freebsd man page for pcap_setfilter

PCAP_SETFILTER(3)					     Library Functions Manual						 PCAP_SETFILTER(3)

NAME
       pcap_setfilter - set the filter

SYNOPSIS
       #include <pcap/pcap.h>

       int pcap_setfilter(pcap_t *p, struct bpf_program *fp);

DESCRIPTION
       pcap_setfilter()  is  used to specify a filter program.	fp is a pointer to a bpf_program struct, usually the result of a call to pcap_com-
       pile().

RETURN VALUE
       pcap_setfilter() returns 0 on success and -1 on failure.  If -1 is returned, pcap_geterr() or pcap_perror() may be  called  with  p  as	an
       argument to fetch or display the error text.

SEE ALSO
       pcap(3), pcap_compile(3), pcap_geterr(3)

								    13 May 2008 						 PCAP_SETFILTER(3)