> On 12/16/2002 9:45 PM, Vincent Jardin wrote:
> >
> > With FreeBSD, there are many ways to create a recursive local encapsulation
> > loop within the IPv4 and IPv6 stack.
> ...
> > There is a simple local solution that is used by gif_output() that is not
> > protected by any mutex:
> ..
> > if (++called > max_gif_nesting) {
> > log(LOG_NOTICE,
> > "gif_output: recursively called too many times(%d)\n",
> > called);
> > m_freem(m);
> > error = EIO; /* is there better errno? */
> > goto end;
> > }
> >
> > I am wondering if a more generic solution could be found, however I do not
> > have any idea yet ;-(Since we now have m_tag support, we could implement the solution OpenBSD uses which catches actual loops instead of just refusing to nest more then a certain amount. See sys/net/if_gif.c rev 1.19. -- Brooks -- Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4
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