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package com.juick.components.s2s;
import com.juick.components.XMPPServer;
import com.juick.xmpp.Iq;
import com.juick.xmpp.JID;
import com.juick.xmpp.Message;
import com.juick.xmpp.Presence;
import com.juick.xmpp.utils.XmlUtils;
import org.xmlpull.v1.XmlPullParser;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSocket;
import java.io.EOFException;
import java.io.IOException;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
/**
* @author ugnich
*/
public class ConnectionIn extends Connection implements Runnable {
final public List<String> from = new ArrayList<>();
public long tsRemoteData = 0;
public long packetsRemote = 0;
public ConnectionIn(XMPPServer xmpp, Socket socket) throws Exception {
super(xmpp);
this.socket = socket;
streamID = UUID.randomUUID().toString();
restartParser();
}
@Override
public void run() {
logger.info("stream from ? {} start", streamID);
try {
parser.next(); // stream:stream
updateTsRemoteData();
if (!parser.getName().equals("stream")
|| !parser.getNamespace("stream").equals(NS_STREAM)) {
// || !parser.getAttributeValue(null, "version").equals("1.0")
// || !parser.getAttributeValue(null, "to").equals(Main.HOSTNAME)) {
throw new Exception("stream from ? " + streamID + " invalid first packet");
}
boolean xmppversionnew = parser.getAttributeValue(null, "version") != null;
String from = parser.getAttributeValue(null, "from");
if (xmpp.bannedHosts.contains(from)) {
closeConnection();
return;
}
sendOpenStream(from, xmppversionnew);
while (parser.next() != XmlPullParser.END_DOCUMENT) {
updateTsRemoteData();
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
logParser();
packetsRemote++;
String tag = parser.getName();
if (tag.equals("result") && parser.getNamespace().equals(NS_DB)) {
String dfrom = parser.getAttributeValue(null, "from");
String to = parser.getAttributeValue(null, "to");
logger.info("stream from {} to {} {} asking for dialback", dfrom, to, streamID);
if (dfrom.endsWith(xmpp.HOSTNAME) && (dfrom.equals(xmpp.HOSTNAME) || dfrom.endsWith("." + xmpp.HOSTNAME))) {
break;
}
if (to != null && to.equals(xmpp.HOSTNAME)) {
String dbKey = XmlUtils.getTagText(parser);
updateTsRemoteData();
xmpp.startDialback(dfrom, streamID, dbKey);
} else {
throw new HostUnknownException("stream from " + dfrom + " " + streamID + " invalid to " + to);
}
} else if (tag.equals("verify") && parser.getNamespace().equals(NS_DB)) {
String vfrom = parser.getAttributeValue(null, "from");
String vto = parser.getAttributeValue(null, "to");
String vid = parser.getAttributeValue(null, "id");
String vkey = XmlUtils.getTagText(parser);
updateTsRemoteData();
boolean valid = false;
if (vfrom != null && vto != null && vid != null && vkey != null) {
String dialbackKey = xmpp.getConnectionOut(vfrom, false).dbKey;
valid = vkey.equals(dialbackKey);
}
if (valid) {
sendStanza("<db:verify from='" + vto + "' to='" + vfrom + "' id='" + vid + "' type='valid'/>");
logger.info("stream from {} {} dialback verify valid", vfrom, streamID);
} else {
sendStanza("<db:verify from='" + vto + "' to='" + vfrom + "' id='" + vid + "' type='invalid'/>");
logger.warn("stream from {} {} dialback verify invalid", vfrom, streamID);
}
} else if (tag.equals("presence") && checkFromTo(parser)) {
Presence p = Presence.parse(parser, null);
xmpp.onStanzaReceived("presence", p);
} else if (tag.equals("message") && checkFromTo(parser)) {
updateTsRemoteData();
Message msg = Message.parse(parser, xmpp.childParsers);
if (msg != null && (msg.type == null || !msg.type.equals(Message.Type.error))) {
logger.info("stream {}: {}", streamID, msg);
xmpp.onStanzaReceived("message", msg);
}
} else if (tag.equals("iq") && checkFromTo(parser)) {
updateTsRemoteData();
String type = parser.getAttributeValue(null, "type");
String xml = XmlUtils.parseToString(parser, true);
if (type == null || !type.equals(Iq.Type.error)) {
logger.info("stream {}: {}", streamID, xml);
xmpp.getRouter().sendStanza(xml);
}
} else if (sc != null && !isSecured() && tag.equals("starttls")) {
logger.info("stream {} securing", streamID);
sendStanza("<proceed xmlns=\"" + NS_TLS + "\" />");
try {
socket = sc.getSocketFactory().createSocket(socket, socket.getInetAddress().getHostAddress(),
socket.getPort(), true);
((SSLSocket) socket).setUseClientMode(false);
((SSLSocket) socket).startHandshake();
setSecured(true);
logger.info("stream {} secured", streamID);
restartParser();
} catch (SSLException sex) {
logger.warn("stream {} ssl error {}", streamID, sex);
sendStanza("<failed xmlns\"" + NS_TLS + "\" />");
xmpp.removeConnectionIn(this);
closeConnection();
}
} else if (isSecured() && tag.equals("stream") && parser.getNamespace().equals(NS_STREAM)) {
sendOpenStream(null, true);
} else {
String unhandledStanza = XmlUtils.parseToString(parser, true);
logger.warn("Unhandled stanza from {}: {}", streamID, unhandledStanza);
}
}
logger.warn("stream {} finished", streamID);
xmpp.removeConnectionIn(this);
closeConnection();
} catch (EOFException | SocketException ex) {
logger.info("stream {} closed (dirty)", streamID);
xmpp.removeConnectionIn(this);
closeConnection();
} catch (HostUnknownException e) {
logger.warn(e.getMessage());
} catch (Exception e) {
logger.warn("stream {} error {}", streamID, e);
xmpp.removeConnectionIn(this);
closeConnection();
}
}
void updateTsRemoteData() {
tsRemoteData = System.currentTimeMillis();
}
void sendOpenStream(String from, boolean xmppversionnew) throws IOException {
String openStream = "<?xml version='1.0'?><stream:stream xmlns='jabber:server' " +
"xmlns:stream='http://etherx.jabber.org/streams' xmlns:db='jabber:server:dialback' from='" +
xmpp.HOSTNAME + "' id='" + streamID + "' version='1.0'>";
if (xmppversionnew) {
openStream += "<stream:features>";
if (sc != null && !isSecured() && !xmpp.brokenSSLhosts.contains(from)) {
openStream += "<starttls xmlns=\"" + NS_TLS + "\"><optional/></starttls>";
}
openStream += "</stream:features>";
}
sendStanza(openStream);
}
public void sendDialbackResult(String sfrom, String type) {
sendStanza("<db:result from='" + xmpp.HOSTNAME + "' to='" + sfrom + "' type='" + type + "'/>");
if (type.equals("valid")) {
from.add(sfrom);
logger.info("stream from {} {} ready", sfrom, streamID);
}
}
boolean checkFromTo(XmlPullParser parser) throws Exception {
String cfrom = parser.getAttributeValue(null, "from");
String cto = parser.getAttributeValue(null, "to");
if (cfrom != null && cto != null && !cfrom.isEmpty() && !cto.isEmpty()) {
JID jidto = new JID(cto);
if (jidto.Host != null && jidto.Username != null && jidto.Host.equals(xmpp.HOSTNAME) && jidto.Username.matches("^[a-zA-Z0-9\\-]{2,16}$")) {
JID jidfrom = new JID(cfrom);
int size = from.size();
for (int i = 0; i < size; i++) {
if (from.get(i).equals(jidfrom.Host)) {
return true;
}
}
}
}
return false;
}
class HostUnknownException extends Exception {
public HostUnknownException(String message) {
super(message);
}
}
}
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