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authorDaniel Gultsch <daniel.gultsch@rwth-aachen.de>2014-01-30 16:42:35 +0100
committerDaniel Gultsch <daniel.gultsch@rwth-aachen.de>2014-01-30 16:42:35 +0100
commit6c5c3ac2decac75ec3208d47912e67c4e1a33548 (patch)
treec6cdcc5d76608369da08eb76891c48ffefbb9a48 /src/de/gultsch/chat/xmpp/XmppConnection.java
parentad11dab6359a1eb2b6921d36117093066999fb96 (diff)
first draft on xml parser and communication. a long way to go. code definitly not perfect. will refactor asap
Diffstat (limited to 'src/de/gultsch/chat/xmpp/XmppConnection.java')
-rw-r--r--src/de/gultsch/chat/xmpp/XmppConnection.java222
1 files changed, 222 insertions, 0 deletions
diff --git a/src/de/gultsch/chat/xmpp/XmppConnection.java b/src/de/gultsch/chat/xmpp/XmppConnection.java
new file mode 100644
index 00000000..942033a1
--- /dev/null
+++ b/src/de/gultsch/chat/xmpp/XmppConnection.java
@@ -0,0 +1,222 @@
+package de.gultsch.chat.xmpp;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.math.BigInteger;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.security.SecureRandom;
+
+import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
+
+import org.xmlpull.v1.XmlPullParserException;
+
+import android.os.PowerManager;
+import android.util.Log;
+import de.gultsch.chat.entities.Account;
+import de.gultsch.chat.utils.SASL;
+import de.gultsch.chat.xml.Element;
+import de.gultsch.chat.xml.Tag;
+import de.gultsch.chat.xml.XmlReader;
+import de.gultsch.chat.xml.TagWriter;
+
+public class XmppConnection implements Runnable {
+
+ protected Account account;
+ private static final String LOGTAG = "xmppService";
+
+ private PowerManager.WakeLock wakeLock;
+
+ private SecureRandom random = new SecureRandom();
+
+ private Socket socket;
+ private XmlReader tagReader;
+ private TagWriter tagWriter;
+
+ private boolean isTlsEncrypted = false;
+ private boolean isAuthenticated = false;
+
+ public XmppConnection(Account account, PowerManager pm) {
+ this.account = account;
+ wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
+ "XmppConnection");
+ tagReader = new XmlReader(wakeLock);
+ tagWriter = new TagWriter();
+ }
+
+ protected void connect() {
+ try {
+ socket = new Socket(account.getServer(), 5222);
+ Log.d(LOGTAG, "starting new socket");
+ OutputStream out = socket.getOutputStream();
+ tagWriter.setOutputStream(out);
+ InputStream in = socket.getInputStream();
+ tagReader.setInputStream(in);
+ } catch (UnknownHostException e) {
+ Log.d(LOGTAG, "error during connect. unknown host");
+ } catch (IOException e) {
+ Log.d(LOGTAG, "error during connect. io exception. falscher port?");
+ }
+ }
+
+ @Override
+ public void run() {
+ connect();
+ try {
+ tagWriter.beginDocument();
+ sendStartStream();
+ Tag nextTag;
+ while ((nextTag = tagReader.readTag()) != null) {
+ if (nextTag.isStart("stream")) {
+ processStream(nextTag);
+ } else {
+ Log.d(LOGTAG, "found unexpected tag: " + nextTag.getName());
+ }
+ }
+ } catch (XmlPullParserException e) {
+ Log.d(LOGTAG,
+ "xml error during normal read. maybe missformed xml? "
+ + e.getMessage());
+ } catch (IOException e) {
+ Log.d(LOGTAG, "io exception during read. connection lost?");
+ }
+ }
+
+ private void processStream(Tag currentTag) throws XmlPullParserException,
+ IOException {
+ Log.d(LOGTAG, "process Stream");
+ Tag nextTag;
+ while ((nextTag = tagReader.readTag()) != null) {
+ if (nextTag.isStart("error")) {
+ processStreamError(nextTag);
+ } else if (nextTag.isStart("features")) {
+ processStreamFeatures(nextTag);
+ if (!isTlsEncrypted) {
+ sendStartTLS();
+ }
+ if ((!isAuthenticated) && (isTlsEncrypted)) {
+ sendSaslAuth();
+ }
+ if ((isAuthenticated)&&(isTlsEncrypted)) {
+ sendBindRequest();
+ }
+ } else if (nextTag.isStart("proceed")) {
+ switchOverToTls(nextTag);
+ } else if (nextTag.isStart("success")) {
+ isAuthenticated = true;
+ Log.d(LOGTAG,"read success tag in stream. reset again");
+ tagReader.readTag();
+ tagReader.reset();
+ sendStartStream();
+ processStream(tagReader.readTag());
+ } else if (nextTag.isStart("iq")) {
+ processIq(nextTag);
+ } else if (nextTag.isEnd("stream")) {
+ break;
+ } else {
+ Log.d(LOGTAG, "found unexpected tag: " + nextTag.getName()
+ + " as child of " + currentTag.getName());
+ }
+ }
+ }
+
+ private void processIq(Tag currentTag) throws XmlPullParserException, IOException {
+ int typ = -1;
+ if (currentTag.getAttribute("type").equals("result")) {
+ typ = IqPacket.TYPE_RESULT;
+ }
+ IqPacket iq = new IqPacket(currentTag.getAttribute("id"),typ);
+ Tag nextTag = tagReader.readTag();
+ while(!nextTag.isEnd("iq")) {
+ Element element = tagReader.readElement(nextTag);
+ iq.addChild(element);
+ nextTag = tagReader.readTag();
+ }
+ Log.d(LOGTAG,"this is what i understood: "+iq.toString());
+ }
+
+ private void sendStartTLS() throws XmlPullParserException, IOException {
+ Tag startTLS = Tag.empty("starttls");
+ startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
+ Log.d(LOGTAG, "sending starttls");
+ tagWriter.writeTag(startTLS).flush();
+ }
+
+ private void switchOverToTls(Tag currentTag) throws XmlPullParserException,
+ IOException {
+ Tag nextTag = tagReader.readTag(); // should be proceed end tag
+ Log.d(LOGTAG, "now switch to ssl");
+ SSLSocket sslSocket;
+ try {
+ sslSocket = (SSLSocket) ((SSLSocketFactory) SSLSocketFactory
+ .getDefault()).createSocket(socket, socket.getInetAddress()
+ .getHostAddress(), socket.getPort(), true);
+ tagReader.setInputStream(sslSocket.getInputStream());
+ Log.d(LOGTAG, "reset inputstream");
+ tagWriter.setOutputStream(sslSocket.getOutputStream());
+ Log.d(LOGTAG, "switch over seemed to work");
+ isTlsEncrypted = true;
+ sendStartStream();
+ processStream(tagReader.readTag());
+ } catch (IOException e) {
+ Log.d(LOGTAG, "error on ssl" + e.getMessage());
+ }
+ }
+
+ private void sendSaslAuth() throws IOException, XmlPullParserException {
+ String saslString = SASL.plain(account.getUsername(),
+ account.getPassword());
+ Element auth = new Element("auth");
+ auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
+ auth.setAttribute("mechanism", "PLAIN");
+ auth.setContent(saslString);
+ Log.d(LOGTAG,"sending sasl "+auth.toString());
+ tagWriter.writeElement(auth);
+ tagWriter.flush();
+ }
+
+ private void processStreamFeatures(Tag currentTag)
+ throws XmlPullParserException, IOException {
+ Log.d(LOGTAG, "processStreamFeatures");
+
+ Element streamFeatures = new Element("features");
+
+ Tag nextTag = tagReader.readTag();
+ while(!nextTag.isEnd("features")) {
+ Element element = tagReader.readElement(nextTag);
+ streamFeatures.addChild(element);
+ nextTag = tagReader.readTag();
+ }
+ }
+
+ private void sendBindRequest() throws IOException {
+ IqPacket iq = new IqPacket(nextRandomId(),IqPacket.TYPE_SET);
+ Element bind = new Element("bind");
+ bind.setAttribute("xmlns","urn:ietf:params:xml:ns:xmpp-bind");
+ iq.addChild(bind);
+ Log.d(LOGTAG,"sending bind request: "+iq.toString());
+ tagWriter.writeElement(iq);
+ tagWriter.flush();
+ }
+
+ private void processStreamError(Tag currentTag) {
+ Log.d(LOGTAG, "processStreamError");
+ }
+
+ private void sendStartStream() throws IOException {
+ Tag stream = Tag.start("stream");
+ stream.setAttribute("from", account.getJid());
+ stream.setAttribute("to", account.getServer());
+ stream.setAttribute("version", "1.0");
+ stream.setAttribute("xml:lang", "en");
+ stream.setAttribute("xmlns", "jabber:client");
+ stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
+ tagWriter.writeTag(stream).flush();
+ }
+
+ private String nextRandomId() {
+ return new BigInteger(50, random).toString(32);
+ }
+}