PCAP_SETFILTER(3)      FreeBSD 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_compile(3).

RETURN VALUE
       pcap_setfilter() returns 0 on success and PCAP_ERROR on failure. If
       PCAP_ERROR is returned, pcap_geterr(3) or pcap_perror(3) may be called
       with p as an argument to fetch or display the error text.

SEE ALSO
       pcap(3)

                                 25 July 2018                PCAP_SETFILTER(3)