5533513784
Mesh peer links are established only if average rssi of the peer candidate satisfies the threshold. This is not in 802.11s specification but was requested by David Fulgham, an open80211s user. This is a way to avoid marginal peer links with stations that are barely within range. This patch adds a new mesh configuration parameter, mesh_rssi_threshold. This feature is supported only for hardwares that report signal in dBm. Signed-off-by: Ashok Nagarajan <ashok@cozybit.com> Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
172 lines
4.4 KiB
C
172 lines
4.4 KiB
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
|
|
|
|
#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
|
|
|
|
|
|
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,
|
|
.dot11MeshForwarding = true,
|
|
.rssi_threshold = MESH_RSSI_THRESHOLD,
|
|
};
|
|
|
|
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;
|
|
}
|