imx6ul之OpenWRT中使用无线网卡做中继器与AP热点9 G1 _5 C# s8 e5 [. P
- ~5 B+ m5 B$ V c/ V中继器与AP的实现这里我们假定中继器完成下面这样的一个功能: Wired Network ---> Wireless Network ---> 上级无线路由器, y! n0 n0 V& H" M* Y" {
即从外部插入一个网线,通过imx6UL上面的无线网卡将数据转发到上级的路由器上面, 当然也可以完成下面这样的传送:
" i( ]" b" |# P2 X Wireless Network(AP mode) --> Wireless Network(Client) --> 上级无线路由器! L* N1 e6 g, _- |% d' R* R% q
即设立一个AP热点,相当于一个路由器,然后再将这个AP的数据通过另外一个无线网卡转发到上一级的路由器或者WLAN上面。 用图片来表示如下:
; X% s/ _7 N; I* B5 w1 s; e要完成这些功能, 我们需要: - 1. 驱动无线网卡
- 2. 建立AP热点
- 3. 其中一个wired或者wireless介入到上一级路由器或者WLAN中
- 4. 使用IPTables来对数据包进行转发! Z( L O) P+ m( P% [0 X9 c
) O \5 ?! E+ K% Z4 s
对于1,我们在前面已经完成,对于Wired Network访问WLAN我们也已经在前面完成。所以这篇我们将完成2与3, 以及4。 ) l P( C, E7 T7 S
AP热点的建立建立AP热点,我们使用经典的Hostapd工具来完成, 这个在OpenWRT中已经存在, 直接选上,然后build即可。 Hostapd的使用
2 U" B/ {: _1 X, t# P* z8 E然后我们可以查看对应的使用帮助 [plain] view plaincopy& ]0 P& K4 k. j d
7 s# x0 p: M0 K2 Q$ f0 L) `
# s9 `+ _' Y. `* Q9 k- root@(none):/# hostapd --help
- hostapd: invalid option -- '-'
- hostapd v2.5
- User space daemon for IEEE 802.11 AP management,
- IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator
- Copyright (c) 2002-2015, Jouni Malinen <j@w1.fi> and contributors
-
- usage: hostapd [-hdBKtv] [-P <ID file>] [-e <entropy file>] \
- [-g <global ctrl_iface>] [-G <group>] \
- <configuration file(s)>
-
- options:
- -h show this usage
- -d show more debug messages (-dd for even more)
- -B run daemon in the background
- -e entropy file
- -g global control interface path
- -G group for control interfaces
- -P PID file
- -K include key data in debug messages
- -t include timestamps in some debug messages
- -v show hostapd version " x, w/ J; ^; o* r% ]9 H! M
0 C# t6 P9 j7 f* T" S: }) w
6 a' \+ a3 g' B因此可以确定需要一个config文件, 这个configuration file我们如下填写:) c8 E4 L+ E3 W- C3 K6 `2 ~3 A
[plain] view plaincopy
9 u/ Y/ @7 G0 X& x p! P. S# c
- C+ [3 R" e4 T- K5 e$ u2 z; U! N2 C
" R5 }) y- ~& t7 C7 `" @: ^# Y- root@(none):/# cat /etc/hostapd_ori.conf
- interface=wlan1
- ssid=TonyOpenWRT
- channel=9
- hw_mode=g
- ignore_broadcast_ssid=0
- auth_algs=1
- wpa=3
- wpa_passphrase=TonyHo123456
- wpa_key_mgmt=WPA-PSK
- wpa_pairwise=TKIP
- rsn_pairwise=CCMP
+ W4 ?5 v# w) [* l @
$ ~5 e/ q0 W( P$ n* K7 y即我们创建一个SSID为TonyOpenWRT的热点, wpa_passphrase为密码, 后面的为加密方式, 然后还选择了channel, 这个channel可以通过前面的iw list来查看, 例如其中一个为:8 s6 i' W) [1 ~
[plain] view plaincopy
9 _, O0 [+ |/ D7 R9 r( A- N; e7 R. ?0 p2 p4 q; m2 l; S1 h
K/ n! J4 k. ^9 G- 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] (disabled)
- * 2472 MHz [13] (disabled)
- * 2484 MHz [14] (disabled) + Z7 Z5 _7 i- r( a2 J, Y
% D* R1 F7 g, K3 l) q0 X, t, ?' c
) `& g) Y+ S' i6 W8 C- U9 y
后面的【】中的就是channel了。
& F. @: a4 n1 r L+ z# I# H5 o+ ^建立AP
# R" ?& H6 S: [. i1 C, D y: f然后我们使用后台运行的方式启动hostapd,并且打开debug信息,便于我们查看: [plain] view plaincopy
+ f; O: ]( D1 [; ]5 x- x4 E# j; {6 y; V6 [, F; a
0 Y T+ b6 |' i2 t0 J) I5 K; R2 X
- root@(none):/# hostapd -B -d /etc/hostapd_ori.conf
- random: Trying to read entropy from /dev/random
- Configuration file: /etc/hostapd_ori.conf
- rfkill: Cannot open RFKILL control device
- nl80211: RFKILL status not available
- nl80211: TDLS supported
- nl80211: TDLS external setup
- nl80211: Supported cipher 00-0f-ac:1
- nl80211: Supported cipher 00-0f-ac:5
- nl80211: Supported cipher 00-0f-ac:2
- nl80211: Supported cipher 00-0f-ac:4
- nl80211: Supported cipher 00-0f-ac:6
- nl80211: Using driver-based off-channel TX
- nl80211: Use separate P2P group interface (driver advertised support)
- nl80211: interface wlan1 in phy phy1
- nl80211: Set mode ifindex 9 iftype 3 (AP)
- nl80211: Setup AP(wlan1) - device_ap_sme=0 use_monitor=0
- nl80211: Subscribe to mgmt frames with AP handle 0xcfd5d8
- nl80211: Register frame type=0xb0 (WLAN_FC_STYPE_AUTH) nl_handle=0xcfd5d8 match=
- nl80211: Register frame type=0x0 (WLAN_FC_STYPE_ASSOC_REQ) nl_handle=0xcfd5d8 match=
- nl80211: Register frame type=0x20 (WLAN_FC_STYPE_REASSOC_REQ) nl_handle=0xcfd5d8 match=
- nl80211: Register frame type=0xa0 (WLAN_FC_STYPE_DISASSOC) nl_handle=0xcfd5d8 match=
- nl80211: Register frame type=0xc0 (WLAN_FC_STYPE_DEAUTH) nl_handle=0xcfd5d8 match=
- nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0xcfd5d8 match=
- nl80211: Register frame type=0x40 (WLAN_FC_STYPE_PROBE_REQ) nl_handle=0xcfd5d8 match=
- [ 495.443813] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
- nl80211: Add own interface ifindex 9
- nl80211: if_indices[16]: 9
- phy: phy1
- BSS count 1, BSSID mask 00:00:00:00:00:00 (0 bits)
- nl80211: Regulatory information - country=00
- nl80211: 2402-2472 @ 40 MHz 20 mBm
- nl80211: 2457-2482 @ 40 MHz 20 mBm (no IR)
- nl80211: 2474-2494 @ 20 MHz 20 mBm (no OFDM) (no IR)
- nl80211: 5170-5250 @ 160 MHz 20 mBm (no IR)
- nl80211: 5250-5330 @ 160 MHz 20 mBm (DFS) (no IR)
- nl80211: 5490-5730 @ 160 MHz 20 mBm (DFS) (no IR)
- nl80211: Added 802.11b mode based on 802.11g information
- Completing interface initialization
- Mode: IEEE 802.11g Channel: 9 Frequency: 2452 MHz
- DFS 0 channels required radar detection
- nl80211: Set freq 2452 (ht_enabled=0, vht_enabled=0, bandwidth=20 MHz, cf1=2452 MHz, cf2=0 MHz)
- * freq=2452
- * vht_enabled=0
- * ht_enabled=0
- RATE[0] rate=10 flags=0x1
- RATE[1] rate=20 flags=0x1
- RATE[2] rate=55 flags=0x1
- RATE[3] rate=110 flags=0x1
- RATE[4] rate=60 flags=0x0
- RATE[5] rate=90 flags=0x0
- RATE[6] rate=120 flags=0x0
- RATE[7] rate=180 flags=0x0
- RATE[8] rate=240 flags=0x0
- RATE[9] rate=360 flags=0x0
- RATE[10] rate=480 flags=0x0
- RATE[11] rate=540 flags=0x0
- hostapd_setup_bss(hapd=0xcfcf50 (wlan1), first=1)
- wlan1: Flushing old station entries
- nl80211: flush -> DEL_STATION wlan1 (all)
- wlan1: Deauthenticate all stations
- nl80211: send_mlme - da= ff:ff:ff:ff:ff:ff noack=0 freq=0 no_cck=0 offchanok=0 wait_time=0 fc=0xc0 (WLAN_FC_STYPE_DEAUTH) nlmode=3
- nl80211: send_mlme -> send_frame
- nl80211: send_frame - Use bss->freq=2452
- nl80211: send_frame -> send_frame_cmd
- nl80211: Frame command failed: ret=-16 (Device or resource busy) (freq=2452 wait=0)
- wpa_driver_nl80211_set_key: ifindex=9 (wlan1) alg=0 addr=(nil) key_idx=0 set_tx=0 seq_len=0 key_len=0
- wpa_driver_nl80211_set_key: ifindex=9 (wlan1) alg=0 addr=(nil) key_idx=1 set_tx=0 seq_len=0 key_len=0
- wpa_driver_nl80211_set_key: ifindex=9 (wlan1) alg=0 addr=(nil) key_idx=2 set_tx=0 seq_len=0 key_len=0
- wpa_driver_nl80211_set_key: ifindex=9 (wlan1) alg=0 addr=(nil) key_idx=3 set_tx=0 seq_len=0 key_len=0
- Using interface wlan1 with hwaddr 94:0c:6d:7c:12:f6 and ssid "TonyOpenWRT"
- Deriving WPA PSK based on passphrase
- SSID - hexdump_ascii(len=11):
- 54 6f 6e 79 4f 70 65 6e 57 52 54 TonyOpenWRT
- PSK (ASCII passphrase) - hexdump_ascii(len=12): [REMOVED]
- PSK (from passphrase) - hexdump(len=32): [REMOVED]
- random: Got 15/20 bytes from /dev/random
- random: Only 15/20 bytes of strong random data available from /dev/random
- random: Not enough entropy pool available for secure operations
- WPA: Not enough entropy in random pool for secure operations - update keys later when the first station connects
- GMK - hexdump(len=32): [REMOVED]
- Key Counter - hexdump(len=32): [REMOVED]
- WPA: Delay group state machine start until Beacon frames have been configured
- nl80211: Set beacon (beacon_set=0)
- nl80211: Beacon head - hexdump(len=62): 80 00 00 00 ff ff ff ff ff ff 94 0c 6d 7c 12 f6 94 0c 6d 7c 12 f6 00 00 00 00 00 00 00 00 00 00 64 00 11 04 00 0b 54 6f 6e 79 4f 70 65 6e 57 52 54 01 08 82 84 8b 96 0c 12 1y
- 01 09
- nl80211: Beacon tail - hexdump(len=65): 2a 01 04 32 04 30 48 60 6c 30 14 01 00 00 0f ac 02 01 00 00 0f ac 04 01 00 00 0f ac 02 00 00 dd 16 00 50 f2 01 01 00 00 50 f2 02 01 00 00 50 f2 02 01 00 00 50 f2 02 7f 08 00
- nl80211: ifindex=9
- nl80211: beacon_int=100
- nl80211: dtim_period=2
- nl80211: ssid - hexdump_ascii(len=11):
- 54 6f 6e 79 4f 70 65 6e 57 52 54 TonyOpenWRT
- * beacon_int=100
- nl80211: hidden SSID not in use
- nl80211: privacy=1
- nl80211: auth_algs=0x1
- nl80211: wpa_version=0x3
- nl80211: key_mgmt_suites=0x2
- nl80211: pairwise_ciphers=0x18
- nl80211: group_cipher=0x8
- nl80211: SMPS mode - off
- nl80211: beacon_ies - hexdump(len=10): 7f 08 00 00 00 00 00 00 00 40
- nl80211: proberesp_ies - hexdump(len=10): 7f 08 00 00 00 00 00 00 00 40
- nl80211: assocresp_ies - hexdump(len=10): 7f 08 00 00 00 00 00 00 00 40
- WPA: Start group state machine to set initial keys
- WPA: group state machine entering state GTK_INIT (VLAN-ID 0)
- GTK - hexdump(len=32): [REMOVED]
- WPA: group state machine entering state SETKEYSDONE (VLAN-ID 0)
- wpa_driver_nl80211_set_key: ifindex=9 (wlan1) alg=2 addr=0x8dc74 key_idx=1 set_tx=1 seq_len=0 key_len=32
- nl80211: KEY_DATA - hexdump(len=32): [REMOVED]
- broadcast key
- nl80211: Set wlan1 operstate 0->1 (UP)
- netlink: Operstate: ifindex=9 linkmode=-1 (no change), operstate=6 (IF_OPER_UP)
- wlan1: interface state UNINITIALIZED->ENABLED
- wlan1: AP-ENABLED
- wlan1: Setup of interface done.
- ctrl_iface not configured! 1 h( k5 W; [6 i* M# p
8 J3 p* F4 |9 @" h& d' [, D' _4 P$ r' ]: i
其中里面用到了加密时候需要的随机数,这个是使用内核中的random节点来生成的,所以我们在内核这两个还需要添加random驱动。8 R1 i4 t6 p( b) D! @
验证AP在验证之前,我们需要给我们的这个网卡自己一个IP地址, 因此直接: [plain] view plaincopy6 ?0 Z9 i2 V4 [! ^) J
3 B7 U( w i# K0 I% Q$ z
3 J* ?0 K' @5 Z( v. p5 \5 j. A
- root@(none):/# ifconfig wlan1 192.168.2.1
- root@(none):/# ifconfig wlan1
- wlan1 Link encap:Ethernet HWaddr 94:0c:6d:7c:12:f6
- inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
- inet6 addr: fe80::960c:6dff:fe7c:12f6/64 Scopeink
- UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
- RX packets:131 errors:0 dropped:0 overruns:0 frame:0
- TX packets:106 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:1000
- RX bytes:20162 (19.6 KiB) TX bytes:20954 (20.4 KiB)
~6 u+ r9 K# l. g+ r f* ^0 Q
- I' V4 ^4 W; _$ w" J7 n; s9 _ N% _. _6 v7 S
然后我们打开手机查看是否可以看到我们的热点:6 u. L- Y x: }7 a3 p7 o% e% @2 V1 _
5 O3 @1 }( f+ N6 ], y- S; I/ d# v
然后我们使用手动配置IP方式连接热点
8 d n1 M1 ]5 L( f' D) h1 K 3 F O- [+ c" J/ n
连接完成后, 我们可以看到已经连接的状态:
1 o- k* N, @* @8 m V# ?然后在手机上面可以Ping一把确定是否连通:
8 k- A! x7 v$ ]- {' Q然后在iMX6UL上面也来ping一把这个手机: [plain] view plaincopy
) q% x2 L! z9 P9 k5 l6 n" j, v( f
( A( Q+ x/ _! m* w- root@(none):/# ping 192.168.2.111
- PING 192.168.2.111 (192.168.2.111): 56 data bytes
- 64 bytes from 192.168.2.111: seq=0 ttl=64 time=90.952 ms
- 64 bytes from 192.168.2.111: seq=1 ttl=64 time=143.093 ms
- 64 bytes from 192.168.2.111: seq=2 ttl=64 time=4.508 ms
- 64 bytes from 192.168.2.111: seq=3 ttl=64 time=46.859 ms
- 64 bytes from 192.168.2.111: seq=4 ttl=64 time=2.539 ms
- 64 bytes from 192.168.2.111: seq=5 ttl=64 time=2.697 ms
- ^C
- --- 192.168.2.111 ping statistics ---
- 6 packets transmitted, 6 packets received, 0% packet loss
- round-trip min/avg/max = 2.539/48.441/143.093 ms & {: D! V8 g" _- d; B- H8 b- m
0 O2 f! U2 u7 _
9 G( w1 ?' n; r至此,基本的连接就好了, 如果想要自动获取IP地址,那么我们还需要配置DHCPD。
) O/ o3 Q$ s3 t% l$ H! n1 `3 d U% {1 s- X# g
wpa_supplicant的配置前面我们使用其中一个网卡,配置好了AP, 接下来我们使用另外一个Wireless作为上一级router的接入设备。 这个可以参考我以前写的文章: Yocto i.MX6 (TQIMX6) (03) : wifi网卡的相关工具wpa_supplicant与dhcp
0 ], \9 T/ k, A0 F. W! E" U _; z但是wpa_supplicant的版本升级后, 和hostapd的使用基本一致起来, 因此以前的使用方法稍微有些不同了。 配置创建一个配置文件,写明需要接入的SSID,密码等信息: [plain] view plaincopy! x$ t' x: } N1 }9 [9 i& a
3 o) S# `8 q& y* N3 F8 |
6 }9 ] K" D. j- root@(none):/# cat /etc/wpa.conf
- ctrl_interface=/var/run/wpa_supplicant
- network={
- ssid="XXX"
- proto=WPA
- key_mgmt=WPA-PSK
- pairwise=TKIP
- group=TKIP
- psk="ASSWORD"
- } ; U5 t9 p4 M9 q9 y
4 p' `' r/ k1 r( S0 Z4 _7 u$ ^5 X
! P3 I- F, Y( M8 i/ {/ `其中XXX是路由器的热点名字, psk填写Password, 加密方式TKIP需要根据实际情况填写,不明白可以看我以前的文章,或者直接man。$ O3 Y# |$ n" U4 s9 n# V( O1 r6 C
运行先创建一个runtime目录: [plain] view plaincopy
4 {" V2 Y6 ?- ]: f% d! w
( A1 s) E+ H* Z( O" Q5 k2 W2 @' N4 \) H% \4 k* J. W9 E5 h6 J
- root@(none):/# mkdir /var/run/wpa_supplicant
& w8 l* O7 |1 \& H5 c2 ` $ W4 ~* K5 U, s+ H& ~/ Y8 q
& G) h0 M) Z% @: a% q
然后直接在后台运行:2 w% ~+ T6 k9 s1 ~) G O
[plain] view plaincopy
9 d' J& N; U8 k, u {0 ~3 ^9 u3 j; U9 @! [" }2 N
9 `$ c; g7 Q5 I& n* C: ?( X6 H- root@(none):/# wpa_supplicant -B -iwlan0 -c /etc/wpa.conf
- Successfully initialized wpa_supplicant
- rfkill: Cannot open RFKILL contro[ 172.506937] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin'
- l device
- [ 172.527112] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29
- [ 173.083412] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
- root@(none):/# [ 174.937567] wlan0: authenticate with bc:d1:77:a0:4f:3c
- [ 175.073446] wlan0: send auth to bc:d1:77:a0:4f:3c (try 1/3)
- [ 175.082318] wlan0: authenticated
- [ 175.087051] rt2800usb 1-1.2.1:1.0 wlan0: disabling HT/VHT due to WEP/TKIP use
- [ 175.098735] wlan0: associate with bc:d1:77:a0:4f:3c (try 1/3)
- [ 175.108018] wlan0: RX AssocResp from bc:d1:77:a0:4f:3c (capab=0x411 status=0 aid=5)
- [ 175.129960] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
- [ 175.136678] wlan0: associated
- [ 176.069997] IPv6: wlan0: IPv6 duplicate address fe80::7edd:90ff:feb2:73b1 detected!
6 G/ ^9 y, X- D p3 i) D
" ^* M9 v2 N4 K# S4 N* s+ U# o
( o# G. t5 \3 z s2 I( j9 i* q验证
' _) H- R* X% g使用wpa_cli看查看连接的状态
4 \3 K& g. u6 y6 A. @% D" K _) J [plain] view plaincopy
7 N# H6 `+ Y# Y# Z3 I1 d \2 `/ o- E; G
$ Z; M: d1 c2 ]: g) q% {& \9 l! j- root@(none):/# wpa_cli status
- Selected interface 'wlan0'
- bssid=bc:d1:77:a0:4f:3c
- freq=2412
- ssid=XXX
- id=0
- mode=station
- pairwise_cipher=TKIP
- group_cipher=TKIP
- key_mgmt=WPA-PSK
- wpa_state=COMPLETED
- address=7c:dd:90:b2:73:b1
- uuid=1e82e362-f927-544e-aa4d-1a229533944c * D& \* ~( k( x3 F8 W6 u7 e1 v
# P7 {9 m3 \; u( W+ V
status为COMPLETED那么表示连接上了, 然后我们获取IP地址, 并尝试ping国内的某个网站:) v/ h( `+ E4 I ~2 T: }
[plain] view plaincopy
$ O2 K! {9 L- a4 b& {8 U# `& k- D& g; e5 ^2 Q7 B, l% l
4 @2 S# n4 `3 K- root@(none):/# udhcpc -i wlan0
- udhcpc (v1.24.1) started
- Sending discover...
- Sending select for 192.168.1.112...
- Lease of 192.168.1.112 obtained, lease time 86400
- /etc/udhcpc.d/50default: Adding DNS 192.168.1.1
- /etc/udhcpc.d/50default: Adding DNS 0.0.0.0
-
- root@(none):/# ping meitu.com
- PING meitu.com (42.62.69.156): 56 data bytes
- 64 bytes from 42.62.69.156: seq=0 ttl=42 time=44.499 ms
- 64 bytes from 42.62.69.156: seq=1 ttl=42 time=44.956 ms
- 64 bytes from 42.62.69.156: seq=2 ttl=42 time=43.122 ms
- 64 bytes from 42.62.69.156: seq=3 ttl=42 time=43.387 ms
- 64 bytes from 42.62.69.156: seq=4 ttl=42 time=46.467 ms
- 64 bytes from 42.62.69.156: seq=5 ttl=42 time=46.267 ms
- 64 bytes from 42.62.69.156: seq=6 ttl=42 time=43.843 ms
- ^C
- --- meitu.com ping statistics ---
- 7 packets transmitted, 7 packets received, 0% packet loss
- round-trip min/avg/max = 43.122/44.648/46.467 ms
- g7 _/ p1 b4 Z* c" C
; L: G: _# A0 Y2 N0 P7 A! X# \: Y至此, 我们就完成了基本的配置工作。
- ?& S( z! n1 Y* `! ?% ?4 l
2 ~8 k) o, S5 L, ]4 L0 i& B- t' v+ o. C% ]
! n$ Y" P+ R" F1 w$ x7 }6 K, w. L$ N) {本文链接:https://www.ngui.cc/el/1322000.html
$ D- K9 f) I( s5 |% E3 l, p& Y9 P: ^# E
|