Ludo',

Welcome back :-)

Ludovic Courtès 写道：
> I don’t get it: the ‘compression-level’ field defaults to 3, 
> and OpenSSH
> does:
>
>   static int
>   start_compression_out(struct ssh *ssh, int level)
>   {
>           if (level < 1 || level > 9)
>                   return SSH_ERR_INVALID_ARGUMENT;
>           debug("Enabling compression at level %d.", level);
>
>   [...]
>
>   }
>
> What’s wrong?

Exactly!

  ~/openssh-8.0p1 λ grep -r start_compression_out
  packet.c:start_compression_out(struct ssh *ssh, int level)
  packet.c:	if ((r = start_compression_out(ssh, 6)) != 0)
  packet.c:	if ((r = start_compression_out(ssh, 6)) != 0)

Kind regards,

T G-R