LineageOS/android_packages_modules_Connectivity
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Remove STOPSHIP but allow seamless Handoff when possible.

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If an address is removed we must reset the connection but
only for the connections associated with that address. For
now we're doing the "all" addresses for a type (IPv6 or IPv4)
in the future we only need to reset a particular addresses
connections.


Bug: 4981919
Change-Id: I97f8071a3ed6f827ed22f32216ca5011bfe6c1d9
This commit is contained in:
Wink Saville
2011-07-13 13:44:13 -07:00
parent c101c56ecc
commit 051a664b14
2 changed files with 164 additions and 32 deletions
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137
core/java/android/net/LinkProperties.java
View File

@@ -52,11 +52,26 @@ import java.util.Collections;
public class LinkProperties implements Parcelable {
String mIfaceName;
private Collection<LinkAddress> mLinkAddresses;
private Collection<InetAddress> mDnses;
private Collection<RouteInfo> mRoutes;
private Collection<LinkAddress> mLinkAddresses = new ArrayList<LinkAddress>();
private Collection<InetAddress> mDnses = new ArrayList<InetAddress>();
private Collection<RouteInfo> mRoutes = new ArrayList<RouteInfo>();
private ProxyProperties mHttpProxy;
public static class CompareAddressesResult {
public ArrayList<LinkAddress> removed = new ArrayList<LinkAddress>();
public ArrayList<LinkAddress> added = new ArrayList<LinkAddress>();
@Override
public String toString() {
String retVal = "removedAddresses=[";
for (LinkAddress addr : removed) retVal += addr.toString() + ",";
retVal += "] addedAddresses=[";
for (LinkAddress addr : added) retVal += addr.toString() + ",";
retVal += "]";
return retVal;
}
}
public LinkProperties() {
clear();
}
@@ -121,9 +136,9 @@ public class LinkProperties implements Parcelable {
public void clear() {
mIfaceName = null;
mLinkAddresses = new ArrayList<LinkAddress>();
mDnses = new ArrayList<InetAddress>();
mRoutes = new ArrayList<RouteInfo>();
mLinkAddresses.clear();
mDnses.clear();
mRoutes.clear();
mHttpProxy = null;
}
@@ -155,6 +170,63 @@ public class LinkProperties implements Parcelable {
return ifaceName + linkAddresses + routes + dns + proxy;
}
/**
* Compares this {@code LinkProperties} interface name against the target
*
* @param target LinkProperties to compare.
* @return {@code true} if both are identical, {@code false} otherwise.
*/
public boolean isIdenticalInterfaceName(LinkProperties target) {
return TextUtils.equals(getInterfaceName(), target.getInterfaceName());
}
/**
* Compares this {@code LinkProperties} interface name against the target
*
* @param target LinkProperties to compare.
* @return {@code true} if both are identical, {@code false} otherwise.
*/
public boolean isIdenticalAddresses(LinkProperties target) {
Collection<InetAddress> targetAddresses = target.getAddresses();
Collection<InetAddress> sourceAddresses = getAddresses();
return (sourceAddresses.size() == targetAddresses.size()) ?
sourceAddresses.containsAll(targetAddresses) : false;
}
/**
* Compares this {@code LinkProperties} DNS addresses against the target
*
* @param target LinkProperties to compare.
* @return {@code true} if both are identical, {@code false} otherwise.
*/
public boolean isIdenticalDnses(LinkProperties target) {
Collection<InetAddress> targetDnses = target.getDnses();
return (mDnses.size() == targetDnses.size()) ?
mDnses.containsAll(targetDnses) : false;
}
/**
* Compares this {@code LinkProperties} Routes against the target
*
* @param target LinkProperties to compare.
* @return {@code true} if both are identical, {@code false} otherwise.
*/
public boolean isIdenticalRoutes(LinkProperties target) {
Collection<RouteInfo> targetRoutes = target.getRoutes();
return (mRoutes.size() == targetRoutes.size()) ?
mRoutes.containsAll(targetRoutes) : false;
}
/**
* Compares this {@code LinkProperties} HttpProxy against the target
*
* @param target LinkProperties to compare.
* @return {@code true} if both are identical, {@code false} otherwise.
*/
public boolean isIdenticalHttpProxy(LinkProperties target) {
return getHttpProxy() == null ? target.getHttpProxy() == null :
getHttpProxy().equals(target.getHttpProxy());
}
@Override
/**
@@ -176,30 +248,41 @@ public class LinkProperties implements Parcelable {
if (!(obj instanceof LinkProperties)) return false;
boolean sameAddresses;
boolean sameDnses;
boolean sameRoutes;
LinkProperties target = (LinkProperties) obj;
Collection<InetAddress> targetAddresses = target.getAddresses();
Collection<InetAddress> sourceAddresses = getAddresses();
sameAddresses = (sourceAddresses.size() == targetAddresses.size()) ?
sourceAddresses.containsAll(targetAddresses) : false;
return isIdenticalInterfaceName(target) &&
isIdenticalAddresses(target) &&
isIdenticalDnses(target) &&
isIdenticalRoutes(target) &&
isIdenticalHttpProxy(target);
}
Collection<InetAddress> targetDnses = target.getDnses();
sameDnses = (mDnses.size() == targetDnses.size()) ?
mDnses.containsAll(targetDnses) : false;
Collection<RouteInfo> targetRoutes = target.getRoutes();
sameRoutes = (mRoutes.size() == targetRoutes.size()) ?
mRoutes.containsAll(targetRoutes) : false;
return
sameAddresses && sameDnses && sameRoutes
&& TextUtils.equals(getInterfaceName(), target.getInterfaceName())
&& (getHttpProxy() == null ? target.getHttpProxy() == null :
getHttpProxy().equals(target.getHttpProxy()));
/**
* Return two lists, a list of addresses that would be removed from
* mLinkAddresses and a list of addresses that would be added to
* mLinkAddress which would then result in target and mLinkAddresses
* being the same list.
*
* @param target is a new list of addresses
* @return the removed and added lists.
*/
public CompareAddressesResult compareAddresses(LinkProperties target) {
/*
* Duplicate the LinkAddresses into removed, we will be removing
* address which are common between mLinkAddresses and target
* leaving the addresses that are different. And address which
* are in target but not in mLinkAddresses are placed in the
* addedAddresses.
*/
CompareAddressesResult result = new CompareAddressesResult();
result.removed = new ArrayList<LinkAddress>(mLinkAddresses);
result.added.clear();
for (LinkAddress newAddress : target.getLinkAddresses()) {
if (! result.removed.remove(newAddress)) {
result.added.add(newAddress);
}
}
return result;
}
@Override

59
services/java/com/android/server/ConnectivityService.java
View File

@@ -28,6 +28,7 @@ import android.net.EthernetDataTracker;
import android.net.IConnectivityManager;
import android.net.LinkAddress;
import android.net.LinkProperties;
import android.net.LinkProperties.CompareAddressesResult;
import android.net.MobileDataStateTracker;
import android.net.NetworkConfig;
import android.net.NetworkInfo;
@@ -61,6 +62,7 @@ import java.io.FileDescriptor;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.UnknownHostException;
@@ -76,6 +78,7 @@ import java.util.List;
public class ConnectivityService extends IConnectivityManager.Stub {
private static final boolean DBG = true;
private static final boolean VDBG = true;
private static final String TAG = "ConnectivityService";
// how long to wait before switching back to a radio's default network
@@ -98,6 +101,11 @@ public class ConnectivityService extends IConnectivityManager.Stub {
*/
private NetworkStateTracker mNetTrackers[];
/**
* The link properties that define the current links
*/
private LinkProperties mCurrentLinkProperties[];
/**
* A per Net list of the PID's that requested access to the net
* used both as a refcount and for per-PID DNS selection
@@ -302,6 +310,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
mNetTrackers = new NetworkStateTracker[
ConnectivityManager.MAX_NETWORK_TYPE+1];
mCurrentLinkProperties = new LinkProperties[ConnectivityManager.MAX_NETWORK_TYPE+1];
mNetworkPreference = getPersistedNetworkPreference();
@@ -442,6 +451,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
mNetConfigs[netType].radio);
continue;
}
mCurrentLinkProperties[netType] = mNetTrackers[netType].getLinkProperties();
}
mTethering = new Tethering(mContext, mHandler.getLooper());
@@ -1409,6 +1419,8 @@ public class ConnectivityService extends IConnectivityManager.Stub {
* right routing table entries exist.
*/
private void handleConnectivityChange(int netType, boolean doReset) {
int resetMask = doReset ? NetworkUtils.RESET_ALL_ADDRESSES : 0;
/*
* If a non-default network is enabled, add the host routes that
* will allow it's DNS servers to be accessed.
@@ -1416,6 +1428,45 @@ public class ConnectivityService extends IConnectivityManager.Stub {
handleDnsConfigurationChange(netType);
if (mNetTrackers[netType].getNetworkInfo().isConnected()) {
LinkProperties newLp = mNetTrackers[netType].getLinkProperties();
LinkProperties curLp = mCurrentLinkProperties[netType];
mCurrentLinkProperties[netType] = newLp;
if (VDBG) {
log("handleConnectivityChange: changed linkProperty[" + netType + "]:" +
" doReset=" + doReset + " resetMask=" + resetMask +
"\n curLp=" + curLp +
"\n newLp=" + newLp);
}
if (curLp.isIdenticalInterfaceName(newLp)) {
CompareAddressesResult car = curLp.compareAddresses(newLp);
if ((car.removed.size() != 0) || (car.added.size() != 0)) {
for (LinkAddress linkAddr : car.removed) {
if (linkAddr.getAddress() instanceof Inet4Address) {
resetMask |= NetworkUtils.RESET_IPV4_ADDRESSES;
}
if (linkAddr.getAddress() instanceof Inet6Address) {
resetMask |= NetworkUtils.RESET_IPV6_ADDRESSES;
}
}
if (DBG) {
log("handleConnectivityChange: addresses changed" +
" linkProperty[" + netType + "]:" + " resetMask=" + resetMask +
"\n car=" + car);
}
} else {
if (DBG) {
log("handleConnectivityChange: address are the same reset per doReset" +
" linkProperty[" + netType + "]:" +
" resetMask=" + resetMask);
}
}
} else {
resetMask = NetworkUtils.RESET_ALL_ADDRESSES;
log("handleConnectivityChange: interface not not equivalent reset both" +
" linkProperty[" + netType + "]:" +
" resetMask=" + resetMask);
}
if (mNetConfigs[netType].isDefault()) {
handleApplyDefaultProxy(netType);
addDefaultRoute(mNetTrackers[netType]);
@@ -1430,15 +1481,13 @@ public class ConnectivityService extends IConnectivityManager.Stub {
}
}
if (doReset) {
if (doReset || resetMask != 0) {
LinkProperties linkProperties = mNetTrackers[netType].getLinkProperties();
if (linkProperties != null) {
String iface = linkProperties.getInterfaceName();
if (TextUtils.isEmpty(iface) == false) {
if (DBG) {
log("resetConnections(" + iface + ", NetworkUtils.RESET_ALL_ADDRESSES)");
}
NetworkUtils.resetConnections(iface, NetworkUtils.RESET_ALL_ADDRESSES);
if (DBG) log("resetConnections(" + iface + ", " + resetMask + ")");
NetworkUtils.resetConnections(iface, resetMask);
}
}
}