bgpd/bgp_open.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* BGP open message handling
   3  * Copyright (C) 1999 Kunihiro Ishiguro
   4  */
   5
   6 #ifndef _QUAGGA_BGP_OPEN_H
   7 #define _QUAGGA_BGP_OPEN_H
   8
   9 /* Standard header for capability TLV */
  10 struct capability_header {
  11         uint8_t code;
  12         uint8_t length;
  13 };
  14
  15 /* Generic MP capability data */
  16 struct capability_mp_data {
  17         uint16_t afi; /* iana_afi_t */
  18         uint8_t reserved;
  19         uint8_t safi; /* iana_safi_t */
  20 };
  21
  22 struct graceful_restart_af {
  23         afi_t afi;
  24         safi_t safi;
  25         uint8_t flag;
  26 };
  27
  28 /* Capability Code */
  29 #define CAPABILITY_CODE_MP              1 /* Multiprotocol Extensions */
  30 #define CAPABILITY_CODE_REFRESH         2 /* Route Refresh Capability */
  31 #define CAPABILITY_CODE_ORF             3 /* Cooperative Route Filtering Capability */
  32 #define CAPABILITY_CODE_RESTART        64 /* Graceful Restart Capability */
  33 #define CAPABILITY_CODE_AS4            65 /* 4-octet AS number Capability */
  34 #define CAPABILITY_CODE_DYNAMIC_OLD    66 /* Dynamic Capability, deprecated since 2003 */
  35 #define CAPABILITY_CODE_DYNAMIC        67 /* Dynamic Capability */
  36 #define CAPABILITY_CODE_ADDPATH        69 /* Addpath Capability */
  37 #define CAPABILITY_CODE_ENHANCED_RR    70 /* Enhanced Route Refresh capability */
  38 #define CAPABILITY_CODE_LLGR           71 /* Long-lived Graceful Restart */
  39 #define CAPABILITY_CODE_FQDN           73 /* Advertise hostname capability */
  40 #define CAPABILITY_CODE_SOFT_VERSION   75 /* Software Version capability */
  41 #define CAPABILITY_CODE_ENHE            5 /* Extended Next Hop Encoding */
  42 #define CAPABILITY_CODE_REFRESH_OLD   128 /* Route Refresh Capability(cisco) */
  43 #define CAPABILITY_CODE_ORF_OLD       130 /* Cooperative Route Filtering Capability(cisco) */
  44 #define CAPABILITY_CODE_EXT_MESSAGE     6 /* Extended Message Support */
  45 #define CAPABILITY_CODE_ROLE            9 /* Role Capability */
  46
  47 /* Capability Length */
  48 #define CAPABILITY_CODE_MP_LEN          4
  49 #define CAPABILITY_CODE_REFRESH_LEN     0
  50 #define CAPABILITY_CODE_DYNAMIC_LEN     0
  51 #define CAPABILITY_CODE_RESTART_LEN     2 /* Receiving only case */
  52 #define CAPABILITY_CODE_AS4_LEN         4
  53 #define CAPABILITY_CODE_ADDPATH_LEN     4
  54 #define CAPABILITY_CODE_ENHE_LEN        6 /* NRLI AFI = 2, SAFI = 2, Nexthop AFI = 2 */
  55 #define CAPABILITY_CODE_MIN_FQDN_LEN    2
  56 #define CAPABILITY_CODE_ENHANCED_LEN    0
  57 #define CAPABILITY_CODE_LLGR_LEN        0
  58 #define CAPABILITY_CODE_ORF_LEN         5
  59 #define CAPABILITY_CODE_EXT_MESSAGE_LEN 0 /* Extended Message Support */
  60 #define CAPABILITY_CODE_ROLE_LEN        1
  61 #define CAPABILITY_CODE_SOFT_VERSION_LEN 1
  62
  63 /* Cooperative Route Filtering Capability.  */
  64
  65 /* ORF Type */
  66 #define ORF_TYPE_RESERVED               0
  67 #define ORF_TYPE_PREFIX                64
  68 #define ORF_TYPE_PREFIX_OLD           128
  69
  70 /* ORF Mode */
  71 #define ORF_MODE_RECEIVE                1
  72 #define ORF_MODE_SEND                   2
  73 #define ORF_MODE_BOTH                   3
  74
  75 /* Capability Message Action.  */
  76 #define CAPABILITY_ACTION_SET           0
  77 #define CAPABILITY_ACTION_UNSET         1
  78
  79 /* Graceful Restart */
  80 #define GRACEFUL_RESTART_R_BIT 0x8000
  81 #define GRACEFUL_RESTART_N_BIT 0x4000
  82 #define GRACEFUL_RESTART_F_BIT 0x80
  83
  84 /* Long-lived Graceful Restart */
  85 #define LLGR_F_BIT 0x80
  86
  87 /* Optional Parameters */
  88 #define BGP_OPEN_NON_EXT_OPT_LEN 255                  /* Non-Ext OP Len. */
  89 #define BGP_OPEN_NON_EXT_OPT_TYPE_EXTENDED_LENGTH 255 /* Non-Ext OP Type */
  90 #define BGP_OPEN_EXT_OPT_PARAMS_CAPABLE(peer)                                  \
  91         (CHECK_FLAG(peer->flags, PEER_FLAG_EXTENDED_OPT_PARAMS)                \
  92          || CHECK_FLAG(peer->sflags, PEER_STATUS_EXT_OPT_PARAMS_LENGTH))
  93
  94 extern int bgp_open_option_parse(struct peer *peer, uint16_t length,
  95                                  int *mp_capability);
  96 extern uint16_t bgp_open_capability(struct stream *s, struct peer *peer,
  97                                     bool ext_opt_params);
  98 extern void bgp_capability_vty_out(struct vty *vty, struct peer *peer,
  99                                    bool use_json, json_object *json_neigh);
 100 extern as_t peek_for_as4_capability(struct peer *peer, uint16_t length);
 101
 102 #endif /* _QUAGGA_BGP_OPEN_H */