add manyuser branch

support udp over tcp
support chacha20 & salsa20 (base on libsodium)

asyncmgr.py

@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2014 clowwindy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import time
+import os
+import socket
+import struct
+import re
+import logging
+from shadowsocks import common
+from shadowsocks import lru_cache
+from shadowsocks import eventloop
+import server_pool
+import Config
+
+class ServerMgr(object):
+
+    def __init__(self):
+        self._loop = None
+        self._request_id = 1
+        self._hosts = {}
+        self._hostname_status = {}
+        self._hostname_to_cb = {}
+        self._cb_to_hostname = {}
+        self._last_time = time.time()
+        self._sock = None
+        self._servers = None
+
+    def add_to_loop(self, loop):
+        if self._loop:
+            raise Exception('already add to loop')
+        self._loop = loop
+        # TODO when dns server is IPv6
+        self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM,
+                                   socket.SOL_UDP)
+        self._sock.bind((Config.MANAGE_BIND_IP, Config.MANAGE_PORT))
+        self._sock.setblocking(False)
+        loop.add(self._sock, eventloop.POLL_IN)
+        loop.add_handler(self.handle_events)
+
+    def _handle_data(self, sock):
+        data, addr = sock.recvfrom(128)
+        #manage pwd:port:passwd:action
+        args = data.split(':')
+        if len(args) < 4:
+            return
+        if args[0] == Config.MANAGE_PASS:
+            if args[3] == '0':
+                server_pool.ServerPool.get_instance().cb_del_server(args[1])
+            elif args[3] == '1':
+                server_pool.ServerPool.get_instance().new_server(args[1], args[2])
+
+    def handle_events(self, events):
+        for sock, fd, event in events:
+            if sock != self._sock:
+                continue
+            if event & eventloop.POLL_ERR:
+                logging.error('mgr socket err')
+                self._loop.remove(self._sock)
+                self._sock.close()
+                # TODO when dns server is IPv6
+                self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM,
+                                           socket.SOL_UDP)
+                self._sock.setblocking(False)
+                self._loop.add(self._sock, eventloop.POLL_IN)
+            else:
+                self._handle_data(sock)
+            break
+
+    def close(self):
+        if self._sock:
+            self._sock.close()
+            self._sock = None
+
+
+def test():
+    pass
+
+if __name__ == '__main__':
+    test()