2000-08-08 22:16:42 +00:00
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/* csids.c
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*
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* Copyright (c) 2000 by Mike Hall <mlh@io.com>
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* Copyright (c) 2000 by Cisco Systems
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2002-08-28 20:30:45 +00:00
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*
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2000-08-08 22:16:42 +00:00
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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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2002-08-28 20:30:45 +00:00
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*
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2000-08-08 22:16:42 +00:00
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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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2002-08-28 20:30:45 +00:00
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*
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2000-08-08 22:16:42 +00:00
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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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2012-06-28 22:56:06 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2000-08-08 22:16:42 +00:00
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*/
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2002-03-04 00:25:35 +00:00
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2000-08-08 22:16:42 +00:00
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#include "config.h"
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#include "wtap-int.h"
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2014-07-15 23:40:46 +00:00
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#include <wsutil/buffer.h>
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2000-08-08 22:16:42 +00:00
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#include "csids.h"
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#include "file_wrappers.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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2002-08-28 20:30:45 +00:00
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/*
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2012-04-19 23:58:53 +00:00
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* This module reads the output from the Cisco Secure Intrusion Detection
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2002-08-28 20:30:45 +00:00
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* System iplogging facility. The term iplogging is misleading since this
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* logger will only output TCP. There is no link layer information.
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2000-08-08 22:16:42 +00:00
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* Packet format is 4 byte timestamp (seconds since epoch), and a 4 byte size
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* of data following for that packet.
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*
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* For a time there was an error in iplogging and the ip length, flags, and id
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2002-03-04 00:25:35 +00:00
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* were byteswapped. We will check for this and handle it before handing to
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2006-05-28 15:56:15 +00:00
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* wireshark.
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2000-08-08 22:16:42 +00:00
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*/
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2013-05-16 23:42:10 +00:00
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typedef struct {
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gboolean byteswapped;
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} csids_t;
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2014-05-23 10:50:02 +00:00
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static gboolean csids_read(wtap *wth, int *err, gchar **err_info,
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2006-11-05 22:46:44 +00:00
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gint64 *data_offset);
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2014-05-23 10:50:02 +00:00
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static gboolean csids_seek_read(wtap *wth, gint64 seek_off,
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2014-05-09 05:18:49 +00:00
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struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info);
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2013-06-17 21:18:47 +00:00
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static gboolean csids_read_packet(FILE_T fh, csids_t *csids,
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struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info);
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2000-08-08 22:16:42 +00:00
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struct csids_header {
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guint32 seconds; /* seconds since epoch */
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2000-08-15 18:19:06 +00:00
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guint16 zeropad; /* 2 byte zero'ed pads */
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guint16 caplen; /* the capture length */
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2000-08-08 22:16:42 +00:00
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};
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2014-10-09 23:44:15 +00:00
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wtap_open_return_val csids_open(wtap *wth, int *err, gchar **err_info)
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2000-08-08 22:16:42 +00:00
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{
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2002-08-28 20:30:45 +00:00
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/* There is no file header. There is only a header for each packet
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* so we read a packet header and compare the caplen with iplen. They
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2013-02-26 04:42:26 +00:00
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* should always be equal except with the weird byteswap version.
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2002-08-28 20:30:45 +00:00
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*
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* THIS IS BROKEN-- anytime the caplen is 0x0101 or 0x0202 up to 0x0505
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* this will byteswap it. I need to fix this. XXX --mlh
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2000-08-08 22:16:42 +00:00
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*/
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Add some higher-level file-read APIs and use them.
Add wtap_read_bytes(), which takes a FILE_T, a pointer, a byte count, an
error number pointer, and an error string pointer as arguments, and that
treats a short read of any sort, including a read that returns 0 bytes,
as a WTAP_ERR_SHORT_READ error, and that returns the error number and
string through its last two arguments.
Add wtap_read_bytes_or_eof(), which is similar, but that treats a read
that returns 0 bytes as an EOF, supplying an error number of 0 as an EOF
indication.
Use those in file readers; that simplifies the code and makes it less
likely that somebody will fail to supply the error number and error
string on a file read error.
Change-Id: Ia5dba2a6f81151e87b614461349d611cffc16210
Reviewed-on: https://code.wireshark.org/review/4512
Reviewed-by: Guy Harris <guy@alum.mit.edu>
2014-10-07 01:00:57 +00:00
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int tmp,iplen;
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2002-08-28 20:30:45 +00:00
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2000-08-08 22:16:42 +00:00
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gboolean byteswap = FALSE;
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struct csids_header hdr;
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2010-02-26 07:59:54 +00:00
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csids_t *csids;
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2000-08-08 22:16:42 +00:00
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2002-08-28 20:30:45 +00:00
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/* check the file to make sure it is a csids file. */
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Add some higher-level file-read APIs and use them.
Add wtap_read_bytes(), which takes a FILE_T, a pointer, a byte count, an
error number pointer, and an error string pointer as arguments, and that
treats a short read of any sort, including a read that returns 0 bytes,
as a WTAP_ERR_SHORT_READ error, and that returns the error number and
string through its last two arguments.
Add wtap_read_bytes_or_eof(), which is similar, but that treats a read
that returns 0 bytes as an EOF, supplying an error number of 0 as an EOF
indication.
Use those in file readers; that simplifies the code and makes it less
likely that somebody will fail to supply the error number and error
string on a file read error.
Change-Id: Ia5dba2a6f81151e87b614461349d611cffc16210
Reviewed-on: https://code.wireshark.org/review/4512
Reviewed-by: Guy Harris <guy@alum.mit.edu>
2014-10-07 01:00:57 +00:00
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if( !wtap_read_bytes( wth->fh, &hdr, sizeof( struct csids_header), err, err_info ) ) {
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if( *err != WTAP_ERR_SHORT_READ ) {
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_ERROR;
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2000-08-08 22:16:42 +00:00
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}
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2000-08-08 22:16:42 +00:00
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}
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2008-07-08 22:24:32 +00:00
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if( hdr.zeropad != 0 || hdr.caplen == 0 ) {
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2000-08-15 18:19:06 +00:00
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}
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2013-12-03 20:35:50 +00:00
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hdr.seconds = pntoh32( &hdr.seconds );
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hdr.caplen = pntoh16( &hdr.caplen );
|
Add some higher-level file-read APIs and use them.
Add wtap_read_bytes(), which takes a FILE_T, a pointer, a byte count, an
error number pointer, and an error string pointer as arguments, and that
treats a short read of any sort, including a read that returns 0 bytes,
as a WTAP_ERR_SHORT_READ error, and that returns the error number and
string through its last two arguments.
Add wtap_read_bytes_or_eof(), which is similar, but that treats a read
that returns 0 bytes as an EOF, supplying an error number of 0 as an EOF
indication.
Use those in file readers; that simplifies the code and makes it less
likely that somebody will fail to supply the error number and error
string on a file read error.
Change-Id: Ia5dba2a6f81151e87b614461349d611cffc16210
Reviewed-on: https://code.wireshark.org/review/4512
Reviewed-by: Guy Harris <guy@alum.mit.edu>
2014-10-07 01:00:57 +00:00
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if( !wtap_read_bytes( wth->fh, &tmp, 2, err, err_info ) ) {
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if( *err != WTAP_ERR_SHORT_READ ) {
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_ERROR;
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2000-08-08 22:16:42 +00:00
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}
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2000-08-08 22:16:42 +00:00
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}
|
Add some higher-level file-read APIs and use them.
Add wtap_read_bytes(), which takes a FILE_T, a pointer, a byte count, an
error number pointer, and an error string pointer as arguments, and that
treats a short read of any sort, including a read that returns 0 bytes,
as a WTAP_ERR_SHORT_READ error, and that returns the error number and
string through its last two arguments.
Add wtap_read_bytes_or_eof(), which is similar, but that treats a read
that returns 0 bytes as an EOF, supplying an error number of 0 as an EOF
indication.
Use those in file readers; that simplifies the code and makes it less
likely that somebody will fail to supply the error number and error
string on a file read error.
Change-Id: Ia5dba2a6f81151e87b614461349d611cffc16210
Reviewed-on: https://code.wireshark.org/review/4512
Reviewed-by: Guy Harris <guy@alum.mit.edu>
2014-10-07 01:00:57 +00:00
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if( !wtap_read_bytes(wth->fh, &iplen, 2, err, err_info ) ) {
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if( *err != WTAP_ERR_SHORT_READ ) {
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_ERROR;
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2000-08-08 22:16:42 +00:00
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}
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2000-08-08 22:16:42 +00:00
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}
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2013-12-03 20:35:50 +00:00
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iplen = pntoh16(&iplen);
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2008-07-08 22:24:32 +00:00
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if ( iplen == 0 )
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2008-07-08 22:24:32 +00:00
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2000-08-15 18:19:06 +00:00
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/* if iplen and hdr.caplen are equal, default to no byteswap. */
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if( iplen > hdr.caplen ) {
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2000-08-08 22:16:42 +00:00
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/* maybe this is just a byteswapped version. the iplen ipflags */
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/* and ipid are swapped. We cannot use the normal swaps because */
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/* we don't know the host */
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2013-11-29 19:21:20 +00:00
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iplen = GUINT16_SWAP_LE_BE(iplen);
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2000-08-15 18:19:06 +00:00
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if( iplen <= hdr.caplen ) {
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2000-08-08 22:16:42 +00:00
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/* we know this format */
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byteswap = TRUE;
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} else {
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/* don't know this one */
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2000-08-08 22:16:42 +00:00
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}
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} else {
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byteswap = FALSE;
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2002-08-28 20:30:45 +00:00
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}
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2000-08-08 22:16:42 +00:00
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2002-03-04 00:25:35 +00:00
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/* no file header. So reset the fh to 0 so we can read the first packet */
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2014-05-09 05:18:49 +00:00
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_ERROR;
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2002-03-04 00:25:35 +00:00
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2010-02-26 07:59:54 +00:00
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csids = (csids_t *)g_malloc(sizeof(csids_t));
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2014-05-09 05:18:49 +00:00
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wth->priv = (void *)csids;
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2010-02-26 07:59:54 +00:00
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csids->byteswapped = byteswap;
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2014-05-09 05:18:49 +00:00
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wth->file_encap = WTAP_ENCAP_RAW_IP;
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_CSIDS;
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wth->snapshot_length = 0; /* not known */
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wth->subtype_read = csids_read;
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wth->subtype_seek_read = csids_seek_read;
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2014-09-28 18:37:06 +00:00
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wth->file_tsprec = WTAP_TSPREC_SEC;
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2000-08-08 22:16:42 +00:00
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_MINE;
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2000-08-08 22:16:42 +00:00
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}
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2005-04-03 11:00:49 +00:00
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/* Find the next packet and parse it; called from wtap_read(). */
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2014-05-23 10:50:02 +00:00
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static gboolean csids_read(wtap *wth, int *err, gchar **err_info,
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2006-11-05 22:46:44 +00:00
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gint64 *data_offset)
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2000-08-08 22:16:42 +00:00
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{
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2014-05-09 05:18:49 +00:00
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csids_t *csids = (csids_t *)wth->priv;
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2000-09-07 05:34:23 +00:00
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2014-05-09 05:18:49 +00:00
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*data_offset = file_tell(wth->fh);
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2000-08-08 22:16:42 +00:00
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2014-05-23 10:50:02 +00:00
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return csids_read_packet( wth->fh, csids, &wth->phdr, wth->frame_buffer,
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err, err_info );
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2000-08-08 22:16:42 +00:00
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}
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/* Used to read packets in random-access fashion */
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2014-05-23 10:50:02 +00:00
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static gboolean
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2014-05-09 05:18:49 +00:00
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csids_seek_read(wtap *wth,
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2006-11-05 22:46:44 +00:00
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gint64 seek_off,
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2014-05-09 05:18:49 +00:00
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struct wtap_pkthdr *phdr,
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2013-06-16 00:20:00 +00:00
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Buffer *buf,
|
Have the Wiretap open, read, and seek-and-read routines return, in
addition to an error code, an error info string, for
WTAP_ERR_UNSUPPORTED, WTAP_ERR_UNSUPPORTED_ENCAP, and
WTAP_ERR_BAD_RECORD errors. Replace the error messages logged with
"g_message()" for those errors with g_strdup()ed or g_strdup_printf()ed
strings returned as the error info string, and change the callers of
those routines to, for those errors, put the info string into the
printed message or alert box for the error.
Add messages for cases where those errors were returned without printing
an additional message.
Nobody uses the error code from "cf_read()" - "cf_read()" puts up the
alert box itself for failures; get rid of the error code, so it just
returns a success/failure indication.
Rename "file_read_error_message()" to "cf_read_error_message()", as it
handles read errors from Wiretap, and have it take an error info string
as an argument. (That handles a lot of the work of putting the info
string into the error message.)
Make some variables in "ascend-grammar.y" static.
Check the return value of "erf_read_header()" in "erf_seek_read()".
Get rid of an unused #define in "i4btrace.c".
svn path=/trunk/; revision=9852
2004-01-25 21:55:17 +00:00
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int *err,
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gchar **err_info)
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2000-08-08 22:16:42 +00:00
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{
|
2014-05-09 05:18:49 +00:00
|
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csids_t *csids = (csids_t *)wth->priv;
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2000-08-08 22:16:42 +00:00
|
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|
2014-05-09 05:18:49 +00:00
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if( file_seek( wth->random_fh, seek_off, SEEK_SET, err ) == -1 )
|
2014-05-23 10:50:02 +00:00
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return FALSE;
|
2000-08-08 22:16:42 +00:00
|
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2014-05-09 05:18:49 +00:00
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if( !csids_read_packet( wth->random_fh, csids, phdr, buf, err, err_info ) ) {
|
2013-06-17 21:18:47 +00:00
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if( *err == 0 )
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*err = WTAP_ERR_SHORT_READ;
|
2014-05-23 10:50:02 +00:00
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return FALSE;
|
2013-05-16 23:42:10 +00:00
|
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|
}
|
2014-05-23 10:50:02 +00:00
|
|
|
return TRUE;
|
2013-05-16 23:42:10 +00:00
|
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|
}
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static gboolean
|
2013-06-17 21:18:47 +00:00
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csids_read_packet(FILE_T fh, csids_t *csids, struct wtap_pkthdr *phdr,
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Buffer *buf, int *err, gchar **err_info)
|
2013-05-16 23:42:10 +00:00
|
|
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{
|
|
|
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struct csids_header hdr;
|
2013-06-17 21:18:47 +00:00
|
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|
guint8 *pd;
|
2013-05-16 23:42:10 +00:00
|
|
|
|
Add some higher-level file-read APIs and use them.
Add wtap_read_bytes(), which takes a FILE_T, a pointer, a byte count, an
error number pointer, and an error string pointer as arguments, and that
treats a short read of any sort, including a read that returns 0 bytes,
as a WTAP_ERR_SHORT_READ error, and that returns the error number and
string through its last two arguments.
Add wtap_read_bytes_or_eof(), which is similar, but that treats a read
that returns 0 bytes as an EOF, supplying an error number of 0 as an EOF
indication.
Use those in file readers; that simplifies the code and makes it less
likely that somebody will fail to supply the error number and error
string on a file read error.
Change-Id: Ia5dba2a6f81151e87b614461349d611cffc16210
Reviewed-on: https://code.wireshark.org/review/4512
Reviewed-by: Guy Harris <guy@alum.mit.edu>
2014-10-07 01:00:57 +00:00
|
|
|
if( !wtap_read_bytes_or_eof( fh, &hdr, sizeof( struct csids_header), err, err_info ) )
|
2002-03-05 08:40:27 +00:00
|
|
|
return FALSE;
|
2013-12-03 20:35:50 +00:00
|
|
|
hdr.seconds = pntoh32(&hdr.seconds);
|
|
|
|
hdr.caplen = pntoh16(&hdr.caplen);
|
2002-08-28 20:30:45 +00:00
|
|
|
|
2014-05-24 18:28:30 +00:00
|
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|
phdr->rec_type = REC_TYPE_PACKET;
|
2013-05-16 23:42:10 +00:00
|
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|
phdr->presence_flags = WTAP_HAS_TS;
|
|
|
|
phdr->len = hdr.caplen;
|
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phdr->caplen = hdr.caplen;
|
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phdr->ts.secs = hdr.seconds;
|
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|
|
phdr->ts.nsecs = 0;
|
|
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|
|
2013-06-17 21:18:47 +00:00
|
|
|
if( !wtap_read_packet_bytes( fh, buf, phdr->caplen, err, err_info ) )
|
2002-03-05 08:40:27 +00:00
|
|
|
return FALSE;
|
2000-08-08 22:16:42 +00:00
|
|
|
|
2014-08-02 11:00:48 +00:00
|
|
|
pd = ws_buffer_start_ptr( buf );
|
2010-02-26 07:59:54 +00:00
|
|
|
if( csids->byteswapped ) {
|
2013-06-17 21:18:47 +00:00
|
|
|
if( phdr->caplen >= 2 ) {
|
2012-04-19 23:19:10 +00:00
|
|
|
PBSWAP16(pd); /* the ip len */
|
2013-06-17 21:18:47 +00:00
|
|
|
if( phdr->caplen >= 4 ) {
|
2012-04-19 23:19:10 +00:00
|
|
|
PBSWAP16(pd+2); /* ip id */
|
2013-06-17 21:18:47 +00:00
|
|
|
if( phdr->caplen >= 6 )
|
2012-04-19 23:19:10 +00:00
|
|
|
PBSWAP16(pd+4); /* ip flags and fragoff */
|
|
|
|
}
|
|
|
|
}
|
2000-08-08 22:16:42 +00:00
|
|
|
}
|
2002-08-28 20:30:45 +00:00
|
|
|
|
2002-03-05 08:40:27 +00:00
|
|
|
return TRUE;
|
2000-08-08 22:16:42 +00:00
|
|
|
}
|