cfg80211/mac80211: add mesh join/leave commands
[linux-2.6.git] / net / wireless / mesh.c
1 #include <linux/ieee80211.h>
2 #include <net/cfg80211.h>
3 #include "core.h"
4
5 /* Default values, timeouts in ms */
6 #define MESH_TTL                31
7 #define MESH_DEFAULT_ELEMENT_TTL 31
8 #define MESH_MAX_RETR           3
9 #define MESH_RET_T              100
10 #define MESH_CONF_T             100
11 #define MESH_HOLD_T             100
12
13 #define MESH_PATH_TIMEOUT       5000
14
15 /*
16  * Minimum interval between two consecutive PREQs originated by the same
17  * interface
18  */
19 #define MESH_PREQ_MIN_INT       10
20 #define MESH_DIAM_TRAVERSAL_TIME 50
21
22 /*
23  * A path will be refreshed if it is used PATH_REFRESH_TIME milliseconds
24  * before timing out.  This way it will remain ACTIVE and no data frames
25  * will be unnecessarily held in the pending queue.
26  */
27 #define MESH_PATH_REFRESH_TIME                  1000
28 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
29
30 /* Default maximum number of established plinks per interface */
31 #define MESH_MAX_ESTAB_PLINKS   32
32
33 #define MESH_MAX_PREQ_RETRIES   4
34
35
36 const struct mesh_config default_mesh_config = {
37         .dot11MeshRetryTimeout = MESH_RET_T,
38         .dot11MeshConfirmTimeout = MESH_CONF_T,
39         .dot11MeshHoldingTimeout = MESH_HOLD_T,
40         .dot11MeshMaxRetries = MESH_MAX_RETR,
41         .dot11MeshTTL = MESH_TTL,
42         .element_ttl = MESH_DEFAULT_ELEMENT_TTL,
43         .auto_open_plinks = true,
44         .dot11MeshMaxPeerLinks = MESH_MAX_ESTAB_PLINKS,
45         .dot11MeshHWMPactivePathTimeout = MESH_PATH_TIMEOUT,
46         .dot11MeshHWMPpreqMinInterval = MESH_PREQ_MIN_INT,
47         .dot11MeshHWMPnetDiameterTraversalTime = MESH_DIAM_TRAVERSAL_TIME,
48         .dot11MeshHWMPmaxPREQretries = MESH_MAX_PREQ_RETRIES,
49         .path_refresh_time = MESH_PATH_REFRESH_TIME,
50         .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT,
51 };
52
53
54 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
55                          struct net_device *dev,
56                          const u8 *mesh_id, u8 mesh_id_len,
57                          const struct mesh_config *conf)
58 {
59         struct wireless_dev *wdev = dev->ieee80211_ptr;
60         struct mesh_setup setup = {
61                 .mesh_id = mesh_id,
62                 .mesh_id_len = mesh_id_len,
63         };
64         int err;
65
66         BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
67
68         ASSERT_WDEV_LOCK(wdev);
69
70         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
71                 return -EOPNOTSUPP;
72
73         if (wdev->mesh_id_len)
74                 return -EALREADY;
75
76         if (!mesh_id_len)
77                 return -EINVAL;
78
79         if (!rdev->ops->join_mesh)
80                 return -EOPNOTSUPP;
81
82         err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, &setup);
83         if (!err) {
84                 memcpy(wdev->ssid, mesh_id, mesh_id_len);
85                 wdev->mesh_id_len = mesh_id_len;
86         }
87
88         return err;
89 }
90
91 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
92                        struct net_device *dev,
93                        const u8 *mesh_id, u8 mesh_id_len,
94                        const struct mesh_config *conf)
95 {
96         struct wireless_dev *wdev = dev->ieee80211_ptr;
97         int err;
98
99         wdev_lock(wdev);
100         err = __cfg80211_join_mesh(rdev, dev, mesh_id, mesh_id_len, conf);
101         wdev_unlock(wdev);
102
103         return err;
104 }
105
106 static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
107                                  struct net_device *dev)
108 {
109         struct wireless_dev *wdev = dev->ieee80211_ptr;
110         int err;
111
112         ASSERT_WDEV_LOCK(wdev);
113
114         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
115                 return -EOPNOTSUPP;
116
117         if (!rdev->ops->leave_mesh)
118                 return -EOPNOTSUPP;
119
120         if (!wdev->mesh_id_len)
121                 return -ENOTCONN;
122
123         err = rdev->ops->leave_mesh(&rdev->wiphy, dev);
124         if (!err)
125                 wdev->mesh_id_len = 0;
126         return err;
127 }
128
129 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
130                         struct net_device *dev)
131 {
132         struct wireless_dev *wdev = dev->ieee80211_ptr;
133         int err;
134
135         wdev_lock(wdev);
136         err = __cfg80211_leave_mesh(rdev, dev);
137         wdev_unlock(wdev);
138
139         return err;
140 }