Question

我正在寻找可以代理我的udp数据包的解决方案。我有一个客户端将udp数据包发送到服务器。它们之间的连接非常糟糕，我丢失了很多数据包。一种解决方案是拥有一个新的代理服务器，它只会将所有数据包从客户端重定向到目标服务器。新的代理服务器与两个位置都有良好的连接。

到目前为止，我找到了简单UDP proxy/pipe

是否有一些工具用于此目的？

干杯

Answer 1

我有一天也写了一个Python脚本。这个有两个方面：

https://github.com/EtiennePerot/misc-scripts/blob/master/udp-relay.py

用法：udp-relay.py localPort:remoteHost:remotePort

然后，将您的UDP应用程序指向localhost:localPort，所有数据包都将跳转到remoteHost:remotePort。

从remoteHost:remotePort发回的所有数据包都将被退回到应用程序，假设它正在侦听刚才发送数据包的端口。

Answer 2

以下是为此目的编写的Python代码：

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] '

我用这两个脚本来测试它。

import socket

target = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
target.connect(("localhost", 8008))
print 'sending:', target.send("test data: 123456789")

和

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()

Answer 3

此版本发回一个回复。这对一个客户来说只是好事。

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] '

Answer 4

这是一个工作 TCP或UDP重定向器/ UDP代理/ UDP管道/ TCP代理/ TCP管道

我创建了许多不同型号的UDP代理连接保镖，它们似乎都失去了使用标准套接字类的连接，但是使用UDPClient类这个问题完全消失了。

UDP代理只有25行代码，但功耗和稳定性不在图表中

下面是如何在TCP和UDP中执行此操作的示例

do {
    try NSFileManager.defaultManager().createDirectoryAtPath(pathURL.absoluteString, withIntermediateDirectories: true, attributes: nil)
} catch {
    print(error)
}

简单的udp代理解决方案

4 个答案: