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]; |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 37 | char more_magic[2]; |
| 38 | u_int16_t more_more_magic; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 39 | } __attribute__((packed)); |
| 40 | |
| 41 | struct sdp_firmware { |
Holger Hans Peter Freyther | c823c89 | 2009-12-29 08:08:47 +0100 | [diff] [blame] | 42 | u_int32_t header_length; |
| 43 | u_int32_t file_length; |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 44 | char sw_part[20]; |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 45 | char text1[64]; |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 46 | char time[12]; |
| 47 | char date[14]; |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 48 | char text2[10]; |
| 49 | char text3[20]; |
| 50 | u_int8_t dummy[2]; |
| 51 | u_int16_t part_length; |
| 52 | /* stuff i don't know */ |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 53 | } __attribute__((packed)); |
| 54 | |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 55 | struct sdp_header_entry { |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 56 | u_int16_t something1; |
| 57 | char text1[64]; |
| 58 | char time[12]; |
| 59 | char date[14]; |
| 60 | char text2[10]; |
| 61 | char text3[20]; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 62 | u_int32_t length; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 63 | u_int32_t addr1; |
| 64 | u_int32_t addr2; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 65 | u_int32_t start; |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 66 | } __attribute__((packed)); |
| 67 | |
| 68 | static_assert(sizeof(struct sdp_header_entry) == 138, right_entry); |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 69 | 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] | 70 | |
Holger Hans Peter Freyther | e0d2ff4 | 2009-12-23 13:03:12 +0100 | [diff] [blame] | 71 | /* more magic, the second "int" in the header */ |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 72 | static char more_magic[] = { 0x10, 0x02 }; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 73 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 74 | 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] | 75 | { |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 76 | struct sdp_firmware_start *firmware_start; |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 77 | struct sdp_firmware *firmware_header = 0; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 78 | char buf[4096]; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 79 | int rc, i; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 80 | unsigned int start_offset = 0; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 81 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 82 | rc = read(fd, buf, sizeof(*firmware_start)); |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 83 | if (rc < 0) { |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 84 | perror("Can not read header start."); |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 85 | return; |
| 86 | } |
| 87 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 88 | firmware_start = (struct sdp_firmware_start *) &buf[0]; |
| 89 | if (strncmp(firmware_start->magic, " SDP", 4) != 0) { |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 90 | fprintf(stderr, "Wrong magic.\n"); |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 94 | start_offset = sizeof(*firmware_start); |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 95 | if (memcmp(firmware_start->more_magic, more_magic, 2) == 0) { |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 96 | rc = read(fd, &buf[start_offset], sizeof(*firmware_header)); |
| 97 | if (rc != sizeof(*firmware_header)) { |
| 98 | perror("Can not read header."); |
| 99 | return; |
| 100 | } |
| 101 | firmware_header = (struct sdp_firmware *) &buf[start_offset]; |
| 102 | start_offset += sizeof(*firmware_header); |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 103 | } else { |
| 104 | fprintf(stderr, "Wrong more magic. Got: 0x%x %x %x %x\n", |
| 105 | firmware_start->more_magic[0] & 0xff, firmware_start->more_magic[1] & 0xff, |
| 106 | firmware_start->more_magic[2] & 0xff, firmware_start->more_magic[3] & 0xff); |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 107 | return; |
| 108 | } |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 109 | |
| 110 | |
| 111 | if (!firmware_header) |
| 112 | return; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 113 | |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 114 | printf("Printing header information:\n"); |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 115 | printf("more_more_magic: 0x%x\n", ntohs(firmware_start->more_more_magic)); |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 116 | printf("header_length: %u\n", ntohl(firmware_header->header_length)); |
| 117 | printf("file_length: %u\n", ntohl(firmware_header->file_length)); |
| 118 | printf("sw_part: %.20s\n", firmware_header->sw_part); |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 119 | printf("text1: %.64s\n", firmware_header->text1); |
| 120 | printf("time: %.12s\n", firmware_header->time); |
| 121 | printf("date: %.14s\n", firmware_header->date); |
| 122 | printf("text2: %.10s\n", firmware_header->text2); |
| 123 | printf("text3: %.20s\n", firmware_header->text3); |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 124 | if (ntohl(firmware_header->file_length) != st_size) { |
Holger Hans Peter Freyther | 30b9ecd | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 125 | fprintf(stderr, "The filesize and the header do not match.\n"); |
| 126 | return; |
| 127 | } |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 128 | |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame^] | 129 | /* this semantic appears to be only the case for 0x0000 */ |
| 130 | if (firmware_start->more_more_magic != 0) |
| 131 | return; |
| 132 | |
| 133 | printf("items: %u (rest %u)\n", ntohs(firmware_header->part_length) / PART_LENGTH, |
| 134 | ntohs(firmware_header->part_length) % PART_LENGTH); |
| 135 | |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 136 | if (ntohs(firmware_header->part_length) % PART_LENGTH != 0) { |
| 137 | fprintf(stderr, "The part length seems to be wrong.\n"); |
| 138 | return; |
| 139 | } |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 140 | |
| 141 | /* look into each firmware now */ |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 142 | for (i = 0; i < ntohs(firmware_header->part_length) / PART_LENGTH; ++i) { |
| 143 | struct sdp_header_entry entry; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 144 | unsigned int offset = start_offset + base_offset; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 145 | offset += i * 138; |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 146 | |
| 147 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 148 | fprintf(stderr, "Can not seek to the offset: %u.\n", offset); |
| 149 | return; |
| 150 | } |
| 151 | |
| 152 | rc = read(fd, &entry, sizeof(entry)); |
| 153 | if (rc != sizeof(entry)) { |
| 154 | fprintf(stderr, "Can not read the header entry.\n"); |
| 155 | return; |
| 156 | } |
| 157 | |
| 158 | printf("Header Entry: %d\n", i); |
| 159 | printf("\tsomething1: %u\n", ntohs(entry.something1)); |
| 160 | printf("\ttext1: %.64s\n", entry.text1); |
| 161 | printf("\ttime: %.12s\n", entry.time); |
| 162 | printf("\tdate: %.14s\n", entry.date); |
| 163 | printf("\ttext2: %.10s\n", entry.text2); |
| 164 | printf("\ttext3: %.20s\n", entry.text3); |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 165 | printf("\taddr1: 0x%x\n", entry.addr1); |
| 166 | printf("\taddr2: 0x%x\n", entry.addr2); |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 167 | printf("\tstart: 0x%x\n", ntohl(entry.start)); |
| 168 | printf("\tlength: 0x%x\n", ntohl(entry.length)); |
| 169 | |
| 170 | /* now we need to find the SDP file... */ |
| 171 | offset = ntohl(entry.start) + 4 + base_offset; |
| 172 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 173 | perror("can't seek to sdp"); |
| 174 | return; |
| 175 | } |
| 176 | |
Holger Hans Peter Freyther | b1414d9 | 2009-12-29 18:22:29 +0100 | [diff] [blame] | 177 | printf("------> parsing\n"); |
| 178 | analyze_file(fd, ntohl(entry.length), offset); |
| 179 | printf("<------ parsing\n"); |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 180 | } |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | int main(int argc, char** argv) |
| 184 | { |
| 185 | int i, fd; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 186 | struct stat stat; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 187 | |
| 188 | for (i = 1; i < argc; ++i) { |
| 189 | printf("Opening possible firmware '%s'\n", argv[i]); |
| 190 | fd = open(argv[i], O_RDONLY); |
| 191 | if (!fd) { |
| 192 | perror("nada"); |
| 193 | continue; |
| 194 | } |
| 195 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 196 | /* verify the file */ |
| 197 | if (fstat(fd, &stat) == -1) { |
| 198 | perror("Can not stat the file"); |
| 199 | return EXIT_FAILURE; |
| 200 | } |
| 201 | |
| 202 | analyze_file(fd, stat.st_size, 0); |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | return EXIT_SUCCESS; |
| 206 | } |