mod_http: Fix IP address normalization (Thanks Boris) This fixes the problem that an un-bracketed IPv6 address will not match the first pattern (since it matches brackets) and instead the first decimal digits will match the pattern meant to strip port numbers from IPv4 addresses, e.g. 2001:db8::1 --> 2000 This pattern instead matches enough of a regular IPv4 address to make an IPv6 address fall back to the last case.

author: Kim Alvefur <zash@zash.se>
date: Wed, 09 Apr 2025 15:54:54 +0200 (6 weeks ago)
parent: 13249:5884d58707fa
child: 13835:a4b58ea5bf7b
--- a/plugins/mod_http.lua	Wed Apr 09 15:06:48 2025 +0200
+++ b/plugins/mod_http.lua	Wed Apr 09 15:54:54 2025 +0200
@@ -331,7 +331,7 @@
 
 --- deal with [ipv6]:port / ip:port format
 local function normal_ip(ip)
-	return ip:match("^%[([%x:]*)%]") or ip:match("^([%d.]+)") or ip;
+	return ip:match("^%[([%x:]*)%]") or ip:match("^%d+%.%d+%.%d+%.%d+") or ip;
 end
 
 local function is_trusted_proxy(ip)