SBUS: Add an async request to retrieve the caller ID

Adds an async request sbus_get_sender_id_{send,recv} that allows
retrieval of UID based on "sender" as returned by
dbus_message_get_sender().

The UID is an int64_t to be able to use "-1" to as a fallback value for
uknown or error cases.

The unit test is added as a standalone one, not part of the sbus_tests
because the request, and by extension the unit test relies on being
connected to the system bus, which is very unlikely to work in a build
system.

Reviewed-by: Pavel Březina <pbrezina@redhat.com>
Reviewed-by: Stef Walter <stefw@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/sbus/sssd_dbus_private.h b/src/sbus/sssd_dbus_private.h
index 58b385b71..65189b5ff 100644
--- a/src/sbus/sssd_dbus_private.h
+++ b/src/sbus/sssd_dbus_private.h
@@ -22,6 +22,8 @@
 #ifndef _SSSD_DBUS_PRIVATE_H_
 #define _SSSD_DBUS_PRIVATE_H_
 
+#include <dhash.h>
+
 #include "sssd_dbus_meta.h"
 
 union dbus_conn_pointer {
@@ -60,6 +62,7 @@ struct sbus_connection {
     char *symlink;
     sbus_server_conn_init_fn srv_init_fn;
     void *srv_init_data;
+    hash_table_t *clients;
 
     /* watches list */
     struct sbus_watch_ctx *watch_list;
@@ -126,4 +129,12 @@ int sss_dbus_conn_send(DBusConnection *dbus_conn,
                        void *pvt,
                        DBusPendingCall **pending);
 
+
+/* =Retrieve-conn-credentials=============================================== */
+struct tevent_req *sbus_get_sender_id_send(TALLOC_CTX *mem_ctx,
+                                           struct tevent_context *ev,
+                                           struct sbus_connection *conn,
+                                           const char *sender);
+int sbus_get_sender_id_recv(struct tevent_req *req, int64_t *_uid);
+
 #endif /* _SSSD_DBUS_PRIVATE_H_ */