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resolved: if ipv6 is off patch hostname→address query with unspec family to ipv4

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If the client never specified the address family, and IPv6 is off in the
kernel, then look only for A, never for AAAA RRs.

Fixes: #23951
(cherry picked from commit 0438aa57751559295fee86d1c1f176486e518455)
(cherry picked from commit 4e3ae43282c0ae47b6affad44554421f0c9b9b1f)
(cherry picked from commit d3763dafca3e4fa3def71096b306809897f042c5)
This commit is contained in:
Lennart Poettering 2023-06-22 22:26:23 +02:00 committed by Luca Boccassi
parent 56575054bd
commit 53343728a6
1 changed files with 6 additions and 0 deletions
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6
src/resolve/resolved-dns-question.c
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@ -4,6 +4,7 @@
#include "dns-domain.h"
#include "dns-type.h"
#include "resolved-dns-question.h"
#include "socket-util.h"
DnsQuestion *dns_question_new(size_t n) {
DnsQuestion *q;
@ -304,6 +305,11 @@ int dns_question_new_address(DnsQuestion **ret, int family, const char *name, bo
if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC))
return -EAFNOSUPPORT;
/* If IPv6 is off and the request has an unspecified lookup family, restrict it automatically to
* IPv4. */
if (family == AF_UNSPEC && !socket_ipv6_is_enabled())
family = AF_INET;
if (convert_idna) {
r = dns_name_apply_idna(name, &buf);
if (r < 0)