On 11/11/05, Albert Chin <[EMAIL PROTECTED]> wrote:
> From print-isoclns.c:
> static int
> isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident,
> u_int16_t afi) {
> char ident_buffer[20];
> u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for
> IPv4 and IPv6 prefixes */
>
> The prefix definition isn't wrapped in an #ifdef INET6. Ditto for this
> line in the same file:
> memset(prefix, 0, sizeof(struct in6_addr)); /* clear the copy
> buffer */
>
I would say this code (without looking further) does the buffering for
both IPv4 and IPv6 (there is a comment saying that!).
It uses the in6_addr structure because that would be bigger than IPv4
so could hold both. Saves having two different parts of code doing
basically the same thing. There would probably be a cast when it is
used if being used by IPv4.
Ian
--
Ian McDonald
http://wand.net.nz/~iam4
WAND Network Research Group
University of Waikato
New Zealand
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