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portube.py
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import select
import socket
import argparse
class Portube(object):
DATA_BLOCK = 4096
def __init__(self, laddr, lport, raddr, rport):
self.l_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.r_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.l_connected = None
self.r_connected = None
self.laddr = laddr
self.lport = lport
self.raddr = raddr
self.rport = rport
# -tran
# 本地开始监听port1端口，当port1端口上接收到来自客户端的主动连接之后，将主动连接ip:port2，并且负责port1端口和ip:port2之间的数据转发。
def port2host(self):
try:
self.l_socket.bind((self.laddr, self.lport))
self.l_socket.listen(1)
except Exception as reason:
print("Create Listen Port Failed!")
exit(0)
self.rlist = [self.l_socket]
self.wlist = []
self.elist = []
tube = []
while True:
rs, ws, es = select.select(self.rlist, self.wlist, self.elist)
for sockfd in rs:
if sockfd == self.l_socket:
self.l_connected, addr = sockfd.accept()
self.rlist.append(self.l_connected)
print("[√] Local connected:laddr={},raddr={}".format(self.l_connected.getsockname(),
self.l_connected.getpeername()))
try:
self.r_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.r_socket.connect((self.raddr, self.rport))
except Exception as reason:
print("Connect Source Port Failed!")
exit(0)
self.rlist.append(self.r_socket)
print("[√] Remote connected:laddr={},raddr={}".format(self.r_socket.getsockname(),
self.r_socket.getpeername()))
tube.append((self.l_connected, self.r_socket))
continue
else:
for tb in tube:
if sockfd in tb:
r_i = tb.index(sockfd)
w_i = 0 if r_i == 1 else 1
rr = self.copy(sockfd, tb[w_i])
if rr < 0:
self.rlist.remove(tb[0])
self.rlist.remove(tb[1])
tube.remove(tb)
print("[x] connect close:laddr={},raddr={}".
format(tb[0].getsockname(), tb[0].getpeername()))
tb[0].close()
print("[x] connect close:laddr={},raddr={}".
format(tb[1].getsockname(), tb[1].getpeername()))
tb[1].close()
# -slave
# 本地开始主动连接ip1:port1主机和ip2:port2主机，当连接成功之后，负责这两个主机之间的数据转发。
def host2host(self):
try:
self.l_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.l_socket.connect((self.laddr, self.lport))
self.r_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.r_socket.connect((self.raddr, self.rport))
except Exception as reason:
print("Connect Source Port Failed!")
exit(0)
self.rlist = [self.l_socket, self.r_socket]
self.wlist = []
self.elist = [self.l_socket, self.r_socket]
loop_w = True
while loop_w:
rs, ws, es = select.select(self.rlist, self.wlist, self.elist)
for sockfd in rs:
for i, v in enumerate(self.rlist):
ret = 0
rev = None
if sockfd == v and i % 2 == 0:
rev = self.rlist[i + 1]
ret = self.copy(sockfd, rev)
elif sockfd == v and i % 2 == 1:
rev = self.rlist[i - 1]
ret = self.copy(sockfd, rev)
if ret < 0:
self.rlist.remove(sockfd)
self.rlist.remove(rev)
print("[x] connect close:laddr={},raddr={}".
format(sockfd.getsockname(), sockfd.getpeername()))
sockfd.close()
print("[x] connect close:laddr={},raddr={}".
format(rev.getsockname(), rev.getpeername()))
rev.close()
loop_w = False
break
self.host2host()
# -listen
# 同时监听port1端口和port2端口，当两个客户端主动连接上这两个监听端口之后，负责这两个端口间的数据转发。
def port2port(self):
try:
self.l_socket.bind((self.laddr, self.lport))
self.l_socket.listen(1)
self.r_socket.bind((self.raddr, self.rport))
self.r_socket.listen(1)
except Exception as reason:
print("Create Listen Port Failed!")
exit(0)
self.rlist = [self.l_socket, self.r_socket]
self.wlist = []
self.elist = []
while True:
rs, ws, es = select.select(self.rlist, self.wlist, self.elist)
for sockfd in rs:
if sockfd == self.l_socket:
self.l_connected, addr = sockfd.accept()
self.rlist.append(self.l_connected)
continue
elif sockfd == self.r_socket:
self.r_connected, addr = sockfd.accept()
self.rlist.append(self.r_connected)
continue
else:
tube = self.rlist[2:]
if len(tube) < 2 or len(tube) % 2 == 1:
continue
for i, v in enumerate(tube):
ret = 0
rev = None
if sockfd == v and i % 2 == 0:
rev = tube[i + 1]
ret = self.copy(sockfd, rev)
elif sockfd == v and i % 2 == 1:
rev = tube[i - 1]
ret = self.copy(sockfd, rev)
if ret < 0:
self.rlist.remove(sockfd)
self.rlist.remove(rev)
print("[x] connect close:laddr={},raddr={}".
format(sockfd.getsockname(), sockfd.getpeername()))
sockfd.close()
print("[x] connect close:laddr={},raddr={}".
format(rev.getsockname(), rev.getpeername()))
rev.close()
def copy(self, reader, writer):
data = reader.recv(self.DATA_BLOCK)
if len(data) <= 0:
return -1
w = writer.send(data)
if w <= 0:
return -2
print("[->] tran [{}] : from {} to {} ".format(len(data), reader.getsockname(), writer.getsockname()))
return 0
def main():
parser = argparse.ArgumentParser()
parser.add_argument('type', help="[listen] [slave] [tran] [l] [s] [t]")
parser.add_argument('-l', '--laddr', dest='laddr', default='0.0.0.0', help="IP eg: 0.0.0.0")
parser.add_argument("-p", "--lport", dest="lport", help="Port eg: 3306")
parser.add_argument('-R', '--raddr', dest='raddr', default='0.0.0.0', help="IP eg: 0.0.0.0")
parser.add_argument("-P", "--rport", dest="rport", help="Port eg: 3306")
options = parser.parse_args()
pt = Portube(options.laddr, int(options.lport), options.raddr, int(options.rport))
if options.type in ("listen", "l"):
pt.port2port()
elif options.type in ("slave", "s"):
pt.host2host()
elif options.type in ("tran", "t"):
pt.port2host()
if __name__ == "__main__":
main()