1 files changed, 81 insertions, 0 deletions
diff --git a/src/grp-resolve/systemd-resolved/resolved-dns-stream.h b/src/grp-resolve/systemd-resolved/resolved-dns-stream.h
new file mode 100644
index 0000000000..3d5a3c22d1
--- /dev/null
+++ b/src/grp-resolve/systemd-resolved/resolved-dns-stream.h
@@ -0,0 +1,81 @@
+#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 "basic-dns/resolved-dns-packet.h"
+#include "systemd-basic/socket-util.h"
+
+typedef struct DnsStream DnsStream;
+
+#include "resolved-dns-transaction.h"
+#include "resolved-manager.h"
+
+/* Streams are used by three subsystems:
+ *
+ *   1. The normal transaction logic when doing a DNS or LLMNR lookup via TCP
+ *   2. The LLMNR logic when accepting a TCP-based lookup
+ *   3. The DNS stub logic when accepting a TCP-based lookup
+ */
+
+struct DnsStream {
+        Manager *manager;
+        int n_ref;
+
+        DnsProtocol protocol;
+
+        int fd;
+        union sockaddr_union peer;
+        socklen_t peer_salen;
+        union sockaddr_union local;
+        socklen_t local_salen;
+        int ifindex;
+        uint32_t ttl;
+        bool identified;
+
+        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;
+
+        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_FIELDS(DnsStream, streams);
+};
+
+int dns_stream_new(Manager *m, DnsStream **s, DnsProtocol protocol, int fd);
+DnsStream *dns_stream_unref(DnsStream *s);
+DnsStream *dns_stream_ref(DnsStream *s);
+
+int dns_stream_write_packet(DnsStream *s, DnsPacket *p);
+
+static inline bool DNS_STREAM_QUEUED(DnsStream *s) {
+        assert(s);
+
+        if (s->fd < 0) /* already stopped? */
+                return false;
+
+        return !!s->write_packet;
+}