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
|
/*
* Linux Wireless Extensions support
*
* Copyright (C) 1999-2012, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* $Id: wl_roam.c 302026 2011-12-09 11:51:50Z $
*/
#include <typedefs.h>
#include <osl.h>
#include <bcmwifi_channels.h>
#include <wlioctl.h>
#define WL_DBG(x)
#define MAX_ROAM_CACHE 100
typedef struct {
chanspec_t chanspec;
int ssid_len;
char ssid[36];
} roam_channel_cache;
static int n_roam_cache = 0;
static int roam_band = WLC_BAND_AUTO;
static roam_channel_cache roam_cache[MAX_ROAM_CACHE];
void set_roam_band(int band)
{
roam_band = band;
}
void reset_roam_cache(void)
{
n_roam_cache = 0;
}
void add_roam_cache(wl_bss_info_t *bi)
{
int i;
uint8 channel;
if (n_roam_cache == MAX_ROAM_CACHE)
return;
for (i = 0; i < n_roam_cache; i++) {
if ((roam_cache[i].ssid_len == bi->SSID_len) &&
(roam_cache[i].chanspec == bi->chanspec) &&
(memcmp(roam_cache[i].ssid, bi->SSID, bi->SSID_len) == 0)) {
/* identical one found, just return */
return;
}
}
roam_cache[n_roam_cache].ssid_len = bi->SSID_len;
channel = (bi->ctl_ch == 0) ? CHSPEC_CHANNEL(bi->chanspec) : bi->ctl_ch;
roam_cache[n_roam_cache].chanspec = WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE | (channel <= 14 ? WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G) | channel;
memcpy(roam_cache[n_roam_cache].ssid, bi->SSID, bi->SSID_len);
n_roam_cache++;
}
int get_roam_channel_list(int target_chan, chanspec_t *channels, const wlc_ssid_t *ssid)
{
int i, n = 1;
uint band;
WL_DBG((" %s: %02d\n", __FUNCTION__, target_chan));
if (target_chan <= 14)
band = WL_CHANSPEC_BAND_2G;
else
band = WL_CHANSPEC_BAND_5G;
*channels++ = (target_chan & WL_CHANSPEC_CHAN_MASK) | band | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
for(i=0; i<n_roam_cache; i++) {
chanspec_t ch = roam_cache[i].chanspec;
if ((roam_cache[i].ssid_len == ssid->SSID_len) &&
((ch & WL_CHANSPEC_CHAN_MASK) != target_chan) &&
((roam_band == WLC_BAND_AUTO) || ((roam_band == WLC_BAND_2G) && CHSPEC_IS2G(ch)) || ((roam_band == WLC_BAND_5G) && CHSPEC_IS5G(ch))) &&
(memcmp(roam_cache[i].ssid, ssid->SSID, ssid->SSID_len) == 0)) {
/* match found, add it */
*channels = ch & WL_CHANSPEC_CHAN_MASK;
if (*channels <= 14)
*channels |= WL_CHANSPEC_BAND_2G | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
else
*channels |= WL_CHANSPEC_BAND_5G | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
WL_DBG((" %s: %02d 0x%04X\n", __FUNCTION__, ch & WL_CHANSPEC_CHAN_MASK, *channels));
channels++; n++;
}
}
return n;
}
void print_roam_cache(void)
{
int i;
WL_DBG((" %d cache\n", n_roam_cache));
for (i = 0; i < n_roam_cache; i++) {
roam_cache[i].ssid[roam_cache[i].ssid_len] = 0;
WL_DBG(("0x%02X %02d %s\n", roam_cache[i].chanspec, roam_cache[i].ssid_len, roam_cache[i].ssid));
}
}
|
