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
|
/* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors:
*
* Marek Lindner
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#include "main.h"
#include "gateway_common.h"
#include "gateway_client.h"
/* calculates the gateway class from kbit */
static void batadv_kbit_to_gw_bandwidth(int down, int up, long *gw_srv_class)
{
int mdown = 0, tdown, tup, difference;
uint8_t sbit, part;
*gw_srv_class = 0;
difference = 0x0FFFFFFF;
/* test all downspeeds */
for (sbit = 0; sbit < 2; sbit++) {
for (part = 0; part < 16; part++) {
tdown = 32 * (sbit + 2) * (1 << part);
if (abs(tdown - down) < difference) {
*gw_srv_class = (sbit << 7) + (part << 3);
difference = abs(tdown - down);
mdown = tdown;
}
}
}
/* test all upspeeds */
difference = 0x0FFFFFFF;
for (part = 0; part < 8; part++) {
tup = ((part + 1) * (mdown)) / 8;
if (abs(tup - up) < difference) {
*gw_srv_class = (*gw_srv_class & 0xF8) | part;
difference = abs(tup - up);
}
}
}
/* returns the up and downspeeds in kbit, calculated from the class */
void batadv_gw_bandwidth_to_kbit(uint8_t gw_srv_class, int *down, int *up)
{
int sbit = (gw_srv_class & 0x80) >> 7;
int dpart = (gw_srv_class & 0x78) >> 3;
int upart = (gw_srv_class & 0x07);
if (!gw_srv_class) {
*down = 0;
*up = 0;
return;
}
*down = 32 * (sbit + 2) * (1 << dpart);
*up = ((upart + 1) * (*down)) / 8;
}
static bool batadv_parse_gw_bandwidth(struct net_device *net_dev, char *buff,
int *up, int *down)
{
int ret, multi = 1;
char *slash_ptr, *tmp_ptr;
long ldown, lup;
slash_ptr = strchr(buff, '/');
if (slash_ptr)
*slash_ptr = 0;
if (strlen(buff) > 4) {
tmp_ptr = buff + strlen(buff) - 4;
if (strnicmp(tmp_ptr, "mbit", 4) == 0)
multi = 1024;
if ((strnicmp(tmp_ptr, "kbit", 4) == 0) ||
(multi > 1))
*tmp_ptr = '\0';
}
ret = kstrtol(buff, 10, &ldown);
if (ret) {
batadv_err(net_dev,
"Download speed of gateway mode invalid: %s\n",
buff);
return false;
}
*down = ldown * multi;
/* we also got some upload info */
if (slash_ptr) {
multi = 1;
if (strlen(slash_ptr + 1) > 4) {
tmp_ptr = slash_ptr + 1 - 4 + strlen(slash_ptr + 1);
if (strnicmp(tmp_ptr, "mbit", 4) == 0)
multi = 1024;
if ((strnicmp(tmp_ptr, "kbit", 4) == 0) ||
(multi > 1))
*tmp_ptr = '\0';
}
ret = kstrtol(slash_ptr + 1, 10, &lup);
if (ret) {
batadv_err(net_dev,
"Upload speed of gateway mode invalid: %s\n",
slash_ptr + 1);
return false;
}
*up = lup * multi;
}
return true;
}
ssize_t batadv_gw_bandwidth_set(struct net_device *net_dev, char *buff,
size_t count)
{
struct batadv_priv *bat_priv = netdev_priv(net_dev);
long gw_bandwidth_tmp = 0;
int up = 0, down = 0;
bool ret;
ret = batadv_parse_gw_bandwidth(net_dev, buff, &up, &down);
if (!ret)
goto end;
if ((!down) || (down < 256))
down = 2000;
if (!up)
up = down / 5;
batadv_kbit_to_gw_bandwidth(down, up, &gw_bandwidth_tmp);
/* the gw bandwidth we guessed above might not match the given
* speeds, hence we need to calculate it back to show the number
* that is going to be propagated
*/
batadv_gw_bandwidth_to_kbit((uint8_t)gw_bandwidth_tmp, &down, &up);
if (atomic_read(&bat_priv->gw_bandwidth) == gw_bandwidth_tmp)
return count;
batadv_gw_deselect(bat_priv);
batadv_info(net_dev,
"Changing gateway bandwidth from: '%i' to: '%ld' (propagating: %d%s/%d%s)\n",
atomic_read(&bat_priv->gw_bandwidth), gw_bandwidth_tmp,
(down > 2048 ? down / 1024 : down),
(down > 2048 ? "MBit" : "KBit"),
(up > 2048 ? up / 1024 : up),
(up > 2048 ? "MBit" : "KBit"));
atomic_set(&bat_priv->gw_bandwidth, gw_bandwidth_tmp);
end:
return count;
}
|
