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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* Routines for parsing an ipacces SDP firmware file */
/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
* All Rights Reserved
*
* 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 <openbsc/debug.h>
#include <openbsc/ipaccess.h>
#include <openbsc/talloc.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define PART_LENGTH 138
static_assert(sizeof(struct sdp_header_entry) == 138, right_entry);
static_assert(sizeof(struct sdp_firmware) == 160, _right_header_length);
/* more magic, the second "int" in the header */
static char more_magic[] = { 0x10, 0x02 };
/* talloc context */
void *tall_firm_ctx;
int ipacces_analyze_file(int fd, const unsigned int st_size, const unsigned int base_offset, struct llist_head *list)
{
struct sdp_firmware *firmware_header = 0;
struct sdp_header *header;
char buf[4096];
int rc, i;
rc = read(fd, buf, sizeof(*firmware_header));
if (rc < 0) {
perror("Can not read header start.");
return -1;
}
firmware_header = (struct sdp_firmware *) &buf[0];
if (strncmp(firmware_header->magic, " SDP", 4) != 0) {
fprintf(stderr, "Wrong magic.\n");
return -1;
}
if (memcmp(firmware_header->more_magic, more_magic, 2) != 0) {
fprintf(stderr, "Wrong more magic. Got: 0x%x %x %x %x\n",
firmware_header->more_magic[0] & 0xff, firmware_header->more_magic[1] & 0xff,
firmware_header->more_magic[2] & 0xff, firmware_header->more_magic[3] & 0xff);
return -1;
}
if (!firmware_header)
return -1;
if (ntohl(firmware_header->file_length) != st_size) {
fprintf(stderr, "The filesize and the header do not match.\n");
return -1;
}
/* add the firmware */
header = talloc_zero(list, struct sdp_header);
header->firmware_info = *firmware_header;
INIT_LLIST_HEAD(&header->header_list);
llist_add(&header->entry, list);
/* this semantic appears to be only the case for 0x0000 */
if (firmware_header->more_more_magic != 0)
return -1;
if (ntohs(firmware_header->part_length) % PART_LENGTH != 0) {
fprintf(stderr, "The part length seems to be wrong.\n");
return -1;
}
/* look into each firmware now */
for (i = 0; i < ntohs(firmware_header->part_length) / PART_LENGTH; ++i) {
struct sdp_header_entry entry;
struct sdp_header_item *header_entry;
unsigned int offset = base_offset + sizeof(struct sdp_firmware);
offset += i * 138;
if (lseek(fd, offset, SEEK_SET) != offset) {
fprintf(stderr, "Can not seek to the offset: %u.\n", offset);
return -1;
}
rc = read(fd, &entry, sizeof(entry));
if (rc != sizeof(entry)) {
fprintf(stderr, "Can not read the header entry.\n");
return -1;
}
/* now we need to find the SDP file... */
offset = ntohl(entry.start) + 4 + base_offset;
if (lseek(fd, offset, SEEK_SET) != offset) {
perror("can't seek to sdp");
return -1;
}
header_entry = talloc_zero(header, struct sdp_header_item);
header_entry->header_entry = entry;
llist_add(&header_entry->entry, &header->header_list);
ipacces_analyze_file(fd, ntohl(entry.length), offset, list);
}
return 0;
}
int main(int argc, char** argv)
{
int i, fd;
struct stat stat;
for (i = 1; i < argc; ++i) {
struct sdp_header *header;
struct sdp_header_item *sub_entry;
struct llist_head *entry;
entry = talloc_zero(tall_firm_ctx, struct llist_head);
INIT_LLIST_HEAD(entry);
printf("Opening possible firmware '%s'\n", argv[i]);
fd = open(argv[i], O_RDONLY);
if (!fd) {
perror("nada");
continue;
}
/* verify the file */
if (fstat(fd, &stat) == -1) {
perror("Can not stat the file");
return EXIT_FAILURE;
}
ipacces_analyze_file(fd, stat.st_size, 0, entry);
llist_for_each_entry(header, entry, entry) {
printf("Printing header information:\n");
printf("more_more_magic: 0x%x\n", ntohs(header->firmware_info.more_more_magic));
printf("header_length: %u\n", ntohl(header->firmware_info.header_length));
printf("file_length: %u\n", ntohl(header->firmware_info.file_length));
printf("sw_part: %.20s\n", header->firmware_info.sw_part);
printf("text1: %.64s\n", header->firmware_info.text1);
printf("time: %.12s\n", header->firmware_info.time);
printf("date: %.14s\n", header->firmware_info.date);
printf("text2: %.10s\n", header->firmware_info.text2);
printf("version: %.20s\n", header->firmware_info.version);
printf("subitems...\n");
llist_for_each_entry(sub_entry, &header->header_list, entry) {
printf("\tsomething1: %u\n", sub_entry->header_entry.something1);
printf("\ttext1: %.64s\n", sub_entry->header_entry.text1);
printf("\ttime: %.12s\n", sub_entry->header_entry.time);
printf("\tdate: %.14s\n", sub_entry->header_entry.date);
printf("\ttext2: %.10s\n", sub_entry->header_entry.text2);
printf("\tversion: %.20s\n", sub_entry->header_entry.version);
printf("\tlength: %u\n", ntohl(sub_entry->header_entry.length));
printf("\taddr1: 0x%x\n", ntohl(sub_entry->header_entry.addr1));
printf("\taddr2: 0x%x\n", ntohl(sub_entry->header_entry.addr2));
printf("\tstart: 0x%x\n", ntohl(sub_entry->header_entry.start));
printf("\n\n");
}
printf("\n\n");
}
talloc_free(entry);
}
return EXIT_SUCCESS;
}
|
