conversations-classic/src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
2014-04-21 12:03:26 +02:00

575 lines
19 KiB
Java

package eu.siacs.conversations.xmpp.jingle;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import android.util.Log;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.OnIqPacketReceived;
import eu.siacs.conversations.xmpp.jingle.stanzas.Content;
import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
import eu.siacs.conversations.xmpp.stanzas.IqPacket;
public class JingleConnection {
private JingleConnectionManager mJingleConnectionManager;
private XmppConnectionService mXmppConnectionService;
public static final int STATUS_INITIATED = 0;
public static final int STATUS_ACCEPTED = 1;
public static final int STATUS_TERMINATED = 2;
public static final int STATUS_CANCELED = 3;
public static final int STATUS_FINISHED = 4;
public static final int STATUS_TRANSMITTING = 5;
public static final int STATUS_FAILED = 99;
private int status = -1;
private Message message;
private String sessionId;
private Account account;
private String initiator;
private String responder;
private List<JingleCandidate> candidates = new ArrayList<JingleCandidate>();
private HashMap<String, SocksConnection> connections = new HashMap<String, SocksConnection>();
private String transportId;
private Element fileOffer;
private JingleFile file = null;
private boolean receivedCandidate = false;
private boolean sentCandidate = false;
private JingleTransport transport = null;
private OnIqPacketReceived responseListener = new OnIqPacketReceived() {
@Override
public void onIqPacketReceived(Account account, IqPacket packet) {
if (packet.getType() == IqPacket.TYPE_ERROR) {
mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
status = STATUS_FAILED;
}
}
};
final OnFileTransmitted onFileTransmitted = new OnFileTransmitted() {
@Override
public void onFileTransmitted(JingleFile file) {
if (responder.equals(account.getFullJid())) {
sendSuccess();
mXmppConnectionService.markMessage(message, Message.STATUS_RECIEVED);
}
Log.d("xmppService","sucessfully transmitted file. sha1:"+file.getSha1Sum());
}
};
private OnProxyActivated onProxyActivated = new OnProxyActivated() {
@Override
public void success() {
if (initiator.equals(account.getFullJid())) {
Log.d("xmppService","we were initiating. sending file");
transport.send(file,onFileTransmitted);
} else {
transport.receive(file,onFileTransmitted);
Log.d("xmppService","we were responding. receiving file");
}
}
@Override
public void failed() {
Log.d("xmppService","proxy activation failed");
}
};
public JingleConnection(JingleConnectionManager mJingleConnectionManager) {
this.mJingleConnectionManager = mJingleConnectionManager;
this.mXmppConnectionService = mJingleConnectionManager.getXmppConnectionService();
}
public String getSessionId() {
return this.sessionId;
}
public String getAccountJid() {
return this.account.getFullJid();
}
public String getCounterPart() {
return this.message.getCounterpart();
}
public void deliverPacket(JinglePacket packet) {
if (packet.isAction("session-terminate")) {
Reason reason = packet.getReason();
if (reason!=null) {
if (reason.hasChild("cancel")) {
this.cancel();
} else if (reason.hasChild("success")) {
this.finish();
}
} else {
Log.d("xmppService","remote terminated for no reason");
this.cancel();
}
} else if (packet.isAction("session-accept")) {
accept(packet);
} else if (packet.isAction("transport-info")) {
transportInfo(packet);
} else {
Log.d("xmppService","packet arrived in connection. action was "+packet.getAction());
}
}
public void init(Message message) {
this.message = message;
this.account = message.getConversation().getAccount();
this.initiator = this.account.getFullJid();
this.responder = this.message.getCounterpart();
this.sessionId = this.mJingleConnectionManager.nextRandomId();
if (this.candidates.size() > 0) {
this.sendInitRequest();
} else {
this.mJingleConnectionManager.getPrimaryCandidate(account, new OnPrimaryCandidateFound() {
@Override
public void onPrimaryCandidateFound(boolean success, final JingleCandidate candidate) {
if (success) {
final SocksConnection socksConnection = new SocksConnection(JingleConnection.this, candidate);
connections.put(candidate.getCid(), socksConnection);
socksConnection.connect(new OnSocksConnection() {
@Override
public void failed() {
Log.d("xmppService","connection to our own primary candidete failed");
sendInitRequest();
}
@Override
public void established() {
Log.d("xmppService","succesfully connected to our own primary candidate");
mergeCandidate(candidate);
sendInitRequest();
}
});
mergeCandidate(candidate);
} else {
Log.d("xmppService","no primary candidate of our own was found");
sendInitRequest();
}
}
});
}
}
public void init(Account account, JinglePacket packet) {
this.status = STATUS_INITIATED;
Conversation conversation = this.mXmppConnectionService.findOrCreateConversation(account, packet.getFrom().split("/")[0], false);
this.message = new Message(conversation, "receiving image file", Message.ENCRYPTION_NONE);
this.message.setType(Message.TYPE_IMAGE);
this.message.setStatus(Message.STATUS_RECIEVING);
String[] fromParts = packet.getFrom().split("/");
this.message.setPresence(fromParts[1]);
this.account = account;
this.initiator = packet.getFrom();
this.responder = this.account.getFullJid();
this.sessionId = packet.getSessionId();
Content content = packet.getJingleContent();
this.transportId = content.getTransportId();
this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
this.fileOffer = packet.getJingleContent().getFileOffer();
if (fileOffer!=null) {
this.file = this.mXmppConnectionService.getFileBackend().getJingleFile(message);
Element fileSize = fileOffer.findChild("size");
Element fileName = fileOffer.findChild("name");
this.file.setExpectedSize(Long.parseLong(fileSize.getContent()));
conversation.getMessages().add(message);
this.mXmppConnectionService.databaseBackend.createMessage(message);
if (this.mXmppConnectionService.convChangedListener!=null) {
this.mXmppConnectionService.convChangedListener.onConversationListChanged();
}
if (this.file.getExpectedSize()<=this.mJingleConnectionManager.getAutoAcceptFileSize()) {
Log.d("xmppService","auto accepting file from "+packet.getFrom());
this.sendAccept();
} else {
Log.d("xmppService","not auto accepting new file offer with size: "+this.file.getExpectedSize()+" allowed size:"+this.mJingleConnectionManager.getAutoAcceptFileSize());
}
} else {
Log.d("xmppService","no file offer was attached. aborting");
}
}
private void sendInitRequest() {
JinglePacket packet = this.bootstrapPacket("session-initiate");
Content content = new Content();
if (message.getType() == Message.TYPE_IMAGE) {
content.setAttribute("creator", "initiator");
content.setAttribute("name", "a-file-offer");
content.setTransportId(this.transportId);
this.file = this.mXmppConnectionService.getFileBackend().getJingleFile(message);
content.setFileOffer(this.file);
this.transportId = this.mJingleConnectionManager.nextRandomId();
content.setTransportId(this.transportId);
content.socks5transport().setChildren(getCandidatesAsElements());
packet.setContent(content);
this.sendJinglePacket(packet);
this.status = STATUS_INITIATED;
}
}
private List<Element> getCandidatesAsElements() {
List<Element> elements = new ArrayList<Element>();
for(JingleCandidate c : this.candidates) {
elements.add(c.toElement());
}
return elements;
}
private void sendAccept() {
status = STATUS_ACCEPTED;
connectNextCandidate();
this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
@Override
public void onPrimaryCandidateFound(boolean success,final JingleCandidate candidate) {
final JinglePacket packet = bootstrapPacket("session-accept");
final Content content = new Content();
content.setFileOffer(fileOffer);
content.setTransportId(transportId);
if ((success)&&(!equalCandidateExists(candidate))) {
final SocksConnection socksConnection = new SocksConnection(JingleConnection.this, candidate);
connections.put(candidate.getCid(), socksConnection);
socksConnection.connect(new OnSocksConnection() {
@Override
public void failed() {
Log.d("xmppService","connection to our own primary candidate failed");
content.socks5transport().setChildren(getCandidatesAsElements());
packet.setContent(content);
sendJinglePacket(packet);
}
@Override
public void established() {
Log.d("xmppService","connected to primary candidate");
mergeCandidate(candidate);
content.socks5transport().setChildren(getCandidatesAsElements());
packet.setContent(content);
sendJinglePacket(packet);
}
});
} else {
Log.d("xmppService","did not find a primary candidate for ourself");
content.socks5transport().setChildren(getCandidatesAsElements());
packet.setContent(content);
sendJinglePacket(packet);
}
}
});
}
private JinglePacket bootstrapPacket(String action) {
JinglePacket packet = new JinglePacket();
packet.setAction(action);
packet.setFrom(account.getFullJid());
packet.setTo(this.message.getCounterpart());
packet.setSessionId(this.sessionId);
packet.setInitiator(this.initiator);
return packet;
}
private void sendJinglePacket(JinglePacket packet) {
//Log.d("xmppService",packet.toString());
account.getXmppConnection().sendIqPacket(packet,responseListener);
}
private void accept(JinglePacket packet) {
Content content = packet.getJingleContent();
mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
this.status = STATUS_ACCEPTED;
this.connectNextCandidate();
IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT);
account.getXmppConnection().sendIqPacket(response, null);
}
private void transportInfo(JinglePacket packet) {
Content content = packet.getJingleContent();
if (content.hasSocks5Transport()) {
if (content.socks5transport().hasChild("activated")) {
onProxyActivated.success();
} else if (content.socks5transport().hasChild("activated")) {
onProxyActivated.failed();
} else if (content.socks5transport().hasChild("candidate-error")) {
Log.d("xmppService","received candidate error");
this.receivedCandidate = true;
if (status == STATUS_ACCEPTED) {
this.connect();
}
} else if (content.socks5transport().hasChild("candidate-used")){
String cid = content.socks5transport().findChild("candidate-used").getAttribute("cid");
if (cid!=null) {
Log.d("xmppService","candidate used by counterpart:"+cid);
JingleCandidate candidate = getCandidate(cid);
candidate.flagAsUsedByCounterpart();
this.receivedCandidate = true;
if ((status == STATUS_ACCEPTED)&&(this.sentCandidate)) {
this.connect();
} else {
Log.d("xmppService","ignoring because file is already in transmission or we havent sent our candidate yet");
}
} else {
Log.d("xmppService","couldn't read used candidate");
}
} else {
Log.d("xmppService","empty transport");
}
}
IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT);
account.getXmppConnection().sendIqPacket(response, null);
}
private void connect() {
final SocksConnection connection = chooseConnection();
this.transport = connection;
if (connection==null) {
Log.d("xmppService","could not find suitable candidate");
this.disconnect();
this.status = STATUS_FAILED;
this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_FAILED);
} else {
this.status = STATUS_TRANSMITTING;
if (connection.isProxy()) {
if (connection.getCandidate().isOurs()) {
Log.d("xmppService","candidate "+connection.getCandidate().getCid()+" was our proxy and needs activation");
IqPacket activation = new IqPacket(IqPacket.TYPE_SET);
activation.setTo(connection.getCandidate().getJid());
activation.query("http://jabber.org/protocol/bytestreams").setAttribute("sid", this.getSessionId());
activation.query().addChild("activate").setContent(this.getCounterPart());
this.account.getXmppConnection().sendIqPacket(activation, new OnIqPacketReceived() {
@Override
public void onIqPacketReceived(Account account, IqPacket packet) {
if (packet.getType()==IqPacket.TYPE_ERROR) {
onProxyActivated.failed();
} else {
onProxyActivated.success();
sendProxyActivated(connection.getCandidate().getCid());
}
}
});
}
} else {
if (initiator.equals(account.getFullJid())) {
Log.d("xmppService","we were initiating. sending file");
connection.send(file,onFileTransmitted);
} else {
Log.d("xmppService","we were responding. receiving file");
connection.receive(file,onFileTransmitted);
}
}
}
}
private SocksConnection chooseConnection() {
SocksConnection connection = null;
Iterator<Entry<String, SocksConnection>> it = this.connections.entrySet().iterator();
while (it.hasNext()) {
Entry<String, SocksConnection> pairs = it.next();
SocksConnection currentConnection = pairs.getValue();
//Log.d("xmppService","comparing candidate: "+currentConnection.getCandidate().toString());
if (currentConnection.isEstablished()&&(currentConnection.getCandidate().isUsedByCounterpart()||(!currentConnection.getCandidate().isOurs()))) {
//Log.d("xmppService","is usable");
if (connection==null) {
connection = currentConnection;
} else {
if (connection.getCandidate().getPriority()<currentConnection.getCandidate().getPriority()) {
connection = currentConnection;
} else if (connection.getCandidate().getPriority()==currentConnection.getCandidate().getPriority()) {
//Log.d("xmppService","found two candidates with same priority");
if (initiator.equals(account.getFullJid())) {
if (currentConnection.getCandidate().isOurs()) {
connection = currentConnection;
}
} else {
if (!currentConnection.getCandidate().isOurs()) {
connection = currentConnection;
}
}
}
}
}
it.remove();
}
return connection;
}
private void sendSuccess() {
JinglePacket packet = bootstrapPacket("session-terminate");
Reason reason = new Reason();
reason.addChild("success");
packet.setReason(reason);
this.sendJinglePacket(packet);
this.disconnect();
this.status = STATUS_FINISHED;
this.mXmppConnectionService.markMessage(this.message, Message.STATUS_RECIEVED);
}
private void finish() {
this.status = STATUS_FINISHED;
this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND);
this.disconnect();
}
public void cancel() {
this.disconnect();
this.status = STATUS_CANCELED;
this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_REJECTED);
}
private void connectNextCandidate() {
for(JingleCandidate candidate : this.candidates) {
if ((!connections.containsKey(candidate.getCid())&&(!candidate.isOurs()))) {
this.connectWithCandidate(candidate);
return;
}
}
this.sendCandidateError();
}
private void connectWithCandidate(final JingleCandidate candidate) {
final SocksConnection socksConnection = new SocksConnection(this,candidate);
connections.put(candidate.getCid(), socksConnection);
socksConnection.connect(new OnSocksConnection() {
@Override
public void failed() {
Log.d("xmppService", "connection failed with "+candidate.getHost()+":"+candidate.getPort());
connectNextCandidate();
}
@Override
public void established() {
Log.d("xmppService", "established connection with "+candidate.getHost()+":"+candidate.getPort());
sendCandidateUsed(candidate.getCid());
}
});
}
private void disconnect() {
Iterator<Entry<String, SocksConnection>> it = this.connections.entrySet().iterator();
while (it.hasNext()) {
Entry<String, SocksConnection> pairs = it.next();
pairs.getValue().disconnect();
it.remove();
}
}
private void sendProxyActivated(String cid) {
JinglePacket packet = bootstrapPacket("transport-info");
Content content = new Content();
//TODO: put these into actual variables
content.setAttribute("creator", "initiator");
content.setAttribute("name", "a-file-offer");
content.setTransportId(this.transportId);
content.socks5transport().addChild("activated").setAttribute("cid", cid);
packet.setContent(content);
this.sendJinglePacket(packet);
}
private void sendCandidateUsed(final String cid) {
JinglePacket packet = bootstrapPacket("transport-info");
Content content = new Content();
//TODO: put these into actual variables
content.setAttribute("creator", "initiator");
content.setAttribute("name", "a-file-offer");
content.setTransportId(this.transportId);
content.setUsedCandidate(cid);
packet.setContent(content);
this.sendJinglePacket(packet);
this.sentCandidate = true;
if ((receivedCandidate)&&(status == STATUS_ACCEPTED)) {
connect();
}
}
private void sendCandidateError() {
JinglePacket packet = bootstrapPacket("transport-info");
Content content = new Content();
//TODO: put these into actual variables
content.setAttribute("creator", "initiator");
content.setAttribute("name", "a-file-offer");
content.setTransportId(this.transportId);
content.setCandidateError();
packet.setContent(content);
this.sendJinglePacket(packet);
this.sentCandidate = true;
if ((receivedCandidate)&&(status == STATUS_ACCEPTED)) {
connect();
}
}
public String getInitiator() {
return this.initiator;
}
public String getResponder() {
return this.responder;
}
public int getStatus() {
return this.status;
}
private boolean equalCandidateExists(JingleCandidate candidate) {
for(JingleCandidate c : this.candidates) {
if (c.equalValues(candidate)) {
return true;
}
}
return false;
}
private void mergeCandidate(JingleCandidate candidate) {
for(JingleCandidate c : this.candidates) {
if (c.equals(candidate)) {
return;
}
}
this.candidates.add(candidate);
}
private void mergeCandidates(List<JingleCandidate> candidates) {
for(JingleCandidate c : candidates) {
mergeCandidate(c);
}
}
private JingleCandidate getCandidate(String cid) {
for(JingleCandidate c : this.candidates) {
if (c.getCid().equals(cid)) {
return c;
}
}
return null;
}
interface OnProxyActivated {
public void success();
public void failed();
}
}