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-rw-r--r--src/grp-resolve/systemd-resolved/resolved-dns-stream.h80
1 files changed, 80 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..bea93487de
--- /dev/null
+++ b/src/grp-resolve/systemd-resolved/resolved-dns-stream.h
@@ -0,0 +1,80 @@
+#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"
+
+/* 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;
+}