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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, 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)