我想用 Ubuntu 16.04.6 LTS 创建一个 WiFi 接入点，hostapd这款 PCIe WiFi 卡支持 802.11a/b/g/n：
Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)
您将在下面找到命令 iw list 的结果
Wiphy phy0
max # scan SSIDs: 4
max scan IEs length: 2257 bytes
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports RSN-IBSS.
Device supports AP-side u-APSD.
Device supports T-DLS.
Supported Ciphers:
* WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5)
* TKIP (00-0f-ac:2)
* CCMP (00-0f-ac:4)
* 00-0f-ac:10
* GCMP (00-0f-ac:8)
* 00-0f-ac:9
* CMAC (00-0f-ac:6)
* 00-0f-ac:13
* 00-0f-ac:11
* 00-0f-ac:12
Available Antennas: TX 0x3 RX 0x3
Configured Antennas: TX 0x3 RX 0x3
Supported interface modes:
* IBSS
* managed
* AP
* AP/VLAN
* monitor
* mesh point
* P2P-client
* P2P-GO
* Unknown mode (11)
Band 1:
Capabilities: 0x11ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT TX/RX MCS rate indexes supported: 0-15
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 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) (no IR)
* 2472 MHz [13] (20.0 dBm) (no IR)
* 2484 MHz [14] (disabled)
Band 2:
Capabilities: 0x11ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT TX/RX MCS rate indexes supported: 0-15
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:
* 5180 MHz [36] (18.0 dBm) (no IR)
* 5200 MHz [40] (18.0 dBm) (no IR)
* 5220 MHz [44] (18.0 dBm) (no IR)
* 5240 MHz [48] (18.0 dBm) (no IR)
* 5260 MHz [52] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5280 MHz [56] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5300 MHz [60] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5320 MHz [64] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5500 MHz [100] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5520 MHz [104] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5540 MHz [108] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5560 MHz [112] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5580 MHz [116] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5600 MHz [120] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5620 MHz [124] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5640 MHz [128] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5660 MHz [132] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5680 MHz [136] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5700 MHz [140] (18.0 dBm) (no IR, radar detection)
DFS state: usable (for 1656 sec)
DFS CAC time: 60000 ms
* 5745 MHz [149] (disabled)
* 5765 MHz [153] (disabled)
* 5785 MHz [157] (disabled)
* 5805 MHz [161] (disabled)
* 5825 MHz [165] (disabled)
Supported commands:
* new_interface
* set_interface
* new_key
* start_ap
* new_station
* new_mpath
* set_mesh_config
* set_bss
* authenticate
* associate
* deauthenticate
* disassociate
* join_ibss
* join_mesh
* remain_on_channel
* set_tx_bitrate_mask
* frame
* frame_wait_cancel
* set_wiphy_netns
* set_channel
* set_wds_peer
* tdls_mgmt
* tdls_oper
* probe_client
* set_noack_map
* register_beacons
* start_p2p_device
* set_mcast_rate
* connect
* disconnect
* channel_switch
* Unknown command (104)
* Unknown command (121)
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
* AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* mesh point: 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
* P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
Supported RX frame types:
* IBSS: 0x40 0xb0 0xc0 0xd0
* managed: 0x40 0xd0
* AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* mesh point: 0xb0 0xc0 0xd0
* P2P-client: 0x40 0xd0
* P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-device: 0x40 0xd0
WoWLAN support:
* wake up on disconnect
* wake up on magic packet
* wake up on pattern match, up to 14 patterns of 1-256 bytes,
maximum packet offset 0 bytes
software interface modes (can always be added):
* AP/VLAN
* monitor
valid interface combinations:
* #{ managed } <= 2048, #{ AP, mesh point } <= 8, #{ P2P-client, P2P-GO } <= 1,
total <= 2048, #channels <= 1, STA/AP BI must match
HT Capability overrides:
* MCS: ff ff ff ff ff ff ff ff ff ff
* maximum A-MSDU length
* supported channel width
* short GI for 40 MHz
* max A-MPDU length exponent
* min MPDU start spacing
Device supports TX status socket option.
Device supports HT-IBSS.
Device supports SAE with AUTHENTICATE command
Device supports low priority scan.
Device supports scan flush.
Device supports AP scan.
Device supports per-vif TX power setting
P2P GO supports CT window setting
Driver supports full state transitions for AP/GO clients
Driver supports a userspace MPM
Device supports active monitor (which will ACK incoming frames)
Driver/device bandwidth changes during BSS lifetime (AP/GO mode)
我已经写了以下 hostapd.conf
#the interface used by the AP
interface=wlan_local
# "a" simply means 5GHz
hw_mode=a
# the channel to use, 0 means the AP will search for the channel with the least interferences (ACS)
channel=40
ieee80211d=1
country_code=FR
ieee80211n=1
# 802.11ac support
ieee80211ac=1
wmm_enabled=1
ssid=MYSSID
auth_algs=1
wpa=2
wpa_key_mgmt=WPA-PSK
rsn_pairwise=CCMP
wpa_passphrase=MYPASSWORD
我尝试了从 0 到 40 的不同通道，但启动服务 hostapd 时仍然出现以下消息
hostapd[1937]: wlan_local: IEEE 802.11 Configured channel (40) not found from the channel list of current mode (2) IEEE 802.11a
hostapd[1937]: wlan_local: IEEE 802.11 Hardware does not support configured channel
您有什么想法吗？谢谢
答案1
我使用频道 153，效果很好。见下图：
