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PCAP Library with DECT support
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libpcap/pcap_setfilter.3pcap

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.\" @(#) $Header: /tcpdump/master/libpcap/pcap_setfilter.3pcap,v 1.4 2008-05-13 15:19:56 guy Exp $
.\"
.\" Copyright (c) 1994, 1996, 1997
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that: (1) source code distributions
.\" retain the above copyright notice and this paragraph in its entirety, (2)
.\" distributions including binary code include the above copyright notice and
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.\" ``This product includes software developed by the University of California,
.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
.\" the University nor the names of its contributors may be used to endorse
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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.\"
.TH PCAP_SETFILTER 3PCAP "5 April 2008"
.SH NAME
pcap_setfilter \- set the filter
.SH SYNOPSIS
.nf
.ft B
#include <pcap/pcap.h>
.ft
.LP
.ft B
int pcap_setfilter(pcap_t *p, struct bpf_program *fp);
.ft
.fi
.SH DESCRIPTION
.B pcap_setfilter()
is used to specify a filter program.
.I fp
is a pointer to a
.I bpf_program
struct, usually the result of a call to
.BR pcap_compile() .
.SH RETURN VALUE
.B pcap_setfilter()
returns 0 on success and \-1 on failure.
If \-1 is returned,
.B pcap_geterr()
or
.B pcap_perror()
may be called with
.I p
as an argument to fetch or display the error text.
.SH SEE ALSO
pcap(3PCAP), pcap_compile(3PCAP), pcap_geterr(3PCAP)