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|
/*
* BIRD -- BGP/MPLS IP Virtual Private Networks (L3VPN)
*
* (c) 2022 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2022 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "proto/l3vpn/l3vpn.h"
CF_DEFINES
#define L3VPN_CFG ((struct l3vpn_config *) this_proto)
static void
f_tree_only_rt(struct f_tree *t)
{
/* Parsed degenerate trees have link to the last node in t->right */
t->right = NULL;
while (t)
{
uint type1 = t->from.val.ec >> 48;
uint type2 = t->to.val.ec >> 48;
ASSERT(type1 == type2);
if (!ec_type_is_rt(type1))
cf_error("Extended community is not route target");
ASSERT(!t->right);
t = t->left;
}
}
CF_DECLS
CF_KEYWORDS(L3VPN, ROUTE, IMPORT, EXPORT, TARGET, RD, DISTINGUISHER)
%type <e> l3vpn_targets
%type <cc> l3vpn_channel_start l3vpn_channel
CF_GRAMMAR
proto: l3vpn_proto;
l3vpn_channel_start: net_type_base
{
/* Redefining proto_channel to change default values */
$$ = this_channel = channel_config_get(NULL, net_label[$1], $1, this_proto);
if (!this_channel->copy)
{
this_channel->out_filter = FILTER_ACCEPT;
this_channel->preference = net_val_match($1, NB_IP) ?
DEF_PREF_L3VPN_IMPORT :
DEF_PREF_L3VPN_EXPORT;
}
};
l3vpn_channel: l3vpn_channel_start channel_opt_list channel_end;
l3vpn_proto_start: proto_start L3VPN
{
this_proto = proto_config_new(&proto_l3vpn, $1);
};
l3vpn_proto_item:
proto_item
| l3vpn_channel
| mpls_channel
| RD VPN_RD { L3VPN_CFG->rd = $2; }
| ROUTE DISTINGUISHER VPN_RD { L3VPN_CFG->rd = $3; }
| IMPORT TARGET l3vpn_targets { L3VPN_CFG->import_target = $3; }
| EXPORT TARGET l3vpn_targets { L3VPN_CFG->export_target = $3; }
| ROUTE TARGET l3vpn_targets { L3VPN_CFG->import_target = L3VPN_CFG->export_target = $3; }
;
l3vpn_proto_opts:
/* empty */
| l3vpn_proto_opts l3vpn_proto_item ';'
;
l3vpn_proto:
l3vpn_proto_start proto_name '{' l3vpn_proto_opts '}';
l3vpn_targets:
ec_item { f_tree_only_rt($1); $$ = $1; }
| '[' ec_items ']' { f_tree_only_rt($2); $$ = build_tree($2); }
;
CF_CODE
CF_END
|
