Add mesh_group_{add,remove} control interface commands

Parse MESH_GROUP_ADD/REMOVE commands on ctrl interface and call
wpa_supplicant routines. These commands are used to start or
join and leave a mesh network.

The mesh id is given in the configuration file, therefore there is
no need to scan before joining a mesh network. We reuse the
connect_without_scan construct used by P2P for that same purpose.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: Javier Lopez <jlopex@gmail.com>

src/common/wpa_ctrl.h

@@ -121,6 +121,8 @@ extern "C" {
 #define WPS_EVENT_ER_SET_SEL_REG "WPS-ER-AP-SET-SEL-REG "
 
 /* MESH events */
+#define MESH_GROUP_STARTED "MESH-GROUP-STARTED "
+#define MESH_GROUP_REMOVED "MESH-GROUP-REMOVED "
 #define MESH_PEER_CONNECTED "MESH-PEER-CONNECTED "
 #define MESH_PEER_DISCONNECTED "MESH-PEER-DISCONNECTED "
 

wpa_supplicant/ctrl_iface.c

@@ -2365,6 +2365,77 @@ static int wpa_supplicant_ctrl_iface_scan_results(
 }
 
 
+#ifdef CONFIG_MESH
+
+static int wpa_supplicant_ctrl_iface_mesh_group_add(
+	struct wpa_supplicant *wpa_s, char *cmd)
+{
+	int id;
+	struct wpa_ssid *ssid;
+
+	id = atoi(cmd);
+	wpa_printf(MSG_DEBUG, "CTRL_IFACE: MESH_GROUP_ADD id=%d", id);
+
+	ssid = wpa_config_get_network(wpa_s->conf, id);
+	if (ssid == NULL) {
+		wpa_printf(MSG_DEBUG,
+			   "CTRL_IFACE: Could not find network id=%d", id);
+		return -1;
+	}
+	if (ssid->mode != WPAS_MODE_MESH) {
+		wpa_printf(MSG_DEBUG,
+			   "CTRL_IFACE: Cannot use MESH_GROUP_ADD on a non mesh network");
+		return -1;
+	}
+
+	/*
+	 * TODO: If necessary write our own group_add function,
+	 * for now we can reuse select_network
+	 */
+	wpa_supplicant_select_network(wpa_s, ssid);
+
+	return 0;
+}
+
+
+static int wpa_supplicant_ctrl_iface_mesh_group_remove(
+	struct wpa_supplicant *wpa_s, char *cmd)
+{
+	if (!cmd) {
+		wpa_printf(MSG_ERROR,
+			   "CTRL_IFACE: MESH_GROUP_REMOVE ifname cannot be empty");
+		return -1;
+	}
+
+	/*
+	 * TODO: Support a multiple mesh and other iface type combinations
+	 */
+	if (os_strcmp(cmd, wpa_s->ifname) != 0) {
+		wpa_printf(MSG_DEBUG,
+			   "CTRL_IFACE: MESH_GROUP_REMOVE unknown interface name: %s",
+			   cmd);
+		return -1;
+	}
+
+	wpa_printf(MSG_DEBUG, "CTRL_IFACE: MESH_GROUP_REMOVE ifname=%s", cmd);
+
+	wpa_s->reassociate = 0;
+	wpa_s->disconnected = 1;
+	wpa_supplicant_cancel_sched_scan(wpa_s);
+	wpa_supplicant_cancel_scan(wpa_s);
+
+	/*
+	 * TODO: If necessary write our own group_remove function,
+	 * for now we can reuse deauthenticate
+	 */
+	wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
+
+	return 0;
+}
+
+#endif /* CONFIG_MESH */
+
+
 static int wpa_supplicant_ctrl_iface_select_network(
 	struct wpa_supplicant *wpa_s, char *cmd)
 {
@@ -6904,6 +6975,15 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 		if (wpa_supplicant_ctrl_iface_ibss_rsn(wpa_s, buf + 9))
 			reply_len = -1;
 #endif /* CONFIG_IBSS_RSN */
+#ifdef CONFIG_MESH
+	} else if (os_strncmp(buf, "MESH_GROUP_ADD ", 15) == 0) {
+		if (wpa_supplicant_ctrl_iface_mesh_group_add(wpa_s, buf + 15))
+			reply_len = -1;
+	} else if (os_strncmp(buf, "MESH_GROUP_REMOVE ", 18) == 0) {
+		if (wpa_supplicant_ctrl_iface_mesh_group_remove(wpa_s,
+								buf + 18))
+			reply_len = -1;
+#endif /* CONFIG_MESH */
 #ifdef CONFIG_P2P
 	} else if (os_strncmp(buf, "P2P_FIND ", 9) == 0) {
 		if (p2p_ctrl_find(wpa_s, buf + 9))

wpa_supplicant/wpa_cli.c

@@ -1752,6 +1752,24 @@ static int wpa_cli_cmd_roam(struct wpa_ctrl *ctrl, int argc, char *argv[])
 }
 
 
+#ifdef CONFIG_MESH
+
+static int wpa_cli_cmd_mesh_group_add(struct wpa_ctrl *ctrl, int argc,
+				      char *argv[])
+{
+	return wpa_cli_cmd(ctrl, "MESH_GROUP_ADD", 1, argc, argv);
+}
+
+
+static int wpa_cli_cmd_mesh_group_remove(struct wpa_ctrl *ctrl, int argc,
+					 char *argv[])
+{
+	return wpa_cli_cmd(ctrl, "MESH_GROUP_REMOVE", 1, argc, argv);
+}
+
+#endif /* CONFIG_MESH */
+
+
 #ifdef CONFIG_P2P
 
 static int wpa_cli_cmd_p2p_find(struct wpa_ctrl *ctrl, int argc, char *argv[])
@@ -2781,6 +2799,14 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "roam", wpa_cli_cmd_roam, wpa_cli_complete_bss,
 	  cli_cmd_flag_none,
 	  "<addr> = roam to the specified BSS" },
+#ifdef CONFIG_MESH
+	{ "mesh_group_add", wpa_cli_cmd_mesh_group_add, NULL,
+	  cli_cmd_flag_none,
+	  "<network id> = join a mesh network (disable others)" },
+	{ "mesh_group_remove", wpa_cli_cmd_mesh_group_remove, NULL,
+	  cli_cmd_flag_none,
+	  "<ifname> = Remove mesh group interface" },
+#endif /* CONFIG_MESH */
 #ifdef CONFIG_P2P
 	{ "p2p_find", wpa_cli_cmd_p2p_find, wpa_cli_complete_p2p_find,
 	  cli_cmd_flag_none,

wpa_supplicant/wpa_supplicant.c

@@ -52,6 +52,7 @@
 #include "hs20_supplicant.h"
 #include "wnm_sta.h"
 #include "wpas_kay.h"
+#include "mesh.h"
 
 const char *wpa_supplicant_version =
 "wpa_supplicant v" VERSION_STR "\n"
@@ -1532,6 +1533,31 @@ void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 		return;
 	}
 
+	if (ssid->mode == WPAS_MODE_MESH) {
+#ifdef CONFIG_MESH
+		if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MESH)) {
+			wpa_msg(wpa_s, MSG_INFO,
+				"Driver does not support mesh mode");
+			return;
+		}
+		if (bss)
+			ssid->frequency = bss->freq;
+		if (wpa_supplicant_join_mesh(wpa_s, ssid) < 0) {
+			wpa_msg(wpa_s, MSG_ERROR, "Could not join mesh");
+			return;
+		}
+		wpa_s->current_bss = bss;
+		wpa_msg_ctrl(wpa_s, MSG_INFO, MESH_GROUP_STARTED
+			     "ssid=\"%s\" id=%d",
+			     wpa_ssid_txt(ssid->ssid, ssid->ssid_len),
+			     ssid->id);
+#else /* CONFIG_MESH */
+		wpa_msg(wpa_s, MSG_ERROR,
+			"mesh mode support not included in the build");
+#endif /* CONFIG_MESH */
+		return;
+	}
+
 #ifdef CONFIG_TDLS
 	if (bss)
 		wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1),
@@ -1879,8 +1905,9 @@ static void wpas_start_assoc_cb(struct wpa_radio_work *work, int deinit)
 		params.fixed_bssid = 1;
 	}
 
-	if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
-	    params.freq.freq == 0) {
+	/* Initial frequency for IBSS/mesh */
+	if ((ssid->mode == WPAS_MODE_IBSS || ssid->mode == WPAS_MODE_MESH) &&
+	    ssid->frequency > 0 && params.freq.freq == 0) {
 		enum hostapd_hw_mode hw_mode;
 		u8 channel;
 
@@ -2143,6 +2170,14 @@ void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
 	wpa_tdls_teardown_peers(wpa_s->wpa);
 #endif /* CONFIG_TDLS */
 
+#ifdef CONFIG_MESH
+	if (wpa_s->ifmsh) {
+		wpa_msg_ctrl(wpa_s, MSG_INFO, MESH_GROUP_REMOVED "%s",
+			     wpa_s->ifname);
+		wpa_supplicant_leave_mesh(wpa_s);
+	}
+#endif /* CONFIG_MESH */
+
 	if (addr) {
 		wpa_drv_deauthenticate(wpa_s, addr, reason_code);
 		os_memset(&event, 0, sizeof(event));
@@ -2308,8 +2343,12 @@ void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
 	if (ssid) {
 		wpa_s->current_ssid = ssid;
 		eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
+		wpa_s->connect_without_scan =
+			(ssid->mode == WPAS_MODE_MESH) ? ssid : NULL;
+	} else {
+		wpa_s->connect_without_scan = NULL;
 	}
-	wpa_s->connect_without_scan = NULL;
+
 	wpa_s->disconnected = 0;
 	wpa_s->reassociate = 1;
 
@@ -3928,6 +3967,13 @@ static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
 		wpa_s->ctrl_iface = NULL;
 	}
 
+#ifdef CONFIG_MESH
+	if (wpa_s->ifmsh) {
+		wpa_supplicant_mesh_iface_deinit(wpa_s, wpa_s->ifmsh);
+		wpa_s->ifmsh = NULL;
+	}
+#endif /* CONFIG_MESH */
+
 	if (wpa_s->conf != NULL) {
 		wpa_config_free(wpa_s->conf);
 		wpa_s->conf = NULL;