1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988
32*0Sstevel@tonic-gate * The Regents of the University of California
33*0Sstevel@tonic-gate * All Rights Reserved
34*0Sstevel@tonic-gate *
35*0Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
36*0Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
37*0Sstevel@tonic-gate * contributors.
38*0Sstevel@tonic-gate */
39*0Sstevel@tonic-gate
40*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate /*
43*0Sstevel@tonic-gate * rtime - get time from remote machine
44*0Sstevel@tonic-gate *
45*0Sstevel@tonic-gate * gets time, obtaining value from host
46*0Sstevel@tonic-gate * on the udp/time socket. Since timeserver returns
47*0Sstevel@tonic-gate * with time of day in seconds since Jan 1, 1900, must
48*0Sstevel@tonic-gate * subtract seconds before Jan 1, 1970 to get
49*0Sstevel@tonic-gate * what unix uses.
50*0Sstevel@tonic-gate */
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate #include <sys/types.h>
53*0Sstevel@tonic-gate #include <stdio.h>
54*0Sstevel@tonic-gate #include <string.h>
55*0Sstevel@tonic-gate #include <sys/socket.h>
56*0Sstevel@tonic-gate #include <sys/time.h>
57*0Sstevel@tonic-gate #include <errno.h>
58*0Sstevel@tonic-gate #include <netinet/in.h>
59*0Sstevel@tonic-gate #include <malloc.h>
60*0Sstevel@tonic-gate
61*0Sstevel@tonic-gate #define NYEARS (1970 - 1900)
62*0Sstevel@tonic-gate #define TOFFSET ((uint_t)60*60*24*(365*NYEARS + (NYEARS/4)))
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate extern int _socket(int, int, int);
65*0Sstevel@tonic-gate extern int _sendto(int, const char *, int, int,
66*0Sstevel@tonic-gate const struct sockaddr *, int);
67*0Sstevel@tonic-gate extern int _recvfrom(int, char *, int, int,
68*0Sstevel@tonic-gate struct sockaddr *, int *);
69*0Sstevel@tonic-gate extern int _connect(int, struct sockaddr *, int);
70*0Sstevel@tonic-gate extern int __rpc_dtbsize();
71*0Sstevel@tonic-gate extern ssize_t read(int, void *, size_t);
72*0Sstevel@tonic-gate extern int close(int);
73*0Sstevel@tonic-gate static void do_close();
74*0Sstevel@tonic-gate
75*0Sstevel@tonic-gate int
rtime(addrp,timep,timeout)76*0Sstevel@tonic-gate rtime(addrp, timep, timeout)
77*0Sstevel@tonic-gate struct sockaddr_in *addrp;
78*0Sstevel@tonic-gate struct timeval *timep;
79*0Sstevel@tonic-gate struct timeval *timeout;
80*0Sstevel@tonic-gate {
81*0Sstevel@tonic-gate int s;
82*0Sstevel@tonic-gate fd_set readfds;
83*0Sstevel@tonic-gate int res;
84*0Sstevel@tonic-gate uint_t thetime;
85*0Sstevel@tonic-gate struct sockaddr_in from;
86*0Sstevel@tonic-gate int fromlen;
87*0Sstevel@tonic-gate int type;
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate if (timeout == NULL) {
90*0Sstevel@tonic-gate type = SOCK_STREAM;
91*0Sstevel@tonic-gate } else {
92*0Sstevel@tonic-gate type = SOCK_DGRAM;
93*0Sstevel@tonic-gate }
94*0Sstevel@tonic-gate s = _socket(AF_INET, type, 0);
95*0Sstevel@tonic-gate if (s < 0) {
96*0Sstevel@tonic-gate return (-1);
97*0Sstevel@tonic-gate }
98*0Sstevel@tonic-gate addrp->sin_family = AF_INET;
99*0Sstevel@tonic-gate addrp->sin_port = htons(IPPORT_TIMESERVER);
100*0Sstevel@tonic-gate if (type == SOCK_DGRAM) {
101*0Sstevel@tonic-gate res = _sendto(s, (char *)&thetime, sizeof (thetime), 0,
102*0Sstevel@tonic-gate (struct sockaddr *)addrp, sizeof (*addrp));
103*0Sstevel@tonic-gate if (res < 0) {
104*0Sstevel@tonic-gate do_close(s);
105*0Sstevel@tonic-gate return (-1);
106*0Sstevel@tonic-gate }
107*0Sstevel@tonic-gate do {
108*0Sstevel@tonic-gate FD_ZERO(&readfds);
109*0Sstevel@tonic-gate FD_SET(s, &readfds);
110*0Sstevel@tonic-gate res = select(__rpc_dtbsize(), &readfds, NULL,
111*0Sstevel@tonic-gate NULL, timeout);
112*0Sstevel@tonic-gate } while (res < 0 && errno == EINTR);
113*0Sstevel@tonic-gate if (res <= 0) {
114*0Sstevel@tonic-gate if (res == 0) {
115*0Sstevel@tonic-gate errno = ETIMEDOUT;
116*0Sstevel@tonic-gate }
117*0Sstevel@tonic-gate do_close(s);
118*0Sstevel@tonic-gate return (-1);
119*0Sstevel@tonic-gate }
120*0Sstevel@tonic-gate fromlen = sizeof (from);
121*0Sstevel@tonic-gate res = _recvfrom(s, (char *)&thetime, sizeof (thetime), 0,
122*0Sstevel@tonic-gate (struct sockaddr *)&from, &fromlen);
123*0Sstevel@tonic-gate do_close(s);
124*0Sstevel@tonic-gate if (res < 0) {
125*0Sstevel@tonic-gate return (-1);
126*0Sstevel@tonic-gate }
127*0Sstevel@tonic-gate } else {
128*0Sstevel@tonic-gate if (_connect(s, (struct sockaddr *)addrp,
129*0Sstevel@tonic-gate sizeof (*addrp)) < 0) {
130*0Sstevel@tonic-gate do_close(s);
131*0Sstevel@tonic-gate return (-1);
132*0Sstevel@tonic-gate }
133*0Sstevel@tonic-gate res = read(s, (char *)&thetime, sizeof (thetime));
134*0Sstevel@tonic-gate do_close(s);
135*0Sstevel@tonic-gate if (res < 0) {
136*0Sstevel@tonic-gate return (-1);
137*0Sstevel@tonic-gate }
138*0Sstevel@tonic-gate }
139*0Sstevel@tonic-gate if (res != sizeof (thetime)) {
140*0Sstevel@tonic-gate errno = EIO;
141*0Sstevel@tonic-gate return (-1);
142*0Sstevel@tonic-gate }
143*0Sstevel@tonic-gate thetime = ntohl(thetime);
144*0Sstevel@tonic-gate
145*0Sstevel@tonic-gate thetime = thetime - TOFFSET;
146*0Sstevel@tonic-gate #ifdef _ILP32
147*0Sstevel@tonic-gate if (thetime > INT32_MAX)
148*0Sstevel@tonic-gate thetime = INT32_MAX;
149*0Sstevel@tonic-gate #endif
150*0Sstevel@tonic-gate timep->tv_sec = thetime;
151*0Sstevel@tonic-gate timep->tv_usec = 0;
152*0Sstevel@tonic-gate return (0);
153*0Sstevel@tonic-gate }
154*0Sstevel@tonic-gate
155*0Sstevel@tonic-gate static void
do_close(s)156*0Sstevel@tonic-gate do_close(s)
157*0Sstevel@tonic-gate int s;
158*0Sstevel@tonic-gate {
159*0Sstevel@tonic-gate int save;
160*0Sstevel@tonic-gate
161*0Sstevel@tonic-gate save = errno;
162*0Sstevel@tonic-gate (void) close(s);
163*0Sstevel@tonic-gate errno = save;
164*0Sstevel@tonic-gate }
165