50-udev-default.rules.in: set correct group for mediaX/cecX (#5921)

[thirdparty/systemd.git] / src / resolve / resolved-dns-transaction.h

diff --git a/src/resolve/resolved-dns-transaction.h b/src/resolve/resolved-dns-transaction.h
index 76cf6e71dba121b12af65dfdf3e379e06a57fc73..a8d97738efcd89fc70788dd15b037fe2c1253bc0 100644 (file)
--- a/src/resolve/resolved-dns-transaction.h
+++ b/src/resolve/resolved-dns-transaction.h
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
 #pragma once
 
 /***
@@ -35,11 +33,13 @@ enum DnsTransactionState {
         DNS_TRANSACTION_TIMEOUT,
         DNS_TRANSACTION_ATTEMPTS_MAX_REACHED,
         DNS_TRANSACTION_INVALID_REPLY,
-        DNS_TRANSACTION_RESOURCES,
+        DNS_TRANSACTION_ERRNO,
         DNS_TRANSACTION_ABORTED,
         DNS_TRANSACTION_DNSSEC_FAILED,
         DNS_TRANSACTION_NO_TRUST_ANCHOR,
         DNS_TRANSACTION_RR_TYPE_UNSUPPORTED,
+        DNS_TRANSACTION_NETWORK_DOWN,
+        DNS_TRANSACTION_NOT_FOUND, /* like NXDOMAIN, but when LLMNR/TCP connections fail */
         _DNS_TRANSACTION_STATE_MAX,
         _DNS_TRANSACTION_STATE_INVALID = -1
 };
@@ -59,12 +59,13 @@ enum DnsTransactionSource {
 #include "resolved-dns-packet.h"
 #include "resolved-dns-question.h"
 #include "resolved-dns-scope.h"
+#include "resolved-dns-server.h"
+#include "resolved-dns-stream.h"
 
 struct DnsTransaction {
         DnsScope *scope;
 
         DnsResourceKey *key;
-        char *key_string;
 
         DnsTransactionState state;
 
@@ -75,6 +76,10 @@ struct DnsTransaction {
         bool initial_jitter_scheduled:1;
         bool initial_jitter_elapsed:1;
 
+        bool clamp_ttl:1;
+
+        bool probing:1;
+
         DnsPacket *sent, *received;
 
         DnsAnswer *answer;
@@ -82,6 +87,7 @@ struct DnsTransaction {
         DnssecResult answer_dnssec_result;
         DnsTransactionSource answer_source;
         uint32_t answer_nsec_ttl;
+        int answer_errno; /* if state is DNS_TRANSACTION_ERRNO */
 
         /* Indicates whether the primary answer is authenticated,
          * i.e. whether the RRs from answer which directly match the
@@ -115,20 +121,23 @@ struct DnsTransaction {
         /* The features of the DNS server at time of transaction start */
         DnsServerFeatureLevel current_feature_level;
 
+        /* If we got SERVFAIL back, we retry the lookup, using a lower feature level than we used before. */
+        DnsServerFeatureLevel clamp_feature_level;
+
         /* Query candidates this transaction is referenced by and that
          * shall be notified about this specific transaction
          * completing. */
-        Set *notify_query_candidates;
+        Set *notify_query_candidates, *notify_query_candidates_done;
 
         /* Zone items this transaction is referenced by and that shall
          * be notified about completion. */
-        Set *notify_zone_items;
+        Set *notify_zone_items, *notify_zone_items_done;
 
         /* Other transactions that this transactions is referenced by
          * and that shall be notified about completion. This is used
          * when transactions want to validate their RRsets, but need
          * another DNSKEY or DS RR to do so. */
-        Set *notify_transactions;
+        Set *notify_transactions, *notify_transactions_done;
 
         /* The opposite direction: the transactions this transaction
          * created in order to request DNSKEY or DS RRs. */
@@ -152,8 +161,6 @@ void dns_transaction_notify(DnsTransaction *t, DnsTransaction *source);
 int dns_transaction_validate_dnssec(DnsTransaction *t);
 int dns_transaction_request_dnssec_keys(DnsTransaction *t);
 
-const char *dns_transaction_key_string(DnsTransaction *t);
-
 const char* dns_transaction_state_to_string(DnsTransactionState p) _const_;
 DnsTransactionState dns_transaction_state_from_string(const char *s) _pure_;
 
@@ -167,10 +174,20 @@ DnsTransactionSource dns_transaction_source_from_string(const char *s) _pure_;
 #define MDNS_JITTER_MIN_USEC   (20 * USEC_PER_MSEC)
 #define MDNS_JITTER_RANGE_USEC (100 * USEC_PER_MSEC)
 
+/* mDNS probing interval, see RFC 6762 Section 8.1 */
+#define MDNS_PROBING_INTERVAL_USEC (250 * USEC_PER_MSEC)
+
 /* Maximum attempts to send DNS requests, across all DNS servers */
-#define DNS_TRANSACTION_ATTEMPTS_MAX 16
+#define DNS_TRANSACTION_ATTEMPTS_MAX 24
 
 /* Maximum attempts to send LLMNR requests, see RFC 4795 Section 2.7 */
 #define LLMNR_TRANSACTION_ATTEMPTS_MAX 3
 
-#define TRANSACTION_ATTEMPTS_MAX(p) ((p) == DNS_PROTOCOL_LLMNR ? LLMNR_TRANSACTION_ATTEMPTS_MAX : DNS_TRANSACTION_ATTEMPTS_MAX)
+/* Maximum attempts to send MDNS requests, see RFC 6762 Section 8.1 */
+#define MDNS_TRANSACTION_ATTEMPTS_MAX 3
+
+#define TRANSACTION_ATTEMPTS_MAX(p) (((p) == DNS_PROTOCOL_LLMNR) ? \
+                                         LLMNR_TRANSACTION_ATTEMPTS_MAX : \
+                                         (((p) == DNS_PROTOCOL_MDNS) ? \
+                                             MDNS_TRANSACTION_ATTEMPTS_MAX : \
+                                             DNS_TRANSACTION_ATTEMPTS_MAX))