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-rw-r--r--src/vpp-api/python/vpp_papi/vpp_transport_socket.py43
1 files changed, 32 insertions, 11 deletions
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 caee43f4713..115a2c26428 100644
--- a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
+++ b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
@@ -11,6 +11,7 @@ try:
except ImportError:
import Queue as queue
import logging
+from . import vpp_papi
class VppTransportSocketIOError(IOError):
@@ -28,9 +29,11 @@ class VppTransport(object):
self.server_address = server_address
self.header = struct.Struct('>QII')
self.message_table = {}
- self.sque = multiprocessing.Queue()
- self.q = multiprocessing.Queue()
- self.message_thread = None # Will be set on connect().
+ # The following fields are set in connect().
+ self.sque = None
+ self.q = None
+ self.message_thread = None
+ self.socket = None
def msg_thread_func(self):
while True:
@@ -69,11 +72,12 @@ class VppTransport(object):
2, 'Unknown response from select')
def connect(self, name, pfx, msg_handler, rx_qlen):
+ # TODO: Reorder the actions and add "roll-backs",
+ # to restore clean disconnect state when failure happens durng connect.
if self.message_thread is not None:
raise VppTransportSocketIOError(
1, "PAPI socket transport connect: Need to disconnect first.")
- self.message_thread = threading.Thread(target=self.msg_thread_func)
# Create a UDS socket
self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
@@ -87,6 +91,12 @@ class VppTransport(object):
raise
self.connected = True
+
+ # TODO: Can this block be moved even later?
+ self.sque = multiprocessing.Queue()
+ self.q = multiprocessing.Queue()
+ self.message_thread = threading.Thread(target=self.msg_thread_func)
+
# Initialise sockclnt_create
sockclnt_create = self.parent.messages['sockclnt_create']
sockclnt_create_reply = self.parent.messages['sockclnt_create_reply']
@@ -114,18 +124,29 @@ class VppTransport(object):
return 0
def disconnect(self):
- # TODO: Should we detect if user forgot to connect first?
+ # TODO: Support repeated disconnect calls, recommend users to call
+ # disconnect when they are not sure what the state is after failures.
+ # TODO: Any volunteer for comprehensive docstrings?
rv = 0
- try: # Might fail, if VPP closes socket before packet makes it out
+ try:
+ # Might fail, if VPP closes socket before packet makes it out,
+ # or if there was a failure during connect().
rv = self.parent.api.sockclnt_delete(index=self.socket_index)
- except IOError:
+ except (IOError, vpp_papi.VPPApiError):
pass
self.connected = False
- self.socket.close()
- self.sque.put(True) # Terminate listening thread
- self.message_thread.join()
- # Allow additional connect() calls.
+ if self.socket is not None:
+ self.socket.close()
+ if self.sque is not None:
+ self.sque.put(True) # Terminate listening thread
+ if self.message_thread is not None:
+ # Allow additional connect() calls.
+ self.message_thread.join()
+ # Collect garbage.
+ self.sque = None
+ self.q = None
self.message_thread = None
+ self.socket = None
return rv
def suspend(self):