wasi: fix nonblocking sockets on *NIX (gotip net/http) (#1503)

Signed-off-by: Adrian Cole <adrian@tetrate.io>
Co-authored-by: Edoardo Vacchi <evacchi@users.noreply.github.com>

internal/sysfs/sock_unsupported.go

@@ -5,11 +5,22 @@ package sysfs
 import (
 	"net"
 	"syscall"
+
+	socketapi "github.com/tetratelabs/wazero/internal/sock"
 )
 
-// MSG_PEEK is a filler value
+// MSG_PEEK is a filler value.
 const MSG_PEEK = 0x2
 
-func recvfromPeek(conn *net.TCPConn, p []byte) (n int, errno syscall.Errno) {
-	return 0, syscall.ENOSYS
+func newTCPListenerFile(tl *net.TCPListener) socketapi.TCPSock {
+	return &unsupportedSockFile{}
+}
+
+type unsupportedSockFile struct {
+	baseSockFile
+}
+
+// Accept implements the same method as documented on socketapi.TCPSock
+func (f *unsupportedSockFile) Accept() (socketapi.TCPConn, syscall.Errno) {
+	return nil, syscall.ENOSYS
 }