PCAP_LOOKUPNET
Section: Misc. Reference Manual Pages (3PCAP)
Updated: 3 January 2014
Page Index
NAME
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 -1 on failure.
If -1 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
pcap(3PCAP)