isisd/isis_mt.h

   1 /*
   2  * IS-IS Rout(e)ing protocol - Multi Topology Support
   3  *
   4  * Copyright (C) 2017 Christian Franke
   5  *
   6  * This file is part of FRRouting (FRR)
   7  *
   8  * FRR is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * FRR is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #ifndef ISIS_MT_H
  23 #define ISIS_MT_H
  24
  25 #define ISIS_MT_MASK           0x0fff
  26 #define ISIS_MT_OL_MASK        0x8000
  27 #define ISIS_MT_AT_MASK        0x4000
  28
  29 #define ISIS_MT_IPV4_UNICAST   0
  30 #define ISIS_MT_IPV4_MGMT      1
  31 #define ISIS_MT_IPV6_UNICAST   2
  32 #define ISIS_MT_IPV4_MULTICAST 3
  33 #define ISIS_MT_IPV6_MULTICAST 4
  34 #define ISIS_MT_IPV6_MGMT      5
  35 #define ISIS_MT_IPV6_DSTSRC    3996 /* FIXME: IANA */
  36 /* Use first Reserved Flag to indicate that there is no MT Topology active */
  37 #define ISIS_MT_DISABLE        4096
  38
  39 #define ISIS_MT_NAMES                                                          \
  40         "<ipv4-unicast"                                                        \
  41         "|ipv4-mgmt"                                                           \
  42         "|ipv6-unicast"                                                        \
  43         "|ipv4-multicast"                                                      \
  44         "|ipv6-multicast"                                                      \
  45         "|ipv6-mgmt"                                                           \
  46         "|ipv6-dstsrc"                                                         \
  47         ">"
  48
  49 #define ISIS_MT_DESCRIPTIONS                                                   \
  50         "IPv4 unicast topology\n"                                              \
  51         "IPv4 management topology\n"                                           \
  52         "IPv6 unicast topology\n"                                              \
  53         "IPv4 multicast topology\n"                                            \
  54         "IPv6 multicast topology\n"                                            \
  55         "IPv6 management topology\n"                                           \
  56         "IPv6 dst-src topology\n"                                              \
  57         ""
  58
  59 #define ISIS_MT_INFO_FIELDS uint16_t mtid;
  60
  61 struct list;
  62
  63 struct isis_area_mt_setting {
  64         ISIS_MT_INFO_FIELDS
  65         bool enabled;
  66         bool overload;
  67 };
  68
  69 struct isis_circuit_mt_setting {
  70         ISIS_MT_INFO_FIELDS
  71         bool enabled;
  72 };
  73
  74 const char *isis_mtid2str(uint16_t mtid);
  75 uint16_t isis_str2mtid(const char *name);
  76
  77 struct isis_adjacency;
  78 struct isis_area;
  79 struct isis_circuit;
  80 struct tlvs;
  81 struct te_is_neigh;
  82 struct isis_tlvs;
  83
  84 bool isis_area_ipv6_dstsrc_enabled(struct isis_area *area);
  85
  86 uint16_t isis_area_ipv6_topology(struct isis_area *area);
  87
  88 struct isis_area_mt_setting *area_lookup_mt_setting(struct isis_area *area,
  89                                                     uint16_t mtid);
  90 struct isis_area_mt_setting *area_new_mt_setting(struct isis_area *area,
  91                                                  uint16_t mtid);
  92 void area_add_mt_setting(struct isis_area *area,
  93                          struct isis_area_mt_setting *setting);
  94
  95 void area_mt_init(struct isis_area *area);
  96 void area_mt_finish(struct isis_area *area);
  97 struct isis_area_mt_setting *area_get_mt_setting(struct isis_area *area,
  98                                                  uint16_t mtid);
  99 int area_write_mt_settings(struct isis_area *area, struct vty *vty);
 100 bool area_is_mt(struct isis_area *area);
 101 struct isis_area_mt_setting **area_mt_settings(struct isis_area *area,
 102                                                unsigned int *mt_count);
 103
 104 struct isis_circuit_mt_setting *
 105 circuit_lookup_mt_setting(struct isis_circuit *circuit, uint16_t mtid);
 106 struct isis_circuit_mt_setting *
 107 circuit_new_mt_setting(struct isis_circuit *circuit, uint16_t mtid);
 108 void circuit_add_mt_setting(struct isis_circuit *circuit,
 109                             struct isis_circuit_mt_setting *setting);
 110 void circuit_mt_init(struct isis_circuit *circuit);
 111 void circuit_mt_finish(struct isis_circuit *circuit);
 112 struct isis_circuit_mt_setting *
 113 circuit_get_mt_setting(struct isis_circuit *circuit, uint16_t mtid);
 114 struct isis_circuit_mt_setting **
 115 circuit_mt_settings(struct isis_circuit *circuit, unsigned int *mt_count);
 116 bool tlvs_to_adj_mt_set(struct isis_tlvs *tlvs, bool v4_usable, bool v6_usable,
 117                         struct isis_adjacency *adj);
 118 bool adj_has_mt(struct isis_adjacency *adj, uint16_t mtid);
 119 void adj_mt_finish(struct isis_adjacency *adj);
 120 void tlvs_add_mt_bcast(struct isis_tlvs *tlvs, struct isis_circuit *circuit,
 121                        int level, uint8_t *id, uint32_t metric);
 122 void tlvs_add_mt_p2p(struct isis_tlvs *tlvs, struct isis_circuit *circuit,
 123                      uint8_t *id, uint32_t metric);
 124 void mt_init(void);
 125 #endif