PCAP_SETFILTER(3PCAP) PCAP_SETFILTER(3PCAP)

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)