New: redir proxy

proxy/redir/tcp_linux_other.go

@@ -0,0 +1,14 @@
+// +build linux,!386
+
+package redir
+
+import "syscall"
+
+const GETSOCKOPT = syscall.SYS_GETSOCKOPT
+
+func socketcall(call, a0, a1, a2, a3, a4, a5 uintptr) error {
+	if _, _, errno := syscall.Syscall6(call, a0, a1, a2, a3, a4, a5); errno != 0 {
+		return errno
+	}
+	return nil
+}