Commit | Line | Data |
---|---|---|
29cbe68c | 1 | #include <linux/ieee80211.h> |
bc3b2d7f | 2 | #include <linux/export.h> |
29cbe68c | 3 | #include <net/cfg80211.h> |
c93b5e71 | 4 | #include "nl80211.h" |
29cbe68c | 5 | #include "core.h" |
e35e4d28 | 6 | #include "rdev-ops.h" |
29cbe68c JB |
7 | |
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 | |
15 | ||
16 | #define MESH_PATH_TIMEOUT 5000 | |
0507e159 | 17 | #define MESH_RANN_INTERVAL 5000 |
ac1073a6 CYY |
18 | #define MESH_PATH_TO_ROOT_TIMEOUT 6000 |
19 | #define MESH_ROOT_INTERVAL 5000 | |
728b19e5 | 20 | #define MESH_ROOT_CONFIRMATION_INTERVAL 2000 |
29cbe68c JB |
21 | |
22 | /* | |
23 | * Minimum interval between two consecutive PREQs originated by the same | |
24 | * interface | |
25 | */ | |
26 | #define MESH_PREQ_MIN_INT 10 | |
dca7e943 | 27 | #define MESH_PERR_MIN_INT 100 |
29cbe68c JB |
28 | #define MESH_DIAM_TRAVERSAL_TIME 50 |
29 | ||
55335137 AN |
30 | #define MESH_RSSI_THRESHOLD 0 |
31 | ||
29cbe68c JB |
32 | /* |
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. | |
36 | */ | |
37 | #define MESH_PATH_REFRESH_TIME 1000 | |
38 | #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME) | |
39 | ||
40 | /* Default maximum number of established plinks per interface */ | |
41 | #define MESH_MAX_ESTAB_PLINKS 32 | |
42 | ||
43 | #define MESH_MAX_PREQ_RETRIES 4 | |
44 | ||
d299a1f2 | 45 | #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50 |
29cbe68c JB |
46 | |
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, | |
d299a1f2 | 56 | .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX, |
29cbe68c JB |
57 | .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT, |
58 | .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT, | |
dca7e943 | 59 | .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT, |
29cbe68c JB |
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, | |
0507e159 | 64 | .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL, |
16dd7267 | 65 | .dot11MeshGateAnnouncementProtocol = false, |
94f90656 | 66 | .dot11MeshForwarding = true, |
55335137 | 67 | .rssi_threshold = MESH_RSSI_THRESHOLD, |
70c33eaa | 68 | .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED, |
ac1073a6 CYY |
69 | .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT, |
70 | .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL, | |
728b19e5 | 71 | .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL, |
29cbe68c JB |
72 | }; |
73 | ||
c80d545d | 74 | const struct mesh_setup default_mesh_setup = { |
cc1d2806 JB |
75 | /* cfg80211_join_mesh() will pick a channel if needed */ |
76 | .channel = NULL, | |
77 | .channel_type = NL80211_CHAN_NO_HT, | |
d299a1f2 | 78 | .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET, |
c80d545d JC |
79 | .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, |
80 | .path_metric = IEEE80211_PATH_METRIC_AIRTIME, | |
581a8b0f JC |
81 | .ie = NULL, |
82 | .ie_len = 0, | |
5cff5e01 | 83 | .is_secure = false, |
c80d545d | 84 | }; |
29cbe68c JB |
85 | |
86 | int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, | |
87 | struct net_device *dev, | |
cc1d2806 | 88 | struct mesh_setup *setup, |
29cbe68c JB |
89 | const struct mesh_config *conf) |
90 | { | |
91 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
29cbe68c JB |
92 | int err; |
93 | ||
94 | BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); | |
95 | ||
96 | ASSERT_WDEV_LOCK(wdev); | |
97 | ||
98 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) | |
99 | return -EOPNOTSUPP; | |
100 | ||
15d5dda6 JC |
101 | if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && |
102 | setup->is_secure) | |
103 | return -EOPNOTSUPP; | |
104 | ||
29cbe68c JB |
105 | if (wdev->mesh_id_len) |
106 | return -EALREADY; | |
107 | ||
c80d545d | 108 | if (!setup->mesh_id_len) |
29cbe68c JB |
109 | return -EINVAL; |
110 | ||
111 | if (!rdev->ops->join_mesh) | |
112 | return -EOPNOTSUPP; | |
113 | ||
cc1d2806 JB |
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; | |
118 | } | |
119 | ||
120 | if (!setup->channel) { | |
121 | /* if we don't have that either, use the first usable channel */ | |
122 | enum ieee80211_band band; | |
123 | ||
124 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
125 | struct ieee80211_supported_band *sband; | |
126 | struct ieee80211_channel *chan; | |
127 | int i; | |
128 | ||
129 | sband = rdev->wiphy.bands[band]; | |
130 | if (!sband) | |
131 | continue; | |
132 | ||
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)) | |
139 | continue; | |
140 | setup->channel = chan; | |
141 | break; | |
142 | } | |
143 | ||
144 | if (setup->channel) | |
145 | break; | |
146 | } | |
147 | ||
148 | /* no usable channel ... */ | |
149 | if (!setup->channel) | |
150 | return -EINVAL; | |
151 | ||
152 | setup->channel_type = NL80211_CHAN_NO_HT; | |
153 | } | |
154 | ||
155 | if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, setup->channel, | |
156 | setup->channel_type)) | |
157 | return -EINVAL; | |
158 | ||
e4e32459 MK |
159 | err = cfg80211_can_use_chan(rdev, wdev, setup->channel, |
160 | CHAN_MODE_SHARED); | |
161 | if (err) | |
162 | return err; | |
163 | ||
e35e4d28 | 164 | err = rdev_join_mesh(rdev, dev, conf, setup); |
29cbe68c | 165 | if (!err) { |
c80d545d JC |
166 | memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); |
167 | wdev->mesh_id_len = setup->mesh_id_len; | |
f4489ebe | 168 | wdev->channel = setup->channel; |
29cbe68c JB |
169 | } |
170 | ||
171 | return err; | |
172 | } | |
173 | ||
174 | int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, | |
175 | struct net_device *dev, | |
cc1d2806 | 176 | struct mesh_setup *setup, |
29cbe68c JB |
177 | const struct mesh_config *conf) |
178 | { | |
179 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
180 | int err; | |
181 | ||
e4e32459 | 182 | mutex_lock(&rdev->devlist_mtx); |
29cbe68c | 183 | wdev_lock(wdev); |
c80d545d | 184 | err = __cfg80211_join_mesh(rdev, dev, setup, conf); |
29cbe68c | 185 | wdev_unlock(wdev); |
e4e32459 | 186 | mutex_unlock(&rdev->devlist_mtx); |
29cbe68c JB |
187 | |
188 | return err; | |
189 | } | |
190 | ||
cc1d2806 JB |
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) | |
194 | { | |
195 | struct ieee80211_channel *channel; | |
f4489ebe | 196 | int err; |
cc1d2806 | 197 | |
e8c9bd5b JB |
198 | channel = rdev_freq_to_chan(rdev, freq, channel_type); |
199 | if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy, | |
200 | channel, | |
201 | channel_type)) { | |
202 | return -EINVAL; | |
203 | } | |
204 | ||
cc1d2806 JB |
205 | /* |
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. | |
211 | */ | |
e8c9bd5b JB |
212 | if (rdev->ops->libertas_set_mesh_channel) { |
213 | if (channel_type != NL80211_CHAN_NO_HT) | |
214 | return -EINVAL; | |
cc1d2806 JB |
215 | |
216 | if (!netif_running(wdev->netdev)) | |
217 | return -ENETDOWN; | |
f4489ebe | 218 | |
e4e32459 MK |
219 | err = cfg80211_can_use_chan(rdev, wdev, channel, |
220 | CHAN_MODE_SHARED); | |
221 | if (err) | |
222 | return err; | |
223 | ||
e35e4d28 HG |
224 | err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev, |
225 | channel); | |
f4489ebe MK |
226 | if (!err) |
227 | wdev->channel = channel; | |
228 | ||
229 | return err; | |
cc1d2806 JB |
230 | } |
231 | ||
232 | if (wdev->mesh_id_len) | |
233 | return -EBUSY; | |
234 | ||
cc1d2806 JB |
235 | wdev->preset_chan = channel; |
236 | wdev->preset_chantype = channel_type; | |
237 | return 0; | |
238 | } | |
239 | ||
c93b5e71 JC |
240 | void cfg80211_notify_new_peer_candidate(struct net_device *dev, |
241 | const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp) | |
242 | { | |
243 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
244 | ||
4ee3e063 | 245 | trace_cfg80211_notify_new_peer_candidate(dev, macaddr); |
c93b5e71 JC |
246 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT)) |
247 | return; | |
248 | ||
249 | nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev, | |
250 | macaddr, ie, ie_len, gfp); | |
251 | } | |
252 | EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate); | |
253 | ||
29cbe68c JB |
254 | static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, |
255 | struct net_device *dev) | |
256 | { | |
257 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
258 | int err; | |
259 | ||
260 | ASSERT_WDEV_LOCK(wdev); | |
261 | ||
262 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) | |
263 | return -EOPNOTSUPP; | |
264 | ||
265 | if (!rdev->ops->leave_mesh) | |
266 | return -EOPNOTSUPP; | |
267 | ||
268 | if (!wdev->mesh_id_len) | |
269 | return -ENOTCONN; | |
270 | ||
e35e4d28 | 271 | err = rdev_leave_mesh(rdev, dev); |
f4489ebe | 272 | if (!err) { |
29cbe68c | 273 | wdev->mesh_id_len = 0; |
f4489ebe MK |
274 | wdev->channel = NULL; |
275 | } | |
276 | ||
29cbe68c JB |
277 | return err; |
278 | } | |
279 | ||
280 | int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, | |
281 | struct net_device *dev) | |
282 | { | |
283 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
284 | int err; | |
285 | ||
286 | wdev_lock(wdev); | |
287 | err = __cfg80211_leave_mesh(rdev, dev); | |
288 | wdev_unlock(wdev); | |
289 | ||
290 | return err; | |
291 | } |