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 }; 59 60 const struct mesh_setup default_mesh_setup = { 61 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, 62 .path_metric = IEEE80211_PATH_METRIC_AIRTIME, 63 .ie = NULL, 64 .ie_len = 0, 65 .is_secure = false, 66 }; 67 68 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 69 struct net_device *dev, 70 const struct mesh_setup *setup, 71 const struct mesh_config *conf) 72 { 73 struct wireless_dev *wdev = dev->ieee80211_ptr; 74 int err; 75 76 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); 77 78 ASSERT_WDEV_LOCK(wdev); 79 80 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 81 return -EOPNOTSUPP; 82 83 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && 84 setup->is_secure) 85 return -EOPNOTSUPP; 86 87 if (wdev->mesh_id_len) 88 return -EALREADY; 89 90 if (!setup->mesh_id_len) 91 return -EINVAL; 92 93 if (!rdev->ops->join_mesh) 94 return -EOPNOTSUPP; 95 96 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup); 97 if (!err) { 98 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); 99 wdev->mesh_id_len = setup->mesh_id_len; 100 } 101 102 return err; 103 } 104 105 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 106 struct net_device *dev, 107 const struct mesh_setup *setup, 108 const struct mesh_config *conf) 109 { 110 struct wireless_dev *wdev = dev->ieee80211_ptr; 111 int err; 112 113 wdev_lock(wdev); 114 err = __cfg80211_join_mesh(rdev, dev, setup, conf); 115 wdev_unlock(wdev); 116 117 return err; 118 } 119 120 void cfg80211_notify_new_peer_candidate(struct net_device *dev, 121 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp) 122 { 123 struct wireless_dev *wdev = dev->ieee80211_ptr; 124 125 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT)) 126 return; 127 128 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev, 129 macaddr, ie, ie_len, gfp); 130 } 131 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate); 132 133 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 134 struct net_device *dev) 135 { 136 struct wireless_dev *wdev = dev->ieee80211_ptr; 137 int err; 138 139 ASSERT_WDEV_LOCK(wdev); 140 141 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 142 return -EOPNOTSUPP; 143 144 if (!rdev->ops->leave_mesh) 145 return -EOPNOTSUPP; 146 147 if (!wdev->mesh_id_len) 148 return -ENOTCONN; 149 150 err = rdev->ops->leave_mesh(&rdev->wiphy, dev); 151 if (!err) 152 wdev->mesh_id_len = 0; 153 return err; 154 } 155 156 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 157 struct net_device *dev) 158 { 159 struct wireless_dev *wdev = dev->ieee80211_ptr; 160 int err; 161 162 wdev_lock(wdev); 163 err = __cfg80211_leave_mesh(rdev, dev); 164 wdev_unlock(wdev); 165 166 return err; 167 } 168