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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 | /* Default values, timeouts in ms */ |
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 | |
18 | /* |
19 | * Minimum interval between two consecutive PREQs originated by the same |
20 | * interface |
21 | */ |
22 | #define MESH_PREQ_MIN_INT 10 |
23 | #define MESH_PERR_MIN_INT 100 |
24 | #define MESH_DIAM_TRAVERSAL_TIME 50 |
25 | |
26 | #define MESH_RSSI_THRESHOLD 0 |
27 | |
28 | /* |
29 | * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds |
30 | * before timing out. This way it will remain ACTIVE and no data frames |
31 | * will be unnecessarily held in the pending queue. |
32 | */ |
33 | #define MESH_PATH_REFRESH_TIME 1000 |
34 | #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME) |
35 | |
36 | /* Default maximum number of established plinks per interface */ |
37 | #define MESH_MAX_ESTAB_PLINKS 32 |
38 | |
39 | #define MESH_MAX_PREQ_RETRIES 4 |
40 | |
41 | |
42 | const struct mesh_config default_mesh_config = { |
43 | .dot11MeshRetryTimeout = MESH_RET_T, |
44 | .dot11MeshConfirmTimeout = MESH_CONF_T, |
45 | .dot11MeshHoldingTimeout = MESH_HOLD_T, |
46 | .dot11MeshMaxRetries = MESH_MAX_RETR, |
47 | .dot11MeshTTL = MESH_TTL, |
48 | .element_ttl = MESH_DEFAULT_ELEMENT_TTL, |
49 | .auto_open_plinks = true, |
50 | .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS, |
51 | .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT, |
52 | .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT, |
53 | .dot11MeshHWMPperrMinInterval = MESH_PERR_MIN_INT, |
54 | .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME, |
55 | .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES, |
56 | .path_refresh_time = MESH_PATH_REFRESH_TIME, |
57 | .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT, |
58 | .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL, |
59 | .dot11MeshGateAnnouncementProtocol = false, |
60 | .dot11MeshForwarding = true, |
61 | .rssi_threshold = MESH_RSSI_THRESHOLD, |
62 | }; |
63 | |
64 | const struct mesh_setup default_mesh_setup = { |
65 | .path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP, |
66 | .path_metric = IEEE80211_PATH_METRIC_AIRTIME, |
67 | .ie = NULL, |
68 | .ie_len = 0, |
69 | .is_secure = false, |
70 | }; |
71 | |
72 | int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, |
73 | struct net_device *dev, |
74 | const struct mesh_setup *setup, |
75 | const struct mesh_config *conf) |
76 | { |
77 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
78 | int err; |
79 | |
80 | BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN); |
81 | |
82 | ASSERT_WDEV_LOCK(wdev); |
83 | |
84 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) |
85 | return -EOPNOTSUPP; |
86 | |
87 | if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && |
88 | setup->is_secure) |
89 | return -EOPNOTSUPP; |
90 | |
91 | if (wdev->mesh_id_len) |
92 | return -EALREADY; |
93 | |
94 | if (!setup->mesh_id_len) |
95 | return -EINVAL; |
96 | |
97 | if (!rdev->ops->join_mesh) |
98 | return -EOPNOTSUPP; |
99 | |
100 | err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup); |
101 | if (!err) { |
102 | memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len); |
103 | wdev->mesh_id_len = setup->mesh_id_len; |
104 | } |
105 | |
106 | return err; |
107 | } |
108 | |
109 | int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, |
110 | struct net_device *dev, |
111 | const struct mesh_setup *setup, |
112 | const struct mesh_config *conf) |
113 | { |
114 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
115 | int err; |
116 | |
117 | wdev_lock(wdev); |
118 | err = __cfg80211_join_mesh(rdev, dev, setup, conf); |
119 | wdev_unlock(wdev); |
120 | |
121 | return err; |
122 | } |
123 | |
124 | void cfg80211_notify_new_peer_candidate(struct net_device *dev, |
125 | const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp) |
126 | { |
127 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
128 | |
129 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT)) |
130 | return; |
131 | |
132 | nl80211_send_new_peer_candidate(wiphy_to_dev(wdev->wiphy), dev, |
133 | macaddr, ie, ie_len, gfp); |
134 | } |
135 | EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate); |
136 | |
137 | static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, |
138 | struct net_device *dev) |
139 | { |
140 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
141 | int err; |
142 | |
143 | ASSERT_WDEV_LOCK(wdev); |
144 | |
145 | if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) |
146 | return -EOPNOTSUPP; |
147 | |
148 | if (!rdev->ops->leave_mesh) |
149 | return -EOPNOTSUPP; |
150 | |
151 | if (!wdev->mesh_id_len) |
152 | return -ENOTCONN; |
153 | |
154 | err = rdev->ops->leave_mesh(&rdev->wiphy, dev); |
155 | if (!err) |
156 | wdev->mesh_id_len = 0; |
157 | return err; |
158 | } |
159 | |
160 | int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, |
161 | struct net_device *dev) |
162 | { |
163 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
164 | int err; |
165 | |
166 | wdev_lock(wdev); |
167 | err = __cfg80211_leave_mesh(rdev, dev); |
168 | wdev_unlock(wdev); |
169 | |
170 | return err; |
171 | } |
172 |
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od-2011-09-04
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