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 (-a, -i and -f and/or -c are mandatory):\n"
  36                         " -a <ipaddr>     IP address to assign to target device\n"
  37                         " -c <command>    Command to run before (or instead of) TFTP upload\n"
  38                         " -f <firmware>   Firmware file\n"
  39                         " -F <filename>   Remote filename to use during TFTP upload\n"
  40                         " -i <interface>  Network interface directly connected to device\n"
  41                         " -m <mac>        MAC address of target device (xx:xx:xx:xx:xx:xx)\n"
  42                         " -M <netmask>    Subnet mask to assign to target device\n"
  43                         " -t <timeout>    Timeout (in milliseconds) for regular messages\n"
  44                         " -T <timeout>    Time (seconds) to wait after successfull TFTP upload\n"
  45                         " -p <port>       Port to use for TFTP upload\n"
  46 #ifdef NMRPFLASH_SET_REGION
  47                         " -R <region>     Set device region (NA, WW, GR, PR, RU, BZ, IN, KO, JP)\n"
  48 #endif
  49 #ifdef NMRPFLASH_TFTP_TEST
  50                         " -U              Test TFTP upload\n"
  51 #endif
  52                         " -v              Be verbose\n"
  53                         " -V              Print version and exit\n"
  54                         " -L              List network interfaces\n"
  55                         " -h              Show this screen\n"
  56                         "\n"
  57                         "Example: (run as "
  58 #ifndef NMRPFLASH_WINDOWS
  59                         "root"
  60 #else
  61                         "administrator"
  62 #endif
  63                         ")\n\n"
  64 #ifndef NMRPFLASH_WINDOWS
  65                         "# nmrpflash -i eth0 -a 192.168.1.254 -f firmware.bin\n"
  66 #else
  67                         "C:\\> nmrpflash.exe -i net0 -a 192.168.1.254 -f firmware.bin\n"
  68 #endif
  69                         "\n"
  70                         "nmrpflash %s, Copyright (C) 2016 Joseph C. Lehner\n"
  71                         "nmrpflash is free software, licensed under the GNU GPLv3.\n"
  72                         "Source code at https://github.com/jclehner/nmrpflash\n"
  73                         "\n",
  74                         NMRPFLASH_VERSION
  75           );
  76 }
  77
  78 #ifdef NMRPFLASH_WINDOWS
  79 void require_admin()
  80 {
  81         SID_IDENTIFIER_AUTHORITY auth = SECURITY_NT_AUTHORITY;
  82         PSID adminGroup = NULL;
  83         BOOL success = AllocateAndInitializeSid(
  84                 &auth, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS,
  85                 0, 0, 0, 0, 0, 0, &adminGroup
  86         );
  87
  88         if (success) {
  89                 if (CheckTokenMembership(NULL, adminGroup, &success)) {
  90                         if (!success) {
  91                                 fprintf(stderr, "Error: must be run as administrator\n");
  92                                 exit(1);
  93                         } else {
  94                                 return;
  95                         }
  96                 }
  97                 FreeSid(adminGroup);
  98         }
  99
 100         fprintf(stderr, "Warning: failed to check administrator privileges\n");
 101 }
 102 #else
 103 void require_admin()
 104 {
 105         if (getuid() != 0) {
 106                 fprintf(stderr, "Error: must be run as root\n");
 107                 exit(1);
 108         }
 109 }
 110 #endif
 111
 112 int main(int argc, char **argv)
 113 {
 114         int c, val, max;
 115         int list = 0;
 116         struct nmrpd_args args = {
 117                 .rx_timeout = 200,
 118                 .ul_timeout = 5 * 60 * 1000,
 119                 .tftpcmd = NULL,
 120                 .file_local = NULL,
 121                 .file_remote = NULL,
 122                 .ipaddr = NULL,
 123                 .ipmask = "255.255.255.0",
 124                 .intf = NULL,
 125                 .mac = "ff:ff:ff:ff:ff:ff",
 126                 .op = NMRP_UPLOAD_FW,
 127                 .port = 69,
 128                 .region = NULL,
 129         };
 130 #ifdef NMRPFLASH_WINDOWS
 131         char *newpath = NULL;
 132         char *oldpath = NULL;
 133         char *windir = NULL;
 134         WSADATA wsa;
 135
 136         val = WSAStartup(MAKEWORD(2, 2), &wsa);
 137         if (val != 0) {
 138                 win_perror2("WSAStartup", val);
 139                 return 1;
 140         }
 141
 142
 143 #ifndef _WIN64
 144         // This dirty hack works around the WOW64 file system redirector[1], which would prevent
 145         // us from calling programs residing in %windir%\System32 when running on a 64bit system
 146         // (since nmrpflash is currently shipped as 32bit only).
 147         //
 148         // [1] https://msdn.microsoft.com/en-us/library/windows/desktop/aa384187(v=vs.85).aspx
 149
 150         oldpath = getenv("PATH");
 151         windir = getenv("WINDIR");
 152         if (oldpath && windir) {
 153                 newpath = malloc(strlen(oldpath) + strlen(windir) + 32);
 154                 sprintf(newpath, "%s;%s\\Sysnative", oldpath, windir);
 155                 SetEnvironmentVariable("PATH", newpath);
 156                 free(newpath);
 157         }
 158 #endif
 159 #endif
 160
 161         opterr = 0;
 162
 163         while ((c = getopt(argc, argv, "a:c:f:F:i:m:M:p:R:t:T:hLVvU")) != -1) {
 164                 max = 0x7fffffff;
 165                 switch (c) {
 166                         case 'a':
 167                                 args.ipaddr = optarg;
 168                                 break;
 169                         case 'c':
 170                                 args.tftpcmd = optarg;
 171                                 break;
 172                         case 'f':
 173                                 args.file_local = optarg;
 174                                 break;
 175                         case 'F':
 176                                 args.file_remote = optarg;
 177                                 break;
 178                         case 'i':
 179                                 args.intf = optarg;
 180                                 break;
 181                         case 'm':
 182                                 args.mac = optarg;
 183                                 break;
 184                         case 'M':
 185                                 args.ipmask = optarg;
 186                                 break;
 187 #ifdef NMRPFLASH_SET_REGION
 188                         case 'R':
 189                                 args.region = optarg;
 190                                 break;
 191 #endif
 192                         case 'p':
 193                         case 'T':
 194                         case 't':
 195                                 if (c == 'p') {
 196                                         max = 0xffff;
 197                                 }
 198
 199                                 val = atoi(optarg);
 200                                 if (val <= 0 || val > max) {
 201                                         fprintf(stderr, "Invalid numeric value for -%c.\n", c);
 202                                         return 1;
 203                                 }
 204
 205                                 if (c == 'p') {
 206                                         args.port = val;
 207                                 } else if (c == 't') {
 208                                         args.rx_timeout = val;
 209                                 } else if (c == 'T') {
 210                                         args.ul_timeout = val * 1000;
 211                                 }
 212
 213                                 break;
 214                         case 'V':
 215                                 printf("nmrpflash %s\n", NMRPFLASH_VERSION);
 216                                 val = 0;
 217                                 goto out;
 218                         case 'v':
 219                                 ++verbosity;
 220                                 break;
 221                         case 'L':
 222                                 list = 1;
 223                                 break;
 224                                 goto out;
 225                         case 'h':
 226                                 usage(stdout);
 227                                 val = 0;
 228                                 goto out;
 229 #ifdef NMRPFLASH_TFTP_TEST
 230                         case 'U':
 231                                 if (args.ipaddr && args.file_local) {
 232                                         val = tftp_put(&args);
 233                                         goto out;
 234                                 }
 235                                 /* fall through */
 236 #endif
 237                         default:
 238                                 usage(stderr);
 239                                 val = 1;
 240                                 goto out;
 241                 }
 242         }
 243
 244         if (!list && ((!args.file_local && !args.tftpcmd) || !args.intf || !args.ipaddr)) {
 245                 usage(stderr);
 246                 return 1;
 247         }
 248
 249         require_admin();
 250         val = !list ? nmrp_do(&args) : ethsock_list_all();
 251
 252 out:
 253 #ifdef NMRPFLASH_WINDOWS
 254         WSACleanup();
 255 #endif
 256         return val;
 257 }