src/hci/commands/dhcp_cmd.c

   1 /*
   2  * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdint.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <errno.h>
  24 #include <stddef.h>
  25 #include <string.h>
  26 #include <assert.h>
  27 #include <getopt.h>
  28 #include <gpxe/netdevice.h>
  29 #include <gpxe/command.h>
  30 #include <usr/dhcpmgmt.h>
  31
  32 /** @file
  33  *
  34  * DHCP management commands
  35  *
  36  */
  37
  38 /**
  39  * "dhcp" command syntax message
  40  *
  41  * @v argv              Argument list
  42  */
  43 static void dhcp_syntax ( char **argv ) {
  44         printf ( "Usage:\n"
  45                  "  %s <interface>\n"
  46                  "\n"
  47                  "Configure a network interface using DHCP\n",
  48                  argv[0] );
  49 }
  50
  51 /**
  52  * The "dhcp" command
  53  *
  54  * @v argc              Argument count
  55  * @v argv              Argument list
  56  * @ret rc              Exit code
  57  */
  58 static int dhcp_exec ( int argc, char **argv ) {
  59         static struct option longopts[] = {
  60                 { "help", 0, NULL, 'h' },
  61                 { NULL, 0, NULL, 0 },
  62         };
  63         const char *name;
  64         struct net_device *netdev;
  65         int c;
  66         int rc;
  67
  68         /* Parse options */
  69         while ( ( c = getopt_long ( argc, argv, "h", longopts, NULL ) ) >= 0 ){
  70                 switch ( c ) {
  71                 case 'h':
  72                         /* Display help text */
  73                 default:
  74                         /* Unrecognised/invalid option */
  75                         dhcp_syntax ( argv );
  76                         return 1;
  77                 }
  78         }
  79
  80         /* Need exactly one interface name remaining after the options */
  81         if ( optind != ( argc - 1 ) ) {
  82                 dhcp_syntax ( argv );
  83                 return 1;
  84         }
  85         name = argv[optind];
  86
  87         /* Perform DHCP */
  88         netdev = find_netdev ( name );
  89         if ( ! netdev ) {
  90                 printf ( "No such interface: %s\n", name );
  91                 return 1;
  92         }
  93         if ( ( rc = dhcp ( netdev ) ) != 0 ) {
  94                 printf ( "Could not configure %s: %s\n", netdev->name,
  95                          strerror ( rc ) );
  96                 return 1;
  97         }
  98
  99         return 0;
 100 }
 101
 102 /** DHCP management commands */
 103 struct command dhcp_commands[] __command = {
 104         {
 105                 .name = "dhcp",
 106                 .exec = dhcp_exec,
 107         },
 108 };