diff options
Diffstat (limited to 'src/resolve/resolved-dns-transaction.c')
| -rw-r--r-- | src/resolve/resolved-dns-transaction.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c index 9ff8145ac1..43ee783ba9 100644 --- a/src/resolve/resolved-dns-transaction.c +++ b/src/resolve/resolved-dns-transaction.c @@ -432,6 +432,13 @@ static int on_stream_complete(DnsStream *s, int error) { if (ERRNO_IS_DISCONNECT(error)) { usec_t usec; + if (t->scope->protocol == DNS_PROTOCOL_LLMNR) { + /* If the LLMNR/TCP connection failed, the host doesn't support LLMNR, and we cannot answer the + * question on this scope. */ + dns_transaction_complete(t, DNS_TRANSACTION_NOT_FOUND); + return 0; + } + log_debug_errno(error, "Connection failure for DNS TCP stream: %m"); assert_se(sd_event_now(t->scope->manager->event, clock_boottime_or_monotonic(), &usec) >= 0); dns_server_packet_lost(t->server, IPPROTO_TCP, t->current_feature_level, usec - t->start_usec); @@ -1463,6 +1470,12 @@ int dns_transaction_go(DnsTransaction *t) { dns_transaction_complete(t, DNS_TRANSACTION_RR_TYPE_UNSUPPORTED); return 0; } + if (t->scope->protocol == DNS_PROTOCOL_LLMNR && ERRNO_IS_DISCONNECT(-r)) { + /* On LLMNR, if we cannot connect to a host via TCP when doing revers lookups. This means we cannot + * answer this request with this protocol. */ + dns_transaction_complete(t, DNS_TRANSACTION_NOT_FOUND); + return 0; + } if (r < 0) { if (t->scope->protocol != DNS_PROTOCOL_DNS) { dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES); @@ -2989,6 +3002,7 @@ static const char* const dns_transaction_state_table[_DNS_TRANSACTION_STATE_MAX] [DNS_TRANSACTION_NO_TRUST_ANCHOR] = "no-trust-anchor", [DNS_TRANSACTION_RR_TYPE_UNSUPPORTED] = "rr-type-unsupported", [DNS_TRANSACTION_NETWORK_DOWN] = "network-down", + [DNS_TRANSACTION_NOT_FOUND] = "not-found", }; DEFINE_STRING_TABLE_LOOKUP(dns_transaction_state, DnsTransactionState); |