add ipv6 config

config.json

@@ -9,6 +9,7 @@
     "method": "aes-256-cfb",
     "obfs": "http_simple_compatible",
     "obfs_param": "",
+    "ipv6": false,
     "fast_open": false,
     "workers": 1
 }

shadowsocks/local.py

@@ -43,6 +43,9 @@ def main():
 
     config = shell.get_config(True)
 
+    if not config.get('ipv6', False):
+        asyncdns.IPV6_CONNECTION_SUPPORT = False
+
     daemon.daemon_exec(config)
 
     try:

shadowsocks/server.py

@@ -54,6 +54,9 @@ def main():
         else:
             config['port_password'][str(server_port)] = config['password']
 
+    if not config.get('ipv6', False):
+        asyncdns.IPV6_CONNECTION_SUPPORT = False
+
     if config.get('manager_address', 0):
         logging.info('entering manager mode')
         manager.run(config)