[thirdparty/hostap.git] / wpa_supplicant / mesh.c

/*
 * WPA Supplicant - Basic mesh mode routines
 * Copyright (c) 2013-2014, cozybit, Inc.  All rights reserved.
 *
 * 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 "utils/uuid.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "ap/sta_info.h"
#include "ap/hostapd.h"
#include "ap/ieee802_11.h"
#include "config_ssid.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "notify.h"
#include "ap.h"
#include "mesh_mpm.h"
#include "mesh_rsn.h"
#include "mesh.h"


static void wpa_supplicant_mesh_deinit(struct wpa_supplicant *wpa_s)
{
	wpa_supplicant_mesh_iface_deinit(wpa_s, wpa_s->ifmsh);
	wpa_s->ifmsh = NULL;
	wpa_s->current_ssid = NULL;
	os_free(wpa_s->mesh_rsn);
	wpa_s->mesh_rsn = NULL;
	/* TODO: leave mesh (stop beacon). This will happen on link down
	 * anyway, so it's not urgent */
}


void wpa_supplicant_mesh_iface_deinit(struct wpa_supplicant *wpa_s,
				      struct hostapd_iface *ifmsh)
{
	if (!ifmsh)
		return;

	if (ifmsh->mconf) {
		mesh_mpm_deinit(wpa_s, ifmsh);
		if (ifmsh->mconf->ies) {
			ifmsh->mconf->ies = NULL;
			/* We cannot free this struct
			 * because wpa_authenticator on
			 * hostapd side is also using it
			 * for now just set to NULL and
			 * let hostapd code free it.
			 */
		}
		os_free(ifmsh->mconf);
		ifmsh->mconf = NULL;
	}

	/* take care of shared data */
	hostapd_interface_deinit(ifmsh);
	hostapd_interface_free(ifmsh);
}


static struct mesh_conf * mesh_config_create(struct wpa_ssid *ssid)
{
	struct mesh_conf *conf;

	conf = os_zalloc(sizeof(struct mesh_conf));
	if (!conf)
		return NULL;

	os_memcpy(conf->meshid, ssid->ssid, ssid->ssid_len);
	conf->meshid_len = ssid->ssid_len;

	if (ssid->key_mgmt & WPA_KEY_MGMT_SAE)
		conf->security |= MESH_CONF_SEC_AUTH |
			MESH_CONF_SEC_AMPE;
	else
		conf->security |= MESH_CONF_SEC_NONE;

	/* defaults */
	conf->mesh_pp_id = MESH_PATH_PROTOCOL_HWMP;
	conf->mesh_pm_id = MESH_PATH_METRIC_AIRTIME;
	conf->mesh_cc_id = 0;
	conf->mesh_sp_id = MESH_SYNC_METHOD_NEIGHBOR_OFFSET;
	conf->mesh_auth_id = (conf->security & MESH_CONF_SEC_AUTH) ? 1 : 0;
	conf->dot11MeshMaxRetries = ssid->dot11MeshMaxRetries;
	conf->dot11MeshRetryTimeout = ssid->dot11MeshRetryTimeout;
	conf->dot11MeshConfirmTimeout = ssid->dot11MeshConfirmTimeout;
	conf->dot11MeshHoldingTimeout = ssid->dot11MeshHoldingTimeout;

	return conf;
}


static void wpas_mesh_copy_groups(struct hostapd_data *bss,
				  struct wpa_supplicant *wpa_s)
{
	int num_groups;
	size_t groups_size;

	for (num_groups = 0; wpa_s->conf->sae_groups[num_groups] > 0;
	     num_groups++)
		;

	groups_size = (num_groups + 1) * sizeof(wpa_s->conf->sae_groups[0]);
	bss->conf->sae_groups = os_malloc(groups_size);
	if (bss->conf->sae_groups)
		os_memcpy(bss->conf->sae_groups, wpa_s->conf->sae_groups,
			  groups_size);
}


static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
				    struct wpa_ssid *ssid)
{
	struct hostapd_iface *ifmsh;
	struct hostapd_data *bss;
	struct hostapd_config *conf;
	struct mesh_conf *mconf;
	int basic_rates_erp[] = { 10, 20, 55, 60, 110, 120, 240, -1 };
	static int default_groups[] = { 19, 20, 21, 25, 26, -1 };
	size_t len;
	int rate_len;

	if (!wpa_s->conf->user_mpm) {
		/* not much for us to do here */
		wpa_msg(wpa_s, MSG_WARNING,
			"user_mpm is not enabled in configuration");
		return 0;
	}

	wpa_s->ifmsh = ifmsh = os_zalloc(sizeof(*wpa_s->ifmsh));
	if (!ifmsh)
		return -ENOMEM;

	ifmsh->drv_flags = wpa_s->drv_flags;
	ifmsh->num_bss = 1;
	ifmsh->bss = os_calloc(wpa_s->ifmsh->num_bss,
			       sizeof(struct hostapd_data *));
	if (!ifmsh->bss)
		goto out_free;

	ifmsh->bss[0] = bss = os_zalloc(sizeof(struct hostapd_data));
	if (!bss)
		goto out_free;

	os_memcpy(bss->own_addr, wpa_s->own_addr, ETH_ALEN);
	bss->driver = wpa_s->driver;
	bss->drv_priv = wpa_s->drv_priv;
	bss->iface = ifmsh;
	bss->mesh_sta_free_cb = mesh_mpm_free_sta;
	wpa_s->assoc_freq = ssid->frequency;
	wpa_s->current_ssid = ssid;

	/* setup an AP config for auth processing */
	conf = hostapd_config_defaults();
	if (!conf)
		goto out_free;

	bss->conf = *conf->bss;
	bss->conf->start_disabled = 1;
	bss->conf->mesh = MESH_ENABLED;
	bss->conf->ap_max_inactivity = wpa_s->conf->mesh_max_inactivity;
	bss->iconf = conf;
	ifmsh->conf = conf;

	ifmsh->bss[0]->max_plinks = wpa_s->conf->max_peer_links;
	os_strlcpy(bss->conf->iface, wpa_s->ifname, sizeof(bss->conf->iface));

	mconf = mesh_config_create(ssid);
	if (!mconf)
		goto out_free;
	ifmsh->mconf = mconf;

	/* need conf->hw_mode for supported rates. */
	if (ssid->frequency == 0) {
		conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
		conf->channel = 1;
	} else {
		conf->hw_mode = ieee80211_freq_to_chan(ssid->frequency,
						       &conf->channel);
	}
	if (conf->hw_mode == NUM_HOSTAPD_MODES) {
		wpa_printf(MSG_ERROR, "Unsupported mesh mode frequency: %d MHz",
			   ssid->frequency);
		goto out_free;
	}

	if (ssid->mesh_basic_rates == NULL) {
		/*
		 * XXX: Hack! This is so an MPM which correctly sets the ERP
		 * mandatory rates as BSSBasicRateSet doesn't reject us. We
		 * could add a new hw_mode HOSTAPD_MODE_IEEE80211G_ERP, but
		 * this is way easier. This also makes our BSSBasicRateSet
		 * advertised in beacons match the one in peering frames, sigh.
		 */
		if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
			conf->basic_rates = os_malloc(sizeof(basic_rates_erp));
			if (!conf->basic_rates)
				goto out_free;
			os_memcpy(conf->basic_rates, basic_rates_erp,
				  sizeof(basic_rates_erp));
		}
	} else {
		rate_len = 0;
		while (1) {
			if (ssid->mesh_basic_rates[rate_len] < 1)
				break;
			rate_len++;
		}
		conf->basic_rates = os_calloc(rate_len + 1, sizeof(int));
		if (conf->basic_rates == NULL)
			goto out_free;
		os_memcpy(conf->basic_rates, ssid->mesh_basic_rates,
			  rate_len * sizeof(int));
		conf->basic_rates[rate_len] = -1;
	}

	if (hostapd_setup_interface(ifmsh)) {
		wpa_printf(MSG_ERROR,
			   "Failed to initialize hostapd interface for mesh");
		return -1;
	}

	if (wpa_drv_init_mesh(wpa_s)) {
		wpa_msg(wpa_s, MSG_ERROR, "Failed to init mesh in driver");
		return -1;
	}

	if (mconf->security != MESH_CONF_SEC_NONE) {
		if (ssid->passphrase == NULL) {
			wpa_printf(MSG_ERROR,
				   "mesh: Passphrase for SAE not configured");
			goto out_free;
		}

		bss->conf->wpa = ssid->proto;
		bss->conf->wpa_key_mgmt = ssid->key_mgmt;

		if (wpa_s->conf->sae_groups &&
		    wpa_s->conf->sae_groups[0] > 0) {
			wpas_mesh_copy_groups(bss, wpa_s);
		} else {
			bss->conf->sae_groups =
				os_malloc(sizeof(default_groups));
			if (!bss->conf->sae_groups)
				goto out_free;
			os_memcpy(bss->conf->sae_groups, default_groups,
				  sizeof(default_groups));
		}

		len = os_strlen(ssid->passphrase);
		bss->conf->ssid.wpa_passphrase =
			dup_binstr(ssid->passphrase, len);

		wpa_s->mesh_rsn = mesh_rsn_auth_init(wpa_s, mconf);
		if (!wpa_s->mesh_rsn)
			goto out_free;
	}

	wpa_supplicant_conf_ap_ht(wpa_s, ssid, conf);

	return 0;
out_free:
	wpa_supplicant_mesh_deinit(wpa_s);
	return -ENOMEM;
}


void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
			  const u8 *ies, size_t ie_len)
{
	struct ieee802_11_elems elems;

	wpa_msg(wpa_s, MSG_INFO,
		"new peer notification for " MACSTR, MAC2STR(addr));

	if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
		wpa_msg(wpa_s, MSG_INFO, "Could not parse beacon from " MACSTR,
			MAC2STR(addr));
		return;
	}
	wpa_mesh_new_mesh_peer(wpa_s, addr, &elems);
}


void wpa_supplicant_mesh_add_scan_ie(struct wpa_supplicant *wpa_s,
				     struct wpabuf **extra_ie)
{
	/* EID + 0-length (wildcard) mesh-id */
	size_t ielen = 2;

	if (wpabuf_resize(extra_ie, ielen) == 0) {
		wpabuf_put_u8(*extra_ie, WLAN_EID_MESH_ID);
		wpabuf_put_u8(*extra_ie, 0);
	}
}


int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
			     struct wpa_ssid *ssid)
{
	struct wpa_driver_mesh_join_params params;
	int ret = 0;

	if (!ssid || !ssid->ssid || !ssid->ssid_len || !ssid->frequency) {
		ret = -ENOENT;
		goto out;
	}

	wpa_supplicant_mesh_deinit(wpa_s);

	os_memset(&params, 0, sizeof(params));
	params.meshid = ssid->ssid;
	params.meshid_len = ssid->ssid_len;
	ibss_mesh_setup_freq(wpa_s, ssid, &params.freq);
	wpa_s->mesh_ht_enabled = !!params.freq.ht_enabled;
	if (ssid->beacon_int > 0)
		params.beacon_int = ssid->beacon_int;
	else if (wpa_s->conf->beacon_int > 0)
		params.beacon_int = wpa_s->conf->beacon_int;
	params.max_peer_links = wpa_s->conf->max_peer_links;

	if (ssid->key_mgmt & WPA_KEY_MGMT_SAE) {
		params.flags |= WPA_DRIVER_MESH_FLAG_SAE_AUTH;
		params.flags |= WPA_DRIVER_MESH_FLAG_AMPE;
		wpa_s->conf->user_mpm = 1;
	}

	if (wpa_s->conf->user_mpm) {
		params.flags |= WPA_DRIVER_MESH_FLAG_USER_MPM;
		params.conf.flags &= ~WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS;
	} else {
		params.flags |= WPA_DRIVER_MESH_FLAG_DRIVER_MPM;
		params.conf.flags |= WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS;
	}
	params.conf.peer_link_timeout = wpa_s->conf->mesh_max_inactivity;

	if (wpa_supplicant_mesh_init(wpa_s, ssid)) {
		wpa_msg(wpa_s, MSG_ERROR, "Failed to init mesh");
		ret = -1;
		goto out;
	}

	if (wpa_s->ifmsh) {
		params.ies = wpa_s->ifmsh->mconf->ies;
		params.ie_len = wpa_s->ifmsh->mconf->ie_len;
		params.basic_rates = wpa_s->ifmsh->basic_rates;
	}

	wpa_msg(wpa_s, MSG_INFO, "joining mesh %s",
		wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
	ret = wpa_drv_join_mesh(wpa_s, &params);
	if (ret)
		wpa_msg(wpa_s, MSG_ERROR, "mesh join error=%d\n", ret);

	/* hostapd sets the interface down until we associate */
	wpa_drv_set_operstate(wpa_s, 1);

out:
	return ret;
}


int wpa_supplicant_leave_mesh(struct wpa_supplicant *wpa_s)
{
	int ret = 0;

	wpa_msg(wpa_s, MSG_INFO, "leaving mesh");

	/* Need to send peering close messages first */
	wpa_supplicant_mesh_deinit(wpa_s);

	ret = wpa_drv_leave_mesh(wpa_s);
	if (ret)
		wpa_msg(wpa_s, MSG_ERROR, "mesh leave error=%d", ret);

	wpa_drv_set_operstate(wpa_s, 1);

	return ret;
}


static int mesh_attr_text(const u8 *ies, size_t ies_len, char *buf, char *end)
{
	struct ieee802_11_elems elems;
	char *mesh_id, *pos = buf;
	u8 *bss_basic_rate_set;
	int bss_basic_rate_set_len, ret, i;

	if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) == ParseFailed)
		return -1;

	if (elems.mesh_id_len < 1)
		return 0;

	mesh_id = os_malloc(elems.mesh_id_len + 1);
	if (mesh_id == NULL)
		return -1;

	os_memcpy(mesh_id, elems.mesh_id, elems.mesh_id_len);
	mesh_id[elems.mesh_id_len] = '\0';
	ret = os_snprintf(pos, end - pos, "mesh_id=%s\n", mesh_id);
	os_free(mesh_id);
	if (os_snprintf_error(end - pos, ret))
		return pos - buf;
	pos += ret;

	if (elems.mesh_config_len > 6) {
		ret = os_snprintf(pos, end - pos,
				  "active_path_selection_protocol_id=0x%02x\n"
				  "active_path_selection_metric_id=0x%02x\n"
				  "congestion_control_mode_id=0x%02x\n"
				  "synchronization_method_id=0x%02x\n"
				  "authentication_protocol_id=0x%02x\n"
				  "mesh_formation_info=0x%02x\n"
				  "mesh_capability=0x%02x\n",
				  elems.mesh_config[0], elems.mesh_config[1],
				  elems.mesh_config[2], elems.mesh_config[3],
				  elems.mesh_config[4], elems.mesh_config[5],
				  elems.mesh_config[6]);
		if (os_snprintf_error(end - pos, ret))
			return pos - buf;
		pos += ret;
	}

	bss_basic_rate_set = os_malloc(elems.supp_rates_len +
		elems.ext_supp_rates_len);
	if (bss_basic_rate_set == NULL)
		return -1;

	bss_basic_rate_set_len = 0;
	for (i = 0; i < elems.supp_rates_len; i++) {
		if (elems.supp_rates[i] & 0x80) {
			bss_basic_rate_set[bss_basic_rate_set_len++] =
				(elems.supp_rates[i] & 0x7f) * 5;
		}
	}
	for (i = 0; i < elems.ext_supp_rates_len; i++) {
		if (elems.ext_supp_rates[i] & 0x80) {
			bss_basic_rate_set[bss_basic_rate_set_len++] =
				(elems.ext_supp_rates[i] & 0x7f) * 5;
		}
	}
	if (bss_basic_rate_set_len > 0) {
		ret = os_snprintf(pos, end - pos, "bss_basic_rate_set=%d",
				  bss_basic_rate_set[0]);
		if (os_snprintf_error(end - pos, ret))
			return pos - buf;
		pos += ret;

		for (i = 1; i < bss_basic_rate_set_len; i++) {
			ret = os_snprintf(pos, end - pos, " %d",
					  bss_basic_rate_set[i]);
			if (os_snprintf_error(end - pos, ret))
				return pos - buf;
			pos += ret;
		}

		ret = os_snprintf(pos, end - pos, "\n");
		if (os_snprintf_error(end - pos, ret))
			return pos - buf;
		pos += ret;
	}
	os_free(bss_basic_rate_set);

	return pos - buf;
}


int wpas_mesh_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
			       char *end)
{
	return mesh_attr_text(ies, ies_len, buf, end);
}


static int wpas_mesh_get_ifname(struct wpa_supplicant *wpa_s, char *ifname,
				size_t len)
{
	char *ifname_ptr = wpa_s->ifname;
	int res;

	res = os_snprintf(ifname, len, "mesh-%s-%d", ifname_ptr,
			  wpa_s->mesh_if_idx);
	if (os_snprintf_error(len, res) ||
	    (os_strlen(ifname) >= IFNAMSIZ &&
	     os_strlen(wpa_s->ifname) < IFNAMSIZ)) {
		/* Try to avoid going over the IFNAMSIZ length limit */
		res = os_snprintf(ifname, len, "mesh-%d", wpa_s->mesh_if_idx);
		if (os_snprintf_error(len, res))
			return -1;
	}
	wpa_s->mesh_if_idx++;
	return 0;
}


int wpas_mesh_add_interface(struct wpa_supplicant *wpa_s, char *ifname,
			    size_t len)
{
	struct wpa_interface iface;
	struct wpa_supplicant *mesh_wpa_s;
	u8 addr[ETH_ALEN];

	if (ifname[0] == '\0' && wpas_mesh_get_ifname(wpa_s, ifname, len) < 0)
		return -1;

	if (wpa_drv_if_add(wpa_s, WPA_IF_MESH, ifname, NULL, NULL, NULL, addr,
			   NULL) < 0) {
		wpa_printf(MSG_ERROR,
			   "mesh: Failed to create new mesh interface");
		return -1;
	}
	wpa_printf(MSG_INFO, "mesh: Created virtual interface %s addr "
		   MACSTR, ifname, MAC2STR(addr));

	os_memset(&iface, 0, sizeof(iface));
	iface.ifname = ifname;
	iface.driver = wpa_s->driver->name;
	iface.driver_param = wpa_s->conf->driver_param;
	iface.ctrl_interface = wpa_s->conf->ctrl_interface;

	mesh_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface, wpa_s);
	if (!mesh_wpa_s) {
		wpa_printf(MSG_ERROR,
			   "mesh: Failed to create new wpa_supplicant interface");
		wpa_supplicant_remove_iface(wpa_s->global, wpa_s, 0);
		return -1;
	}
	mesh_wpa_s->mesh_if_created = 1;
	return 0;
}
Commit	Line	Data
8319e312 TP	1	/*
	2	* WPA Supplicant - Basic mesh mode routines
	3	* Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
	4	*
	5	* This software may be distributed under the terms of the BSD license.
	6	* See README for more details.
	7	*/
	8
	9	#include "utils/includes.h"
	10
	11	#include "utils/common.h"
	12	#include "utils/eloop.h"
	13	#include "utils/uuid.h"
	14	#include "common/ieee802_11_defs.h"
	15	#include "common/wpa_ctrl.h"
	16	#include "ap/sta_info.h"
	17	#include "ap/hostapd.h"
	18	#include "ap/ieee802_11.h"
	19	#include "config_ssid.h"
	20	#include "config.h"
	21	#include "wpa_supplicant_i.h"
	22	#include "driver_i.h"
	23	#include "notify.h"
5cfb672d	24	#include "ap.h"
5f92659d	25	#include "mesh_mpm.h"
0f950df0	26	#include "mesh_rsn.h"
8319e312 TP	27	#include "mesh.h"
	28
	29
	30	static void wpa_supplicant_mesh_deinit(struct wpa_supplicant *wpa_s)
	31	{
	32	wpa_supplicant_mesh_iface_deinit(wpa_s, wpa_s->ifmsh);
	33	wpa_s->ifmsh = NULL;
	34	wpa_s->current_ssid = NULL;
0f950df0 TP	35	os_free(wpa_s->mesh_rsn);
0f950df0 TP	36	wpa_s->mesh_rsn = NULL;
8319e312 TP	37	/* TODO: leave mesh (stop beacon). This will happen on link down
	38	* anyway, so it's not urgent */
	39	}
	40
	41
	42	void wpa_supplicant_mesh_iface_deinit(struct wpa_supplicant *wpa_s,
	43	struct hostapd_iface *ifmsh)
	44	{
	45	if (!ifmsh)
	46	return;
	47
	48	if (ifmsh->mconf) {
5f92659d	49	mesh_mpm_deinit(wpa_s, ifmsh);
8319e312 TP	50	if (ifmsh->mconf->ies) {
	51	ifmsh->mconf->ies = NULL;
	52	/* We cannot free this struct
	53	* because wpa_authenticator on
	54	* hostapd side is also using it
	55	* for now just set to NULL and
	56	* let hostapd code free it.
	57	*/
	58	}
	59	os_free(ifmsh->mconf);
	60	ifmsh->mconf = NULL;
	61	}
	62
	63	/* take care of shared data */
	64	hostapd_interface_deinit(ifmsh);
	65	hostapd_interface_free(ifmsh);
	66	}
	67
	68
	69	static struct mesh_conf * mesh_config_create(struct wpa_ssid *ssid)
	70	{
	71	struct mesh_conf *conf;
	72
	73	conf = os_zalloc(sizeof(struct mesh_conf));
	74	if (!conf)
	75	return NULL;
	76
	77	os_memcpy(conf->meshid, ssid->ssid, ssid->ssid_len);
	78	conf->meshid_len = ssid->ssid_len;
	79
	80	if (ssid->key_mgmt & WPA_KEY_MGMT_SAE)
	81	conf->security \|= MESH_CONF_SEC_AUTH \|
	82	MESH_CONF_SEC_AMPE;
	83	else
	84	conf->security \|= MESH_CONF_SEC_NONE;
	85
	86	/* defaults */
	87	conf->mesh_pp_id = MESH_PATH_PROTOCOL_HWMP;
	88	conf->mesh_pm_id = MESH_PATH_METRIC_AIRTIME;
	89	conf->mesh_cc_id = 0;
	90	conf->mesh_sp_id = MESH_SYNC_METHOD_NEIGHBOR_OFFSET;
	91	conf->mesh_auth_id = (conf->security & MESH_CONF_SEC_AUTH) ? 1 : 0;
e6096799 MH	92	conf->dot11MeshMaxRetries = ssid->dot11MeshMaxRetries;
	93	conf->dot11MeshRetryTimeout = ssid->dot11MeshRetryTimeout;
	94	conf->dot11MeshConfirmTimeout = ssid->dot11MeshConfirmTimeout;
	95	conf->dot11MeshHoldingTimeout = ssid->dot11MeshHoldingTimeout;
8319e312 TP	96
	97	return conf;
	98	}
	99
	100
	101	static void wpas_mesh_copy_groups(struct hostapd_data *bss,
	102	struct wpa_supplicant *wpa_s)
	103	{
	104	int num_groups;
	105	size_t groups_size;
	106
	107	for (num_groups = 0; wpa_s->conf->sae_groups[num_groups] > 0;
	108	num_groups++)
	109	;
	110
	111	groups_size = (num_groups + 1) * sizeof(wpa_s->conf->sae_groups[0]);
	112	bss->conf->sae_groups = os_malloc(groups_size);
	113	if (bss->conf->sae_groups)
	114	os_memcpy(bss->conf->sae_groups, wpa_s->conf->sae_groups,
	115	groups_size);
	116	}
	117
	118
	119	static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
	120	struct wpa_ssid *ssid)
	121	{
	122	struct hostapd_iface *ifmsh;
	123	struct hostapd_data *bss;
	124	struct hostapd_config *conf;
	125	struct mesh_conf *mconf;
	126	int basic_rates_erp[] = { 10, 20, 55, 60, 110, 120, 240, -1 };
	127	static int default_groups[] = { 19, 20, 21, 25, 26, -1 };
	128	size_t len;
2b2bb5a8	129	int rate_len;
8319e312	130
5f92659d BC	131	if (!wpa_s->conf->user_mpm) {
	132	/* not much for us to do here */
	133	wpa_msg(wpa_s, MSG_WARNING,
	134	"user_mpm is not enabled in configuration");
	135	return 0;
	136	}
	137
8319e312 TP	138	wpa_s->ifmsh = ifmsh = os_zalloc(sizeof(*wpa_s->ifmsh));
	139	if (!ifmsh)
	140	return -ENOMEM;
	141
edfefaed	142	ifmsh->drv_flags = wpa_s->drv_flags;
8319e312 TP	143	ifmsh->num_bss = 1;
	144	ifmsh->bss = os_calloc(wpa_s->ifmsh->num_bss,
	145	sizeof(struct hostapd_data *));
	146	if (!ifmsh->bss)
	147	goto out_free;
	148
	149	ifmsh->bss[0] = bss = os_zalloc(sizeof(struct hostapd_data));
	150	if (!bss)
	151	goto out_free;
	152
	153	os_memcpy(bss->own_addr, wpa_s->own_addr, ETH_ALEN);
	154	bss->driver = wpa_s->driver;
	155	bss->drv_priv = wpa_s->drv_priv;
	156	bss->iface = ifmsh;
c596f3f0	157	bss->mesh_sta_free_cb = mesh_mpm_free_sta;
8319e312 TP	158	wpa_s->assoc_freq = ssid->frequency;
	159	wpa_s->current_ssid = ssid;
	160
	161	/* setup an AP config for auth processing */
	162	conf = hostapd_config_defaults();
	163	if (!conf)
	164	goto out_free;
	165
	166	bss->conf = *conf->bss;
	167	bss->conf->start_disabled = 1;
	168	bss->conf->mesh = MESH_ENABLED;
5a2a6de6	169	bss->conf->ap_max_inactivity = wpa_s->conf->mesh_max_inactivity;
8319e312 TP	170	bss->iconf = conf;
	171	ifmsh->conf = conf;
	172
4b409368	173	ifmsh->bss[0]->max_plinks = wpa_s->conf->max_peer_links;
8319e312 TP	174	os_strlcpy(bss->conf->iface, wpa_s->ifname, sizeof(bss->conf->iface));
	175
	176	mconf = mesh_config_create(ssid);
	177	if (!mconf)
	178	goto out_free;
	179	ifmsh->mconf = mconf;
	180
	181	/* need conf->hw_mode for supported rates. */
	182	if (ssid->frequency == 0) {
	183	conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
	184	conf->channel = 1;
	185	} else {
	186	conf->hw_mode = ieee80211_freq_to_chan(ssid->frequency,
	187	&conf->channel);
	188	}
	189	if (conf->hw_mode == NUM_HOSTAPD_MODES) {
	190	wpa_printf(MSG_ERROR, "Unsupported mesh mode frequency: %d MHz",
	191	ssid->frequency);
	192	goto out_free;
	193	}
	194
2b2bb5a8 MH	195	if (ssid->mesh_basic_rates == NULL) {
	196	/*
	197	* XXX: Hack! This is so an MPM which correctly sets the ERP
	198	* mandatory rates as BSSBasicRateSet doesn't reject us. We
	199	* could add a new hw_mode HOSTAPD_MODE_IEEE80211G_ERP, but
	200	* this is way easier. This also makes our BSSBasicRateSet
	201	* advertised in beacons match the one in peering frames, sigh.
	202	*/
	203	if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
	204	conf->basic_rates = os_malloc(sizeof(basic_rates_erp));
	205	if (!conf->basic_rates)
	206	goto out_free;
	207	os_memcpy(conf->basic_rates, basic_rates_erp,
	208	sizeof(basic_rates_erp));
	209	}
	210	} else {
	211	rate_len = 0;
	212	while (1) {
	213	if (ssid->mesh_basic_rates[rate_len] < 1)
	214	break;
	215	rate_len++;
	216	}
	217	conf->basic_rates = os_calloc(rate_len + 1, sizeof(int));
	218	if (conf->basic_rates == NULL)
8319e312	219	goto out_free;
2b2bb5a8 MH	220	os_memcpy(conf->basic_rates, ssid->mesh_basic_rates,
	221	rate_len * sizeof(int));
	222	conf->basic_rates[rate_len] = -1;
8319e312 TP	223	}
	224
	225	if (hostapd_setup_interface(ifmsh)) {
	226	wpa_printf(MSG_ERROR,
	227	"Failed to initialize hostapd interface for mesh");
	228	return -1;
	229	}
	230
	231	if (wpa_drv_init_mesh(wpa_s)) {
	232	wpa_msg(wpa_s, MSG_ERROR, "Failed to init mesh in driver");
	233	return -1;
	234	}
	235
	236	if (mconf->security != MESH_CONF_SEC_NONE) {
	237	if (ssid->passphrase == NULL) {
	238	wpa_printf(MSG_ERROR,
	239	"mesh: Passphrase for SAE not configured");
	240	goto out_free;
	241	}
	242
	243	bss->conf->wpa = ssid->proto;
	244	bss->conf->wpa_key_mgmt = ssid->key_mgmt;
	245
	246	if (wpa_s->conf->sae_groups &&
	247	wpa_s->conf->sae_groups[0] > 0) {
	248	wpas_mesh_copy_groups(bss, wpa_s);
	249	} else {
	250	bss->conf->sae_groups =
	251	os_malloc(sizeof(default_groups));
	252	if (!bss->conf->sae_groups)
	253	goto out_free;
	254	os_memcpy(bss->conf->sae_groups, default_groups,
	255	sizeof(default_groups));
	256	}
	257
	258	len = os_strlen(ssid->passphrase);
	259	bss->conf->ssid.wpa_passphrase =
	260	dup_binstr(ssid->passphrase, len);
0f950df0 TP	261
	262	wpa_s->mesh_rsn = mesh_rsn_auth_init(wpa_s, mconf);
	263	if (!wpa_s->mesh_rsn)
	264	goto out_free;
8319e312 TP	265	}
8319e312 TP	266
5cfb672d JM	267	wpa_supplicant_conf_ap_ht(wpa_s, ssid, conf);
5cfb672d JM	268
8319e312 TP	269	return 0;
	270	out_free:
	271	wpa_supplicant_mesh_deinit(wpa_s);
	272	return -ENOMEM;
	273	}
	274
	275
	276	void wpa_mesh_notify_peer(struct wpa_supplicant wpa_s, const u8 addr,
	277	const u8 *ies, size_t ie_len)
	278	{
	279	struct ieee802_11_elems elems;
	280
	281	wpa_msg(wpa_s, MSG_INFO,
	282	"new peer notification for " MACSTR, MAC2STR(addr));
	283
	284	if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
	285	wpa_msg(wpa_s, MSG_INFO, "Could not parse beacon from " MACSTR,
	286	MAC2STR(addr));
5f92659d	287	return;
8319e312	288	}
5f92659d	289	wpa_mesh_new_mesh_peer(wpa_s, addr, &elems);
8319e312 TP	290	}
	291
	292
fbca4c89 JA	293	void wpa_supplicant_mesh_add_scan_ie(struct wpa_supplicant *wpa_s,
	294	struct wpabuf **extra_ie)
	295	{
	296	/* EID + 0-length (wildcard) mesh-id */
	297	size_t ielen = 2;
	298
	299	if (wpabuf_resize(extra_ie, ielen) == 0) {
	300	wpabuf_put_u8(*extra_ie, WLAN_EID_MESH_ID);
	301	wpabuf_put_u8(*extra_ie, 0);
	302	}
	303	}
	304
	305
8319e312 TP	306	int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
	307	struct wpa_ssid *ssid)
	308	{
	309	struct wpa_driver_mesh_join_params params;
	310	int ret = 0;
	311
	312	if (!ssid \|\| !ssid->ssid \|\| !ssid->ssid_len \|\| !ssid->frequency) {
	313	ret = -ENOENT;
	314	goto out;
	315	}
	316
	317	wpa_supplicant_mesh_deinit(wpa_s);
	318
	319	os_memset(&params, 0, sizeof(params));
	320	params.meshid = ssid->ssid;
	321	params.meshid_len = ssid->ssid_len;
54fe48b9 JM	322	ibss_mesh_setup_freq(wpa_s, ssid, &params.freq);
54fe48b9 JM	323	wpa_s->mesh_ht_enabled = !!params.freq.ht_enabled;
9c58c5f7 MH	324	if (ssid->beacon_int > 0)
	325	params.beacon_int = ssid->beacon_int;
	326	else if (wpa_s->conf->beacon_int > 0)
	327	params.beacon_int = wpa_s->conf->beacon_int;
4b409368	328	params.max_peer_links = wpa_s->conf->max_peer_links;
8319e312 TP	329
	330	if (ssid->key_mgmt & WPA_KEY_MGMT_SAE) {
	331	params.flags \|= WPA_DRIVER_MESH_FLAG_SAE_AUTH;
	332	params.flags \|= WPA_DRIVER_MESH_FLAG_AMPE;
5f92659d	333	wpa_s->conf->user_mpm = 1;
8319e312 TP	334	}
8319e312 TP	335
5f92659d BC	336	if (wpa_s->conf->user_mpm) {
	337	params.flags \|= WPA_DRIVER_MESH_FLAG_USER_MPM;
	338	params.conf.flags &= ~WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS;
	339	} else {
	340	params.flags \|= WPA_DRIVER_MESH_FLAG_DRIVER_MPM;
	341	params.conf.flags \|= WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS;
	342	}
5a2a6de6	343	params.conf.peer_link_timeout = wpa_s->conf->mesh_max_inactivity;
8319e312 TP	344
	345	if (wpa_supplicant_mesh_init(wpa_s, ssid)) {
	346	wpa_msg(wpa_s, MSG_ERROR, "Failed to init mesh");
	347	ret = -1;
	348	goto out;
	349	}
	350
	351	if (wpa_s->ifmsh) {
	352	params.ies = wpa_s->ifmsh->mconf->ies;
	353	params.ie_len = wpa_s->ifmsh->mconf->ie_len;
	354	params.basic_rates = wpa_s->ifmsh->basic_rates;
	355	}
	356
	357	wpa_msg(wpa_s, MSG_INFO, "joining mesh %s",
	358	wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
	359	ret = wpa_drv_join_mesh(wpa_s, &params);
	360	if (ret)
	361	wpa_msg(wpa_s, MSG_ERROR, "mesh join error=%d\n", ret);
	362
	363	/* hostapd sets the interface down until we associate */
	364	wpa_drv_set_operstate(wpa_s, 1);
	365
	366	out:
	367	return ret;
	368	}
	369
	370
	371	int wpa_supplicant_leave_mesh(struct wpa_supplicant *wpa_s)
	372	{
	373	int ret = 0;
	374
	375	wpa_msg(wpa_s, MSG_INFO, "leaving mesh");
	376
4e0990dc JM	377	/* Need to send peering close messages first */
	378	wpa_supplicant_mesh_deinit(wpa_s);
	379
8319e312 TP	380	ret = wpa_drv_leave_mesh(wpa_s);
	381	if (ret)
	382	wpa_msg(wpa_s, MSG_ERROR, "mesh leave error=%d", ret);
	383
	384	wpa_drv_set_operstate(wpa_s, 1);
	385
8319e312 TP	386	return ret;
8319e312 TP	387	}
79070906 MH	388
	389
	390	static int mesh_attr_text(const u8 ies, size_t ies_len, char buf, char *end)
	391	{
	392	struct ieee802_11_elems elems;
	393	char mesh_id, pos = buf;
	394	u8 *bss_basic_rate_set;
	395	int bss_basic_rate_set_len, ret, i;
	396
	397	if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) == ParseFailed)
	398	return -1;
	399
	400	if (elems.mesh_id_len < 1)
	401	return 0;
	402
	403	mesh_id = os_malloc(elems.mesh_id_len + 1);
	404	if (mesh_id == NULL)
	405	return -1;
	406
	407	os_memcpy(mesh_id, elems.mesh_id, elems.mesh_id_len);
	408	mesh_id[elems.mesh_id_len] = '\0';
	409	ret = os_snprintf(pos, end - pos, "mesh_id=%s\n", mesh_id);
	410	os_free(mesh_id);
d85e1fc8	411	if (os_snprintf_error(end - pos, ret))
79070906 MH	412	return pos - buf;
	413	pos += ret;
	414
	415	if (elems.mesh_config_len > 6) {
	416	ret = os_snprintf(pos, end - pos,
	417	"active_path_selection_protocol_id=0x%02x\n"
	418	"active_path_selection_metric_id=0x%02x\n"
	419	"congestion_control_mode_id=0x%02x\n"
	420	"synchronization_method_id=0x%02x\n"
	421	"authentication_protocol_id=0x%02x\n"
	422	"mesh_formation_info=0x%02x\n"
	423	"mesh_capability=0x%02x\n",
	424	elems.mesh_config[0], elems.mesh_config[1],
	425	elems.mesh_config[2], elems.mesh_config[3],
	426	elems.mesh_config[4], elems.mesh_config[5],
	427	elems.mesh_config[6]);
d85e1fc8	428	if (os_snprintf_error(end - pos, ret))
79070906 MH	429	return pos - buf;
	430	pos += ret;
	431	}
	432
	433	bss_basic_rate_set = os_malloc(elems.supp_rates_len +
	434	elems.ext_supp_rates_len);
	435	if (bss_basic_rate_set == NULL)
	436	return -1;
	437
	438	bss_basic_rate_set_len = 0;
	439	for (i = 0; i < elems.supp_rates_len; i++) {
	440	if (elems.supp_rates[i] & 0x80) {
	441	bss_basic_rate_set[bss_basic_rate_set_len++] =
	442	(elems.supp_rates[i] & 0x7f) * 5;
	443	}
	444	}
	445	for (i = 0; i < elems.ext_supp_rates_len; i++) {
	446	if (elems.ext_supp_rates[i] & 0x80) {
	447	bss_basic_rate_set[bss_basic_rate_set_len++] =
	448	(elems.ext_supp_rates[i] & 0x7f) * 5;
	449	}
	450	}
	451	if (bss_basic_rate_set_len > 0) {
	452	ret = os_snprintf(pos, end - pos, "bss_basic_rate_set=%d",
	453	bss_basic_rate_set[0]);
d85e1fc8	454	if (os_snprintf_error(end - pos, ret))
79070906 MH	455	return pos - buf;
	456	pos += ret;
	457
	458	for (i = 1; i < bss_basic_rate_set_len; i++) {
	459	ret = os_snprintf(pos, end - pos, " %d",
	460	bss_basic_rate_set[i]);
d85e1fc8	461	if (os_snprintf_error(end - pos, ret))
79070906 MH	462	return pos - buf;
	463	pos += ret;
	464	}
	465
	466	ret = os_snprintf(pos, end - pos, "\n");
d85e1fc8	467	if (os_snprintf_error(end - pos, ret))
79070906 MH	468	return pos - buf;
	469	pos += ret;
	470	}
	471	os_free(bss_basic_rate_set);
	472
	473	return pos - buf;
	474	}
	475
	476
	477	int wpas_mesh_scan_result_text(const u8 ies, size_t ies_len, char buf,
	478	char *end)
	479	{
	480	return mesh_attr_text(ies, ies_len, buf, end);
	481	}
5b78493f MH	482
	483
	484	static int wpas_mesh_get_ifname(struct wpa_supplicant wpa_s, char ifname,
	485	size_t len)
	486	{
	487	char *ifname_ptr = wpa_s->ifname;
	488	int res;
	489
	490	res = os_snprintf(ifname, len, "mesh-%s-%d", ifname_ptr,
	491	wpa_s->mesh_if_idx);
	492	if (os_snprintf_error(len, res) \|\|
	493	(os_strlen(ifname) >= IFNAMSIZ &&
	494	os_strlen(wpa_s->ifname) < IFNAMSIZ)) {
	495	/* Try to avoid going over the IFNAMSIZ length limit */
	496	res = os_snprintf(ifname, len, "mesh-%d", wpa_s->mesh_if_idx);
	497	if (os_snprintf_error(len, res))
	498	return -1;
	499	}
	500	wpa_s->mesh_if_idx++;
	501	return 0;
	502	}
	503
	504
	505	int wpas_mesh_add_interface(struct wpa_supplicant wpa_s, char ifname,
	506	size_t len)
	507	{
	508	struct wpa_interface iface;
	509	struct wpa_supplicant *mesh_wpa_s;
	510	u8 addr[ETH_ALEN];
	511
	512	if (ifname[0] == '\0' && wpas_mesh_get_ifname(wpa_s, ifname, len) < 0)
	513	return -1;
	514
	515	if (wpa_drv_if_add(wpa_s, WPA_IF_MESH, ifname, NULL, NULL, NULL, addr,
	516	NULL) < 0) {
	517	wpa_printf(MSG_ERROR,
	518	"mesh: Failed to create new mesh interface");
	519	return -1;
	520	}
	521	wpa_printf(MSG_INFO, "mesh: Created virtual interface %s addr "
	522	MACSTR, ifname, MAC2STR(addr));
	523
	524	os_memset(&iface, 0, sizeof(iface));
	525	iface.ifname = ifname;
	526	iface.driver = wpa_s->driver->name;
	527	iface.driver_param = wpa_s->conf->driver_param;
	528	iface.ctrl_interface = wpa_s->conf->ctrl_interface;
	529
1772d348	530	mesh_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface, wpa_s);
5b78493f MH	531	if (!mesh_wpa_s) {
	532	wpa_printf(MSG_ERROR,
	533	"mesh: Failed to create new wpa_supplicant interface");
	534	wpa_supplicant_remove_iface(wpa_s->global, wpa_s, 0);
	535	return -1;
	536	}
	537	mesh_wpa_s->mesh_if_created = 1;
5b78493f MH	538	return 0;
5b78493f MH	539	}