github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/internal/nettest/stack_windows.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package nettest
     6  
     7  import (
     8  	"fmt"
     9  	"runtime"
    10  	"syscall"
    11  )
    12  
    13  // SupportsRawIPSocket reports whether the platform supports raw IP
    14  // sockets.
    15  func SupportsRawIPSocket() (string, bool) {
    16  	// From http://msdn.microsoft.com/en-us/library/windows/desktop/ms740548.aspx:
    17  	// Note: To use a socket of type SOCK_RAW requires administrative privileges.
    18  	// Users running Winsock applications that use raw sockets must be a member of
    19  	// the Administrators group on the local computer, otherwise raw socket calls
    20  	// will fail with an error code of WSAEACCES. On Windows Vista and later, access
    21  	// for raw sockets is enforced at socket creation. In earlier versions of Windows,
    22  	// access for raw sockets is enforced during other socket operations.
    23  	s, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_RAW, 0)
    24  	if err == syscall.WSAEACCES {
    25  		return fmt.Sprintf("no access to raw socket allowed on %s", runtime.GOOS), false
    26  	}
    27  	if err != nil {
    28  		return err.Error(), false
    29  	}
    30  	syscall.Closesocket(s)
    31  	return "", true
    32  }