diff --git a/src/core/open.c b/src/core/open.c
index 284d00a9..b61160eb 100644
--- a/src/core/open.c
+++ b/src/core/open.c
@@ -75,30 +75,29 @@ int xfer_open_uri ( struct xfer_interface *xfer, const char *uri_string ) {
  * Open socket
  *
  * @v xfer		Data transfer interface
- * @v domain		Communication domain (e.g. PF_INET)
- * @v type		Communication semantics (e.g. SOCK_STREAM)
+ * @v semantics		Communication semantics (e.g. SOCK_STREAM)
  * @v peer		Peer socket address
  * @v local		Local socket address, or NULL
  * @ret rc		Return status code
  */
-int xfer_open_socket ( struct xfer_interface *xfer,
-		       int domain, int type, struct sockaddr *peer,
-		       struct sockaddr *local ) {
+int xfer_open_socket ( struct xfer_interface *xfer, int semantics,
+		       struct sockaddr *peer, struct sockaddr *local ) {
 	struct socket_opener *opener;
 
 	DBGC ( xfer, "XFER %p opening (%s,%s) socket\n", xfer,
-	       socket_domain_name ( domain ), socket_type_name ( type ) );
+	       socket_semantics_name ( semantics ),
+	       socket_family_name ( peer->sa_family ) );
 
 	for ( opener = socket_openers; opener < socket_openers_end; opener++ ){
-		if ( ( opener->domain == domain ) &&
-		     ( opener->type == type ) ) {
+		if ( ( opener->semantics == semantics ) &&
+		     ( opener->family == peer->sa_family ) ) {
 			return opener->open ( xfer, peer, local );
 		}
 	}
 
 	DBGC ( xfer, "XFER %p attempted to open unsupported socket type "
-	       "(%s,%s)\n", xfer, socket_domain_name ( domain ),
-	       socket_type_name ( type ) );
+	       "(%s,%s)\n", xfer, socket_semantics_name ( semantics ),
+	       socket_family_name ( peer->sa_family ) );
 	return -ENOTSUP;
 }
 
@@ -117,12 +116,11 @@ int xfer_vopen ( struct xfer_interface *xfer, int type, va_list args ) {
 
 		return xfer_open_uri ( xfer, uri_string ); }
 	case LOCATION_SOCKET: {
-		int domain = va_arg ( args, int );
-		int type = va_arg ( args, int );
+		int semantics = va_arg ( args, int );
 		struct sockaddr *peer = va_arg ( args, struct sockaddr * );
 		struct sockaddr *local = va_arg ( args, struct sockaddr * );
 
-		return xfer_open_socket ( xfer, domain, type, peer, local ); }
+		return xfer_open_socket ( xfer, semantics, peer, local ); }
 	default:
 		DBGC ( xfer, "XFER %p attempted to open unsupported location "
 		       "type %d\n", xfer, type );
diff --git a/src/include/gpxe/open.h b/src/include/gpxe/open.h
index 229d2d78..b16bbe88 100644
--- a/src/include/gpxe/open.h
+++ b/src/include/gpxe/open.h
@@ -26,7 +26,9 @@ enum {
 	 *
 	 * Parameter list for open() is:
 	 *
-	 * 
+	 * int semantics;
+	 * struct sockaddr *peer;
+	 * struct sockaddr *local;
 	 */
 	LOCATION_SOCKET,
 };
@@ -56,10 +58,10 @@ struct uri_opener {
 
 /** A socket opener */
 struct socket_opener {
-	/** Communication domain (e.g. PF_INET) */
-	int domain;
 	/** Communication semantics (e.g. SOCK_STREAM) */
-	int type;
+	int semantics;
+	/** Address family (e.g. AF_INET) */
+	int family;
 	/** Open socket
 	 *
 	 * @v xfer		Data transfer interface
@@ -76,9 +78,11 @@ struct socket_opener {
 
 extern int xfer_open_uri ( struct xfer_interface *xfer,
 			   const char *uri_string );
-extern int xfer_open_socket ( struct xfer_interface *xfer,
-			      int domain, int type, struct sockaddr *peer,
-			      struct sockaddr *local );
+extern int xfer_open_named_socket ( struct xfer_interface *xfer,
+				    int semantics, struct sockaddr *peer,
+				    const char *name, struct sockaddr *local );
+extern int xfer_open_socket ( struct xfer_interface *xfer, int semantics,
+			      struct sockaddr *peer, struct sockaddr *local );
 extern int xfer_vopen ( struct xfer_interface *xfer, int type, va_list args );
 extern int xfer_open ( struct xfer_interface *xfer, int type, ... );
 
diff --git a/src/include/gpxe/socket.h b/src/include/gpxe/socket.h
index ea602537..d47369aa 100644
--- a/src/include/gpxe/socket.h
+++ b/src/include/gpxe/socket.h
@@ -8,31 +8,7 @@
  */
 
 /**
- * @defgroup commdomains Communication domains
- *
- * @{
- */
-#define PF_INET		1	/**< IPv4 Internet protocols */
-#define PF_INET6	2	/**< IPv6 Internet protocols */
-/** @} */
-
-/**
- * Name communication domain
- *
- * @v domain		Communication domain (e.g. PF_INET)
- * @ret name		Name of communication domain
- */
-static inline __attribute__ (( always_inline )) const char *
-socket_domain_name ( int domain ) {
-	switch ( domain ) {
-	case PF_INET:		return "PF_INET";
-	case PF_INET6:		return "PF_INET6";
-	default:		return "PF_UNKNOWN";
-	}
-}
-
-/**
- * @defgroup commtypes Communication types
+ * @defgroup commtypes Communication semantics
  *
  * @{
  */
@@ -41,14 +17,14 @@ socket_domain_name ( int domain ) {
 /** @} */
 
 /**
- * Name communication type
+ * Name communication semantics
  *
- * @v type		Communication type (e.g. SOCK_STREAM)
- * @ret name		Name of communication type
+ * @v semantics		Communication semantics (e.g. SOCK_STREAM)
+ * @ret name		Name of communication semantics
  */
 static inline __attribute__ (( always_inline )) const char *
-socket_type_name ( int type ) {
-	switch ( type ) {
+socket_semantics_name ( int semantics ) {
+	switch ( semantics ) {
 	case SOCK_STREAM:	return "SOCK_STREAM";
 	case SOCK_DGRAM:	return "SOCK_DGRAM";
 	default:		return "SOCK_UNKNOWN";
@@ -64,6 +40,21 @@ socket_type_name ( int type ) {
 #define AF_INET6	2	/**< IPv6 Internet addresses */
 /** @} */
 
+/**
+ * Name address family
+ *
+ * @v family		Address family (e.g. AF_INET)
+ * @ret name		Name of address family
+ */
+static inline __attribute__ (( always_inline )) const char *
+socket_family_name ( int family ) {
+	switch ( family ) {
+	case AF_INET:		return "AF_INET";
+	case AF_INET6:		return "AF_INET6";
+	default:		return "AF_UNKNOWN";
+	}
+}
+
 /** A socket address family */
 typedef uint16_t sa_family_t;