sysdep/unix/krt.Y

   1 /*
   2  *      BIRD -- UNIX Kernel Syncer Configuration
   3  *
   4  *      (c) 1998--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 "sysdep/unix/krt.h"
  12
  13 CF_DEFINES
  14
  15 #define THIS_KRT ((struct krt_config *) this_proto)
  16 #define THIS_KIF ((struct kif_config *) this_proto)
  17 #define KIF_IFACE ((struct kif_iface_config *) this_ipatt)
  18
  19 static void
  20 kif_set_preferred(ip_addr ip)
  21 {
  22   if (ipa_is_ip4(ip))
  23     KIF_IFACE->pref_v4 = ip;
  24   else if (!ipa_is_link_local(ip))
  25     KIF_IFACE->pref_v6 = ip;
  26   else
  27     KIF_IFACE->pref_ll = ip;
  28 }
  29
  30 CF_DECLS
  31
  32 CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, GRACEFUL, RESTART, KRT_SOURCE, KRT_METRIC, MERGE, PATHS)
  33 CF_KEYWORDS(INTERFACE, PREFERRED)
  34
  35 %type <i> kern_mp_limit
  36
  37 CF_GRAMMAR
  38
  39 /* Kernel syncer protocol */
  40
  41 proto: kern_proto '}' ;
  42
  43 kern_proto_start: proto_start KERNEL {
  44      this_proto = krt_init_config($1);
  45 }
  46  ;
  47
  48 kern_proto: kern_proto_start proto_name '{' ;
  49 kern_proto: kern_proto kern_item ';' ;
  50
  51 kern_mp_limit:
  52    /* empty */ { $$ = KRT_DEFAULT_ECMP_LIMIT; }
  53  | LIMIT expr  { $$ = $2; if (($2 <= 0) || ($2 > 255)) cf_error("Merge paths limit must be in range 1-255"); }
  54  ;
  55
  56 kern_item:
  57    proto_item
  58  | proto_channel { this_proto->net_type = $1->net_type; }
  59  | PERSIST bool { THIS_KRT->persist = $2; }
  60  | SCAN TIME expr {
  61       /* Scan time of 0 means scan on startup only */
  62       THIS_KRT->scan_time = $3 S_;
  63    }
  64  | LEARN bool {
  65       THIS_KRT->learn = $2;
  66 #ifndef KRT_ALLOW_LEARN
  67       if ($2)
  68         cf_error("Learning of kernel routes not supported on this platform");
  69 #endif
  70    }
  71  | GRACEFUL RESTART bool { THIS_KRT->graceful_restart = $3; }
  72  | MERGE PATHS bool kern_mp_limit {
  73       THIS_KRT->merge_paths = $3 ? $4 : 0;
  74 #ifndef KRT_ALLOW_MERGE_PATHS
  75       if ($3)
  76         cf_error("Path merging not supported on this platform");
  77 #endif
  78    }
  79  ;
  80
  81 /* Kernel interface protocol */
  82
  83 proto: kif_proto '}' ;
  84
  85 kif_proto_start: proto_start DEVICE { this_proto = kif_init_config($1); }
  86  ;
  87
  88 kif_proto: kif_proto_start proto_name '{' ;
  89 kif_proto: kif_proto kif_item ';' ;
  90
  91 kif_item:
  92    proto_item
  93  | INTERFACE kif_iface
  94  | SCAN TIME expr {
  95       /* Scan time of 0 means scan on startup only */
  96       THIS_KIF->scan_time = $3 S_;
  97    }
  98  ;
  99
 100 kif_iface_start:
 101 {
 102   this_ipatt = cfg_allocz(sizeof(struct kif_iface_config));
 103   add_tail(&THIS_KIF->iface_list, NODE this_ipatt);
 104   init_list(&this_ipatt->ipn_list);
 105 }
 106
 107 kif_iface_item:
 108    PREFERRED ipa { kif_set_preferred($2); }
 109  ;
 110
 111 kif_iface_opts:
 112    /* empty */
 113  | kif_iface_opts kif_iface_item ';'
 114  ;
 115
 116 kif_iface_opt_list:
 117    /* empty */
 118  | '{' kif_iface_opts '}'
 119  ;
 120
 121 kif_iface:
 122   kif_iface_start iface_patt_list_nopx kif_iface_opt_list;
 123
 124
 125 dynamic_attr: KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_KRT_SOURCE); } ;
 126 dynamic_attr: KRT_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_KRT_METRIC); } ;
 127
 128 CF_CODE
 129
 130 CF_END