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# Copyright (c) 2016 Uber Technologies, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from thrift.transport.TTransport import TTransportBase
import socket
logger = logging.getLogger('jaeger_tracing')
class TUDPTransport(TTransportBase, object):
"""
TUDPTransport implements just enough of the tornado transport interface
to work for blindly sending UDP packets.
"""
DEFAULT_SOCKET_FAMILY = socket.AF_INET
def __init__(self, host, port, blocking=False):
self.transport_host = host
self.transport_port = port
self.transport_sock = self._create_socket()
self.transport_sock.setblocking(blocking)
def _create_socket(self) -> socket.socket:
family, type, proto = (self.DEFAULT_SOCKET_FAMILY, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
try:
addrinfo = socket.getaddrinfo(
self.transport_host, self.transport_port, type=socket.SOCK_DGRAM
)
if addrinfo:
family, type, proto, *_ = addrinfo[0]
except socket.gaierror:
pass
return socket.socket(family, type, proto)
def write(self, buf):
"""Raw write to the UDP socket."""
return self.transport_sock.sendto(
buf,
(self.transport_host, self.transport_port)
)
def isOpen(self):
"""
isOpen for UDP is always true (there is no connection) as long
as we have a sock
"""
return self.transport_sock is not None
def close(self):
self.transport_sock.close()
self.transport_sock = None
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