diff --git a/Config.py b/Config.py
index 7a444e6..6323abe 100644
--- a/Config.py
+++ b/Config.py
@@ -4,6 +4,7 @@ MYSQL_PORT = 3306
 MYSQL_USER = 'ss'
 MYSQL_PASS = 'ss'
 MYSQL_DB = 'shadowsocks'
+MYSQL_TRANSFER_MUL = 1.0
 
 MANAGE_PASS = 'ss233333333'
 #if you want manage in other server you should set this value to global ip
diff --git a/db_transfer.py b/db_transfer.py
index ba6e3ea..caf60f3 100644
--- a/db_transfer.py
+++ b/db_transfer.py
@@ -37,14 +37,16 @@ class DbTransfer(object):
 					continue
 				elif last_transfer[id][0] <= curr_transfer[id][0] and \
 				last_transfer[id][1] <= curr_transfer[id][1]:
-					dt_transfer[id] = [curr_transfer[id][0] - last_transfer[id][0],
-										curr_transfer[id][1] - last_transfer[id][1]]
+					dt_transfer[id] = [int((curr_transfer[id][0] - last_transfer[id][0]) * Config.MYSQL_TRANSFER_MUL),
+										int((curr_transfer[id][1] - last_transfer[id][1]) * Config.MYSQL_TRANSFER_MUL)]
 				else:
-					dt_transfer[id] = [curr_transfer[id][0], curr_transfer[id][1]]
+					dt_transfer[id] = [int(curr_transfer[id][0] * Config.MYSQL_TRANSFER_MUL),
+										int(curr_transfer[id][1] * Config.MYSQL_TRANSFER_MUL)]
 			else:
 				if curr_transfer[id][0] == 0 and curr_transfer[id][1] == 0:
 					continue
-				dt_transfer[id] = [curr_transfer[id][0], curr_transfer[id][1]]
+				dt_transfer[id] = [int(curr_transfer[id][0] * Config.MYSQL_TRANSFER_MUL),
+									int(curr_transfer[id][1] * Config.MYSQL_TRANSFER_MUL)]
 
 		self.last_get_transfer = curr_transfer
 		query_head = 'UPDATE user'
diff --git a/shadowsocks/obfsplugin/auth.py b/shadowsocks/obfsplugin/auth.py
index 0ed3252..5ffca95 100644
--- a/shadowsocks/obfsplugin/auth.py
+++ b/shadowsocks/obfsplugin/auth.py
@@ -127,13 +127,16 @@ class obfs_auth_data(object):
         self.startup_time = int(time.time() - 30) & 0xFFFFFFFF
         self.local_client_id = b''
         self.connection_id = 0
-        self.max_client = 16                         # max active client count
-        self.max_buffer = max(self.max_client, 256)  # max client id buffer size
+        self.set_max_client(16) # max active client count
 
     def update(self, client_id, connection_id):
         if client_id in self.client_id:
             self.client_id[client_id].update()
 
+    def set_max_client(self, max_client):
+        self.max_client = max_client
+        self.max_buffer = max(self.max_client * 2, 256)
+
     def insert(self, client_id, connection_id):
         if client_id not in self.client_id or not self.client_id[client_id].enable:
             active = 0
@@ -184,6 +187,13 @@ class auth_simple(verify_base):
     def init_data(self):
         return obfs_auth_data()
 
+    def set_server_info(self, server_info):
+        self.server_info = server_info
+        try:
+            max_client = int(server_info.protocol_param)
+        except:
+            pass
+
     def pack_data(self, buf):
         if len(buf) == 0:
             return b''
diff --git a/shadowsocks/obfsplugin/http_simple.py b/shadowsocks/obfsplugin/http_simple.py
index 7c0cf99..2a7a107 100644
--- a/shadowsocks/obfsplugin/http_simple.py
+++ b/shadowsocks/obfsplugin/http_simple.py
@@ -101,7 +101,7 @@ class http_simple(plain.plain):
         if self.server_info.port != 80:
             port = b':' + common.to_bytes(str(self.server_info.port))
         http_head = b"GET /" + self.encode_head(headdata) + b" HTTP/1.1\r\n"
-        http_head += b"Host: " + (self.server_info.param or self.server_info.host) + port + b"\r\n"
+        http_head += b"Host: " + (self.server_info.obfs_param or self.server_info.host) + port + b"\r\n"
         http_head += b"User-Agent: " + random.choice(self.user_agent) + b"\r\n"
         http_head += b"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\nAccept-Language: en-US,en;q=0.8\r\nAccept-Encoding: gzip, deflate\r\nDNT: 1\r\nConnection: keep-alive\r\n\r\n"
         self.has_sent_header = True
@@ -171,8 +171,8 @@ class http_simple(plain.plain):
         else:
             return (b'', True, False)
 
-        datas = buf.split(b'\r\n\r\n', 1)
-        if datas:
+        if b'\r\n\r\n' in buf:
+            datas = buf.split(b'\r\n\r\n', 1)
             ret_buf = self.get_data_from_http_header(buf)
             if len(datas) > 1:
                 ret_buf += datas[1]
@@ -205,7 +205,7 @@ class http2_simple(plain.plain):
                 port = b':' + common.to_bytes(str(self.server_info.port))
             self.has_sent_header = True
             http_head = b"GET / HTTP/1.1\r\n"
-            http_head += b"Host: " + (self.server_info.param or self.server_info.host) + port + b"\r\n"
+            http_head += b"Host: " + (self.server_info.obfs_param or self.server_info.host) + port + b"\r\n"
             http_head += b"Connection: Upgrade, HTTP2-Settings\r\nUpgrade: h2c\r\n"
             http_head += b"HTTP2-Settings: " + base64.urlsafe_b64encode(buf) + b"\r\n"
             return http_head + b"\r\n"
diff --git a/shadowsocks/server.py b/shadowsocks/server.py
index 4c19474..a3a9327 100755
--- a/shadowsocks/server.py
+++ b/shadowsocks/server.py
@@ -69,6 +69,8 @@ def main():
     del config['port_password']
     for port, password_obfs in port_password.items():
         protocol = config.get("protocol", 'origin')
+        protocol_param = config.get("protocol_param", '')
+        obfs = config.get("obfs", 'plain')
         obfs_param = config.get("obfs_param", '')
         if type(password_obfs) == list:
             password = password_obfs[0]
@@ -80,7 +82,6 @@ def main():
             obfs_param = password_obfs.get('obfs_param', '')
         else:
             password = password_obfs
-            obfs = config["obfs"]
         a_config = config.copy()
         ipv6_ok = False
         logging.info("server start with protocol[%s] password [%s] method [%s] obfs [%s] obfs_param [%s]" %
@@ -92,6 +93,7 @@ def main():
                 a_config['server_port'] = int(port)
                 a_config['password'] = password
                 a_config['protocol'] = protocol
+                a_config['protocol_param'] = protocol_param
                 a_config['obfs'] = obfs
                 a_config['obfs_param'] = obfs_param
                 a_config['server'] = a_config['server_ipv6']
@@ -109,6 +111,7 @@ def main():
             a_config['server_port'] = int(port)
             a_config['password'] = password
             a_config['protocol'] = protocol
+            a_config['protocol_param'] = protocol_param
             a_config['obfs'] = obfs
             a_config['obfs_param'] = obfs_param
             logging.info("starting server at %s:%d" %
diff --git a/shadowsocks/shell.py b/shadowsocks/shell.py
index 38d2432..2d636bf 100644
--- a/shadowsocks/shell.py
+++ b/shadowsocks/shell.py
@@ -130,11 +130,11 @@ def get_config(is_local):
     logging.basicConfig(level=logging.INFO,
                         format='%(levelname)-s: %(message)s')
     if is_local:
-        shortopts = 'hd:s:b:p:k:l:m:o:c:t:vq'
+        shortopts = 'hd:s:b:p:k:l:m:P:o:G:g:c:t:vq'
         longopts = ['help', 'fast-open', 'pid-file=', 'log-file=', 'user=',
                     'version']
     else:
-        shortopts = 'hd:s:p:k:m:o:c:t:vq'
+        shortopts = 'hd:s:p:k:m:P:o:G:g:c:t:vq'
         longopts = ['help', 'fast-open', 'pid-file=', 'log-file=', 'workers=',
                     'forbidden-ip=', 'user=', 'manager-address=', 'version']
     try:
@@ -168,8 +168,14 @@ def get_config(is_local):
                 config['server'] = to_str(value)
             elif key == '-m':
                 config['method'] = to_str(value)
+            elif key == '-P':
+                config['protocol'] = to_str(value)
             elif key == '-o':
                 config['obfs'] = to_str(value)
+            elif key == '-G':
+                config['protocol_param'] = to_str(value)
+            elif key == '-g':
+                config['obfs_param'] = to_str(value)
             elif key == '-b':
                 config['local_address'] = to_str(value)
             elif key == '-v':
@@ -219,6 +225,7 @@ def get_config(is_local):
     config['password'] = to_bytes(config.get('password', b''))
     config['method'] = to_str(config.get('method', 'aes-256-cfb'))
     config['protocol'] = to_str(config.get('protocol', 'origin'))
+    config['protocol_param'] = to_str(config.get('protocol_param', ''))
     config['obfs'] = to_str(config.get('obfs', 'plain'))
     config['obfs_param'] = to_str(config.get('obfs_param', ''))
     config['port_password'] = config.get('port_password', None)
diff --git a/shadowsocks/tcprelay.py b/shadowsocks/tcprelay.py
index c24f2b6..8953f21 100644
--- a/shadowsocks/tcprelay.py
+++ b/shadowsocks/tcprelay.py
@@ -115,7 +115,8 @@ class TCPRelayHandler(object):
         server_info = obfs.server_info(server.obfs_data)
         server_info.host = config['server']
         server_info.port = server._listen_port
-        server_info.param = config['obfs_param']
+        server_info.protocol_param = ''
+        server_info.obfs_param = config['obfs_param']
         server_info.iv = self._encryptor.cipher_iv
         server_info.recv_iv = b''
         server_info.key = self._encryptor.cipher_key
@@ -127,7 +128,8 @@ class TCPRelayHandler(object):
         server_info = obfs.server_info(server.protocol_data)
         server_info.host = config['server']
         server_info.port = server._listen_port
-        server_info.param = ''
+        server_info.protocol_param = config['protocol_param']
+        server_info.obfs_param = ''
         server_info.iv = self._encryptor.cipher_iv
         server_info.recv_iv = b''
         server_info.key = self._encryptor.cipher_key
@@ -343,11 +345,12 @@ class TCPRelayHandler(object):
         return (host_post, 80)
 
     def _handel_protocol_error(self, client_address, ogn_data):
-        #raise Exception('can not parse header')
         logging.warn("Protocol ERROR, TCP ogn data %s from %s:%d" % (binascii.hexlify(ogn_data), client_address[0], client_address[1]))
         self._encrypt_correct = False
         #create redirect or disconnect by hash code
         host, port = self._get_redirect_host(client_address, ogn_data)
+        if port == 0:
+            raise Exception('can not parse header')
         data = b"\x03" + common.chr(len(host)) + common.to_bytes(host) + struct.pack('>H', port)
         logging.warn("TCP data redir %s:%d %s" % (host, port, binascii.hexlify(data)))
         return data + ogn_data