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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.used_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,
- DHCP_SETTINGS_NAME ) ) != 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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