53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
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/*
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*
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* Copyright 2020 gRPC authors.
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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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*
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*/
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package credentials
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import (
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"crypto/tls"
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)
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const alpnProtoStrH2 = "h2"
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// AppendH2ToNextProtos appends h2 to next protos.
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func AppendH2ToNextProtos(ps []string) []string {
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for _, p := range ps {
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if p == alpnProtoStrH2 {
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return ps
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}
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}
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ret := make([]string, 0, len(ps)+1)
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ret = append(ret, ps...)
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return append(ret, alpnProtoStrH2)
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}
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// CloneTLSConfig returns a shallow clone of the exported
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// fields of cfg, ignoring the unexported sync.Once, which
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// contains a mutex and must not be copied.
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//
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// If cfg is nil, a new zero tls.Config is returned.
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//
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// TODO: inline this function if possible.
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func CloneTLSConfig(cfg *tls.Config) *tls.Config {
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if cfg == nil {
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return &tls.Config{}
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}
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return cfg.Clone()
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}
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