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
  17 along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 #ifndef _QUAGGA_BGP_OPEN_H
  22 #define _QUAGGA_BGP_OPEN_H
  23
  24 #include <json/json.h>
  25
  26 /* Standard header for capability TLV */
  27 struct capability_header
  28 {
  29   u_char code;
  30   u_char length;
  31 };
  32
  33 /* Generic MP capability data */
  34 struct capability_mp_data
  35 {
  36   afi_t afi;
  37   u_char reserved;
  38   safi_t safi;
  39 };
  40
  41 #pragma pack(1)
  42 struct capability_orf_entry
  43 {
  44   struct capability_mp_data mpc;
  45   u_char num;
  46   struct {
  47     u_char type;
  48     u_char mode;
  49   } orfs[];
  50 } __attribute__ ((packed));
  51 #pragma pack()
  52
  53 struct capability_as4
  54 {
  55   uint32_t as4;
  56 };
  57
  58 struct graceful_restart_af
  59 {
  60   afi_t afi;
  61   safi_t safi;
  62   u_char flag;
  63 };
  64
  65 struct capability_gr
  66 {
  67   u_int16_t restart_flag_time;
  68   struct graceful_restart_af gr[];
  69 };
  70
  71 /* Capability Code */
  72 #define CAPABILITY_CODE_MP              1 /* Multiprotocol Extensions */
  73 #define CAPABILITY_CODE_REFRESH         2 /* Route Refresh Capability */
  74 #define CAPABILITY_CODE_ORF             3 /* Cooperative Route Filtering Capability */
  75 #define CAPABILITY_CODE_RESTART        64 /* Graceful Restart Capability */
  76 #define CAPABILITY_CODE_AS4            65 /* 4-octet AS number Capability */
  77 #define CAPABILITY_CODE_DYNAMIC_OLD    66 /* Dynamic Capability, deprecated since 2003 */
  78 #define CAPABILITY_CODE_DYNAMIC        67 /* Dynamic Capability */
  79 #define CAPABILITY_CODE_ADDPATH        69 /* Addpath Capability */
  80 #define CAPABILITY_CODE_ENHE            5 /* Extended Next Hop Encoding */
  81 #define CAPABILITY_CODE_REFRESH_OLD   128 /* Route Refresh Capability(cisco) */
  82 #define CAPABILITY_CODE_ORF_OLD       130 /* Cooperative Route Filtering Capability(cisco) */
  83 #define CAPABILITY_CODE_HOSTNAME      131 /* Advertise hostname capabilty */
  84
  85 /* Capability Length */
  86 #define CAPABILITY_CODE_MP_LEN          4
  87 #define CAPABILITY_CODE_REFRESH_LEN     0
  88 #define CAPABILITY_CODE_DYNAMIC_LEN     0
  89 #define CAPABILITY_CODE_RESTART_LEN     2 /* Receiving only case */
  90 #define CAPABILITY_CODE_AS4_LEN         4
  91 #define CAPABILITY_CODE_ADDPATH_LEN     4
  92 #define CAPABILITY_CODE_MIN_HOSTNAME_LEN 2
  93 #define CAPABILITY_CODE_ENHE_LEN        6 /* NRLI AFI = 2, SAFI = 2, Nexthop AFI = 2 */
  94
  95 /* Cooperative Route Filtering Capability.  */
  96
  97 /* ORF Type */
  98 #define ORF_TYPE_PREFIX                64
  99 #define ORF_TYPE_PREFIX_OLD           128
 100
 101 /* ORF Mode */
 102 #define ORF_MODE_RECEIVE                1
 103 #define ORF_MODE_SEND                   2
 104 #define ORF_MODE_BOTH                   3
 105
 106 /* Capability Message Action.  */
 107 #define CAPABILITY_ACTION_SET           0
 108 #define CAPABILITY_ACTION_UNSET         1
 109
 110 /* Graceful Restart */
 111 #define RESTART_R_BIT              0x8000
 112 #define RESTART_F_BIT              0x80
 113
 114 extern int bgp_open_option_parse (struct peer *, u_char, int *);
 115 extern void bgp_open_capability (struct stream *, struct peer *);
 116 extern void bgp_capability_vty_out (struct vty *, struct peer *);
 117 extern as_t peek_for_as4_capability (struct peer *, u_char);
 118 extern int bgp_afi_safi_valid_indices (afi_t, safi_t *);
 119
 120 #endif /* _QUAGGA_BGP_OPEN_H */