proto/ospf/config.Y

   1 /*
   2  *      BIRD -- OSPF Configuration
   3  *
   4  *      (c) 1999--2004 Ondrej Filip <feela@network.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/ospf/ospf.h"
  12
  13 CF_DEFINES
  14
  15 #define OSPF_CFG ((struct ospf_config *) this_proto)
  16 #define OSPF_PATT ((struct ospf_iface_patt *) this_ipatt)
  17
  18 static struct ospf_area_config *this_area;
  19 static struct nbma_node *this_nbma;
  20 static list *this_nets;
  21 static struct area_net_config *this_pref;
  22 static struct ospf_stubnet_config *this_stubnet;
  23
  24 #ifdef OSPFv2
  25 static void
  26 ospf_iface_finish(void)
  27 {
  28   struct ospf_iface_patt *ip = OSPF_PATT;
  29
  30   if (ip->deadint == 0)
  31     ip->deadint = ip->deadc * ip->helloint;
  32
  33   ip->passwords = get_passwords();
  34
  35   if ((ip->autype == OSPF_AUTH_CRYPT) && (ip->helloint < 5))
  36     log(L_WARN "Hello or poll interval less that 5 makes cryptographic authenication prone to replay attacks");
  37
  38   if ((ip->autype == OSPF_AUTH_NONE) && (ip->passwords != NULL))
  39     log(L_WARN "Password option without authentication option does not make sense");
  40 }
  41 #endif
  42
  43 #ifdef OSPFv3
  44 static void
  45 ospf_iface_finish(void)
  46 {
  47   struct ospf_iface_patt *ip = OSPF_PATT;
  48
  49   if (ip->deadint == 0)
  50     ip->deadint = ip->deadc * ip->helloint;
  51
  52   if ((ip->autype != OSPF_AUTH_NONE) || (get_passwords() != NULL))
  53     cf_error("Authentication not supported in OSPFv3");
  54 }
  55 #endif
  56
  57 static void
  58 ospf_area_finish(void)
  59 {
  60   if ((this_area->areaid == 0) && (this_area->type != OPT_E))
  61     cf_error("Backbone area cannot be stub/NSSA");
  62
  63   if (this_area->summary && (this_area->type == OPT_E))
  64     cf_error("Only Stub/NSSA areas can use summary propagation");
  65
  66   if (this_area->default_nssa && ((this_area->type != OPT_N) || ! this_area->summary))
  67     cf_error("Only NSSA areas with summary propagation can use NSSA default route");
  68
  69   if ((this_area->default_cost & LSA_EXT_EBIT) && ! this_area->default_nssa)
  70     cf_error("Only NSSA default route can use type 2 metric");
  71 }
  72
  73 static void
  74 ospf_proto_finish(void)
  75 {
  76   struct ospf_config *cf = OSPF_CFG;
  77
  78   if (EMPTY_LIST(cf->area_list))
  79     cf_error( "No configured areas in OSPF");
  80
  81   int areano = 0;
  82   int backbone = 0;
  83   struct ospf_area_config *ac;
  84   WALK_LIST(ac, cf->area_list)
  85   {
  86     areano++;
  87     if (ac->areaid == 0)
  88      backbone = 1;
  89   }
  90   cf->abr = areano > 1;
  91
  92   if (cf->abr && !backbone)
  93   {
  94     struct ospf_area_config *ac = cfg_allocz(sizeof(struct ospf_area_config));
  95     add_head(&cf->area_list, NODE ac);
  96     init_list(&ac->patt_list);
  97     init_list(&ac->net_list);
  98     init_list(&ac->enet_list);
  99     init_list(&ac->stubnet_list);
 100   }
 101
 102   if (!cf->abr && !EMPTY_LIST(cf->vlink_list))
 103     cf_error( "Vlinks cannot be used on single area router");
 104 }
 105
 106 static inline void
 107 check_defcost(int cost)
 108 {
 109   if ((cost <= 0) || (cost >= LSINFINITY))
 110    cf_error("Default cost must be in range 1-%d", LSINFINITY-1);
 111 }
 112
 113 static inline void
 114 set_instance_id(unsigned id)
 115 {
 116 #ifdef OSPFv3
 117   OSPF_PATT->instance_id = id;
 118 #else
 119   cf_error("Instance ID requires OSPFv3");
 120 #endif
 121 }
 122
 123 CF_DECLS
 124
 125 CF_KEYWORDS(OSPF, AREA, OSPF_METRIC1, OSPF_METRIC2, OSPF_TAG, OSPF_ROUTER_ID)
 126 CF_KEYWORDS(NEIGHBORS, RFC1583COMPAT, STUB, TICK, COST, COST2, RETRANSMIT)
 127 CF_KEYWORDS(HELLO, TRANSMIT, PRIORITY, DEAD, TYPE, BROADCAST, BCAST)
 128 CF_KEYWORDS(NONBROADCAST, NBMA, POINTOPOINT, PTP, POINTOMULTIPOINT, PTMP)
 129 CF_KEYWORDS(NONE, SIMPLE, AUTHENTICATION, STRICT, CRYPTOGRAPHIC)
 130 CF_KEYWORDS(ELIGIBLE, POLL, NETWORKS, HIDDEN, VIRTUAL, CHECK, LINK)
 131 CF_KEYWORDS(RX, BUFFER, LARGE, NORMAL, STUBNET, HIDDEN, SUMMARY, TAG, EXTERNAL)
 132 CF_KEYWORDS(WAIT, DELAY, LSADB, ECMP, LIMIT, WEIGHT, NSSA, TRANSLATOR, STABILITY)
 133 CF_KEYWORDS(GLOBAL, LSID, ROUTER, SELF, INSTANCE, REAL)
 134
 135 %type <t> opttext
 136 %type <ld> lsadb_args
 137
 138 CF_GRAMMAR
 139
 140 CF_ADDTO(proto, ospf_proto '}' { ospf_proto_finish(); } )
 141
 142 ospf_proto_start: proto_start OSPF {
 143      this_proto = proto_config_new(&proto_ospf, sizeof(struct ospf_config), $1);
 144      init_list(&OSPF_CFG->area_list);
 145      init_list(&OSPF_CFG->vlink_list);
 146      OSPF_CFG->rfc1583 = DEFAULT_RFC1583;
 147      OSPF_CFG->tick = DEFAULT_OSPFTICK;
 148   }
 149  ;
 150
 151 ospf_proto:
 152    ospf_proto_start proto_name '{'
 153  | ospf_proto ospf_proto_item ';'
 154  ;
 155
 156 ospf_proto_item:
 157    proto_item
 158  | RFC1583COMPAT bool { OSPF_CFG->rfc1583 = $2; }
 159  | ECMP bool { OSPF_CFG->ecmp = $2 ? DEFAULT_ECMP_LIMIT : 0; }
 160  | ECMP bool LIMIT expr { OSPF_CFG->ecmp = $2 ? $4 : 0; if ($4 < 0) cf_error("ECMP limit cannot be negative"); }
 161  | TICK expr { OSPF_CFG->tick = $2; if($2<=0) cf_error("Tick must be greater than zero"); }
 162  | ospf_area
 163  ;
 164
 165 ospf_area_start: AREA idval {
 166   this_area = cfg_allocz(sizeof(struct ospf_area_config));
 167   add_tail(&OSPF_CFG->area_list, NODE this_area);
 168   this_area->areaid = $2;
 169   this_area->default_cost = DEFAULT_STUB_COST;
 170   this_area->type = OPT_E;
 171   this_area->transint = DEFAULT_TRANSINT;
 172
 173   init_list(&this_area->patt_list);
 174   init_list(&this_area->net_list);
 175   init_list(&this_area->enet_list);
 176   init_list(&this_area->stubnet_list);
 177  }
 178  ;
 179
 180 ospf_area: ospf_area_start '{' ospf_area_opts '}' { ospf_area_finish(); }
 181  ;
 182
 183 ospf_area_opts:
 184    /* empty */
 185  | ospf_area_opts ospf_area_item ';'
 186  ;
 187
 188 ospf_area_item:
 189    STUB bool { this_area->type = $2 ? 0 : OPT_E; /* We should remove the option */ }
 190  | NSSA { this_area->type = OPT_N; }
 191  | SUMMARY bool { this_area->summary = $2; }
 192  | DEFAULT NSSA bool { this_area->default_nssa = $3; }
 193  | DEFAULT COST expr { this_area->default_cost = $3; check_defcost($3); }
 194  | DEFAULT COST2 expr { this_area->default_cost = $3 | LSA_EXT_EBIT; check_defcost($3); }
 195  | STUB COST expr { this_area->default_cost = $3;  check_defcost($3); }
 196  | TRANSLATOR bool { this_area->translator = $2; }
 197  | TRANSLATOR STABILITY expr { this_area->transint = $3; }
 198  | NETWORKS { this_nets = &this_area->net_list; } '{' pref_list '}'
 199  | EXTERNAL { this_nets = &this_area->enet_list; } '{' pref_list '}'
 200  | STUBNET ospf_stubnet
 201  | INTERFACE ospf_iface
 202  | ospf_vlink
 203  ;
 204
 205 ospf_stubnet:
 206    ospf_stubnet_start '{' ospf_stubnet_opts '}'
 207  | ospf_stubnet_start
 208  ;
 209
 210 ospf_stubnet_start:
 211    prefix {
 212      this_stubnet = cfg_allocz(sizeof(struct ospf_stubnet_config));
 213      add_tail(&this_area->stubnet_list, NODE this_stubnet);
 214      this_stubnet->px = $1;
 215      this_stubnet->cost = COST_D;
 216    }
 217  ;
 218
 219 ospf_stubnet_opts:
 220    /* empty */
 221  | ospf_stubnet_opts ospf_stubnet_item ';'
 222  ;
 223
 224 ospf_stubnet_item:
 225    HIDDEN bool { this_stubnet->hidden = $2; }
 226  | SUMMARY bool { this_stubnet->summary = $2; }
 227  | COST expr { this_stubnet->cost = $2; }
 228  ;
 229
 230 ospf_vlink:
 231    ospf_vlink_start ospf_instance_id '{' ospf_vlink_opts '}' { ospf_iface_finish(); }
 232  | ospf_vlink_start ospf_instance_id { ospf_iface_finish(); }
 233  ;
 234
 235 ospf_vlink_opts:
 236    /* empty */
 237  | ospf_vlink_opts ospf_vlink_item ';'
 238  ;
 239
 240 ospf_vlink_item:
 241  | HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
 242  | RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
 243  | TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
 244  | WAIT expr { OSPF_PATT->waitint = $2 ; }
 245  | DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
 246  | DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
 247  | AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
 248  | AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
 249  | AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
 250  | password_list
 251  ;
 252
 253 ospf_vlink_start: VIRTUAL LINK idval
 254  {
 255   if (this_area->areaid == 0) cf_error("Virtual link cannot be in backbone");
 256   this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
 257   add_tail(&OSPF_CFG->vlink_list, NODE this_ipatt);
 258   init_list(&this_ipatt->ipn_list);
 259   OSPF_PATT->voa = this_area->areaid;
 260   OSPF_PATT->vid = $3;
 261   OSPF_PATT->helloint = HELLOINT_D;
 262   OSPF_PATT->rxmtint = RXMTINT_D;
 263   OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
 264   OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
 265   OSPF_PATT->deadc = DEADC_D;
 266   OSPF_PATT->deadint = 0;
 267   OSPF_PATT->type = OSPF_IT_VLINK;
 268   init_list(&OSPF_PATT->nbma_list);
 269   OSPF_PATT->autype = OSPF_AUTH_NONE;
 270   reset_passwords();
 271  }
 272 ;
 273
 274 ospf_iface_item:
 275    COST expr { OSPF_PATT->cost = $2 ; if (($2<=0) || ($2>65535)) cf_error("Cost must be in range 1-65535"); }
 276  | HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
 277  | POLL expr { OSPF_PATT->pollint = $2 ; if ($2<=0) cf_error("Poll int must be greater than zero"); }
 278  | RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
 279  | WAIT expr { OSPF_PATT->waitint = $2 ; }
 280  | DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
 281  | DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
 282  | TYPE BROADCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
 283  | TYPE BCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
 284  | TYPE NONBROADCAST { OSPF_PATT->type = OSPF_IT_NBMA ; }
 285  | TYPE NBMA { OSPF_PATT->type = OSPF_IT_NBMA ; }
 286  | TYPE POINTOPOINT { OSPF_PATT->type = OSPF_IT_PTP ; }
 287  | TYPE PTP { OSPF_PATT->type = OSPF_IT_PTP ; }
 288  | TYPE POINTOMULTIPOINT { OSPF_PATT->type = OSPF_IT_PTMP ; }
 289  | TYPE PTMP { OSPF_PATT->type = OSPF_IT_PTMP ; }
 290  | REAL BROADCAST bool { OSPF_PATT->real_bcast = $3; if (OSPF_VERSION != 2) cf_error("Real broadcast option requires OSPFv2"); }
 291  | TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
 292  | PRIORITY expr { OSPF_PATT->priority = $2 ; if (($2<0) || ($2>255)) cf_error("Priority must be in range 0-255"); }
 293  | STRICT NONBROADCAST bool { OSPF_PATT->strictnbma = $3 ; }
 294  | STUB bool { OSPF_PATT->stub = $2 ; }
 295  | CHECK LINK bool { OSPF_PATT->check_link = $3; }
 296  | ECMP WEIGHT expr { OSPF_PATT->ecmp_weight = $3 - 1; if (($3<1) || ($3>256)) cf_error("ECMP weight must be in range 1-256"); }
 297  | NEIGHBORS '{' ipa_list '}'
 298  | AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
 299  | AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
 300  | AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
 301  | RX BUFFER LARGE { OSPF_PATT->rxbuf = OSPF_RXBUF_LARGE ; }
 302  | RX BUFFER NORMAL { OSPF_PATT->rxbuf = OSPF_RXBUF_NORMAL ; }
 303  | RX BUFFER expr { OSPF_PATT->rxbuf = $3 ; if (($3 < OSPF_RXBUF_MINSIZE) || ($3 > OSPF_MAX_PKT_SIZE)) cf_error("Buffer size must be in range 256-65535"); }
 304  | password_list
 305  ;
 306
 307 pref_list:
 308  /* empty */
 309  | pref_list pref_item
 310  ;
 311
 312 pref_item: pref_base pref_opt ';' ;
 313
 314 pref_base: prefix
 315  {
 316    this_pref = cfg_allocz(sizeof(struct area_net_config));
 317    add_tail(this_nets, NODE this_pref);
 318    this_pref->px.addr = $1.addr;
 319    this_pref->px.len = $1.len;
 320  }
 321 ;
 322
 323 pref_opt:
 324  /* empty */
 325  | HIDDEN { this_pref->hidden = 1; }
 326  | TAG expr { this_pref->tag = $2; }
 327  ;
 328
 329 ipa_list:
 330  /* empty */
 331  | ipa_list ipa_item
 332  ;
 333
 334 ipa_item:
 335     ipa_el
 336   | ipa_ne;
 337
 338 ipa_el: IPA ';'
 339  {
 340    this_nbma = cfg_allocz(sizeof(struct nbma_node));
 341    add_tail(&OSPF_PATT->nbma_list, NODE this_nbma);
 342    this_nbma->ip=$1;
 343    this_nbma->eligible=0;
 344  }
 345 ;
 346
 347 ipa_ne: IPA ELIGIBLE ';'
 348  {
 349    this_nbma = cfg_allocz(sizeof(struct nbma_node));
 350    add_tail(&OSPF_PATT->nbma_list, NODE this_nbma);
 351    this_nbma->ip=$1;
 352    this_nbma->eligible=1;
 353  }
 354 ;
 355
 356
 357 ospf_iface_start:
 358  {
 359   this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
 360   add_tail(&this_area->patt_list, NODE this_ipatt);
 361   init_list(&this_ipatt->ipn_list);
 362   OSPF_PATT->cost = COST_D;
 363   OSPF_PATT->helloint = HELLOINT_D;
 364   OSPF_PATT->pollint = POLLINT_D;
 365   OSPF_PATT->rxmtint = RXMTINT_D;
 366   OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
 367   OSPF_PATT->priority = PRIORITY_D;
 368   OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
 369   OSPF_PATT->deadc = DEADC_D;
 370   OSPF_PATT->deadint = 0;
 371   OSPF_PATT->type = OSPF_IT_UNDEF;
 372   init_list(&OSPF_PATT->nbma_list);
 373   OSPF_PATT->autype = OSPF_AUTH_NONE;
 374   reset_passwords();
 375  }
 376 ;
 377
 378 ospf_instance_id:
 379    /* empty */
 380  | INSTANCE expr { set_instance_id($2); }
 381  ;
 382
 383 ospf_iface_opts:
 384    /* empty */
 385  | ospf_iface_opts ospf_iface_item ';'
 386  ;
 387
 388 ospf_iface_opt_list:
 389    /* empty */
 390  | '{' ospf_iface_opts '}'
 391  ;
 392
 393 ospf_iface:
 394   ospf_iface_start iface_patt_list ospf_instance_id ospf_iface_opt_list { ospf_iface_finish(); }
 395  ;
 396
 397 opttext:
 398     TEXT
 399  | /* empty */ { $$ = NULL; }
 400  ;
 401
 402 CF_ADDTO(dynamic_attr, OSPF_METRIC1 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC1); })
 403 CF_ADDTO(dynamic_attr, OSPF_METRIC2 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC2); })
 404 CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_TAG); })
 405 CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID | EAF_TEMP, T_QUAD, EA_OSPF_ROUTER_ID); })
 406
 407 CF_CLI_HELP(SHOW OSPF, ..., [[Show information about OSPF protocol]]);
 408 CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol XXX]])
 409 { ospf_sh(proto_get_named($3, &proto_ospf)); };
 410
 411 CF_CLI(SHOW OSPF NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about OSPF neighbors]])
 412 { ospf_sh_neigh(proto_get_named($4, &proto_ospf), $5); };
 413
 414 CF_CLI(SHOW OSPF INTERFACE, optsym opttext, [<name>] [\"<interface>\"], [[Show information about interface]])
 415 { ospf_sh_iface(proto_get_named($4, &proto_ospf), $5); };
 416
 417 CF_CLI_HELP(SHOW OSPF TOPOLOGY, [all] [<name>], [[Show information about OSPF network topology]])
 418
 419 CF_CLI(SHOW OSPF TOPOLOGY, optsym opttext, [<name>], [[Show information about reachable OSPF network topology]])
 420 { ospf_sh_state(proto_get_named($4, &proto_ospf), 0, 1); };
 421
 422 CF_CLI(SHOW OSPF TOPOLOGY ALL, optsym opttext, [<name>], [[Show information about all OSPF network topology]])
 423 { ospf_sh_state(proto_get_named($5, &proto_ospf), 0, 0); };
 424
 425 CF_CLI_HELP(SHOW OSPF STATE, [all] [<name>], [[Show information about OSPF network state]])
 426
 427 CF_CLI(SHOW OSPF STATE, optsym opttext, [<name>], [[Show information about reachable OSPF network state]])
 428 { ospf_sh_state(proto_get_named($4, &proto_ospf), 1, 1); };
 429
 430 CF_CLI(SHOW OSPF STATE ALL, optsym opttext, [<name>], [[Show information about all OSPF network state]])
 431 { ospf_sh_state(proto_get_named($5, &proto_ospf), 1, 0); };
 432
 433 CF_CLI_HELP(SHOW OSPF LSADB, ..., [[Show content of OSPF LSA database]]);
 434 CF_CLI(SHOW OSPF LSADB, lsadb_args, [global | area <id> | link] [type <num>] [lsid <id>] [self | router <id>] [<proto>], [[Show content of OSPF LSA database]])
 435 { ospf_sh_lsadb($4); };
 436
 437 lsadb_args:
 438    /* empty */ {
 439      $$ = cfg_allocz(sizeof(struct lsadb_show_data));
 440    }
 441  | lsadb_args GLOBAL { $$ = $1; $$->scope = LSA_SCOPE_AS; }
 442  | lsadb_args AREA idval { $$ = $1; $$->scope = LSA_SCOPE_AREA; $$->area = $3 }
 443  | lsadb_args LINK { $$ = $1; $$->scope = 1; /* hack, 0 is no filter */ }
 444  | lsadb_args TYPE NUM { $$ = $1; $$->type = $3; }
 445  | lsadb_args LSID idval { $$ = $1; $$->lsid = $3; }
 446  | lsadb_args SELF { $$ = $1; $$->router = SH_ROUTER_SELF; }
 447  | lsadb_args ROUTER idval { $$ = $1; $$->router = $3; }
 448  | lsadb_args SYM { $$ = $1; $$->name = $2; }
 449  ;
 450
 451 CF_CODE
 452
 453 CF_END