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Merge "Revert "Add link-related methods at NetlinkUtils"" into main

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Yuyang Huang 2024-10-17 01:22:59 +00:00 • committed by Gerrit Code Review
commit d598ced4a6
1 changed files with 0 additions and 92 deletions
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92
staticlibs/device/com/android/net/module/util/netlink/NetlinkUtils.java
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@ -30,7 +30,6 @@ import static android.system.OsConstants.SO_RCVBUF;
import static android.system.OsConstants.SO_RCVTIMEO;
import static android.system.OsConstants.SO_SNDTIMEO;
import static com.android.net.module.util.netlink.NetlinkConstants.RTM_NEWLINK;
import static com.android.net.module.util.netlink.NetlinkConstants.hexify;
import static com.android.net.module.util.netlink.NetlinkConstants.NLMSG_DONE;
import static com.android.net.module.util.netlink.NetlinkConstants.RTNL_FAMILY_IP6MR;
@ -58,7 +57,6 @@ import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
/**
@ -226,96 +224,6 @@ public class NetlinkUtils {
}
}
/**
* Sends an RTM_NEWLINK message to kernel to set a network interface up or down.
*
* @param ifName The name of the network interface to modify.
* @param isUp {@code true} to set the interface up, {@code false} to set it down.
* @return {@code true} if the request was successfully sent, {@code false} otherwise.
*/
public static boolean sendRtmSetLinkStateRequest(@NonNull String ifName, boolean isUp) {
final RtNetlinkLinkMessage msg = RtNetlinkLinkMessage.createSetLinkStateMessage(
ifName, 1 /*sequenceNumber*/, isUp);
if (msg == null) {
return false;
}
final byte[] bytes = msg.pack(ByteOrder.nativeOrder());
try {
NetlinkUtils.sendOneShotKernelMessage(NETLINK_ROUTE, bytes);
return true;
} catch (ErrnoException e) {
Log.e(TAG, "Fail to set the interface " + ifName + " " + (isUp ? "up" : "down"), e);
return false;
}
}
/**
* Sends an RTM_NEWLINK message to kernel to rename a network interface.
*
* @param ifName The current name of the network interface.
* @param newIfName The new name to assign to the interface.
* @return {@code true} if the request was successfully sent, {@code false} otherwise.
*/
public static boolean sendRtmSetLinkNameRequest(
@NonNull String ifName, @NonNull String newIfName) {
final RtNetlinkLinkMessage msg = RtNetlinkLinkMessage.createSetLinkNameMessage(
ifName, 1 /*sequenceNumber*/, newIfName);
if (msg == null) {
return false;
}
final byte[] bytes = msg.pack(ByteOrder.nativeOrder());
try {
NetlinkUtils.sendOneShotKernelMessage(NETLINK_ROUTE, bytes);
return true;
} catch (ErrnoException e) {
Log.e(TAG, "Fail to rename the interface from " + ifName + " to " + newIfName, e);
return false;
}
}
/**
* Gets the information of a network interface using a Netlink message.
* <p>
* This method sends a Netlink message to the kernel to request information about the specified
* network interface and returns a {@link RtNetlinkLinkMessage} containing the interface status.
*
* @param ifName The name of the network interface to query.
* @return An {@link RtNetlinkLinkMessage} containing the interface status, or {@code null} if
* the interface does not exist or an error occurred during the query.
*/
@Nullable
public static RtNetlinkLinkMessage getLinkRequest(@NonNull String ifName) {
final int ifIndex = new OsAccess().if_nametoindex(ifName);
if (ifIndex == OsAccess.INVALID_INTERFACE_INDEX) {
return null;
}
final AtomicReference<RtNetlinkLinkMessage> recvMsg = new AtomicReference<>();
final Consumer<RtNetlinkLinkMessage> handleNlMsg = (msg) -> {
if (msg.getHeader().nlmsg_type == RTM_NEWLINK
&& msg.getIfinfoHeader().index == ifIndex) {
recvMsg.set(msg);
}
};
final RtNetlinkLinkMessage msg = RtNetlinkLinkMessage.createGetLinkMessage(
ifName, 1 /*sequenceNumber*/);
if (msg == null) {
return null;
}
final byte[] bytes = msg.pack(ByteOrder.nativeOrder());
try {
NetlinkUtils.getAndProcessNetlinkDumpMessages(
bytes, NETLINK_ROUTE, RtNetlinkLinkMessage.class, handleNlMsg);
} catch (SocketException | InterruptedIOException | ErrnoException e) {
// Nothing we can do here.
}
return recvMsg.get();
}
/**
* Create netlink socket with the given netlink protocol type and buffersize.
*