    n_data_discarded++;
 
    drop(p, 1, UWJAMMER_DROP_REASON_JAMMER_PROTOCOL);
}