Is there a way to send a login packet to Minecraft server from Python?
Here is what I have right now:
import socket
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
addr = ("localhost", 25565)
client.connect(addr)
client.sendall(chr(0x02))
client.sendall(chr(0xFD))
client.sendall(chr(0xCD)) # After sending this line server still don't kick me
client.sendall(chr(0x06)+str(117)+str(70)+str(-46)) # And now server kicks me :-(
client.sendall(chr(0x03)+str("Hello World"))
print client.recv(4096)
client.close()
I'd like to send login packets with a non-premium username (or one that doesn't exist if it is possible)
An alternative would be to use someone-else's python library that does it for you - like quarry or others mentioned here. Also see this related question.
Related
I am using Ratchet WebSocket in a Windows-based server project that is entirely working in an insecure environment. That is to say that when I navigate my browser to http://www.example.com and connect to the websocket server using ws:// on port 8686 everything works spectacularly.
The server doesn't run through IIS - but instead is executed via php.exe in command prompt like this.
php wsocket-server.php [...parameters...]
However, if run the Ratchet Server and try to connect from https://www.example.com using wss:// the browser simply will not connect to the websocket server, despite the fact that the server starts up fine and the insecure site and connect via ws://
Now, I realize I need to utilize some additional code to include my SSL documentation. This is the relevant code I have in place:
use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
$websocket_server = new WsServer();
if ($site_secure){
//RUN WSS (SECURE) SERVER
$options = [
'local_cert' => 'c:\inetpub\ssl\2c6fa1928847451c.crt',
'local_pk' => 'c:\inetpub\ssl\2c6fa1928847451c.key',
'allow_self_signed' => true,
'verify_peer' => false
];
$loop = React\EventLoop\Factory::create();
$websocket_server->enableKeepAlive($loop);
$app = new HttpServer($websocket_server);
$insecure_websockets = new \React\Socket\Server('0.0.0.0:'.$port, $loop);
$secure_websockets = new \React\Socket\SecureServer($insecure_websockets , $loop, $options);
$secure_websockets_server = new \Ratchet\Server\IoServer($app, $secure_websockets, $loop);
$secure_websockets_server->run();
}else{
//RUN WS (INSECURE) SERVER
$http_server = new HttpServer($websocket_server);
$server = IoServer::factory($http_server, $port);
$websocket->log ("Initializing ".(($site_secure) ? "Secure " : "Insecure ")."Server ($port)");
$server->run();
}
What I have tried
I have ensured the correct ports are all open in the windows firewall.
I have ensured nothing else is listening on the port using netstat
I have tried using nginx, on a minimal level. I'd prefer to NOT use this method if possible, and was having some initial problems with it starting up so I did not dedicate 100% to it at this time. Ideally, I'd like to use Ratchet's native abilities.
I have searched other similar posts both here and elsewhere, such as this.
I have tried a number of different ports, even the same 8686 as I use in the insecure connection
I am hoping someone can lend me an assist with an issue that has been driving me crazy for 2 weeks. At this point I feel like I'm just trying things to try them and I may be coding myself in circles.
Thank you in advance.
A browser is never going to connect to anything running on port 465. Especially not a WebSocket.
Establishing a WebSocket connection is specified in terms of the Fetch standard. As such, the specific exclusion of this port is found within the latter:
A port is a bad port if it is listed in the first column of the following table.
Port
Typical service
…
…
465
submission
…
…
Now, why are some ports blacklisted? This is a protection against cross-protocol scripting attacks, as once demonstrated (warning: NSFW links) against Firefox and against Safari. Port 465 has been (and still sometimes is) used for SMTP over (pure) TLS, so in this case, an XPS attack might trick a browser into sending mail on the user’s behalf. Blocking those ports is meant to prevent it. Of course, all bets are off when a service runs on a non-standard port.
To make the service available in a browser, all you need to do is change the port number.
I have people cheating in my game by sending multiple HTTP POST message the game server (php + apache) to gain items. I have fixed that loophole but I want to test if my fix was correct.
I have tried some of the chrome plugin to send POST messages but I cant imitate sending them in the same instant, for example 5 identical POST message all send out less that 100ms to the same IP in between them.
I have a Centos and a windows machine, would appreciate any script or program recommendation.
If you have Python installed (your CentOS machine would), the following will do what you're after using only built-ins. You'll just need to tweak the conn.request line to pass in any body or headers your server requires.
from threading import Thread
import httplib, sys
REQUESTS = 5
def doRequest():
conn = httplib.HTTPConnection("www.google.com")
conn.request("POST", '/some/url')
for i in range(REQUESTS):
t = Thread(target=doRequest)
t.daemon = True
t.start()
To anyone who can help,
I am having a show stopping issue connecting to the test server.
My TCP/IP connection is established via:
Socket _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
I send the connection message to the server via:
_socket.Send(_txData);
where _txData is a byte[] _txData array initialized with the connection request message:
8=FIX.4.4\0019=121\00135=A\00149=NotRealSenderID\0 0156=NotRealTargetID\00134=1\00152=20140522-20:12:04.392\00198=0\001108=30\001554=NotRealPassw ord\00110=017\001 converted to a byte array.
I wait for the login success message via:
int responseCount = _socket.Receive(_rxBuffer);
but after a few seconds, the _socket.Receive unblocks and returns zero bytes suggesting unsuccessful connection.
What am I doing wrong?
Is my login message at fault? Is it the way I establish server connection? I am at a loss!
Currently, My default Windows 7 Firewall is disabled, and I attempted to telnet into the server, and the image below snapshots the outcome:
Any help will be appreciated, as this is a major show stopper for me.
Thanks.
I managed to resolve this issue. The problem was with the SOH character in my message.
I was using the literal SOH = "\001" converted to a byte, when I should have done this: SOH = (char) 0x1; DUH!!
For the record, I used the following tools to 'debug' this issue:
Wireshark with display filter and capture filter set to the host server's ip address, and MINI-FIX to generate and transmit FIX messages to the host server.
I then compared the output from my client to those produced by MINI-FIX via Wireshark. It didn't take me long to spot the error from there.
What is "the test server" ?
Can you ping it ?
From the look of that telnet session you haven't permission to make a connection, or there is nothing running at the destination.
I'm writing a Python program consisting of a server (using Twisted) and a client (without Twisted)
The server part is implemented using Twisted and Twisted's application framework and launched with Twistd to be daemonized.
The client which runs on a different server is a simple Python script without any Twisted stuff (and no application framework specific stuff). It should also be run as a Daemon. FYI, this is the source:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import socket
import sys
import time
import syslog
SERVER_IP = '127.0.0.1'
SERVER_PORT = 43278
BEAT_PERIOD = 1
class HeartbeatClient:
'''
A Client sending heartbeats to a monitoring server.
'''
def __init__(self, server_ip, port, beat_period):
syslog.syslog( ('Sending heartbeat to IP %s , port %d' +
'\n press Ctrl-C to stop\n')
% (SERVER_IP, SERVER_PORT))
def run(self):
while True:
hbSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
hbSocket.sendto('PyHB', (SERVER_IP, SERVER_PORT))
if __debug__:
print 'Time: %s' % time.ctime()
time.sleep(BEAT_PERIOD)
if __name__ == '__main__':
hbc = HeartbeatClient()
hbc.run()
Now I wonder if I can daemonize the client also with Twistd? Therefore I would have create an Twisted-Application out of the client. But all examples I saw concerning Twisted applications where implementing some Twisted internet-server stuff (like in my case internet.UDPServer...), which my client does not use.
So is it possible to use Twistd to launch my client as a daemon, and what changes do I have to make? Should I rewrite the client to take full use of Twisted? If yes, are there any similar examples out there how to write a Twisted based network client?
Or do I have to use a different daemonize library for the client? There is a good library for that, but I'm trying to be consistent and use the same daemonizing mechanism for client and server.
With Twisted, as a tac file, your HeartbeatClient would look something like this:
from twisted.application.service import Application, Service
from twisted.internet import reactor
from twisted.internet.task import LoopingCall
from twisted.internet.protocol import DatagramProtocol
class HeartbeatClient(Service):
def startService(self):
self._call = LoopingCall(self._heartbeat)
self._call.start(BEAT_PERIOD)
def stopService(self):
self._call.stop()
def _heartbeat(self):
port = reactor.listenUDP(0, DatagramProtocol())
port.write('PyHB', (SERVER_IP, SERVER_PORT))
port.stopListening()
application = Application("PyHB")
HeartbeatClient().setServiceParent(application)
Note the use of reactor.listenUDP, even though you're only sending UDP datagrams, not receiving any. UDP doesn't really have the concept of clients and servers, it only has open ports. All UDP ports can send and receive datagrams. That's why there's only reactor.listenUDP, not reactor.connectUDP.
Aside from that, LoopingCall gives you the loop you want, and putting the code into a custom Service subclass lets you start and stop the loop at the appropriate times.
I was told that my program was not issuing a MAIL/EXPN/VRFY/ETRN when sending an email by the web hosting company we are connecting to.
Anyone know what this means and how I do it?
I am sending an email with SmtpClient and I have no problems with other clients.
Here is what I was told:
Thanks for the additional info, here
is what I found...
Aug 4 11:16:48 smtp1 sendmail[2729]:
o74GGU5F002729:
xx-xx-xx-xx.static.xxx.mo.charter.com
[xx.xx.xx.xx] did not issue
MAIL/EXPN/VRFY/ETRN during connection
to TLSMTA
Notice the time and the IP address
which is your static from Charter. Now
here is a good connection.
Aug 4 11:18:22 smtp1 sendmail[2745]:
STARTTLS=server,
relay=xx.xx.xx.xx.static.xxx.mo.charter.com [xx.xx.xx.xx], version=TLSv1/SSLv3,
verify=NO, cipher=RC4-MD5,
bits=128/128 Aug 4 11:18:23 smtp1
sendmail[2745]: AUTH=server,
relay=xx.xx.xx.xx.static.stls.mo.charter.com
[xx.xx.xx.xx], authid=ronmid,
mech=LOGIN, bits=0
Since their email program did not
issue MAIL/EXPN/VRFY/ETRN during
connection, my server would not
continue the transaction.
Any suggestions?
Thanks!
You app didn't issue any of those 4 commands after connecting. This could be because the server didn't respond correctly and so your app was waiting for that response until it timed out. You can check this by trying to send an email with a simple telnet connection as described here. After you connect and send the EHLO or HELO command (depending on what the server wants) you should get a 250 response.
If you do get the 250 response with telnet but your app still doesn't work, then maybe it's something in your application that tries to send an incorrect command. Maybe you've setup your application to use SSL or credentials, and the SMTP server don't support that or something similar?