macsec_linux: Add a driver for macsec on Linux kernels

This uses libnl3 to communicate with the macsec module available on
Linux. A recent enough version of libnl is needed for the macsec.h file
(which is not yet available in a formal libnl release at the time of
this commit).

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>

src/drivers/driver.h

@@ -5050,6 +5050,10 @@ extern const struct wpa_driver_ops wpa_driver_wired_ops; /* driver_wired.c */
 /* driver_macsec_qca.c */
 extern const struct wpa_driver_ops wpa_driver_macsec_qca_ops;
 #endif /* CONFIG_DRIVER_MACSEC_QCA */
+#ifdef CONFIG_DRIVER_MACSEC_LINUX
+/* driver_macsec_linux.c */
+extern const struct wpa_driver_ops wpa_driver_macsec_linux_ops;
+#endif /* CONFIG_DRIVER_MACSEC_LINUX */
 #ifdef CONFIG_DRIVER_ROBOSWITCH
 /* driver_roboswitch.c */
 extern const struct wpa_driver_ops wpa_driver_roboswitch_ops;

src/drivers/drivers.c

@@ -34,6 +34,9 @@ const struct wpa_driver_ops *const wpa_drivers[] =
 #ifdef CONFIG_DRIVER_WIRED
 	&wpa_driver_wired_ops,
 #endif /* CONFIG_DRIVER_WIRED */
+#ifdef CONFIG_DRIVER_MACSEC_LINUX
+	&wpa_driver_macsec_linux_ops,
+#endif /* CONFIG_DRIVER_MACSEC_LINUX */
 #ifdef CONFIG_DRIVER_MACSEC_QCA
 	&wpa_driver_macsec_qca_ops,
 #endif /* CONFIG_DRIVER_MACSEC_QCA */

src/drivers/drivers.mak

@@ -18,6 +18,13 @@ DRV_OBJS += ../src/drivers/driver_wired.o
 NEED_DRV_WIRED_COMMON=1
 endif
 
+ifdef CONFIG_DRIVER_MACSEC_LINUX
+DRV_CFLAGS += -DCONFIG_DRIVER_MACSEC_LINUX
+DRV_OBJS += ../src/drivers/driver_macsec_linux.o
+NEED_DRV_WIRED_COMMON=1
+CONFIG_LIBNL3_ROUTE=y
+endif
+
 ifdef CONFIG_DRIVER_MACSEC_QCA
 DRV_CFLAGS += -DCONFIG_DRIVER_MACSEC_QCA
 DRV_OBJS += ../src/drivers/driver_macsec_qca.o

src/drivers/drivers.mk

@@ -18,6 +18,13 @@ DRV_OBJS += src/drivers/driver_wired.c
 NEED_DRV_WIRED_COMMON=1
 endif
 
+ifdef CONFIG_DRIVER_MACSEC_LINUX
+DRV_CFLAGS += -DCONFIG_DRIVER_MACSEC_LINUX
+DRV_OBJS += src/drivers/driver_macsec_linux.c
+NEED_DRV_WIRED_COMMON=1
+CONFIG_LIBNL3_ROUTE=y
+endif
+
 ifdef NEED_DRV_WIRED_COMMON
 DRV_OBJS += src/drivers/driver_wired_common.c
 endif

src/pae/ieee802_1x_kay.c

@@ -379,6 +379,17 @@ ieee802_1x_kay_get_cipher_suite(struct ieee802_1x_mka_participant *participant,
 }
 
 
+u64 mka_sci_u64(struct ieee802_1x_mka_sci *sci)
+{
+	struct ieee802_1x_mka_sci tmp;
+
+	os_memcpy(tmp.addr, sci->addr, ETH_ALEN);
+	tmp.port = sci->port;
+
+	return *((u64 *) &tmp);
+}
+
+
 static Boolean sci_equal(const struct ieee802_1x_mka_sci *a,
 			 const struct ieee802_1x_mka_sci *b)
 {

src/pae/ieee802_1x_kay.h

@@ -231,6 +231,8 @@ struct ieee802_1x_kay {
 };
 
 
+u64 mka_sci_u64(struct ieee802_1x_mka_sci *sci);
+
 struct ieee802_1x_kay *
 ieee802_1x_kay_init(struct ieee802_1x_kay_ctx *ctx, enum macsec_policy policy,
 		    u16 port, const char *ifname, const u8 *addr);