resolve: control system hostname synthesis via environment variable

[thirdparty/systemd.git] / src / resolve / resolved-dns-synthesize.c

diff --git a/src/resolve/resolved-dns-synthesize.c b/src/resolve/resolved-dns-synthesize.c
index 9712322a0abccfb596a4dcaf8bb24672322fe8c2..b3442ad90674818f0f6f4410bb1870e525b7055e 100644 (file)
--- a/src/resolve/resolved-dns-synthesize.c
+++ b/src/resolve/resolved-dns-synthesize.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include "alloc-util.h"
+#include "env-util.h"
 #include "hostname-util.h"
 #include "local-addresses.h"
 #include "missing_network.h"
@@ -410,6 +411,8 @@ int dns_synthesize_answer(
 
                 } else if (manager_is_own_hostname(m, name)) {
 
+                        if (getenv_bool("SYSTEMD_RESOLVED_SYNTHESIZE_HOSTNAME") == 0)
+                                continue;
                         r = synthesize_system_hostname_rr(m, key, ifindex, &answer);
                         if (r < 0)
                                 return log_error_errno(r, "Failed to synthesize system hostname RRs: %m");
@@ -444,6 +447,9 @@ int dns_synthesize_answer(
                 } else if (dns_name_address(name, &af, &address) > 0) {
                         int v, w;
 
+                        if (getenv_bool("SYSTEMD_RESOLVED_SYNTHESIZE_HOSTNAME") == 0)
+                                continue;
+
                         v = synthesize_system_hostname_ptr(m, af, &address, ifindex, &answer);
                         if (v < 0)
                                 return log_error_errno(v, "Failed to synthesize system hostname PTR RR: %m");