isisd/isis_te.h

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_te.c
   3  *
   4  * This is an implementation of RFC5305, RFC 5307 and RFC 7810
   5  *
   6  * Author: Olivier Dugeon <olivier.dugeon@orange.com>
   7  *
   8  * Copyright (C) 2014 - 2019 Orange Labs http://www.orange.com
   9  *
  10  * This file is part of GNU Zebra.
  11  *
  12  * GNU Zebra is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2, or (at your option) any
  15  * later version.
  16  *
  17  * GNU Zebra is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with this program; see the file COPYING; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  25  */
  26
  27 #ifndef _ZEBRA_ISIS_MPLS_TE_H
  28 #define _ZEBRA_ISIS_MPLS_TE_H
  29
  30 /*
  31  * Traffic Engineering information are transport through LSP:
  32  *  - Extended IS Reachability          TLV = 22
  33  *  - Traffic Engineering Router ID     TLV = 134
  34  *  - Extended IP Reachability          TLV = 135
  35  *  - Inter-AS Reachability Information TLV = 141
  36  *
  37  *  and support following sub-TLV:
  38  *
  39  * Name                           Value   Status
  40  * _________________________________________________
  41  * Administartive group (color)       3   RFC5305
  42  * Link Local/Remote Identifiers      4   RFC5307
  43  * IPv4 interface address             6   RFC5305
  44  * IPv4 neighbor address              8   RFC5305
  45  * Maximum link bandwidth             9   RFC5305
  46  * Reservable link bandwidth         10   RFC5305
  47  * Unreserved bandwidth              11   RFC5305
  48  * TE Default metric                 18   RFC5305
  49  * Link Protection Type              20   RFC5307
  50  * Interface Switching Capability    21   RFC5307
  51  * Remote AS number                  24   RFC5316
  52  * IPv4 Remote ASBR identifier       25   RFC5316
  53  *
  54  * NOTE: RFC5316 is not fully supported in this version
  55  * only subTLVs decoding is provided
  56  */
  57
  58 /* Following define the type of TE link regarding the various RFC */
  59 #define STD_TE                  0x01
  60 #define GMPLS                   0x02
  61 #define INTER_AS                0x04
  62 #define FLOOD_L1                0x10
  63 #define FLOOD_L2                0x20
  64 #define FLOOD_AS                0x40
  65 #define EMULATED                0x80
  66
  67 #define IS_STD_TE(x)            (x & STD_TE)
  68 #define IS_INTER_AS(x)          (x & INTER_AS)
  69 #define IS_EMULATED(x)          (x & EMULATED)
  70 #define IS_FLOOD_L1(x)          (x & FLOOD_L1)
  71 #define IS_FLOOD_L2(x)          (x & FLOOD_L2)
  72 #define IS_FLOOD_AS(x)          (x & FLOOD_AS)
  73 #define IS_INTER_AS_EMU(x)      (x & INTER_AS & EMULATED)
  74 #define IS_INTER_AS_AS(x)       (x & INTER_AS & FLOOD_AS)
  75
  76 /*
  77  * Note (since release 7.2), subTLVs definition, serialization
  78  * and de-serialization have mode to isis_tlvs.[c,h]
  79  */
  80
  81 /* Following declaration concerns the MPLS-TE and LINk-TE management */
  82 typedef enum _status_t { disable, enable, learn } status_t;
  83
  84 /* Mode for Inter-AS LSP */ /* TODO: Check how if LSP is flooded in RFC5316 */
  85 typedef enum _interas_mode_t { off, region, as, emulate } interas_mode_t;
  86
  87 #define IS_EXT_TE(e)    (e && e->status != 0                    \
  88                            && e->status != EXT_ADJ_SID          \
  89                            && e->status != EXT_LAN_ADJ_SID)
  90 #define IS_MPLS_TE(a)   (a && a->status == enable)
  91
  92 /* Per area MPLS-TE parameters */
  93 struct mpls_te_area {
  94         /* Status of MPLS-TE: enable or disable */
  95         status_t status;
  96
  97         /* L1, L1-L2, L2-Only */
  98         uint8_t level;
  99
 100         /* RFC5316 */
 101         interas_mode_t inter_as;
 102         struct in_addr interas_areaid;
 103
 104         /* MPLS_TE router ID */
 105         struct in_addr router_id;
 106 };
 107
 108 /* Prototypes. */
 109 void isis_mpls_te_init(void);
 110 void isis_link_params_update(struct isis_circuit *, struct interface *);
 111 int isis_mpls_te_update(struct interface *);
 112
 113 #endif /* _ZEBRA_ISIS_MPLS_TE_H */