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-rw-r--r--cmdparse.c289
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+/*
+ chronyd/chronyc - Programs for keeping computer clocks accurate.
+
+ **********************************************************************
+ * Copyright (C) Richard P. Curnow 1997-2003
+ * Copyright (C) Miroslav Lichvar 2013-2014, 2016
+ *
+ * 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 for parsing various forms of directive and command lines that
+ are common to the configuration file and to the command client.
+
+ */
+
+#include "config.h"
+
+#include "sysincl.h"
+
+#include "cmdparse.h"
+#include "memory.h"
+#include "nameserv.h"
+#include "ntp.h"
+#include "util.h"
+
+/* ================================================== */
+
+int
+CPS_ParseNTPSourceAdd(char *line, CPS_NTP_Source *src)
+{
+ char *hostname, *cmd;
+ int n;
+
+ src->port = SRC_DEFAULT_PORT;
+ src->params.minpoll = SRC_DEFAULT_MINPOLL;
+ src->params.maxpoll = SRC_DEFAULT_MAXPOLL;
+ src->params.connectivity = SRC_ONLINE;
+ src->params.auto_offline = 0;
+ src->params.presend_minpoll = SRC_DEFAULT_PRESEND_MINPOLL;
+ src->params.burst = 0;
+ src->params.iburst = 0;
+ src->params.min_stratum = SRC_DEFAULT_MINSTRATUM;
+ src->params.poll_target = SRC_DEFAULT_POLLTARGET;
+ src->params.version = 0;
+ src->params.max_sources = SRC_DEFAULT_MAXSOURCES;
+ src->params.min_samples = SRC_DEFAULT_MINSAMPLES;
+ src->params.max_samples = SRC_DEFAULT_MAXSAMPLES;
+ src->params.filter_length = 0;
+ src->params.interleaved = 0;
+ src->params.sel_options = 0;
+ src->params.authkey = INACTIVE_AUTHKEY;
+ src->params.max_delay = SRC_DEFAULT_MAXDELAY;
+ src->params.max_delay_ratio = SRC_DEFAULT_MAXDELAYRATIO;
+ src->params.max_delay_dev_ratio = SRC_DEFAULT_MAXDELAYDEVRATIO;
+ src->params.min_delay = 0.0;
+ src->params.asymmetry = SRC_DEFAULT_ASYMMETRY;
+ src->params.offset = 0.0;
+
+ hostname = line;
+ line = CPS_SplitWord(line);
+
+ if (!*hostname)
+ return 0;
+
+ src->name = hostname;
+
+ /* Parse options */
+ for (; *line; line += n) {
+ cmd = line;
+ line = CPS_SplitWord(line);
+ n = 0;
+
+ if (!strcasecmp(cmd, "auto_offline")) {
+ src->params.auto_offline = 1;
+ } else if (!strcasecmp(cmd, "burst")) {
+ src->params.burst = 1;
+ } else if (!strcasecmp(cmd, "iburst")) {
+ src->params.iburst = 1;
+ } else if (!strcasecmp(cmd, "offline")) {
+ src->params.connectivity = SRC_OFFLINE;
+ } else if (!strcasecmp(cmd, "noselect")) {
+ src->params.sel_options |= SRC_SELECT_NOSELECT;
+ } else if (!strcasecmp(cmd, "prefer")) {
+ src->params.sel_options |= SRC_SELECT_PREFER;
+ } else if (!strcasecmp(cmd, "require")) {
+ src->params.sel_options |= SRC_SELECT_REQUIRE;
+ } else if (!strcasecmp(cmd, "trust")) {
+ src->params.sel_options |= SRC_SELECT_TRUST;
+ } else if (!strcasecmp(cmd, "key")) {
+ if (sscanf(line, "%"SCNu32"%n", &src->params.authkey, &n) != 1 ||
+ src->params.authkey == INACTIVE_AUTHKEY)
+ return 0;
+ } else if (!strcasecmp(cmd, "asymmetry")) {
+ if (sscanf(line, "%lf%n", &src->params.asymmetry, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "filter")) {
+ if (sscanf(line, "%d%n", &src->params.filter_length, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "maxdelay")) {
+ if (sscanf(line, "%lf%n", &src->params.max_delay, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "maxdelayratio")) {
+ if (sscanf(line, "%lf%n", &src->params.max_delay_ratio, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "maxdelaydevratio")) {
+ if (sscanf(line, "%lf%n", &src->params.max_delay_dev_ratio, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "maxpoll")) {
+ if (sscanf(line, "%d%n", &src->params.maxpoll, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "maxsamples")) {
+ if (sscanf(line, "%d%n", &src->params.max_samples, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "maxsources")) {
+ if (sscanf(line, "%d%n", &src->params.max_sources, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "mindelay")) {
+ if (sscanf(line, "%lf%n", &src->params.min_delay, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "minpoll")) {
+ if (sscanf(line, "%d%n", &src->params.minpoll, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "minsamples")) {
+ if (sscanf(line, "%d%n", &src->params.min_samples, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "minstratum")) {
+ if (sscanf(line, "%d%n", &src->params.min_stratum, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "offset")) {
+ if (sscanf(line, "%lf%n", &src->params.offset, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "port")) {
+ if (sscanf(line, "%hu%n", &src->port, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "polltarget")) {
+ if (sscanf(line, "%d%n", &src->params.poll_target, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "presend")) {
+ if (sscanf(line, "%d%n", &src->params.presend_minpoll, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "version")) {
+ if (sscanf(line, "%d%n", &src->params.version, &n) != 1)
+ return 0;
+ } else if (!strcasecmp(cmd, "xleave")) {
+ src->params.interleaved = 1;
+ } else {
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+/* ================================================== */
+
+int
+CPS_ParseLocal(char *line, int *stratum, int *orphan, double *distance)
+{
+ int n;
+ char *cmd;
+
+ *stratum = 10;
+ *distance = 1.0;
+ *orphan = 0;
+
+ while (*line) {
+ cmd = line;
+ line = CPS_SplitWord(line);
+
+ if (!strcasecmp(cmd, "stratum")) {
+ if (sscanf(line, "%d%n", stratum, &n) != 1 ||
+ *stratum >= NTP_MAX_STRATUM || *stratum <= 0)
+ return 0;
+ } else if (!strcasecmp(cmd, "orphan")) {
+ *orphan = 1;
+ n = 0;
+ } else if (!strcasecmp(cmd, "distance")) {
+ if (sscanf(line, "%lf%n", distance, &n) != 1)
+ return 0;
+ } else {
+ return 0;
+ }
+
+ line += n;
+ }
+
+ return 1;
+}
+
+/* ================================================== */
+
+void
+CPS_NormalizeLine(char *line)
+{
+ char *p, *q;
+ int space = 1, first = 1;
+
+ /* Remove white-space at beginning and replace white-spaces with space char */
+ for (p = q = line; *p; p++) {
+ if (isspace((unsigned char)*p)) {
+ if (!space)
+ *q++ = ' ';
+ space = 1;
+ continue;
+ }
+
+ /* Discard comment lines */
+ if (first && strchr("!;#%", *p))
+ break;
+
+ *q++ = *p;
+ space = first = 0;
+ }
+
+ /* Strip trailing space */
+ if (q > line && q[-1] == ' ')
+ q--;
+
+ *q = '\0';
+}
+
+/* ================================================== */
+
+char *
+CPS_SplitWord(char *line)
+{
+ char *p = line, *q = line;
+
+ /* Skip white-space before the word */
+ while (*q && isspace((unsigned char)*q))
+ q++;
+
+ /* Move the word to the beginning */
+ while (*q && !isspace((unsigned char)*q))
+ *p++ = *q++;
+
+ /* Find the next word */
+ while (*q && isspace((unsigned char)*q))
+ q++;
+
+ *p = '\0';
+
+ /* Return pointer to the next word or NUL */
+ return q;
+}
+
+/* ================================================== */
+
+int
+CPS_ParseKey(char *line, uint32_t *id, const char **hash, char **key)
+{
+ char *s1, *s2, *s3, *s4;
+
+ s1 = line;
+ s2 = CPS_SplitWord(s1);
+ s3 = CPS_SplitWord(s2);
+ s4 = CPS_SplitWord(s3);
+
+ /* Require two or three words */
+ if (!*s2 || *s4)
+ return 0;
+
+ if (sscanf(s1, "%"SCNu32, id) != 1)
+ return 0;
+
+ if (*s3) {
+ *hash = s2;
+ *key = s3;
+ } else {
+ *hash = "MD5";
+ *key = s2;
+ }
+
+ return 1;
+}
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