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Code Issues Releases Wiki Activity

Blacklist certain protocols from returning successfully, currently HTTP, FTP, SSH, SMTP, and POP

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moparisthebest 2013-06-19 20:00:53 -04:00
parent 4c330662c8
commit 5fc9f70a7d
1 changed files with 59 additions and 7 deletions
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66
ServerChecker/src/main/java/org/moparscape/ServerChecker.java
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@ -20,19 +20,32 @@ package org.moparscape;
import org.moparscape.result.ResultDelegator;
import java.io.Closeable;
import java.io.*;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.*;
public class ServerChecker {
// rudimentary and quick bad protocol detection
// format: port, String[]{responseStartsWith, [stringToSendFirst(optional)]}
private static final Map<Integer, String[]> badProtocols = Collections.unmodifiableMap(new HashMap<Integer, String[]>() {{
// HTTP
put(80, new String[]{"HTTP", "HEAD / HTTP/1.0\r\nHost: %s\r\n\r\n"});
put(8080, get(80));
// SSH
put(22, new String[]{"SSH"});
// FTP
put(21, new String[]{"220"});
// SMTP
put(25, new String[]{"220", "HELP\r\n"});
// POP
put(110, new String[]{"+OK"});
}});
//private static final Map<String, String> ipToHostname = Collections.synchronizedMap(new HashMap<String, String>(1000));
private static final Map<String, StringBuilder> ipToHostname = new HashMap<String, StringBuilder>(1000);
@ -116,7 +129,7 @@ public class ServerChecker {
Socket s = null;
String resolvedIP = null;
try {
InetSocketAddress addy = new InetSocketAddress(hostName, port);
final InetSocketAddress addy = new InetSocketAddress(hostName, port);
if (addy.isUnresolved())
return false;
resolvedIP = addy.getAddress().getHostAddress();
@ -130,6 +143,33 @@ public class ServerChecker {
s = new Socket();
s.setSoTimeout(timeout);
s.connect(addy, timeout);
// ensure we are NOT talking to a server with a blacklisted protocol
final String[] badProtocolDetection = badProtocols.get(port);
if (badProtocolDetection != null) {
Writer out = null;
BufferedReader in = null;
try {
in = new BufferedReader(new InputStreamReader(s.getInputStream()));
if (badProtocolDetection.length > 1) {
out = new OutputStreamWriter(s.getOutputStream());
out.write(String.format(badProtocolDetection[1], hostName));
out.flush();
}
final String result = in.readLine();
//System.out.println("result: "+result);
if (result != null && result.startsWith(badProtocolDetection[0]))// unsupported protocols
return returnClose(false, resolvedIP, hostName, port, id, oldResolvedIP);
} catch (Throwable e) {
//e.printStackTrace();
// we do not want to return false here
} finally {
tryClose(out);
tryClose(in);
}
}
/*
DataOutputStream out = null;
DataInputStream in = null;
@ -147,7 +187,7 @@ public class ServerChecker {
}
*/
return returnClose(true, resolvedIP, hostName, port, id, oldResolvedIP);
} catch (Exception e) {
} catch (Throwable e) {
//e.printStackTrace();
return returnClose(false, resolvedIP, hostName, port, id, oldResolvedIP);
} finally {
@ -173,6 +213,18 @@ public class ServerChecker {
}
public static void main(String[] args) {
/*
for (String server : new String[]{
"moparcraft.net:25565", // minecraft
"www.moparcraft.net:54512", // nothing on this port
"www.moparcraft.net:80", // HTTP
"www.moparcraft.net:22", // SSH
"ftp.ietf.org:21", // FTP
"test.smtp.org:25", // SMTP
})
System.out.printf("validServer(%s): %b\n", server, validServer(8000, server.split(":")[0], Integer.parseInt(server.split(":")[1]), null, null, null));
if (true) return;
*/
if (args.length < 1) {
printToLog("Usage: ServerChecker \"jdbc:mysql://localhost:3306/dbname?user=user&password=pass\" [debug]");
return;