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(3PCAP).

RETURN VALUE

       pcap_setfilter() returns 0 on success, PCAP_ERROR_NOT_ACTIVATED if called on a capture  handle  that  has
       been   created   but  not  activated,  or  PCAP_ERROR  on  other  errors.   If  PCAP_ERROR  is  returned,
       pcap_geterr(3PCAP) or pcap_perror(3PCAP) may be called with p as an argument  to  fetch  or  display  the
       error text.

SEE ALSO

       pcap(3PCAP)

                                                  5 March 2022                             PCAP_SETFILTER(3PCAP)