KMS: fix EDID detailed timing vsync parsing
[linux-2.6/cjktty.git] / net / wireless / mesh.c
blob55957a284f6c7e82c9b403dae01798316224ad49
1 #include <linux/ieee80211.h>
2 #include <linux/export.h>
3 #include <net/cfg80211.h>
4 #include "nl80211.h"
5 #include "core.h"
6 #include "rdev-ops.h"
8 /* Default values, timeouts in ms */
9 #define MESH_TTL 31
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
24 * interface
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 #define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units (=TUs) */
48 #define MESH_DEFAULT_DTIM_PERIOD 2
49 #define MESH_DEFAULT_AWAKE_WINDOW 10 /* in 1024 us units (=TUs) */
51 const struct mesh_config default_mesh_config = {
52 .dot11MeshRetryTimeout = MESH_RET_T,
53 .dot11MeshConfirmTimeout = MESH_CONF_T,
54 .dot11MeshHoldingTimeout = MESH_HOLD_T,
55 .dot11MeshMaxRetries = MESH_MAX_RETR,
56 .dot11MeshTTL = MESH_TTL,
57 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
58 .auto_open_plinks = true,
59 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
60 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
61 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
62 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
63 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
64 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
65 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
66 .path_refresh_time = MESH_PATH_REFRESH_TIME,
67 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
68 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
69 .dot11MeshGateAnnouncementProtocol = false,
70 .dot11MeshForwarding = true,
71 .rssi_threshold = MESH_RSSI_THRESHOLD,
72 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
73 .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
74 .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
75 .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
76 .power_mode = NL80211_MESH_POWER_ACTIVE,
77 .dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
80 const struct mesh_setup default_mesh_setup = {
81 /* cfg80211_join_mesh() will pick a channel if needed */
82 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
83 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
84 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
85 .ie = NULL,
86 .ie_len = 0,
87 .is_secure = false,
88 .beacon_interval = MESH_DEFAULT_BEACON_INTERVAL,
89 .dtim_period = MESH_DEFAULT_DTIM_PERIOD,
92 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
93 struct net_device *dev,
94 struct mesh_setup *setup,
95 const struct mesh_config *conf)
97 struct wireless_dev *wdev = dev->ieee80211_ptr;
98 int err;
100 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
102 ASSERT_WDEV_LOCK(wdev);
104 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
105 return -EOPNOTSUPP;
107 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
108 setup->is_secure)
109 return -EOPNOTSUPP;
111 if (wdev->mesh_id_len)
112 return -EALREADY;
114 if (!setup->mesh_id_len)
115 return -EINVAL;
117 if (!rdev->ops->join_mesh)
118 return -EOPNOTSUPP;
120 if (!setup->chandef.chan) {
121 /* if no channel explicitly given, use preset channel */
122 setup->chandef = wdev->preset_chandef;
125 if (!setup->chandef.chan) {
126 /* if we don't have that either, use the first usable channel */
127 enum ieee80211_band band;
129 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
130 struct ieee80211_supported_band *sband;
131 struct ieee80211_channel *chan;
132 int i;
134 sband = rdev->wiphy.bands[band];
135 if (!sband)
136 continue;
138 for (i = 0; i < sband->n_channels; i++) {
139 chan = &sband->channels[i];
140 if (chan->flags & (IEEE80211_CHAN_NO_IBSS |
141 IEEE80211_CHAN_PASSIVE_SCAN |
142 IEEE80211_CHAN_DISABLED |
143 IEEE80211_CHAN_RADAR))
144 continue;
145 setup->chandef.chan = chan;
146 break;
149 if (setup->chandef.chan)
150 break;
153 /* no usable channel ... */
154 if (!setup->chandef.chan)
155 return -EINVAL;
157 setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
158 setup->chandef.center_freq1 = setup->chandef.chan->center_freq;
161 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef))
162 return -EINVAL;
164 err = cfg80211_can_use_chan(rdev, wdev, setup->chandef.chan,
165 CHAN_MODE_SHARED);
166 if (err)
167 return err;
169 err = rdev_join_mesh(rdev, dev, conf, setup);
170 if (!err) {
171 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
172 wdev->mesh_id_len = setup->mesh_id_len;
173 wdev->channel = setup->chandef.chan;
176 return err;
179 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
180 struct net_device *dev,
181 struct mesh_setup *setup,
182 const struct mesh_config *conf)
184 struct wireless_dev *wdev = dev->ieee80211_ptr;
185 int err;
187 mutex_lock(&rdev->devlist_mtx);
188 wdev_lock(wdev);
189 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
190 wdev_unlock(wdev);
191 mutex_unlock(&rdev->devlist_mtx);
193 return err;
196 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
197 struct wireless_dev *wdev,
198 struct cfg80211_chan_def *chandef)
200 int err;
203 * Workaround for libertas (only!), it puts the interface
204 * into mesh mode but doesn't implement join_mesh. Instead,
205 * it is configured via sysfs and then joins the mesh when
206 * you set the channel. Note that the libertas mesh isn't
207 * compatible with 802.11 mesh.
209 if (rdev->ops->libertas_set_mesh_channel) {
210 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
211 return -EINVAL;
213 if (!netif_running(wdev->netdev))
214 return -ENETDOWN;
216 err = cfg80211_can_use_chan(rdev, wdev, chandef->chan,
217 CHAN_MODE_SHARED);
218 if (err)
219 return err;
221 err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev,
222 chandef->chan);
223 if (!err)
224 wdev->channel = chandef->chan;
226 return err;
229 if (wdev->mesh_id_len)
230 return -EBUSY;
232 wdev->preset_chandef = *chandef;
233 return 0;
236 void cfg80211_notify_new_peer_candidate(struct net_device *dev,
237 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
239 struct wireless_dev *wdev = dev->ieee80211_ptr;
241 trace_cfg80211_notify_new_peer_candidate(dev, macaddr);
242 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
243 return;
245 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
246 macaddr, ie, ie_len, gfp);
248 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
250 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
251 struct net_device *dev)
253 struct wireless_dev *wdev = dev->ieee80211_ptr;
254 int err;
256 ASSERT_WDEV_LOCK(wdev);
258 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
259 return -EOPNOTSUPP;
261 if (!rdev->ops->leave_mesh)
262 return -EOPNOTSUPP;
264 if (!wdev->mesh_id_len)
265 return -ENOTCONN;
267 err = rdev_leave_mesh(rdev, dev);
268 if (!err) {
269 wdev->mesh_id_len = 0;
270 wdev->channel = NULL;
273 return err;
276 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
277 struct net_device *dev)
279 struct wireless_dev *wdev = dev->ieee80211_ptr;
280 int err;
282 wdev_lock(wdev);
283 err = __cfg80211_leave_mesh(rdev, dev);
284 wdev_unlock(wdev);
286 return err;