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 42 const struct mesh_config default_mesh_config = { 43 .dot11MeshRetryTimeout = MESH_RET_T, 44 .dot11MeshConfirmTimeout = MESH_CONF_T, 45 .dot11MeshHoldingTimeout = MESH_HOLD_T, 46 .dot11MeshMaxRetries = MESH_MAX_RETR, 47 .dot11MeshTTL = MESH_TTL, 48 .element_ttl = MESH_DEFAULT_ELEMENT_TTL, 49 .auto_open_plinks = true, 50 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS, 51 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT, 52 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT, 53 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT, 54 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME, 55 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES, 56 .path_refresh_time = MESH_PATH_REFRESH_TIME, 57 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT, 58 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL, 59 .dot11MeshGateAnnouncementProtocol = false, 60 .dot11MeshForwarding = true, 61 .rssi_threshold = MESH_RSSI_THRESHOLD, 62 }; 63 64 const struct mesh_setup default_mesh_setup = { 65 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, 66 .path_metric = IEEE80211_PATH_METRIC_AIRTIME, 67 .ie = NULL, 68 .ie_len = 0, 69 .is_secure = false, 70 }; 71 72 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 73 struct net_device *dev, 74 const struct mesh_setup *setup, 75 const struct mesh_config *conf) 76 { 77 struct wireless_dev *wdev = dev->ieee80211_ptr; 78 int err; 79 80 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); 81 82 ASSERT_WDEV_LOCK(wdev); 83 84 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 85 return -EOPNOTSUPP; 86 87 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && 88 setup->is_secure) 89 return -EOPNOTSUPP; 90 91 if (wdev->mesh_id_len) 92 return -EALREADY; 93 94 if (!setup->mesh_id_len) 95 return -EINVAL; 96 97 if (!rdev->ops->join_mesh) 98 return -EOPNOTSUPP; 99 100 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup); 101 if (!err) { 102 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); 103 wdev->mesh_id_len = setup->mesh_id_len; 104 } 105 106 return err; 107 } 108 109 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 110 struct net_device *dev, 111 const struct mesh_setup *setup, 112 const struct mesh_config *conf) 113 { 114 struct wireless_dev *wdev = dev->ieee80211_ptr; 115 int err; 116 117 wdev_lock(wdev); 118 err = __cfg80211_join_mesh(rdev, dev, setup, conf); 119 wdev_unlock(wdev); 120 121 return err; 122 } 123 124 void cfg80211_notify_new_peer_candidate(struct net_device *dev, 125 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp) 126 { 127 struct wireless_dev *wdev = dev->ieee80211_ptr; 128 129 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT)) 130 return; 131 132 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev, 133 macaddr, ie, ie_len, gfp); 134 } 135 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate); 136 137 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 138 struct net_device *dev) 139 { 140 struct wireless_dev *wdev = dev->ieee80211_ptr; 141 int err; 142 143 ASSERT_WDEV_LOCK(wdev); 144 145 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 146 return -EOPNOTSUPP; 147 148 if (!rdev->ops->leave_mesh) 149 return -EOPNOTSUPP; 150 151 if (!wdev->mesh_id_len) 152 return -ENOTCONN; 153 154 err = rdev->ops->leave_mesh(&rdev->wiphy, dev); 155 if (!err) 156 wdev->mesh_id_len = 0; 157 return err; 158 } 159 160 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 161 struct net_device *dev) 162 { 163 struct wireless_dev *wdev = dev->ieee80211_ptr; 164 int err; 165 166 wdev_lock(wdev); 167 err = __cfg80211_leave_mesh(rdev, dev); 168 wdev_unlock(wdev); 169 170 return err; 171 } 172