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|
/*
* 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_snh;
static struct f_inst *this_srt_cmds, *this_srt_last_cmd;
static struct static_route *
static_nexthop_new(void)
{
struct static_route *nh = this_srt;
if (this_snh)
{
/* Additional next hop */
nh = cfg_allocz(sizeof(struct static_route));
nh->net = this_srt->net;
this_snh->mp_next = nh;
}
nh->dest = RTD_UNICAST;
nh->mp_head = this_srt;
return nh;
};
static void
static_route_finish(void)
{
if (net_type_match(this_srt->net, NB_DEST) == !this_srt->dest)
cf_error("Unexpected or missing nexthop/type");
this_srt->cmds = f_linearize(this_srt_cmds, 0);
}
CF_DECLS
CF_KEYWORDS(STATIC, ROUTE, VIA, DROP, REJECT, PROHIBIT, PREFERENCE, CHECK, LINK, DEV)
CF_KEYWORDS(ONLINK, WEIGHT, RECURSIVE, IGP, TABLE, BLACKHOLE, UNREACHABLE, BFD, MPLS)
CF_GRAMMAR
proto: static_proto '}' ;
static_proto_start: proto_start STATIC
{
this_proto = proto_config_new(&proto_static, $1);
init_list(&STATIC_CFG->routes);
};
static_proto:
static_proto_start proto_name '{'
| static_proto proto_item ';'
| static_proto proto_channel ';' { this_proto->net_type = $2->net_type; }
| static_proto mpls_channel ';'
| static_proto CHECK LINK bool ';' { STATIC_CFG->check_link = $4; }
| static_proto IGP TABLE rtable ';' {
if ($4->addr_type == NET_IP4)
STATIC_CFG->igp_table_ip4 = $4;
else if ($4->addr_type == NET_IP6)
STATIC_CFG->igp_table_ip6 = $4;
else
cf_error("Incompatible IGP table type");
}
| static_proto stat_route stat_route_opt_list ';' { static_route_finish(); }
;
stat_nexthop:
VIA ipa ipa_scope {
this_snh = static_nexthop_new();
this_snh->via = $2;
this_snh->iface = $3;
}
| VIA TEXT {
this_snh = static_nexthop_new();
this_snh->via = IPA_NONE;
this_snh->iface = if_get_by_name($2);
}
| stat_nexthop DEV TEXT {
this_snh->iface = if_get_by_name($3);
}
| stat_nexthop MPLS label_stack {
this_snh->mls = $3;
}
| stat_nexthop ONLINK bool {
this_snh->onlink = $3;
if (this_snh->use_bfd && this_snh->onlink)
cf_error("Options 'bfd' and 'onlink' cannot be combined");
}
| stat_nexthop WEIGHT expr {
this_snh->weight = $3 - 1;
if (($3<1) || ($3>256)) cf_error("Weight must be in range 1-256");
}
| stat_nexthop BFD bool {
this_snh->use_bfd = $3; cf_check_bfd($3);
if (this_snh->use_bfd && this_snh->onlink)
cf_error("Options 'bfd' and 'onlink' cannot be combined");
}
;
stat_nexthops:
stat_nexthop
| stat_nexthops stat_nexthop
;
stat_mpls:
/* empty */
| MPLS expr { this_srt->mpls_label = $2; if ($2 >= MPLS_MAX_LABEL) cf_error("MPLS label must be less than 2^20"); }
;
stat_route0: ROUTE net_any {
this_srt = cfg_allocz(sizeof(struct static_route));
add_tail(&STATIC_CFG->routes, &this_srt->n);
this_srt->net = $2;
this_srt->mpls_label = (uint) -1;
this_srt_cmds = NULL;
this_srt_last_cmd = NULL;
this_srt->mp_next = NULL;
this_snh = NULL;
} stat_mpls
;
stat_route:
stat_route0 stat_nexthops
| stat_route0 RECURSIVE ipa {
this_srt->dest = RTDX_RECURSIVE;
this_srt->via = $3;
}
| stat_route0 RECURSIVE ipa MPLS label_stack {
this_srt->dest = RTDX_RECURSIVE;
this_srt->via = $3;
this_srt->mls = $5;
}
| stat_route0 { this_srt->dest = RTD_NONE; }
| 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 {
if (this_srt_last_cmd)
this_srt_last_cmd->next = $1;
else
this_srt_cmds = $1;
this_srt_last_cmd = $1;
}
;
stat_route_opts:
/* empty */
| stat_route_opts stat_route_item
;
stat_route_opt_list:
/* empty */
| '{' stat_route_opts '}'
;
CF_CLI(SHOW STATIC, optproto, [<name>], [[Show details of static protocol]])
{ PROTO_WALK_CMD($3, &proto_static, p) static_show(p); } ;
CF_CODE
CF_END
|
