[RK3288][Android6.0] 调试笔记 --- WiFi一直处于“正在连接”状态

Platform: RK3288
OS: Android 6.0
Kernel: 3.10.92

现象：

1. Wifi提示正在连接，但是一直连接不上。
2. 换了其他的一个AP,也提示连接不上。

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分析：

根据WIFI连接过程可知，显示正在连接时dhcp client会从路由器那边获取ip address.

正常Log：


06-13 14:56:23.697 583 1340 D DhcpClient: Broadcasting DHCPDISCOVER
06-13 14:56:23.710 583 1402 D DhcpClient: Received packet: b0:f1:ec:49:50:7c OFFER, ip /10.89.19.43, mask /255.255.255.0, DNS servers: /61.177.7.1 , gateways [/10.89.19.254] lease time 28361, domain null
06-13 14:56:23.756 583 1340 D DhcpClient: Got pending lease: IP address 10.89.19.43/24 Gateway 10.89.19.254 DNS servers: [ 61.177.7.1 ] Domains DHCP server /10.89.19.254 Vendor info null lease 28361 seconds
06-13 14:56:23.766 583 1340 D DhcpClient: Broadcasting DHCPREQUEST ciaddr=0.0.0.0 request=10.89.19.43 serverid=10.89.19.254


异常Log:


01-01 08:59:18.084 574 2152 D DhcpClient: Broadcasting DHCPDISCOVER
01-01 08:59:23.084 574 616 V AlarmManager: triggered: act=android.net.dhcp.DhcpClient.wlan0.KICK flg=0x14000000 pkg=android Pkg: android
01-01 08:59:23.085 574 2152 D DhcpClient: Broadcasting DHCPDISCOVER
01-01 08:59:25.802 574 3078 D DhcpClient: Received packet: b0:35:9f:f7:a8:19 ACK: your new IP /10.89.19.41, netmask /255.255.255.0, gateways [/10.89.19.254] DNS servers: /61.177.7.1 , lease time 28800
01-01 08:59:25.802 574 2152 D DhcpClient: Unexpected transaction ID 1372880143, expected 1458931725
01-01 08:59:28.086 574 616 V AlarmManager: triggered: act=android.net.dhcp.DhcpClient.wlan0.KICK flg=0x14000000 pkg=android Pkg: android
01-01 08:59:28.088 574 2152 D DhcpClient: Broadcasting DHCPDISCOVER
01-01 08:59:29.690 574 3078 D DhcpClient: Received packet: b0:35:9f:f7:a8:19 ACK: your new IP /10.89.19.41, netmask /255.255.255.0, gateways [/10.89.19.254] DNS servers: /61.177.7.1 , lease time 28800
01-01 08:59:29.690 574 2152 D DhcpClient: Unexpected transaction ID 1372880143, expected 1458931725
01-01 08:59:36.439 574 616 V AlarmManager: triggered: act=android.net.dhcp.DhcpClient.wlan0.KICK flg=0x14000000 pkg=android Pkg: android
01-01 08:59:36.442 574 2152 D DhcpClient: Broadcasting DHCPDISCOVER
01-01 08:59:51.207 574 616 V AlarmManager: triggered: act=android.net.dhcp.DhcpClient.wlan0.KICK flg=0x14000000 pkg=android Pkg: android
01-01 08:59:51.208 574 2152 D DhcpClient: Broadcasting DHCPDISCOVER
01-01 08:59:53.940 574 616 V AlarmManager: triggered: act=android.net.dhcp.DhcpClient.wlan0.ONESHOT_TIMEOUT flg=0x14000000 pkg=android Pkg: android
01-01 08:59:53.941 574 2152 D DhcpClient: Timed out
01-01 08:59:53.962 574 708 E WifiConfigStore: SSID temp disabled for "chat-5G"WPA_PSK had autoJoinStatus=0 self added false ephemeral false
01-01 08:59:53.962 574 708 E WifiConfigStore: message=DHCP FAILURE


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原因：

现象一：

DHCP分配ip address失败了，可能是连接到路由器的终端达到设置数上限了。

现象二：

连接的两个AP接入到同一个ip地址段范围。