diff --git a/Android.bp b/Android.bp
index 908274d..b7ca9a6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -597,6 +597,7 @@
         "&& $(location soong_zip) -jar -o $(out) -C $(genDir)/$(in) -D $(genDir)/$(in)",
 
     srcs: [
+        ":ipconnectivity-proto-src",
         "core/proto/**/*.proto",
         "libs/incident/**/*.proto",
     ],
@@ -707,6 +708,7 @@
 java_library_host {
     name: "platformprotos",
     srcs: [
+        ":ipconnectivity-proto-src",
         "cmds/am/proto/instrumentation_data.proto",
         "cmds/statsd/src/**/*.proto",
         "core/proto/**/*.proto",
@@ -735,6 +737,7 @@
     ],
     sdk_version: "9",
     srcs: [
+        ":ipconnectivity-proto-src",
         "core/proto/**/*.proto",
         "libs/incident/proto/android/os/**/*.proto",
     ],
@@ -749,6 +752,7 @@
     },
 
     srcs: [
+        ":ipconnectivity-proto-src",
         "core/proto/**/*.proto",
         "libs/incident/proto/android/os/**/*.proto",
     ],
@@ -779,6 +783,7 @@
     ],
 
     srcs: [
+        ":ipconnectivity-proto-src",
         "core/proto/**/*.proto",
     ],
 }
diff --git a/core/proto/android/os/incident.proto b/core/proto/android/os/incident.proto
index 8f9c041..1482a3b 100644
--- a/core/proto/android/os/incident.proto
+++ b/core/proto/android/os/incident.proto
@@ -56,6 +56,7 @@
 import "frameworks/base/core/proto/android/util/log.proto";
 import "frameworks/base/core/proto/android/privacy.proto";
 import "frameworks/base/core/proto/android/section.proto";
+import "frameworks/base/proto/src/ipconnectivity.proto";
 
 package android.os;
 
@@ -475,6 +476,11 @@
         (section).args = "cpuinfo --proto"
     ];
 
+    optional .clearcut.connectivity.IpConnectivityLog ip_connectivity_metrics = 3049 [
+        (section).type = SECTION_DUMPSYS,
+        (section).args = "connmetrics --proto"
+    ];
+
     // Reserved for OEMs.
     extensions 50000 to 100000;
 }
diff --git a/proto/Android.bp b/proto/Android.bp
index 7cf6ce7..01a72ea 100644
--- a/proto/Android.bp
+++ b/proto/Android.bp
@@ -32,3 +32,8 @@
     name: "system-messages-proto-src",
     srcs: ["src/system_messages.proto"],
 }
+
+filegroup {
+    name: "ipconnectivity-proto-src",
+    srcs: ["src/ipconnectivity.proto"],
+}
diff --git a/services/core/java/com/android/server/connectivity/DefaultNetworkMetrics.java b/services/core/java/com/android/server/connectivity/DefaultNetworkMetrics.java
index 96a202f..299cb66 100644
--- a/services/core/java/com/android/server/connectivity/DefaultNetworkMetrics.java
+++ b/services/core/java/com/android/server/connectivity/DefaultNetworkMetrics.java
@@ -81,9 +81,12 @@
         printEvent(localTimeMs, pw, mCurrentDefaultNetwork);
     }
 
-    public synchronized void listEventsAsProto(PrintWriter pw) {
+    /**
+     * Convert events in the ring buffer to protos and add to the given list
+     */
+    public synchronized void listEventsAsProto(List<IpConnectivityEvent> out) {
         for (DefaultNetworkEvent ev : mEventsLog.toArray()) {
-            pw.print(IpConnectivityEventBuilder.toProto(ev));
+            out.add(IpConnectivityEventBuilder.toProto(ev));
         }
     }
 
diff --git a/services/core/java/com/android/server/connectivity/IpConnectivityMetrics.java b/services/core/java/com/android/server/connectivity/IpConnectivityMetrics.java
index 33f6ed5..1337a93 100644
--- a/services/core/java/com/android/server/connectivity/IpConnectivityMetrics.java
+++ b/services/core/java/com/android/server/connectivity/IpConnectivityMetrics.java
@@ -41,7 +41,9 @@
 import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityEvent;
 
 import java.io.FileDescriptor;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -239,18 +241,37 @@
         mDefaultNetworkMetrics.listEvents(pw);
     }
 
+    private List<IpConnectivityEvent> listEventsAsProtos() {
+        final List<IpConnectivityEvent> events = IpConnectivityEventBuilder.toProto(getEvents());
+        if (mNetdListener != null) {
+            mNetdListener.listAsProtos(events);
+        }
+        mDefaultNetworkMetrics.listEventsAsProto(events);
+        return events;
+    }
+
     /*
      * Print the content of the rolling event buffer in text proto format.
      */
-    private void cmdListAsProto(PrintWriter pw) {
-        final List<ConnectivityMetricsEvent> events = getEvents();
-        for (IpConnectivityEvent ev : IpConnectivityEventBuilder.toProto(events)) {
-            pw.print(ev.toString());
+    private void cmdListAsTextProto(PrintWriter pw) {
+        listEventsAsProtos().forEach(e -> pw.print(e.toString()));
+    }
+
+    /*
+     * Write the content of the rolling event buffer in proto wire format to the given OutputStream.
+     */
+    private void cmdListAsBinaryProto(OutputStream out) {
+        final int dropped;
+        synchronized (mLock) {
+            dropped = mDropped;
         }
-        if (mNetdListener != null) {
-            mNetdListener.listAsProtos(pw);
+        try {
+            byte[] data = IpConnectivityEventBuilder.serialize(dropped, listEventsAsProtos());
+            out.write(data);
+            out.flush();
+        } catch (IOException e) {
+            Log.e(TAG, "could not serialize events", e);
         }
-        mDefaultNetworkMetrics.listEventsAsProto(pw);
     }
 
     /*
@@ -267,6 +288,9 @@
         static final String CMD_FLUSH = "flush";
         // Dump the rolling buffer of metrics event in human readable proto text format.
         static final String CMD_PROTO = "proto";
+        // Dump the rolling buffer of metrics event in proto wire format. See usage() of
+        // frameworks/native/cmds/dumpsys/dumpsys.cpp for details.
+        static final String CMD_PROTO_BIN = "--proto";
         // 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";
@@ -291,7 +315,10 @@
                     cmdFlush(pw);
                     return;
                 case CMD_PROTO:
-                    cmdListAsProto(pw);
+                    cmdListAsTextProto(pw);
+                    return;
+                case CMD_PROTO_BIN:
+                    cmdListAsBinaryProto(new FileOutputStream(fd));
                     return;
                 case CMD_LIST:
                 default:
diff --git a/services/core/java/com/android/server/connectivity/NetdEventListenerService.java b/services/core/java/com/android/server/connectivity/NetdEventListenerService.java
index dbc339b..0d31051 100644
--- a/services/core/java/com/android/server/connectivity/NetdEventListenerService.java
+++ b/services/core/java/com/android/server/connectivity/NetdEventListenerService.java
@@ -366,15 +366,18 @@
         }
     }
 
-    public synchronized void listAsProtos(PrintWriter pw) {
+    /**
+     * Convert events in the buffer to protos and add to the given list
+     */
+    public synchronized void listAsProtos(List<IpConnectivityEvent> out) {
         for (int i = 0; i < mNetworkMetrics.size(); i++) {
-            pw.print(IpConnectivityEventBuilder.toProto(mNetworkMetrics.valueAt(i).connectMetrics));
+            out.add(IpConnectivityEventBuilder.toProto(mNetworkMetrics.valueAt(i).connectMetrics));
         }
         for (int i = 0; i < mNetworkMetrics.size(); i++) {
-            pw.print(IpConnectivityEventBuilder.toProto(mNetworkMetrics.valueAt(i).dnsMetrics));
+            out.add(IpConnectivityEventBuilder.toProto(mNetworkMetrics.valueAt(i).dnsMetrics));
         }
         for (int i = 0; i < mWakeupStats.size(); i++) {
-            pw.print(IpConnectivityEventBuilder.toProto(mWakeupStats.valueAt(i)));
+            out.add(IpConnectivityEventBuilder.toProto(mWakeupStats.valueAt(i)));
         }
     }