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/* $OpenBSD: ntpd.h,v 1.149 2020/02/12 19:14:56 otto Exp $ */
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/*
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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* Copyright (c) 2012 Mike Miller <mmiller@mgm51.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/socket.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <poll.h>
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#include <imsg.h>
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#include "ntp.h"
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#include "log.h"
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#define MAXIMUM(a, b) ((a) > (b) ? (a) : (b))
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#define NTPD_USER "_ntp"
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#define CONFFILE "/etc/ntpd.conf"
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#define DRIFTFILE "/var/db/ntpd.drift"
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#define CTLSOCKET "/var/run/ntpd.sock"
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#define INTERVAL_QUERY_NORMAL 30 /* sync to peers every n secs */
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#define INTERVAL_QUERY_PATHETIC 60
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#define INTERVAL_QUERY_AGGRESSIVE 5
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#define INTERVAL_QUERY_ULTRA_VIOLENCE 1 /* used at startup for auto */
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#define TRUSTLEVEL_BADPEER 6
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#define TRUSTLEVEL_PATHETIC 2
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#define TRUSTLEVEL_AGGRESSIVE 8
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#define TRUSTLEVEL_MAX 10
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#define MAX_SERVERS_DNS 8
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#define QSCALE_OFF_MIN 0.001
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#define QSCALE_OFF_MAX 0.050
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#define QUERYTIME_MAX 15 /* single query might take n secs max */
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#define OFFSET_ARRAY_SIZE 8
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#define SENSOR_OFFSETS 6
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#define SETTIME_TIMEOUT 15 /* max seconds to wait with -s */
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#define LOG_NEGLIGIBLE_ADJTIME 32 /* negligible drift to not log (ms) */
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#define LOG_NEGLIGIBLE_ADJFREQ 0.05 /* negligible rate to not log (ppm) */
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#define FREQUENCY_SAMPLES 8 /* samples for est. of permanent drift */
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#define MAX_FREQUENCY_ADJUST 128e-5 /* max correction per iteration */
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#define MAX_SEND_ERRORS 3 /* max send errors before reconnect */
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#define MAX_DISPLAY_WIDTH 80 /* max chars in ctl_show report line */
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#define FILTER_ADJFREQ 0x01 /* set after doing adjfreq */
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#define AUTO_REPLIES 4 /* # of ntp replies we want for auto */
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#define AUTO_THRESHOLD 60 /* dont bother auto setting < this */
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#define INTERVAL_AUIO_DNSFAIL 1 /* DNS tmpfail interval for auto */
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#define TRIES_AUTO_DNSFAIL 4 /* DNS tmpfail quick retries */
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#define SENSOR_DATA_MAXAGE (15*60)
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#define SENSOR_QUERY_INTERVAL 15
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#define SENSOR_QUERY_INTERVAL_SETTIME (SETTIME_TIMEOUT/3)
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#define SENSOR_SCAN_INTERVAL (1*60)
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#define SENSOR_DEFAULT_REFID "HARD"
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#define CONSTRAINT_ERROR_MARGIN (4)
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#define CONSTRAINT_RETRY_INTERVAL (15)
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#define CONSTRAINT_SCAN_INTERVAL (15*60)
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#define CONSTRAINT_SCAN_TIMEOUT (10)
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#define CONSTRAINT_MARGIN (2.0*60)
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#define CONSTRAINT_PORT "443" /* HTTPS port */
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#define CONSTRAINT_MAXHEADERLENGTH 8192
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#define CONSTRAINT_PASSFD (STDERR_FILENO + 1)
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#define PARENT_SOCK_FILENO CONSTRAINT_PASSFD
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#define NTP_PROC_NAME "ntp_main"
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#define NTPDNS_PROC_NAME "ntp_dns"
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#define CONSTRAINT_PROC_NAME "constraint"
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enum client_state {
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STATE_NONE,
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STATE_DNS_INPROGRESS,
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STATE_DNS_TEMPFAIL,
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STATE_DNS_DONE,
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STATE_QUERY_SENT,
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STATE_REPLY_RECEIVED,
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STATE_TIMEOUT,
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STATE_INVALID
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};
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struct listen_addr {
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TAILQ_ENTRY(listen_addr) entry;
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struct sockaddr_storage sa;
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int fd;
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int rtable;
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};
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struct ntp_addr {
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struct ntp_addr *next;
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struct sockaddr_storage ss;
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int notauth;
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};
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struct ntp_addr_wrap {
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char *name;
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char *path;
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struct ntp_addr *a;
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u_int8_t pool;
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};
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struct ntp_addr_msg {
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struct ntp_addr a;
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size_t namelen;
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size_t pathlen;
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};
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struct ntp_status {
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double rootdelay;
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double rootdispersion;
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double reftime;
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u_int32_t refid;
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u_int32_t send_refid;
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u_int8_t synced;
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u_int8_t leap;
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int8_t precision;
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u_int8_t poll;
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u_int8_t stratum;
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};
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struct ntp_offset {
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struct ntp_status status;
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double offset;
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double delay;
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double error;
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time_t rcvd;
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u_int8_t good;
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};
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struct ntp_peer {
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TAILQ_ENTRY(ntp_peer) entry;
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struct ntp_addr_wrap addr_head;
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struct ntp_addr *addr;
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struct ntp_query *query;
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struct ntp_offset reply[OFFSET_ARRAY_SIZE];
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struct ntp_offset update;
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struct sockaddr_in query_addr4;
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struct sockaddr_in6 query_addr6;
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enum client_state state;
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time_t next;
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time_t deadline;
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time_t poll;
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u_int32_t id;
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u_int8_t shift;
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u_int8_t trustlevel;
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u_int8_t weight;
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u_int8_t trusted;
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int lasterror;
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int senderrors;
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};
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struct ntp_sensor {
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TAILQ_ENTRY(ntp_sensor) entry;
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struct ntp_offset offsets[SENSOR_OFFSETS];
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struct ntp_offset update;
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time_t next;
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time_t last;
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char *device;
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u_int32_t refid;
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int sensordevid;
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int correction;
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u_int8_t stratum;
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u_int8_t weight;
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u_int8_t shift;
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u_int8_t trusted;
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};
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struct constraint {
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TAILQ_ENTRY(constraint) entry;
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struct ntp_addr_wrap addr_head;
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struct ntp_addr *addr;
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int senderrors;
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enum client_state state;
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u_int32_t id;
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int fd;
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pid_t pid;
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struct imsgbuf ibuf;
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time_t last;
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time_t constraint;
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int dnstries;
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};
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struct ntp_conf_sensor {
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TAILQ_ENTRY(ntp_conf_sensor) entry;
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char *device;
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char *refstr;
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int correction;
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u_int8_t stratum;
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u_int8_t weight;
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u_int8_t trusted;
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};
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struct ntp_freq {
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double overall_offset;
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double x, y;
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double xx, xy;
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int samples;
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u_int num;
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};
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struct ntpd_conf {
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TAILQ_HEAD(listen_addrs, listen_addr) listen_addrs;
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TAILQ_HEAD(ntp_peers, ntp_peer) ntp_peers;
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TAILQ_HEAD(ntp_sensors, ntp_sensor) ntp_sensors;
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TAILQ_HEAD(ntp_conf_sensors, ntp_conf_sensor) ntp_conf_sensors;
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TAILQ_HEAD(constraints, constraint) constraints;
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struct ntp_status status;
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struct ntp_freq freq;
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struct sockaddr_in query_addr4;
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struct sockaddr_in6 query_addr6;
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u_int32_t scale;
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int debug;
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int verbose;
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u_int8_t listen_all;
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u_int8_t settime;
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u_int8_t automatic;
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u_int8_t noaction;
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u_int8_t filters;
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u_int8_t trusted_peers;
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u_int8_t trusted_sensors;
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time_t constraint_last;
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time_t constraint_median;
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u_int constraint_errors;
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u_int8_t *ca;
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size_t ca_len;
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int tmpfail;
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};
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struct ctl_show_status {
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time_t constraint_median;
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time_t constraint_last;
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double clock_offset;
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u_int peercnt;
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u_int sensorcnt;
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u_int valid_peers;
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u_int valid_sensors;
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u_int constraint_errors;
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u_int8_t synced;
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u_int8_t stratum;
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u_int8_t constraints;
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};
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struct ctl_show_peer {
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char peer_desc[MAX_DISPLAY_WIDTH];
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u_int8_t syncedto;
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u_int8_t weight;
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u_int8_t trustlevel;
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u_int8_t stratum;
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time_t next;
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time_t poll;
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double offset;
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double delay;
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double jitter;
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};
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struct ctl_show_sensor {
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char sensor_desc[MAX_DISPLAY_WIDTH];
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u_int8_t syncedto;
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u_int8_t weight;
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u_int8_t good;
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u_int8_t stratum;
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time_t next;
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time_t poll;
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double offset;
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double correction;
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};
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struct ctl_conn {
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TAILQ_ENTRY(ctl_conn) entry;
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struct imsgbuf ibuf;
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};
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TAILQ_HEAD(ctl_conns, ctl_conn) ;
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enum imsg_type {
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IMSG_NONE,
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IMSG_ADJTIME,
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IMSG_ADJFREQ,
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IMSG_SETTIME,
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IMSG_HOST_DNS,
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IMSG_CONSTRAINT_DNS,
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IMSG_CONSTRAINT_QUERY,
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IMSG_CONSTRAINT_RESULT,
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IMSG_CONSTRAINT_CLOSE,
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IMSG_CONSTRAINT_KILL,
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IMSG_CTL_SHOW_STATUS,
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IMSG_CTL_SHOW_PEERS,
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IMSG_CTL_SHOW_PEERS_END,
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IMSG_CTL_SHOW_SENSORS,
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IMSG_CTL_SHOW_SENSORS_END,
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IMSG_CTL_SHOW_ALL,
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IMSG_CTL_SHOW_ALL_END,
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IMSG_SYNCED,
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IMSG_UNSYNCED,
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IMSG_PROBE_ROOT
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};
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enum ctl_actions {
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CTL_SHOW_STATUS,
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CTL_SHOW_PEERS,
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CTL_SHOW_SENSORS,
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CTL_SHOW_ALL
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};
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/* prototypes */
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/* ntp.c */
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void ntp_main(struct ntpd_conf *, struct passwd *, int, char **);
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void peer_addr_head_clear(struct ntp_peer *);
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int priv_adjtime(void);
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void priv_settime(double, char *);
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void priv_dns(int, char *, u_int32_t);
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int offset_compare(const void *, const void *);
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void update_scale(double);
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time_t scale_interval(time_t);
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time_t error_interval(void);
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extern struct ntpd_conf *conf;
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extern struct ctl_conns ctl_conns;
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/* parse.y */
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int parse_config(const char *, struct ntpd_conf *);
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/* config.c */
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void host(const char *, struct ntp_addr **);
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int host_dns(const char *, int, struct ntp_addr **);
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void host_dns_free(struct ntp_addr *);
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struct ntp_peer *new_peer(void);
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struct ntp_conf_sensor *new_sensor(char *);
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struct constraint *new_constraint(void);
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/* ntp_msg.c */
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int ntp_getmsg(struct sockaddr *, char *, ssize_t, struct ntp_msg *);
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int ntp_sendmsg(int, struct sockaddr *, struct ntp_msg *);
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/* server.c */
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int setup_listeners(struct servent *, struct ntpd_conf *, u_int *);
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int ntp_reply(int, struct sockaddr *, struct ntp_msg *, int);
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int server_dispatch(int, struct ntpd_conf *);
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/* client.c */
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int client_peer_init(struct ntp_peer *);
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int client_addr_init(struct ntp_peer *);
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int client_nextaddr(struct ntp_peer *);
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int client_query(struct ntp_peer *);
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int client_dispatch(struct ntp_peer *, u_int8_t, u_int8_t);
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void client_log_error(struct ntp_peer *, const char *, int);
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void set_next(struct ntp_peer *, time_t);
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/* constraint.c */
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void constraint_add(struct constraint *);
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void constraint_remove(struct constraint *);
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void constraint_purge(void);
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void constraint_reset(void);
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int constraint_init(struct constraint *);
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int constraint_query(struct constraint *);
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int constraint_check(double);
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void constraint_msg_dns(u_int32_t, u_int8_t *, size_t);
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void constraint_msg_result(u_int32_t, u_int8_t *, size_t);
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void constraint_msg_close(u_int32_t, u_int8_t *, size_t);
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void priv_constraint_msg(u_int32_t, u_int8_t *, size_t, int, char **);
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void priv_constraint_child(const char *, uid_t, gid_t);
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void priv_constraint_kill(u_int32_t);
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int priv_constraint_dispatch(struct pollfd *);
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void priv_constraint_check_child(pid_t, int);
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char *get_string(u_int8_t *, size_t);
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/* util.c */
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double gettime_corrected(void);
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double gettime_from_timeval(struct timeval *);
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double getoffset(void);
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double gettime(void);
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time_t getmonotime(void);
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void d_to_tv(double, struct timeval *);
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double lfp_to_d(struct l_fixedpt);
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struct l_fixedpt d_to_lfp(double);
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double sfp_to_d(struct s_fixedpt);
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struct s_fixedpt d_to_sfp(double);
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char *print_rtable(int);
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const char *log_sockaddr(struct sockaddr *);
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pid_t start_child(char *, int, int, char **);
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int sanitize_argv(int *, char ***);
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/* sensors.c */
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void sensor_init(void);
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int sensor_scan(void);
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void sensor_query(struct ntp_sensor *);
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/* ntp_dns.c */
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void ntp_dns(struct ntpd_conf *, struct passwd *);
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/* control.c */
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int control_check(char *);
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int control_init(char *);
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int control_listen(int);
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void control_shutdown(int);
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int control_accept(int);
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struct ctl_conn *control_connbyfd(int);
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int control_close(int);
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int control_dispatch_msg(struct pollfd *, u_int *);
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void session_socket_nonblockmode(int);
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void build_show_status(struct ctl_show_status *);
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void build_show_peer(struct ctl_show_peer *,
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struct ntp_peer *);
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void build_show_sensor(struct ctl_show_sensor *,
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struct ntp_sensor *);
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