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 #define OSPF6_ROUTER_BIT_NT    (1 << 4)
  39
  40
  41 /* OSPF options */
  42 /* present in HELLO, DD, LSA */
  43 #define OSPF6_OPT_SET(x, opt) ((x)[2] |= (opt))
  44 #define OSPF6_OPT_ISSET(x, opt) ((x)[2] & (opt))
  45 #define OSPF6_OPT_CLEAR(x, opt) ((x)[2] &= ~(opt))
  46 #define OSPF6_OPT_SET_EXT(x, opt) ((x)[1] |= (opt))
  47 #define OSPF6_OPT_ISSET_EXT(x, opt) ((x)[1] & (opt))
  48 #define OSPF6_OPT_CLEAR_EXT(x, opt) ((x)[1] &= ~(opt))
  49 #define OSPF6_OPT_CLEAR_ALL(x) ((x)[0] = (x)[1] = (x)[2] = 0)
  50
  51 #define OSPF6_OPT_AT (1 << 2) /* Authentication trailer Capability */
  52 #define OSPF6_OPT_L (1 << 1)  /* Link local signalling Capability */
  53 #define OSPF6_OPT_AF (1 << 0) /* Address family Capability */
  54 /* 2 bits reserved for OSPFv2 migrated options */
  55 #define OSPF6_OPT_DC (1 << 5)   /* Demand Circuit handling Capability */
  56 #define OSPF6_OPT_R (1 << 4)    /* Forwarding Capability (Any Protocol) */
  57 #define OSPF6_OPT_N  (1 << 3)   /* Handling Type-7 LSA Capability */
  58 #define OSPF6_OPT_MC (1 << 2)   /* Multicasting Capability */
  59 #define OSPF6_OPT_E  (1 << 1)   /* AS External Capability */
  60 #define OSPF6_OPT_V6 (1 << 0)   /* IPv6 forwarding Capability */
  61
  62 /* OSPF6 Prefix */
  63 #define OSPF6_PREFIX_MIN_SIZE                  4U /* .length == 0 */
  64 struct ospf6_prefix {
  65         uint8_t prefix_length;
  66         uint8_t prefix_options;
  67         union {
  68                 uint16_t _prefix_metric;
  69                 uint16_t _prefix_referenced_lstype;
  70         } u;
  71 #define prefix_metric        u._prefix_metric
  72 #define prefix_refer_lstype  u._prefix_referenced_lstype
  73         /* followed by one address_prefix */
  74         struct in6_addr addr[];
  75 };
  76
  77 #define OSPF6_PREFIX_OPTION_NU (1 << 0)  /* No Unicast */
  78 #define OSPF6_PREFIX_OPTION_LA (1 << 1)  /* Local Address */
  79 #define OSPF6_PREFIX_OPTION_MC (1 << 2)  /* MultiCast */
  80 #define OSPF6_PREFIX_OPTION_P  (1 << 3)  /* Propagate (NSSA) */
  81 #define OSPF6_PREFIX_OPTION_DN                                                 \
  82         (1 << 4) /* DN bit to prevent loops in VPN environment */
  83
  84 /* caddr_t OSPF6_PREFIX_BODY (struct ospf6_prefix *); */
  85 #define OSPF6_PREFIX_BODY(x) ((caddr_t)(x) + sizeof(struct ospf6_prefix))
  86
  87 /* size_t OSPF6_PREFIX_SPACE (int prefixlength); */
  88 #define OSPF6_PREFIX_SPACE(x) ((((x) + 31) / 32) * 4)
  89
  90 /* size_t OSPF6_PREFIX_SIZE (struct ospf6_prefix *); */
  91 #define OSPF6_PREFIX_SIZE(x)                                                   \
  92         (OSPF6_PREFIX_SPACE((x)->prefix_length) + sizeof(struct ospf6_prefix))
  93
  94 /* struct ospf6_prefix *OSPF6_PREFIX_NEXT (struct ospf6_prefix *); */
  95 #define OSPF6_PREFIX_NEXT(x)                                                   \
  96         ((struct ospf6_prefix *)((caddr_t)(x) + OSPF6_PREFIX_SIZE(x)))
  97
  98 extern void ospf6_prefix_in6_addr(struct in6_addr *in6, const void *prefix_buf,
  99                                   const struct ospf6_prefix *p);
 100 extern void ospf6_prefix_apply_mask(struct ospf6_prefix *op);
 101 extern void ospf6_prefix_options_printbuf(uint8_t prefix_options, char *buf,
 102                                           int size);
 103 extern void ospf6_capability_printbuf(char capability, char *buf, int size);
 104 extern void ospf6_options_printbuf(uint8_t *options, char *buf, int size);
 105
 106 #endif /* OSPF6_PROTO_H */