pcap_setfilter(3PCAP) man page
Updated: 5 March 2022 • View in plain text •
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This man page documents libpcap version 1.11.0-PRE-GIT (see also: 1.10.4, 1.10.2, 1.10.1, 1.10.0, 1.9.1, 1.8.1, 1.7.4, 1.6.2, 1.5.3).
Your system may have a different version installed, possibly with some local modifications. To achieve the best results, please make sure this version of this man page suits your needs. If necessary, try to look for a different version on this web site or in the man pages available in your installation.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
COLOPHON
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