调试p2p功能之前，需要驱动打开p2p的支持，可以用ifconfig -a指令查看是否存在p2p网络节点
1、查看网络节点
341.68< ifconfig -a
341.71> ifconfig -a
341.95> carplay0 Link encap:Ethernet HWaddr DE:8A:1E:E6:91:9F
341.95> BROADCAST MULTICAST MTU:1500 Metric:1
341.95> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
341.95> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
341.95> collisions:0 txqueuelen:1000
341.95> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
341.95>
341.95> eth0 Link encap:Ethernet HWaddr DE:F0:8D:8F:D1:B1
341.95> BROADCAST MULTICAST MTU:1500 Metric:1
341.95> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
341.95> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
341.96> collisions:0 txqueuelen:1000
341.96> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
341.96> Interrupt:114
341.96>
341.96> lo Link encap:Local Loopback
341.96> inet addr:127.0.0.1 Mask:255.0.0.0
341.96> inet6 addr: ::1%4812464/128 Scope:Host
341.96> UP LOOPBACK RUNNING MTU:65536 Metric:1
341.96> RX packets:21 errors:0 dropped:0 overruns:0 frame:0
341.96> TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
341.96> collisions:0 txqueuelen:1000
341.96> RX bytes:1747 (1.7 KiB) TX bytes:1747 (1.7 KiB)
341.96>
341.96> mlan0 Link encap:Ethernet HWaddr 8C:45:00:04:02:93
341.96> inet addr:192.168.0.22 Bcast:192.168.0.255 Mask:255.255.255.0
341.96> UP BROADCAST MULTICAST MTU:1500 Metric:1
341.96> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
341.96> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
341.96> collisions:0 txqueuelen:1000
341.96> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
341.96>
341.96> uap0 Link encap:Ethernet HWaddr 8C:45:00:04:03:93
341.96> BROADCAST MULTICAST MTU:1500 Metric:1
341.96> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
341.96> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
341.96> collisions:0 txqueuelen:1000
341.96> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
341.96>
341.96> uap1 Link encap:Ethernet HWaddr 8C:45:00:04:04:93
341.96> BROADCAST MULTICAST MTU:1500 Metric:1
341.96> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
341.96> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
341.96> collisions:0 txqueuelen:1000
341.96> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
341.96>
341.96> wfd0 Link encap:Ethernet HWaddr 8E:45:00:04:02:93
341.98> BROADCAST MULTICAST MTU:1500 Metric:1
341.98> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
341.98> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
341.98> collisions:0 txqueuelen:1000
341.98> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
2、启动wpa_supplicant （同时启动wifi p2p和sta）
448.95< wpa_supplicant -iwfd0 -Dnl80211 -c/home/root/p2p.conf -N -imlan0 -c/home/root/test.conf -B
448.98> wpa_supplicant -iwfd0 -Dnl80211 -c/home/root/p2p.conf -N -imlan0 -c/home/root/test.conf -B
449.07> Successfully initialized wpa_supplicant
449.07> [ 96.835531] get_channel when STA is not connected
449.07> [ 96.841396] get_channel when STA is not connected
449.09> [ 96.847810] cyttsp6_i2c_adapter 2-0024: _cyttsp6_watchdog_work: device found in bootloader mode
449.09> [ 96.857353] get_channel when STA is not connected
449.09> [ 96.862738] get_channel when STA is not connected
449.09> [ 96.870589] get_channel when STA is not connected
449.15> [ 96.915558] get_channel when STA is not connected
449.15> [ 96.922189] get_channel when STA is not connected
449.15> [ 96.928465] get_channel when STA is not connected
449.15> [ 96.933730] get_channel when STA is not connected
449.15> [ 96.940273] get_channel when STA is not connected
3、启动wap_cli工具
541.56< wpa_cli -iwfd0
541.59> wpa_cli -iwfd0
541.62> wpa_cli v2.6
541.64> Copyright (c) 2004-2016, Jouni Malinen
541.64> This software may be distributed under the terms of the BSD license.
541.64> See README for more details.
541.64> Interactive mode
4、p2p测试
625.60< p2p_find 10
625.62> p2p_find 10
625.62> > OK
625.64> > > [ 273.425512] wlan: wfd0 START SCAN
2265.62> > <3>P2P-DEVICE-FOUND b6:c4:fc:e0:bf:d0 p2p_dev_addr=b6:c4:fc:e0:bf:d0 pri_dev_type=10-0050F204-5 name='Redmi' config_methods=0x188 dev_capab=0x25 group_capab=0x0 new=1
2446.48< p2p_peers
2446.50> p2p_peers
2446.50> b6:c4:fc:e0:bf:d0
2767.07< p2p_connect b6:c4:fc:e0:bf:d0 pbc (需要打开车机的热点)
2459.18< p2p_connect 2e:0e:3d:4d:90:e7 pbc
2459.21> p2p_connect 2e:0e:3d:4d:90:e7 pbc
2459.23> OK
2459.23> > > [ 124.596059] wlan: TX P2P Group Owner Negotiation Req Frame, channel=1
2459.65> [ 125.033239] wlan: TX P2P Group Owner Negotiation Req Frame, channel=1
...
2464.21> [ 129.588162] wlan: RX P2P Group Owner Negotiation Req Frame, channel=1
...
2464.60> > <3>CTRL-EVENT-CONNECTED - Connection to 8e:45:00:04:02:93 completed [id=0 id_str=]
2464.60> > <3>WPS-PBC-ACTIVE
2464.26> [ 129.595560] wlan: TX P2P Group Owner Negotiation Rsp Frame, channel=1
...
2465.81> > <3>WPS-REG-SUCCESS 2e:0e:3d:4d:10:e7 70fe8410-3499-5d77-9007-86190cba6220
2465.84> > <3>P2P-GROUP-FORMATION-SUCCESS
2465.84> > <3>P2P-GROUP-STARTED wfd0 GO ssid="DIRECT-J4" freq=5240 passphrase="gHyeDd38" go_dev_addr=8e:45:00:04:02:93
2465.84> > <3>WPS-PBC-DISABLE
2465.84> > <3>WPS-SUCCESS