bird/proto/static/config.Y

/*
 *	BIRD -- Static Protocol Configuration
 *
 *	(c) 1998--1999 Martin Mares <mj@ucw.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

CF_HDR

#include "proto/static/static.h"

CF_DEFINES

#define STATIC_CFG ((struct static_config *) this_proto)
static struct static_route *this_srt, *this_srt_nh, *last_srt_nh;
static struct f_inst **this_srt_last_cmd;

static void
static_route_finish(void)
{
  struct static_route *r;

  /* Update undefined use_bfd entries in multipath nexthops */
  if (this_srt->dest == RTD_MULTIPATH)
    for (r = this_srt->mp_next; r; r = r->mp_next)
      if (r->use_bfd < 0)
        r->use_bfd = this_srt->use_bfd;
}

CF_DECLS

CF_KEYWORDS(STATIC, ROUTE, VIA, DROP, REJECT, PROHIBIT, PREFERENCE, CHECK, LINK)
CF_KEYWORDS(MULTIPATH, WEIGHT, RECURSIVE, IGP, TABLE, BLACKHOLE, UNREACHABLE, BFD)


CF_GRAMMAR

CF_ADDTO(proto, static_proto '}')

static_proto_start: proto_start STATIC
{
  this_proto = proto_config_new(&proto_static, $1);
  static_init_config(STATIC_CFG);
};

static_proto:
   static_proto_start proto_name '{'
 | static_proto proto_item ';'
 | static_proto proto_channel ';' { this_proto->net_type = $2->net_type; }
 | static_proto CHECK LINK bool ';' { STATIC_CFG->check_link = $4; }
 | static_proto IGP TABLE rtable ';' { STATIC_CFG->igp_table = $4; }
 | static_proto stat_route stat_route_opt_list ';' { static_route_finish(); }
 ;

stat_route0: ROUTE net_any {
     this_srt = cfg_allocz(sizeof(struct static_route));
     add_tail(&STATIC_CFG->other_routes, &this_srt->n);
     this_srt->net = $2;
     this_srt_last_cmd = &(this_srt->cmds);
  }
 ;

stat_multipath1:
   VIA ipa ipa_scope {
     last_srt_nh = this_srt_nh;
     this_srt_nh = cfg_allocz(sizeof(struct static_route));
     this_srt_nh->dest = RTD_NONE;
     this_srt_nh->via = $2;
     this_srt_nh->via_if = $3;
     this_srt_nh->if_name = (void *) this_srt; /* really */
     this_srt_nh->use_bfd = -1; /* undefined */
   }
 | stat_multipath1 WEIGHT expr {
     this_srt_nh->weight = $3 - 1;
     if (($3<1) || ($3>256)) cf_error("Weight must be in range 1-256"); 
   }
 | stat_multipath1 BFD bool {
     this_srt_nh->use_bfd = $3; cf_check_bfd($3);
   }
 ;

stat_multipath:
   stat_multipath1 { this_srt->mp_next = this_srt_nh; }
 | stat_multipath stat_multipath1 { last_srt_nh->mp_next = this_srt_nh; }
 ;

stat_route:
   stat_route0 VIA ipa ipa_scope {
      this_srt->dest = RTD_ROUTER;
      this_srt->via = $3;
      this_srt->via_if = $4;
   }
 | stat_route0 VIA TEXT {
      this_srt->dest = RTD_DEVICE;
      this_srt->if_name = $3;
      rem_node(&this_srt->n);
      add_tail(&STATIC_CFG->iface_routes, &this_srt->n);
   }
 | stat_route0 MULTIPATH stat_multipath {
      this_srt->dest = RTD_MULTIPATH;
   }
 | stat_route0 RECURSIVE ipa {
      this_srt->dest = RTDX_RECURSIVE;
      this_srt->via = $3;
   }

 | stat_route0 DROP		{ this_srt->dest = RTD_BLACKHOLE; }
 | stat_route0 REJECT		{ this_srt->dest = RTD_UNREACHABLE; }
 | stat_route0 BLACKHOLE	{ this_srt->dest = RTD_BLACKHOLE; }
 | stat_route0 UNREACHABLE	{ this_srt->dest = RTD_UNREACHABLE; }
 | stat_route0 PROHIBIT		{ this_srt->dest = RTD_PROHIBIT; }
 ;

stat_route_item:
   cmd { *this_srt_last_cmd = $1; this_srt_last_cmd = &($1->next); }
 | BFD bool ';' { this_srt->use_bfd = $2; cf_check_bfd($2); }
 | mpls_stack ';' { this_srt->mpls_stack = $1; }
 ;

stat_route_opts:
   /* empty */
 | stat_route_opts stat_route_item
 ;

stat_route_opt_list:
   /* empty */
 | '{' stat_route_opts '}'
 ;


CF_CLI(SHOW STATIC, optsym, [<name>], [[Show details of static protocol]])
{ static_show(proto_get_named($3, &proto_static)); } ;

CF_CODE

CF_END