Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 1 | /* Routines for parsing an ipacces SDP firmware file */ |
| 2 | |
| 3 | /* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | */ |
| 21 | |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 22 | #include <openbsc/debug.h> |
| 23 | |
Holger Hans Peter Freyther | bf2bdc6 | 2009-12-23 13:09:27 +0100 | [diff] [blame] | 24 | #include <arpa/inet.h> |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 25 | #include <sys/types.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <unistd.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | |
Holger Hans Peter Freyther | 46a920c | 2009-12-29 05:43:57 +0100 | [diff] [blame] | 33 | #define PART_LENGTH 138 |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 34 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 35 | struct sdp_firmware_start { |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 36 | char magic[4]; |
| 37 | char more_magic[4]; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 38 | } __attribute__((packed)); |
| 39 | |
| 40 | struct sdp_firmware { |
Holger Hans Peter Freyther | c823c89 | 2009-12-29 08:08:47 +0100 | [diff] [blame] | 41 | u_int32_t header_length; |
| 42 | u_int32_t file_length; |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 43 | char sw_part[20]; |
| 44 | char text1[122]; |
Holger Hans Peter Freyther | c823c89 | 2009-12-29 08:08:47 +0100 | [diff] [blame] | 45 | u_int16_t part_length; |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 46 | /* stuff i don't know */ |
| 47 | } __attribute__((packed)); |
| 48 | |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 49 | struct sdp_header_entry { |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 50 | u_int16_t something1; |
| 51 | char text1[64]; |
| 52 | char time[12]; |
| 53 | char date[14]; |
| 54 | char text2[10]; |
| 55 | char text3[20]; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 56 | u_int32_t length; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 57 | u_int32_t addr1; |
| 58 | u_int32_t addr2; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 59 | u_int32_t start; |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 60 | } __attribute__((packed)); |
| 61 | |
| 62 | static_assert(sizeof(struct sdp_header_entry) == 138, right_entry); |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 63 | static_assert(sizeof(struct sdp_firmware_start) + sizeof(struct sdp_firmware) == 160, _right_header_length); |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 64 | |
Holger Hans Peter Freyther | e0d2ff4 | 2009-12-23 13:03:12 +0100 | [diff] [blame] | 65 | /* more magic, the second "int" in the header */ |
| 66 | static char more_magic[] = { 0x10, 0x02, 0x00, 0x0 }; |
| 67 | |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 68 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 69 | static void analyze_file(int fd, const unsigned int st_size, const unsigned int base_offset) |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 70 | { |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 71 | struct sdp_firmware_start *firmware_start; |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 72 | struct sdp_firmware *firmware_header; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 73 | char buf[4096]; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 74 | int rc, i; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 75 | unsigned int start_offset = 0; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 76 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 77 | rc = read(fd, buf, sizeof(*firmware_start)); |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 78 | if (rc < 0) { |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 79 | perror("Can not read header start."); |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 80 | return; |
| 81 | } |
| 82 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 83 | firmware_start = (struct sdp_firmware_start *) &buf[0]; |
| 84 | if (strncmp(firmware_start->magic, " SDP", 4) != 0) { |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 85 | fprintf(stderr, "Wrong magic.\n"); |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 86 | return; |
| 87 | } |
| 88 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 89 | if (memcmp(firmware_start->more_magic, more_magic, 4) != 0) { |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 90 | fprintf(stderr, "Wrong more magic.\n"); |
Holger Hans Peter Freyther | e0d2ff4 | 2009-12-23 13:03:12 +0100 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 94 | |
| 95 | start_offset = sizeof(*firmware_start); |
| 96 | rc = read(fd, &buf[start_offset], sizeof(*firmware_header)); |
| 97 | if (rc < 0) { |
| 98 | perror("Can not read header."); |
| 99 | return; |
| 100 | } |
| 101 | firmware_header = (struct sdp_firmware *) &buf[start_offset]; |
| 102 | start_offset += sizeof(*firmware_header); |
| 103 | |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 104 | printf("Printing header information:\n"); |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 105 | printf("header_length: %u\n", ntohl(firmware_header->header_length)); |
| 106 | printf("file_length: %u\n", ntohl(firmware_header->file_length)); |
| 107 | printf("sw_part: %.20s\n", firmware_header->sw_part); |
Holger Hans Peter Freyther | 46a920c | 2009-12-29 05:43:57 +0100 | [diff] [blame] | 108 | printf("text1: %.120s\n", firmware_header->text1); |
| 109 | printf("items: %u (rest %u)\n", ntohs(firmware_header->part_length) / PART_LENGTH, |
| 110 | ntohs(firmware_header->part_length) % PART_LENGTH); |
Holger Hans Peter Freyther | 30b9ecd | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 111 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 112 | if (ntohl(firmware_header->file_length) != st_size) { |
Holger Hans Peter Freyther | 30b9ecd | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 113 | fprintf(stderr, "The filesize and the header do not match.\n"); |
| 114 | return; |
| 115 | } |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 116 | |
| 117 | if (ntohs(firmware_header->part_length) % PART_LENGTH != 0) { |
| 118 | fprintf(stderr, "The part length seems to be wrong.\n"); |
| 119 | return; |
| 120 | } |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 121 | |
| 122 | /* look into each firmware now */ |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 123 | for (i = 0; i < ntohs(firmware_header->part_length) / PART_LENGTH; ++i) { |
| 124 | struct sdp_header_entry entry; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame^] | 125 | unsigned int offset = start_offset + base_offset; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 126 | offset += i * 138; |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 127 | |
| 128 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 129 | fprintf(stderr, "Can not seek to the offset: %u.\n", offset); |
| 130 | return; |
| 131 | } |
| 132 | |
| 133 | rc = read(fd, &entry, sizeof(entry)); |
| 134 | if (rc != sizeof(entry)) { |
| 135 | fprintf(stderr, "Can not read the header entry.\n"); |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | printf("Header Entry: %d\n", i); |
| 140 | printf("\tsomething1: %u\n", ntohs(entry.something1)); |
| 141 | printf("\ttext1: %.64s\n", entry.text1); |
| 142 | printf("\ttime: %.12s\n", entry.time); |
| 143 | printf("\tdate: %.14s\n", entry.date); |
| 144 | printf("\ttext2: %.10s\n", entry.text2); |
| 145 | printf("\ttext3: %.20s\n", entry.text3); |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 146 | printf("\taddr1: 0x%x\n", entry.addr1); |
| 147 | printf("\taddr2: 0x%x\n", entry.addr2); |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 148 | printf("\tstart: 0x%x\n", ntohl(entry.start)); |
| 149 | printf("\tlength: 0x%x\n", ntohl(entry.length)); |
| 150 | |
| 151 | /* now we need to find the SDP file... */ |
| 152 | offset = ntohl(entry.start) + 4 + base_offset; |
| 153 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 154 | perror("can't seek to sdp"); |
| 155 | return; |
| 156 | } |
| 157 | |
| 158 | rc = read(fd, &buf, 4); |
| 159 | if (rc != 4) { |
| 160 | perror("peek failed"); |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | printf("FOO %.4s\n", buf); |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 165 | } |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | int main(int argc, char** argv) |
| 169 | { |
| 170 | int i, fd; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 171 | struct stat stat; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 172 | |
| 173 | for (i = 1; i < argc; ++i) { |
| 174 | printf("Opening possible firmware '%s'\n", argv[i]); |
| 175 | fd = open(argv[i], O_RDONLY); |
| 176 | if (!fd) { |
| 177 | perror("nada"); |
| 178 | continue; |
| 179 | } |
| 180 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 181 | /* verify the file */ |
| 182 | if (fstat(fd, &stat) == -1) { |
| 183 | perror("Can not stat the file"); |
| 184 | return EXIT_FAILURE; |
| 185 | } |
| 186 | |
| 187 | analyze_file(fd, stat.st_size, 0); |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | return EXIT_SUCCESS; |
| 191 | } |