bgpd/bgp_open.h

   1 /* BGP open message handling
   2  * Copyright (C) 1999 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _QUAGGA_BGP_OPEN_H
  22 #define _QUAGGA_BGP_OPEN_H
  23
  24 /* Standard header for capability TLV */
  25 struct capability_header {
  26         uint8_t code;
  27         uint8_t length;
  28 };
  29
  30 /* Generic MP capability data */
  31 struct capability_mp_data {
  32         uint16_t afi; /* iana_afi_t */
  33         uint8_t reserved;
  34         uint8_t safi; /* iana_safi_t */
  35 };
  36
  37 struct graceful_restart_af {
  38         afi_t afi;
  39         safi_t safi;
  40         uint8_t flag;
  41 };
  42
  43 /* Capability Code */
  44 #define CAPABILITY_CODE_MP              1 /* Multiprotocol Extensions */
  45 #define CAPABILITY_CODE_REFRESH         2 /* Route Refresh Capability */
  46 #define CAPABILITY_CODE_ORF             3 /* Cooperative Route Filtering Capability */
  47 #define CAPABILITY_CODE_RESTART        64 /* Graceful Restart Capability */
  48 #define CAPABILITY_CODE_AS4            65 /* 4-octet AS number Capability */
  49 #define CAPABILITY_CODE_DYNAMIC_OLD    66 /* Dynamic Capability, deprecated since 2003 */
  50 #define CAPABILITY_CODE_DYNAMIC        67 /* Dynamic Capability */
  51 #define CAPABILITY_CODE_ADDPATH        69 /* Addpath Capability */
  52 #define CAPABILITY_CODE_ENHANCED_RR    70 /* Enhanced Route Refresh capability */
  53 #define CAPABILITY_CODE_LLGR           71 /* Long-lived Graceful Restart */
  54 #define CAPABILITY_CODE_FQDN           73 /* Advertise hostname capability */
  55 #define CAPABILITY_CODE_ENHE            5 /* Extended Next Hop Encoding */
  56 #define CAPABILITY_CODE_REFRESH_OLD   128 /* Route Refresh Capability(cisco) */
  57 #define CAPABILITY_CODE_ORF_OLD       130 /* Cooperative Route Filtering Capability(cisco) */
  58 #define CAPABILITY_CODE_EXT_MESSAGE     6 /* Extended Message Support */
  59
  60 /* Capability Length */
  61 #define CAPABILITY_CODE_MP_LEN          4
  62 #define CAPABILITY_CODE_REFRESH_LEN     0
  63 #define CAPABILITY_CODE_DYNAMIC_LEN     0
  64 #define CAPABILITY_CODE_RESTART_LEN     2 /* Receiving only case */
  65 #define CAPABILITY_CODE_AS4_LEN         4
  66 #define CAPABILITY_CODE_ADDPATH_LEN     4
  67 #define CAPABILITY_CODE_ENHE_LEN        6 /* NRLI AFI = 2, SAFI = 2, Nexthop AFI = 2 */
  68 #define CAPABILITY_CODE_MIN_FQDN_LEN    2
  69 #define CAPABILITY_CODE_ENHANCED_LEN    0
  70 #define CAPABILITY_CODE_LLGR_LEN        0
  71 #define CAPABILITY_CODE_ORF_LEN         5
  72 #define CAPABILITY_CODE_EXT_MESSAGE_LEN 0 /* Extended Message Support */
  73
  74 /* Cooperative Route Filtering Capability.  */
  75
  76 /* ORF Type */
  77 #define ORF_TYPE_PREFIX                64
  78 #define ORF_TYPE_PREFIX_OLD           128
  79
  80 /* ORF Mode */
  81 #define ORF_MODE_RECEIVE                1
  82 #define ORF_MODE_SEND                   2
  83 #define ORF_MODE_BOTH                   3
  84
  85 /* Capability Message Action.  */
  86 #define CAPABILITY_ACTION_SET           0
  87 #define CAPABILITY_ACTION_UNSET         1
  88
  89 /* Graceful Restart */
  90 #define RESTART_R_BIT              0x8000
  91 #define RESTART_F_BIT              0x80
  92
  93 /* Long-lived Graceful Restart */
  94 #define LLGR_F_BIT 0x80
  95
  96 /* Optional Parameters */
  97 #define BGP_OPEN_NON_EXT_OPT_LEN 255                  /* Non-Ext OP Len. */
  98 #define BGP_OPEN_NON_EXT_OPT_TYPE_EXTENDED_LENGTH 255 /* Non-Ext OP Type */
  99 #define BGP_OPEN_EXT_OPT_PARAMS_CAPABLE(peer)                                  \
 100         (CHECK_FLAG(peer->flags, PEER_FLAG_EXTENDED_OPT_PARAMS)                \
 101          || CHECK_FLAG(peer->sflags, PEER_STATUS_EXT_OPT_PARAMS_LENGTH))
 102
 103 extern int bgp_open_option_parse(struct peer *peer, uint16_t length,
 104                                  int *mp_capability);
 105 extern uint16_t bgp_open_capability(struct stream *s, struct peer *peer,
 106                                     bool ext_opt_params);
 107 extern void bgp_capability_vty_out(struct vty *vty, struct peer *peer,
 108                                    bool use_json, json_object *json_neigh);
 109 extern as_t peek_for_as4_capability(struct peer *peer, uint16_t length);
 110
 111 #endif /* _QUAGGA_BGP_OPEN_H */