隔壁学校的 wifi 网络不错，但是因为离得远，信号差，只能在窗户边能连得上。买了一个 360 wifi 中继器，但速度掉的厉害，而用手机直接连接网速倒是正常，就想着把手机作为 wifi 中继器。记得自己的第一台 android 手机，中兴 v880 当时是支持 wifi 中继的，一边连着 wifi，一边扩展 wifi 信号，后来才知道那算是中兴特有的。找了一圈，并没有找到这样的 APP，fqrouter2 倒是有这个功能，但是作者已经停止维护，在我手机上直接启动失败。参考 fqrouter2 的文章和脚本终于让 oneplus3 STA+AP 一起工作了。
使用一加3做 wifi 中继器脚本配置
- ONEPLUS A3000
- 系统 cm-13.0, Android 6.0.1
- root 权限
- iw iwlist wpa_cli 等二进制文件
一加3 采用的是QCA6164A wifi 芯片，支持 802.11ac，最高有 434M 带宽。
系统本身自带的便携式 WLAN 热点功能，只能分享移动数据的网络，不能够做为一个 wifi repeater，开启时自动关闭 wifi 连接和 wpa_supplicant进程，并开启 hostapd 进程来提供 AP。 但系统支持 WIFI Direct 功能，也就是说设备在连接着 wifi 的时，可以开启一个热点，其它设备可以通过这个热点加入到 P2P group 中。但是 WIFI Direct 不支持手动设置密码，连接外网等。
查看网卡设备信息
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
| root@oneplus3:/data/local/tmp # iw phy
Wiphy phy3
max # scan SSIDs: 10
max scan IEs length: 500 bytes
max # sched scan SSIDs: 0
max # match sets: 0
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports roaming.
Device supports T-DLS.
Supported Ciphers:
* WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5)
* TKIP (00-0f-ac:2)
* 00-40-96:254
* 00-40-96:255
* CCMP-128 (00-0f-ac:4)
* WPI-SMS4 (00-14-72:1)
* CMAC (00-0f-ac:6)
Available Antennas: TX 0 RX 0
Supported interface modes:
* IBSS
* managed
* AP
* P2P-client
* P2P-GO
Band 1:
Capabilities: 0x9072
HT20/HT40
Static SM Power Save
RX Greenfield
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
L-SIG TXOP protection
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT Max RX data rate: 72 Mbps
HT TX/RX MCS rate indexes supported: 0-7
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps
* 5.5 Mbps
* 11.0 Mbps
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
* 2484 MHz [14] (disabled)
Band 2:
Capabilities: 0x9072
HT20/HT40
Static SM Power Save
RX Greenfield
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
L-SIG TXOP protection
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT Max RX data rate: 72 Mbps
HT TX/RX MCS rate indexes supported: 0-7
VHT Capabilities (0x000003b2):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
TX STBC
VHT RX MCS set:
1 streams: MCS 0-7
2 streams: MCS 0-7
3 streams: MCS 0-7
4 streams: MCS 0-7
5 streams: MCS 0-7
6 streams: MCS 0-7
7 streams: MCS 0-7
8 streams: MCS 0-7
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-7
2 streams: MCS 0-7
3 streams: MCS 0-7
4 streams: MCS 0-7
5 streams: MCS 0-7
6 streams: MCS 0-7
7 streams: MCS 0-7
8 streams: MCS 0-7
VHT TX highest supported: 0 Mbps
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 4920 MHz [184] (disabled)
* 4940 MHz [188] (disabled)
* 4960 MHz [192] (disabled)
* 4980 MHz [196] (disabled)
* 5040 MHz [8] (disabled)
* 5060 MHz [12] (disabled)
* 5080 MHz [16] (disabled)
* 5180 MHz [36] (23.0 dBm)
* 5200 MHz [40] (23.0 dBm)
* 5220 MHz [44] (23.0 dBm)
* 5240 MHz [48] (23.0 dBm)
* 5260 MHz [52] (23.0 dBm) (radar detection)
* 5280 MHz [56] (23.0 dBm) (radar detection)
* 5300 MHz [60] (23.0 dBm) (radar detection)
* 5320 MHz [64] (23.0 dBm) (radar detection)
* 5500 MHz [100] (disabled)
* 5520 MHz [104] (disabled)
* 5540 MHz [108] (disabled)
* 5560 MHz [112] (disabled)
* 5580 MHz [116] (disabled)
* 5600 MHz [120] (disabled)
* 5620 MHz [124] (disabled)
* 5640 MHz [128] (disabled)
* 5660 MHz [132] (disabled)
* 5680 MHz [136] (disabled)
* 5700 MHz [140] (disabled)
* 5720 MHz [144] (disabled)
* 5745 MHz [149] (30.0 dBm)
* 5765 MHz [153] (30.0 dBm)
* 5785 MHz [157] (30.0 dBm)
* 5805 MHz [161] (30.0 dBm)
* 5825 MHz [165] (30.0 dBm)
* 5852 MHz [170] (disabled)
* 5855 MHz [171] (disabled)
* 5860 MHz [172] (disabled)
* 5865 MHz [173] (disabled)
* 5870 MHz [174] (disabled)
* 5875 MHz [175] (disabled)
* 5880 MHz [176] (disabled)
* 5885 MHz [177] (disabled)
* 5890 MHz [178] (disabled)
* 5895 MHz [179] (disabled)
* 5900 MHz [180] (disabled)
* 5905 MHz [181] (disabled)
* 5910 MHz [182] (disabled)
* 5915 MHz [183] (disabled)
* 5920 MHz [184] (disabled)
Supported commands:
* new_interface
* set_interface
* new_key
* start_ap
* new_station
* set_bss
* join_ibss
* set_pmksa
* del_pmksa
* flush_pmksa
* remain_on_channel
* frame
* frame_wait_cancel
* set_channel
* tdls_mgmt
* tdls_oper
* testmode
* channel_switch
* connect
* disconnect
Supported TX frame types:
* IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
Supported RX frame types:
* IBSS: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* managed: 0x40 0xd0
* AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-client: 0x40 0xd0
* P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
WoWLAN support:
* wake up on anything (device continues operating normally)
* wake up on disconnect
* wake up on magic packet
* wake up on pattern match, up to 4 patterns of 6-64 bytes,
maximum packet offset 0 bytes
* can do GTK rekeying
* wake up on GTK rekey failure
* wake up on EAP identity request
* wake up on 4-way handshake
* wake up on rfkill release
software interface modes (can always be added):
valid interface combinations:
* #{ managed } <= 3,
total <= 3, #channels <= 2
* #{ managed } <= 1, #{ IBSS } <= 1,
total <= 2, #channels <= 1
* #{ AP } <= 2,
total <= 2, #channels <= 2
* #{ P2P-client } <= 1, #{ P2P-GO } <= 1,
total <= 2, #channels <= 2
* #{ managed } <= 2, #{ AP } <= 1,
total <= 3, #channels <= 2, STA/AP BI must match
* #{ managed } <= 2, #{ P2P-client, P2P-GO } <= 2,
total <= 4, #channels <= 2, STA/AP BI must match
* #{ managed } <= 2, #{ P2P-GO } <= 1, #{ AP } <= 1,
total <= 4, #channels <= 2, STA/AP BI must match
Device supports HT-IBSS.
Device supports scan flush.
|
该芯片是支持这些功能
1
2
3
4
5
6
| Supported interface modes:
* IBSS
* managed
* AP
* P2P-client
* P2P-GO
|
1
2
3
4
5
6
7
8
9
10
11
12
13
| root@oneplus3:/ # iw dev
phy#0
Interface p2p0
ifindex 24
wdev 0x2
addr c2:ee:fb:d6:08:0d
type managed
Interface wlan0
ifindex 23
wdev 0x1
addr c0:ee:fb:d6:08:0d
ssid BIUBIU_5G
type managed
|
网卡有两个 interface，默认启用了 p2p 接口，但开启系统的热点功能后
1
2
3
4
5
6
7
8
| root@oneplus3:/ # iw dev
phy#1
Interface wlan0
ifindex 27
wdev 0x100000001
addr c0:ee:fb:d6:08:0d
ssid ONEPLUS A3000
type AP
|
p2p0 端口消失，只剩下了 wlan0 端口，查看 hostapd 进程的 cmdline
1
2
| root@oneplus3:/ # cat /proc/11047/cmdline
/system/bin/hostapd -e /data/misc/wifi/entropy.bin /data/misc/wifi/hostapd.conf
|
先前的 wpa_supplicant 进程是
1
2
3
| root@oneplus3:/ # cat /proc/11257/cmdline
/system/bin/wpa_supplicant -ip2p0- Dnl80211 -c/data/misc/wifi/p2p_supplicant.conf -I/system/etc/wifi/p2p_supplicant_overlay.conf -N -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf -I/system/etc/wifi/wpa_supplicant_overlay.conf -O/data/misc/wifi/sockets -puse_p2p_group_interface=1 -e/data/misc/wi
fi/entropy.bin
|
wpa_supplicant 同时管理着 p2p0 wlan0 两个 interface，p2p0 interface 的状态
1
2
3
4
5
| root@oneplus3:/data/local/tmp # ./wpa_cli -p /data/misc/wifi/sockets/ -i p2p0 status
wpa_state=DISCONNECTED
p2p_device_address=c2:ee:fb:d6:08:0d
address=c2:ee:fb:d6:08:0d
uuid=4227ede7-6911-52a9-987c-6ce45048dfe1
|
处于未连接状态，使用 wpa_cli 直接添加一个固定的 p2p 分组， wpa_cli 支持交互模式。进行此操作之前，备份一下 /data/misc/wifi/p2p_supplicant.conf，防止出错
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
| root@oneplus3:/data/local/tmp # ./wpa_cli -p /data/misc/wifi/sockets/ -i p2p0
wpa_cli v2.5-devel-6.0.1
Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi> and contributors
This software may be distributed under the terms of the BSD license.
See README for more details.
Interactive mode
> add_network
0
> set_network 0 mode 3
OK
> set_network 0 disabled 2
OK
> set_network 0 ssid "loopax"
OK
> set_network 0 key_mgmt WPA-PSK
OK
> set_network 0 proto RSN
OK
> set_network 0 pairwise CCMP
OK
> set_network 0 psk "12345678"
OK
> save_config
OK
> list_network
network id / ssid / bssid / flags
0 loopax any [DISABLED][P2P-PERSISTENT]
> p2p_group_add persistent=0
OK
<3>P2P-GROUP-STARTED p2p-p2p0-0 GO ssid="loopax" freq=5765 passphrase="12345678" go_dev_addr=c2:ee:fb:d6:08:0d [PERSISTENT]
> quit
|
此时，热点就起来了
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
| root@oneplus3:/ # iw dev
phy#3
Interface p2p-p2p0-0
ifindex 33
wdev 0x300000003
addr c2:ee:fb:d6:88:0d
ssid loopax
type P2P-GO
Interface p2p0
ifindex 32
wdev 0x300000002
addr c2:ee:fb:d6:08:0d
type managed
Interface wlan0
ifindex 31
wdev 0x300000001
addr c0:ee:fb:d6:08:0d
ssid BIUBIU_5G
type managed
|
起来了一个新的接口 p2p-p2p0-0，type 是 P2P-GO, 该接口状态
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| root@oneplus3:/data/local/tmp # ./wpa_cli -p /data/misc/wifi/sockets/ -i p2p-p2p0-0 status
bssid=c2:ee:fb:d6:88:0d
freq=5765
ssid=loopax
id=0
mode=P2P GO
pairwise_cipher=CCMP
group_cipher=CCMP
key_mgmt=WPA2-PSK
wpa_state=COMPLETED
ip_address=192.168.49.1
p2p_device_address=c2:ee:fb:d6:08:0d
address=c2:ee:fb:d6:88:0d
uuid=4227ede7-6911-52a9-987c-6ce45048dfe1
|
热点可以正常连接，但是不能够上网，也 ping 不通 IP，开启设备的网络转发 和 NAT
1
2
3
4
5
| root@oneplus3:/ # echo 1 > /proc/sys/net/ipv4/ip_forward
root@oneplus3:/ # iptables -F
root@oneplus3:/ # iptables -P INPUT ACCEPT
root@oneplus3:/ # iptables -P FORWARD ACCEPT
root@oneplus3:/ # iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
|
这样 ip 就能 ping 的通了，但是 DNS 还是不正常，连接热点的设备手动设置 DNS 的话，就可以正常上网了。重启系统的 dnsmasq，让 DHCP 自动分配 DNS
1
2
3
| root@oneplus3:/ # killall dnsmasq
root@oneplus3:/ # /system/bin/dnsmasq --no-resolv --no-poll --dhcp-authoritative --server=114.114.114.114 --dhcp-option-force=43,ANDROID_METERED --pid-file --dhcp-range=192
.168.49.2,192.168.49.254,1h
|
这样就是配置了一个完整的 wifi 中继了。
再次开启中继只需
1
| root@oneplus3:/data/local/tmp # ./wpa_cli -p /data/misc/wifi/sockets/ -i p2p0 p2p_group_add persistent=0
|
然后在配置网络转发，和 iptables、 dhcp。
默认两个接口是使用同样的 channel，但是也是可以指定频道的,如
1
| root@oneplus3:/data/local/tmp # ./wpa_cli -p /data/misc/wifi/sockets/ -i p2p0 p2p_group_add persistent=0 freq=5825
|
获取 channel 信息
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
| root@oneplus3:/ # iwlist wlan0 channel
wlan0 26 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 36 : 5.18 GHz
Channel 40 : 5.2 GHz
Channel 44 : 5.22 GHz
Channel 48 : 5.24 GHz
Channel 52 : 5.26 GHz
Channel 56 : 5.28 GHz
Channel 60 : 5.3 GHz
Channel 64 : 5.32 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Channel 157 : 5.785 GHz
Channel 161 : 5.805 GHz
Channel 165 : 5.825 GHz
Current Frequency:5.765 GHz (Channel 153)
|
可在 /data/misc/dhcp/dnsmasq.leases 文件中查看连接的客户端。
参考