resolved: add a DNS client stub resolver

Let's turn resolved into a something truly useful: a fully asynchronous
DNS stub resolver that subscribes to network changes.

(More to come: caching, LLMNR, mDNS/DNS-SD, DNSSEC, IDN, NSS module)

1 files changed, 61 insertions, 0 deletions

diff --git a/src/resolve/resolved-dns-server.h b/src/resolve/resolved-dns-server.h
new file mode 100644
index 000000000..adceb868a
--- /dev/null
+++ b/src/resolve/resolved-dns-server.h
@@ -0,0 +1,61 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#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/>.
+***/
+
+typedef struct DnsServer DnsServer;
+typedef enum DnsServerSource DnsServerSource;
+
+#include "in-addr-util.h"
+#include "resolved.h"
+#include "resolved-link.h"
+#include "resolved-dns-server.h"
+
+enum DnsServerSource {
+        DNS_SERVER_SYSTEM,
+        DNS_SERVER_LINK,
+        DNS_SERVER_DHCP,
+        _DNS_SERVER_SOURCE_MAX
+};
+
+struct DnsServer {
+        Manager *manager;
+        DnsServerSource source;
+
+        unsigned char family;
+        union in_addr_union address;
+
+        bool marked;
+
+        Link *link;
+
+        LIST_FIELDS(DnsServer, servers);
+};
+
+int dns_server_new(
+                Manager *m,
+                DnsServer **s,
+                DnsServerSource source,
+                Link *l,
+                unsigned char family,
+                union in_addr_union *in_addr);
+
+DnsServer* dns_server_free(DnsServer *s);