1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* $OpenBSD: session.h,v 1.76 2005/04/05 17:37:44 henning Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <time.h>
#define MAX_BACKLOG 5
#define INTERVAL_CONNECTRETRY 120
#define INTERVAL_HOLD_INITIAL 240
#define INTERVAL_HOLD 90
#define INTERVAL_IDLE_HOLD_INITIAL 30
#define INTERVAL_HOLD_CLONED 3600
#define MAX_IDLE_HOLD 3600
#define MSGSIZE_HEADER 19
#define MSGSIZE_HEADER_MARKER 16
#define MSGSIZE_NOTIFICATION_MIN 21 /* 19 hdr + 1 code + 1 sub */
#define MSGSIZE_OPEN_MIN 29
#define MSGSIZE_UPDATE_MIN 23
#define MSGSIZE_KEEPALIVE MSGSIZE_HEADER
#define MSGSIZE_RREFRESH MSGSIZE_HEADER + 4
#define MSG_PROCESS_LIMIT 25
enum session_state {
STATE_NONE,
STATE_IDLE,
STATE_CONNECT,
STATE_ACTIVE,
STATE_OPENSENT,
STATE_OPENCONFIRM,
STATE_ESTABLISHED
};
enum session_events {
EVNT_NONE,
EVNT_START,
EVNT_STOP,
EVNT_CON_OPEN,
EVNT_CON_CLOSED,
EVNT_CON_OPENFAIL,
EVNT_CON_FATAL,
EVNT_TIMER_CONNRETRY,
EVNT_TIMER_HOLDTIME,
EVNT_TIMER_KEEPALIVE,
EVNT_RCVD_OPEN,
EVNT_RCVD_KEEPALIVE,
EVNT_RCVD_UPDATE,
EVNT_RCVD_NOTIFICATION
};
enum blockmodes {
BM_NORMAL,
BM_NONBLOCK
};
enum msg_type {
OPEN = 1,
UPDATE,
NOTIFICATION,
KEEPALIVE,
RREFRESH
};
enum suberr_header {
ERR_HDR_SYNC = 1,
ERR_HDR_LEN,
ERR_HDR_TYPE
};
enum suberr_open {
ERR_OPEN_VERSION = 1,
ERR_OPEN_AS,
ERR_OPEN_BGPID,
ERR_OPEN_OPT,
ERR_OPEN_AUTH,
ERR_OPEN_HOLDTIME,
ERR_OPEN_CAPA
};
enum opt_params {
OPT_PARAM_NONE,
OPT_PARAM_AUTH,
OPT_PARAM_CAPABILITIES
};
enum capa_codes {
CAPA_NONE,
CAPA_MP,
CAPA_REFRESH
};
struct msg_header {
u_char marker[MSGSIZE_HEADER_MARKER];
u_int16_t len;
u_int8_t type;
};
struct msg_open {
struct msg_header header;
u_int32_t bgpid;
u_int16_t myas;
u_int16_t holdtime;
u_int8_t version;
u_int8_t optparamlen;
};
struct bgpd_sysdep {
u_int8_t no_pfkey;
u_int8_t no_md5sig;
};
struct ctl_conn {
TAILQ_ENTRY(ctl_conn) entry;
struct imsgbuf ibuf;
};
TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns;
struct peer_stats {
u_int64_t msg_rcvd_open;
u_int64_t msg_rcvd_update;
u_int64_t msg_rcvd_notification;
u_int64_t msg_rcvd_keepalive;
u_int64_t msg_rcvd_rrefresh;
u_int64_t msg_sent_open;
u_int64_t msg_sent_update;
u_int64_t msg_sent_notification;
u_int64_t msg_sent_keepalive;
u_int64_t msg_sent_rrefresh;
time_t last_updown;
time_t last_read;
u_int32_t prefix_cnt;
};
struct peer {
struct peer_config conf;
struct peer_stats stats;
struct {
struct capabilities ann;
struct capabilities peer;
} capa;
struct sockaddr_storage sa_local;
struct sockaddr_storage sa_remote;
struct msgbuf wbuf;
struct buf_read *rbuf;
struct peer *next;
time_t ConnectRetryTimer;
time_t KeepaliveTimer;
time_t HoldTimer;
time_t IdleHoldTimer;
time_t IdleHoldResetTimer;
int fd;
int lasterr;
u_int IdleHoldTime;
u_int32_t remote_bgpid;
enum session_state state;
enum session_state prev_state;
u_int16_t holdtime;
u_int8_t auth_established;
u_int8_t depend_ok;
};
struct peer *peers;
/* session.c */
void session_socket_blockmode(int, enum blockmodes);
pid_t session_main(struct bgpd_config *, struct peer *,
struct network_head *, struct filter_head *,
struct mrt_head *, int[2], int[2], int[2]);
void bgp_fsm(struct peer *, enum session_events);
struct peer *getpeerbyaddr(struct bgpd_addr *);
struct peer *getpeerbydesc(const char *);
int imsg_compose_parent(int, pid_t, void *, u_int16_t);
int imsg_compose_rde(int, pid_t, void *, u_int16_t);
/* log.c */
void log_statechange(struct peer *, enum session_state,
enum session_events);
void log_notification(const struct peer *, u_int8_t, u_int8_t,
u_char *, u_int16_t);
void log_conn_attempt(const struct peer *, struct sockaddr *);
const char * log_sockaddr(struct sockaddr *);
/* parse.y */
int parse_config(char *, struct bgpd_config *, struct mrt_head *,
struct peer **, struct network_head *, struct filter_head *);
/* config.c */
int merge_config(struct bgpd_config *, struct bgpd_config *,
struct peer *, struct listen_addrs *);
void prepare_listeners(struct bgpd_config *);
/* rde.c */
pid_t rde_main(struct bgpd_config *, struct peer *, struct network_head *,
struct filter_head *, struct mrt_head *, int[2], int[2], int[2]);
/* control.c */
int control_listen(void);
void control_shutdown(void);
int control_dispatch_msg(struct pollfd *, u_int *);
int control_accept(int);
/* pfkey.c */
int pfkey_establish(struct peer *);
int pfkey_remove(struct peer *);
int pfkey_init(struct bgpd_sysdep *);
/* printconf.c */
void print_config(struct bgpd_config *, struct network_head *, struct peer *,
struct filter_head *, struct mrt_head *);
|