cvs commit: src/sys/netinet ip_fw2.c src/sys/sys mbuf.h

Max Laier max at
Fri Jul 16 20:40:28 PDT 2004

On Saturday 17 July 2004 04:40, Juli Mallett wrote:
> jmallett    2004-07-17 02:40:14 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/netinet          ip_fw2.c
>     sys/sys              mbuf.h
>   Log:
>   Make M_SKIP_FIREWALL a global (and semantic) flag, preventing anything
> from using M_PROTO6 and possibly shooting someone's foot, as well as
> allowing the firewall to be used in multiple passes, or with a packet
> classifier frontend, that may need to explicitly allow a certain packet. 
> Presently this is handled in the ipfw_chk code as before, though I have run
> with it moved to upper layers, and possibly it should apply to ipfilter and
> pf as well, though this has not been investigated.

pf does something to the same effect by prepending a mbuf with the 
"PACKET_TAG_PF_GENERATED" mbuf_tag to skip processing for its own packets. If 
we can agree that the presence of M_SKIP_FIREWALL is copied to icmp error 
messages I will happily replace the mbuf tag with the more general flag 
(which will perform significantly better, I believe). Please tell me what you 
think of this.

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