reassign 537686 libpcap0.8 retitle 537686 Should support data access for IPv6 upper-layer protocols tags 537686 upstream severity 537686 wishlist quit
martin f krafft <[email protected]> writes: > # tcpdump -ni wifi icmp6 and '(icmp[icmptype] != icmp-echo)' and > '(icmp[icmptype] != icmp-echoreply)' > tcpdump: expression rejects all packets > Since icmp-echo and icmp-echoreply are disjunct and their union > a proper subset of icmp6, the expression does not yield the empty > set. ICMPv6 is not "ICMP in an IPv6 datagram", it's a different protocol. Since icmp[] implies icmp even if you're testing for non-equality, the expression is partly equivalent to 'icmp6 and icmp', which rejects all packets because it can never be true. What you meant to use is something like icmp6[icmptype], but that's not yet implemented in libpcap. Reassigning accordingly. -- Romain Francoise <[email protected]> http://people.debian.org/~rfrancoise/ -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
