PacketDrill.cc File Reference

#include "PacketDrill.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <cinttypes>
#include "PacketDrillUtils.h"
#include "inet/transportlayer/udp/UDPPacket_m.h"
#include "inet/transportlayer/tcp_common/TCPSegment_m.h"
#include "inet/networklayer/ipv4/IPv4Datagram_m.h"
#include "inet/transportlayer/contract/sctp/SCTPCommand_m.h"

Functions
TCPOption *	setOptionValues (PacketDrillTcpOption *opt)

Function Documentation

TCPOption* setOptionValues

(

PacketDrillTcpOption *

opt

)

Referenced by PacketDrill::buildTCPPacket().

{
    unsigned char length = opt->getLength();
    switch (opt->getKind()) {
        case TCPOPT_EOL: // EOL
            return new TCPOptionEnd();
        case TCPOPT_NOP: // NOP
            return new TCPOptionNop();
        case TCPOPT_MAXSEG:
            if (length == 4) {
                auto *option = new TCPOptionMaxSegmentSize();
                option->setLength(length);
                option->setMaxSegmentSize(opt->getMss());
                return option;
            }
            break;
        case TCPOPT_WINDOW:
            if (length == 3) {
                auto *option = new TCPOptionWindowScale();
                option->setLength(length);
                option->setWindowScale(opt->getWindowScale());
                return option;
            }
            break;
        case TCPOPT_SACK_PERMITTED:
            if (length == 2) {
                auto *option = new TCPOptionSackPermitted();
                option->setLength(length);
                return option;
            }
            break;
        case TCPOPT_SACK:
            if (length > 2 && (length % 8) == 2) {
                auto *option = new TCPOptionSack();
                option->setLength(length);
                option->setSackItemArraySize(length / 8);
                unsigned int count = 0;
                for (int i = 0; i < 2 * opt->getBlockList()->getLength(); i += 2) {
                    SackItem si;
                    si.setStart(((PacketDrillStruct *) opt->getBlockList()->get(i))->getValue1());
                    si.setEnd(((PacketDrillStruct *) opt->getBlockList()->get(i))->getValue2());
                    option->setSackItem(count++, si);
                }
                return option;
            }
            break;
        case TCPOPT_TIMESTAMP:
            if (length == 10) {
                auto *option = new TCPOptionTimestamp();
                option->setLength(length);
                option->setSenderTimestamp(opt->getVal());
                option->setEchoedTimestamp(opt->getEcr());
                return option;
            }
            break;
        default:
            EV_INFO << "TCP option is not supported (yet).";
            break;
    } // switch
    auto *option = new TCPOptionUnknown();
    option->setKind(opt->getKind());
    option->setLength(length);
    if (length > 2)
        option->setBytesArraySize(length - 2);
    for (unsigned int i = 2; i < length; i++)
        option->setBytes(i-2, length);
    return option;
}