mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-23 08:11:00 +00:00
70 lines
3.0 KiB
Python
70 lines
3.0 KiB
Python
from __future__ import absolute_import
|
|
import select, socket
|
|
from .primitives import ProtocolHandler
|
|
from netlib.utils import cleanBin
|
|
|
|
class TCPHandler(ProtocolHandler):
|
|
"""
|
|
TCPHandler acts as a generic TCP forwarder.
|
|
Data will be .log()ed, but not stored any further.
|
|
"""
|
|
|
|
chunk_size = 4096
|
|
|
|
def handle_messages(self):
|
|
self.c.establish_server_connection()
|
|
|
|
server = "%s:%s" % self.c.server_conn.address()[:2]
|
|
buf = memoryview(bytearray(self.chunk_size))
|
|
conns = [self.c.client_conn.rfile, self.c.server_conn.rfile]
|
|
|
|
try:
|
|
while True:
|
|
r, _, _ = select.select(conns, [], [], 10)
|
|
for rfile in r:
|
|
if self.c.client_conn.rfile == rfile:
|
|
src, dst = self.c.client_conn, self.c.server_conn
|
|
direction = "-> tcp ->"
|
|
src_str, dst_str = "client", server
|
|
else:
|
|
dst, src = self.c.client_conn, self.c.server_conn
|
|
direction = "<- tcp <-"
|
|
dst_str, src_str = "client", server
|
|
|
|
closed = False
|
|
if src.ssl_established:
|
|
# Unfortunately, pyOpenSSL lacks a recv_into function.
|
|
contents = src.rfile.read(1) # We need to read a single byte before .pending() becomes usable
|
|
contents += src.rfile.read(src.connection.pending())
|
|
if not contents:
|
|
closed = True
|
|
else:
|
|
size = src.connection.recv_into(buf)
|
|
if not size:
|
|
closed = True
|
|
|
|
if closed:
|
|
conns.remove(src.rfile)
|
|
# Shutdown connection to the other peer
|
|
if dst.ssl_established:
|
|
dst.connection.shutdown()
|
|
else:
|
|
dst.connection.shutdown(socket.SHUT_WR)
|
|
|
|
if len(conns) == 0:
|
|
return
|
|
continue
|
|
|
|
if src.ssl_established or dst.ssl_established:
|
|
# if one of the peers is over SSL, we need to send bytes/strings
|
|
if not src.ssl_established: # only ssl to dst, i.e. we revc'd into buf but need bytes/string now.
|
|
contents = buf[:size].tobytes()
|
|
self.c.log("%s %s\r\n%s" % (direction, dst_str, cleanBin(contents)), "debug")
|
|
dst.connection.send(contents)
|
|
else:
|
|
# socket.socket.send supports raw bytearrays/memoryviews
|
|
self.c.log("%s %s\r\n%s" % (direction, dst_str, cleanBin(buf.tobytes())), "debug")
|
|
dst.connection.send(buf[:size])
|
|
except socket.error as e:
|
|
self.c.log("TCP connection closed unexpectedly.", "debug")
|
|
return |