def _handle_stage_reply(self, data):
if self._is_local:
data = self._encryptor.encrypt(data)
self._data_to_write_to_remote.append(data)
if self._is_local and not self._fastopen_connected and \
self._config['fast_open']:
try:
self._fastopen_connected = True
remote_sock = \
self._create_remote_socket(self._chosen_server[0],
self._chosen_server[1])
self._loop.add(remote_sock, eventloop.POLL_ERR)
data = ''.join(self._data_to_write_to_local)
l = len(data)
s = remote_sock.sendto(data, MSG_FASTOPEN, self._chosen_server)
if s < l:
data = data[s:]
self._data_to_write_to_local = [data]
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
else:
self._data_to_write_to_local = []
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
self._stage = STAGE_STREAM
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
elif eventloop.errno_from_exception(e) == errno.ENOTCONN:
logging.error('fast open not supported on this OS')
self._config['fast_open'] = False
self.destroy()
else:
logging.error(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _handle_stage_connecting(self, data):
# 客户端读取web数据进行ota生成，服务器获取客户端数据，进行ota校验
# upstream数据才进行ota，downstream不进行ota
# 收到local_sock数据，放到data_to_write_to_remote
if self._is_local:
# 客户端接收到浏览器的数据要加密
if self._ota_enable:
data = self._ota_chunk_data_gen(data)
data = self._encryptor.encrypt(data)
self._data_to_write_to_remote.append(data)
else:
# 服务器接收客户端的数据，在数据读取的时候已经解密
if self._ota_enable:
self._ota_chunk_data(data,
self._data_to_write_to_remote.append)
else:
self._data_to_write_to_remote.append(data)
if self._is_local and not self._fastopen_connected and \
self._config['fast_open']:
# for sslocal and fastopen, we basically wait for data and use
# sendto to connect
try:
# only connect once
self._fastopen_connected = True
remote_sock = \
self._create_remote_socket(self._chosen_server[0],
self._chosen_server[1])
self._loop.add(remote_sock, eventloop.POLL_ERR, self._server)
data = b''.join(self._data_to_write_to_remote)
l = len(data)
# tcp 直接sendto
s = remote_sock.sendto(data, MSG_FASTOPEN, self._chosen_server)
# 处理没法送完的包
if s < l:
data = data[s:]
self._data_to_write_to_remote = [data]
else:
self._data_to_write_to_remote = []
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
# in this case data is not sent at all
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
elif eventloop.errno_from_exception(e) == errno.ENOTCONN:
logging.error('fast open not supported on this OS')
self._config['fast_open'] = False
self.destroy()
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _write_to_sock(self, data, sock):
if not data or not sock:
return
uncomplete = False
try:
l = len(data)
s = sock.send(data)
if s < l:
data = data[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS):
uncomplete = True
else:
logging.error(e)
self.destroy()
if uncomplete:
if sock == self._local_sock:
self._data_to_write_to_local.append(data)
self._update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
elif sock == self._remote_sock:
self._data_to_write_to_remote.append(data)
self._update_stream(STREAM_UP, WAIT_STATUS_WRITING)
else:
logging.error('write_all_to_sock:unknown socket')
else:
if sock == self._local_sock:
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
elif sock == self._remote_sock:
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
else:
logging.error('write_all_to_sock:unknown socket')
def _handle_events(self, events):
for sock, fd, event in events:
# if sock:
# logging.debug('fd %d %s', fd,
# eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
if event & eventloop.POLL_ERR:
# TODO
raise Exception('server_socket error')
try:
# logging.debug('accept')
conn = self._server_socket.accept()
TCPRelayHandler(self, self._fd_to_handlers, self._eventloop,
conn[0], self._config, self._is_local)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS):
continue
else:
logging.error(e)
else:
if sock:
handler = self._fd_to_handlers.get(fd, None)
if handler:
handler.handle_event(sock, event)
else:
logging.warn('poll removed fd')
now = time.time()
if now - self._last_time > TIMEOUT_PRECISION:
self._sweep_timeout()
self._last_time = now
def _receive_data(self, task):
self._active_task(task)
_socket = task.task_info["socket"]
data = None
try:
data = _socket.recv(self.conf["buf_size"])
logger.debug("Receive\n%s" % data)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
else:
self._remove_task(task, why="Receive err")
if not data:
func = task.task_info["callback"]
try:
func(task)
except:
self._remove_task(task, why="Call back err")
return
else:
logger.debug("Finish remove task")
self._remove_task(task) # Finish
return
task.task_info["recv_buf"] += data
def _send_data(self, task):
self._active_task(task)
_socket = task.task_info["socket"]
send_buf = task.task_info["send_buf"]
if not send_buf or not _socket:
return True
uncomplete = False
try:
s = _socket.send(send_buf)
if s < len(send_buf):
task.task_info["send_buf"] = send_buf[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
uncomplete = True
else:
logger.error(e)
if self.conf['verbose']:
import traceback
traceback.print_exc()
self._remove_task(task, why="Send error")
return False
if uncomplete:
event = eventloop.POLL_ERR | eventloop.POLL_OUT
self.eventloop.modify(_socket, event)
else:
task.task_info["send_buf"] = ""
event = eventloop.POLL_ERR | eventloop.POLL_IN
self.eventloop.modify(_socket, event)
return True
def _on_remote_read(self):
# handle all remote read events
data = None
try:
data = self._remote_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
self._update_activity(len(data))
# 注意，往local发送的数据不经过ota
if self._is_local:
# 服务器的数据经过加密，客户端进行解密
data = self._encryptor.decrypt(data)
else:
# 收到web的数据，服务器加密之后才能发给客户端
data = self._encryptor.encrypt(data)
try:
# 立即就写?写失败也不放到data_write_to_local吗
self._write_to_sock(data, self._local_sock)
except Exception as e:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def _handle_events(self, events):
for sock, fd, event in events:
if sock:
logging.info('fd %d %s', fd,
eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
if event & eventloop.EPOLL_ERR:
# TODO
raise Exception('server_socket error')
try:
client_sock, address = self._server_socket.accept()
logging.info('accept client from %s', address)
UserOnServer(self, self._fd_to_users, self._userid_login_status,
self._userid_to_fd, self._eventloop, client_sock)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS):
continue
else:
logging.error(e)
traceback.print_exc()
else:
if sock:
user = self._fd_to_users.get(fd, None)
if user:
user.handle_event(sock, event)
else:
logging.warn('poll removed fd')
def write_to_sock(self, data, sock):
if not data or not sock:
return
uncomplete = False
try:
l = len(data)
s = sock.send(data)
if s < l:
data = data[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS):
uncomplete = True
else:
logging.error(e)
self.destroy()
if uncomplete:
if sock == self._local_sock:
self._data_to_write_to_local.append(data)
self.update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
elif sock == self._remote_sock:
self._data_to_write_to_remote.append(data)
self.update_stream(STREAM_UP, WAIT_STATUS_WRITING)
else:
logging.error('write_all_to_sock:unknown socket')
else:
if sock == self._local_sock:
self.update_stream(STREAM_DOWN, WAIT_STATUS_READING)
elif sock == self._remote_sock:
self.update_stream(STREAM_UP, WAIT_STATUS_READING)
else:
logging.error('write_all_to_sock:unknown socket')
def _run(self):
server_socket = self._server_socket
self._eventloop.add(server_socket, eventloop.POLL_IN)
last_time = time.time()
while True:
try:
events = self._eventloop.poll(10)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EPIPE:
# Happens when the client closes the connection
continue
else:
logging.error(e)
continue
for sock, event in events:
if sock == self._server_socket:
self._handle_server()
else:
self._handle_client(sock)
now = time.time()
if now - last_time > 3.5:
self._cache.sweep()
if now - last_time > 7:
self._client_fd_to_server_addr.sweep()
last_time = now
def _handle_events(self, events):
for sock, fd, event in events:
if sock:
logging.debug('fd %d %s', fd,
eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
if event & eventloop.POLL_ERR:
# TODO
raise Exception('server_socket error')
try:
# logging.debug('accept')
conn = self._server_socket.accept()
TCPRelayHandler(self, self._fd_to_handlers, self._eventloop,
conn[0], self._config, self._is_local)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS):
continue
else:
logging.error(e)
traceback.print_exc()
else:
if sock:
handler = self._fd_to_handlers.get(fd, None)
if handler:
handler.handle_event(sock, event)
else:
logging.warn('poll removed fd')
now = time.time()
if now - self._last_time > TIMEOUT_PRECISION:
self._sweep_timeout()
self._last_time = now
def _on_remote_read(self):
# handle all remote read events
data = None
if self._is_local:
buf_size = UP_STREAM_BUF_SIZE
else:
buf_size = DOWN_STREAM_BUF_SIZE
try:
data = self._remote_sock.recv(buf_size)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
self._update_activity(len(data))
if self._is_local:
data = self._cryptor.decrypt(data)
else:
data = self._cryptor.encrypt(data)
try:
self._write_to_sock(data, self._local_sock)
except Exception as e:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def _on_local_read(self):
self._update_activity()
if not self._local_sock:
return
is_local = self._is_local
data = None
try:
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
self._server.server_transfer_ul += len(data)
if not is_local:
data = self._encryptor.decrypt(data)
if not data:
return
if self._stage == STAGE_STREAM:
if self._is_local:
data = self._encryptor.encrypt(data)
self._write_to_sock(data, self._remote_sock)
return
elif is_local and self._stage == STAGE_INIT:
# TODO check auth method
self._write_to_sock('\x05\00', self._local_sock)
self._stage = STAGE_HELLO
return
elif self._stage == STAGE_REPLY:
self._handle_stage_reply(data)
elif (is_local and self._stage == STAGE_HELLO) or \
(not is_local and self._stage == STAGE_INIT):
self._handle_stage_hello(data)
def callback(self, address, err):
if address:
ip = address[1]
addrs = socket.getaddrinfo(ip, self.port, 0, socket.SOCK_STREAM,
socket.SOL_TCP)
if len(addrs) == 0:
raise Exception("getaddrinfo failed for %s:%d" %
(addrs[1], self.port))
print addrs
af, socktype, proto, canonname, sa = addrs[0]
remote_sock = socket.socket(af, socktype, proto)
remote_sock.setblocking(False)
remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
self.sock = remote_sock
try:
self.sock.connect((ip, self.port))
except (OSError, IOError) as e:
traceback.print_exc()
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self.sock.sendall(self.data)
eventloop.SockManage.add(self,
eventloop.POLL_ERR | eventloop.POLL_OUT)
pass
def handle_event(self, sock, fd, event):
# handle events and dispatch to handlers
if sock:
logging.log(shell.VERBOSE_LEVEL, 'fd %d %s', fd,
eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
# 服务器socket接收连接
if event & eventloop.POLL_ERR:
# TODO
raise Exception('server_socket error')
try:
logging.debug('accept')
conn = self._server_socket.accept()
TCPRelayHandler(self, self._fd_to_handlers, self._eventloop,
conn[0], self._config, self._dns_resolver,
self._is_local)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
return
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
else:
# 其他socket，可能是与客户端的，也可能是web的(相对ssserver)
if sock:
# 回调之
handler = self._fd_to_handlers.get(fd, None)
if handler:
handler.handle_event(sock, event)
else:
logging.warn('poll removed fd')
def _run(self):
server_socket = self._server_socket
self._eventloop = eventloop.EventLoop()
self._eventloop.add(server_socket, eventloop.POLL_IN)
last_time = time.time()
while not self._closed:
try:
events = self._eventloop.poll(10)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EPIPE:
# Happens when the client closes the connection
continue
else:
logging.error(e)
continue
for sock, event in events:
if sock == self._server_socket:
self._handle_server()
else:
self._handle_client(sock)
now = time.time()
if now - last_time > 3.5:
self._cache.sweep()
if now - last_time > 7:
self._client_fd_to_server_addr.sweep()
last_time = now
def _on_remote_read(self):
self._update_activity()
data = None
try:
data = self._remote_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
self._server.server_transfer_dl += len(data)
if self._is_local:
data = self._encryptor.decrypt(data)
else:
data = self._encryptor.encrypt(data)
try:
self._write_to_sock(data, self._local_sock)
except Exception as e:
logging.error(e)
if self._config['verbose']:
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def handle_tcp(sock, remote, encryptor, pending_data=None,
server=None, port=None):
connected = False
try:
if config_fast_open:
fdset = [sock]
else:
fdset = [sock, remote]
while True:
should_break = False
r, w, e = select.select(fdset, [], [], config_timeout)
if not r:
logging.warn('read time out')
break
if sock in r:
if not connected and config_fast_open:
data = sock.recv(4096)
data = encryptor.encrypt(pending_data + data)
pending_data = None
logging.info('fast open %s:%d' % (server, port))
try:
remote.sendto(data, MSG_FASTOPEN, (server, port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
pass
else:
raise e
connected = True
fdset = [sock, remote]
else:
data = sock.recv(4096)
if pending_data:
data = pending_data + data
pending_data = None
data = encryptor.encrypt(data)
if len(data) <= 0:
should_break = True
else:
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
if remote in r:
data = encryptor.decrypt(remote.recv(4096))
if len(data) <= 0:
should_break = True
else:
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
if should_break:
# make sure all data are read before we close the sockets
# TODO: we haven't read ALL the data, actually
# http://cs.ecs.baylor.edu/~donahoo/practical/CSockets/TCPRST.pdf
break
finally:
sock.close()
remote.close()
def _handle_server(self):
server = self._server_socket
data, r_addr = server.recvfrom(BUF_SIZE)
if self._is_local:
frag = ord(data[2])
if frag != 0:
logging.warn('drop a message since frag is not 0')
return
else:
data = data[3:]
else:
# decrypt data
data = encrypt.encrypt_all(self._password, self._method, 0, data)
if not data:
return
header_result = parse_header(data)
if header_result is None:
return
addrtype, dest_addr, dest_port, header_length = header_result
if self._is_local:
server_addr, server_port = self._remote_addr, self._remote_port
else:
server_addr, server_port = dest_addr, dest_port
key = client_key(r_addr[0], r_addr[1], dest_addr, dest_port)
client = self._cache.get(key, None)
if not client:
# TODO async getaddrinfo
addrs = socket.getaddrinfo(server_addr, server_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if addrs:
af, socktype, proto, canonname, sa = addrs[0]
client = socket.socket(af, socktype, proto)
client.setblocking(False)
self._cache[key] = client
self._client_fd_to_server_addr[client.fileno()] = r_addr
else:
# drop
return
self._sockets.add(client.fileno())
self._eventloop.add(client, eventloop.POLL_IN)
data = data[header_length:]
if not data:
return
if self._is_local:
data = encrypt.encrypt_all(self._password, self._method, 1, data)
if not data:
return
try:
client.sendto(data, (server_addr, server_port))
except IOError as e:
err = eventloop.errno_from_exception(e)
if err in (errno.EINPROGRESS, errno.EAGAIN):
pass
else:
logging.error(e)
def _handle_stage_connecting(self, data):
if not self._is_local:
if self._ota_enable_session:
self._ota_chunk_data(data,
self._data_to_write_to_remote.append)
else:
self._data_to_write_to_remote.append(data)
return
if self._ota_enable_session:
data = self._ota_chunk_data_gen(data)
data = self._cryptor.encrypt(data)
self._data_to_write_to_remote.append(data)
if self._config['fast_open'] and not self._fastopen_connected:
# for sslocal and fastopen, we basically wait for data and use
# sendto to connect
try:
# only connect once
self._fastopen_connected = True
remote_sock = \
self._create_remote_socket(self._chosen_server[0],
self._chosen_server[1])
self._loop.add(remote_sock, eventloop.POLL_ERR, self._server)
data = b''.join(self._data_to_write_to_remote)
l = len(data)
s = remote_sock.sendto(data, MSG_FASTOPEN, self._chosen_server)
if s < l:
data = data[s:]
self._data_to_write_to_remote = [data]
else:
self._data_to_write_to_remote = []
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
# in this case data is not sent at all
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
elif eventloop.errno_from_exception(e) == errno.ENOTCONN:
logging.error('fast open not supported on this OS')
self._config['fast_open'] = False
self.destroy()
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _handle_dns_resolved(self, result, error):
if error:
logging.error(error)
self.destroy()
return
if result:
ip = result[1]
if ip:
try:
self._stage = STAGE_REPLY
remote_addr = self._remote_address[0]
remote_port = self._remote_address[1]
if self._is_local:
remote_addr, remote_port = self._chosen_server
addrs = socket.getaddrinfo(ip, remote_port, 0,
socket.SOCK_STREAM,
socket.SOL_TCP)
if len(addrs) == 0:
raise Exception("getaddrinfo failed for %s:%d" %
(remote_addr, remote_port))
af, socktype, proto, canonname, sa = addrs[0]
remote_sock = socket.socket(af, socktype, proto)
self._remote_sock = remote_sock
self._fd_to_handlers[remote_sock.fileno()] = self
remote_sock.setblocking(False)
remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY,
1)
if self._is_local and self._config['fast_open']:
# wait for more data to arrive and send them in one SYN
self._stage = STAGE_REPLY
self._loop.add(remote_sock, eventloop.POLL_ERR)
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
try:
remote_sock.connect(sa)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except (OSError, IOError) as e:
logging.error(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def handle_tcp(sock,
remote,
encryptor,
pending_data=None,
server=None,
port=None):
connected = False
try:
if config_fast_open:
fdset = [sock]
else:
fdset = [sock, remote]
while True:
r, w, e = select.select(fdset, [], [])
if sock in r:
if not connected and config_fast_open:
data = sock.recv(4096)
data = encryptor.encrypt(pending_data + data)
pending_data = None
logging.info('fast open %s:%d' % (server, port))
try:
remote.sendto(data, MSG_FASTOPEN, (server, port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(
e) == errno.EINPROGRESS:
pass
else:
raise e
connected = True
fdset = [sock, remote]
else:
data = sock.recv(4096)
if pending_data:
data = pending_data + data
pending_data = None
data = encryptor.encrypt(data)
if len(data) <= 0:
break
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
if remote in r:
data = encryptor.decrypt(remote.recv(4096))
if len(data) <= 0:
break
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
finally:
sock.close()
remote.close()
def _handle_dns_resolved(self, result, error):
if error:
logging.error(error)
self.destroy()
return
if result:
ip = result[1]
if ip:
try:
self._stage = STAGE_REPLY
remote_addr = self._remote_address[0]
remote_port = self._remote_address[1]
if self._is_local:
remote_addr, remote_port = self._chosen_server
addrs = socket.getaddrinfo(ip, remote_port, 0,
socket.SOCK_STREAM,
socket.SOL_TCP)
if len(addrs) == 0:
raise Exception("getaddrinfo failed for %s:%d" %
(remote_addr, remote_port))
af, socktype, proto, canonname, sa = addrs[0]
remote_sock = socket.socket(af, socktype, proto)
self._remote_sock = remote_sock
self._fd_to_handlers[remote_sock.fileno()] = self
remote_sock.setblocking(False)
remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY,
1)
if self._is_local and self._config['fast_open']:
# wait for more data to arrive and send them in one SYN
self._stage = STAGE_REPLY
self._loop.add(remote_sock, eventloop.POLL_ERR)
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
try:
remote_sock.connect(sa)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except (OSError, IOError) as e:
logging.error(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _send_control_data(self, data):
if self._control_client_addr:
try:
self._control_socket.sendto(data, self._control_client_addr)
except (socket.error, OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
return
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
def _handle_dns_resolved(self, result, error):
# 解析成功，remote_sock连接远端，开始收发数据
# 状态变为STAGE_CONNECTING
if error:
self._log_error(error)
self.destroy()
return
if result and result[1]:
ip = result[1]
try:
self._stage = STAGE_CONNECTING
remote_addr = ip
if self._is_local:
# sslocal得到ssserver的端口
remote_port = self._chosen_server[1]
else:
# 服务器得到远程端要连接的端口
remote_port = self._remote_address[1]
if self._is_local and self._config['fast_open']:
# for fastopen:
# wait for more data arrive and send them in one SYN
self._stage = STAGE_CONNECTING
# we don't have to wait for remote since it's not
# created
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
# else do connect
# 服务器创建连接远程的socket
remote_sock = self._create_remote_socket(
remote_addr, remote_port)
try:
remote_sock.connect((remote_addr, remote_port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT,
self._server)
self._stage = STAGE_CONNECTING
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except Exception as e:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _handle_stage_connecting(self, data):
if self._is_local:
data = self._encryptor.encrypt(data)
self._data_to_write_to_remote.append(data)
if self._is_local and not self._fastopen_connected and \
self._config['fast_open']:
# for sslocal and fastopen, we basically wait for data and use
# sendto to connect
try:
# only connect once
self._fastopen_connected = True
remote_sock = \
self._create_remote_socket(self._chosen_server[0],
self._chosen_server[1])
self._loop.add(remote_sock, eventloop.POLL_ERR)
data = b''.join(self._data_to_write_to_remote)
l = len(data)
s = remote_sock.sendto(data, MSG_FASTOPEN, self._chosen_server)
if s < l:
data = data[s:]
self._data_to_write_to_remote = [data]
else:
self._data_to_write_to_remote = []
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
# in this case data is not sent at all
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
elif eventloop.errno_from_exception(e) == errno.ENOTCONN:
logging.error('fast open not supported on this OS')
self._config['fast_open'] = False
self.destroy()
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _on_local_read(self):
data = None
try:
data = self.sock.recv(BUF_SIZE)
print data
self.data.append(data)
context = "".join(self.data)
if not data and context.strip():
RemoteSockHandler(context, self)
self.destroy()
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
self.destroy()
def _on_remote_write(self):
data = None
try:
data = self.sock.recv(BUF_SIZE)
print data
if data:
self.local_sock_handler.sock.send(data)
if not data:
self.destroy()
pass
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
self.destroy()
pass
def handle_tcp(sock, remote, encryptor, pending_data=None,
server=None, port=None):
connected = False
try:
if config_fast_open:
fdset = [sock]
else:
fdset = [sock, remote]
while True:
r, w, e = select.select(fdset, [], [])
if sock in r:
if not connected and config_fast_open:
data = sock.recv(4096)
data = encryptor.encrypt(pending_data + data)
pending_data = None
logging.info('fast open %s:%d' % (server, port))
try:
remote.sendto(data, MSG_FASTOPEN, (server, port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
pass
else:
raise e
connected = True
fdset = [sock, remote]
else:
data = sock.recv(4096)
if pending_data:
data = pending_data + data
pending_data = None
data = encryptor.encrypt(data)
if len(data) <= 0:
break
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
if remote in r:
data = encryptor.decrypt(remote.recv(4096))
if len(data) <= 0:
break
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
finally:
sock.close()
remote.close()
def _handle_dns_resolved(self, result, error):
if error:
self._log_error(error)
self.destroy()
return
if result:
ip = result[1]
if ip:
try:
self._stage = STAGE_CONNECTING
remote_addr = ip
if self._is_local:
remote_port = self._chosen_server[1]
else:
remote_port = self._remote_address[1]
if self._is_local and self._config['fast_open']:
# for fastopen:
# wait for more data to arrive and send them in one SYN
self._stage = STAGE_CONNECTING
# we don't have to wait for remote since it's not
# created
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
# else do connect
remote_sock = self._create_remote_socket(remote_addr,
remote_port)
try:
remote_sock.connect((remote_addr, remote_port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_CONNECTING
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except Exception as e:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _handle_events(self, events):
# handle events and dispatch to handlers
for sock, fd, event in events:
if sock:
logging.log(shell.VERBOSE_LEVEL, 'fd %d %s', fd,
eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
if event & eventloop.POLL_ERR:
# TODO
raise Exception('server_socket error')
try:
logging.debug('accept')
conn = self._server_socket.accept()
TCPRelayHandler(self, self._fd_to_handlers,
self._eventloop, conn[0], self._config,
self._dns_resolver, self._is_local)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
continue
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
else:
if sock:
handler = self._fd_to_handlers.get(fd, None)
if handler:
handler.handle_event(sock, event)
else:
logging.warn('poll removed fd')
now = time.time()
if now - self._last_time > TIMEOUT_PRECISION:
self._sweep_timeout()
self._last_time = now
if self._closed:
if self._server_socket:
self._eventloop.remove(self._server_socket)
self._server_socket.close()
self._server_socket = None
logging.info('closed listen port %d', self._listen_port)
if not self._fd_to_handlers:
self._eventloop.remove_handler(self._handle_events)
def _handle_events(self, events):
# handle events and dispatch to handlers
for sock, fd, event in events:
if sock:
logging.log(shell.VERBOSE_LEVEL, 'fd %d %s', fd,
eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
if event & eventloop.POLL_ERR:
# TODO
raise Exception('server_socket error')
try:
logging.debug('accept')
conn = self._server_socket.accept()
TCPRelayHandler(self, self._fd_to_handlers,
self._eventloop, conn[0], self._config,
self._dns_resolver, self._is_local)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
continue
else:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
else:
if sock:
handler = self._fd_to_handlers.get(fd, None)
if handler:
handler.handle_event(sock, event)
else:
logging.warn('poll removed fd')
now = time.time()
if now - self._last_time > TIMEOUT_PRECISION:
self._sweep_timeout()
self._last_time = now
if self._closed:
if self._server_socket:
self._eventloop.remove(self._server_socket)
self._server_socket.close()
self._server_socket = None
logging.info('closed listen port %d', self._listen_port)
if not self._fd_to_handlers:
def _handle_dns_resolved(self, result, error):
if error:
addr, port = self._client_address[0], self._client_address[1]
logging.error('%s when handling connection from %s:%d' %
(error, addr, port))
self.destroy()
return
if not (result and result[1]):
self.destroy()
return
ip = result[1]
self._stage = STAGE_CONNECTING
remote_addr = ip
if self._is_local:
remote_port = self._chosen_server[1]
else:
remote_port = self._remote_address[1]
if self._is_local and self._config['fast_open']:
# for fastopen:
# wait for more data arrive and send them in one SYN
self._stage = STAGE_CONNECTING
# we don't have to wait for remote since it's not
# created
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
# else do connect
remote_sock = self._create_remote_socket(remote_addr, remote_port)
try:
remote_sock.connect((remote_addr, remote_port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT,
self._server)
self._stage = STAGE_CONNECTING
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
def write_to_server_socket(self, data, addr):
uncomplete = False
retry = 0
try:
self._server_socket.sendto(data, addr)
data = None
while self._data_to_write_to_server_socket:
data_buf = self._data_to_write_to_server_socket[0]
retry = data_buf[1] + 1
del self._data_to_write_to_server_socket[0]
data, addr = data_buf[0]
self._server_socket.sendto(data, addr)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
uncomplete = True
if error_no in (errno.EWOULDBLOCK, ):
pass
else:
logging.error(e)
return False
def _handle_dns_resolved(self, result, error):
if error:
self._log_error(error)
self.destroy()
return
if result:
ip = result[1]
if ip:
try:
self._stage = STAGE_REPLY
remote_addr = ip
if self._is_local:
remote_port = self._chosen_server[1]
else:
remote_port = self._remote_address[1]
if self._is_local and self._config['fast_open']:
# wait for more data to arrive and send them in one SYN
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
remote_sock = self._create_remote_socket(remote_addr,
remote_port)
try:
remote_sock.connect((remote_addr, remote_port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == \
errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except (OSError, IOError) as e:
logging.error(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _write_to_sock(self, data, sock):
# write data to sock
# if only some of the data are written, put remaining in the buffer
# and update the stream to wait for writing
if not data or not sock:
return False
uncomplete = False
try:
l = len(data)
s = sock.send(data)
if s < l:
data = data[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
uncomplete = True
else:
shell.print_exception(e)
self.destroy()
return False
if uncomplete:
# 还有数据未写完，继续写
if sock == self._local_sock:
self._data_to_write_to_local.append(data)
self._update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
elif sock == self._remote_sock:
self._data_to_write_to_remote.append(data)
self._update_stream(STREAM_UP, WAIT_STATUS_WRITING)
else:
logging.error('write_all_to_sock:unknown socket')
else:
# 写完之后读
if sock == self._local_sock:
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
elif sock == self._remote_sock:
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
else:
logging.error('write_all_to_sock:unknown socket')
return True
def _handle_events(self, events):
for sock, fd, event in events:
if sock:
logging.log(utils.VERBOSE_LEVEL, "fd %d %s", fd, eventloop.EVENT_NAMES.get(event, event))
if sock == self._server_socket:
if event & eventloop.POLL_ERR:
# TODO
raise Exception("server_socket error")
try:
logging.debug("accept")
conn = self._server_socket.accept()
TCPRelayHandler(
self,
self._fd_to_handlers,
self._eventloop,
conn[0],
self._config,
self._dns_resolver,
self._is_local,
)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS, errno.EWOULDBLOCK):
continue
else:
logging.error(e)
if self._config["verbose"]:
traceback.print_exc()
else:
if sock:
handler = self._fd_to_handlers.get(fd, None)
if handler:
handler.handle_event(sock, event)
else:
logging.warn("poll removed fd")
now = time.time()
if now - self._last_time > TIMEOUT_PRECISION:
self._sweep_timeout()
self._last_time = now
def _on_local_read(self):
# handle all local read events and dispatch them to methods for
# each stage
if not self._local_sock:
return
is_local = self._is_local
data = None
if is_local:
buf_size = UP_STREAM_BUF_SIZE
else:
buf_size = DOWN_STREAM_BUF_SIZE
try:
data = self._local_sock.recv(buf_size)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
self._update_activity(len(data))
if not is_local:
data = self._cryptor.decrypt(data)
if not data:
return
if self._stage == STAGE_STREAM:
self._handle_stage_stream(data)
return
elif is_local and self._stage == STAGE_INIT:
# jump over socks5 init
if self._is_tunnel:
self._handle_stage_addr(data)
return
else:
self._handle_stage_init(data)
elif self._stage == STAGE_CONNECTING:
self._handle_stage_connecting(data)
elif (is_local and self._stage == STAGE_ADDR) or \
(not is_local and self._stage == STAGE_INIT):
self._handle_stage_addr(data)
def handle_event(self, sock, fd, event):
if sock:
print 'handle fd %d %s' % (fd,
eventloop.EVENT_NAMES.get(event, event))
# (bt) new connection trigger server_socket
if sock == self._server_socket:
if event & eventloop.POLL_ERR:
raise Exception('server_socket error')
try:
logging.debug('accept')
conn = self._server_socket.accept()
conn_sock = conn[0]
conn_sock.setblocking(False)
conn_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
# (bt) self is the handler
loop = self._eventloop
loop.add(conn_sock, eventloop.POLL_IN | eventloop.POLL_ERR,
self)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
return
else:
print("%s" % str(e))
else:
if sock:
data = None
try:
data = sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
return
if not data:
return
print "reveived: %s" % data
sock.send("hello, world")
self.close_connection(sock)
else:
logging.warn('poll removed fd')
def _write_to_sock(self, data, sock):
# write data to sock
# if only some of the data are written, put remaining in the buffer
# and update the stream to wait for writing
if not data or not sock:
return False
uncomplete = False
try:
l = len(data)
s = sock.send(data)
if s < l:
data = data[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
uncomplete = True
else:
shell.print_exception(e)
self.destroy()
return False
if uncomplete:
if sock == self._local_sock:
self._data_to_write_to_local.append(data)
self._update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
elif sock == self._remote_sock:
self._data_to_write_to_remote.append(data)
self._update_stream(STREAM_UP, WAIT_STATUS_WRITING)
else:
logging.error('write_all_to_sock:unknown socket')
else:
if sock == self._local_sock:
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
elif sock == self._remote_sock:
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
else:
logging.error('write_all_to_sock:unknown socket')
return True
def _on_local_read(self):
# handle all local read events and dispatch them to methods for
# each stage
if not self._local_sock:
return
is_local = self._is_local
data = None
try:
# socket读取数据
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
# socket关闭
self.destroy()
return
# 更新活动时间哟，不然server以为超时会被close的
self._update_activity(len(data))
if not is_local:
# 服务器端的，解密呀
data = self._encryptor.decrypt(data)
if not data:
return
if self._stage == STAGE_STREAM:
self._handle_stage_stream(data)
return
elif is_local and self._stage == STAGE_INIT:
# sslocal客户端的初始socket
self._handle_stage_init(data)
elif self._stage == STAGE_CONNECTING:
# 已经建立好连接，从一端收到数据发送到另外一端
self._handle_stage_connecting(data)
elif (is_local and self._stage == STAGE_ADDR) or \
(not is_local and self._stage == STAGE_INIT):
# 服务器收到连，建立通信，或者客户端STAGE_ADDR
self._handle_stage_addr(data)
def _handle_dns_resolved(self, result, error):
if error:
logging.error(error)
self.destroy()
return
if result:
ip = result[1]
if ip:
try:
self._stage = STAGE_REPLY
remote_addr = ip
if self._is_local:
remote_port = self._chosen_server[1]
else:
remote_port = self._remote_address[1]
if self._is_local and self._config["fast_open"]:
# wait for more data to arrive and send them in one SYN
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
# TODO when there is already data in this packet
else:
remote_sock = self._create_remote_socket(remote_addr, remote_port)
try:
remote_sock.connect((remote_addr, remote_port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
pass
self._loop.add(remote_sock, eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except (OSError, IOError) as e:
logging.error(e)
if self._config["verbose"]:
traceback.print_exc()
self.destroy()
def on_remote_read(self):
self.update_activity()
data = None
try:
data = self._remote_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN):
return
if not data:
self.destroy()
return
if self._is_local:
data = self._encryptor.decrypt(data)
else:
data = self._encryptor.encrypt(data)
try:
self.write_to_sock(data, self._local_sock)
except Exception:
import traceback
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def _on_remote_read(self):
self._update_activity()
data = None
try:
data = self._remote_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN):
return
if not data:
self.destroy()
return
if self._is_local:
data = self._encryptor.decrypt(data)
else:
data = self._encryptor.encrypt(data)
try:
self._write_to_sock(data, self._local_sock)
except Exception:
import traceback
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def _on_local_read(self):
# handle all local read events and dispatch them to methods for
# each stage
self._update_activity()
if not self._local_sock:
return
is_local = self._is_local
data = None
try:
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
self._server.server_transfer_ul += len(data)
if not is_local:
data = self._encryptor.decrypt(data)
if not data:
return
if self._stage == STAGE_STREAM:
if self._is_local:
data = self._encryptor.encrypt(data)
self._write_to_sock(data, self._remote_sock)
return
elif is_local and self._stage == STAGE_INIT:
# TODO check auth method
self._write_to_sock(b'\x05\00', self._local_sock)
self._stage = STAGE_ADDR
return
elif self._stage == STAGE_CONNECTING:
self._handle_stage_connecting(data)
elif (is_local and self._stage == STAGE_ADDR) or \
(not is_local and self._stage == STAGE_INIT):
self._handle_stage_addr(data)
def _write_to_sock(self, data, sock):
if not data or not sock:
return False
uncomplete = False
try:
l = len(data)
s = sock.send(data)
if s < l:
data = data[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS, errno.EWOULDBLOCK):
uncomplete = True
else:
logging.error(e)
if self._config["verbose"]:
traceback.print_exc()
self.destroy()
return False
if uncomplete:
if sock == self._local_sock:
self._data_to_write_to_local.append(data)
self._update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
elif sock == self._remote_sock:
self._data_to_write_to_remote.append(data)
self._update_stream(STREAM_UP, WAIT_STATUS_WRITING)
else:
logging.error("write_all_to_sock:unknown socket")
else:
if sock == self._local_sock:
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
elif sock == self._remote_sock:
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
else:
logging.error("write_all_to_sock:unknown socket")
return True
def on_local_read(self):
self.update_activity()
if not self._local_sock:
return
is_local = self._is_local
data = None
try:
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN):
return
if not data:
self.destroy()
return
if not is_local:
data = self._encryptor.decrypt(data)
if not data:
return
if self._stage == STAGE_STREAM:
if self._is_local:
data = self._encryptor.encrypt(data)
self.write_to_sock(data, self._remote_sock)
return
elif is_local and self._stage == STAGE_INIT:
# TODO check auth method
self.write_to_sock('\x05\00', self._local_sock)
self._stage = STAGE_HELLO
return
elif self._stage == STAGE_REPLY:
if is_local:
data = self._encryptor.encrypt(data)
self._data_to_write_to_remote.append(data)
elif (is_local and self._stage == STAGE_HELLO) or \
(not is_local and self._stage == STAGE_INIT):
try:
if is_local:
cmd = ord(data[1])
if cmd == CMD_UDP_ASSOCIATE:
logging.debug('UDP associate')
if self._local_sock.family == socket.AF_INET6:
header = '\x05\x00\x00\x04'
else:
header = '\x05\x00\x00\x01'
addr, port = self._local_sock.getsockname()
addr_to_send = socket.inet_pton(self._local_sock.family,
addr)
port_to_send = struct.pack('>H', port)
self.write_to_sock(header + addr_to_send + port_to_send,
self._local_sock)
self._stage = STAGE_UDP_ASSOC
# just wait for the client to disconnect
return
elif cmd == CMD_CONNECT:
# just trim VER CMD RSV
data = data[3:]
else:
logging.error('unknown command %d', cmd)
self.destroy()
return
header_result = parse_header(data)
if header_result is None:
raise Exception('can not parse header')
addrtype, remote_addr, remote_port, header_length =\
header_result
logging.info('connecting %s:%d' % (remote_addr, remote_port))
self._remote_address = (remote_addr, remote_port)
if is_local:
# forward address to remote
self.write_to_sock('\x05\x00\x00\x01' +
'\x00\x00\x00\x00\x10\x10',
self._local_sock)
data_to_send = self._encryptor.encrypt(data)
self._data_to_write_to_remote.append(data_to_send)
remote_addr = self._config['server']
remote_port = self._config['server_port']
else:
if len(data) > header_length:
self._data_to_write_to_remote.append(
data[header_length:])
# TODO async DNS
addrs = socket.getaddrinfo(remote_addr, remote_port, 0,
socket.SOCK_STREAM, socket.SOL_TCP)
if len(addrs) == 0:
raise Exception("can't get addrinfo for %s:%d" %
(remote_addr, remote_port))
af, socktype, proto, canonname, sa = addrs[0]
remote_sock = socket.socket(af, socktype, proto)
self._remote_sock = remote_sock
self._fd_to_handlers[remote_sock.fileno()] = self
remote_sock.setblocking(False)
remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
# TODO support TCP fast open
try:
remote_sock.connect(sa)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_REPLY
self.update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self.update_stream(STREAM_DOWN, WAIT_STATUS_READING)
return
except Exception:
import traceback
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def _handle_server(self):
server = self._server_socket
data, r_addr = server.recvfrom(BUF_SIZE)
if not data:
logging.debug('UDP handle_server: data is empty')
if self._is_local:
frag = common.ord(data[2])
if frag != 0:
logging.warn('drop a message since frag is not 0')
return
else:
data = data[3:]
else:
data = encrypt.encrypt_all(self._password, self._method, 0, data)
# decrypt data
if not data:
logging.debug('UDP handle_server: data is empty after decrypt')
return
header_result = parse_header(data)
if header_result is None:
return
addrtype, dest_addr, dest_port, header_length = header_result
if self._is_local:
server_addr, server_port = self._get_a_server()
else:
server_addr, server_port = dest_addr, dest_port
addrs = self._dns_cache.get(server_addr, None)
if addrs is None:
addrs = socket.getaddrinfo(server_addr, server_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if not addrs:
# drop
return
else:
self._dns_cache[server_addr] = addrs
af, socktype, proto, canonname, sa = addrs[0]
key = client_key(r_addr, af)
logging.debug(key)
client = self._cache.get(key, None)
if not client:
# TODO async getaddrinfo
if self._forbidden_iplist:
if common.to_str(sa[0]) in self._forbidden_iplist:
logging.debug('IP %s is in forbidden list, drop' %
common.to_str(sa[0]))
# drop
return
client = socket.socket(af, socktype, proto)
client.setblocking(False)
self._cache[key] = client
self._client_fd_to_server_addr[client.fileno()] = r_addr
self._sockets.add(client.fileno())
self._eventloop.add(client, eventloop.POLL_IN)
if self._is_local:
data = encrypt.encrypt_all(self._password, self._method, 1, data)
if not data:
return
else:
data = data[header_length:]
if not data:
return
try:
client.sendto(data, (server_addr, server_port))
except IOError as e:
err = eventloop.errno_from_exception(e)
if err in (errno.EINPROGRESS, errno.EAGAIN):
pass
else:
shell.print_exception(e)
def _handle_stage_hello(self, data):
try:
if self._is_local:
cmd = ord(data[1])
if cmd == CMD_UDP_ASSOCIATE:
logging.debug('UDP associate')
if self._local_sock.family == socket.AF_INET6:
header = '\x05\x00\x00\x04'
else:
header = '\x05\x00\x00\x01'
addr, port = self._local_sock.getsockname()
addr_to_send = socket.inet_pton(self._local_sock.family,
addr)
port_to_send = struct.pack('>H', port)
self._write_to_sock(header + addr_to_send + port_to_send,
self._local_sock)
self._stage = STAGE_UDP_ASSOC
# just wait for the client to disconnect
return
elif cmd == CMD_CONNECT:
# just trim VER CMD RSV
data = data[3:]
else:
logging.error('unknown command %d', cmd)
self.destroy()
return
header_result = parse_header(data)
if header_result is None:
raise Exception('can not parse header')
addrtype, remote_addr, remote_port, header_length = header_result
logging.info('connecting %s:%d' % (remote_addr, remote_port))
self._remote_address = (remote_addr, remote_port)
if self._is_local:
# forward address to remote
self._write_to_sock('\x05\x00\x00\x01\x00\x00\x00\x00\x10\x10',
self._local_sock)
data_to_send = self._encryptor.encrypt(data)
self._data_to_write_to_remote.append(data_to_send)
remote_addr = self._config['server']
remote_port = self._config['server_port']
else:
if len(data) > header_length:
self._data_to_write_to_remote.append(data[header_length:])
# TODO async DNS
addrs = socket.getaddrinfo(remote_addr, remote_port, 0,
socket.SOCK_STREAM, socket.SOL_TCP)
if len(addrs) == 0:
raise Exception("can't get addrinfo for %s:%d" %
(remote_addr, remote_port))
af, socktype, proto, canonname, sa = addrs[0]
remote_sock = socket.socket(af, socktype, proto)
self._remote_sock = remote_sock
self._fd_to_handlers[remote_sock.fileno()] = self
remote_sock.setblocking(False)
remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
if self._is_local and self._config['fast_open']:
# wait for more data to arrive and send them in one SYN
self._stage = STAGE_REPLY
self._loop.add(remote_sock, eventloop.POLL_ERR)
# TODO when there is already data in this packet
else:
try:
remote_sock.connect(sa)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
pass
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT)
self._stage = STAGE_REPLY
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
except Exception as e:
logging.error(e)
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
