mirror of
https://github.com/nmap/nmap.git
synced 2026-01-05 22:19:03 +00:00
Upgrade libpcap to version 1.0.0.
This commit is contained in:
david
156
libpcap/pcap_findalldevs.3pcap
Normal file
156
libpcap/pcap_findalldevs.3pcap
Normal file
@@ -0,0 +1,156 @@
|
||||
.\" @(#) $Header: /tcpdump/master/libpcap/pcap_findalldevs.3pcap,v 1.1.2.3 2008-04-06 03:21:55 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_FINDALLDEVS 3PCAP "5 April 2008"
|
||||
.SH NAME
|
||||
pcap_findalldevs \- get a list of capture devices
|
||||
.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_findalldevs(pcap_if_t **alldevsp, char *errbuf);
|
||||
.ft
|
||||
.fi
|
||||
.SH DESCRIPTION
|
||||
.B pcap_findalldevs()
|
||||
constructs a list of network devices that can be opened with
|
||||
.B pcap_create()
|
||||
and
|
||||
.B pcap_activate()
|
||||
or with
|
||||
.BR pcap_open_live() .
|
||||
(Note that there may be network devices that cannot be opened by the
|
||||
process calling
|
||||
.BR pcap_findalldevs() ,
|
||||
because, for example, that process might not have sufficient privileges
|
||||
to open them for capturing; if so, those devices will not appear on the
|
||||
list.)
|
||||
.I alldevsp
|
||||
is set to point to the first element of the list; each element of the
|
||||
list is of type
|
||||
.BR pcap_if_t ,
|
||||
and has the following members:
|
||||
.RS
|
||||
.TP
|
||||
.B next
|
||||
if not
|
||||
.BR NULL ,
|
||||
a pointer to the next element in the list;
|
||||
.B NULL
|
||||
for the last element of the list
|
||||
.TP
|
||||
.B name
|
||||
a pointer to a string giving a name for the device to pass to
|
||||
.B pcap_open_live()
|
||||
.TP
|
||||
.B description
|
||||
if not
|
||||
.BR NULL ,
|
||||
a pointer to a string giving a human-readable description of the device
|
||||
.TP
|
||||
.B addresses
|
||||
a pointer to the first element of a list of addresses for the interface
|
||||
.TP
|
||||
.B flags
|
||||
interface flags:
|
||||
.RS
|
||||
.TP
|
||||
.B PCAP_IF_LOOPBACK
|
||||
set if the interface is a loopback interface
|
||||
.RE
|
||||
.RE
|
||||
.PP
|
||||
Each element of the list of addresses is of type
|
||||
.BR pcap_addr_t ,
|
||||
and has the following members:
|
||||
.RS
|
||||
.TP
|
||||
.B next
|
||||
if not
|
||||
.BR NULL ,
|
||||
a pointer to the next element in the list;
|
||||
.B NULL
|
||||
for the last element of the list
|
||||
.TP
|
||||
.B addr
|
||||
a pointer to a
|
||||
.B "struct sockaddr"
|
||||
containing an address
|
||||
.TP
|
||||
.B netmask
|
||||
if not
|
||||
.BR NULL ,
|
||||
a pointer to a
|
||||
.B "struct sockaddr"
|
||||
that contains the netmask corresponding to the address pointed to by
|
||||
.B addr
|
||||
.TP
|
||||
.B broadaddr
|
||||
if not
|
||||
.BR NULL ,
|
||||
a pointer to a
|
||||
.B "struct sockaddr"
|
||||
that contains the broadcast address corresponding to the address pointed
|
||||
to by
|
||||
.BR addr ;
|
||||
may be null if the interface doesn't support broadcasts
|
||||
.TP
|
||||
.B dstaddr
|
||||
if not
|
||||
.BR NULL ,
|
||||
a pointer to a
|
||||
.B "struct sockaddr"
|
||||
that contains the destination address corresponding to the address pointed
|
||||
to by
|
||||
.BR addr ;
|
||||
may be null if the interface isn't a point-to-point interface
|
||||
.RE
|
||||
.PP
|
||||
Note that not all the addresses in the list of addresses are
|
||||
necessarily IPv4 or IPv6 addresses - you must check the
|
||||
.B sa_family
|
||||
member of the
|
||||
.B "struct sockaddr"
|
||||
before interpreting the contents of the address.
|
||||
.PP
|
||||
The list of devices must be freed with
|
||||
.BR pcap_freealldevs() .
|
||||
.SH RETURN VALUE
|
||||
.B pcap_findalldevs()
|
||||
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), pcap_create(3PCAP), pcap_activate(3PCAP),
|
||||
pcap_open_live(3PCAP), pcap_freealldevs(3PCAP)
|
||||
Reference in New Issue
Block a user