Add FEATURE() macro, plus code to display features at startup time,

[people/sha0/gpxe.git] / src / net / udp / dhcp.c

diff --git a/src/net/udp/dhcp.c b/src/net/udp/dhcp.c
index f8f59e2..ed45563 100644 (file)
--- a/src/net/udp/dhcp.c
+++ b/src/net/udp/dhcp.c
@@ -70,6 +70,10 @@ static uint8_t dhcp_request_options_data[] = {
        DHCP_END
 };
 
+/** DHCP feature codes */
+static uint8_t dhcp_features[0] __table_start ( uint8_t, dhcp_features );
+static uint8_t dhcp_features_end[0] __table_end ( uint8_t, dhcp_features );
+
 /**
  * Name a DHCP packet type
  *
@@ -508,6 +512,7 @@ int create_dhcp_request ( struct net_device *netdev, int msgtype,
                          struct dhcp_packet *dhcppkt ) {
        struct device_description *desc = &netdev->dev->desc;
        struct dhcp_netdev_desc dhcp_desc;
+       size_t dhcp_features_len;
        int rc;
 
        /* Create DHCP packet */
@@ -544,6 +549,16 @@ int create_dhcp_request ( struct net_device *netdev, int msgtype,
                }
        }
 
+       /* Add options to identify the feature list */
+       dhcp_features_len = ( dhcp_features_end - dhcp_features );
+       if ( ( rc = set_dhcp_packet_option ( dhcppkt, DHCP_EB_ENCAP,
+                                            dhcp_features,
+                                            dhcp_features_len ) ) != 0 ) {
+               DBG ( "DHCP could not set features list option: %s\n",
+                     strerror ( rc ) );
+               return rc;
+       }
+
        /* Add options to identify the network device */
        dhcp_desc.type = desc->bus_type;
        dhcp_desc.vendor = htons ( desc->vendor );