eigrpd: Introduce eigrp_metric.[ch] and eigrp_types.h

Add these file and introduce some new fundamental types

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Signed-off-by: Donnie Savage <diivious@hotmail.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/eigrpd/eigrp_metric.h b/eigrpd/eigrp_metric.h
new file mode 100644
index 0000000000..8e9cd66747
--- /dev/null
+++ b/eigrpd/eigrp_metric.h
@@ -0,0 +1,63 @@
+/*
+ * EIGRP Metric Math Functions.
+ * Copyright (C) 2013-2016
+ * Authors:
+ *   Donnie Savage
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _ZEBRA_EIGRP_METRIC_H_
+#define _ZEBRA_EIGRP_METRIC_H_
+
+/* Constants */
+#define EIGRP_BANDWIDTH_MIN 0x1ull		  /* 1 */
+#define EIGRP_BANDWIDTH_SCALER 10000000ull	  /* Inversion value */
+#define EIGRP_BANDWIDTH_MAX 0xffffffffffffffffull /* 1.84467441x10^19 */
+
+#define EIGRP_DELAY_MIN 0x1ull /* 1 */
+#define EIGRP_DELAY_PICO 1000000ull
+#define EIGRP_DELAY_MAX 0xffffffffffffffffull /* 1.84467441x10^19 */
+
+#define EIGRP_MAX_LOAD 256
+#define EIGRP_MAX_HOPS 100
+
+#define EIGRP_INACCESSIBLE 0xFFFFFFFFFFFFFFFFull
+
+#define EIGRP_METRIC_MAX 0xffffffffffffffffull /* 1.84467441x10^19 */
+#define EIGRP_METRIC_MAX_CLASSIC 0xffffffff
+#define EIGRP_METRIC_SCALER 65536	       /* CLASSIC to WIDE conversion */
+
+#define EIGRP_CLASSIC_MAX 0xffffffff /* 4294967295 */
+#define EIGRP_CLASSIC_SCALER 256     /* IGRP to EIGRP conversion */
+
+
+/* Prototypes */
+extern eigrp_scaled_t eigrp_bandwidth_to_scaled(eigrp_bandwidth_t bw);
+extern eigrp_bandwidth_t eigrp_scaled_to_bandwidth(eigrp_scaled_t scale);
+extern eigrp_scaled_t eigrp_delay_to_scaled(eigrp_delay_t delay);
+extern eigrp_delay_t eigrp_scaled_to_delay(eigrp_scaled_t scale);
+
+extern eigrp_metric_t eigrp_calculate_metrics(struct eigrp *eigrp,
+					      struct eigrp_metrics metric);
+extern eigrp_metric_t
+eigrp_calculate_total_metrics(struct eigrp *eigrp,
+			      struct eigrp_route_descriptor *rd);
+extern bool eigrp_metrics_is_same(struct eigrp_metrics m1,
+				  struct eigrp_metrics m2);
+
+#endif /* _ZEBRA_EIGRP_METRIC_H_ */