ClatCoordinator: dump BPF forwarding rules
This is a preparation for moving clat map dump from netd to
mainline module.
Test: compare dumpsys connectivity and netd
$ adb shell dumpsys connectivity
Nat464Xlat:
ClatCoordinator:
Forwarding rules:
BPF ingress map: iif nat64Prefix v6Addr -> v4Addr oif
47 /64:ff9b::/96 /2a00:79e1:abc:6f02:4aac:17dd:b40e:8bcc -> /192.0.0.4 52
BPF egress map: iif v4Addr -> v6Addr nat64Prefix oif
52 /192.0.0.4 -> /2a00:79e1:abc:6f02:4aac:17dd:b40e:8bcc /64:ff9b::/96 47 ether
$ adb shell dumpsys netd
ClatdController
BPF ingress map: iif(iface) nat64Prefix v6Addr -> v4Addr oif(iface)
47(wlan0) 64:ff9b::/96 2a00:79e1:abc:6f02:4aac:17dd:b40e:8bcc -> 192.0.0.4 52(v4-wlan0)
BPF egress map: iif(iface) v4Addr -> v6Addr nat64Prefix oif(iface)
52(v4-wlan0) 192.0.0.4 -> 2a00:79e1:abc:6f02:4aac:17dd:b40e:8bcc 64:ff9b::/96 47(wlan0) ether
Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2017317
Merged-In: I597709663477b62005b0bc5cc1bf0fc22743e10b
Change-Id: I597709663477b62005b0bc5cc1bf0fc22743e10b
Signed-off-by: Nucca Chen <nuccachen@google.com>
(cherry picked from commit 8be50a6d905d1d6810c0c148ba50f8bef614cde9)
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 843d33d..6de6625 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -3431,6 +3431,10 @@
pw.increaseIndent();
nai.dumpInactivityTimers(pw);
pw.decreaseIndent();
+ pw.println("Nat464Xlat:");
+ pw.increaseIndent();
+ nai.dumpNat464Xlat(pw);
+ pw.decreaseIndent();
pw.decreaseIndent();
}
}
diff --git a/service/src/com/android/server/connectivity/ClatCoordinator.java b/service/src/com/android/server/connectivity/ClatCoordinator.java
index cc81522..4a7c77a 100644
--- a/service/src/com/android/server/connectivity/ClatCoordinator.java
+++ b/service/src/com/android/server/connectivity/ClatCoordinator.java
@@ -36,6 +36,7 @@
import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
import com.android.modules.utils.build.SdkLevel;
import com.android.net.module.util.BpfMap;
import com.android.net.module.util.IBpfMap;
@@ -742,6 +743,69 @@
mClatdTracker = null;
}
+ private void dumpBpfIngress(@NonNull IndentingPrintWriter pw) {
+ if (mIngressMap == null) {
+ pw.println("No BPF ingress6 map");
+ return;
+ }
+
+ try {
+ if (mIngressMap.isEmpty()) {
+ pw.println("<empty>");
+ }
+ pw.println("BPF ingress map: iif nat64Prefix v6Addr -> v4Addr oif");
+ pw.increaseIndent();
+ mIngressMap.forEach((k, v) -> {
+ // TODO: print interface name
+ pw.println(String.format("%d %s/96 %s -> %s %d", k.iif, k.pfx96, k.local6,
+ v.local4, v.oif));
+ });
+ pw.decreaseIndent();
+ } catch (ErrnoException e) {
+ pw.println("Error dumping BPF ingress6 map: " + e);
+ }
+ }
+
+ private void dumpBpfEgress(@NonNull IndentingPrintWriter pw) {
+ if (mEgressMap == null) {
+ pw.println("No BPF egress4 map");
+ return;
+ }
+
+ try {
+ if (mEgressMap.isEmpty()) {
+ pw.println("<empty>");
+ }
+ pw.println("BPF egress map: iif v4Addr -> v6Addr nat64Prefix oif");
+ pw.increaseIndent();
+ mEgressMap.forEach((k, v) -> {
+ // TODO: print interface name
+ pw.println(String.format("%d %s -> %s %s/96 %d %s", k.iif, k.local4, v.local6,
+ v.pfx96, v.oif, v.oifIsEthernet != 0 ? "ether" : "rawip"));
+ });
+ pw.decreaseIndent();
+ } catch (ErrnoException e) {
+ pw.println("Error dumping BPF egress4 map: " + e);
+ }
+ }
+
+ /**
+ * Dump the cordinator information.
+ *
+ * @param pw print writer.
+ */
+ public void dump(@NonNull IndentingPrintWriter pw) {
+ // TODO: dump ClatdTracker
+ // TODO: move map dump to a global place to avoid duplicate dump while there are two or
+ // more IPv6 only networks.
+ pw.println("Forwarding rules:");
+ pw.increaseIndent();
+ dumpBpfIngress(pw);
+ dumpBpfEgress(pw);
+ pw.decreaseIndent();
+ pw.println();
+ }
+
/**
* Get clatd tracker. For test only.
*/
diff --git a/service/src/com/android/server/connectivity/Nat464Xlat.java b/service/src/com/android/server/connectivity/Nat464Xlat.java
index 35e02ca..e8fc06d 100644
--- a/service/src/com/android/server/connectivity/Nat464Xlat.java
+++ b/service/src/com/android/server/connectivity/Nat464Xlat.java
@@ -36,6 +36,7 @@
import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
import com.android.modules.utils.build.SdkLevel;
import com.android.net.module.util.NetworkStackConstants;
import com.android.server.ConnectivityService;
@@ -526,6 +527,24 @@
mNetwork.handler().post(() -> handleInterfaceRemoved(iface));
}
+ /**
+ * Dump the NAT64 xlat information.
+ *
+ * @param pw print writer.
+ */
+ public void dump(IndentingPrintWriter pw) {
+ if (SdkLevel.isAtLeastT()) {
+ if (isStarted()) {
+ pw.println("ClatCoordinator:");
+ pw.increaseIndent();
+ mClatCoordinator.dump(pw);
+ pw.decreaseIndent();
+ } else {
+ pw.println("<not start>");
+ }
+ }
+ }
+
@Override
public String toString() {
return "mBaseIface: " + mBaseIface + ", mIface: " + mIface + ", mState: " + mState;
diff --git a/service/src/com/android/server/connectivity/NetworkAgentInfo.java b/service/src/com/android/server/connectivity/NetworkAgentInfo.java
index 1fc5a8f..323888a 100644
--- a/service/src/com/android/server/connectivity/NetworkAgentInfo.java
+++ b/service/src/com/android/server/connectivity/NetworkAgentInfo.java
@@ -59,6 +59,7 @@
import android.util.Pair;
import android.util.SparseArray;
+import com.android.internal.util.IndentingPrintWriter;
import com.android.internal.util.WakeupMessage;
import com.android.modules.utils.build.SdkLevel;
import com.android.server.ConnectivityService;
@@ -1186,6 +1187,15 @@
}
/**
+ * Dump the NAT64 xlat information.
+ *
+ * @param pw print writer.
+ */
+ public void dumpNat464Xlat(IndentingPrintWriter pw) {
+ clatd.dump(pw);
+ }
+
+ /**
* Sets the most recent ConnectivityReport for this network.
*
* <p>This should only be called from the ConnectivityService thread.