50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
//go:build windows
|
|
|
|
package quic
|
|
|
|
import (
|
|
"errors"
|
|
"syscall"
|
|
|
|
"golang.org/x/sys/windows"
|
|
|
|
"github.com/quic-go/quic-go/internal/utils"
|
|
)
|
|
|
|
const (
|
|
// IP_DONTFRAGMENT controls the Don't Fragment (DF) bit.
|
|
//
|
|
// It's the same code point for both IPv4 and IPv6 on Windows.
|
|
// https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/WinSock/constant.IP_DONTFRAG.html
|
|
// https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/WinSock/constant.IPV6_DONTFRAG.html
|
|
//
|
|
//nolint:stylecheck
|
|
IP_DONTFRAGMENT = 14
|
|
)
|
|
|
|
func setDF(rawConn syscall.RawConn) (bool, error) {
|
|
var errDFIPv4, errDFIPv6 error
|
|
if err := rawConn.Control(func(fd uintptr) {
|
|
errDFIPv4 = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IP, IP_DONTFRAGMENT, 1)
|
|
errDFIPv6 = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IPV6, IP_DONTFRAGMENT, 1)
|
|
}); err != nil {
|
|
return false, err
|
|
}
|
|
switch {
|
|
case errDFIPv4 == nil && errDFIPv6 == nil:
|
|
utils.DefaultLogger.Debugf("Setting DF for IPv4 and IPv6.")
|
|
case errDFIPv4 == nil && errDFIPv6 != nil:
|
|
utils.DefaultLogger.Debugf("Setting DF for IPv4.")
|
|
case errDFIPv4 != nil && errDFIPv6 == nil:
|
|
utils.DefaultLogger.Debugf("Setting DF for IPv6.")
|
|
case errDFIPv4 != nil && errDFIPv6 != nil:
|
|
return false, errors.New("setting DF failed for both IPv4 and IPv6")
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
func isMsgSizeErr(err error) bool {
|
|
// https://docs.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2
|
|
return errors.Is(err, windows.WSAEMSGSIZE)
|
|
}
|