diff options
Diffstat (limited to 'sunrpc/rtime.c')
| -rw-r--r-- | sunrpc/rtime.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/sunrpc/rtime.c b/sunrpc/rtime.c new file mode 100644 index 0000000..baaced0 --- /dev/null +++ b/sunrpc/rtime.c @@ -0,0 +1,146 @@ +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)rtime.c 2.2 88/08/10 4.0 RPCSRC; from 1.8 88/02/08 SMI"; +#endif +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ + +/* + * Copyright (c) 1988 by Sun Microsystems, Inc. + */ +/* + * rtime - get time from remote machine + * + * gets time, obtaining value from host + * on the udp/time socket. Since timeserver returns + * with time of day in seconds since Jan 1, 1900, must + * subtract seconds before Jan 1, 1970 to get + * what unix uses. + */ +#include <stdio.h> +#include <unistd.h> +#include <rpc/rpc.h> +#include <rpc/clnt.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/time.h> +#include <rpc/auth_des.h> +#include <errno.h> +#include <netinet/in.h> + +#define NYEARS (u_long)(1970 - 1900) +#define TOFFSET (u_long)(60*60*24*(365*NYEARS + (NYEARS/4))) + +static void do_close (int); + +static void +do_close (int s) +{ + int save; + + save = errno; + close (s); + __set_errno (save); +} + +int +rtime (struct sockaddr_in *addrp, struct timeval *timep, + struct timeval *timeout) +{ + int s; + fd_set readfds; + int res; + unsigned long thetime; + struct sockaddr_in from; + int fromlen; + int type; + + if (timeout == NULL) + type = SOCK_STREAM; + else + type = SOCK_DGRAM; + + s = socket (AF_INET, type, 0); + if (s < 0) + return (-1); + + addrp->sin_family = AF_INET; + addrp->sin_port = htons (IPPORT_TIMESERVER); + if (type == SOCK_DGRAM) + { + res = sendto (s, (char *) &thetime, sizeof (thetime), 0, + (struct sockaddr *) addrp, sizeof (*addrp)); + if (res < 0) + { + do_close (s); + return -1; + } + do + { + FD_ZERO (&readfds); + FD_SET (s, &readfds); + res = select (_rpc_dtablesize (), &readfds, (void *) NULL, + (void *) NULL, timeout); + } + while (res < 0 && errno == EINTR); + if (res <= 0) + { + if (res == 0) + __set_errno (ETIMEDOUT); + do_close (s); + return (-1); + } + fromlen = sizeof (from); + res = recvfrom (s, (char *) &thetime, sizeof (thetime), 0, + (struct sockaddr *) &from, &fromlen); + do_close (s); + if (res < 0) + return -1; + } + else + { + if (connect (s, (struct sockaddr *) addrp, sizeof (*addrp)) < 0) + { + do_close (s); + return -1; + } + res = read (s, (char *) &thetime, sizeof (thetime)); + do_close (s); + if (res < 0) + return (-1); + } + if (res != sizeof (thetime)) + { + __set_errno (EIO); + return -1; + } + thetime = ntohl (thetime); + timep->tv_sec = thetime - TOFFSET; + timep->tv_usec = 0; + return 0; +} |