/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- This file is part of systemd.
-
- Copyright 2014 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
#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 ENABLE_DNS_OVER_TLS
+#include "resolved-dnstls.h"
+#endif
+
+#define DNS_STREAM_WRITE_TLS_DATA 1
/* Streams are used by three subsystems:
*
struct DnsStream {
Manager *manager;
- int n_ref;
+ unsigned n_ref;
+ DnsStreamType type;
DnsProtocol protocol;
int fd;
uint32_t ttl;
bool identified;
+ /* only when using TCP fast open */
+ union sockaddr_union tfo_address;
+ socklen_t tfo_salen;
+
+#if ENABLE_DNS_OVER_TLS
+ DnsTlsStreamData dnstls_data;
+ int dnstls_events;
+#endif
+
sd_event_source *io_event_source;
sd_event_source *timeout_event_source;
be16_t write_size, read_size;
DnsPacket *write_packet, *read_packet;
size_t n_written, n_read;
+ OrderedSet *write_queue;
int (*on_packet)(DnsStream *s);
int (*complete)(DnsStream *s, int error);
- DnsTransaction *transaction; /* when used by the transaction logic */
- DnsQuery *query; /* when used by the DNS stub logic */
+ LIST_HEAD(DnsTransaction, transactions); /* when used by the transaction logic */
+ DnsServer *server; /* when used by the transaction logic */
+ Set *queries; /* when used by the DNS stub logic */
+
+ /* used when DNS-over-TLS is enabled */
+ bool encrypted:1;
LIST_FIELDS(DnsStream, streams);
};
-int dns_stream_new(Manager *m, DnsStream **s, DnsProtocol protocol, int fd);
+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);
+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);
return !!s->write_packet;
}
+
+DnsPacket *dns_stream_take_read_packet(DnsStream *s);
+
+void dns_stream_detach(DnsStream *s);