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* I2PTunnelIRCClient:

Browse Source 
- Big refactoring into multiple class files
    - Allow AWAY and CAP messages
    - First cut at DCC support - not for SOCKS (yet)
This commit is contained in:
zzz
2011-07-14 20:06:31 +00:00
parent 252f1047e5
commit 79ac955b33
11 changed files with 1124 additions and 380 deletions
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3
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelClientBase.java
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@@ -193,6 +193,9 @@ public abstract class I2PTunnelClientBase extends I2PTunnelTask implements Runna
// no need to load the netDb with leaseSets for destinations that will never // no need to load the netDb with leaseSets for destinations that will never
// be looked up // be looked up
boolean dccEnabled = (this instanceof I2PTunnelIRCClient) &&
Boolean.valueOf(tunnel.getClientOptions().getProperty(I2PTunnelIRCClient.PROP_DCC)).booleanValue();
if (!dccEnabled)
tunnel.getClientOptions().setProperty("i2cp.dontPublishLeaseSet", "true"); tunnel.getClientOptions().setProperty("i2cp.dontPublishLeaseSet", "true");
boolean openNow = !Boolean.valueOf(tunnel.getClientOptions().getProperty("i2cp.delayOpen")).booleanValue(); boolean openNow = !Boolean.valueOf(tunnel.getClientOptions().getProperty("i2cp.delayOpen")).booleanValue();

437
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelIRCClient.java
View File

@@ -10,7 +10,13 @@ import java.util.List;
import java.util.StringTokenizer; import java.util.StringTokenizer;
import net.i2p.client.streaming.I2PSocket; import net.i2p.client.streaming.I2PSocket;
import net.i2p.data.Base32;
import net.i2p.data.Destination; import net.i2p.data.Destination;
import net.i2p.i2ptunnel.irc.DCCClientManager;
import net.i2p.i2ptunnel.irc.DCCHelper;
import net.i2p.i2ptunnel.irc.I2PTunnelDCCServer;
import net.i2p.i2ptunnel.irc.IrcInboundFilter;
import net.i2p.i2ptunnel.irc.IrcOutboundFilter;
import net.i2p.util.EventDispatcher; import net.i2p.util.EventDispatcher;
import net.i2p.util.I2PAppThread; import net.i2p.util.I2PAppThread;
import net.i2p.util.Log; import net.i2p.util.Log;
@@ -18,7 +24,7 @@ import net.i2p.util.Log;
/** /**
* Todo: Can we extend I2PTunnelClient instead and remove some duplicated code? * Todo: Can we extend I2PTunnelClient instead and remove some duplicated code?
*/ */
public class I2PTunnelIRCClient extends I2PTunnelClientBase implements Runnable { public class I2PTunnelIRCClient extends I2PTunnelClientBase implements DCCHelper {
/** used to assign unique IDs to the threads / clients. no logic or functionality */ /** used to assign unique IDs to the threads / clients. no logic or functionality */
private static volatile long __clientId = 0; private static volatile long __clientId = 0;
@@ -27,6 +33,14 @@ public class I2PTunnelIRCClient extends I2PTunnelClientBase implements Runnable
protected List<Destination> dests; protected List<Destination> dests;
private static final long DEFAULT_READ_TIMEOUT = 5*60*1000; // -1 private static final long DEFAULT_READ_TIMEOUT = 5*60*1000; // -1
protected long readTimeout = DEFAULT_READ_TIMEOUT; protected long readTimeout = DEFAULT_READ_TIMEOUT;
private final boolean _dccEnabled;
private I2PTunnelDCCServer _DCCServer;
private DCCClientManager _DCCClientManager;
/**
* @since 0.8.9
*/
public static final String PROP_DCC = "i2ptunnel.ircclient.enableDCC";
/** /**
* @throws IllegalArgumentException if the I2PTunnel does not contain * @throws IllegalArgumentException if the I2PTunnel does not contain
@@ -75,6 +89,9 @@ public class I2PTunnelIRCClient extends I2PTunnelClientBase implements Runnable
setName("IRC Client on " + tunnel.listenHost + ':' + localPort); setName("IRC Client on " + tunnel.listenHost + ':' + localPort);
_dccEnabled = Boolean.valueOf(tunnel.getClientOptions().getProperty(PROP_DCC)).booleanValue();
// TODO add some prudent tunnel options (or is it too late?)
startRunning(); startRunning();
notifyEvent("openIRCClientResult", "ok"); notifyEvent("openIRCClientResult", "ok");
@@ -89,9 +106,9 @@ public class I2PTunnelIRCClient extends I2PTunnelClientBase implements Runnable
i2ps = createI2PSocket(clientDest); i2ps = createI2PSocket(clientDest);
i2ps.setReadTimeout(readTimeout); i2ps.setReadTimeout(readTimeout);
StringBuffer expectedPong = new StringBuffer(); StringBuffer expectedPong = new StringBuffer();
Thread in = new I2PAppThread(new IrcInboundFilter(s,i2ps, expectedPong, _log), "IRC Client " + __clientId + " in", true); Thread in = new I2PAppThread(new IrcInboundFilter(s,i2ps, expectedPong, _log, this), "IRC Client " + __clientId + " in", true);
in.start(); in.start();
Thread out = new I2PAppThread(new IrcOutboundFilter(s,i2ps, expectedPong, _log), "IRC Client " + __clientId + " out", true); Thread out = new I2PAppThread(new IrcOutboundFilter(s,i2ps, expectedPong, _log, this), "IRC Client " + __clientId + " out", true);
out.start(); out.start();
} catch (Exception ex) { } catch (Exception ex) {
if (_log.shouldLog(Log.ERROR)) if (_log.shouldLog(Log.ERROR))
@@ -120,388 +137,62 @@ public class I2PTunnelIRCClient extends I2PTunnelClientBase implements Runnable
return dests.get(index); return dests.get(index);
} }
/************************************************************************* @Override
* public boolean close(boolean forced) {
*/ synchronized(this) {
public static class IrcInboundFilter implements Runnable { if (_DCCServer != null) {
_DCCServer.close(forced);
private final Socket local; _DCCServer = null;
private final I2PSocket remote; }
private final StringBuffer expectedPong; }
private final Log _log; return super.close(forced);
public IrcInboundFilter(Socket _local, I2PSocket _remote, StringBuffer pong, Log log) {
local=_local;
remote=_remote;
expectedPong=pong;
_log = log;
} }
public void run() {
// Todo: Don't use BufferedReader - IRC spec limits line length to 512 but...
BufferedReader in;
OutputStream output;
try {
in = new BufferedReader(new InputStreamReader(remote.getInputStream(), "ISO-8859-1"));
output=local.getOutputStream();
} catch (IOException e) {
if (_log.shouldLog(Log.ERROR))
_log.error("IrcInboundFilter: no streams",e);
return;
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("IrcInboundFilter: Running.");
try {
while(true)
{
try {
String inmsg = in.readLine();
if(inmsg==null)
break;
if(inmsg.endsWith("\r"))
inmsg=inmsg.substring(0,inmsg.length()-1);
if (_log.shouldLog(Log.DEBUG))
_log.debug("in: [" + inmsg + "]");
String outmsg = inboundFilter(inmsg, expectedPong);
if(outmsg!=null)
{
if(!inmsg.equals(outmsg)) {
if (_log.shouldLog(Log.WARN)) {
_log.warn("inbound FILTERED: "+outmsg);
_log.warn(" - inbound was: "+inmsg);
}
} else {
if (_log.shouldLog(Log.INFO))
_log.info("inbound: "+outmsg);
}
outmsg=outmsg+"\r\n"; // rfc1459 sec. 2.3
output.write(outmsg.getBytes("ISO-8859-1"));
// probably doesn't do much but can't hurt
output.flush();
} else {
if (_log.shouldLog(Log.WARN))
_log.warn("inbound BLOCKED: "+inmsg);
}
} catch (IOException e1) {
if (_log.shouldLog(Log.WARN))
_log.warn("IrcInboundFilter: disconnected",e1);
break;
}
}
} catch (RuntimeException re) {
_log.error("Error filtering inbound data", re);
} finally {
try { local.close(); } catch (IOException e) {}
}
if(_log.shouldLog(Log.DEBUG))
_log.debug("IrcInboundFilter: Done.");
}
}
/*************************************************************************
*
*/
public static class IrcOutboundFilter implements Runnable {
private final Socket local;
private final I2PSocket remote;
private final StringBuffer expectedPong;
private final Log _log;
public IrcOutboundFilter(Socket _local, I2PSocket _remote, StringBuffer pong, Log log) {
local=_local;
remote=_remote;
expectedPong=pong;
_log = log;
}
public void run() {
// Todo: Don't use BufferedReader - IRC spec limits line length to 512 but...
BufferedReader in;
OutputStream output;
try {
in = new BufferedReader(new InputStreamReader(local.getInputStream(), "ISO-8859-1"));
output=remote.getOutputStream();
} catch (IOException e) {
if (_log.shouldLog(Log.ERROR))
_log.error("IrcOutboundFilter: no streams",e);
return;
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("IrcOutboundFilter: Running.");
try {
while(true)
{
try {
String inmsg = in.readLine();
if(inmsg==null)
break;
if(inmsg.endsWith("\r"))
inmsg=inmsg.substring(0,inmsg.length()-1);
if (_log.shouldLog(Log.DEBUG))
_log.debug("out: [" + inmsg + "]");
String outmsg = outboundFilter(inmsg, expectedPong);
if(outmsg!=null)
{
if(!inmsg.equals(outmsg)) {
if (_log.shouldLog(Log.WARN)) {
_log.warn("outbound FILTERED: "+outmsg);
_log.warn(" - outbound was: "+inmsg);
}
} else {
if (_log.shouldLog(Log.INFO))
_log.info("outbound: "+outmsg);
}
outmsg=outmsg+"\r\n"; // rfc1459 sec. 2.3
output.write(outmsg.getBytes("ISO-8859-1"));
// save 250 ms in streaming
output.flush();
} else {
if (_log.shouldLog(Log.WARN))
_log.warn("outbound BLOCKED: "+"\""+inmsg+"\"");
}
} catch (IOException e1) {
if (_log.shouldLog(Log.WARN))
_log.warn("IrcOutboundFilter: disconnected",e1);
break;
}
}
} catch (RuntimeException re) {
_log.error("Error filtering outbound data", re);
} finally {
try { remote.close(); } catch (IOException e) {}
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("IrcOutboundFilter: Done.");
}
}
/*************************************************************************
*
*/
public static String inboundFilter(String s, StringBuffer expectedPong) {
String field[]=s.split(" ",4);
String command;
int idx=0;
final String[] allowedCommands =
{
// "NOTICE", // can contain CTCP
//"PING",
//"PONG",
"MODE",
"JOIN",
"NICK",
"QUIT",
"PART",
"WALLOPS",
"ERROR",
"KICK",
"H", // "hide operator status" (after kicking an op)
"TOPIC"
};
if(field[0].charAt(0)==':')
idx++;
try { command = field[idx++]; }
catch (IndexOutOfBoundsException ioobe) // wtf, server sent borked command?
{
//_log.warn("Dropping defective message: index out of bounds while extracting command.");
return null;
}
idx++; //skip victim
// Allow numerical responses
try {
new Integer(command);
return s;
} catch(NumberFormatException nfe){}
if ("PING".equalsIgnoreCase(command))
return "PING 127.0.0.1"; // no way to know what the ircd to i2ptunnel server con is, so localhost works
if ("PONG".equalsIgnoreCase(command)) {
// Turn the received ":irc.freshcoffee.i2p PONG irc.freshcoffee.i2p :127.0.0.1"
// into ":127.0.0.1 PONG 127.0.0.1 " so that the caller can append the client's extra parameter
// though, does 127.0.0.1 work for irc clients connecting remotely? and for all of them? sure would
// be great if irc clients actually followed the RFCs here, but i guess thats too much to ask.
// If we haven't PINGed them, or the PING we sent isn't something we know how to filter, this
// is blank.
// //
// String pong = expectedPong.length() > 0 ? expectedPong.toString() : null; // Start of the DCCHelper interface
// If we aren't going to rewrite it, pass it through
String pong = expectedPong.length() > 0 ? expectedPong.toString() : s;
expectedPong.setLength(0);
return pong;
}
// Allow all allowedCommands
for(int i=0;i<allowedCommands.length;i++) {
if(allowedCommands[i].equalsIgnoreCase(command))
return s;
}
// Allow PRIVMSG, but block CTCP.
if("PRIVMSG".equalsIgnoreCase(command) || "NOTICE".equalsIgnoreCase(command))
{
String msg;
msg = field[idx++];
if(msg.indexOf(0x01) >= 0) // CTCP marker ^A can be anywhere, not just immediately after the ':'
{
// CTCP
msg=msg.substring(2);
if(msg.startsWith("ACTION ")) {
// /me says hello
return s;
}
return null; // Block all other ctcp
}
return s;
}
// Block the rest
return null;
}
public static String outboundFilter(String s, StringBuffer expectedPong) {
String field[]=s.split(" ",3);
String command;
final String[] allowedCommands =
{
// "NOTICE", // can contain CTCP
"MODE",
"JOIN",
"NICK",
"WHO",
"WHOIS",
"LIST",
"NAMES",
"NICK",
// "QUIT", // replace with a filtered QUIT to hide client quit messages
"SILENCE",
"MAP", // seems safe enough, the ircd should protect themselves though
// "PART", // replace with filtered PART to hide client part messages
"OPER",
// "PONG", // replaced with a filtered PING/PONG since some clients send the server IP (thanks aardvax!)
// "PING",
"KICK",
"HELPME",
"RULES",
"TOPIC",
"ISON", // jIRCii uses this for a ping (response is 303)
"INVITE"
};
if(field[0].length()==0)
return null; // W T F?
if(field[0].charAt(0)==':')
return null; // wtf
command = field[0].toUpperCase();
if ("PING".equals(command)) {
// Most clients just send a PING and are happy with any old PONG. Others,
// like BitchX, actually expect certain behavior. It sends two different pings:
// "PING :irc.freshcoffee.i2p" and "PING 1234567890 127.0.0.1" (where the IP is the proxy)
// the PONG to the former seems to be "PONG 127.0.0.1", while the PONG to the later is
// ":irc.freshcoffee.i2p PONG irc.freshcoffe.i2p :1234567890".
// We don't want to send them our proxy's IP address, so we need to rewrite the PING
// sent to the server, but when we get a PONG back, use what we expected, rather than
// what they sent.
// //
// Yuck.
String rv = null; public boolean isEnabled() {
expectedPong.setLength(0); return _dccEnabled;
if (field.length == 1) { // PING
rv = "PING";
// If we aren't rewriting the PING don't rewrite the PONG
// expectedPong.append("PONG 127.0.0.1");
} else if (field.length == 2) { // PING nonce
rv = "PING " + field[1];
// If we aren't rewriting the PING don't rewrite the PONG
// expectedPong.append("PONG ").append(field[1]);
} else if (field.length == 3) { // PING nonce serverLocation
rv = "PING " + field[1];
expectedPong.append("PONG ").append(field[2]).append(" :").append(field[1]); // PONG serverLocation nonce
} else {
//if (_log.shouldLog(Log.ERROR))
// _log.error("IRC client sent a PING we don't understand, filtering it (\"" + s + "\")");
rv = null;
} }
//if (_log.shouldLog(Log.WARN)) public String getB32Hostname() {
// _log.warn("sending ping [" + rv + "], waiting for [" + expectedPong + "] orig was [" + s + "]"); return Base32.encode(sockMgr.getSession().getMyDestination().calculateHash().getData()) + ".b32.i2p";
}
public int newOutgoing(byte[] ip, int port, String type) {
I2PTunnelDCCServer server;
synchronized(this) {
if (_DCCServer == null) {
if (_log.shouldLog(Log.INFO))
_log.info("Starting DCC Server");
_DCCServer = new I2PTunnelDCCServer(sockMgr, l, this, getTunnel());
// TODO add some prudent tunnel options (or is it too late?)
_DCCServer.startRunning();
}
server = _DCCServer;
}
int rv = server.newOutgoing(ip, port, type);
if (_log.shouldLog(Log.INFO))
_log.info("New outgoing " + type + ' ' + port + " returns " + rv);
return rv; return rv;
} }
if ("PONG".equals(command))
return "PONG 127.0.0.1"; // no way to know what the ircd to i2ptunnel server con is, so localhost works
// Allow all allowedCommands public int newIncoming(String b32, int port, String type) {
for(int i=0;i<allowedCommands.length;i++) DCCClientManager tracker;
{ synchronized(this) {
if(allowedCommands[i].equals(command)) if (_DCCClientManager == null) {
return s; if (_log.shouldLog(Log.INFO))
_log.info("Starting DCC Client");
_DCCClientManager = new DCCClientManager(sockMgr, l, this, getTunnel());
} }
tracker = _DCCClientManager;
// mIRC sends "NOTICE user :DCC Send file (IP)"
// in addition to the CTCP version
if("NOTICE".equals(command))
{
String msg = field[2];
if(msg.startsWith(":DCC "))
return null;
// fall through
} }
// The tracker starts our client
// Allow PRIVMSG, but block CTCP (except ACTION). int rv = tracker.newIncoming(b32, port, type);
if("PRIVMSG".equals(command) || "NOTICE".equals(command)) if (_log.shouldLog(Log.INFO))
{ _log.info("New incoming " + type + ' ' + b32 + ' ' + port + " returns " + rv);
String msg; return rv;
msg = field[2];
if(msg.indexOf(0x01) >= 0) // CTCP marker ^A can be anywhere, not just immediately after the ':'
{
// CTCP
msg=msg.substring(2);
if(msg.startsWith("ACTION ")) {
// /me says hello
return s;
}
return null; // Block all other ctcp
}
return s;
}
if("USER".equals(command)) {
int idx = field[2].lastIndexOf(":");
if(idx<0)
return "USER user hostname localhost :realname";
String realname = field[2].substring(idx+1);
String ret = "USER "+field[1]+" hostname localhost :"+realname;
return ret;
}
if ("PART".equals(command)) {
// hide client message
return "PART " + field[1] + " :leaving";
}
if ("QUIT".equals(command)) {
return "QUIT :leaving";
}
// Block the rest
return null;
} }
} }

29
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelServer.java
View File

@@ -47,7 +47,7 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
protected int remotePort; protected int remotePort;
private boolean _usePool; private boolean _usePool;
private Logging l; protected Logging l;
private static final long DEFAULT_READ_TIMEOUT = -1; // 3*60*1000; private static final long DEFAULT_READ_TIMEOUT = -1; // 3*60*1000;
/** default timeout to 3 minutes - override if desired */ /** default timeout to 3 minutes - override if desired */
@@ -69,10 +69,13 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
protected boolean bidir = false; protected boolean bidir = false;
private ThreadPoolExecutor _executor; private ThreadPoolExecutor _executor;
/** unused? port should always be specified */
private int DEFAULT_LOCALPORT = 4488; private int DEFAULT_LOCALPORT = 4488;
protected int localPort = DEFAULT_LOCALPORT; protected int localPort = DEFAULT_LOCALPORT;
/** /**
* @param privData Base64-encoded private key data,
* format is specified in {@link net.i2p.data.PrivateKeyFile PrivateKeyFile}
* @throws IllegalArgumentException if the I2CP configuration is b0rked so * @throws IllegalArgumentException if the I2CP configuration is b0rked so
* badly that we cant create a socketManager * badly that we cant create a socketManager
*/ */
@@ -84,6 +87,9 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
} }
/** /**
* @param privkey file containing the private key data,
* format is specified in {@link net.i2p.data.PrivateKeyFile PrivateKeyFile}
* @param privkeyname the name of the privKey file, not clear why we need this too
* @throws IllegalArgumentException if the I2CP configuration is b0rked so * @throws IllegalArgumentException if the I2CP configuration is b0rked so
* badly that we cant create a socketManager * badly that we cant create a socketManager
*/ */
@@ -105,6 +111,9 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
} }
/** /**
* @param privData stream containing the private key data,
* format is specified in {@link net.i2p.data.PrivateKeyFile PrivateKeyFile}
* @param privkeyname the name of the privKey file, not clear why we need this too
* @throws IllegalArgumentException if the I2CP configuration is b0rked so * @throws IllegalArgumentException if the I2CP configuration is b0rked so
* badly that we cant create a socketManager * badly that we cant create a socketManager
*/ */
@@ -114,10 +123,28 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
init(host, port, privData, privkeyname, l); init(host, port, privData, privkeyname, l);
} }
/**
* @param sktMgr the existing socket manager
* @since 0.8.9
*/
public I2PTunnelServer(InetAddress host, int port, I2PSocketManager sktMgr,
Logging l, EventDispatcher notifyThis, I2PTunnel tunnel) {
super("Server at " + host + ':' + port, notifyThis, tunnel);
this.l = l;
this.remoteHost = host;
this.remotePort = port;
_log = tunnel.getContext().logManager().getLog(getClass());
sockMgr = sktMgr;
open = true;
}
private static final int RETRY_DELAY = 20*1000; private static final int RETRY_DELAY = 20*1000;
private static final int MAX_RETRIES = 4; private static final int MAX_RETRIES = 4;
/** /**
* @param privData stream containing the private key data,
* format is specified in {@link net.i2p.data.PrivateKeyFile PrivateKeyFile}
* @param privkeyname the name of the privKey file, not clear why we need this too
* @throws IllegalArgumentException if the I2CP configuration is b0rked so * @throws IllegalArgumentException if the I2CP configuration is b0rked so
* badly that we cant create a socketManager * badly that we cant create a socketManager
*/ */

105
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/DCCClientManager.java Normal file
View File

@@ -0,0 +1,105 @@
package net.i2p.i2ptunnel.irc;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import net.i2p.client.streaming.I2PSocketManager;
import net.i2p.i2ptunnel.I2PTunnel;
import net.i2p.i2ptunnel.Logging;
import net.i2p.util.EventDispatcher;
import net.i2p.util.Log;
/**
* Start, track, and expire the I2PTunnelDCCClients.
*
* <pre>
*
* <--- I2PTunnelDCCServer <--------------- I2PTunnelDCCClient <----
* originating responding
* chat client chat client
* ---> I2PTunnelIRCClient --> IRC server --> I2TunnelIRCClient ----->
*
* </pre>
*
* @since 0.8.9
*/
public class DCCClientManager {
private final I2PSocketManager sockMgr;
private final EventDispatcher _dispatch;
private final Logging l;
private final I2PTunnel _tunnel;
private final Log _log;
private final ConcurrentHashMap<Integer, I2PAddress> _incoming;
// list of client tunnels?
private static long _id;
private static final int MAX_INCOMING_PENDING = 10;
private static final int MAX_INCOMING_ACTIVE = 10;
private static final long INBOUND_EXPIRE = 30*60*1000;
public DCCClientManager(I2PSocketManager sktMgr, Logging logging,
EventDispatcher dispatch, I2PTunnel tunnel) {
sockMgr = sktMgr;
l = logging;
_dispatch = dispatch;
_tunnel = tunnel;
_log = tunnel.getContext().logManager().getLog(DCCClientManager.class);
_incoming = new ConcurrentHashMap(8);
}
/**
* An incoming DCC request
*
* @param b32 remote dcc server address
* @param port remote dcc server port
* @param type ignored
* @return local server port or -1 on error
*/
public int newIncoming(String b32, int port, String type) {
expireInbound();
if (_incoming.size() >= MAX_INCOMING_PENDING) {
_log.error("Too many incoming DCC, max is " + MAX_INCOMING_PENDING);
return -1;
}
I2PAddress client = new I2PAddress(b32, port, _tunnel.getContext().clock().now() + INBOUND_EXPIRE);
try {
// Transparent tunnel used for all types...
// Do we need to do any filtering for chat?
I2PTunnelDCCClient cTunnel = new I2PTunnelDCCClient(b32, port, l, sockMgr,
_dispatch, _tunnel, ++_id);
int lport = cTunnel.getLocalPort();
if (_log.shouldLog(Log.WARN))
_log.warn("Opened client tunnel at port " + lport +
" pointing to " + b32 + ':' + port);
_incoming.put(Integer.valueOf(lport), client);
return lport;
} catch (IllegalArgumentException uhe) {
l.log("Could not find listen host to bind to [" + _tunnel.host + "]");
_log.error("Error finding host to bind", uhe);
return -1;
}
}
private void expireInbound() {
for (Iterator<I2PAddress> iter = _incoming.values().iterator(); iter.hasNext(); ) {
I2PAddress a = iter.next();
if (a.expire < _tunnel.getContext().clock().now())
iter.remove();
}
}
private static class I2PAddress {
public final String dest;
public final int port;
public final long expire;
public I2PAddress(String b32, int p, long exp) {
dest = b32;
port = p;
expire = exp;
}
}
}

37
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/DCCHelper.java Normal file
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package net.i2p.i2ptunnel.irc;
/**
* Hooks to create and maintain DCC client and server tunnels
*
* @since 0.8.9
*/
public interface DCCHelper {
public boolean isEnabled();
/**
* String to put in the outgoing DCC
*/
public String getB32Hostname();
/**
* An outgoing DCC request
*
* @param ip local irc client IP
* @param port local irc client port
* @param type string
* @return i2p port or -1 on error
*/
public int newOutgoing(byte[] ip, int port, String type);
/**
* An incoming DCC request
*
* @param b32 remote dcc server address
* @param port remote dcc server port
* @param type string
* @return local server port or -1 on error
*/
public int newIncoming(String b32, int port, String type);
}

77
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/I2PTunnelDCCClient.java Normal file
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/* I2PTunnel is GPL'ed (with the exception mentioned in I2PTunnel.java)
* (c) 2003 - 2004 mihi
*/
package net.i2p.i2ptunnel.irc;
import java.net.Socket;
import java.io.IOException;
import net.i2p.client.streaming.I2PSocket;
import net.i2p.client.streaming.I2PSocketManager;
import net.i2p.client.streaming.I2PSocketOptions;
import net.i2p.data.Destination;
import net.i2p.i2ptunnel.I2PTunnel;
import net.i2p.i2ptunnel.I2PTunnelClientBase;
import net.i2p.i2ptunnel.I2PTunnelRunner;
import net.i2p.i2ptunnel.Logging;
import net.i2p.util.EventDispatcher;
import net.i2p.util.Log;
/**
* A standard client, using an existing socket manager.
* Targets a single destination and port.
* Naming resolution is delayed until connect time.
*
* @since 0.8.9
*/
public class I2PTunnelDCCClient extends I2PTunnelClientBase {
// delay resolution until connect time
private final String _dest;
private final int _remotePort;
/**
* @param dest the target, presumably b32
* @throws IllegalArgumentException if the I2PTunnel does not contain
* valid config to contact the router
*/
public I2PTunnelDCCClient(String dest, int remotePort, Logging l,
I2PSocketManager sktMgr, EventDispatcher notifyThis,
I2PTunnel tunnel, long clientId) throws IllegalArgumentException {
super(0, l, sktMgr, tunnel, notifyThis, clientId);
_dest = dest;
_remotePort = remotePort;
setName("DCC send -> " + dest + ':' + remotePort);
startRunning();
notifyEvent("openClientResult", "ok");
}
protected void clientConnectionRun(Socket s) {
I2PSocket i2ps = null;
if (_log.shouldLog(Log.INFO))
_log.info("Opening DCC connection to " + _dest + ':' + _remotePort);
Destination dest = _context.namingService().lookup(_dest);
if (dest == null) {
_log.error("Could not find leaseset for DCC connection to " + _dest + ':' + _remotePort);
closeSocket(s);
// shutdown?
return;
}
I2PSocketOptions opts = sockMgr.buildOptions();
opts.setPort(_remotePort);
try {
i2ps = createI2PSocket(dest, opts);
new I2PTunnelRunner(s, i2ps, sockLock, null, mySockets);
} catch (Exception ex) {
_log.error("Could not make DCC connection to " + _dest + ':' + _remotePort, ex);
closeSocket(s);
if (i2ps != null) {
try { i2ps.close(); } catch (IOException ioe) {}
}
}
}
}

173
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/I2PTunnelDCCServer.java Normal file
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package net.i2p.i2ptunnel.irc;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import net.i2p.client.streaming.I2PSocket;
import net.i2p.client.streaming.I2PSocketManager;
import net.i2p.i2ptunnel.I2PTunnel;
import net.i2p.i2ptunnel.I2PTunnelRunner;
import net.i2p.i2ptunnel.I2PTunnelServer;
import net.i2p.i2ptunnel.Logging;
import net.i2p.util.EventDispatcher;
import net.i2p.util.Log;
/**
* A standard server that only answers for registered ports,
* and each port can only be used once.
*
* <pre>
*
* <--- I2PTunnelDCCServer <--------------- I2PTunnelDCCClient <----
* originating responding
* chat client chat client
* ---> I2PTunnelIRCClient --> IRC server --> I2TunnelIRCClient ----->
*
* </pre>
*
* @since 0.8.9
*/
public class I2PTunnelDCCServer extends I2PTunnelServer {
private final ConcurrentHashMap<Integer, LocalAddress> _outgoing;
// list of client tunnels?
private static long _id;
/** just to keep super() happy */
private static final InetAddress DUMMY;
static {
InetAddress dummy = null;
try {
dummy = InetAddress.getByAddress(new byte[4]);
} catch (UnknownHostException uhe) {}
DUMMY = dummy;
}
private static final int MIN_I2P_PORT = 1;
private static final int MAX_I2P_PORT = 65535;
private static final int MAX_OUTGOING_PENDING = 20;
private static final int MAX_OUTGOING_ACTIVE = 20;
private static final long OUTBOUND_EXPIRE = 30*60*1000;
/**
* There's no support for unsolicited incoming I2P connections,
* so there's no server host or port parameters.
*
* @param sktMgr an existing socket manager
* @throws IllegalArgumentException if the I2PTunnel does not contain
* valid config to contact the router
*/
public I2PTunnelDCCServer(I2PSocketManager sktMgr, Logging l,
EventDispatcher notifyThis, I2PTunnel tunnel) {
super(DUMMY, 0, sktMgr, l, notifyThis, tunnel);
_outgoing = new ConcurrentHashMap(8);
}
/**
* An incoming DCC connection, only accept for a known port.
* Passed through without filtering.
*/
@Override
protected void blockingHandle(I2PSocket socket) {
if (_log.shouldLog(Log.INFO))
_log.info("Incoming connection to '" + toString() + "' from: " + socket.getPeerDestination().calculateHash().toBase64());
try {
expireOutbound();
int myPort = socket.getLocalPort();
// TODO remove, add to active
LocalAddress local = _outgoing.get(Integer.valueOf(myPort));
if (local == null) {
if (_log.shouldLog(Log.WARN))
_log.warn("Incoming DCC connection for unknown port " + myPort);
try {
socket.close();
} catch (IOException ioe) {}
return;
}
if (_log.shouldLog(Log.WARN))
_log.warn("Incoming DCC connection for I2P port " + myPort +
" sending to " + local.ia + ':' + local.port);
Socket s = new Socket(local.ia, local.port);
new I2PTunnelRunner(s, socket, slock, null, null);
} catch (SocketException ex) {
try {
socket.close();
} catch (IOException ioe) {}
if (_log.shouldLog(Log.ERROR))
_log.error("Error connecting to server " + remoteHost + ':' + remotePort, ex);
} catch (IOException ex) {
_log.error("Error while waiting for I2PConnections", ex);
}
}
/**
* An outgoing DCC request
*
* @param ip local irc client IP
* @param port local irc client port
* @param type ignored
* @return i2p port or -1 on error
*/
public int newOutgoing(byte[] ip, int port, String type) {
expireOutbound();
if (_outgoing.size() >= MAX_OUTGOING_PENDING) {
_log.error("Too many outgoing DCC, max is " + MAX_OUTGOING_PENDING);
return -1;
}
InetAddress ia;
try {
ia = InetAddress.getByAddress(ip);
} catch (UnknownHostException uhe) {
return -1;
}
LocalAddress client = new LocalAddress(ia, port, getTunnel().getContext().clock().now() + OUTBOUND_EXPIRE);
for (int i = 0; i < 10; i++) {
int iport = MIN_I2P_PORT + getTunnel().getContext().random().nextInt(1 + MAX_I2P_PORT - MIN_I2P_PORT);
LocalAddress old = _outgoing.putIfAbsent(Integer.valueOf(iport), client);
if (old != null)
continue;
// TODO expire in a few minutes
return iport;
}
// couldn't find an unused i2p port
return -1;
}
private InetAddress getListenHost(Logging l) {
try {
return InetAddress.getByName(getTunnel().listenHost);
} catch (UnknownHostException uhe) {
l.log("Could not find listen host to bind to [" + getTunnel().host + "]");
_log.error("Error finding host to bind", uhe);
notifyEvent("openBaseClientResult", "error");
return null;
}
}
private void expireOutbound() {
for (Iterator<LocalAddress> iter = _outgoing.values().iterator(); iter.hasNext(); ) {
LocalAddress a = iter.next();
if (a.expire < getTunnel().getContext().clock().now())
iter.remove();
}
}
private static class LocalAddress {
public final InetAddress ia;
public final int port;
public final long expire;
public LocalAddress(InetAddress a, int p, long exp) {
ia = a;
port = p;
expire = exp;
}
}
}

428
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/IRCFilter.java Normal file
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package net.i2p.i2ptunnel.irc;
import net.i2p.data.DataHelper;
/**
* Static methods to filter individual lines.
* Moved from I2PTunnelIRCClient.java
*
* @since 0.8.9
*/
abstract class IRCFilter {
private static final boolean ALLOW_ALL_DCC_IN = false;
private static final boolean ALLOW_ALL_DCC_OUT = false;
/** does not override DCC handling */
private static final boolean ALLOW_ALL_CTCP_IN = false;
/** does not override DCC handling */
private static final boolean ALLOW_ALL_CTCP_OUT = false;
/*************************************************************************
*
* Modify or filter a single inbound line.
*
* @param helper may be null
* @return the original or modified line, or null if it should be dropped.
*/
public static String inboundFilter(String s, StringBuffer expectedPong, DCCHelper helper) {
String field[]=s.split(" ",4);
String command;
int idx=0;
final String[] allowedCommands =
{
// "NOTICE", // can contain CTCP
//"PING",
//"PONG",
"MODE",
"JOIN",
"NICK",
"QUIT",
"PART",
"WALLOPS",
"ERROR",
"KICK",
"H", // "hide operator status" (after kicking an op)
"TOPIC",
// http://tools.ietf.org/html/draft-mitchell-irc-capabilities-01
"CAP"
};
if(field[0].charAt(0)==':')
idx++;
try { command = field[idx++]; }
catch (IndexOutOfBoundsException ioobe) // wtf, server sent borked command?
{
//_log.warn("Dropping defective message: index out of bounds while extracting command.");
return null;
}
idx++; //skip victim
// Allow numerical responses
try {
new Integer(command);
return s;
} catch(NumberFormatException nfe){}
if ("PING".equalsIgnoreCase(command))
return "PING 127.0.0.1"; // no way to know what the ircd to i2ptunnel server con is, so localhost works
if ("PONG".equalsIgnoreCase(command)) {
// Turn the received ":irc.freshcoffee.i2p PONG irc.freshcoffee.i2p :127.0.0.1"
// into ":127.0.0.1 PONG 127.0.0.1 " so that the caller can append the client's extra parameter
// though, does 127.0.0.1 work for irc clients connecting remotely? and for all of them? sure would
// be great if irc clients actually followed the RFCs here, but i guess thats too much to ask.
// If we haven't PINGed them, or the PING we sent isn't something we know how to filter, this
// is blank.
//
// String pong = expectedPong.length() > 0 ? expectedPong.toString() : null;
// If we aren't going to rewrite it, pass it through
String pong = expectedPong.length() > 0 ? expectedPong.toString() : s;
expectedPong.setLength(0);
return pong;
}
// Allow all allowedCommands
for(int i=0;i<allowedCommands.length;i++) {
if(allowedCommands[i].equalsIgnoreCase(command))
return s;
}
// Allow PRIVMSG, but block CTCP.
if("PRIVMSG".equalsIgnoreCase(command) || "NOTICE".equalsIgnoreCase(command))
{
String msg;
msg = field[idx++];
if(msg.indexOf(0x01) >= 0) // CTCP marker ^A can be anywhere, not just immediately after the ':'
{
// CTCP
// don't even try to parse multiple CTCP in the same message
int count = 0;
for (int i = 0; i < msg.length(); i++) {
if (msg.charAt(i) == 0x01)
count++;
}
if (count != 2)
return null;
msg=msg.substring(2);
if(msg.startsWith("ACTION ")) {
// /me says hello
return s;
}
if (msg.startsWith("DCC ")) {
StringBuilder buf = new StringBuilder(128);
for (int i = 0; i <= idx - 2; i++) {
buf.append(field[i]).append(' ');
}
buf.append(":\001DCC ");
return filterDCCIn(buf.toString(), msg.substring(4), helper);
}
if (ALLOW_ALL_CTCP_IN)
return s;
return null; // Block all other ctcp
}
return s;
}
// Block the rest
return null;
}
/*************************************************************************
*
* Modify or filter a single outbound line.
*
* @param helper may be null
* @return the original or modified line, or null if it should be dropped.
*/
public static String outboundFilter(String s, StringBuffer expectedPong, DCCHelper helper) {
String field[]=s.split(" ",3);
String command;
final String[] allowedCommands =
{
// "NOTICE", // can contain CTCP
"MODE",
"JOIN",
"NICK",
"WHO",
"WHOIS",
"LIST",
"NAMES",
"NICK",
// "QUIT", // replace with a filtered QUIT to hide client quit messages
"SILENCE",
"MAP", // seems safe enough, the ircd should protect themselves though
// "PART", // replace with filtered PART to hide client part messages
"OPER",
// "PONG", // replaced with a filtered PING/PONG since some clients send the server IP (thanks aardvax!)
// "PING",
"KICK",
"HELPME",
"RULES",
"TOPIC",
"ISON", // jIRCii uses this for a ping (response is 303)
"INVITE",
"AWAY", // should be harmless
// http://tools.ietf.org/html/draft-mitchell-irc-capabilities-01
"CAP"
};
if(field[0].length()==0)
return null; // W T F?
if(field[0].charAt(0)==':')
return null; // wtf
command = field[0].toUpperCase();
if ("PING".equals(command)) {
// Most clients just send a PING and are happy with any old PONG. Others,
// like BitchX, actually expect certain behavior. It sends two different pings:
// "PING :irc.freshcoffee.i2p" and "PING 1234567890 127.0.0.1" (where the IP is the proxy)
// the PONG to the former seems to be "PONG 127.0.0.1", while the PONG to the later is
// ":irc.freshcoffee.i2p PONG irc.freshcoffe.i2p :1234567890".
// We don't want to send them our proxy's IP address, so we need to rewrite the PING
// sent to the server, but when we get a PONG back, use what we expected, rather than
// what they sent.
//
// Yuck.
String rv = null;
expectedPong.setLength(0);
if (field.length == 1) { // PING
rv = "PING";
// If we aren't rewriting the PING don't rewrite the PONG
// expectedPong.append("PONG 127.0.0.1");
} else if (field.length == 2) { // PING nonce
rv = "PING " + field[1];
// If we aren't rewriting the PING don't rewrite the PONG
// expectedPong.append("PONG ").append(field[1]);
} else if (field.length == 3) { // PING nonce serverLocation
rv = "PING " + field[1];
expectedPong.append("PONG ").append(field[2]).append(" :").append(field[1]); // PONG serverLocation nonce
} else {
//if (_log.shouldLog(Log.ERROR))
// _log.error("IRC client sent a PING we don't understand, filtering it (\"" + s + "\")");
rv = null;
}
//if (_log.shouldLog(Log.WARN))
// _log.warn("sending ping [" + rv + "], waiting for [" + expectedPong + "] orig was [" + s + "]");
return rv;
}
if ("PONG".equals(command))
return "PONG 127.0.0.1"; // no way to know what the ircd to i2ptunnel server con is, so localhost works
// Allow all allowedCommands
for(int i=0;i<allowedCommands.length;i++)
{
if(allowedCommands[i].equals(command))
return s;
}
// mIRC sends "NOTICE user :DCC Send file (IP)"
// in addition to the CTCP version
if("NOTICE".equals(command))
{
String msg = field[2];
if(msg.startsWith(":DCC "))
return filterDCCOut(field[0] + ' ' + field[1] + " :DCC ", msg.substring(5), helper);
// fall through
}
// Allow PRIVMSG, but block CTCP (except ACTION).
if("PRIVMSG".equals(command) || "NOTICE".equals(command))
{
String msg;
msg = field[2];
if(msg.indexOf(0x01) >= 0) // CTCP marker ^A can be anywhere, not just immediately after the ':'
{
// CTCP
// don't even try to parse multiple CTCP in the same message
int count = 0;
for (int i = 0; i < msg.length(); i++) {
if (msg.charAt(i) == 0x01)
count++;
}
if (count != 2)
return null;
msg=msg.substring(2);
if(msg.startsWith("ACTION ")) {
// /me says hello
return s;
}
if (msg.startsWith("DCC "))
return filterDCCOut(field[0] + ' ' + field[1] + " :\001DCC ", msg.substring(4), helper);
if (ALLOW_ALL_CTCP_OUT)
return s;
return null; // Block all other ctcp
}
return s;
}
if("USER".equals(command)) {
int idx = field[2].lastIndexOf(":");
if(idx<0)
return "USER user hostname localhost :realname";
String realname = field[2].substring(idx+1);
String ret = "USER "+field[1]+" hostname localhost :"+realname;
return ret;
}
if ("PART".equals(command)) {
// hide client message
return "PART " + field[1] + " :leaving";
}
if ("QUIT".equals(command)) {
return "QUIT :leaving";
}
// Block the rest
return null;
}
/**
* @param pfx the message through the "DCC " part
* @param msg the message after the "DCC " part
* @param helper may be null
* @return the sanitized message or null to block
* @since 0.8.9
*/
private static String filterDCCIn(String pfx, String msg, DCCHelper helper) {
// strip trailing ctcp (other one is in pfx)
int ctcp = msg.indexOf(0x01);
if (ctcp > 0)
msg = msg.substring(0, ctcp);
String[] args = msg.split(" ", 5);
if (args.length <= 0)
return null;
String type = args[0];
// no IP in these but port needs to be fixed still
//if (type == "RESUME" || type == "ACCEPT")
// return msg;
if (!(type.equals("CHAT") || type.equals("SEND"))) {
if (ALLOW_ALL_DCC_IN) {
if (ctcp > 0)
return pfx + msg + (char) 0x01;
return pfx + msg;
}
return null;
}
if (helper == null || !helper.isEnabled())
return null;
if (args.length < 4)
return null;
String arg = args[1];
String b32 = args[2];
int cPort;
try {
String cp = args[3];
cPort = Integer.parseInt(cp);
} catch (NumberFormatException nfe) {
return null;
}
int port = helper.newIncoming(b32, cPort, type);
if (port < 0)
return null;
StringBuilder buf = new StringBuilder(256);
// fixme what is our address?
byte[] myIP = { 127, 0, 0, 1 };
buf.append(pfx)
.append(type).append(' ').append(arg).append(' ')
.append(DataHelper.fromLong(myIP, 0, myIP.length)).append(' ')
.append(port);
if (args.length > 4)
buf.append(' ').append(args[4]);
if (pfx.indexOf(0x01) >= 0)
buf.append((char) 0x01);
return buf.toString();
}
/**
* @param pfx the message through the "DCC " part
* @param msg the message after the "DCC " part
* @param helper may be null
* @return the sanitized message or null to block
* @since 0.8.9
*/
private static String filterDCCOut(String pfx, String msg, DCCHelper helper) {
// strip trailing ctcp (other one is in pfx)
int ctcp = msg.indexOf(0x01);
if (ctcp > 0)
msg = msg.substring(0, ctcp);
String[] args = msg.split(" ", 5);
if (args.length <= 0)
return null;
String type = args[0];
// no IP in these but port needs to be fixed still
//if (type == "RESUME" || type == "ACCEPT")
// return msg;
if (!(type.equals("CHAT") || type.equals("SEND"))) {
if (ALLOW_ALL_DCC_OUT) {
if (ctcp > 0)
return pfx + msg + (char) 0x01;
return pfx + msg;
}
}
if (helper == null || !helper.isEnabled())
return null;
if (args.length < 4)
return null;
String arg = args[1];
byte[] ip;
try {
String ips = args[2];
long ipl = Long.parseLong(ips);
if (ipl < 0x01000000) {
// "reverse/firewall DCC"
// http://en.wikipedia.org/wiki/Direct_Client-to-Client
// xchat sends an IP of 199 and a port of 0
System.err.println("Reverse / Firewall DCC not supported IP = 0x" + Long.toHexString(ipl));
return null;
}
ip = DataHelper.toLong(4, ipl);
} catch (NumberFormatException nfe) {
return null;
}
int cPort;
try {
String cp = args[3];
cPort = Integer.parseInt(cp);
} catch (NumberFormatException nfe) {
return null;
}
if (cPort <= 0) {
// "reverse/firewall DCC"
// http://en.wikipedia.org/wiki/Direct_Client-to-Client
System.err.println("Reverse / Firewall DCC not supported");
return null;
}
int port = helper.newOutgoing(ip, cPort, type);
if (port < 0)
return null;
StringBuilder buf = new StringBuilder(256);
buf.append(pfx)
.append(type).append(' ').append(arg).append(' ')
.append(helper.getB32Hostname()).append(' ')
.append(port);
if (args.length > 4)
buf.append(' ').append(args[4]);
if (pfx.indexOf(0x01) >= 0)
buf.append((char) 0x01);
return buf.toString();
}
}

101
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/IrcInboundFilter.java Normal file
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package net.i2p.i2ptunnel.irc;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import net.i2p.client.streaming.I2PSocket;
import net.i2p.util.Log;
/**
* Thread to do inbound filtering.
* Moved from I2PTunnelIRCClient.java
*
* @since 0.8.9
*/
public class IrcInboundFilter implements Runnable {
private final Socket local;
private final I2PSocket remote;
private final StringBuffer expectedPong;
private final Log _log;
private final DCCHelper _dccHelper;
public IrcInboundFilter(Socket lcl, I2PSocket rem, StringBuffer pong, Log log) {
this(lcl, rem, pong, log, null);
}
/**
* @param helper may be null
* @since 0.8.9
*/
public IrcInboundFilter(Socket lcl, I2PSocket rem, StringBuffer pong, Log log, DCCHelper helper) {
local = lcl;
remote = rem;
expectedPong = pong;
_log = log;
_dccHelper = helper;
}
public void run() {
// Todo: Don't use BufferedReader - IRC spec limits line length to 512 but...
BufferedReader in;
OutputStream output;
try {
in = new BufferedReader(new InputStreamReader(remote.getInputStream(), "ISO-8859-1"));
output=local.getOutputStream();
} catch (IOException e) {
if (_log.shouldLog(Log.ERROR))
_log.error("IrcInboundFilter: no streams",e);
return;
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("IrcInboundFilter: Running.");
try {
while(true)
{
try {
String inmsg = in.readLine();
if(inmsg==null)
break;
if(inmsg.endsWith("\r"))
inmsg=inmsg.substring(0,inmsg.length()-1);
if (_log.shouldLog(Log.DEBUG))
_log.debug("in: [" + inmsg + "]");
String outmsg = IRCFilter.inboundFilter(inmsg, expectedPong, _dccHelper);
if(outmsg!=null)
{
if(!inmsg.equals(outmsg)) {
if (_log.shouldLog(Log.WARN)) {
_log.warn("inbound FILTERED: "+outmsg);
_log.warn(" - inbound was: "+inmsg);
}
} else {
if (_log.shouldLog(Log.INFO))
_log.info("inbound: "+outmsg);
}
outmsg=outmsg+"\r\n"; // rfc1459 sec. 2.3
output.write(outmsg.getBytes("ISO-8859-1"));
// probably doesn't do much but can't hurt
output.flush();
} else {
if (_log.shouldLog(Log.WARN))
_log.warn("inbound BLOCKED: "+inmsg);
}
} catch (IOException e1) {
if (_log.shouldLog(Log.WARN))
_log.warn("IrcInboundFilter: disconnected",e1);
break;
}
}
} catch (RuntimeException re) {
_log.error("Error filtering inbound data", re);
} finally {
try { local.close(); } catch (IOException e) {}
}
if(_log.shouldLog(Log.DEBUG))
_log.debug("IrcInboundFilter: Done.");
}
}

101
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/irc/IrcOutboundFilter.java Normal file
View File

@@ -0,0 +1,101 @@
package net.i2p.i2ptunnel.irc;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import net.i2p.client.streaming.I2PSocket;
import net.i2p.util.Log;
/**
* Thread to do inbound filtering.
* Moved from I2PTunnelIRCClient.java
*
* @since 0.8.9
*/
public class IrcOutboundFilter implements Runnable {
private final Socket local;
private final I2PSocket remote;
private final StringBuffer expectedPong;
private final Log _log;
private final DCCHelper _dccHelper;
public IrcOutboundFilter(Socket lcl, I2PSocket rem, StringBuffer pong, Log log) {
this(lcl, rem, pong, log, null);
}
/**
* @param helper may be null
* @since 0.8.9
*/
public IrcOutboundFilter(Socket lcl, I2PSocket rem, StringBuffer pong, Log log, DCCHelper helper) {
local = lcl;
remote = rem;
expectedPong = pong;
_log = log;
_dccHelper = helper;
}
public void run() {
// Todo: Don't use BufferedReader - IRC spec limits line length to 512 but...
BufferedReader in;
OutputStream output;
try {
in = new BufferedReader(new InputStreamReader(local.getInputStream(), "ISO-8859-1"));
output=remote.getOutputStream();
} catch (IOException e) {
if (_log.shouldLog(Log.ERROR))
_log.error("IrcOutboundFilter: no streams",e);
return;
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("IrcOutboundFilter: Running.");
try {
while(true)
{
try {
String inmsg = in.readLine();
if(inmsg==null)
break;
if(inmsg.endsWith("\r"))
inmsg=inmsg.substring(0,inmsg.length()-1);
if (_log.shouldLog(Log.DEBUG))
_log.debug("out: [" + inmsg + "]");
String outmsg = IRCFilter.outboundFilter(inmsg, expectedPong, _dccHelper);
if(outmsg!=null)
{
if(!inmsg.equals(outmsg)) {
if (_log.shouldLog(Log.WARN)) {
_log.warn("outbound FILTERED: "+outmsg);
_log.warn(" - outbound was: "+inmsg);
}
} else {
if (_log.shouldLog(Log.INFO))
_log.info("outbound: "+outmsg);
}
outmsg=outmsg+"\r\n"; // rfc1459 sec. 2.3
output.write(outmsg.getBytes("ISO-8859-1"));
// save 250 ms in streaming
output.flush();
} else {
if (_log.shouldLog(Log.WARN))
_log.warn("outbound BLOCKED: "+"\""+inmsg+"\"");
}
} catch (IOException e1) {
if (_log.shouldLog(Log.WARN))
_log.warn("IrcOutboundFilter: disconnected",e1);
break;
}
}
} catch (RuntimeException re) {
_log.error("Error filtering outbound data", re);
} finally {
try { remote.close(); } catch (IOException e) {}
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("IrcOutboundFilter: Done.");
}
}

7
apps/i2ptunnel/java/src/net/i2p/i2ptunnel/socks/I2PSOCKSIRCTunnel.java
View File

@@ -11,7 +11,8 @@ import java.net.Socket;
import net.i2p.I2PAppContext; import net.i2p.I2PAppContext;
import net.i2p.client.streaming.I2PSocket; import net.i2p.client.streaming.I2PSocket;
import net.i2p.i2ptunnel.I2PTunnel; import net.i2p.i2ptunnel.I2PTunnel;
import net.i2p.i2ptunnel.I2PTunnelIRCClient; import net.i2p.i2ptunnel.irc.IrcInboundFilter;
import net.i2p.i2ptunnel.irc.IrcOutboundFilter;
import net.i2p.i2ptunnel.Logging; import net.i2p.i2ptunnel.Logging;
import net.i2p.util.EventDispatcher; import net.i2p.util.EventDispatcher;
import net.i2p.util.I2PAppThread; import net.i2p.util.I2PAppThread;
@@ -50,10 +51,10 @@ public class I2PSOCKSIRCTunnel extends I2PSOCKSTunnel {
Socket clientSock = serv.getClientSocket(); Socket clientSock = serv.getClientSocket();
I2PSocket destSock = serv.getDestinationI2PSocket(this); I2PSocket destSock = serv.getDestinationI2PSocket(this);
StringBuffer expectedPong = new StringBuffer(); StringBuffer expectedPong = new StringBuffer();
Thread in = new I2PAppThread(new I2PTunnelIRCClient.IrcInboundFilter(clientSock, destSock, expectedPong, _log), Thread in = new I2PAppThread(new IrcInboundFilter(clientSock, destSock, expectedPong, _log),
"SOCKS IRC Client " + (++__clientId) + " in", true); "SOCKS IRC Client " + (++__clientId) + " in", true);
in.start(); in.start();
Thread out = new I2PAppThread(new I2PTunnelIRCClient.IrcOutboundFilter(clientSock, destSock, expectedPong, _log), Thread out = new I2PAppThread(new IrcOutboundFilter(clientSock, destSock, expectedPong, _log),
"SOCKS IRC Client " + __clientId + " out", true); "SOCKS IRC Client " + __clientId + " out", true);
out.start(); out.start();
} catch (SOCKSException e) { } catch (SOCKSException e) {