Add NDK API for getprocnetwork
The API is the getter couterpart for setprocnetwork.
Use it in NetworkUtils so that the NDK API can be the source of truth
for the process network.
Bug: 171540887
Test: atest CtsNetTestCases
Tests in change I311b58585033c2ca50ce5477ea9cd94b6f127507
Change-Id: Ie8f68cf1fa57deddb63324c1abf3d6fd5b0ef500
diff --git a/core/jni/Android.bp b/core/jni/Android.bp
index f49a834..f1fa5db 100644
--- a/core/jni/Android.bp
+++ b/core/jni/Android.bp
@@ -238,6 +238,7 @@
"android.hardware.camera.device@3.2",
"media_permission-aidl-cpp",
"libandroidicu",
+ "libandroid_net",
"libbpf_android",
"libnetdbpf",
"libnetdutils",
diff --git a/native/android/libandroid.map.txt b/native/android/libandroid.map.txt
index b01878b..85513ca 100644
--- a/native/android/libandroid.map.txt
+++ b/native/android/libandroid.map.txt
@@ -285,6 +285,7 @@
ATrace_endAsyncSection; # introduced=29
ATrace_setCounter; # introduced=29
android_getaddrinfofornetwork; # introduced=23
+ android_getprocnetwork; # introduced=31
android_setprocnetwork; # introduced=23
android_setsocknetwork; # introduced=23
android_res_cancel; # introduced=29
@@ -309,4 +310,4 @@
ASurfaceControlStats_getAcquireTime*;
ASurfaceControlStats_getFrameNumber*;
};
-} LIBANDROID;
\ No newline at end of file
+} LIBANDROID;
diff --git a/native/android/libandroid_net.map.txt b/native/android/libandroid_net.map.txt
index 8d4e900..cc8dd72 100644
--- a/native/android/libandroid_net.map.txt
+++ b/native/android/libandroid_net.map.txt
@@ -14,6 +14,8 @@
android_res_nquery; # llndk
android_res_nresult; # llndk
android_res_nsend; # llndk
+ # These functions have been part of the NDK since API 31.
+ android_getprocnetwork; # llndk
local:
*;
};
diff --git a/native/android/net.c b/native/android/net.c
index a8104fc..d4b8888 100644
--- a/native/android/net.c
+++ b/native/android/net.c
@@ -22,12 +22,13 @@
#include <stdlib.h>
#include <sys/limits.h>
+// This value MUST be kept in sync with the corresponding value in
+// the android.net.Network#getNetworkHandle() implementation.
+static const uint32_t kHandleMagic = 0xcafed00d;
+static const uint32_t kHandleMagicSize = 32;
static int getnetidfromhandle(net_handle_t handle, unsigned *netid) {
static const uint32_t k32BitMask = 0xffffffff;
- // This value MUST be kept in sync with the corresponding value in
- // the android.net.Network#getNetworkHandle() implementation.
- static const uint32_t kHandleMagic = 0xcafed00d;
// Check for minimum acceptable version of the API in the low bits.
if (handle != NETWORK_UNSPECIFIED &&
@@ -41,6 +42,12 @@
return 1;
}
+static net_handle_t gethandlefromnetid(unsigned netid) {
+ if (netid == NETID_UNSET) {
+ return NETWORK_UNSPECIFIED;
+ }
+ return (((net_handle_t) netid) << kHandleMagicSize) | kHandleMagic;
+}
int android_setsocknetwork(net_handle_t network, int fd) {
unsigned netid;
@@ -72,6 +79,17 @@
return rval;
}
+int android_getprocnetwork(net_handle_t *network) {
+ if (network == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ unsigned netid = getNetworkForProcess();
+ *network = gethandlefromnetid(netid);
+ return 0;
+}
+
int android_getaddrinfofornetwork(net_handle_t network,
const char *node, const char *service,
const struct addrinfo *hints, struct addrinfo **res) {
diff --git a/packages/Connectivity/framework/Android.bp b/packages/Connectivity/framework/Android.bp
index 657d5a3..3553c1f 100644
--- a/packages/Connectivity/framework/Android.bp
+++ b/packages/Connectivity/framework/Android.bp
@@ -128,6 +128,7 @@
srcs: [
"jni/android_net_NetworkUtils.cpp",
],
+ shared_libs: ["libandroid_net"],
apex_available: [
"//apex_available:platform",
"com.android.tethering",
@@ -140,6 +141,7 @@
srcs: [
"jni/onload.cpp",
],
+ shared_libs: ["libandroid"],
static_libs: ["libconnectivityframeworkutils"],
apex_available: [
"//apex_available:platform",
diff --git a/packages/Connectivity/framework/jni/android_net_NetworkUtils.cpp b/packages/Connectivity/framework/jni/android_net_NetworkUtils.cpp
index 19ffe77..89b058a 100644
--- a/packages/Connectivity/framework/jni/android_net_NetworkUtils.cpp
+++ b/packages/Connectivity/framework/jni/android_net_NetworkUtils.cpp
@@ -19,6 +19,7 @@
#include <vector>
#include <android/file_descriptor_jni.h>
+#include <android/multinetwork.h>
#include <arpa/inet.h>
#include <linux/filter.h>
#include <linux/if_arp.h>
@@ -122,14 +123,21 @@
}
}
-static jboolean android_net_utils_bindProcessToNetwork(JNIEnv *env, jobject thiz, jint netId)
+static jboolean android_net_utils_bindProcessToNetworkHandle(JNIEnv *env, jobject thiz,
+ jlong netHandle)
{
- return (jboolean) !setNetworkForProcess(netId);
+ return (jboolean) !android_setprocnetwork(netHandle);
}
-static jint android_net_utils_getBoundNetworkForProcess(JNIEnv *env, jobject thiz)
+static jlong android_net_utils_getBoundNetworkHandleForProcess(JNIEnv *env, jobject thiz)
{
- return getNetworkForProcess();
+ net_handle_t network;
+ if (android_getprocnetwork(&network) != 0) {
+ jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
+ "android_getprocnetwork(): %s", strerror(errno));
+ return NETWORK_UNSPECIFIED;
+ }
+ return (jlong) network;
}
static jboolean android_net_utils_bindProcessToNetworkForHostResolution(JNIEnv *env, jobject thiz,
@@ -283,8 +291,8 @@
// clang-format off
static const JNINativeMethod gNetworkUtilMethods[] = {
/* name, signature, funcPtr */
- { "bindProcessToNetwork", "(I)Z", (void*) android_net_utils_bindProcessToNetwork },
- { "getBoundNetworkForProcess", "()I", (void*) android_net_utils_getBoundNetworkForProcess },
+ { "bindProcessToNetworkHandle", "(J)Z", (void*) android_net_utils_bindProcessToNetworkHandle },
+ { "getBoundNetworkHandleForProcess", "()J", (void*) android_net_utils_getBoundNetworkHandleForProcess },
{ "bindProcessToNetworkForHostResolution", "(I)Z", (void*) android_net_utils_bindProcessToNetworkForHostResolution },
{ "bindSocketToNetwork", "(Ljava/io/FileDescriptor;I)I", (void*) android_net_utils_bindSocketToNetwork },
{ "queryUserAccess", "(II)Z", (void*)android_net_utils_queryUserAccess },
diff --git a/packages/Connectivity/framework/src/android/net/NetworkUtils.java b/packages/Connectivity/framework/src/android/net/NetworkUtils.java
index c0f2628..4c61d40 100644
--- a/packages/Connectivity/framework/src/android/net/NetworkUtils.java
+++ b/packages/Connectivity/framework/src/android/net/NetworkUtils.java
@@ -16,6 +16,8 @@
package android.net;
+import static android.net.ConnectivityManager.NETID_UNSET;
+
import android.compat.annotation.UnsupportedAppUsage;
import android.os.Build;
import android.system.ErrnoException;
@@ -55,6 +57,8 @@
*/
public static native void detachBPFFilter(FileDescriptor fd) throws SocketException;
+ private static native boolean bindProcessToNetworkHandle(long netHandle);
+
/**
* Binds the current process to the network designated by {@code netId}. All sockets created
* in the future (and not explicitly bound via a bound {@link SocketFactory} (see
@@ -63,13 +67,20 @@
* is by design so an application doesn't accidentally use sockets it thinks are still bound to
* a particular {@code Network}. Passing NETID_UNSET clears the binding.
*/
- public native static boolean bindProcessToNetwork(int netId);
+ public static boolean bindProcessToNetwork(int netId) {
+ return bindProcessToNetworkHandle(new Network(netId).getNetworkHandle());
+ }
+
+ private static native long getBoundNetworkHandleForProcess();
/**
* Return the netId last passed to {@link #bindProcessToNetwork}, or NETID_UNSET if
* {@link #unbindProcessToNetwork} has been called since {@link #bindProcessToNetwork}.
*/
- public native static int getBoundNetworkForProcess();
+ public static int getBoundNetworkForProcess() {
+ final long netHandle = getBoundNetworkHandleForProcess();
+ return netHandle == 0L ? NETID_UNSET : Network.fromNetworkHandle(netHandle).getNetId();
+ }
/**
* Binds host resolutions performed by this process to the network designated by {@code netId}.