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/* BGP open message handling
* Copyright (C) 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _QUAGGA_BGP_OPEN_H
#define _QUAGGA_BGP_OPEN_H
/* Standard header for capability TLV */
struct capability_header {
uint8_t code;
uint8_t length;
};
/* Generic MP capability data */
struct capability_mp_data {
uint16_t afi; /* iana_afi_t */
uint8_t reserved;
uint8_t safi; /* iana_safi_t */
};
struct graceful_restart_af {
afi_t afi;
safi_t safi;
uint8_t flag;
};
/* Capability Code */
#define CAPABILITY_CODE_MP 1 /* Multiprotocol Extensions */
#define CAPABILITY_CODE_REFRESH 2 /* Route Refresh Capability */
#define CAPABILITY_CODE_ORF 3 /* Cooperative Route Filtering Capability */
#define CAPABILITY_CODE_RESTART 64 /* Graceful Restart Capability */
#define CAPABILITY_CODE_AS4 65 /* 4-octet AS number Capability */
#define CAPABILITY_CODE_DYNAMIC_OLD 66 /* Dynamic Capability, deprecated since 2003 */
#define CAPABILITY_CODE_DYNAMIC 67 /* Dynamic Capability */
#define CAPABILITY_CODE_ADDPATH 69 /* Addpath Capability */
#define CAPABILITY_CODE_ENHANCED_RR 70 /* Enhanced Route Refresh capability */
#define CAPABILITY_CODE_LLGR 71 /* Long-lived Graceful Restart */
#define CAPABILITY_CODE_FQDN 73 /* Advertise hostname capability */
#define CAPABILITY_CODE_ENHE 5 /* Extended Next Hop Encoding */
#define CAPABILITY_CODE_REFRESH_OLD 128 /* Route Refresh Capability(cisco) */
#define CAPABILITY_CODE_ORF_OLD 130 /* Cooperative Route Filtering Capability(cisco) */
#define CAPABILITY_CODE_EXT_MESSAGE 6 /* Extended Message Support */
#define CAPABILITY_CODE_ROLE 9 /* Role Capability */
/* Capability Length */
#define CAPABILITY_CODE_MP_LEN 4
#define CAPABILITY_CODE_REFRESH_LEN 0
#define CAPABILITY_CODE_DYNAMIC_LEN 0
#define CAPABILITY_CODE_RESTART_LEN 2 /* Receiving only case */
#define CAPABILITY_CODE_AS4_LEN 4
#define CAPABILITY_CODE_ADDPATH_LEN 4
#define CAPABILITY_CODE_ENHE_LEN 6 /* NRLI AFI = 2, SAFI = 2, Nexthop AFI = 2 */
#define CAPABILITY_CODE_MIN_FQDN_LEN 2
#define CAPABILITY_CODE_ENHANCED_LEN 0
#define CAPABILITY_CODE_LLGR_LEN 0
#define CAPABILITY_CODE_ORF_LEN 5
#define CAPABILITY_CODE_EXT_MESSAGE_LEN 0 /* Extended Message Support */
#define CAPABILITY_CODE_ROLE_LEN 1
/* Cooperative Route Filtering Capability. */
/* ORF Type */
#define ORF_TYPE_PREFIX 64
#define ORF_TYPE_PREFIX_OLD 128
/* ORF Mode */
#define ORF_MODE_RECEIVE 1
#define ORF_MODE_SEND 2
#define ORF_MODE_BOTH 3
/* Capability Message Action. */
#define CAPABILITY_ACTION_SET 0
#define CAPABILITY_ACTION_UNSET 1
/* Graceful Restart */
#define GRACEFUL_RESTART_R_BIT 0x8000
#define GRACEFUL_RESTART_N_BIT 0x4000
#define GRACEFUL_RESTART_F_BIT 0x80
/* Long-lived Graceful Restart */
#define LLGR_F_BIT 0x80
/* Optional Parameters */
#define BGP_OPEN_NON_EXT_OPT_LEN 255 /* Non-Ext OP Len. */
#define BGP_OPEN_NON_EXT_OPT_TYPE_EXTENDED_LENGTH 255 /* Non-Ext OP Type */
#define BGP_OPEN_EXT_OPT_PARAMS_CAPABLE(peer) \
(CHECK_FLAG(peer->flags, PEER_FLAG_EXTENDED_OPT_PARAMS) \
|| CHECK_FLAG(peer->sflags, PEER_STATUS_EXT_OPT_PARAMS_LENGTH))
extern int bgp_open_option_parse(struct peer *peer, uint16_t length,
int *mp_capability);
extern uint16_t bgp_open_capability(struct stream *s, struct peer *peer,
bool ext_opt_params);
extern void bgp_capability_vty_out(struct vty *vty, struct peer *peer,
bool use_json, json_object *json_neigh);
extern as_t peek_for_as4_capability(struct peer *peer, uint16_t length);
#endif /* _QUAGGA_BGP_OPEN_H */
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