Add static IpClient logging

Support keeping IpClient logs around and dumping them
during dumpsys.  Previously we got this benefit for
wifi by virtue of WifiStateMachine's long-lived nature.
Now that this is changing we need to be sure we have
logs, and this method gets us Ethernet logs as well.

Bug: 62476366
Bug: 77999594
Test: as follows
    - built
    - flashed
    - booted
    - runtest frameworks-net passes
    - dumpsys connmetrics [ipclient] works
Merged-In: Ib4daf0902cae91acadbe9965de1fb73c96a47bec
Merged-In: Ie947394fabcaca7fc1d067f095c2442ee2704593
Change-Id: I1136a83de8097fdb4130debe1eaf689be7132fe5
(cherry picked from commit 3f8306b8c5)

services/core/java/com/android/server/ConnectivityService.java

@@ -129,6 +129,7 @@ import com.android.internal.net.NetworkStatsFactory;
 import com.android.internal.net.VpnConfig;
 import com.android.internal.net.VpnInfo;
 import com.android.internal.net.VpnProfile;
+import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.AsyncChannel;
 import com.android.internal.util.DumpUtils;
 import com.android.internal.util.IndentingPrintWriter;
@@ -1935,13 +1936,6 @@ public class ConnectivityService extends IConnectivityManager.Stub
         return ret;
     }
 
-    private boolean argsContain(String[] args, String target) {
-        for (String arg : args) {
-            if (target.equals(arg)) return true;
-        }
-        return false;
-    }
-
     private void dumpNetworkDiagnostics(IndentingPrintWriter pw) {
         final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>();
         final long DIAG_TIME_MS = 5000;
@@ -1965,10 +1959,10 @@ public class ConnectivityService extends IConnectivityManager.Stub
         final IndentingPrintWriter pw = new IndentingPrintWriter(writer, "  ");
         if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return;
 
-        if (argsContain(args, DIAG_ARG)) {
+        if (ArrayUtils.contains(args, DIAG_ARG)) {
             dumpNetworkDiagnostics(pw);
             return;
-        } else if (argsContain(args, TETHERING_ARG)) {
+        } else if (ArrayUtils.contains(args, TETHERING_ARG)) {
             mTethering.dump(fd, pw, args);
             return;
         }
@@ -2033,7 +2027,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
         pw.println();
         dumpAvoidBadWifiSettings(pw);
 
-        if (argsContain(args, SHORT_ARG) == false) {
+        if (ArrayUtils.contains(args, SHORT_ARG) == false) {
             pw.println();
             synchronized (mValidationLogs) {
                 pw.println("mValidationLogs (most recent first):");

services/core/java/com/android/server/connectivity/IpConnectivityMetrics.java

@@ -20,6 +20,7 @@ import android.content.Context;
 import android.net.ConnectivityMetricsEvent;
 import android.net.IIpConnectivityMetrics;
 import android.net.INetdEventCallback;
+import android.net.ip.IpClient;
 import android.net.metrics.ApfProgramEvent;
 import android.net.metrics.IpConnectivityLog;
 import android.os.Binder;
@@ -269,10 +270,12 @@ final public class IpConnectivityMetrics extends SystemService {
         // Dump the rolling buffer of metrics event and pretty print events using a human readable
         // format. Also print network dns/connect statistics and default network event time series.
         static final String CMD_LIST = "list";
-        // By default any other argument will fall into the default case which is remapped to the
-        // "list" command. This includes most notably bug reports collected by dumpsys.cpp with
-        // the "-a" argument.
-        static final String CMD_DEFAULT = CMD_LIST;
+        // Dump all IpClient logs ("ipclient").
+        static final String CMD_IPCLIENT = IpClient.DUMP_ARG;
+        // By default any other argument will fall into the default case which is the equivalent
+        // of calling both the "list" and "ipclient" commands. This includes most notably bug
+        // reports collected by dumpsys.cpp with the "-a" argument.
+        static final String CMD_DEFAULT = "";
 
         @Override
         public int logEvent(ConnectivityMetricsEvent event) {
@@ -292,9 +295,20 @@ final public class IpConnectivityMetrics extends SystemService {
                 case CMD_PROTO:
                     cmdListAsProto(pw);
                     return;
-                case CMD_LIST: // fallthrough
+                case CMD_IPCLIENT: {
+                    final String[] ipclientArgs = ((args != null) && (args.length > 1))
+                            ? Arrays.copyOfRange(args, 1, args.length)
+                            : null;
+                    IpClient.dumpAllLogs(pw, ipclientArgs);
+                    return;
+                }
+                case CMD_LIST:
+                    cmdList(pw);
+                    return;
                 default:
                     cmdList(pw);
+                    pw.println("");
+                    IpClient.dumpAllLogs(pw, null);
                     return;
             }
         }

services/net/java/android/net/ip/IpClient.java

@@ -53,6 +53,7 @@ import android.util.SparseArray;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.R;
+import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.IState;
 import com.android.internal.util.Preconditions;
@@ -73,6 +74,7 @@ import java.util.Objects;
 import java.util.List;
 import java.util.Set;
 import java.util.StringJoiner;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CountDownLatch;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
@@ -99,6 +101,36 @@ public class IpClient extends StateMachine {
     private static final Class[] sMessageClasses = { IpClient.class, DhcpClient.class };
     private static final SparseArray<String> sWhatToString =
             MessageUtils.findMessageNames(sMessageClasses);
+    // Two static concurrent hashmaps of interface name to logging classes.
+    // One holds StateMachine logs and the other connectivity packet logs.
+    private static final ConcurrentHashMap<String, SharedLog> sSmLogs = new ConcurrentHashMap<>();
+    private static final ConcurrentHashMap<String, LocalLog> sPktLogs = new ConcurrentHashMap<>();
+
+    // If |args| is non-empty, assume it's a list of interface names for which
+    // we should print IpClient logs (filter out all others).
+    public static void dumpAllLogs(PrintWriter writer, String[] args) {
+        for (String ifname : sSmLogs.keySet()) {
+            if (!ArrayUtils.isEmpty(args) && !ArrayUtils.contains(args, ifname)) continue;
+
+            writer.println(String.format("--- BEGIN %s ---", ifname));
+
+            final SharedLog smLog = sSmLogs.get(ifname);
+            if (smLog != null) {
+                writer.println("State machine log:");
+                smLog.dump(null, writer, null);
+            }
+
+            writer.println("");
+
+            final LocalLog pktLog = sPktLogs.get(ifname);
+            if (pktLog != null) {
+                writer.println("Connectivity packet log:");
+                pktLog.readOnlyLocalLog().dump(null, writer, null);
+            }
+
+            writer.println(String.format("--- END %s ---", ifname));
+        }
+    }
 
     /**
      * Callbacks for handling IpClient events.
@@ -659,8 +691,10 @@ public class IpClient extends StateMachine {
         mShutdownLatch = new CountDownLatch(1);
         mNwService = deps.getNMS();
 
-        mLog = new SharedLog(MAX_LOG_RECORDS, mTag);
-        mConnectivityPacketLog = new LocalLog(MAX_PACKET_RECORDS);
+        sSmLogs.putIfAbsent(mInterfaceName, new SharedLog(MAX_LOG_RECORDS, mTag));
+        mLog = sSmLogs.get(mInterfaceName);
+        sPktLogs.putIfAbsent(mInterfaceName, new LocalLog(MAX_PACKET_RECORDS));
+        mConnectivityPacketLog = sPktLogs.get(mInterfaceName);
         mMsgStateLogger = new MessageHandlingLogger();
 
         // TODO: Consider creating, constructing, and passing in some kind of