On Sun, 31 Dec 2000, YOSHIFUJI Hideaki / [iso-2022-jp] [EMAIL PROTECTED](B wrote:
> In article <[EMAIL PROTECTED]> (at Sun, 31 Dec 2000 13:13:43 +0100 (CET)), > Jeroen Massar <[EMAIL PROTECTED]> says: > > > Though on most UNIX'es (using KAME at least) listening on IPv6 will > > also listen on IPv4, On FreeBSD: > > 8<---- > > tcp46 0 0 *.domain *.* LISTEN > > ------>8 > > On freebsd3 and later. freebsd2 behaves differently. Great huh... they simply did that to confuse the programmers. This really is one of the many headaches one gets programming for UNIX'es. > > > > * This version also checks for addresses that are actually IPv4. > > * eg. ::ffff:10:100:13:66 or 0:0:0:0:0:ffff:10.100.13.66 is actualy the > ~~~~~~~~~~~~~~~~~~~ ::ffff:10.100.13.66 > > * the IPv6 notation for 10.100.13.66 in IPv4. > > > > This info is also needed when one needs to due reverse lookups because > > IPv4 reverse's are in the "in-addr.arpa" domain and the IPv6 reverses are > > in the "ip6.int" domain, noting that the ::ffff range isn't reverse mapped > > into the in-addr.arpa part... > > getnameinfo() (and gethostbyaddr()) do this automatically. Not if you want your own dns resolving because you need the asynchronous lookups, which is like quite common in ircd's. Greets, Jeroen
