--- /dev/null
+/* $Id$ */
+
+/* gras_addons - several addons to do specific stuff not in GRAS itself */
+
+/* Authors: Martin Quinson */
+/* Copyright (C) 2003 the OURAGAN project. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ under the terms of the license (GNU LGPL) which comes with this package. */
+
+#ifndef GRAS_ADDONS_H
+#define GRAS_ADDONS_H
+
+#include <gras.h>
+
+#define HOSTNAME_LEN 256
+#define ERRMSG_LEN 50
+
+/* ****************************************************************************
+ * The common types used as payload in the messages and their definitions
+ * ****************************************************************************/
+
+/**
+ * msgHost_t:
+ *
+ * Description of an host
+ */
+
+typedef struct {
+ char host[HOSTNAME_LEN];
+ unsigned int port;
+} msgHost_t;
+
+static const DataDescriptor msgHostDesc[] =
+ { SIMPLE_MEMBER(CHAR_TYPE,HOSTNAME_LEN,offsetof(msgHost_t,host)),
+ SIMPLE_MEMBER(UNSIGNED_INT_TYPE,1, offsetof(msgHost_t,port))};
+#define msgHostLen 2
+
+/**
+ * msgError_t:
+ *
+ * how to indicate an eventual error
+ */
+
+typedef struct {
+ char errmsg[ERRMSG_LEN];
+ unsigned int errcode;
+} msgError_t;
+
+static const DataDescriptor msgErrorDesc[] =
+ { SIMPLE_MEMBER(CHAR_TYPE, ERRMSG_LEN,offsetof(msgError_t,errmsg)),
+ SIMPLE_MEMBER(UNSIGNED_INT_TYPE, 1, offsetof(msgError_t,errcode))};
+#define msgErrorLen 2
+
+/**
+ * msgResult_t:
+ *
+ * how to report the result of an experiment
+ */
+
+typedef struct {
+ unsigned int timestamp;
+ double value;
+} msgResult_t;
+
+static const DataDescriptor msgResultDesc[] =
+ { SIMPLE_MEMBER(UNSIGNED_INT_TYPE, 1, offsetof(msgResult_t,timestamp)),
+ SIMPLE_MEMBER(DOUBLE_TYPE, 1, offsetof(msgResult_t,value))};
+#define msgResultLen 2
+
+/**
+ * grasRepportError:
+ *
+ * Repports an error to the process listening on socket sock.
+ *
+ * The information will be embeeded in a message of type id, which must take a msgError_t as first
+ * sequence (and SeqCount sequences in total). Other sequences beside the error one will be of
+ * length 0.
+ *
+ * The message will be builded as sprintf would, using the given format and extra args.
+ *
+ * If the message cannot be builded and sent to recipient, the string severeError will be printed
+ * on localhost's stderr.
+ */
+void
+grasRepportError (gras_socket_t *sock, int id, int SeqCount,
+ const char *severeError,
+ gras_error_t errcode, const char* format,...);
+
+#endif /* GRAS_ADDONS_H */
