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Allowed square brackets with portless IPv6 address.

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In several places in nginx, when an address with an optional port is
expected, IPv6 address could be specified without square brackets and
without port, as well as both with the brackets and port.  The change
allows IPv6 in square brackets and no port, which was previously
considered an error.

As a reference, this format is also allowed by RFC 9110 for the "Host"
header, and by RFC 7239 for "Forwarded by/for".

The change affects headers parsing in ngx_http_realip_module, as well as
proxy_bind and friends.
This commit is contained in:
Roman Arutyunyan 2024-11-11 22:28:30 +04:00
parent d10bf73eba
commit 69cabd1be9
1 changed files with 5 additions and 1 deletions
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6
src/core/ngx_inet.c
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@ -639,7 +639,11 @@ ngx_parse_addr_port(ngx_pool_t *pool, ngx_addr_t *addr, u_char *text,
p = ngx_strlchr(text, last, ']');
if (p == NULL || p == last - 1 || *++p != ':') {
if (p == last - 1) {
return ngx_parse_addr(pool, addr, text + 1, len - 2);
}
if (p == NULL || *++p != ':') {
return NGX_DECLINED;
}