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PyBitmessage-2021-04-27
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Proxy update (for the new network subsystem)

This commit is contained in:
Peter Šurda 2017-01-10 21:22:22 +01:00
parent 75090abaaf
commit 085e335969
Signed by untrusted user: PeterSurda
GPG Key ID: 0C5F50C0B5F37D87
1 changed files with 72 additions and 123 deletions
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195
src/network/proxy.py
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@ -4,13 +4,13 @@ import asyncore
import socket import socket
import struct import struct
from advanceddispatcher import AdvancedDispatcher
class Proxy(asyncore.dispatcher): class Proxy(AdvancedDispatcher):
# these are global, and if you change config during runtime, all active/new # these are global, and if you change config during runtime, all active/new
# instances should change too # instances should change too
_proxy = ["", 1080] _proxy = ["", 1080]
_auth = None _auth = None
_buf_len = 131072
_remote_dns = True _remote_dns = True
@property @property
@ -34,46 +34,17 @@ class Proxy(asyncore.dispatcher):
def __init__(self, address=None): def __init__(self, address=None):
if (not type(address) in (list,tuple)) or (len(address) < 2) or (type(address[0]) != type('')) or (type(address[1]) != int): if (not type(address) in (list,tuple)) or (len(address) < 2) or (type(address[0]) != type('')) or (type(address[1]) != int):
raise raise
asyncore.dispatcher.__init__(self, self.sock) AdvancedDispatcher.__init__(self, self.sock)
self.destination = address self.destination = address
self.read_buf = ""
self.write_buf = ""
self.stage = "init"
self.create_socket(socket.AF_INET, socket.SOCK_STREAM) self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.sslSocket.setblocking(0) self.sslSocket.setblocking(0)
self.connect(self.proxy) self.connect(self.proxy)
def process(self):
try:
getattr(self, "state_" + str(self.stage))()
except AttributeError:
# missing stage
raise
def set_state(self, state):
self.state = state
self.read_buf = ""
def writable(self):
return len(self.write_buf) > 0
def readable(self):
return len(self.read_buf) < Proxy._buf_len
def handle_read(self):
self.read_buf += self.recv(Proxy._buf_len)
self.process()
def handle_write(self):
written = self.send(self.write_buf)
self.write_buf = self.write_buf[written:]
self.process()
class SOCKS5(Proxy): class SOCKS5(Proxy):
def __init__(self, address=None, sock=None): def __init__(self, address=None, sock=None):
Proxy.__init__(self, address) Proxy.__init__(self, address)
self.state = 0 self.state = "init"
def handle_connect(self): def handle_connect(self):
self.process() self.process()
@ -83,11 +54,11 @@ class SOCKS5(Proxy):
self.write_buf += struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02) self.write_buf += struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02)
else: else:
self.write_buf += struct.pack('BBB', 0x05, 0x01, 0x00) self.write_buf += struct.pack('BBB', 0x05, 0x01, 0x00)
self.set_state("auth_1") self.set_state("auth_1", 0)
def state_auth_1(self): def state_auth_1(self):
if len(self.read_buf) < 2: if not self.read_buf_sufficient(2):
return return False
ret = struct.unpack('BB', self.read_buf) ret = struct.unpack('BB', self.read_buf)
self.read_buf = self.read_buf[2:] self.read_buf = self.read_buf[2:]
if ret[0] != 5: if ret[0] != 5:
@ -95,13 +66,13 @@ class SOCKS5(Proxy):
raise raise
elif ret[1] == 0: elif ret[1] == 0:
# no auth required # no auth required
self.set_state("auth_done") self.set_state("auth_done", 2)
elif ret[1] == 2: elif ret[1] == 2:
# username/password # username/password
self.write_buf += struct.pack('BB', 1, len(self._auth[0])) + \ self.write_buf += struct.pack('BB', 1, len(self._auth[0])) + \
self._auth[0] + struct.pack('B', len(self._auth[1])) + \ self._auth[0] + struct.pack('B', len(self._auth[1])) + \
self._auth[1] self._auth[1]
self.set_state("auth_1") self.set_state("auth_1", 2)
else: else:
if ret[1] == 0xff: if ret[1] == 0xff:
# auth error # auth error
@ -111,8 +82,8 @@ class SOCKS5(Proxy):
raise raise
def state_auth_needed(self): def state_auth_needed(self):
if len(self.read_buf) < 2: if not self.read_buf_sufficient(2):
return return False
ret = struct.unpack('BB', self.read_buf) ret = struct.unpack('BB', self.read_buf)
if ret[0] != 1: if ret[0] != 1:
# general error # general error
@ -121,37 +92,11 @@ class SOCKS5(Proxy):
# auth error # auth error
raise raise
# all ok # all ok
self.set_state = ("auth_done") self.set_state = ("auth_done", 2)
class SOCKS5Connection(SOCKS5):
def __init__(self, address):
SOCKS5.__init__(self, address)
def state_auth_done(self):
# Now we can request the actual connection
self.write_buf += struct.pack('BBB', 0x05, 0x01, 0x00)
# If the given destination address is an IP address, we'll
# use the IPv4 address request even if remote resolving was specified.
try:
ipaddr = socket.inet_aton(self.destination[0])
self.write_buf += chr(0x01).encode() + ipaddr
except socket.error:
# Well it's not an IP number, so it's probably a DNS name.
if Proxy._remote_dns:
# Resolve remotely
ipaddr = None
self.write_buf += chr(0x03).encode() + chr(len(self.destination[0])).encode() + self.destination[0]
else:
# Resolve locally
ipaddr = socket.inet_aton(socket.gethostbyname(self.destination[0]))
self.write_buf += chr(0x01).encode() + ipaddr
self.write_buf += struct.pack(">H", self.destination[1])
self.set_state = ("pre_connect")
def state_pre_connect(self): def state_pre_connect(self):
if len(self.read_buf) < 4: if not self.read_buf_sufficient(4):
return return False
# Get the response # Get the response
if self.read_buf[0:1] != chr(0x05).encode(): if self.read_buf[0:1] != chr(0x05).encode():
# general error # general error
@ -168,74 +113,78 @@ class SOCKS5Connection(SOCKS5):
raise raise
#raise Socks5Error((9, _socks5errors[9])) #raise Socks5Error((9, _socks5errors[9]))
# Get the bound address/port # Get the bound address/port
elif self_read_buf[3:4] == chr(0x01).encode(): elif self.read_buf[3:4] == chr(0x01).encode():
self.set_state("proxy_addr_long") self.set_state("proxy_addr_1", 4)
elif resp[3:4] == chr(0x03).encode(): elif self.read_buf[3:4] == chr(0x03).encode():
self.set_state("proxy_addr_short") self.set_state("proxy_addr_2_1", 4)
else: else:
self.close() self.close()
raise GeneralProxyError((1,_generalerrors[1])) raise GeneralProxyError((1,_generalerrors[1]))
boundport = struct.unpack(">H", self.__recvall(2))[0]
self.__proxysockname = (boundaddr, boundport)
if ipaddr != None:
self.__proxypeername = (socket.inet_ntoa(ipaddr), destport)
else:
self.__proxypeername = (destaddr, destport)
def state_proxy_addr_long(self): def state_proxy_addr_1(self):
if len(self.read_buf) < 4: if not self.read_buf_sufficient(4):
return return False
self.boundaddr = self.read_buf[0:4] self.boundaddr = self.read_buf[0:4]
self.set_state("proxy_port") self.set_state("proxy_port", 4)
def state_proxy_addr_short(self): def state_proxy_addr_2_1(self):
if len(self.read_buf) < 1: if not self.read_buf_sufficient(1):
return return False
self.boundaddr = self.read_buf[0:1] self.address_length = ord(self.read_buf[0:1])
self.set_state("proxy_port") self.set_state("proxy_addr_2_2", 1)
def state_proxy_addr_2_2(self):
if not self.read_buf_sufficient(self.address_length):
return False
self.boundaddr = read_buf
self.set_state("proxy_port", self.address_length)
def state_proxy_port(self): def state_proxy_port(self):
if len(self.read_buf) < 2: if not self.read_buf_sufficient(2):
return return False
self.boundport = struct.unpack(">H", self.read_buf[0:2])[0] self.boundport = struct.unpack(">H", self.read_buf[0:2])[0]
self.__proxysockname = (self.boundaddr, self.boundport) self.__proxysockname = (self.boundaddr, self.boundport)
if ipaddr != None: if self.ipaddr != None:
self.__proxypeername = (socket.inet_ntoa(ipaddr), destport) self.__proxypeername = (socket.inet_ntoa(self.ipaddr), self.destination[1])
else: else:
self.__proxypeername = (destaddr, destport) self.__proxypeername = (self.destination[1], destport)
class SOCKS5Resolver(SOCKS5): class SOCKS5Connection(SOCKS5):
def __init__(self, destpair): def __init__(self, address):
SOCKS5.__init__(self, destpair) SOCKS5.__init__(self, address)
def state_auth_done(self): def state_auth_done(self):
# Now we can request the actual connection # Now we can request the actual connection
req = struct.pack('BBB', 0x05, 0xF0, 0x00) self.write_buf += struct.pack('BBB', 0x05, 0x01, 0x00)
req += chr(0x03).encode() + chr(len(host)).encode() + host # If the given destination address is an IP address, we'll
req = req + struct.pack(">H", 8444) # use the IPv4 address request even if remote resolving was specified.
self.sendall(req) try:
# Get the response self.ipaddr = socket.inet_aton(self.destination[0])
ip = "" self.write_buf += chr(0x01).encode() + ipaddr
resp = self.__recvall(4) except socket.error:
if resp[0:1] != chr(0x05).encode(): # Well it's not an IP number, so it's probably a DNS name.
self.close() if Proxy._remote_dns:
raise GeneralProxyError((1, _generalerrors[1])) # Resolve remotely
elif resp[1:2] != chr(0x00).encode(): self.ipaddr = None
# Connection failed self.write_buf += chr(0x03).encode() + chr(len(self.destination[0])).encode() + self.destination[0]
self.close()
if ord(resp[1:2])<=8:
raise Socks5Error((ord(resp[1:2]), _socks5errors[ord(resp[1:2])]))
else: else:
raise Socks5Error((9, _socks5errors[9])) # Resolve locally
# Get the bound address/port self.ipaddr = socket.inet_aton(socket.gethostbyname(self.destination[0]))
elif resp[3:4] == chr(0x01).encode(): self.write_buf += chr(0x01).encode() + ipaddr
ip = socket.inet_ntoa(self.__recvall(4)) self.write_buf += struct.pack(">H", self.destination[1])
elif resp[3:4] == chr(0x03).encode(): self.set_state = ("pre_connect", 0)
resp = resp + self.recv(1)
ip = self.__recvall(ord(resp[4:5]))
else: class SOCKS5Resolver(SOCKS5):
self.close() def __init__(self, host):
raise GeneralProxyError((1,_generalerrors[1])) self.host = host
boundport = struct.unpack(">H", self.__recvall(2))[0] self.port = 8444
return ip SOCKS5.__init__(self, [self.host, self.port])
def state_auth_done(self):
# Now we can request the actual connection
self.write_buf += struct.pack('BBB', 0x05, 0xF0, 0x00)
self.write_buf += chr(0x03).encode() + chr(len(self.host)).encode() + self.host
self.write_buf += struct.pack(">H", self.port)
self.state = "pre_connect"