dubbo.apache.org/dubbo-go/v3@v3.1.1/xds/utils/transport/conn.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  /*
    19   *
    20   * Copyright 2020 gRPC authors.
    21   *
    22   */
    23  
    24  package transport
    25  
    26  import (
    27  	"context"
    28  	"net"
    29  )
    30  
    31  type connectionKey struct{}
    32  
    33  // GetConnection gets the connection from the context.
    34  func GetConnection(ctx context.Context) net.Conn {
    35  	conn, _ := ctx.Value(connectionKey{}).(net.Conn)
    36  	return conn
    37  }
    38  
    39  // SetConnection adds the connection to the context to be able to get
    40  // information about the destination ip and port for an incoming RPC. This also
    41  // allows any unary or streaming interceptors to see the connection.
    42  func setConnection(ctx context.Context, conn net.Conn) context.Context {
    43  	return context.WithValue(ctx, connectionKey{}, conn)
    44  }