71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
# Copyright (c) 2011, 2012 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import copy
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import errno
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import os
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import types
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import ovs.jsonrpc
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import ovs.stream
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import ovs.util
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vlog = ovs.vlog.Vlog("unixctl_client")
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strtypes = types.StringTypes
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class UnixctlClient(object):
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def __init__(self, conn):
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assert isinstance(conn, ovs.jsonrpc.Connection)
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self._conn = conn
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def transact(self, command, argv):
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assert isinstance(command, strtypes)
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assert isinstance(argv, list)
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for arg in argv:
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assert isinstance(arg, strtypes)
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request = ovs.jsonrpc.Message.create_request(command, argv)
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error, reply = self._conn.transact_block(request)
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if error:
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vlog.warn("error communicating with %s: %s"
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% (self._conn.name, os.strerror(error)))
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return error, None, None
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if reply.error is not None:
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return 0, str(reply.error), None
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else:
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assert reply.result is not None
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return 0, None, str(reply.result)
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def close(self):
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self._conn.close()
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self.conn = None
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@staticmethod
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def create(path):
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assert isinstance(path, str)
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unix = "unix:%s" % ovs.util.abs_file_name(ovs.dirs.RUNDIR, path)
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error, stream = ovs.stream.Stream.open_block(
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ovs.stream.Stream.open(unix))
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if error:
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vlog.warn("failed to connect to %s" % path)
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return error, None
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return 0, UnixctlClient(ovs.jsonrpc.Connection(stream))
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