ospf6d/ospf6_lsa.h

   1 /*
   2  * Copyright (C) 2003 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #ifndef OSPF6_LSA_H
  23 #define OSPF6_LSA_H
  24
  25 /* Debug option */
  26 #define OSPF6_LSA_DEBUG           0x01
  27 #define OSPF6_LSA_DEBUG_ORIGINATE 0x02
  28 #define OSPF6_LSA_DEBUG_EXAMIN    0x04
  29 #define OSPF6_LSA_DEBUG_FLOOD     0x08
  30
  31 #define IS_OSPF6_DEBUG_LSA(name)                        \
  32   (ospf6_lstype_debug (htons (OSPF6_LSTYPE_ ## name)) & \
  33    OSPF6_LSA_DEBUG)
  34 #define IS_OSPF6_DEBUG_ORIGINATE(name)                  \
  35   (ospf6_lstype_debug (htons (OSPF6_LSTYPE_ ## name)) & \
  36    OSPF6_LSA_DEBUG_ORIGINATE)
  37 #define IS_OSPF6_DEBUG_EXAMIN(name)                     \
  38   (ospf6_lstype_debug (htons (OSPF6_LSTYPE_ ## name)) & \
  39    OSPF6_LSA_DEBUG_EXAMIN)
  40 #define IS_OSPF6_DEBUG_LSA_TYPE(type) \
  41   (ospf6_lstype_debug (type) & OSPF6_LSA_DEBUG)
  42 #define IS_OSPF6_DEBUG_ORIGINATE_TYPE(type) \
  43   (ospf6_lstype_debug (type) & OSPF6_LSA_DEBUG_ORIGINATE)
  44 #define IS_OSPF6_DEBUG_EXAMIN_TYPE(type) \
  45   (ospf6_lstype_debug (type) & OSPF6_LSA_DEBUG_EXAMIN)
  46 #define IS_OSPF6_DEBUG_FLOOD_TYPE(type) \
  47   (ospf6_lstype_debug (type) & OSPF6_LSA_DEBUG_FLOOD)
  48
  49 /* LSA definition */
  50
  51 #define OSPF6_MAX_LSASIZE      4096
  52
  53 /* Type */
  54 #define OSPF6_LSTYPE_UNKNOWN          0x0000
  55 #define OSPF6_LSTYPE_ROUTER           0x2001
  56 #define OSPF6_LSTYPE_NETWORK          0x2002
  57 #define OSPF6_LSTYPE_INTER_PREFIX     0x2003
  58 #define OSPF6_LSTYPE_INTER_ROUTER     0x2004
  59 #define OSPF6_LSTYPE_AS_EXTERNAL      0x4005
  60 #define OSPF6_LSTYPE_GROUP_MEMBERSHIP 0x2006
  61 #define OSPF6_LSTYPE_TYPE_7           0x2007
  62 #define OSPF6_LSTYPE_LINK             0x0008
  63 #define OSPF6_LSTYPE_INTRA_PREFIX     0x2009
  64 #define OSPF6_LSTYPE_SIZE             0x000a
  65
  66 /* Masks for LS Type : RFC 2740 A.4.2.1 "LS type" */
  67 #define OSPF6_LSTYPE_UBIT_MASK        0x8000
  68 #define OSPF6_LSTYPE_SCOPE_MASK       0x6000
  69 #define OSPF6_LSTYPE_FCODE_MASK       0x1fff
  70
  71 /* LSA scope */
  72 #define OSPF6_SCOPE_LINKLOCAL  0x0000
  73 #define OSPF6_SCOPE_AREA       0x2000
  74 #define OSPF6_SCOPE_AS         0x4000
  75 #define OSPF6_SCOPE_RESERVED   0x6000
  76
  77 /* XXX U-bit handling should be treated here */
  78 #define OSPF6_LSA_SCOPE(type) \
  79   (ntohs (type) & OSPF6_LSTYPE_SCOPE_MASK)
  80
  81 /* LSA Header */
  82 #define OSPF6_LSA_HEADER_SIZE                 20U
  83 struct ospf6_lsa_header
  84 {
  85   u_int16_t age;        /* LS age */
  86   u_int16_t type;       /* LS type */
  87   u_int32_t id;         /* Link State ID */
  88   u_int32_t adv_router; /* Advertising Router */
  89   u_int32_t seqnum;     /* LS sequence number */
  90   u_int16_t checksum;   /* LS checksum */
  91   u_int16_t length;     /* LSA length */
  92 };
  93
  94 #define OSPF6_LSA_HEADER_END(h) \
  95   ((caddr_t)(h) + sizeof (struct ospf6_lsa_header))
  96 #define OSPF6_LSA_SIZE(h) \
  97   (ntohs (((struct ospf6_lsa_header *) (h))->length))
  98 #define OSPF6_LSA_END(h) \
  99   ((caddr_t)(h) + ntohs (((struct ospf6_lsa_header *) (h))->length))
 100 #define OSPF6_LSA_IS_TYPE(t, L) \
 101   ((L)->header->type == htons (OSPF6_LSTYPE_ ## t) ? 1 : 0)
 102 #define OSPF6_LSA_IS_SAME(L1, L2) \
 103   ((L1)->header->adv_router == (L2)->header->adv_router && \
 104    (L1)->header->id == (L2)->header->id && \
 105    (L1)->header->type == (L2)->header->type)
 106 #define OSPF6_LSA_IS_MATCH(t, i, a, L) \
 107   ((L)->header->adv_router == (a) && (L)->header->id == (i) && \
 108    (L)->header->type == (t))
 109 #define OSPF6_LSA_IS_DIFFER(L1, L2)  ospf6_lsa_is_differ (L1, L2)
 110 #define OSPF6_LSA_IS_MAXAGE(L) (ospf6_lsa_age_current (L) == OSPF_LSA_MAXAGE)
 111 #define OSPF6_LSA_IS_CHANGED(L1, L2) ospf6_lsa_is_changed (L1, L2)
 112 #define OSPF6_LSA_IS_SEQWRAP(L) ((L)->header->seqnum == htonl(OSPF_MAX_SEQUENCE_NUMBER + 1))
 113
 114
 115 struct ospf6_lsa
 116 {
 117   char              name[64];   /* dump string */
 118
 119   struct route_node *rn;
 120
 121   unsigned char     lock;           /* reference counter */
 122   unsigned char     flag;           /* special meaning (e.g. floodback) */
 123
 124   struct timeval    birth;          /* tv_sec when LS age 0 */
 125   struct timeval    originated;     /* used by MinLSInterval check */
 126   struct timeval    received;       /* used by MinLSArrival check */
 127   struct timeval    installed;
 128
 129   struct thread    *expire;
 130   struct thread    *refresh;        /* For self-originated LSA */
 131
 132   int               retrans_count;
 133
 134   struct ospf6_lsdb *lsdb;
 135
 136   /* lsa instance */
 137   struct ospf6_lsa_header *header;
 138 };
 139
 140 #define OSPF6_LSA_HEADERONLY 0x01
 141 #define OSPF6_LSA_FLOODBACK  0x02
 142 #define OSPF6_LSA_DUPLICATE  0x04
 143 #define OSPF6_LSA_IMPLIEDACK 0x08
 144 #define OSPF6_LSA_UNAPPROVED 0x10
 145 #define OSPF6_LSA_SEQWRAPPED 0x20
 146
 147 struct ospf6_lsa_handler
 148 {
 149   u_int16_t type; /* host byte order */
 150   const char *name;
 151   const char *short_name;
 152   int (*show) (struct vty *, struct ospf6_lsa *);
 153   char *(*get_prefix_str) (struct ospf6_lsa *, char *buf, int buflen, int pos);
 154   u_char debug;
 155 };
 156
 157 extern struct ospf6_lsa_handler unknown_handler;
 158 #define OSPF6_LSA_IS_KNOWN(type) \
 159   (ospf6_get_lsa_handler (type) != &unknown_handler ? 1 : 0)
 160
 161 extern vector ospf6_lsa_handler_vector;
 162
 163 /* Macro for LSA Origination */
 164 /* addr is (struct prefix *) */
 165 #define CONTINUE_IF_ADDRESS_LINKLOCAL(debug,addr)      \
 166   if (IN6_IS_ADDR_LINKLOCAL (&(addr)->u.prefix6))      \
 167     {                                                  \
 168       char buf[64];                                    \
 169       prefix2str (addr, buf, sizeof (buf));            \
 170       if (debug)                                       \
 171         zlog_debug ("Filter out Linklocal: %s", buf);  \
 172       continue;                                        \
 173     }
 174
 175 #define CONTINUE_IF_ADDRESS_UNSPECIFIED(debug,addr)    \
 176   if (IN6_IS_ADDR_UNSPECIFIED (&(addr)->u.prefix6))    \
 177     {                                                  \
 178       char buf[64];                                    \
 179       prefix2str (addr, buf, sizeof (buf));            \
 180       if (debug)                                       \
 181         zlog_debug ("Filter out Unspecified: %s", buf);\
 182       continue;                                        \
 183     }
 184
 185 #define CONTINUE_IF_ADDRESS_LOOPBACK(debug,addr)       \
 186   if (IN6_IS_ADDR_LOOPBACK (&(addr)->u.prefix6))       \
 187     {                                                  \
 188       char buf[64];                                    \
 189       prefix2str (addr, buf, sizeof (buf));            \
 190       if (debug)                                       \
 191         zlog_debug ("Filter out Loopback: %s", buf);   \
 192       continue;                                        \
 193     }
 194
 195 #define CONTINUE_IF_ADDRESS_V4COMPAT(debug,addr)       \
 196   if (IN6_IS_ADDR_V4COMPAT (&(addr)->u.prefix6))       \
 197     {                                                  \
 198       char buf[64];                                    \
 199       prefix2str (addr, buf, sizeof (buf));            \
 200       if (debug)                                       \
 201         zlog_debug ("Filter out V4Compat: %s", buf);   \
 202       continue;                                        \
 203     }
 204
 205 #define CONTINUE_IF_ADDRESS_V4MAPPED(debug,addr)       \
 206   if (IN6_IS_ADDR_V4MAPPED (&(addr)->u.prefix6))       \
 207     {                                                  \
 208       char buf[64];                                    \
 209       prefix2str (addr, buf, sizeof (buf));            \
 210       if (debug)                                       \
 211         zlog_debug ("Filter out V4Mapped: %s", buf);   \
 212       continue;                                        \
 213     }
 214
 215
 216 /* Function Prototypes */
 217 extern const char *ospf6_lstype_name (u_int16_t type);
 218 extern const char *ospf6_lstype_short_name (u_int16_t type);
 219 extern u_char ospf6_lstype_debug (u_int16_t type);
 220 extern int ospf6_lsa_is_differ (struct ospf6_lsa *lsa1, struct ospf6_lsa *lsa2);
 221 extern int ospf6_lsa_is_changed (struct ospf6_lsa *lsa1, struct ospf6_lsa *lsa2);
 222 extern u_int16_t ospf6_lsa_age_current (struct ospf6_lsa *);
 223 extern void ospf6_lsa_age_update_to_send (struct ospf6_lsa *, u_int32_t);
 224 extern void ospf6_lsa_premature_aging (struct ospf6_lsa *);
 225 extern int ospf6_lsa_compare (struct ospf6_lsa *, struct ospf6_lsa *);
 226
 227 extern char *ospf6_lsa_printbuf (struct ospf6_lsa *lsa, char *buf, int size);
 228 extern void ospf6_lsa_header_print_raw (struct ospf6_lsa_header *header);
 229 extern void ospf6_lsa_header_print (struct ospf6_lsa *lsa);
 230 extern void ospf6_lsa_show_summary_header (struct vty *vty);
 231 extern void ospf6_lsa_show_summary (struct vty *vty, struct ospf6_lsa *lsa);
 232 extern void ospf6_lsa_show_dump (struct vty *vty, struct ospf6_lsa *lsa);
 233 extern void ospf6_lsa_show_internal (struct vty *vty, struct ospf6_lsa *lsa);
 234 extern void ospf6_lsa_show (struct vty *vty, struct ospf6_lsa *lsa);
 235
 236 extern struct ospf6_lsa *ospf6_lsa_create (struct ospf6_lsa_header *header);
 237 extern struct ospf6_lsa *ospf6_lsa_create_headeronly (struct ospf6_lsa_header *header);
 238 extern void ospf6_lsa_delete (struct ospf6_lsa *lsa);
 239 extern struct ospf6_lsa *ospf6_lsa_copy (struct ospf6_lsa *);
 240
 241 extern void ospf6_lsa_lock (struct ospf6_lsa *);
 242 extern void ospf6_lsa_unlock (struct ospf6_lsa *);
 243
 244 extern int ospf6_lsa_expire (struct thread *);
 245 extern int ospf6_lsa_refresh (struct thread *);
 246
 247 extern unsigned short ospf6_lsa_checksum (struct ospf6_lsa_header *);
 248 extern int ospf6_lsa_checksum_valid (struct ospf6_lsa_header *);
 249 extern int ospf6_lsa_prohibited_duration (u_int16_t type, u_int32_t id,
 250                                           u_int32_t adv_router, void *scope);
 251
 252 extern void ospf6_install_lsa_handler (struct ospf6_lsa_handler *handler);
 253 extern struct ospf6_lsa_handler *ospf6_get_lsa_handler (u_int16_t type);
 254
 255 extern void ospf6_lsa_init (void);
 256 extern void ospf6_lsa_terminate (void);
 257
 258 extern int config_write_ospf6_debug_lsa (struct vty *vty);
 259 extern void install_element_ospf6_debug_lsa (void);
 260
 261 #endif /* OSPF6_LSA_H */
 262