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