1: /*
2: * BIRD -- Border Gateway Protocol Configuration
3: *
4: * (c) 2000 Martin Mares <mj@ucw.cz>
5: *
6: * Can be freely distributed and used under the terms of the GNU GPL.
7: */
8:
9: CF_HDR
10:
11: #include "proto/bgp/bgp.h"
12:
13: CF_DEFINES
14:
15: #define BGP_CFG ((struct bgp_config *) this_proto)
16: #define BGP_CC ((struct bgp_channel_config *) this_channel)
17:
18: CF_DECLS
19:
20: CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE,
21: MULTIHOP, STARTUP, VIA, NEXT, HOP, SELF, DEFAULT, PATH, METRIC, ERROR,
22: START, DELAY, FORGET, WAIT, ENABLE, DISABLE, AFTER, BGP_PATH,
23: BGP_LOCAL_PREF, BGP_MED, BGP_ORIGIN, BGP_NEXT_HOP, BGP_ATOMIC_AGGR,
24: BGP_AGGREGATOR, BGP_COMMUNITY, BGP_EXT_COMMUNITY, BGP_LARGE_COMMUNITY,
25: SOURCE, ADDRESS, PASSWORD, RR, RS, CLIENT, CLUSTER, ID, AS4, ADVERTISE,
26: IPV4, CAPABILITIES, LIMIT, PASSIVE, PREFER, OLDER, MISSING, LLADDR,
27: DROP, IGNORE, ROUTE, REFRESH, INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID,
28: BGP_CLUSTER_LIST, IGP, TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL,
29: SECURITY, DETERMINISTIC, SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX,
30: GRACEFUL, RESTART, AWARE, CHECK, LINK, PORT, EXTENDED, MESSAGES, SETKEY,
31: STRICT, BIND, CONFEDERATION, MEMBER, MULTICAST, FLOW4, FLOW6, LONG,
32: LIVED, STALE, IMPORT, IBGP, EBGP, MANDATORY, INTERNAL, EXTERNAL,
33: DYNAMIC, RANGE, NAME, DIGITS, BGP_AIGP, AIGP, ORIGINATE, COST)
34:
35: %type <i> bgp_nh
36: %type <i32> bgp_afi
37:
38: CF_KEYWORDS(CEASE, PREFIX, LIMIT, HIT, ADMINISTRATIVE, SHUTDOWN, RESET, PEER,
39: CONFIGURATION, CHANGE, DECONFIGURED, CONNECTION, REJECTED, COLLISION,
40: OUT, OF, RESOURCES)
41:
42: %type<i> bgp_cease_mask bgp_cease_list bgp_cease_flag
43:
44: CF_GRAMMAR
45:
46: proto: bgp_proto '}' ;
47:
48: bgp_proto_start: proto_start BGP {
49: this_proto = proto_config_new(&proto_bgp, $1);
50: BGP_CFG->local_port = BGP_PORT;
51: BGP_CFG->remote_port = BGP_PORT;
52: BGP_CFG->multihop = -1; /* undefined */
53: BGP_CFG->hold_time = 240;
54: BGP_CFG->initial_hold_time = 240;
55: BGP_CFG->compare_path_lengths = 1;
56: BGP_CFG->igp_metric = 1;
57: BGP_CFG->connect_delay_time = 5;
58: BGP_CFG->connect_retry_time = 120;
59: BGP_CFG->error_amnesia_time = 300;
60: BGP_CFG->error_delay_time_min = 60;
61: BGP_CFG->error_delay_time_max = 300;
62: BGP_CFG->enable_refresh = 1;
63: BGP_CFG->enable_as4 = 1;
64: BGP_CFG->capabilities = 2;
65: BGP_CFG->interpret_communities = 1;
66: BGP_CFG->default_local_pref = 100;
67: BGP_CFG->gr_mode = BGP_GR_AWARE;
68: BGP_CFG->gr_time = 120;
69: BGP_CFG->llgr_mode = -1;
70: BGP_CFG->llgr_time = 3600;
71: BGP_CFG->setkey = 1;
72: BGP_CFG->dynamic_name = "dynbgp";
73: BGP_CFG->check_link = -1;
74: }
75: ;
76:
77: bgp_loc_opts:
78: /* empty */
79: | bgp_loc_opts PORT expr { BGP_CFG->local_port = $3; if (($3<1) || ($3>65535)) cf_error("Invalid port number"); }
80: | bgp_loc_opts AS expr { BGP_CFG->local_as = $3; }
81: ;
82:
83: bgp_nbr_opts:
84: /* empty */
85: | bgp_nbr_opts PORT expr { BGP_CFG->remote_port = $3; if (($3<1) || ($3>65535)) cf_error("Invalid port number"); }
86: | bgp_nbr_opts AS expr { BGP_CFG->remote_as = $3; }
87: | bgp_nbr_opts INTERNAL { BGP_CFG->peer_type = BGP_PT_INTERNAL; }
88: | bgp_nbr_opts EXTERNAL { BGP_CFG->peer_type = BGP_PT_EXTERNAL; }
89: ;
90:
91: bgp_cease_mask:
92: /* true -> all except connection collision */
93: bool { $$ = $1 ? ~(1 << 7) : 0; }
94: | '{' bgp_cease_list '}' { $$ = $2; }
95: ;
96:
97: bgp_cease_list:
98: bgp_cease_flag
99: | bgp_cease_list ',' bgp_cease_flag { $$ = $1 | $3; }
100: ;
101:
102: bgp_cease_flag:
103: CEASE { $$ = 1 << 0; }
104: | PREFIX LIMIT HIT { $$ = 1 << 1; }
105: | ADMINISTRATIVE SHUTDOWN { $$ = 1 << 2; }
106: | PEER DECONFIGURED { $$ = 1 << 3; }
107: | ADMINISTRATIVE RESET { $$ = 1 << 4; }
108: | CONNECTION REJECTED { $$ = 1 << 5; }
109: | CONFIGURATION CHANGE { $$ = 1 << 6; }
110: | CONNECTION COLLISION { $$ = 1 << 7; }
111: | OUT OF RESOURCES { $$ = 1 << 8; }
112: ;
113:
114: bgp_proto:
115: bgp_proto_start proto_name '{'
116: | bgp_proto proto_item ';'
117: | bgp_proto bgp_proto_channel ';'
118: | bgp_proto LOCAL bgp_loc_opts ';'
119: | bgp_proto LOCAL ipa ipa_scope bgp_loc_opts ';' {
120: BGP_CFG->local_ip = $3;
121: if ($4) BGP_CFG->iface = $4;
122: }
123: | bgp_proto NEIGHBOR bgp_nbr_opts ';'
124: | bgp_proto NEIGHBOR ipa ipa_scope bgp_nbr_opts ';' {
125: if (ipa_nonzero(BGP_CFG->remote_ip) || BGP_CFG->remote_range)
126: cf_error("Only one neighbor per BGP instance is allowed");
127: BGP_CFG->remote_ip = $3;
128: if ($4) BGP_CFG->iface = $4;
129: }
130: | bgp_proto NEIGHBOR RANGE net_ip bgp_nbr_opts ';' {
131: if (ipa_nonzero(BGP_CFG->remote_ip) || BGP_CFG->remote_range)
132: cf_error("Only one neighbor per BGP instance is allowed");
133: net_addr *n = cfg_alloc($4.length);
134: net_copy(n, &($4));
135: BGP_CFG->remote_range = n;
136: }
137: | bgp_proto INTERFACE TEXT ';' { BGP_CFG->iface = if_get_by_name($3); }
138: | bgp_proto RR CLUSTER ID idval ';' { BGP_CFG->rr_cluster_id = $5; }
139: | bgp_proto RR CLIENT bool ';' { BGP_CFG->rr_client = $4; }
140: | bgp_proto RS CLIENT bool ';' { BGP_CFG->rs_client = $4; }
141: | bgp_proto CONFEDERATION expr ';' { BGP_CFG->confederation = $3; }
142: | bgp_proto CONFEDERATION MEMBER bool ';' { BGP_CFG->confederation_member = $4; }
143: | bgp_proto HOLD TIME expr ';' { BGP_CFG->hold_time = $4; }
144: | bgp_proto STARTUP HOLD TIME expr ';' { BGP_CFG->initial_hold_time = $5; }
145: | bgp_proto DIRECT ';' { BGP_CFG->multihop = 0; }
146: | bgp_proto MULTIHOP ';' { BGP_CFG->multihop = 64; }
147: | bgp_proto MULTIHOP expr ';' { BGP_CFG->multihop = $3; if (($3<1) || ($3>255)) cf_error("Multihop must be in range 1-255"); }
148: | bgp_proto DYNAMIC NAME text ';' {
149: if (strchr($4, '%')) cf_error("Forbidden character '%%' in dynamic name");
150: if (strlen($4) > (SYM_MAX_LEN - 16)) cf_error("Dynamic name too long");
151: BGP_CFG->dynamic_name = $4;
152: }
153: | 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"); }
154: | bgp_proto STRICT BIND bool ';' { BGP_CFG->strict_bind = $4; }
155: | bgp_proto PATH METRIC bool ';' { BGP_CFG->compare_path_lengths = $4; }
156: | bgp_proto MED METRIC bool ';' { BGP_CFG->med_metric = $4; }
157: | bgp_proto IGP METRIC bool ';' { BGP_CFG->igp_metric = $4; }
158: | bgp_proto PREFER OLDER bool ';' { BGP_CFG->prefer_older = $4; }
159: | bgp_proto DETERMINISTIC MED bool ';' { BGP_CFG->deterministic_med = $4; }
160: | bgp_proto DEFAULT BGP_MED expr ';' { BGP_CFG->default_med = $4; }
161: | bgp_proto DEFAULT BGP_LOCAL_PREF expr ';' { BGP_CFG->default_local_pref = $4; }
162: | bgp_proto SOURCE ADDRESS ipa ';' { BGP_CFG->local_ip = $4; }
163: | 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); }
164: | bgp_proto CONNECT DELAY TIME expr ';' { BGP_CFG->connect_delay_time = $5; }
165: | bgp_proto CONNECT RETRY TIME expr ';' { BGP_CFG->connect_retry_time = $5; }
166: | bgp_proto KEEPALIVE TIME expr ';' { BGP_CFG->keepalive_time = $4; }
167: | bgp_proto ERROR FORGET TIME expr ';' { BGP_CFG->error_amnesia_time = $5; }
168: | bgp_proto ERROR WAIT TIME expr ',' expr ';' { BGP_CFG->error_delay_time_min = $5; BGP_CFG->error_delay_time_max = $7; }
169: | bgp_proto DISABLE AFTER ERROR bool ';' { BGP_CFG->disable_after_error = $5; }
170: | bgp_proto DISABLE AFTER CEASE bgp_cease_mask ';' { BGP_CFG->disable_after_cease = $5; }
171: | bgp_proto ENABLE ROUTE REFRESH bool ';' { BGP_CFG->enable_refresh = $5; }
172: | bgp_proto ENABLE AS4 bool ';' { BGP_CFG->enable_as4 = $4; }
173: | bgp_proto ENABLE EXTENDED MESSAGES bool ';' { BGP_CFG->enable_extended_messages = $5; }
174: | bgp_proto CAPABILITIES bool ';' { BGP_CFG->capabilities = $3; }
175: | bgp_proto PASSWORD text ';' { BGP_CFG->password = $3; }
176: | bgp_proto SETKEY bool ';' { BGP_CFG->setkey = $3; }
177: | bgp_proto PASSIVE bool ';' { BGP_CFG->passive = $3; }
178: | bgp_proto INTERPRET COMMUNITIES bool ';' { BGP_CFG->interpret_communities = $4; }
179: | bgp_proto ALLOW LOCAL AS ';' { BGP_CFG->allow_local_as = -1; }
180: | bgp_proto ALLOW LOCAL AS expr ';' { BGP_CFG->allow_local_as = $5; }
181: | bgp_proto ALLOW BGP_LOCAL_PREF bool ';' { BGP_CFG->allow_local_pref = $4; }
182: | bgp_proto GRACEFUL RESTART bool ';' { BGP_CFG->gr_mode = $4; }
183: | bgp_proto GRACEFUL RESTART AWARE ';' { BGP_CFG->gr_mode = BGP_GR_AWARE; }
184: | bgp_proto GRACEFUL RESTART TIME expr ';' { BGP_CFG->gr_time = $5; }
185: | bgp_proto LONG LIVED GRACEFUL RESTART bool ';' { BGP_CFG->llgr_mode = $6; }
186: | bgp_proto LONG LIVED GRACEFUL RESTART AWARE ';' { BGP_CFG->llgr_mode = BGP_LLGR_AWARE; }
187: | bgp_proto LONG LIVED STALE TIME expr ';' { BGP_CFG->llgr_time = $6; }
188: | bgp_proto TTL SECURITY bool ';' { BGP_CFG->ttl_security = $4; }
189: | bgp_proto CHECK LINK bool ';' { BGP_CFG->check_link = $4; }
190: | bgp_proto BFD bool ';' { BGP_CFG->bfd = $3; cf_check_bfd($3); }
191: | bgp_proto BFD GRACEFUL ';' { BGP_CFG->bfd = BGP_BFD_GRACEFUL; cf_check_bfd(1); }
192: ;
193:
194: bgp_afi:
195: IPV4 { $$ = BGP_AF_IPV4; }
196: | IPV6 { $$ = BGP_AF_IPV6; }
197: | IPV4 MULTICAST { $$ = BGP_AF_IPV4_MC; }
198: | IPV6 MULTICAST { $$ = BGP_AF_IPV6_MC; }
199: | IPV4 MPLS { $$ = BGP_AF_IPV4_MPLS; }
200: | IPV6 MPLS { $$ = BGP_AF_IPV6_MPLS; }
201: | VPN4 MPLS { $$ = BGP_AF_VPN4_MPLS; }
202: | VPN6 MPLS { $$ = BGP_AF_VPN6_MPLS; }
203: | VPN4 MULTICAST { $$ = BGP_AF_VPN4_MC; }
204: | VPN6 MULTICAST { $$ = BGP_AF_VPN6_MC; }
205: | FLOW4 { $$ = BGP_AF_FLOW4; }
206: | FLOW6 { $$ = BGP_AF_FLOW6; }
207: ;
208:
209: bgp_channel_start: bgp_afi
210: {
211: const struct bgp_af_desc *desc = bgp_get_af_desc($1);
212:
213: if (!desc)
214: cf_error("Unknown AFI/SAFI");
215:
216: this_channel = channel_config_get(&channel_bgp, desc->name, desc->net, this_proto);
217:
218: /* New channel */
219: if (!BGP_CC->desc)
220: {
221: BGP_CC->c.in_filter = FILTER_UNDEF;
222: BGP_CC->c.out_filter = FILTER_UNDEF;
223: BGP_CC->c.ra_mode = RA_UNDEF;
224: BGP_CC->afi = $1;
225: BGP_CC->desc = desc;
226: BGP_CC->next_hop_keep = 0xff; /* undefined */
227: BGP_CC->gr_able = 0xff; /* undefined */
228: BGP_CC->llgr_able = 0xff; /* undefined */
229: BGP_CC->llgr_time = ~0U; /* undefined */
230: BGP_CC->aigp = 0xff; /* undefined */
231: }
232: };
233:
234: bgp_nh:
235: bool { $$ = $1; }
236: | IBGP { $$ = NH_IBGP; }
237: | EBGP { $$ = NH_EBGP; }
238:
239: bgp_channel_item:
240: channel_item
241: | NEXT HOP ADDRESS ipa { BGP_CC->next_hop_addr = $4; }
242: | NEXT HOP SELF bgp_nh { BGP_CC->next_hop_self = $4; }
243: | NEXT HOP KEEP bgp_nh { BGP_CC->next_hop_keep = $4; }
244: | MANDATORY bool { BGP_CC->mandatory = $2; }
245: | MISSING LLADDR SELF { BGP_CC->missing_lladdr = MLL_SELF; }
246: | MISSING LLADDR DROP { BGP_CC->missing_lladdr = MLL_DROP; }
247: | MISSING LLADDR IGNORE { BGP_CC->missing_lladdr = MLL_IGNORE; }
248: | GATEWAY DIRECT { BGP_CC->gw_mode = GW_DIRECT; }
249: | GATEWAY RECURSIVE { BGP_CC->gw_mode = GW_RECURSIVE; }
250: | SECONDARY bool { BGP_CC->secondary = $2; }
251: | GRACEFUL RESTART bool { BGP_CC->gr_able = $3; }
252: | LONG LIVED GRACEFUL RESTART bool { BGP_CC->llgr_able = $5; }
253: | LONG LIVED STALE TIME expr { BGP_CC->llgr_time = $5; }
254: | EXTENDED NEXT HOP bool { BGP_CC->ext_next_hop = $4; }
255: | ADD PATHS RX { BGP_CC->add_path = BGP_ADD_PATH_RX; }
256: | ADD PATHS TX { BGP_CC->add_path = BGP_ADD_PATH_TX; }
257: | ADD PATHS bool { BGP_CC->add_path = $3 ? BGP_ADD_PATH_FULL : 0; }
258: | IMPORT TABLE bool { BGP_CC->import_table = $3; }
259: | EXPORT TABLE bool { BGP_CC->export_table = $3; }
260: | AIGP bool { BGP_CC->aigp = $2; BGP_CC->aigp_originate = 0; }
261: | AIGP ORIGINATE { BGP_CC->aigp = 1; BGP_CC->aigp_originate = 1; }
262: | COST expr { BGP_CC->cost = $2; if ($2 < 1) cf_error("Cost must be positive"); }
263: | IGP TABLE rtable {
264: if (BGP_CC->desc->no_igp)
265: cf_error("IGP table not allowed here");
266:
267: if ($3->addr_type == NET_IP4)
268: BGP_CC->igp_table_ip4 = $3;
269: else if ($3->addr_type == NET_IP6)
270: BGP_CC->igp_table_ip6 = $3;
271: else
272: cf_error("Mismatched IGP table type");
273: }
274: ;
275:
276: bgp_channel_opts:
277: /* empty */
278: | bgp_channel_opts bgp_channel_item ';'
279: ;
280:
281: bgp_channel_opt_list:
282: /* empty */
283: | '{' bgp_channel_opts '}'
284: ;
285:
286: bgp_channel_end:
287: {
288: if (!this_channel->table)
289: cf_error("Routing table not specified");
290:
291: this_channel = NULL;
292: };
293:
294: bgp_proto_channel: bgp_channel_start bgp_channel_opt_list bgp_channel_end;
295:
296:
297: dynamic_attr: BGP_ORIGIN
298: { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_ENUM_BGP_ORIGIN, EA_CODE(PROTOCOL_BGP, BA_ORIGIN)); } ;
299: dynamic_attr: BGP_PATH
300: { $$ = f_new_dynamic_attr(EAF_TYPE_AS_PATH, T_PATH, EA_CODE(PROTOCOL_BGP, BA_AS_PATH)); } ;
301: dynamic_attr: BGP_NEXT_HOP
302: { $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, T_IP, EA_CODE(PROTOCOL_BGP, BA_NEXT_HOP)); } ;
303: dynamic_attr: BGP_MED
304: { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_MULTI_EXIT_DISC)); } ;
305: dynamic_attr: BGP_LOCAL_PREF
306: { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_LOCAL_PREF)); } ;
307: dynamic_attr: BGP_ATOMIC_AGGR
308: { $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_ATOMIC_AGGR)); } ;
309: dynamic_attr: BGP_AGGREGATOR
310: { $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_AGGREGATOR)); } ;
311: dynamic_attr: BGP_COMMUNITY
312: { $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY)); } ;
313: dynamic_attr: BGP_ORIGINATOR_ID
314: { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID, T_QUAD, EA_CODE(PROTOCOL_BGP, BA_ORIGINATOR_ID)); } ;
315: dynamic_attr: BGP_CLUSTER_LIST
316: { $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(PROTOCOL_BGP, BA_CLUSTER_LIST)); } ;
317: dynamic_attr: BGP_EXT_COMMUNITY
318: { $$ = f_new_dynamic_attr(EAF_TYPE_EC_SET, T_ECLIST, EA_CODE(PROTOCOL_BGP, BA_EXT_COMMUNITY)); } ;
319: dynamic_attr: BGP_AIGP
320: { $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_AIGP)); } ;
321: dynamic_attr: BGP_LARGE_COMMUNITY
322: { $$ = f_new_dynamic_attr(EAF_TYPE_LC_SET, T_LCLIST, EA_CODE(PROTOCOL_BGP, BA_LARGE_COMMUNITY)); } ;
323:
324:
325:
326: CF_ENUM(T_ENUM_BGP_ORIGIN, ORIGIN_, IGP, EGP, INCOMPLETE)
327:
328: CF_CODE
329:
330: CF_END
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