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#------------------------------------------------------------------------------ # $File: sniffer,v 1.17 2011/07/11 19:42:02 christos Exp $ # sniffer: file(1) magic for packet capture files # # From: guy@alum.mit.edu (Guy Harris) #

# # Microsoft Network Monitor 1.x capture files. # 0 string RTSS NetMon capture file >5 byte x - version %d >4 byte x b.%d >6 leshort 0 (Unknown) >6 leshort 1 (Ethernet) >6 leshort 2 (Token Ring) >6 leshort 3 (FDDI) >6 leshort 4 (ATM)

# # Microsoft Network Monitor 2.x capture files. # 0 string GMBU NetMon capture file >5 byte x - version %d >4 byte x b.%d >6 leshort 0 (Unknown) >6 leshort 1 (Ethernet) >6 leshort 2 (Token Ring) >6 leshort 3 (FDDI) >6 leshort 4 (ATM)

# # Network General Sniffer capture files. # Sorry, make that "Network Associates Sniffer capture files." # Sorry, make that "Network General old DOS Sniffer capture files." # 0 string TRSNIFF\ data\ \ \ \ 032 Sniffer capture file >33 byte 2 (compressed) >23 leshort x - version %d >25 leshort x b.%d >32 byte 0 (Token Ring) >32 byte 1 (Ethernet) >32 byte 2 (ARCNET) >32 byte 3 (StarLAN) >32 byte 4 (PC Network broadband) >32 byte 5 (LocalTalk) >32 byte 6 (Znet) >32 byte 7 (Internetwork Analyzer) >32 byte 9 (FDDI) >32 byte 10 (ATM)

# # Cinco Networks NetXRay capture files. # Sorry, make that "Network General Sniffer Basic capture files." # Sorry, make that "Network Associates Sniffer Basic capture files." # Sorry, make that "Network Associates Sniffer Basic, and Windows # Sniffer Pro", capture files." # Sorry, make that "Network General Sniffer capture files." # 0 string XCP0 NetXRay capture file >4 string >0 - version %s >44 leshort 0 (Ethernet) >44 leshort 1 (Token Ring) >44 leshort 2 (FDDI) >44 leshort 3 (WAN) >44 leshort 8 (ATM) >44 leshort 9 (802.11)

# # "libpcap" capture files. # (We call them "tcpdump capture file(s)" for now, as "tcpdump" is # the main program that uses that format, but there are other programs # that use "libpcap", or that use the same capture file format.) # 0 ubelong 0xa1b2c3d4 tcpdump capture file (big-endian) !:mime application/vnd.tcpdump.pcap >4 beshort x - version %d >6 beshort x b.%d >20 belong 0 (No link-layer encapsulation >20 belong 1 (Ethernet >20 belong 2 (3Mb Ethernet >20 belong 3 (AX.25 >20 belong 4 (ProNET >20 belong 5 (CHAOS >20 belong 6 (Token Ring >20 belong 7 (BSD ARCNET >20 belong 8 (SLIP >20 belong 9 (PPP >20 belong 10 (FDDI >20 belong 11 (RFC 1483 ATM >20 belong 12 (raw IP >20 belong 13 (BSD/OS SLIP >20 belong 14 (BSD/OS PPP >20 belong 19 (Linux ATM Classical IP >20 belong 50 (PPP or Cisco HDLC >20 belong 51 (PPP-over-Ethernet >20 belong 99 (Symantec Enterprise Firewall >20 belong 100 (RFC 1483 ATM >20 belong 101 (raw IP >20 belong 102 (BSD/OS SLIP >20 belong 103 (BSD/OS PPP >20 belong 104 (BSD/OS Cisco HDLC >20 belong 105 (802.11 >20 belong 106 (Linux Classical IP over ATM >20 belong 107 (Frame Relay >20 belong 108 (OpenBSD loopback >20 belong 109 (OpenBSD IPsec encrypted >20 belong 112 (Cisco HDLC >20 belong 113 (Linux "cooked" >20 belong 114 (LocalTalk >20 belong 117 (OpenBSD PFLOG >20 belong 119 (802.11 with Prism header >20 belong 122 (RFC 2625 IP over Fibre Channel >20 belong 123 (SunATM >20 belong 127 (802.11 with radiotap header >20 belong 129 (Linux ARCNET >20 belong 138 (Apple IP over IEEE 1394 >20 belong 140 (MTP2 >20 belong 141 (MTP3 >20 belong 143 (DOCSIS >20 belong 144 (IrDA >20 belong 147 (Private use 0 >20 belong 148 (Private use 1 >20 belong 149 (Private use 2 >20 belong 150 (Private use 3 >20 belong 151 (Private use 4 >20 belong 152 (Private use 5 >20 belong 153 (Private use 6 >20 belong 154 (Private use 7 >20 belong 155 (Private use 8 >20 belong 156 (Private use 9 >20 belong 157 (Private use 10 >20 belong 158 (Private use 11 >20 belong 159 (Private use 12 >20 belong 160 (Private use 13 >20 belong 161 (Private use 14 >20 belong 162 (Private use 15 >20 belong 163 (802.11 with AVS header >16 belong x b, capture length %d) 0 ulelong 0xa1b2c3d4 tcpdump capture file (little-endian) !:mime application/vnd.tcpdump.pcap >4 leshort x - version %d >6 leshort x b.%d >20 lelong 0 (No link-layer encapsulation >20 lelong 1 (Ethernet >20 lelong 2 (3Mb Ethernet >20 lelong 3 (AX.25 >20 lelong 4 (ProNET >20 lelong 5 (CHAOS >20 lelong 6 (Token Ring >20 lelong 7 (ARCNET >20 lelong 8 (SLIP >20 lelong 9 (PPP >20 lelong 10 (FDDI >20 lelong 11 (RFC 1483 ATM >20 lelong 12 (raw IP >20 lelong 13 (BSD/OS SLIP >20 lelong 14 (BSD/OS PPP >20 lelong 19 (Linux ATM Classical IP >20 lelong 50 (PPP or Cisco HDLC >20 lelong 51 (PPP-over-Ethernet >20 lelong 99 (Symantec Enterprise Firewall >20 lelong 100 (RFC 1483 ATM >20 lelong 101 (raw IP >20 lelong 102 (BSD/OS SLIP >20 lelong 103 (BSD/OS PPP >20 lelong 104 (BSD/OS Cisco HDLC >20 lelong 105 (802.11 >20 lelong 106 (Linux Classical IP over ATM >20 lelong 107 (Frame Relay >20 lelong 108 (OpenBSD loopback >20 lelong 109 (OpenBSD IPsec encrypted >20 lelong 112 (Cisco HDLC >20 lelong 113 (Linux "cooked" >20 lelong 114 (LocalTalk >20 lelong 117 (OpenBSD PFLOG >20 lelong 119 (802.11 with Prism header >20 lelong 122 (RFC 2625 IP over Fibre Channel >20 lelong 123 (SunATM >20 lelong 127 (802.11 with radiotap header >20 lelong 129 (Linux ARCNET >20 lelong 138 (Apple IP over IEEE 1394 >20 lelong 140 (MTP2 >20 lelong 141 (MTP3 >20 lelong 143 (DOCSIS >20 lelong 144 (IrDA >20 lelong 147 (Private use 0 >20 lelong 148 (Private use 1 >20 lelong 149 (Private use 2 >20 lelong 150 (Private use 3 >20 lelong 151 (Private use 4 >20 lelong 152 (Private use 5 >20 lelong 153 (Private use 6 >20 lelong 154 (Private use 7 >20 lelong 155 (Private use 8 >20 lelong 156 (Private use 9 >20 lelong 157 (Private use 10 >20 lelong 158 (Private use 11 >20 lelong 159 (Private use 12 >20 lelong 160 (Private use 13 >20 lelong 161 (Private use 14 >20 lelong 162 (Private use 15 >20 lelong 163 (802.11 with AVS header >16 lelong x b, capture length %d)

# # "libpcap"-with-Alexey-Kuznetsov's-patches capture files. # (We call them "tcpdump capture file(s)" for now, as "tcpdump" is # the main program that uses that format, but there are other programs # that use "libpcap", or that use the same capture file format.) # 0 ubelong 0xa1b2cd34 extended tcpdump capture file (big-endian) >4 beshort x - version %d >6 beshort x b.%d >20 belong 0 (No link-layer encapsulation >20 belong 1 (Ethernet >20 belong 2 (3Mb Ethernet >20 belong 3 (AX.25 >20 belong 4 (ProNET >20 belong 5 (CHAOS >20 belong 6 (Token Ring >20 belong 7 (ARCNET >20 belong 8 (SLIP >20 belong 9 (PPP >20 belong 10 (FDDI >20 belong 11 (RFC 1483 ATM >20 belong 12 (raw IP >20 belong 13 (BSD/OS SLIP >20 belong 14 (BSD/OS PPP >16 belong x b, capture length %d) 0 ulelong 0xa1b2cd34 extended tcpdump capture file (little-endian) >4 leshort x - version %d >6 leshort x b.%d >20 lelong 0 (No link-layer encapsulation >20 lelong 1 (Ethernet >20 lelong 2 (3Mb Ethernet >20 lelong 3 (AX.25 >20 lelong 4 (ProNET >20 lelong 5 (CHAOS >20 lelong 6 (Token Ring >20 lelong 7 (ARCNET >20 lelong 8 (SLIP >20 lelong 9 (PPP >20 lelong 10 (FDDI >20 lelong 11 (RFC 1483 ATM >20 lelong 12 (raw IP >20 lelong 13 (BSD/OS SLIP >20 lelong 14 (BSD/OS PPP >16 lelong x b, capture length %d)

# # "pcapng" capture files. # www.winpcap.org/ntar/draft/PCAP-DumpFileFormat.html # 0 ubelong 0x0a0d0d0a >8 ubelong 0x1a2b3c4d pcapng capture file (big-endian) >>12 beshort x - version %d >>14 beshort x b.%d >8 ulelong 0x1a2b3c4d pcapng capture file (little-endian) >>12 leshort x - version %d >>14 leshort x b.%d

# # "pcap-ng" capture files. # www.winpcap.org/ntar/draft/PCAP-DumpFileFormat.html # Pcap-ng files can contain multiple sections. Printing the endianness, # snaplen, or other information from the first SHB may be misleading. # 0 ubelong 0x0a0d0d0a >8 ubelong 0x1a2b3c4d pcap-ng capture file >>12 beshort x - version %d >>14 beshort x b.%d 0 ulelong 0x0a0d0d0a >8 ulelong 0x1a2b3c4d pcap-ng capture file >>12 leshort x - version %d >>14 leshort x b.%d

# # AIX "iptrace" capture files. # 0 string iptrace\ 1.0 "iptrace" capture file 0 string iptrace\ 2.0 "iptrace" capture file

# # Novell LANalyzer capture files. # 0 leshort 0x1001 LANalyzer capture file 0 leshort 0x1007 LANalyzer capture file

# # HP-UX "nettl" capture files. # 0 string x54x52x00x64x00 "nettl" capture file

# # RADCOM WAN/LAN Analyzer capture files. # 0 string x42xd2x00x34x12x66x22x88 RADCOM WAN/LAN Analyzer capture file

# # NetStumbler log files. Not really packets, per se, but about as # close as you can get. These are log files from NetStumbler, a # Windows program, that scans for 802.11b networks. # 0 string NetS NetStumbler log file >8 lelong x b, %d stations found

# # EtherPeek/AiroPeek "version 9" capture files. # 0 string 177ver EtherPeek/AiroPeek capture file

# # Visual Networks traffic capture files. # 0 string x05VNF Visual Networks traffic capture file

# # Network Instruments Observer capture files. # 0 string ObserverPktBuffe Network Instruments Observer capture file

# # Files from Accellent Group's 5View products. # 0 string xaaxaaxaaxaa 5View capture file

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