Date: Sun, 16 Sep 2012 13:13:02 +0000 (UTC) From: "Alexander V. Chernikov" <melifaro@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r240561 - head/share/man/man9 Message-ID: <201209161313.q8GDD2LH091522@svn.freebsd.org>
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Author: melifaro Date: Sun Sep 16 13:13:02 2012 New Revision: 240561 URL: http://svn.freebsd.org/changeset/base/240561 Log: Add section describing existing filtering points. Document byteorder behavior in AF_INET[6] hooks in new section. MFC after: 2 weeks Modified: head/share/man/man9/pfil.9 Modified: head/share/man/man9/pfil.9 ============================================================================== --- head/share/man/man9/pfil.9 Sun Sep 16 12:08:06 2012 (r240560) +++ head/share/man/man9/pfil.9 Sun Sep 16 13:13:02 2012 (r240561) @@ -28,7 +28,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 29, 2004 +.Dd September 16, 2012 .Dt PFIL 9 .Os .Sh NAME @@ -122,6 +122,18 @@ The filter returns an error (errno) if t if the processing is to continue. If the packet processing is to stop, it is the responsibility of the filter to free the packet. +.Sh FILTERING POINTS +Currently, filtering points are implemented for the following link types: +.Pp +.Bl -tag -width "AF_INET6" -offset XXX -compact +.It AF_INET +.It AF_INET6 +IPv4 and IPv6 packets. Note that packet header is already +.Cm converted to host format. +Host format has to be preserved in case of header modifications. +.It AF_LINK +Link-layer packets. +.El .Sh RETURN VALUES If successful, .Fn pfil_head_get @@ -187,23 +199,6 @@ The function is only safe for internal use. .Pp -.Fx -implements only hooks for -.Dv AF_INET -and -.Dv AF_INET6 . -Packets diverted through these hooks have data in -host byte order contrary to the above statements. -.Pp -The -.Xr if_bridge 4 -diverts -.Dv AF_INET -and -.Dv AF_INET6 -traffic according to its sysctl settings, but contrary to the above -statements, the data is provided in host byte order. -.Pp When a .Vt pfil_head is being modified, no traffic is diverted
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