1# Configuration for getaddrinfo(3).
2#
3# So far only configuration for the destination address sorting is needed.
4# RFC 3484 governs the sorting.  But the RFC also says that system
5# administrators should be able to overwrite the defaults.  This can be
6# achieved here.
7#
8# All lines have an initial identifier specifying the option followed by
9# up to two values.  Information specified in this file replaces the
10# default information.  Complete absence of data of one kind causes the
11# appropriate default information to be used.  The supported commands include:
12#
13# reload  <yes|no>
14#    If set to yes, each getaddrinfo(3) call will check whether this file
15#    changed and if necessary reload.  This option should not really be
16#    used.  There are possible runtime problems.  The default is no.
17#
18# label   <mask>   <value>
19#    Add another rule to the RFC 3484 label table.  See section 2.1 in
20#    RFC 3484.  The default is:
21#
22#label ::1/128       0
23#label ::/0          1
24#label 2002::/16     2
25#label ::/96         3
26#label ::ffff:0:0/96 4
27#label fec0::/10     5
28#label fc00::/7      6
29#label 2001:0::/32   7
30#
31#    This default differs from the tables given in RFC 3484 by handling
32#    (now obsolete) site-local IPv6 addresses and Unique Local Addresses.
33#    The reason for this difference is that these addresses are never
34#    NATed while IPv4 site-local addresses most probably are.  Given
35#    the precedence of IPv6 over IPv4 (see below) on machines having only
36#    site-local IPv4 and IPv6 addresses a lookup for a global address would
37#    see the IPv6 be preferred.  The result is a long delay because the
38#    site-local IPv6 addresses cannot be used while the IPv4 address is
39#    (at least for the foreseeable future) NATed.  We also treat Teredo
40#    tunnels special.
41#
42# precedence  <mask>   <value>
43#    Add another rule to the RFC 3484 precedence table.  See section 2.1
44#    and 10.3 in RFC 3484.  The default is:
45#
46#precedence  ::1/128       50
47#precedence  ::/0          40
48#precedence  2002::/16     30
49#precedence ::/96          20
50#precedence ::ffff:0:0/96  10
51#
52#    For sites which prefer IPv4 connections change the last line to
53#
54#precedence ::ffff:0:0/96  100
55
56#
57# scopev4  <mask>  <value>
58#    Add another rule to the RFC 6724 scope table for IPv4 addresses.
59#    By default the scope IDs described in section 3.2 in RFC 6724 are
60#    used.  Changing these defaults should hardly ever be necessary.
61#    The defaults are equivalent to:
62#
63#scopev4 ::ffff:169.254.0.0/112  2
64#scopev4 ::ffff:127.0.0.0/104    2
65#scopev4 ::ffff:0.0.0.0/96       14
66