1 #include <linux/ieee80211.h> 2 #include <net/cfg80211.h> 3 #include "core.h" 4 5 /* Default values, timeouts in ms */ 6 #define MESH_TTL 31 7 #define MESH_DEFAULT_ELEMENT_TTL 31 8 #define MESH_MAX_RETR 3 9 #define MESH_RET_T 100 10 #define MESH_CONF_T 100 11 #define MESH_HOLD_T 100 12 13 #define MESH_PATH_TIMEOUT 5000 14 15 /* 16 * Minimum interval between two consecutive PREQs originated by the same 17 * interface 18 */ 19 #define MESH_PREQ_MIN_INT 10 20 #define MESH_DIAM_TRAVERSAL_TIME 50 21 22 /* 23 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds 24 * before timing out. This way it will remain ACTIVE and no data frames 25 * will be unnecessarily held in the pending queue. 26 */ 27 #define MESH_PATH_REFRESH_TIME 1000 28 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME) 29 30 /* Default maximum number of established plinks per interface */ 31 #define MESH_MAX_ESTAB_PLINKS 32 32 33 #define MESH_MAX_PREQ_RETRIES 4 34 35 36 const struct mesh_config default_mesh_config = { 37 .dot11MeshRetryTimeout = MESH_RET_T, 38 .dot11MeshConfirmTimeout = MESH_CONF_T, 39 .dot11MeshHoldingTimeout = MESH_HOLD_T, 40 .dot11MeshMaxRetries = MESH_MAX_RETR, 41 .dot11MeshTTL = MESH_TTL, 42 .element_ttl = MESH_DEFAULT_ELEMENT_TTL, 43 .auto_open_plinks = true, 44 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS, 45 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT, 46 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT, 47 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME, 48 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES, 49 .path_refresh_time = MESH_PATH_REFRESH_TIME, 50 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT, 51 }; 52 53 const struct mesh_setup default_mesh_setup = { 54 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, 55 .path_metric = IEEE80211_PATH_METRIC_AIRTIME, 56 .vendor_ie = NULL, 57 .vendor_ie_len = 0, 58 }; 59 60 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 61 struct net_device *dev, 62 const struct mesh_setup *setup, 63 const struct mesh_config *conf) 64 { 65 struct wireless_dev *wdev = dev->ieee80211_ptr; 66 int err; 67 68 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); 69 70 ASSERT_WDEV_LOCK(wdev); 71 72 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 73 return -EOPNOTSUPP; 74 75 if (wdev->mesh_id_len) 76 return -EALREADY; 77 78 if (!setup->mesh_id_len) 79 return -EINVAL; 80 81 if (!rdev->ops->join_mesh) 82 return -EOPNOTSUPP; 83 84 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup); 85 if (!err) { 86 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); 87 wdev->mesh_id_len = setup->mesh_id_len; 88 } 89 90 return err; 91 } 92 93 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 94 struct net_device *dev, 95 const struct mesh_setup *setup, 96 const struct mesh_config *conf) 97 { 98 struct wireless_dev *wdev = dev->ieee80211_ptr; 99 int err; 100 101 wdev_lock(wdev); 102 err = __cfg80211_join_mesh(rdev, dev, setup, conf); 103 wdev_unlock(wdev); 104 105 return err; 106 } 107 108 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 109 struct net_device *dev) 110 { 111 struct wireless_dev *wdev = dev->ieee80211_ptr; 112 int err; 113 114 ASSERT_WDEV_LOCK(wdev); 115 116 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 117 return -EOPNOTSUPP; 118 119 if (!rdev->ops->leave_mesh) 120 return -EOPNOTSUPP; 121 122 if (!wdev->mesh_id_len) 123 return -ENOTCONN; 124 125 err = rdev->ops->leave_mesh(&rdev->wiphy, dev); 126 if (!err) 127 wdev->mesh_id_len = 0; 128 return err; 129 } 130 131 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 wdev_lock(wdev); 138 err = __cfg80211_leave_mesh(rdev, dev); 139 wdev_unlock(wdev); 140 141 return err; 142 } 143