isisd: add support to import routes from other protocols

Signed-off-by: Christian Franke <chris@opensourcerouting.org>

1 files changed, 505 insertions, 46 deletions

diff --git a/isisd/isis_routemap.c b/isisd/isis_routemap.c
index 84a14ac57..3e0ab047e 100644
--- a/isisd/isis_routemap.c
+++ b/isisd/isis_routemap.c
@@ -1,13 +1,10 @@
 /*
- * IS-IS Rout(e)ing protocol               - isis_routemap.c
- *
- * Copyright (C) 2001,2002   Sampo Saaristo
- *                           Tampere University of Technology      
- *                           Institute of Communications Engineering
+ * IS-IS Rout(e)ing protocol - isis_routemap.c
  *
+ * 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 Licenseas published by the Free 
+ * 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.
  *
@@ -20,18 +17,22 @@
  * with this program; if not, write to the Free Software Foundation, Inc., 
  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+
 #include <zebra.h>
 
-#include "thread.h"
+#include "command.h"
+#include "filter.h"
+#include "hash.h"
+#include "if.h"
 #include "linklist.h"
-#include "vty.h"
 #include "log.h"
 #include "memory.h"
 #include "prefix.h"
-#include "hash.h"
-#include "if.h"
-#include "table.h"
+#include "plist.h"
 #include "routemap.h"
+#include "table.h"
+#include "thread.h"
+#include "vty.h"
 
 #include "isis_constants.h"
 #include "isis_common.h"
@@ -47,60 +48,518 @@
 #include "isis_spf.h"
 #include "isis_route.h"
 #include "isis_zebra.h"
+#include "isis_routemap.h"
 
-extern struct isis *isis;
+static route_map_result_t
+route_match_ip_address(void *rule, struct prefix *prefix,
+                       route_map_object_t type, void *object)
+{
+  struct access_list *alist;
 
-/*
- * Prototypes.
- */
-void isis_route_map_upd(const char *);
-void isis_route_map_event(route_map_event_t, const char *);
-void isis_route_map_init(void);
+  if (type != RMAP_ISIS)
+    return RMAP_NOMATCH;
 
+  alist = access_list_lookup(AFI_IP, (char*)rule);
+  if (access_list_apply(alist, prefix) != FILTER_DENY)
+    return RMAP_MATCH;
 
-void
-isis_route_map_upd (const char *name)
+  return RMAP_NOMATCH;
+}
+
+static void *
+route_match_ip_address_compile(const char *arg)
+{
+  return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
+}
+
+static void
+route_match_ip_address_free(void *rule)
+{
+  XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+static struct route_map_rule_cmd route_match_ip_address_cmd =
+{
+  "ip address",
+  route_match_ip_address,
+  route_match_ip_address_compile,
+  route_match_ip_address_free
+};
+
+/* ------------------------------------------------------------*/
+
+static route_map_result_t
+route_match_ip_address_prefix_list(void *rule, struct prefix *prefix,
+                                   route_map_object_t type, void *object)
+{
+  struct prefix_list *plist;
+
+  if (type != RMAP_ISIS)
+    return RMAP_NOMATCH;
+
+  plist = prefix_list_lookup(AFI_IP, (char*)rule);
+  if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
+    return RMAP_MATCH;
+
+  return RMAP_NOMATCH;
+}
+
+static void *
+route_match_ip_address_prefix_list_compile(const char *arg)
+{
+  return XSTRDUP (MTYPE_ROUTE_MAP_COMPILED, arg);
+}
+
+static void
+route_match_ip_address_prefix_list_free (void *rule)
+{
+  XFREE (MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+struct route_map_rule_cmd route_match_ip_address_prefix_list_cmd =
+{
+  "ip address prefix-list",
+  route_match_ip_address_prefix_list,
+  route_match_ip_address_prefix_list_compile,
+  route_match_ip_address_prefix_list_free
+};
+
+/* ------------------------------------------------------------*/
+
+static route_map_result_t
+route_match_ipv6_address(void *rule, struct prefix *prefix,
+                         route_map_object_t type, void *object)
 {
-  int i = 0;
+  struct access_list *alist;
 
-  if (!isis)
-    return;
+  if (type != RMAP_ISIS)
+    return RMAP_NOMATCH;
+
+  alist = access_list_lookup(AFI_IP6, (char*)rule);
+  if (access_list_apply(alist, prefix) != FILTER_DENY)
+    return RMAP_MATCH;
+
+  return RMAP_NOMATCH;
+}
+
+static void *
+route_match_ipv6_address_compile(const char *arg)
+{
+  return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
+}
+
+static void
+route_match_ipv6_address_free(void *rule)
+{
+  XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+static struct route_map_rule_cmd route_match_ipv6_address_cmd =
+{
+  "ipv6 address",
+  route_match_ipv6_address,
+  route_match_ipv6_address_compile,
+  route_match_ipv6_address_free
+};
+
+/* ------------------------------------------------------------*/
+
+static route_map_result_t
+route_match_ipv6_address_prefix_list(void *rule, struct prefix *prefix,
+                                     route_map_object_t type, void *object)
+{
+  struct prefix_list *plist;
 
-  for (i = 0; i <= ZEBRA_ROUTE_MAX; i++)
+  if (type != RMAP_ISIS)
+    return RMAP_NOMATCH;
+
+  plist = prefix_list_lookup(AFI_IP6, (char*)rule);
+  if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
+    return RMAP_MATCH;
+
+  return RMAP_NOMATCH;
+}
+
+static void *
+route_match_ipv6_address_prefix_list_compile(const char *arg)
+{
+  return XSTRDUP (MTYPE_ROUTE_MAP_COMPILED, arg);
+}
+
+static void
+route_match_ipv6_address_prefix_list_free (void *rule)
+{
+  XFREE (MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+struct route_map_rule_cmd route_match_ipv6_address_prefix_list_cmd =
+{
+  "ipv6 address prefix-list",
+  route_match_ipv6_address_prefix_list,
+  route_match_ipv6_address_prefix_list_compile,
+  route_match_ipv6_address_prefix_list_free
+};
+
+/* ------------------------------------------------------------*/
+
+static route_map_result_t
+route_set_metric(void *rule, struct prefix *prefix,
+                 route_map_object_t type, void *object)
+{
+  uint32_t *metric;
+  struct isis_ext_info *info;
+
+  if (type == RMAP_ISIS)
     {
-      if (isis->rmap[i].name)
-	isis->rmap[i].map = route_map_lookup_by_name (isis->rmap[i].name);
-      else
-	isis->rmap[i].map = NULL;
+      metric = rule;
+      info = object;
+
+      info->metric = *metric;
     }
-  /* FIXME: do the address family sub-mode AF_INET6 here ? */
+  return RMAP_OKAY;
 }
 
-void
-isis_route_map_event (route_map_event_t event, const char *name)
+static void *
+route_set_metric_compile(const char *arg)
+{
+  unsigned long metric;
+  char *endp;
+  uint32_t *ret;
+
+  metric = strtoul(arg, &endp, 10);
+  if (arg[0] == '\0' || *endp != '\0' || metric > MAX_WIDE_PATH_METRIC)
+    return NULL;
+
+  ret = XCALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(ret));
+  *ret = metric;
+
+  return ret;
+}
+
+static void
+route_set_metric_free(void *rule)
 {
-  int type;
+  XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
+}
+
+static struct route_map_rule_cmd route_set_metric_cmd =
+{
+  "metric",
+  route_set_metric,
+  route_set_metric_compile,
+  route_set_metric_free
+};
 
-  if (!isis)
-    return;
+/* ------------------------------------------------------------*/
+
+static int
+isis_route_match_add(struct vty *vty, struct route_map_index *index,
+                      const char *command, const char *arg)
+{
+  int ret;
 
-  for (type = 0; type <= ZEBRA_ROUTE_MAX; type++)
+  ret = route_map_add_match (index, command, arg);
+  if (ret)
     {
-      if (isis->rmap[type].name && isis->rmap[type].map &&
-	  !strcmp (isis->rmap[type].name, name))
-	{
-	  isis_distribute_list_update (type);
-	}
+      switch (ret)
+        {
+        case RMAP_RULE_MISSING:
+          vty_out (vty, "%% Can't find rule.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        case RMAP_COMPILE_ERROR:
+          vty_out (vty, "%% Argument is malformed.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        }
     }
+  return CMD_SUCCESS;
+}
+
+static int
+isis_route_match_delete(struct vty *vty, struct route_map_index *index,
+                        const char *command, const char *arg)
+{
+  int ret;
+
+  ret = route_map_delete_match (index, command, arg);
+  if (ret)
+    {
+      switch (ret)
+        {
+        case RMAP_RULE_MISSING:
+          vty_out (vty, "%% Can't find rule.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        case RMAP_COMPILE_ERROR:
+          vty_out (vty, "%% Argument is malformed.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        }
+    }
+  return CMD_SUCCESS;
+}
+
+static int
+isis_route_set_add(struct vty *vty, struct route_map_index *index,
+                   const char *command, const char *arg)
+{
+  int ret;
+
+  ret = route_map_add_set(index, command, arg);
+  if (ret)
+    {
+      switch (ret)
+        {
+        case RMAP_RULE_MISSING:
+          vty_out (vty, "%% Can't find rule.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        case RMAP_COMPILE_ERROR:
+          vty_out (vty, "%% Argument is malformed.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        }
+    }
+
+  return CMD_SUCCESS;
+}
+
+static int
+isis_route_set_delete (struct vty *vty, struct route_map_index *index,
+		       const char *command, const char *arg)
+{
+  int ret;
+
+  ret = route_map_delete_set (index, command, arg);
+  if (ret)
+    {
+      switch (ret)
+        {
+        case RMAP_RULE_MISSING:
+          vty_out (vty, "%% Can't find rule.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        case RMAP_COMPILE_ERROR:
+          vty_out (vty, "%% Argument is malformed.%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        }
+    }
+
+  return CMD_SUCCESS;
+}
+
+/* ------------------------------------------------------------*/
+
+DEFUN(match_ip_address,
+      match_ip_address_cmd,
+      "match ip address (<1-199>|<1300-2699>|WORD)",
+      MATCH_STR
+      IP_STR
+      "Match address of route\n"
+      "IP access-list number\n"
+      "IP access-list number (expanded range)\n"
+      "IP Access-list name\n")
+{
+  return isis_route_match_add(vty, vty->index, "ip address", argv[0]);
+}
+
+DEFUN(no_match_ip_address,
+      no_match_ip_address_val_cmd,
+      "no match ip address (<1-199>|<1300-2699>|WORD)",
+      NO_STR
+      MATCH_STR
+      IP_STR
+      "Match address of route\n"
+      "IP access-list number\n"
+      "IP access-list number (expanded range)\n"
+      "IP Access-list name\n")
+{
+  if (argc == 0)
+    return isis_route_match_delete(vty, vty->index, "ip address", NULL);
+  return isis_route_match_delete(vty, vty->index, "ip address", argv[0]);
 }
 
+ALIAS(no_match_ip_address,
+      no_match_ip_address_cmd,
+      "no match ip address",
+      NO_STR
+      MATCH_STR
+      IP_STR
+      "Match address of route\n"
+);
+
+/* ------------------------------------------------------------*/
+
+DEFUN(match_ip_address_prefix_list,
+      match_ip_address_prefix_list_cmd,
+      "match ip address prefix-list WORD",
+      MATCH_STR
+      IP_STR
+      "Match address of route\n"
+      "Match entries of prefix-lists\n"
+      "IP prefix-list name\n")
+{
+  return isis_route_match_add(vty, vty->index, "ip address prefix-list", argv[0]);
+}
+
+DEFUN(no_match_ip_address_prefix_list,
+      no_match_ip_address_prefix_list_cmd,
+      "no match ip address prefix-list",
+      NO_STR
+      MATCH_STR
+      IP_STR
+      "Match address of route\n"
+      "Match entries of prefix-lists\n")
+{
+  if (argc == 0)
+    return isis_route_match_delete (vty, vty->index, "ip address prefix-list", NULL);
+  return isis_route_match_delete (vty, vty->index, "ip address prefix-list", argv[0]);
+}
+
+ALIAS(no_match_ip_address_prefix_list,
+      no_match_ip_address_prefix_list_val_cmd,
+      "no match ip address prefix-list WORD",
+      NO_STR
+      MATCH_STR
+      IP_STR
+      "Match address of route\n"
+      "Match entries of prefix-lists\n"
+      "IP prefix-list name\n"
+);
+
+/* ------------------------------------------------------------*/
+
+DEFUN(match_ipv6_address,
+      match_ipv6_address_cmd,
+      "match ipv6 address WORD",
+      MATCH_STR
+      IPV6_STR
+      "Match IPv6 address of route\n"
+      "IPv6 access-list name\n")
+{
+  return isis_route_match_add(vty, vty->index, "ipv6 address", argv[0]);
+}
+
+DEFUN(no_match_ipv6_address,
+      no_match_ipv6_address_val_cmd,
+      "no match ipv6 address WORD",
+      NO_STR
+      MATCH_STR
+      IPV6_STR
+      "Match IPv6 address of route\n"
+      "IPv6 access-list name\n")
+{
+  if (argc == 0)
+    return isis_route_match_delete(vty, vty->index, "ipv6 address", NULL);
+  return isis_route_match_delete(vty, vty->index, "ipv6 address", argv[0]);
+}
+
+ALIAS(no_match_ipv6_address,
+      no_match_ipv6_address_cmd,
+      "no match ipv6 address",
+      NO_STR
+      MATCH_STR
+      IPV6_STR
+      "Match IPv6 address of route\n"
+);
+
+/* ------------------------------------------------------------*/
+
+DEFUN(match_ipv6_address_prefix_list,
+      match_ipv6_address_prefix_list_cmd,
+      "match ipv6 address prefix-list WORD",
+      MATCH_STR
+      IPV6_STR
+      "Match address of route\n"
+      "Match entries of prefix-lists\n"
+      "IP prefix-list name\n")
+{
+  return isis_route_match_add(vty, vty->index, "ipv6 address prefix-list", argv[0]);
+}
+
+DEFUN(no_match_ipv6_address_prefix_list,
+      no_match_ipv6_address_prefix_list_cmd,
+      "no match ipv6 address prefix-list",
+      NO_STR
+      MATCH_STR
+      IPV6_STR
+      "Match address of route\n"
+      "Match entries of prefix-lists\n")
+{
+  if (argc == 0)
+    return isis_route_match_delete (vty, vty->index, "ipv6 address prefix-list", NULL);
+  return isis_route_match_delete (vty, vty->index, "ipv6 address prefix-list", argv[0]);
+}
+
+ALIAS(no_match_ipv6_address_prefix_list,
+      no_match_ipv6_address_prefix_list_val_cmd,
+      "no match ipv6 address prefix-list WORD",
+      NO_STR
+      MATCH_STR
+      IPV6_STR
+      "Match address of route\n"
+      "Match entries of prefix-lists\n"
+      "IP prefix-list name\n"
+);
+
+/* ------------------------------------------------------------*/
+
+/* set metric already exists e.g. in the ospf routemap. vtysh doesn't cope well with different
+ * commands at the same node, therefore add set metric with the same 32-bit range as ospf and
+ * verify that the input is a valid isis metric */
+DEFUN(set_metric,
+      set_metric_cmd,
+      "set metric <0-4294967295>",
+      SET_STR
+      "Metric vale for destination routing protocol\n"
+      "Metric value\n")
+{
+  return isis_route_set_add(vty, vty->index, "metric", argv[0]);
+}
+
+DEFUN(no_set_metric,
+      no_set_metric_val_cmd,
+      "no set metric <0-4294967295>",
+      NO_STR
+      SET_STR
+      "Metric value for destination routing protocol\n"
+      "Metric value\n")
+{
+  if (argc == 0)
+    return isis_route_set_delete(vty, vty->index, "metric", NULL);
+  return isis_route_set_delete(vty, vty->index, "metric", argv[0]);
+}
+
+ALIAS(no_set_metric,
+      no_set_metric_cmd,
+      "no set metric",
+      NO_STR
+      SET_STR
+      "Metric vale for destination routing protocol\n"
+);
+
 void
-isis_route_map_init (void)
+isis_route_map_init(void)
 {
-  route_map_init ();
-  route_map_init_vty ();
+  route_map_init();
+  route_map_init_vty();
+
+  route_map_install_match(&route_match_ip_address_cmd);
+  install_element(RMAP_NODE, &match_ip_address_cmd);
+  install_element(RMAP_NODE, &no_match_ip_address_val_cmd);
+  install_element(RMAP_NODE, &no_match_ip_address_cmd);
+
+  route_map_install_match(&route_match_ip_address_prefix_list_cmd);
+  install_element(RMAP_NODE, &match_ip_address_prefix_list_cmd);
+  install_element(RMAP_NODE, &no_match_ip_address_prefix_list_val_cmd);
+  install_element(RMAP_NODE, &no_match_ip_address_prefix_list_cmd);
+
+  route_map_install_match(&route_match_ipv6_address_cmd);
+  install_element(RMAP_NODE, &match_ipv6_address_cmd);
+  install_element(RMAP_NODE, &no_match_ipv6_address_val_cmd);
+  install_element(RMAP_NODE, &no_match_ipv6_address_cmd);
+
+  route_map_install_match(&route_match_ipv6_address_prefix_list_cmd);
+  install_element(RMAP_NODE, &match_ipv6_address_prefix_list_cmd);
+  install_element(RMAP_NODE, &no_match_ipv6_address_prefix_list_val_cmd);
+  install_element(RMAP_NODE, &no_match_ipv6_address_prefix_list_cmd);
 
-  route_map_add_hook (isis_route_map_upd);
-  route_map_delete_hook (isis_route_map_upd);
-  route_map_event_hook (isis_route_map_event);
+  route_map_install_set(&route_set_metric_cmd);
+  install_element(RMAP_NODE, &set_metric_cmd);
+  install_element(RMAP_NODE, &no_set_metric_val_cmd);
+  install_element(RMAP_NODE, &no_set_metric_cmd);
 }