cvs commit: src/sbin/ipfw ipfw2.c
Christian S.J. Peron
csjp at FreeBSD.org
Sat Sep 11 12:44:29 PDT 2004
csjp 2004-09-11 19:44:29 UTC
FreeBSD src repository
Currently when ipfw(8) generates the micro-instructions for rules which
contain O_UID, O_GID and O_JAIL opcodes, the F_NOT or F_OR logical
operator bits get clobbered. Making it impossible to use the ``NOT'' or
``OR'' operators with uid, gid and jail based constraints.
The ipfw_insn instruction template contains a ``len'' element which
stores two pieces of information, the size of the instruction
(in 32-bit words) in the low 6 bits of "len" with the 2 remaining
bits to implement OR and NOT.
The current code clobbers the OR and NOT bits by initializing the
``len'' element to the size, rather than OR'ing the bits. This change
fixes this by changing the initialization of cmd->len to an OR operation
for the O_UID, O_GID and O_JAIL opcodes.
This may be a MFC candidate for RELENG_5.
Reviewed by: andre
Approved by: luigi
PR: kern/63961 (partially)
Revision Changes Path
1.58 +3 -3 src/sbin/ipfw/ipfw2.c
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