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     ac->type = OPT_E; /* Backbone is non-stub */
  96     add_head(&cf->area_list, NODE ac);
  97     init_list(&ac->patt_list);
  98     init_list(&ac->net_list);
  99     init_list(&ac->enet_list);
 100     init_list(&ac->stubnet_list);
 101   }
 102
 103   if (!cf->abr && !EMPTY_LIST(cf->vlink_list))
 104     cf_error( "Vlinks cannot be used on single area router");
 105 }
 106
 107 static inline void
 108 check_defcost(int cost)
 109 {
 110   if ((cost <= 0) || (cost >= LSINFINITY))
 111    cf_error("Default cost must be in range 1-%d", LSINFINITY-1);
 112 }
 113
 114 static inline void
 115 set_instance_id(unsigned id)
 116 {
 117 #ifdef OSPFv3
 118   OSPF_PATT->instance_id = id;
 119 #else
 120   cf_error("Instance ID requires OSPFv3");
 121 #endif
 122 }
 123
 124 CF_DECLS
 125
 126 CF_KEYWORDS(OSPF, AREA, OSPF_METRIC1, OSPF_METRIC2, OSPF_TAG, OSPF_ROUTER_ID)
 127 CF_KEYWORDS(NEIGHBORS, RFC1583COMPAT, STUB, TICK, COST, COST2, RETRANSMIT)
 128 CF_KEYWORDS(HELLO, TRANSMIT, PRIORITY, DEAD, TYPE, BROADCAST, BCAST, DEFAULT)
 129 CF_KEYWORDS(NONBROADCAST, NBMA, POINTOPOINT, PTP, POINTOMULTIPOINT, PTMP)
 130 CF_KEYWORDS(NONE, SIMPLE, AUTHENTICATION, STRICT, CRYPTOGRAPHIC, TTL, SECURITY)
 131 CF_KEYWORDS(ELIGIBLE, POLL, NETWORKS, HIDDEN, VIRTUAL, CHECK, LINK, ONLY, BFD)
 132 CF_KEYWORDS(RX, BUFFER, LARGE, NORMAL, STUBNET, HIDDEN, SUMMARY, TAG, EXTERNAL)
 133 CF_KEYWORDS(WAIT, DELAY, LSADB, ECMP, LIMIT, WEIGHT, NSSA, TRANSLATOR, STABILITY)
 134 CF_KEYWORDS(GLOBAL, LSID, ROUTER, SELF, INSTANCE, REAL, NETMASK, TX, PRIORITY, LENGTH)
 135 CF_KEYWORDS(SECONDARY)
 136
 137 %type <t> opttext
 138 %type <ld> lsadb_args
 139 %type <i> nbma_eligible
 140
 141 CF_GRAMMAR
 142
 143 CF_ADDTO(proto, ospf_proto '}' { ospf_proto_finish(); } )
 144
 145 ospf_proto_start: proto_start OSPF {
 146      this_proto = proto_config_new(&proto_ospf, sizeof(struct ospf_config), $1);
 147      init_list(&OSPF_CFG->area_list);
 148      init_list(&OSPF_CFG->vlink_list);
 149      OSPF_CFG->rfc1583 = DEFAULT_RFC1583;
 150      OSPF_CFG->tick = DEFAULT_OSPFTICK;
 151   }
 152  ;
 153
 154 ospf_proto:
 155    ospf_proto_start proto_name '{'
 156  | ospf_proto ospf_proto_item ';'
 157  ;
 158
 159 ospf_proto_item:
 160    proto_item
 161  | RFC1583COMPAT bool { OSPF_CFG->rfc1583 = $2; }
 162  | STUB ROUTER bool { OSPF_CFG->stub_router = $3; }
 163  | ECMP bool { OSPF_CFG->ecmp = $2 ? DEFAULT_ECMP_LIMIT : 0; }
 164  | ECMP bool LIMIT expr { OSPF_CFG->ecmp = $2 ? $4 : 0; if ($4 < 0) cf_error("ECMP limit cannot be negative"); }
 165  | TICK expr { OSPF_CFG->tick = $2; if($2<=0) cf_error("Tick must be greater than zero"); }
 166  | ospf_area
 167  ;
 168
 169 ospf_area_start: AREA idval {
 170   this_area = cfg_allocz(sizeof(struct ospf_area_config));
 171   add_tail(&OSPF_CFG->area_list, NODE this_area);
 172   this_area->areaid = $2;
 173   this_area->default_cost = DEFAULT_STUB_COST;
 174   this_area->type = OPT_E;
 175   this_area->transint = DEFAULT_TRANSINT;
 176
 177   init_list(&this_area->patt_list);
 178   init_list(&this_area->net_list);
 179   init_list(&this_area->enet_list);
 180   init_list(&this_area->stubnet_list);
 181  }
 182  ;
 183
 184 ospf_area: ospf_area_start '{' ospf_area_opts '}' { ospf_area_finish(); }
 185  ;
 186
 187 ospf_area_opts:
 188    /* empty */
 189  | ospf_area_opts ospf_area_item ';'
 190  ;
 191
 192 ospf_area_item:
 193    STUB bool { this_area->type = $2 ? 0 : OPT_E; /* We should remove the option */ }
 194  | NSSA { this_area->type = OPT_N; }
 195  | SUMMARY bool { this_area->summary = $2; }
 196  | DEFAULT NSSA bool { this_area->default_nssa = $3; }
 197  | DEFAULT COST expr { this_area->default_cost = $3; check_defcost($3); }
 198  | DEFAULT COST2 expr { this_area->default_cost = $3 | LSA_EXT_EBIT; check_defcost($3); }
 199  | STUB COST expr { this_area->default_cost = $3;  check_defcost($3); }
 200  | TRANSLATOR bool { this_area->translator = $2; }
 201  | TRANSLATOR STABILITY expr { this_area->transint = $3; }
 202  | NETWORKS { this_nets = &this_area->net_list; } '{' pref_list '}'
 203  | EXTERNAL { this_nets = &this_area->enet_list; } '{' pref_list '}'
 204  | STUBNET ospf_stubnet
 205  | INTERFACE ospf_iface
 206  | ospf_vlink
 207  ;
 208
 209 ospf_stubnet:
 210    ospf_stubnet_start '{' ospf_stubnet_opts '}'
 211  | ospf_stubnet_start
 212  ;
 213
 214 ospf_stubnet_start:
 215    prefix {
 216      this_stubnet = cfg_allocz(sizeof(struct ospf_stubnet_config));
 217      add_tail(&this_area->stubnet_list, NODE this_stubnet);
 218      this_stubnet->px = $1;
 219      this_stubnet->cost = COST_D;
 220    }
 221  ;
 222
 223 ospf_stubnet_opts:
 224    /* empty */
 225  | ospf_stubnet_opts ospf_stubnet_item ';'
 226  ;
 227
 228 ospf_stubnet_item:
 229    HIDDEN bool { this_stubnet->hidden = $2; }
 230  | SUMMARY bool { this_stubnet->summary = $2; }
 231  | COST expr { this_stubnet->cost = $2; }
 232  ;
 233
 234 ospf_vlink:
 235    ospf_vlink_start ospf_instance_id '{' ospf_vlink_opts '}' { ospf_iface_finish(); }
 236  | ospf_vlink_start ospf_instance_id { ospf_iface_finish(); }
 237  ;
 238
 239 ospf_vlink_opts:
 240    /* empty */
 241  | ospf_vlink_opts ospf_vlink_item ';'
 242  ;
 243
 244 ospf_vlink_item:
 245  | HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
 246  | RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
 247  | TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
 248  | WAIT expr { OSPF_PATT->waitint = $2 ; }
 249  | DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
 250  | DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
 251  | AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
 252  | AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
 253  | AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
 254  | password_list
 255  ;
 256
 257 ospf_vlink_start: VIRTUAL LINK idval
 258  {
 259   if (this_area->areaid == 0) cf_error("Virtual link cannot be in backbone");
 260   this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
 261   add_tail(&OSPF_CFG->vlink_list, NODE this_ipatt);
 262   init_list(&this_ipatt->ipn_list);
 263   OSPF_PATT->voa = this_area->areaid;
 264   OSPF_PATT->vid = $3;
 265   OSPF_PATT->helloint = HELLOINT_D;
 266   OSPF_PATT->rxmtint = RXMTINT_D;
 267   OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
 268   OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
 269   OSPF_PATT->deadc = DEADC_D;
 270   OSPF_PATT->deadint = 0;
 271   OSPF_PATT->type = OSPF_IT_VLINK;
 272   init_list(&OSPF_PATT->nbma_list);
 273   OSPF_PATT->autype = OSPF_AUTH_NONE;
 274   reset_passwords();
 275  }
 276 ;
 277
 278 ospf_iface_item:
 279    COST expr { OSPF_PATT->cost = $2 ; if (($2<=0) || ($2>65535)) cf_error("Cost must be in range 1-65535"); }
 280  | HELLO expr { OSPF_PATT->helloint = $2 ; if (($2<=0) || ($2>65535)) cf_error("Hello interval must be in range 1-65535"); }
 281  | POLL expr { OSPF_PATT->pollint = $2 ; if ($2<=0) cf_error("Poll int must be greater than zero"); }
 282  | RETRANSMIT expr { OSPF_PATT->rxmtint = $2 ; if ($2<=0) cf_error("Retransmit int must be greater than zero"); }
 283  | WAIT expr { OSPF_PATT->waitint = $2 ; }
 284  | DEAD expr { OSPF_PATT->deadint = $2 ; if ($2<=1) cf_error("Dead interval must be greater than one"); }
 285  | DEAD COUNT expr { OSPF_PATT->deadc = $3 ; if ($3<=1) cf_error("Dead count must be greater than one"); }
 286  | TYPE BROADCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
 287  | TYPE BCAST { OSPF_PATT->type = OSPF_IT_BCAST ; }
 288  | TYPE NONBROADCAST { OSPF_PATT->type = OSPF_IT_NBMA ; }
 289  | TYPE NBMA { OSPF_PATT->type = OSPF_IT_NBMA ; }
 290  | TYPE POINTOPOINT { OSPF_PATT->type = OSPF_IT_PTP ; }
 291  | TYPE PTP { OSPF_PATT->type = OSPF_IT_PTP ; }
 292  | TYPE POINTOMULTIPOINT { OSPF_PATT->type = OSPF_IT_PTMP ; }
 293  | TYPE PTMP { OSPF_PATT->type = OSPF_IT_PTMP ; }
 294  | REAL BROADCAST bool { OSPF_PATT->real_bcast = $3; if (OSPF_VERSION != 2) cf_error("Real broadcast option requires OSPFv2"); }
 295  | PTP NETMASK bool { OSPF_PATT->ptp_netmask = $3; if (OSPF_VERSION != 2) cf_error("Real netmask option requires OSPFv2"); }
 296  | TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
 297  | PRIORITY expr { OSPF_PATT->priority = $2 ; if (($2<0) || ($2>255)) cf_error("Priority must be in range 0-255"); }
 298  | STRICT NONBROADCAST bool { OSPF_PATT->strictnbma = $3 ; }
 299  | STUB bool { OSPF_PATT->stub = $2 ; }
 300  | CHECK LINK bool { OSPF_PATT->check_link = $3; }
 301  | ECMP WEIGHT expr { OSPF_PATT->ecmp_weight = $3 - 1; if (($3<1) || ($3>256)) cf_error("ECMP weight must be in range 1-256"); }
 302  | NEIGHBORS '{' nbma_list '}'
 303  | AUTHENTICATION NONE { OSPF_PATT->autype = OSPF_AUTH_NONE ; }
 304  | AUTHENTICATION SIMPLE { OSPF_PATT->autype = OSPF_AUTH_SIMPLE ; }
 305  | AUTHENTICATION CRYPTOGRAPHIC { OSPF_PATT->autype = OSPF_AUTH_CRYPT ; }
 306  | RX BUFFER NORMAL { OSPF_PATT->rx_buffer = 0; }
 307  | RX BUFFER LARGE { OSPF_PATT->rx_buffer = OSPF_MAX_PKT_SIZE; }
 308  | RX BUFFER expr { OSPF_PATT->rx_buffer = $3; if (($3 < OSPF_MIN_PKT_SIZE) || ($3 > OSPF_MAX_PKT_SIZE)) cf_error("Buffer size must be in range 256-65535"); }
 309  | TX tos { OSPF_PATT->tx_tos = $2; }
 310  | TX PRIORITY expr { OSPF_PATT->tx_priority = $3; }
 311  | TX LENGTH expr { OSPF_PATT->tx_length = $3; if (($3 < OSPF_MIN_PKT_SIZE) || ($3 > OSPF_MAX_PKT_SIZE)) cf_error("TX length must be in range 256-65535"); }
 312  | TTL SECURITY bool { OSPF_PATT->ttl_security = $3; }
 313  | TTL SECURITY TX ONLY { OSPF_PATT->ttl_security = 2; }
 314  | BFD bool { OSPF_PATT->bfd = $2; cf_check_bfd($2); }
 315  | SECONDARY bool { OSPF_PATT->bsd_secondary = $2; }
 316  | password_list
 317  ;
 318
 319 pref_list:
 320  /* empty */
 321  | pref_list pref_item
 322  ;
 323
 324 pref_item: pref_base pref_opt ';' ;
 325
 326 pref_base: prefix
 327  {
 328    this_pref = cfg_allocz(sizeof(struct area_net_config));
 329    add_tail(this_nets, NODE this_pref);
 330    this_pref->px.addr = $1.addr;
 331    this_pref->px.len = $1.len;
 332  }
 333 ;
 334
 335 pref_opt:
 336  /* empty */
 337  | HIDDEN { this_pref->hidden = 1; }
 338  | TAG expr { this_pref->tag = $2; }
 339  ;
 340
 341 nbma_list:
 342  /* empty */
 343  | nbma_list nbma_item
 344  ;
 345
 346 nbma_eligible:
 347  /* empty */ { $$ = 0; }
 348  | ELIGIBLE { $$ = 1; }
 349  ;
 350
 351 nbma_item: IPA nbma_eligible ';'
 352  {
 353    this_nbma = cfg_allocz(sizeof(struct nbma_node));
 354    add_tail(&OSPF_PATT->nbma_list, NODE this_nbma);
 355    this_nbma->ip=$1;
 356    this_nbma->eligible=$2;
 357  }
 358 ;
 359
 360 ospf_iface_start:
 361  {
 362   this_ipatt = cfg_allocz(sizeof(struct ospf_iface_patt));
 363   add_tail(&this_area->patt_list, NODE this_ipatt);
 364   init_list(&this_ipatt->ipn_list);
 365   OSPF_PATT->cost = COST_D;
 366   OSPF_PATT->helloint = HELLOINT_D;
 367   OSPF_PATT->pollint = POLLINT_D;
 368   OSPF_PATT->rxmtint = RXMTINT_D;
 369   OSPF_PATT->inftransdelay = INFTRANSDELAY_D;
 370   OSPF_PATT->priority = PRIORITY_D;
 371   OSPF_PATT->waitint = WAIT_DMH*HELLOINT_D;
 372   OSPF_PATT->deadc = DEADC_D;
 373   OSPF_PATT->deadint = 0;
 374   OSPF_PATT->type = OSPF_IT_UNDEF;
 375   init_list(&OSPF_PATT->nbma_list);
 376   OSPF_PATT->autype = OSPF_AUTH_NONE;
 377   OSPF_PATT->ptp_netmask = 2; /* not specified */
 378   OSPF_PATT->tx_tos = IP_PREC_INTERNET_CONTROL;
 379   OSPF_PATT->tx_priority = sk_priority_control;
 380   reset_passwords();
 381  }
 382 ;
 383
 384 ospf_instance_id:
 385    /* empty */
 386  | INSTANCE expr { set_instance_id($2); }
 387  ;
 388
 389 ospf_iface_opts:
 390    /* empty */
 391  | ospf_iface_opts ospf_iface_item ';'
 392  ;
 393
 394 ospf_iface_opt_list:
 395    /* empty */
 396  | '{' ospf_iface_opts '}'
 397  ;
 398
 399 ospf_iface:
 400   ospf_iface_start iface_patt_list ospf_instance_id ospf_iface_opt_list { ospf_iface_finish(); }
 401  ;
 402
 403 opttext:
 404     TEXT
 405  | /* empty */ { $$ = NULL; }
 406  ;
 407
 408 CF_ADDTO(dynamic_attr, OSPF_METRIC1 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC1); })
 409 CF_ADDTO(dynamic_attr, OSPF_METRIC2 { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_METRIC2); })
 410 CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_OSPF_TAG); })
 411 CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID | EAF_TEMP, T_QUAD, EA_OSPF_ROUTER_ID); })
 412
 413 CF_CLI_HELP(SHOW OSPF, ..., [[Show information about OSPF protocol]]);
 414 CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol XXX]])
 415 { ospf_sh(proto_get_named($3, &proto_ospf)); };
 416
 417 CF_CLI(SHOW OSPF NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about OSPF neighbors]])
 418 { ospf_sh_neigh(proto_get_named($4, &proto_ospf), $5); };
 419
 420 CF_CLI(SHOW OSPF INTERFACE, optsym opttext, [<name>] [\"<interface>\"], [[Show information about interface]])
 421 { ospf_sh_iface(proto_get_named($4, &proto_ospf), $5); };
 422
 423 CF_CLI_HELP(SHOW OSPF TOPOLOGY, [all] [<name>], [[Show information about OSPF network topology]])
 424
 425 CF_CLI(SHOW OSPF TOPOLOGY, optsym opttext, [<name>], [[Show information about reachable OSPF network topology]])
 426 { ospf_sh_state(proto_get_named($4, &proto_ospf), 0, 1); };
 427
 428 CF_CLI(SHOW OSPF TOPOLOGY ALL, optsym opttext, [<name>], [[Show information about all OSPF network topology]])
 429 { ospf_sh_state(proto_get_named($5, &proto_ospf), 0, 0); };
 430
 431 CF_CLI_HELP(SHOW OSPF STATE, [all] [<name>], [[Show information about OSPF network state]])
 432
 433 CF_CLI(SHOW OSPF STATE, optsym opttext, [<name>], [[Show information about reachable OSPF network state]])
 434 { ospf_sh_state(proto_get_named($4, &proto_ospf), 1, 1); };
 435
 436 CF_CLI(SHOW OSPF STATE ALL, optsym opttext, [<name>], [[Show information about all OSPF network state]])
 437 { ospf_sh_state(proto_get_named($5, &proto_ospf), 1, 0); };
 438
 439 CF_CLI_HELP(SHOW OSPF LSADB, ..., [[Show content of OSPF LSA database]]);
 440 CF_CLI(SHOW OSPF LSADB, lsadb_args, [global | area <id> | link] [type <num>] [lsid <id>] [self | router <id>] [<proto>], [[Show content of OSPF LSA database]])
 441 { ospf_sh_lsadb($4); };
 442
 443 lsadb_args:
 444    /* empty */ {
 445      $$ = cfg_allocz(sizeof(struct lsadb_show_data));
 446    }
 447  | lsadb_args GLOBAL { $$ = $1; $$->scope = LSA_SCOPE_AS; }
 448  | lsadb_args AREA idval { $$ = $1; $$->scope = LSA_SCOPE_AREA; $$->area = $3; }
 449  | lsadb_args LINK { $$ = $1; $$->scope = 1; /* hack, 0 is no filter */ }
 450  | lsadb_args TYPE NUM { $$ = $1; $$->type = $3; }
 451  | lsadb_args LSID idval { $$ = $1; $$->lsid = $3; }
 452  | lsadb_args SELF { $$ = $1; $$->router = SH_ROUTER_SELF; }
 453  | lsadb_args ROUTER idval { $$ = $1; $$->router = $3; }
 454  | lsadb_args SYM { $$ = $1; $$->name = $2; }
 455  ;
 456
 457 CF_CODE
 458
 459 CF_END