From 26f3a09ccf99244fffc4aad23b7bda78c3d9dd21 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Wed, 21 Nov 2007 03:29:53 +0000
Subject: Add UUID to DHCP request as option 97 (if available).

---
 src/net/udp/dhcp.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/net')

diff --git a/src/net/udp/dhcp.c b/src/net/udp/dhcp.c
index 8e34ccb6c..8504d8988 100644
--- a/src/net/udp/dhcp.c
+++ b/src/net/udp/dhcp.c
@@ -31,6 +31,7 @@
 #include <gpxe/retry.h>
 #include <gpxe/tcpip.h>
 #include <gpxe/ip.h>
+#include <gpxe/uuid.h>
 #include <gpxe/dhcp.h>
 
 /** @file
@@ -529,6 +530,7 @@ int create_dhcp_request ( struct net_device *netdev, int msgtype,
 	struct device_description *desc = &netdev->dev->desc;
 	struct dhcp_netdev_desc dhcp_desc;
 	struct dhcp_client_id client_id;
+	union uuid uuid;
 	size_t dhcp_features_len;
 	size_t ll_addr_len;
 	int rc;
@@ -604,6 +606,17 @@ int create_dhcp_request ( struct net_device *netdev, int msgtype,
 		return rc;
 	}
 
+	/* Add client UUID, if we have one.  Required for PXE. */
+	if ( ( rc = get_uuid ( &uuid ) ) == 0 ) {
+		if ( ( rc = set_dhcp_packet_option ( dhcppkt,
+						     DHCP_CLIENT_UUID, &uuid,
+						     sizeof ( uuid ) ) ) !=0){
+			DBG ( "DHCP could not set client UUID: %s\n",
+			      strerror ( rc ) );
+			return rc;
+		}
+	}
+
 	return 0;
 }
 
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