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Fixes for IPv6 truncation and ICMP/ICMP6 analysis.

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- Add more guards against trying to analyze captured packets with a
  truncated IPv6 static header or extension header chain.

- Add back in the ICMP payload tracking for ICMP "connections".

- Fix 'icmp_context' record construction.  Some field assignments
  were mismatched for ICMP and ICMP6.  Source and destination
  addresses were set incorrectly for context packets that don't
  contain a full IP header.  Some fields for ICMP6 weren't filled out.

- Changed ICMP Time Exceeded packets to raise the 'icmp_time_exceeded'
  event instead of 'icmp_error_message'.

- Add unit tests for truncation and the main types of ICMP/ICMP6
  that have specific events.

- Documentation clarifications.
This commit is contained in:
Jon Siwek 2012-04-11 16:27:31 -05:00
parent 27ba3118c1
commit 51bad73e1e
39 changed files with 422 additions and 52 deletions
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20
testing/btest/Baseline/core.icmp.icmp-events/output Normal file
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icmp_unreachable (code=3)
conn_id: [orig_h=192.168.1.102, orig_p=3/icmp, resp_h=192.168.1.1, resp_p=3/icmp]
icmp_conn: [orig_h=192.168.1.102, resp_h=192.168.1.1, itype=3, icode=3, len=148, v6=F]
icmp_context: [id=[orig_h=192.168.1.1, orig_p=53/udp, resp_h=192.168.1.102, resp_p=59207/udp], len=163, proto=2, frag_offset=0, bad_hdr_len=F, bad_checksum=F, MF=F, DF=F]
icmp_time_exceeded (code=0)
conn_id: [orig_h=10.0.0.1, orig_p=11/icmp, resp_h=10.0.0.2, resp_p=0/icmp]
icmp_conn: [orig_h=10.0.0.1, resp_h=10.0.0.2, itype=11, icode=0, len=32, v6=F]
icmp_context: [id=[orig_h=10.0.0.2, orig_p=30000/udp, resp_h=10.0.0.1, resp_p=13000/udp], len=32, proto=2, frag_offset=0, bad_hdr_len=F, bad_checksum=F, MF=F, DF=F]
icmp_echo_request (id=34844, seq=0, payload=O\x85\xe0C\0^N\xeb\xff^H^I^J^K^L^M^N^O^P^Q^R^S^T^U^V^W^X^Y^Z\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./01234567)
conn_id: [orig_h=10.0.0.1, orig_p=8/icmp, resp_h=74.125.225.99, resp_p=0/icmp]
icmp_conn: [orig_h=10.0.0.1, resp_h=74.125.225.99, itype=8, icode=0, len=56, v6=F]
icmp_echo_reply (id=34844, seq=0, payload=O\x85\xe0C\0^N\xeb\xff^H^I^J^K^L^M^N^O^P^Q^R^S^T^U^V^W^X^Y^Z\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./01234567)
conn_id: [orig_h=10.0.0.1, orig_p=8/icmp, resp_h=74.125.225.99, resp_p=0/icmp]
icmp_conn: [orig_h=10.0.0.1, resp_h=74.125.225.99, itype=8, icode=0, len=56, v6=F]
icmp_echo_request (id=34844, seq=1, payload=O\x85\xe0D\0^N\xf0}^H^I^J^K^L^M^N^O^P^Q^R^S^T^U^V^W^X^Y^Z\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./01234567)
conn_id: [orig_h=10.0.0.1, orig_p=8/icmp, resp_h=74.125.225.99, resp_p=0/icmp]
icmp_conn: [orig_h=10.0.0.1, resp_h=74.125.225.99, itype=8, icode=0, len=56, v6=F]
icmp_echo_reply (id=34844, seq=1, payload=O\x85\xe0D\0^N\xf0}^H^I^J^K^L^M^N^O^P^Q^R^S^T^U^V^W^X^Y^Z\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./01234567)
conn_id: [orig_h=10.0.0.1, orig_p=8/icmp, resp_h=74.125.225.99, resp_p=0/icmp]
icmp_conn: [orig_h=10.0.0.1, resp_h=74.125.225.99, itype=8, icode=0, len=56, v6=F]