1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/* packetlogger.c
* Routines for opening Apple's (Bluetooth) PacketLogger file format captures
* Copyright 2008-2009, Stephen Fisher (see AUTHORS file)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Based on commview.c, Linux's BlueZ-Gnome Analyzer program and hexdumps of
* the output files from Apple's PacketLogger tool.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include "config.h"
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "wtap.h"
#include "wftap-int.h"
#include "wtap-int.h"
#include "buffer.h"
#include "file_wrappers.h"
#include "packetlogger.h"
typedef struct packetlogger_header {
guint32 len;
guint64 ts;
} packetlogger_header_t;
static gboolean packetlogger_read(wftap *wfth, int *err, gchar **err_info,
gint64 *data_offset);
static gboolean packetlogger_seek_read(wftap *wfth, gint64 seek_off,
void* header,
Buffer *buf, int *err, gchar **err_info);
static gboolean packetlogger_read_header(packetlogger_header_t *pl_hdr,
FILE_T fh, int *err, gchar **err_info);
static gboolean packetlogger_read_packet(FILE_T fh, struct wtap_pkthdr *phdr,
Buffer *buf, int *err,
gchar **err_info);
int packetlogger_open(wftap *wfth, int *err, gchar **err_info)
{
packetlogger_header_t pl_hdr;
guint8 type;
if(!packetlogger_read_header(&pl_hdr, wfth->fh, err, err_info)) {
if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
return -1;
return 0;
}
if (file_read(&type, 1, wfth->fh) <= 0) {
*err = file_error(wfth->fh, err_info);
if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
return -1;
return 0;
}
/* Verify this file belongs to us */
if (!((8 <= pl_hdr.len) && (pl_hdr.len < 65536) &&
(type < 0x04 || type == 0xFB || type == 0xFC || type == 0xFE || type == 0xFF)))
return 0;
/* No file header. Reset the fh to 0 so we can read the first packet */
if (file_seek(wfth->fh, 0, SEEK_SET, err) == -1)
return -1;
/* Set up the pointers to the handlers for this file type */
wfth->subtype_read = packetlogger_read;
wfth->subtype_seek_read = packetlogger_seek_read;
wfth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PACKETLOGGER;
wfth->file_encap = WTAP_ENCAP_PACKETLOGGER;
wfth->tsprecision = WTAP_FILE_TSPREC_USEC;
return 1; /* Our kind of file */
}
static gboolean
packetlogger_read(wftap *wfth, int *err, gchar **err_info, gint64 *data_offset)
{
wtap* wth = (wtap*)wfth->tap_specific_data;
*data_offset = file_tell(wfth->fh);
return packetlogger_read_packet(wfth->fh, &wth->phdr,
wfth->frame_buffer, err, err_info);
}
static gboolean
packetlogger_seek_read(wftap *wfth, gint64 seek_off, void* header,
Buffer *buf, int *err, gchar **err_info)
{
struct wtap_pkthdr *phdr = (struct wtap_pkthdr *)header;
if(file_seek(wfth->random_fh, seek_off, SEEK_SET, err) == -1)
return FALSE;
if(!packetlogger_read_packet(wfth->random_fh, phdr, buf, err, err_info)) {
if(*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
return TRUE;
}
static gboolean
packetlogger_read_header(packetlogger_header_t *pl_hdr, FILE_T fh, int *err,
gchar **err_info)
{
wtap_file_read_expected_bytes(&pl_hdr->len, 4, fh, err, err_info);
wtap_file_read_expected_bytes(&pl_hdr->ts, 8, fh, err, err_info);
/* Convert multi-byte values from big endian to host endian */
pl_hdr->len = GUINT32_FROM_BE(pl_hdr->len);
pl_hdr->ts = GUINT64_FROM_BE(pl_hdr->ts);
return TRUE;
}
static gboolean
packetlogger_read_packet(FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf,
int *err, gchar **err_info)
{
packetlogger_header_t pl_hdr;
if(!packetlogger_read_header(&pl_hdr, fh, err, err_info))
return FALSE;
if (pl_hdr.len < 8) {
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("packetlogger: record length %u is too small", pl_hdr.len);
return FALSE;
}
if (pl_hdr.len - 8 > WTAP_MAX_PACKET_SIZE) {
/*
* 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("packetlogger: File has %u-byte packet, bigger than maximum of %u",
pl_hdr.len - 8, WTAP_MAX_PACKET_SIZE);
return FALSE;
}
phdr->presence_flags = WTAP_HAS_TS;
phdr->len = pl_hdr.len - 8;
phdr->caplen = pl_hdr.len - 8;
phdr->ts.secs = (time_t) (pl_hdr.ts >> 32);
phdr->ts.nsecs = (int)((pl_hdr.ts & 0xFFFFFFFF) * 1000);
return wtap_read_packet_bytes(fh, buf, phdr->caplen, err, err_info);
}
|
