https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222746
Bug ID: 222746
Summary: ipfw: tcpdatalen does not exactly match IPv6 packets.
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 186874
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=186874&action=edit
patch for CURRENT
tcpdatalen rule option does not match IPv6 packets correctly because code for
IPv6 is not implemented.
# ipfw show 3100
03100 1819 135800 count log logamount 1000 tcp from any to any { tcpflags
syn or tcpflags rst } tcpdatalen 32768-65535 // signed negative number range
The size of 1819 packets was over 32768 bytes, but the total was 135800 bytes.
tested on
# uname -a
FreeBSD T2.test 10.4-PRERELEASE FreeBSD 10.4-PRERELEASE #0 r324142M: Sun Oct 1
01:25:30 UTC 2017 [email protected]:/usr/obj/usr/src/sys/GENERIC amd64
A patch needs to be tested by people who know them well.
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