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