![Guy Harris](/assets/img/avatar_default.png)
value for DLT_PFLOG, and that goes along with a change to the link-layer header for DLT_PFLOG - support both the old and new values and format. svn path=/trunk/; revision=7676
489 lines
17 KiB
C
489 lines
17 KiB
C
/* wtap.h
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*
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* $Id: wtap.h,v 1.137 2003/05/15 07:14:46 guy Exp $
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __WTAP_H__
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#define __WTAP_H__
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_WINSOCK2_H
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# include <winsock2.h>
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#endif
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#include <glib.h>
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#include <stdio.h>
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/* Encapsulation types. Choose names that truly reflect
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* what is contained in the packet trace file.
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*
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* WTAP_ENCAP_PER_PACKET is a value passed to "wtap_dump_open()" or
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* "wtap_dump_fd_open()" to indicate that there is no single encapsulation
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* type for all packets in the file; this may cause those routines to
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* fail if the capture file format being written can't support that.
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* It's also returned by "wtap_file_encap()" for capture files that
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* don't have a single encapsulation type for all packets in the file.
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*
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* WTAP_ENCAP_UNKNOWN is returned by "wtap_pcap_encap_to_wtap_encap()"
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* if it's handed an unknown encapsulation.
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*
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* WTAP_ENCAP_FDDI_BITSWAPPED is for FDDI captures on systems where the
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* MAC addresses you get from the hardware are bit-swapped. Ideally,
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* the driver would tell us that, but I know of none that do, so, for
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* now, we base it on the machine on which we're *reading* the
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* capture, rather than on the machine on which the capture was taken
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* (they're probably likely to be the same). We assume that they're
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* bit-swapped on everything except for systems running Ultrix, Alpha
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* systems, and BSD/OS systems (that's what "tcpdump" does; I guess
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* Digital decided to bit-swap addresses in the hardware or in the
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* driver, and I guess BSDI bit-swapped them in the driver, given that
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* BSD/OS generally runs on Boring Old PC's). If we create a wiretap
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* save file format, we'd use the WTAP_ENCAP values to flag the
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* encapsulation of a packet, so there we'd at least be able to base
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* it on the machine on which the capture was taken.
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*
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* WTAP_ENCAP_LINUX_ATM_CLIP is the encapsulation you get with the
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* ATM on Linux code from <http://linux-atm.sourceforge.net/>;
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* that code adds a DLT_ATM_CLIP DLT_ code of 19, and that
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* encapsulation isn't the same as the DLT_ATM_RFC1483 encapsulation
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* presumably used on some BSD systems, which we turn into
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* WTAP_ENCAP_ATM_RFC1483.
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*
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* WTAP_ENCAP_NULL corresponds to DLT_NULL from "libpcap". This
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* corresponds to
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*
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* 1) PPP-over-HDLC encapsulation, at least with some versions
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* of ISDN4BSD (but not the current ones, it appears, unless
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* I've missed something);
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*
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* 2) a 4-byte header containing the AF_ address family, in
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* the byte order of the machine that saved the capture,
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* for the packet, as used on many BSD systems for the
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* loopback device and some other devices, or a 4-byte header
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* containing the AF_ address family in network byte order,
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* as used on recent OpenBSD systems for the loopback device;
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*
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* 3) a 4-byte header containing 2 octets of 0 and an Ethernet
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* type in the byte order from an Ethernet header, that being
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* what older versions of "libpcap" on Linux turn the Ethernet
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* header for loopback interfaces into (0.6.0 and later versions
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* leave the Ethernet header alone and make it DLT_EN10MB). */
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#define WTAP_ENCAP_PER_PACKET -1
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#define WTAP_ENCAP_UNKNOWN 0
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#define WTAP_ENCAP_ETHERNET 1
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#define WTAP_ENCAP_TOKEN_RING 2
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#define WTAP_ENCAP_SLIP 3
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#define WTAP_ENCAP_PPP 4
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#define WTAP_ENCAP_FDDI 5
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#define WTAP_ENCAP_FDDI_BITSWAPPED 6
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#define WTAP_ENCAP_RAW_IP 7
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#define WTAP_ENCAP_ARCNET 8
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#define WTAP_ENCAP_ARCNET_LINUX 9
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#define WTAP_ENCAP_ATM_RFC1483 10
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#define WTAP_ENCAP_LINUX_ATM_CLIP 11
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#define WTAP_ENCAP_LAPB 12
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#define WTAP_ENCAP_ATM_PDUS 13
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#define WTAP_ENCAP_ATM_PDUS_UNTRUNCATED 14
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#define WTAP_ENCAP_NULL 15
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#define WTAP_ENCAP_ASCEND 16
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#define WTAP_ENCAP_ISDN 17
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#define WTAP_ENCAP_IP_OVER_FC 18
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#define WTAP_ENCAP_PPP_WITH_PHDR 19
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#define WTAP_ENCAP_IEEE_802_11 20
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#define WTAP_ENCAP_IEEE_802_11_WITH_RADIO 21
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#define WTAP_ENCAP_SLL 22
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#define WTAP_ENCAP_FRELAY 23
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#define WTAP_ENCAP_FRELAY_WITH_PHDR 24
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#define WTAP_ENCAP_CHDLC 25
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#define WTAP_ENCAP_CISCO_IOS 26
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#define WTAP_ENCAP_LOCALTALK 27
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#define WTAP_ENCAP_PRISM_HEADER 28
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#define WTAP_ENCAP_OLD_PFLOG 29
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#define WTAP_ENCAP_HHDLC 30
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#define WTAP_ENCAP_DOCSIS 31
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#define WTAP_ENCAP_COSINE 32
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#define WTAP_ENCAP_WLAN_HEADER 33
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#define WTAP_ENCAP_WFLEET_HDLC 34
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#define WTAP_ENCAP_SDLC 35
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#define WTAP_ENCAP_TZSP 36
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#define WTAP_ENCAP_ENC 37
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#define WTAP_ENCAP_PFLOG 38
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/* last WTAP_ENCAP_ value + 1 */
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#define WTAP_NUM_ENCAP_TYPES 39
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/* File types that can be read by wiretap.
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We support writing some many of these file types, too, so we
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distinguish between different versions of them. */
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#define WTAP_FILE_UNKNOWN 0
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#define WTAP_FILE_WTAP 1
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#define WTAP_FILE_PCAP 2
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#define WTAP_FILE_PCAP_SS990417 3
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#define WTAP_FILE_PCAP_SS990915 4
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#define WTAP_FILE_PCAP_SS991029 5
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#define WTAP_FILE_PCAP_NOKIA 6
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#define WTAP_FILE_PCAP_AIX 7
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#define WTAP_FILE_LANALYZER 8
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#define WTAP_FILE_NGSNIFFER_UNCOMPRESSED 9
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#define WTAP_FILE_NGSNIFFER_COMPRESSED 10
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#define WTAP_FILE_SNOOP 11
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#define WTAP_FILE_SHOMITI 12
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#define WTAP_FILE_IPTRACE_1_0 13
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#define WTAP_FILE_IPTRACE_2_0 14
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#define WTAP_FILE_NETMON_1_x 15
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#define WTAP_FILE_NETMON_2_x 16
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#define WTAP_FILE_NETXRAY_OLD 17
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#define WTAP_FILE_NETXRAY_1_0 18
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#define WTAP_FILE_NETXRAY_1_1 19
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#define WTAP_FILE_NETXRAY_2_00x 20
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#define WTAP_FILE_RADCOM 21
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#define WTAP_FILE_ASCEND 22
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#define WTAP_FILE_NETTL 23
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#define WTAP_FILE_TOSHIBA 24
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#define WTAP_FILE_I4BTRACE 25
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#define WTAP_FILE_CSIDS 26
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#define WTAP_FILE_PPPDUMP 27
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#define WTAP_FILE_ETHERPEEK_V56 28
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#define WTAP_FILE_ETHERPEEK_V7 29
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#define WTAP_FILE_VMS 30
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#define WTAP_FILE_DBS_ETHERWATCH 31
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#define WTAP_FILE_VISUAL_NETWORKS 32
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#define WTAP_FILE_COSINE 33
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/* last WTAP_FILE_ value + 1 */
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#define WTAP_NUM_FILE_TYPES 34
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/*
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* Maximum packet size we'll support.
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*/
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#define WTAP_MAX_PACKET_SIZE 65535
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/*
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* "Pseudo-headers" are used to supply to the clients of wiretap
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* per-packet information that's not part of the packet payload
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* proper.
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*
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* NOTE: do not use pseudo-header structures to hold information
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* used by the code to read a particular capture file type; to
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* keep that sort of state information, add a new structure for
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* that private information to "wtap-int.h", add a pointer to that
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* type of structure to the "capture" member of the "struct wtap"
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* structure, and allocate one of those structures and set that member
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* in the "open" routine for that capture file type if the open
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* succeeds. See various other capture file type handlers for examples
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* of that.
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*/
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/* Packet "pseudo-header" information for X.25 capture files. */
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#define FROM_DCE 0x80
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struct x25_phdr {
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guint8 flags; /* ENCAP_LAPB, ENCAP_V120 : 1st bit means From DCE */
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};
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/* Packet "pseudo-header" information for ISDN capture files. */
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/* Direction */
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struct isdn_phdr {
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gboolean uton;
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guint8 channel; /* 0 = D-channel; n = B-channel n */
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};
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/* Packet "pseudo-header" for ATM capture files.
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Not all of this information is supplied by all capture types. */
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/*
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* Status bits.
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*/
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#define ATM_RAW_CELL 0x01 /* TRUE if the packet is a single cell */
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/*
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* AAL types.
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*/
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#define AAL_UNKNOWN 0 /* AAL unknown */
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#define AAL_1 1 /* AAL1 */
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#define AAL_2 2 /* AAL2 */
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#define AAL_3_4 3 /* AAL3/4 */
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#define AAL_5 4 /* AAL5 */
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#define AAL_USER 5 /* User AAL */
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#define AAL_SIGNALLING 6 /* Signaling AAL */
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#define AAL_OAMCELL 7 /* OAM cell */
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/*
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* Traffic types.
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*/
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#define TRAF_UNKNOWN 0 /* Unknown */
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#define TRAF_LLCMX 1 /* LLC multiplexed (RFC 1483) */
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#define TRAF_VCMX 2 /* VC multiplexed (RFC 1483) */
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#define TRAF_LANE 3 /* LAN Emulation */
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#define TRAF_ILMI 4 /* ILMI */
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#define TRAF_FR 5 /* Frame Relay */
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#define TRAF_SPANS 6 /* FORE SPANS */
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#define TRAF_IPSILON 7 /* Ipsilon */
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/*
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* Traffic subtypes.
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*/
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#define TRAF_ST_UNKNOWN 0 /* Unknown */
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/*
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* For TRAF_VCMX:
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*/
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#define TRAF_ST_VCMX_802_3_FCS 1 /* 802.3 with an FCS */
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#define TRAF_ST_VCMX_802_4_FCS 2 /* 802.4 with an FCS */
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#define TRAF_ST_VCMX_802_5_FCS 3 /* 802.5 with an FCS */
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#define TRAF_ST_VCMX_FDDI_FCS 4 /* FDDI with an FCS */
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#define TRAF_ST_VCMX_802_6_FCS 5 /* 802.6 with an FCS */
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#define TRAF_ST_VCMX_802_3 7 /* 802.3 without an FCS */
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#define TRAF_ST_VCMX_802_4 8 /* 802.4 without an FCS */
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#define TRAF_ST_VCMX_802_5 9 /* 802.5 without an FCS */
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#define TRAF_ST_VCMX_FDDI 10 /* FDDI without an FCS */
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#define TRAF_ST_VCMX_802_6 11 /* 802.6 without an FCS */
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#define TRAF_ST_VCMX_FRAGMENTS 12 /* Fragments */
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#define TRAF_ST_VCMX_BPDU 13 /* BPDU */
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/*
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* For TRAF_LANE:
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*/
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#define TRAF_ST_LANE_LE_CTRL 1 /* LANE: LE Ctrl */
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#define TRAF_ST_LANE_802_3 2 /* LANE: 802.3 */
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#define TRAF_ST_LANE_802_5 3 /* LANE: 802.5 */
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#define TRAF_ST_LANE_802_3_MC 4 /* LANE: 802.3 multicast */
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#define TRAF_ST_LANE_802_5_MC 5 /* LANE: 802.5 multicast */
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/*
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* For TRAF_IPSILON:
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*/
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#define TRAF_ST_IPSILON_FT0 1 /* Ipsilon: Flow Type 0 */
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#define TRAF_ST_IPSILON_FT1 2 /* Ipsilon: Flow Type 1 */
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#define TRAF_ST_IPSILON_FT2 3 /* Ipsilon: Flow Type 2 */
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struct atm_phdr {
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guint32 flags; /* status flags */
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guint8 aal; /* AAL of the traffic */
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guint8 type; /* traffic type */
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guint8 subtype; /* traffic subtype */
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guint16 vpi; /* virtual path identifier */
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guint16 vci; /* virtual circuit identifier */
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guint16 channel; /* link: 0 for DTE->DCE, 1 for DCE->DTE */
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guint16 cells; /* number of cells */
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guint16 aal5t_u2u; /* user-to-user indicator */
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guint16 aal5t_len; /* length of the packet */
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guint32 aal5t_chksum; /* checksum for AAL5 packet */
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};
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/* Packet "pseudo-header" for the output from "wandsession", "wannext",
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"wandisplay", and similar commands on Lucent/Ascend access equipment. */
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#define ASCEND_MAX_STR_LEN 64
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#define ASCEND_PFX_WDS_X 1
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#define ASCEND_PFX_WDS_R 2
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#define ASCEND_PFX_WDD 3
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struct ascend_phdr {
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guint16 type; /* ASCEND_PFX_*, as defined above */
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char user[ASCEND_MAX_STR_LEN]; /* Username, from wandsession header */
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guint32 sess; /* Session number, from wandsession header */
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char call_num[ASCEND_MAX_STR_LEN]; /* Called number, from WDD header */
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guint32 chunk; /* Chunk number, from WDD header */
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guint32 task; /* Task number */
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};
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/* Packet "pseudo-header" for point-to-point links with direction flags. */
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struct p2p_phdr {
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gboolean sent; /* TRUE=sent, FALSE=received */
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};
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/* Packet "pseudo-header" information for 802.11 with radio information. */
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struct ieee_802_11_phdr {
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guint8 channel; /* Channel number */
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guint8 data_rate; /* in .5 Mb/s units */
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guint8 signal_level; /* percentage */
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};
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/* Packet "pseudo-header" for the output from CoSine L2 debug output. */
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#define COSINE_MAX_IF_NAME_LEN 128
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#define COSINE_ENCAP_TEST 1
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#define COSINE_ENCAP_PPoATM 2
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#define COSINE_ENCAP_PPoFR 3
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#define COSINE_ENCAP_ATM 4
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#define COSINE_ENCAP_FR 5
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#define COSINE_ENCAP_HDLC 6
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#define COSINE_ENCAP_PPP 7
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#define COSINE_ENCAP_ETH 8
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#define COSINE_ENCAP_UNKNOWN 99
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#define COSINE_DIR_TX 1
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#define COSINE_DIR_RX 2
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struct cosine_phdr {
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guint8 encap; /* COSINE_ENCAP_* as defined above */
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guint8 direction; /* COSINE_DIR_*, as defined above */
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char if_name[COSINE_MAX_IF_NAME_LEN]; /* Encap & Logical I/F name */
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guint16 pro; /* Protocol */
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guint16 off; /* Offset */
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guint16 pri; /* Priority */
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guint16 rm; /* Rate Marking */
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guint16 err; /* Error Code */
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};
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union wtap_pseudo_header {
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struct x25_phdr x25;
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struct isdn_phdr isdn;
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struct atm_phdr atm;
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struct ascend_phdr ascend;
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struct p2p_phdr p2p;
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struct ieee_802_11_phdr ieee_802_11;
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struct cosine_phdr cosine;
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};
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struct wtap_pkthdr {
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struct timeval ts;
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guint32 caplen;
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guint32 len;
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int pkt_encap;
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};
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typedef void (*wtap_handler)(guchar*, const struct wtap_pkthdr*,
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long, union wtap_pseudo_header *pseudo_header, const guchar *);
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struct wtap;
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struct Buffer;
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struct wtap_dumper;
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typedef struct wtap wtap;
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typedef struct wtap_dumper wtap_dumper;
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/*
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* On failure, "wtap_open_offline()" returns NULL, and puts into the
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* "int" pointed to by its second argument:
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*
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* a positive "errno" value if the capture file can't be opened;
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*
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* a negative number, indicating the type of error, on other failures.
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*/
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struct wtap* wtap_open_offline(const char *filename, int *err, gboolean do_random);
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/* Returns TRUE if entire loop-reading was successful. If read failure
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* happened, FALSE is returned and err is set. */
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gboolean wtap_loop(wtap *wth, int, wtap_handler, guchar*, int *err);
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/* Returns TRUE if read was successful. FALSE if failure. data_offset is
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* set the the offset in the file where the data for the read packet is
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* located. */
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gboolean wtap_read(wtap *wth, int *err, long *data_offset);
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struct wtap_pkthdr *wtap_phdr(wtap *wth);
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union wtap_pseudo_header *wtap_pseudoheader(wtap *wth);
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guint8 *wtap_buf_ptr(wtap *wth);
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int wtap_fd(wtap *wth);
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int wtap_snapshot_length(wtap *wth); /* per file */
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int wtap_file_type(wtap *wth);
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int wtap_file_encap(wtap *wth);
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const char *wtap_file_type_string(int filetype);
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const char *wtap_file_type_short_string(int filetype);
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int wtap_short_string_to_file_type(const char *short_name);
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const char *wtap_encap_string(int encap);
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const char *wtap_encap_short_string(int encap);
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int wtap_short_string_to_encap(const char *short_name);
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const char *wtap_strerror(int err);
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void wtap_sequential_close(wtap *wth);
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void wtap_close(wtap *wth);
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gboolean wtap_seek_read (wtap *wth, long seek_off,
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union wtap_pseudo_header *pseudo_header, guint8 *pd, int len, int *err);
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gboolean wtap_def_seek_read (wtap *wth, long seek_off,
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union wtap_pseudo_header *pseudo_header, guint8 *pd, int len, int *err);
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gboolean wtap_dump_can_open(int filetype);
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gboolean wtap_dump_can_write_encap(int filetype, int encap);
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wtap_dumper* wtap_dump_open(const char *filename, int filetype, int encap,
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int snaplen, int *err);
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wtap_dumper* wtap_dump_fdopen(int fd, int filetype, int encap, int snaplen,
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int *err);
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gboolean wtap_dump(wtap_dumper *, const struct wtap_pkthdr *,
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const union wtap_pseudo_header *pseudo_header, const guchar *, int *err);
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FILE* wtap_dump_file(wtap_dumper *);
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gboolean wtap_dump_close(wtap_dumper *, int *);
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long wtap_get_bytes_dumped(wtap_dumper *);
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void wtap_set_bytes_dumped(wtap_dumper *wdh, long bytes_dumped);
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/*
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* Wiretap error codes.
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*/
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#define WTAP_ERR_NOT_REGULAR_FILE -1
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/* The file being opened for reading isn't a plain file (or pipe) */
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#define WTAP_ERR_RANDOM_OPEN_PIPE -2
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/* The file is being opened for random access and it's a pipe */
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#define WTAP_ERR_FILE_UNKNOWN_FORMAT -3
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/* The file being opened is not a capture file in a known format */
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#define WTAP_ERR_UNSUPPORTED -4
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/* Supported file type, but there's something in the file we
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can't support */
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#define WTAP_ERR_CANT_WRITE_TO_PIPE -5
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/* Wiretap can't save to a pipe in the specified format */
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#define WTAP_ERR_CANT_OPEN -6
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/* The file couldn't be opened, reason unknown */
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#define WTAP_ERR_UNSUPPORTED_FILE_TYPE -7
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/* Wiretap can't save files in the specified format */
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#define WTAP_ERR_UNSUPPORTED_ENCAP -8
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/* Wiretap can't read or save files in the specified format with the
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specified encapsulation */
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#define WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED -9
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/* The specified format doesn't support per-packet encapsulations */
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#define WTAP_ERR_CANT_CLOSE -10
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/* The file couldn't be closed, reason unknown */
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#define WTAP_ERR_CANT_READ -11
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/* An attempt to read failed, reason unknown */
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#define WTAP_ERR_SHORT_READ -12
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/* An attempt to read read less data than it should have */
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#define WTAP_ERR_BAD_RECORD -13
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/* We read an invalid record */
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#define WTAP_ERR_SHORT_WRITE -14
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/* An attempt to write wrote less data than it should have */
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#define WTAP_ERR_UNC_TRUNCATED -15
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/* Sniffer compressed data was oddly truncated */
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#define WTAP_ERR_UNC_OVERFLOW -16
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/* Uncompressing Sniffer data would overflow buffer */
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#define WTAP_ERR_UNC_BAD_OFFSET -17
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/* LZ77 compressed data has bad offset to string */
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/* Errors from zlib; zlib error Z_xxx turns into Wiretap error
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WTAP_ERR_ZLIB + Z_xxx.
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WTAP_ERR_ZLIB_MIN and WTAP_ERR_ZLIB_MAX bound the range of zlib
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errors; we leave room for 100 positive and 100 negative error
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codes. */
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#define WTAP_ERR_ZLIB -200
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#define WTAP_ERR_ZLIB_MAX -100
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#define WTAP_ERR_ZLIB_MIN -300
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#endif /* __WTAP_H__ */
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