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
|
/* $OpenBSD: ntp_msg.c,v 1.9 2004/10/13 13:35:19 henning Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2004 Alexander Guy <alexander.guy@andern.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/param.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "ntpd.h"
#include "ntp.h"
int
ntp_getmsg(char *p, ssize_t len, struct ntp_msg *msg)
{
if (len != NTP_MSGSIZE_NOAUTH && len != NTP_MSGSIZE) {
log_warnx("malformed packet received");
return (-1);
}
memcpy(&msg->status, p, sizeof(msg->status));
p += sizeof(msg->status);
memcpy(&msg->stratum, p, sizeof(msg->stratum));
p += sizeof(msg->stratum);
memcpy(&msg->ppoll, p, sizeof(msg->ppoll));
p += sizeof(msg->ppoll);
memcpy(&msg->precision, p, sizeof(msg->precision));
p += sizeof(msg->precision);
memcpy(&msg->rootdelay.int_part, p, sizeof(msg->rootdelay.int_part));
p += sizeof(msg->rootdelay.int_part);
memcpy(&msg->rootdelay.fraction, p, sizeof(msg->rootdelay.fraction));
p += sizeof(msg->rootdelay.fraction);
memcpy(&msg->dispersion.int_part, p, sizeof(msg->dispersion.int_part));
p += sizeof(msg->dispersion.int_part);
memcpy(&msg->dispersion.fraction, p, sizeof(msg->dispersion.fraction));
p += sizeof(msg->dispersion.fraction);
memcpy(&msg->refid, p, sizeof(msg->refid));
p += sizeof(msg->refid);
memcpy(&msg->reftime.int_part, p, sizeof(msg->reftime.int_part));
p += sizeof(msg->reftime.int_part);
memcpy(&msg->reftime.fraction, p, sizeof(msg->reftime.fraction));
p += sizeof(msg->reftime.fraction);
memcpy(&msg->orgtime.int_part, p, sizeof(msg->orgtime.int_part));
p += sizeof(msg->orgtime.int_part);
memcpy(&msg->orgtime.fraction, p, sizeof(msg->orgtime.fraction));
p += sizeof(msg->orgtime.fraction);
memcpy(&msg->rectime.int_part, p, sizeof(msg->rectime.int_part));
p += sizeof(msg->rectime.int_part);
memcpy(&msg->rectime.fraction, p, sizeof(msg->rectime.fraction));
p += sizeof(msg->rectime.fraction);
memcpy(&msg->xmttime.int_part, p, sizeof(msg->xmttime.int_part));
p += sizeof(msg->xmttime.int_part);
memcpy(&msg->xmttime.fraction, p, sizeof(msg->xmttime.fraction));
p += sizeof(msg->xmttime.fraction);
return (0);
}
int
ntp_sendmsg(int fd, struct sockaddr *sa, struct ntp_msg *msg, ssize_t len,
int auth)
{
char buf[NTP_MSGSIZE];
char *p;
u_int8_t sa_len;
p = buf;
memcpy(p, &msg->status, sizeof(msg->status));
p += sizeof(msg->status);
memcpy(p, &msg->stratum, sizeof(msg->stratum));
p += sizeof(msg->stratum);
memcpy(p, &msg->ppoll, sizeof(msg->ppoll));
p += sizeof(msg->ppoll);
memcpy(p, &msg->precision, sizeof(msg->precision));
p += sizeof(msg->precision);
memcpy(p, &msg->rootdelay.int_part, sizeof(msg->rootdelay.int_part));
p += sizeof(msg->rootdelay.int_part);
memcpy(p, &msg->rootdelay.fraction, sizeof(msg->rootdelay.fraction));
p += sizeof(msg->rootdelay.fraction);
memcpy(p, &msg->dispersion.int_part, sizeof(msg->dispersion.int_part));
p += sizeof(msg->dispersion.int_part);
memcpy(p, &msg->dispersion.fraction, sizeof(msg->dispersion.fraction));
p += sizeof(msg->dispersion.fraction);
memcpy(p, &msg->refid, sizeof(msg->refid));
p += sizeof(msg->refid);
memcpy(p, &msg->reftime.int_part, sizeof(msg->reftime.int_part));
p += sizeof(msg->reftime.int_part);
memcpy(p, &msg->reftime.fraction, sizeof(msg->reftime.fraction));
p += sizeof(msg->reftime.fraction);
memcpy(p, &msg->orgtime.int_part, sizeof(msg->orgtime.int_part));
p += sizeof(msg->orgtime.int_part);
memcpy(p, &msg->orgtime.fraction, sizeof(msg->orgtime.fraction));
p += sizeof(msg->orgtime.fraction);
memcpy(p, &msg->rectime.int_part, sizeof(msg->rectime.int_part));
p += sizeof(msg->rectime.int_part);
memcpy(p, &msg->rectime.fraction, sizeof(msg->rectime.fraction));
p += sizeof(msg->rectime.fraction);
memcpy(p, &msg->xmttime.int_part, sizeof(msg->xmttime.int_part));
p += sizeof(msg->xmttime.int_part);
memcpy(p, &msg->xmttime.fraction, sizeof(msg->xmttime.fraction));
p += sizeof(msg->xmttime.fraction);
if (sa != NULL)
sa_len = SA_LEN(sa);
else
sa_len = 0;
if (sendto(fd, &buf, len, 0, sa, sa_len) != len) {
if (errno == ENOBUFS || errno == EHOSTUNREACH ||
errno == ENETDOWN || errno == EHOSTDOWN) {
/* logging is futile */
return (-1);
}
log_warn("sendto");
return (-1);
}
return (0);
}
|
