1 #include <linux/ieee80211.h>
2 #include <linux/export.h>
3 #include <net/cfg80211.h>
7 /* Default values, timeouts in ms */
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
15 #define MESH_PATH_TIMEOUT 5000
16 #define MESH_RANN_INTERVAL 5000
19 * Minimum interval between two consecutive PREQs originated by the same
22 #define MESH_PREQ_MIN_INT 10
23 #define MESH_PERR_MIN_INT 100
24 #define MESH_DIAM_TRAVERSAL_TIME 50
26 #define MESH_RSSI_THRESHOLD 0
29 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
30 * before timing out. This way it will remain ACTIVE and no data frames
31 * will be unnecessarily held in the pending queue.
33 #define MESH_PATH_REFRESH_TIME 1000
34 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
36 /* Default maximum number of established plinks per interface */
37 #define MESH_MAX_ESTAB_PLINKS 32
39 #define MESH_MAX_PREQ_RETRIES 4
41 #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
43 const struct mesh_config default_mesh_config = {
44 .dot11MeshRetryTimeout = MESH_RET_T,
45 .dot11MeshConfirmTimeout = MESH_CONF_T,
46 .dot11MeshHoldingTimeout = MESH_HOLD_T,
47 .dot11MeshMaxRetries = MESH_MAX_RETR,
48 .dot11MeshTTL = MESH_TTL,
49 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
50 .auto_open_plinks = true,
51 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
52 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
53 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
54 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
55 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
56 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
57 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
58 .path_refresh_time = MESH_PATH_REFRESH_TIME,
59 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
60 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
61 .dot11MeshGateAnnouncementProtocol = false,
62 .dot11MeshForwarding = true,
63 .rssi_threshold = MESH_RSSI_THRESHOLD,
64 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
67 const struct mesh_setup default_mesh_setup = {
68 /* cfg80211_join_mesh() will pick a channel if needed */
70 .channel_type = NL80211_CHAN_NO_HT,
71 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
72 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
73 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
79 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
80 struct net_device *dev,
81 struct mesh_setup *setup,
82 const struct mesh_config *conf)
84 struct wireless_dev *wdev = dev->ieee80211_ptr;
87 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
89 ASSERT_WDEV_LOCK(wdev);
91 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
94 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
98 if (wdev->mesh_id_len)
101 if (!setup->mesh_id_len)
104 if (!rdev->ops->join_mesh)
107 if (!setup->channel) {
108 /* if no channel explicitly given, use preset channel */
109 setup->channel = wdev->preset_chan;
110 setup->channel_type = wdev->preset_chantype;
113 if (!setup->channel) {
114 /* if we don't have that either, use the first usable channel */
115 enum ieee80211_band band;
117 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
118 struct ieee80211_supported_band *sband;
119 struct ieee80211_channel *chan;
122 sband = rdev->wiphy.bands[band];
126 for (i = 0; i < sband->n_channels; i++) {
127 chan = &sband->channels[i];
128 if (chan->flags & (IEEE80211_CHAN_NO_IBSS |
129 IEEE80211_CHAN_PASSIVE_SCAN |
130 IEEE80211_CHAN_DISABLED |
131 IEEE80211_CHAN_RADAR))
133 setup->channel = chan;
141 /* no usable channel ... */
145 setup->channel_type = NL80211_CHAN_NO_HT;
148 if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, setup->channel,
149 setup->channel_type))
152 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
154 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
155 wdev->mesh_id_len = setup->mesh_id_len;
161 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
162 struct net_device *dev,
163 struct mesh_setup *setup,
164 const struct mesh_config *conf)
166 struct wireless_dev *wdev = dev->ieee80211_ptr;
170 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
176 int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
177 struct wireless_dev *wdev, int freq,
178 enum nl80211_channel_type channel_type)
180 struct ieee80211_channel *channel;
182 channel = rdev_freq_to_chan(rdev, freq, channel_type);
183 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
190 * Workaround for libertas (only!), it puts the interface
191 * into mesh mode but doesn't implement join_mesh. Instead,
192 * it is configured via sysfs and then joins the mesh when
193 * you set the channel. Note that the libertas mesh isn't
194 * compatible with 802.11 mesh.
196 if (rdev->ops->libertas_set_mesh_channel) {
197 if (channel_type != NL80211_CHAN_NO_HT)
200 if (!netif_running(wdev->netdev))
202 return rdev->ops->libertas_set_mesh_channel(&rdev->wiphy,
207 if (wdev->mesh_id_len)
210 wdev->preset_chan = channel;
211 wdev->preset_chantype = channel_type;
215 void cfg80211_notify_new_peer_candidate(struct net_device *dev,
216 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
218 struct wireless_dev *wdev = dev->ieee80211_ptr;
220 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
223 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
224 macaddr, ie, ie_len, gfp);
226 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
228 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
229 struct net_device *dev)
231 struct wireless_dev *wdev = dev->ieee80211_ptr;
234 ASSERT_WDEV_LOCK(wdev);
236 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
239 if (!rdev->ops->leave_mesh)
242 if (!wdev->mesh_id_len)
245 err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
247 wdev->mesh_id_len = 0;
251 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
252 struct net_device *dev)
254 struct wireless_dev *wdev = dev->ieee80211_ptr;
258 err = __cfg80211_leave_mesh(rdev, dev);