main.c

   1 /**
   2  * nmrp-flash - Netgear Unbrick Utility
   3  * Copyright (C) 2016 Joseph Lehner <joseph.c.lehner@gmail.com>
   4  *
   5  * nmrp-flash 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  * nmrp-flash 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 nmrp-flash.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #include <getopt.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include "nmrpd.h"
  24
  25 void usage(FILE *fp)
  26 {
  27         fprintf(fp,
  28                         "Usage: nmrp-flash [OPTIONS...]\n"
  29                         "\n"
  30                         "Options (-a, -i and -f are mandatory):\n"
  31                         " -a <ipaddr>     IP address to assign to target device\n"
  32                         " -f <firmware>   Firmware file\n"
  33                         " -i <interface>  Network interface directly connected to device\n"
  34                         " -m <mac>        MAC address of target device (xx:xx:xx:xx:xx:xx)\n"
  35                         " -M <netmask>    Subnet mask to assign to target device\n"
  36                         " -t <timeout>    Timeout (in milliseconds) for regular messages\n"
  37                         " -T <timeout>    Time to wait after successfull TFTP upload\n"
  38                         " -p <port>       Port to use for TFTP upload\n"
  39                         " -V              Print version and exit\n"
  40                         " -h              Show this screen\n"
  41                         "\n"
  42                         "Example:\n"
  43                         "\n"
  44                         "$ sudo nmrp-flash -a 192.168.1.254 -i eth0 -f firmware.bin\n"
  45                         "\n"
  46                         "nmrp-flash v%s, Copyright (C) 2016 Joseph C. Lehner\n"
  47                         "nmrp-flash is free software, licensed under the GNU GPLv3.\n"
  48                         "Source code at https://github.com/jclehner/nmrp-flash\n"
  49                         "\n",
  50                         NMRPD_VERSION
  51           );
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56         int c, val, max;
  57         struct nmrpd_args args = {
  58                 .rx_timeout = 200,
  59                 .ul_timeout = 60000,
  60                 .filename = NULL,
  61                 .ipaddr = NULL,
  62                 .ipmask = "255.255.255.0",
  63                 .intf = NULL,
  64                 .mac = "ff:ff:ff:ff:ff:ff",
  65                 .op = NMRP_UPLOAD_FW,
  66                 .port = 69,
  67                 .force_root = 1
  68         };
  69
  70         opterr = 0;
  71
  72         while ((c = getopt(argc, argv, "a:f:i:m:M:p:t:T:hV")) != -1) {
  73                 max = 0xffffffff;
  74                 switch (c) {
  75                         case 'a':
  76                                 args.ipaddr = optarg;
  77                                 break;
  78                         case 'f':
  79                                 args.filename = optarg;
  80                                 break;
  81                         case 'i':
  82                                 args.intf = optarg;
  83                                 break;
  84                         case 'm':
  85                                 args.mac = optarg;
  86                                 break;
  87                         case 'M':
  88                                 args.ipmask = optarg;
  89                                 break;
  90                         case 'p':
  91                                 max = 0xffff;
  92                         case 'T':
  93                         case 't':
  94                                 val = atoi(optarg);
  95                                 if (val <= 0 || val > max) {
  96                                         fprintf(stderr, "Invalid numeric value for -%c.\n", c);
  97                                         return 1;
  98                                 }
  99
 100                                 if (c == 'p') {
 101                                         args.port = val;
 102                                 } else if (c == 't') {
 103                                         args.rx_timeout = val;
 104                                 } else {
 105                                         args.ul_timeout = val;
 106                                 }
 107
 108                                 break;
 109                         case 'V':
 110                                 printf("nmrp-flash v%s\n", NMRPD_VERSION);
 111                                 return 0;
 112                         case 'h':
 113                                 usage(stdout);
 114                                 return 0;
 115                         default:
 116                                 usage(stderr);
 117                                 return 1;
 118                 }
 119         }
 120
 121         if (!args.filename || !args.intf || !args.ipaddr) {
 122                 usage(stderr);
 123                 return 1;
 124         }
 125
 126         if (geteuid() != 0) {
 127                 fprintf(stderr, "This program must be run as root!\n");
 128                 return 1;
 129         }
 130
 131         return nmrp_do(&args);
 132 }