main.c

   1 /**
   2  * nmrpflash - Netgear Unbrick Utility
   3  * Copyright (C) 2016 Joseph Lehner <joseph.c.lehner@gmail.com>
   4  *
   5  * nmrpflash is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * nmrpflash is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with nmrpflash.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #include <unistd.h>
  21 #include <getopt.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include "nmrpd.h"
  25
  26 int verbosity = 0;
  27
  28 void usage(FILE *fp)
  29 {
  30         fprintf(fp,
  31                         "Usage: nmrpflash [OPTIONS...]\n"
  32                         "\n"
  33                         "Options (-i, -f and/or -c are mandatory):\n"
  34                         " -a <ipaddr>     IP address to assign to target device\n"
  35                         " -A <ipaddr>     IP address to assign to seleted interface\n"
  36                         " -c <command>    Command to run before (or instead of) TFTP upload\n"
  37                         " -f <firmware>   Firmware file\n"
  38                         " -F <filename>   Remote filename to use during TFTP upload\n"
  39                         " -i <interface>  Network interface directly connected to device\n"
  40                         " -m <mac>        MAC address of target device (xx:xx:xx:xx:xx:xx)\n"
  41                         " -M <netmask>    Subnet mask to assign to target device\n"
  42                         " -t <timeout>    Timeout (in milliseconds) for regular messages\n"
  43                         " -T <timeout>    Time (seconds) to wait after successfull TFTP upload\n"
  44                         " -p <port>       Port to use for TFTP upload\n"
  45 #ifdef NMRPFLASH_SET_REGION
  46                         " -R <region>     Set device region (NA, WW, GR, PR, RU, BZ, IN, KO, JP)\n"
  47 #endif
  48 #ifdef NMRPFLASH_TFTP_TEST
  49                         " -U              Test TFTP upload\n"
  50 #endif
  51                         " -v              Be verbose\n"
  52                         " -V              Print version and exit\n"
  53                         " -L              List network interfaces\n"
  54                         " -h              Show this screen\n"
  55                         "\n"
  56                         "Example: (run as "
  57 #ifndef NMRPFLASH_WINDOWS
  58                         "root"
  59 #else
  60                         "administrator"
  61 #endif
  62                         ")\n\n"
  63 #ifndef NMRPFLASH_WINDOWS
  64                         "# nmrpflash -i eth0 -f firmware.bin\n"
  65 #else
  66                         "C:\\> nmrpflash.exe -i net0 -f firmware.bin\n"
  67 #endif
  68                         "\n"
  69                         "When using -c, the environment variables IP, PORT, NETMASK\n"
  70                         "and MAC are set to the device IP address, TFTP port, subnet\n"
  71                         "mask and MAC address, respectively.\n"
  72                         "\n"
  73                         "nmrpflash %s, Copyright (C) 2016 Joseph C. Lehner\n"
  74                         "nmrpflash is free software, licensed under the GNU GPLv3.\n"
  75                         "Source code at https://github.com/jclehner/nmrpflash\n"
  76                         "\n",
  77                         NMRPFLASH_VERSION
  78           );
  79 }
  80
  81 #ifdef NMRPFLASH_WINDOWS
  82 void require_admin()
  83 {
  84         SID_IDENTIFIER_AUTHORITY auth = SECURITY_NT_AUTHORITY;
  85         PSID group = NULL;
  86         BOOL admin, success = AllocateAndInitializeSid(
  87                 &auth, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS,
  88                 0, 0, 0, 0, 0, 0, &group
  89         );
  90
  91         if (success) {
  92                 success = CheckTokenMembership(NULL, group, &admin);
  93                 FreeSid(group);
  94                 if (success) {
  95                         if (!admin) {
  96                                 fprintf(stderr, "Error: must be run as administrator\n");
  97                                 exit(1);
  98                         } else {
  99                                 return;
 100                         }
 101                 }
 102         }
 103
 104         fprintf(stderr, "Warning: failed to check administrator privileges\n");
 105 }
 106
 107 void show_exit_prompt()
 108 {
 109         DWORD pid;
 110         HWND win = GetConsoleWindow();
 111         if (!win || !GetWindowThreadProcessId(win, &pid)) {
 112                 return;
 113         }
 114
 115         if (GetCurrentProcessId() == pid) {
 116                 printf("Press any key to exit\n");
 117                 getch();
 118         }
 119 }
 120 #else
 121 void require_admin()
 122 {
 123         if (getuid() != 0) {
 124                 fprintf(stderr, "Error: must be run as root\n");
 125                 exit(1);
 126         }
 127 }
 128 #endif
 129
 130 int main(int argc, char **argv)
 131 {
 132         int c, val, max;
 133         int list = 0;
 134         struct nmrpd_args args = {
 135                 .rx_timeout = 200,
 136                 .ul_timeout = 5 * 60 * 1000,
 137                 .tftpcmd = NULL,
 138                 .file_local = NULL,
 139                 .file_remote = NULL,
 140                 .ipaddr_intf = NULL,
 141                 .ipaddr = NULL,
 142                 .ipmask = "255.255.255.0",
 143                 .intf = NULL,
 144                 .mac = "ff:ff:ff:ff:ff:ff",
 145                 .op = NMRP_UPLOAD_FW,
 146                 .port = 69,
 147                 .region = NULL,
 148         };
 149 #ifdef NMRPFLASH_WINDOWS
 150         char *newpath = NULL;
 151         char *oldpath = NULL;
 152         char *windir = NULL;
 153         WSADATA wsa;
 154
 155         atexit(&show_exit_prompt);
 156
 157         val = WSAStartup(MAKEWORD(2, 2), &wsa);
 158         if (val != 0) {
 159                 win_perror2("WSAStartup", val);
 160                 return 1;
 161         }
 162
 163
 164 #ifndef _WIN64
 165         // This dirty hack works around the WOW64 file system redirector[1], which would prevent
 166         // us from calling programs residing in %windir%\System32 when running on a 64bit system
 167         // (since nmrpflash is currently shipped as 32bit only).
 168         //
 169         // [1] https://msdn.microsoft.com/en-us/library/windows/desktop/aa384187(v=vs.85).aspx
 170
 171         oldpath = getenv("PATH");
 172         windir = getenv("WINDIR");
 173         if (oldpath && windir) {
 174                 newpath = malloc(strlen(oldpath) + strlen(windir) + 32);
 175                 sprintf(newpath, "%s;%s\\Sysnative", oldpath, windir);
 176                 SetEnvironmentVariable("PATH", newpath);
 177                 free(newpath);
 178         }
 179 #endif
 180 #endif
 181
 182         opterr = 0;
 183
 184         while ((c = getopt(argc, argv, "a:A:c:f:F:i:m:M:p:R:t:T:hLVvU")) != -1) {
 185                 max = 0x7fffffff;
 186                 switch (c) {
 187                         case 'a':
 188                                 args.ipaddr = optarg;
 189                                 break;
 190                         case 'A':
 191                                 args.ipaddr_intf = optarg;
 192                                 break;
 193                         case 'c':
 194                                 args.tftpcmd = optarg;
 195                                 break;
 196                         case 'f':
 197                                 args.file_local = optarg;
 198                                 break;
 199                         case 'F':
 200                                 args.file_remote = optarg;
 201                                 break;
 202                         case 'i':
 203                                 args.intf = optarg;
 204                                 break;
 205                         case 'm':
 206                                 args.mac = optarg;
 207                                 break;
 208                         case 'M':
 209                                 args.ipmask = optarg;
 210                                 break;
 211 #ifdef NMRPFLASH_SET_REGION
 212                         case 'R':
 213                                 args.region = optarg;
 214                                 break;
 215 #endif
 216                         case 'p':
 217                         case 'T':
 218                         case 't':
 219                                 if (c == 'p') {
 220                                         max = 0xffff;
 221                                 }
 222
 223                                 val = atoi(optarg);
 224                                 if (val <= 0 || val > max) {
 225                                         fprintf(stderr, "Invalid numeric value for -%c.\n", c);
 226                                         return 1;
 227                                 }
 228
 229                                 if (c == 'p') {
 230                                         args.port = val;
 231                                 } else if (c == 't') {
 232                                         args.rx_timeout = val;
 233                                 } else if (c == 'T') {
 234                                         args.ul_timeout = val * 1000;
 235                                 }
 236
 237                                 break;
 238                         case 'V':
 239                                 printf("nmrpflash %s\n", NMRPFLASH_VERSION);
 240                                 val = 0;
 241                                 goto out;
 242                         case 'v':
 243                                 ++verbosity;
 244                                 break;
 245                         case 'L':
 246                                 list = 1;
 247                                 break;
 248                                 goto out;
 249                         case 'h':
 250                                 usage(stdout);
 251                                 val = 0;
 252                                 goto out;
 253 #ifdef NMRPFLASH_TFTP_TEST
 254                         case 'U':
 255                                 if (args.ipaddr && args.file_local) {
 256                                         val = tftp_put(&args);
 257                                         goto out;
 258                                 }
 259                                 /* fall through */
 260 #endif
 261                         default:
 262                                 usage(stderr);
 263                                 val = 1;
 264                                 goto out;
 265                 }
 266         }
 267
 268         if (args.ipaddr_intf && !args.ipaddr) {
 269                 fprintf(stderr, "Error: cannot use -A <ipaddr> without using -a <ipaddr>.\n");
 270                 return 1;
 271         }
 272
 273 #ifndef NMRPFLASH_FUZZ
 274         if (!list && ((!args.file_local && !args.tftpcmd) || !args.intf /*|| !args.ipaddr*/)) {
 275                 usage(stderr);
 276                 return 1;
 277         }
 278
 279         if (!list) {
 280                 require_admin();
 281         }
 282 #endif
 283         val = !list ? nmrp_do(&args) : ethsock_list_all();
 284
 285 out:
 286 #ifdef NMRPFLASH_WINDOWS
 287         WSACleanup();
 288 #endif
 289         return val;
 290 }