Updated: 2022/Sep/29

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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_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
       display the error text.

SEE ALSO
       pcap(3)



                                 5 March 2022                PCAP_SETFILTER(3)