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         u_char code;
  27         u_char length;
  28 };
  29
  30 /* Generic MP capability data */
  31 struct capability_mp_data {
  32         iana_afi_t afi;
  33         u_char reserved;
  34         safi_t safi;
  35 };
  36
  37 struct capability_as4 {
  38         uint32_t as4;
  39 };
  40
  41 struct graceful_restart_af {
  42         afi_t afi;
  43         safi_t safi;
  44         u_char flag;
  45 };
  46
  47 struct capability_gr {
  48         u_int16_t restart_flag_time;
  49         struct graceful_restart_af gr[];
  50 };
  51
  52 /* Capability Code */
  53 #define CAPABILITY_CODE_MP              1 /* Multiprotocol Extensions */
  54 #define CAPABILITY_CODE_REFRESH         2 /* Route Refresh Capability */
  55 #define CAPABILITY_CODE_ORF             3 /* Cooperative Route Filtering Capability */
  56 #define CAPABILITY_CODE_RESTART        64 /* Graceful Restart Capability */
  57 #define CAPABILITY_CODE_AS4            65 /* 4-octet AS number Capability */
  58 #define CAPABILITY_CODE_DYNAMIC_OLD    66 /* Dynamic Capability, deprecated since 2003 */
  59 #define CAPABILITY_CODE_DYNAMIC        67 /* Dynamic Capability */
  60 #define CAPABILITY_CODE_ADDPATH        69 /* Addpath Capability */
  61 #define CAPABILITY_CODE_FQDN           73 /* Advertise hostname capabilty */
  62 #define CAPABILITY_CODE_ENHE            5 /* Extended Next Hop Encoding */
  63 #define CAPABILITY_CODE_REFRESH_OLD   128 /* Route Refresh Capability(cisco) */
  64 #define CAPABILITY_CODE_ORF_OLD       130 /* Cooperative Route Filtering Capability(cisco) */
  65
  66 /* Capability Length */
  67 #define CAPABILITY_CODE_MP_LEN          4
  68 #define CAPABILITY_CODE_REFRESH_LEN     0
  69 #define CAPABILITY_CODE_DYNAMIC_LEN     0
  70 #define CAPABILITY_CODE_RESTART_LEN     2 /* Receiving only case */
  71 #define CAPABILITY_CODE_AS4_LEN         4
  72 #define CAPABILITY_CODE_ADDPATH_LEN     4
  73 #define CAPABILITY_CODE_ENHE_LEN        6 /* NRLI AFI = 2, SAFI = 2, Nexthop AFI = 2 */
  74 #define CAPABILITY_CODE_MIN_FQDN_LEN    2
  75 #define CAPABILITY_CODE_ORF_LEN         5
  76
  77 /* Cooperative Route Filtering Capability.  */
  78
  79 /* ORF Type */
  80 #define ORF_TYPE_PREFIX                64
  81 #define ORF_TYPE_PREFIX_OLD           128
  82
  83 /* ORF Mode */
  84 #define ORF_MODE_RECEIVE                1
  85 #define ORF_MODE_SEND                   2
  86 #define ORF_MODE_BOTH                   3
  87
  88 /* Capability Message Action.  */
  89 #define CAPABILITY_ACTION_SET           0
  90 #define CAPABILITY_ACTION_UNSET         1
  91
  92 /* Graceful Restart */
  93 #define RESTART_R_BIT              0x8000
  94 #define RESTART_F_BIT              0x80
  95
  96 extern int bgp_open_option_parse(struct peer *, u_char, int *);
  97 extern void bgp_open_capability(struct stream *, struct peer *);
  98 extern void bgp_capability_vty_out(struct vty *, struct peer *, u_char,
  99                                    json_object *);
 100 extern as_t peek_for_as4_capability(struct peer *, u_char);
 101
 102 #endif /* _QUAGGA_BGP_OPEN_H */