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bird/proto/bgp/config.Y
Ondrej Zajicek (work) 9d3fc3062b BFD: Allow per-request session options 
BFD session options are configured per interface in BFD protocol. This
patch allows to specify them also per-request in protocols requesting
sessions (currently limited to BGP).
2020-11-08 15:33:22 +01:00

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/*
* BIRD -- Border Gateway Protocol Configuration
*
* (c) 2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "proto/bgp/bgp.h"
CF_DEFINES
#define BGP_CFG ((struct bgp_config *) this_proto)
#define BGP_CC ((struct bgp_channel_config *) this_channel)
CF_DECLS
CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE,
MULTIHOP, STARTUP, VIA, NEXT, HOP, SELF, DEFAULT, PATH, METRIC, ERROR,
START, DELAY, FORGET, WAIT, ENABLE, DISABLE, AFTER, BGP_PATH,
BGP_LOCAL_PREF, BGP_MED, BGP_ORIGIN, BGP_NEXT_HOP, BGP_ATOMIC_AGGR,
BGP_AGGREGATOR, BGP_COMMUNITY, BGP_EXT_COMMUNITY, BGP_LARGE_COMMUNITY,
SOURCE, ADDRESS, PASSWORD, RR, RS, CLIENT, CLUSTER, ID, AS4, ADVERTISE,
IPV4, CAPABILITIES, LIMIT, PASSIVE, PREFER, OLDER, MISSING, LLADDR,
DROP, IGNORE, ROUTE, REFRESH, INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID,
BGP_CLUSTER_LIST, IGP, TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL,
SECURITY, DETERMINISTIC, SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX,
GRACEFUL, RESTART, AWARE, CHECK, LINK, PORT, EXTENDED, MESSAGES, SETKEY,
STRICT, BIND, CONFEDERATION, MEMBER, MULTICAST, FLOW4, FLOW6, LONG,
LIVED, STALE, IMPORT, IBGP, EBGP, MANDATORY, INTERNAL, EXTERNAL, SETS,
DYNAMIC, RANGE, NAME, DIGITS, BGP_AIGP, AIGP, ORIGINATE, COST, ENFORCE,
FIRST)
%type <i> bgp_nh
%type <i32> bgp_afi
CF_KEYWORDS(CEASE, PREFIX, LIMIT, HIT, ADMINISTRATIVE, SHUTDOWN, RESET, PEER,
CONFIGURATION, CHANGE, DECONFIGURED, CONNECTION, REJECTED, COLLISION,
OUT, OF, RESOURCES)
%type<i> bgp_cease_mask bgp_cease_list bgp_cease_flag
CF_GRAMMAR
proto: bgp_proto '}' ;
bgp_proto_start: proto_start BGP {
this_proto = proto_config_new(&proto_bgp, $1);
BGP_CFG->local_port = BGP_PORT;
BGP_CFG->remote_port = BGP_PORT;
BGP_CFG->multihop = -1; /* undefined */
BGP_CFG->hold_time = 240;
BGP_CFG->initial_hold_time = 240;
BGP_CFG->compare_path_lengths = 1;
BGP_CFG->igp_metric = 1;
BGP_CFG->connect_delay_time = 5;
BGP_CFG->connect_retry_time = 120;
BGP_CFG->error_amnesia_time = 300;
BGP_CFG->error_delay_time_min = 60;
BGP_CFG->error_delay_time_max = 300;
BGP_CFG->enable_refresh = 1;
BGP_CFG->enable_as4 = 1;
BGP_CFG->capabilities = 2;
BGP_CFG->interpret_communities = 1;
BGP_CFG->allow_as_sets = 1;
BGP_CFG->default_local_pref = 100;
BGP_CFG->gr_mode = BGP_GR_AWARE;
BGP_CFG->gr_time = 120;
BGP_CFG->llgr_mode = -1;
BGP_CFG->llgr_time = 3600;
BGP_CFG->setkey = 1;
BGP_CFG->dynamic_name = "dynbgp";
BGP_CFG->check_link = -1;
}
;
bgp_loc_opts:
/* empty */
| bgp_loc_opts PORT expr { BGP_CFG->local_port = $3; if (($3<1) || ($3>65535)) cf_error("Invalid port number"); }
| bgp_loc_opts AS expr { BGP_CFG->local_as = $3; }
;
bgp_nbr_opts:
/* empty */
| bgp_nbr_opts PORT expr { BGP_CFG->remote_port = $3; if (($3<1) || ($3>65535)) cf_error("Invalid port number"); }
| bgp_nbr_opts AS expr { BGP_CFG->remote_as = $3; }
| bgp_nbr_opts INTERNAL { BGP_CFG->peer_type = BGP_PT_INTERNAL; }
| bgp_nbr_opts EXTERNAL { BGP_CFG->peer_type = BGP_PT_EXTERNAL; }
;
bgp_cease_mask:
/* true -> all except connection collision */
bool { $$ = $1 ? ~(1 << 7) : 0; }
| '{' bgp_cease_list '}' { $$ = $2; }
;
bgp_cease_list:
bgp_cease_flag
| bgp_cease_list ',' bgp_cease_flag { $$ = $1 | $3; }
;
bgp_cease_flag:
CEASE { $$ = 1 << 0; }
| PREFIX LIMIT HIT { $$ = 1 << 1; }
| ADMINISTRATIVE SHUTDOWN { $$ = 1 << 2; }
| PEER DECONFIGURED { $$ = 1 << 3; }
| ADMINISTRATIVE RESET { $$ = 1 << 4; }
| CONNECTION REJECTED { $$ = 1 << 5; }
| CONFIGURATION CHANGE { $$ = 1 << 6; }
| CONNECTION COLLISION { $$ = 1 << 7; }
| OUT OF RESOURCES { $$ = 1 << 8; }
;
bgp_proto:
bgp_proto_start proto_name '{'
| bgp_proto proto_item ';'
| bgp_proto bgp_proto_channel ';'
| bgp_proto LOCAL bgp_loc_opts ';'
| bgp_proto LOCAL ipa ipa_scope bgp_loc_opts ';' {
BGP_CFG->local_ip = $3;
if ($4) BGP_CFG->iface = $4;
}
| bgp_proto NEIGHBOR bgp_nbr_opts ';'
| bgp_proto NEIGHBOR ipa ipa_scope bgp_nbr_opts ';' {
if (ipa_nonzero(BGP_CFG->remote_ip) || BGP_CFG->remote_range)
cf_error("Only one neighbor per BGP instance is allowed");
BGP_CFG->remote_ip = $3;
if ($4) BGP_CFG->iface = $4;
}
| bgp_proto NEIGHBOR RANGE net_ip bgp_nbr_opts ';' {
if (ipa_nonzero(BGP_CFG->remote_ip) || BGP_CFG->remote_range)
cf_error("Only one neighbor per BGP instance is allowed");
net_addr *n = cfg_alloc($4.length);
net_copy(n, &($4));
BGP_CFG->remote_range = n;
}
| bgp_proto INTERFACE TEXT ';' { BGP_CFG->iface = if_get_by_name($3); }
| bgp_proto RR CLUSTER ID idval ';' { BGP_CFG->rr_cluster_id = $5; }
| bgp_proto RR CLIENT bool ';' { BGP_CFG->rr_client = $4; }
| bgp_proto RS CLIENT bool ';' { BGP_CFG->rs_client = $4; }
| bgp_proto CONFEDERATION expr ';' { BGP_CFG->confederation = $3; }
| bgp_proto CONFEDERATION MEMBER bool ';' { BGP_CFG->confederation_member = $4; }
| bgp_proto HOLD TIME expr ';' { BGP_CFG->hold_time = $4; }
| bgp_proto STARTUP HOLD TIME expr ';' { BGP_CFG->initial_hold_time = $5; }
| bgp_proto DIRECT ';' { BGP_CFG->multihop = 0; }
| bgp_proto MULTIHOP ';' { BGP_CFG->multihop = 64; }
| bgp_proto MULTIHOP expr ';' { BGP_CFG->multihop = $3; if (($3<1) || ($3>255)) cf_error("Multihop must be in range 1-255"); }
| bgp_proto DYNAMIC NAME text ';' {
if (strchr($4, '%')) cf_error("Forbidden character '%%' in dynamic name");
if (strlen($4) > (SYM_MAX_LEN - 16)) cf_error("Dynamic name too long");
BGP_CFG->dynamic_name = $4;
}
| bgp_proto DYNAMIC NAME DIGITS expr ';' { BGP_CFG->dynamic_name_digits = $5; if ($5>10) cf_error("Dynamic name digits must be at most 10"); }
| bgp_proto STRICT BIND bool ';' { BGP_CFG->strict_bind = $4; }
| bgp_proto PATH METRIC bool ';' { BGP_CFG->compare_path_lengths = $4; }
| bgp_proto MED METRIC bool ';' { BGP_CFG->med_metric = $4; }
| bgp_proto IGP METRIC bool ';' { BGP_CFG->igp_metric = $4; }
| bgp_proto PREFER OLDER bool ';' { BGP_CFG->prefer_older = $4; }
| bgp_proto DETERMINISTIC MED bool ';' { BGP_CFG->deterministic_med = $4; }
| bgp_proto DEFAULT BGP_MED expr ';' { BGP_CFG->default_med = $4; }
| bgp_proto DEFAULT BGP_LOCAL_PREF expr ';' { BGP_CFG->default_local_pref = $4; }
| bgp_proto SOURCE ADDRESS ipa ';' { BGP_CFG->local_ip = $4; }
| 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); }
| bgp_proto CONNECT DELAY TIME expr ';' { BGP_CFG->connect_delay_time = $5; }
| bgp_proto CONNECT RETRY TIME expr ';' { BGP_CFG->connect_retry_time = $5; }
| bgp_proto KEEPALIVE TIME expr ';' { BGP_CFG->keepalive_time = $4; }
| bgp_proto ERROR FORGET TIME expr ';' { BGP_CFG->error_amnesia_time = $5; }
| bgp_proto ERROR WAIT TIME expr ',' expr ';' { BGP_CFG->error_delay_time_min = $5; BGP_CFG->error_delay_time_max = $7; }
| bgp_proto DISABLE AFTER ERROR bool ';' { BGP_CFG->disable_after_error = $5; }
| bgp_proto DISABLE AFTER CEASE bgp_cease_mask ';' { BGP_CFG->disable_after_cease = $5; }
| bgp_proto ENABLE ROUTE REFRESH bool ';' { BGP_CFG->enable_refresh = $5; }
| bgp_proto ENABLE AS4 bool ';' { BGP_CFG->enable_as4 = $4; }
| bgp_proto ENABLE EXTENDED MESSAGES bool ';' { BGP_CFG->enable_extended_messages = $5; }
| bgp_proto CAPABILITIES bool ';' { BGP_CFG->capabilities = $3; }
| bgp_proto PASSWORD text ';' { BGP_CFG->password = $3; }
| bgp_proto SETKEY bool ';' { BGP_CFG->setkey = $3; }
| bgp_proto PASSIVE bool ';' { BGP_CFG->passive = $3; }
| bgp_proto INTERPRET COMMUNITIES bool ';' { BGP_CFG->interpret_communities = $4; }
| bgp_proto ALLOW LOCAL AS ';' { BGP_CFG->allow_local_as = -1; }
| bgp_proto ALLOW LOCAL AS expr ';' { BGP_CFG->allow_local_as = $5; }
| bgp_proto ALLOW BGP_LOCAL_PREF bool ';' { BGP_CFG->allow_local_pref = $4; }
| bgp_proto ALLOW AS SETS bool ';' { BGP_CFG->allow_as_sets = $5; }
| bgp_proto GRACEFUL RESTART bool ';' { BGP_CFG->gr_mode = $4; }
| bgp_proto GRACEFUL RESTART AWARE ';' { BGP_CFG->gr_mode = BGP_GR_AWARE; }
| bgp_proto GRACEFUL RESTART TIME expr ';' { BGP_CFG->gr_time = $5; }
| bgp_proto LONG LIVED GRACEFUL RESTART bool ';' { BGP_CFG->llgr_mode = $6; }
| bgp_proto LONG LIVED GRACEFUL RESTART AWARE ';' { BGP_CFG->llgr_mode = BGP_LLGR_AWARE; }
| bgp_proto LONG LIVED STALE TIME expr ';' { BGP_CFG->llgr_time = $6; }
| bgp_proto TTL SECURITY bool ';' { BGP_CFG->ttl_security = $4; }
| bgp_proto CHECK LINK bool ';' { BGP_CFG->check_link = $4; }
| bgp_proto BFD bool ';' { cf_check_bfd($3); BGP_CFG->bfd = $3 ? bfd_new_options() : NULL; }
| bgp_proto BFD GRACEFUL ';' { cf_check_bfd(1); struct bfd_options *opts = bfd_new_options(); opts->mode = BGP_BFD_GRACEFUL; BGP_CFG->bfd = opts; }
| bgp_proto BFD bfd_opts ';' { BGP_CFG->bfd = $3; cf_check_bfd(1); }
| bgp_proto ENFORCE FIRST AS bool ';' { BGP_CFG->enforce_first_as = $5; }
;
bgp_afi:
IPV4 { $$ = BGP_AF_IPV4; }
| IPV6 { $$ = BGP_AF_IPV6; }
| IPV4 MULTICAST { $$ = BGP_AF_IPV4_MC; }
| IPV6 MULTICAST { $$ = BGP_AF_IPV6_MC; }
| IPV4 MPLS { $$ = BGP_AF_IPV4_MPLS; }
| IPV6 MPLS { $$ = BGP_AF_IPV6_MPLS; }
| VPN4 MPLS { $$ = BGP_AF_VPN4_MPLS; }
| VPN6 MPLS { $$ = BGP_AF_VPN6_MPLS; }
| VPN4 MULTICAST { $$ = BGP_AF_VPN4_MC; }
| VPN6 MULTICAST { $$ = BGP_AF_VPN6_MC; }
| FLOW4 { $$ = BGP_AF_FLOW4; }
| FLOW6 { $$ = BGP_AF_FLOW6; }
;
bgp_channel_start: bgp_afi
{
const struct bgp_af_desc *desc = bgp_get_af_desc($1);
if (!desc)
cf_error("Unknown AFI/SAFI");
this_channel = channel_config_get(&channel_bgp, desc->name, desc->net, this_proto);
/* New channel */
if (!BGP_CC->desc)
{
BGP_CC->c.in_filter = FILTER_UNDEF;
BGP_CC->c.out_filter = FILTER_UNDEF;
BGP_CC->c.ra_mode = RA_UNDEF;
BGP_CC->afi = $1;
BGP_CC->desc = desc;
BGP_CC->next_hop_keep = 0xff; /* undefined */
BGP_CC->gr_able = 0xff; /* undefined */
BGP_CC->llgr_able = 0xff; /* undefined */
BGP_CC->llgr_time = ~0U; /* undefined */
BGP_CC->aigp = 0xff; /* undefined */
}
};
bgp_nh:
bool { $$ = $1; }
| IBGP { $$ = NH_IBGP; }
| EBGP { $$ = NH_EBGP; }
bgp_channel_item:
channel_item
| NEXT HOP ADDRESS ipa { BGP_CC->next_hop_addr = $4; }
| NEXT HOP SELF bgp_nh { BGP_CC->next_hop_self = $4; }
| NEXT HOP KEEP bgp_nh { BGP_CC->next_hop_keep = $4; }
| MANDATORY bool { BGP_CC->mandatory = $2; }
| MISSING LLADDR SELF { BGP_CC->missing_lladdr = MLL_SELF; }
| MISSING LLADDR DROP { BGP_CC->missing_lladdr = MLL_DROP; }
| MISSING LLADDR IGNORE { BGP_CC->missing_lladdr = MLL_IGNORE; }
| GATEWAY DIRECT { BGP_CC->gw_mode = GW_DIRECT; }
| GATEWAY RECURSIVE { BGP_CC->gw_mode = GW_RECURSIVE; }
| SECONDARY bool { BGP_CC->secondary = $2; }
| GRACEFUL RESTART bool { BGP_CC->gr_able = $3; }
| LONG LIVED GRACEFUL RESTART bool { BGP_CC->llgr_able = $5; }
| LONG LIVED STALE TIME expr { BGP_CC->llgr_time = $5; }
| EXTENDED NEXT HOP bool { BGP_CC->ext_next_hop = $4; }
| ADD PATHS RX { BGP_CC->add_path = BGP_ADD_PATH_RX; }
| ADD PATHS TX { BGP_CC->add_path = BGP_ADD_PATH_TX; }
| ADD PATHS bool { BGP_CC->add_path = $3 ? BGP_ADD_PATH_FULL : 0; }
| IMPORT TABLE bool { BGP_CC->import_table = $3; }
| EXPORT TABLE bool { BGP_CC->export_table = $3; }
| AIGP bool { BGP_CC->aigp = $2; BGP_CC->aigp_originate = 0; }
| AIGP ORIGINATE { BGP_CC->aigp = 1; BGP_CC->aigp_originate = 1; }
| COST expr { BGP_CC->cost = $2; if ($2 < 1) cf_error("Cost must be positive"); }
| IGP TABLE rtable {
if (BGP_CC->desc->no_igp)
cf_error("IGP table not allowed here");
if ($3->addr_type == NET_IP4)
BGP_CC->igp_table_ip4 = $3;
else if ($3->addr_type == NET_IP6)
BGP_CC->igp_table_ip6 = $3;
else
cf_error("Mismatched IGP table type");
}
;
bgp_channel_opts:
/* empty */
| bgp_channel_opts bgp_channel_item ';'
;
bgp_channel_opt_list:
/* empty */
| '{' bgp_channel_opts '}'
;
bgp_channel_end:
{
if (!this_channel->table)
cf_error("Routing table not specified");
this_channel = NULL;
};
bgp_proto_channel: bgp_channel_start bgp_channel_opt_list bgp_channel_end;
dynamic_attr: BGP_ORIGIN
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_ENUM_BGP_ORIGIN, EA_CODE(PROTOCOL_BGP, BA_ORIGIN)); } ;
dynamic_attr: BGP_PATH
{ $$ = f_new_dynamic_attr(EAF_TYPE_AS_PATH, T_PATH, EA_CODE(PROTOCOL_BGP, BA_AS_PATH)); } ;
dynamic_attr: BGP_NEXT_HOP
{ $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, T_IP, EA_CODE(PROTOCOL_BGP, BA_NEXT_HOP)); } ;
dynamic_attr: BGP_MED
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_MULTI_EXIT_DISC)); } ;
dynamic_attr: BGP_LOCAL_PREF
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_LOCAL_PREF)); } ;
dynamic_attr: BGP_ATOMIC_AGGR
{ $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_ATOMIC_AGGR)); } ;
dynamic_attr: BGP_AGGREGATOR
{ $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_AGGREGATOR)); } ;
dynamic_attr: BGP_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY)); } ;
dynamic_attr: BGP_ORIGINATOR_ID
{ $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID, T_QUAD, EA_CODE(PROTOCOL_BGP, BA_ORIGINATOR_ID)); } ;
dynamic_attr: BGP_CLUSTER_LIST
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_CLUSTER_LIST)); } ;
dynamic_attr: BGP_EXT_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_EC_SET, T_ECLIST, EA_CODE(PROTOCOL_BGP, BA_EXT_COMMUNITY)); } ;
dynamic_attr: BGP_AIGP
{ $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_AIGP)); } ;
dynamic_attr: BGP_LARGE_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_LC_SET, T_LCLIST, EA_CODE(PROTOCOL_BGP, BA_LARGE_COMMUNITY)); } ;
CF_ENUM(T_ENUM_BGP_ORIGIN, ORIGIN_, IGP, EGP, INCOMPLETE)
CF_CODE
CF_END
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