// 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 */ /* 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 #define CAPABILITY_CODE_SOFT_VERSION_LEN 1 /* 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[]; #endif /* _QUAGGA_BGP_OPEN_H */