packer-uwcbr.cpp

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//
// Copyright (c) 2013 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, 
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
#include "packer-uwcbr.h"
 
static class PackerUWCBRClass : public TclClass {
public:
 
    PackerUWCBRClass() : TclClass("UW/CBR/Packer") {
    }
 
    TclObject* create(int, const char*const*) {
        return (new packerUWCBR());
    }
} class_module_packerUWCBR;
 
packerUWCBR::packerUWCBR() : packer(false) {
    SN_Bits = 8 * sizeof (u_int32_t);
    RFTT_Bits = 0;
    RFTT_VALID_Bits = 0;
    TRAFFIC_TYPE_Bits = 0;
 
    bind("SN_Bits", (int*) &SN_Bits);
    bind("RFTT_Bits", (int*) &RFTT_Bits);
    bind("RFTT_VALID_Bits", (int*) &RFTT_VALID_Bits);
    bind("TRAFFIC_TYPE_Bits", (int*) &TRAFFIC_TYPE_Bits);
 
    if (debug_)
        cout << "Initialization (from constructor) of n_bits for the UWCBR packer " << endl;
 
    n_bits.clear();
 
    n_bits.push_back(SN_Bits);
    n_bits.push_back(RFTT_Bits);
    n_bits.push_back(RFTT_VALID_Bits);
    n_bits.push_back(TRAFFIC_TYPE_Bits);
 
}
 
packerUWCBR::~packerUWCBR() {
 
}
 
void packerUWCBR::init() {
 
    if (debug_)
        cout << "Re-initialization of n_bits for the UWCBR packer " << endl;
 
    n_bits.clear();
 
    n_bits.push_back(SN_Bits);
    n_bits.push_back(RFTT_Bits);
    n_bits.push_back(RFTT_VALID_Bits);
    n_bits.push_back(TRAFFIC_TYPE_Bits);
}
 
size_t packerUWCBR::packMyHdr(Packet* p, unsigned char* buf, size_t offset) {
 
    // Pointer to the UWCBR packet header
    hdr_cmn* ch = HDR_CMN(p);
    hdr_uwcbr* uch = HDR_UWCBR(p);
 
    if ( ch->ptype() == PT_UWCBR ) {
        int field_idx = 0;
 
        offset += put(buf, offset, &(uch->sn_), n_bits[field_idx++]);
 
        offset += put(buf, offset, &(uch->rftt_), n_bits[field_idx++]);
 
        offset += put(buf, offset, &(uch->rftt_valid_), n_bits[field_idx++]);
 
        offset += put(buf, offset, &(uch->traffic_type_), n_bits[field_idx++]);
 
        if (debug_) {
            printf("\033[0;46;30m TX CBR packer hdr \033[0m \n");
            printMyHdrFields(p);
        }
    }
 
    return offset;
}
 
size_t packerUWCBR::unpackMyHdr(unsigned char* buf, size_t offset, Packet* p) {
 
    // Pointer to the UWCBR packet header
    hdr_cmn* ch = HDR_CMN(p);
    hdr_uwcbr* uch = HDR_UWCBR(p);
 
    if ( ch->ptype() == PT_UWCBR ) {
        int field_idx = 0;
 
        memset(&(uch->sn_), 0, sizeof (uch->sn_));
        offset += get(buf, offset, &(uch->sn_), n_bits[field_idx++]);
 
        memset(&(uch->rftt_), 0, sizeof (uch->rftt_));
        offset += get(buf, offset, &(uch->rftt_), n_bits[field_idx++]);
 
        memset(&(uch->rftt_valid_), 0, sizeof (uch->rftt_valid_));
        offset += get(buf, offset, &(uch->rftt_valid_), n_bits[field_idx++]);
 
        memset(&(uch->traffic_type_), 0, sizeof (uch->traffic_type_));
        offset += get(buf, offset, &(uch->traffic_type_), n_bits[field_idx++]);
 
        if (debug_) {
            printf("\033[0;46;30m RX CBR packer hdr \033[0m \n");
            printMyHdrFields(p);
        }
    }
 
    return offset;
}
 
void packerUWCBR::printMyHdrMap() {
    std::cout << "\033[0;46;30m Packer Name \033[0m: UWCBR \n";
    std::cout << "\033[0;46;30m sn: \033[0m" << SN_Bits << " bits \n";
    std::cout << "\033[0;46;30m rftt: \033[0m" << RFTT_Bits << " bits \n";
    std::cout << "\033[0;46;30m rftt valid: \033[0m" << RFTT_VALID_Bits << " bits" << std::endl;
    std::cout << "\033[0;46;30m traffic type: \033[0m" << TRAFFIC_TYPE_Bits << " bits" << std::endl;
}
 
 
void packerUWCBR::printMyHdrFields(Packet* p) {
    hdr_uwcbr* uch = HDR_UWCBR(p);
    
    if (n_bits[0] != 0) std::cout << "\033[0;46;30m sn: \033[0m" << uch->sn() << std::endl;
    if (n_bits[1] != 0) std::cout << "\033[0;46;30m rftt: \033[0m" << uch->rftt() << std::endl;
    if (n_bits[2] != 0) std::cout << "\033[0;46;30m rftt_valid: \033[0m" << uch->rftt_valid() << std::endl;
    if (n_bits[3] != 0) std::cout << "\033[0;46;30m traffic_type: \033[0m" << uch->traffic_type() << std::endl;
}