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bird/proto/bgp/config.Y
Maria Matejka 4c553c5a5b Filter refactoring: dropped the recursion from the interpreter 
This is a major change of how the filters are interpreted. If everything
works how it should, it should not affect you unless you are hacking the
filters themselves.

Anyway, this change should make a huge improvement in the filter performance
as previous benchmarks showed that our major problem lies in the
recursion itself.

There are also some changes in nest and protocols, related mostly to
spreading const declarations throughout the whole BIRD and also to
refactored dynamic attribute definitions. The need of these came up
during the whole work and it is too difficult to split out these
not-so-related changes.
2019-02-20 22:30:54 +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)
%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->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->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_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))
cf_error("Only one neighbor per BGP instance is allowed");
BGP_CFG->remote_ip = $3;
if ($4) BGP_CFG->iface = $4;
}
| 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 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 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 ';' { BGP_CFG->bfd = $3; cf_check_bfd($3); }
| bgp_proto BFD GRACEFUL ';' { BGP_CFG->bfd = BGP_BFD_GRACEFUL; cf_check_bfd(1); }
;
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_nh:
bool { $$ = $1; }
| IBGP { $$ = NH_IBGP; }
| EBGP { $$ = NH_EBGP; }
bgp_channel_item:
channel_item
| NEXT HOP ADDRESS ipa { BGP_CC->next_hop_addr = $4; }
| NEXT HOP SELF bgp_nh { BGP_CC->next_hop_self = $4; }
| NEXT HOP KEEP bgp_nh { BGP_CC->next_hop_keep = $4; }
| MISSING LLADDR SELF { BGP_CC->missing_lladdr = MLL_SELF; }
| MISSING LLADDR DROP { BGP_CC->missing_lladdr = MLL_DROP; }
| MISSING LLADDR IGNORE { BGP_CC->missing_lladdr = MLL_IGNORE; }
| GATEWAY DIRECT { BGP_CC->gw_mode = GW_DIRECT; }
| GATEWAY RECURSIVE { BGP_CC->gw_mode = GW_RECURSIVE; }
| SECONDARY bool { BGP_CC->secondary = $2; }
| GRACEFUL RESTART bool { BGP_CC->gr_able = $3; }
| LONG LIVED GRACEFUL RESTART bool { BGP_CC->llgr_able = $5; }
| LONG LIVED STALE TIME expr { BGP_CC->llgr_time = $5; }
| EXTENDED NEXT HOP bool { BGP_CC->ext_next_hop = $4; }
| ADD PATHS RX { BGP_CC->add_path = BGP_ADD_PATH_RX; }
| ADD PATHS TX { BGP_CC->add_path = BGP_ADD_PATH_TX; }
| ADD PATHS bool { BGP_CC->add_path = $3 ? BGP_ADD_PATH_FULL : 0; }
| IMPORT TABLE bool { BGP_CC->import_table = $3; }
| IGP TABLE rtable {
if (BGP_CC->desc->no_igp)
cf_error("IGP table not allowed here");
if ($3->addr_type == NET_IP4)
BGP_CC->igp_table_ip4 = $3;
else if ($3->addr_type == NET_IP6)
BGP_CC->igp_table_ip6 = $3;
else
cf_error("Mismatched IGP table type");
}
;
bgp_channel_opts:
/* empty */
| bgp_channel_opts bgp_channel_item ';'
;
bgp_channel_opt_list:
/* empty */
| '{' bgp_channel_opts '}'
;
bgp_channel_end:
{
if (!this_channel->table)
cf_error("Routing table not specified");
this_channel = NULL;
};
bgp_proto_channel: bgp_channel_start bgp_channel_opt_list bgp_channel_end;
dynamic_attr: BGP_ORIGIN
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_ENUM_BGP_ORIGIN, EA_CODE(PROTOCOL_BGP, BA_ORIGIN)); } ;
dynamic_attr: BGP_PATH
{ $$ = f_new_dynamic_attr(EAF_TYPE_AS_PATH, 0, T_PATH, EA_CODE(PROTOCOL_BGP, BA_AS_PATH)); } ;
dynamic_attr: BGP_NEXT_HOP
{ $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, 0, T_IP, EA_CODE(PROTOCOL_BGP, BA_NEXT_HOP)); } ;
dynamic_attr: BGP_MED
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_CODE(PROTOCOL_BGP, BA_MULTI_EXIT_DISC)); } ;
dynamic_attr: BGP_LOCAL_PREF
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_CODE(PROTOCOL_BGP, BA_LOCAL_PREF)); } ;
dynamic_attr: BGP_ATOMIC_AGGR
{ $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, 0, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_ATOMIC_AGGR)); } ;
dynamic_attr: BGP_AGGREGATOR
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_CODE(PROTOCOL_BGP, BA_AGGREGATOR)); } ;
dynamic_attr: BGP_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, 0, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY)); } ;
dynamic_attr: BGP_ORIGINATOR_ID
{ $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID, 0, T_QUAD, EA_CODE(PROTOCOL_BGP, BA_ORIGINATOR_ID)); } ;
dynamic_attr: BGP_CLUSTER_LIST
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, 0, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_CLUSTER_LIST)); } ;
dynamic_attr: BGP_EXT_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_EC_SET, 0, T_ECLIST, EA_CODE(PROTOCOL_BGP, BA_EXT_COMMUNITY)); } ;
dynamic_attr: BGP_LARGE_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_LC_SET, 0, 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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