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         struct isis_fixed_hdr *isis_header;     /* normally equals pdu */
  33         struct isis_link_state_hdr *lsp_header; /* pdu + isis_header_len */
  34         struct stream *pdu;                     /* full pdu lsp */
  35         union {
  36                 struct list *frags;
  37                 struct isis_lsp *zero_lsp;
  38         } lspu;
  39         u_int32_t auth_tlv_offset; /* authentication TLV position in the pdu */
  40         u_int32_t SRMflags[ISIS_MAX_CIRCUITS];
  41         u_int32_t SSNflags[ISIS_MAX_CIRCUITS];
  42         int level;     /* L1 or L2? */
  43         int scheduled; /* scheduled for sending */
  44         time_t installed;
  45         time_t last_generated;
  46         int own_lsp;
  47         /* used for 60 second counting when rem_lifetime is zero */
  48         int age_out;
  49         struct isis_area *area;
  50         struct tlvs tlv_data; /* Simplifies TLV access */
  51 };
  52
  53 dict_t *lsp_db_init(void);
  54 void lsp_db_destroy(dict_t *lspdb);
  55 int lsp_tick(struct thread *thread);
  56
  57 int lsp_generate(struct isis_area *area, int level);
  58 int lsp_regenerate_schedule(struct isis_area *area, int level, int all_pseudo);
  59 int lsp_generate_pseudo(struct isis_circuit *circuit, int level);
  60 int lsp_regenerate_schedule_pseudo(struct isis_circuit *circuit, int level);
  61
  62 struct isis_lsp *lsp_new(struct isis_area *area, u_char *lsp_id,
  63                          u_int16_t rem_lifetime, u_int32_t seq_num,
  64                          u_int8_t lsp_bits, u_int16_t checksum, int level);
  65 struct isis_lsp *lsp_new_from_stream_ptr(struct stream *stream,
  66                                          u_int16_t pdu_len,
  67                                          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(u_char *id, dict_t *lspdb);
  71
  72 void lsp_build_list(u_char *start_id, u_char *stop_id, u_char num_lsps,
  73                     struct list *list, dict_t *lspdb);
  74 void lsp_build_list_nonzero_ht(u_char *start_id, u_char *stop_id,
  75                                struct list *list, dict_t *lspdb);
  76 void lsp_build_list_ssn(struct isis_circuit *circuit, u_char num_lsps,
  77                         struct list *list, dict_t *lspdb);
  78
  79 void lsp_search_and_destroy(u_char *id, dict_t *lspdb);
  80 void lsp_purge_pseudo(u_char *id, struct isis_circuit *circuit, int level);
  81 void lsp_purge_non_exist(int level, struct isis_link_state_hdr *lsp_hdr,
  82                          struct isis_area *area);
  83
  84 #define LSP_EQUAL 1
  85 #define LSP_NEWER 2
  86 #define LSP_OLDER 3
  87
  88 #define LSP_PSEUDO_ID(I) ((I)[ISIS_SYS_ID_LEN])
  89 #define LSP_FRAGMENT(I) ((I)[ISIS_SYS_ID_LEN + 1])
  90 #define OWNLSPID(I)                                                            \
  91         memcpy((I), isis->sysid, ISIS_SYS_ID_LEN);                             \
  92         (I)[ISIS_SYS_ID_LEN] = 0;                                              \
  93         (I)[ISIS_SYS_ID_LEN + 1] = 0
  94 int lsp_id_cmp(u_char *id1, u_char *id2);
  95 int lsp_compare(char *areatag, struct isis_lsp *lsp, u_int32_t seq_num,
  96                 u_int16_t checksum, u_int16_t rem_lifetime);
  97 void lsp_update(struct isis_lsp *lsp, struct stream *stream,
  98                 struct isis_area *area, int level);
  99 void lsp_inc_seqnum(struct isis_lsp *lsp, u_int32_t seq_num);
 100 void lsp_print(struct isis_lsp *lsp, struct vty *vty, char dynhost);
 101 void lsp_print_detail(struct isis_lsp *lsp, struct vty *vty, char dynhost);
 102 int lsp_print_all(struct vty *vty, dict_t *lspdb, char detail, char dynhost);
 103 const char *lsp_bits2string(u_char *);
 104 void lsp_te_tlv_fit(struct isis_lsp *lsp, struct list **from, struct list **to,
 105                     int frag_thold);
 106
 107 /* sets SRMflags for all active circuits of an lsp */
 108 void lsp_set_all_srmflags(struct isis_lsp *lsp);
 109
 110 #endif /* ISIS_LSP */