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Release 4.11 net/wireless/mesh.c

Directory: net/wireless
#include <linux/ieee80211.h>
#include <linux/export.h>
#include <net/cfg80211.h>
#include "nl80211.h"
#include "core.h"
#include "rdev-ops.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

#define MESH_PATH_TO_ROOT_TIMEOUT      6000

#define MESH_ROOT_INTERVAL     5000

#define MESH_ROOT_CONFIRMATION_INTERVAL 2000

#define MESH_DEFAULT_PLINK_TIMEOUT	1800 
/* timeout in seconds */

/*
 * 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


#define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50


#define MESH_DEFAULT_BEACON_INTERVAL	1000	
/* in 1024 us units (=TUs) */

#define MESH_DEFAULT_DTIM_PERIOD	2

#define MESH_DEFAULT_AWAKE_WINDOW	10	
/* in 1024 us units (=TUs) */


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,
	.dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
	.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,
	.ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
	.dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
	.dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
	.dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
	.power_mode = NL80211_MESH_POWER_ACTIVE,
	.dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
	.plink_timeout = MESH_DEFAULT_PLINK_TIMEOUT,
};


const struct mesh_setup default_mesh_setup = {
	/* cfg80211_join_mesh() will pick a channel if needed */
	.sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
	.path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
	.path_metric = IEEE80211_PATH_METRIC_AIRTIME,
	.auth_id = 0, /* open */
	.ie = NULL,
	.ie_len = 0,
	.is_secure = false,
	.user_mpm = false,
	.beacon_interval = MESH_DEFAULT_BEACON_INTERVAL,
	.dtim_period = MESH_DEFAULT_DTIM_PERIOD,
};


int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, struct net_device *dev, 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; if (!setup->chandef.chan) { /* if no channel explicitly given, use preset channel */ setup->chandef = wdev->preset_chandef; } if (!setup->chandef.chan) { /* if we don't have that either, use the first usable channel */ enum nl80211_band band; for (band = 0; band < NUM_NL80211_BANDS; band++) { struct ieee80211_supported_band *sband; struct ieee80211_channel *chan; int i; sband = rdev->wiphy.bands[band]; if (!sband) continue; for (i = 0; i < sband->n_channels; i++) { chan = &sband->channels[i]; if (chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR)) continue; setup->chandef.chan = chan; break; } if (setup->chandef.chan) break; } /* no usable channel ... */ if (!setup->chandef.chan) return -EINVAL; setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT; setup->chandef.center_freq1 = setup->chandef.chan->center_freq; } /* * check if basic rates are available otherwise use mandatory rates as * basic rates */ if (!setup->basic_rates) { enum nl80211_bss_scan_width scan_width; struct ieee80211_supported_band *sband = rdev->wiphy.bands[setup->chandef.chan->band]; scan_width = cfg80211_chandef_to_scan_width(&setup->chandef); setup->basic_rates = ieee80211_mandatory_rates(sband, scan_width); } if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef, NL80211_IFTYPE_MESH_POINT)) return -EINVAL; err = rdev_join_mesh(rdev, dev, conf, setup); if (!err) { memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); wdev->mesh_id_len = setup->mesh_id_len; wdev->chandef = setup->chandef; wdev->beacon_interval = setup->beacon_interval; } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg32374.25%637.50%
Ashok Nagarajan398.97%16.25%
Javier Cardona327.36%212.50%
Simon Wunderlich163.68%16.25%
Marco Porsch143.22%16.25%
Michal Kazior71.61%212.50%
Ilan Peer20.46%16.25%
Hila Gonen10.23%16.25%
Luis R. Rodriguez10.23%16.25%
Total435100.00%16100.00%


int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, struct net_device *dev, 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; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg6093.75%150.00%
Javier Cardona46.25%150.00%
Total64100.00%2100.00%


int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, struct cfg80211_chan_def *chandef) { int err; /* * Workaround for libertas (only!), it puts the interface * into mesh mode but doesn't implement join_mesh. Instead, * it is configured via sysfs and then joins the mesh when * you set the channel. Note that the libertas mesh isn't * compatible with 802.11 mesh. */ if (rdev->ops->libertas_set_mesh_channel) { if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) return -EINVAL; if (!netif_running(wdev->netdev)) return -ENETDOWN; err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev, chandef->chan); if (!err) wdev->chandef = *chandef; return err; } if (wdev->mesh_id_len) return -EBUSY; wdev->preset_chandef = *chandef; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg9081.82%450.00%
Michal Kazior1917.27%337.50%
Hila Gonen10.91%112.50%
Total110100.00%8100.00%


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_leave_mesh(rdev, dev); if (!err) { wdev->mesh_id_len = 0; wdev->beacon_interval = 0; memset(&wdev->chandef, 0, sizeof(wdev->chandef)); rdev_set_qos_map(rdev, dev, NULL); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg9877.17%233.33%
Michal Kazior1914.96%233.33%
Kyeyoon Park97.09%116.67%
Hila Gonen10.79%116.67%
Total127100.00%6100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg49100.00%1100.00%
Total49100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg76469.02%718.92%
Javier Cardona988.85%821.62%
Ashok Nagarajan534.79%38.11%
Marco Porsch484.34%38.11%
Michal Kazior454.07%38.11%
Chun-Yeow Yeoh322.89%38.11%
Colleen Twitty161.45%25.41%
Simon Wunderlich161.45%12.70%
Thomas Pedersen141.26%25.41%
Kyeyoon Park90.81%12.70%
Hila Gonen60.54%12.70%
Paul Gortmaker30.27%12.70%
Ilan Peer20.18%12.70%
Luis R. Rodriguez10.09%12.70%
Total1107100.00%37100.00%
Directory: net/wireless
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