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/* TOS field normaly null */
30#define DEFAULT_TOS_VALUE      0x0
31
32#define ALLSPFROUTERS6 "ff02::5"
33#define ALLDROUTERS6   "ff02::6"
34
35#define OSPF6_ROUTER_BIT_W     (1 << 3)
36#define OSPF6_ROUTER_BIT_V     (1 << 2)
37#define OSPF6_ROUTER_BIT_E     (1 << 1)
38#define OSPF6_ROUTER_BIT_B     (1 << 0)
39
40/* OSPF options */
41/* present in HELLO, DD, LSA */
42#define OSPF6_OPT_SET(x,opt)   ((x)[2] |=  (opt))
43#define OSPF6_OPT_ISSET(x,opt) ((x)[2] &   (opt))
44#define OSPF6_OPT_CLEAR(x,opt) ((x)[2] &= ~(opt))
45#define OSPF6_OPT_CLEAR_ALL(x) ((x)[0] = (x)[1] = (x)[2] = 0)
46
47#define OSPF6_OPT_DC (1 << 5)   /* Demand Circuit handling Capability */
48#define OSPF6_OPT_R  (1 << 4)   /* Forwarding Capability (Any Protocol) */
49#define OSPF6_OPT_N  (1 << 3)   /* Handling Type-7 LSA Capability */
50#define OSPF6_OPT_MC (1 << 2)   /* Multicasting Capability */
51#define OSPF6_OPT_E  (1 << 1)   /* AS External Capability */
52#define OSPF6_OPT_V6 (1 << 0)   /* IPv6 forwarding Capability */
53
54/* OSPF6 Prefix */
55#define OSPF6_PREFIX_MIN_SIZE                  4U /* .length == 0 */
56struct ospf6_prefix
57{
58  u_int8_t prefix_length;
59  u_int8_t prefix_options;
60  union {
61    u_int16_t _prefix_metric;
62    u_int16_t _prefix_referenced_lstype;
63  } u;
64#define prefix_metric        u._prefix_metric
65#define prefix_refer_lstype  u._prefix_referenced_lstype
66  /* followed by one address_prefix */
67};
68
69#define OSPF6_PREFIX_OPTION_NU (1 << 0)  /* No Unicast */
70#define OSPF6_PREFIX_OPTION_LA (1 << 1)  /* Local Address */
71#define OSPF6_PREFIX_OPTION_MC (1 << 2)  /* MultiCast */
72#define OSPF6_PREFIX_OPTION_P  (1 << 3)  /* Propagate (NSSA) */
73
74/* caddr_t OSPF6_PREFIX_BODY (struct ospf6_prefix *); */
75#define OSPF6_PREFIX_BODY(x) ((caddr_t)(x) + sizeof (struct ospf6_prefix))
76
77/* size_t OSPF6_PREFIX_SPACE (int prefixlength); */
78#define OSPF6_PREFIX_SPACE(x) ((((x) + 31) / 32) * 4)
79
80/* size_t OSPF6_PREFIX_SIZE (struct ospf6_prefix *); */
81#define OSPF6_PREFIX_SIZE(x) \
82   (OSPF6_PREFIX_SPACE ((x)->prefix_length) + sizeof (struct ospf6_prefix))
83
84/* struct ospf6_prefix *OSPF6_PREFIX_NEXT (struct ospf6_prefix *); */
85#define OSPF6_PREFIX_NEXT(x) \
86   ((struct ospf6_prefix *)((caddr_t)(x) + OSPF6_PREFIX_SIZE (x)))
87
88#define ospf6_prefix_in6_addr(in6, op)                         \
89do {                                                           \
90  memset (in6, 0, sizeof (struct in6_addr));                   \
91  memcpy (in6, (caddr_t) (op) + sizeof (struct ospf6_prefix),  \
92          OSPF6_PREFIX_SPACE ((op)->prefix_length));           \
93} while (0)
94
95extern void ospf6_prefix_apply_mask (struct ospf6_prefix *op);
96extern void ospf6_prefix_options_printbuf (u_int8_t prefix_options,
97                                           char *buf, int size);
98extern void ospf6_capability_printbuf (char capability, char *buf, int size);
99extern void ospf6_options_printbuf (u_char *options, char *buf, int size);
100
101#endif /* OSPF6_PROTO_H */
102