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wireshark/wiretap/file.c

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I added the LANalzyer file format to wiretap. I cleaned up some code in the wiretap functions to be more generic and therefore allow an easier integration of more packet-capture file types. I also put in all the GPL copyrights in the wiretap code. svn path=/trunk/; revision=83
1998-11-12 06:01:27 +00:00
/* file.c
*
Add support to wiretap for reading Sun "snoop" capture files. That requires that, in the packet-reading loop, we pass to the callback routine the offset in the file of a packet's data, because we can no longer compute that offset by subtracting the size of the captured packet data from the offset in the file after the data was read - "snoop" may stick padding in after the packet data to align packet headers on 4-byte boundaries. Doing that required that we arrange that we do that for "libpcap" capture files as well; the cleanest way to do that was to write our own code for reading "libpcap" capture files, rather than using the "libpcap" code to do it. Make "wtap_dispatch_cb()" and "pcap_dispatch_cb()" static to "file.c", as they're not used elsewhere. If we're using wiretap, don't define in "file.h" stuff used only when we're not using wiretap. Update the wiretap README to reflect Gilbert's and my recent changes. Clean up some memory leaks in "wiretap/lanalyzer.c" and "wiretap/ngsniffer.c", where the capture-file-format-specific data wasn't freed if the open failed. svn path=/trunk/; revision=91
1998-11-15 05:29:17 +00:00
* $Id: file.c,v 1.4 1998/11/15 05:29:09 guy Exp $
I added the LANalzyer file format to wiretap. I cleaned up some code in the wiretap functions to be more generic and therefore allow an easier integration of more packet-capture file types. I also put in all the GPL copyrights in the wiretap code. svn path=/trunk/; revision=83
1998-11-12 06:01:27 +00:00
*
* Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
#include <stdio.h>
#include <string.h>
More patches from Guy, cleaning up warnings when using gcc -Wall. svn path=/trunk/; revision=86
1998-11-12 23:29:34 +00:00
#include <stdlib.h>
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
#include "wtap.h"
I added the LANalzyer file format to wiretap. I cleaned up some code in the wiretap functions to be more generic and therefore allow an easier integration of more packet-capture file types. I also put in all the GPL copyrights in the wiretap code. svn path=/trunk/; revision=83
1998-11-12 06:01:27 +00:00
#include "lanalyzer.h"
#include "ngsniffer.h"
Add support to wiretap for reading Sun "snoop" capture files. That requires that, in the packet-reading loop, we pass to the callback routine the offset in the file of a packet's data, because we can no longer compute that offset by subtracting the size of the captured packet data from the offset in the file after the data was read - "snoop" may stick padding in after the packet data to align packet headers on 4-byte boundaries. Doing that required that we arrange that we do that for "libpcap" capture files as well; the cleanest way to do that was to write our own code for reading "libpcap" capture files, rather than using the "libpcap" code to do it. Make "wtap_dispatch_cb()" and "pcap_dispatch_cb()" static to "file.c", as they're not used elsewhere. If we're using wiretap, don't define in "file.h" stuff used only when we're not using wiretap. Update the wiretap README to reflect Gilbert's and my recent changes. Clean up some memory leaks in "wiretap/lanalyzer.c" and "wiretap/ngsniffer.c", where the capture-file-format-specific data wasn't freed if the open failed. svn path=/trunk/; revision=91
1998-11-15 05:29:17 +00:00
#include "libpcap.h"
#include "snoop.h"
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
/* The open_file_* routines should return the WTAP_FILE_* type
* that they are checking for if the file is successfully recognized
* as such. If the file is not of that type, the routine should return
* WTAP_FILE_UNKNOWN */
/* Opens a file and prepares a wtap struct */
wtap* wtap_open_offline(char *filename, int filetype)
{
wtap *wth;
wth = (wtap*)malloc(sizeof(wtap));
/* Open the file */
if (!(wth->fh = fopen(filename, "rb"))) {
return NULL;
}
/* If the filetype is unknown, try all my file types */
if (filetype == WTAP_FILE_UNKNOWN) {
/* WTAP_FILE_PCAP */
Add support to wiretap for reading Sun "snoop" capture files. That requires that, in the packet-reading loop, we pass to the callback routine the offset in the file of a packet's data, because we can no longer compute that offset by subtracting the size of the captured packet data from the offset in the file after the data was read - "snoop" may stick padding in after the packet data to align packet headers on 4-byte boundaries. Doing that required that we arrange that we do that for "libpcap" capture files as well; the cleanest way to do that was to write our own code for reading "libpcap" capture files, rather than using the "libpcap" code to do it. Make "wtap_dispatch_cb()" and "pcap_dispatch_cb()" static to "file.c", as they're not used elsewhere. If we're using wiretap, don't define in "file.h" stuff used only when we're not using wiretap. Update the wiretap README to reflect Gilbert's and my recent changes. Clean up some memory leaks in "wiretap/lanalyzer.c" and "wiretap/ngsniffer.c", where the capture-file-format-specific data wasn't freed if the open failed. svn path=/trunk/; revision=91
1998-11-15 05:29:17 +00:00
if ((wth->file_type = libpcap_open(wth)) != WTAP_FILE_UNKNOWN) {
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
goto success;
}
/* WTAP_FILE_NGSNIFFER */
More patches from Guy, cleaning up warnings when using gcc -Wall. svn path=/trunk/; revision=86
1998-11-12 23:29:34 +00:00
if ((wth->file_type = ngsniffer_open(wth)) != WTAP_FILE_UNKNOWN) {
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
goto success;
}
/* WTAP_FILE_LANALYZER */
More patches from Guy, cleaning up warnings when using gcc -Wall. svn path=/trunk/; revision=86
1998-11-12 23:29:34 +00:00
if ((wth->file_type = lanalyzer_open(wth)) != WTAP_FILE_UNKNOWN) {
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
goto success;
}
Add support to wiretap for reading Sun "snoop" capture files. That requires that, in the packet-reading loop, we pass to the callback routine the offset in the file of a packet's data, because we can no longer compute that offset by subtracting the size of the captured packet data from the offset in the file after the data was read - "snoop" may stick padding in after the packet data to align packet headers on 4-byte boundaries. Doing that required that we arrange that we do that for "libpcap" capture files as well; the cleanest way to do that was to write our own code for reading "libpcap" capture files, rather than using the "libpcap" code to do it. Make "wtap_dispatch_cb()" and "pcap_dispatch_cb()" static to "file.c", as they're not used elsewhere. If we're using wiretap, don't define in "file.h" stuff used only when we're not using wiretap. Update the wiretap README to reflect Gilbert's and my recent changes. Clean up some memory leaks in "wiretap/lanalyzer.c" and "wiretap/ngsniffer.c", where the capture-file-format-specific data wasn't freed if the open failed. svn path=/trunk/; revision=91
1998-11-15 05:29:17 +00:00
/* WTAP_FILE_SNOOP */
if ((wth->file_type = snoop_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
printf("failed\n");
/* WTAP_FILE_UNKNOWN */
goto failure;
}
/* If the user tells us what the file is supposed to be, check it */
switch (filetype) {
case WTAP_FILE_PCAP:
Add support to wiretap for reading Sun "snoop" capture files. That requires that, in the packet-reading loop, we pass to the callback routine the offset in the file of a packet's data, because we can no longer compute that offset by subtracting the size of the captured packet data from the offset in the file after the data was read - "snoop" may stick padding in after the packet data to align packet headers on 4-byte boundaries. Doing that required that we arrange that we do that for "libpcap" capture files as well; the cleanest way to do that was to write our own code for reading "libpcap" capture files, rather than using the "libpcap" code to do it. Make "wtap_dispatch_cb()" and "pcap_dispatch_cb()" static to "file.c", as they're not used elsewhere. If we're using wiretap, don't define in "file.h" stuff used only when we're not using wiretap. Update the wiretap README to reflect Gilbert's and my recent changes. Clean up some memory leaks in "wiretap/lanalyzer.c" and "wiretap/ngsniffer.c", where the capture-file-format-specific data wasn't freed if the open failed. svn path=/trunk/; revision=91
1998-11-15 05:29:17 +00:00
if ((wth->file_type = libpcap_open(wth)) != WTAP_FILE_UNKNOWN) {
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
goto success;
}
break;
case WTAP_FILE_NGSNIFFER:
More patches from Guy, cleaning up warnings when using gcc -Wall. svn path=/trunk/; revision=86
1998-11-12 23:29:34 +00:00
if ((wth->file_type = ngsniffer_open(wth)) != WTAP_FILE_UNKNOWN) {
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
goto success;
}
break;
case WTAP_FILE_LANALYZER:
More patches from Guy, cleaning up warnings when using gcc -Wall. svn path=/trunk/; revision=86
1998-11-12 23:29:34 +00:00
if ((wth->file_type = lanalyzer_open(wth)) != WTAP_FILE_UNKNOWN) {
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
goto success;
}
break;
Add support to wiretap for reading Sun "snoop" capture files. That requires that, in the packet-reading loop, we pass to the callback routine the offset in the file of a packet's data, because we can no longer compute that offset by subtracting the size of the captured packet data from the offset in the file after the data was read - "snoop" may stick padding in after the packet data to align packet headers on 4-byte boundaries. Doing that required that we arrange that we do that for "libpcap" capture files as well; the cleanest way to do that was to write our own code for reading "libpcap" capture files, rather than using the "libpcap" code to do it. Make "wtap_dispatch_cb()" and "pcap_dispatch_cb()" static to "file.c", as they're not used elsewhere. If we're using wiretap, don't define in "file.h" stuff used only when we're not using wiretap. Update the wiretap README to reflect Gilbert's and my recent changes. Clean up some memory leaks in "wiretap/lanalyzer.c" and "wiretap/ngsniffer.c", where the capture-file-format-specific data wasn't freed if the open failed. svn path=/trunk/; revision=91
1998-11-15 05:29:17 +00:00
case WTAP_FILE_SNOOP:
if ((wth->file_type = snoop_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
break;
A lengthy patch to add the wiretap library. Wiretap is not used by default because it is still in its infancy, but it can be compiled in optionally. The library exists in its own subdirectory ethereal/wiretap. This patch also edits all the packet-*.c files to remove the #include <pcap.h> line which is unnecessary in these files. In the ethereal code, file.c is the most heavily modified with #ifdef WITH_WIRETAP lines for the optional library. svn path=/trunk/; revision=82
1998-11-12 00:06:47 +00:00
default:
goto failure;
}
/* If we made it through the switch() statement w/o going to "success",
* then we failed. */
goto failure;
failure:
fclose(wth->fh);
free(wth);
wth = NULL;
return wth;
success:
buffer_init(&wth->frame_buffer, 1500);
wth->frame_number = 0;
wth->file_byte_offset = 0;
return wth;
}