solution de proxy udp simple
https://stackoverflow.com/questions/1803329
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Je recherche une solution capable d’alimenter en proxy mes paquets UDP. J'ai un client qui envoie des paquets UDP à un serveur. La connexion entre eux est très mauvaise et j'entraîne beaucoup de pertes de paquets. Une solution consiste à avoir un nouveau serveur proxy qui redirigera simplement tous les paquets du client au serveur de destination. Le nouveau serveur proxy a une bonne connexion aux deux emplacements.
Jusqu'à présent, j'ai trouvé le proxy UDP simple. / pipe
Existe-t-il des outils à cette fin?
A bientôt
La solution 2
Voici le code Python écrit à cet effet:
import socket
from threading import Thread
class Proxy(Thread):
""" used to proxy single udp connection
"""
BUFFER_SIZE = 4096
def __init__(self, listening_address, forward_address):
print " Server started on", listening_address
Thread.__init__(self)
self.bind = listening_address
self.target = forward_address
def run(self):
# listen for incoming connections:
target = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
target.connect(self.target)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
s.bind(self.bind)
except socket.error, err:
print "Couldn't bind server on %r" % (self.bind, )
raise SystemExit
while 1:
datagram = s.recv(self.BUFFER_SIZE)
if not datagram:
break
length = len(datagram)
sent = target.send(datagram)
if length != sent:
print 'cannot send to %r, %r !+ %r' % (self.target, length, sent)
s.close()
if __name__ == "__main__":
LISTEN = ("0.0.0.0", 8008)
TARGET = ("localhost", 5084)
while 1:
proxy = Proxy(LISTEN, TARGET)
proxy.start()
proxy.join()
print ' [restarting] '
J'ai utilisé ces deux scripts pour le tester.
import socket
target = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
target.connect(("localhost", 8008))
print 'sending:', target.send("test data: 123456789")
et
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(("localhost", 5084))
while 1:
datagram = s.recv(1024)
if not datagram:
break
print repr(datagram)
s.close()
Autres conseils
J'ai aussi écrit un script Python pour ce jour. Celui-ci va dans les deux sens:
https://github.com/EtiennePerot/misc- scripts / blob / master / udp-relay.py
Utilisation: udp-relay.py localPort: remoteHost: remotePort
Ensuite, pointez votre application UDP sur localhost: localPort et tous les paquets seront renvoyés sur remoteHost: remotePort .
Tous les paquets renvoyés depuis remoteHost: remotePort seront renvoyés à l'application, en supposant qu'elle écoute sur le port à partir duquel elle vient d'envoyer des paquets.
Cette version renvoie une réponse. C'est bon pour un client seulement.
import socket
from threading import Thread
class Proxy(Thread):
""" used to proxy single udp connection
"""
BUFFER_SIZE = 4096
def __init__(self, listening_address, forward_address):
print " Server started on", listening_address
Thread.__init__(self)
self.bind = listening_address
self.target = forward_address
def run(self):
# listen for incoming connections:
target = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
target.connect(self.target)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
s.bind(self.bind)
except socket.error, err:
print "Couldn't bind server on %r" % (self.bind, )
raise SystemExit
while 1:
(datagram,addr) = s.recvfrom(self.BUFFER_SIZE)
if not datagram:
break
length = len(datagram)
sent = target.send(datagram)
if length != sent:
print 'cannot send to %r, %r !+ %r' % (self.s, length, sent)
datagram = target.recv(self.BUFFER_SIZE)
if not datagram:
break
length = len(datagram)
sent = s.sendto(datagram,addr)
if length != sent:
print 'cannot send to %r, %r !+ %r' % (self.s, length, sent)
s.close()
if __name__ == "__main__":
LISTEN = ("0.0.0.0", 5093)
TARGET = ("10.12.2.26", 5093)
while 1:
proxy = Proxy(LISTEN, TARGET)
proxy.start()
proxy.join()
print ' [restarting] '
Voici un travail Redirecteur TCP ou UDP / Proxy UDP / Tuyau UDP / Proxy TCP / Tuyau
J'ai créé de nombreux modèles de videurs de connexion de proxy UDP et ils semblent tous perdre leur connexion en utilisant la classe Sockets standard, mais en utilisant les classes UDPClient, ce problème a complètement disparu.
Le proxy UDP ne contient que 25 lignes de code, mais la puissance et la stabilité ne sont pas au rendez-vous
Vous trouverez ci-dessous des exemples sur la manière de le faire à la fois en TCP et en UDP
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Diagnostics;
using System.Net;
using System.Threading;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string Address= "*PUT IP ADDRESS HERE WHERE UDP SERVER IS*";
int UDPPort = *PUT UDP SERVER PORT HERE*;
UdpRedirect _UdpRedirect = new UdpRedirect() { _address = Address, _Port = UDPPort};
Thread _Thread = new Thread(_UdpRedirect.Connect);
_Thread.Name = "UDP";
_Thread.Start();
int TCPPort = *PUT TCP PORT HERE FOR TCP PROXY*;
TcpRedirect _TcpRedirect = new TcpRedirect(Address, TCPPort);
}
}
class UdpRedirect
{
public string _address;
public int _Port;
public UdpRedirect()
{
}
public void Connect()
{
UdpClient _UdpClient = new UdpClient(_Port);
int? LocalPort = null;
while (true)
{
IPEndPoint _IPEndPoint = null;
byte[] _bytes = _UdpClient.Receive(ref _IPEndPoint);
if (LocalPort == null) LocalPort = _IPEndPoint.Port;
bool Local = IPAddress.IsLoopback(_IPEndPoint.Address);
string AddressToSend = null;
int PortToSend = 0;
if (Local)
{
AddressToSend = _address;
PortToSend = _Port;
}
else
{
AddressToSend = "127.0.0.1";
PortToSend = LocalPort.Value;
}
_UdpClient.Send(_bytes, _bytes.Length, AddressToSend, PortToSend);
}
}
}
class TcpRedirect
{
public TcpRedirect(string _address, int _Port)
{
TcpListener _TcpListener = new TcpListener(IPAddress.Any, _Port);
_TcpListener.Start();
int i = 0;
while (true)
{
i++;
TcpClient _LocalSocket = _TcpListener.AcceptTcpClient();
NetworkStream _NetworkStreamLocal = _LocalSocket.GetStream();
TcpClient _RemoteSocket = new TcpClient(_address, _Port);
NetworkStream _NetworkStreamRemote = _RemoteSocket.GetStream();
Console.WriteLine("\n<<<<<<<<<connected>>>>>>>>>>>>>");
Client _RemoteClient = new Client("remote" + i)
{
_SendingNetworkStream = _NetworkStreamLocal,
_ListenNetworkStream = _NetworkStreamRemote,
_ListenSocket = _RemoteSocket
};
Client _LocalClient = new Client("local" + i)
{
_SendingNetworkStream = _NetworkStreamRemote,
_ListenNetworkStream = _NetworkStreamLocal,
_ListenSocket = _LocalSocket
};
}
}
public class Client
{
public TcpClient _ListenSocket;
public NetworkStream _SendingNetworkStream;
public NetworkStream _ListenNetworkStream;
Thread _Thread;
public Client(string Name)
{
_Thread = new Thread(new ThreadStart(ThreadStartHander));
_Thread.Name = Name;
_Thread.Start();
}
public void ThreadStartHander()
{
Byte[] data = new byte[99999];
while (true)
{
if (_ListenSocket.Available > 0)
{
int _bytesReaded = _ListenNetworkStream.Read(data, 0, _ListenSocket.Available);
_SendingNetworkStream.Write(data, 0, _bytesReaded);
Console.WriteLine("(((((((" + _bytesReaded + "))))))))))" + _Thread.Name + "\n" + ASCIIEncoding.ASCII.GetString(data, 0, _bytesReaded).Replace((char)7, '?'));
}
Thread.Sleep(10);
}
}
}
}
}
