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