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.TH PCAP_OFFLINE_FILTER 3PCAP "7 April 2014"
.SH NAME
pcap_offline_filter \- check whether a filter matches a packet
.SH SYNOPSIS
.nf
.ft B
#include <pcap/pcap.h>
.ft
.LP
.ft B
int pcap_offline_filter(const struct bpf_program *fp,
.ti +8
const struct pcap_pkthdr *h, const u_char *pkt)
.ft
.fi
.SH DESCRIPTION
.BR pcap_offline_filter ()
checks whether a filter matches a packet.
.I fp
is a pointer to a
.I bpf_program
struct, usually the result of a call to
.BR pcap_compile (3PCAP).
.I h
points to the
.I pcap_pkthdr
structure for the packet, and
.I pkt
points to the data in the packet.
.SH RETURN VALUE
.BR pcap_offline_filter ()
returns the return value of the filter program.  This will be zero if
the packet doesn't match the filter and non-zero if the packet matches
the filter.
.SH SEE ALSO
.BR pcap (3PCAP)