| /* |
| * Copyright (c) 2002-2005 The Regents of The University of Michigan |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * 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; |
| * neither the name of the copyright holders 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. |
| */ |
| |
| /* @file |
| * Simple object for creating a simple pcap style packet trace |
| */ |
| |
| #include <sys/time.h> |
| |
| #include <algorithm> |
| #include <string> |
| |
| #include "base/misc.hh" |
| #include "base/output.hh" |
| #include "dev/etherdump.hh" |
| #include "sim/builder.hh" |
| #include "sim/root.hh" |
| |
| using std::string; |
| |
| EtherDump::EtherDump(const string &name, const string &file, int max) |
| : SimObject(name), stream(file.c_str()), maxlen(max) |
| { |
| } |
| |
| #define DLT_EN10MB 1 // Ethernet (10Mb) |
| #define TCPDUMP_MAGIC 0xa1b2c3d4 |
| #define PCAP_VERSION_MAJOR 2 |
| #define PCAP_VERSION_MINOR 4 |
| |
| struct pcap_file_header { |
| uint32_t magic; |
| uint16_t version_major; |
| uint16_t version_minor; |
| int32_t thiszone; // gmt to local correction |
| uint32_t sigfigs; // accuracy of timestamps |
| uint32_t snaplen; // max length saved portion of each pkt |
| uint32_t linktype; // data link type (DLT_*) |
| }; |
| |
| struct pcap_pkthdr { |
| uint32_t seconds; |
| uint32_t microseconds; |
| uint32_t caplen; // length of portion present |
| uint32_t len; // length this packet (off wire) |
| }; |
| |
| void |
| EtherDump::init() |
| { |
| curtime = time(NULL); |
| struct pcap_file_header hdr; |
| hdr.magic = TCPDUMP_MAGIC; |
| hdr.version_major = PCAP_VERSION_MAJOR; |
| hdr.version_minor = PCAP_VERSION_MINOR; |
| |
| hdr.thiszone = -5 * 3600; |
| hdr.snaplen = 1500; |
| hdr.sigfigs = 0; |
| hdr.linktype = DLT_EN10MB; |
| |
| stream.write(reinterpret_cast<char *>(&hdr), sizeof(hdr)); |
| |
| /* |
| * output an empty packet with the current time so that we know |
| * when the simulation began. This allows us to correlate packets |
| * to sim_cycles. |
| */ |
| pcap_pkthdr pkthdr; |
| pkthdr.seconds = curtime; |
| pkthdr.microseconds = 0; |
| pkthdr.caplen = 0; |
| pkthdr.len = 0; |
| stream.write(reinterpret_cast<char *>(&pkthdr), sizeof(pkthdr)); |
| |
| stream.flush(); |
| } |
| |
| void |
| EtherDump::dumpPacket(PacketPtr &packet) |
| { |
| pcap_pkthdr pkthdr; |
| pkthdr.seconds = curtime + (curTick / Clock::Int::s); |
| pkthdr.microseconds = (curTick / Clock::Int::us) % ULL(1000000); |
| pkthdr.caplen = std::min(packet->length, maxlen); |
| pkthdr.len = packet->length; |
| stream.write(reinterpret_cast<char *>(&pkthdr), sizeof(pkthdr)); |
| stream.write(reinterpret_cast<char *>(packet->data), pkthdr.caplen); |
| stream.flush(); |
| } |
| |
| BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherDump) |
| |
| Param<string> file; |
| Param<int> maxlen; |
| |
| END_DECLARE_SIM_OBJECT_PARAMS(EtherDump) |
| |
| BEGIN_INIT_SIM_OBJECT_PARAMS(EtherDump) |
| |
| INIT_PARAM_DFLT(file, "file to dump packets to", "etherdump"), |
| INIT_PARAM_DFLT(maxlen, "max portion of packet data to dump", 96) |
| |
| END_INIT_SIM_OBJECT_PARAMS(EtherDump) |
| |
| CREATE_SIM_OBJECT(EtherDump) |
| { |
| return new EtherDump(getInstanceName(), simout.resolve(file), maxlen); |
| } |
| |
| REGISTER_SIM_OBJECT("EtherDump", EtherDump) |