我在 Linux 2.6 上使用 USB 无线适配器 (RT3070) 设置接入点时遇到问题。我尝试了以下步骤，但仍然无法从我的 iPhone 和 iPad 找到任何接入点。哪里出了问题？
步骤 0. 确认环境
环境是Ubuntu 10.04 LTS。
$ lsusb
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0411:01ee MelCo., Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ uname -r
2.6.32-38-generic
步骤 1. 下载 Linux 驱动程序
从以下位置下载驱动程序http://www.mediatek.com/
2011_0719_RT3070_RT3370_RT5370_RT5372_Linux_STA_V2.5.0.3_DPO.bz2
步骤2.修改rtusb_dev_id.c
我添加了以下行common/rtusb_dev_id.c
{USB_DEVICE(0x0411,0x01EE)}, /* Buffalo WLI-UC-GNM2 */
#endif /* RT3070 */
步骤3.修改config.mk
我也改变了设置os/linux/config.mk
# Support Wpa_Supplicant
HAS_WPA_SUPPLICANT=y
# Support Native WpaSupplicant for Network Maganger
HAS_NATIVE_WPA_SUPPLICANT_SUPPORT=y
步骤4.复制RT2870STA.dat
$sudo cp RT2870STA.dat /etc/Wireless/RT2870STA/RT2870STA.dat
步骤5. 构建驱动程序并安装
$sudo make
$sudo make install
进入os/linux/目录。
$sudo insmod rt5370sta.ko
$ lsmod | grep rt
rt5370sta 717049 0
gameport 9089 1 snd_ens1371
parport_pc 25962 1
agpgart 31724 1 intel_agp
parport 32635 3 ppdev,parport_pc,lp
scsi_transport_spi 21096 1 mptspi
步骤 6. 启用适配器
插入我的 USB 无线适配器（Buffalo WLI-UC-GNM2）。
$ifconfig -a
ra0 Link encap:Ethernet HWaddr 10:6f:3f:46:ea:02
inet6 addr: fe80::126f:3fff:fe46:ea02/64 Scope:Link
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)
$sudo ifconfig ra0 up
$iwconfig
ra0 Ralink STA ESSID:"11n-AP" Nickname:"RT2870STA"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Bit Rate:1 Mb/s
RTS thr:off Fragment thr:off
Link Quality=10/100 Signal level:0 dBm Noise level:0 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
步骤 7. 尝试扫描接入点
尝试让无线适配器作为wifi客户端来扫描wifi接入点。
$ sudo iwconfig ra0 mode Monitor
$ iwconfig
ra0 Ralink STA ESSID:"" Nickname:"RT2870STA"
Mode:Monitor Frequency=2.412 GHz Access Point: 7A:43:85:D5:62:85
Bit Rate=150 Mb/s
RTS thr:off Fragment thr:off
Link Quality=100/100 Signal level:0 dBm Noise level:0 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
$ iwlist scan
ra0 Scan completed :
Cell 01 - Address: 00:19:C8:04:XX:XX
Protocol:802.11b/g/n
ESSID:"XXXXXXXXXXXXXX"
Mode:Managed
Frequency:2.412 GHz (Channel 1)
Quality=52/100 Signal level=-69 dBm Noise level=-92 dBm
Encryption key:on
Bit Rates:54 Mb/s
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : PSK
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: DD0E0050F204104A0001101044000102
Cell 02 - Address: 9C:D2:4B:B6:XX:XX
Protocol:802.11b/g
ESSID:"007Z_XXXXXXXXXXX"
Mode:Managed
Frequency:2.412 GHz (Channel 1)
Quality=100/100 Signal level=-27 dBm Noise level=-92 dBm
Encryption key:on
Bit Rates:54 Mb/s
IE: Unknown: DD0E0050F204104A0001101044000102
步骤 8. 尝试使适配器作为接入点工作（失败）
$ sudo iwconfig ra0 mode managed
$ sudo iwconfig ra0 ap 7A:43:85:D5:62:85
$ sudo iwconfig ra0 key open
现在使用 iPhone 和 iPad 检查可用的 wifi 接入点。未找到接入点“11n-AP”。
$ iwconfig
ra0 Ralink STA ESSID:"11n-AP" Nickname:"RT2870STA"
Mode:Auto Frequency=2.412 GHz Access Point: 7A:43:85:D5:62:85
Bit Rate=1 Mb/s
RTS thr:off Fragment thr:off
Link Quality=100/100 Signal level:0 dBm Noise level:0 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
$ dmesg
[ 5568.409472] #
[ 5568.492660] (Efuse for 3062/3562/3572) Size=0x2d [2d0-2fc]
[ 5572.655589] RTMP_TimerListAdd: add timer obj e0a7fa34!
[ 5572.655661] RTMP_TimerListAdd: add timer obj e0a7fa78!
[ 5572.655701] RTMP_TimerListAdd: add timer obj e0a7fabc!
[ 5572.655709] RTMP_TimerListAdd: add timer obj e0a7f9f0!
[ 5572.655713] RTMP_TimerListAdd: add timer obj e0a7f924!
[ 5572.655716] RTMP_TimerListAdd: add timer obj e0a7f968!
[ 5572.655719] RTMP_TimerListAdd: add timer obj e0a4a50c!
[ 5572.655722] RTMP_TimerListAdd: add timer obj e0a39de4!
[ 5572.655725] RTMP_TimerListAdd: add timer obj e0a39e30!
[ 5572.655728] RTMP_TimerListAdd: add timer obj e0a4a5ec!
[ 5572.655731] RTMP_TimerListAdd: add timer obj e0a4a484!
[ 5572.655735] RTMP_TimerListAdd: add timer obj e0a4a5a4!
[ 5572.687769] -->RTUSBVenderReset
[ 5572.689754] <--RTUSBVenderReset
[ 5580.819692] CfgSetCountryRegion():CountryRegion in eeprom was programmed
[ 5580.819733] CfgSetCountryRegion():CountryRegion in eeprom was programmed
[ 5580.821541] Key1Str is Invalid key length(0) or Type(0)
[ 5580.821588] Key2Str is Invalid key length(0) or Type(0)
[ 5580.821633] Key3Str is Invalid key length(0) or Type(0)
[ 5580.821679] Key4Str is Invalid key length(0) or Type(0)
[ 5580.823475] 1. Phy Mode = 5
[ 5580.823481] 2. Phy Mode = 5
[ 5580.824160] NVM is Efuse and its size =2d[2d0-2fc]
[ 5581.732646] phy mode> Error! The chip does not support 5G band 5!
[ 5581.732732] RTMPSetPhyMode: channel is out of range, use first channel=1
[ 5581.791312] (Efuse for 3062/3562/3572) Size=0x2d [2d0-2fc]
[ 5582.157269] 3. Phy Mode = 9
[ 5582.197224] AntCfgInit: primary/secondary ant 0/1
[ 5582.197228] MCS Set = ff 00 00 00 01
[ 5582.991471] <==== rt28xx_init, Status=0
[ 5583.015043] 0x1300 = 000a4300
[ 5588.900248] ===>rt_ioctl_giwscan. 13(13) BSS returned, data->length = 1887
[ 5593.141191] ra0: no IPv6 routers present
[ 5595.133167] ===>rt_ioctl_giwscan. 13(13) BSS returned, data->length = 1911
[ 5601.572219] ===>rt_ioctl_giwscan. 15(15) BSS returned, data->length = 2173
[ 5606.928392] ===>rt_ioctl_giwscan. 15(15) BSS returned, data->length = 2173
[ 5636.958410] ===>rt_ioctl_giwscan. 17(17) BSS returned, data->length = 2399
[ 5660.642092] #