1/* BGP advertisement and adjacency
2   Copyright (C) 1996, 97, 98, 99, 2000 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_ADVERTISE_H
22#define _QUAGGA_BGP_ADVERTISE_H
23
24/* BGP advertise attribute.  */
25struct bgp_advertise_attr
26{
27  /* Head of advertisement pointer. */
28  struct bgp_advertise *adv;
29
30  /* Reference counter.  */
31  unsigned long refcnt;
32
33  /* Attribute pointer to be announced.  */
34  struct attr *attr;
35};
36
37struct bgp_advertise
38{
39  /* FIFO for advertisement.  */
40  struct fifo fifo;
41
42  /* Link list for same attribute advertise.  */
43  struct bgp_advertise *next;
44  struct bgp_advertise *prev;
45
46  /* Prefix information.  */
47  struct bgp_node *rn;
48
49  /* Reference pointer.  */
50  struct bgp_adj_out *adj;
51
52  /* Advertisement attribute.  */
53  struct bgp_advertise_attr *baa;
54
55  /* BGP info.  */
56  struct bgp_info *binfo;
57};
58
59/* BGP adjacency out.  */
60struct bgp_adj_out
61{
62  /* Lined list pointer.  */
63  struct bgp_adj_out *next;
64  struct bgp_adj_out *prev;
65
66  /* Advertised peer.  */
67  struct peer *peer;
68
69  /* Advertised attribute.  */
70  struct attr *attr;
71
72  /* Advertisement information.  */
73  struct bgp_advertise *adv;
74};
75
76/* BGP adjacency in. */
77struct bgp_adj_in
78{
79  /* Linked list pointer.  */
80  struct bgp_adj_in *next;
81  struct bgp_adj_in *prev;
82
83  /* Received peer.  */
84  struct peer *peer;
85
86  /* Received attribute.  */
87  struct attr *attr;
88};
89
90/* BGP advertisement list.  */
91struct bgp_synchronize
92{
93  struct fifo update;
94  struct fifo withdraw;
95  struct fifo withdraw_low;
96};
97
98#define BGP_ADV_FIFO_HEAD(F) ((struct bgp_advertise *)FIFO_HEAD(F))
99
100/* BGP adjacency linked list.  */
101#define BGP_INFO_ADD(N,A,TYPE)                        \
102  do {                                                \
103    (A)->prev = NULL;                                 \
104    (A)->next = (N)->TYPE;                            \
105    if ((N)->TYPE)                                    \
106      (N)->TYPE->prev = (A);                          \
107    (N)->TYPE = (A);                                  \
108  } while (0)
109
110#define BGP_INFO_DEL(N,A,TYPE)                        \
111  do {                                                \
112    if ((A)->next)                                    \
113      (A)->next->prev = (A)->prev;                    \
114    if ((A)->prev)                                    \
115      (A)->prev->next = (A)->next;                    \
116    else                                              \
117      (N)->TYPE = (A)->next;                          \
118  } while (0)
119
120#define BGP_ADJ_IN_ADD(N,A)    BGP_INFO_ADD(N,A,adj_in)
121#define BGP_ADJ_IN_DEL(N,A)    BGP_INFO_DEL(N,A,adj_in)
122#define BGP_ADJ_OUT_ADD(N,A)   BGP_INFO_ADD(N,A,adj_out)
123#define BGP_ADJ_OUT_DEL(N,A)   BGP_INFO_DEL(N,A,adj_out)
124
125/* Prototypes.  */
126extern void bgp_adj_out_set (struct bgp_node *, struct peer *, struct prefix *,
127		      struct attr *, afi_t, safi_t, struct bgp_info *);
128extern void bgp_adj_out_unset (struct bgp_node *, struct peer *, struct prefix *,
129			afi_t, safi_t);
130extern void bgp_adj_out_remove (struct bgp_node *, struct bgp_adj_out *,
131			 struct peer *, afi_t, safi_t);
132extern int bgp_adj_out_lookup (struct peer *, struct prefix *, afi_t, safi_t,
133			struct bgp_node *);
134
135extern void bgp_adj_in_set (struct bgp_node *, struct peer *, struct attr *);
136extern void bgp_adj_in_unset (struct bgp_node *, struct peer *);
137extern void bgp_adj_in_remove (struct bgp_node *, struct bgp_adj_in *);
138
139extern struct bgp_advertise *
140bgp_advertise_clean (struct peer *, struct bgp_adj_out *, afi_t, safi_t);
141
142extern void bgp_sync_init (struct peer *);
143extern void bgp_sync_delete (struct peer *);
144
145#endif /* _QUAGGA_BGP_ADVERTISE_H */
146