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gerrit-public.fairphone.software / kernel / msm-4.9 / 29cbe68c516a48a9a88b3226878570c6cbd83c02 / . / net / wireless / mesh.c
blob: e0b9747fe50aa0ae3d6833f4bffa80404e1d7bf7 [file] [log] [blame]
Johannes Berg29cbe682010-12-03 09:20:44 +0100[diff] [blame^]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
36const 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
54int __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
91int 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
106static 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
129int 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}