1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* Copyright (c) 2004-2011 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "htc.h"
#include "wmi.h"
#include "debug.h"
struct bss *wlan_node_alloc(int wh_size)
{
struct bss *ni;
ni = kzalloc(sizeof(struct bss), GFP_ATOMIC);
if ((ni != NULL) && wh_size) {
ni->ni_buf = kmalloc(wh_size, GFP_ATOMIC);
if (ni->ni_buf == NULL) {
kfree(ni);
return NULL;
}
}
return ni;
}
void wlan_node_free(struct bss *ni)
{
kfree(ni->ni_buf);
kfree(ni);
}
void wlan_setup_node(struct ath6kl_node_table *nt, struct bss *ni,
const u8 *mac_addr)
{
int hash;
memcpy(ni->ni_macaddr, mac_addr, ETH_ALEN);
hash = ATH6KL_NODE_HASH(mac_addr);
ni->ni_refcnt = 1;
ni->ni_tstamp = jiffies_to_msecs(jiffies);
ni->ni_actcnt = WLAN_NODE_INACT_CNT;
spin_lock_bh(&nt->nt_nodelock);
/* insert at the end of the node list */
ni->ni_list_next = NULL;
ni->ni_list_prev = nt->nt_node_last;
if (nt->nt_node_last != NULL)
nt->nt_node_last->ni_list_next = ni;
nt->nt_node_last = ni;
if (nt->nt_node_first == NULL)
nt->nt_node_first = ni;
/* insert into the hash list */
ni->ni_hash_next = nt->nt_hash[hash];
if (ni->ni_hash_next != NULL)
nt->nt_hash[hash]->ni_hash_prev = ni;
ni->ni_hash_prev = NULL;
nt->nt_hash[hash] = ni;
spin_unlock_bh(&nt->nt_nodelock);
}
struct bss *wlan_find_node(struct ath6kl_node_table *nt,
const u8 *mac_addr)
{
struct bss *ni, *found_ni = NULL;
int hash;
spin_lock_bh(&nt->nt_nodelock);
hash = ATH6KL_NODE_HASH(mac_addr);
for (ni = nt->nt_hash[hash]; ni; ni = ni->ni_hash_next) {
if (memcmp(ni->ni_macaddr, mac_addr, ETH_ALEN) == 0) {
ni->ni_refcnt++;
found_ni = ni;
break;
}
}
spin_unlock_bh(&nt->nt_nodelock);
return found_ni;
}
void wlan_node_reclaim(struct ath6kl_node_table *nt, struct bss *ni)
{
int hash;
spin_lock_bh(&nt->nt_nodelock);
if (ni->ni_list_prev == NULL)
/* fix list head */
nt->nt_node_first = ni->ni_list_next;
else
ni->ni_list_prev->ni_list_next = ni->ni_list_next;
if (ni->ni_list_next == NULL)
/* fix list tail */
nt->nt_node_last = ni->ni_list_prev;
else
ni->ni_list_next->ni_list_prev = ni->ni_list_prev;
if (ni->ni_hash_prev == NULL) {
/* first in list so fix the list head */
hash = ATH6KL_NODE_HASH(ni->ni_macaddr);
nt->nt_hash[hash] = ni->ni_hash_next;
} else {
ni->ni_hash_prev->ni_hash_next = ni->ni_hash_next;
}
if (ni->ni_hash_next != NULL)
ni->ni_hash_next->ni_hash_prev = ni->ni_hash_prev;
wlan_node_free(ni);
spin_unlock_bh(&nt->nt_nodelock);
}
static void wlan_node_dec_free(struct bss *ni)
{
if ((ni->ni_refcnt--) == 1)
wlan_node_free(ni);
}
void wlan_free_allnodes(struct ath6kl_node_table *nt)
{
struct bss *ni;
while ((ni = nt->nt_node_first) != NULL)
wlan_node_reclaim(nt, ni);
}
void wlan_iterate_nodes(struct ath6kl_node_table *nt,
void (*f) (void *arg, struct bss *), void *arg)
{
struct bss *ni;
spin_lock_bh(&nt->nt_nodelock);
for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) {
ni->ni_refcnt++;
(*f) (arg, ni);
wlan_node_dec_free(ni);
}
spin_unlock_bh(&nt->nt_nodelock);
}
void wlan_node_table_init(void *wmi, struct ath6kl_node_table *nt)
{
ath6kl_dbg(ATH6KL_DBG_WLAN_NODE, "node table = 0x%lx\n",
(unsigned long)nt);
memset(nt, 0, sizeof(struct ath6kl_node_table));
spin_lock_init(&nt->nt_nodelock);
nt->nt_node_age = WLAN_NODE_INACT_TIMEOUT_MSEC;
}
void wlan_refresh_inactive_nodes(struct ath6kl *ar)
{
struct ath6kl_node_table *nt = &ar->scan_table;
struct bss *bss;
u8 my_bssid[ETH_ALEN];
u32 now;
ath6kl_wmi_get_current_bssid(ar->wmi, my_bssid);
now = jiffies_to_msecs(jiffies);
bss = nt->nt_node_first;
while (bss != NULL) {
/* refresh all nodes except the current bss */
if (memcmp(my_bssid, bss->ni_macaddr, sizeof(my_bssid)) != 0) {
if (((now - bss->ni_tstamp) > nt->nt_node_age)
|| --bss->ni_actcnt == 0) {
wlan_node_reclaim(nt, bss);
}
}
bss = bss->ni_list_next;
}
}
void wlan_node_table_cleanup(struct ath6kl_node_table *nt)
{
wlan_free_allnodes(nt);
}
struct bss *wlan_find_ssid_node(struct ath6kl_node_table *nt, u8 * ssid,
u32 ssid_len, bool is_wpa2, bool match_ssid)
{
struct bss *ni, *found_ni = NULL;
u8 *ie_ssid;
spin_lock_bh(&nt->nt_nodelock);
for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) {
ie_ssid = ni->ni_cie.ie_ssid;
if ((ie_ssid[1] <= IEEE80211_MAX_SSID_LEN) &&
(memcmp(ssid, &ie_ssid[2], ssid_len) == 0)) {
if (match_ssid ||
(is_wpa2 && ni->ni_cie.ie_rsn != NULL) ||
(!is_wpa2 && ni->ni_cie.ie_wpa != NULL)) {
ni->ni_refcnt++;
found_ni = ni;
break;
}
}
}
spin_unlock_bh(&nt->nt_nodelock);
return found_ni;
}
void wlan_node_return(struct ath6kl_node_table *nt, struct bss *ni)
{
spin_lock_bh(&nt->nt_nodelock);
wlan_node_dec_free(ni);
spin_unlock_bh(&nt->nt_nodelock);
}
|
