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1. 在B服务器上运行： lcx l:10001 l:10002 表示在本地监听了10001与10002两个端口，这样，这两个端口就可以互相传输数据了。 2. 在A服务器上运行： ./rtcp.py c:localhost:22 c:222.2.2.2:10001 表示连接本地的22端口与B服务器的10001端口，这两个端口也可以互相传输数据了。 3. 然后我们就可以这样来访问A服务器的22端口了： ssh 222.2.2.2 -p 10002 s = targv[i]  # stream描述 c:ip:port 或 l:port sl = s.split(':') t = threading.Thread(target=_connect, args=(sl[1], int(sl[2]), i)) num=0 sl[1] = localhost sl[2] = 22 num=1 sl[1] = 222.2.2.2 sl[2] = 10001 num -> 0先进入connect 连接ssh streams[0] = conn _get_another_stream,获取另外一端的数据;如果没有就等待. return streams[1] ..... num -> 1 connect streams[1] = conn streams[1]有内容了到streams[0]操作了 ...... _xstream(num, conn{这个就是连接ssh}, s2):     连接到的ssh转发到streams[1]去. ...... _get_another_stream _xstream _connect main-thread #-* -coding: UTF-8 -* - ''' Created on 2012-5-8 @author: qh ''' import time,socket,threading def log(strLog):     strs=time.strftime("%Y-%m-%d %H:%M:%S")     print strs+"->"+strLog class pipethread(threading.Thread):     '''     classdocs     '''     def __init__(self,source,sink):         '''         Constructor         '''         threading.Thread.__init__(self)         self.source=source         self.sink=sink         log("New Pipe create:%s->%s" % (self.source.getpeername(),self.sink.getpeername()))     def run(self):         while True:             try:                 data=self.source.recv(1024)                 if not data: break                 self.sink.send(data)             except Exception ,ex:                 log("redirect error:"+str(ex))                 break         self.source.close()         self.sink.close() class portmap(threading.Thread):     def __init__(self,port,newhost,newport,local_ip=''):         threading.Thread.__init__(self)         self.newhost=newhost         self.newport=newport         self.port=port         self.local_ip=local_ip         self.sock=None         self.sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)         self.sock.bind((self.local_ip,port))         self.sock.listen(5)         log("start listen protocol:%s,port:%d " % ('tcp',port))     def run(self):         while True:             fwd=None             newsock=None             newsock,address=self.sock.accept()             log("new connection->protocol:%s,local port:%d,remote address:%s" % ('tcp',self.port,address[0]))             fwd=socket.socket(socket.AF_INET,socket.SOCK_STREAM)             try:                 fwd.connect((self.newhost,self.newport))             except Exception ,ex:                 log("connet newhost error:"+str(ex))                 break             p1=pipethread(newsock,fwd,self.protocol)             p1.start()             p2=pipethread(fwd,newsock,self.protocol)             p2.start() class pipethreadUDP(threading.Thread):     def __init__(self,connection,connectionTable,table_lock):         threading.Thread.__init__(self)         self.connection=connection         self.connectionTable=connectionTable         self.table_lock=table_lock         log('new thread for new connction')     def run(self):         while True:             try:                 data,addr=self.connection['socket'].recvfrom(4096)                 #log('recv from addr"%s' % str(addr))             except Exception ,ex:                 log("recvfrom error:"+str(ex))                 break             try:                 self.connection['lock'].acquire()                 self.connection['Serversocket'].sendto(data,self.connection['address'])                 #log('sendto address:%s' % str(self.connection['address']))             except Exception ,ex:                 log("sendto error:"+str(ex))                 break             finally:self.connection['lock'].release()             self.connection['time']=time.time()         self.connection['socket'].close()         log("thread exit for: %s" % str(self.connection['address']))         self.table_lock.acquire()         self.connectionTable.pop(self.connection['address'])         self.table_lock.release()         log('Release udp connection for timeout:%s' % str(self.connection['address'])) class portmapUDP(threading.Thread):     def __init__(self,port,newhost,newport,local_ip=''):         threading.Thread.__init__(self)         self.newhost=newhost         self.newport=newport         self.port=port         self.local_ip=local_ip         self.sock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)         self.sock.bind((self.local_ip,port))         self.connetcTable={}         self.port_lock=threading.Lock()         self.table_lock=threading.Lock()         self.timeout=300         #ScanUDP(self.connetcTable,self.table_lock).start()         log('udp port redirect run->local_ip:%s,local_port:%d,remote_ip:%s,remote_port:%d' % (local_ip,port,newhost,newport))     def run(self):         while True:             data,addr=self.sock.recvfrom(4096)             connection=None             newsock=None             self.table_lock.acquire()             connection=self.connetcTable.get(addr)             newconn=False             if connection is None:                 connection={}                 connection['address']=addr                 newsock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)                 newsock.settimeout(self.timeout)                 connection['socket']=newsock                 connection['lock']=self.port_lock                 connection['Serversocket']=self.sock                 connection['time']=time.time()                 newconn=True                 log('new connection:%s' % str(addr))             self.table_lock.release()             try:                 connection['socket'].sendto(data,(self.newhost,self.newport))             except Exception ,ex:                 log("sendto error:"+str(ex))                 #break             if newconn:                 self.connetcTable[addr]=connection                 t1=pipethreadUDP(connection,self.connetcTable,self.table_lock)                 t1.start()         log('main thread exit')         for key in self.connetcTable.keys():             self.connetcTable[key]['socket'].close() if __name__=='__main__':     myp=portmapUDP(10061,'10.0.1.29',161)     myp.start()     #myp.__stop()

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