145368f547
Fixes cases where the same network or external route are propagated by several OSPF routes and some other corner cases in next hop construction and ECMP. Allows to specify whether external routes should be merged. Thanks to Peter Christensen for the original patch.
464 lines
16 KiB
Text
464 lines
16 KiB
Text
/*
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* BIRD -- OSPF Configuration
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*
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* (c) 1999--2004 Ondrej Filip <feela@network.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/ospf/ospf.h"
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CF_DEFINES
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#define OSPF_CFG ((struct ospf_config *) this_proto)
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#define OSPF_PATT ((struct ospf_iface_patt *) this_ipatt)
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static struct ospf_area_config *this_area;
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static struct nbma_node *this_nbma;
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static list *this_nets;
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static struct area_net_config *this_pref;
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static struct ospf_stubnet_config *this_stubnet;
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#ifdef OSPFv2
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static void
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ospf_iface_finish(void)
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{
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struct ospf_iface_patt *ip = OSPF_PATT;
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if (ip->deadint == 0)
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ip->deadint = ip->deadc * ip->helloint;
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ip->passwords = get_passwords();
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if ((ip->autype == OSPF_AUTH_CRYPT) && (ip->helloint < 5))
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log(L_WARN "Hello or poll interval less that 5 makes cryptographic authenication prone to replay attacks");
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if ((ip->autype == OSPF_AUTH_NONE) && (ip->passwords != NULL))
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log(L_WARN "Password option without authentication option does not make sense");
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}
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#endif
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#ifdef OSPFv3
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static void
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ospf_iface_finish(void)
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{
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struct ospf_iface_patt *ip = OSPF_PATT;
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if (ip->deadint == 0)
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ip->deadint = ip->deadc * ip->helloint;
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if ((ip->autype != OSPF_AUTH_NONE) || (get_passwords() != NULL))
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cf_error("Authentication not supported in OSPFv3");
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}
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#endif
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static void
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ospf_area_finish(void)
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{
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if ((this_area->areaid == 0) && (this_area->type != OPT_E))
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cf_error("Backbone area cannot be stub/NSSA");
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if (this_area->summary && (this_area->type == OPT_E))
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cf_error("Only Stub/NSSA areas can use summary propagation");
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if (this_area->default_nssa && ((this_area->type != OPT_N) || ! this_area->summary))
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cf_error("Only NSSA areas with summary propagation can use NSSA default route");
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if ((this_area->default_cost & LSA_EXT_EBIT) && ! this_area->default_nssa)
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cf_error("Only NSSA default route can use type 2 metric");
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}
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static void
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ospf_proto_finish(void)
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{
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struct ospf_config *cf = OSPF_CFG;
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if (EMPTY_LIST(cf->area_list))
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cf_error( "No configured areas in OSPF");
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int areano = 0;
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int backbone = 0;
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struct ospf_area_config *ac;
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WALK_LIST(ac, cf->area_list)
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{
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areano++;
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if (ac->areaid == 0)
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backbone = 1;
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}
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cf->abr = areano > 1;
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if (cf->abr && !backbone)
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{
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struct ospf_area_config *ac = cfg_allocz(sizeof(struct ospf_area_config));
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ac->type = OPT_E; /* Backbone is non-stub */
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add_head(&cf->area_list, NODE ac);
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init_list(&ac->patt_list);
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init_list(&ac->net_list);
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init_list(&ac->enet_list);
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init_list(&ac->stubnet_list);
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}
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if (!cf->abr && !EMPTY_LIST(cf->vlink_list))
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cf_error( "Vlinks cannot be used on single area router");
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}
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static inline void
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check_defcost(int cost)
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{
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if ((cost <= 0) || (cost >= LSINFINITY))
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cf_error("Default cost must be in range 1-%d", LSINFINITY-1);
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}
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static inline void
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set_instance_id(unsigned id)
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{
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#ifdef OSPFv3
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OSPF_PATT->instance_id = id;
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#else
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cf_error("Instance ID requires OSPFv3");
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#endif
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}
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CF_DECLS
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CF_KEYWORDS(OSPF, AREA, OSPF_METRIC1, OSPF_METRIC2, OSPF_TAG, OSPF_ROUTER_ID)
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CF_KEYWORDS(NEIGHBORS, RFC1583COMPAT, STUB, TICK, COST, COST2, RETRANSMIT)
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CF_KEYWORDS(HELLO, TRANSMIT, PRIORITY, DEAD, TYPE, BROADCAST, BCAST, DEFAULT)
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CF_KEYWORDS(NONBROADCAST, NBMA, POINTOPOINT, PTP, POINTOMULTIPOINT, PTMP)
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CF_KEYWORDS(NONE, SIMPLE, AUTHENTICATION, STRICT, CRYPTOGRAPHIC, TTL, SECURITY)
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CF_KEYWORDS(ELIGIBLE, POLL, NETWORKS, HIDDEN, VIRTUAL, CHECK, LINK, ONLY, BFD)
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CF_KEYWORDS(RX, BUFFER, LARGE, NORMAL, STUBNET, HIDDEN, SUMMARY, TAG, EXTERNAL)
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CF_KEYWORDS(WAIT, DELAY, LSADB, ECMP, LIMIT, WEIGHT, NSSA, TRANSLATOR, STABILITY)
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CF_KEYWORDS(GLOBAL, LSID, ROUTER, SELF, INSTANCE, REAL, NETMASK, TX, PRIORITY, LENGTH)
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CF_KEYWORDS(SECONDARY, MERGE)
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%type <t> opttext
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%type <ld> lsadb_args
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%type <i> nbma_eligible
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CF_GRAMMAR
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CF_ADDTO(proto, ospf_proto '}' { ospf_proto_finish(); } )
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ospf_proto_start: proto_start OSPF {
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this_proto = proto_config_new(&proto_ospf, sizeof(struct ospf_config), $1);
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init_list(&OSPF_CFG->area_list);
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init_list(&OSPF_CFG->vlink_list);
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OSPF_CFG->rfc1583 = DEFAULT_RFC1583;
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OSPF_CFG->tick = DEFAULT_OSPFTICK;
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}
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;
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ospf_proto:
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ospf_proto_start proto_name '{'
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| ospf_proto ospf_proto_item ';'
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;
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ospf_proto_item:
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proto_item
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| RFC1583COMPAT bool { OSPF_CFG->rfc1583 = $2; }
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| STUB ROUTER bool { OSPF_CFG->stub_router = $3; }
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| ECMP bool { OSPF_CFG->ecmp = $2 ? DEFAULT_ECMP_LIMIT : 0; }
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| ECMP bool LIMIT expr { OSPF_CFG->ecmp = $2 ? $4 : 0; if ($4 < 0) cf_error("ECMP limit cannot be negative"); }
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| MERGE EXTERNAL bool { OSPF_CFG->merge_external = $3; }
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| TICK expr { OSPF_CFG->tick = $2; if($2<=0) cf_error("Tick must be greater than zero"); }
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| ospf_area
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;
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ospf_area_start: AREA idval {
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this_area = cfg_allocz(sizeof(struct ospf_area_config));
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add_tail(&OSPF_CFG->area_list, NODE this_area);
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this_area->areaid = $2;
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this_area->default_cost = DEFAULT_STUB_COST;
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this_area->type = OPT_E;
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this_area->transint = DEFAULT_TRANSINT;
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init_list(&this_area->patt_list);
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init_list(&this_area->net_list);
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init_list(&this_area->enet_list);
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init_list(&this_area->stubnet_list);
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}
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;
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ospf_area: ospf_area_start '{' ospf_area_opts '}' { ospf_area_finish(); }
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;
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ospf_area_opts:
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/* empty */
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| ospf_area_opts ospf_area_item ';'
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;
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ospf_area_item:
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STUB bool { this_area->type = $2 ? 0 : OPT_E; /* We should remove the option */ }
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| NSSA { this_area->type = OPT_N; }
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| SUMMARY bool { this_area->summary = $2; }
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| DEFAULT NSSA bool { this_area->default_nssa = $3; }
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| DEFAULT COST expr { this_area->default_cost = $3; check_defcost($3); }
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| DEFAULT COST2 expr { this_area->default_cost = $3 | LSA_EXT_EBIT; check_defcost($3); }
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| STUB COST expr { this_area->default_cost = $3; check_defcost($3); }
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| TRANSLATOR bool { this_area->translator = $2; }
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| TRANSLATOR STABILITY expr { this_area->transint = $3; }
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| NETWORKS { this_nets = &this_area->net_list; } '{' pref_list '}'
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| EXTERNAL { this_nets = &this_area->enet_list; } '{' pref_list '}'
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| STUBNET ospf_stubnet
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| INTERFACE ospf_iface
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| ospf_vlink
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;
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ospf_stubnet:
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ospf_stubnet_start '{' ospf_stubnet_opts '}'
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| ospf_stubnet_start
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;
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ospf_stubnet_start:
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prefix {
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this_stubnet = cfg_allocz(sizeof(struct ospf_stubnet_config));
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add_tail(&this_area->stubnet_list, NODE this_stubnet);
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this_stubnet->px = $1;
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this_stubnet->cost = COST_D;
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}
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;
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ospf_stubnet_opts:
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/* empty */
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| ospf_stubnet_opts ospf_stubnet_item ';'
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;
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ospf_stubnet_item:
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HIDDEN bool { this_stubnet->hidden = $2; }
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| SUMMARY bool { this_stubnet->summary = $2; }
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| COST expr { this_stubnet->cost = $2; }
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;
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ospf_vlink:
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ospf_vlink_start ospf_instance_id '{' ospf_vlink_opts '}' { ospf_iface_finish(); }
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| ospf_vlink_start ospf_instance_id { ospf_iface_finish(); }
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;
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ospf_vlink_opts:
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/* empty */
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| ospf_vlink_opts ospf_vlink_item ';'
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;
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ospf_vlink_item:
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| HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
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| RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
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| TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
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| WAIT expr { OSPF_PATT->waitint = $2 ; }
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| DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
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| DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
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| AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
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| AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
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| AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
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| password_list
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;
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ospf_vlink_start: VIRTUAL LINK idval
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{
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if (this_area->areaid == 0) cf_error("Virtual link cannot be in backbone");
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this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
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add_tail(&OSPF_CFG->vlink_list, NODE this_ipatt);
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init_list(&this_ipatt->ipn_list);
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OSPF_PATT->voa = this_area->areaid;
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OSPF_PATT->vid = $3;
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OSPF_PATT->helloint = HELLOINT_D;
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OSPF_PATT->rxmtint = RXMTINT_D;
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OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
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OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
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OSPF_PATT->deadc = DEADC_D;
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OSPF_PATT->deadint = 0;
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OSPF_PATT->type = OSPF_IT_VLINK;
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init_list(&OSPF_PATT->nbma_list);
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OSPF_PATT->autype = OSPF_AUTH_NONE;
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reset_passwords();
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}
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;
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ospf_iface_item:
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COST expr { OSPF_PATT->cost = $2 ; if (($2<=0) || ($2>65535)) cf_error("Cost must be in range 1-65535"); }
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| HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
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| POLL expr { OSPF_PATT->pollint = $2 ; if ($2<=0) cf_error("Poll int must be greater than zero"); }
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| RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
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| WAIT expr { OSPF_PATT->waitint = $2 ; }
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| DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
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| DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
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| TYPE BROADCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
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| TYPE BCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
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| TYPE NONBROADCAST { OSPF_PATT->type = OSPF_IT_NBMA ; }
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| TYPE NBMA { OSPF_PATT->type = OSPF_IT_NBMA ; }
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| TYPE POINTOPOINT { OSPF_PATT->type = OSPF_IT_PTP ; }
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| TYPE PTP { OSPF_PATT->type = OSPF_IT_PTP ; }
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| TYPE POINTOMULTIPOINT { OSPF_PATT->type = OSPF_IT_PTMP ; }
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| TYPE PTMP { OSPF_PATT->type = OSPF_IT_PTMP ; }
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| REAL BROADCAST bool { OSPF_PATT->real_bcast = $3; if (OSPF_VERSION != 2) cf_error("Real broadcast option requires OSPFv2"); }
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| PTP NETMASK bool { OSPF_PATT->ptp_netmask = $3; if (OSPF_VERSION != 2) cf_error("Real netmask option requires OSPFv2"); }
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| TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
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| PRIORITY expr { OSPF_PATT->priority = $2 ; if (($2<0) || ($2>255)) cf_error("Priority must be in range 0-255"); }
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| STRICT NONBROADCAST bool { OSPF_PATT->strictnbma = $3 ; }
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| STUB bool { OSPF_PATT->stub = $2 ; }
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| CHECK LINK bool { OSPF_PATT->check_link = $3; }
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| ECMP WEIGHT expr { OSPF_PATT->ecmp_weight = $3 - 1; if (($3<1) || ($3>256)) cf_error("ECMP weight must be in range 1-256"); }
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| NEIGHBORS '{' nbma_list '}'
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| AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
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| AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
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| AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
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| RX BUFFER NORMAL { OSPF_PATT->rx_buffer = 0; }
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| RX BUFFER LARGE { OSPF_PATT->rx_buffer = OSPF_MAX_PKT_SIZE; }
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| RX BUFFER expr { OSPF_PATT->rx_buffer = $3; if (($3 < OSPF_MIN_PKT_SIZE) || ($3 > OSPF_MAX_PKT_SIZE)) cf_error("Buffer size must be in range 256-65535"); }
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| TX tos { OSPF_PATT->tx_tos = $2; }
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| TX PRIORITY expr { OSPF_PATT->tx_priority = $3; }
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| TX LENGTH expr { OSPF_PATT->tx_length = $3; if (($3 < OSPF_MIN_PKT_SIZE) || ($3 > OSPF_MAX_PKT_SIZE)) cf_error("TX length must be in range 256-65535"); }
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| TTL SECURITY bool { OSPF_PATT->ttl_security = $3; }
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| TTL SECURITY TX ONLY { OSPF_PATT->ttl_security = 2; }
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| BFD bool { OSPF_PATT->bfd = $2; cf_check_bfd($2); }
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| SECONDARY bool { OSPF_PATT->bsd_secondary = $2; }
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| password_list
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;
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pref_list:
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/* empty */
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| pref_list pref_item
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;
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pref_item: pref_base pref_opt ';' ;
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pref_base: prefix
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{
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this_pref = cfg_allocz(sizeof(struct area_net_config));
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add_tail(this_nets, NODE this_pref);
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this_pref->px.addr = $1.addr;
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this_pref->px.len = $1.len;
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}
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;
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pref_opt:
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/* empty */
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| HIDDEN { this_pref->hidden = 1; }
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| TAG expr { this_pref->tag = $2; }
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;
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nbma_list:
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/* empty */
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| nbma_list nbma_item
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;
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nbma_eligible:
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/* empty */ { $$ = 0; }
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| ELIGIBLE { $$ = 1; }
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;
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nbma_item: IPA nbma_eligible ';'
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{
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this_nbma = cfg_allocz(sizeof(struct nbma_node));
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add_tail(&OSPF_PATT->nbma_list, NODE this_nbma);
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this_nbma->ip=$1;
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this_nbma->eligible=$2;
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}
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;
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ospf_iface_start:
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{
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this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
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add_tail(&this_area->patt_list, NODE this_ipatt);
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init_list(&this_ipatt->ipn_list);
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OSPF_PATT->cost = COST_D;
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OSPF_PATT->helloint = HELLOINT_D;
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OSPF_PATT->pollint = POLLINT_D;
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OSPF_PATT->rxmtint = RXMTINT_D;
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OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
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OSPF_PATT->priority = PRIORITY_D;
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OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
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OSPF_PATT->deadc = DEADC_D;
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OSPF_PATT->deadint = 0;
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OSPF_PATT->type = OSPF_IT_UNDEF;
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init_list(&OSPF_PATT->nbma_list);
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OSPF_PATT->autype = OSPF_AUTH_NONE;
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OSPF_PATT->ptp_netmask = 2; /* not specified */
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OSPF_PATT->tx_tos = IP_PREC_INTERNET_CONTROL;
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OSPF_PATT->tx_priority = sk_priority_control;
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reset_passwords();
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}
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;
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ospf_instance_id:
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/* empty */
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| INSTANCE expr { set_instance_id($2); }
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;
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ospf_iface_patt_list:
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iface_patt_list { if (OSPF_VERSION == 3) iface_patt_check(); } ospf_instance_id
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;
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ospf_iface_opts:
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/* empty */
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| ospf_iface_opts ospf_iface_item ';'
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;
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ospf_iface_opt_list:
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/* empty */
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| '{' ospf_iface_opts '}'
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;
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|
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ospf_iface:
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ospf_iface_start ospf_iface_patt_list ospf_iface_opt_list { ospf_iface_finish(); }
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;
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|
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|
opttext:
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TEXT
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|
| /* empty */ { $$ = NULL; }
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;
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|
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CF_ADDTO(dynamic_attr, OSPF_METRIC1 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC1); })
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CF_ADDTO(dynamic_attr, OSPF_METRIC2 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC2); })
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CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_TAG); })
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|
CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID | EAF_TEMP, T_QUAD, EA_OSPF_ROUTER_ID); })
|
|
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|
CF_CLI_HELP(SHOW OSPF, ..., [[Show information about OSPF protocol]]);
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CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol XXX]])
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{ ospf_sh(proto_get_named($3, &proto_ospf)); };
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|
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|
CF_CLI(SHOW OSPF NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about OSPF neighbors]])
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{ ospf_sh_neigh(proto_get_named($4, &proto_ospf), $5); };
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|
|
|
CF_CLI(SHOW OSPF INTERFACE, optsym opttext, [<name>] [\"<interface>\"], [[Show information about interface]])
|
|
{ ospf_sh_iface(proto_get_named($4, &proto_ospf), $5); };
|
|
|
|
CF_CLI_HELP(SHOW OSPF TOPOLOGY, [all] [<name>], [[Show information about OSPF network topology]])
|
|
|
|
CF_CLI(SHOW OSPF TOPOLOGY, optsym opttext, [<name>], [[Show information about reachable OSPF network topology]])
|
|
{ ospf_sh_state(proto_get_named($4, &proto_ospf), 0, 1); };
|
|
|
|
CF_CLI(SHOW OSPF TOPOLOGY ALL, optsym opttext, [<name>], [[Show information about all OSPF network topology]])
|
|
{ ospf_sh_state(proto_get_named($5, &proto_ospf), 0, 0); };
|
|
|
|
CF_CLI_HELP(SHOW OSPF STATE, [all] [<name>], [[Show information about OSPF network state]])
|
|
|
|
CF_CLI(SHOW OSPF STATE, optsym opttext, [<name>], [[Show information about reachable OSPF network state]])
|
|
{ ospf_sh_state(proto_get_named($4, &proto_ospf), 1, 1); };
|
|
|
|
CF_CLI(SHOW OSPF STATE ALL, optsym opttext, [<name>], [[Show information about all OSPF network state]])
|
|
{ ospf_sh_state(proto_get_named($5, &proto_ospf), 1, 0); };
|
|
|
|
CF_CLI_HELP(SHOW OSPF LSADB, ..., [[Show content of OSPF LSA database]]);
|
|
CF_CLI(SHOW OSPF LSADB, lsadb_args, [global | area <id> | link] [type <num>] [lsid <id>] [self | router <id>] [<proto>], [[Show content of OSPF LSA database]])
|
|
{ ospf_sh_lsadb($4); };
|
|
|
|
lsadb_args:
|
|
/* empty */ {
|
|
$$ = cfg_allocz(sizeof(struct lsadb_show_data));
|
|
}
|
|
| lsadb_args GLOBAL { $$ = $1; $$->scope = LSA_SCOPE_AS; }
|
|
| lsadb_args AREA idval { $$ = $1; $$->scope = LSA_SCOPE_AREA; $$->area = $3; }
|
|
| lsadb_args LINK { $$ = $1; $$->scope = 1; /* hack, 0 is no filter */ }
|
|
| lsadb_args TYPE NUM { $$ = $1; $$->type = $3; }
|
|
| lsadb_args LSID idval { $$ = $1; $$->lsid = $3; }
|
|
| lsadb_args SELF { $$ = $1; $$->router = SH_ROUTER_SELF; }
|
|
| lsadb_args ROUTER idval { $$ = $1; $$->router = $3; }
|
|
| lsadb_args SYM { $$ = $1; $$->name = $2; }
|
|
;
|
|
|
|
CF_CODE
|
|
|
|
CF_END
|