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1#include <linux/ieee80211.h>
2#include <net/cfg80211.h>
3#include "nl80211.h"
4#include "core.h"
5
6/* Default values, timeouts in ms */
7#define MESH_TTL 31
8#define MESH_DEFAULT_ELEMENT_TTL 31
9#define MESH_MAX_RETR 3
10#define MESH_RET_T 100
11#define MESH_CONF_T 100
12#define MESH_HOLD_T 100
13
14#define MESH_PATH_TIMEOUT 5000
15
16/*
17 * Minimum interval between two consecutive PREQs originated by the same
18 * interface
19 */
20#define MESH_PREQ_MIN_INT 10
21#define MESH_DIAM_TRAVERSAL_TIME 50
22
23/*
24 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
25 * before timing out. This way it will remain ACTIVE and no data frames
26 * will be unnecessarily held in the pending queue.
27 */
28#define MESH_PATH_REFRESH_TIME 1000
29#define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
30
31/* Default maximum number of established plinks per interface */
32#define MESH_MAX_ESTAB_PLINKS 32
33
34#define MESH_MAX_PREQ_RETRIES 4
35
36
37const struct mesh_config default_mesh_config = {
38 .dot11MeshRetryTimeout = MESH_RET_T,
39 .dot11MeshConfirmTimeout = MESH_CONF_T,
40 .dot11MeshHoldingTimeout = MESH_HOLD_T,
41 .dot11MeshMaxRetries = MESH_MAX_RETR,
42 .dot11MeshTTL = MESH_TTL,
43 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
44 .auto_open_plinks = true,
45 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
46 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
47 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
48 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
49 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
50 .path_refresh_time = MESH_PATH_REFRESH_TIME,
51 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
52};
53
54const struct mesh_setup default_mesh_setup = {
55 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
56 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
57 .ie = NULL,
58 .ie_len = 0,
59 .is_secure = false,
60};
61
62int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
63 struct net_device *dev,
64 const struct mesh_setup *setup,
65 const struct mesh_config *conf)
66{
67 struct wireless_dev *wdev = dev->ieee80211_ptr;
68 int err;
69
70 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
71
72 ASSERT_WDEV_LOCK(wdev);
73
74 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
75 return -EOPNOTSUPP;
76
77 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
78 setup->is_secure)
79 return -EOPNOTSUPP;
80
81 if (wdev->mesh_id_len)
82 return -EALREADY;
83
84 if (!setup->mesh_id_len)
85 return -EINVAL;
86
87 if (!rdev->ops->join_mesh)
88 return -EOPNOTSUPP;
89
90 err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
91 if (!err) {
92 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
93 wdev->mesh_id_len = setup->mesh_id_len;
94 }
95
96 return err;
97}
98
99int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
100 struct net_device *dev,
101 const struct mesh_setup *setup,
102 const struct mesh_config *conf)
103{
104 struct wireless_dev *wdev = dev->ieee80211_ptr;
105 int err;
106
107 wdev_lock(wdev);
108 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
109 wdev_unlock(wdev);
110
111 return err;
112}
113
114void cfg80211_notify_new_peer_candidate(struct net_device *dev,
115 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
116{
117 struct wireless_dev *wdev = dev->ieee80211_ptr;
118
119 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
120 return;
121
122 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
123 macaddr, ie, ie_len, gfp);
124}
125EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
126
127static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
128 struct net_device *dev)
129{
130 struct wireless_dev *wdev = dev->ieee80211_ptr;
131 int err;
132
133 ASSERT_WDEV_LOCK(wdev);
134
135 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
136 return -EOPNOTSUPP;
137
138 if (!rdev->ops->leave_mesh)
139 return -EOPNOTSUPP;
140
141 if (!wdev->mesh_id_len)
142 return -ENOTCONN;
143
144 err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
145 if (!err)
146 wdev->mesh_id_len = 0;
147 return err;
148}
149
150int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
151 struct net_device *dev)
152{
153 struct wireless_dev *wdev = dev->ieee80211_ptr;
154 int err;
155
156 wdev_lock(wdev);
157 err = __cfg80211_leave_mesh(rdev, dev);
158 wdev_unlock(wdev);
159
160 return err;
161}
1#include <linux/ieee80211.h>
2#include <linux/export.h>
3#include <net/cfg80211.h>
4#include "nl80211.h"
5#include "core.h"
6#include "rdev-ops.h"
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
17#define MESH_RANN_INTERVAL 5000
18#define MESH_PATH_TO_ROOT_TIMEOUT 6000
19#define MESH_ROOT_INTERVAL 5000
20#define MESH_ROOT_CONFIRMATION_INTERVAL 2000
21#define MESH_DEFAULT_PLINK_TIMEOUT 1800 /* timeout in seconds */
22
23/*
24 * Minimum interval between two consecutive PREQs originated by the same
25 * interface
26 */
27#define MESH_PREQ_MIN_INT 10
28#define MESH_PERR_MIN_INT 100
29#define MESH_DIAM_TRAVERSAL_TIME 50
30
31#define MESH_RSSI_THRESHOLD 0
32
33/*
34 * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
35 * before timing out. This way it will remain ACTIVE and no data frames
36 * will be unnecessarily held in the pending queue.
37 */
38#define MESH_PATH_REFRESH_TIME 1000
39#define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
40
41/* Default maximum number of established plinks per interface */
42#define MESH_MAX_ESTAB_PLINKS 32
43
44#define MESH_MAX_PREQ_RETRIES 4
45
46#define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
47
48#define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units (=TUs) */
49#define MESH_DEFAULT_DTIM_PERIOD 2
50#define MESH_DEFAULT_AWAKE_WINDOW 10 /* in 1024 us units (=TUs) */
51
52const struct mesh_config default_mesh_config = {
53 .dot11MeshRetryTimeout = MESH_RET_T,
54 .dot11MeshConfirmTimeout = MESH_CONF_T,
55 .dot11MeshHoldingTimeout = MESH_HOLD_T,
56 .dot11MeshMaxRetries = MESH_MAX_RETR,
57 .dot11MeshTTL = MESH_TTL,
58 .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
59 .auto_open_plinks = true,
60 .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
61 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
62 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
63 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
64 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
65 .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
66 .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
67 .path_refresh_time = MESH_PATH_REFRESH_TIME,
68 .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
69 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
70 .dot11MeshGateAnnouncementProtocol = false,
71 .dot11MeshForwarding = true,
72 .rssi_threshold = MESH_RSSI_THRESHOLD,
73 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
74 .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
75 .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
76 .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
77 .power_mode = NL80211_MESH_POWER_ACTIVE,
78 .dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
79 .plink_timeout = MESH_DEFAULT_PLINK_TIMEOUT,
80};
81
82const struct mesh_setup default_mesh_setup = {
83 /* cfg80211_join_mesh() will pick a channel if needed */
84 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
85 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
86 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
87 .auth_id = 0, /* open */
88 .ie = NULL,
89 .ie_len = 0,
90 .is_secure = false,
91 .user_mpm = false,
92 .beacon_interval = MESH_DEFAULT_BEACON_INTERVAL,
93 .dtim_period = MESH_DEFAULT_DTIM_PERIOD,
94};
95
96int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
97 struct net_device *dev,
98 struct mesh_setup *setup,
99 const struct mesh_config *conf)
100{
101 struct wireless_dev *wdev = dev->ieee80211_ptr;
102 int err;
103
104 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
105
106 ASSERT_WDEV_LOCK(wdev);
107
108 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
109 return -EOPNOTSUPP;
110
111 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
112 setup->is_secure)
113 return -EOPNOTSUPP;
114
115 if (wdev->mesh_id_len)
116 return -EALREADY;
117
118 if (!setup->mesh_id_len)
119 return -EINVAL;
120
121 if (!rdev->ops->join_mesh)
122 return -EOPNOTSUPP;
123
124 if (!setup->chandef.chan) {
125 /* if no channel explicitly given, use preset channel */
126 setup->chandef = wdev->preset_chandef;
127 }
128
129 if (!setup->chandef.chan) {
130 /* if we don't have that either, use the first usable channel */
131 enum nl80211_band band;
132
133 for (band = 0; band < NUM_NL80211_BANDS; band++) {
134 struct ieee80211_supported_band *sband;
135 struct ieee80211_channel *chan;
136 int i;
137
138 sband = rdev->wiphy.bands[band];
139 if (!sband)
140 continue;
141
142 for (i = 0; i < sband->n_channels; i++) {
143 chan = &sband->channels[i];
144 if (chan->flags & (IEEE80211_CHAN_NO_IR |
145 IEEE80211_CHAN_DISABLED |
146 IEEE80211_CHAN_RADAR))
147 continue;
148 setup->chandef.chan = chan;
149 break;
150 }
151
152 if (setup->chandef.chan)
153 break;
154 }
155
156 /* no usable channel ... */
157 if (!setup->chandef.chan)
158 return -EINVAL;
159
160 setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
161 setup->chandef.center_freq1 = setup->chandef.chan->center_freq;
162 }
163
164 /*
165 * check if basic rates are available otherwise use mandatory rates as
166 * basic rates
167 */
168 if (!setup->basic_rates) {
169 enum nl80211_bss_scan_width scan_width;
170 struct ieee80211_supported_band *sband =
171 rdev->wiphy.bands[setup->chandef.chan->band];
172 scan_width = cfg80211_chandef_to_scan_width(&setup->chandef);
173 setup->basic_rates = ieee80211_mandatory_rates(sband,
174 scan_width);
175 }
176
177 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef,
178 NL80211_IFTYPE_MESH_POINT))
179 return -EINVAL;
180
181 err = rdev_join_mesh(rdev, dev, conf, setup);
182 if (!err) {
183 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
184 wdev->mesh_id_len = setup->mesh_id_len;
185 wdev->chandef = setup->chandef;
186 wdev->beacon_interval = setup->beacon_interval;
187 }
188
189 return err;
190}
191
192int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
193 struct net_device *dev,
194 struct mesh_setup *setup,
195 const struct mesh_config *conf)
196{
197 struct wireless_dev *wdev = dev->ieee80211_ptr;
198 int err;
199
200 wdev_lock(wdev);
201 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
202 wdev_unlock(wdev);
203
204 return err;
205}
206
207int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
208 struct wireless_dev *wdev,
209 struct cfg80211_chan_def *chandef)
210{
211 int err;
212
213 /*
214 * Workaround for libertas (only!), it puts the interface
215 * into mesh mode but doesn't implement join_mesh. Instead,
216 * it is configured via sysfs and then joins the mesh when
217 * you set the channel. Note that the libertas mesh isn't
218 * compatible with 802.11 mesh.
219 */
220 if (rdev->ops->libertas_set_mesh_channel) {
221 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
222 return -EINVAL;
223
224 if (!netif_running(wdev->netdev))
225 return -ENETDOWN;
226
227 err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev,
228 chandef->chan);
229 if (!err)
230 wdev->chandef = *chandef;
231
232 return err;
233 }
234
235 if (wdev->mesh_id_len)
236 return -EBUSY;
237
238 wdev->preset_chandef = *chandef;
239 return 0;
240}
241
242int __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
259 err = rdev_leave_mesh(rdev, dev);
260 if (!err) {
261 wdev->mesh_id_len = 0;
262 wdev->beacon_interval = 0;
263 memset(&wdev->chandef, 0, sizeof(wdev->chandef));
264 rdev_set_qos_map(rdev, dev, NULL);
265 }
266
267 return err;
268}
269
270int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
271 struct net_device *dev)
272{
273 struct wireless_dev *wdev = dev->ieee80211_ptr;
274 int err;
275
276 wdev_lock(wdev);
277 err = __cfg80211_leave_mesh(rdev, dev);
278 wdev_unlock(wdev);
279
280 return err;
281}