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> |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 23 | #include <openbsc/ipaccess.h> |
Holger Hans Peter Freyther | af351a2 | 2009-12-30 06:40:36 +0100 | [diff] [blame] | 24 | #include <openbsc/talloc.h> |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 25 | |
Holger Hans Peter Freyther | 65d67dc | 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 | dade898 | 2009-12-30 07:08:39 +0100 | [diff] [blame] | 29 | #include <unistd.h> |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 30 | |
Holger Hans Peter Freyther | 46a920c | 2009-12-29 05:43:57 +0100 | [diff] [blame] | 31 | #define PART_LENGTH 138 |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 32 | |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 33 | static_assert(sizeof(struct sdp_header_entry) == 138, right_entry); |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 34 | static_assert(sizeof(struct sdp_firmware) == 160, _right_header_length); |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | e0d2ff4 | 2009-12-23 13:03:12 +0100 | [diff] [blame] | 36 | /* more magic, the second "int" in the header */ |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame] | 37 | static char more_magic[] = { 0x10, 0x02 }; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 38 | |
Holger Hans Peter Freyther | dade898 | 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 | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 40 | { |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 41 | struct sdp_firmware *firmware_header = 0; |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 42 | struct sdp_header *header; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 43 | char buf[4096]; |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 44 | int rc, i; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 45 | |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 46 | rc = read(fd, buf, sizeof(*firmware_header)); |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 47 | if (rc < 0) { |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 48 | perror("Can not read header start."); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 49 | return -1; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 50 | } |
| 51 | |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 52 | firmware_header = (struct sdp_firmware *) &buf[0]; |
| 53 | if (strncmp(firmware_header->magic, " SDP", 4) != 0) { |
Holger Hans Peter Freyther | 9094cba | 2009-12-24 10:19:51 +0100 | [diff] [blame] | 54 | fprintf(stderr, "Wrong magic.\n"); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 55 | return -1; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 56 | } |
| 57 | |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 58 | if (memcmp(firmware_header->more_magic, more_magic, 2) != 0) { |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 59 | fprintf(stderr, "Wrong more magic. Got: 0x%x %x %x %x\n", |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 60 | firmware_header->more_magic[0] & 0xff, firmware_header->more_magic[1] & 0xff, |
| 61 | firmware_header->more_magic[2] & 0xff, firmware_header->more_magic[3] & 0xff); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 62 | return -1; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 63 | } |
Holger Hans Peter Freyther | 1684e79 | 2009-12-29 18:23:06 +0100 | [diff] [blame] | 64 | |
| 65 | |
| 66 | if (!firmware_header) |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 67 | return -1; |
Holger Hans Peter Freyther | 1029f84 | 2009-12-29 14:27:10 +0100 | [diff] [blame] | 68 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 69 | if (ntohl(firmware_header->file_length) != st_size) { |
Holger Hans Peter Freyther | 30b9ecd | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 70 | fprintf(stderr, "The filesize and the header do not match.\n"); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 71 | return -1; |
Holger Hans Peter Freyther | 30b9ecd | 2009-12-27 14:03:11 +0100 | [diff] [blame] | 72 | } |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 73 | |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 74 | /* add the firmware */ |
Holger Hans Peter Freyther | af351a2 | 2009-12-30 06:40:36 +0100 | [diff] [blame] | 75 | header = talloc_zero(list, struct sdp_header); |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 76 | header->firmware_info = *firmware_header; |
Holger Hans Peter Freyther | c9f8a6d | 2009-12-30 06:10:56 +0100 | [diff] [blame] | 77 | INIT_LLIST_HEAD(&header->header_list); |
| 78 | llist_add(&header->entry, list); |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame] | 79 | |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 80 | /* this semantic appears to be only the case for 0x0000 */ |
| 81 | if (firmware_header->more_more_magic != 0) |
| 82 | return -1; |
Holger Hans Peter Freyther | 67b05d5 | 2009-12-29 18:41:43 +0100 | [diff] [blame] | 83 | |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 84 | if (ntohs(firmware_header->part_length) % PART_LENGTH != 0) { |
| 85 | fprintf(stderr, "The part length seems to be wrong.\n"); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 86 | return -1; |
Holger Hans Peter Freyther | 567b326 | 2009-12-29 06:01:36 +0100 | [diff] [blame] | 87 | } |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 88 | |
| 89 | /* look into each firmware now */ |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 90 | for (i = 0; i < ntohs(firmware_header->part_length) / PART_LENGTH; ++i) { |
| 91 | struct sdp_header_entry entry; |
Holger Hans Peter Freyther | 0183edd | 2009-12-30 06:13:36 +0100 | [diff] [blame] | 92 | struct sdp_header_item *header_entry; |
Holger Hans Peter Freyther | 4a98cad | 2009-12-30 05:56:49 +0100 | [diff] [blame] | 93 | unsigned int offset = base_offset + sizeof(struct sdp_firmware); |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 94 | offset += i * 138; |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 95 | |
| 96 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 97 | fprintf(stderr, "Can not seek to the offset: %u.\n", offset); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 98 | return -1; |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | rc = read(fd, &entry, sizeof(entry)); |
| 102 | if (rc != sizeof(entry)) { |
| 103 | fprintf(stderr, "Can not read the header entry.\n"); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 104 | return -1; |
Holger Hans Peter Freyther | ebdcee2 | 2009-12-29 08:27:21 +0100 | [diff] [blame] | 105 | } |
| 106 | |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 107 | /* now we need to find the SDP file... */ |
| 108 | offset = ntohl(entry.start) + 4 + base_offset; |
| 109 | if (lseek(fd, offset, SEEK_SET) != offset) { |
| 110 | perror("can't seek to sdp"); |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 111 | return -1; |
Holger Hans Peter Freyther | e29be15 | 2009-12-29 13:02:19 +0100 | [diff] [blame] | 112 | } |
| 113 | |
Holger Hans Peter Freyther | af351a2 | 2009-12-30 06:40:36 +0100 | [diff] [blame] | 114 | header_entry = talloc_zero(header, struct sdp_header_item); |
Holger Hans Peter Freyther | c9f8a6d | 2009-12-30 06:10:56 +0100 | [diff] [blame] | 115 | header_entry->header_entry = entry; |
| 116 | llist_add(&header_entry->entry, &header->header_list); |
| 117 | |
Holger Hans Peter Freyther | dade898 | 2009-12-30 07:08:39 +0100 | [diff] [blame] | 118 | ipaccess_analyze_file(fd, ntohl(entry.length), offset, list); |
Holger Hans Peter Freyther | 07a4026 | 2009-12-29 08:09:54 +0100 | [diff] [blame] | 119 | } |
Holger Hans Peter Freyther | 8f99562 | 2009-12-30 04:47:27 +0100 | [diff] [blame] | 120 | |
| 121 | return 0; |
Holger Hans Peter Freyther | 65d67dc | 2009-12-23 12:52:30 +0100 | [diff] [blame] | 122 | } |
| 123 | |