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