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)