| /* 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 <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> |
| |
| |
| /* more magic, the second "int" in the header */ |
| static char more_magic[] = { 0x10, 0x02, 0x00, 0x0 }; |
| |
| |
| static void analyze_file(int fd) |
| { |
| char buf[4096]; |
| int rc; |
| unsigned int absolute_size; |
| |
| rc = read(fd, buf, 4); |
| if (rc <= 0) { |
| fprintf(stderr, "Not enough space for the header.\n"); |
| return; |
| } |
| |
| if (strcmp(buf, " SDP") != 0) { |
| fprintf(stderr, "Wrong magic number at the beginning of the file.\n"); |
| return; |
| } |
| |
| rc = read(fd, buf, 4); |
| if (rc <= 0) { |
| fprintf(stderr, "Not enough space for the more_magic.\n"); |
| return; |
| } |
| |
| if (strncmp(buf, more_magic, 4) != 0) { |
| fprintf(stderr, "The more magic is not right.\n"); |
| return; |
| } |
| |
| rc = read(fd, buf, 4); |
| if (rc <= 0) { |
| fprintf(stderr, "Trying to read the header length failed.\n"); |
| return; |
| } |
| |
| memcpy(&absolute_size, &buf[0], 4); |
| absolute_size = ntohl(absolute_size); |
| |
| printf("Printing header information:\n"); |
| printf("The header is %u bytes long\n", absolute_size); |
| } |
| |
| int main(int argc, char** argv) |
| { |
| int i, fd; |
| |
| for (i = 1; i < argc; ++i) { |
| printf("Opening possible firmware '%s'\n", argv[i]); |
| fd = open(argv[i], O_RDONLY); |
| if (!fd) { |
| perror("nada"); |
| continue; |
| } |
| |
| analyze_file(fd); |
| } |
| |
| return EXIT_SUCCESS; |
| } |