[deliverable/linux.git] / net / wireless / mesh.c

#include <linux/ieee80211.h>
#include <net/cfg80211.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

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

/*
 * 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,
	.dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
	.dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
	.path_refresh_time = MESH_PATH_REFRESH_TIME,
	.min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
};

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;
}

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