bgpd/bgp_packet.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* BGP packet management header.
   3  * Copyright (C) 1999 Kunihiro Ishiguro
   4  */
   5
   6 #ifndef _QUAGGA_BGP_PACKET_H
   7 #define _QUAGGA_BGP_PACKET_H
   8
   9 #include "hook.h"
  10
  11 DECLARE_HOOK(bgp_packet_dump,
  12                 (struct peer *peer, uint8_t type, bgp_size_t size,
  13                         struct stream *s),
  14                 (peer, type, size, s));
  15
  16 DECLARE_HOOK(bgp_packet_send,
  17                 (struct peer *peer, uint8_t type, bgp_size_t size,
  18                         struct stream *s),
  19                 (peer, type, size, s));
  20
  21 #define BGP_NLRI_LENGTH       1U
  22 #define BGP_TOTAL_ATTR_LEN    2U
  23 #define BGP_UNFEASIBLE_LEN    2U
  24
  25 /* When to refresh */
  26 #define REFRESH_IMMEDIATE 1
  27 #define REFRESH_DEFER     2
  28
  29 /* ORF Common part flag */
  30 #define ORF_COMMON_PART_ADD        0x00
  31 #define ORF_COMMON_PART_REMOVE     0x80
  32 #define ORF_COMMON_PART_REMOVE_ALL 0xC0
  33 #define ORF_COMMON_PART_PERMIT     0x00
  34 #define ORF_COMMON_PART_DENY       0x20
  35
  36 #define BGP_UPDATE_EOR_PKT(_peer, _afi, _safi, _s)                             \
  37         do {                                                                   \
  38                 _s = bgp_update_packet_eor(_peer, _afi, _safi);                \
  39                 if (_s) {                                                      \
  40                         bgp_packet_add(_peer, _s);                             \
  41                 }                                                              \
  42         } while (0)
  43
  44 /* Packet send and receive function prototypes. */
  45 extern void bgp_keepalive_send(struct peer *peer);
  46 extern void bgp_open_send(struct peer *peer);
  47 extern void bgp_notify_send(struct peer *peer, uint8_t code, uint8_t sub_code);
  48 extern void bgp_notify_send_with_data(struct peer *peer, uint8_t code,
  49                                       uint8_t sub_code, uint8_t *data,
  50                                       size_t datalen);
  51 void bgp_notify_io_invalid(struct peer *peer, uint8_t code, uint8_t sub_code,
  52                            uint8_t *data, size_t datalen);
  53 extern void bgp_route_refresh_send(struct peer *peer, afi_t afi, safi_t safi,
  54                                    uint8_t orf_type, uint8_t when_to_refresh,
  55                                    int remove, uint8_t subtype);
  56 extern void bgp_capability_send(struct peer *peer, afi_t afi, safi_t safi,
  57                                 int capabilty_code, int action);
  58
  59 extern int bgp_capability_receive(struct peer *peer, bgp_size_t length);
  60
  61 extern int bgp_nlri_parse(struct peer *peer, struct attr *attr,
  62                           struct bgp_nlri *nlri, bool mp_withdraw);
  63
  64 extern void bgp_update_restarted_peers(struct peer *peer);
  65 extern void bgp_update_implicit_eors(struct peer *peer);
  66 extern void bgp_check_update_delay(struct bgp *peer);
  67
  68 extern int bgp_packet_set_marker(struct stream *s, uint8_t type);
  69 extern void bgp_packet_set_size(struct stream *s);
  70
  71 extern void bgp_generate_updgrp_packets(struct event *event);
  72 extern void bgp_process_packet(struct event *event);
  73
  74 extern void bgp_send_delayed_eor(struct bgp *bgp);
  75
  76 /* Task callback to handle socket error encountered in the io pthread */
  77 void bgp_packet_process_error(struct event *thread);
  78 extern struct bgp_notify
  79 bgp_notify_decapsulate_hard_reset(struct bgp_notify *notify);
  80 extern bool bgp_has_graceful_restart_notification(struct peer *peer);
  81 extern bool bgp_notify_send_hard_reset(struct peer *peer, uint8_t code,
  82                                        uint8_t subcode);
  83 extern bool bgp_notify_received_hard_reset(struct peer *peer, uint8_t code,
  84                                            uint8_t subcode);
  85
  86 #endif /* _QUAGGA_BGP_PACKET_H */