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https://github.com/chai2010/advanced-go-programming-book.git
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43 lines
1.3 KiB
Go
43 lines
1.3 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package nettest
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import (
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"fmt"
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"runtime"
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"syscall"
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)
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func maxOpenFiles() int {
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return 4 * defaultMaxOpenFiles /* actually it's 16581375 */
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}
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func supportsRawIPSocket() (string, bool) {
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// From http://msdn.microsoft.com/en-us/library/windows/desktop/ms740548.aspx:
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// Note: To use a socket of type SOCK_RAW requires administrative privileges.
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// Users running Winsock applications that use raw sockets must be a member of
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// the Administrators group on the local computer, otherwise raw socket calls
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// will fail with an error code of WSAEACCES. On Windows Vista and later, access
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// for raw sockets is enforced at socket creation. In earlier versions of Windows,
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// access for raw sockets is enforced during other socket operations.
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s, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_RAW, 0)
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if err == syscall.WSAEACCES {
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return fmt.Sprintf("no access to raw socket allowed on %s", runtime.GOOS), false
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}
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if err != nil {
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return err.Error(), false
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}
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syscall.Closesocket(s)
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return "", true
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}
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func supportsIPv6MulticastDeliveryOnLoopback() bool {
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return true
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}
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func causesIPv6Crash() bool {
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return false
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}
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