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bgp_open.h
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// SPDX-License-Identifier: GPL-2.0-or-later
/* BGP open message handling
* Copyright (C) 1999 Kunihiro Ishiguro
*/
#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 {
uint16_t afi;
uint8_t safi;
uint8_t flag;
};
/*
* +--------------------------------------------------+
* | Address Family Identifier (16 bits) |
* +--------------------------------------------------+
* | Subsequent Address Family Identifier (8 bits) |
* +--------------------------------------------------+
* | Flags for Address Family (8 bits) |
* +--------------------------------------------------+
* | Long-lived Stale Time (24 bits) |
* +--------------------------------------------------+
*/
#define BGP_CAP_LLGR_MIN_PACKET_LEN 7
/* 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 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_SOFT_VERSION 75 /* Software Version capability */
#define CAPABILITY_CODE_ENHE 5 /* Extended Next Hop Encoding */
#define CAPABILITY_CODE_EXT_MESSAGE 6 /* Extended Message Support */
#define CAPABILITY_CODE_ROLE 9 /* Role Capability */
#define CAPABILITY_CODE_PATHS_LIMIT 76 /* Paths Limit Capability */
#define CAPABILITY_CODE_LINK_LOCAL 77 /* draft-white-linklocal-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_PATHS_LIMIT_LEN 5
#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
#define CAPABILITY_CODE_SOFT_VERSION_LEN 1
#define CAPABILITY_CODE_LINK_LOCAL_LEN 0
/* Cooperative Route Filtering Capability. */
/* ORF Type */
#define ORF_TYPE_RESERVED 0
#define ORF_TYPE_PREFIX 64
/* 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);
extern const struct message capcode_str[];
extern const struct message orf_type_str[];
extern const struct message orf_mode_str[];
extern const size_t cap_minsizes[];
extern const size_t cap_modsizes[];
#endif /* _QUAGGA_BGP_OPEN_H */