I have some comments on draft-chakrabarti-ipv6-addrselect-api-01.txt.
1. I'm puzzled by the following IPV6_SRC_PREFERENCES settings:
IPV6_PREFER_SRC_TUNNEL /* Prefer tunnel interface as source */
IPV6_PREFER_SRC_NATIVE /* Prefer native IPv6 source addr */
IPV6_PREFER_SRC_LARGESTSCOPE /* Prefer largest scope source */
IPV6_PREFER_SRC_LOWERSCOPE /* Prefer less than largest scope */
What do they mean? It would be nice if there was a description of
what source address selection rules they affect and how. One point of
confusion is that there are no source address selection rules that
have to do with tunnel vs. native addresses, so I can't really guess
what was intended here. The second pair, largest vs. lower, are
confusing. There is a "Prefer appropriate scope" source address
selection rule, but neither of these constants represents the
"default" behavior for that rule. What was intended here? I'm
guessing that this was an error and that these four settings shouldn't
exist...
2. Some of the AI_ flags have strange names. Here's what I mean:
AI_PREFER_SRC_LARGESTSCOPE
I'm guessing you meant AI_PREFER_DST_LARGESTSCOPE since this settings
presumably alters the "Prefer smaller scope" destination address
selection rule...?
AI_PREFER_SRC_LOWERSCOPE
Same. Also, why is this "LOWER" instead of "LOWEST"? Its buddy is
"LARGEST".
AI_PREFER_SRC_TUNNEL
I'm also guessing that you mean AI_PREFER_DST_TUNNEL, as this setting
presumably alters the "Prefer native transport" destination address
selection rule...?
AI_PREFER_SRC_NATIVE
Same.
3. There is no explicit text on what an implementation should do if they
don't support Mobile IPv6 or CGA addresses. Should they define these
socket option constants and ignore them if set, or should they return
EINVAL if set? Same question for the AI_* flags for getaddrinfo()...
My inclination would be to define them, but ignore them when set on
such implementations.
Thanks,
-Seb
--------------------------------------------------------------------
IETF IPng Working Group Mailing List
IPng Home Page: http://playground.sun.com/ipng
FTP archive: ftp://playground.sun.com/pub/ipng
Direct all administrative requests to [EMAIL PROTECTED]
--------------------------------------------------------------------
