1 #include <linux/ieee80211.h> 2 #include <linux/export.h> 3 #include <net/cfg80211.h> 4 #include "nl80211.h" 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 16 #define MESH_RANN_INTERVAL 5000 17 18 /* 19 * Minimum interval between two consecutive PREQs originated by the same 20 * interface 21 */ 22 #define MESH_PREQ_MIN_INT 10 23 #define MESH_PERR_MIN_INT 100 24 #define MESH_DIAM_TRAVERSAL_TIME 50 25 26 #define MESH_RSSI_THRESHOLD 0 27 28 /* 29 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds 30 * before timing out. This way it will remain ACTIVE and no data frames 31 * will be unnecessarily held in the pending queue. 32 */ 33 #define MESH_PATH_REFRESH_TIME 1000 34 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME) 35 36 /* Default maximum number of established plinks per interface */ 37 #define MESH_MAX_ESTAB_PLINKS 32 38 39 #define MESH_MAX_PREQ_RETRIES 4 40 41 #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50 42 43 const struct mesh_config default_mesh_config = { 44 .dot11MeshRetryTimeout = MESH_RET_T, 45 .dot11MeshConfirmTimeout = MESH_CONF_T, 46 .dot11MeshHoldingTimeout = MESH_HOLD_T, 47 .dot11MeshMaxRetries = MESH_MAX_RETR, 48 .dot11MeshTTL = MESH_TTL, 49 .element_ttl = MESH_DEFAULT_ELEMENT_TTL, 50 .auto_open_plinks = true, 51 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS, 52 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX, 53 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT, 54 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT, 55 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT, 56 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME, 57 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES, 58 .path_refresh_time = MESH_PATH_REFRESH_TIME, 59 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT, 60 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL, 61 .dot11MeshGateAnnouncementProtocol = false, 62 .dot11MeshForwarding = true, 63 .rssi_threshold = MESH_RSSI_THRESHOLD, 64 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED, 65 }; 66 67 const struct mesh_setup default_mesh_setup = { 68 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET, 69 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, 70 .path_metric = IEEE80211_PATH_METRIC_AIRTIME, 71 .ie = NULL, 72 .ie_len = 0, 73 .is_secure = false, 74 }; 75 76 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 77 struct net_device *dev, 78 const struct mesh_setup *setup, 79 const struct mesh_config *conf) 80 { 81 struct wireless_dev *wdev = dev->ieee80211_ptr; 82 int err; 83 84 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); 85 86 ASSERT_WDEV_LOCK(wdev); 87 88 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 89 return -EOPNOTSUPP; 90 91 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && 92 setup->is_secure) 93 return -EOPNOTSUPP; 94 95 if (wdev->mesh_id_len) 96 return -EALREADY; 97 98 if (!setup->mesh_id_len) 99 return -EINVAL; 100 101 if (!rdev->ops->join_mesh) 102 return -EOPNOTSUPP; 103 104 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup); 105 if (!err) { 106 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); 107 wdev->mesh_id_len = setup->mesh_id_len; 108 } 109 110 return err; 111 } 112 113 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 114 struct net_device *dev, 115 const struct mesh_setup *setup, 116 const struct mesh_config *conf) 117 { 118 struct wireless_dev *wdev = dev->ieee80211_ptr; 119 int err; 120 121 wdev_lock(wdev); 122 err = __cfg80211_join_mesh(rdev, dev, setup, conf); 123 wdev_unlock(wdev); 124 125 return err; 126 } 127 128 void cfg80211_notify_new_peer_candidate(struct net_device *dev, 129 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp) 130 { 131 struct wireless_dev *wdev = dev->ieee80211_ptr; 132 133 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT)) 134 return; 135 136 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev, 137 macaddr, ie, ie_len, gfp); 138 } 139 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate); 140 141 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 142 struct net_device *dev) 143 { 144 struct wireless_dev *wdev = dev->ieee80211_ptr; 145 int err; 146 147 ASSERT_WDEV_LOCK(wdev); 148 149 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 150 return -EOPNOTSUPP; 151 152 if (!rdev->ops->leave_mesh) 153 return -EOPNOTSUPP; 154 155 if (!wdev->mesh_id_len) 156 return -ENOTCONN; 157 158 err = rdev->ops->leave_mesh(&rdev->wiphy, dev); 159 if (!err) 160 wdev->mesh_id_len = 0; 161 return err; 162 } 163 164 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 165 struct net_device *dev) 166 { 167 struct wireless_dev *wdev = dev->ieee80211_ptr; 168 int err; 169 170 wdev_lock(wdev); 171 err = __cfg80211_leave_mesh(rdev, dev); 172 wdev_unlock(wdev); 173 174 return err; 175 } 176