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6908d1b919
Previously, a single `icmp_conn` record was built per ICMP "connection"
and re-used for all events generated from it. This may have been a
historical attempt at performance optimization, but:
* By default, Zeek does not load any scripts that handle ICMP events.
* The one script Zeek ships with that does handle ICMP events,
"detect-traceroute", is already noted as being disabled due to
potential performance problems of doing that kind of analysis.
* Re-use of the original `icmp_conn` record tends to misreport
TTL and length values since they come from original packet instead
of the current one.
* Even if we chose to still re-use `icmp_conn` records and just fill
in a new TTL and length value each packet, a user script could have
stored a reference to the record and not be expecting those values
to be changed out from underneath them.
Now, a new `icmp_info` record is created/populated in all ICMP events
and should be used instead of `icmp_conn`. It also removes the
orig_h/resp_h fields as those are redundant with what's already
available in the connection record.
73 lines
4.4 KiB
Text
73 lines
4.4 KiB
Text
icmp_unreachable (code=0)
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conn_id: [orig_h=fe80::dead, orig_p=1/icmp, resp_h=fe80::beef, resp_p=0/icmp]
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icmp_info: [v6=T, itype=1, icode=0, len=60, ttl=64]
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icmp_context: [id=[orig_h=fe80::beef, orig_p=30000/udp, resp_h=fe80::dead, resp_p=13000/udp], len=60, proto=2, frag_offset=0, bad_hdr_len=F, bad_checksum=F, MF=F, DF=F]
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icmp_packet_too_big (code=0)
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conn_id: [orig_h=fe80::dead, orig_p=2/icmp, resp_h=fe80::beef, resp_p=0/icmp]
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icmp_info: [v6=T, itype=2, icode=0, len=52, ttl=64]
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icmp_context: [id=[orig_h=fe80::beef, orig_p=30000/udp, resp_h=fe80::dead, resp_p=13000/udp], len=52, proto=2, frag_offset=0, bad_hdr_len=F, bad_checksum=F, MF=F, DF=F]
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icmp_time_exceeded (code=0)
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conn_id: [orig_h=fe80::dead, orig_p=3/icmp, resp_h=fe80::beef, resp_p=0/icmp]
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icmp_info: [v6=T, itype=3, icode=0, len=52, ttl=64]
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icmp_context: [id=[orig_h=fe80::beef, orig_p=30000/udp, resp_h=fe80::dead, resp_p=13000/udp], len=52, proto=2, frag_offset=0, bad_hdr_len=F, bad_checksum=F, MF=F, DF=F]
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icmp_parameter_problem (code=0)
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conn_id: [orig_h=fe80::dead, orig_p=4/icmp, resp_h=fe80::beef, resp_p=0/icmp]
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icmp_info: [v6=T, itype=4, icode=0, len=52, ttl=64]
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icmp_context: [id=[orig_h=fe80::beef, orig_p=30000/udp, resp_h=fe80::dead, resp_p=13000/udp], len=52, proto=2, frag_offset=0, bad_hdr_len=F, bad_checksum=F, MF=F, DF=F]
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icmp_echo_request (id=1, seq=3, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=128, icode=0, len=32, ttl=128]
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icmp_echo_reply (id=1, seq=3, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=129, icode=0, len=32, ttl=47]
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icmp_echo_request (id=1, seq=4, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=128, icode=0, len=32, ttl=128]
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icmp_echo_reply (id=1, seq=4, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=129, icode=0, len=32, ttl=47]
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icmp_echo_request (id=1, seq=5, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=128, icode=0, len=32, ttl=128]
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icmp_echo_reply (id=1, seq=5, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=129, icode=0, len=32, ttl=47]
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icmp_echo_request (id=1, seq=6, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=128, icode=0, len=32, ttl=128]
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icmp_echo_reply (id=1, seq=6, payload=abcdefghijklmnopqrstuvwabcdefghi)
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conn_id: [orig_h=2620:0:e00:400e:d1d:db37:beb:5aac, orig_p=128/icmp, resp_h=2001:4860:8006::63, resp_p=129/icmp]
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icmp_info: [v6=T, itype=129, icode=0, len=32, ttl=47]
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icmp_redirect (tgt=fe80::cafe, dest=fe80::babe)
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conn_id: [orig_h=fe80::dead, orig_p=137/icmp, resp_h=fe80::beef, resp_p=0/icmp]
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icmp_info: [v6=T, itype=137, icode=0, len=32, ttl=255]
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options: []
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icmp_router_advertisement
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cur_hop_limit=13
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managed=T
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other=F
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home_agent=T
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pref=3
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proxy=F
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rsv=0
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router_lifetime=30.0 mins
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reachable_time=3.0 secs 700.0 msecs
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retrans_timer=1.0 sec 300.0 msecs
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conn_id: [orig_h=fe80::dead, orig_p=134/icmp, resp_h=fe80::beef, resp_p=133/icmp]
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icmp_info: [v6=T, itype=134, icode=0, len=8, ttl=255]
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options: []
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icmp_neighbor_advertisement (tgt=fe80::babe)
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router=T
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solicited=F
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override=T
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conn_id: [orig_h=fe80::dead, orig_p=136/icmp, resp_h=fe80::beef, resp_p=135/icmp]
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icmp_info: [v6=T, itype=136, icode=0, len=16, ttl=255]
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options: []
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icmp_router_solicitation
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conn_id: [orig_h=fe80::dead, orig_p=133/icmp, resp_h=fe80::beef, resp_p=134/icmp]
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icmp_info: [v6=T, itype=133, icode=0, len=0, ttl=255]
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options: []
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icmp_neighbor_solicitation (tgt=fe80::babe)
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conn_id: [orig_h=fe80::dead, orig_p=135/icmp, resp_h=fe80::beef, resp_p=136/icmp]
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icmp_info: [v6=T, itype=135, icode=0, len=16, ttl=255]
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options: []
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