Merge "Use IPv6 hop limit from upstream interface." (53f6d1b0) · Commits · e / os / android_frameworks_base

services/net/java/android/net/ip/IpServer.java

+16 −0

Original line number	Diff line number	Diff line
		@@ -430,6 +430,8 @@ public class IpServer extends StateMachine {
		params.mtu = v6only.getMtu();
		params.hasDefaultRoute = v6only.hasIPv6DefaultRoute();

		if (params.hasDefaultRoute) params.hopLimit = getHopLimit(v6only.getInterfaceName());

		for (LinkAddress linkAddr : v6only.getLinkAddresses()) {
		if (linkAddr.getPrefixLength() != RFC7421_PREFIX_LENGTH) continue;

		@@ -549,6 +551,20 @@ public class IpServer extends StateMachine {
		}
		}

		private byte getHopLimit(String upstreamIface) {
		try {
		int upstreamHopLimit = Integer.parseUnsignedInt(
		mNetd.getProcSysNet(INetd.IPV6, INetd.CONF, upstreamIface, "hop_limit"));
		// Add one hop to account for this forwarding device
		upstreamHopLimit++;
		// Cap the hop limit to 255.
		return (byte) Integer.min(upstreamHopLimit, 255);
		} catch (Exception e) {
		mLog.e("Failed to find upstream interface hop limit", e);
		}
		return RaParams.DEFAULT_HOPLIMIT;
		}

		private void setRaParams(RaParams newParams) {
		if (mRaDaemon != null) {
		final RaParams deprecatedParams =