1998-11-12 06:01:27 +00:00
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/* wtap.c
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*
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2000-03-22 07:06:59 +00:00
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* $Id: wtap.c,v 1.38 2000/03/22 07:06:55 guy Exp $
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1998-11-12 06:01:27 +00:00
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*
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* Wiretap Library
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2000-01-22 06:22:44 +00:00
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* Copyright (c) 1998 by Gilbert Ramirez <gram@xiexie.org>
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1998-11-12 06:01:27 +00:00
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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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*/
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1999-08-22 02:52:48 +00:00
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#include <string.h>
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1999-09-22 01:26:50 +00:00
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#include <errno.h>
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1999-08-22 02:52:48 +00:00
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1999-07-13 02:53:26 +00:00
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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1998-11-12 00:06:47 +00:00
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#include "wtap.h"
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2000-01-13 07:09:20 +00:00
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#include "file_wrappers.h"
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1999-03-01 18:57:07 +00:00
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#include "buffer.h"
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1999-09-11 06:48:33 +00:00
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#include "ascend.h"
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1999-10-31 17:46:11 +00:00
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#include "toshiba.h"
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1998-11-12 00:06:47 +00:00
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FILE* wtap_file(wtap *wth)
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{
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1998-11-15 05:29:17 +00:00
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return wth->fh;
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1998-11-12 00:06:47 +00:00
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}
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1999-09-23 04:39:01 +00:00
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int wtap_fd(wtap *wth)
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{
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return wth->fd;
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}
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1998-11-12 00:06:47 +00:00
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int 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 wtap_snapshot_length(wtap *wth)
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{
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1998-11-15 05:29:17 +00:00
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return wth->snapshot_length;
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1998-11-12 00:06:47 +00:00
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}
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Add "wtap_file_encap()", to return the encapsulation of packets in the
file (which could be WTAP_ENCAP_UNKNOWN, if we couldn't determine it, or
WTAP_ENCAP_PER_PACKET, if we could determine the encapsulation of
packets in the file, but they didn't all have the same encapsulation).
This may be useful in the future, if we allow files to be saved in
different capture file formats - we'd have to specify, when creating the
capture file, the per-file encapsulation, for those formats that don't
support per-packet encapsulations (we wouldn't be able to save a
multi-encapsulation capture in those formats).
Make the code to read "iptrace" files set the per-file packet
encapsulation - set it to the type of the first packet seen, and, if any
subsequent packets have a different encapsulation, set it to
WTAP_ENCAP_PER_PACKET.
svn path=/trunk/; revision=772
1999-10-06 03:29:36 +00:00
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int 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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1999-12-05 01:24:54 +00:00
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/* Table of the encapsulation types we know about. */
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const static struct encap_type_info {
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const char *name;
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const char *short_name;
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} encap_table[WTAP_NUM_ENCAP_TYPES] = {
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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_TR */
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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_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_SNIFFER */
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{ "ATM Sniffer", "atm-sniffer" },
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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_LAPD */
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1999-12-12 22:40:10 +00:00
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{ "LAPD", "lapd" },
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/* WTAP_ENCAP_V120 */
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1999-12-12 22:53:25 +00:00
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{ "V.120", "v120" },
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1999-12-05 01:24:54 +00:00
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};
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/* Name that should be somewhat descriptive. */
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const char *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 *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 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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1999-08-22 02:52:48 +00:00
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static const char *wtap_errlist[] = {
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"The file isn't a plain file",
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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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NULL,
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"Files can't be saved in that format",
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1999-08-22 03:50:31 +00:00
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"Files from that network type can't be saved in that format",
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1999-08-22 02:52:48 +00:00
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"That 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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};
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#define WTAP_ERRLIST_SIZE (sizeof wtap_errlist / sizeof wtap_errlist[0])
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const char *wtap_strerror(int err)
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{
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static char errbuf[6+11+1]; /* "Error %d" */
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int wtap_errlist_index;
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if (err < 0) {
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1999-10-05 07:22:53 +00:00
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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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1999-08-22 02:52:48 +00:00
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wtap_errlist_index = -1 - err;
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if (wtap_errlist_index >= WTAP_ERRLIST_SIZE) {
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1999-10-05 07:22:53 +00:00
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sprintf(errbuf, "Error %d", err);
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1999-08-22 02:52:48 +00:00
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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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1998-11-12 00:06:47 +00:00
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void wtap_close(wtap *wth)
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{
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2000-03-22 07:06:59 +00:00
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if (wth->subtype_close != NULL)
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(*wth->subtype_close)(wth);
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1999-01-07 16:15:37 +00:00
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1999-09-22 01:26:50 +00:00
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file_close(wth->fh);
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1999-11-10 19:47:57 +00:00
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1999-11-10 19:58:54 +00:00
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if (wth->frame_buffer) {
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buffer_free(wth->frame_buffer);
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1999-11-10 19:47:57 +00:00
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g_free(wth->frame_buffer);
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1999-11-10 19:58:54 +00:00
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}
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1999-11-10 19:47:57 +00:00
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g_free(wth);
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1998-11-12 00:06:47 +00:00
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}
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Have the per-capture-file-type open routines "wtap_open_offline()" calls
return 1 on success, -1 if they got an error, and 0 if the file isn't of
the type that file is checking for, and supply an error code if they
return -1; have "wtap_open_offline()" use that error code. Also, have
the per-capture-file-type open routines treat errors accessing the file
as errors, and return -1, rather than just returning 0 so that we try
another file type.
Have the per-capture-file-type read routines "wtap_loop()" calls return
-1 and supply an error code on error (and not, as they did in some
cases, call "g_error()" and abort), and have "wtap_loop()", if the read
routine returned an error, return FALSE (and pass an error-code-pointer
argument onto the read routines, so they fill it in), and return TRUE on
success.
Add some new error codes for them to return.
Now that "wtap_loop()" can return a success/failure indication and an
error code, in "read_cap_file()" put up a message box if we get an error
reading the file, and return the error code.
Handle the additional errors we can get when opening a capture file.
If the attempt to open a capture file succeeds, but the attempt to read
it fails, don't treat that as a complete failure - we may have managed
to read some of the capture file, and we should display what we managed
to read.
svn path=/trunk/; revision=516
1999-08-19 05:31:38 +00:00
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int wtap_loop(wtap *wth, int count, wtap_handler callback, u_char* user,
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int *err)
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1998-11-12 00:06:47 +00:00
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{
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1999-07-28 20:17:24 +00:00
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int data_offset, loop = 0;
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1998-11-12 00:06:47 +00:00
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Have the per-capture-file-type open routines "wtap_open_offline()" calls
return 1 on success, -1 if they got an error, and 0 if the file isn't of
the type that file is checking for, and supply an error code if they
return -1; have "wtap_open_offline()" use that error code. Also, have
the per-capture-file-type open routines treat errors accessing the file
as errors, and return -1, rather than just returning 0 so that we try
another file type.
Have the per-capture-file-type read routines "wtap_loop()" calls return
-1 and supply an error code on error (and not, as they did in some
cases, call "g_error()" and abort), and have "wtap_loop()", if the read
routine returned an error, return FALSE (and pass an error-code-pointer
argument onto the read routines, so they fill it in), and return TRUE on
success.
Add some new error codes for them to return.
Now that "wtap_loop()" can return a success/failure indication and an
error code, in "read_cap_file()" put up a message box if we get an error
reading the file, and return the error code.
Handle the additional errors we can get when opening a capture file.
If the attempt to open a capture file succeeds, but the attempt to read
it fails, don't treat that as a complete failure - we may have managed
to read some of the capture file, and we should display what we managed
to read.
svn path=/trunk/; revision=516
1999-08-19 05:31:38 +00:00
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while ((data_offset = wth->subtype_read(wth, err)) > 0) {
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1999-07-07 22:52:57 +00:00
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callback(user, &wth->phdr, data_offset,
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buffer_start_ptr(wth->frame_buffer));
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Have the per-capture-file-type open routines "wtap_open_offline()" calls
return 1 on success, -1 if they got an error, and 0 if the file isn't of
the type that file is checking for, and supply an error code if they
return -1; have "wtap_open_offline()" use that error code. Also, have
the per-capture-file-type open routines treat errors accessing the file
as errors, and return -1, rather than just returning 0 so that we try
another file type.
Have the per-capture-file-type read routines "wtap_loop()" calls return
-1 and supply an error code on error (and not, as they did in some
cases, call "g_error()" and abort), and have "wtap_loop()", if the read
routine returned an error, return FALSE (and pass an error-code-pointer
argument onto the read routines, so they fill it in), and return TRUE on
success.
Add some new error codes for them to return.
Now that "wtap_loop()" can return a success/failure indication and an
error code, in "read_cap_file()" put up a message box if we get an error
reading the file, and return the error code.
Handle the additional errors we can get when opening a capture file.
If the attempt to open a capture file succeeds, but the attempt to read
it fails, don't treat that as a complete failure - we may have managed
to read some of the capture file, and we should display what we managed
to read.
svn path=/trunk/; revision=516
1999-08-19 05:31:38 +00:00
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if (count > 0 && ++loop >= count)
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break;
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1998-11-12 00:06:47 +00:00
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}
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Have the per-capture-file-type open routines "wtap_open_offline()" calls
return 1 on success, -1 if they got an error, and 0 if the file isn't of
the type that file is checking for, and supply an error code if they
return -1; have "wtap_open_offline()" use that error code. Also, have
the per-capture-file-type open routines treat errors accessing the file
as errors, and return -1, rather than just returning 0 so that we try
another file type.
Have the per-capture-file-type read routines "wtap_loop()" calls return
-1 and supply an error code on error (and not, as they did in some
cases, call "g_error()" and abort), and have "wtap_loop()", if the read
routine returned an error, return FALSE (and pass an error-code-pointer
argument onto the read routines, so they fill it in), and return TRUE on
success.
Add some new error codes for them to return.
Now that "wtap_loop()" can return a success/failure indication and an
error code, in "read_cap_file()" put up a message box if we get an error
reading the file, and return the error code.
Handle the additional errors we can get when opening a capture file.
If the attempt to open a capture file succeeds, but the attempt to read
it fails, don't treat that as a complete failure - we may have managed
to read some of the capture file, and we should display what we managed
to read.
svn path=/trunk/; revision=516
1999-08-19 05:31:38 +00:00
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if (data_offset < 0)
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return FALSE; /* failure */
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else
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return TRUE; /* success */
|
1998-11-12 00:06:47 +00:00
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}
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1999-09-11 04:50:44 +00:00
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1999-10-31 17:46:11 +00:00
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int wtap_seek_read(int file_type, FILE *fh, int seek_off, guint8 *pd, int len)
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1999-09-11 06:48:33 +00:00
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{
|
1999-10-31 17:46:11 +00:00
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switch (file_type) {
|
1999-09-11 06:48:33 +00:00
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1999-10-31 17:46:11 +00:00
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case WTAP_FILE_ASCEND:
|
1999-09-11 06:48:33 +00:00
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return ascend_seek_read(fh, seek_off, pd, len);
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1999-10-31 17:46:11 +00:00
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case WTAP_FILE_TOSHIBA:
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return toshiba_seek_read(fh, seek_off, pd, len);
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|
1999-09-11 06:48:33 +00:00
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default:
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return wtap_def_seek_read(fh, seek_off, pd, len);
|
1999-09-11 04:50:44 +00:00
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}
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}
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