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