func getInterfaceInfos() ([]syscall.InterfaceInfo, error) {
s, err := sysSocket(syscall.AF_INET, syscall.SOCK_DGRAM, syscall.IPPROTO_UDP)
if err != nil {
return nil, os.NewSyscallError("Socket", err)
}
defer syscall.Closesocket(s)
iia := [20]syscall.InterfaceInfo{}
ret := uint32(0)
size := uint32(unsafe.Sizeof(iia))
err = syscall.WSAIoctl(s, syscall.SIO_GET_INTERFACE_LIST, nil, 0, (*byte)(unsafe.Pointer(&iia[0])), size, &ret, nil, 0)
if err != nil {
return nil, os.NewSyscallError("WSAIoctl", err)
}
iilen := ret / uint32(unsafe.Sizeof(iia[0]))
return iia[:iilen-1], nil
}
func getInterfaceList() ([]syscall.InterfaceInfo, os.Error) {
s, e := syscall.Socket(syscall.AF_INET, syscall.SOCK_DGRAM, syscall.IPPROTO_UDP)
if e != 0 {
return nil, os.NewSyscallError("Socket", e)
}
defer syscall.Closesocket(s)
ii := [20]syscall.InterfaceInfo{}
ret := uint32(0)
size := uint32(unsafe.Sizeof(ii))
e = syscall.WSAIoctl(s, syscall.SIO_GET_INTERFACE_LIST, nil, 0, (*byte)(unsafe.Pointer(&ii[0])), size, &ret, nil, 0)
if e != 0 {
return nil, os.NewSyscallError("WSAIoctl", e)
}
c := ret / uint32(unsafe.Sizeof(ii[0]))
return ii[:c-1], nil
}
func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
if err := fd.incref(); err != nil {
return err
}
defer fd.decref()
// The kernel expects milliseconds so round to next highest
// millisecond.
d += (time.Millisecond - time.Nanosecond)
msecs := uint32(d / time.Millisecond)
ka := syscall.TCPKeepalive{
OnOff: 1,
Time: msecs,
Interval: msecs,
}
ret := uint32(0)
size := uint32(unsafe.Sizeof(ka))
err := syscall.WSAIoctl(fd.sysfd, syscall.SIO_KEEPALIVE_VALS, (*byte)(unsafe.Pointer(&ka)), size, nil, 0, &ret, nil, 0)
return os.NewSyscallError("WSAIoctl", err)
}
func (fd *netFD) init() error {
if err := fd.pd.Init(fd); err != nil {
return err
}
if hasLoadSetFileCompletionNotificationModes {
// We do not use events, so we can skip them always.
flags := uint8(syscall.FILE_SKIP_SET_EVENT_ON_HANDLE)
// It's not safe to skip completion notifications for UDP:
// http://blogs.technet.com/b/winserverperformance/archive/2008/06/26/designing-applications-for-high-performance-part-iii.aspx
if skipSyncNotif && fd.net == "tcp" {
flags |= syscall.FILE_SKIP_COMPLETION_PORT_ON_SUCCESS
}
err := syscall.SetFileCompletionNotificationModes(fd.sysfd, flags)
if err == nil && flags&syscall.FILE_SKIP_COMPLETION_PORT_ON_SUCCESS != 0 {
fd.skipSyncNotif = true
}
}
// Disable SIO_UDP_CONNRESET behavior.
// http://support.microsoft.com/kb/263823
switch fd.net {
case "udp", "udp4", "udp6":
ret := uint32(0)
flag := uint32(0)
size := uint32(unsafe.Sizeof(flag))
err := syscall.WSAIoctl(fd.sysfd, syscall.SIO_UDP_CONNRESET, (*byte)(unsafe.Pointer(&flag)), size, nil, 0, &ret, nil, 0)
if err != nil {
return os.NewSyscallError("WSAIoctl", err)
}
}
fd.rop.mode = 'r'
fd.wop.mode = 'w'
fd.rop.fd = fd
fd.wop.fd = fd
fd.rop.runtimeCtx = fd.pd.runtimeCtx
fd.wop.runtimeCtx = fd.pd.runtimeCtx
if !canCancelIO {
fd.rop.errc = make(chan error)
fd.wop.errc = make(chan error)
}
return nil
}