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