1c8589fa8f27e611faeda05ff1a869904e9b4769
2 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
30 * Copyright (c) 1988 by Sun Microsystems, Inc.
35 * rtime - get time from remote machine
37 * gets time, obtaining value from host
38 * on the udp/time socket. Since timeserver returns
39 * with time of day in seconds since Jan 1, 1900, must
40 * subtract seconds before Jan 1, 1970 to get
44 //#include <pthread.h>
49 #include <sys/types.h>
50 //#include <sys/socket.h>
51 //#include <sys/time.h>
52 //#include <netinet/in.h>
55 //#include <sys/select.h>
57 extern int _rpc_dtablesize( void );
59 #define NYEARS (unsigned long)(1970 - 1900)
60 #define TOFFSET (unsigned long)(60*60*24*(365*NYEARS + (NYEARS/4)))
63 static void do_close( SOCKET
);
65 static void do_close( int );
69 rtime(addrp
, timep
, timeout
)
70 struct sockaddr_in
*addrp
;
71 struct timeval
*timep
;
72 struct timeval
*timeout
;
77 unsigned long thetime
;
78 struct sockaddr_in from
;
83 if (timeout
== NULL
) {
88 s
= socket(AF_INET
, type
, 0);
89 if (s
== INVALID_SOCKET
) {
92 addrp
->sin_family
= AF_INET
;
94 /* TCP and UDP port are the same in this case */
95 if ((serv
= getservbyname("time", "tcp")) == NULL
) {
99 addrp
->sin_port
= serv
->s_port
;
101 if (type
== SOCK_DGRAM
) {
102 res
= sendto(s
, (char *)&thetime
, sizeof(thetime
), 0,
103 (struct sockaddr
*)addrp
, sizeof(*addrp
));
104 if (res
== SOCKET_ERROR
) {
111 res
= select(_rpc_dtablesize(), &readfds
,
112 (fd_set
*)NULL
, (fd_set
*)NULL
, timeout
);
113 } while (res
== SOCKET_ERROR
&& WSAGetLastError() == WSAEINTR
);
114 if (res
== 0 || res
== SOCKET_ERROR
) {
116 errno
= WSAETIMEDOUT
;
121 fromlen
= sizeof(from
);
122 res
= recvfrom(s
, (char *)&thetime
, sizeof(thetime
), 0,
123 (struct sockaddr
*)&from
, &fromlen
);
125 if (res
== SOCKET_ERROR
) {
129 if (connect(s
, (struct sockaddr
*)addrp
, sizeof(*addrp
)) == SOCKET_ERROR
) {
133 res
= recv(s
, (char *)&thetime
, sizeof(thetime
), 0);
135 if (res
== SOCKET_ERROR
) {
139 if (res
!= sizeof(thetime
)) {
143 thetime
= ntohl(thetime
);
144 timep
->tv_sec
= thetime
- TOFFSET
;
156 (void)closesocket(s
);