FT: Replace inter-AP protocol with use of OUI Extended Ethertype

Replace the previously used extension of IEEE 802.11 managed Ethertype
89-0d (originally added for Remote Request/Response in IEEE 802.11r)
with Ethertype 88-b7 (OUI Extended EtherType) for FT inter-AP
communication. The new design uses a more properly assigned identifier
for the messages.

This assigns the OUI 00:13:74 vendor-specific subtype 0x0001 for the new
hostapd AP-to-AP communication purposes. Subtypes 1 (PULL), 2 (RESP),
and 3 (PUSH) are also assigned in this commit for the R0KH-R1KH
protocol.

This breaks backward compatibility, i.e., hostapd needs to be updated on
all APs at the same time to allow FT to remain functional.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>

hostapd/Android.mk

@@ -252,6 +252,12 @@ OBJS += src/ap/wpa_auth_ft.c
 NEED_SHA256=y
 NEED_AES_OMAC1=y
 NEED_AES_UNWRAP=y
+NEED_ETH_P_OUI=y
+endif
+
+ifdef NEED_ETH_P_OUI
+L_CFLAGS += -DCONFIG_ETH_P_OUI
+OBJS += src/ap/eth_p_oui.c
 endif
 
 ifdef CONFIG_SAE

hostapd/Makefile

@@ -295,6 +295,12 @@ OBJS += ../src/ap/wpa_auth_ft.o
 NEED_SHA256=y
 NEED_AES_OMAC1=y
 NEED_AES_UNWRAP=y
+NEED_ETH_P_OUI=y
+endif
+
+ifdef NEED_ETH_P_OUI
+CFLAGS += -DCONFIG_ETH_P_OUI
+OBJS += ../src/ap/eth_p_oui.o
 endif
 
 ifdef CONFIG_SAE

hostapd/main.c

@@ -666,6 +666,9 @@ int main(int argc, char *argv[])
 	interfaces.global_iface_name = NULL;
 	interfaces.global_ctrl_sock = -1;
 	dl_list_init(&interfaces.global_ctrl_dst);
+#ifdef CONFIG_ETH_P_OUI
+	dl_list_init(&interfaces.eth_p_oui);
+#endif /* CONFIG_ETH_P_OUI */
 
 	for (;;) {
 		c = getopt(argc, argv, "b:Bde:f:hi:KP:sSTtu:vg:G:");

src/ap/eth_p_oui.c

@@ -0,0 +1,191 @@
+/*
+ * hostapd / IEEE 802 OUI Extended EtherType 88-B7
+ * Copyright (c) 2016, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "utils/eloop.h"
+#include "l2_packet/l2_packet.h"
+#include "hostapd.h"
+#include "eth_p_oui.h"
+
+/*
+ * See IEEE Std 802-2014, Clause 9.2.4 for the definition of the OUI Extended
+ * EtherType 88-B7. This file implements this with OUI 00:13:74 and
+ * vendor-specific subtype 0x0001.
+ */
+static const u8 global_oui[] = { 0x00, 0x13, 0x74, 0x00, 0x01 };
+
+struct eth_p_oui_iface {
+	struct dl_list list;
+	char ifname[IFNAMSIZ + 1];
+	struct l2_packet_data *l2;
+	struct dl_list receiver;
+};
+
+struct eth_p_oui_ctx {
+	struct dl_list list;
+	struct eth_p_oui_iface *iface;
+	/* all data needed to deliver and unregister */
+	u8 oui_suffix; /* last byte of OUI */
+	void (*rx_callback)(void *ctx, const u8 *src_addr,
+			    const u8 *dst_addr, u8 oui_suffix,
+			    const u8 *buf, size_t len);
+	void *rx_callback_ctx;
+};
+
+
+void eth_p_oui_deliver(struct eth_p_oui_ctx *ctx, const u8 *src_addr,
+		       const u8 *dst_addr, const u8 *buf, size_t len)
+{
+	ctx->rx_callback(ctx->rx_callback_ctx, src_addr, dst_addr,
+			 ctx->oui_suffix, buf, len);
+}
+
+
+static void eth_p_rx(void *ctx, const u8 *src_addr, const u8 *buf, size_t len)
+{
+	struct eth_p_oui_iface *iface = ctx;
+	struct eth_p_oui_ctx *receiver;
+	const struct l2_ethhdr *ethhdr;
+
+	if (len < sizeof(*ethhdr) + sizeof(global_oui) + 1) {
+		/* too short packet */
+		return;
+	}
+
+	ethhdr = (struct l2_ethhdr *) buf;
+	/* trim eth_hdr from buf and len */
+	buf += sizeof(*ethhdr);
+	len -= sizeof(*ethhdr);
+
+	/* verify OUI and vendor-specific subtype match */
+	if (os_memcmp(buf, global_oui, sizeof(global_oui)) != 0)
+		return;
+	buf += sizeof(global_oui);
+	len -= sizeof(global_oui);
+
+	dl_list_for_each(receiver, &iface->receiver,
+			 struct eth_p_oui_ctx, list) {
+		if (buf[0] != receiver->oui_suffix)
+			continue;
+
+		eth_p_oui_deliver(receiver, ethhdr->h_source, ethhdr->h_dest,
+				  buf + 1, len - 1);
+	}
+}
+
+
+struct eth_p_oui_ctx *
+eth_p_oui_register(struct hostapd_data *hapd, const char *ifname, u8 oui_suffix,
+		   void (*rx_callback)(void *ctx, const u8 *src_addr,
+				       const u8 *dst_addr, u8 oui_suffix,
+				       const u8 *buf, size_t len),
+		   void *rx_callback_ctx)
+{
+	struct eth_p_oui_iface *iface;
+	struct eth_p_oui_ctx *receiver;
+	int found = 0;
+	struct hapd_interfaces *interfaces;
+
+	receiver = os_zalloc(sizeof(*receiver));
+	if (!receiver)
+		goto err;
+
+	receiver->oui_suffix = oui_suffix;
+	receiver->rx_callback = rx_callback;
+	receiver->rx_callback_ctx = rx_callback_ctx;
+
+	interfaces = hapd->iface->interfaces;
+
+	dl_list_for_each(iface, &interfaces->eth_p_oui, struct eth_p_oui_iface,
+			 list) {
+		if (os_strcmp(iface->ifname, ifname) != 0)
+			continue;
+		found = 1;
+		break;
+	}
+
+	if (!found) {
+		iface = os_zalloc(sizeof(*iface));
+		if (!iface)
+			goto err;
+
+		os_strlcpy(iface->ifname, ifname, sizeof(iface->ifname));
+		iface->l2 = l2_packet_init(ifname, NULL, ETH_P_OUI, eth_p_rx,
+					   iface, 1);
+		if (!iface->l2) {
+			os_free(iface);
+			goto err;
+		}
+		dl_list_init(&iface->receiver);
+
+		dl_list_add_tail(&interfaces->eth_p_oui, &iface->list);
+	}
+
+	dl_list_add_tail(&iface->receiver, &receiver->list);
+	receiver->iface = iface;
+
+	return receiver;
+err:
+	os_free(receiver);
+	return NULL;
+}
+
+
+void eth_p_oui_unregister(struct eth_p_oui_ctx *ctx)
+{
+	struct eth_p_oui_iface *iface;
+
+	if (!ctx)
+		return;
+
+	iface = ctx->iface;
+
+	dl_list_del(&ctx->list);
+	os_free(ctx);
+
+	if (dl_list_empty(&iface->receiver)) {
+		dl_list_del(&iface->list);
+		l2_packet_deinit(iface->l2);
+		os_free(iface);
+	}
+}
+
+
+int eth_p_oui_send(struct eth_p_oui_ctx *ctx, const u8 *src_addr,
+		   const u8 *dst_addr, const u8 *buf, size_t len)
+{
+	struct eth_p_oui_iface *iface = ctx->iface;
+	u8 *packet, *p;
+	size_t packet_len;
+	int ret;
+	struct l2_ethhdr *ethhdr;
+
+	packet_len = sizeof(*ethhdr) + sizeof(global_oui) + 1 + len;
+	packet = os_zalloc(packet_len);
+	if (!packet)
+		return -1;
+	p = packet;
+
+	ethhdr = (struct l2_ethhdr *) packet;
+	os_memcpy(ethhdr->h_source, src_addr, ETH_ALEN);
+	os_memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN);
+	ethhdr->h_proto = host_to_be16(ETH_P_OUI);
+	p += sizeof(*ethhdr);
+
+	os_memcpy(p, global_oui, sizeof(global_oui));
+	p[sizeof(global_oui)] = ctx->oui_suffix;
+	p += sizeof(global_oui) + 1;
+
+	os_memcpy(p, buf, len);
+
+	ret = l2_packet_send(iface->l2, NULL, 0, packet, packet_len);
+	os_free(packet);
+	return ret;
+}

src/ap/eth_p_oui.h

@@ -0,0 +1,28 @@
+/*
+ * hostapd / IEEE 802 OUI Extended Ethertype
+ * Copyright (c) 2016, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#ifndef ETH_P_OUI_H
+#define ETH_P_OUI_H
+
+struct eth_p_oui_ctx;
+struct hostapd_data;
+
+/* rx_callback only gets payload after OUI passed as buf */
+struct eth_p_oui_ctx *
+eth_p_oui_register(struct hostapd_data *hapd, const char *ifname, u8 oui_suffix,
+		   void (*rx_callback)(void *ctx, const u8 *src_addr,
+				       const u8 *dst_addr, u8 oui_suffix,
+				       const u8 *buf, size_t len),
+		   void *rx_callback_ctx);
+void eth_p_oui_unregister(struct eth_p_oui_ctx *eth_p_oui);
+int eth_p_oui_send(struct eth_p_oui_ctx *ctx, const u8 *src_addr,
+		   const u8 *dst_addr, const u8 *buf, size_t len);
+void eth_p_oui_deliver(struct eth_p_oui_ctx *ctx, const u8 *src_addr,
+		       const u8 *dst_addr, const u8 *buf, size_t len);
+
+#endif /* ETH_P_OUI_H */

src/ap/hostapd.c

@@ -2019,6 +2019,7 @@ hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 	hapd->dhcp_sock = -1;
 #ifdef CONFIG_IEEE80211R_AP
 	dl_list_init(&hapd->l2_queue);
+	dl_list_init(&hapd->l2_oui_queue);
 #endif /* CONFIG_IEEE80211R_AP */
 
 	return hapd;

src/ap/hostapd.h

@@ -53,6 +53,9 @@ struct hapd_interfaces {
 #ifndef CONFIG_NO_VLAN
 	struct dynamic_iface *vlan_priv;
 #endif /* CONFIG_NO_VLAN */
+#ifdef CONFIG_ETH_P_OUI
+	struct dl_list eth_p_oui; /* OUI Extended EtherType handlers */
+#endif /* CONFIG_ETH_P_OUI */
 	int eloop_initialized;
 };
 
@@ -188,6 +191,10 @@ struct hostapd_data {
 
 #ifdef CONFIG_IEEE80211R_AP
 	struct dl_list l2_queue;
+	struct dl_list l2_oui_queue;
+	struct eth_p_oui_ctx *oui_pull;
+	struct eth_p_oui_ctx *oui_resp;
+	struct eth_p_oui_ctx *oui_push;
 #endif /* CONFIG_IEEE80211R_AP */
 
 	struct wps_context *wps;

src/ap/wpa_auth.h

@@ -37,10 +37,12 @@ struct ft_rrb_frame {
 
 #define FT_PACKET_REQUEST 0
 #define FT_PACKET_RESPONSE 1
-/* Vendor-specific types for R0KH-R1KH protocol; not defined in 802.11r */
+
-#define FT_PACKET_R0KH_R1KH_PULL 200
+/* Vendor-specific types for R0KH-R1KH protocol; not defined in 802.11r. These
-#define FT_PACKET_R0KH_R1KH_RESP 201
+ * use OUI Extended EtherType as the encapsulating format. */
-#define FT_PACKET_R0KH_R1KH_PUSH 202
+#define FT_PACKET_R0KH_R1KH_PULL 0x01
+#define FT_PACKET_R0KH_R1KH_RESP 0x02
+#define FT_PACKET_R0KH_R1KH_PUSH 0x03
 
 #define FT_R0KH_R1KH_PULL_NONCE_LEN 16
 #define FT_R0KH_R1KH_PULL_DATA_LEN (FT_R0KH_R1KH_PULL_NONCE_LEN + \
@@ -49,11 +51,6 @@ struct ft_rrb_frame {
 #define FT_R0KH_R1KH_PULL_PAD_LEN ((8 - FT_R0KH_R1KH_PULL_DATA_LEN % 8) % 8)
 
 struct ft_r0kh_r1kh_pull_frame {
-	u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
-	u8 packet_type; /* FT_PACKET_R0KH_R1KH_PULL */
-	le16 data_length; /* little endian length of data (44) */
-	u8 ap_address[ETH_ALEN];
-
 	u8 nonce[FT_R0KH_R1KH_PULL_NONCE_LEN];
 	u8 pmk_r0_name[WPA_PMK_NAME_LEN];
 	u8 r1kh_id[FT_R1KH_ID_LEN];
@@ -67,11 +64,6 @@ struct ft_r0kh_r1kh_pull_frame {
 				    WPA_PMK_NAME_LEN + 2)
 #define FT_R0KH_R1KH_RESP_PAD_LEN ((8 - FT_R0KH_R1KH_RESP_DATA_LEN % 8) % 8)
 struct ft_r0kh_r1kh_resp_frame {
-	u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
-	u8 packet_type; /* FT_PACKET_R0KH_R1KH_RESP */
-	le16 data_length; /* little endian length of data (78) */
-	u8 ap_address[ETH_ALEN];
-
 	u8 nonce[FT_R0KH_R1KH_PULL_NONCE_LEN]; /* copied from pull */
 	u8 r1kh_id[FT_R1KH_ID_LEN]; /* copied from pull */
 	u8 s1kh_id[ETH_ALEN]; /* copied from pull */
@@ -87,11 +79,6 @@ struct ft_r0kh_r1kh_resp_frame {
 				    WPA_PMK_NAME_LEN + 2)
 #define FT_R0KH_R1KH_PUSH_PAD_LEN ((8 - FT_R0KH_R1KH_PUSH_DATA_LEN % 8) % 8)
 struct ft_r0kh_r1kh_push_frame {
-	u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
-	u8 packet_type; /* FT_PACKET_R0KH_R1KH_PUSH */
-	le16 data_length; /* little endian length of data (82) */
-	u8 ap_address[ETH_ALEN];
-
 	/* Encrypted with AES key-wrap */
 	u8 timestamp[4]; /* current time in seconds since unix epoch, little
 			  * endian */
@@ -226,6 +213,8 @@ struct wpa_auth_callbacks {
 						  void *ctx), void *cb_ctx);
 	int (*send_ether)(void *ctx, const u8 *dst, u16 proto, const u8 *data,
 			  size_t data_len);
+	int (*send_oui)(void *ctx, const u8 *dst, u8 oui_suffix, const u8 *data,
+			size_t data_len);
 #ifdef CONFIG_IEEE80211R_AP
 	struct wpa_state_machine * (*add_sta)(void *ctx, const u8 *sta_addr);
 	int (*send_ft_action)(void *ctx, const u8 *dst,
@@ -345,6 +334,9 @@ u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len);
 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
 		  const u8 *data, size_t data_len);
+void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
+		       const u8 *dst_addr, u8 oui_suffix, const u8 *data,
+		       size_t data_len);
 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr);
 #endif /* CONFIG_IEEE80211R_AP */
 

src/ap/wpa_auth_ft.c

@@ -41,6 +41,19 @@ static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
 }
 
 
+static int wpa_ft_rrb_oui_send(struct wpa_authenticator *wpa_auth,
+			       const u8 *dst, u8 oui_suffix,
+			       const u8 *data, size_t data_len)
+{
+	if (!wpa_auth->cb->send_oui)
+		return -1;
+	wpa_printf(MSG_DEBUG, "FT: RRB-OUI type %u send to " MACSTR,
+		   oui_suffix, MAC2STR(dst));
+	return wpa_auth->cb->send_oui(wpa_auth->cb_ctx, dst, oui_suffix, data,
+				      data_len);
+}
+
+
 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
 			      const u8 *dst, const u8 *data, size_t data_len)
 {
@@ -337,11 +350,6 @@ static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
 		   "address " MACSTR, MAC2STR(r0kh->addr));
 
 	os_memset(&frame, 0, sizeof(frame));
-	frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
-	frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
-	frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
-	os_memcpy(frame.ap_address, sm->wpa_auth->addr, ETH_ALEN);
-
 	/* aes_wrap() does not support inplace encryption, so use a temporary
 	 * buffer for the data. */
 	if (random_get_bytes(f.nonce, FT_R0KH_R1KH_PULL_NONCE_LEN)) {
@@ -366,7 +374,8 @@ static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
 	if (sm->ft_pending_req_ies == NULL)
 		return -1;
 
-	wpa_ft_rrb_send(sm->wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
+	wpa_ft_rrb_oui_send(sm->wpa_auth, r0kh->addr, FT_PACKET_R0KH_R1KH_PULL,
+			    (u8 *) &frame, sizeof(frame));
 
 	return 0;
 }
@@ -1470,11 +1479,6 @@ static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
 		   MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
 
 	os_memset(&resp, 0, sizeof(resp));
-	resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
-	resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
-	resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
-	os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
-
 	/* aes_wrap() does not support inplace encryption, so use a temporary
 	 * buffer for the data. */
 	os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
@@ -1507,7 +1511,8 @@ static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
 
 	os_memset(pmk_r0, 0, PMK_LEN);
 
-	wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
+	wpa_ft_rrb_oui_send(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_RESP,
+			    (u8 *) &resp, sizeof(resp));
 
 	return 0;
 }
@@ -1746,13 +1751,6 @@ int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
 		return -1;
 	}
 
-	if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
-		return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
-	if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
-		return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
-	if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
-		return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
-
 	wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
 
 	if (alen < 1 + 1 + 2 * ETH_ALEN) {
@@ -1830,6 +1828,43 @@ int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
 }
 
 
+void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
+		       const u8 *dst_addr, u8 oui_suffix, const u8 *data,
+		       size_t data_len)
+{
+	wpa_printf(MSG_DEBUG, "FT: RRB-OUI received frame from remote AP "
+		   MACSTR, MAC2STR(src_addr));
+	wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame - oui_suffix=%d", oui_suffix);
+
+	if (is_multicast_ether_addr(src_addr)) {
+		wpa_printf(MSG_DEBUG,
+			   "FT: RRB-OUI received frame from multicast address "
+			   MACSTR, MAC2STR(src_addr));
+		return;
+	}
+
+	if (is_multicast_ether_addr(dst_addr)) {
+		wpa_printf(MSG_DEBUG,
+			   "FT: RRB-OUI received frame from remote AP " MACSTR
+			   " to multicast address " MACSTR,
+			   MAC2STR(src_addr), MAC2STR(dst_addr));
+		return;
+	}
+
+	switch (oui_suffix) {
+	case FT_PACKET_R0KH_R1KH_PULL:
+		wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
+		break;
+	case FT_PACKET_R0KH_R1KH_RESP:
+		wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
+		break;
+	case FT_PACKET_R0KH_R1KH_PUSH:
+		wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
+		break;
+	}
+}
+
+
 static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
 				  struct wpa_ft_pmk_r0_sa *pmk_r0,
 				  struct ft_remote_r1kh *r1kh,
@@ -1841,11 +1876,6 @@ static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
 	u8 *crypt;
 
 	os_memset(&frame, 0, sizeof(frame));
-	frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
-	frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
-	frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
-	os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
-
 	/* aes_wrap() does not support inplace encryption, so use a temporary
 	 * buffer for the data. */
 	os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
@@ -1871,7 +1901,8 @@ static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
 		     plain, crypt) < 0)
 		return -1;
 
-	wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
+	wpa_ft_rrb_oui_send(wpa_auth, r1kh->addr, FT_PACKET_R0KH_R1KH_PUSH,
+			    (u8 *) &frame, sizeof(frame));
 	return 0;
 }
 

src/ap/wpa_auth_glue.c

@@ -19,6 +19,7 @@
 #include "eapol_auth/eapol_auth_sm_i.h"
 #include "eap_server/eap.h"
 #include "l2_packet/l2_packet.h"
+#include "eth_p_oui.h"
 #include "hostapd.h"
 #include "ieee802_1x.h"
 #include "preauth_auth.h"
@@ -565,6 +566,152 @@ static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto,
 }
 
 
+#ifdef CONFIG_ETH_P_OUI
+static struct eth_p_oui_ctx * hostapd_wpa_get_oui(struct hostapd_data *hapd,
+						  u8 oui_suffix)
+{
+	switch (oui_suffix) {
+#ifdef CONFIG_IEEE80211R_AP
+	case FT_PACKET_R0KH_R1KH_PULL:
+		return hapd->oui_pull;
+	case FT_PACKET_R0KH_R1KH_RESP:
+		return hapd->oui_resp;
+	case FT_PACKET_R0KH_R1KH_PUSH:
+		return hapd->oui_push;
+#endif /* CONFIG_IEEE80211R_AP */
+	default:
+		return NULL;
+	}
+}
+#endif /* CONFIG_ETH_P_OUI */
+
+
+#ifdef CONFIG_IEEE80211R_AP
+
+struct oui_deliver_later_data {
+	struct dl_list list;
+	u8 src_addr[ETH_ALEN];
+	u8 dst_addr[ETH_ALEN];
+	size_t data_len;
+	u8 oui_suffix;
+	/* followed by data_len octets of data */
+};
+
+static void hostapd_oui_deliver_later(void *eloop_ctx, void *timeout_ctx)
+{
+	struct hostapd_data *hapd = eloop_ctx;
+	struct oui_deliver_later_data *data, *n;
+	struct eth_p_oui_ctx *oui_ctx;
+
+	dl_list_for_each_safe(data, n, &hapd->l2_oui_queue,
+			      struct oui_deliver_later_data, list) {
+		oui_ctx = hostapd_wpa_get_oui(hapd, data->oui_suffix);
+		if (hapd->wpa_auth && oui_ctx) {
+			eth_p_oui_deliver(oui_ctx, data->src_addr,
+					  data->dst_addr,
+					  (const u8 *) (data + 1),
+					  data->data_len);
+		}
+		dl_list_del(&data->list);
+		os_free(data);
+	}
+}
+
+
+struct wpa_auth_oui_iface_iter_data {
+	struct hostapd_data *src_hapd;
+	const u8 *dst_addr;
+	const u8 *data;
+	size_t data_len;
+	u8 oui_suffix;
+};
+
+static int hostapd_wpa_auth_oui_iter(struct hostapd_iface *iface, void *ctx)
+{
+	struct wpa_auth_oui_iface_iter_data *idata = ctx;
+	struct oui_deliver_later_data *data;
+	struct hostapd_data *hapd;
+	size_t j;
+
+	for (j = 0; j < iface->num_bss; j++) {
+		hapd = iface->bss[j];
+		if (hapd == idata->src_hapd)
+			continue;
+		if (!is_multicast_ether_addr(idata->dst_addr) &&
+		    os_memcmp(hapd->own_addr, idata->dst_addr, ETH_ALEN) != 0)
+			continue;
+
+		/* defer eth_p_oui_deliver until next eloop step as this is
+		 * when it would be triggerd from reading from sock
+		 * This avoids
+		 * hapd0:send -> hapd1:recv -> hapd1:send -> hapd0:recv,
+		 * that is calling hapd0:recv handler from within
+		 * hapd0:send directly.
+		 */
+		data = os_zalloc(sizeof(*data) + idata->data_len);
+		if (!data)
+			return 1;
+
+		os_memcpy(data->src_addr, idata->src_hapd->own_addr, ETH_ALEN);
+		os_memcpy(data->dst_addr, idata->dst_addr, ETH_ALEN);
+		os_memcpy(data + 1, idata->data, idata->data_len);
+		data->data_len = idata->data_len;
+		data->oui_suffix = idata->oui_suffix;
+
+		dl_list_add(&hapd->l2_oui_queue, &data->list);
+
+		if (!eloop_is_timeout_registered(hostapd_oui_deliver_later,
+						 hapd, NULL))
+			eloop_register_timeout(0, 0,
+					       hostapd_oui_deliver_later,
+					       hapd, NULL);
+
+		return 1;
+	}
+
+	return 0;
+}
+
+#endif /* CONFIG_IEEE80211R_AP */
+
+
+static int hostapd_wpa_auth_send_oui(void *ctx, const u8 *dst, u8 oui_suffix,
+				     const u8 *data, size_t data_len)
+{
+#ifdef CONFIG_ETH_P_OUI
+	struct hostapd_data *hapd = ctx;
+	struct eth_p_oui_ctx *oui_ctx;
+
+#ifdef CONFIG_IEEE80211R_AP
+	if (hapd->iface->interfaces &&
+	    hapd->iface->interfaces->for_each_interface) {
+		struct wpa_auth_oui_iface_iter_data idata;
+		int res;
+
+		idata.src_hapd = hapd;
+		idata.dst_addr = dst;
+		idata.data = data;
+		idata.data_len = data_len;
+		idata.oui_suffix = oui_suffix;
+		res = hapd->iface->interfaces->for_each_interface(
+			hapd->iface->interfaces, hostapd_wpa_auth_oui_iter,
+			&idata);
+		if (res == 1)
+			return data_len;
+	}
+#endif /* CONFIG_IEEE80211R_AP */
+
+	oui_ctx = hostapd_wpa_get_oui(hapd, oui_suffix);
+	if (!oui_ctx)
+		return -1;
+
+	return eth_p_oui_send(oui_ctx, hapd->own_addr, dst, data, data_len);
+#else /* CONFIG_ETH_P_OUI */
+	return -1;
+#endif /* CONFIG_ETH_P_OUI */
+}
+
+
 #ifdef CONFIG_IEEE80211R_AP
 
 static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst,
@@ -643,6 +790,22 @@ static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf,
 }
 
 
+static void hostapd_rrb_oui_receive(void *ctx, const u8 *src_addr,
+				    const u8 *dst_addr, u8 oui_suffix,
+				    const u8 *buf, size_t len)
+{
+	struct hostapd_data *hapd = ctx;
+
+	wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> "
+		   MACSTR, MAC2STR(src_addr), MAC2STR(dst_addr));
+	if (!is_multicast_ether_addr(dst_addr) &&
+	    os_memcmp(hapd->own_addr, dst_addr, ETH_ALEN) != 0)
+		return;
+	wpa_ft_rrb_oui_rx(hapd->wpa_auth, src_addr, dst_addr, oui_suffix, buf,
+			  len);
+}
+
+
 static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr,
 				      u8 *tspec_ie, size_t tspec_ielen)
 {
@@ -650,6 +813,42 @@ static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr,
 	return hostapd_add_tspec(hapd, sta_addr, tspec_ie, tspec_ielen);
 }
 
+
+
+static int hostapd_wpa_register_ft_oui(struct hostapd_data *hapd,
+				       const char *ft_iface)
+{
+	hapd->oui_pull = eth_p_oui_register(hapd, ft_iface,
+					    FT_PACKET_R0KH_R1KH_PULL,
+					    hostapd_rrb_oui_receive, hapd);
+	if (!hapd->oui_pull)
+		return -1;
+
+	hapd->oui_resp = eth_p_oui_register(hapd, ft_iface,
+					    FT_PACKET_R0KH_R1KH_RESP,
+					    hostapd_rrb_oui_receive, hapd);
+	if (!hapd->oui_resp)
+		return -1;
+
+	hapd->oui_push = eth_p_oui_register(hapd, ft_iface,
+					    FT_PACKET_R0KH_R1KH_PUSH,
+					    hostapd_rrb_oui_receive, hapd);
+	if (!hapd->oui_push)
+		return -1;
+
+	return 0;
+}
+
+
+static void hostapd_wpa_unregister_ft_oui(struct hostapd_data *hapd)
+{
+	eth_p_oui_unregister(hapd->oui_pull);
+	hapd->oui_pull = NULL;
+	eth_p_oui_unregister(hapd->oui_resp);
+	hapd->oui_resp = NULL;
+	eth_p_oui_unregister(hapd->oui_push);
+	hapd->oui_push = NULL;
+}
 #endif /* CONFIG_IEEE80211R_AP */
 
 
@@ -671,6 +870,7 @@ int hostapd_setup_wpa(struct hostapd_data *hapd)
 		.for_each_sta = hostapd_wpa_auth_for_each_sta,
 		.for_each_auth = hostapd_wpa_auth_for_each_auth,
 		.send_ether = hostapd_wpa_auth_send_ether,
+		.send_oui = hostapd_wpa_auth_send_oui,
 #ifdef CONFIG_IEEE80211R_AP
 		.send_ft_action = hostapd_wpa_auth_send_ft_action,
 		.add_sta = hostapd_wpa_auth_add_sta,
@@ -713,9 +913,11 @@ int hostapd_setup_wpa(struct hostapd_data *hapd)
 #ifdef CONFIG_IEEE80211R_AP
 	if (!hostapd_drv_none(hapd) &&
 	    wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt)) {
-		hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ?
+		const char *ft_iface;
-					  hapd->conf->bridge :
+
-					  hapd->conf->iface, NULL, ETH_P_RRB,
+		ft_iface = hapd->conf->bridge[0] ? hapd->conf->bridge :
+			   hapd->conf->iface;
+		hapd->l2 = l2_packet_init(ft_iface, NULL, ETH_P_RRB,
 					  hostapd_rrb_receive, hapd, 1);
 		if (hapd->l2 == NULL &&
 		    (hapd->driver == NULL ||
@@ -724,6 +926,12 @@ int hostapd_setup_wpa(struct hostapd_data *hapd)
 				   "interface");
 			return -1;
 		}
+
+		if (hostapd_wpa_register_ft_oui(hapd, ft_iface)) {
+			wpa_printf(MSG_ERROR,
+				   "Failed to open ETH_P_OUI interface");
+			return -1;
+		}
 	}
 #endif /* CONFIG_IEEE80211R_AP */
 
@@ -766,7 +974,10 @@ void hostapd_deinit_wpa(struct hostapd_data *hapd)
 #ifdef CONFIG_IEEE80211R_AP
 	eloop_cancel_timeout(hostapd_wpa_ft_rrb_rx_later, hapd, ELOOP_ALL_CTX);
 	hostapd_wpa_ft_rrb_rx_later(hapd, NULL); /* flush without delivering */
+	eloop_cancel_timeout(hostapd_oui_deliver_later, hapd, ELOOP_ALL_CTX);
+	hostapd_oui_deliver_later(hapd, NULL); /* flush without delivering */
 	l2_packet_deinit(hapd->l2);
 	hapd->l2 = NULL;
+	hostapd_wpa_unregister_ft_oui(hapd);
 #endif /* CONFIG_IEEE80211R_AP */
 }

src/utils/common.h

@@ -331,6 +331,9 @@ static inline void WPA_PUT_LE64(u8 *a, u64 val)
 #ifndef ETH_P_RRB
 #define ETH_P_RRB 0x890D
 #endif /* ETH_P_RRB */
+#ifndef ETH_P_OUI
+#define ETH_P_OUI 0x88B7
+#endif /* ETH_P_OUI */
 
 
 #ifdef __GNUC__