CVS log for src/sys/netinet6/scope6_var.h

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s/embbeded/embedded/.

remove unused

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PR/52472: Edgar Fuss: Document handling of scoped IPv6 addresses by embedding
ASCII art from:
	IPv6 Core Protocols Implementation
	By Qing Li, Tatuya Jinmei, Keiichi Shima
	Page 56, Figure 2.12

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printable version of the scope.
remove stray breaks.

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Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.

Replace rote sockaddr_in6 initializations (memset(), set sa6_family,
sa6_len, and sa6_add) with sockaddr_in6_init() calls.

De-__P().  Constify.  KNF.  Shorten a staircase.  Change bcmp() to
memcmp().

Extract subroutine in6_setzoneid() from in6_setscope(), for re-use
soon.

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file scope6_var.h was added on branch yamt-lazymbuf on 2006-06-21 15:11:09 +0000

file scope6_var.h was added on branch yamt-uio_vmspace on 2006-02-01 14:52:42 +0000

Better support of IPv6 scoped addresses.

- most of the kernel code will not care about the actual encoding of
  scope zone IDs and won't touch "s6_addr16[1]" directly.
- similarly, most of the kernel code will not care about link-local
  scoped addresses as a special case.
- scope boundary check will be stricter.  For example, the current
  *BSD code allows a packet with src=::1 and dst=(some global IPv6
  address) to be sent outside of the node, if the application do:
    s = socket(AF_INET6);
    bind(s, "::1");
    sendto(s, some_global_IPv6_addr);
  This is clearly wrong, since ::1 is only meaningful within a single
  node, but the current implementation of the *BSD kernel cannot
  reject this attempt.
- and, while there, don't try to remove the ff02::/32 interface route
  entry in in6_ifdetach() as it's already gone.

This also includes some level of support for the standard source
address selection algorithm defined in RFC3484, which will be
completed on in the future.

From the KAME project via JINMEI Tatuya.
Approved by core@.