#------------------------------------------------------------------------------ # sniffer: file(1) magic for packet captured files # # From: guy@netapp.com (Guy Harris) # # Microsoft NetMon (packet capture/display program) capture files. # 0 string RTSS NetMon capture file >4 byte x - version %d >5 byte x \b.%d # # Network General Sniffer capture files. # 0 string TRSNIFF\ data\ \ \ \ \032 Sniffer capture file >23 leshort x - version %d >25 leshort x \b.%d >33 byte x (Format %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) # # "libpcap" capture files. # (We call them "tcpdump capture file(s)" for now, as "tcpdump" is # the main program that uses that format, but there's also "tcpview", # and there may be others in the future.) # 0 ubelong 0xa1b2c3d4 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 (IEEE 802.x network >20 belong 7 (ARCnet >20 belong 8 (SLIP >20 belong 9 (PPP >20 belong 10 (FDDI >20 belong 11 (RFC 1483 ATM >16 belong x \b, capture length %d) 0 ulelong 0xa1b2c3d4 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 (IEEE 802.x network >20 lelong 7 (ARCnet >20 lelong 8 (SLIP >20 lelong 9 (PPP >20 lelong 10 (FDDI >20 lelong 11 (RFC 1483 ATM >16 lelong x \b, capture length %d)