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-rw-r--r--gpxe/src/net/cachedhcp.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/gpxe/src/net/cachedhcp.c b/gpxe/src/net/cachedhcp.c
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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 <gpxe/dhcp.h>
+#include <gpxe/dhcppkt.h>
+#include <gpxe/netdevice.h>
+#include <gpxe/iobuf.h>
+#include <gpxe/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" );
+}