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)