1#include <linux/ieee80211.h>
2#include <linux/export.h>
3#include <net/cfg80211.h>
4#include "nl80211.h"
5#include "core.h"
6
7
8#define MESH_TTL 31
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
14
15#define MESH_PATH_TIMEOUT 5000
16#define MESH_RANN_INTERVAL 5000
17#define MESH_PATH_TO_ROOT_TIMEOUT 6000
18#define MESH_ROOT_INTERVAL 5000
19#define MESH_ROOT_CONFIRMATION_INTERVAL 2000
20
21
22
23
24
25#define MESH_PREQ_MIN_INT 10
26#define MESH_PERR_MIN_INT 100
27#define MESH_DIAM_TRAVERSAL_TIME 50
28
29#define MESH_RSSI_THRESHOLD 0
30
31
32
33
34
35
36#define MESH_PATH_REFRESH_TIME 1000
37#define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
38
39
40#define MESH_MAX_ESTAB_PLINKS 32
41
42#define MESH_MAX_PREQ_RETRIES 4
43
44#define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
45
46const struct mesh_config default_mesh_config = {
47 .dot11MeshRetryTimeout = MESH_RET_T,
48 .dot11MeshConfirmTimeout = MESH_CONF_T,
49 .dot11MeshHoldingTimeout = MESH_HOLD_T,
50 .dot11MeshMaxRetries = MESH_MAX_RETR,
51 .dot11MeshTTL = MESH_TTL,
52 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
53 .auto_open_plinks = true,
54 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
55 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
56 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
57 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
58 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
59 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
60 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
61 .path_refresh_time = MESH_PATH_REFRESH_TIME,
62 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
63 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
64 .dot11MeshGateAnnouncementProtocol = false,
65 .dot11MeshForwarding = true,
66 .rssi_threshold = MESH_RSSI_THRESHOLD,
67 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
68 .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
69 .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
70 .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
71};
72
73const struct mesh_setup default_mesh_setup = {
74
75 .channel = NULL,
76 .channel_type = NL80211_CHAN_NO_HT,
77 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
78 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
79 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
80 .ie = NULL,
81 .ie_len = 0,
82 .is_secure = false,
83};
84
85int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
86 struct net_device *dev,
87 struct mesh_setup *setup,
88 const struct mesh_config *conf)
89{
90 struct wireless_dev *wdev = dev->ieee80211_ptr;
91 int err;
92
93 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
94
95 ASSERT_WDEV_LOCK(wdev);
96
97 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
98 return -EOPNOTSUPP;
99
100 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
101 setup->is_secure)
102 return -EOPNOTSUPP;
103
104 if (wdev->mesh_id_len)
105 return -EALREADY;
106
107 if (!setup->mesh_id_len)
108 return -EINVAL;
109
110 if (!rdev->ops->join_mesh)
111 return -EOPNOTSUPP;
112
113 if (!setup->channel) {
114
115 setup->channel = wdev->preset_chan;
116 setup->channel_type = wdev->preset_chantype;
117 }
118
119 if (!setup->channel) {
120
121 enum ieee80211_band band;
122
123 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
124 struct ieee80211_supported_band *sband;
125 struct ieee80211_channel *chan;
126 int i;
127
128 sband = rdev->wiphy.bands[band];
129 if (!sband)
130 continue;
131
132 for (i = 0; i < sband->n_channels; i++) {
133 chan = &sband->channels[i];
134 if (chan->flags & (IEEE80211_CHAN_NO_IBSS |
135 IEEE80211_CHAN_PASSIVE_SCAN |
136 IEEE80211_CHAN_DISABLED |
137 IEEE80211_CHAN_RADAR))
138 continue;
139 setup->channel = chan;
140 break;
141 }
142
143 if (setup->channel)
144 break;
145 }
146
147
148 if (!setup->channel)
149 return -EINVAL;
150
151 setup->channel_type = NL80211_CHAN_NO_HT;
152 }
153
154 if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, setup->channel,
155 setup->channel_type))
156 return -EINVAL;
157
158 err = cfg80211_can_use_chan(rdev, wdev, setup->channel,
159 CHAN_MODE_SHARED);
160 if (err)
161 return err;
162
163 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
164 if (!err) {
165 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
166 wdev->mesh_id_len = setup->mesh_id_len;
167 wdev->channel = setup->channel;
168 }
169
170 return err;
171}
172
173int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
174 struct net_device *dev,
175 struct mesh_setup *setup,
176 const struct mesh_config *conf)
177{
178 struct wireless_dev *wdev = dev->ieee80211_ptr;
179 int err;
180
181 mutex_lock(&rdev->devlist_mtx);
182 wdev_lock(wdev);
183 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
184 wdev_unlock(wdev);
185 mutex_unlock(&rdev->devlist_mtx);
186
187 return err;
188}
189
190int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
191 struct wireless_dev *wdev, int freq,
192 enum nl80211_channel_type channel_type)
193{
194 struct ieee80211_channel *channel;
195 int err;
196
197 channel = rdev_freq_to_chan(rdev, freq, channel_type);
198 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
199 channel,
200 channel_type)) {
201 return -EINVAL;
202 }
203
204
205
206
207
208
209
210
211 if (rdev->ops->libertas_set_mesh_channel) {
212 if (channel_type != NL80211_CHAN_NO_HT)
213 return -EINVAL;
214
215 if (!netif_running(wdev->netdev))
216 return -ENETDOWN;
217
218 err = cfg80211_can_use_chan(rdev, wdev, channel,
219 CHAN_MODE_SHARED);
220 if (err)
221 return err;
222
223 err = rdev->ops->libertas_set_mesh_channel(&rdev->wiphy,
224 wdev->netdev,
225 channel);
226 if (!err)
227 wdev->channel = channel;
228
229 return err;
230 }
231
232 if (wdev->mesh_id_len)
233 return -EBUSY;
234
235 wdev->preset_chan = channel;
236 wdev->preset_chantype = channel_type;
237 return 0;
238}
239
240void 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
245 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
246 return;
247
248 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
249 macaddr, ie, ie_len, gfp);
250}
251EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
252
253static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
254 struct net_device *dev)
255{
256 struct wireless_dev *wdev = dev->ieee80211_ptr;
257 int err;
258
259 ASSERT_WDEV_LOCK(wdev);
260
261 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
262 return -EOPNOTSUPP;
263
264 if (!rdev->ops->leave_mesh)
265 return -EOPNOTSUPP;
266
267 if (!wdev->mesh_id_len)
268 return -ENOTCONN;
269
270 err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
271 if (!err) {
272 wdev->mesh_id_len = 0;
273 wdev->channel = NULL;
274 }
275
276 return err;
277}
278
279int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
280 struct net_device *dev)
281{
282 struct wireless_dev *wdev = dev->ieee80211_ptr;
283 int err;
284
285 wdev_lock(wdev);
286 err = __cfg80211_leave_mesh(rdev, dev);
287 wdev_unlock(wdev);
288
289 return err;
290}
291
