isisd/isis_lsp.h

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_lsp.h
   3  *                             LSP processing
   4  *
   5  * Copyright (C) 2001,2002   Sampo Saaristo
   6  *                           Tampere University of Technology
   7  *                           Institute of Communications Engineering
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public Licenseas published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #ifndef _ZEBRA_ISIS_LSP_H
  25 #define _ZEBRA_ISIS_LSP_H
  26
  27 /* Structure for isis_lsp, this structure will only support the fixed
  28  * System ID (Currently 6) (atleast for now). In order to support more
  29  * We will have to split the header into two parts, and for readability
  30  * sake it should better be avoided */
  31 struct isis_lsp
  32 {
  33   struct isis_fixed_hdr *isis_header;           /* normally equals pdu */
  34   struct isis_link_state_hdr *lsp_header;       /* pdu + isis_header_len */
  35   struct stream *pdu;                           /* full pdu lsp */
  36   union
  37   {
  38     struct list *frags;
  39     struct isis_lsp *zero_lsp;
  40   } lspu;
  41   u_int32_t auth_tlv_offset;    /* authentication TLV position in the pdu */
  42   u_int32_t SRMflags[ISIS_MAX_CIRCUITS];
  43   u_int32_t SSNflags[ISIS_MAX_CIRCUITS];
  44   int level;                    /* L1 or L2? */
  45   int scheduled;                /* scheduled for sending */
  46   time_t installed;
  47   time_t last_generated;
  48   int own_lsp;
  49 #ifdef TOPOLOGY_GENERATE
  50   int from_topology;
  51   struct thread *t_lsp_top_ref;
  52 #endif
  53   /* used for 60 second counting when rem_lifetime is zero */
  54   int age_out;
  55   struct isis_area *area;
  56   struct tlvs tlv_data;         /* Simplifies TLV access */
  57 };
  58
  59 dict_t *lsp_db_init (void);
  60 void lsp_db_destroy (dict_t * lspdb);
  61 int lsp_tick (struct thread *thread);
  62
  63 int lsp_generate (struct isis_area *area, int level);
  64 int lsp_regenerate_schedule (struct isis_area *area, int level,
  65                              int all_pseudo);
  66 int lsp_generate_pseudo (struct isis_circuit *circuit, int level);
  67 int lsp_regenerate_schedule_pseudo (struct isis_circuit *circuit, int level);
  68
  69 struct isis_lsp *lsp_new (struct isis_area *area, u_char * lsp_id,
  70                           u_int16_t rem_lifetime,
  71                           u_int32_t seq_num, u_int8_t lsp_bits,
  72                           u_int16_t checksum, int level);
  73 struct isis_lsp *lsp_new_from_stream_ptr (struct stream *stream,
  74                                           u_int16_t pdu_len,
  75                                           struct isis_lsp *lsp0,
  76                                           struct isis_area *area,
  77                                           int level);
  78 void lsp_insert (struct isis_lsp *lsp, dict_t * lspdb);
  79 struct isis_lsp *lsp_search (u_char * id, dict_t * lspdb);
  80
  81 void lsp_build_list (u_char * start_id, u_char * stop_id, u_char num_lsps,
  82                      struct list *list, dict_t * lspdb);
  83 void lsp_build_list_nonzero_ht (u_char * start_id, u_char * stop_id,
  84                                 struct list *list, dict_t * lspdb);
  85 void lsp_build_list_ssn (struct isis_circuit *circuit, u_char num_lsps,
  86                          struct list *list, dict_t * lspdb);
  87
  88 void lsp_search_and_destroy (u_char * id, dict_t * lspdb);
  89 void lsp_purge_pseudo (u_char * id, struct isis_circuit *circuit, int level);
  90 void lsp_purge_non_exist (int level,
  91                           struct isis_link_state_hdr *lsp_hdr,
  92                           struct isis_area *area);
  93
  94 #define LSP_EQUAL 1
  95 #define LSP_NEWER 2
  96 #define LSP_OLDER 3
  97
  98 #define LSP_PSEUDO_ID(I) ((I)[ISIS_SYS_ID_LEN])
  99 #define LSP_FRAGMENT(I) ((I)[ISIS_SYS_ID_LEN + 1])
 100 #define OWNLSPID(I) \
 101         memcpy ((I), isis->sysid, ISIS_SYS_ID_LEN);\
 102         (I)[ISIS_SYS_ID_LEN] = 0;\
 103         (I)[ISIS_SYS_ID_LEN + 1] = 0
 104 int lsp_id_cmp (u_char * id1, u_char * id2);
 105 int lsp_compare (char *areatag, struct isis_lsp *lsp, u_int32_t seq_num,
 106                  u_int16_t checksum, u_int16_t rem_lifetime);
 107 void lsp_update (struct isis_lsp *lsp, struct stream *stream,
 108                  struct isis_area *area, int level);
 109 void lsp_inc_seqnum (struct isis_lsp *lsp, u_int32_t seq_num);
 110 void lsp_print (struct isis_lsp *lsp, struct vty *vty, char dynhost);
 111 void lsp_print_detail (struct isis_lsp *lsp, struct vty *vty, char dynhost);
 112 int lsp_print_all (struct vty *vty, dict_t * lspdb, char detail,
 113                    char dynhost);
 114 const char *lsp_bits2string (u_char *);
 115
 116 /* sets SRMflags for all active circuits of an lsp */
 117 void lsp_set_all_srmflags (struct isis_lsp *lsp);
 118
 119 #ifdef TOPOLOGY_GENERATE
 120 void generate_topology_lsps (struct isis_area *area);
 121 void remove_topology_lsps (struct isis_area *area);
 122 void build_topology_lsp_data (struct isis_lsp *lsp,
 123                               struct isis_area *area, int lsp_top_num);
 124 #endif /* TOPOLOGY_GENERATE */
 125
 126 #endif /* ISIS_LSP */