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// Copyright 2018 The gVisor Authors.
//
// 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.
package tcp
import (
"reflect"
"unsafe"
)
// optionsToArray converts a slice of capacity >-= maxOptionSize to an array.
//
// optionsToArray panics if the capacity of options is smaller than
// maxOptionSize.
func optionsToArray(options []byte) *[maxOptionSize]byte {
// Reslice to full capacity.
options = options[0:maxOptionSize]
return (*[maxOptionSize]byte)(unsafe.Pointer((*reflect.SliceHeader)(unsafe.Pointer(&options)).Data))
}
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