Here's something simple to get started. IP6addr_t is added as a typedef
(for consistency with IPaddr_t). I ended up borrowing and adapting the
vsprintf code from Linux.
Here is an example of the printf formatting
With this code
IP6addr_t addr6 = {.u6_addr16[0] = 0x3ffe,
.u6_addr16[1] = 0x1234,
.u6_addr16[7] = 0x0001};
IPaddr_t addr4 = 0x7f01;
printf("addr6=%pi6\n", &addr6);
printf("addr6=%pI6\n", &addr6);
printf("addr6=%pI6c\n", &addr6);
printf("addr=%pI4\n", &addr4);
We get the output
addr6=3ffe12340001
addr6=3ffe:1234::::::0001
addr6=3ffe:1234::1
addr4=127.0.0.1
My work so far on this has raised a few questions:
1) Presumably the majority of the actual V6 code would be included by a
config option (CONFIG_IPV6). How far should I take that? Should the
vsprintf code be conditional?
2) Our current out of tree code parallels net.c and net.h. Should I
continue this for the final version or integrate it into net.[ch].
3) rxhand_f currently takes an IPaddr_t. I haven't looked at the usage
of this yet but to support V6 this may need to be a new union or a void
*.
(note on my split personality, I use a gmail account to post to the
u-boot mailing list but since this work is being done as part of my
$dayjob the author and s-o-b are using my work email address)
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