ipcpd: normal: Add graph structure

This adds a graph structure which will be updated by routing when it
is notified about a new RIB event. The routing can then use this graph
as input for calculating the shortest path to a destination.

1 files changed, 67 insertions, 0 deletions

diff --git a/src/ipcpd/normal/graph.h b/src/ipcpd/normal/graph.h
new file mode 100644
index 00000000..9653efd7
--- /dev/null
+++ b/src/ipcpd/normal/graph.h
@@ -0,0 +1,67 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Graph structure
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_GRAPH_H
+#define OUROBOROS_IPCPD_NORMAL_GRAPH_H
+
+#include <ouroboros/list.h>
+#include <ouroboros/qos.h>
+
+#include <inttypes.h>
+
+struct edge {
+        struct list_head next;
+        uint64_t         dst_addr;
+        qosspec_t        qs;
+};
+
+struct vertex {
+        struct list_head next;
+        uint64_t         addr;
+        struct list_head edges;
+};
+
+struct graph {
+        size_t           nr_vertices;
+        struct list_head vertices;
+        pthread_mutex_t  lock;
+};
+
+struct graph * graph_create(void);
+
+void           graph_destroy(struct graph * graph);
+
+int            graph_add_edge(struct graph * graph,
+                              uint64_t       s_addr,
+                              uint64_t       d_addr,
+                              qosspec_t      qs);
+
+int            graph_update_edge(struct graph * graph,
+                                 uint64_t       s_addr,
+                                 uint64_t       d_addr,
+                                 qosspec_t      qs);
+
+int            graph_del_edge(struct graph * graph,
+                              uint64_t       s_addr,
+                              uint64_t       d_addr);
+
+#endif /* OUROBOROS_IPCPD_NORMAL_GRAPH_H */