IFP: Add utility functions

Adds a number of utility functions, most importanly ifp_req_create().
The ifp_req is a structure that will be passed along with the ifp
request and would provide easy access to both the sbus_request data and
per-responder data, like the ifp_ctx.

Also includes a utility function to split a path prefix from a full path
and add a ldb_element into a dictionary. These will be reused later.

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

2 files changed, 149 insertions, 0 deletions

diff --git a/src/responder/ifp/ifp_private.h b/src/responder/ifp/ifp_private.h
index b97cb8a7d..472d10441 100644
--- a/src/responder/ifp/ifp_private.h
+++ b/src/responder/ifp/ifp_private.h
@@ -46,4 +46,18 @@ struct ifp_ctx {
  * It will be removed later */
 int ifp_ping(struct sbus_request *dbus_req, void *data);
 
+/* == Utility functions == */
+struct ifp_req {
+    struct sbus_request *dbus_req;
+    struct ifp_ctx *ifp_ctx;
+};
+
+errno_t ifp_req_create(struct sbus_request *dbus_req,
+                       struct ifp_ctx *ifp_ctx,
+                       struct ifp_req **_ifp_req);
+
+const char *ifp_path_strip_prefix(const char *path, const char *prefix);
+errno_t ifp_add_ldb_el_to_dict(DBusMessageIter *iter_dict,
+                               struct ldb_message_element *el);
+
 #endif /* _IFPSRV_PRIVATE_H_ */
diff --git a/src/responder/ifp/ifpsrv_util.c b/src/responder/ifp/ifpsrv_util.c
new file mode 100644
index 000000000..e16d36279
--- /dev/null
+++ b/src/responder/ifp/ifpsrv_util.c
@@ -0,0 +1,135 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+        Stephen Gallagher <sgallagh@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: Utility functions
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "db/sysdb.h"
+#include "responder/ifp/ifp_private.h"
+
+errno_t ifp_req_create(struct sbus_request *dbus_req,
+                       struct ifp_ctx *ifp_ctx,
+                       struct ifp_req **_ifp_req)
+{
+    struct ifp_req *ireq = NULL;
+
+    if (ifp_ctx->sysbus == NULL) {
+        DEBUG(SSSDBG_CRIT_FAILURE, "Responder not connected to sysbus!\n");
+        return EINVAL;
+    }
+
+    ireq = talloc_zero(dbus_req, struct ifp_req);
+    if (ireq == NULL) {
+        return ENOMEM;
+    }
+
+    ireq->ifp_ctx = ifp_ctx;
+    ireq->dbus_req = dbus_req;
+
+    *_ifp_req = ireq;
+    return EOK;
+}
+
+const char *ifp_path_strip_prefix(const char *path, const char *prefix)
+{
+    if (strncmp(path, prefix, strlen(prefix)) == 0) {
+        return path + strlen(prefix);
+    }
+
+    return NULL;
+}
+
+errno_t ifp_add_ldb_el_to_dict(DBusMessageIter *iter_dict,
+                               struct ldb_message_element *el)
+{
+    DBusMessageIter iter_dict_entry;
+    DBusMessageIter iter_dict_val;
+    DBusMessageIter iter_array;
+    dbus_bool_t dbret;
+    unsigned int i;
+
+    if (el == NULL) {
+        return EINVAL;
+    }
+
+    dbret = dbus_message_iter_open_container(iter_dict,
+                                             DBUS_TYPE_DICT_ENTRY, NULL,
+                                             &iter_dict_entry);
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    /* Start by appending the key */
+    dbret = dbus_message_iter_append_basic(&iter_dict_entry,
+                                           DBUS_TYPE_STRING, &(el->name));
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    dbret = dbus_message_iter_open_container(&iter_dict_entry,
+                                             DBUS_TYPE_VARIANT,
+                                             DBUS_TYPE_ARRAY_AS_STRING
+                                             DBUS_TYPE_STRING_AS_STRING,
+                                             &iter_dict_val);
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    /* Open container for values */
+    dbret = dbus_message_iter_open_container(&iter_dict_val,
+                                 DBUS_TYPE_ARRAY, DBUS_TYPE_STRING_AS_STRING,
+                                 &iter_array);
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    /* Now add all the values */
+    for (i = 0; i < el->num_values; i++) {
+        DEBUG(SSSDBG_TRACE_FUNC, "element [%s] has value [%s]\n",
+              el->name, (const char *) el->values[i].data);
+
+        dbret = dbus_message_iter_append_basic(&iter_array,
+                                               DBUS_TYPE_STRING,
+                                               &(el->values[i].data));
+        if (!dbret) {
+            return ENOMEM;
+        }
+    }
+
+    dbret = dbus_message_iter_close_container(&iter_dict_val,
+                                              &iter_array);
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    dbret = dbus_message_iter_close_container(&iter_dict_entry,
+                                              &iter_dict_val);
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    dbret = dbus_message_iter_close_container(iter_dict,
+                                              &iter_dict_entry);
+    if (!dbret) {
+        return ENOMEM;
+    }
+
+    return EOK;
+}