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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* $OpenBSD: ntpd.h,v 1.61 2005/09/24 00:32:03 dtucker 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 MIND, 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/uio.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdarg.h>
#include "ntp.h"
#define NTPD_USER "_ntp"
#define CONFFILE "/etc/ntpd.conf"
#define READ_BUF_SIZE 4096
#define NTPD_OPT_VERBOSE 0x0001
#define NTPD_OPT_VERBOSE2 0x0002
#define INTERVAL_QUERY_NORMAL 30 /* sync to peers every n secs */
#define INTERVAL_QUERY_PATHETIC 60
#define INTERVAL_QUERY_AGRESSIVE 5
#define TRUSTLEVEL_BADPEER 6
#define TRUSTLEVEL_PATHETIC 2
#define TRUSTLEVEL_AGRESSIVE 8
#define TRUSTLEVEL_MAX 10
#define MAX_SERVERS_DNS 8
#define QSCALE_OFF_MIN 0.05
#define QSCALE_OFF_MAX 0.50
#define QUERYTIME_MAX 15 /* single query might take n secs max */
#define OFFSET_ARRAY_SIZE 8
#define SETTIME_MIN_OFFSET 180 /* min offset for settime at start */
#define SETTIME_TIMEOUT 15 /* max seconds to wait with -s */
#define LOG_NEGLIGEE 128 /* negligible drift to not log (ms) */
enum client_state {
STATE_NONE,
STATE_DNS_INPROGRESS,
STATE_DNS_TEMPFAIL,
STATE_DNS_DONE,
STATE_QUERY_SENT,
STATE_REPLY_RECEIVED
};
struct listen_addr {
TAILQ_ENTRY(listen_addr) entry;
struct sockaddr_storage sa;
int fd;
};
struct ntp_addr {
struct ntp_addr *next;
struct sockaddr_storage ss;
};
struct ntp_addr_wrap {
char *name;
struct ntp_addr *a;
u_int8_t pool;
};
struct ntp_status {
double rootdelay;
double rootdispersion;
double reftime;
u_int32_t refid;
u_int32_t refid4;
u_int8_t synced;
u_int8_t leap;
int8_t precision;
u_int8_t poll;
u_int8_t stratum;
};
struct ntp_offset {
struct ntp_status status;
double offset;
double delay;
double error;
time_t rcvd;
u_int8_t good;
};
struct ntp_peer {
TAILQ_ENTRY(ntp_peer) entry;
struct ntp_addr_wrap addr_head;
struct ntp_addr *addr;
struct ntp_query *query;
struct ntp_offset reply[OFFSET_ARRAY_SIZE];
struct ntp_offset update;
enum client_state state;
time_t next;
time_t deadline;
u_int32_t id;
u_int8_t shift;
u_int8_t trustlevel;
int lasterror;
};
struct ntpd_conf {
TAILQ_HEAD(listen_addrs, listen_addr) listen_addrs;
TAILQ_HEAD(ntp_peers, ntp_peer) ntp_peers;
struct ntp_status status;
u_int8_t listen_all;
u_int8_t settime;
u_int8_t debug;
u_int32_t scale;
};
struct buf {
TAILQ_ENTRY(buf) entry;
u_char *buf;
size_t size;
size_t wpos;
size_t rpos;
};
struct msgbuf {
TAILQ_HEAD(, buf) bufs;
u_int32_t queued;
int fd;
};
struct buf_read {
size_t wpos;
u_char buf[READ_BUF_SIZE];
u_char *rptr;
};
/* ipc messages */
#define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
#define MAX_IMSGSIZE 8192
struct imsgbuf {
int fd;
pid_t pid;
struct buf_read r;
struct msgbuf w;
};
enum imsg_type {
IMSG_NONE,
IMSG_ADJTIME,
IMSG_SETTIME,
IMSG_HOST_DNS
};
struct imsg_hdr {
enum imsg_type type;
u_int32_t peerid;
pid_t pid;
u_int16_t len;
};
struct imsg {
struct imsg_hdr hdr;
void *data;
};
/* prototypes */
/* log.c */
void log_init(int);
void vlog(int, const char *, va_list);
void log_warn(const char *, ...);
void log_warnx(const char *, ...);
void log_info(const char *, ...);
void log_debug(const char *, ...);
void fatal(const char *);
void fatalx(const char *);
const char * log_sockaddr(struct sockaddr *);
/* buffer.c */
struct buf *buf_open(size_t);
int buf_add(struct buf *, void *, size_t);
int buf_close(struct msgbuf *, struct buf *);
void buf_free(struct buf *);
void msgbuf_init(struct msgbuf *);
void msgbuf_clear(struct msgbuf *);
int msgbuf_write(struct msgbuf *);
/* imsg.c */
void imsg_init(struct imsgbuf *, int);
int imsg_read(struct imsgbuf *);
int imsg_get(struct imsgbuf *, struct imsg *);
int imsg_compose(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
void *, u_int16_t);
struct buf *imsg_create(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
u_int16_t);
int imsg_add(struct buf *, void *, u_int16_t);
int imsg_close(struct imsgbuf *, struct buf *);
void imsg_free(struct imsg *);
/* ntp.c */
pid_t ntp_main(int[2], struct ntpd_conf *);
void priv_adjtime(void);
void priv_settime(double);
void priv_host_dns(char *, u_int32_t);
/* parse.y */
int parse_config(const char *, struct ntpd_conf *);
/* config.c */
int host(const char *, struct ntp_addr **);
int host_dns(const char *, struct ntp_addr **);
struct ntp_peer *new_peer(void);
/* ntp_msg.c */
int ntp_getmsg(struct sockaddr *, char *, ssize_t, struct ntp_msg *);
int ntp_sendmsg(int, struct sockaddr *, struct ntp_msg *, ssize_t, int);
/* server.c */
int setup_listeners(struct servent *, struct ntpd_conf *, u_int *);
int ntp_reply(int, struct sockaddr *, struct ntp_msg *, int);
int server_dispatch(int, struct ntpd_conf *);
/* client.c */
int client_peer_init(struct ntp_peer *);
int client_addr_init(struct ntp_peer *);
int client_nextaddr(struct ntp_peer *);
int client_query(struct ntp_peer *);
int client_dispatch(struct ntp_peer *, u_int8_t);
void client_log_error(struct ntp_peer *, const char *, int);
void update_scale(double);
time_t scale_interval(time_t);
time_t error_interval(void);
void set_next(struct ntp_peer *, time_t);
/* util.c */
double gettime(void);
void d_to_tv(double, struct timeval *);
double lfp_to_d(struct l_fixedpt);
struct l_fixedpt d_to_lfp(double);
double sfp_to_d(struct s_fixedpt);
struct s_fixedpt d_to_sfp(double);
|
