source: rtems/cpukit/librpc/src/rpc/rtime.c @ 6f07dbc

4.104.114.84.9
Last change on this file since 6f07dbc was 6f07dbc, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 28, 2002 at 1:50:14 PM

2002-10-28 Joel Sherrill <joel@…>

  • src/rpc/clnt_tcp.c, src/rpc/clnt_udp.c, src/rpc/pmap_rmt.c, src/rpc/rtime.c, src/rpc/svc_tcp.c: Add include of <sys/select.h> to eliminate warning.
  • src/rpc/rpcdname.c: Add prototype of getdomainname() to eliminate warning.
  • Property mode set to 100644
File size: 3.9 KB
Line 
1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
20 *
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29
30/*
31 * Copyright (c) 1988 by Sun Microsystems, Inc.
32
33 */
34
35/*
36 * rtime - get time from remote machine
37 *
38 * gets time, obtaining value from host
39 * on the udp/time socket.  Since timeserver returns
40 * with time of day in seconds since Jan 1, 1900,  must
41 * subtract seconds before Jan 1, 1970 to get
42 * what unix uses.
43 */
44#include <stdlib.h>
45#include <string.h>
46#include <unistd.h>
47#include <errno.h>
48#include <sys/types.h>
49#include <sys/socket.h>
50#include <sys/time.h>
51#include <netinet/in.h>
52#include <stdio.h>
53#include <netdb.h>
54#include <sys/select.h>
55
56#if defined(LIBC_SCCS) && !defined(lint)
57/* from: static char sccsid[] =         "@(#)rtime.c    2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI"; */
58static const char rcsid[] = "$FreeBSD: src/lib/libc/rpc/rtime.c,v 1.5 2000/01/27 23:06:41 jasone Exp $";
59#endif
60
61extern int _rpc_dtablesize __P(( void ));
62
63#define NYEARS  (unsigned long)(1970 - 1900)
64#define TOFFSET (unsigned long)(60*60*24*(365*NYEARS + (NYEARS/4)))
65
66static void do_close __P(( int ));
67
68int
69rtime(addrp, timep, timeout)
70        struct sockaddr_in *addrp;
71        struct timeval *timep;
72        struct timeval *timeout;
73{
74        int s;
75        fd_set readfds;
76        int res;
77        unsigned long thetime;
78        struct sockaddr_in from;
79        int fromlen;
80        int type;
81        struct servent *serv;
82
83        if (timeout == NULL) {
84                type = SOCK_STREAM;
85        } else {
86                type = SOCK_DGRAM;
87        }
88        s = socket(AF_INET, type, 0);
89        if (s < 0) {
90                return(-1);
91        }
92        addrp->sin_family = AF_INET;
93
94        /* TCP and UDP port are the same in this case */
95        if ((serv = getservbyname("time", "tcp")) == NULL) {
96                return(-1);
97        }
98
99        addrp->sin_port = serv->s_port;
100
101        if (type == SOCK_DGRAM) {
102                res = sendto(s, (char *)&thetime, sizeof(thetime), 0, 
103                             (struct sockaddr *)addrp, sizeof(*addrp));
104                if (res < 0) {
105                        do_close(s);
106                        return(-1);     
107                }
108                do {
109                        FD_ZERO(&readfds);
110                        FD_SET(s, &readfds);
111                        res = select(_rpc_dtablesize(), &readfds,
112                                     (fd_set *)NULL, (fd_set *)NULL, timeout);
113                } while (res < 0 && errno == EINTR);
114                if (res <= 0) {
115                        if (res == 0) {
116                                errno = ETIMEDOUT;
117                        }
118                        do_close(s);
119                        return(-1);     
120                }
121                fromlen = sizeof(from);
122                res = recvfrom(s, (char *)&thetime, sizeof(thetime), 0, 
123                               (struct sockaddr *)&from, &fromlen);
124                do_close(s);
125                if (res < 0) {
126                        return(-1);     
127                }
128        } else {
129                if (connect(s, (struct sockaddr *)addrp, sizeof(*addrp)) < 0) {
130                        do_close(s);
131                        return(-1);
132                }
133                res = _RPC_read(s, (char *)&thetime, sizeof(thetime));
134                do_close(s);
135                if (res < 0) {
136                        return(-1);
137                }
138        }
139        if (res != sizeof(thetime)) {
140                errno = EIO;
141                return(-1);     
142        }
143        thetime = ntohl(thetime);
144        timep->tv_sec = thetime - TOFFSET;
145        timep->tv_usec = 0;
146        return(0);
147}
148
149static void
150do_close(s)
151        int s;
152{
153        int save;
154
155        save = errno;
156        (void)_RPC_close(s);
157        errno = save;
158}
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