1/* BGP open message handling
2   Copyright (C) 1999 Kunihiro Ishiguro
3
4This file is part of GNU Zebra.
5
6GNU Zebra is free software; you can redistribute it and/or modify it
7under the terms of the GNU General Public License as published by the
8Free Software Foundation; either version 2, or (at your option) any
9later version.
10
11GNU Zebra is distributed in the hope that it will be useful, but
12WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Zebra; see the file COPYING.  If not, write to the Free
18Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
1902111-1307, USA.  */
20
21#ifndef _QUAGGA_BGP_OPEN_H
22#define _QUAGGA_BGP_OPEN_H
23
24/* Standard header for capability TLV */
25struct capability_header
26{
27  u_char code;
28  u_char length;
29};
30
31/* Generic MP capability data */
32struct capability_mp_data
33{
34  afi_t afi;
35  u_char reserved;
36  safi_t safi;
37};
38
39#pragma pack(1)
40struct capability_orf_entry
41{
42  struct capability_mp_data mpc;
43  u_char num;
44  struct {
45    u_char type;
46    u_char mode;
47  } orfs[];
48} __attribute__ ((packed));
49#pragma pack()
50
51struct capability_as4
52{
53  uint32_t as4;
54};
55
56struct graceful_restart_af
57{
58  afi_t afi;
59  safi_t safi;
60  u_char flag;
61};
62
63struct capability_gr
64{
65  u_int16_t restart_flag_time;
66  struct graceful_restart_af gr[];
67};
68
69/* Capability Code */
70#define CAPABILITY_CODE_MP              1 /* Multiprotocol Extensions */
71#define CAPABILITY_CODE_REFRESH         2 /* Route Refresh Capability */
72#define CAPABILITY_CODE_ORF             3 /* Cooperative Route Filtering Capability */
73#define CAPABILITY_CODE_RESTART        64 /* Graceful Restart Capability */
74#define CAPABILITY_CODE_AS4            65 /* 4-octet AS number Capability */
75#define CAPABILITY_CODE_DYNAMIC        66 /* Dynamic Capability */
76#define CAPABILITY_CODE_REFRESH_OLD   128 /* Route Refresh Capability(cisco) */
77#define CAPABILITY_CODE_ORF_OLD       130 /* Cooperative Route Filtering Capability(cisco) */
78
79/* Capability Length */
80#define CAPABILITY_CODE_MP_LEN          4
81#define CAPABILITY_CODE_REFRESH_LEN     0
82#define CAPABILITY_CODE_DYNAMIC_LEN     0
83#define CAPABILITY_CODE_RESTART_LEN     2 /* Receiving only case */
84#define CAPABILITY_CODE_AS4_LEN         4
85
86/* Cooperative Route Filtering Capability.  */
87
88/* ORF Type */
89#define ORF_TYPE_PREFIX                64
90#define ORF_TYPE_PREFIX_OLD           128
91
92/* ORF Mode */
93#define ORF_MODE_RECEIVE                1
94#define ORF_MODE_SEND                   2
95#define ORF_MODE_BOTH                   3
96
97/* Capability Message Action.  */
98#define CAPABILITY_ACTION_SET           0
99#define CAPABILITY_ACTION_UNSET         1
100
101/* Graceful Restart */
102#define RESTART_R_BIT              0x8000
103#define RESTART_F_BIT              0x80
104
105extern int bgp_open_option_parse (struct peer *, u_char, int *);
106extern void bgp_open_capability (struct stream *, struct peer *);
107extern void bgp_capability_vty_out (struct vty *, struct peer *);
108extern as_t peek_for_as4_capability (struct peer *, u_char);
109extern int bgp_afi_safi_valid_indices (afi_t, safi_t *);
110
111#endif /* _QUAGGA_BGP_OPEN_H */
112