Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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}