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Add documentation for the BIOCLOCK and BIOCSETWF ioctl commands. Also

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modify the documentation for BIOCSETF to note that it sets the read
filter.

Pointed out by:	simon
This commit is contained in:
Christian S.J. Peron 2005-08-23 17:08:59 +00:00
parent ef8fd90476
commit 49db78b0e0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149392
1 changed files with 10 additions and 1 deletions
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11
share/man/man4/bpf.4
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@ -231,7 +231,7 @@ which must respond to messages in real time.
The default for a new file is off.
.It Dv BIOCSETF
.Pq Li "struct bpf_program"
Sets the filter program used by the kernel to discard uninteresting
Sets the read filter program used by the kernel to discard uninteresting
packets.
An array of instructions and its length is passed in using
the following structure:
@ -255,6 +255,11 @@ are performed.
See section
.Sx "FILTER MACHINE"
for an explanation of the filter language.
.It Dv BIOCSETWF
.Pq Li "struct bpf_program"
Sets the write filter program used by the kernel to control what type of
packets can be written to the interface. See the BIOCSETF command for more
information on the bpf filter program.
.It Dv BIOCVERSION
.Pq Li "struct bpf_version"
Returns the major and minor version numbers of the filter language currently
@ -301,6 +306,10 @@ Set to zero to see only incoming packets on the interface.
Set to one to see packets originating locally and remotely on the interface.
This flag is initialized to one by
default.
.It Dv BIOCLOCK
Set the locked flag on the bpf descriptor. This prevents the execution of
ioctl commands which could change the underlying operating parameters of
the device.
.El
.Sh BPF HEADER
The following structure is prepended to each packet returned by