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Diffstat (limited to 'src/dev/net/etherdump.cc')
-rw-r--r-- | src/dev/net/etherdump.cc | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/dev/net/etherdump.cc b/src/dev/net/etherdump.cc new file mode 100644 index 000000000..c537fbf57 --- /dev/null +++ b/src/dev/net/etherdump.cc @@ -0,0 +1,110 @@ +/* + * 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. + * + * Authors: Nathan Binkert + */ + +/* @file + * Simple object for creating a simple pcap style packet trace + */ +#include "dev/net/etherdump.hh" + +#include <sys/time.h> + +#include <algorithm> +#include <string> + +#include "base/misc.hh" +#include "base/output.hh" +#include "sim/core.hh" + +using std::string; + +EtherDump::EtherDump(const Params *p) + : SimObject(p), stream(simout.create(p->file, true)), + maxlen(p->maxlen) +{ +} + +#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() +{ + struct pcap_file_header hdr; + hdr.magic = TCPDUMP_MAGIC; + hdr.version_major = PCAP_VERSION_MAJOR; + hdr.version_minor = PCAP_VERSION_MINOR; + + hdr.thiszone = 0; + hdr.snaplen = 1500; + hdr.sigfigs = 0; + hdr.linktype = DLT_EN10MB; + + stream->write(reinterpret_cast<char *>(&hdr), sizeof(hdr)); + + stream->flush(); +} + +void +EtherDump::dumpPacket(EthPacketPtr &packet) +{ + pcap_pkthdr pkthdr; + pkthdr.seconds = curTick() / SimClock::Int::s; + pkthdr.microseconds = (curTick() / SimClock::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(); +} + +EtherDump * +EtherDumpParams::create() +{ + return new EtherDump(this); +} |