1 files changed, 135 insertions, 0 deletions
diff --git a/src/libcore/bus-endpoint.c b/src/libcore/bus-endpoint.c
new file mode 100644
index 0000000000..d22a80c91f
--- /dev/null
+++ b/src/libcore/bus-endpoint.c
@@ -0,0 +1,135 @@
+/***
+  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 "alloc-util.h"
+#include "bus-endpoint.h"
+#include "bus-kernel.h"
+#include "bus-policy.h"
+#include "kdbus.h"
+
+int bus_kernel_set_endpoint_policy(int fd, uid_t uid, BusEndpoint *ep) {
+
+        struct kdbus_cmd *update;
+        struct kdbus_item *n;
+        BusEndpointPolicy *po;
+        Iterator i;
+        size_t size;
+        int r;
+
+        size = ALIGN8(offsetof(struct kdbus_cmd, items));
+
+        HASHMAP_FOREACH(po, ep->policy_hash, i) {
+                size += ALIGN8(offsetof(struct kdbus_item, str) + strlen(po->name) + 1);
+                size += ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access));
+        }
+
+        update = alloca0_align(size, 8);
+        update->size = size;
+
+        n = update->items;
+
+        HASHMAP_FOREACH(po, ep->policy_hash, i) {
+                n->type = KDBUS_ITEM_NAME;
+                n->size = offsetof(struct kdbus_item, str) + strlen(po->name) + 1;
+                strcpy(n->str, po->name);
+                n = KDBUS_ITEM_NEXT(n);
+
+                n->type = KDBUS_ITEM_POLICY_ACCESS;
+                n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access);
+
+                n->policy_access.type = KDBUS_POLICY_ACCESS_USER;
+                n->policy_access.access = bus_kernel_translate_access(po->access);
+                n->policy_access.id = uid;
+
+                n = KDBUS_ITEM_NEXT(n);
+        }
+
+        r = ioctl(fd, KDBUS_CMD_ENDPOINT_UPDATE, update);
+        if (r < 0)
+                return -errno;
+
+        return 0;
+}
+
+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 = NULL;
+        _cleanup_free_ char *key = NULL;
+        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_ops);
+                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);
+}