API: Use string type instead of u8.

[vpp.git] / src / vpp-api / python / vpp_papi / vpp_transport_socket.py

diff --git a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
index 1822deb..4341cad 100644 (file)
--- a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
+++ b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
@@ -6,10 +6,20 @@ import struct
 import threading
 import select
 import multiprocessing
+try:
+    import queue as queue
+except ImportError:
+    import Queue as queue
 import logging
 
 
-class VppTransport:
+class VppTransportSocketIOError(IOError):
+    pass
+
+
+class VppTransport(object):
+    VppTransportSocketIOError = VppTransportSocketIOError
+
     def __init__(self, parent, read_timeout, server_address):
         self.connected = False
         self.read_timeout = read_timeout if read_timeout > 0 else 1
@@ -49,13 +59,13 @@ class VppTransport:
                         return
                     # Put either to local queue or if context == 0
                     # callback queue
-                    r = self.parent.decode_incoming_msg(msg)
-                    if hasattr(r, 'context') and r.context > 0:
+                    if self.parent.has_context(msg):
                         self.q.put(msg)
                     else:
                         self.parent.msg_handler_async(msg)
                 else:
-                    raise IOError(2, 'Unknown response from select')
+                    raise VppTransportSocketIOError(
+                        2, 'Unknown response from select')
 
     def connect(self, name, pfx, msg_handler, rx_qlen):
 
@@ -67,11 +77,10 @@ class VppTransport:
         try:
             self.socket.connect(self.server_address)
         except socket.error as msg:
-            logging.error(msg)
+            logging.error("{} on socket {}".format(msg, self.server_address))
             raise
 
         self.connected = True
-
         # Initialise sockclnt_create
         sockclnt_create = self.parent.messages['sockclnt_create']
         sockclnt_create_reply = self.parent.messages['sockclnt_create_reply']
@@ -84,7 +93,7 @@ class VppTransport:
         msg = self._read()
         hdr, length = self.parent.header.unpack(msg, 0)
         if hdr.msgid != 16:
-            raise IOError('Invalid reply message')
+            raise VppTransportSocketIOError('Invalid reply message')
 
         r, length = sockclnt_create_reply.unpack(msg)
         self.socket_index = r.index
@@ -98,6 +107,7 @@ class VppTransport:
         return 0
 
     def disconnect(self):
+        rv = 0
         try:  # Might fail, if VPP closes socket before packet makes it out
             rv = self.parent.api.sockclnt_delete(index=self.socket_index)
         except IOError:
@@ -106,6 +116,7 @@ class VppTransport:
         self.socket.close()
         self.sque.put(True)  # Terminate listening thread
         self.message_thread.join()
+        return rv
 
     def suspend(self):
         pass
@@ -114,9 +125,9 @@ class VppTransport:
         pass
 
     def callback(self):
-        raise NotImplemented
+        raise NotImplementedError
 
-    def get_callback(self, async):
+    def get_callback(self, do_async):
         return self.callback
 
     def get_msg_index(self, name):
@@ -131,7 +142,7 @@ class VppTransport:
     def write(self, buf):
         """Send a binary-packed message to VPP."""
         if not self.connected:
-            raise IOError(1, 'Not connected')
+            raise VppTransportSocketIOError(1, 'Not connected')
 
         # Send header
         header = self.header.pack(0, len(buf), 0)
@@ -172,5 +183,8 @@ class VppTransport:
 
     def read(self):
         if not self.connected:
-            raise IOError(1, 'Not connected')
-        return self.q.get()
+            raise VppTransportSocketIOError(1, 'Not connected')
+        try:
+            return self.q.get(True, self.read_timeout)
+        except queue.Empty:
+            return None