[mirror_ubuntu-artful-kernel.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,
};

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 (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,
c80d545d	58	};
29cbe68c JB	59
	60	int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
	61	struct net_device *dev,
c80d545d	62	const struct mesh_setup *setup,
29cbe68c JB	63	const struct mesh_config *conf)
	64	{
	65	struct wireless_dev *wdev = dev->ieee80211_ptr;
29cbe68c JB	66	int err;
	67
	68	BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
	69
	70	ASSERT_WDEV_LOCK(wdev);
	71
	72	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
	73	return -EOPNOTSUPP;
	74
	75	if (wdev->mesh_id_len)
	76	return -EALREADY;
	77
c80d545d	78	if (!setup->mesh_id_len)
29cbe68c JB	79	return -EINVAL;
	80
	81	if (!rdev->ops->join_mesh)
	82	return -EOPNOTSUPP;
	83
c80d545d	84	err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
29cbe68c	85	if (!err) {
c80d545d JC	86	memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
c80d545d JC	87	wdev->mesh_id_len = setup->mesh_id_len;
29cbe68c JB	88	}
	89
	90	return err;
	91	}
	92
	93	int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
	94	struct net_device *dev,
c80d545d	95	const struct mesh_setup *setup,
29cbe68c JB	96	const struct mesh_config *conf)
	97	{
	98	struct wireless_dev *wdev = dev->ieee80211_ptr;
	99	int err;
	100
	101	wdev_lock(wdev);
c80d545d	102	err = __cfg80211_join_mesh(rdev, dev, setup, conf);
29cbe68c JB	103	wdev_unlock(wdev);
	104
	105	return err;
	106	}
	107
	108	static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
	109	struct net_device *dev)
	110	{
	111	struct wireless_dev *wdev = dev->ieee80211_ptr;
	112	int err;
	113
	114	ASSERT_WDEV_LOCK(wdev);
	115
	116	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
	117	return -EOPNOTSUPP;
	118
	119	if (!rdev->ops->leave_mesh)
	120	return -EOPNOTSUPP;
	121
	122	if (!wdev->mesh_id_len)
	123	return -ENOTCONN;
	124
	125	err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
	126	if (!err)
	127	wdev->mesh_id_len = 0;
	128	return err;
	129	}
	130
	131	int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
	132	struct net_device *dev)
	133	{
	134	struct wireless_dev *wdev = dev->ieee80211_ptr;
	135	int err;
	136
	137	wdev_lock(wdev);
	138	err = __cfg80211_leave_mesh(rdev, dev);
	139	wdev_unlock(wdev);
	140
	141	return err;
	142	}