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Document the use of pseudo_AF_HDRCMPLT with BPF.

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Mike Smith 1999-10-15 05:07:26 +00:00
parent 114ae644b5
commit caa4ea97c1
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8
share/man/man4/bpf.4
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@ -276,6 +276,14 @@ An incompatible filter
may result in undefined behavior (most likely, an error returned by
.Fn ioctl
or haphazard packet matching).
.It Dv BIOCSHDRCMPLT
.It Dv BIOCGHDRCMPLT
.Pq Li u_int
Set or get the status of the ``header complete'' flag.
Set to zero if the link level source address should be filled in automatically
by the the interface output routine. Set to one if the link level source
address will be written, as provided, to the wire. This flag is initialized
to zero by default.
.Sh BPF HEADER
The following structure is prepended to each packet returned by
.Xr read 2 :