Mercurial > hg > nginx
view contrib/geo2nginx.pl @ 9179:ea1f29c2010c
HTTP/2: fixed buffer management with HTTP/2 auto-detection.
As part of normal HTTP/2 processing, incomplete frames are saved in the
control state using a fixed size memcpy of NGX_HTTP_V2_STATE_BUFFER_SIZE.
For this matter, two state buffers are reserved in the HTTP/2 recv buffer.
As part of HTTP/2 auto-detection on plain TCP connections, initial data
is first read into a buffer specified by the client_header_buffer_size
directive that doesn't have state reservation. Previously, this made it
possible to over-read the buffer as part of saving the state.
The fix is to read the available buffer size rather than a fixed size.
Although memcpy of a fixed size can produce a better optimized code,
handling of incomplete frames isn't a common execution path, so it was
sacrificed for the sake of simplicity of the fix.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Sat, 21 Oct 2023 18:48:24 +0400 |
parents | c9ad0d9c7d59 |
children |
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#!/usr/bin/perl -w # (c) Andrei Nigmatulin, 2005 # # this script provided "as is", without any warranties. use it at your own risk. # # special thanx to Andrew Sitnikov for perl port # # this script converts CSV geoip database (free download at http://www.maxmind.com/app/geoip_country) # to format, suitable for use with nginx_http_geo module (http://sysoev.ru/nginx) # # for example, line with ip range # # "62.16.68.0","62.16.127.255","1041253376","1041268735","RU","Russian Federation" # # will be converted to four subnetworks: # # 62.16.68.0/22 RU; # 62.16.72.0/21 RU; # 62.16.80.0/20 RU; # 62.16.96.0/19 RU; use warnings; use strict; while( <STDIN> ){ if (/"[^"]+","[^"]+","([^"]+)","([^"]+)","([^"]+)"/){ print_subnets($1, $2, $3); } } sub print_subnets { my ($a1, $a2, $c) = @_; my $l; while ($a1 <= $a2) { for ($l = 0; ($a1 & (1 << $l)) == 0 && ($a1 + ((1 << ($l + 1)) - 1)) <= $a2; $l++){}; print long2ip($a1) . "/" . (32 - $l) . " " . $c . ";\n"; $a1 += (1 << $l); } } sub long2ip { my $ip = shift; my $str = 0; $str = ($ip & 255); $ip >>= 8; $str = ($ip & 255).".$str"; $ip >>= 8; $str = ($ip & 255).".$str"; $ip >>= 8; $str = ($ip & 255).".$str"; }