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Don Newton379ae252019-04-01 12:17:06 -04001/*
2 *
3 * Copyright 2014 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * 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// Package peer defines various peer information associated with RPCs and
20// corresponding utils.
21package peer
22
23import (
24 "context"
25 "net"
26
27 "google.golang.org/grpc/credentials"
28)
29
30// Peer contains the information of the peer for an RPC, such as the address
31// and authentication information.
32type Peer struct {
33 // Addr is the peer address.
34 Addr net.Addr
35 // AuthInfo is the authentication information of the transport.
36 // It is nil if there is no transport security being used.
37 AuthInfo credentials.AuthInfo
38}
39
40type peerKey struct{}
41
42// NewContext creates a new context with peer information attached.
43func NewContext(ctx context.Context, p *Peer) context.Context {
44 return context.WithValue(ctx, peerKey{}, p)
45}
46
47// FromContext returns the peer information in ctx if it exists.
48func FromContext(ctx context.Context) (p *Peer, ok bool) {
49 p, ok = ctx.Value(peerKey{}).(*Peer)
50 return
51}