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author | rpaulo <rpaulo@FreeBSD.org> | 2009-03-21 22:58:08 +0000 |
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committer | rpaulo <rpaulo@FreeBSD.org> | 2009-03-21 22:58:08 +0000 |
commit | 3f19af99adb541ff811a6faaaae340e24ad313c5 (patch) | |
tree | 41d4ee124e8dc2938aa5559c6f422a7b778c807f /contrib/libpcap/pcap_findalldevs.3pcap | |
parent | b0069d00e9ca6c9d90eb18267d0949527c0249e5 (diff) | |
parent | d8d18f6fbdf4f16ae4382f3d0a2d97953edd9b2c (diff) | |
download | FreeBSD-src-3f19af99adb541ff811a6faaaae340e24ad313c5.zip FreeBSD-src-3f19af99adb541ff811a6faaaae340e24ad313c5.tar.gz |
Merge libpcap 1.0.0.
Diffstat (limited to 'contrib/libpcap/pcap_findalldevs.3pcap')
-rw-r--r-- | contrib/libpcap/pcap_findalldevs.3pcap | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/contrib/libpcap/pcap_findalldevs.3pcap b/contrib/libpcap/pcap_findalldevs.3pcap new file mode 100644 index 0000000..93c0455 --- /dev/null +++ b/contrib/libpcap/pcap_findalldevs.3pcap @@ -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) |