diff options
Diffstat (limited to 'src/resolve/resolved-dns-transaction.c')
| -rw-r--r-- | src/resolve/resolved-dns-transaction.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c index 0e09a339aa..4398c2cb99 100644 --- a/src/resolve/resolved-dns-transaction.c +++ b/src/resolve/resolved-dns-transaction.c @@ -418,7 +418,22 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) { case DNS_PROTOCOL_DNS: assert(t->server); - dns_server_packet_received(t->server, t->current_features, ts - t->start_usec); + if (IN_SET(DNS_PACKET_RCODE(p), DNS_RCODE_FORMERR, DNS_RCODE_SERVFAIL, DNS_RCODE_NOTIMP)) { + + /* request failed, immediately try again with reduced features */ + log_debug("Server returned error: %s", dns_rcode_to_string(DNS_PACKET_RCODE(p))); + + dns_server_packet_failed(t->server, t->current_features); + + r = dns_transaction_go(t); + if (r < 0) { + dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES); + return; + } + + return; + } else + dns_server_packet_received(t->server, t->current_features, ts - t->start_usec); break; case DNS_PROTOCOL_LLMNR: |