pcap_setfilter(3) - NetBSD Manual Pages

PCAP_SETFILTER(3)                                            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,  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(3)
       or pcap_perror(3) may be called with p as an argument to fetch or  dis-
       play the error text.


SEE ALSO

       pcap(3)



                                 5 March 2022                PCAP_SETFILTER(3)