---
 src/service.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/src/service.c b/src/service.c
index 689a4e1..a8e818a 100644
--- a/src/service.c
+++ b/src/service.c
@@ -703,6 +703,29 @@ static DBusMessage *get_conversation(DBusConnection *conn,
 {
        DBusMessage *reply;
        DBusMessageIter iter, array;
+       const char *number;
+       unsigned int count;
+
+       if (dbus_message_iter_init(dbus_msg, &iter) == FALSE)
+               return __mms_error_invalid_args(dbus_msg);
+
+       if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+               return __mms_error_invalid_args(dbus_msg);
+
+       dbus_message_iter_get_basic(&iter, &number);
+       if (number[0] == '\0')
+               return __mms_error_invalid_args(dbus_msg);
+
+       if (valid_number_format(number) == FALSE)
+               return __mms_error_invalid_args(dbus_msg);
+
+       if (!dbus_message_iter_next(&iter))
+               return __mms_error_invalid_args(dbus_msg);
+
+       if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+               return __mms_error_invalid_args(dbus_msg);
+
+       dbus_message_iter_get_basic(&iter, &count);

        reply = dbus_message_new_method_return(dbus_msg);
        if (reply == NULL)
--
1.7.4.1

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