khenaidoo | 5fc5cea | 2021-08-11 17:39:16 -0400 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2020 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 networktype declares the network type to be used in the default |
| 20 | // dialer. Attribute of a resolver.Address. |
| 21 | package networktype |
| 22 | |
| 23 | import ( |
| 24 | "google.golang.org/grpc/resolver" |
| 25 | ) |
| 26 | |
| 27 | // keyType is the key to use for storing State in Attributes. |
| 28 | type keyType string |
| 29 | |
| 30 | const key = keyType("grpc.internal.transport.networktype") |
| 31 | |
| 32 | // Set returns a copy of the provided address with attributes containing networkType. |
| 33 | func Set(address resolver.Address, networkType string) resolver.Address { |
khenaidoo | 5cb0d40 | 2021-12-08 14:09:16 -0500 | [diff] [blame] | 34 | address.Attributes = address.Attributes.WithValue(key, networkType) |
khenaidoo | 5fc5cea | 2021-08-11 17:39:16 -0400 | [diff] [blame] | 35 | return address |
| 36 | } |
| 37 | |
| 38 | // Get returns the network type in the resolver.Address and true, or "", false |
| 39 | // if not present. |
| 40 | func Get(address resolver.Address) (string, bool) { |
| 41 | v := address.Attributes.Value(key) |
| 42 | if v == nil { |
| 43 | return "", false |
| 44 | } |
| 45 | return v.(string), true |
| 46 | } |