1 package net.pterodactylus.irc.connection;
3 import static com.google.common.base.Optional.absent;
4 import static com.google.common.base.Optional.fromNullable;
5 import static com.google.common.base.Optional.of;
6 import static java.lang.String.format;
7 import static java.net.InetAddress.getByName;
8 import static org.apache.log4j.Logger.getLogger;
10 import java.net.InetAddress;
11 import java.net.UnknownHostException;
12 import java.util.List;
14 import net.pterodactylus.irc.Connection;
15 import net.pterodactylus.irc.Reply;
16 import net.pterodactylus.irc.Source;
17 import net.pterodactylus.irc.event.DccAcceptReceived;
18 import net.pterodactylus.irc.event.DccSendReceived;
20 import com.google.common.base.Optional;
21 import com.google.common.eventbus.EventBus;
22 import com.google.common.primitives.Ints;
23 import com.google.common.primitives.Longs;
24 import org.apache.log4j.Logger;
27 * Handles all CTCP messages relevant to DCC transfers.
29 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
31 public class CtcpHandler implements Handler {
33 private static final Logger logger = getLogger(CtcpHandler.class);
34 private final EventBus eventBus;
35 private final Connection connection;
37 public CtcpHandler(EventBus eventBus, Connection connection) {
38 this.eventBus = eventBus;
39 this.connection = connection;
43 public boolean willHandle(Reply reply) {
44 return (commandIs(reply, "PRIVMSG") || commandIs(reply, "NOTICE"))
45 && messageIsCtcp(reply.parameters().get(1));
48 private boolean commandIs(Reply reply, String command) {
49 return reply.command().equalsIgnoreCase(command);
52 private boolean messageIsCtcp(String message) {
53 return message.startsWith("\u0001") && message.endsWith("\u0001");
57 public void handleReply(Reply reply) {
58 List<String> parameters = reply.parameters();
59 String message = parameters.get(1);
60 Source source = reply.source().get();
61 handleCtcp(source, message);
64 private void handleCtcp(Source client, String message) {
65 String[] messageWords = message.substring(1, message.length() - 1).split(" +");
66 String ctcpCommand = messageWords[0];
67 if (ctcpCommand.equalsIgnoreCase("DCC")) {
68 if (messageWords[1].equalsIgnoreCase("SEND")) {
69 Optional<InetAddress> inetAddress = parseInetAddress(messageWords[3]);
70 Optional<Integer> port = fromNullable(Ints.tryParse(messageWords[4]));
71 long fileSize = fromNullable(Longs.tryParse(messageWords[5])).or(-1L);
72 if (inetAddress.isPresent() && port.isPresent()) {
73 eventBus.post(new DccSendReceived(connection, client, messageWords[2], inetAddress.get(), port.get(), fileSize));
75 logger.warn(format("Received malformed DCC SEND: “%s”", message));
77 } else if (messageWords[1].equalsIgnoreCase("ACCEPT")) {
78 Optional<Integer> port = fromNullable(Ints.tryParse(messageWords[3]));
79 long position = (messageWords.length > 4) ? fromNullable(Longs.tryParse(messageWords[4])).or(-1L) : -1;
80 if (port.isPresent()) {
81 eventBus.post(new DccAcceptReceived(connection, client, messageWords[2], port.get(), position));
83 logger.warn(format("Received malformed DCC ACCEPT: “%s”", message));
89 private Optional<InetAddress> parseInetAddress(String ip) {
90 Long ipNumber = Longs.tryParse(ip);
91 if (ipNumber == null) {
95 StringBuilder hostname = new StringBuilder(15);
96 hostname.append((ipNumber >>> 24) & 0xff).append('.');
97 hostname.append((ipNumber >>> 16) & 0xff).append('.');
98 hostname.append((ipNumber >>> 8) & 0xff).append('.');
99 hostname.append(ipNumber & 0xff);
101 return of(getByName(hostname.toString()));
102 } catch (UnknownHostException uhe1) {