feat: support SCTP & UDP as endpoint type (#352)

* feat: support SCTP & UDP as endpoint type

* update README

* modify endpoint type test for sctp & udp

vendor/github.com/ishidawataru/sctp/sctp_unsupported.go

@@ -0,0 +1,98 @@
+// +build !linux linux,386
+// Copyright 2019 Wataru Ishida. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sctp
+
+import (
+	"errors"
+	"net"
+	"runtime"
+	"syscall"
+)
+
+var ErrUnsupported = errors.New("SCTP is unsupported on " + runtime.GOOS + "/" + runtime.GOARCH)
+
+func setsockopt(fd int, optname, optval, optlen uintptr) (uintptr, uintptr, error) {
+	return 0, 0, ErrUnsupported
+}
+
+func getsockopt(fd int, optname, optval, optlen uintptr) (uintptr, uintptr, error) {
+	return 0, 0, ErrUnsupported
+}
+
+func (c *SCTPConn) SCTPWrite(b []byte, info *SndRcvInfo) (int, error) {
+	return 0, ErrUnsupported
+}
+
+func (c *SCTPConn) SCTPRead(b []byte) (int, *SndRcvInfo, error) {
+	return 0, nil, ErrUnsupported
+}
+
+func (c *SCTPConn) Close() error {
+	return ErrUnsupported
+}
+
+func (c *SCTPConn) SetWriteBuffer(bytes int) error {
+	return ErrUnsupported
+}
+
+func (c *SCTPConn) GetWriteBuffer() (int, error) {
+	return 0, ErrUnsupported
+}
+
+func (c *SCTPConn) SetReadBuffer(bytes int) error {
+	return ErrUnsupported
+}
+
+func (c *SCTPConn) GetReadBuffer() (int, error) {
+	return 0, ErrUnsupported
+}
+
+func ListenSCTP(net string, laddr *SCTPAddr) (*SCTPListener, error) {
+	return nil, ErrUnsupported
+}
+
+func ListenSCTPExt(net string, laddr *SCTPAddr, options InitMsg) (*SCTPListener, error) {
+	return nil, ErrUnsupported
+}
+
+func listenSCTPExtConfig(network string, laddr *SCTPAddr, options InitMsg, control func(network, address string, c syscall.RawConn) error) (*SCTPListener, error) {
+	return nil, ErrUnsupported
+}
+
+func (ln *SCTPListener) Accept() (net.Conn, error) {
+	return nil, ErrUnsupported
+}
+
+func (ln *SCTPListener) AcceptSCTP() (*SCTPConn, error) {
+	return nil, ErrUnsupported
+}
+
+func (ln *SCTPListener) Close() error {
+	return ErrUnsupported
+}
+
+func DialSCTP(net string, laddr, raddr *SCTPAddr) (*SCTPConn, error) {
+	return nil, ErrUnsupported
+}
+
+func DialSCTPExt(network string, laddr, raddr *SCTPAddr, options InitMsg) (*SCTPConn, error) {
+	return nil, ErrUnsupported
+}
+
+func dialSCTPExtConfig(network string, laddr, raddr *SCTPAddr, options InitMsg, control func(network, address string, c syscall.RawConn) error) (*SCTPConn, error) {
+	return nil, ErrUnsupported
+}