> On 2 Jan 2025, at 09:02, Theo de Raadt <deraadt@openbsd.org> wrote:
> 
> No, printf should not print IP addresses.  Create a helper function
> that returns a static string, and print it with %.  Yes that means
> you can'to do two of them nicely in one call.  That's not terribly
> rough.  That is how this is done in userland.

This helper could use external buffer to printf. This allows
simultaneous runs. I mean:

char *
print_ip(struct sockaddr_in *sin, char *buf, size_t buf_sz)
{
	/* do printf */
	return buf;
}