ospf6d/ospf6_proto.h

   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 along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef OSPF6_PROTO_H
  23 #define OSPF6_PROTO_H
  24
  25 /* OSPF protocol version */
  26 #define OSPFV3_VERSION           3
  27
  28 /* TOS field normaly null */
  29 #define DEFAULT_TOS_VALUE      0x0
  30
  31 #define ALLSPFROUTERS6 "ff02::5"
  32 #define ALLDROUTERS6   "ff02::6"
  33
  34 #define OSPF6_ROUTER_BIT_W     (1 << 3)
  35 #define OSPF6_ROUTER_BIT_V     (1 << 2)
  36 #define OSPF6_ROUTER_BIT_E     (1 << 1)
  37 #define OSPF6_ROUTER_BIT_B     (1 << 0)
  38
  39 /* OSPF options */
  40 /* present in HELLO, DD, LSA */
  41 #define OSPF6_OPT_SET(x,opt)   ((x)[2] |=  (opt))
  42 #define OSPF6_OPT_ISSET(x,opt) ((x)[2] &   (opt))
  43 #define OSPF6_OPT_CLEAR(x,opt) ((x)[2] &= ~(opt))
  44 #define OSPF6_OPT_CLEAR_ALL(x) ((x)[0] = (x)[1] = (x)[2] = 0)
  45
  46 #define OSPF6_OPT_DC (1 << 5)   /* Demand Circuit handling Capability */
  47 #define OSPF6_OPT_R  (1 << 4)   /* Forwarding Capability (Any Protocol) */
  48 #define OSPF6_OPT_N  (1 << 3)   /* Handling Type-7 LSA Capability */
  49 #define OSPF6_OPT_MC (1 << 2)   /* Multicasting Capability */
  50 #define OSPF6_OPT_E  (1 << 1)   /* AS External Capability */
  51 #define OSPF6_OPT_V6 (1 << 0)   /* IPv6 forwarding Capability */
  52
  53 /* OSPF6 Prefix */
  54 #define OSPF6_PREFIX_MIN_SIZE                  4U /* .length == 0 */
  55 struct ospf6_prefix {
  56         u_int8_t prefix_length;
  57         u_int8_t prefix_options;
  58         union {
  59                 u_int16_t _prefix_metric;
  60                 u_int16_t _prefix_referenced_lstype;
  61         } u;
  62 #define prefix_metric        u._prefix_metric
  63 #define prefix_refer_lstype  u._prefix_referenced_lstype
  64         /* followed by one address_prefix */
  65 };
  66
  67 #define OSPF6_PREFIX_OPTION_NU (1 << 0)  /* No Unicast */
  68 #define OSPF6_PREFIX_OPTION_LA (1 << 1)  /* Local Address */
  69 #define OSPF6_PREFIX_OPTION_MC (1 << 2)  /* MultiCast */
  70 #define OSPF6_PREFIX_OPTION_P  (1 << 3)  /* Propagate (NSSA) */
  71
  72 /* caddr_t OSPF6_PREFIX_BODY (struct ospf6_prefix *); */
  73 #define OSPF6_PREFIX_BODY(x) ((caddr_t)(x) + sizeof (struct ospf6_prefix))
  74
  75 /* size_t OSPF6_PREFIX_SPACE (int prefixlength); */
  76 #define OSPF6_PREFIX_SPACE(x) ((((x) + 31) / 32) * 4)
  77
  78 /* size_t OSPF6_PREFIX_SIZE (struct ospf6_prefix *); */
  79 #define OSPF6_PREFIX_SIZE(x)                                                   \
  80         (OSPF6_PREFIX_SPACE((x)->prefix_length) + sizeof(struct ospf6_prefix))
  81
  82 /* struct ospf6_prefix *OSPF6_PREFIX_NEXT (struct ospf6_prefix *); */
  83 #define OSPF6_PREFIX_NEXT(x)                                                   \
  84         ((struct ospf6_prefix *)((caddr_t)(x) + OSPF6_PREFIX_SIZE(x)))
  85
  86 #define ospf6_prefix_in6_addr(in6, op)                                         \
  87         do {                                                                   \
  88                 memset(in6, 0, sizeof(struct in6_addr));                       \
  89                 memcpy(in6, (caddr_t)(op) + sizeof(struct ospf6_prefix),       \
  90                        OSPF6_PREFIX_SPACE((op)->prefix_length));               \
  91         } while (0)
  92
  93 extern void ospf6_prefix_apply_mask(struct ospf6_prefix *op);
  94 extern void ospf6_prefix_options_printbuf(u_int8_t prefix_options, char *buf,
  95                                           int size);
  96 extern void ospf6_capability_printbuf(char capability, char *buf, int size);
  97 extern void ospf6_options_printbuf(u_char *options, char *buf, int size);
  98
  99 #endif /* OSPF6_PROTO_H */