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 */
31struct 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
59dict_t *lsp_db_init (void);
60void lsp_db_destroy (dict_t * lspdb);
61int lsp_tick (struct thread *thread);
62
63int lsp_generate (struct isis_area *area, int level);
64int lsp_regenerate_schedule (struct isis_area *area, int level,
65                             int all_pseudo);
66int lsp_generate_pseudo (struct isis_circuit *circuit, int level);
67int lsp_regenerate_schedule_pseudo (struct isis_circuit *circuit, int level);
68
69struct 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);
72struct 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);
77void lsp_insert (struct isis_lsp *lsp, dict_t * lspdb);
78struct isis_lsp *lsp_search (u_char * id, dict_t * lspdb);
79
80void lsp_build_list (u_char * start_id, u_char * stop_id, u_char num_lsps,
81		     struct list *list, dict_t * lspdb);
82void lsp_build_list_nonzero_ht (u_char * start_id, u_char * stop_id,
83				struct list *list, dict_t * lspdb);
84void lsp_build_list_ssn (struct isis_circuit *circuit, u_char num_lsps,
85                         struct list *list, dict_t * lspdb);
86
87void lsp_search_and_destroy (u_char * id, dict_t * lspdb);
88void lsp_purge_pseudo (u_char * id, struct isis_circuit *circuit, int level);
89void 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
102int lsp_id_cmp (u_char * id1, u_char * id2);
103int lsp_compare (char *areatag, struct isis_lsp *lsp, u_int32_t seq_num,
104		 u_int16_t checksum, u_int16_t rem_lifetime);
105void lsp_update (struct isis_lsp *lsp, struct stream *stream,
106                 struct isis_area *area, int level);
107void lsp_inc_seqnum (struct isis_lsp *lsp, u_int32_t seq_num);
108void lsp_print (struct isis_lsp *lsp, struct vty *vty, char dynhost);
109void lsp_print_detail (struct isis_lsp *lsp, struct vty *vty, char dynhost);
110int lsp_print_all (struct vty *vty, dict_t * lspdb, char detail,
111		   char dynhost);
112const char *lsp_bits2string (u_char *);
113
114/* sets SRMflags for all active circuits of an lsp */
115void lsp_set_all_srmflags (struct isis_lsp *lsp);
116
117#ifdef TOPOLOGY_GENERATE
118void generate_topology_lsps (struct isis_area *area);
119void remove_topology_lsps (struct isis_area *area);
120void 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 */
125