return 1; /* > 0 means: we have some gateway */
}
-static int synthesize_gateway_ptr(Manager *m, int af, const union in_addr_union *address, int ifindex, DnsAnswer **answer) {
+static int synthesize_dns_stub_rr(
+ Manager *m,
+ const DnsResourceKey *key,
+ in_addr_t addr,
+ DnsAnswer **answer) {
+
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
+ int r;
+
+ assert(m);
+ assert(key);
+ assert(answer);
+
+ if (!IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_ANY))
+ return 1; /* we still consider ourselves the owner of this name */
+
+ r = dns_answer_reserve(answer, 1);
+ if (r < 0)
+ return r;
+
+ rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, dns_resource_key_name(key));
+ if (!rr)
+ return -ENOMEM;
+
+ rr->a.in_addr.s_addr = htobe32(addr);
+
+ r = dns_answer_add(*answer, rr, LOOPBACK_IFINDEX, DNS_ANSWER_AUTHENTICATED, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int synthesize_dns_stub_ptr(
+ Manager *m,
+ int af,
+ const union in_addr_union *address,
+ DnsAnswer **answer) {
+
+ int r;
+
+ assert(m);
+ assert(address);
+ assert(answer);
+
+ if (af != AF_INET)
+ return 0;
+
+ if (address->in.s_addr == htobe32(INADDR_DNS_STUB)) {
+
+ r = dns_answer_reserve(answer, 1);
+ if (r < 0)
+ return r;
+
+ r = answer_add_ptr(answer, "53.0.0.127.in-addr.arpa", "_localdnsstub", LOOPBACK_IFINDEX, DNS_ANSWER_AUTHENTICATED);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ if (address->in.s_addr == htobe32(INADDR_DNS_PROXY_STUB)) {
+
+ r = dns_answer_reserve(answer, 1);
+ if (r < 0)
+ return r;
+
+ r = answer_add_ptr(answer, "54.0.0.127.in-addr.arpa", "_localdnsproxy", LOOPBACK_IFINDEX, DNS_ANSWER_AUTHENTICATED);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ return 0;
+}
+
+static int synthesize_gateway_ptr(
+ Manager *m,
+ int af,
+ const union in_addr_union *address,
+ int ifindex,
+ DnsAnswer **answer) {
+
_cleanup_free_ struct local_address *addresses = NULL;
int n;
continue;
}
- } else if ((dns_name_endswith(name, "127.in-addr.arpa") > 0 && dns_name_equal(name, "2.0.0.127.in-addr.arpa") == 0) ||
+ } else if (is_dns_stub_hostname(name)) {
+
+ r = synthesize_dns_stub_rr(m, key, INADDR_DNS_STUB, &answer);
+ if (r < 0)
+ return log_error_errno(r, "Failed to synthesize local DNS stub RRs: %m");
+
+ } else if (is_dns_proxy_stub_hostname(name)) {
+
+ r = synthesize_dns_stub_rr(m, key, INADDR_DNS_PROXY_STUB, &answer);
+ if (r < 0)
+ return log_error_errno(r, "Failed to synthesize local DNS stub RRs: %m");
+
+ } else if ((dns_name_endswith(name, "127.in-addr.arpa") > 0 &&
+ dns_name_equal(name, "2.0.0.127.in-addr.arpa") == 0 &&
+ dns_name_equal(name, "53.0.0.127.in-addr.arpa") == 0 &&
+ dns_name_equal(name, "54.0.0.127.in-addr.arpa") == 0) ||
dns_name_equal(name, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa") > 0) {
r = synthesize_localhost_ptr(m, key, &answer);
return log_error_errno(r, "Failed to synthesize localhost PTR RRs: %m");
} else if (dns_name_address(name, &af, &address) > 0) {
- int v, w;
+ int v, w, u;
if (getenv_bool("SYSTEMD_RESOLVED_SYNTHESIZE_HOSTNAME") == 0)
continue;
if (w < 0)
return log_error_errno(w, "Failed to synthesize gateway hostname PTR RR: %m");
- if (v == 0 && w == 0) /* This IP address is neither a local one nor a gateway */
+ u = synthesize_dns_stub_ptr(m, af, &address, &answer);
+ if (u < 0)
+ return log_error_errno(u, "Failed to synthesize local stub hostname PTR PR: %m");
+
+ if (v == 0 && w == 0 && u == 0) /* This IP address is neither a local one, nor a gateway, nor a stub address */
continue;
/* Note that we never synthesize reverse PTR for _outbound, since those are local