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    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 (u_char * lsp_id, u_int16_t rem_lifetime,
   70: 			  u_int32_t seq_num, u_int8_t lsp_bits,
   71: 			  u_int16_t checksum, int level);
   72: struct isis_lsp *lsp_new_from_stream_ptr (struct stream *stream,
   73: 					  u_int16_t pdu_len,
   74: 					  struct isis_lsp *lsp0,
   75: 					  struct isis_area *area,
   76:                                           int level);
   77: void lsp_insert (struct isis_lsp *lsp, dict_t * lspdb);
   78: struct isis_lsp *lsp_search (u_char * id, dict_t * lspdb);
   79: 
   80: void lsp_build_list (u_char * start_id, u_char * stop_id, u_char num_lsps,
   81: 		     struct list *list, dict_t * lspdb);
   82: void lsp_build_list_nonzero_ht (u_char * start_id, u_char * stop_id,
   83: 				struct list *list, dict_t * lspdb);
   84: void lsp_build_list_ssn (struct isis_circuit *circuit, u_char num_lsps,
   85:                          struct list *list, dict_t * lspdb);
   86: 
   87: void lsp_search_and_destroy (u_char * id, dict_t * lspdb);
   88: void lsp_purge_pseudo (u_char * id, struct isis_circuit *circuit, int level);
   89: void lsp_purge_non_exist (struct isis_link_state_hdr *lsp_hdr,
   90: 			  struct isis_area *area);
   91: 
   92: #define LSP_EQUAL 1
   93: #define LSP_NEWER 2
   94: #define LSP_OLDER 3
   95: 
   96: #define LSP_PSEUDO_ID(I) ((I)[ISIS_SYS_ID_LEN])
   97: #define LSP_FRAGMENT(I) ((I)[ISIS_SYS_ID_LEN + 1])
   98: #define OWNLSPID(I) \
   99:         memcpy ((I), isis->sysid, ISIS_SYS_ID_LEN);\
  100:         (I)[ISIS_SYS_ID_LEN] = 0;\
  101:         (I)[ISIS_SYS_ID_LEN + 1] = 0
  102: int lsp_id_cmp (u_char * id1, u_char * id2);
  103: int lsp_compare (char *areatag, struct isis_lsp *lsp, u_int32_t seq_num,
  104: 		 u_int16_t checksum, u_int16_t rem_lifetime);
  105: void lsp_update (struct isis_lsp *lsp, struct stream *stream,
  106:                  struct isis_area *area, int level);
  107: void lsp_inc_seqnum (struct isis_lsp *lsp, u_int32_t seq_num);
  108: void lsp_print (struct isis_lsp *lsp, struct vty *vty, char dynhost);
  109: void lsp_print_detail (struct isis_lsp *lsp, struct vty *vty, char dynhost);
  110: int lsp_print_all (struct vty *vty, dict_t * lspdb, char detail,
  111: 		   char dynhost);
  112: const char *lsp_bits2string (u_char *);
  113: 
  114: /* sets SRMflags for all active circuits of an lsp */
  115: void lsp_set_all_srmflags (struct isis_lsp *lsp);
  116: 
  117: #ifdef TOPOLOGY_GENERATE
  118: void generate_topology_lsps (struct isis_area *area);
  119: void remove_topology_lsps (struct isis_area *area);
  120: void build_topology_lsp_data (struct isis_lsp *lsp,
  121: 			      struct isis_area *area, int lsp_top_num);
  122: #endif /* TOPOLOGY_GENERATE */
  123: 
  124: #endif /* ISIS_LSP */