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我通过 wpa_supplicant 和一个调用 wpa_ctrl API [2] 的简单 C 程序 [1] 启用到 Linux 主机的 WiFi P2P 连接。通过 Nexus 7 Android 平板电脑连接然后断开连接后，Linux 主机从平板电脑的 P2P 对等点列表中消失，只有在重新启动主机后才会重新出现。我尝试过重新发布 p2p_ext_listen，重新启动 wpa_supplicant，并使用 modprobe 取消/重新加载 mwifiex_sdio 驱动程序。我相信这是我的代码之外的一个错误，但如果是这样，在哪里？

[1] https://github.com/networkimprov/p2p-host/blob/master/main.c
随意在 x86 linux 机器上构建和测试 :-)

[2] https://w1.fi/wpa_supplicant/devel/ctrl_iface_page.html

我的 Linux 主机：

  • wpa_supplicant 2.5 与 -i p2p0 -D nl80211 -c /etc/wpa_supplicant/p2p0.conf
  • 内核 4.7.2（主线）
  • 发行版 Arch Linux ARM
  • 收音机 Marvell sd8787
  • 中央处理器 OMAP3

p2p0.conf：

ctrl_interface=/run/wpa_supplicant
ap_scan=1
device_name=mwifiex-p2p-device
device_type=1-0050F204-1
p2p_listen_reg_class=81
p2p_listen_channel=1
p2p_oper_reg_class=81
p2p_oper_channel=1
p2p_no_group_iface=1
p2p_go_intent=15

程序日志（>>> 将 msg 标记为 wpa_supplicant）：

$ sudo p2p-host/p2phostd /run/wpa_supplicant/p2p0 75 1500 11111111
>>> P2P_EXT_LISTEN 75 1500
    OK
    <3>P2P-DEVICE-FOUND ae:22:0b:48:49:61 p2p_dev_addr=ae:22:0b:48:49:61 pri_dev_type=10-0050F204-5 name='Android_7326' config_methods=0x188 dev_capab=0x25 group_capab=0x0 new=1
    <3>P2P-PROV-DISC-SHOW-PIN ae:22:0b:48:49:61 72764473 p2p_dev_addr=ae:22:0b:48:49:61 pri_dev_type=10-0050F204-5 name='Android_7326' config_methods=0x188 dev_capab=0x25 group_capab=0x0
>>> P2P_CONNECT ae:22:0b:48:49:61 11111111 display go_intent=0
    OK
    <3>P2P-GO-NEG-SUCCESS role=client freq=2417 ht40=0 peer_dev=ae:22:0b:48:49:61 peer_iface=ae:22:0b:48:c9:61 wps_method=Display
    <3>CTRL-EVENT-SCAN-STARTED
    <3>CTRL-EVENT-BSS-ADDED 0 20:4e:7f:92:63:d6
    <3>CTRL-EVENT-SCAN-RESULTS
    <3>WPS-AP-AVAILABLE
    <3>CTRL-EVENT-SCAN-STARTED
    <3>CTRL-EVENT-BSS-ADDED 1 ae:22:0b:48:c9:61
    <3>CTRL-EVENT-SCAN-RESULTS
    <3>WPS-AP-AVAILABLE-AUTH
    <3>Trying to associate with ae:22:0b:48:c9:61 (SSID='DIRECT-Mw-Android_7326' freq=2417 MHz)
    <3>Associated with ae:22:0b:48:c9:61
    <3>CTRL-EVENT-EAP-STARTED EAP authentication started
    <3>CTRL-EVENT-EAP-STATUS status='started' parameter=''
    <3>CTRL-EVENT-EAP-PROPOSED-METHOD vendor=14122 method=1
    <3>CTRL-EVENT-EAP-STATUS status='accept proposed method' parameter='WSC'
    <3>CTRL-EVENT-EAP-METHOD EAP vendor 14122 method 1 (WSC) selected
    <3>WPS-CRED-RECEIVED
    <3>WPS-SUCCESS
    <3>P2P-GROUP-FORMATION-SUCCESS
    <3>CTRL-EVENT-EAP-STATUS status='completion' parameter='failure'
    <3>CTRL-EVENT-EAP-FAILURE EAP authentication failed
    <3>CTRL-EVENT-DISCONNECTED bssid=ae:22:0b:48:c9:61 reason=3 locally_generated=1
    <3>Trying to associate with ae:22:0b:48:c9:61 (SSID='DIRECT-Mw-Android_7326' freq=2417 MHz)
    <3>Associated with ae:22:0b:48:c9:61
    <3>WPA: Key negotiation completed with ae:22:0b:48:c9:61 [PTK=CCMP GTK=CCMP]
    <3>CTRL-EVENT-CONNECTED - Connection to ae:22:0b:48:c9:61 completed [id=0 id_str=]
    <3>P2P-GROUP-STARTED p2p0 client ssid="DIRECT-Mw-Android_7326" freq=2417 psk=... go_dev_addr=ae:22:0b:48:49:61 [PERSISTENT]
...disconnect after a short while...
    <3>CTRL-EVENT-BSS-REMOVED 0 20:4e:7f:92:63:d6
    <3>CTRL-EVENT-DISCONNECTED bssid=ae:22:0b:48:c9:61 reason=3
    <3>CTRL-EVENT-DISCONNECTED bssid=ae:22:0b:48:c9:61 reason=3 locally_generated=1
    <3>P2P-GROUP-REMOVED p2p0 client reason=GO_ENDING_SESSION
...Linux host disappears from P2P list...
^C
$ wget help
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