2 * Copyright (c) 2003 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
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30 * Simple object for creating a simple pcap style packet trace
37 #include "dev/etherdump.hh"
38 #include "sim/builder.hh"
39 #include "sim/universe.hh"
43 EtherDump::EtherDump(const string
&name
, const string
&file
)
47 stream
.open(file
.c_str());
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_*)
69 struct timeval ts
; // time stamp
70 uint32_t caplen
; // length of portion present
71 uint32_t len
; // length this packet (off wire)
78 s_freq
= ticksPerSecond
;
79 us_freq
= ticksPerSecond
/ ULL(1000000);
81 struct pcap_file_header hdr
;
82 hdr
.magic
= TCPDUMP_MAGIC
;
83 hdr
.version_major
= PCAP_VERSION_MAJOR
;
84 hdr
.version_minor
= PCAP_VERSION_MINOR
;
86 hdr
.thiszone
= -5 * 3600;
89 hdr
.linktype
= DLT_EN10MB
;
91 stream
.write(reinterpret_cast<char *>(&hdr
), sizeof(hdr
));
94 * output an empty packet with the current time so that we know
95 * when the simulation began. This allows us to correlate packets
99 pkthdr
.ts
.tv_sec
= curtime
;
100 pkthdr
.ts
.tv_usec
= 0;
103 stream
.write(reinterpret_cast<char *>(&pkthdr
), sizeof(pkthdr
));
109 EtherDump::dumpPacket(PacketPtr packet
)
112 pkthdr
.ts
.tv_sec
= curtime
+ (curTick
/ s_freq
);
113 pkthdr
.ts
.tv_usec
= (curTick
/ us_freq
) % ULL(1000000);
114 pkthdr
.caplen
= packet
->length
;
115 pkthdr
.len
= packet
->length
;
116 stream
.write(reinterpret_cast<char *>(&pkthdr
), sizeof(pkthdr
));
117 stream
.write(reinterpret_cast<char *>(packet
->data
), packet
->length
);
121 BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherDump
)
125 END_DECLARE_SIM_OBJECT_PARAMS(EtherDump
)
127 BEGIN_INIT_SIM_OBJECT_PARAMS(EtherDump
)
129 INIT_PARAM_DFLT(file
, "file to dump packets to", "")
131 END_INIT_SIM_OBJECT_PARAMS(EtherDump
)
133 CREATE_SIM_OBJECT(EtherDump
)
135 return new EtherDump(getInstanceName(), file
);
138 REGISTER_SIM_OBJECT("EtherDump", EtherDump
)