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