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/*
* Copyright (C) 2009 Joshua Oreman <oremanj@rwcr.net>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ipxe/dhcp.h>
#include <ipxe/dhcppkt.h>
#include <ipxe/netdevice.h>
#include <ipxe/iobuf.h>
#include <ipxe/uaccess.h>
/** @file
*
* Cached DHCP packet handling
*
*/
/**
* Store cached DHCPACK packet
*
* @v data User pointer to cached DHCP packet data
* @v len Length of cached DHCP packet data
* @ret rc Return status code
*
* This function should be called by the architecture-specific
* get_cached_dhcpack() handler.
*/
void store_cached_dhcpack ( userptr_t data, size_t len ) {
struct dhcp_packet *dhcppkt;
struct dhcphdr *dhcphdr;
struct settings *parent;
int rc;
/* Create DHCP packet */
dhcppkt = zalloc ( sizeof ( *dhcppkt ) + len );
if ( ! dhcppkt )
return;
/* Fill in data for DHCP packet */
dhcphdr = ( ( ( void * ) dhcppkt ) + sizeof ( * dhcppkt ) );
copy_from_user ( dhcphdr, data, 0, len );
dhcppkt_init ( dhcppkt, dhcphdr, len );
DBG_HD ( dhcppkt->options.data, dhcppkt->options.len );
/* Register settings on the last opened network device.
* This will have the effect of registering cached settings
* with a network device when "dhcp netX" is performed for that
* device, which is usually what we want.
*/
parent = netdev_settings ( last_opened_netdev() );
if ( ( rc = register_settings ( &dhcppkt->settings, parent ) ) != 0 )
DBG ( "DHCP could not register cached settings: %s\n",
strerror ( rc ) );
dhcppkt_put ( dhcppkt );
DBG ( "DHCP registered cached settings\n" );
}
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