make runtime compatible with wasm

runtime/internal/clite/syscall/net_fake.go

@@ -0,0 +1,65 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Fake networking for js/wasm and wasip1/wasm.
+
+//go:build js || wasm
+
+package syscall
+
+const (
+	AF_UNSPEC = iota
+	AF_UNIX
+	AF_INET
+	AF_INET6
+)
+
+const (
+	SOCK_STREAM = 1 + iota
+	SOCK_DGRAM
+	SOCK_RAW
+	SOCK_SEQPACKET
+)
+
+const (
+	IPPROTO_IP   = 0
+	IPPROTO_IPV4 = 4
+	IPPROTO_IPV6 = 0x29
+	IPPROTO_TCP  = 6
+	IPPROTO_UDP  = 0x11
+)
+
+const (
+	SOMAXCONN = 0x80
+)
+
+const (
+	_ = iota
+	IPV6_V6ONLY
+	SO_ERROR
+)
+
+// Misc constants expected by package net but not supported.
+const (
+	_ = iota
+	F_DUPFD_CLOEXEC
+	SYS_FCNTL = 500 // unsupported
+)
+
+type Sockaddr any
+
+type SockaddrInet4 struct {
+	Port int
+	Addr [4]byte
+}
+
+type SockaddrInet6 struct {
+	Port   int
+	ZoneId uint32
+	Addr   [16]byte
+}
+
+type SockaddrUnix struct {
+	Name string
+}