feat: Waku v2 bridge

Issue #12610

vendor/github.com/mikioh/tcpopt/sys.go

@@ -0,0 +1,66 @@
+// Copyright 2016 Mikio Hara. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tcpopt
+
+import (
+	"encoding/binary"
+	"time"
+	"unsafe"
+)
+
+var nativeEndian binary.ByteOrder
+
+func init() {
+	i := uint32(1)
+	b := (*[4]byte)(unsafe.Pointer(&i))
+	if b[0] == 1 {
+		nativeEndian = binary.LittleEndian
+	} else {
+		nativeEndian = binary.BigEndian
+	}
+}
+
+func boolint32(b bool) int32 {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func uint32bool(n uint32) bool {
+	if n != 0 {
+		return true
+	}
+	return false
+}
+
+const (
+	ianaProtocolIP   = 0x0
+	ianaProtocolTCP  = 0x6
+	ianaProtocolIPv6 = 0x29
+)
+
+const (
+	soNodelay = iota
+	soSndbuf
+	soRcvbuf
+	soKeepalive
+	soKeepidle
+	soKeepintvl
+	soKeepcnt
+	soCork
+	soNotsentLOWAT
+	soError
+	soECN
+	soMaxseg
+	soMax
+)
+
+// An option represents a binding for socket option.
+type option struct {
+	level int           // option level
+	name  int           // option name, must be equal or greater than 1
+	uot   time.Duration // unit of time
+}