bgpd: Remove AS Path limit/TTL functionality

* draft-ietf-idr-as-pathlimit doesn't seem to have gone anywhere, and its
  author does not think it will make progress in IDR. Remove all support
  introduced for it, but leave stubs for the commands to avoid breaking
  any configurations.

  Basically reverts cecab5e9725792e60a5e4b473e238a14cd85815d.

1 files changed, 11 insertions, 110 deletions

diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c
index aa7dbce1..81ff48db 100644
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -92,107 +92,15 @@ o Cisco route-map
       origin            :  Done
       tag               :  (This will not be implemented by bgpd)
       weight            :  Done
-      pathlimit		:  Done
 
 o Local extention
 
   set ipv6 next-hop global: Done
   set ipv6 next-hop local : Done
-  set pathlimit ttl       : Done
   set as-path exclude     : Done
-  match pathlimit as     : Done
 
 */ 
 
-/* Compiles either AS or TTL argument. It is amused the VTY code
- * has already range-checked the values to be suitable as TTL or ASN
- */
-static void *
-route_pathlimit_compile (const char *arg)
-{
-  unsigned long tmp;
-  u_int32_t *val;
-  char *endptr = NULL;
-
-  /* TTL or AS value shoud be integer. */
-  if (! all_digit (arg))
-    return NULL;
-  
-  tmp = strtoul (arg, &endptr, 10);
-  if (*endptr != '\0' || tmp == ULONG_MAX || tmp > UINT32_MAX)
-    return NULL;
-   
-  if (!(val = XMALLOC (MTYPE_ROUTE_MAP_COMPILED, sizeof (u_int32_t))))
-    return NULL;
-  
-  *val = tmp;
-  
-  return val;
-}
-
-static void
-route_pathlimit_free (void *rule)
-{
-  XFREE (MTYPE_ROUTE_MAP_COMPILED, rule);
-}
-
-static route_map_result_t
-route_match_pathlimit_as (void *rule, struct prefix *prefix, route_map_object_t type,
-      void *object)
-{
-  struct bgp_info *info = object;
-  struct attr *attr = info->attr;
-  uint32_t as = *(uint32_t *)rule;
-  
-  if (type != RMAP_BGP)
-    return RMAP_NOMATCH;
-  
-  if (!attr->pathlimit.as)
-    return RMAP_NOMATCH;
-  
-  if (as == attr->pathlimit.as)
-    return RMAP_MATCH;
-  
-  return RMAP_NOMATCH;
-}
-
-/* 'match pathlimit as' */
-struct route_map_rule_cmd route_match_pathlimit_as_cmd =
-{
-  "pathlimit as",
-  route_match_pathlimit_as,
-  route_pathlimit_compile,
-  route_pathlimit_free
-};
-
-/* Set pathlimit TTL. */
-static route_map_result_t
-route_set_pathlimit_ttl (void *rule, struct prefix *prefix,
-		         route_map_object_t type, void *object)
-{
-  struct bgp_info *info = object;
-  struct attr *attr = info->attr;
-  u_char ttl = *(uint32_t *)rule;
-  
-  if (type == RMAP_BGP)
-    {
-      attr->flag |= ATTR_FLAG_BIT (BGP_ATTR_AS_PATHLIMIT);
-      attr->pathlimit.ttl = ttl;
-      attr->pathlimit.as = 0;
-    }
-
-  return RMAP_OKAY;
-}
-
-/* Set local preference rule structure. */
-struct route_map_rule_cmd route_set_pathlimit_ttl_cmd = 
-{
-  "pathlimit ttl",
-  route_set_pathlimit_ttl,
-  route_pathlimit_compile,
-  route_pathlimit_free,
-};
-
  /* 'match peer (A.B.C.D|X:X::X:X)' */
 
 /* Compares the peer specified in the 'match peer' clause with the peer
@@ -3743,17 +3651,17 @@ ALIAS (no_set_originator_id,
        "BGP originator ID attribute\n"
        "IP address of originator\n")
 
-DEFUN (set_pathlimit_ttl,
+DEFUN_DEPRECATED (set_pathlimit_ttl,
        set_pathlimit_ttl_cmd,
        "set pathlimit ttl <1-255>",
        SET_STR
        "BGP AS-Pathlimit attribute\n"
        "Set AS-Path Hop-count TTL\n")
 {
-  return bgp_route_set_add (vty, vty->index, "pathlimit ttl", argv[0]);
+  return CMD_SUCCESS;
 }
 
-DEFUN (no_set_pathlimit_ttl,
+DEFUN_DEPRECATED (no_set_pathlimit_ttl,
        no_set_pathlimit_ttl_cmd,
        "no set pathlimit ttl",
        NO_STR
@@ -3761,10 +3669,7 @@ DEFUN (no_set_pathlimit_ttl,
        "BGP AS-Pathlimit attribute\n"
        "Set AS-Path Hop-count TTL\n")
 {
-  if (argc == 0)
-    return bgp_route_set_delete (vty, vty->index, "pathlimit ttl", NULL);
-  
-  return bgp_route_set_delete (vty, vty->index, "pathlimit ttl", argv[0]);
+  return CMD_SUCCESS;
 }
 
 ALIAS (no_set_pathlimit_ttl,
@@ -3775,17 +3680,17 @@ ALIAS (no_set_pathlimit_ttl,
        "BGP AS-Pathlimit attribute\n"
        "Set AS-Path Hop-count TTL\n")
 
-DEFUN (match_pathlimit_as,
+DEFUN_DEPRECATED (match_pathlimit_as,
        match_pathlimit_as_cmd,
        "match pathlimit as <1-65535>",
        MATCH_STR
        "BGP AS-Pathlimit attribute\n"
        "Match Pathlimit AS number\n")
 {
-  return bgp_route_match_add (vty, vty->index, "pathlimit as", argv[0]);
+  return CMD_SUCCESS;
 }
 
-DEFUN (no_match_pathlimit_as,
+DEFUN_DEPRECATED (no_match_pathlimit_as,
        no_match_pathlimit_as_cmd,
        "no match pathlimit as",
        NO_STR
@@ -3793,10 +3698,7 @@ DEFUN (no_match_pathlimit_as,
        "BGP AS-Pathlimit attribute\n"
        "Match Pathlimit AS number\n")
 {
-  if (argc == 0)
-    return bgp_route_match_delete (vty, vty->index, "pathlimit as", NULL);
-  
-  return bgp_route_match_delete (vty, vty->index, "pathlimit as", argv[0]);
+  return CMD_SUCCESS;
 }
 
 ALIAS (no_match_pathlimit_as,
@@ -3959,10 +3861,9 @@ bgp_route_map_init (void)
   install_element (RMAP_NODE, &no_set_ipv6_nexthop_local_val_cmd);
 #endif /* HAVE_IPV6 */
 
-  /* AS-Pathlimit */
-  route_map_install_match (&route_match_pathlimit_as_cmd);
-  route_map_install_set (&route_set_pathlimit_ttl_cmd);
-
+  /* AS-Pathlimit: functionality removed, commands kept for
+   * compatibility.
+   */
   install_element (RMAP_NODE, &set_pathlimit_ttl_cmd);
   install_element (RMAP_NODE, &no_set_pathlimit_ttl_cmd);
   install_element (RMAP_NODE, &no_set_pathlimit_ttl_val_cmd);