src/usr/dhcpmgmt.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 FILE_LICENCE ( GPL2_OR_LATER );
  20
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <errno.h>
  24 #include <gpxe/netdevice.h>
  25 #include <gpxe/dhcp.h>
  26 #include <gpxe/monojob.h>
  27 #include <gpxe/process.h>
  28 #include <usr/ifmgmt.h>
  29 #include <usr/dhcpmgmt.h>
  30
  31 #define LINK_WAIT_MS    15000
  32
  33 /** @file
  34  *
  35  * DHCP management
  36  *
  37  */
  38
  39 int dhcp ( struct net_device *netdev ) {
  40         uint8_t *chaddr;
  41         uint8_t hlen;
  42         uint16_t flags;
  43         int rc;
  44
  45         /* Check we can open the interface first */
  46         if ( ( rc = ifopen ( netdev ) ) != 0 )
  47                 return rc;
  48
  49         /* Wait for link-up */
  50         if ( ( rc = iflinkwait ( netdev, LINK_WAIT_MS ) ) != 0 )
  51                 return rc;
  52
  53         /* Perform DHCP */
  54         chaddr = dhcp_chaddr ( netdev, &hlen, &flags );
  55         printf ( "DHCP (%s ", netdev->name );
  56         while ( hlen-- )
  57                 printf ( "%02x%c", *(chaddr++), ( hlen ? ':' : ')' ) );
  58
  59         if ( ( rc = start_dhcp ( &monojob, netdev ) ) == 0 ) {
  60                 rc = monojob_wait ( "" );
  61         } else if ( rc > 0 ) {
  62                 printf ( " using cached\n" );
  63                 rc = 0;
  64         }
  65
  66         return rc;
  67 }
  68
  69 int pxebs ( struct net_device *netdev, unsigned int pxe_type ) {
  70         int rc;
  71
  72         /* Perform PXE Boot Server Discovery */
  73         printf ( "PXEBS (%s type %d)", netdev->name, pxe_type );
  74         if ( ( rc = start_pxebs ( &monojob, netdev, pxe_type ) ) == 0 )
  75                 rc = monojob_wait ( "" );
  76
  77         return rc;
  78 }