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 #include "isisd/isis_pdu.h"
  28
  29 /* Structure for isis_lsp, this structure will only support the fixed
  30  * System ID (Currently 6) (atleast for now). In order to support more
  31  * We will have to split the header into two parts, and for readability
  32  * sake it should better be avoided */
  33 struct isis_lsp {
  34         struct isis_lsp_hdr hdr;
  35         struct stream *pdu; /* full pdu lsp */
  36         union {
  37                 struct list *frags;
  38                 struct isis_lsp *zero_lsp;
  39         } lspu;
  40         uint32_t SSNflags[ISIS_MAX_CIRCUITS];
  41         int level;     /* L1 or L2? */
  42         int scheduled; /* scheduled for sending */
  43         time_t installed;
  44         time_t last_generated;
  45         int own_lsp;
  46         /* used for 60 second counting when rem_lifetime is zero */
  47         int age_out;
  48         struct isis_area *area;
  49         struct isis_tlvs *tlvs;
  50 };
  51
  52 dict_t *lsp_db_init(void);
  53 void lsp_db_destroy(dict_t *lspdb);
  54 int lsp_tick(struct thread *thread);
  55
  56 int lsp_generate(struct isis_area *area, int level);
  57 int lsp_regenerate_schedule(struct isis_area *area, int level, int all_pseudo);
  58 int lsp_generate_pseudo(struct isis_circuit *circuit, int level);
  59 int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level);
  60
  61 struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id,
  62                          uint16_t rem_lifetime, uint32_t seq_num,
  63                          uint8_t lsp_bits, uint16_t checksum,
  64                          struct isis_lsp *lsp0, int level);
  65 struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr,
  66                                    struct isis_tlvs *tlvs,
  67                                    struct stream *stream, struct isis_lsp *lsp0,
  68                                    struct isis_area *area, int level);
  69 void lsp_insert(struct isis_lsp *lsp, dict_t *lspdb);
  70 struct isis_lsp *lsp_search(uint8_t *id, dict_t *lspdb);
  71
  72 void lsp_build_list(uint8_t *start_id, uint8_t *stop_id, uint8_t num_lsps,
  73                     struct list *list, dict_t *lspdb);
  74 void lsp_build_list_nonzero_ht(uint8_t *start_id, uint8_t *stop_id,
  75                                struct list *list, dict_t *lspdb);
  76 void lsp_search_and_destroy(uint8_t *id, dict_t *lspdb);
  77 void lsp_purge_pseudo(uint8_t *id, struct isis_circuit *circuit, int level);
  78 void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr,
  79                          struct isis_area *area);
  80
  81 #define LSP_EQUAL 1
  82 #define LSP_NEWER 2
  83 #define LSP_OLDER 3
  84
  85 #define LSP_PSEUDO_ID(I) ((I)[ISIS_SYS_ID_LEN])
  86 #define LSP_FRAGMENT(I) ((I)[ISIS_SYS_ID_LEN + 1])
  87 #define OWNLSPID(I)                                                            \
  88         memcpy((I), isis->sysid, ISIS_SYS_ID_LEN);                             \
  89         (I)[ISIS_SYS_ID_LEN] = 0;                                              \
  90         (I)[ISIS_SYS_ID_LEN + 1] = 0
  91 int lsp_id_cmp(uint8_t *id1, uint8_t *id2);
  92 int lsp_compare(char *areatag, struct isis_lsp *lsp, uint32_t seqno,
  93                 uint16_t checksum, uint16_t rem_lifetime);
  94 void lsp_update(struct isis_lsp *lsp, struct isis_lsp_hdr *hdr,
  95                 struct isis_tlvs *tlvs, struct stream *stream,
  96                 struct isis_area *area, int level, bool confusion);
  97 void lsp_inc_seqno(struct isis_lsp *lsp, uint32_t seqno);
  98 void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost);
  99 void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost);
 100 int lsp_print_all(struct vty *vty, dict_t *lspdb, char detail, char dynhost);
 101 /* sets SRMflags for all active circuits of an lsp */
 102 void lsp_set_all_srmflags(struct isis_lsp *lsp, bool set);
 103 void lsp_flood(struct isis_lsp *lsp, struct isis_circuit *circuit);
 104
 105 #endif /* ISIS_LSP */