github.com/pawelgaczynski/gain@v0.4.0-alpha.0.20230821120126-41f1e60a18da/common.go (about)

     1  // Copyright (c) 2023 Paweł Gaczyński
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package gain
    16  
    17  import (
    18  	"syscall"
    19  	_ "unsafe" //nolint:revive // it is required for go:linkname directive
    20  )
    21  
    22  type void struct{}
    23  
    24  var member void
    25  
    26  const uint64Size = 64
    27  
    28  func createClientAddr() (*syscall.RawSockaddrAny, *uint32) {
    29  	clientAddrLen := new(uint32)
    30  	clientAddr := &syscall.RawSockaddrAny{}
    31  	*clientAddrLen = syscall.SizeofSockaddrAny
    32  
    33  	return clientAddr, clientAddrLen
    34  }
    35  
    36  //go:linkname anyToSockaddr syscall.anyToSockaddr
    37  func anyToSockaddr(rsa *syscall.RawSockaddrAny) (syscall.Sockaddr, error)
    38  
    39  func boolToInt(b bool) int {
    40  	if b {
    41  		return 1
    42  	}
    43  
    44  	return 0
    45  }