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);
 111 }
 112
 113 CF_DECLS
 114
 115 CF_KEYWORDS(OSPF, AREA, OSPF_METRIC1, OSPF_METRIC2, OSPF_TAG, OSPF_ROUTER_ID)
 116 CF_KEYWORDS(NEIGHBORS, RFC1583COMPAT, STUB, TICK, COST, COST2, RETRANSMIT)
 117 CF_KEYWORDS(HELLO, TRANSMIT, PRIORITY, DEAD, TYPE, BROADCAST, BCAST)
 118 CF_KEYWORDS(NONBROADCAST, NBMA, POINTOPOINT, PTP, POINTOMULTIPOINT, PTMP)
 119 CF_KEYWORDS(NONE, SIMPLE, AUTHENTICATION, STRICT, CRYPTOGRAPHIC)
 120 CF_KEYWORDS(ELIGIBLE, POLL, NETWORKS, HIDDEN, VIRTUAL, CHECK, LINK)
 121 CF_KEYWORDS(RX, BUFFER, LARGE, NORMAL, STUBNET, HIDDEN, SUMMARY, TAG, EXTERNAL)
 122 CF_KEYWORDS(WAIT, DELAY, LSADB, ECMP, LIMIT, WEIGHT, NSSA, TRANSLATOR, STABILITY)
 123
 124 %type <t> opttext
 125
 126 CF_GRAMMAR
 127
 128 CF_ADDTO(proto, ospf_proto '}' { ospf_proto_finish(); } )
 129
 130 ospf_proto_start: proto_start OSPF {
 131      this_proto = proto_config_new(&proto_ospf, sizeof(struct ospf_config), $1);
 132      init_list(&OSPF_CFG->area_list);
 133      init_list(&OSPF_CFG->vlink_list);
 134      OSPF_CFG->rfc1583 = DEFAULT_RFC1583;
 135      OSPF_CFG->tick = DEFAULT_OSPFTICK;
 136   }
 137  ;
 138
 139 ospf_proto:
 140    ospf_proto_start proto_name '{'
 141  | ospf_proto ospf_proto_item ';'
 142  ;
 143
 144 ospf_proto_item:
 145    proto_item
 146  | RFC1583COMPAT bool { OSPF_CFG->rfc1583 = $2; }
 147  | ECMP bool { OSPF_CFG->ecmp = $2 ? DEFAULT_ECMP_LIMIT : 0; }
 148  | ECMP bool LIMIT expr { OSPF_CFG->ecmp = $2 ? $4 : 0; if ($4 < 0) cf_error("ECMP limit cannot be negative"); }
 149  | TICK expr { OSPF_CFG->tick = $2; if($2<=0) cf_error("Tick must be greater than zero"); }
 150  | ospf_area
 151  ;
 152
 153 ospf_area_start: AREA idval {
 154   this_area = cfg_allocz(sizeof(struct ospf_area_config));
 155   add_tail(&OSPF_CFG->area_list, NODE this_area);
 156   this_area->areaid = $2;
 157   this_area->default_cost = DEFAULT_STUB_COST;
 158   this_area->type = OPT_E;
 159   this_area->transint = DEFAULT_TRANSINT;
 160
 161   init_list(&this_area->patt_list);
 162   init_list(&this_area->net_list);
 163   init_list(&this_area->enet_list);
 164   init_list(&this_area->stubnet_list);
 165  }
 166  ;
 167
 168 ospf_area: ospf_area_start '{' ospf_area_opts '}' { ospf_area_finish(); }
 169  ;
 170
 171 ospf_area_opts:
 172    /* empty */
 173  | ospf_area_opts ospf_area_item ';'
 174  ;
 175
 176 ospf_area_item:
 177    STUB bool { this_area->type = $2 ? 0 : OPT_E; /* We should remove the option */ }
 178  | NSSA { this_area->type = OPT_N; }
 179  | SUMMARY bool { this_area->summary = $2; }
 180  | DEFAULT NSSA bool { this_area->default_nssa = $3; }
 181  | DEFAULT COST expr { this_area->default_cost = $3; check_defcost($3); }
 182  | DEFAULT COST2 expr { this_area->default_cost = $3 | LSA_EXT_EBIT; check_defcost($3); }
 183  | STUB COST expr { this_area->default_cost = $3;  check_defcost($3); }
 184  | TRANSLATOR bool { this_area->translator = $2; }
 185  | TRANSLATOR STABILITY expr { this_area->transint = $3; }
 186  | NETWORKS { this_nets = &this_area->net_list; } '{' pref_list '}'
 187  | EXTERNAL { this_nets = &this_area->enet_list; } '{' pref_list '}'
 188  | STUBNET ospf_stubnet
 189  | INTERFACE ospf_iface
 190  | ospf_vlink
 191  ;
 192
 193 ospf_stubnet:
 194    ospf_stubnet_start '{' ospf_stubnet_opts '}'
 195  | ospf_stubnet_start
 196  ;
 197
 198 ospf_stubnet_start:
 199    prefix {
 200      this_stubnet = cfg_allocz(sizeof(struct ospf_stubnet_config));
 201      add_tail(&this_area->stubnet_list, NODE this_stubnet);
 202      this_stubnet->px = $1;
 203      this_stubnet->cost = COST_D;
 204    }
 205  ;
 206
 207 ospf_stubnet_opts:
 208    /* empty */
 209  | ospf_stubnet_opts ospf_stubnet_item ';'
 210  ;
 211
 212 ospf_stubnet_item:
 213    HIDDEN bool { this_stubnet->hidden = $2; }
 214  | SUMMARY bool { this_stubnet->summary = $2; }
 215  | COST expr { this_stubnet->cost = $2; }
 216  ;
 217
 218 ospf_vlink:
 219    ospf_vlink_start '{' ospf_vlink_opts '}' { ospf_iface_finish(); }
 220  | ospf_vlink_start
 221  ;
 222
 223 ospf_vlink_opts:
 224    /* empty */
 225  | ospf_vlink_opts ospf_vlink_item ';'
 226  ;
 227
 228 ospf_vlink_item:
 229  | HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
 230  | RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
 231  | TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
 232  | WAIT expr { OSPF_PATT->waitint = $2 ; }
 233  | DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
 234  | DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
 235  | AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
 236  | AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
 237  | AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
 238  | password_list
 239  ;
 240
 241 ospf_vlink_start: VIRTUAL LINK idval
 242  {
 243   if (this_area->areaid == 0) cf_error("Virtual link cannot be in backbone");
 244   this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
 245   add_tail(&OSPF_CFG->vlink_list, NODE this_ipatt);
 246   init_list(&this_ipatt->ipn_list);
 247   OSPF_PATT->voa = this_area->areaid;
 248   OSPF_PATT->vid = $3;
 249   OSPF_PATT->helloint = HELLOINT_D;
 250   OSPF_PATT->rxmtint = RXMTINT_D;
 251   OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
 252   OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
 253   OSPF_PATT->deadc = DEADC_D;
 254   OSPF_PATT->deadint = 0;
 255   OSPF_PATT->type = OSPF_IT_VLINK;
 256   init_list(&OSPF_PATT->nbma_list);
 257   OSPF_PATT->autype = OSPF_AUTH_NONE;
 258   reset_passwords();
 259  }
 260 ;
 261
 262 ospf_iface_item:
 263    COST expr { OSPF_PATT->cost = $2 ; if (($2<=0) || ($2>65535)) cf_error("Cost must be in range 1-65535"); }
 264  | HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
 265  | POLL expr { OSPF_PATT->pollint = $2 ; if ($2<=0) cf_error("Poll int must be greater than zero"); }
 266  | RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
 267  | WAIT expr { OSPF_PATT->waitint = $2 ; }
 268  | DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
 269  | DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
 270  | TYPE BROADCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
 271  | TYPE BCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
 272  | TYPE NONBROADCAST { OSPF_PATT->type = OSPF_IT_NBMA ; }
 273  | TYPE NBMA { OSPF_PATT->type = OSPF_IT_NBMA ; }
 274  | TYPE POINTOPOINT { OSPF_PATT->type = OSPF_IT_PTP ; }
 275  | TYPE PTP { OSPF_PATT->type = OSPF_IT_PTP ; }
 276  | TYPE POINTOMULTIPOINT { OSPF_PATT->type = OSPF_IT_PTMP ; }
 277  | TYPE PTMP { OSPF_PATT->type = OSPF_IT_PTMP ; }
 278  | TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
 279  | PRIORITY expr { OSPF_PATT->priority = $2 ; if (($2<0) || ($2>255)) cf_error("Priority must be in range 0-255"); }
 280  | STRICT NONBROADCAST bool { OSPF_PATT->strictnbma = $3 ; }
 281  | STUB bool { OSPF_PATT->stub = $2 ; }
 282  | CHECK LINK bool { OSPF_PATT->check_link = $3; }
 283  | ECMP WEIGHT expr { OSPF_PATT->ecmp_weight = $3 - 1; if (($3<1) || ($3>256)) cf_error("ECMP weight must be in range 1-256"); }
 284  | NEIGHBORS '{' ipa_list '}'
 285  | AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
 286  | AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
 287  | AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
 288  | RX BUFFER LARGE { OSPF_PATT->rxbuf = OSPF_RXBUF_LARGE ; }
 289  | RX BUFFER NORMAL { OSPF_PATT->rxbuf = OSPF_RXBUF_NORMAL ; }
 290  | 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"); }
 291  | password_list
 292  ;
 293
 294 pref_list:
 295  /* empty */
 296  | pref_list pref_item
 297  ;
 298
 299 pref_item: pref_base pref_opt ';' ;
 300
 301 pref_base: prefix
 302  {
 303    this_pref = cfg_allocz(sizeof(struct area_net_config));
 304    add_tail(this_nets, NODE this_pref);
 305    this_pref->px.addr = $1.addr;
 306    this_pref->px.len = $1.len;
 307  }
 308 ;
 309
 310 pref_opt:
 311  /* empty */
 312  | HIDDEN { this_pref->hidden = 1; }
 313  | TAG expr { this_pref->tag = $2; }
 314  ;
 315
 316 ipa_list:
 317  /* empty */
 318  | ipa_list ipa_item
 319  ;
 320
 321 ipa_item:
 322     ipa_el
 323   | ipa_ne;
 324
 325 ipa_el: IPA ';'
 326  {
 327    this_nbma = cfg_allocz(sizeof(struct nbma_node));
 328    add_tail(&OSPF_PATT->nbma_list, NODE this_nbma);
 329    this_nbma->ip=$1;
 330    this_nbma->eligible=0;
 331  }
 332 ;
 333
 334 ipa_ne: IPA ELIGIBLE ';'
 335  {
 336    this_nbma = cfg_allocz(sizeof(struct nbma_node));
 337    add_tail(&OSPF_PATT->nbma_list, NODE this_nbma);
 338    this_nbma->ip=$1;
 339    this_nbma->eligible=1;
 340  }
 341 ;
 342
 343
 344 ospf_iface_start:
 345  {
 346   this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
 347   add_tail(&this_area->patt_list, NODE this_ipatt);
 348   init_list(&this_ipatt->ipn_list);
 349   OSPF_PATT->cost = COST_D;
 350   OSPF_PATT->helloint = HELLOINT_D;
 351   OSPF_PATT->pollint = POLLINT_D;
 352   OSPF_PATT->rxmtint = RXMTINT_D;
 353   OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
 354   OSPF_PATT->priority = PRIORITY_D;
 355   OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
 356   OSPF_PATT->deadc = DEADC_D;
 357   OSPF_PATT->deadint = 0;
 358   OSPF_PATT->type = OSPF_IT_UNDEF;
 359   init_list(&OSPF_PATT->nbma_list);
 360   OSPF_PATT->autype = OSPF_AUTH_NONE;
 361   reset_passwords();
 362  }
 363 ;
 364
 365 ospf_iface_opts:
 366    /* empty */
 367  | ospf_iface_opts ospf_iface_item ';'
 368  ;
 369
 370 ospf_iface_opt_list:
 371    /* empty */
 372  | '{' ospf_iface_opts '}'
 373  ;
 374
 375 ospf_iface:
 376   ospf_iface_start iface_patt_list ospf_iface_opt_list { ospf_iface_finish(); }
 377  ;
 378
 379 opttext:
 380     TEXT
 381  | /* empty */ { $$ = NULL; }
 382  ;
 383
 384 CF_ADDTO(dynamic_attr, OSPF_METRIC1 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC1); })
 385 CF_ADDTO(dynamic_attr, OSPF_METRIC2 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC2); })
 386 CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_TAG); })
 387 CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID | EAF_TEMP, T_QUAD, EA_OSPF_ROUTER_ID); })
 388
 389 CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol]])
 390 { ospf_sh(proto_get_named($3, &proto_ospf)); };
 391
 392 CF_CLI(SHOW OSPF NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about OSPF neighbors]])
 393 { ospf_sh_neigh(proto_get_named($4, &proto_ospf), $5); };
 394
 395 CF_CLI(SHOW OSPF INTERFACE, optsym opttext, [<name>] [\"<interface>\"], [[Show information about interface]])
 396 { ospf_sh_iface(proto_get_named($4, &proto_ospf), $5); };
 397
 398 CF_CLI_HELP(SHOW OSPF TOPOLOGY, [all] [<name>], [[Show information about OSPF network topology]])
 399
 400 CF_CLI(SHOW OSPF TOPOLOGY, optsym opttext, [<name>], [[Show information about reachable OSPF network topology]])
 401 { ospf_sh_state(proto_get_named($4, &proto_ospf), 0, 1); };
 402
 403 CF_CLI(SHOW OSPF TOPOLOGY ALL, optsym opttext, [<name>], [[Show information about all OSPF network topology]])
 404 { ospf_sh_state(proto_get_named($5, &proto_ospf), 0, 0); };
 405
 406 CF_CLI_HELP(SHOW OSPF STATE, [all] [<name>], [[Show information about OSPF network state]])
 407
 408 CF_CLI(SHOW OSPF STATE, optsym opttext, [<name>], [[Show information about reachable OSPF network state]])
 409 { ospf_sh_state(proto_get_named($4, &proto_ospf), 1, 1); };
 410
 411 CF_CLI(SHOW OSPF STATE ALL, optsym opttext, [<name>], [[Show information about all OSPF network state]])
 412 { ospf_sh_state(proto_get_named($5, &proto_ospf), 1, 0); };
 413
 414 CF_CLI(SHOW OSPF LSADB, optsym opttext, [<name>], [[Show content of OSPF LSA database]])
 415 { ospf_sh_lsadb(proto_get_named($4, &proto_ospf)); };
 416
 417 CF_CODE
 418
 419 CF_END