resolved: add missing error code check when initializing DNS-over-TLS

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

diff --git a/src/resolve/resolved-dns-stream.h b/src/resolve/resolved-dns-stream.h
index 5542e9e2ba92225d5eb2c368eba54a9e4eb90479..780051b38a419ae5e6e25cff5adf4b7b7de2fb52 100644 (file)
--- a/src/resolve/resolved-dns-stream.h
+++ b/src/resolve/resolved-dns-stream.h
@@ -1,24 +1,28 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
-/***
-  This file is part of systemd.
-
-  Copyright 2014 Lennart Poettering
-***/
-
 #include "socket-util.h"
 
 typedef struct DnsStream DnsStream;
 
+typedef enum DnsStreamType {
+        DNS_STREAM_LOOKUP,        /* Outgoing connection to a classic DNS server */
+        DNS_STREAM_LLMNR_SEND,    /* Outgoing LLMNR TCP lookup */
+        DNS_STREAM_LLMNR_RECV,    /* Incoming LLMNR TCP lookup */
+        DNS_STREAM_STUB,          /* Incoming DNS stub connection */
+        _DNS_STREAM_TYPE_MAX,
+        _DNS_STREAM_TYPE_INVALID = -1,
+} DnsStreamType;
+
 #include "resolved-dns-packet.h"
 #include "resolved-dns-transaction.h"
 #include "resolved-manager.h"
-
-#if HAVE_GNUTLS
-#include <gnutls/gnutls.h>
+#if ENABLE_DNS_OVER_TLS
+#include "resolved-dnstls.h"
 #endif
 
+#define DNS_STREAM_WRITE_TLS_DATA 1
+
 /* Streams are used by three subsystems:
  *
  *   1. The normal transaction logic when doing a DNS or LLMNR lookup via TCP
@@ -28,8 +32,9 @@ typedef struct DnsStream DnsStream;
 
 struct DnsStream {
         Manager *manager;
-        int n_ref;
+        unsigned n_ref;
 
+        DnsStreamType type;
         DnsProtocol protocol;
 
         int fd;
@@ -45,10 +50,9 @@ struct DnsStream {
         union sockaddr_union tfo_address;
         socklen_t tfo_salen;
 
-#if HAVE_GNUTLS
-        gnutls_session_t tls_session;
-        int tls_handshake;
-        bool tls_bye;
+#if ENABLE_DNS_OVER_TLS
+        DnsTlsStreamData dnstls_data;
+        int dnstls_events;
 #endif
 
         sd_event_source *io_event_source;
@@ -59,13 +63,12 @@ struct DnsStream {
         size_t n_written, n_read;
         OrderedSet *write_queue;
 
-        int (*on_connection)(DnsStream *s);
         int (*on_packet)(DnsStream *s);
         int (*complete)(DnsStream *s, int error);
 
         LIST_HEAD(DnsTransaction, transactions); /* when used by the transaction logic */
         DnsServer *server;                       /* when used by the transaction logic */
-        DnsQuery *query;             /* when used by the DNS stub logic */
+        Set *queries;                            /* when used by the DNS stub logic */
 
         /* used when DNS-over-TLS is enabled */
         bool encrypted:1;
@@ -73,9 +76,9 @@ struct DnsStream {
         LIST_FIELDS(DnsStream, streams);
 };
 
-int dns_stream_new(Manager *m, DnsStream **s, DnsProtocol protocol, int fd, const union sockaddr_union *tfo_address);
-#if HAVE_GNUTLS
-int dns_stream_connect_tls(DnsStream *s, gnutls_session_t tls_session);
+int dns_stream_new(Manager *m, DnsStream **s, DnsStreamType type, DnsProtocol protocol, int fd, const union sockaddr_union *tfo_address);
+#if ENABLE_DNS_OVER_TLS
+int dns_stream_connect_tls(DnsStream *s, void *tls_session);
 #endif
 DnsStream *dns_stream_unref(DnsStream *s);
 DnsStream *dns_stream_ref(DnsStream *s);
@@ -83,6 +86,7 @@ DnsStream *dns_stream_ref(DnsStream *s);
 DEFINE_TRIVIAL_CLEANUP_FUNC(DnsStream*, dns_stream_unref);
 
 int dns_stream_write_packet(DnsStream *s, DnsPacket *p);
+ssize_t dns_stream_writev(DnsStream *s, const struct iovec *iov, size_t iovcnt, int flags);
 
 static inline bool DNS_STREAM_QUEUED(DnsStream *s) {
         assert(s);
@@ -92,3 +96,7 @@ static inline bool DNS_STREAM_QUEUED(DnsStream *s) {
 
         return !!s->write_packet;
 }
+
+DnsPacket *dns_stream_take_read_packet(DnsStream *s);
+
+void dns_stream_detach(DnsStream *s);