merge master

shadowsocks/udprelay.py

@@ -76,8 +76,9 @@ from shadowsocks.common import pre_parse_header, parse_header, pack_addr
 BUF_SIZE = 65536
 
 
-def client_key(a, b, c, d):
+def client_key(source_addr, server_af):
-    return '%s:%s:%s:%s' % (a, b, c, d)
+    # notice this is server af, not dest af
+    return '%s:%s:%d' % (source_addr[0], source_addr[1], server_af)
 
 
 class UDPRelay(object):
@@ -102,6 +103,7 @@ class UDPRelay(object):
                                          close_callback=self._close_client)
         self._client_fd_to_server_addr = \
             lru_cache.LRUCache(timeout=config['timeout'])
+        self._dns_cache = lru_cache.LRUCache(timeout=300)
         self._eventloop = None
         self._closed = False
         self._last_time = time.time()
@@ -172,24 +174,25 @@ class UDPRelay(object):
 
         if self._is_local:
             server_addr, server_port = self._get_a_server()
-            key = client_key(r_addr[0], r_addr[1], dest_addr, dest_port)
         else:
             server_addr, server_port = dest_addr, dest_port
-            addrs = socket.getaddrinfo(dest_addr, dest_port, 0, socket.SOCK_DGRAM, socket.SOL_UDP)
+
-            if addrs:
+        addrs = self._dns_cache.get(server_addr, None)
-                af, socktype, proto, canonname, sa = addrs[0]
+        if addrs is None:
-                key = client_key(r_addr[0], r_addr[1], af, 0)
+            addrs = socket.getaddrinfo(server_addr, server_port, 0,
+                                       socket.SOCK_DGRAM, socket.SOL_UDP)
+            if not addrs:
+                # drop
+                return
             else:
-                key = None
+                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
-            #logging.info('UDP handle_server %s:%d from %s:%d' % (common.to_str(server_addr), server_port, self._listen_addr, self._listen_port))
-            addrs = socket.getaddrinfo(server_addr, server_port, 0,
-                                       socket.SOCK_DGRAM, socket.SOL_UDP)
-            if addrs:
-                af, socktype, proto, canonname, sa = addrs[0]
             if self._forbidden_iplist:
                 if common.to_str(sa[0]) in self._forbidden_iplist:
                     logging.debug('IP %s is in forbidden list, drop' %
@@ -200,9 +203,7 @@ class UDPRelay(object):
             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)
 

tests/jenkins.sh

@@ -69,7 +69,7 @@ if [ -f /proc/sys/net/ipv4/tcp_fastopen ] ; then
 fi
 
 run_test tests/test_large_file.sh
-
+run_test tests/test_udp_src.sh
 run_test tests/test_command.sh
 
 coverage combine && coverage report --include=shadowsocks/*

utils/fail2ban/shadowsocks.conf

@@ -0,0 +1,5 @@
+[Definition]
+
+_daemon = shadowsocks
+
+failregex = ^\s+ERROR\s+can not parse header when handling connection from <HOST>:\d+$