bus: add kdbus endpoint types

Add types to describe endpoints and associated policy entries,
and add a BusEndpoint instace to ExecContext.

1 files changed, 90 insertions, 0 deletions

diff --git a/src/core/bus-endpoint.c b/src/core/bus-endpoint.c
new file mode 100644
index 0000000000..8d11974db4
--- /dev/null
+++ b/src/core/bus-endpoint.c
@@ -0,0 +1,90 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Daniel Mack
+
+  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 <stdlib.h>
+
+#include "bus-endpoint.h"
+
+int bus_endpoint_new(BusEndpoint **ep)
+{
+        assert(ep);
+
+        *ep = new0(BusEndpoint, 1);
+        if (!*ep)
+                return -ENOMEM;
+
+        return 0;
+}
+
+int bus_endpoint_add_policy(BusEndpoint *ep, const char *name, BusPolicyAccess access)
+{
+        _cleanup_free_ BusEndpointPolicy *po;
+        _cleanup_free_ char *key;
+        int r;
+
+        assert(ep);
+        assert(name);
+        assert(access > _BUS_POLICY_ACCESS_INVALID && access < _BUS_POLICY_ACCESS_MAX);
+
+        /* check if we already have this name in the policy list. If we do, see if the new access level
+         * is higher than the exising one, and upgrade the entry in that case. Otherwise, do nothing.
+         */
+
+        if (ep->policy_hash) {
+                po = hashmap_get(ep->policy_hash, name);
+                if (po) {
+                        if (po->access < access)
+                                po->access = access;
+
+                        return 0;
+                }
+        } else {
+                ep->policy_hash = hashmap_new(string_hash_func, string_compare_func);
+                if (!ep->policy_hash)
+                        return -ENOMEM;
+        }
+
+        po = new0(BusEndpointPolicy, 1);
+        if (!po)
+                return -ENOMEM;
+
+        key = strdup(name);
+        if (!key)
+                return -ENOMEM;
+
+        po->name = key;
+        po->access = access;
+
+        r = hashmap_put(ep->policy_hash, key, po);
+        if (r < 0)
+                return r;
+
+        po = NULL;
+        key = NULL;
+        return 0;
+}
+
+void bus_endpoint_free(BusEndpoint *endpoint)
+{
+        if (!endpoint)
+                return;
+
+        hashmap_free_free_free(endpoint->policy_hash);
+        free(endpoint);
+}