66 lines
2.0 KiB
Plaintext
66 lines
2.0 KiB
Plaintext
.\" @(#) $Header: /tcpdump/master/libpcap/pcap_lookupnet.3pcap,v 1.3 2008-04-06 02:53:22 guy Exp $
|
|
.\"
|
|
.\" Copyright (c) 1994, 1996, 1997
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that: (1) source code distributions
|
|
.\" retain the above copyright notice and this paragraph in its entirety, (2)
|
|
.\" distributions including binary code include the above copyright notice and
|
|
.\" this paragraph in its entirety in the documentation or other materials
|
|
.\" provided with the distribution, and (3) all advertising materials mentioning
|
|
.\" features or use of this software display the following acknowledgement:
|
|
.\" ``This product includes software developed by the University of California,
|
|
.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
.\" the University nor the names of its contributors may be used to endorse
|
|
.\" or promote products derived from this software without specific prior
|
|
.\" written permission.
|
|
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
.\"
|
|
.TH PCAP_LOOKUPNET 3PCAP "5 April 2008"
|
|
.SH NAME
|
|
pcap_lookupnet \- find the IPv4 network number and netmask for a device
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.ft B
|
|
#include <pcap/pcap.h>
|
|
.ft
|
|
.LP
|
|
.nf
|
|
.ft B
|
|
char errbuf[PCAP_ERRBUF_SIZE];
|
|
.ft
|
|
.LP
|
|
.ft B
|
|
int pcap_lookupnet(const char *device, bpf_u_int32 *netp,
|
|
.ti +8
|
|
bpf_u_int32 *maskp, char *errbuf);
|
|
.ft
|
|
.fi
|
|
.SH DESCRIPTION
|
|
.B pcap_lookupnet()
|
|
is used to determine the IPv4 network number and mask
|
|
associated with the network device
|
|
.IR device .
|
|
Both
|
|
.I netp
|
|
and
|
|
.I maskp
|
|
are
|
|
.I bpf_u_int32
|
|
pointers.
|
|
.SH RETURN VALUE
|
|
.B pcap_lookupnet()
|
|
returns 0 on success and \-1 on failure.
|
|
If \-1 is returned,
|
|
.I errbuf
|
|
is filled in with an appropriate error message.
|
|
.I errbuf
|
|
is assumed to be able to hold at least
|
|
.B PCAP_ERRBUF_SIZE
|
|
chars.
|
|
.SH SEE ALSO
|
|
pcap(3PCAP)
|