Holger Hans Peter Freyther | 2281797 | 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 | eb9766f | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 22 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 23 | #include <openbsc/ipaccess.h> |
Harald Welte | f4625b1 | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 24 | #include <osmocore/talloc.h> |
Holger Hans Peter Freyther | eb9766f | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 25 | |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
Holger Hans Peter Freyther | f3d4a1b | 2009-12-30 07:08:39 +0100 | [diff] [blame] | 29 | #include <unistd.h> |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 30 | |
Holger Hans Peter Freyther | 0a4deca | 2009-12-29 05:43:57 +0100 | [diff] [blame] | 31 | #define PART_LENGTH 138 |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 32 | |
Holger Hans Peter Freyther | eb9766f | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 33 | static_assert(sizeof(struct sdp_header_entry) == 138, right_entry); |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 34 | static_assert(sizeof(struct sdp_firmware) == 158, _right_header_length); |
Holger Hans Peter Freyther | eb9766f | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | e4cef6c | 2009-12-23 13:03:12 +0100 | [diff] [blame] | 36 | /* more magic, the second "int" in the header */ |
Holger Hans Peter Freyther | b144886 | 2009-12-29 18:41:43 +0100 | [diff] [blame] | 37 | static char more_magic[] = { 0x10, 0x02 }; |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 38 | |
Holger Hans Peter Freyther | f3d4a1b | 2009-12-30 07:08:39 +0100 | [diff] [blame] | 39 | int ipaccess_analyze_file(int fd, const unsigned int st_size, const unsigned int base_offset, struct llist_head *list) |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 40 | { |
Holger Hans Peter Freyther | 60f3027 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 41 | struct sdp_firmware *firmware_header = 0; |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 42 | struct sdp_header *header; |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 43 | char buf[4096]; |
Holger Hans Peter Freyther | 21c87d1 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 44 | int rc, i; |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 45 | u_int16_t table_size; |
| 46 | u_int16_t table_offset; |
Holger Hans Peter Freyther | 2321da8 | 2010-03-22 10:05:26 +0100 | [diff] [blame] | 47 | off_t table_start; |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 48 | |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 49 | |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 50 | rc = read(fd, buf, sizeof(*firmware_header)); |
Holger Hans Peter Freyther | 0306798 | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 51 | if (rc < 0) { |
Holger Hans Peter Freyther | 1fe0a16 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 52 | perror("Can not read header start."); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 53 | return -1; |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 54 | } |
| 55 | |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 56 | firmware_header = (struct sdp_firmware *) &buf[0]; |
| 57 | if (strncmp(firmware_header->magic, " SDP", 4) != 0) { |
Holger Hans Peter Freyther | 0306798 | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 58 | fprintf(stderr, "Wrong magic.\n"); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 59 | return -1; |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 60 | } |
| 61 | |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 62 | if (memcmp(firmware_header->more_magic, more_magic, 2) != 0) { |
Holger Hans Peter Freyther | 60f3027 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 63 | fprintf(stderr, "Wrong more magic. Got: 0x%x %x %x %x\n", |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 64 | firmware_header->more_magic[0] & 0xff, firmware_header->more_magic[1] & 0xff, |
| 65 | firmware_header->more_magic[2] & 0xff, firmware_header->more_magic[3] & 0xff); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 66 | return -1; |
Holger Hans Peter Freyther | 1fe0a16 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 67 | } |
Holger Hans Peter Freyther | 60f3027 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 68 | |
| 69 | |
Holger Hans Peter Freyther | a983542 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 70 | if (ntohl(firmware_header->file_length) != st_size) { |
Holger Hans Peter Freyther | b7f5313 | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 71 | fprintf(stderr, "The filesize and the header do not match.\n"); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 72 | return -1; |
Holger Hans Peter Freyther | b7f5313 | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 73 | } |
Holger Hans Peter Freyther | eb9766f | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 74 | |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 75 | /* add the firmware */ |
Holger Hans Peter Freyther | 970dda6 | 2009-12-30 06:40:36 +0100 | [diff] [blame] | 76 | header = talloc_zero(list, struct sdp_header); |
Holger Hans Peter Freyther | 4a00258 | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 77 | header->firmware_info = *firmware_header; |
Holger Hans Peter Freyther | f327f6f | 2009-12-30 06:10:56 +0100 | [diff] [blame] | 78 | INIT_LLIST_HEAD(&header->header_list); |
| 79 | llist_add(&header->entry, list); |
Holger Hans Peter Freyther | b144886 | 2009-12-29 18:41:43 +0100 | [diff] [blame] | 80 | |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 81 | table_offset = ntohs(firmware_header->table_offset); |
Holger Hans Peter Freyther | 2321da8 | 2010-03-22 10:05:26 +0100 | [diff] [blame] | 82 | table_start = lseek(fd, table_offset, SEEK_CUR); |
| 83 | if (table_start == -1) { |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 84 | fprintf(stderr, "Failed to seek to the rel position: 0x%x\n", table_offset); |
| 85 | return -1; |
| 86 | } |
Holger Hans Peter Freyther | cdf5293 | 2010-03-22 09:51:43 +0100 | [diff] [blame] | 87 | |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 88 | if (read(fd, &table_size, sizeof(table_size)) != sizeof(table_size)) { |
| 89 | fprintf(stderr, "The table size could not be read.\n"); |
| 90 | return -1; |
| 91 | } |
| 92 | |
| 93 | table_size = ntohs(table_size); |
| 94 | |
| 95 | if (table_size % PART_LENGTH != 0) { |
| 96 | fprintf(stderr, "The part length seems to be wrong: 0x%x\n", table_size); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 97 | return -1; |
Holger Hans Peter Freyther | eb9766f | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 98 | } |
Holger Hans Peter Freyther | 21c87d1 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 99 | |
| 100 | /* look into each firmware now */ |
Holger Hans Peter Freyther | 5a67002 | 2010-03-22 09:59:57 +0100 | [diff] [blame] | 101 | for (i = 0; i < table_size / PART_LENGTH; ++i) { |
Holger Hans Peter Freyther | 1bc845e | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 102 | struct sdp_header_entry entry; |
Holger Hans Peter Freyther | 0a610e9 | 2009-12-30 06:13:36 +0100 | [diff] [blame] | 103 | struct sdp_header_item *header_entry; |
Holger Hans Peter Freyther | 2321da8 | 2010-03-22 10:05:26 +0100 | [diff] [blame] | 104 | unsigned int offset = table_start + 2; |
Holger Hans Peter Freyther | 21c87d1 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 105 | offset += i * 138; |
Holger Hans Peter Freyther | 1bc845e | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 106 | |
| 107 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 108 | fprintf(stderr, "Can not seek to the offset: %u.\n", offset); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 109 | return -1; |
Holger Hans Peter Freyther | 1bc845e | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | rc = read(fd, &entry, sizeof(entry)); |
| 113 | if (rc != sizeof(entry)) { |
| 114 | fprintf(stderr, "Can not read the header entry.\n"); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 115 | return -1; |
Holger Hans Peter Freyther | 1bc845e | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 116 | } |
| 117 | |
Holger Hans Peter Freyther | 2a3becf | 2010-03-22 10:14:46 +0100 | [diff] [blame] | 118 | header_entry = talloc_zero(header, struct sdp_header_item); |
| 119 | header_entry->header_entry = entry; |
Holger Hans Peter Freyther | c52dd36 | 2010-03-22 11:50:30 +0100 | [diff] [blame] | 120 | header_entry->absolute_offset = base_offset; |
Holger Hans Peter Freyther | 2a3becf | 2010-03-22 10:14:46 +0100 | [diff] [blame] | 121 | llist_add(&header_entry->entry, &header->header_list); |
| 122 | |
Holger Hans Peter Freyther | a983542 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 123 | /* now we need to find the SDP file... */ |
| 124 | offset = ntohl(entry.start) + 4 + base_offset; |
| 125 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 126 | perror("can't seek to sdp"); |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 127 | return -1; |
Holger Hans Peter Freyther | a983542 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 128 | } |
| 129 | |
Holger Hans Peter Freyther | f327f6f | 2009-12-30 06:10:56 +0100 | [diff] [blame] | 130 | |
Holger Hans Peter Freyther | f3d4a1b | 2009-12-30 07:08:39 +0100 | [diff] [blame] | 131 | ipaccess_analyze_file(fd, ntohl(entry.length), offset, list); |
Holger Hans Peter Freyther | 21c87d1 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 132 | } |
Holger Hans Peter Freyther | 4019a98 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 133 | |
| 134 | return 0; |
Holger Hans Peter Freyther | 2281797 | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 135 | } |
| 136 | |