1 files changed, 69 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/arch/i386/interface/pxeparent/pxeparent_dhcp.c b/contrib/syslinux-4.02/gpxe/src/arch/i386/interface/pxeparent/pxeparent_dhcp.c
new file mode 100644
index 0000000..6605943
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/arch/i386/interface/pxeparent/pxeparent_dhcp.c
@@ -0,0 +1,69 @@
+/*
+ * 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 <string.h>
+#include <gpxe/dhcp.h>
+#include <gpxe/netdevice.h>
+#include <undipreload.h>
+#include <pxeparent.h>
+#include <realmode.h>
+#include <pxe_api.h>
+
+/**
+ * Present cached DHCP packet if it exists
+ */
+void __weak_impl ( get_cached_dhcpack ) ( void ) {
+	struct undi_device *undi;
+	struct s_PXENV_GET_CACHED_INFO get_cached_info;
+	int rc;
+
+	/* Use preloaded UNDI device to get at PXE entry point */
+	undi = &preloaded_undi;
+	if ( ! undi->entry.segment ) {
+		DBG ( "PXEDHCP no preloaded UNDI device found\n" );
+		return;
+	}
+
+	/* Check that stack is available to get cached info */
+	if ( ! ( undi->flags & UNDI_FL_KEEP_ALL ) ) {
+		DBG ( "PXEDHCP stack was unloaded, no cache available\n" );
+		return;
+	}
+
+	/* Obtain cached DHCP packet */
+	memset ( &get_cached_info, 0, sizeof ( get_cached_info ) );
+	get_cached_info.PacketType = PXENV_PACKET_TYPE_DHCP_ACK;
+
+	if ( ( rc = pxeparent_call ( undi->entry, PXENV_GET_CACHED_INFO,
+				     &get_cached_info,
+				     sizeof ( get_cached_info ) ) ) != 0 ) {
+		DBG ( "PXEDHCP GET_CACHED_INFO failed: %s\n", strerror ( rc ) );
+		return;
+	}
+
+	DBG ( "PXEDHCP got cached info at %04x:%04x length %d\n",
+	      get_cached_info.Buffer.segment, get_cached_info.Buffer.offset,
+	      get_cached_info.BufferSize );
+
+	/* Present cached DHCP packet */
+	store_cached_dhcpack ( real_to_user ( get_cached_info.Buffer.segment,
+					      get_cached_info.Buffer.offset ),
+			       get_cached_info.BufferSize );
+}