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; see the file COPYING; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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   /* used for 60 second counting when rem_lifetime is zero */
  50   int age_out;
  51   struct isis_area *area;
  52   struct tlvs tlv_data;         /* Simplifies TLV access */
  53 };
  54
  55 dict_t *lsp_db_init (void);
  56 void lsp_db_destroy (dict_t * lspdb);
  57 int lsp_tick (struct thread *thread);
  58
  59 int lsp_generate (struct isis_area *area, int level);
  60 int lsp_regenerate_schedule (struct isis_area *area, int level,
  61                              int all_pseudo);
  62 int lsp_generate_pseudo (struct isis_circuit *circuit, int level);
  63 int lsp_regenerate_schedule_pseudo (struct isis_circuit *circuit, int level);
  64
  65 struct isis_lsp *lsp_new (struct isis_area *area, u_char * lsp_id,
  66                           u_int16_t rem_lifetime,
  67                           u_int32_t seq_num, u_int8_t lsp_bits,
  68                           u_int16_t checksum, int level);
  69 struct isis_lsp *lsp_new_from_stream_ptr (struct stream *stream,
  70                                           u_int16_t pdu_len,
  71                                           struct isis_lsp *lsp0,
  72                                           struct isis_area *area,
  73                                           int level);
  74 void lsp_insert (struct isis_lsp *lsp, dict_t * lspdb);
  75 struct isis_lsp *lsp_search (u_char * id, dict_t * lspdb);
  76
  77 void lsp_build_list (u_char * start_id, u_char * stop_id, u_char num_lsps,
  78                      struct list *list, dict_t * lspdb);
  79 void lsp_build_list_nonzero_ht (u_char * start_id, u_char * stop_id,
  80                                 struct list *list, dict_t * lspdb);
  81 void lsp_build_list_ssn (struct isis_circuit *circuit, u_char num_lsps,
  82                          struct list *list, dict_t * lspdb);
  83
  84 void lsp_search_and_destroy (u_char * id, dict_t * lspdb);
  85 void lsp_purge_pseudo (u_char * id, struct isis_circuit *circuit, int level);
  86 void lsp_purge_non_exist (int level,
  87                           struct isis_link_state_hdr *lsp_hdr,
  88                           struct isis_area *area);
  89
  90 #define LSP_EQUAL 1
  91 #define LSP_NEWER 2
  92 #define LSP_OLDER 3
  93
  94 #define LSP_PSEUDO_ID(I) ((I)[ISIS_SYS_ID_LEN])
  95 #define LSP_FRAGMENT(I) ((I)[ISIS_SYS_ID_LEN + 1])
  96 #define OWNLSPID(I) \
  97         memcpy ((I), isis->sysid, ISIS_SYS_ID_LEN);\
  98         (I)[ISIS_SYS_ID_LEN] = 0;\
  99         (I)[ISIS_SYS_ID_LEN + 1] = 0
 100 int lsp_id_cmp (u_char * id1, u_char * id2);
 101 int lsp_compare (char *areatag, struct isis_lsp *lsp, u_int32_t seq_num,
 102                  u_int16_t checksum, u_int16_t rem_lifetime);
 103 void lsp_update (struct isis_lsp *lsp, struct stream *stream,
 104                  struct isis_area *area, int level);
 105 void lsp_inc_seqnum (struct isis_lsp *lsp, u_int32_t seq_num);
 106 void lsp_print (struct isis_lsp *lsp, struct vty *vty, char dynhost);
 107 void lsp_print_detail (struct isis_lsp *lsp, struct vty *vty, char dynhost);
 108 int lsp_print_all (struct vty *vty, dict_t * lspdb, char detail,
 109                    char dynhost);
 110 const char *lsp_bits2string (u_char *);
 111
 112 /* sets SRMflags for all active circuits of an lsp */
 113 void lsp_set_all_srmflags (struct isis_lsp *lsp);
 114
 115 #endif /* ISIS_LSP */