166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
#include <linux/ieee80211.h>
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#include <linux/export.h>
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#include <net/cfg80211.h>
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#include "nl80211.h"
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#include "core.h"
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/* Default values, timeouts in ms */
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#define MESH_TTL 31
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#define MESH_DEFAULT_ELEMENT_TTL 31
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#define MESH_MAX_RETR 3
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#define MESH_RET_T 100
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#define MESH_CONF_T 100
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#define MESH_HOLD_T 100
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#define MESH_PATH_TIMEOUT 5000
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#define MESH_RANN_INTERVAL 5000
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/*
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* Minimum interval between two consecutive PREQs originated by the same
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* interface
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*/
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#define MESH_PREQ_MIN_INT 10
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#define MESH_DIAM_TRAVERSAL_TIME 50
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/*
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* A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
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* before timing out. This way it will remain ACTIVE and no data frames
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* will be unnecessarily held in the pending queue.
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*/
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#define MESH_PATH_REFRESH_TIME 1000
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#define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
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/* Default maximum number of established plinks per interface */
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#define MESH_MAX_ESTAB_PLINKS 32
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#define MESH_MAX_PREQ_RETRIES 4
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const struct mesh_config default_mesh_config = {
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.dot11MeshRetryTimeout = MESH_RET_T,
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.dot11MeshConfirmTimeout = MESH_CONF_T,
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.dot11MeshHoldingTimeout = MESH_HOLD_T,
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.dot11MeshMaxRetries = MESH_MAX_RETR,
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.dot11MeshTTL = MESH_TTL,
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.element_ttl = MESH_DEFAULT_ELEMENT_TTL,
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.auto_open_plinks = true,
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.dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
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.dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
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.dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
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.dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
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.dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
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.path_refresh_time = MESH_PATH_REFRESH_TIME,
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.min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
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.dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
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.dot11MeshGateAnnouncementProtocol = false,
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};
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const struct mesh_setup default_mesh_setup = {
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.path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
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.path_metric = IEEE80211_PATH_METRIC_AIRTIME,
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.ie = NULL,
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.ie_len = 0,
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.is_secure = false,
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};
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int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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const struct mesh_setup *setup,
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const struct mesh_config *conf)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int err;
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BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
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ASSERT_WDEV_LOCK(wdev);
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if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
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return -EOPNOTSUPP;
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if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
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setup->is_secure)
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return -EOPNOTSUPP;
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if (wdev->mesh_id_len)
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return -EALREADY;
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if (!setup->mesh_id_len)
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return -EINVAL;
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if (!rdev->ops->join_mesh)
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return -EOPNOTSUPP;
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err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
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if (!err) {
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memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
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wdev->mesh_id_len = setup->mesh_id_len;
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}
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return err;
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}
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int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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const struct mesh_setup *setup,
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const struct mesh_config *conf)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int err;
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wdev_lock(wdev);
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err = __cfg80211_join_mesh(rdev, dev, setup, conf);
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wdev_unlock(wdev);
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return err;
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}
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void cfg80211_notify_new_peer_candidate(struct net_device *dev,
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const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
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return;
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nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
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macaddr, ie, ie_len, gfp);
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}
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EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
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static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int err;
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ASSERT_WDEV_LOCK(wdev);
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if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
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return -EOPNOTSUPP;
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if (!rdev->ops->leave_mesh)
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return -EOPNOTSUPP;
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if (!wdev->mesh_id_len)
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return -ENOTCONN;
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err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
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if (!err)
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wdev->mesh_id_len = 0;
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return err;
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}
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int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
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struct net_device *dev)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int err;
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wdev_lock(wdev);
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err = __cfg80211_leave_mesh(rdev, dev);
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wdev_unlock(wdev);
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return err;
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}
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