forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
Use WTAP_MAX_PACKET_SIZE_STANDARD, set to 256KB, for everything except for D-Bus captures. Use WTAP_MAX_PACKET_SIZE_DBUS, set to 128MB, for them, because that's the largest possible D-Bus message size. See https://bugs.freedesktop.org/show_bug.cgi?id=100220 for an example of the problems caused by limiting the snapshot length to 256KB for D-Bus. Have a snapshot length of 0 in a capture_file structure mean "there is no snapshot length for the file"; we don't need the has_snap field in that case, a value of 0 mean "no, we don't have a snapshot length". In dumpcap, start out with a pipe buffer size of 2KB, and grow it as necessary. When checking for a too-big packet from a pipe, check against the appropriate maximum - 128MB for DLT_DBUS, 256KB for everything else. Change-Id: Ib2ce7a0cf37b971fbc0318024fd011e18add8b20 Reviewed-on: https://code.wireshark.org/review/21952 Petri-Dish: Guy Harris <guy@alum.mit.edu> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Guy Harris <guy@alum.mit.edu>
820 lines
28 KiB
C
820 lines
28 KiB
C
/* nettl.c
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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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* Enhancements by Mark C. Brown <mbrown@hp.com>
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* Copyright (C) 2003, 2005 Hewlett-Packard Development Company, L.P.
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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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#include "config.h"
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include "wtap-int.h"
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#include "file_wrappers.h"
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#include "nettl.h"
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/* HP nettl file header */
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/* Magic number size */
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#define MAGIC_SIZE 12
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/* HP-UX 9.x */
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static const guint8 nettl_magic_hpux9[MAGIC_SIZE] = {
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0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xD0, 0x00
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};
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/* HP-UX 10.x and 11.x */
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static const guint8 nettl_magic_hpux10[MAGIC_SIZE] = {
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0x54, 0x52, 0x00, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80
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};
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#define FILE_HDR_SIZE 128
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#define NETTL_FILENAME_SIZE 56
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struct nettl_file_hdr {
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guint8 magic[MAGIC_SIZE];
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gchar file_name[NETTL_FILENAME_SIZE];
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gchar tz[20];
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gchar host_name[9];
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gchar os_vers[9];
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guint8 os_v;
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guint8 xxa[8];
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gchar model[11];
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guint16 unknown; /* just padding to 128 bytes? */
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};
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/* HP nettl record header */
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/* see /usr/include/sys/netdiag1.h for hints */
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struct nettlrec_hdr {
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guint16 hdr_len;
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guint16 subsys;
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guint32 devid;
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guint8 xxa[4];
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guint32 kind;
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guint8 xxb[16];
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guint32 caplen;
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guint32 length;
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guint32 sec;
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guint32 usec;
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guint32 pid;
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guint8 xxc[10];
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guint16 uid;
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};
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/*
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* This is what we treat as the minimum size of a record header.
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* It is *not* necessarily the same as sizeof(struct nettlrec_hdr),
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* because it doesn't include any padding added to the structure.
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*/
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#define NETTL_REC_HDR_LEN 64
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/* HP nettl record header for the SX25L2 subsystem - The FCS is not included
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in the file. */
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struct nettlrec_sx25l2_hdr {
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guint8 xxa[8];
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guint8 from_dce;
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guint8 xxb[55];
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guint8 caplen[2];
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guint8 length[2];
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guint8 xxc[4];
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guint8 sec[4];
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guint8 usec[4];
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guint8 xxd[4];
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};
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/* NL_LS_DRIVER :
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The following shows what the header and subheader looks like for NS_LS_DRIVER
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The capture was taken on HPUX11 and for a 100baseT interface.
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000080 00 44 00 0b 00 00 00 02 00 00 00 00 20 00 00 00
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000090 00 00 00 00 00 00 04 06 00 00 00 00 00 00 00 00
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0000a0 00 00 00 74 00 00 00 74 3c e3 76 19 00 06 34 63
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0000b0 ff ff ff ff 00 00 00 00 00 00 00 00 ff ff ff ff
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0000c0 00 00 00 00 00 00 01 02 00 5c 00 5c ff ff ff ff
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0000d0 3c e3 76 19 00 06 34 5a 00 0b 00 14 <here starts the MAC header>
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Each entry starts with 0x0044000b
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The values 0x005c at position 0x0000c8 and 0x0000ca matches the number of
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bytes in the packet up to the next entry, which starts with 0x00440b again.
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These are the captured and real and captured length of the packet.
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The values 0x00000074 at positions 0x0000a0 and 0x0000a4 seems to indicate
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the same number as positions 0x0000c8 and 0x0000ca but added with 24.
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Perhaps we have here two layers of headers.
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The first layer is fixed and consists of all the bytes from 0x000084 up to and
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including 0x0000c3 which is a generic header for all packets captured from any
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device. This header might be of fixed size 64 bytes (although the first two
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bytes appear to be the length of that header, in big-endian format) and there
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might be something in it which indicates the type of the next header which is
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link type specific. Following this header there is another header for the
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100baseT interface which in this case is 24 bytes long spanning positions
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0x0000c4 to 0x0000db.
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In another capture, claimed to be taken on an HP-UX 8 box, but with a
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file header suggesting it was taken on HP-UX 10.20, the header for
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NS_LS_DRIVER looks like:
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000080 00 40 00 0b ff ff ff ff 00 00 00 00 00 00 00 00
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000090 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0000a0 00 00 00 51 00 00 00 51 42 02 5e bf 00 0e ab 7c
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0000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0000c0 00 02 01 00 00 3b 00 3b ff ff ff ff 42 02 5e bf
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0000d0 00 0e 8e 44 00 0b <here starts the MAC header>
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When someone reports that the loading of the captures breaks, we can
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compare this header above with what he/she got to learn how to
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distinguish between different types of link specific headers.
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For now, the subheader for 100baseT seems to be
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4-5 captured length
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6-7 actual length
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8-11 unknown
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12-15 secs
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16-19 usecs
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20-21 unknown
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*/
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struct nettlrec_ns_ls_drv_eth_hdr {
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guint8 xxa[4];
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guint8 caplen[2];
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guint8 length[2];
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guint8 xxb[4];
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guint8 sec[4];
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guint8 usec[4];
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guint8 xxc[2];
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};
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/*
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* This is the size of an NS_LS_DRV_ETH header; it is *not* necessarily
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* the same as sizeof(struct nettlrec_ns_ls_drv_eth_hdr), because it
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* doesn't include any padding added to the structure.
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*/
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#define NS_LS_DRV_ETH_HDR_LEN 22
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/* header is followed by data and once again the total length (2 bytes) ! */
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typedef struct {
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gboolean is_hpux_11;
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} nettl_t;
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static gboolean nettl_read(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset);
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static gboolean nettl_seek_read(wtap *wth, gint64 seek_off,
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struct wtap_pkthdr *phdr, Buffer *buf,
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int *err, gchar **err_info);
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static gboolean nettl_read_rec(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
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Buffer *buf, int *err, gchar **err_info);
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static gboolean nettl_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
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const guint8 *pd, int *err, gchar **err_info);
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wtap_open_return_val nettl_open(wtap *wth, int *err, gchar **err_info)
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{
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struct nettl_file_hdr file_hdr;
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guint16 dummy[2];
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int subsys;
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nettl_t *nettl;
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memset(&file_hdr, 0, sizeof(file_hdr));
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/* Read in the string that should be at the start of a HP file */
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if (!wtap_read_bytes(wth->fh, file_hdr.magic, MAGIC_SIZE, err, err_info)) {
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if (*err != WTAP_ERR_SHORT_READ)
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return WTAP_OPEN_ERROR;
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return WTAP_OPEN_NOT_MINE;
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}
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if (memcmp(file_hdr.magic, nettl_magic_hpux9, MAGIC_SIZE) &&
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memcmp(file_hdr.magic, nettl_magic_hpux10, MAGIC_SIZE)) {
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return WTAP_OPEN_NOT_MINE;
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}
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/* Read the rest of the file header */
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if (!wtap_read_bytes(wth->fh, file_hdr.file_name, FILE_HDR_SIZE - MAGIC_SIZE,
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err, err_info))
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return WTAP_OPEN_ERROR;
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/* This is an nettl file */
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_NETTL;
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nettl = g_new(nettl_t,1);
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wth->priv = (void *)nettl;
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if (file_hdr.os_vers[2] == '1' && file_hdr.os_vers[3] == '1')
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nettl->is_hpux_11 = TRUE;
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else
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nettl->is_hpux_11 = FALSE;
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wth->subtype_read = nettl_read;
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wth->subtype_seek_read = nettl_seek_read;
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wth->snapshot_length = 0; /* not available */
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/* read the first header to take a guess at the file encap */
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if (!wtap_read_bytes_or_eof(wth->fh, dummy, 4, err, err_info)) {
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if (*err == 0) {
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/* EOF, so no records */
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return WTAP_OPEN_NOT_MINE;
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}
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return WTAP_OPEN_ERROR;
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}
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subsys = g_ntohs(dummy[1]);
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switch (subsys) {
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case NETTL_SUBSYS_HPPB_FDDI :
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case NETTL_SUBSYS_EISA_FDDI :
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case NETTL_SUBSYS_PCI_FDDI :
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case NETTL_SUBSYS_HSC_FDDI :
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wth->file_encap = WTAP_ENCAP_NETTL_FDDI;
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break;
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case NETTL_SUBSYS_TOKEN :
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case NETTL_SUBSYS_PCI_TR :
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wth->file_encap = WTAP_ENCAP_NETTL_TOKEN_RING;
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break;
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case NETTL_SUBSYS_NS_LS_IP :
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case NETTL_SUBSYS_NS_LS_LOOPBACK :
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case NETTL_SUBSYS_NS_LS_TCP :
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case NETTL_SUBSYS_NS_LS_UDP :
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case NETTL_SUBSYS_NS_LS_IPV6 :
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wth->file_encap = WTAP_ENCAP_NETTL_RAW_IP;
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break;
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case NETTL_SUBSYS_NS_LS_ICMP :
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wth->file_encap = WTAP_ENCAP_NETTL_RAW_ICMP;
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break;
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case NETTL_SUBSYS_NS_LS_ICMPV6 :
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wth->file_encap = WTAP_ENCAP_NETTL_RAW_ICMPV6;
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break;
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case NETTL_SUBSYS_NS_LS_TELNET :
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wth->file_encap = WTAP_ENCAP_NETTL_RAW_TELNET;
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break;
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default:
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/* If this assumption is bad, the read will catch it */
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wth->file_encap = WTAP_ENCAP_NETTL_ETHERNET;
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}
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if (file_seek(wth->fh, FILE_HDR_SIZE, SEEK_SET, err) == -1) {
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return WTAP_OPEN_ERROR;
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}
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wth->file_tsprec = WTAP_TSPREC_USEC;
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return WTAP_OPEN_MINE;
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}
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/* Read the next packet */
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static gboolean nettl_read(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset)
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{
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/* Read record. */
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*data_offset = file_tell(wth->fh);
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if (!nettl_read_rec(wth, wth->fh, &wth->phdr, wth->frame_buffer,
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err, err_info)) {
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/* Read error or EOF */
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return FALSE;
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}
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/*
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* If the per-file encapsulation isn't known, set it to this
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* packet's encapsulation.
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*
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* If it *is* known, and it isn't this packet's encapsulation,
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* set it to WTAP_ENCAP_PER_PACKET, as this file doesn't
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* have a single encapsulation for all packets in the file.
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*/
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if (wth->file_encap == WTAP_ENCAP_UNKNOWN)
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wth->file_encap = wth->phdr.pkt_encap;
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else {
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if (wth->file_encap != wth->phdr.pkt_encap)
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wth->file_encap = WTAP_ENCAP_PER_PACKET;
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}
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return TRUE;
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}
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static gboolean
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nettl_seek_read(wtap *wth, gint64 seek_off, struct wtap_pkthdr *phdr,
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Buffer *buf, int *err, gchar **err_info)
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{
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if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
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return FALSE;
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/* Read record. */
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if (!nettl_read_rec(wth, wth->random_fh, phdr, buf, err, err_info)) {
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/* Read error or EOF */
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if (*err == 0) {
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/* EOF means "short read" in random-access mode */
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*err = WTAP_ERR_SHORT_READ;
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}
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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nettl_read_rec(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf,
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int *err, gchar **err_info)
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{
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union wtap_pseudo_header *pseudo_header = &phdr->pseudo_header;
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nettl_t *nettl = (nettl_t *)wth->priv;
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gboolean fddihack = FALSE;
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struct nettlrec_hdr rec_hdr;
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guint16 hdr_len;
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struct nettlrec_ns_ls_drv_eth_hdr drv_eth_hdr;
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guint32 length, caplen;
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int subsys;
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guint padlen;
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int datalen;
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guint8 dummyc[16];
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int bytes_to_read;
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guint8 *pd;
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if (!wtap_read_bytes_or_eof(fh, &rec_hdr.hdr_len, sizeof rec_hdr.hdr_len,
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err, err_info))
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return FALSE;
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hdr_len = g_ntohs(rec_hdr.hdr_len);
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if (hdr_len < NETTL_REC_HDR_LEN) {
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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("nettl: record header length %u too short",
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hdr_len);
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return FALSE;
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}
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if (!wtap_read_bytes(fh, &rec_hdr.subsys, NETTL_REC_HDR_LEN - 2,
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err, err_info))
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return FALSE;
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subsys = g_ntohs(rec_hdr.subsys);
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hdr_len -= NETTL_REC_HDR_LEN;
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/* Skip the rest of the header. */
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if (!wtap_read_bytes(fh, NULL, hdr_len, err, err_info))
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return FALSE;
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if ( (pntoh32(&rec_hdr.kind) & NETTL_HDR_PDU_MASK) == 0 ) {
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/* not actually a data packet (PDU) trace record */
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phdr->pkt_encap = WTAP_ENCAP_NETTL_RAW_IP;
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length = pntoh32(&rec_hdr.length);
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caplen = pntoh32(&rec_hdr.caplen);
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padlen = 0;
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} else switch (subsys) {
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case NETTL_SUBSYS_LAN100 :
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case NETTL_SUBSYS_EISA100BT :
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case NETTL_SUBSYS_BASE100 :
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case NETTL_SUBSYS_GSC100BT :
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case NETTL_SUBSYS_PCI100BT :
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case NETTL_SUBSYS_SPP100BT :
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case NETTL_SUBSYS_100VG :
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case NETTL_SUBSYS_GELAN :
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case NETTL_SUBSYS_BTLAN :
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case NETTL_SUBSYS_INTL100 :
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case NETTL_SUBSYS_IGELAN :
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case NETTL_SUBSYS_IETHER :
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case NETTL_SUBSYS_IXGBE :
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case NETTL_SUBSYS_HSSN :
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case NETTL_SUBSYS_IGSSN :
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case NETTL_SUBSYS_ICXGBE :
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case NETTL_SUBSYS_IEXGBE :
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case NETTL_SUBSYS_IOCXGBE :
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case NETTL_SUBSYS_IQXGBE :
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case NETTL_SUBSYS_HPPB_FDDI :
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case NETTL_SUBSYS_EISA_FDDI :
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case NETTL_SUBSYS_PCI_FDDI :
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case NETTL_SUBSYS_HSC_FDDI :
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case NETTL_SUBSYS_TOKEN :
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case NETTL_SUBSYS_PCI_TR :
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case NETTL_SUBSYS_NS_LS_IP :
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case NETTL_SUBSYS_NS_LS_LOOPBACK :
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case NETTL_SUBSYS_NS_LS_TCP :
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case NETTL_SUBSYS_NS_LS_UDP :
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case NETTL_SUBSYS_HP_APAPORT :
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case NETTL_SUBSYS_HP_APALACP :
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case NETTL_SUBSYS_NS_LS_IPV6 :
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case NETTL_SUBSYS_NS_LS_ICMPV6 :
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case NETTL_SUBSYS_NS_LS_ICMP :
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case NETTL_SUBSYS_NS_LS_TELNET :
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case NETTL_SUBSYS_NS_LS_SCTP :
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if( (subsys == NETTL_SUBSYS_NS_LS_IP)
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|| (subsys == NETTL_SUBSYS_NS_LS_LOOPBACK)
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|| (subsys == NETTL_SUBSYS_NS_LS_UDP)
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|| (subsys == NETTL_SUBSYS_NS_LS_TCP)
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|| (subsys == NETTL_SUBSYS_NS_LS_SCTP)
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|| (subsys == NETTL_SUBSYS_NS_LS_IPV6)) {
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phdr->pkt_encap = WTAP_ENCAP_NETTL_RAW_IP;
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} else if (subsys == NETTL_SUBSYS_NS_LS_ICMP) {
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phdr->pkt_encap = WTAP_ENCAP_NETTL_RAW_ICMP;
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} else if (subsys == NETTL_SUBSYS_NS_LS_ICMPV6) {
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phdr->pkt_encap = WTAP_ENCAP_NETTL_RAW_ICMPV6;
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} else if (subsys == NETTL_SUBSYS_NS_LS_TELNET) {
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phdr->pkt_encap = WTAP_ENCAP_NETTL_RAW_TELNET;
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} else if( (subsys == NETTL_SUBSYS_HPPB_FDDI)
|
|
|| (subsys == NETTL_SUBSYS_EISA_FDDI)
|
|
|| (subsys == NETTL_SUBSYS_PCI_FDDI)
|
|
|| (subsys == NETTL_SUBSYS_HSC_FDDI) ) {
|
|
phdr->pkt_encap = WTAP_ENCAP_NETTL_FDDI;
|
|
} else if( (subsys == NETTL_SUBSYS_PCI_TR)
|
|
|| (subsys == NETTL_SUBSYS_TOKEN) ) {
|
|
phdr->pkt_encap = WTAP_ENCAP_NETTL_TOKEN_RING;
|
|
} else {
|
|
phdr->pkt_encap = WTAP_ENCAP_NETTL_ETHERNET;
|
|
}
|
|
|
|
length = pntoh32(&rec_hdr.length);
|
|
caplen = pntoh32(&rec_hdr.caplen);
|
|
|
|
/* HPPB FDDI has different inbound vs outbound trace records */
|
|
if (subsys == NETTL_SUBSYS_HPPB_FDDI) {
|
|
if (pntoh32(&rec_hdr.kind) == NETTL_HDR_PDUIN) {
|
|
/* inbound is very strange...
|
|
there are an extra 3 bytes after the DSAP and SSAP
|
|
for SNAP frames ???
|
|
*/
|
|
fddihack=TRUE;
|
|
padlen = 0;
|
|
} else {
|
|
/* outbound appears to have variable padding */
|
|
if (!wtap_read_bytes(fh, dummyc, 9, err, err_info))
|
|
return FALSE;
|
|
/* padding is usually either a total 11 or 16 bytes??? */
|
|
padlen = (int)dummyc[8];
|
|
if (!wtap_read_bytes(fh, NULL, padlen, err, err_info))
|
|
return FALSE;
|
|
padlen += 9;
|
|
}
|
|
} else if ( (subsys == NETTL_SUBSYS_PCI_FDDI)
|
|
|| (subsys == NETTL_SUBSYS_EISA_FDDI)
|
|
|| (subsys == NETTL_SUBSYS_HSC_FDDI) ) {
|
|
/* other flavor FDDI cards have an extra 3 bytes of padding */
|
|
if (!wtap_read_bytes(fh, NULL, 3, err, err_info))
|
|
return FALSE;
|
|
padlen = 3;
|
|
} else if (subsys == NETTL_SUBSYS_NS_LS_LOOPBACK) {
|
|
/* LOOPBACK has an extra 26 bytes of padding */
|
|
if (!wtap_read_bytes(fh, NULL, 26, err, err_info))
|
|
return FALSE;
|
|
padlen = 26;
|
|
} else if (subsys == NETTL_SUBSYS_NS_LS_SCTP) {
|
|
/*
|
|
* SCTP 8 byte header that we will ignore...
|
|
* 32 bit integer defines format
|
|
* 1 = Log
|
|
* 2 = ASCII
|
|
* 3 = Binary (PDUs should be Binary format)
|
|
* 32 bit integer defines type
|
|
* 1 = Inbound
|
|
* 2 = Outbound
|
|
*/
|
|
if (!wtap_read_bytes(fh, NULL, 8, err, err_info))
|
|
return FALSE;
|
|
padlen = 8;
|
|
} else {
|
|
padlen = 0;
|
|
}
|
|
break;
|
|
|
|
case NETTL_SUBSYS_NS_LS_DRIVER :
|
|
/* XXX we don't know how to identify this as ethernet frames, so
|
|
we assume everything is. We will crash and burn for anything else */
|
|
/* for encapsulated 100baseT we do this */
|
|
phdr->pkt_encap = WTAP_ENCAP_NETTL_ETHERNET;
|
|
if (!wtap_read_bytes(fh, &drv_eth_hdr, NS_LS_DRV_ETH_HDR_LEN,
|
|
err, err_info))
|
|
return FALSE;
|
|
|
|
length = pntoh16(&drv_eth_hdr.length);
|
|
caplen = pntoh16(&drv_eth_hdr.caplen);
|
|
/*
|
|
* XXX - is there a length field that would give the length
|
|
* of this header, so that we don't have to check for
|
|
* nettl files from HP-UX 11?
|
|
*
|
|
* And what are the extra two bytes?
|
|
*/
|
|
if (nettl->is_hpux_11) {
|
|
if (!wtap_read_bytes(fh, NULL, 2, err, err_info))
|
|
return FALSE;
|
|
}
|
|
padlen = 0;
|
|
break;
|
|
|
|
case NETTL_SUBSYS_SX25L2:
|
|
case NETTL_SUBSYS_SX25L3:
|
|
/*
|
|
* XXX - is the 24-byte padding actually a header with
|
|
* packet lengths, time stamps, etc., just as is the case
|
|
* for NETTL_SUBSYS_NS_LS_DRIVER? It might be
|
|
*
|
|
* guint8 caplen[2];
|
|
* guint8 length[2];
|
|
* guint8 xxc[4];
|
|
* guint8 sec[4];
|
|
* guint8 usec[4];
|
|
* guint8 xxd[4];
|
|
*
|
|
* or something such as that - if it has 4 bytes before that
|
|
* (making it 24 bytes), it'd be like struct
|
|
* nettlrec_ns_ls_drv_eth_hdr but with 2 more bytes at the end.
|
|
*
|
|
* And is "from_dce" at xxa[0] in the nettlrec_hdr structure?
|
|
*/
|
|
phdr->pkt_encap = WTAP_ENCAP_NETTL_X25;
|
|
length = pntoh32(&rec_hdr.length);
|
|
caplen = pntoh32(&rec_hdr.caplen);
|
|
padlen = 24; /* sizeof (struct nettlrec_sx25l2_hdr) - NETTL_REC_HDR_LEN + 4 */
|
|
if (!wtap_read_bytes(fh, NULL, padlen, err, err_info))
|
|
return FALSE;
|
|
break;
|
|
|
|
default:
|
|
/* We're going to assume it's ethernet if we don't recognize the
|
|
subsystem -- We'll probably spew junks and core if it isn't... */
|
|
wth->file_encap = WTAP_ENCAP_PER_PACKET;
|
|
phdr->pkt_encap = WTAP_ENCAP_NETTL_ETHERNET;
|
|
length = pntoh32(&rec_hdr.length);
|
|
caplen = pntoh32(&rec_hdr.caplen);
|
|
padlen = 0;
|
|
break;
|
|
}
|
|
|
|
if (length < padlen) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("nettl: packet length %u in record header too short, less than %u",
|
|
length, padlen);
|
|
return FALSE;
|
|
}
|
|
phdr->rec_type = REC_TYPE_PACKET;
|
|
phdr->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN;
|
|
phdr->len = length - padlen;
|
|
if (caplen < padlen) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("nettl: captured length %u in record header too short, less than %u",
|
|
caplen, padlen);
|
|
return FALSE;
|
|
}
|
|
datalen = caplen - padlen;
|
|
phdr->caplen = datalen;
|
|
phdr->ts.secs = pntoh32(&rec_hdr.sec);
|
|
phdr->ts.nsecs = pntoh32(&rec_hdr.usec) * 1000;
|
|
|
|
pseudo_header->nettl.subsys = subsys;
|
|
pseudo_header->nettl.devid = pntoh32(&rec_hdr.devid);
|
|
pseudo_header->nettl.kind = pntoh32(&rec_hdr.kind);
|
|
pseudo_header->nettl.pid = pntoh32(&rec_hdr.pid);
|
|
pseudo_header->nettl.uid = pntoh16(&rec_hdr.uid);
|
|
|
|
if (phdr->caplen > WTAP_MAX_PACKET_SIZE_STANDARD) {
|
|
/*
|
|
* Probably a corrupt capture file; don't blow up trying
|
|
* to allocate space for an immensely-large packet.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("nettl: File has %u-byte packet, bigger than maximum of %u",
|
|
phdr->caplen, WTAP_MAX_PACKET_SIZE_STANDARD);
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* Read the packet data.
|
|
*/
|
|
ws_buffer_assure_space(buf, datalen);
|
|
pd = ws_buffer_start_ptr(buf);
|
|
if (fddihack) {
|
|
/* read in FC, dest, src, DSAP and SSAP */
|
|
bytes_to_read = 15;
|
|
if (bytes_to_read > datalen)
|
|
bytes_to_read = datalen;
|
|
if (!wtap_read_bytes(fh, pd, bytes_to_read, err, err_info))
|
|
return FALSE;
|
|
datalen -= bytes_to_read;
|
|
if (datalen == 0) {
|
|
/* There's nothing past the FC, dest, src, DSAP and SSAP */
|
|
return TRUE;
|
|
}
|
|
if (pd[13] == 0xAA) {
|
|
/* it's SNAP, have to eat 3 bytes??? */
|
|
bytes_to_read = 3;
|
|
if (bytes_to_read > datalen)
|
|
bytes_to_read = datalen;
|
|
if (!wtap_read_bytes(fh, NULL, bytes_to_read, err, err_info))
|
|
return FALSE;
|
|
datalen -= bytes_to_read;
|
|
if (datalen == 0) {
|
|
/* There's nothing past the FC, dest, src, DSAP, SSAP, and 3 bytes to eat */
|
|
return TRUE;
|
|
}
|
|
}
|
|
if (!wtap_read_bytes(fh, pd + 15, datalen, err, err_info))
|
|
return FALSE;
|
|
} else {
|
|
if (!wtap_read_bytes(fh, pd, datalen, err, err_info))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Returns 0 if we could write the specified encapsulation type,
|
|
an error indication otherwise. nettl files are WTAP_ENCAP_UNKNOWN
|
|
when they are first opened, so we allow that for tshark read/write.
|
|
*/
|
|
|
|
int nettl_dump_can_write_encap(int encap)
|
|
{
|
|
|
|
switch (encap) {
|
|
case WTAP_ENCAP_ETHERNET:
|
|
case WTAP_ENCAP_FDDI_BITSWAPPED:
|
|
case WTAP_ENCAP_TOKEN_RING:
|
|
case WTAP_ENCAP_NETTL_ETHERNET:
|
|
case WTAP_ENCAP_NETTL_FDDI:
|
|
case WTAP_ENCAP_NETTL_TOKEN_RING:
|
|
case WTAP_ENCAP_NETTL_RAW_IP:
|
|
case WTAP_ENCAP_NETTL_RAW_ICMP:
|
|
case WTAP_ENCAP_NETTL_RAW_ICMPV6:
|
|
case WTAP_ENCAP_NETTL_RAW_TELNET:
|
|
/*
|
|
case WTAP_ENCAP_NETTL_X25:
|
|
*/
|
|
case WTAP_ENCAP_PER_PACKET:
|
|
case WTAP_ENCAP_UNKNOWN:
|
|
case WTAP_ENCAP_NETTL_UNKNOWN:
|
|
return 0;
|
|
default:
|
|
return WTAP_ERR_UNWRITABLE_ENCAP;
|
|
}
|
|
}
|
|
|
|
|
|
/* Returns TRUE on success, FALSE on failure;
|
|
sets "*err" to an error code on failure */
|
|
gboolean nettl_dump_open(wtap_dumper *wdh, int *err)
|
|
{
|
|
struct nettl_file_hdr file_hdr;
|
|
|
|
/* This is a nettl file */
|
|
wdh->subtype_write = nettl_dump;
|
|
|
|
/* Write the file header. */
|
|
memset(&file_hdr,0,sizeof(file_hdr));
|
|
memcpy(file_hdr.magic,nettl_magic_hpux10,sizeof(file_hdr.magic));
|
|
g_strlcpy(file_hdr.file_name,"/tmp/wireshark.TRC000",NETTL_FILENAME_SIZE);
|
|
g_strlcpy(file_hdr.tz,"UTC",20);
|
|
g_strlcpy(file_hdr.host_name,"",9);
|
|
g_strlcpy(file_hdr.os_vers,"B.11.11",9);
|
|
file_hdr.os_v=0x55;
|
|
g_strlcpy(file_hdr.model,"9000/800",11);
|
|
file_hdr.unknown=g_htons(0x406);
|
|
if (!wtap_dump_file_write(wdh, &file_hdr, sizeof file_hdr, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof(file_hdr);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Write a record for a packet to a dump file.
|
|
Returns TRUE on success, FALSE on failure. */
|
|
static gboolean nettl_dump(wtap_dumper *wdh,
|
|
const struct wtap_pkthdr *phdr,
|
|
const guint8 *pd, int *err, gchar **err_info _U_)
|
|
{
|
|
const union wtap_pseudo_header *pseudo_header = &phdr->pseudo_header;
|
|
struct nettlrec_hdr rec_hdr;
|
|
guint8 dummyc[24];
|
|
|
|
/* We can only write packet records. */
|
|
if (phdr->rec_type != REC_TYPE_PACKET) {
|
|
*err = WTAP_ERR_UNWRITABLE_REC_TYPE;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Don't write anything we're not willing to read. */
|
|
if (phdr->caplen > WTAP_MAX_PACKET_SIZE_STANDARD) {
|
|
*err = WTAP_ERR_PACKET_TOO_LARGE;
|
|
return FALSE;
|
|
}
|
|
|
|
memset(&rec_hdr,0,sizeof(rec_hdr));
|
|
/* HP-UX 11.X header should be 68 bytes */
|
|
rec_hdr.hdr_len = g_htons(sizeof(rec_hdr) + 4);
|
|
rec_hdr.kind = g_htonl(NETTL_HDR_PDUIN);
|
|
rec_hdr.sec = g_htonl(phdr->ts.secs);
|
|
rec_hdr.usec = g_htonl(phdr->ts.nsecs/1000);
|
|
rec_hdr.caplen = g_htonl(phdr->caplen);
|
|
rec_hdr.length = g_htonl(phdr->len);
|
|
rec_hdr.devid = -1;
|
|
rec_hdr.pid = -1;
|
|
rec_hdr.uid = -1;
|
|
|
|
switch (phdr->pkt_encap) {
|
|
|
|
case WTAP_ENCAP_NETTL_FDDI:
|
|
/* account for pad bytes */
|
|
rec_hdr.caplen = g_htonl(phdr->caplen + 3);
|
|
rec_hdr.length = g_htonl(phdr->len + 3);
|
|
/* fall through and fill the rest of the fields */
|
|
/* FALL THROUGH */
|
|
case WTAP_ENCAP_NETTL_ETHERNET:
|
|
case WTAP_ENCAP_NETTL_TOKEN_RING:
|
|
case WTAP_ENCAP_NETTL_RAW_IP:
|
|
case WTAP_ENCAP_NETTL_RAW_ICMP:
|
|
case WTAP_ENCAP_NETTL_RAW_ICMPV6:
|
|
case WTAP_ENCAP_NETTL_RAW_TELNET:
|
|
case WTAP_ENCAP_NETTL_UNKNOWN:
|
|
rec_hdr.subsys = g_htons(pseudo_header->nettl.subsys);
|
|
rec_hdr.devid = g_htonl(pseudo_header->nettl.devid);
|
|
rec_hdr.kind = g_htonl(pseudo_header->nettl.kind);
|
|
rec_hdr.pid = g_htonl(pseudo_header->nettl.pid);
|
|
rec_hdr.uid = g_htons(pseudo_header->nettl.uid);
|
|
break;
|
|
|
|
case WTAP_ENCAP_RAW_IP:
|
|
rec_hdr.subsys = g_htons(NETTL_SUBSYS_NS_LS_IP);
|
|
break;
|
|
|
|
case WTAP_ENCAP_ETHERNET:
|
|
rec_hdr.subsys = g_htons(NETTL_SUBSYS_BTLAN);
|
|
break;
|
|
|
|
case WTAP_ENCAP_FDDI_BITSWAPPED:
|
|
rec_hdr.subsys = g_htons(NETTL_SUBSYS_PCI_FDDI);
|
|
/* account for pad bytes */
|
|
rec_hdr.caplen = g_htonl(phdr->caplen + 3);
|
|
rec_hdr.length = g_htonl(phdr->len + 3);
|
|
break;
|
|
|
|
case WTAP_ENCAP_TOKEN_RING:
|
|
rec_hdr.subsys = g_htons(NETTL_SUBSYS_PCI_TR);
|
|
break;
|
|
#if 0
|
|
case WTAP_ENCAP_NETTL_X25:
|
|
rec_hdr.caplen = g_htonl(phdr->caplen + 24);
|
|
rec_hdr.length = g_htonl(phdr->len + 24);
|
|
rec_hdr.subsys = g_htons(pseudo_header->nettl.subsys);
|
|
rec_hdr.devid = g_htonl(pseudo_header->nettl.devid);
|
|
rec_hdr.kind = g_htonl(pseudo_header->nettl.kind);
|
|
rec_hdr.pid = g_htonl(pseudo_header->nettl.pid);
|
|
rec_hdr.uid = g_htons(pseudo_header->nettl.uid);
|
|
break;
|
|
#endif
|
|
default:
|
|
/* found one we don't support */
|
|
*err = WTAP_ERR_UNWRITABLE_ENCAP;
|
|
return FALSE;
|
|
}
|
|
|
|
if (!wtap_dump_file_write(wdh, &rec_hdr, sizeof(rec_hdr), err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof(rec_hdr);
|
|
|
|
/* Write out 4 extra bytes of unknown stuff for HP-UX11
|
|
* header format.
|
|
*/
|
|
memset(dummyc, 0, sizeof dummyc);
|
|
if (!wtap_dump_file_write(wdh, dummyc, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
|
|
if ((phdr->pkt_encap == WTAP_ENCAP_FDDI_BITSWAPPED) ||
|
|
(phdr->pkt_encap == WTAP_ENCAP_NETTL_FDDI)) {
|
|
/* add those weird 3 bytes of padding */
|
|
if (!wtap_dump_file_write(wdh, dummyc, 3, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 3;
|
|
}
|
|
/*
|
|
} else if (phdr->pkt_encap == WTAP_ENCAP_NETTL_X25) {
|
|
if (!wtap_dump_file_write(wdh, dummyc, 24, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 24;
|
|
}
|
|
*/
|
|
|
|
/* write actual PDU data */
|
|
|
|
if (!wtap_dump_file_write(wdh, pd, phdr->caplen, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += phdr->caplen;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|