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    1: /*
    2:  * Common protocol data and data structures.
    3:  * Copyright (C) 2003 Yasuhiro Ohara
    4:  *
    5:  * This file is part of GNU Zebra.
    6:  *
    7:  * GNU Zebra is free software; you can redistribute it and/or modify it
    8:  * under the terms of the GNU General Public License as published by the
    9:  * Free Software Foundation; either version 2, or (at your option) any
   10:  * later version.
   11:  *
   12:  * GNU Zebra is distributed in the hope that it will be useful, but
   13:  * WITHOUT ANY WARRANTY; without even the implied warranty of
   14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   15:  * General Public License for more details.
   16:  *
   17:  * You should have received a copy of the GNU General Public License
   18:  * along with GNU Zebra; see the file COPYING.  If not, write to the 
   19:  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
   20:  * Boston, MA 02111-1307, USA.  
   21:  */
   22: 
   23: #ifndef OSPF6_PROTO_H
   24: #define OSPF6_PROTO_H
   25: 
   26: /* OSPF protocol version */
   27: #define OSPFV3_VERSION           3
   28: 
   29: /* OSPF protocol number. */
   30: #ifndef IPPROTO_OSPFIGP
   31: #define IPPROTO_OSPFIGP         89
   32: #endif
   33: 
   34: /* TOS field normaly null */
   35: #define DEFAULT_TOS_VALUE      0x0
   36: 
   37: /* Architectural Constants */
   38: #define LS_REFRESH_TIME                1800  /* 30 min */
   39: #define MIN_LS_INTERVAL                   5
   40: #define MIN_LS_ARRIVAL                    1
   41: #define MAXAGE                         3600  /* 1 hour */
   42: #define CHECK_AGE                       300  /* 5 min */
   43: #define MAX_AGE_DIFF                    900  /* 15 min */
   44: #define LS_INFINITY                0xffffff  /* 24-bit binary value */
   45: #define INITIAL_SEQUENCE_NUMBER  0x80000001  /* signed 32-bit integer */
   46: #define MAX_SEQUENCE_NUMBER      0x7fffffff  /* signed 32-bit integer */
   47: 
   48: #define ALLSPFROUTERS6 "ff02::5"
   49: #define ALLDROUTERS6   "ff02::6"
   50: 
   51: /* Configurable Constants */
   52: 
   53: #define DEFAULT_HELLO_INTERVAL       10
   54: #define DEFAULT_ROUTER_DEAD_INTERVAL 40
   55: 
   56: #define OSPF6_ROUTER_BIT_W     (1 << 3)
   57: #define OSPF6_ROUTER_BIT_V     (1 << 2)
   58: #define OSPF6_ROUTER_BIT_E     (1 << 1)
   59: #define OSPF6_ROUTER_BIT_B     (1 << 0)
   60: 
   61: /* OSPF options */
   62: /* present in HELLO, DD, LSA */
   63: #define OSPF6_OPT_SET(x,opt)   ((x)[2] |=  (opt))
   64: #define OSPF6_OPT_ISSET(x,opt) ((x)[2] &   (opt))
   65: #define OSPF6_OPT_CLEAR(x,opt) ((x)[2] &= ~(opt))
   66: #define OSPF6_OPT_CLEAR_ALL(x) ((x)[0] = (x)[1] = (x)[2] = 0)
   67: 
   68: #define OSPF6_OPT_DC (1 << 5)   /* Demand Circuit handling Capability */
   69: #define OSPF6_OPT_R  (1 << 4)   /* Forwarding Capability (Any Protocol) */
   70: #define OSPF6_OPT_N  (1 << 3)   /* Handling Type-7 LSA Capability */
   71: #define OSPF6_OPT_MC (1 << 2)   /* Multicasting Capability */
   72: #define OSPF6_OPT_E  (1 << 1)   /* AS External Capability */
   73: #define OSPF6_OPT_V6 (1 << 0)   /* IPv6 forwarding Capability */
   74: 
   75: /* OSPF6 Prefix */
   76: #define OSPF6_PREFIX_MIN_SIZE                  4U /* .length == 0 */
   77: struct ospf6_prefix
   78: {
   79:   u_int8_t prefix_length;
   80:   u_int8_t prefix_options;
   81:   union {
   82:     u_int16_t _prefix_metric;
   83:     u_int16_t _prefix_referenced_lstype;
   84:   } u;
   85: #define prefix_metric        u._prefix_metric
   86: #define prefix_refer_lstype  u._prefix_referenced_lstype
   87:   /* followed by one address_prefix */
   88: };
   89: 
   90: #define OSPF6_PREFIX_OPTION_NU (1 << 0)  /* No Unicast */
   91: #define OSPF6_PREFIX_OPTION_LA (1 << 1)  /* Local Address */
   92: #define OSPF6_PREFIX_OPTION_MC (1 << 2)  /* MultiCast */
   93: #define OSPF6_PREFIX_OPTION_P  (1 << 3)  /* Propagate (NSSA) */
   94: 
   95: /* caddr_t OSPF6_PREFIX_BODY (struct ospf6_prefix *); */
   96: #define OSPF6_PREFIX_BODY(x) ((caddr_t)(x) + sizeof (struct ospf6_prefix))
   97: 
   98: /* size_t OSPF6_PREFIX_SPACE (int prefixlength); */
   99: #define OSPF6_PREFIX_SPACE(x) ((((x) + 31) / 32) * 4)
  100: 
  101: /* size_t OSPF6_PREFIX_SIZE (struct ospf6_prefix *); */
  102: #define OSPF6_PREFIX_SIZE(x) \
  103:    (OSPF6_PREFIX_SPACE ((x)->prefix_length) + sizeof (struct ospf6_prefix))
  104: 
  105: /* struct ospf6_prefix *OSPF6_PREFIX_NEXT (struct ospf6_prefix *); */
  106: #define OSPF6_PREFIX_NEXT(x) \
  107:    ((struct ospf6_prefix *)((caddr_t)(x) + OSPF6_PREFIX_SIZE (x)))
  108: 
  109: #define ospf6_prefix_in6_addr(in6, op)                         \
  110: do {                                                           \
  111:   memset (in6, 0, sizeof (struct in6_addr));                   \
  112:   memcpy (in6, (caddr_t) (op) + sizeof (struct ospf6_prefix),  \
  113:           OSPF6_PREFIX_SPACE ((op)->prefix_length));           \
  114: } while (0)
  115: 
  116: extern void ospf6_prefix_apply_mask (struct ospf6_prefix *op);
  117: extern void ospf6_prefix_options_printbuf (u_int8_t prefix_options,
  118:                                            char *buf, int size);
  119: extern void ospf6_capability_printbuf (char capability, char *buf, int size);
  120: extern void ospf6_options_printbuf (u_char *options, char *buf, int size);
  121: 
  122: #endif /* OSPF6_PROTO_H */