if conns > b.N {
			conns = b.N
		}
	}
	sendMsg := func(c Conn, buf []byte) bool {
		n, err := c.Write(buf)
		if n != len(buf) || err != nil {
			b.Log(err)
			return false
		}
		return true
	}
	recvMsg := func(c Conn, buf []byte) bool {
		for read := 0; read != len(buf); {
			n, err := c.Read(buf)
			read += n
			if err != nil {
				b.Log(err)
				return false
			}
		}
		return true
	}

				if err = fd.pd.waitRead(fd.isFile); err == nil {
					continue
				}
			}
		}
		err = fd.eofError(n, err)
		return n, err
	}
}

// ReadMsg wraps the recvmsg network call.
func (fd *FD) ReadMsg(p []byte, oob []byte, flags int) (int, int, int, syscall.Sockaddr, error) {
	if err := fd.readLock(); err != nil {
		return 0, 0, 0, nil, err
	}
	defer fd.readUnlock()

//sys	Shutdown(s int, how int) (err error)

// In order to use msghdr structure with Control, Controllen in golang.org/x/net,
// nrecvmsg and nsendmsg must be used.
//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = nrecvmsg
//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = nsendmsg

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {

		if len(p) == 0 {
			iov.Base = &dummy
			iov.SetLen(1)
		}
		msg.Accrights = (*int8)(unsafe.Pointer(&oob[0]))
		msg.Accrightslen = int32(len(oob))
	}
	msg.Iov = &iov
	msg.Iovlen = 1
	if n, err = recvmsg(fd, &msg, flags); err != nil {
		return
	}
	oobn = int(msg.Accrightslen)
	return
}

//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.__xnet_sendmsg

	pp := (*RawSockaddrInet6)(unsafe.Pointer(&rsa))
	port := (*[2]byte)(unsafe.Pointer(&pp.Port))
	from.Port = int(port[0])<<8 + int(port[1])
	from.ZoneId = pp.Scope_id
	from.Addr = pp.Addr
	return
}

func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) {
	var rsa RawSockaddrAny
	n, oobn, recvflags, err = recvmsgRaw(fd, p, oob, flags, &rsa)

func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
	n = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_recvmsg_trampoline()

//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.so"

func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
	n = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_recvmsg_trampoline()

//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.so"

func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
	n = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_recvmsg_trampoline()

//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.so"

func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
	n = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_recvmsg_trampoline()

//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.so"

func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
	n = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_recvmsg_trampoline()

//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.so"