47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
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//go:build windows
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// +build windows
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package quic
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import (
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"errors"
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"syscall"
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"github.com/lucas-clemente/quic-go/internal/utils"
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"golang.org/x/sys/windows"
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)
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const (
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// same for both IPv4 and IPv6 on Windows
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// https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/WinSock/constant.IP_DONTFRAG.html
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// https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/WinSock/constant.IPV6_DONTFRAG.html
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IP_DONTFRAGMENT = 14
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IPV6_DONTFRAG = 14
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)
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func setDF(rawConn syscall.RawConn) error {
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var errDFIPv4, errDFIPv6 error
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if err := rawConn.Control(func(fd uintptr) {
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errDFIPv4 = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IP, IP_DONTFRAGMENT, 1)
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errDFIPv6 = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IPV6, IPV6_DONTFRAG, 1)
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}); err != nil {
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return err
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}
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switch {
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case errDFIPv4 == nil && errDFIPv6 == nil:
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utils.DefaultLogger.Debugf("Setting DF for IPv4 and IPv6.")
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case errDFIPv4 == nil && errDFIPv6 != nil:
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utils.DefaultLogger.Debugf("Setting DF for IPv4.")
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case errDFIPv4 != nil && errDFIPv6 == nil:
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utils.DefaultLogger.Debugf("Setting DF for IPv6.")
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case errDFIPv4 != nil && errDFIPv6 != nil:
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return errors.New("setting DF failed for both IPv4 and IPv6")
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}
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return nil
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}
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func isMsgSizeErr(err error) bool {
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// https://docs.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2
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return errors.Is(err, windows.WSAEMSGSIZE)
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}
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