4.0-rtl8188cus wifi调试

在s5pv210+android4.0.3上移植realtek的wifi，根据以前的经验，从realtek网站下载

rtl8188cus的驱动，编译完驱动，移植到4.0.3中，出现一个现象，可以连接上wifi，而且

有获取到ip地址，但就是上不了外网，用IP的方式访问局域网服务器是可以的。

获取一些log：

I/SystemServer( 2119): NetworkStats Service

I/SystemServer( 2119): NetworkPolicy Service

I/SystemServer( 2119): Wi-Fi P2pService

I/SystemServer( 2119): Wi-Fi Service

E/CommandListener( 2025): Failed to open /proc/sys/net/ipv6/conf/wlan0/disable_ipv6: No such file or directory

E/WifiStateMachine( 2119): Failed to disable IPv6: java.lang.IllegalStateException: Unable to communicate to native daemon for disabling ipv6

I/SystemServer( 2119): Connectivity Service

D/ConnectivityService( 2119): ConnectivityService starting up

E/Ethernet( 2119): runDhcp() iface:

D/NetUtils( 2119): android_net_utils_runDhcpCommon in env=0x17584c8 clazz=0x1d300001 iface= renew=0

I/WifiService( 2119): WifiService starting up with Wi-Fi enabled

D/NetUtils( 2119): android_net_utils_runDhcpCommon in env=0x17bea08 clazz=0x1e100001 iface=wlan0 renew=0

I//system/bin/dhcpcd( 2450): dhcpcd[2451]: version 5.2.10 starting

I//system/bin/dhcpcd( 2450): dhcpcd[2451]: host does not support a monotonic clock - timing can skew

I//system/bin/dhcpcd( 2450): dhcpcd[2451]: wlan0: rebinding lease of 192.168.1.105

I//system/bin/dhcpcd( 2450): dhcpcd[2451]: wlan0: acknowledged 192.168.1.105 from 192.168.1.1

I//system/bin/dhcpcd( 2450): dhcpcd[2451]: wlan0: leased 192.168.1.105 for 7200 seconds

D/NetUtils( 2119): android_net_utils_runDhcpCommon dhcp_do_request() return 0, iface=wlan0

D/NetUtils( 2119): android_net_utils_runDhcpCommon dhcp_do_request() return -1, iface=

E/Ethernet( 2119): DHCP request error:Timed out waiting for init.svc.dhcpcd_ to start,interface:

可以见到，实际上是有一个Ethernet的dhcp请求interface为空，怀疑是这个问题造成，

于是追踪：

frameworks/base/core/jni/android_net_NetUtils.cpp

static jboolean android_net_utils_runDhcpCommon(JNIEnv* env, jobject clazz, jstring ifname,

        jobject info, bool renew)

static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info)

{ "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpInfoInternal;)Z",  (void *)android_net_utils_runDhcp },

frameworks/base/core/java/android/net/EthernetDataTracker.java

Log.d(TAG, "Adding " + iface);

Log.d(TAG, "Removing " + iface);

public void startMonitoring(Context context, Handler target) {

        sIfaceMatch = context.getResources().getString(

            com.android.internal.R.string.config_ethernet_iface_regex);

case ConnectivityManager.TYPE_ETHERNET:

mNetTrackers[netType] = EthernetDataTracker.getInstance();

mNetTrackers[netType].startMonitoring(context, mHandler);

break;

跟踪了startMonitoring()中对reconnect()的调用情况，发现不是这里，

而是下面一点：

            mCurrentLinkProperties[netType] = null;

            if (mNetTrackers[netType] != null && mNetConfigs[netType].isDefault()) {

                mNetTrackers[netType].reconnect();

            }

于是trace mNetConfigs，找到关键

String[] naStrings = context.getResources().getStringArray(

com.android.internal.R.array.networkAttributes);

发现在

device/samsung/smdkv210/overlay/frameworks/base/core/res/res/values/config.xml中的networkAttributes只有设置ethernet，而没有wifi。补上：

   

        "wifi,1,1,1,-1,true"

        "ethernet,9,9,1,-1,true"

   

   

        "1,1"

        "9,1"

   

修改后重新编译，wifi就可以上外网了。还是看guide不够仔细造成的。