2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
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14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Nathan Binkert
32 * Simple object for creating a simple pcap style packet trace
40 #include "base/misc.hh"
41 #include "base/output.hh"
42 #include "dev/etherdump.hh"
43 #include "sim/core.hh"
47 EtherDump::EtherDump(const Params
*p
)
48 : SimObject(p
), stream(simout
.create(p
->file
, true)),
53 #define DLT_EN10MB 1 // Ethernet (10Mb)
54 #define TCPDUMP_MAGIC 0xa1b2c3d4
55 #define PCAP_VERSION_MAJOR 2
56 #define PCAP_VERSION_MINOR 4
58 struct pcap_file_header
{
60 uint16_t version_major
;
61 uint16_t version_minor
;
62 int32_t thiszone
; // gmt to local correction
63 uint32_t sigfigs
; // accuracy of timestamps
64 uint32_t snaplen
; // max length saved portion of each pkt
65 uint32_t linktype
; // data link type (DLT_*)
70 uint32_t microseconds
;
71 uint32_t caplen
; // length of portion present
72 uint32_t len
; // length this packet (off wire)
78 struct pcap_file_header hdr
;
79 hdr
.magic
= TCPDUMP_MAGIC
;
80 hdr
.version_major
= PCAP_VERSION_MAJOR
;
81 hdr
.version_minor
= PCAP_VERSION_MINOR
;
86 hdr
.linktype
= DLT_EN10MB
;
88 stream
->write(reinterpret_cast<char *>(&hdr
), sizeof(hdr
));
94 EtherDump::dumpPacket(EthPacketPtr
&packet
)
97 pkthdr
.seconds
= curTick() / SimClock::Int::s
;
98 pkthdr
.microseconds
= (curTick() / SimClock::Int::us
) % ULL(1000000);
99 pkthdr
.caplen
= std::min(packet
->length
, maxlen
);
100 pkthdr
.len
= packet
->length
;
101 stream
->write(reinterpret_cast<char *>(&pkthdr
), sizeof(pkthdr
));
102 stream
->write(reinterpret_cast<char *>(packet
->data
), pkthdr
.caplen
);
107 EtherDumpParams::create()
109 return new EtherDump(this);