[mirror_ubuntu-artful-kernel.git] / net / wireless / mesh.c

#include <linux/ieee80211.h>
#include <linux/export.h>
#include <net/cfg80211.h>
#include "nl80211.h"
#include "core.h"

/* Default values, timeouts in ms */
#define MESH_TTL 		31
#define MESH_DEFAULT_ELEMENT_TTL 31
#define MESH_MAX_RETR	 	3
#define MESH_RET_T 		100
#define MESH_CONF_T 		100
#define MESH_HOLD_T 		100

#define MESH_PATH_TIMEOUT	5000
#define MESH_RANN_INTERVAL      5000

/*
 * Minimum interval between two consecutive PREQs originated by the same
 * interface
 */
#define MESH_PREQ_MIN_INT	10
#define MESH_PERR_MIN_INT	100
#define MESH_DIAM_TRAVERSAL_TIME 50

#define MESH_RSSI_THRESHOLD	0

/*
 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
 * before timing out.  This way it will remain ACTIVE and no data frames
 * will be unnecessarily held in the pending queue.
 */
#define MESH_PATH_REFRESH_TIME			1000
#define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)

/* Default maximum number of established plinks per interface */
#define MESH_MAX_ESTAB_PLINKS	32

#define MESH_MAX_PREQ_RETRIES	4


const struct mesh_config default_mesh_config = {
	.dot11MeshRetryTimeout = MESH_RET_T,
	.dot11MeshConfirmTimeout = MESH_CONF_T,
	.dot11MeshHoldingTimeout = MESH_HOLD_T,
	.dot11MeshMaxRetries = MESH_MAX_RETR,
	.dot11MeshTTL = MESH_TTL,
	.element_ttl = MESH_DEFAULT_ELEMENT_TTL,
	.auto_open_plinks = true,
	.dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
	.dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
	.dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
	.dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
	.dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
	.dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
	.path_refresh_time = MESH_PATH_REFRESH_TIME,
	.min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
	.dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
	.dot11MeshGateAnnouncementProtocol = false,
	.dot11MeshForwarding = true,
	.rssi_threshold = MESH_RSSI_THRESHOLD,
};

const struct mesh_setup default_mesh_setup = {
	.path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
	.path_metric = IEEE80211_PATH_METRIC_AIRTIME,
	.ie = NULL,
	.ie_len = 0,
	.is_secure = false,
};

int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
			 const struct mesh_setup *setup,
			 const struct mesh_config *conf)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);

	ASSERT_WDEV_LOCK(wdev);

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
		return -EOPNOTSUPP;

	if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
	      setup->is_secure)
		return -EOPNOTSUPP;

	if (wdev->mesh_id_len)
		return -EALREADY;

	if (!setup->mesh_id_len)
		return -EINVAL;

	if (!rdev->ops->join_mesh)
		return -EOPNOTSUPP;

	err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
	if (!err) {
		memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
		wdev->mesh_id_len = setup->mesh_id_len;
	}

	return err;
}

int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
		       const struct mesh_setup *setup,
		       const struct mesh_config *conf)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_join_mesh(rdev, dev, setup, conf);
	wdev_unlock(wdev);

	return err;
}

void cfg80211_notify_new_peer_candidate(struct net_device *dev,
		const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
		return;

	nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
			macaddr, ie, ie_len, gfp);
}
EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);

static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
				 struct net_device *dev)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	ASSERT_WDEV_LOCK(wdev);

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
		return -EOPNOTSUPP;

	if (!rdev->ops->leave_mesh)
		return -EOPNOTSUPP;

	if (!wdev->mesh_id_len)
		return -ENOTCONN;

	err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
	if (!err)
		wdev->mesh_id_len = 0;
	return err;
}

int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
			struct net_device *dev)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_leave_mesh(rdev, dev);
	wdev_unlock(wdev);

	return err;
}
Commit	Line	Data
29cbe68c	1	#include <linux/ieee80211.h>
bc3b2d7f	2	#include <linux/export.h>
29cbe68c	3	#include <net/cfg80211.h>
c93b5e71	4	#include "nl80211.h"
29cbe68c JB	5	#include "core.h"
	6
	7	/* Default values, timeouts in ms */
	8	#define MESH_TTL 31
	9	#define MESH_DEFAULT_ELEMENT_TTL 31
	10	#define MESH_MAX_RETR 3
	11	#define MESH_RET_T 100
	12	#define MESH_CONF_T 100
	13	#define MESH_HOLD_T 100
	14
	15	#define MESH_PATH_TIMEOUT 5000
0507e159	16	#define MESH_RANN_INTERVAL 5000
29cbe68c JB	17
	18	/*
	19	* Minimum interval between two consecutive PREQs originated by the same
	20	* interface
	21	*/
	22	#define MESH_PREQ_MIN_INT 10
dca7e943	23	#define MESH_PERR_MIN_INT 100
29cbe68c JB	24	#define MESH_DIAM_TRAVERSAL_TIME 50
29cbe68c JB	25
55335137 AN	26	#define MESH_RSSI_THRESHOLD 0
55335137 AN	27
29cbe68c JB	28	/*
	29	* A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
	30	* before timing out. This way it will remain ACTIVE and no data frames
	31	* will be unnecessarily held in the pending queue.
	32	*/
	33	#define MESH_PATH_REFRESH_TIME 1000
	34	#define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
	35
	36	/* Default maximum number of established plinks per interface */
	37	#define MESH_MAX_ESTAB_PLINKS 32
	38
	39	#define MESH_MAX_PREQ_RETRIES 4
	40
	41
	42	const struct mesh_config default_mesh_config = {
	43	.dot11MeshRetryTimeout = MESH_RET_T,
	44	.dot11MeshConfirmTimeout = MESH_CONF_T,
	45	.dot11MeshHoldingTimeout = MESH_HOLD_T,
	46	.dot11MeshMaxRetries = MESH_MAX_RETR,
	47	.dot11MeshTTL = MESH_TTL,
	48	.element_ttl = MESH_DEFAULT_ELEMENT_TTL,
	49	.auto_open_plinks = true,
	50	.dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
	51	.dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
	52	.dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
dca7e943	53	.dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
29cbe68c JB	54	.dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
	55	.dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
	56	.path_refresh_time = MESH_PATH_REFRESH_TIME,
	57	.min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
0507e159	58	.dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
16dd7267	59	.dot11MeshGateAnnouncementProtocol = false,
94f90656	60	.dot11MeshForwarding = true,
55335137	61	.rssi_threshold = MESH_RSSI_THRESHOLD,
29cbe68c JB	62	};
29cbe68c JB	63
c80d545d JC	64	const struct mesh_setup default_mesh_setup = {
	65	.path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
	66	.path_metric = IEEE80211_PATH_METRIC_AIRTIME,
581a8b0f JC	67	.ie = NULL,
581a8b0f JC	68	.ie_len = 0,
5cff5e01	69	.is_secure = false,
c80d545d	70	};
29cbe68c JB	71
	72	int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
	73	struct net_device *dev,
c80d545d	74	const struct mesh_setup *setup,
29cbe68c JB	75	const struct mesh_config *conf)
	76	{
	77	struct wireless_dev *wdev = dev->ieee80211_ptr;
29cbe68c JB	78	int err;
	79
	80	BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
	81
	82	ASSERT_WDEV_LOCK(wdev);
	83
	84	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
	85	return -EOPNOTSUPP;
	86
15d5dda6 JC	87	if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
	88	setup->is_secure)
	89	return -EOPNOTSUPP;
	90
29cbe68c JB	91	if (wdev->mesh_id_len)
	92	return -EALREADY;
	93
c80d545d	94	if (!setup->mesh_id_len)
29cbe68c JB	95	return -EINVAL;
	96
	97	if (!rdev->ops->join_mesh)
	98	return -EOPNOTSUPP;
	99
c80d545d	100	err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
29cbe68c	101	if (!err) {
c80d545d JC	102	memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
c80d545d JC	103	wdev->mesh_id_len = setup->mesh_id_len;
29cbe68c JB	104	}
	105
	106	return err;
	107	}
	108
	109	int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
	110	struct net_device *dev,
c80d545d	111	const struct mesh_setup *setup,
29cbe68c JB	112	const struct mesh_config *conf)
	113	{
	114	struct wireless_dev *wdev = dev->ieee80211_ptr;
	115	int err;
	116
	117	wdev_lock(wdev);
c80d545d	118	err = __cfg80211_join_mesh(rdev, dev, setup, conf);
29cbe68c JB	119	wdev_unlock(wdev);
	120
	121	return err;
	122	}
	123
c93b5e71 JC	124	void cfg80211_notify_new_peer_candidate(struct net_device *dev,
	125	const u8 macaddr, const u8 ie, u8 ie_len, gfp_t gfp)
	126	{
	127	struct wireless_dev *wdev = dev->ieee80211_ptr;
	128
	129	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
	130	return;
	131
	132	nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
	133	macaddr, ie, ie_len, gfp);
	134	}
	135	EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
	136
29cbe68c JB	137	static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
	138	struct net_device *dev)
	139	{
	140	struct wireless_dev *wdev = dev->ieee80211_ptr;
	141	int err;
	142
	143	ASSERT_WDEV_LOCK(wdev);
	144
	145	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
	146	return -EOPNOTSUPP;
	147
	148	if (!rdev->ops->leave_mesh)
	149	return -EOPNOTSUPP;
	150
	151	if (!wdev->mesh_id_len)
	152	return -ENOTCONN;
	153
	154	err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
	155	if (!err)
	156	wdev->mesh_id_len = 0;
	157	return err;
	158	}
	159
	160	int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
	161	struct net_device *dev)
	162	{
	163	struct wireless_dev *wdev = dev->ieee80211_ptr;
	164	int err;
	165
	166	wdev_lock(wdev);
	167	err = __cfg80211_leave_mesh(rdev, dev);
	168	wdev_unlock(wdev);
	169
	170	return err;
	171	}