Add UUID to DHCP request as option 97 (if available).

[people/mcb30/gpxe.git] / src / net / udp / dhcp.c

diff --git a/src/net/udp/dhcp.c b/src/net/udp/dhcp.c
index 8e34ccb..8504d89 100644 (file)
--- 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;
 }