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 | 46 | |
9bdbf04d MP |
47 | #define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units (=TUs) */ |
48 | #define MESH_DEFAULT_DTIM_PERIOD 2 | |
3b1c5a53 | 49 | #define MESH_DEFAULT_AWAKE_WINDOW 10 /* in 1024 us units (=TUs) */ |
9bdbf04d | 50 | |
29cbe68c JB |
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, | |
d299a1f2 | 60 | .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX, |
29cbe68c JB |
61 | .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT, |
62 | .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT, | |
dca7e943 | 63 | .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT, |
29cbe68c JB |
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, | |
0507e159 | 68 | .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL, |
16dd7267 | 69 | .dot11MeshGateAnnouncementProtocol = false, |
94f90656 | 70 | .dot11MeshForwarding = true, |
55335137 | 71 | .rssi_threshold = MESH_RSSI_THRESHOLD, |
70c33eaa | 72 | .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED, |
ac1073a6 CYY |
73 | .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT, |
74 | .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL, | |
728b19e5 | 75 | .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL, |
3b1c5a53 MP |
76 | .power_mode = NL80211_MESH_POWER_ACTIVE, |
77 | .dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW, | |
29cbe68c JB |
78 | }; |
79 | ||
c80d545d | 80 | const struct mesh_setup default_mesh_setup = { |
cc1d2806 | 81 | /* cfg80211_join_mesh() will pick a channel if needed */ |
d299a1f2 | 82 | .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET, |
c80d545d JC |
83 | .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, |
84 | .path_metric = IEEE80211_PATH_METRIC_AIRTIME, | |
581a8b0f JC |
85 | .ie = NULL, |
86 | .ie_len = 0, | |
5cff5e01 | 87 | .is_secure = false, |
bb2798d4 | 88 | .user_mpm = false, |
9bdbf04d MP |
89 | .beacon_interval = MESH_DEFAULT_BEACON_INTERVAL, |
90 | .dtim_period = MESH_DEFAULT_DTIM_PERIOD, | |
c80d545d | 91 | }; |
29cbe68c JB |
92 | |
93 | int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, | |
94 | struct net_device *dev, | |
cc1d2806 | 95 | struct mesh_setup *setup, |
29cbe68c JB |
96 | const struct mesh_config *conf) |
97 | { | |
98 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
29cbe68c JB |
99 | int err; |
100 | ||
101 | BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); | |
102 | ||
103 | ASSERT_WDEV_LOCK(wdev); | |
104 | ||
105 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) | |
106 | return -EOPNOTSUPP; | |
107 | ||
15d5dda6 JC |
108 | if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && |
109 | setup->is_secure) | |
110 | return -EOPNOTSUPP; | |
111 | ||
29cbe68c JB |
112 | if (wdev->mesh_id_len) |
113 | return -EALREADY; | |
114 | ||
c80d545d | 115 | if (!setup->mesh_id_len) |
29cbe68c JB |
116 | return -EINVAL; |
117 | ||
118 | if (!rdev->ops->join_mesh) | |
119 | return -EOPNOTSUPP; | |
120 | ||
683b6d3b | 121 | if (!setup->chandef.chan) { |
cc1d2806 | 122 | /* if no channel explicitly given, use preset channel */ |
683b6d3b | 123 | setup->chandef = wdev->preset_chandef; |
cc1d2806 JB |
124 | } |
125 | ||
683b6d3b | 126 | if (!setup->chandef.chan) { |
cc1d2806 JB |
127 | /* if we don't have that either, use the first usable channel */ |
128 | enum ieee80211_band band; | |
129 | ||
130 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
131 | struct ieee80211_supported_band *sband; | |
132 | struct ieee80211_channel *chan; | |
133 | int i; | |
134 | ||
135 | sband = rdev->wiphy.bands[band]; | |
136 | if (!sband) | |
137 | continue; | |
138 | ||
139 | for (i = 0; i < sband->n_channels; i++) { | |
140 | chan = &sband->channels[i]; | |
141 | if (chan->flags & (IEEE80211_CHAN_NO_IBSS | | |
142 | IEEE80211_CHAN_PASSIVE_SCAN | | |
143 | IEEE80211_CHAN_DISABLED | | |
144 | IEEE80211_CHAN_RADAR)) | |
145 | continue; | |
683b6d3b | 146 | setup->chandef.chan = chan; |
cc1d2806 JB |
147 | break; |
148 | } | |
149 | ||
683b6d3b | 150 | if (setup->chandef.chan) |
cc1d2806 JB |
151 | break; |
152 | } | |
153 | ||
154 | /* no usable channel ... */ | |
683b6d3b | 155 | if (!setup->chandef.chan) |
cc1d2806 JB |
156 | return -EINVAL; |
157 | ||
da29d2a5 MP |
158 | setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT; |
159 | setup->chandef.center_freq1 = setup->chandef.chan->center_freq; | |
cc1d2806 JB |
160 | } |
161 | ||
683b6d3b | 162 | if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef)) |
cc1d2806 JB |
163 | return -EINVAL; |
164 | ||
683b6d3b | 165 | err = cfg80211_can_use_chan(rdev, wdev, setup->chandef.chan, |
e4e32459 MK |
166 | CHAN_MODE_SHARED); |
167 | if (err) | |
168 | return err; | |
169 | ||
e35e4d28 | 170 | err = rdev_join_mesh(rdev, dev, conf, setup); |
29cbe68c | 171 | if (!err) { |
c80d545d JC |
172 | memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); |
173 | wdev->mesh_id_len = setup->mesh_id_len; | |
683b6d3b | 174 | wdev->channel = setup->chandef.chan; |
29cbe68c JB |
175 | } |
176 | ||
177 | return err; | |
178 | } | |
179 | ||
180 | int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, | |
181 | struct net_device *dev, | |
cc1d2806 | 182 | struct mesh_setup *setup, |
29cbe68c JB |
183 | const struct mesh_config *conf) |
184 | { | |
185 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
186 | int err; | |
187 | ||
e4e32459 | 188 | mutex_lock(&rdev->devlist_mtx); |
29cbe68c | 189 | wdev_lock(wdev); |
c80d545d | 190 | err = __cfg80211_join_mesh(rdev, dev, setup, conf); |
29cbe68c | 191 | wdev_unlock(wdev); |
e4e32459 | 192 | mutex_unlock(&rdev->devlist_mtx); |
29cbe68c JB |
193 | |
194 | return err; | |
195 | } | |
196 | ||
683b6d3b JB |
197 | int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, |
198 | struct wireless_dev *wdev, | |
199 | struct cfg80211_chan_def *chandef) | |
cc1d2806 | 200 | { |
f4489ebe | 201 | int err; |
cc1d2806 JB |
202 | |
203 | /* | |
204 | * Workaround for libertas (only!), it puts the interface | |
205 | * into mesh mode but doesn't implement join_mesh. Instead, | |
206 | * it is configured via sysfs and then joins the mesh when | |
207 | * you set the channel. Note that the libertas mesh isn't | |
208 | * compatible with 802.11 mesh. | |
209 | */ | |
e8c9bd5b | 210 | if (rdev->ops->libertas_set_mesh_channel) { |
3d9d1d66 | 211 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) |
e8c9bd5b | 212 | return -EINVAL; |
cc1d2806 JB |
213 | |
214 | if (!netif_running(wdev->netdev)) | |
215 | return -ENETDOWN; | |
f4489ebe | 216 | |
683b6d3b | 217 | err = cfg80211_can_use_chan(rdev, wdev, chandef->chan, |
e4e32459 MK |
218 | CHAN_MODE_SHARED); |
219 | if (err) | |
220 | return err; | |
221 | ||
e35e4d28 | 222 | err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev, |
683b6d3b | 223 | chandef->chan); |
f4489ebe | 224 | if (!err) |
683b6d3b | 225 | wdev->channel = chandef->chan; |
f4489ebe MK |
226 | |
227 | return err; | |
cc1d2806 JB |
228 | } |
229 | ||
230 | if (wdev->mesh_id_len) | |
231 | return -EBUSY; | |
232 | ||
683b6d3b | 233 | wdev->preset_chandef = *chandef; |
cc1d2806 JB |
234 | return 0; |
235 | } | |
236 | ||
29cbe68c JB |
237 | static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, |
238 | struct net_device *dev) | |
239 | { | |
240 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
241 | int err; | |
242 | ||
243 | ASSERT_WDEV_LOCK(wdev); | |
244 | ||
245 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) | |
246 | return -EOPNOTSUPP; | |
247 | ||
248 | if (!rdev->ops->leave_mesh) | |
249 | return -EOPNOTSUPP; | |
250 | ||
251 | if (!wdev->mesh_id_len) | |
252 | return -ENOTCONN; | |
253 | ||
e35e4d28 | 254 | err = rdev_leave_mesh(rdev, dev); |
f4489ebe | 255 | if (!err) { |
29cbe68c | 256 | wdev->mesh_id_len = 0; |
f4489ebe MK |
257 | wdev->channel = NULL; |
258 | } | |
259 | ||
29cbe68c JB |
260 | return err; |
261 | } | |
262 | ||
263 | int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, | |
264 | struct net_device *dev) | |
265 | { | |
266 | struct wireless_dev *wdev = dev->ieee80211_ptr; | |
267 | int err; | |
268 | ||
269 | wdev_lock(wdev); | |
270 | err = __cfg80211_leave_mesh(rdev, dev); | |
271 | wdev_unlock(wdev); | |
272 | ||
273 | return err; | |
274 | } |