On 5 mei 2011, at 19:41, Gerald Combs wrote: > On 5/5/11 6:01 AM, Jakub Zawadzki wrote: >> On Thu, May 05, 2011 at 02:01:06PM +0200, Jakub Zawadzki wrote: >>> IMHO when IPv4-mapping is used the longest address is: >>> ::ffff:255.255.255.255 (22B) >>> >>> Anyone knows inet_ntop(AF_INET6, ..) implementation which can actually use >>> 46 bytes? >> >> Maybe some inet_ntop() implementation don't generate short addresses? (0000 >> instead of ::) >> so ipv4 mapped address would be: >> "0000:0000:0000:0000:0000:0000:255.255.255.255" >> >> I think I'll just copy inet_ntop6() from wsutil/inet_ntop.c to >> address_to_str.c... > > RFC 2553 section 6.6 and MSDN's InetNtop documentation both specify 46 > characters, but you'd think that if an implementation was smart enough > to check for v4-mapped addresses it would be smart enough to compress > zeroes.
There is also the "IPv6 mixed notation" (or "Trailing dotted decimal notation" as Microsoft calls it) which displays the last 32 bits of a (general) IPv6 address in dotted decimal. This could indeed lead to 45 byte strings: IE 2001:db8:1234:5678:9abc:def0:192.168.123.234 (OK, this is 44 bytes, but I wanted to stick to the 2001:db8::/32 example prefix) Cheers, Sake ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <[email protected]> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:[email protected]?subject=unsubscribe
