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Commit | Line | Data |
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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 | 75 | /* cfg80211_join_mesh() will pick a channel if needed */ |
d299a1f2 | 76 | .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET, |
c80d545d JC |
77 | .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, |
78 | .path_metric = IEEE80211_PATH_METRIC_AIRTIME, | |
581a8b0f JC |
79 | .ie = NULL, |
80 | .ie_len = 0, | |
5cff5e01 | 81 | .is_secure = false, |
c80d545d | 82 | }; |
29cbe68c JB |
83 | |
84 | int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, | |
85 | struct net_device *dev, | |
cc1d2806 | 86 | struct mesh_setup *setup, |
29cbe68c JB |
87 | const struct mesh_config *conf) |
88 | { | |
89 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
29cbe68c JB |
90 | int err; |
91 | ||
92 | BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); | |
93 | ||
94 | ASSERT_WDEV_LOCK(wdev); | |
95 | ||
96 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) | |
97 | return -EOPNOTSUPP; | |
98 | ||
15d5dda6 JC |
99 | if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && |
100 | setup->is_secure) | |
101 | return -EOPNOTSUPP; | |
102 | ||
29cbe68c JB |
103 | if (wdev->mesh_id_len) |
104 | return -EALREADY; | |
105 | ||
c80d545d | 106 | if (!setup->mesh_id_len) |
29cbe68c JB |
107 | return -EINVAL; |
108 | ||
109 | if (!rdev->ops->join_mesh) | |
110 | return -EOPNOTSUPP; | |
111 | ||
683b6d3b | 112 | if (!setup->chandef.chan) { |
cc1d2806 | 113 | /* if no channel explicitly given, use preset channel */ |
683b6d3b | 114 | setup->chandef = wdev->preset_chandef; |
cc1d2806 JB |
115 | } |
116 | ||
683b6d3b | 117 | if (!setup->chandef.chan) { |
cc1d2806 JB |
118 | /* if we don't have that either, use the first usable channel */ |
119 | enum ieee80211_band band; | |
120 | ||
121 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
122 | struct ieee80211_supported_band *sband; | |
123 | struct ieee80211_channel *chan; | |
124 | int i; | |
125 | ||
126 | sband = rdev->wiphy.bands[band]; | |
127 | if (!sband) | |
128 | continue; | |
129 | ||
130 | for (i = 0; i < sband->n_channels; i++) { | |
131 | chan = &sband->channels[i]; | |
132 | if (chan->flags & (IEEE80211_CHAN_NO_IBSS | | |
133 | IEEE80211_CHAN_PASSIVE_SCAN | | |
134 | IEEE80211_CHAN_DISABLED | | |
135 | IEEE80211_CHAN_RADAR)) | |
136 | continue; | |
683b6d3b | 137 | setup->chandef.chan = chan; |
cc1d2806 JB |
138 | break; |
139 | } | |
140 | ||
683b6d3b | 141 | if (setup->chandef.chan) |
cc1d2806 JB |
142 | break; |
143 | } | |
144 | ||
145 | /* no usable channel ... */ | |
683b6d3b | 146 | if (!setup->chandef.chan) |
cc1d2806 JB |
147 | return -EINVAL; |
148 | ||
da29d2a5 MP |
149 | setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT; |
150 | setup->chandef.center_freq1 = setup->chandef.chan->center_freq; | |
cc1d2806 JB |
151 | } |
152 | ||
683b6d3b | 153 | if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef)) |
cc1d2806 JB |
154 | return -EINVAL; |
155 | ||
683b6d3b | 156 | err = cfg80211_can_use_chan(rdev, wdev, setup->chandef.chan, |
e4e32459 MK |
157 | CHAN_MODE_SHARED); |
158 | if (err) | |
159 | return err; | |
160 | ||
e35e4d28 | 161 | err = rdev_join_mesh(rdev, dev, conf, setup); |
29cbe68c | 162 | if (!err) { |
c80d545d JC |
163 | memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); |
164 | wdev->mesh_id_len = setup->mesh_id_len; | |
683b6d3b | 165 | wdev->channel = setup->chandef.chan; |
29cbe68c JB |
166 | } |
167 | ||
168 | return err; | |
169 | } | |
170 | ||
171 | int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, | |
172 | struct net_device *dev, | |
cc1d2806 | 173 | struct mesh_setup *setup, |
29cbe68c JB |
174 | const struct mesh_config *conf) |
175 | { | |
176 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
177 | int err; | |
178 | ||
e4e32459 | 179 | mutex_lock(&rdev->devlist_mtx); |
29cbe68c | 180 | wdev_lock(wdev); |
c80d545d | 181 | err = __cfg80211_join_mesh(rdev, dev, setup, conf); |
29cbe68c | 182 | wdev_unlock(wdev); |
e4e32459 | 183 | mutex_unlock(&rdev->devlist_mtx); |
29cbe68c JB |
184 | |
185 | return err; | |
186 | } | |
187 | ||
683b6d3b JB |
188 | int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, |
189 | struct wireless_dev *wdev, | |
190 | struct cfg80211_chan_def *chandef) | |
cc1d2806 | 191 | { |
f4489ebe | 192 | int err; |
cc1d2806 JB |
193 | |
194 | /* | |
195 | * Workaround for libertas (only!), it puts the interface | |
196 | * into mesh mode but doesn't implement join_mesh. Instead, | |
197 | * it is configured via sysfs and then joins the mesh when | |
198 | * you set the channel. Note that the libertas mesh isn't | |
199 | * compatible with 802.11 mesh. | |
200 | */ | |
e8c9bd5b | 201 | if (rdev->ops->libertas_set_mesh_channel) { |
3d9d1d66 | 202 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) |
e8c9bd5b | 203 | return -EINVAL; |
cc1d2806 JB |
204 | |
205 | if (!netif_running(wdev->netdev)) | |
206 | return -ENETDOWN; | |
f4489ebe | 207 | |
683b6d3b | 208 | err = cfg80211_can_use_chan(rdev, wdev, chandef->chan, |
e4e32459 MK |
209 | CHAN_MODE_SHARED); |
210 | if (err) | |
211 | return err; | |
212 | ||
e35e4d28 | 213 | err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev, |
683b6d3b | 214 | chandef->chan); |
f4489ebe | 215 | if (!err) |
683b6d3b | 216 | wdev->channel = chandef->chan; |
f4489ebe MK |
217 | |
218 | return err; | |
cc1d2806 JB |
219 | } |
220 | ||
221 | if (wdev->mesh_id_len) | |
222 | return -EBUSY; | |
223 | ||
683b6d3b | 224 | wdev->preset_chandef = *chandef; |
cc1d2806 JB |
225 | return 0; |
226 | } | |
227 | ||
c93b5e71 JC |
228 | void cfg80211_notify_new_peer_candidate(struct net_device *dev, |
229 | const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp) | |
230 | { | |
231 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
232 | ||
4ee3e063 | 233 | trace_cfg80211_notify_new_peer_candidate(dev, macaddr); |
c93b5e71 JC |
234 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT)) |
235 | return; | |
236 | ||
237 | nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev, | |
238 | macaddr, ie, ie_len, gfp); | |
239 | } | |
240 | EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate); | |
241 | ||
29cbe68c JB |
242 | static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, |
243 | struct net_device *dev) | |
244 | { | |
245 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
246 | int err; | |
247 | ||
248 | ASSERT_WDEV_LOCK(wdev); | |
249 | ||
250 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) | |
251 | return -EOPNOTSUPP; | |
252 | ||
253 | if (!rdev->ops->leave_mesh) | |
254 | return -EOPNOTSUPP; | |
255 | ||
256 | if (!wdev->mesh_id_len) | |
257 | return -ENOTCONN; | |
258 | ||
e35e4d28 | 259 | err = rdev_leave_mesh(rdev, dev); |
f4489ebe | 260 | if (!err) { |
29cbe68c | 261 | wdev->mesh_id_len = 0; |
f4489ebe MK |
262 | wdev->channel = NULL; |
263 | } | |
264 | ||
29cbe68c JB |
265 | return err; |
266 | } | |
267 | ||
268 | int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, | |
269 | struct net_device *dev) | |
270 | { | |
271 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
272 | int err; | |
273 | ||
274 | wdev_lock(wdev); | |
275 | err = __cfg80211_leave_mesh(rdev, dev); | |
276 | wdev_unlock(wdev); | |
277 | ||
278 | return err; | |
279 | } |