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proxy: make it the caller's reponsibility to close the socket

Browse source 
This makes the code shorter as there is now a single place where the
socket should be closed.
This commit is contained in:
Florian Schmaus 2019-11-18 17:44:08 +01:00
parent 9d626bf787
commit 7afd1fdf46
4 changed files with 123 additions and 151 deletions
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12
smack-core/src/main/java/org/jivesoftware/smack/proxy/ProxySocketConnection.java
View file

@ -1,6 +1,6 @@
/**
*
* Copyright 2015-2016 Florian Schmaus.
* Copyright 2015-2019 Florian Schmaus.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -21,6 +21,16 @@ import java.net.Socket;
public interface ProxySocketConnection {
/**
* Initiate a connection to the given host on the given port. Note that the caller is responsible for closing the
* socket in case this method throws.
*
* @param socket the socket to use to initiate the connection to the proxy.
* @param host the host to connect to.
* @param port the port to connect to.
* @param timeout the timeout in milliseconds.
* @throws IOException in case an I/O error occurs.
*/
void connect(Socket socket, String host, int port, int timeout)
throws IOException;

94
smack-core/src/main/java/org/jivesoftware/smack/proxy/Socks4ProxySocketConnection.java
View file

@ -39,20 +39,17 @@ public class Socks4ProxySocketConnection implements ProxySocketConnection {
@Override
public void connect(Socket socket, String host, int port, int timeout)
throws IOException {
InputStream in = null;
OutputStream out = null;
String proxy_host = proxy.getProxyAddress();
int proxy_port = proxy.getProxyPort();
String user = proxy.getProxyUsername();
try {
socket.connect(new InetSocketAddress(proxy_host, proxy_port), timeout);
in = socket.getInputStream();
out = socket.getOutputStream();
socket.setTcpNoDelay(true);
socket.connect(new InetSocketAddress(proxy_host, proxy_port), timeout);
InputStream in = socket.getInputStream();
OutputStream out = socket.getOutputStream();
socket.setTcpNoDelay(true);
byte[] buf = new byte[1024];
int index = 0;
byte[] buf = new byte[1024];
int index = 0;
/*
1) CONNECT
@ -72,25 +69,25 @@ public class Socks4ProxySocketConnection implements ProxySocketConnection {
of all zero bits.
*/
buf[index++] = 4;
buf[index++] = 1;
buf[index++] = 4;
buf[index++] = 1;
buf[index++] = (byte) (port >>> 8);
buf[index++] = (byte) (port & 0xff);
buf[index++] = (byte) (port >>> 8);
buf[index++] = (byte) (port & 0xff);
InetAddress inetAddress = InetAddress.getByName(proxy_host);
byte[] byteAddress = inetAddress.getAddress();
for (int i = 0; i < byteAddress.length; i++) {
buf[index++] = byteAddress[i];
}
InetAddress inetAddress = InetAddress.getByName(proxy_host);
byte[] byteAddress = inetAddress.getAddress();
for (int i = 0; i < byteAddress.length; i++) {
buf[index++] = byteAddress[i];
}
if (user != null) {
byte[] userBytes = user.getBytes(StandardCharsets.UTF_8);
System.arraycopy(userBytes, 0, buf, index, user.length());
index += user.length();
}
buf[index++] = 0;
out.write(buf, 0, index);
if (user != null) {
byte[] userBytes = user.getBytes(StandardCharsets.UTF_8);
System.arraycopy(userBytes, 0, buf, index, user.length());
index += user.length();
}
buf[index++] = 0;
out.write(buf, 0, index);
/*
The SOCKS server checks to see whether such a request should be granted
@ -119,43 +116,26 @@ public class Socks4ProxySocketConnection implements ProxySocketConnection {
The remaining fields are ignored.
*/
int len = 6;
int s = 0;
while (s < len) {
int i = in.read(buf, s, len - s);
if (i <= 0) {
throw new ProxyException(ProxyInfo.ProxyType.SOCKS4,
"stream is closed");
}
s += i;
}
if (buf[0] != 0) {
int len = 6;
int s = 0;
while (s < len) {
int i = in.read(buf, s, len - s);
if (i <= 0) {
throw new ProxyException(ProxyInfo.ProxyType.SOCKS4,
"server returns VN " + buf[0]);
"stream is closed");
}
if (buf[1] != 90) {
try {
socket.close();
}
catch (Exception eee) {
}
String message = "ProxySOCKS4: server returns CD " + buf[1];
throw new ProxyException(ProxyInfo.ProxyType.SOCKS4, message);
}
byte[] temp = new byte[2];
in.read(temp, 0, 2);
s += i;
}
catch (RuntimeException e) {
throw e;
if (buf[0] != 0) {
throw new ProxyException(ProxyInfo.ProxyType.SOCKS4,
"server returns VN " + buf[0]);
}
catch (Exception e) {
try {
socket.close();
}
catch (Exception eee) {
}
throw new ProxyException(ProxyInfo.ProxyType.SOCKS4, e.toString());
if (buf[1] != 90) {
String message = "ProxySOCKS4: server returns CD " + buf[1];
throw new ProxyException(ProxyInfo.ProxyType.SOCKS4, message);
}
byte[] temp = new byte[2];
in.read(temp, 0, 2);
}
}

167
smack-core/src/main/java/org/jivesoftware/smack/proxy/Socks5ProxySocketConnection.java
View file

@ -22,9 +22,6 @@ import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.logging.Logger;
import org.jivesoftware.smack.util.CloseableUtil;
/**
* Socket factory for Socks5 proxy.
@ -32,7 +29,6 @@ import org.jivesoftware.smack.util.CloseableUtil;
* @author Atul Aggarwal
*/
public class Socks5ProxySocketConnection implements ProxySocketConnection {
private static final Logger LOGGER = Logger.getLogger(Socks5ProxySocketConnection.class.getName());
private final ProxyInfo proxy;
@ -43,22 +39,19 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
@Override
public void connect(Socket socket, String host, int port, int timeout)
throws IOException {
InputStream in = null;
OutputStream out = null;
String proxy_host = proxy.getProxyAddress();
int proxy_port = proxy.getProxyPort();
String user = proxy.getProxyUsername();
String passwd = proxy.getProxyPassword();
try {
socket.connect(new InetSocketAddress(proxy_host, proxy_port), timeout);
in = socket.getInputStream();
out = socket.getOutputStream();
socket.connect(new InetSocketAddress(proxy_host, proxy_port), timeout);
InputStream in = socket.getInputStream();
OutputStream out = socket.getOutputStream();
socket.setTcpNoDelay(true);
socket.setTcpNoDelay(true);
byte[] buf = new byte[1024];
int index = 0;
byte[] buf = new byte[1024];
int index = 0;
/*
+----+----------+----------+
@ -81,13 +74,13 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
o X'FF' NO ACCEPTABLE METHODS
*/
buf[index++] = 5;
buf[index++] = 5;
buf[index++] = 2;
buf[index++] = 0; // NO AUTHENTICATION REQUIRED
buf[index++] = 2; // USERNAME/PASSWORD
buf[index++] = 2;
buf[index++] = 0; // NO AUTHENTICATION REQUIRED
buf[index++] = 2; // USERNAME/PASSWORD
out.write(buf, 0, index);
out.write(buf, 0, index);
/*
The server selects from one of the methods given in METHODS, and
@ -99,17 +92,17 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
| 1 | 1 |
+----+--------+
*/
fill(in, buf, 2);
fill(in, buf, 2);
boolean check = false;
switch (buf[1] & 0xff) {
case 0: // NO AUTHENTICATION REQUIRED
check = true;
boolean check = false;
switch (buf[1] & 0xff) {
case 0: // NO AUTHENTICATION REQUIRED
check = true;
break;
case 2: // USERNAME/PASSWORD
if (user == null || passwd == null) {
break;
case 2: // USERNAME/PASSWORD
if (user == null || passwd == null) {
break;
}
}
/*
Once the SOCKS V5 server has started, and the client has selected the
@ -130,20 +123,19 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
PASSWD field that follows. The PASSWD field contains the password
association with the given UNAME.
*/
index = 0;
buf[index++] = 1;
buf[index++] = (byte) user.length();
byte[] userBytes = user.getBytes(StandardCharsets.UTF_8);
System.arraycopy(userBytes, 0, buf, index,
user.length());
index += user.length();
byte[] passwordBytes = passwd.getBytes(StandardCharsets.UTF_8);
buf[index++] = (byte) passwordBytes.length;
System.arraycopy(passwordBytes, 0, buf, index,
passwd.length());
index += passwd.length();
out.write(buf, 0, index);
index = 0;
buf[index++] = 1;
buf[index++] = (byte) user.length();
byte[] userBytes = user.getBytes(StandardCharsets.UTF_8);
System.arraycopy(userBytes, 0, buf, index,
user.length());
index += user.length();
byte[] passwordBytes = passwd.getBytes(StandardCharsets.UTF_8);
buf[index++] = (byte) passwordBytes.length;
System.arraycopy(passwordBytes, 0, buf, index,
passwd.length());
index += passwd.length();
out.write(buf, 0, index);
/*
The server verifies the supplied UNAME and PASSWD, and sends the
@ -159,19 +151,18 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
`failure' (STATUS value other than X'00') status, it MUST close the
connection.
*/
fill(in, buf, 2);
if (buf[1] == 0) {
check = true;
}
break;
default:
}
fill(in, buf, 2);
if (buf[1] == 0) {
check = true;
}
break;
default:
}
if (!check) {
CloseableUtil.maybeClose(socket, LOGGER);
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,
"fail in SOCKS5 proxy");
}
if (!check) {
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,
"fail in SOCKS5 proxy");
}
/*
The SOCKS request is formed as follows:
@ -199,21 +190,21 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
order
*/
index = 0;
buf[index++] = 5;
buf[index++] = 1; // CONNECT
buf[index++] = 0;
index = 0;
buf[index++] = 5;
buf[index++] = 1; // CONNECT
buf[index++] = 0;
byte[] hostb = host.getBytes(StandardCharsets.UTF_8);
int len = hostb.length;
buf[index++] = 3; // DOMAINNAME
buf[index++] = (byte) len;
System.arraycopy(hostb, 0, buf, index, len);
index += len;
buf[index++] = (byte) (port >>> 8);
buf[index++] = (byte) (port & 0xff);
byte[] hostb = host.getBytes(StandardCharsets.UTF_8);
int len = hostb.length;
buf[index++] = 3; // DOMAINNAME
buf[index++] = (byte) len;
System.arraycopy(hostb, 0, buf, index, len);
index += len;
buf[index++] = (byte) (port >>> 8);
buf[index++] = (byte) (port & 0xff);
out.write(buf, 0, index);
out.write(buf, 0, index);
/*
The SOCKS request information is sent by the client as soon as it has
@ -250,35 +241,25 @@ public class Socks5ProxySocketConnection implements ProxySocketConnection {
o BND.PORT server bound port in network octet order
*/
fill(in, buf, 4);
fill(in, buf, 4);
if (buf[1] != 0) {
CloseableUtil.maybeClose(socket, LOGGER);
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,
"server returns " + buf[1]);
}
if (buf[1] != 0) {
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,
"server returns " + buf[1]);
}
switch (buf[3] & 0xff) {
case 1:
fill(in, buf, 6);
break;
case 3:
fill(in, buf, 1);
fill(in, buf, (buf[0] & 0xff) + 2);
break;
case 4:
fill(in, buf, 18);
break;
default:
}
}
catch (RuntimeException e) {
throw e;
}
catch (Exception e) {
CloseableUtil.maybeClose(socket, LOGGER);
// TODO convert to IOException(e) when minimum Android API level is 9 or higher
throw new IOException(e.getLocalizedMessage());
switch (buf[3] & 0xff) {
case 1:
fill(in, buf, 6);
break;
case 3:
fill(in, buf, 1);
fill(in, buf, (buf[0] & 0xff) + 2);
break;
case 4:
fill(in, buf, 18);
break;
default:
}
}

1
smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
View file

@ -606,6 +606,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
try {
proxyInfo.getProxySocketConnection().connect(socket, host, port, timeout);
} catch (IOException e) {
CloseableUtil.maybeClose(socket, LOGGER);
hostAddress.setException(e);
failedAddresses.add(hostAddress);
continue;