[fc] Allow FLOGI response to be sent to newly-assigned peer port ID

The response to a received FLOGI should probably be sent to the peer
port ID assigned as a result of the WWPN comparison.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/fc.h

@@ -16,6 +16,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #include <ipxe/tables.h>
 #include <ipxe/interface.h>
 #include <ipxe/retry.h>
+#include <ipxe/socket.h>
 
 /******************************************************************************
  *
@@ -40,6 +41,27 @@ struct fc_port_id {
 /** Length of Fibre Channel port identifier next */
 #define FC_PORT_ID_STRLEN 9 /* "xx.xx.xx" */
 
+/**
+ * Fibre Channel socket address
+ */
+struct sockaddr_fc {
+	/** Socket address family (part of struct @c sockaddr)
+	 *
+	 * Always set to @c AF_FC for Fibre Channel addresses
+	 */
+	sa_family_t sfc_family;
+	/** Port ID */
+	struct fc_port_id sfc_port_id;
+	/** Padding
+	 *
+	 * This ensures that a struct @c sockaddr_tcpip is large
+	 * enough to hold a socket address for any TCP/IP address
+	 * family.
+	 */
+	char pad[ sizeof ( struct sockaddr ) - sizeof ( sa_family_t )
+					     - sizeof ( struct fc_port_id ) ];
+} __attribute__ (( may_alias ));
+
 extern struct fc_port_id fc_empty_port_id;
 extern struct fc_port_id fc_f_port_id;
 extern struct fc_port_id fc_ptp_low_port_id;

src/include/ipxe/socket.h

@@ -54,6 +54,7 @@ socket_semantics_name ( int semantics ) {
  */
 #define AF_INET		1	/**< IPv4 Internet addresses */
 #define AF_INET6	2	/**< IPv6 Internet addresses */
+#define AF_FC		3	/**< Fibre Channel addresses */
 /** @} */
 
 /**