1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* <<
3 * Portions <<
4 * Copyright (C) 2022-2024 Intel Corporation <<
5 */ <<
6 #include <linux/ieee80211.h> 2 #include <linux/ieee80211.h>
7 #include <linux/export.h> 3 #include <linux/export.h>
8 #include <net/cfg80211.h> 4 #include <net/cfg80211.h>
9 #include "nl80211.h" 5 #include "nl80211.h"
10 #include "core.h" 6 #include "core.h"
11 #include "rdev-ops.h" 7 #include "rdev-ops.h"
12 8
13 /* Default values, timeouts in ms */ 9 /* Default values, timeouts in ms */
14 #define MESH_TTL 31 10 #define MESH_TTL 31
15 #define MESH_DEFAULT_ELEMENT_TTL 31 11 #define MESH_DEFAULT_ELEMENT_TTL 31
16 #define MESH_MAX_RETR 3 12 #define MESH_MAX_RETR 3
17 #define MESH_RET_T 100 13 #define MESH_RET_T 100
18 #define MESH_CONF_T 100 14 #define MESH_CONF_T 100
19 #define MESH_HOLD_T 100 15 #define MESH_HOLD_T 100
20 16
21 #define MESH_PATH_TIMEOUT 5000 17 #define MESH_PATH_TIMEOUT 5000
22 #define MESH_RANN_INTERVAL 5000 18 #define MESH_RANN_INTERVAL 5000
23 #define MESH_PATH_TO_ROOT_TIMEOUT 6000 19 #define MESH_PATH_TO_ROOT_TIMEOUT 6000
24 #define MESH_ROOT_INTERVAL 5000 20 #define MESH_ROOT_INTERVAL 5000
25 #define MESH_ROOT_CONFIRMATION_INTERVAL 2000 21 #define MESH_ROOT_CONFIRMATION_INTERVAL 2000
26 #define MESH_DEFAULT_PLINK_TIMEOUT 1800 / 22 #define MESH_DEFAULT_PLINK_TIMEOUT 1800 /* timeout in seconds */
27 23
28 /* 24 /*
29 * Minimum interval between two consecutive PR 25 * Minimum interval between two consecutive PREQs originated by the same
30 * interface 26 * interface
31 */ 27 */
32 #define MESH_PREQ_MIN_INT 10 28 #define MESH_PREQ_MIN_INT 10
33 #define MESH_PERR_MIN_INT 100 29 #define MESH_PERR_MIN_INT 100
34 #define MESH_DIAM_TRAVERSAL_TIME 50 30 #define MESH_DIAM_TRAVERSAL_TIME 50
35 31
36 #define MESH_RSSI_THRESHOLD 0 32 #define MESH_RSSI_THRESHOLD 0
37 33
38 /* 34 /*
39 * A path will be refreshed if it is used PATH 35 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
40 * before timing out. This way it will remain 36 * before timing out. This way it will remain ACTIVE and no data frames
41 * will be unnecessarily held in the pending q 37 * will be unnecessarily held in the pending queue.
42 */ 38 */
43 #define MESH_PATH_REFRESH_TIME 39 #define MESH_PATH_REFRESH_TIME 1000
44 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_D 40 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
45 41
46 /* Default maximum number of established plink 42 /* Default maximum number of established plinks per interface */
47 #define MESH_MAX_ESTAB_PLINKS 32 43 #define MESH_MAX_ESTAB_PLINKS 32
48 44
49 #define MESH_MAX_PREQ_RETRIES 4 45 #define MESH_MAX_PREQ_RETRIES 4
50 46
51 #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50 47 #define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
52 48
53 #define MESH_DEFAULT_BEACON_INTERVAL 1000 49 #define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units (=TUs) */
54 #define MESH_DEFAULT_DTIM_PERIOD 2 50 #define MESH_DEFAULT_DTIM_PERIOD 2
55 #define MESH_DEFAULT_AWAKE_WINDOW 10 51 #define MESH_DEFAULT_AWAKE_WINDOW 10 /* in 1024 us units (=TUs) */
56 52
57 const struct mesh_config default_mesh_config = 53 const struct mesh_config default_mesh_config = {
58 .dot11MeshRetryTimeout = MESH_RET_T, 54 .dot11MeshRetryTimeout = MESH_RET_T,
59 .dot11MeshConfirmTimeout = MESH_CONF_T 55 .dot11MeshConfirmTimeout = MESH_CONF_T,
60 .dot11MeshHoldingTimeout = MESH_HOLD_T 56 .dot11MeshHoldingTimeout = MESH_HOLD_T,
61 .dot11MeshMaxRetries = MESH_MAX_RETR, 57 .dot11MeshMaxRetries = MESH_MAX_RETR,
62 .dot11MeshTTL = MESH_TTL, 58 .dot11MeshTTL = MESH_TTL,
63 .element_ttl = MESH_DEFAULT_ELEMENT_TT 59 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
64 .auto_open_plinks = true, 60 .auto_open_plinks = true,
65 .dot11MeshMaxPeerLinks = MESH_MAX_ESTA 61 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
66 .dot11MeshNbrOffsetMaxNeighbor = MESH_ 62 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
67 .dot11MeshHWMPactivePathTimeout = MESH 63 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
68 .dot11MeshHWMPpreqMinInterval = MESH_P 64 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
69 .dot11MeshHWMPperrMinInterval = MESH_P 65 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
70 .dot11MeshHWMPnetDiameterTraversalTime 66 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
71 .dot11MeshHWMPmaxPREQretries = MESH_MA 67 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
72 .path_refresh_time = MESH_PATH_REFRESH 68 .path_refresh_time = MESH_PATH_REFRESH_TIME,
73 .min_discovery_timeout = MESH_MIN_DISC 69 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
74 .dot11MeshHWMPRannInterval = MESH_RANN 70 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
75 .dot11MeshGateAnnouncementProtocol = f 71 .dot11MeshGateAnnouncementProtocol = false,
76 .dot11MeshForwarding = true, 72 .dot11MeshForwarding = true,
77 .rssi_threshold = MESH_RSSI_THRESHOLD, 73 .rssi_threshold = MESH_RSSI_THRESHOLD,
78 .ht_opmode = IEEE80211_HT_OP_MODE_PROT 74 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
79 .dot11MeshHWMPactivePathToRootTimeout 75 .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
80 .dot11MeshHWMProotInterval = MESH_ROOT 76 .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
81 .dot11MeshHWMPconfirmationInterval = M 77 .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
82 .power_mode = NL80211_MESH_POWER_ACTIV 78 .power_mode = NL80211_MESH_POWER_ACTIVE,
83 .dot11MeshAwakeWindowDuration = MESH_D 79 .dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
84 .plink_timeout = MESH_DEFAULT_PLINK_TI 80 .plink_timeout = MESH_DEFAULT_PLINK_TIMEOUT,
85 .dot11MeshNolearn = false, <<
86 }; 81 };
87 82
88 const struct mesh_setup default_mesh_setup = { 83 const struct mesh_setup default_mesh_setup = {
89 /* cfg80211_join_mesh() will pick a ch 84 /* cfg80211_join_mesh() will pick a channel if needed */
90 .sync_method = IEEE80211_SYNC_METHOD_N 85 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
91 .path_sel_proto = IEEE80211_PATH_PROTO 86 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
92 .path_metric = IEEE80211_PATH_METRIC_A 87 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
93 .auth_id = 0, /* open */ 88 .auth_id = 0, /* open */
94 .ie = NULL, 89 .ie = NULL,
95 .ie_len = 0, 90 .ie_len = 0,
96 .is_secure = false, 91 .is_secure = false,
97 .user_mpm = false, 92 .user_mpm = false,
98 .beacon_interval = MESH_DEFAULT_BEACON 93 .beacon_interval = MESH_DEFAULT_BEACON_INTERVAL,
99 .dtim_period = MESH_DEFAULT_DTIM_PERIO 94 .dtim_period = MESH_DEFAULT_DTIM_PERIOD,
100 }; 95 };
101 96
102 int __cfg80211_join_mesh(struct cfg80211_regis 97 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
103 struct net_device *de 98 struct net_device *dev,
104 struct mesh_setup *se 99 struct mesh_setup *setup,
105 const struct mesh_con 100 const struct mesh_config *conf)
106 { 101 {
107 struct wireless_dev *wdev = dev->ieee8 102 struct wireless_dev *wdev = dev->ieee80211_ptr;
108 int err; 103 int err;
109 104
110 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != 105 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
111 106
112 lockdep_assert_wiphy(wdev->wiphy); !! 107 ASSERT_WDEV_LOCK(wdev);
113 108
114 if (dev->ieee80211_ptr->iftype != NL80 109 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
115 return -EOPNOTSUPP; 110 return -EOPNOTSUPP;
116 111
117 if (!(rdev->wiphy.flags & WIPHY_FLAG_M 112 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
118 setup->is_secure) 113 setup->is_secure)
119 return -EOPNOTSUPP; 114 return -EOPNOTSUPP;
120 115
121 if (wdev->u.mesh.id_len) !! 116 if (wdev->mesh_id_len)
122 return -EALREADY; 117 return -EALREADY;
123 118
124 if (!setup->mesh_id_len) 119 if (!setup->mesh_id_len)
125 return -EINVAL; 120 return -EINVAL;
126 121
127 if (!rdev->ops->join_mesh) 122 if (!rdev->ops->join_mesh)
128 return -EOPNOTSUPP; 123 return -EOPNOTSUPP;
129 124
130 if (wdev->links[0].cac_started) <<
131 return -EBUSY; <<
132 <<
133 if (!setup->chandef.chan) { 125 if (!setup->chandef.chan) {
134 /* if no channel explicitly gi 126 /* if no channel explicitly given, use preset channel */
135 setup->chandef = wdev->u.mesh. !! 127 setup->chandef = wdev->preset_chandef;
136 } 128 }
137 129
138 if (!setup->chandef.chan) { 130 if (!setup->chandef.chan) {
139 /* if we don't have that eithe 131 /* if we don't have that either, use the first usable channel */
140 enum nl80211_band band; 132 enum nl80211_band band;
141 133
142 for (band = 0; band < NUM_NL80 134 for (band = 0; band < NUM_NL80211_BANDS; band++) {
143 struct ieee80211_suppo 135 struct ieee80211_supported_band *sband;
144 struct ieee80211_chann 136 struct ieee80211_channel *chan;
145 int i; 137 int i;
146 138
147 sband = rdev->wiphy.ba 139 sband = rdev->wiphy.bands[band];
148 if (!sband) 140 if (!sband)
149 continue; 141 continue;
150 142
151 for (i = 0; i < sband- 143 for (i = 0; i < sband->n_channels; i++) {
152 chan = &sband- 144 chan = &sband->channels[i];
153 if (chan->flag 145 if (chan->flags & (IEEE80211_CHAN_NO_IR |
154 146 IEEE80211_CHAN_DISABLED |
155 147 IEEE80211_CHAN_RADAR))
156 contin 148 continue;
157 setup->chandef 149 setup->chandef.chan = chan;
158 break; 150 break;
159 } 151 }
160 152
161 if (setup->chandef.cha 153 if (setup->chandef.chan)
162 break; 154 break;
163 } 155 }
164 156
165 /* no usable channel ... */ 157 /* no usable channel ... */
166 if (!setup->chandef.chan) 158 if (!setup->chandef.chan)
167 return -EINVAL; 159 return -EINVAL;
168 160
169 setup->chandef.width = NL80211 161 setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
170 setup->chandef.center_freq1 = 162 setup->chandef.center_freq1 = setup->chandef.chan->center_freq;
171 } 163 }
172 164
173 /* 165 /*
174 * check if basic rates are available 166 * check if basic rates are available otherwise use mandatory rates as
175 * basic rates 167 * basic rates
176 */ 168 */
177 if (!setup->basic_rates) { 169 if (!setup->basic_rates) {
>> 170 enum nl80211_bss_scan_width scan_width;
178 struct ieee80211_supported_ban 171 struct ieee80211_supported_band *sband =
179 rdev->wiphy.ba 172 rdev->wiphy.bands[setup->chandef.chan->band];
180 173
181 if (setup->chandef.chan->band 174 if (setup->chandef.chan->band == NL80211_BAND_2GHZ) {
182 int i; 175 int i;
183 176
184 /* 177 /*
185 * Older versions sele 178 * Older versions selected the mandatory rates for
186 * 2.4 GHz as well, bu 179 * 2.4 GHz as well, but were broken in that only
187 * 1 Mbps was regarded 180 * 1 Mbps was regarded as a mandatory rate. Keep
188 * using just 1 Mbps a 181 * using just 1 Mbps as the default basic rate for
189 * mesh to be interope 182 * mesh to be interoperable with older versions.
190 */ 183 */
191 for (i = 0; i < sband- 184 for (i = 0; i < sband->n_bitrates; i++) {
192 if (sband->bit 185 if (sband->bitrates[i].bitrate == 10) {
193 setup- 186 setup->basic_rates = BIT(i);
194 break; 187 break;
195 } 188 }
196 } 189 }
197 } else { 190 } else {
198 setup->basic_rates = i !! 191 scan_width = cfg80211_chandef_to_scan_width(&setup->chandef);
>> 192 setup->basic_rates = ieee80211_mandatory_rates(sband,
>> 193 scan_width);
199 } 194 }
200 } 195 }
201 196
202 err = cfg80211_chandef_dfs_required(&r 197 err = cfg80211_chandef_dfs_required(&rdev->wiphy,
203 &s 198 &setup->chandef,
204 NL 199 NL80211_IFTYPE_MESH_POINT);
205 if (err < 0) 200 if (err < 0)
206 return err; 201 return err;
207 if (err > 0 && !setup->userspace_handl 202 if (err > 0 && !setup->userspace_handles_dfs)
208 return -EINVAL; 203 return -EINVAL;
209 204
210 if (!cfg80211_reg_can_beacon(&rdev->wi 205 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef,
211 NL80211_I 206 NL80211_IFTYPE_MESH_POINT))
212 return -EINVAL; 207 return -EINVAL;
213 208
214 err = rdev_join_mesh(rdev, dev, conf, 209 err = rdev_join_mesh(rdev, dev, conf, setup);
215 if (!err) { 210 if (!err) {
216 memcpy(wdev->u.mesh.id, setup- !! 211 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
217 wdev->u.mesh.id_len = setup->m !! 212 wdev->mesh_id_len = setup->mesh_id_len;
218 wdev->u.mesh.chandef = setup-> !! 213 wdev->chandef = setup->chandef;
219 wdev->u.mesh.beacon_interval = !! 214 wdev->beacon_interval = setup->beacon_interval;
220 } 215 }
221 216
222 return err; 217 return err;
223 } 218 }
224 219
225 int cfg80211_set_mesh_channel(struct cfg80211_ 220 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
226 struct wireless_ 221 struct wireless_dev *wdev,
227 struct cfg80211_ 222 struct cfg80211_chan_def *chandef)
228 { 223 {
229 int err; 224 int err;
230 225
231 /* 226 /*
232 * Workaround for libertas (only!), it 227 * Workaround for libertas (only!), it puts the interface
233 * into mesh mode but doesn't implemen 228 * into mesh mode but doesn't implement join_mesh. Instead,
234 * it is configured via sysfs and then 229 * it is configured via sysfs and then joins the mesh when
235 * you set the channel. Note that the 230 * you set the channel. Note that the libertas mesh isn't
236 * compatible with 802.11 mesh. 231 * compatible with 802.11 mesh.
237 */ 232 */
238 if (rdev->ops->libertas_set_mesh_chann 233 if (rdev->ops->libertas_set_mesh_channel) {
239 if (chandef->width != NL80211_ 234 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
240 return -EINVAL; 235 return -EINVAL;
241 236
242 if (!netif_running(wdev->netde 237 if (!netif_running(wdev->netdev))
243 return -ENETDOWN; 238 return -ENETDOWN;
244 239
245 err = rdev_libertas_set_mesh_c 240 err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev,
246 241 chandef->chan);
247 if (!err) 242 if (!err)
248 wdev->u.mesh.chandef = !! 243 wdev->chandef = *chandef;
249 244
250 return err; 245 return err;
251 } 246 }
252 247
253 if (wdev->u.mesh.id_len) !! 248 if (wdev->mesh_id_len)
254 return -EBUSY; 249 return -EBUSY;
255 250
256 wdev->u.mesh.preset_chandef = *chandef !! 251 wdev->preset_chandef = *chandef;
257 return 0; 252 return 0;
258 } 253 }
259 254
260 int cfg80211_leave_mesh(struct cfg80211_regist !! 255 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
261 struct net_device *dev !! 256 struct net_device *dev)
262 { 257 {
263 struct wireless_dev *wdev = dev->ieee8 258 struct wireless_dev *wdev = dev->ieee80211_ptr;
264 int err; 259 int err;
265 260
266 lockdep_assert_wiphy(wdev->wiphy); !! 261 ASSERT_WDEV_LOCK(wdev);
267 262
268 if (dev->ieee80211_ptr->iftype != NL80 263 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
269 return -EOPNOTSUPP; 264 return -EOPNOTSUPP;
270 265
271 if (!rdev->ops->leave_mesh) 266 if (!rdev->ops->leave_mesh)
272 return -EOPNOTSUPP; 267 return -EOPNOTSUPP;
273 268
274 if (!wdev->u.mesh.id_len) !! 269 if (!wdev->mesh_id_len)
275 return -ENOTCONN; 270 return -ENOTCONN;
276 271
277 err = rdev_leave_mesh(rdev, dev); 272 err = rdev_leave_mesh(rdev, dev);
278 if (!err) { 273 if (!err) {
279 wdev->conn_owner_nlportid = 0; 274 wdev->conn_owner_nlportid = 0;
280 wdev->u.mesh.id_len = 0; !! 275 wdev->mesh_id_len = 0;
281 wdev->u.mesh.beacon_interval = !! 276 wdev->beacon_interval = 0;
282 memset(&wdev->u.mesh.chandef, !! 277 memset(&wdev->chandef, 0, sizeof(wdev->chandef));
283 sizeof(wdev->u.mesh.cha <<
284 rdev_set_qos_map(rdev, dev, NU 278 rdev_set_qos_map(rdev, dev, NULL);
285 cfg80211_sched_dfs_chan_update 279 cfg80211_sched_dfs_chan_update(rdev);
286 } 280 }
>> 281
>> 282 return err;
>> 283 }
>> 284
>> 285 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
>> 286 struct net_device *dev)
>> 287 {
>> 288 struct wireless_dev *wdev = dev->ieee80211_ptr;
>> 289 int err;
>> 290
>> 291 wdev_lock(wdev);
>> 292 err = __cfg80211_leave_mesh(rdev, dev);
>> 293 wdev_unlock(wdev);
287 294
288 return err; 295 return err;
289 } 296 }
290 297
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