blob: 55957a284f6c7e82c9b403dae01798316224ad49 [file] [log] [blame]
Johannes Berg29cbe682010-12-03 09:20:44 +01001#include <linux/ieee80211.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -04002#include <linux/export.h>
Johannes Berg29cbe682010-12-03 09:20:44 +01003#include <net/cfg80211.h>
Javier Cardonac93b5e72011-04-07 15:08:34 -07004#include "nl80211.h"
Johannes Berg29cbe682010-12-03 09:20:44 +01005#include "core.h"
Hila Gonene35e4d22012-06-27 17:19:42 +03006#include "rdev-ops.h"
Johannes Berg29cbe682010-12-03 09:20:44 +01007
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
Javier Cardona0507e152011-08-09 16:45:10 -070017#define MESH_RANN_INTERVAL 5000
Chun-Yeow Yeohac1073a2012-06-14 02:06:06 +080018#define MESH_PATH_TO_ROOT_TIMEOUT 6000
19#define MESH_ROOT_INTERVAL 5000
Chun-Yeow Yeoh728b19e2012-06-14 02:06:10 +080020#define MESH_ROOT_CONFIRMATION_INTERVAL 2000
Johannes Berg29cbe682010-12-03 09:20:44 +010021
22/*
23 * Minimum interval between two consecutive PREQs originated by the same
24 * interface
25 */
26#define MESH_PREQ_MIN_INT 10
Thomas Pedersendca7e942011-11-24 17:15:24 -080027#define MESH_PERR_MIN_INT 100
Johannes Berg29cbe682010-12-03 09:20:44 +010028#define MESH_DIAM_TRAVERSAL_TIME 50
29
Ashok Nagarajan55335132012-02-28 17:04:08 -080030#define MESH_RSSI_THRESHOLD 0
31
Johannes Berg29cbe682010-12-03 09:20:44 +010032/*
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
Javier Cardonad299a1f2012-03-31 11:31:33 -070045#define MESH_SYNC_NEIGHBOR_OFFSET_MAX 50
Johannes Berg29cbe682010-12-03 09:20:44 +010046
Marco Porsch9bdbf042013-01-07 16:04:51 +010047#define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units (=TUs) */
48#define MESH_DEFAULT_DTIM_PERIOD 2
Marco Porsch3b1c5a52013-01-07 16:04:52 +010049#define MESH_DEFAULT_AWAKE_WINDOW 10 /* in 1024 us units (=TUs) */
Marco Porsch9bdbf042013-01-07 16:04:51 +010050
Johannes Berg29cbe682010-12-03 09:20:44 +010051const 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,
Javier Cardonad299a1f2012-03-31 11:31:33 -070060 .dot11MeshNbrOffsetMaxNeighbor = MESH_SYNC_NEIGHBOR_OFFSET_MAX,
Johannes Berg29cbe682010-12-03 09:20:44 +010061 .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
62 .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
Thomas Pedersendca7e942011-11-24 17:15:24 -080063 .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT,
Johannes Berg29cbe682010-12-03 09:20:44 +010064 .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,
Javier Cardona0507e152011-08-09 16:45:10 -070068 .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL,
Javier Cardona16dd7262011-08-09 16:45:11 -070069 .dot11MeshGateAnnouncementProtocol = false,
Chun-Yeow Yeoh94f90652012-01-21 01:02:16 +080070 .dot11MeshForwarding = true,
Ashok Nagarajan55335132012-02-28 17:04:08 -080071 .rssi_threshold = MESH_RSSI_THRESHOLD,
Ashok Nagarajan70c33ea2012-04-30 14:20:32 -070072 .ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED,
Chun-Yeow Yeohac1073a2012-06-14 02:06:06 +080073 .dot11MeshHWMPactivePathToRootTimeout = MESH_PATH_TO_ROOT_TIMEOUT,
74 .dot11MeshHWMProotInterval = MESH_ROOT_INTERVAL,
Chun-Yeow Yeoh728b19e2012-06-14 02:06:10 +080075 .dot11MeshHWMPconfirmationInterval = MESH_ROOT_CONFIRMATION_INTERVAL,
Marco Porsch3b1c5a52013-01-07 16:04:52 +010076 .power_mode = NL80211_MESH_POWER_ACTIVE,
77 .dot11MeshAwakeWindowDuration = MESH_DEFAULT_AWAKE_WINDOW,
Johannes Berg29cbe682010-12-03 09:20:44 +010078};
79
Javier Cardonac80d5452010-12-16 17:37:49 -080080const struct mesh_setup default_mesh_setup = {
Johannes Bergcc1d2802012-05-16 23:50:20 +020081 /* cfg80211_join_mesh() will pick a channel if needed */
Javier Cardonad299a1f2012-03-31 11:31:33 -070082 .sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
Javier Cardonac80d5452010-12-16 17:37:49 -080083 .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
84 .path_metric = IEEE80211_PATH_METRIC_AIRTIME,
Javier Cardona581a8b02011-04-07 15:08:27 -070085 .ie = NULL,
86 .ie_len = 0,
Javier Cardona5cff5e02011-04-07 15:08:29 -070087 .is_secure = false,
Marco Porsch9bdbf042013-01-07 16:04:51 +010088 .beacon_interval = MESH_DEFAULT_BEACON_INTERVAL,
89 .dtim_period = MESH_DEFAULT_DTIM_PERIOD,
Javier Cardonac80d5452010-12-16 17:37:49 -080090};
Johannes Berg29cbe682010-12-03 09:20:44 +010091
92int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
93 struct net_device *dev,
Johannes Bergcc1d2802012-05-16 23:50:20 +020094 struct mesh_setup *setup,
Johannes Berg29cbe682010-12-03 09:20:44 +010095 const struct mesh_config *conf)
96{
97 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg29cbe682010-12-03 09:20:44 +010098 int err;
99
100 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
101
102 ASSERT_WDEV_LOCK(wdev);
103
104 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
105 return -EOPNOTSUPP;
106
Javier Cardona15d5dda2011-04-07 15:08:28 -0700107 if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
108 setup->is_secure)
109 return -EOPNOTSUPP;
110
Johannes Berg29cbe682010-12-03 09:20:44 +0100111 if (wdev->mesh_id_len)
112 return -EALREADY;
113
Javier Cardonac80d5452010-12-16 17:37:49 -0800114 if (!setup->mesh_id_len)
Johannes Berg29cbe682010-12-03 09:20:44 +0100115 return -EINVAL;
116
117 if (!rdev->ops->join_mesh)
118 return -EOPNOTSUPP;
119
Johannes Berg683b6d32012-11-08 21:25:48 +0100120 if (!setup->chandef.chan) {
Johannes Bergcc1d2802012-05-16 23:50:20 +0200121 /* if no channel explicitly given, use preset channel */
Johannes Berg683b6d32012-11-08 21:25:48 +0100122 setup->chandef = wdev->preset_chandef;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200123 }
124
Johannes Berg683b6d32012-11-08 21:25:48 +0100125 if (!setup->chandef.chan) {
Johannes Bergcc1d2802012-05-16 23:50:20 +0200126 /* if we don't have that either, use the first usable channel */
127 enum ieee80211_band band;
128
129 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
130 struct ieee80211_supported_band *sband;
131 struct ieee80211_channel *chan;
132 int i;
133
134 sband = rdev->wiphy.bands[band];
135 if (!sband)
136 continue;
137
138 for (i = 0; i < sband->n_channels; i++) {
139 chan = &sband->channels[i];
140 if (chan->flags & (IEEE80211_CHAN_NO_IBSS |
141 IEEE80211_CHAN_PASSIVE_SCAN |
142 IEEE80211_CHAN_DISABLED |
143 IEEE80211_CHAN_RADAR))
144 continue;
Johannes Berg683b6d32012-11-08 21:25:48 +0100145 setup->chandef.chan = chan;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200146 break;
147 }
148
Johannes Berg683b6d32012-11-08 21:25:48 +0100149 if (setup->chandef.chan)
Johannes Bergcc1d2802012-05-16 23:50:20 +0200150 break;
151 }
152
153 /* no usable channel ... */
Johannes Berg683b6d32012-11-08 21:25:48 +0100154 if (!setup->chandef.chan)
Johannes Bergcc1d2802012-05-16 23:50:20 +0200155 return -EINVAL;
156
Marco Porschda29d2a2012-12-03 11:23:37 +0100157 setup->chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
158 setup->chandef.center_freq1 = setup->chandef.chan->center_freq;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200159 }
160
Johannes Berg683b6d32012-11-08 21:25:48 +0100161 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef))
Johannes Bergcc1d2802012-05-16 23:50:20 +0200162 return -EINVAL;
163
Johannes Berg683b6d32012-11-08 21:25:48 +0100164 err = cfg80211_can_use_chan(rdev, wdev, setup->chandef.chan,
Michal Kaziore4e32452012-06-29 12:47:08 +0200165 CHAN_MODE_SHARED);
166 if (err)
167 return err;
168
Hila Gonene35e4d22012-06-27 17:19:42 +0300169 err = rdev_join_mesh(rdev, dev, conf, setup);
Johannes Berg29cbe682010-12-03 09:20:44 +0100170 if (!err) {
Javier Cardonac80d5452010-12-16 17:37:49 -0800171 memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
172 wdev->mesh_id_len = setup->mesh_id_len;
Johannes Berg683b6d32012-11-08 21:25:48 +0100173 wdev->channel = setup->chandef.chan;
Johannes Berg29cbe682010-12-03 09:20:44 +0100174 }
175
176 return err;
177}
178
179int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
180 struct net_device *dev,
Johannes Bergcc1d2802012-05-16 23:50:20 +0200181 struct mesh_setup *setup,
Johannes Berg29cbe682010-12-03 09:20:44 +0100182 const struct mesh_config *conf)
183{
184 struct wireless_dev *wdev = dev->ieee80211_ptr;
185 int err;
186
Michal Kaziore4e32452012-06-29 12:47:08 +0200187 mutex_lock(&rdev->devlist_mtx);
Johannes Berg29cbe682010-12-03 09:20:44 +0100188 wdev_lock(wdev);
Javier Cardonac80d5452010-12-16 17:37:49 -0800189 err = __cfg80211_join_mesh(rdev, dev, setup, conf);
Johannes Berg29cbe682010-12-03 09:20:44 +0100190 wdev_unlock(wdev);
Michal Kaziore4e32452012-06-29 12:47:08 +0200191 mutex_unlock(&rdev->devlist_mtx);
Johannes Berg29cbe682010-12-03 09:20:44 +0100192
193 return err;
194}
195
Johannes Berg683b6d32012-11-08 21:25:48 +0100196int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
197 struct wireless_dev *wdev,
198 struct cfg80211_chan_def *chandef)
Johannes Bergcc1d2802012-05-16 23:50:20 +0200199{
Michal Kaziorf4489eb2012-06-29 12:46:58 +0200200 int err;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200201
202 /*
203 * Workaround for libertas (only!), it puts the interface
204 * into mesh mode but doesn't implement join_mesh. Instead,
205 * it is configured via sysfs and then joins the mesh when
206 * you set the channel. Note that the libertas mesh isn't
207 * compatible with 802.11 mesh.
208 */
Johannes Berge8c9bd52012-06-06 08:18:22 +0200209 if (rdev->ops->libertas_set_mesh_channel) {
Johannes Berg3d9d1d62012-11-08 23:14:50 +0100210 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
Johannes Berge8c9bd52012-06-06 08:18:22 +0200211 return -EINVAL;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200212
213 if (!netif_running(wdev->netdev))
214 return -ENETDOWN;
Michal Kaziorf4489eb2012-06-29 12:46:58 +0200215
Johannes Berg683b6d32012-11-08 21:25:48 +0100216 err = cfg80211_can_use_chan(rdev, wdev, chandef->chan,
Michal Kaziore4e32452012-06-29 12:47:08 +0200217 CHAN_MODE_SHARED);
218 if (err)
219 return err;
220
Hila Gonene35e4d22012-06-27 17:19:42 +0300221 err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev,
Johannes Berg683b6d32012-11-08 21:25:48 +0100222 chandef->chan);
Michal Kaziorf4489eb2012-06-29 12:46:58 +0200223 if (!err)
Johannes Berg683b6d32012-11-08 21:25:48 +0100224 wdev->channel = chandef->chan;
Michal Kaziorf4489eb2012-06-29 12:46:58 +0200225
226 return err;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200227 }
228
229 if (wdev->mesh_id_len)
230 return -EBUSY;
231
Johannes Berg683b6d32012-11-08 21:25:48 +0100232 wdev->preset_chandef = *chandef;
Johannes Bergcc1d2802012-05-16 23:50:20 +0200233 return 0;
234}
235
Javier Cardonac93b5e72011-04-07 15:08:34 -0700236void cfg80211_notify_new_peer_candidate(struct net_device *dev,
237 const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
238{
239 struct wireless_dev *wdev = dev->ieee80211_ptr;
240
Beni Lev4ee3e062012-08-27 12:49:39 +0300241 trace_cfg80211_notify_new_peer_candidate(dev, macaddr);
Javier Cardonac93b5e72011-04-07 15:08:34 -0700242 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
243 return;
244
245 nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev,
246 macaddr, ie, ie_len, gfp);
247}
248EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
249
Johannes Berg29cbe682010-12-03 09:20:44 +0100250static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
251 struct net_device *dev)
252{
253 struct wireless_dev *wdev = dev->ieee80211_ptr;
254 int err;
255
256 ASSERT_WDEV_LOCK(wdev);
257
258 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
259 return -EOPNOTSUPP;
260
261 if (!rdev->ops->leave_mesh)
262 return -EOPNOTSUPP;
263
264 if (!wdev->mesh_id_len)
265 return -ENOTCONN;
266
Hila Gonene35e4d22012-06-27 17:19:42 +0300267 err = rdev_leave_mesh(rdev, dev);
Michal Kaziorf4489eb2012-06-29 12:46:58 +0200268 if (!err) {
Johannes Berg29cbe682010-12-03 09:20:44 +0100269 wdev->mesh_id_len = 0;
Michal Kaziorf4489eb2012-06-29 12:46:58 +0200270 wdev->channel = NULL;
271 }
272
Johannes Berg29cbe682010-12-03 09:20:44 +0100273 return err;
274}
275
276int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
277 struct net_device *dev)
278{
279 struct wireless_dev *wdev = dev->ieee80211_ptr;
280 int err;
281
282 wdev_lock(wdev);
283 err = __cfg80211_leave_mesh(rdev, dev);
284 wdev_unlock(wdev);
285
286 return err;
287}