58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
//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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"fmt"
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"net"
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"syscall"
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"golang.org/x/sys/windows"
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)
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const (
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disablePathMTUDiscovery = true
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IP_DONTFRAGMENT = 14
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)
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func newConn(c OOBCapablePacketConn) (connection, error) {
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rawConn, err := c.SyscallConn()
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if err != nil {
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return nil, fmt.Errorf("couldn't get syscall.RawConn: %w", err)
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}
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if err := rawConn.Control(func(fd uintptr) {
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// This should succeed if the connection is a IPv4 or a dual-stack connection.
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// It will fail for IPv6 connections.
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// TODO: properly handle error.
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_ = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IP, IP_DONTFRAGMENT, 1)
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}); err != nil {
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return nil, err
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}
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return &basicConn{PacketConn: c}, nil
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}
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func inspectReadBuffer(c net.PacketConn) (int, error) {
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conn, ok := c.(interface {
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SyscallConn() (syscall.RawConn, error)
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})
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if !ok {
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return 0, errors.New("doesn't have a SyscallConn")
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}
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rawConn, err := conn.SyscallConn()
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if err != nil {
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return 0, fmt.Errorf("couldn't get syscall.RawConn: %w", err)
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}
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var size int
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var serr error
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if err := rawConn.Control(func(fd uintptr) {
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size, serr = windows.GetsockoptInt(windows.Handle(fd), windows.SOL_SOCKET, windows.SO_RCVBUF)
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}); err != nil {
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return 0, err
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}
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return size, serr
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}
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func (i *packetInfo) OOB() []byte { return nil }
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