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mirror of https://git.FreeBSD.org/src.git synced 2024-12-05 09:14:03 +00:00
freebsd/contrib/ntp/libntp/machines.c
Gleb Smirnoff 9034852c84 MFV ntp-4.2.8p4 (r289715)
Security:       VuXML: c4a18a12-77fc-11e5-a687-206a8a720317
Security:	CVE-2015-7871
Security:	CVE-2015-7855
Security:	CVE-2015-7854
Security:	CVE-2015-7853
Security:	CVE-2015-7852
Security:	CVE-2015-7851
Security:	CVE-2015-7850
Security:	CVE-2015-7849
Security:	CVE-2015-7848
Security:	CVE-2015-7701
Security:	CVE-2015-7703
Security:	CVE-2015-7704, CVE-2015-7705
Security:	CVE-2015-7691, CVE-2015-7692, CVE-2015-7702
Security:	http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner
Sponsored by:	Nginx, Inc.
2015-10-22 19:42:57 +00:00

534 lines
13 KiB
C

/* machines.c - provide special support for peculiar architectures
*
* Real bummers unite !
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ntp.h"
#include "ntp_machine.h"
#include "ntp_syslog.h"
#include "ntp_stdlib.h"
#include "ntp_unixtime.h"
#include "lib_strbuf.h"
#include "ntp_debug.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef SYS_WINNT
int _getch(void); /* Declare the one function rather than include conio.h */
#else
#ifdef SYS_VXWORKS
#include "taskLib.h"
#include "sysLib.h"
#include "time.h"
#include "ntp_syslog.h"
/* some translations to the world of vxWorkings -casey */
/* first some netdb type things */
#include "ioLib.h"
#include <socket.h>
int h_errno;
struct hostent *gethostbyname(char *name)
{
struct hostent *host1;
h_errno = 0; /* we are always successful!!! */
host1 = (struct hostent *) emalloc (sizeof(struct hostent));
host1->h_name = name;
host1->h_addrtype = AF_INET;
host1->h_aliases = name;
host1->h_length = 4;
host1->h_addr_list[0] = (char *)hostGetByName (name);
host1->h_addr_list[1] = NULL;
return host1;
}
struct hostent *gethostbyaddr(char *name, int size, int addr_type)
{
struct hostent *host1;
h_errno = 0; /* we are always successful!!! */
host1 = (struct hostent *) emalloc (sizeof(struct hostent));
host1->h_name = name;
host1->h_addrtype = AF_INET;
host1->h_aliases = name;
host1->h_length = 4;
host1->h_addr_list = NULL;
return host1;
}
struct servent *getservbyname (char *name, char *type)
{
struct servent *serv1;
serv1 = (struct servent *) emalloc (sizeof(struct servent));
serv1->s_name = "ntp"; /* official service name */
serv1->s_aliases = NULL; /* alias list */
serv1->s_port = 123; /* port # */
serv1->s_proto = "udp"; /* protocol to use */
return serv1;
}
/* second
* vxworks thinks it has insomnia
* we have to sleep for number of seconds
*/
#define CLKRATE sysClkRateGet()
/* I am not sure how valid the granularity is - it is from G. Eger's port */
#define CLK_GRANULARITY 1 /* Granularity of system clock in usec */
/* Used to round down # usecs/tick */
/* On a VCOM-100, PIT gets 8 MHz clk, */
/* & it prescales by 32, thus 4 usec */
/* on mv167, granularity is 1usec anyway*/
/* To defeat rounding, set to 1 */
#define USECS_PER_SEC MILLION /* Microseconds per second */
#define TICK (((USECS_PER_SEC / CLKRATE) / CLK_GRANULARITY) * CLK_GRANULARITY)
/* emulate unix sleep
* casey
*/
void sleep(int seconds)
{
taskDelay(seconds*TICK);
}
/* emulate unix alarm
* that pauses and calls SIGALRM after the seconds are up...
* so ... taskDelay() fudged for seconds should amount to the same thing.
* casey
*/
void alarm (int seconds)
{
sleep(seconds);
}
#endif /* SYS_VXWORKS */
#ifdef SYS_PTX /* Does PTX still need this? */
/*#include <sys/types.h> */
#include <sys/procstats.h>
int
gettimeofday(
struct timeval *tvp
)
{
/*
* hi, this is Sequents sneak path to get to a clock
* this is also the most logical syscall for such a function
*/
return (get_process_stats(tvp, PS_SELF, (struct procstats *) 0,
(struct procstats *) 0));
}
#endif /* SYS_PTX */
#ifdef MPE
/* This is a substitute for bind() that if called for an AF_INET socket
port less than 1024, GETPRIVMODE() and GETUSERMODE() calls will be done. */
#undef bind
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/un.h>
extern void GETPRIVMODE(void);
extern void GETUSERMODE(void);
int __ntp_mpe_bind(int s, void *addr, int addrlen);
int __ntp_mpe_bind(int s, void *addr, int addrlen) {
int priv = 0;
int result;
if (addrlen == sizeof(struct sockaddr_in)) { /* AF_INET */
if (((struct sockaddr_in *)addr)->sin_port > 0 &&
((struct sockaddr_in *)addr)->sin_port < 1024) {
priv = 1;
GETPRIVMODE();
}
/* ((struct sockaddr_in *)addr)->sin_addr.s_addr = 0; */
result = bind(s,addr,addrlen);
if (priv == 1) GETUSERMODE();
} else /* AF_UNIX */
result = bind(s,addr,addrlen);
return result;
}
/*
* MPE stupidly requires sfcntl() to be used on sockets instead of fcntl(),
* so we define a wrapper to analyze the file descriptor and call the correct
* function.
*/
#undef fcntl
#include <errno.h>
#include <fcntl.h>
int __ntp_mpe_fcntl(int fd, int cmd, int arg);
int __ntp_mpe_fcntl(int fd, int cmd, int arg) {
int len;
struct sockaddr sa;
extern int sfcntl(int, int, int);
len = sizeof sa;
if (getsockname(fd, &sa, &len) == -1) {
if (errno == EAFNOSUPPORT) /* AF_UNIX socket */
return sfcntl(fd, cmd, arg);
if (errno == ENOTSOCK) /* file or pipe */
return fcntl(fd, cmd, arg);
return (-1); /* unknown getsockname() failure */
} else /* AF_INET socket */
return sfcntl(fd, cmd, arg);
}
/*
* Setitimer emulation support. Note that we implement this using alarm(),
* and since alarm() only delivers one signal, we must re-enable the alarm
* by enabling our own SIGALRM setitimer_mpe_handler routine to be called
* before the real handler routine and re-enable the alarm at that time.
*
* Note that this solution assumes that sigaction(SIGALRM) is called before
* calling setitimer(). If it should ever to become necessary to support
* sigaction(SIGALRM) after calling setitimer(), it will be necessary to trap
* those sigaction() calls.
*/
#include <limits.h>
#include <signal.h>
/*
* Some global data that needs to be shared between setitimer() and
* setitimer_mpe_handler().
*/
struct {
unsigned long current_msec; /* current alarm() value in effect */
unsigned long interval_msec; /* next alarm() value from setitimer */
unsigned long value_msec; /* first alarm() value from setitimer */
struct itimerval current_itimerval; /* current itimerval in effect */
struct sigaction oldact; /* SIGALRM state saved by setitimer */
} setitimer_mpe_ctx = { 0, 0, 0 };
/*
* Undocumented, unsupported function to do alarm() in milliseconds.
*/
extern unsigned int px_alarm(unsigned long, int *);
/*
* The SIGALRM handler routine enabled by setitimer(). Re-enable the alarm or
* restore the original SIGALRM setting if no more alarms are needed. Then
* call the original SIGALRM handler (if any).
*/
static RETSIGTYPE setitimer_mpe_handler(int sig)
{
int alarm_hpe_status;
/* Update the new current alarm value */
setitimer_mpe_ctx.current_msec = setitimer_mpe_ctx.interval_msec;
if (setitimer_mpe_ctx.interval_msec > 0) {
/* Additional intervals needed; re-arm the alarm timer */
px_alarm(setitimer_mpe_ctx.interval_msec,&alarm_hpe_status);
} else {
/* No more intervals, so restore previous original SIGALRM handler */
sigaction(SIGALRM, &setitimer_mpe_ctx.oldact, NULL);
}
/* Call the original SIGALRM handler if it is a function and not just a flag */
if (setitimer_mpe_ctx.oldact.sa_handler != SIG_DFL &&
setitimer_mpe_ctx.oldact.sa_handler != SIG_ERR &&
setitimer_mpe_ctx.oldact.sa_handler != SIG_IGN)
(*setitimer_mpe_ctx.oldact.sa_handler)(SIGALRM);
}
/*
* Our implementation of setitimer().
*/
int
setitimer(int which, struct itimerval *value,
struct itimerval *ovalue)
{
int alarm_hpe_status;
unsigned long remaining_msec, value_msec, interval_msec;
struct sigaction newact;
/*
* Convert the initial interval to milliseconds
*/
if (value->it_value.tv_sec > (UINT_MAX / 1000))
value_msec = UINT_MAX;
else
value_msec = value->it_value.tv_sec * 1000;
value_msec += value->it_value.tv_usec / 1000;
/*
* Convert the reset interval to milliseconds
*/
if (value->it_interval.tv_sec > (UINT_MAX / 1000))
interval_msec = UINT_MAX;
else
interval_msec = value->it_interval.tv_sec * 1000;
interval_msec += value->it_interval.tv_usec / 1000;
if (value_msec > 0 && interval_msec > 0) {
/*
* We'll be starting an interval timer that will be repeating, so we need to
* insert our own SIGALRM signal handler to schedule the repeats.
*/
/* Read the current SIGALRM action */
if (sigaction(SIGALRM, NULL, &setitimer_mpe_ctx.oldact) < 0) {
fprintf(stderr,"MPE setitimer old handler failed, errno=%d\n",errno);
return -1;
}
/* Initialize the new action to call our SIGALRM handler instead */
newact.sa_handler = &setitimer_mpe_handler;
newact.sa_mask = setitimer_mpe_ctx.oldact.sa_mask;
newact.sa_flags = setitimer_mpe_ctx.oldact.sa_flags;
if (sigaction(SIGALRM, &newact, NULL) < 0) {
fprintf(stderr,"MPE setitimer new handler failed, errno=%d\n",errno);
return -1;
}
}
/*
* Return previous itimerval if desired
*/
if (ovalue != NULL) *ovalue = setitimer_mpe_ctx.current_itimerval;
/*
* Save current parameters for later usage
*/
setitimer_mpe_ctx.current_itimerval = *value;
setitimer_mpe_ctx.current_msec = value_msec;
setitimer_mpe_ctx.value_msec = value_msec;
setitimer_mpe_ctx.interval_msec = interval_msec;
/*
* Schedule the first alarm
*/
remaining_msec = px_alarm(value_msec, &alarm_hpe_status);
if (alarm_hpe_status == 0)
return (0);
else
return (-1);
}
/*
* MPE lacks gettimeofday(), so we define our own.
*/
int gettimeofday(struct timeval *tvp)
{
/* Documented, supported MPE functions. */
extern void GETPRIVMODE(void);
extern void GETUSERMODE(void);
/* Undocumented, unsupported MPE functions. */
extern long long get_time(void);
extern void get_time_change_info(long long *, char *, char *);
extern long long ticks_to_micro(long long);
char pwf_since_boot, recover_pwf_time;
long long mpetime, offset_ticks, offset_usec;
GETPRIVMODE();
mpetime = get_time(); /* MPE local time usecs since Jan 1 1970 */
get_time_change_info(&offset_ticks, &pwf_since_boot, &recover_pwf_time);
offset_usec = ticks_to_micro(offset_ticks); /* UTC offset usecs */
GETUSERMODE();
mpetime = mpetime - offset_usec; /* Convert from local time to UTC */
tvp->tv_sec = mpetime / 1000000LL;
tvp->tv_usec = mpetime % 1000000LL;
return 0;
}
/*
* MPE lacks settimeofday(), so we define our own.
*/
#define HAVE_SETTIMEOFDAY
int settimeofday(struct timeval *tvp)
{
/* Documented, supported MPE functions. */
extern void GETPRIVMODE(void);
extern void GETUSERMODE(void);
/* Undocumented, unsupported MPE functions. */
extern void get_time_change_info(long long *, char *, char *);
extern void initialize_system_time(long long, int);
extern void set_time_correction(long long, int, int);
extern long long ticks_to_micro(long long);
char pwf_since_boot, recover_pwf_time;
long long big_sec, big_usec, mpetime, offset_ticks, offset_usec;
big_sec = tvp->tv_sec;
big_usec = tvp->tv_usec;
mpetime = (big_sec * 1000000LL) + big_usec; /* Desired UTC microseconds */
GETPRIVMODE();
set_time_correction(0LL,0,0); /* Cancel previous time correction, if any */
get_time_change_info(&offset_ticks, &pwf_since_boot, &recover_pwf_time);
offset_usec = ticks_to_micro(offset_ticks); /* UTC offset microseconds */
mpetime = mpetime + offset_usec; /* Convert from UTC to local time */
initialize_system_time(mpetime,1);
GETUSERMODE();
return 0;
}
#endif /* MPE */
#define SET_TOD_UNDETERMINED 0
#define SET_TOD_CLOCK_SETTIME 1
#define SET_TOD_SETTIMEOFDAY 2
#define SET_TOD_STIME 3
const char * const set_tod_used[] = {
"undetermined",
"clock_settime",
"settimeofday",
"stime"
};
pset_tod_using set_tod_using = NULL;
int
ntp_set_tod(
struct timeval *tvp,
void *tzp
)
{
static int tod;
int rc;
int saved_errno;
TRACE(1, ("In ntp_set_tod\n"));
rc = -1;
saved_errno = 0;
#ifdef HAVE_CLOCK_SETTIME
if (rc && (SET_TOD_CLOCK_SETTIME == tod || !tod)) {
struct timespec ts;
/* Convert timeval to timespec */
ts.tv_sec = tvp->tv_sec;
ts.tv_nsec = 1000 * tvp->tv_usec;
errno = 0;
rc = clock_settime(CLOCK_REALTIME, &ts);
saved_errno = errno;
TRACE(1, ("ntp_set_tod: clock_settime: %d %m\n", rc));
if (!tod && !rc)
tod = SET_TOD_CLOCK_SETTIME;
}
#endif /* HAVE_CLOCK_SETTIME */
#ifdef HAVE_SETTIMEOFDAY
if (rc && (SET_TOD_SETTIMEOFDAY == tod || !tod)) {
struct timeval adjtv;
/*
* Some broken systems don't reset adjtime() when the
* clock is stepped.
*/
adjtv.tv_sec = adjtv.tv_usec = 0;
adjtime(&adjtv, NULL);
errno = 0;
rc = SETTIMEOFDAY(tvp, tzp);
saved_errno = errno;
TRACE(1, ("ntp_set_tod: settimeofday: %d %m\n", rc));
if (!tod && !rc)
tod = SET_TOD_SETTIMEOFDAY;
}
#endif /* HAVE_SETTIMEOFDAY */
#ifdef HAVE_STIME
if (rc && (SET_TOD_STIME == tod || !tod)) {
long tp = tvp->tv_sec;
errno = 0;
rc = stime(&tp); /* lie as bad as SysVR4 */
saved_errno = errno;
TRACE(1, ("ntp_set_tod: stime: %d %m\n", rc));
if (!tod && !rc)
tod = SET_TOD_STIME;
}
#endif /* HAVE_STIME */
errno = saved_errno; /* for %m below */
TRACE(1, ("ntp_set_tod: Final result: %s: %d %m\n",
set_tod_used[tod], rc));
/*
* Say how we're setting the time of day
*/
if (!rc && NULL != set_tod_using) {
(*set_tod_using)(set_tod_used[tod]);
set_tod_using = NULL;
}
if (rc)
errno = saved_errno;
return rc;
}
#endif /* not SYS_WINNT */
#if defined (SYS_WINNT) || defined (SYS_VXWORKS) || defined(MPE)
/* getpass is used in ntpq.c and ntpdc.c */
char *
getpass(const char * prompt)
{
int c, i;
static char password[32];
fprintf(stderr, "%s", prompt);
fflush(stderr);
for (i=0; i<sizeof(password)-1 && ((c=_getch())!='\n' && c!='\r'); i++) {
password[i] = (char) c;
}
password[i] = '\0';
fputc('\n', stderr);
fflush(stderr);
return password;
}
#endif /* SYS_WINNT */