pcap_lookupnet(3PCAP) man page
Updated: 25 July 2018 • 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).
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pcap_lookupnet - find the IPv4 network number and netmask for a device
SYNOPSIS
#include <pcap/pcap.h> char errbuf[PCAP_ERRBUF_SIZE]; int pcap_lookupnet(const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp, char *errbuf);
DESCRIPTION
pcap_lookupnet()
is used to determine the IPv4 network number and mask
associated with the network device
device.
Both
netp
and
maskp
are
bpf_u_int32
pointers.
RETURN VALUE
pcap_lookupnet()
returns
0
on success and
PCAP_ERROR
on failure. If
PCAP_ERROR
is returned,
errbuf
is filled in with an appropriate error message.
errbuf
is assumed to be able to hold at least
PCAP_ERRBUF_SIZE
chars.
SEE ALSO
COLOPHON
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