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| author | Leonid Lisovskiy <lly.dev@gmail.com> | 2015-12-28 20:17:08 +0300 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-01-02 16:57:03 +0100 |
| commit | bad1263e3316825b5ef0037ad7a897ae62a30d7e (patch) | |
| tree | 034cf7c3dd94f3ead8c9d9492400711aba0c66c8 /utils/bswap.h | |
| parent | 86387d4eb3e8e6f97ab8b7f0e2d6988ed0e62e48 (diff) | |
inet/getaddrinfo: simplest /etc/gai.conf to control IPv6/IPv4 addresses sort order
Implement simplest variant of /etc/gai.conf to control getaddrinfo
IPv6/IPv4 addresses sorting. Keep the default sort order - IPv6 first,
IPv4 second. To invert it, create /etc/gai.conf containing single line:
precedence ::ffff:0:0/96 100
Example before:
$ nslookup security.debian.org 8.8.8.8
Server: 8.8.8.8
Address 1: 8.8.8.8 google-public-dns-a.google.com
Name: security.debian.org
Address 1: 2001:a78:5:0:216:35ff:fe7f:be4f villa.debian.org
Address 2: 2001:a78:5:1:216:35ff:fe7f:6ceb lobos.debian.org
Address 3: 195.20.242.89 wieck.debian.org
Address 4: 212.211.132.250 lobos.debian.org
Address 5: 212.211.132.32 villa.debian.org
After patch & precedence set in /etc/gai.conf:
$ nslookup security.debian.org 8.8.8.8
Server: 8.8.8.8
Address 1: 8.8.8.8 google-public-dns-a.google.com
Name: security.debian.org
Address 1: 195.20.242.89 wieck.debian.org
Address 2: 212.211.132.250 lobos.debian.org
Address 3: 212.211.132.32 villa.debian.org
Address 4: 2001:a78:5:0:216:35ff:fe7f:be4f villa.debian.org
Address 5: 2001:a78:5:1:216:35ff:fe7f:6ceb lobos.debian.org
bloat-o-meter report:
function old new delta
getaddrinfo 726 1138 +412
gaih_inet 2660 2692 +32
.rodata 16618 16643 +25
__gai_precedence - 1 +1
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 882/0) Total: 470 bytes
Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com>
Diffstat (limited to 'utils/bswap.h')
0 files changed, 0 insertions, 0 deletions