[deliverable/linux.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

/*
 * 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,
};

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