isisd: add support to import routes from other protocols

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
diff --git a/isisd/isis_redist.h b/isisd/isis_redist.h
new file mode 100644
index 0000000..2184620
--- /dev/null
+++ b/isisd/isis_redist.h
@@ -0,0 +1,58 @@
+/*
+ * IS-IS Rout(e)ing protocol - isis_redist.h
+ *
+ * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org>
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef ISIS_REDIST_H
+#define ISIS_REDIST_H
+
+#define REDIST_PROTOCOL_COUNT 2
+
+#define DEFAULT_ROUTE ZEBRA_ROUTE_MAX
+#define DEFAULT_ORIGINATE 1
+#define DEFAULT_ORIGINATE_ALWAYS 2
+
+struct isis_ext_info
+{
+  int origin;
+  uint32_t metric;
+  u_char distance;
+};
+
+struct isis_redist
+{
+  int redist;
+  uint32_t metric;
+  char *map_name;
+  struct route_map *map;
+};
+
+struct isis_area;
+struct prefix;
+
+struct route_table *get_ext_reach(struct isis_area *area,
+                                  int family, int level);
+void isis_redist_add(int type, struct prefix *p,
+                     u_char distance, uint32_t metric);
+void isis_redist_delete(int type, struct prefix *p);
+int isis_redist_config_write(struct vty *vty, struct isis_area *area,
+                             int family);
+void isis_redist_init(void);
+void isis_redist_area_finish(struct isis_area *area);
+
+#endif