USB-WIFI RTL8188CU模組驅動

阿新 • • 發佈：2019-02-14

RTL8188CU模組概述

Realtek的8188cu模組WiFi是通過usb介面掛載裝置。以下是我對模組使用的所有開發工作。

Linux核心驅動適配和編譯

由於晶片驅動官方已經最高支援kernel Linux3.9版本、在對Linux3.14進行移植時出現較多問題。期間出現了很多的坑。

核心配置：

進入核心目錄，make menuconfig [*] Networking support —> [*] Wireless —>

Device Drivers —>
[*] Network device support —>
Wireless LAN —>
[*] Wireless LAN (IEEE 802.11)

<*> IEEE 802.11 for Host AP (Prism2/2.5/3 and WEP/TKIP/CCMP)

原始碼移植後、出現此選項

原始碼編譯：

解壓原始碼到kernel目錄

tar -xvf rtl8188C_8192C_usb_linux_v4.0.2_9000.20130911.tar.gz

移動到核心檔案中
mv rtl8188C_8192C_usb_linux_v4.0.2_9000.20130911 sbc/am3352-sbc/src/am335x-linux-3.14.26/drivers/net/wireless/rtl8192cu

編譯出現的問題

直接make命令編譯問題一：os_dep/linux/os_intfs.c:320:3: error: implicit declaration of function ‘create_proc_entry’

原因：Linux 3.10版本中已經去除了create_proc_entry函式。解決方法：下載另一個檔案：wget https://raw.github.com/raspberrypi/linux/rpi-3.10.y/drivers/net/wireless/rtl8192cu/os_dep/linux/os_intfs.c，將下載到的檔案覆蓋原來的os_dep/linux/os_intfs.c。問題二：在編譯驅動的時候，出現錯誤macro "__TIME__" might prevent reproducible builds [-Werror=date-time]，解決辦法只需在相應的Makefile中新增EXTRA_CFLAGS +=-Wno-error=date-time (不把該行為當成錯誤)

或者EXTRA_CFLAGS +=-Wno-date-time(不把該行為當成警告)便可解決該警告或者錯誤。問題三：ERROR: "wireless_send_event" [drivers/net/wireless/rtl8192cu/8192cu.ko] undefined!解決辦法：[*] Wireless LAN (IEEE 802.11) <*> IEEE 802.11 for Host AP (Prism2/2.5/3 and WEP/TKIP/CCMP) 排除萬難、中與編譯成功生成驅動模組：8192cu.ko

無線工具tool編譯移植：

wpa_supplicant是wifi客戶端（client）加密認證工具，和iwconfig不同，wpa_supplicant支援wep、wpa、wpa2等完整的加密認證，而iwconfig只能支援wep。和wpa_supplocant相對應的，ap端的加密認證工具為hostapd。

iwconfig配置wep模式連線WiFi

解壓工具原始碼安裝包tar -xvf wireless_tools.30.rtl.tar.gz更改交叉編譯工具

編譯生成可執行檔案

在開發板上進行配置

[email protected]:/mnt/wifi# ifconfig
eth0 Link encap:Ethernet HWaddr 26:C7:3D:A0:40:61
inet addr:192.168.1.147 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2294 errors:0 dropped:2 overruns:0 frame:0
TX packets:51 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:169639 (165.6 KiB) TX bytes:5634 (5.5 KiB)
Interrupt:56
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 B) TX bytes:700 (700.0 B)
[email protected]:/mnt/wifi# ls
8192cu.ko iwconfig iwevent iwgetid iwlist iwpriv iwspy

新增驅動

[email protected]:/mnt/wifi# insmod 8192cu.ko
[ 960.694600] rtl8192cu driver version=v4.0.2_9000.20130911
[ 960.700314] build time: Jan 24 2018 20:22:31
[ 960.706246]
[ 960.706246] usb_endpoint_descriptor(0):
[ 960.711844] bLength=7
[ 960.714309] bDescriptorType=5
[ 960.717430] bEndpointAddress=81
[ 960.720725] wMaxPacketSize=200
[ 960.723962] bInterval=0
[ 960.726529] RT_usb_endpoint_is_bulk_in = 1
[ 960.730835]
[ 960.730835] usb_endpoint_descriptor(1):
[ 960.736432] bLength=7
[ 960.738815] bDescriptorType=5
[ 960.741931] bEndpointAddress=2
[ 960.745151] wMaxPacketSize=200
[ 960.748356] bInterval=0
[ 960.750929] RT_usb_endpoint_is_bulk_out = 2
[ 960.755333]
[ 960.755333] usb_endpoint_descriptor(2):
[ 960.760915] bLength=7
[ 960.763312] bDescriptorType=5
[ 960.766426] bEndpointAddress=3
[ 960.769632] wMaxPacketSize=200
[ 960.772846] bInterval=0
[ 960.775418] RT_usb_endpoint_is_bulk_out = 3
[ 960.779807]
[ 960.779807] usb_endpoint_descriptor(3):
[ 960.785401] bLength=7
[ 960.787788] bDescriptorType=5
[ 960.790899] bEndpointAddress=84
[ 960.794331] wMaxPacketSize=40
[ 960.797453] bInterval=1
[ 960.800022] RT_usb_endpoint_is_int_in = 4, Interval = 1
[ 960.805534] nr_endpoint=4, in_num=2, out_num=2
[ 960.805534]
[ 960.811752] USB_SPEED_HIGH
[ 960.815172] CHIP TYPE: RTL8188C_8192C
[ 960.819076] register rtw_netdev_ops to netdev_ops
[ 960.824222] Chip Version ID: VERSION_NORMAL_TSMC_CHIP_88C.
[ 960.829991] RF_Type is 3!!
[ 960.836642] EEPROM type is E-FUSE
[ 960.840135] ====> ReadAdapterInfo8192C
[ 960.844372] Boot from EFUSE, Autoload OK !
[ 960.922000] EEPROMVID = 0x0bda
[ 960.925234] EEPROMPID = 0x8176
[ 960.928442] EEPROMCustomerID : 0x00
[ 960.932102] EEPROMSubCustomerID: 0x00
[ 960.935961] RT_CustomerID: 0x00
[ 960.939266] _ReadMACAddress MAC Address from EFUSE = 00:1d:43:30:1b:fc
[ 960.946139] EEPROMRegulatory = 0x0
[ 960.949710] _ReadBoardType(0)
[ 960.952847] BT Coexistance = disable
[ 960.956603] mlmepriv.ChannelPlan = 0x02
[ 960.960635] _ReadPSSetting...bHWPwrPindetect(0)-bHWPowerdown(0) ,bSupportRemoteWakeup(0)
[ 960.969147] ### PS params=> power_mgnt(1),usbss_enable(0) ###
[ 960.975289] ### AntDivCfg(0)
[ 960.978310] readAdapterInfo_8192CU(): REPLACEMENT = 1
[ 960.983627] <==== ReadAdapterInfo8192C in 150 ms
[ 960.989728] rtw_macaddr_cfg MAC Address = 00:1d:43:30:1b:fc
[ 960.995732] bDriverStopped:1, bSurpriseRemoved:0, bup:0, hw_init_completed:0
[ 961.008437] _rtw_drv_register_netdev, MAC Address (if1) = 00:1d:43:30:1b:fc
[ 961.020251] usbcore: registered new interface driver rtl8192cu
[email protected]:/mnt/wifi# ifconfig
eth0 Link encap:Ethernet HWaddr 26:C7:3D:A0:40:61
inet addr:192.168.1.147 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9567 errors:0 dropped:2 overruns:0 frame:0
TX packets:3781 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11071491 (10.5 MiB) TX bytes:268210 (261.9 KiB)
Interrupt:56 lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 B) TX bytes:700 (700.0 B)

啟動網絡卡

[email protected]:/mnt/wifi# ifconfig wlan0 up
[ 1002.603095] +871x_drv - drv_open, bup=0
[ 1002.610055] ===> FirmwareDownload91C() fw:Rtl819XFwImageArray_TSMC
[ 1002.616726] FirmwareDownload92C accquire FW from embedded image
[ 1002.622978] fw_ver=v88, fw_subver=2, sig=0x88c0
[ 1002.649241] fw download ok!
[ 1002.652205] Set RF Chip ID to RF_6052 and RF type to 1T1R.
[ 1002.966153] IQK:Start!!!
[ 1002.975077] Path A Rx IQK fail!!
[ 1002.980110] Path A IQK Success!!
[ 1002.988366] Path A Rx IQK fail!!
[ 1002.993931] Path A IQK Success!!
[ 1002.999644] IQK: final_candidate is 0
[ 1003.003565] IQK: RegE94=104 RegE9C=15 RegEA4=ff RegEAC=1 RegEB4=0 RegEBC=0 RegEC4=0 RegECC=0
Path A IQ Calibration Success !
[ 1003.124495] pdmpriv->TxPowerTrackControl = 1
[ 1003.131213] rtl8192cu_hal_init in 520ms
[ 1003.155214] MAC Address = 00:1d:43:30:1b:fc
[ 1003.160049] -871x_drv - drv_open, bup=1
[email protected]:/mnt/wifi# [ 1005.155132] ==>rtw_ps_processor .fw_state(0)
[ 1005.159654] ==>ips_enter cnts:1
[ 1005.163013] ===> rtw_ips_pwr_down...................
[ 1005.169992] ====> rtw_ips_dev_unload...
[ 1005.191302] usb_read_port_cancel
[ 1005.195138] usb_read_port_complete()-1284: RX Warning! bDriverStopped(0) OR bSurpriseRemoved(0) bReadPortCancel(1)
[ 1005.206415] usb_read_port_complete()-1284: RX Warning! bDriverStopped(0) OR bSurpriseRemoved(0) bReadPortCancel(1)
[ 1005.217664] usb_read_port_complete()-1284: RX Warning! bDriverStopped(0) OR bSurpriseRemoved(0) bReadPortCancel(1)
[ 1005.228893] usb_read_port_complete()-1284: RX Warning! bDriverStopped(0) OR bSurpriseRemoved(0) bReadPortCancel(1)
[ 1005.239957] usb_write_port_cancel
[ 1005.244091] ==> rtl8192cu_hal_deinit
[ 1005.247950] bkeepfwalive(0)
[ 1005.250883] card disble without HWSM...........
[ 1005.259031] <=== rtw_ips_pwr_down..................... in 90ms[email protected]:/mnt/wifi# ifconfig
eth0 Link encap:Ethernet HWaddr 26:C7:3D:A0:40:61
inet addr:192.168.1.147 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9634 errors:0 dropped:2 overruns:0 frame:0
TX packets:3783 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11077353 (10.5 MiB) TX bytes:268336 (262.0 KiB)
Interrupt:56 lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 B) TX bytes:700 (700.0 B)wlan0 Link encap:Ethernet HWaddr 00:1D:43:30:1B:FC
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

搜尋周圍WiFi AP點

[email protected]:/mnt/wifi# ifconfig wlan0 192.168.1.166
[email protected]:/mnt/wifi# ./iwlist wlan0 scanning
[ 1251.243269] _rtw_pwr_wakeup call ips_leave....
[ 1251.247992] ==>ips_leave cnts:1
[ 1251.251292] ===> rtw_ips_pwr_up..............
[ 1251.256064] ===> ips_netdrv_open.........
[ 1251.264501] ===> FirmwareDownload91C() fw:Rtl819XFwImageArray_TSMC
[ 1251.271108] FirmwareDownload92C accquire FW from embedded image
[ 1251.277517] fw_ver=v88, fw_subver=2, sig=0x88c0
[ 1251.303432] fw download ok!
[ 1251.306388] Set RF Chip ID to RF_6052 and RF type to 1T1R.
[ 1251.626253] IQK:Start!!!
[ 1251.635242] Path A Rx IQK fail!!
[ 1251.640332] Path A Rx IQK fail!!
[ 1251.643774] Path A IQK Only Tx Success!!
[ 1251.652991] Path A Rx IQK fail!!
[ 1251.658083] Path A Rx IQK fail!!
[ 1251.661478] Path A IQK Only Tx Success!!
[ 1251.668513] IQK: final_candidate is 0
[ 1251.672379] IQK: RegE94=104 RegE9C=14 RegEA4=0 RegEAC=0 RegEB4=0 RegEBC=0 RegEC4=0 RegECC=0
Path A IQ Calibration Success !
[ 1251.685692] _PHY_PathAFillIQKMatrix only Tx OK
[ 1251.794453] pdmpriv->TxPowerTrackControl = 1
[ 1251.801205] rtl8192cu_hal_init in 540ms
[ 1251.825412] <=== rtw_ips_pwr_up.............. in 580ms
[ 1251.830990] ==> ips_leave.....LED(0x00028080)...
[ 1253.135544] survey done event(12) band:0 for wlan0
wlan0 Scan completed :
Cell 01 - Address: 00:6B:8E:F1:6F:70
ESSID:"@PHICOMM_68"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.427 GHz (Channel 4)
Encryption key:on
Bit Rates:300 Mb/s
Extra:wpa_ie=dd1a0050f20101000050f20202000050f2020050f20401000050f202
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
Extra:rsn_ie=30180100000fac020200000fac02000fac040100000fac020000
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
Quality=58/100 Signal level=57/100
Cell 02 - Address: B0:95:8E:5A:1C:18
ESSID:"huchengwei"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.437 GHz (Channel 6)
Encryption key:on
Bit Rates:300 Mb/s
Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Quality=0/100 Signal level=10/100
Cell 03 - Address: EC:26:CA:41:63:FD
ESSID:"deutschwerkstatt"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.437 GHz (Channel 6)
Encryption key:on
Bit Rates:144 Mb/s
Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Quality=0/100 Signal level=23/100
Cell 04 - Address: DC:FE:18:14:74:BE
ESSID:"YATIGERS-2.4G"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.462 GHz (Channel 11)
Encryption key:on
Bit Rates:300 Mb/s
Extra:wpa_ie=dd1a0050f20101000050f20202000050f2020050f20401000050f202
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
Extra:rsn_ie=30180100000fac020200000fac02000fac040100000fac020000
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
Quality=66/100 Signal level=82/100

連線WiFi

[email protected]:/mnt/wifi# ./iwconfig wlan0 key YTGS25257758
Error for wireless request "Set Encode" (8B2A) :
invalid argument "YTGS25257758".
[email protected]:/mnt/wifi# ./iwconfig wlan0 essid "YATIGERS-2.4G"
[ 1421.483915] _rtw_pwr_wakeup call ips_leave....
[ 1421.488626] ==>ips_leave cnts:2
[ 1421.491926] ===> rtw_ips_pwr_up..............
[ 1421.496744] ===> ips_netdrv_open.........
[ 1421.505563] ===> FirmwareDownload91C() fw:Rtl819XFwImageArray_TSMC
[ 1421.512173] FirmwareDownload92C accquire FW from embedded image
[ 1421.518589] fw_ver=v88, fw_subver=2, sig=0x88c0
[ 1421.544544] fw download ok!
[ 1421.547499] Set RF Chip ID to RF_6052 and RF type to 1T1R.
[ 1421.866093] IQK:Start!!!
[ 1421.875145] Path A IQK Success!!
[ 1421.883112] Path A Rx IQK fail!!
[ 1421.888205] Path A Rx IQK fail!!
[ 1421.891601] Path A IQK Only Tx Success!!
[ 1421.902763] Path A IQK Success!!
[ 1421.908461] IQK: final_candidate is 0
[ 1421.912331] IQK: RegE94=104 RegE9C=14 RegEA4=ff RegEAC=0 RegEB4=0 RegEBC=0 RegEC4=0 RegECC=0
Path A IQ Calibration Success !
[ 1422.034466] pdmpriv->TxPowerTrackControl = 1
[ 1422.041203] rtl8192cu_hal_init in 540ms
[ 1422.065457] <=== rtw_ips_pwr_up.............. in 580ms
[ 1422.071035] ==> ips_leave.....LED(0x00028080)...
[ 1422.075945] =>rtw_wx_set_essid
[ 1422.079158] ssid=YATIGERS-2.4G, len=13
[ 1422.083503] Set SSID under fw_state=0x00000008
[ 1422.088213] [by_bssid:0][assoc_ssid:YATIGERS-2.4G][to_roaming:0] new candidate: YATIGERS-2.4G(dc:fe:18:14:74:be, ch11) rssi:-58
[ 1422.100317] rtw_select_and_join_from_scanned_queue: candidate: YATIGERS-2.4G(dc:fe:18:14:74:be, ch:11)
[ 1422.110203] link to Ralink AP
[ 1422.113385] <=rtw_wx_set_essid, ret 0
[email protected]:/mnt/wifi# [ 1422.121616] set ch/bw before connected
[ 1422.125868] start_join_set_ch_bw: ch=11, bwmode=1, ch_offset=2
[ 1422.217255] link to Ralink AP
[ 1422.267760] OnAuthClient
[ 1422.270479] network.SupportedRates[0]=82
[ 1422.274601] network.SupportedRates[1]=84
[ 1422.278719] network.SupportedRates[2]=8B
[ 1422.282836] network.SupportedRates[3]=96
[ 1422.286954] network.SupportedRates[4]=12
[ 1422.291070] network.SupportedRates[5]=24
[ 1422.295188] network.SupportedRates[6]=48
[ 1422.299305] network.SupportedRates[7]=6C
[ 1422.303422] network.SupportedRates[8]=0C
[ 1422.307540] network.SupportedRates[9]=18
[ 1422.311658] network.SupportedRates[10]=30
[ 1422.315866] network.SupportedRates[11]=60
[ 1422.320079] bssrate_len = 12
[ 1422.342232] OnAssocRsp
[ 1422.344765] report_join_res(4)
[ 1422.348014] rtw_joinbss_update_network
[ 1422.351961] +rtw_update_ht_cap()
[ 1422.355382] rtw_joinbss_update_stainfo
[ 1422.359619] OnAction_back
[ 1422.362388] OnAction_back, action=0
[ 1422.366117] issue_action_BA, category=3, action=1, status=0
[ 1422.372152] HW_VAR_BASIC_RATE: BrateCfg(0x15d)
[ 1422.379523] WMM(0): 0, a42b
[ 1422.382886] WMM(1): 0, a44f
[ 1422.385902] WMM(2): 0, 5e4322
[ 1422.389088] WMM(3): 0, 2f3222
[ 1422.392211] HTOnAssocRsp
[ 1422.398868] update raid entry, mask=0xfffff, arg=0x80
[ 1422.405371] rtl8192c_set_FwJoinBssReport_cmd mstatus(1)
[ 1422.411380] SetFwRsvdPagePkt
[ 1422.415505] Set RSVD page location to Fw.
[ 1422.420276] =>mlmeext_joinbss_event_callback
[ 1427.075863] rtl8192c_dm_RF_Saving(): RF_Save
[ 1431.072987] rtw_set_ps_mode(): Enter 802.11 power save mode...
[ 1431.079829] rtl8192c_dm_RF_Saving(): RF_Normal
[ 1431.084564] rtl8192c_set_FwPwrMode_cmd(): Mode = 1, SmartPS = 2
[email protected]:/mnt/wifi# ./iwconfig wlan0
[ 1499.280772] rtw_wx_get_rts, rts_thresh=2347
[ 1499.286239] rtw_wx_get_frag, frag_len=2346
wlan0 IEEE 802.11bgn ESSID:"YATIGERS-2.4G" Nickname:"<[email protected]>"
Mode:Managed Frequency:2.462 GHz Access Point: DC:FE:18:14:74:BE
Bit Rate:150 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=99/100 Signal level=67/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

遮蔽eth0來試著ping閘道器

[email protected]:/mnt/wifi# ./iwconfig wlan0
[ 1499.280772] rtw_wx_get_rts, rts_thresh=2347
[ 1499.286239] rtw_wx_get_frag, frag_len=2346
wlan0 IEEE 802.11bgn ESSID:"YATIGERS-2.4G" Nickname:"<[email protected]>"
Mode:Managed Frequency:2.462 GHz Access Point: DC:FE:18:14:74:BE
Bit Rate:150 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=99/100 Signal level=67/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0[email protected]:/mnt/wifi# ifconfig
eth0 Link encap:Ethernet HWaddr 26:C7:3D:A0:40:61
inet addr:192.168.1.147 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10239 errors:0 dropped:7 overruns:0 frame:0
TX packets:3881 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11213377 (10.6 MiB) TX bytes:278688 (272.1 KiB)
Interrupt:56 lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 B) TX bytes:700 (700.0 B)wlan0 Link encap:Ethernet HWaddr 00:1D:43:30:1B:FC
inet addr:192.168.1.166 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:335 errors:0 dropped:339 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:40400 (39.4 KiB) TX bytes:0 (0.0 B)[email protected]:/mnt/wifi# ifconfig eth0 down
[email protected]:/mnt/wifi# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 B) TX bytes:700 (700.0 B)wlan0 Link encap:Ethernet HWaddr 00:1D:43:30:1B:FC
inet addr:192.168.1.166 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:375 errors:0 dropped:379 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:45253 (44.1 KiB) TX bytes:0 (0.0 B)[email protected]:/mnt/wifi# ping 192.168.1.1
[ 1606.213877] rtw_set_ps_mode(): Busy Traffic , Leave 802.11 power save..
[ 1606.221047] rtl8192c_set_FwPwrMode_cmd(): Mode = 0, SmartPS = 0
[ 1606.227764] OnAction_back
[ 1606.230533] OnAction_back, action=0
[ 1606.234249] issue_action_BA, category=3, action=1, status=0
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: seq=0 ttl=64 time=26.190 ms
64 bytes from 192.168.1.1: seq=1 ttl=64 time=13.609 ms
64 bytes from 192.168.1.1: seq=2 ttl=64 time=9.448 ms
64 bytes from 192.168.1.1: seq=3 ttl=64 time=13.246 ms
64 bytes from 192.168.1.1: seq=4 ttl=64 time=19.149 ms
64 bytes from 192.168.1.1: seq=5 ttl=64 time=25.671 ms
64 bytes from 192.168.1.1: seq=6 ttl=64 time=15.957 ms
--- 192.168.1.1 ping statistics ---
22 packets transmitted, 22 packets received, 0% packet loss
round-trip min/avg/max = 6.152/22.831/183.121 ms

用hostapd配置WiFi作為AP接入點

hostapd是一款執行在使用者態軟體，能夠為認證伺服器提供管理接入點。下面是無線網絡卡常見的工作模式及其作用。

顯然，平時我們的計算機的無線網絡卡一般工作在Managed模式，而我們平常使用的路由器的無線網絡卡則是一般工作在Master模式。我們藉助hostapd讓我們計算機的無線網絡卡更換模式，使其工作在Master模式，這樣我們的計算機就能夠成為一個無線接入點從而為其他裝置提供服務。

移植hostapd

libnl庫的安裝

    下載1.1版本的、libnl-1.1.4.tar.gz
    解壓
    tar -xvf libnl-1.1.4.tar.gz
    mkdir install
    配置安裝目錄
    ./configure -prefix=/home/fluency/workspace/wifi/libnl-1.1.4/install
    編譯
    make CC=arm-linux-gnuabihf-gcc
    make install

openssl庫的安裝

OpenSSL官網https://www.openssl.org/source/old/0.9.x/
    下載openssl-0.9.8e.tar.gz
    解壓配置
    tar -xvf openssl-0.9.8e.tar.gz
    mkdir install
    安裝目錄
    ./config -prefix=/home/fluency/workspace/wifi/openssl-0.9.8e/install/
    交叉編譯工具
    ./config os/compiler:arm-linux-gnueabihf-gcc
    make
    make install

hostapd的編譯

解壓配置

tar -xvf hostapd-0.8-snapshot.tar.gz

cp deconfig .config

vim .config

修改Makefile
指定libnl、ssl的標頭檔案和庫檔案路徑

關於Relocations in generic ELF (EM: 40)的解決辦法

然後命令編譯（指定編譯器和連線工具）
make CC=arm-linux-gnueabihf-gcc LD=arm-linux-gnueabihf-ld
移植
hostapd hostapd_cli 可執行檔案
執行中出現庫檔案缺失（進行cp）
[email protected]:~/workspace/wifi/libnl-1.1.4/install/lib$ cp libnl.so* /home/fluency/nfsboot/wifi/
sudo ln -s 原始檔目標檔案（為庫檔案建立連線）

命令執行AP設定

/*---------配置檔案AM335Wifi.conf----------------------*/
interface=wlan0
ssid=Fluency
channel=9
hw_mode=g
ignore_broadcast_ssid=0
auth_algs=1
wpa=3
wpa_passphrase=12345679
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
/*------------------------------------------*/
[email protected]:/mnt/wifi# ./hostapd ./AM335Wifi.conf -B
Configuration file: ./hostapAP.conf
drv->ifindex=4
l2_sock_recv==l2_sock_xmit=0x0x5[28441.760693] _rtw_pwr_wakeup call ips_leave....
2630
[28441.768844] ==>ips_leave cnts:3
[28441.772652] ===> rtw_ips_pwr_up..............
[28441.777335] ===> ips_netdrv_open.........
[28441.786126] ===> FirmwareDownload91C() fw:Rtl819XFwImageArray_TSMC
[28441.792915] FirmwareDownload92C accquire FW from embedded image
[28441.799145] fw_ver=v88, fw_subver=2, sig=0x88c0
[28441.824193] fw download ok!
[28441.827141] Set RF Chip ID to RF_6052 and RF type to 1T1R.
[28442.136384] IQK:Start!!!
[28442.145387] Path A IQK Success!!
[28442.153503] Path A IQK Success!!
[28442.159184] IQK: final_candidate is 0
[28442.163094] IQK: RegE94=104 RegE9C=14 RegEA4=ff RegEAC=1 RegEB4=0 RegEBC=0 RegEC4=0 RegECC=0
Path A IQ Calibration Success !
[28442.284387] pdmpriv->TxPowerTrackControl = 1
[28442.291139] rtl8192cu_hal_init in 510ms
[28442.315333] <=== rtw_ips_pwr_up.............. in 540ms
[28442.320912] ==> ips_leave.....LED(0x00028080)...
[28442.325816] set_mode = IW_MODE_MASTER
[28442.330516] hw_var_set_opmode()-4234 mode = 3
[28442.335576] rtw_hostapd_sta_flush
[28442.340158] rtw_sta_flush(wlan0)
[28442.343639] issue_deauth to ff:ff:ff:ff:ff:ff
+rtl871x_sta_deauth_ops, ff:ff:ff:ff:ff:ff is de[28442.349304] rtw_set_encryption
auth, reason=2
rtl871x_set_key_ops
[28442.356518] clear default encryption keys, keyid=0
rtl871x_set_key_ops
[28442.366165] rtw_set_encryption
[28442.371042] clear default encryption keys, keyid=1
rtl871x_set_key_ops
[28442.376983] rtw_set_encryption
[28442.381887] clear default encryption keys, keyid=2
rtl871x_set_key_ops
[28442.387511] rtw_set_encryption
[28442.392466] clear default encryption keys, keyid=3
Using interface wlan0 with hwaddr 00:1d:43:30:1b:fc and ssid 'YOUR_SSID'
rtl871x_set_wps_assoc_resp_ie
[28442.551185] rtw_set_wps_assoc_resp, len=14
rtl871x_set_wps_beacon_ie
[28442.558408] rtw_set_wps_beacon, len=14
rtl871x_set_wps_probe_resp_ie
[28442.564877] rtw_set_wps_probe_resp, len=14
rtl871x_set_key_ops
[28442.580558] rtw_set_encryption
[28442.585520] rtw_set_encryption, set group_key, TKIP
[28442.590653] set_group_key
[28442.594451] SetHwReg8192CU, 5126, RCR= 7000228e
rtl871x_set_beacon_ops
[28442.599478] rtw_set_beacon, len=105
[28442.605184] rtw_check_beacon_data, len=91
[28442.613419] CH=9, BW=0, offset=0
[28442.617047] HW_VAR_BASIC_RATE: BrateCfg(0x15d)
[28442.623180] update_bmc_sta, mask=0x6000000f, arg=0x81
rtl871x_set_hidden_ssid ignore_broadcast_ssid:0,[28442.628976] rtw_set_hidden_ssid(wlan0) ignore_broadcast_ssid:0, YOUR_SSID,9 YOUR_SSID,9rtl871x_set_acl
[28447.325844] rtl8192c_dm_RF_Saving(): RF_Normal
[28519.433519] IQK:Start!!!
[28519.442255] Path A IQK Success!!
[28519.451203] Path A IQK Success!!
[28519.457527] IQK: final_candidate is 0
[28519.461397] IQK: RegE94=103 RegE9C=11 RegEA4=fe RegEAC=2 RegEB4=0 RegEBC=0 RegEC4=0 RegECC=0

Path A IQ Calibration Success !

配置DHCP服務

[email protected]:/mnt/wifi#udhcpd ./udhcpd.conf
/*---------配置檔案udhcpd.conf----------------------*/
start 192.168.63.100
end 192.168.63.254
interface wlan0
opt dns 192.168.10.2 192.168.10.10
option subnet 255.255.255.0
opt router 192.168.63.70
opt wins 192.168.63.10
option dns 129.219.13.81 # appened to above DNS servers for a total of 3
option domain local

option lease 864000 # 10 days of seconds

/*------------------------------------------*/連線加入AP熱點 name為Fluencypasswd為12345679可以看到分配的ID為192.168.2.100

[email protected]:/mnt/wifi# ping 192.168.2.100PING 192.168.2.100 (192.168.2.100): 56 data bytes64 bytes from 192.168.2.100: seq=0 ttl=64 time=129.361 ms64 bytes from 192.168.2.100: seq=1 ttl=64 time=143.283 ms64 bytes from 192.168.2.100: seq=2 ttl=64 time=34.387 ms64 bytes from 192.168.2.100: seq=3 ttl=64 time=70.293 ms64 bytes from 192.168.2.100: seq=4 ttl=64 time=79.402 ms64 bytes from 192.168.2.100: seq=5 ttl=64 time=103.304 ms--- 192.168.2.100 ping statistics ---35 packets transmitted, 35 packets received, 0% packet lossround-trip min/avg/max = 24.044/76.401/150.222 ms到此RTL8188CU模組驅動的驅動所有功能都已完成新增到rc.local指令碼啟動

WiFi效能測試

用iperf命令啟動tcp伺服器

手機軟體netwroktool

然後server端就能看到測試頻寬資訊

以上完成對WiFi驅動的所有工作、裝置就有了一個無線網絡卡啦