From 0acb0168408c9e8e8fd843221bb57d1c3a39fb3d Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Thu, 2 Aug 2007 04:24:39 +0100
Subject: Add FEATURE() macro, plus code to display features at startup time,
 and generate DHCP options to indicate features to DHCP server (and to PXE
 NBPs).

---
 src/net/aoe.c       |  3 +++
 src/net/tcp/iscsi.c |  3 +++
 src/net/udp/dhcp.c  | 15 +++++++++++++++
 3 files changed, 21 insertions(+)

(limited to 'src/net')

diff --git a/src/net/aoe.c b/src/net/aoe.c
index fd82665d1..5536ae8da 100644
--- a/src/net/aoe.c
+++ b/src/net/aoe.c
@@ -31,6 +31,7 @@
 #include <gpxe/ata.h>
 #include <gpxe/netdevice.h>
 #include <gpxe/process.h>
+#include <gpxe/features.h>
 #include <gpxe/aoe.h>
 
 /** @file
@@ -39,6 +40,8 @@
  *
  */
 
+FEATURE ( "AoE", DHCP_EB_FEATURE_AOE );
+
 struct net_protocol aoe_protocol;
 
 /** List of all AoE sessions */
diff --git a/src/net/tcp/iscsi.c b/src/net/tcp/iscsi.c
index e64591713..5d8639e7d 100644
--- a/src/net/tcp/iscsi.c
+++ b/src/net/tcp/iscsi.c
@@ -32,6 +32,7 @@
 #include <gpxe/uaccess.h>
 #include <gpxe/tcpip.h>
 #include <gpxe/dhcp.h>
+#include <gpxe/features.h>
 #include <gpxe/iscsi.h>
 
 /** @file
@@ -40,6 +41,8 @@
  *
  */
 
+FEATURE ( "iSCSI", DHCP_EB_FEATURE_ISCSI );
+
 /** iSCSI initiator name (explicitly specified) */
 static char *iscsi_explicit_initiator_iqn;
 
diff --git a/src/net/udp/dhcp.c b/src/net/udp/dhcp.c
index f8f59e2e4..ed4556329 100644
--- 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 );
-- 
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