1 #include <linux/ieee80211.h>
2 #include <linux/export.h>
3 #include <net/cfg80211.h>
8 /* Default values, timeouts in ms */
10 #define MESH_DEFAULT_ELEMENT_TTL 31
11 #define MESH_MAX_RETR 3
12 #define MESH_RET_T 100
13 #define MESH_CONF_T 100
14 #define MESH_HOLD_T 100
16 #define MESH_PATH_TIMEOUT 5000
17 #define MESH_RANN_INTERVAL 5000
18 #define MESH_PATH_TO_ROOT_TIMEOUT 6000
19 #define MESH_ROOT_INTERVAL 5000
20 #define MESH_ROOT_CONFIRMATION_INTERVAL 2000
23 * Minimum interval between two consecutive PREQs originated by the same
26 #define MESH_PREQ_MIN_INT 10
27 #define MESH_PERR_MIN_INT 100
28 #define MESH_DIAM_TRAVERSAL_TIME 50
30 #define MESH_RSSI_THRESHOLD 0
33 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
34 * before timing out. This way it will remain ACTIVE and no data frames
35 * will be unnecessarily held in the pending queue.
37 #define MESH_PATH_REFRESH_TIME 1000
38 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
40 /* Default maximum number of established plinks per interface */
41 #define MESH_MAX_ESTAB_PLINKS 32
43 #define MESH_MAX_PREQ_RETRIES 4
45 #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
47 const struct mesh_config default_mesh_config = {
48 .dot11MeshRetryTimeout = MESH_RET_T,
49 .dot11MeshConfirmTimeout = MESH_CONF_T,
50 .dot11MeshHoldingTimeout = MESH_HOLD_T,
51 .dot11MeshMaxRetries = MESH_MAX_RETR,
52 .dot11MeshTTL = MESH_TTL,
53 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
54 .auto_open_plinks = true,
55 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
56 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
57 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
58 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
59 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
60 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
61 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
62 .path_refresh_time = MESH_PATH_REFRESH_TIME,
63 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
64 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
65 .dot11MeshGateAnnouncementProtocol = false,
66 .dot11MeshForwarding = true,
67 .rssi_threshold = MESH_RSSI_THRESHOLD,
68 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
69 .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
70 .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
71 .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
74 const struct mesh_setup default_mesh_setup = {
75 /* cfg80211_join_mesh() will pick a channel if needed */
77 .channel_type = NL80211_CHAN_NO_HT,
78 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
79 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
80 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
86 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
87 struct net_device *dev,
88 struct mesh_setup *setup,
89 const struct mesh_config *conf)
91 struct wireless_dev *wdev = dev->ieee80211_ptr;
94 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
96 ASSERT_WDEV_LOCK(wdev);
98 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
101 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
105 if (wdev->mesh_id_len)
108 if (!setup->mesh_id_len)
111 if (!rdev->ops->join_mesh)
114 if (!setup->channel) {
115 /* if no channel explicitly given, use preset channel */
116 setup->channel = wdev->preset_chan;
117 setup->channel_type = wdev->preset_chantype;
120 if (!setup->channel) {
121 /* if we don't have that either, use the first usable channel */
122 enum ieee80211_band band;
124 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
125 struct ieee80211_supported_band *sband;
126 struct ieee80211_channel *chan;
129 sband = rdev->wiphy.bands[band];
133 for (i = 0; i < sband->n_channels; i++) {
134 chan = &sband->channels[i];
135 if (chan->flags & (IEEE80211_CHAN_NO_IBSS |
136 IEEE80211_CHAN_PASSIVE_SCAN |
137 IEEE80211_CHAN_DISABLED |
138 IEEE80211_CHAN_RADAR))
140 setup->channel = chan;
148 /* no usable channel ... */
152 setup->channel_type = NL80211_CHAN_NO_HT;
155 if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, setup->channel,
156 setup->channel_type))
159 err = cfg80211_can_use_chan(rdev, wdev, setup->channel,
164 err = rdev_join_mesh(rdev, dev, conf, setup);
166 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
167 wdev->mesh_id_len = setup->mesh_id_len;
168 wdev->channel = setup->channel;
174 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
175 struct net_device *dev,
176 struct mesh_setup *setup,
177 const struct mesh_config *conf)
179 struct wireless_dev *wdev = dev->ieee80211_ptr;
182 mutex_lock(&rdev->devlist_mtx);
184 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
186 mutex_unlock(&rdev->devlist_mtx);
191 int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
192 struct wireless_dev *wdev, int freq,
193 enum nl80211_channel_type channel_type)
195 struct ieee80211_channel *channel;
198 channel = rdev_freq_to_chan(rdev, freq, channel_type);
199 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
206 * Workaround for libertas (only!), it puts the interface
207 * into mesh mode but doesn't implement join_mesh. Instead,
208 * it is configured via sysfs and then joins the mesh when
209 * you set the channel. Note that the libertas mesh isn't
210 * compatible with 802.11 mesh.
212 if (rdev->ops->libertas_set_mesh_channel) {
213 if (channel_type != NL80211_CHAN_NO_HT)
216 if (!netif_running(wdev->netdev))
219 err = cfg80211_can_use_chan(rdev, wdev, channel,
224 err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev,
227 wdev->channel = channel;
232 if (wdev->mesh_id_len)
235 wdev->preset_chan = channel;
236 wdev->preset_chantype = channel_type;
240 void cfg80211_notify_new_peer_candidate(struct net_device *dev,
241 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
243 struct wireless_dev *wdev = dev->ieee80211_ptr;
245 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
248 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
249 macaddr, ie, ie_len, gfp);
251 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
253 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
254 struct net_device *dev)
256 struct wireless_dev *wdev = dev->ieee80211_ptr;
259 ASSERT_WDEV_LOCK(wdev);
261 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
264 if (!rdev->ops->leave_mesh)
267 if (!wdev->mesh_id_len)
270 err = rdev_leave_mesh(rdev, dev);
272 wdev->mesh_id_len = 0;
273 wdev->channel = NULL;
279 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
280 struct net_device *dev)
282 struct wireless_dev *wdev = dev->ieee80211_ptr;
286 err = __cfg80211_leave_mesh(rdev, dev);