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5bd734317c
The patch implements long-lived graceful restart for BGP, namely draft-uttaro-idr-bgp-persistence-03.
298 lines
12 KiB
Plaintext
298 lines
12 KiB
Plaintext
/*
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* BIRD -- Border Gateway Protocol Configuration
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*
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* (c) 2000 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/bgp/bgp.h"
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CF_DEFINES
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#define BGP_CFG ((struct bgp_config *) this_proto)
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#define BGP_CC ((struct bgp_channel_config *) this_channel)
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CF_DECLS
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CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE,
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MULTIHOP, STARTUP, VIA, NEXT, HOP, SELF, DEFAULT, PATH, METRIC, ERROR,
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START, DELAY, FORGET, WAIT, ENABLE, DISABLE, AFTER, BGP_PATH,
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BGP_LOCAL_PREF, BGP_MED, BGP_ORIGIN, BGP_NEXT_HOP, BGP_ATOMIC_AGGR,
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BGP_AGGREGATOR, BGP_COMMUNITY, BGP_EXT_COMMUNITY, BGP_LARGE_COMMUNITY,
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SOURCE, ADDRESS, PASSWORD, RR, RS, CLIENT, CLUSTER, ID, AS4, ADVERTISE,
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IPV4, CAPABILITIES, LIMIT, PASSIVE, PREFER, OLDER, MISSING, LLADDR,
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DROP, IGNORE, ROUTE, REFRESH, INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID,
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BGP_CLUSTER_LIST, IGP, TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL,
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SECURITY, DETERMINISTIC, SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX,
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GRACEFUL, RESTART, AWARE, CHECK, LINK, PORT, EXTENDED, MESSAGES, SETKEY,
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STRICT, BIND, CONFEDERATION, MEMBER, MULTICAST, FLOW4, FLOW6, LONG,
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LIVED, STALE)
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%type <i32> bgp_afi
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CF_KEYWORDS(CEASE, PREFIX, LIMIT, HIT, ADMINISTRATIVE, SHUTDOWN, RESET, PEER,
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CONFIGURATION, CHANGE, DECONFIGURED, CONNECTION, REJECTED, COLLISION,
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OUT, OF, RESOURCES)
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%type<i> bgp_cease_mask bgp_cease_list bgp_cease_flag
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CF_GRAMMAR
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proto: bgp_proto '}' ;
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bgp_proto_start: proto_start BGP {
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this_proto = proto_config_new(&proto_bgp, $1);
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BGP_CFG->local_port = BGP_PORT;
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BGP_CFG->remote_port = BGP_PORT;
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BGP_CFG->multihop = -1; /* undefined */
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BGP_CFG->hold_time = 240;
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BGP_CFG->initial_hold_time = 240;
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BGP_CFG->compare_path_lengths = 1;
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BGP_CFG->igp_metric = 1;
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BGP_CFG->connect_delay_time = 5;
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BGP_CFG->connect_retry_time = 120;
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BGP_CFG->error_amnesia_time = 300;
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BGP_CFG->error_delay_time_min = 60;
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BGP_CFG->error_delay_time_max = 300;
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BGP_CFG->enable_refresh = 1;
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BGP_CFG->enable_as4 = 1;
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BGP_CFG->capabilities = 2;
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BGP_CFG->interpret_communities = 1;
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BGP_CFG->default_local_pref = 100;
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BGP_CFG->gr_mode = BGP_GR_AWARE;
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BGP_CFG->gr_time = 120;
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BGP_CFG->llgr_mode = -1;
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BGP_CFG->llgr_time = 3600;
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BGP_CFG->setkey = 1;
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BGP_CFG->check_link = -1;
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}
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;
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bgp_loc_opts:
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/* empty */
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| bgp_loc_opts PORT expr { BGP_CFG->local_port = $3; if (($3<1) || ($3>65535)) cf_error("Invalid port number"); }
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| bgp_loc_opts AS expr { BGP_CFG->local_as = $3; }
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;
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bgp_nbr_opts:
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/* empty */
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| bgp_nbr_opts PORT expr { BGP_CFG->remote_port = $3; if (($3<1) || ($3>65535)) cf_error("Invalid port number"); }
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| bgp_nbr_opts AS expr { BGP_CFG->remote_as = $3; }
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;
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bgp_cease_mask:
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/* true -> all except connection collision */
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bool { $$ = $1 ? ~(1 << 7) : 0; }
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| '{' bgp_cease_list '}' { $$ = $2; }
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;
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bgp_cease_list:
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bgp_cease_flag
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| bgp_cease_list ',' bgp_cease_flag { $$ = $1 | $3; }
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;
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bgp_cease_flag:
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CEASE { $$ = 1 << 0; }
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| PREFIX LIMIT HIT { $$ = 1 << 1; }
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| ADMINISTRATIVE SHUTDOWN { $$ = 1 << 2; }
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| PEER DECONFIGURED { $$ = 1 << 3; }
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| ADMINISTRATIVE RESET { $$ = 1 << 4; }
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| CONNECTION REJECTED { $$ = 1 << 5; }
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| CONFIGURATION CHANGE { $$ = 1 << 6; }
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| CONNECTION COLLISION { $$ = 1 << 7; }
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| OUT OF RESOURCES { $$ = 1 << 8; }
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;
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bgp_proto:
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bgp_proto_start proto_name '{'
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| bgp_proto proto_item ';'
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| bgp_proto bgp_proto_channel ';'
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| bgp_proto LOCAL bgp_loc_opts ';'
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| bgp_proto LOCAL ipa ipa_scope bgp_loc_opts ';' {
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BGP_CFG->local_ip = $3;
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if ($4) BGP_CFG->iface = $4;
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}
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| bgp_proto NEIGHBOR bgp_nbr_opts ';'
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| bgp_proto NEIGHBOR ipa ipa_scope bgp_nbr_opts ';' {
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if (ipa_nonzero(BGP_CFG->remote_ip))
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cf_error("Only one neighbor per BGP instance is allowed");
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BGP_CFG->remote_ip = $3;
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if ($4) BGP_CFG->iface = $4;
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}
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| bgp_proto INTERFACE TEXT ';' { BGP_CFG->iface = if_get_by_name($3); }
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| bgp_proto RR CLUSTER ID idval ';' { BGP_CFG->rr_cluster_id = $5; }
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| bgp_proto RR CLIENT bool ';' { BGP_CFG->rr_client = $4; }
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| bgp_proto RS CLIENT bool ';' { BGP_CFG->rs_client = $4; }
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| bgp_proto CONFEDERATION expr ';' { BGP_CFG->confederation = $3; }
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| bgp_proto CONFEDERATION MEMBER bool ';' { BGP_CFG->confederation_member = $4; }
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| bgp_proto HOLD TIME expr ';' { BGP_CFG->hold_time = $4; }
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| bgp_proto STARTUP HOLD TIME expr ';' { BGP_CFG->initial_hold_time = $5; }
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| bgp_proto DIRECT ';' { BGP_CFG->multihop = 0; }
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| bgp_proto MULTIHOP ';' { BGP_CFG->multihop = 64; }
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| bgp_proto MULTIHOP expr ';' { BGP_CFG->multihop = $3; if (($3<1) || ($3>255)) cf_error("Multihop must be in range 1-255"); }
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| bgp_proto STRICT BIND bool ';' { BGP_CFG->strict_bind = $4; }
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| bgp_proto PATH METRIC bool ';' { BGP_CFG->compare_path_lengths = $4; }
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| bgp_proto MED METRIC bool ';' { BGP_CFG->med_metric = $4; }
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| bgp_proto IGP METRIC bool ';' { BGP_CFG->igp_metric = $4; }
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| bgp_proto PREFER OLDER bool ';' { BGP_CFG->prefer_older = $4; }
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| bgp_proto DETERMINISTIC MED bool ';' { BGP_CFG->deterministic_med = $4; }
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| bgp_proto DEFAULT BGP_MED expr ';' { BGP_CFG->default_med = $4; }
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| bgp_proto DEFAULT BGP_LOCAL_PREF expr ';' { BGP_CFG->default_local_pref = $4; }
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| bgp_proto SOURCE ADDRESS ipa ';' { BGP_CFG->local_ip = $4; }
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| bgp_proto START DELAY TIME expr ';' { BGP_CFG->connect_delay_time = $5; log(L_WARN "%s: Start delay time option is deprecated, use connect delay time", this_proto->name); }
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| bgp_proto CONNECT DELAY TIME expr ';' { BGP_CFG->connect_delay_time = $5; }
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| bgp_proto CONNECT RETRY TIME expr ';' { BGP_CFG->connect_retry_time = $5; }
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| bgp_proto KEEPALIVE TIME expr ';' { BGP_CFG->keepalive_time = $4; }
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| bgp_proto ERROR FORGET TIME expr ';' { BGP_CFG->error_amnesia_time = $5; }
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| bgp_proto ERROR WAIT TIME expr ',' expr ';' { BGP_CFG->error_delay_time_min = $5; BGP_CFG->error_delay_time_max = $7; }
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| bgp_proto DISABLE AFTER ERROR bool ';' { BGP_CFG->disable_after_error = $5; }
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| bgp_proto DISABLE AFTER CEASE bgp_cease_mask ';' { BGP_CFG->disable_after_cease = $5; }
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| bgp_proto ENABLE ROUTE REFRESH bool ';' { BGP_CFG->enable_refresh = $5; }
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| bgp_proto ENABLE AS4 bool ';' { BGP_CFG->enable_as4 = $4; }
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| bgp_proto ENABLE EXTENDED MESSAGES bool ';' { BGP_CFG->enable_extended_messages = $5; }
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| bgp_proto CAPABILITIES bool ';' { BGP_CFG->capabilities = $3; }
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| bgp_proto PASSWORD text ';' { BGP_CFG->password = $3; }
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| bgp_proto SETKEY bool ';' { BGP_CFG->setkey = $3; }
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| bgp_proto PASSIVE bool ';' { BGP_CFG->passive = $3; }
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| bgp_proto INTERPRET COMMUNITIES bool ';' { BGP_CFG->interpret_communities = $4; }
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| bgp_proto ALLOW LOCAL AS ';' { BGP_CFG->allow_local_as = -1; }
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| bgp_proto ALLOW LOCAL AS expr ';' { BGP_CFG->allow_local_as = $5; }
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| bgp_proto ALLOW BGP_LOCAL_PREF bool ';' { BGP_CFG->allow_local_pref = $4; }
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| bgp_proto GRACEFUL RESTART bool ';' { BGP_CFG->gr_mode = $4; }
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| bgp_proto GRACEFUL RESTART AWARE ';' { BGP_CFG->gr_mode = BGP_GR_AWARE; }
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| bgp_proto GRACEFUL RESTART TIME expr ';' { BGP_CFG->gr_time = $5; }
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| bgp_proto LONG LIVED GRACEFUL RESTART bool ';' { BGP_CFG->llgr_mode = $6; }
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| bgp_proto LONG LIVED GRACEFUL RESTART AWARE ';' { BGP_CFG->llgr_mode = BGP_LLGR_AWARE; }
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| bgp_proto LONG LIVED STALE TIME expr ';' { BGP_CFG->llgr_time = $6; }
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| bgp_proto TTL SECURITY bool ';' { BGP_CFG->ttl_security = $4; }
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| bgp_proto CHECK LINK bool ';' { BGP_CFG->check_link = $4; }
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| bgp_proto BFD bool ';' { BGP_CFG->bfd = $3; cf_check_bfd($3); }
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| bgp_proto BFD GRACEFUL ';' { BGP_CFG->bfd = BGP_BFD_GRACEFUL; cf_check_bfd(1); }
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;
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bgp_afi:
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IPV4 { $$ = BGP_AF_IPV4; }
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| IPV6 { $$ = BGP_AF_IPV6; }
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| IPV4 MULTICAST { $$ = BGP_AF_IPV4_MC; }
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| IPV6 MULTICAST { $$ = BGP_AF_IPV6_MC; }
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| IPV4 MPLS { $$ = BGP_AF_IPV4_MPLS; }
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| IPV6 MPLS { $$ = BGP_AF_IPV6_MPLS; }
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| VPN4 MPLS { $$ = BGP_AF_VPN4_MPLS; }
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| VPN6 MPLS { $$ = BGP_AF_VPN6_MPLS; }
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| VPN4 MULTICAST { $$ = BGP_AF_VPN4_MC; }
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| VPN6 MULTICAST { $$ = BGP_AF_VPN6_MC; }
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| FLOW4 { $$ = BGP_AF_FLOW4; }
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| FLOW6 { $$ = BGP_AF_FLOW6; }
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;
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bgp_channel_start: bgp_afi
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{
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const struct bgp_af_desc *desc = bgp_get_af_desc($1);
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if (!desc)
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cf_error("Unknown AFI/SAFI");
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this_channel = channel_config_get(&channel_bgp, desc->name, desc->net, this_proto);
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/* New channel */
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if (!BGP_CC->desc)
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{
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BGP_CC->c.in_filter = FILTER_UNDEF;
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BGP_CC->c.out_filter = FILTER_UNDEF;
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BGP_CC->c.ra_mode = RA_UNDEF;
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BGP_CC->afi = $1;
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BGP_CC->desc = desc;
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BGP_CC->gr_able = 0xff; /* undefined */
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BGP_CC->llgr_able = 0xff; /* undefined */
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BGP_CC->llgr_time = ~0U; /* undefined */
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}
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};
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bgp_channel_item:
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channel_item
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| NEXT HOP ADDRESS ipa { BGP_CC->next_hop_addr = $4; }
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| NEXT HOP SELF { BGP_CC->next_hop_self = 1; BGP_CC->next_hop_keep = 0; }
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| NEXT HOP KEEP { BGP_CC->next_hop_keep = 1; BGP_CC->next_hop_self = 0; }
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| MISSING LLADDR SELF { BGP_CC->missing_lladdr = MLL_SELF; }
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| MISSING LLADDR DROP { BGP_CC->missing_lladdr = MLL_DROP; }
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| MISSING LLADDR IGNORE { BGP_CC->missing_lladdr = MLL_IGNORE; }
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| GATEWAY DIRECT { BGP_CC->gw_mode = GW_DIRECT; }
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| GATEWAY RECURSIVE { BGP_CC->gw_mode = GW_RECURSIVE; }
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| SECONDARY bool { BGP_CC->secondary = $2; }
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| GRACEFUL RESTART bool { BGP_CC->gr_able = $3; }
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| LONG LIVED GRACEFUL RESTART bool { BGP_CC->llgr_able = $5; }
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| LONG LIVED STALE TIME expr { BGP_CC->llgr_time = $5; }
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| EXTENDED NEXT HOP bool { BGP_CC->ext_next_hop = $4; }
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| ADD PATHS RX { BGP_CC->add_path = BGP_ADD_PATH_RX; }
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| ADD PATHS TX { BGP_CC->add_path = BGP_ADD_PATH_TX; }
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| ADD PATHS bool { BGP_CC->add_path = $3 ? BGP_ADD_PATH_FULL : 0; }
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| IGP TABLE rtable {
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if (BGP_CC->desc->no_igp)
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cf_error("IGP table not allowed here");
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if ($3->addr_type == NET_IP4)
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BGP_CC->igp_table_ip4 = $3;
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else if ($3->addr_type == NET_IP6)
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BGP_CC->igp_table_ip6 = $3;
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else
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cf_error("Mismatched IGP table type");
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}
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;
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bgp_channel_opts:
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/* empty */
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| bgp_channel_opts bgp_channel_item ';'
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;
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bgp_channel_opt_list:
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/* empty */
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| '{' bgp_channel_opts '}'
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;
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bgp_channel_end:
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{
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if (!this_channel->table)
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cf_error("Routing table not specified");
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this_channel = NULL;
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};
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bgp_proto_channel: bgp_channel_start bgp_channel_opt_list bgp_channel_end;
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dynamic_attr: BGP_ORIGIN
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{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_ENUM_BGP_ORIGIN, EA_CODE(PROTOCOL_BGP, BA_ORIGIN)); } ;
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dynamic_attr: BGP_PATH
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{ $$ = f_new_dynamic_attr(EAF_TYPE_AS_PATH, T_PATH, EA_CODE(PROTOCOL_BGP, BA_AS_PATH)); } ;
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dynamic_attr: BGP_NEXT_HOP
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{ $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, T_IP, EA_CODE(PROTOCOL_BGP, BA_NEXT_HOP)); } ;
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dynamic_attr: BGP_MED
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{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_MULTI_EXIT_DISC)); } ;
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dynamic_attr: BGP_LOCAL_PREF
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{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_LOCAL_PREF)); } ;
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dynamic_attr: BGP_ATOMIC_AGGR
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{ $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_ATOMIC_AGGR)); } ;
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dynamic_attr: BGP_AGGREGATOR
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{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_AGGREGATOR)); } ;
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dynamic_attr: BGP_COMMUNITY
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{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY)); } ;
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dynamic_attr: BGP_ORIGINATOR_ID
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{ $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID, T_QUAD, EA_CODE(PROTOCOL_BGP, BA_ORIGINATOR_ID)); } ;
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dynamic_attr: BGP_CLUSTER_LIST
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{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_CLUSTER_LIST)); } ;
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dynamic_attr: BGP_EXT_COMMUNITY
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{ $$ = f_new_dynamic_attr(EAF_TYPE_EC_SET, T_ECLIST, EA_CODE(PROTOCOL_BGP, BA_EXT_COMMUNITY)); } ;
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dynamic_attr: BGP_LARGE_COMMUNITY
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{ $$ = f_new_dynamic_attr(EAF_TYPE_LC_SET, T_LCLIST, EA_CODE(PROTOCOL_BGP, BA_LARGE_COMMUNITY)); } ;
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CF_ENUM(T_ENUM_BGP_ORIGIN, ORIGIN_, IGP, EGP, INCOMPLETE)
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CF_CODE
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CF_END
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