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-rw-r--r--juick-server/src/main/java/com/juick/server/xmpp/s2s/ConnectionIn.java213
1 files changed, 213 insertions, 0 deletions
diff --git a/juick-server/src/main/java/com/juick/server/xmpp/s2s/ConnectionIn.java b/juick-server/src/main/java/com/juick/server/xmpp/s2s/ConnectionIn.java
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index 00000000..9ee81d4d
--- /dev/null
+++ b/juick-server/src/main/java/com/juick/server/xmpp/s2s/ConnectionIn.java
@@ -0,0 +1,213 @@
+/*
+ * Copyright (C) 2008-2017, Juick
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.juick.server.xmpp.s2s;
+
+import com.juick.server.XMPPServer;
+import com.juick.xmpp.extensions.StreamError;
+import com.juick.xmpp.utils.XmlUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+import rocks.xmpp.addr.Jid;
+
+import java.io.EOFException;
+import java.io.IOException;
+import java.net.Socket;
+import java.net.SocketException;
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * @author ugnich
+ */
+public class ConnectionIn extends Connection implements Runnable {
+
+ final public List<Jid> from = new CopyOnWriteArrayList<>();
+ public Instant received;
+ public long packetsRemote = 0;
+ ConnectionListener listener;
+
+ public ConnectionIn(XMPPServer xmpp, Socket socket) throws XmlPullParserException, IOException {
+ super(xmpp);
+ this.setSocket(socket);
+ restartParser();
+ }
+
+ @Override
+ public void run() {
+ 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(String.format("stream from %s invalid", getSocket().getRemoteSocketAddress()));
+ }
+ streamID = parser.getAttributeValue(null, "id");
+ if (streamID == null) {
+ streamID = UUID.randomUUID().toString();
+ }
+ boolean xmppversionnew = parser.getAttributeValue(null, "version") != null;
+ String from = parser.getAttributeValue(null, "from");
+
+ if (Arrays.asList(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.debug("stream from {} to {} {} asking for dialback", dfrom, to, streamID);
+ if (dfrom.endsWith(xmpp.getJid().toEscapedString()) && (dfrom.equals(xmpp.getJid().toEscapedString())
+ || dfrom.endsWith("." + xmpp.getJid()))) {
+ logger.warn("stream from {} is invalid", dfrom);
+ break;
+ }
+ if (to != null && to.equals(xmpp.getJid().toEscapedString())) {
+ String dbKey = XmlUtils.getTagText(parser);
+ updateTsRemoteData();
+ xmpp.startDialback(Jid.of(dfrom), streamID, dbKey);
+ } else {
+ logger.warn("stream from " + dfrom + " " + streamID + " invalid to " + to);
+ break;
+ }
+ } 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();
+ final boolean[] valid = {false};
+ if (vfrom != null && vto != null && vid != null && vkey != null) {
+ xmpp.getConnectionOut(Jid.of(vfrom), false).ifPresent(c -> {
+ String dialbackKey = c.dbKey;
+ valid[0] = vkey.equals(dialbackKey);
+ });
+ }
+ if (valid[0]) {
+ sendStanza("<db:verify from='" + vto + "' to='" + vfrom + "' id='" + vid + "' type='valid'/>");
+ logger.debug("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)) {
+ String xml = XmlUtils.parseToString(parser, false);
+ logger.debug("stream {} presence: {}", streamID, xml);
+ xmpp.onStanzaReceived(xml);
+ } else if (tag.equals("message") && checkFromTo(parser)) {
+ updateTsRemoteData();
+ String xml = XmlUtils.parseToString(parser, false);
+ logger.debug("stream {} message: {}", streamID, xml);
+ xmpp.onStanzaReceived(xml);
+
+ } else if (tag.equals("iq") && checkFromTo(parser)) {
+ updateTsRemoteData();
+ String type = parser.getAttributeValue(null, "type");
+ String xml = XmlUtils.parseToString(parser, false);
+ if (type == null || !type.equals("error")) {
+ logger.debug("stream {} iq: {}", streamID, xml);
+ xmpp.onStanzaReceived(xml);
+ }
+ } else if (!isSecured() && tag.equals("starttls")) {
+ listener.starttls(this);
+ } else if (isSecured() && tag.equals("stream") && parser.getNamespace().equals(NS_STREAM)) {
+ sendOpenStream(null, true);
+ } else if (tag.equals("error")) {
+ StreamError streamError = StreamError.parse(parser);
+ logger.debug("Stream error from {}: {}", streamID, streamError.getCondition());
+ xmpp.removeConnectionIn(this);
+ closeConnection();
+ } 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.debug("stream {} closed (dirty)", streamID);
+ xmpp.removeConnectionIn(this);
+ closeConnection();
+ } catch (Exception e) {
+ logger.debug("stream {} error {}", streamID, e);
+ xmpp.removeConnectionIn(this);
+ closeConnection();
+ }
+ }
+
+ void updateTsRemoteData() {
+ received = Instant.now();
+ }
+
+ 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.getJid().toEscapedString() + "' id='" + streamID + "' version='1.0'>";
+ if (xmppversionnew) {
+ openStream += "<stream:features>";
+ if (listener != null && listener.isTlsAvailable() && !isSecured() && !Arrays.asList(xmpp.brokenSSLhosts).contains(from)) {
+ openStream += "<starttls xmlns=\"" + NS_TLS + "\"><optional/></starttls>";
+ }
+ openStream += "</stream:features>";
+ }
+ sendStanza(openStream);
+ }
+
+ public void sendDialbackResult(Jid sfrom, String type) {
+ sendStanza("<db:result from='" + xmpp.getJid().toEscapedString() + "' to='" + sfrom + "' type='" + type + "'/>");
+ if (type.equals("valid")) {
+ from.add(sfrom);
+ logger.debug("stream from {} {} ready", sfrom, streamID);
+ }
+ }
+
+ boolean checkFromTo(XmlPullParser parser) throws Exception {
+ String cfrom = parser.getAttributeValue(null, "from");
+ String cto = parser.getAttributeValue(null, "to");
+ if (StringUtils.isNotEmpty(cfrom) && StringUtils.isNotEmpty(cto)) {
+ Jid jidfrom = Jid.of(cfrom);
+ for (Jid aFrom : from) {
+ if (aFrom.equals(Jid.of(jidfrom.getDomain()))) {
+ return true;
+ }
+ }
+ }
+ return false;
+ }
+ public void setListener(ConnectionListener listener) {
+ this.listener = listener;
+ }
+}
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