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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

.B 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

.B 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

pcap(3PCAP)