a1f5e514ef
Add proper support for per-nexthop onlink flag in routes to handle next hop addresses that are not covered by interface IP ranges. Supported by kernel and static protocols. Thanks to Vincent Bernat for the idea.
156 lines
3.7 KiB
Text
156 lines
3.7 KiB
Text
/*
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* BIRD -- Static Protocol Configuration
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*
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* (c) 1998--1999 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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CF_HDR
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#include "proto/static/static.h"
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CF_DEFINES
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#define STATIC_CFG ((struct static_config *) this_proto)
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static struct static_route *this_srt, *this_snh;
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static struct f_inst **this_srt_last_cmd;
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static struct static_route *
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static_nexthop_new(void)
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{
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struct static_route *nh = this_srt;
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if (this_snh)
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{
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/* Additional next hop */
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nh = cfg_allocz(sizeof(struct static_route));
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nh->net = this_srt->net;
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this_snh->mp_next = nh;
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}
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nh->dest = RTD_UNICAST;
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nh->mp_head = this_srt;
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return nh;
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};
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static void
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static_route_finish(void)
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{
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if (net_type_match(this_srt->net, NB_DEST) == !this_srt->dest)
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cf_error("Unexpected or missing nexthop/type");
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}
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CF_DECLS
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CF_KEYWORDS(STATIC, ROUTE, VIA, DROP, REJECT, PROHIBIT, PREFERENCE, CHECK, LINK)
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CF_KEYWORDS(ONLINK, WEIGHT, RECURSIVE, IGP, TABLE, BLACKHOLE, UNREACHABLE, BFD, MPLS)
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CF_GRAMMAR
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CF_ADDTO(proto, static_proto '}')
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static_proto_start: proto_start STATIC
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{
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this_proto = proto_config_new(&proto_static, $1);
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init_list(&STATIC_CFG->routes);
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};
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static_proto:
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static_proto_start proto_name '{'
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| static_proto proto_item ';'
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| static_proto proto_channel ';' { this_proto->net_type = $2->net_type; }
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| static_proto CHECK LINK bool ';' { STATIC_CFG->check_link = $4; }
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| static_proto IGP TABLE rtable ';' {
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if ($4->addr_type == NET_IP4)
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STATIC_CFG->igp_table_ip4 = $4;
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else if ($4->addr_type == NET_IP6)
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STATIC_CFG->igp_table_ip6 = $4;
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else
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cf_error("Incompatible IGP table type");
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}
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| static_proto stat_route stat_route_opt_list ';' { static_route_finish(); }
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;
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stat_nexthop:
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VIA ipa ipa_scope {
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this_snh = static_nexthop_new();
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this_snh->via = $2;
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this_snh->iface = $3;
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}
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| VIA TEXT {
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this_snh = static_nexthop_new();
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this_snh->via = IPA_NONE;
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this_snh->iface = if_get_by_name($2);
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}
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| stat_nexthop MPLS label_stack {
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this_snh->mls = $3;
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}
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| stat_nexthop ONLINK bool {
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this_snh->onlink = $3;
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}
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| stat_nexthop WEIGHT expr {
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this_snh->weight = $3 - 1;
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if (($3<1) || ($3>256)) cf_error("Weight must be in range 1-256");
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}
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| stat_nexthop BFD bool {
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this_snh->use_bfd = $3; cf_check_bfd($3);
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}
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;
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stat_nexthops:
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stat_nexthop
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| stat_nexthops stat_nexthop
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;
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stat_route0: ROUTE net_any {
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this_srt = cfg_allocz(sizeof(struct static_route));
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add_tail(&STATIC_CFG->routes, &this_srt->n);
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this_srt->net = $2;
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this_srt_last_cmd = &(this_srt->cmds);
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this_srt->mp_next = NULL;
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this_snh = NULL;
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}
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;
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stat_route:
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stat_route0 stat_nexthops
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| stat_route0 RECURSIVE ipa {
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this_srt->dest = RTDX_RECURSIVE;
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this_srt->via = $3;
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}
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| stat_route0 RECURSIVE ipa MPLS label_stack {
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this_srt->dest = RTDX_RECURSIVE;
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this_srt->via = $3;
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this_srt->mls = $5;
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}
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| stat_route0 { this_srt->dest = RTD_NONE; }
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| stat_route0 DROP { this_srt->dest = RTD_BLACKHOLE; }
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| stat_route0 REJECT { this_srt->dest = RTD_UNREACHABLE; }
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| stat_route0 BLACKHOLE { this_srt->dest = RTD_BLACKHOLE; }
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| stat_route0 UNREACHABLE { this_srt->dest = RTD_UNREACHABLE; }
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| stat_route0 PROHIBIT { this_srt->dest = RTD_PROHIBIT; }
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;
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stat_route_item:
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cmd { *this_srt_last_cmd = $1; this_srt_last_cmd = &($1->next); }
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;
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stat_route_opts:
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/* empty */
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| stat_route_opts stat_route_item
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;
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stat_route_opt_list:
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/* empty */
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| '{' stat_route_opts '}'
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;
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CF_CLI(SHOW STATIC, optsym, [<name>], [[Show details of static protocol]])
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{ static_show(proto_get_named($3, &proto_static)); } ;
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CF_CODE
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CF_END
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