Networking
Hostapd SSID 幾秒鐘後消失
我正在使用 hostapd 通過我的樹莓派零 w 內置 wifi 卡共享另一個 wifi 連接。樹莓派啟動後，我可以在手機中看到我的 SSID，甚至可以連接到它並使用它幾秒鐘。然後 SSID 就消失了。
hostapd 的狀態顯示沒有問題：
pi@raspberrypi:~ $ sudo service hostapd status ● hostapd.service - LSB: Advanced IEEE 802.11 management daemon Loaded: loaded (/etc/init.d/hostapd; generated; vendor preset: enabled) Active: active (running) since Sun 2018-08-05 16:55:06 UTC; 6min ago Docs: man:systemd-sysv-generator(8) Process: 557 ExecStart=/etc/init.d/hostapd start (code=exited, status=0/SUCCESS) CGroup: /system.slice/hostapd.service └─597 /usr/sbin/hostapd -B -P /run/hostapd.pid /etc/hostapd/hostapd.conf Aug 05 16:55:04 raspberrypi systemd[1]: Starting LSB: Advanced IEEE 802.11 management daemon... Aug 05 16:55:06 raspberrypi hostapd[557]: Starting advanced IEEE 802.11 management: hostapd. Aug 05 16:55:06 raspberrypi systemd[1]: Started LSB: Advanced IEEE 802.11 management daemon.這是我的 dmesg：
[ 9.951912] bcm2835_alsa bcm2835_alsa: card created with 8 channels [ 10.988983] brcmfmac: F1 signature read @0x18000000=0x1541a9a6 [ 11.023394] brcmfmac: brcmf_fw_map_chip_to_name: using brcm/brcmfmac43430-sdio.bin for chip 0x00a9a6(43430) rev 0x000001 [ 11.023812] usbcore: registered new interface driver brcmfmac [ 11.550743] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Oct 23 2017 03:55:53 version 7.45.98.38 (r674442 CY) FWID 01-e58d219f [ 11.551907] brcmfmac: brcmf_c_preinit_dcmds: CLM version = API: 12.2 Data: 7.11.15 Compiler: 1.24.2 ClmImport: 1.24.1 Creation: 2014-05-26 10:53:55 Inc Data: 9.10.39 Inc Compiler: 1.29.4 Inc ClmImport: 1.36.3 Creation: 2017-10-23 03:47:14 [ 12.469798] Indeed it is in host mode hprt0 = 00001101 [ 14.180038] uart-pl011 20201000.serial: no DMA platform data [ 14.366758] usb 1-1: reset high-speed USB device number 2 using dwc_otg [ 14.366994] Indeed it is in host mode hprt0 = 00001101 [ 16.080543] Adding 102396k swap on /var/swap. Priority:-2 extents:1 across:102396k SSFS [ 16.161385] mt7601u 1-1:1.0: ASIC revision: 76010001 MAC revision: 76010500 [ 16.252009] mt7601u 1-1:1.0: Warning: unsupported EEPROM version 0d [ 16.252028] mt7601u 1-1:1.0: EEPROM ver:0d fae:00 [ 16.771510] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht' [ 16.776815] usbcore: registered new interface driver mt7601u [ 18.456287] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 18.625722] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 18.625756] brcmfmac: power management disabled [ 18.753324] Bluetooth: Core ver 2.22 [ 18.753500] NET: Registered protocol family 31 [ 18.753508] Bluetooth: HCI device and connection manager initialized [ 18.753534] Bluetooth: HCI socket layer initialized [ 18.753548] Bluetooth: L2CAP socket layer initialized [ 18.753612] Bluetooth: SCO socket layer initialized [ 18.781182] Bluetooth: HCI UART driver ver 2.3 [ 18.781197] Bluetooth: HCI UART protocol H4 registered [ 18.781202] Bluetooth: HCI UART protocol Three-wire (H5) registered [ 18.786141] Bluetooth: HCI UART protocol Broadcom registered [ 19.362969] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 19.362997] Bluetooth: BNEP filters: protocol multicast [ 19.363027] Bluetooth: BNEP socket layer initialized [ 20.245972] wlan1: authenticate with 48:ee:0c:1f:d8:73 [ 20.308671] wlan1: send auth to 48:ee:0c:1f:d8:73 (try 1/3) [ 20.310399] wlan1: authenticated [ 20.313517] wlan1: associate with 48:ee:0c:1f:d8:73 (try 1/3) [ 20.317906] wlan1: RX AssocResp from 48:ee:0c:1f:d8:73 (capab=0x411 status=0 aid=7) [ 20.362268] wlan1: associated [ 21.491599] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 32.303384] nf_conntrack version 0.5.0 (7168 buckets, 28672 max) [ 33.692972] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1是樹莓派連接到的無線網路。wlan0是覆盆子自己內置的wifi。我沒有看到任何錯誤。這是
/var/log/syslog：Aug 5 16:55:06 raspberrypi kernel: [ 33.692972] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready Aug 5 16:55:06 raspberrypi hostapd[557]: Starting advanced IEEE 802.11 management: hostapd. Aug 5 16:55:06 raspberrypi dnsmasq[599]: started, version 2.76 cachesize 150 Aug 5 16:55:06 raspberrypi systemd[1]: Started LSB: Advanced IEEE 802.11 management daemon. Aug 5 16:55:06 raspberrypi dnsmasq[599]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify Aug 5 16:55:06 raspberrypi dnsmasq-dhcp[599]: DHCP, IP range 192.168.4.2 -- 192.168.4.20, lease time 1d Aug 5 16:55:06 raspberrypi dnsmasq[599]: reading /run/dnsmasq/resolv.conf Aug 5 16:55:06 raspberrypi dnsmasq[599]: using nameserver 192.168.25.1#53 Aug 5 16:55:06 raspberrypi dnsmasq[599]: read /etc/hosts - 5 addresses Aug 5 16:55:06 raspberrypi dnsmasq[600]: Too few arguments. Aug 5 16:55:06 raspberrypi systemd[1]: Started dnsmasq - A lightweight DHCP and caching DNS server. Aug 5 16:55:06 raspberrypi systemd[1]: Reached target Multi-User System. Aug 5 16:55:06 raspberrypi systemd[1]: Reached target Graphical Interface. Aug 5 16:55:06 raspberrypi systemd[1]: Starting Update UTMP about System Runlevel Changes... Aug 5 16:55:06 raspberrypi systemd[1]: Reached target Host and Network Name Lookups. Aug 5 16:55:06 raspberrypi systemd[1]: Started Update UTMP about System Runlevel Changes. Aug 5 16:55:06 raspberrypi systemd[1]: Startup finished in 1.995s (kernel) + 32.367s (userspace) = 34.362s. Aug 5 16:55:07 raspberrypi avahi-daemon[188]: Joining mDNS multicast group on interface wlan0.IPv6 with address fe80::ba27:ebff:feaa:1f8. Aug 5 16:55:07 raspberrypi avahi-daemon[188]: New relevant interface wlan0.IPv6 for mDNS. Aug 5 16:55:07 raspberrypi avahi-daemon[188]: Registering new address record for fe80::ba27:ebff:feaa:1f8 on wlan0.*. Aug 5 16:55:28 raspberrypi systemd[1]: Time has been changed Aug 5 16:55:28 raspberrypi systemd[1]: apt-daily-upgrade.timer: Adding 27min 26.673226s random time. Aug 5 16:55:28 raspberrypi systemd-timesyncd[173]: Synchronized to time server [2a01:4f8:110:30e1::9]:123 (2.debian.pool.ntp.org). Aug 5 16:55:28 raspberrypi systemd[1]: apt-daily.timer: Adding 7h 36min 12.296585s random time. Aug 5 17:01:05 raspberrypi systemd[1]: Created slice User Slice of pi. Aug 5 17:01:05 raspberrypi systemd[1]: Started Session c1 of user pi. Aug 5 17:01:05 raspberrypi systemd[1]: Starting User Manager for UID 1000... Aug 5 17:01:06 raspberrypi systemd[668]: Listening on GnuPG cryptographic agent and passphrase cache. Aug 5 17:01:06 raspberrypi systemd[668]: Listening on GnuPG cryptographic agent (access for web browsers). Aug 5 17:01:06 raspberrypi systemd[668]: Listening on GnuPG cryptographic agent and passphrase cache (restricted). Aug 5 17:01:06 raspberrypi systemd[668]: Reached target Timers. Aug 5 17:01:06 raspberrypi systemd[668]: Reached target Paths. Aug 5 17:01:06 raspberrypi systemd[668]: Listening on GnuPG cryptographic agent (ssh-agent emulation). Aug 5 17:01:06 raspberrypi systemd[668]: Reached target Sockets. Aug 5 17:01:06 raspberrypi systemd[668]: Reached target Basic System. Aug 5 17:01:06 raspberrypi systemd[668]: Reached target Default. Aug 5 17:01:06 raspberrypi systemd[668]: Startup finished in 178ms. Aug 5 17:01:06 raspberrypi systemd[1]: Started User Manager for UID 1000. Aug 5 17:02:40 raspberrypi wpa_supplicant[373]: wlan1: WPA: Group rekeying completed with 48:ee:0c:1f:d8:73 [GTK=CCMP]我也沒有看到任何錯誤
更新： 問題似乎只有在有人連接到網路後才會發生。syslog 上的最後一條消息是
Aug 5 17:39:27 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.11: associated Aug 5 17:39:27 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 RADIUS: starting accounting session 5B672BEA-00000000 Aug 5 17:39:27 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: pairwise key handshake completed (RSN) Aug 5 17:39:27 raspberrypi dnsmasq-dhcp[599]: DHCPDISCOVER(wlan0) 38:80:df:35:8a:d3 Aug 5 17:39:27 raspberrypi dnsmasq-dhcp[599]: DHCPOFFER(wlan0) 192.168.4.16 38:80:df:35:8a:d3 Aug 5 17:39:27 raspberrypi dnsmasq-dhcp[599]: DHCPREQUEST(wlan0) 192.168.4.16 38:80:df:35:8a:d3 Aug 5 17:39:27 raspberrypi dnsmasq-dhcp[599]: DHCPACK(wlan0) 192.168.4.16 38:80:df:35:8a:d3 Aug 5 17:41:35 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.11: disassociated Aug 5 17:41:35 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.11: disassociated但我沒有看到任何錯誤。
更新：
這是我的
/etc/hostapd/hostapd.conf文件：interface=wlan0 driver=nl80211 ssid=NameOfNetwork hw_mode=g channel=7 wmm_enabled=0 macaddr_acl=0 auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=AardvarkBadgerHedgehog wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP更新：
這是更詳細的hostapd：
Aug 5 18:21:22 raspberrypi systemd[1]: Started User Manager for UID 1000. Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.11: associated Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: event 1 notification Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: start authentication Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.1X: unauthorizing port Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: sending 1/4 msg of 4-Way Handshake Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: EAPOL-Key timeout Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: sending 1/4 msg of 4-Way Handshake Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: received EAPOL-Key frame (2/4 Pairwise) Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: sending 3/4 msg of 4-Way Handshake Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: received EAPOL-Key frame (4/4 Pairwise) Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.1X: authorizing port Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 RADIUS: starting accounting session 5B674006-00000000 Aug 5 18:21:40 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: pairwise key handshake completed (RSN) Aug 5 18:21:40 raspberrypi dnsmasq-dhcp[599]: DHCPDISCOVER(wlan0) 38:80:df:35:8a:d3 Aug 5 18:21:40 raspberrypi dnsmasq-dhcp[599]: DHCPOFFER(wlan0) 192.168.4.16 38:80:df:35:8a:d3 Aug 5 18:21:40 raspberrypi dnsmasq-dhcp[599]: DHCPREQUEST(wlan0) 192.168.4.16 38:80:df:35:8a:d3 Aug 5 18:21:40 raspberrypi dnsmasq-dhcp[599]: DHCPACK(wlan0) 192.168.4.16 38:80:df:35:8a:d3 Aug 5 18:21:54 raspberrypi systemd[664]: Time has been changed Aug 5 18:21:54 raspberrypi systemd[1]: Time has been changed Aug 5 18:21:54 raspberrypi systemd[1]: apt-daily.timer: Adding 10h 13min 39.087355s random time. Aug 5 18:21:54 raspberrypi systemd[1]: apt-daily-upgrade.timer: Adding 28min 49.504522s random time. Aug 5 18:22:27 raspberrypi systemd[1]: Time has been changed Aug 5 18:22:27 raspberrypi systemd[1]: apt-daily.timer: Adding 55min 40.693498s random time. Aug 5 18:22:27 raspberrypi systemd[1]: apt-daily-upgrade.timer: Adding 23min 53.062642s random time. Aug 5 18:22:27 raspberrypi systemd[664]: Time has been changed Aug 5 18:24:06 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.11: disassociated Aug 5 18:24:06 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 WPA: event 2 notification Aug 5 18:24:06 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.1X: unauthorizing port Aug 5 18:24:14 raspberrypi hostapd: wlan0: STA 38:80:df:35:8a:d3 IEEE 802.11: disassociated更新：
我之前用 USB 乙太網設置了這個樹莓派。我現在重新安裝了一個新的映像，並剛剛配置了無線 AP 功能所需的配置。問題仍然存在。之後它仍然會發生，
sudo apt update && sudo apt upgrade -y因此它看起來更像是一個錯誤而不是錯誤的配置。有人對如何調試它有任何想法嗎？
我可以在手機中看到我的 SSID，甚至可以連接到它並使用它幾秒鐘。然後 SSID 就消失了。
在你的/etc/hostapd/hostapd.conf你有這個預設值：
# Send empty SSID in beacons and ignore probe request frames that do not # specify full SSID, i.e., require stations to know SSID. # default: disabled (0) # 1 = send empty (length=0) SSID in beacon and ignore probe request for # broadcast SSID # 2 = clear SSID (ASCII 0), but keep the original length (this may be required # with some clients that do not support empty SSID) and ignore probe # requests for broadcast SSID ignore_broadcast_ssid=0確保它已禁用且未更改。
此外，這篇 Raspberry.PI 文章：“讓 wifi 與隱藏網路一起工作”建議：
“您必須將 scan_ssid=1 添加到 /etc/wpa_supplicant/wpa_supplicant.conf 文件中。”。
例子：
network={ ssid="bigboss" scan_ssid=1 psk="mypassword" proto=RSN key_mgmt=WPA-PSK pairwise=CCMP auth_alg=OPEN }
通過添加或修改這些參數
/etc/hostapd/hostapd.conf為我解決了這個問題：channel=6 ieee80211n=1 wmm_enabled=1