java - LDAPException(resultCode=91 (connect error), errorMessage='尝试连接服务器时发生错误

Question

我正在尝试制作一个 Android 应用程序以连接到 LDAP 服务器。我正在使用 UnboundId 库，因此我的应用程序能够建立 LDAP 连接。问题是resultCode 91-connection错误，我不知道如何解决。 LDAP 服务器已启动并正在运行，因为我的桌面应用程序可以建立连接。 我将附上代码:

           TextView tv = (TextView)findViewById(R.id.textView);
     try {
        LDAPConnection c = new LDAPConnection("192.168.106.131",389,"cn=admin,dc=test,dc=com","haha");

        if(c.isConnected())
        {
            tv.setText("good");
        }
        else
        {
            tv.setText("bad");
        }
    } catch (LDAPException e) {
        tv.setText("error");
        e.printStackTrace();
    }

以及来自 LogCat 的日志:

            05-25 22:56:49.653: E/SELinux(21849): selinux_android_seapp_context_reload:       seapp_contexts file is loaded from /data/security/spota/seapp_contexts
            05-25 22:56:49.663: D/dalvikvm(21849): Late-enabling CheckJNI
            05-25 22:56:50.184: W/dalvikvm(21849): VFY: unable to find class referenced in signature (Ljavax/security/sasl/SaslClient;)
            05-25 22:56:50.184: W/dalvikvm(21849): VFY: unable to find class referenced in signature (Ljavax/security/sasl/SaslClient;)
            05-25 22:56:50.194: I/dalvikvm(21849): Could not find method javax.security.sasl.SaslClient.dispose, referenced from method com.unboundid.ldap.sdk.LDAPConnectionInternals.close
            05-25 22:56:50.194: W/dalvikvm(21849): VFY: unable to resolve interface method 12795: Ljavax/security/sasl/SaslClient;.dispose ()V
            05-25 22:56:50.194: D/dalvikvm(21849): VFY: replacing opcode 0x72 at 0x0040
            05-25 22:56:50.214: I/dalvikvm(21849): Could not find method javax.security.sasl.SaslClient.wrap, referenced from method com.unboundid.ldap.sdk.LDAPConnectionInternals.sendMessage
            05-25 22:56:50.214: W/dalvikvm(21849): VFY: unable to resolve interface method 12801: Ljavax/security/sasl/SaslClient;.wrap ([BII)[B
            05-25 22:56:50.214: D/dalvikvm(21849): VFY: replacing opcode 0x72 at 0x005c
            05-25 22:57:50.448: W/System.err(21849): LDAPException(resultCode=91 (connect error), errorMessage='An error occurred while attempting to connect to server             192.168.106.131:389:  java.io.IOException: Unable to establish a connection to server 192.168.106.131:389 within the configured timeout of 60000 milliseconds.')
            05-25 22:57:50.448: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnection.connect(LDAPConnection.java:755)
            05-25 22:57:50.448: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnection.connect(LDAPConnection.java:687)
            05-25 22:57:50.448: W/System.err(21849):    at com.example.aaa.MainActivity.onCreate(MainActivity.java:29)
            05-25 22:57:50.448: W/System.err(21849):    at android.app.Activity.performCreate(Activity.java:5255)
            05-25 22:57:50.448: W/System.err(21849):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097)
            05-25 22:57:50.448: W/System.err(21849):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2213)
            05-25 22:57:50.448: W/System.err(21849):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2299)
            05-25 22:57:50.448: W/System.err(21849):    at android.app.ActivityThread.access$700(ActivityThread.java:154)
            05-25 22:57:50.448: W/System.err(21849):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284)
            05-25 22:57:50.448: W/System.err(21849):    at android.os.Handler.dispatchMessage(Handler.java:99)
            05-25 22:57:50.458: W/System.err(21849):    at android.os.Looper.loop(Looper.java:137)
            05-25 22:57:50.458: W/System.err(21849):    at android.app.ActivityThread.main(ActivityThread.java:5306)
            05-25 22:57:50.458: W/System.err(21849):    at java.lang.reflect.Method.invokeNative(Native Method)
            05-25 22:57:50.458: W/System.err(21849):    at java.lang.reflect.Method.invoke(Method.java:511)
            05-25 22:57:50.458: W/System.err(21849):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
            05-25 22:57:50.458: W/System.err(21849):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
            05-25 22:57:50.458: W/System.err(21849):    at dalvik.system.NativeStart.main(Native Method)
            05-25 22:57:50.458: W/System.err(21849): Caused by: java.io.IOException: Unable to establish a connection to server 192.168.106.131:389 within the configured timeout of 60000 milliseconds.
            05-25 22:57:50.458: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnectionInternals.<init>(LDAPConnectionInternals.java:143)
            05-25 22:57:50.458: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnection.connect(LDAPConnection.java:745)
            05-25 22:57:50.458: W/System.err(21849):    ... 16 more
            05-25 22:57:50.468: W/System.err(21849): LDAPException(resultCode=81 (server down), errorMessage='The connection is not established.')
            05-25 22:57:50.468: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnection.registerResponseAcceptor(LDAPConnection.java:4228)
            05-25 22:57:50.468: W/System.err(21849):    at com.unboundid.ldap.sdk.SimpleBindRequest.process(SimpleBindRequest.java:538)
            05-25 22:57:50.468: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnection.bind(LDAPConnection.java:1893)
            05-25 22:57:50.468: W/System.err(21849):    at com.unboundid.ldap.sdk.LDAPConnection.bind(LDAPConnection.java:1855)
            05-25 22:57:50.468: W/System.err(21849):    at com.example.aaa.MainActivity.onCreate(MainActivity.java:46)
            05-25 22:57:50.468: W/System.err(21849):    at android.app.Activity.performCreate(Activity.java:5255)
            05-25 22:57:50.468: W/System.err(21849):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097)
            05-25 22:57:50.468: W/System.err(21849):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2213)
            05-25 22:57:50.468: W/System.err(21849):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2299)
            05-25 22:57:50.468: W/System.err(21849):    at android.app.ActivityThread.access$700(ActivityThread.java:154)
            05-25 22:57:50.468: W/System.err(21849):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284)
            05-25 22:57:50.468: W/System.err(21849):    at android.os.Handler.dispatchMessage(Handler.java:99)
            05-25 22:57:50.478: W/System.err(21849):    at android.os.Looper.loop(Looper.java:137)
            05-25 22:57:50.478: W/System.err(21849):    at android.app.ActivityThread.main(ActivityThread.java:5306)
            05-25 22:57:50.478: W/System.err(21849):    at java.lang.reflect.Method.invokeNative(Native Method)
            05-25 22:57:50.478: W/System.err(21849):    at java.lang.reflect.Method.invoke(Method.java:511)
            05-25 22:57:50.478: W/System.err(21849):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
            05-25 22:57:50.478: W/System.err(21849):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
            05-25 22:57:50.478: W/System.err(21849):    at dalvik.system.NativeStart.main(Native Method)
            05-25 22:57:50.548: D/libEGL(21849): loaded /system/lib/egl/libEGL_adreno200.so
            05-25 22:57:50.548: D/libEGL(21849): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
             05-25 22:57:50.558: D/libEGL(21849): loaded /system/lib/egl/libGLESv2_adreno200.so
            05-25 22:57:50.568: I/Adreno200-EGL(21849): <qeglDrvAPI_eglInitialize:265>: EGL 1.4 QUALCOMM build:   AYELDER_AU_LINUX_ANDROID_JB_2.5.5.04.02.02.092.023+PATCH[ES]_msm8960_JB_2.5.5_CL3556704_rel ease_ENGG (CL3556704)
            05-25 22:57:50.568: I/Adreno200-EGL(21849): Build Date: 05/17/13 Fri
            05-25 22:57:50.568: I/Adreno200-EGL(21849): Local Branch: 
            05-25 22:57:50.568: I/Adreno200-EGL(21849): Remote Branch: quic/jb_2.5.5
            05-25 22:57:50.568: I/Adreno200-EGL(21849): Local Patches: 34c9e193f12610d3e68dabd6198d2c4bfbc66974 RB: Update the master timestamp of the hw_image in rb_texture_update_aliased
             05-25 22:57:50.568: I/Adreno200-EGL(21849): Reconstruct Branch: AU_LINUX_ANDROID_JB_2.5.5.04.02.02.092.023 + 01d3c78 + e6f0547 +  LOCAL_PATCH[ES]

05-25 22:57:50.618: D/OpenGLRenderer(21849): 启用 Debug模式 0

Answer 1

该错误信息表明设备无法与指定的 IP 地址建立连接。 192.168.. 是一个专用 LAN 网络，因此如果您使用运营商的移动网络，则它无法访问它。如果设备连接到 WiFi，那么您可能仍然需要一些 VPN 隧道。

如果您知道在同一网络上运行的 Web 服务器，则可以使用 Web 浏览器来测试与该网络的连接。或者，您可以尝试使用公共(public)目录服务器的 LDAP 客户端(例如，您可以尝试在端口 389 上使用 directory.verisign.com 进行未加密通信)。