blob: 6b150ec1a8aa995fb8891a99baa393518bf90aad [file] [log] [blame]
/*
* Copyright (C) Tildeslash Ltd. All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
*
* You must obey the GNU Affero General Public License in all respects
* for all of the code used other than OpenSSL.
*/
#include "config.h"
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <netinet/in.h>
#include <time.h>
#include "protocol.h"
/**
* Check the server response, check the time it returns and accept a
* TIME_TOLERANCE sec delta with the current system time.
*
* This test is based on RFC868. Rdate returns number of seconds since
* 00:00:00 UTC, January 1, 1900.
*
* @file
*/
int check_rdate(Socket_T socket) {
/* Offset of 00:00:00 UTC, January 1, 1970 from 00:00:00 UTC, January 1, 1900 */
#define TIME_OFFSET 2208988800UL
#define TIME_TOLERANCE (time_t)3
time_t delta;
time_t rdatet;
time_t systemt;
ASSERT(socket);
if(socket_read(socket,(char*) &rdatet, sizeof(time_t)) <= 0) {
socket_setError(socket, "RDATE: error receiving data -- %s\n", STRERROR);
return FALSE;
}
/* Get remote time and substract offset to allow unix time comparision */
rdatet = ntohl(rdatet) - TIME_OFFSET;
if((systemt = time(NULL)) == -1) {
socket_setError(socket, "RDATE error: cannot get system time -- %s\n", STRERROR);
return FALSE;
}
if(rdatet >= systemt)
delta = (rdatet-systemt);
else
delta= (systemt-rdatet);
if(delta > TIME_TOLERANCE) {
socket_setError(socket, "RDATE error: time does not match system time -- %s\n", STRERROR);
return FALSE;
}
return TRUE;
}