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chrony/conf.c
Miroslav Lichvar 7f45eb7957 ntp: add server time smoothing 
Time smoothing determines an offset that needs to be applied to the
cooked time to make it smooth for external observers. Observed offset
and frequency change slowly and there are no discontinuities. This can
be used on an NTP server to make it easier for the clients to track the
time and keep their clocks close together even when large offset or
frequency corrections are applied to the server's clock (e.g. after
being offline for longer time).

Accumulated offset and frequency are smoothed out in three stages. In
the first stage, the frequency is changed at a constant rate (wander) up
to a maximum, in the second stage the frequency stays at the maximum for
as long as needed and in the third stage the frequency is brought back
to zero.

Time smoothing is configured by the smoothtime directive. It takes two
arguments, maximum frequency offset and maximum wander. It's disabled by
default.
2015-04-07 10:42:26 +02:00

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/*
chronyd/chronyc - Programs for keeping computer clocks accurate.
**********************************************************************
* Copyright (C) Richard P. Curnow 1997-2003
* Copyright (C) Miroslav Lichvar 2009-2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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 General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
**********************************************************************
=======================================================================
Module that reads and processes the configuration file.
*/
#include "config.h"
#include "sysincl.h"
#include "array.h"
#include "conf.h"
#include "ntp_sources.h"
#include "ntp_core.h"
#include "refclock.h"
#include "cmdmon.h"
#include "srcparams.h"
#include "logging.h"
#include "nameserv.h"
#include "memory.h"
#include "cmdparse.h"
#include "util.h"
/* ================================================== */
/* Forward prototypes */
static int parse_string(char *line, char **result);
static int parse_int(char *line, int *result);
static int parse_uint32(char *, uint32_t *result);
static int parse_double(char *line, double *result);
static int parse_null(char *line);
static void parse_allow(char *);
static void parse_bindacqaddress(char *);
static void parse_bindaddress(char *);
static void parse_bindcmdaddress(char *);
static void parse_broadcast(char *);
static void parse_clientloglimit(char *);
static void parse_cmdallow(char *);
static void parse_cmddeny(char *);
static void parse_deny(char *);
static void parse_fallbackdrift(char *);
static void parse_include(char *);
static void parse_initstepslew(char *);
static void parse_leapsecmode(char *);
static void parse_local(char *);
static void parse_log(char *);
static void parse_mailonchange(char *);
static void parse_makestep(char *);
static void parse_maxchange(char *);
static void parse_peer(char *);
static void parse_pool(char *);
static void parse_refclock(char *);
static void parse_server(char *);
static void parse_smoothtime(char *);
static void parse_tempcomp(char *);
/* ================================================== */
/* Configuration variables */
static int restarted = 0;
static int generate_command_key = 0;
static char *rtc_device;
static int acquisition_port = -1;
static int ntp_port = 123;
static char *keys_file = NULL;
static char *drift_file = NULL;
static char *rtc_file = NULL;
static uint32_t command_key_id;
static double max_update_skew = 1000.0;
static double correction_time_ratio = 3.0;
static double max_clock_error = 1.0; /* in ppm */
static double max_slew_rate = 1e6 / 12.0; /* in ppm */
static double reselect_distance = 1e-4;
static double stratum_weight = 1e-3;
static double combine_limit = 3.0;
static int cmd_port = DEFAULT_CANDM_PORT;
static int do_log_measurements = 0;
static int do_log_statistics = 0;
static int do_log_tracking = 0;
static int do_log_rtc = 0;
static int do_log_refclocks = 0;
static int do_log_tempcomp = 0;
static int do_dump_on_exit = 0;
static int log_banner = 32;
static char *logdir;
static char *dumpdir;
static int enable_local=0;
static int local_stratum;
/* Threshold (in seconds) - if absolute value of initial error is less
than this, slew instead of stepping */
static double init_slew_threshold;
/* Array of IPAddr */
static ARR_Instance init_sources;
static int enable_manual=0;
/* Flag set if the RTC runs UTC (default is it runs local time
incl. daylight saving). */
static int rtc_on_utc = 0;
/* Filename used to read the hwclock(8) LOCAL/UTC setting */
static char *hwclock_file = NULL;
/* Flag set if the RTC should be automatically synchronised by kernel */
static int rtc_sync = 0;
/* Limit and threshold for clock stepping */
static int make_step_limit = 0;
static double make_step_threshold = 0.0;
/* Threshold for automatic RTC trimming */
static double rtc_autotrim_threshold = 0.0;
/* Minimum number of selectables sources required to update the clock */
static int min_sources = 1;
/* Number of updates before offset checking, number of ignored updates
before exiting and the maximum allowed offset */
static int max_offset_delay = -1;
static int max_offset_ignore;
static double max_offset;
/* Maximum and minimum number of samples per source */
static int max_samples = 0; /* no limit */
static int min_samples = 0;
/* Flag set if we should log to syslog when a time adjustment
exceeding the threshold is initiated */
static int do_log_change = 0;
static double log_change_threshold = 0.0;
static char *mail_user_on_change = NULL;
static double mail_change_threshold = 0.0;
/* Flag indicating that we don't want to log clients, e.g. to save
memory */
static int no_client_log = 0;
/* Limit memory allocated for the clients log */
static unsigned long client_log_limit = 524288;
/* Minimum and maximum fallback drift intervals */
static int fb_drift_min = 0;
static int fb_drift_max = 0;
/* IP addresses for binding the NTP server sockets to. UNSPEC family means
INADDR_ANY will be used */
static IPAddr bind_address4, bind_address6;
/* IP addresses for binding the NTP client sockets to. UNSPEC family means
INADDR_ANY will be used */
static IPAddr bind_acq_address4, bind_acq_address6;
/* IP addresses for binding the command socket to. UNSPEC family means
the loopback address will be used */
static IPAddr bind_cmd_address4, bind_cmd_address6;
/* Filename to use for storing pid of running chronyd, to prevent multiple
* chronyds being started. */
static char *pidfile;
/* Smoothing constants */
static double smooth_max_freq = 0.0; /* in ppm */
static double smooth_max_wander = 0.0; /* in ppm/s */
/* Temperature sensor, update interval and compensation coefficients */
static char *tempcomp_sensor_file = NULL;
static char *tempcomp_point_file = NULL;
static double tempcomp_interval;
static double tempcomp_T0, tempcomp_k0, tempcomp_k1, tempcomp_k2;
static int sched_priority = 0;
static int lock_memory = 0;
/* Leap second handling mode */
static REF_LeapMode leapsec_mode = REF_LeapModeSystem;
/* Name of a system timezone containing leap seconds occuring at midnight */
static char *leapsec_tz = NULL;
/* Name of the user to which will be dropped root privileges. */
static char *user;
typedef struct {
NTP_Source_Type type;
int pool;
CPS_NTP_Source params;
} NTP_Source;
/* Array of NTP_Source */
static ARR_Instance ntp_sources;
/* Array of RefclockParameters */
static ARR_Instance refclock_sources;
typedef struct _AllowDeny {
IPAddr ip;
int subnet_bits;
int all; /* 1 to override existing more specific defns */
int allow; /* 0 for deny, 1 for allow */
} AllowDeny;
/* Arrays of AllowDeny */
static ARR_Instance ntp_restrictions;
static ARR_Instance cmd_restrictions;
typedef struct {
IPAddr addr;
unsigned short port;
int interval;
} NTP_Broadcast_Destination;
/* Array of NTP_Broadcast_Destination */
static ARR_Instance broadcasts;
/* ================================================== */
/* The line number in the configuration file being processed */
static int line_number;
static const char *processed_file;
static const char *processed_command;
/* ================================================== */
static void
command_parse_error(void)
{
LOG_FATAL(LOGF_Configure, "Could not parse %s directive at line %d%s%s",
processed_command, line_number, processed_file ? " in file " : "",
processed_file ? processed_file : "");
}
/* ================================================== */
static void
other_parse_error(const char *message)
{
LOG_FATAL(LOGF_Configure, "%s at line %d%s%s",
message, line_number, processed_file ? " in file " : "",
processed_file ? processed_file : "");
}
/* ================================================== */
static int
get_number_of_args(char *line)
{
int num = 0;
/* The line is normalized, between arguments is just one space */
if (*line == ' ')
line++;
if (*line)
num++;
for (; *line; line++) {
if (*line == ' ')
num++;
}
return num;
}
/* ================================================== */
static void
check_number_of_args(char *line, int num)
{
num -= get_number_of_args(line);
if (num) {
LOG_FATAL(LOGF_Configure, "%s arguments for %s directive at line %d%s%s",
num > 0 ? "Missing" : "Too many",
processed_command, line_number, processed_file ? " in file " : "",
processed_file ? processed_file : "");
}
}
/* ================================================== */
void
CNF_Initialise(int r)
{
restarted = r;
init_sources = ARR_CreateInstance(sizeof (IPAddr));
ntp_sources = ARR_CreateInstance(sizeof (NTP_Source));
refclock_sources = ARR_CreateInstance(sizeof (RefclockParameters));
broadcasts = ARR_CreateInstance(sizeof (NTP_Broadcast_Destination));
ntp_restrictions = ARR_CreateInstance(sizeof (AllowDeny));
cmd_restrictions = ARR_CreateInstance(sizeof (AllowDeny));
dumpdir = Strdup(".");
logdir = Strdup(".");
pidfile = Strdup("/var/run/chronyd.pid");
rtc_device = Strdup("/dev/rtc");
user = Strdup(DEFAULT_USER);
}
/* ================================================== */
void
CNF_Finalise(void)
{
unsigned int i;
for (i = 0; i < ARR_GetSize(ntp_sources); i++)
Free(((NTP_Source *)ARR_GetElement(ntp_sources, i))->params.name);
ARR_DestroyInstance(init_sources);
ARR_DestroyInstance(ntp_sources);
ARR_DestroyInstance(refclock_sources);
ARR_DestroyInstance(broadcasts);
ARR_DestroyInstance(ntp_restrictions);
ARR_DestroyInstance(cmd_restrictions);
Free(drift_file);
Free(dumpdir);
Free(hwclock_file);
Free(keys_file);
Free(leapsec_tz);
Free(logdir);
Free(pidfile);
Free(rtc_device);
Free(rtc_file);
Free(user);
Free(mail_user_on_change);
Free(tempcomp_sensor_file);
Free(tempcomp_point_file);
}
/* ================================================== */
/* Read the configuration file */
void
CNF_ReadFile(const char *filename)
{
FILE *in;
char line[2048];
int i;
in = fopen(filename, "r");
if (!in) {
LOG_FATAL(LOGF_Configure, "Could not open configuration file %s", filename);
return;
}
for (i = 1; fgets(line, sizeof(line), in); i++) {
CNF_ParseLine(filename, i, line);
}
fclose(in);
}
/* ================================================== */
/* Parse one configuration line */
void
CNF_ParseLine(const char *filename, int number, char *line)
{
char *p, *command;
/* Set global variables used in error messages */
processed_file = filename;
line_number = number;
/* Remove extra white-space and comments */
CPS_NormalizeLine(line);
/* Skip blank lines */
if (!*line)
return;
/* We have a real line, now try to match commands */
processed_command = command = line;
p = CPS_SplitWord(line);
if (!strcasecmp(command, "acquisitionport")) {
parse_int(p, &acquisition_port);
} else if (!strcasecmp(command, "allow")) {
parse_allow(p);
} else if (!strcasecmp(command, "bindacqaddress")) {
parse_bindacqaddress(p);
} else if (!strcasecmp(command, "bindaddress")) {
parse_bindaddress(p);
} else if (!strcasecmp(command, "bindcmdaddress")) {
parse_bindcmdaddress(p);
} else if (!strcasecmp(command, "broadcast")) {
parse_broadcast(p);
} else if (!strcasecmp(command, "clientloglimit")) {
parse_clientloglimit(p);
} else if (!strcasecmp(command, "cmdallow")) {
parse_cmdallow(p);
} else if (!strcasecmp(command, "cmddeny")) {
parse_cmddeny(p);
} else if (!strcasecmp(command, "cmdport")) {
parse_int(p, &cmd_port);
} else if (!strcasecmp(command, "combinelimit")) {
parse_double(p, &combine_limit);
} else if (!strcasecmp(command, "commandkey")) {
parse_uint32(p, &command_key_id);
} else if (!strcasecmp(command, "corrtimeratio")) {
parse_double(p, &correction_time_ratio);
} else if (!strcasecmp(command, "deny")) {
parse_deny(p);
} else if (!strcasecmp(command, "driftfile")) {
parse_string(p, &drift_file);
} else if (!strcasecmp(command, "dumpdir")) {
parse_string(p, &dumpdir);
} else if (!strcasecmp(command, "dumponexit")) {
do_dump_on_exit = parse_null(p);
} else if (!strcasecmp(command, "fallbackdrift")) {
parse_fallbackdrift(p);
} else if (!strcasecmp(command, "generatecommandkey")) {
generate_command_key = parse_null(p);
} else if (!strcasecmp(command, "hwclockfile")) {
parse_string(p, &hwclock_file);
} else if (!strcasecmp(command, "include")) {
parse_include(p);
} else if (!strcasecmp(command, "initstepslew")) {
parse_initstepslew(p);
} else if (!strcasecmp(command, "keyfile")) {
parse_string(p, &keys_file);
} else if (!strcasecmp(command, "leapsecmode")) {
parse_leapsecmode(p);
} else if (!strcasecmp(command, "leapsectz")) {
parse_string(p, &leapsec_tz);
} else if (!strcasecmp(command, "linux_freq_scale")) {
LOG(LOGS_WARN, LOGF_Configure, "%s directive is no longer supported", command);
} else if (!strcasecmp(command, "linux_hz")) {
LOG(LOGS_WARN, LOGF_Configure, "%s directive is no longer supported", command);
} else if (!strcasecmp(command, "local")) {
parse_local(p);
} else if (!strcasecmp(command, "lock_all")) {
lock_memory = parse_null(p);
} else if (!strcasecmp(command, "log")) {
parse_log(p);
} else if (!strcasecmp(command, "logbanner")) {
parse_int(p, &log_banner);
} else if (!strcasecmp(command, "logchange")) {
do_log_change = parse_double(p, &log_change_threshold);
} else if (!strcasecmp(command, "logdir")) {
parse_string(p, &logdir);
} else if (!strcasecmp(command, "mailonchange")) {
parse_mailonchange(p);
} else if (!strcasecmp(command, "makestep")) {
parse_makestep(p);
} else if (!strcasecmp(command, "manual")) {
enable_manual = parse_null(p);
} else if (!strcasecmp(command, "maxchange")) {
parse_maxchange(p);
} else if (!strcasecmp(command, "maxclockerror")) {
parse_double(p, &max_clock_error);
} else if (!strcasecmp(command, "maxsamples")) {
parse_int(p, &max_samples);
} else if (!strcasecmp(command, "maxslewrate")) {
parse_double(p, &max_slew_rate);
} else if (!strcasecmp(command, "maxupdateskew")) {
parse_double(p, &max_update_skew);
} else if (!strcasecmp(command, "minsamples")) {
parse_int(p, &min_samples);
} else if (!strcasecmp(command, "minsources")) {
parse_int(p, &min_sources);
} else if (!strcasecmp(command, "noclientlog")) {
no_client_log = parse_null(p);
} else if (!strcasecmp(command, "peer")) {
parse_peer(p);
} else if (!strcasecmp(command, "pidfile")) {
parse_string(p, &pidfile);
} else if (!strcasecmp(command, "pool")) {
parse_pool(p);
} else if (!strcasecmp(command, "port")) {
parse_int(p, &ntp_port);
} else if (!strcasecmp(command, "refclock")) {
parse_refclock(p);
} else if (!strcasecmp(command, "reselectdist")) {
parse_double(p, &reselect_distance);
} else if (!strcasecmp(command, "rtcautotrim")) {
parse_double(p, &rtc_autotrim_threshold);
} else if (!strcasecmp(command, "rtcdevice")) {
parse_string(p, &rtc_device);
} else if (!strcasecmp(command, "rtcfile")) {
parse_string(p, &rtc_file);
} else if (!strcasecmp(command, "rtconutc")) {
rtc_on_utc = parse_null(p);
} else if (!strcasecmp(command, "rtcsync")) {
rtc_sync = parse_null(p);
} else if (!strcasecmp(command, "sched_priority")) {
parse_int(p, &sched_priority);
} else if (!strcasecmp(command, "server")) {
parse_server(p);
} else if (!strcasecmp(command, "smoothtime")) {
parse_smoothtime(p);
} else if (!strcasecmp(command, "stratumweight")) {
parse_double(p, &stratum_weight);
} else if (!strcasecmp(command, "tempcomp")) {
parse_tempcomp(p);
} else if (!strcasecmp(command, "user")) {
parse_string(p, &user);
} else {
other_parse_error("Invalid command");
}
}
/* ================================================== */
static int
parse_string(char *line, char **result)
{
check_number_of_args(line, 1);
Free(*result);
*result = Strdup(line);
return 1;
}
/* ================================================== */
static int
parse_int(char *line, int *result)
{
check_number_of_args(line, 1);
if (sscanf(line, "%d", result) != 1) {
command_parse_error();
return 0;
}
return 1;
}
/* ================================================== */
static int
parse_uint32(char *line, uint32_t *result)
{
check_number_of_args(line, 1);
if (sscanf(line, "%"SCNu32, result) != 1) {
command_parse_error();
return 0;
}
return 1;
}
/* ================================================== */
static int
parse_double(char *line, double *result)
{
check_number_of_args(line, 1);
if (sscanf(line, "%lf", result) != 1) {
command_parse_error();
return 0;
}
return 1;
}
/* ================================================== */
static int
parse_null(char *line)
{
check_number_of_args(line, 0);
return 1;
}
/* ================================================== */
static void
parse_source(char *line, NTP_Source_Type type, int pool)
{
CPS_Status status;
NTP_Source source;
char str[64];
source.type = type;
source.pool = pool;
status = CPS_ParseNTPSourceAdd(line, &source.params);
if (status != CPS_Success) {
CPS_StatusToString(status, str, sizeof (str));
other_parse_error(str);
return;
}
source.params.name = Strdup(source.params.name);
ARR_AppendElement(ntp_sources, &source);
}
/* ================================================== */
static void
parse_server(char *line)
{
parse_source(line, NTP_SERVER, 0);
}
/* ================================================== */
static void
parse_peer(char *line)
{
parse_source(line, NTP_PEER, 0);
}
/* ================================================== */
static void
parse_pool(char *line)
{
parse_source(line, NTP_SERVER, 1);
}
/* ================================================== */
static void
parse_refclock(char *line)
{
int n, poll, dpoll, filter_length, pps_rate, min_samples, max_samples;
uint32_t ref_id, lock_ref_id;
double offset, delay, precision, max_dispersion;
char *p, *cmd, *name, *param;
unsigned char ref[5];
SRC_SelectOption sel_option;
RefclockParameters *refclock;
poll = 4;
dpoll = 0;
filter_length = 64;
pps_rate = 0;
min_samples = SRC_DEFAULT_MINSAMPLES;
max_samples = SRC_DEFAULT_MAXSAMPLES;
offset = 0.0;
delay = 1e-9;
precision = 0.0;
max_dispersion = 0.0;
ref_id = 0;
lock_ref_id = 0;
sel_option = SRC_SelectNormal;
if (!*line) {
command_parse_error();
return;
}
p = line;
line = CPS_SplitWord(line);
if (!*line) {
command_parse_error();
return;
}
name = Strdup(p);
p = line;
line = CPS_SplitWord(line);
param = Strdup(p);
while (*line) {
cmd = line;
line = CPS_SplitWord(line);
if (!strcasecmp(cmd, "refid")) {
if (sscanf(line, "%4s%n", (char *)ref, &n) != 1)
break;
ref_id = ref[0] << 24 | ref[1] << 16 | ref[2] << 8 | ref[3];
} else if (!strcasecmp(cmd, "lock")) {
if (sscanf(line, "%4s%n", (char *)ref, &n) != 1)
break;
lock_ref_id = ref[0] << 24 | ref[1] << 16 | ref[2] << 8 | ref[3];
} else if (!strcasecmp(cmd, "poll")) {
if (sscanf(line, "%d%n", &poll, &n) != 1) {
break;
}
} else if (!strcasecmp(cmd, "dpoll")) {
if (sscanf(line, "%d%n", &dpoll, &n) != 1) {
break;
}
} else if (!strcasecmp(cmd, "filter")) {
if (sscanf(line, "%d%n", &filter_length, &n) != 1) {
break;
}
} else if (!strcasecmp(cmd, "rate")) {
if (sscanf(line, "%d%n", &pps_rate, &n) != 1)
break;
} else if (!strcasecmp(cmd, "minsamples")) {
if (sscanf(line, "%d%n", &min_samples, &n) != 1)
break;
} else if (!strcasecmp(cmd, "maxsamples")) {
if (sscanf(line, "%d%n", &max_samples, &n) != 1)
break;
} else if (!strcasecmp(cmd, "offset")) {
if (sscanf(line, "%lf%n", &offset, &n) != 1)
break;
} else if (!strcasecmp(cmd, "delay")) {
if (sscanf(line, "%lf%n", &delay, &n) != 1)
break;
} else if (!strcasecmp(cmd, "precision")) {
if (sscanf(line, "%lf%n", &precision, &n) != 1)
break;
} else if (!strcasecmp(cmd, "maxdispersion")) {
if (sscanf(line, "%lf%n", &max_dispersion, &n) != 1)
break;
} else if (!strcasecmp(cmd, "noselect")) {
n = 0;
sel_option = SRC_SelectNoselect;
} else if (!strcasecmp(cmd, "prefer")) {
n = 0;
sel_option = SRC_SelectPrefer;
} else {
break;
}
line += n;
}
if (*line) {
other_parse_error("Invalid/unreadable refclock parameter");
return;
}
refclock = (RefclockParameters *)ARR_GetNewElement(refclock_sources);
refclock->driver_name = name;
refclock->driver_parameter = param;
refclock->driver_poll = dpoll;
refclock->poll = poll;
refclock->filter_length = filter_length;
refclock->pps_rate = pps_rate;
refclock->min_samples = min_samples;
refclock->max_samples = max_samples;
refclock->offset = offset;
refclock->delay = delay;
refclock->precision = precision;
refclock->max_dispersion = max_dispersion;
refclock->sel_option = sel_option;
refclock->ref_id = ref_id;
refclock->lock_ref_id = lock_ref_id;
}
/* ================================================== */
static void
parse_log(char *line)
{
char *log_name;
do {
log_name = line;
line = CPS_SplitWord(line);
if (*log_name) {
if (!strcmp(log_name, "measurements")) {
do_log_measurements = 1;
} else if (!strcmp(log_name, "statistics")) {
do_log_statistics = 1;
} else if (!strcmp(log_name, "tracking")) {
do_log_tracking = 1;
} else if (!strcmp(log_name, "rtc")) {
do_log_rtc = 1;
} else if (!strcmp(log_name, "refclocks")) {
do_log_refclocks = 1;
} else if (!strcmp(log_name, "tempcomp")) {
do_log_tempcomp = 1;
} else {
other_parse_error("Invalid log parameter");
break;
}
} else {
break;
}
} while (1);
}
/* ================================================== */
static void
parse_local(char *line)
{
int stratum;
if (sscanf(line, "stratum%d", &stratum) == 1) {
local_stratum = stratum;
enable_local = 1;
} else {
command_parse_error();
}
}
/* ================================================== */
static void
parse_initstepslew(char *line)
{
char *p, *hostname;
IPAddr ip_addr;
/* Ignore the line if chronyd was started with -R. */
if (restarted) {
return;
}
ARR_SetSize(init_sources, 0);
p = CPS_SplitWord(line);
if (sscanf(line, "%lf", &init_slew_threshold) != 1) {
command_parse_error();
return;
}
while (*p) {
hostname = p;
p = CPS_SplitWord(p);
if (*hostname) {
if (DNS_Name2IPAddress(hostname, &ip_addr, 1) == DNS_Success) {
ARR_AppendElement(init_sources, &ip_addr);
} else {
LOG(LOGS_WARN, LOGF_Configure, "Could not resolve address of initstepslew server %s", hostname);
}
}
}
}
/* ================================================== */
static void
parse_leapsecmode(char *line)
{
if (!strcasecmp(line, "system"))
leapsec_mode = REF_LeapModeSystem;
else if (!strcasecmp(line, "slew"))
leapsec_mode = REF_LeapModeSlew;
else if (!strcasecmp(line, "step"))
leapsec_mode = REF_LeapModeStep;
else if (!strcasecmp(line, "ignore"))
leapsec_mode = REF_LeapModeIgnore;
else
command_parse_error();
}
/* ================================================== */
static void
parse_clientloglimit(char *line)
{
check_number_of_args(line, 1);
if (sscanf(line, "%lu", &client_log_limit) != 1) {
command_parse_error();
}
if (client_log_limit == 0) {
/* unlimited */
client_log_limit = (unsigned long)-1;
}
}
/* ================================================== */
static void
parse_fallbackdrift(char *line)
{
check_number_of_args(line, 2);
if (sscanf(line, "%d %d", &fb_drift_min, &fb_drift_max) != 2) {
command_parse_error();
}
}
/* ================================================== */
static void
parse_makestep(char *line)
{
check_number_of_args(line, 2);
if (sscanf(line, "%lf %d", &make_step_threshold, &make_step_limit) != 2) {
make_step_limit = 0;
command_parse_error();
}
/* Disable limited makestep if chronyd was started with -R. */
if (restarted && make_step_limit > 0) {
make_step_limit = 0;
}
}
/* ================================================== */
static void
parse_maxchange(char *line)
{
check_number_of_args(line, 3);
if (sscanf(line, "%lf %d %d", &max_offset, &max_offset_delay, &max_offset_ignore) != 3) {
max_offset_delay = -1;
command_parse_error();
}
}
/* ================================================== */
static void
parse_mailonchange(char *line)
{
char *address;
check_number_of_args(line, 2);
address = line;
line = CPS_SplitWord(line);
Free(mail_user_on_change);
if (sscanf(line, "%lf", &mail_change_threshold) == 1) {
mail_user_on_change = Strdup(address);
} else {
mail_user_on_change = NULL;
command_parse_error();
}
}
/* ================================================== */
static void
parse_allow_deny(char *line, ARR_Instance restrictions, int allow)
{
char *p;
unsigned long a, b, c, d, n;
int all = 0;
AllowDeny *new_node = NULL;
IPAddr ip_addr;
p = line;
if (!strncmp(p, "all", 3)) {
all = 1;
p = CPS_SplitWord(line);
}
if (!*p) {
/* Empty line applies to all addresses */
new_node = (AllowDeny *)ARR_GetNewElement(restrictions);
new_node->allow = allow;
new_node->all = all;
new_node->ip.family = IPADDR_UNSPEC;
new_node->subnet_bits = 0;
} else {
char *slashpos;
slashpos = strchr(p, '/');
if (slashpos) *slashpos = 0;
check_number_of_args(p, 1);
n = 0;
if (UTI_StringToIP(p, &ip_addr) ||
(n = sscanf(p, "%lu.%lu.%lu.%lu", &a, &b, &c, &d)) >= 1) {
new_node = (AllowDeny *)ARR_GetNewElement(restrictions);
new_node->allow = allow;
new_node->all = all;
if (n == 0) {
new_node->ip = ip_addr;
if (ip_addr.family == IPADDR_INET6)
new_node->subnet_bits = 128;
else
new_node->subnet_bits = 32;
} else {
new_node->ip.family = IPADDR_INET4;
a &= 0xff;
b &= 0xff;
c &= 0xff;
d &= 0xff;
switch (n) {
case 1:
new_node->ip.addr.in4 = (a<<24);
new_node->subnet_bits = 8;
break;
case 2:
new_node->ip.addr.in4 = (a<<24) | (b<<16);
new_node->subnet_bits = 16;
break;
case 3:
new_node->ip.addr.in4 = (a<<24) | (b<<16) | (c<<8);
new_node->subnet_bits = 24;
break;
case 4:
new_node->ip.addr.in4 = (a<<24) | (b<<16) | (c<<8) | d;
new_node->subnet_bits = 32;
break;
default:
assert(0);
}
}
if (slashpos) {
int specified_subnet_bits, n;
n = sscanf(slashpos+1, "%d", &specified_subnet_bits);
if (n == 1) {
new_node->subnet_bits = specified_subnet_bits;
} else {
command_parse_error();
}
}
} else {
if (DNS_Name2IPAddress(p, &ip_addr, 1) == DNS_Success) {
new_node = (AllowDeny *)ARR_GetNewElement(restrictions);
new_node->allow = allow;
new_node->all = all;
new_node->ip = ip_addr;
if (ip_addr.family == IPADDR_INET6)
new_node->subnet_bits = 128;
else
new_node->subnet_bits = 32;
} else {
command_parse_error();
}
}
}
}
/* ================================================== */
static void
parse_allow(char *line)
{
parse_allow_deny(line, ntp_restrictions, 1);
}
/* ================================================== */
static void
parse_deny(char *line)
{
parse_allow_deny(line, ntp_restrictions, 0);
}
/* ================================================== */
static void
parse_cmdallow(char *line)
{
parse_allow_deny(line, cmd_restrictions, 1);
}
/* ================================================== */
static void
parse_cmddeny(char *line)
{
parse_allow_deny(line, cmd_restrictions, 0);
}
/* ================================================== */
static void
parse_bindacqaddress(char *line)
{
IPAddr ip;
check_number_of_args(line, 1);
if (UTI_StringToIP(line, &ip)) {
if (ip.family == IPADDR_INET4)
bind_acq_address4 = ip;
else if (ip.family == IPADDR_INET6)
bind_acq_address6 = ip;
} else {
command_parse_error();
}
}
/* ================================================== */
static void
parse_bindaddress(char *line)
{
IPAddr ip;
check_number_of_args(line, 1);
if (UTI_StringToIP(line, &ip)) {
if (ip.family == IPADDR_INET4)
bind_address4 = ip;
else if (ip.family == IPADDR_INET6)
bind_address6 = ip;
} else {
command_parse_error();
}
}
/* ================================================== */
static void
parse_bindcmdaddress(char *line)
{
IPAddr ip;
check_number_of_args(line, 1);
if (UTI_StringToIP(line, &ip)) {
if (ip.family == IPADDR_INET4)
bind_cmd_address4 = ip;
else if (ip.family == IPADDR_INET6)
bind_cmd_address6 = ip;
} else {
command_parse_error();
}
}
/* ================================================== */
static void
parse_broadcast(char *line)
{
/* Syntax : broadcast <interval> <broadcast-IP-addr> [<port>] */
NTP_Broadcast_Destination *destination;
int port;
int interval;
char *p;
IPAddr ip;
p = line;
line = CPS_SplitWord(line);
if (sscanf(p, "%d", &interval) != 1) {
command_parse_error();
return;
}
p = line;
line = CPS_SplitWord(line);
if (!UTI_StringToIP(p, &ip)) {
command_parse_error();
return;
}
p = line;
line = CPS_SplitWord(line);
if (*p) {
if (sscanf(p, "%d", &port) != 1 || *line) {
command_parse_error();
return;
}
} else {
/* default port */
port = 123;
}
destination = (NTP_Broadcast_Destination *)ARR_GetNewElement(broadcasts);
destination->addr = ip;
destination->port = port;
destination->interval = interval;
}
/* ================================================== */
static void
parse_smoothtime(char *line)
{
check_number_of_args(line, 2);
if (sscanf(line, "%lf %lf", &smooth_max_freq, &smooth_max_wander) != 2) {
smooth_max_freq = 0.0;
command_parse_error();
}
}
/* ================================================== */
static void
parse_tempcomp(char *line)
{
char *p;
int point_form;
point_form = get_number_of_args(line) == 3;
if (!point_form)
check_number_of_args(line, 6);
p = line;
line = CPS_SplitWord(line);
if (!*p) {
command_parse_error();
return;
}
Free(tempcomp_point_file);
if (point_form) {
if (sscanf(line, "%lf", &tempcomp_interval) != 1) {
command_parse_error();
return;
}
tempcomp_point_file = Strdup(CPS_SplitWord(line));
} else {
if (sscanf(line, "%lf %lf %lf %lf %lf", &tempcomp_interval,
&tempcomp_T0, &tempcomp_k0, &tempcomp_k1, &tempcomp_k2) != 5) {
command_parse_error();
return;
}
tempcomp_point_file = NULL;
}
Free(tempcomp_sensor_file);
tempcomp_sensor_file = Strdup(p);
}
/* ================================================== */
static void
parse_include(char *line)
{
check_number_of_args(line, 1);
CNF_ReadFile(line);
}
/* ================================================== */
void
CNF_AddInitSources(void)
{
CPS_NTP_Source cps_source;
NTP_Remote_Address ntp_addr;
char dummy_hostname[2] = "H";
unsigned int i;
for (i = 0; i < ARR_GetSize(init_sources); i++) {
/* Get the default NTP params */
CPS_ParseNTPSourceAdd(dummy_hostname, &cps_source);
/* Add the address as an offline iburst server */
ntp_addr.ip_addr = *(IPAddr *)ARR_GetElement(init_sources, i);
ntp_addr.port = cps_source.port;
cps_source.params.iburst = 1;
cps_source.params.online = 0;
NSR_AddSource(&ntp_addr, NTP_SERVER, &cps_source.params);
}
ARR_SetSize(init_sources, 0);
}
/* ================================================== */
void
CNF_AddSources(void)
{
NTP_Source *source;
unsigned int i;
for (i = 0; i < ARR_GetSize(ntp_sources); i++) {
source = (NTP_Source *)ARR_GetElement(ntp_sources, i);
NSR_AddSourceByName(source->params.name, source->params.port,
source->pool, source->type, &source->params.params);
Free(source->params.name);
}
ARR_SetSize(ntp_sources, 0);
}
/* ================================================== */
void
CNF_AddRefclocks(void)
{
unsigned int i;
for (i = 0; i < ARR_GetSize(refclock_sources); i++) {
RCL_AddRefclock((RefclockParameters *)ARR_GetElement(refclock_sources, i));
}
ARR_SetSize(refclock_sources, 0);
}
/* ================================================== */
void
CNF_AddBroadcasts(void)
{
unsigned int i;
NTP_Broadcast_Destination *destination;
for (i = 0; i < ARR_GetSize(broadcasts); i++) {
destination = (NTP_Broadcast_Destination *)ARR_GetElement(broadcasts, i);
NCR_AddBroadcastDestination(&destination->addr, destination->port,
destination->interval);
}
ARR_SetSize(broadcasts, 0);
}
/* ================================================== */
int
CNF_GetNTPPort(void)
{
return ntp_port;
}
/* ================================================== */
int
CNF_GetAcquisitionPort(void)
{
return acquisition_port;
}
/* ================================================== */
char *
CNF_GetDriftFile(void)
{
return drift_file;
}
/* ================================================== */
int
CNF_GetLogBanner(void)
{
return log_banner;
}
/* ================================================== */
char *
CNF_GetLogDir(void)
{
return logdir;
}
/* ================================================== */
char *
CNF_GetDumpDir(void)
{
return dumpdir;
}
/* ================================================== */
int
CNF_GetLogMeasurements(void)
{
return do_log_measurements;
}
/* ================================================== */
int
CNF_GetLogStatistics(void)
{
return do_log_statistics;
}
/* ================================================== */
int
CNF_GetLogTracking(void)
{
return do_log_tracking;
}
/* ================================================== */
int
CNF_GetLogRtc(void)
{
return do_log_rtc;
}
/* ================================================== */
int
CNF_GetLogRefclocks(void)
{
return do_log_refclocks;
}
/* ================================================== */
int
CNF_GetLogTempComp(void)
{
return do_log_tempcomp;
}
/* ================================================== */
char *
CNF_GetKeysFile(void)
{
return keys_file;
}
/* ================================================== */
double
CNF_GetRtcAutotrim(void)
{
return rtc_autotrim_threshold;
}
/* ================================================== */
char *
CNF_GetRtcFile(void)
{
return rtc_file;
}
/* ================================================== */
char *
CNF_GetRtcDevice(void)
{
return rtc_device;
}
/* ================================================== */
uint32_t
CNF_GetCommandKey(void)
{
return command_key_id;
}
/* ================================================== */
int
CNF_GetGenerateCommandKey(void)
{
return generate_command_key;
}
/* ================================================== */
int
CNF_GetDumpOnExit(void)
{
return do_dump_on_exit;
}
/* ================================================== */
double
CNF_GetMaxUpdateSkew(void)
{
return max_update_skew;
}
/* ================================================== */
double
CNF_GetMaxClockError(void)
{
return max_clock_error;
}
/* ================================================== */
double
CNF_GetCorrectionTimeRatio(void)
{
return correction_time_ratio;
}
/* ================================================== */
double
CNF_GetMaxSlewRate(void)
{
return max_slew_rate;
}
/* ================================================== */
double
CNF_GetReselectDistance(void)
{
return reselect_distance;
}
/* ================================================== */
double
CNF_GetStratumWeight(void)
{
return stratum_weight;
}
/* ================================================== */
double
CNF_GetCombineLimit(void)
{
return combine_limit;
}
/* ================================================== */
int
CNF_GetManualEnabled(void)
{
return enable_manual;
}
/* ================================================== */
int
CNF_GetCommandPort(void) {
return cmd_port;
}
/* ================================================== */
int
CNF_AllowLocalReference(int *stratum)
{
if (enable_local) {
*stratum = local_stratum;
return 1;
} else {
return 0;
}
}
/* ================================================== */
int
CNF_GetRtcOnUtc(void)
{
return rtc_on_utc;
}
/* ================================================== */
int
CNF_GetRtcSync(void)
{
return rtc_sync;
}
/* ================================================== */
void
CNF_GetMakeStep(int *limit, double *threshold)
{
*limit = make_step_limit;
*threshold = make_step_threshold;
}
/* ================================================== */
void
CNF_GetMaxChange(int *delay, int *ignore, double *offset)
{
*delay = max_offset_delay;
*ignore = max_offset_ignore;
*offset = max_offset;
}
/* ================================================== */
void
CNF_GetLogChange(int *enabled, double *threshold)
{
*enabled = do_log_change;
*threshold = log_change_threshold;
}
/* ================================================== */
void
CNF_GetMailOnChange(int *enabled, double *threshold, char **user)
{
if (mail_user_on_change) {
*enabled = 1;
*threshold = mail_change_threshold;
*user = mail_user_on_change;
} else {
*enabled = 0;
*threshold = 0.0;
*user = NULL;
}
}
/* ================================================== */
void
CNF_SetupAccessRestrictions(void)
{
AllowDeny *node;
int status;
unsigned int i;
for (i = 0; i < ARR_GetSize(ntp_restrictions); i++) {
node = ARR_GetElement(ntp_restrictions, i);
status = NCR_AddAccessRestriction(&node->ip, node->subnet_bits, node->allow, node->all);
if (!status) {
LOG_FATAL(LOGF_Configure, "Bad subnet in %s/%d", UTI_IPToString(&node->ip), node->subnet_bits);
}
}
for (i = 0; i < ARR_GetSize(cmd_restrictions); i++) {
node = ARR_GetElement(cmd_restrictions, i);
status = CAM_AddAccessRestriction(&node->ip, node->subnet_bits, node->allow, node->all);
if (!status) {
LOG_FATAL(LOGF_Configure, "Bad subnet in %s/%d", UTI_IPToString(&node->ip), node->subnet_bits);
}
}
ARR_SetSize(ntp_restrictions, 0);
ARR_SetSize(cmd_restrictions, 0);
}
/* ================================================== */
int
CNF_GetNoClientLog(void)
{
return no_client_log;
}
/* ================================================== */
unsigned long
CNF_GetClientLogLimit(void)
{
return client_log_limit;
}
/* ================================================== */
void
CNF_GetFallbackDrifts(int *min, int *max)
{
*min = fb_drift_min;
*max = fb_drift_max;
}
/* ================================================== */
void
CNF_GetBindAddress(int family, IPAddr *addr)
{
if (family == IPADDR_INET4)
*addr = bind_address4;
else if (family == IPADDR_INET6)
*addr = bind_address6;
else
addr->family = IPADDR_UNSPEC;
}
/* ================================================== */
void
CNF_GetBindAcquisitionAddress(int family, IPAddr *addr)
{
if (family == IPADDR_INET4)
*addr = bind_acq_address4;
else if (family == IPADDR_INET6)
*addr = bind_acq_address6;
else
addr->family = IPADDR_UNSPEC;
}
/* ================================================== */
void
CNF_GetBindCommandAddress(int family, IPAddr *addr)
{
if (family == IPADDR_INET4)
*addr = bind_cmd_address4;
else if (family == IPADDR_INET6)
*addr = bind_cmd_address6;
else
addr->family = IPADDR_UNSPEC;
}
/* ================================================== */
char *
CNF_GetPidFile(void)
{
return pidfile;
}
/* ================================================== */
REF_LeapMode
CNF_GetLeapSecMode(void)
{
return leapsec_mode;
}
/* ================================================== */
char *
CNF_GetLeapSecTimezone(void)
{
return leapsec_tz;
}
/* ================================================== */
int
CNF_GetSchedPriority(void)
{
return sched_priority;
}
/* ================================================== */
int
CNF_GetLockMemory(void)
{
return lock_memory;
}
/* ================================================== */
void
CNF_GetSmooth(double *max_freq, double *max_wander)
{
*max_freq = smooth_max_freq;
*max_wander = smooth_max_wander;
}
/* ================================================== */
void
CNF_GetTempComp(char **file, double *interval, char **point_file, double *T0, double *k0, double *k1, double *k2)
{
*file = tempcomp_sensor_file;
*point_file = tempcomp_point_file;
*interval = tempcomp_interval;
*T0 = tempcomp_T0;
*k0 = tempcomp_k0;
*k1 = tempcomp_k1;
*k2 = tempcomp_k2;
}
/* ================================================== */
char *
CNF_GetUser(void)
{
return user;
}
/* ================================================== */
int
CNF_GetMaxSamples(void)
{
return max_samples;
}
/* ================================================== */
int
CNF_GetMinSamples(void)
{
return min_samples;
}
/* ================================================== */
int
CNF_GetMinSources(void)
{
return min_sources;
}
/* ================================================== */
char *
CNF_GetHwclockFile(void)
{
return hwclock_file;
}
/* ================================================== */
int
CNF_GetInitSources(void)
{
return ARR_GetSize(init_sources);
}
/* ================================================== */
double
CNF_GetInitStepThreshold(void)
{
return init_slew_threshold;
}
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