[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / wireless / mesh.c

#include <linux/ieee80211.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_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,
	.dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
	.dot11MeshGateAnnouncementProtocol = false,
};

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