6d6affd859
The encap_table_base in wcap.c is missing an entry. This causes e.g. "dumpcap -i usb3 -L" to output: Data link types (use option -y to set): USB_LINUX (MPEG) svn path=/trunk/; revision=22292
624 lines
14 KiB
C
624 lines
14 KiB
C
/* wtap.c
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*
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* $Id$
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <errno.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "wtap-int.h"
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#include "wtap.h"
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#include "file_wrappers.h"
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#include "file_util.h"
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#include "buffer.h"
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/*
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* Return the size of the file, as reported by the OS.
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* (gint64, in case that's 64 bits.)
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*/
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gint64
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wtap_file_size(wtap *wth, int *err)
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{
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struct stat statb;
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if (fstat(wth->fd, &statb) == -1) {
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if (err != NULL)
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*err = errno;
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return -1;
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}
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return statb.st_size;
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}
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int
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wtap_file_type(wtap *wth)
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{
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return wth->file_type;
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}
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int
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wtap_snapshot_length(wtap *wth)
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{
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return wth->snapshot_length;
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}
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int
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wtap_file_encap(wtap *wth)
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{
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return wth->file_encap;
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}
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int
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wtap_file_tsprecision(wtap *wth)
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{
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return wth->tsprecision;
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}
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/* Table of the encapsulation types we know about. */
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struct encap_type_info {
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const char *name;
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const char *short_name;
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};
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static struct encap_type_info encap_table_base[] = {
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/* WTAP_ENCAP_UNKNOWN */
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{ "Unknown", NULL },
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/* WTAP_ENCAP_ETHERNET */
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{ "Ethernet", "ether" },
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/* WTAP_ENCAP_TOKEN_RING */
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{ "Token Ring", "tr" },
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/* WTAP_ENCAP_SLIP */
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{ "SLIP", "slip" },
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/* WTAP_ENCAP_PPP */
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{ "PPP", "ppp" },
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/* WTAP_ENCAP_FDDI */
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{ "FDDI", "fddi" },
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/* WTAP_ENCAP_FDDI_BITSWAPPED */
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{ "FDDI with bit-swapped MAC addresses", "fddi-swapped" },
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/* WTAP_ENCAP_RAW_IP */
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{ "Raw IP", "rawip" },
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/* WTAP_ENCAP_ARCNET */
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{ "ARCNET", "arcnet" },
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/* WTAP_ENCAP_ARCNET_LINUX */
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{ "Linux ARCNET", "arcnet_linux" },
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/* WTAP_ENCAP_ATM_RFC1483 */
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{ "RFC 1483 ATM", "atm-rfc1483" },
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/* WTAP_ENCAP_LINUX_ATM_CLIP */
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{ "Linux ATM CLIP", "linux-atm-clip" },
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/* WTAP_ENCAP_LAPB */
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{ "LAPB", "lapb" },
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/* WTAP_ENCAP_ATM_PDUS */
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{ "ATM PDUs", "atm-pdus" },
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/* WTAP_ENCAP_ATM_PDUS_UNTRUNCATED */
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{ "ATM PDUs - untruncated", "atm-pdus-untruncated" },
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/* WTAP_ENCAP_NULL */
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{ "NULL", "null" },
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/* WTAP_ENCAP_ASCEND */
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{ "Lucent/Ascend access equipment", "ascend" },
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/* WTAP_ENCAP_ISDN */
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{ "ISDN", "isdn" },
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/* WTAP_ENCAP_IP_OVER_FC */
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{ "RFC 2625 IP-over-Fibre Channel", "ip-over-fc" },
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/* WTAP_ENCAP_PPP_WITH_PHDR */
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{ "PPP with Directional Info", "ppp-with-direction" },
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/* WTAP_ENCAP_IEEE_802_11 */
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{ "IEEE 802.11 Wireless LAN", "ieee-802-11" },
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/* WTAP_ENCAP_PRISM_HEADER */
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{ "IEEE 802.11 plus Prism II monitor mode header", "prism" },
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/* WTAP_ENCAP_IEEE_802_11_WITH_RADIO */
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{ "IEEE 802.11 Wireless LAN with radio information", "ieee-802-11-radio" },
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/* WTAP_ENCAP_IEEE_802_11_WLAN_RADIOTAP */
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{ "IEEE 802.11 plus radiotap WLAN header", "ieee-802-11-radiotap" },
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/* WTAP_ENCAP_IEEE_802_11_WLAN_AVS */
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{ "IEEE 802.11 plus AVS WLAN header", "ieee-802-11-avs" },
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/* WTAP_ENCAP_SLL */
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{ "Linux cooked-mode capture", "linux-sll" },
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/* WTAP_ENCAP_FRELAY */
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{ "Frame Relay", "frelay" },
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/* WTAP_ENCAP_FRELAY_WITH_PHDR */
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{ "Frame Relay with Directional Info", "frelay-with-direction" },
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/* WTAP_ENCAP_CHDLC */
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{ "Cisco HDLC", "chdlc" },
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/* WTAP_ENCAP_CISCO_IOS */
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{ "Cisco IOS internal", "ios" },
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/* WTAP_ENCAP_LOCALTALK */
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{ "Localtalk", "ltalk" },
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/* WTAP_ENCAP_OLD_PFLOG */
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{ "OpenBSD PF Firewall logs, pre-3.4", "pflog-old" },
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/* WTAP_ENCAP_HHDLC */
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{ "HiPath HDLC", "hhdlc" },
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/* WTAP_ENCAP_DOCSIS */
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{ "Data Over Cable Service Interface Specification", "docsis" },
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/* WTAP_ENCAP_COSINE */
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{ "CoSine L2 debug log", "cosine" },
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/* WTAP_ENCAP_WFLEET_HDLC */
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{ "Wellfleet HDLC", "whdlc" },
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/* WTAP_ENCAP_SDLC */
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{ "SDLC", "sdlc" },
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/* WTAP_ENCAP_TZSP */
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{ "Tazmen sniffer protocol", "tzsp" },
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/* WTAP_ENCAP_ENC */
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{ "OpenBSD enc(4) encapsulating interface", "enc" },
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/* WTAP_ENCAP_PFLOG */
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{ "OpenBSD PF Firewall logs", "pflog" },
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/* WTAP_ENCAP_CHDLC_WITH_PHDR */
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{ "Cisco HDLC with Directional Info", "chdlc-with-direction" },
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/* WTAP_ENCAP_BLUETOOTH_H4 */
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{ "Bluetooth H4", "bluetooth-h4" },
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/* WTAP_ENCAP_MTP2 */
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{ "SS7 MTP2", "mtp2" },
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/* WTAP_ENCAP_MTP3 */
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{ "SS7 MTP3", "mtp3" },
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/* WTAP_ENCAP_IRDA */
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{ "IrDA", "irda" },
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/* WTAP_ENCAP_USER0 */
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{ "USER 0", "user0" },
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/* WTAP_ENCAP_USER1 */
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{ "USER 1", "user1" },
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/* WTAP_ENCAP_USER2 */
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{ "USER 2", "user2" },
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/* WTAP_ENCAP_USER3 */
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{ "USER 3", "user3" },
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/* WTAP_ENCAP_USER4 */
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{ "USER 4", "user4" },
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/* WTAP_ENCAP_USER5 */
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{ "USER 5", "user5" },
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/* WTAP_ENCAP_USER6 */
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{ "USER 6", "user6" },
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/* WTAP_ENCAP_USER7 */
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{ "USER 7", "user7" },
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/* WTAP_ENCAP_USER8 */
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{ "USER 8", "user8" },
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/* WTAP_ENCAP_USER9 */
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{ "USER 9", "user9" },
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/* WTAP_ENCAP_USER10 */
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{ "USER 10", "user10" },
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/* WTAP_ENCAP_USER11 */
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{ "USER 11", "user11" },
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/* WTAP_ENCAP_USER12 */
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{ "USER 12", "user12" },
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/* WTAP_ENCAP_USER13 */
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{ "USER 13", "user13" },
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/* WTAP_ENCAP_USER14 */
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{ "USER 14", "user14" },
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/* WTAP_ENCAP_USER15 */
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{ "USER 15", "user15" },
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/* WTAP_ENCAP_SYMANTEC */
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{ "Symantec Enterprise Firewall", "symantec" },
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/* WTAP_ENCAP_APPLE_IP_OVER_IEEE1394 */
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{ "Apple IP-over-IEEE 1394", "ap1394" },
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/* WTAP_ENCAP_BACNET_MS_TP */
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{ "BACnet MS/TP", "bacnet-ms-tp" },
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/* WTAP_ENCAP_NETTL_RAW_ICMP */
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{ "Raw ICMP with nettl headers", "raw-icmp-nettl" },
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/* WTAP_ENCAP_NETTL_RAW_ICMPV6 */
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{ "Raw ICMPv6 with nettl headers", "raw-icmpv6-nettl" },
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/* WTAP_ENCAP_GPRS_LLC */
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{ "GPRS LLC", "gprs-llc" },
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/* WTAP_ENCAP_JUNIPER_ATM1 */
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{ "Juniper ATM1", "juniper-atm1" },
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/* WTAP_ENCAP_JUNIPER_ATM2 */
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{ "Juniper ATM2", "juniper-atm2" },
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/* WTAP_ENCAP_REDBACK */
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{ "Redback SmartEdge", "redback" },
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/* WTAP_ENCAP_NETTL_RAW_IP */
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{ "Raw IP with nettl headers", "rawip-nettl" },
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/* WTAP_ENCAP_NETTL_ETHERNET */
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{ "Ethernet with nettl headers", "ether-nettl" },
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/* WTAP_ENCAP_NETTL_TOKEN_RING */
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{ "Token Ring with nettl headers", "tr-nettl" },
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/* WTAP_ENCAP_NETTL_FDDI */
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{ "FDDI with nettl headers", "fddi-nettl" },
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/* WTAP_ENCAP_NETTL_UNKNOWN */
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{ "Unknown link-layer type with nettl headers", "unknown-nettl" },
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/* WTAP_ENCAP_MTP2_WITH_PHDR */
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{ "MTP2 with pseudoheader", "mtp2-with-phdr" },
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/* WTAP_ENCAP_JUNIPER_PPPOE */
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{ "Juniper PPPoE", "juniper-pppoe" },
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/* WTAP_ENCAP_GCOM_TIE1 */
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{ "GCOM TIE1", "gcom-tie1" },
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/* WTAP_ENCAP_GCOM_SERIAL */
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{ "GCOM Serial", "gcom-serial" },
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/* WTAP_ENCAP_NETTL_X25 */
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{ "X25 with nettl headers", "x25-nettl" },
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/* WTAP_ENCAP_K12 */
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{ "K12 protocol analyzer", "k12" },
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/* WTAP_ENCAP_JUNIPER_MLPPP */
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{ "Juniper MLPPP", "juniper-mlppp" },
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/* WTAP_ENCAP_JUNIPER_MLFR */
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{ "Juniper MLFR", "juniper-mlfr" },
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/* WTAP_ENCAP_JUNIPER_ETHER */
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{ "Juniper Ethernet", "juniper-ether" },
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/* WTAP_ENCAP_JUNIPER_PPP */
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{ "Juniper PPP", "juniper-ppp" },
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/* WTAP_ENCAP_JUNIPER_FRELAY */
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{ "Juniper Frame-Relay", "juniper-frelay" },
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/* WTAP_ENCAP_JUNIPER_CHDLC */
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{ "Juniper C-HDLC", "juniper-chdlc" },
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/* WTAP_ENCAP_JUNIPER_GGSN */
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{ "Juniper GGSN", "juniper-ggsn" },
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/* WTAP_ENCAP_LINUX_LAPD */
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{ "LAPD", "lapd" },
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/* WTAP_ENCAP_CATAPULT_DCT2000 */
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{ "Catapult DCT2000", "dct2000" },
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/* WTAP_ENCAP_BER */
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{ "ASN.1 Basic Encoding Rules", "ber" },
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/* WTAP_ENCAP_JUNIPER_VP */
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{ "Juniper Voice PIC", "juniper-vp" },
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/* WTAP_ENCAP_USB */
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{ "Raw USB packets", "usb" },
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/* WTAP_ENCAP_IEEE802_16_MAC_CPS */
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{ "IEEE 802.16 MAC Common Part Sublayer", "ieee-802-16-mac-cps" },
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/* WTAP_ENCAP_NETTL_RAW_TELNET */
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{ "Raw telnet with nettl headers", "raw-telnet-nettl" },
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/* WTAP_ENCAP_USB_LINUX */
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{ "USB packets with Linux header", "usb-linux" },
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/* WTAP_ENCAP_MPEG */
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{ "MPEG", "mpeg" },
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/* WTAP_ENCAP_PPI */
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{ "Per-Packet Information header", "ppi" }
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};
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gint wtap_num_encap_types = sizeof(encap_table_base) / sizeof(struct encap_type_info);
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static GArray* encap_table_arr = NULL;
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static const struct encap_type_info* encap_table = NULL;
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static void wtap_init_encap_types(void) {
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if (encap_table_arr) return;
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encap_table_arr = g_array_new(FALSE,TRUE,sizeof(struct encap_type_info));
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g_array_append_vals(encap_table_arr,encap_table_base,wtap_num_encap_types);
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encap_table = (void*)encap_table_arr->data;
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}
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int wtap_get_num_encap_types(void) {
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wtap_init_encap_types();
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return wtap_num_encap_types;
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}
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int wtap_register_encap_type(char* name, char* short_name) {
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struct encap_type_info* e = g_malloc(sizeof(struct encap_type_info));
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wtap_init_encap_types();
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e->name = g_strdup(name);
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e->short_name = g_strdup(short_name);
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g_array_append_val(encap_table_arr,e);
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encap_table = (void*)encap_table_arr->data;
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return wtap_num_encap_types++;
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}
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/* Name that should be somewhat descriptive. */
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const char
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*wtap_encap_string(int encap)
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{
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if (encap < 0 || encap >= WTAP_NUM_ENCAP_TYPES)
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return NULL;
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else
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return encap_table[encap].name;
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}
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/* Name to use in, say, a command-line flag specifying the type. */
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const char
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*wtap_encap_short_string(int encap)
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{
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if (encap < 0 || encap >= WTAP_NUM_ENCAP_TYPES)
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return NULL;
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else
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return encap_table[encap].short_name;
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}
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/* Translate a short name to a capture file type. */
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int
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wtap_short_string_to_encap(const char *short_name)
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{
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int encap;
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for (encap = 0; encap < WTAP_NUM_ENCAP_TYPES; encap++) {
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if (encap_table[encap].short_name != NULL &&
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strcmp(short_name, encap_table[encap].short_name) == 0)
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return encap;
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}
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return -1; /* no such encapsulation type */
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}
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static const char *wtap_errlist[] = {
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"The file isn't a plain file or pipe",
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"The file is being opened for random access but is a pipe",
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"The file isn't a capture file in a known format",
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"File contains record data we don't support",
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"That file format cannot be written to a pipe",
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NULL,
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"Files can't be saved in that format",
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"Files from that network type can't be saved in that format",
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"That file format doesn't support per-packet encapsulations",
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NULL,
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NULL,
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"Less data was read than was expected",
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"File contains a record that's not valid",
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"Less data was written than was requested",
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"Uncompression error: data oddly truncated",
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"Uncompression error: data would overflow buffer",
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"Uncompression error: bad LZ77 offset",
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"The standard input cannot be opened for random access"
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};
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#define WTAP_ERRLIST_SIZE (sizeof wtap_errlist / sizeof wtap_errlist[0])
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const char
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*wtap_strerror(int err)
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{
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static char errbuf[128];
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unsigned int wtap_errlist_index;
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if (err < 0) {
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#ifdef HAVE_LIBZ
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if (err >= WTAP_ERR_ZLIB_MIN && err <= WTAP_ERR_ZLIB_MAX) {
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/* Assume it's a zlib error. */
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sprintf(errbuf, "Uncompression error: %s",
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zError(err - WTAP_ERR_ZLIB));
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return errbuf;
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}
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#endif
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wtap_errlist_index = -1 - err;
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if (wtap_errlist_index >= WTAP_ERRLIST_SIZE) {
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sprintf(errbuf, "Error %d", err);
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return errbuf;
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}
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if (wtap_errlist[wtap_errlist_index] == NULL)
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return "Unknown reason";
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return wtap_errlist[wtap_errlist_index];
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} else
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return strerror(err);
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}
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/* Close only the sequential side, freeing up memory it uses.
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Note that we do *not* want to call the subtype's close function,
|
|
as it would free any per-subtype data, and that data may be
|
|
needed by the random-access side.
|
|
|
|
Instead, if the subtype has a "sequential close" function, we call it,
|
|
to free up stuff used only by the sequential side. */
|
|
void
|
|
wtap_sequential_close(wtap *wth)
|
|
{
|
|
if (wth->subtype_sequential_close != NULL)
|
|
(*wth->subtype_sequential_close)(wth);
|
|
|
|
if (wth->fh != NULL) {
|
|
file_close(wth->fh);
|
|
wth->fh = NULL;
|
|
}
|
|
|
|
if (wth->frame_buffer) {
|
|
buffer_free(wth->frame_buffer);
|
|
g_free(wth->frame_buffer);
|
|
wth->frame_buffer = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
wtap_close(wtap *wth)
|
|
{
|
|
wtap_sequential_close(wth);
|
|
|
|
if (wth->subtype_close != NULL)
|
|
(*wth->subtype_close)(wth);
|
|
|
|
if (wth->random_fh != NULL)
|
|
file_close(wth->random_fh);
|
|
|
|
g_free(wth);
|
|
}
|
|
|
|
gboolean
|
|
wtap_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
|
|
{
|
|
/*
|
|
* Set the packet encapsulation to the file's encapsulation
|
|
* value; if that's not WTAP_ENCAP_PER_PACKET, it's the
|
|
* right answer (and means that the read routine for this
|
|
* capture file type doesn't have to set it), and if it
|
|
* *is* WTAP_ENCAP_PER_PACKET, the caller needs to set it
|
|
* anyway.
|
|
*/
|
|
wth->phdr.pkt_encap = wth->file_encap;
|
|
|
|
if (!wth->subtype_read(wth, err, err_info, data_offset))
|
|
return FALSE; /* failure */
|
|
|
|
/*
|
|
* It makes no sense for the captured data length to be bigger
|
|
* than the actual data length.
|
|
*/
|
|
if (wth->phdr.caplen > wth->phdr.len)
|
|
wth->phdr.caplen = wth->phdr.len;
|
|
|
|
/*
|
|
* Make sure that it's not WTAP_ENCAP_PER_PACKET, as that
|
|
* probably means the file has that encapsulation type
|
|
* but the read routine didn't set this packet's
|
|
* encapsulation type.
|
|
*/
|
|
g_assert(wth->phdr.pkt_encap != WTAP_ENCAP_PER_PACKET);
|
|
|
|
return TRUE; /* success */
|
|
}
|
|
|
|
/*
|
|
* Return an approximation of the amount of data we've read sequentially
|
|
* from the file so far. (gint64, in case that's 64 bits.)
|
|
*/
|
|
gint64
|
|
wtap_read_so_far(wtap *wth, int *err)
|
|
{
|
|
off_t file_pos;
|
|
|
|
file_pos = eth_lseek(wth->fd, 0, SEEK_CUR);
|
|
if (file_pos == -1) {
|
|
if (err != NULL)
|
|
*err = errno;
|
|
return -1;
|
|
}
|
|
return file_pos;
|
|
}
|
|
|
|
struct wtap_pkthdr*
|
|
wtap_phdr(wtap *wth)
|
|
{
|
|
return &wth->phdr;
|
|
}
|
|
|
|
union wtap_pseudo_header*
|
|
wtap_pseudoheader(wtap *wth)
|
|
{
|
|
return &wth->pseudo_header;
|
|
}
|
|
|
|
guint8*
|
|
wtap_buf_ptr(wtap *wth)
|
|
{
|
|
return buffer_start_ptr(wth->frame_buffer);
|
|
}
|
|
|
|
gboolean
|
|
wtap_seek_read(wtap *wth, gint64 seek_off,
|
|
union wtap_pseudo_header *pseudo_header, guint8 *pd, int len,
|
|
int *err, gchar **err_info)
|
|
{
|
|
return wth->subtype_seek_read(wth, seek_off, pseudo_header, pd, len,
|
|
err, err_info);
|
|
}
|