/* $OpenBSD: ntpd.h,v 1.78 2006/10/27 12:22:41 henning Exp $ */ /* * Copyright (c) 2003, 2004 Henning Brauer * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include "ntp.h" #define NTPD_USER "_ntp" #define CONFFILE "/etc/ntpd.conf" #define DRIFTFILE "/var/db/ntpd.drift" #define READ_BUF_SIZE 4096 #define NTPD_OPT_VERBOSE 0x0001 #define NTPD_OPT_VERBOSE2 0x0002 #define INTERVAL_QUERY_NORMAL 30 /* sync to peers every n secs */ #define INTERVAL_QUERY_PATHETIC 60 #define INTERVAL_QUERY_AGRESSIVE 5 #define TRUSTLEVEL_BADPEER 6 #define TRUSTLEVEL_PATHETIC 2 #define TRUSTLEVEL_AGRESSIVE 8 #define TRUSTLEVEL_MAX 10 #define MAX_SERVERS_DNS 8 #define QSCALE_OFF_MIN 0.001 #define QSCALE_OFF_MAX 0.050 #define QUERYTIME_MAX 15 /* single query might take n secs max */ #define OFFSET_ARRAY_SIZE 8 #define SENSOR_OFFSETS 7 #define SETTIME_MIN_OFFSET 180 /* min offset for settime at start */ #define SETTIME_TIMEOUT 15 /* max seconds to wait with -s */ #define LOG_NEGLIGEE 32 /* negligible drift to not log (ms) */ #define FREQUENCY_SAMPLES 8 /* samples for est. of permanent drift */ #define MAX_FREQUENCY_ADJUST 128e-5 /* max correction per iteration */ #define SENSOR_DATA_MAXAGE (15*60) #define SENSOR_QUERY_INTERVAL 5 #define SENSOR_SCAN_INTERVAL (5*60) enum client_state { STATE_NONE, STATE_DNS_INPROGRESS, STATE_DNS_TEMPFAIL, STATE_DNS_DONE, STATE_QUERY_SENT, STATE_REPLY_RECEIVED }; struct listen_addr { TAILQ_ENTRY(listen_addr) entry; struct sockaddr_storage sa; int fd; }; struct ntp_addr { struct ntp_addr *next; struct sockaddr_storage ss; }; struct ntp_addr_wrap { char *name; struct ntp_addr *a; u_int8_t pool; }; struct ntp_status { double rootdelay; double rootdispersion; double reftime; u_int32_t refid; u_int32_t refid4; u_int32_t send_refid; u_int8_t synced; u_int8_t leap; int8_t precision; u_int8_t poll; u_int8_t stratum; }; struct ntp_offset { struct ntp_status status; double offset; double delay; double error; time_t rcvd; u_int8_t good; }; struct ntp_peer { TAILQ_ENTRY(ntp_peer) entry; struct ntp_addr_wrap addr_head; struct ntp_addr *addr; struct ntp_query *query; struct ntp_offset reply[OFFSET_ARRAY_SIZE]; struct ntp_offset update; enum client_state state; time_t next; time_t deadline; u_int32_t id; u_int8_t shift; u_int8_t trustlevel; u_int8_t weight; int lasterror; }; struct ntp_sensor { TAILQ_ENTRY(ntp_sensor) entry; struct ntp_offset offsets[SENSOR_OFFSETS]; struct ntp_offset update; time_t next; char *device; int sensorid; u_int8_t weight; u_int8_t shift; }; struct ntp_conf_sensor { TAILQ_ENTRY(ntp_conf_sensor) entry; char *device; u_int8_t weight; }; struct ntp_freq { double overall_offset; double x, y; double xx, xy; int samples; u_int num; }; struct ntpd_conf { TAILQ_HEAD(listen_addrs, listen_addr) listen_addrs; TAILQ_HEAD(ntp_peers, ntp_peer) ntp_peers; TAILQ_HEAD(ntp_sensors, ntp_sensor) ntp_sensors; TAILQ_HEAD(ntp_conf_sensors, ntp_conf_sensor) ntp_conf_sensors; struct ntp_status status; struct ntp_freq freq; u_int8_t listen_all; u_int8_t settime; u_int8_t debug; u_int32_t scale; }; struct buf { TAILQ_ENTRY(buf) entry; u_char *buf; size_t size; size_t wpos; size_t rpos; }; struct msgbuf { TAILQ_HEAD(, buf) bufs; u_int32_t queued; int fd; }; struct buf_read { size_t wpos; u_char buf[READ_BUF_SIZE]; u_char *rptr; }; /* ipc messages */ #define IMSG_HEADER_SIZE sizeof(struct imsg_hdr) #define MAX_IMSGSIZE 8192 struct imsgbuf { int fd; pid_t pid; struct buf_read r; struct msgbuf w; }; enum imsg_type { IMSG_NONE, IMSG_ADJTIME, IMSG_ADJFREQ, IMSG_SETTIME, IMSG_HOST_DNS }; struct imsg_hdr { enum imsg_type type; u_int32_t peerid; pid_t pid; u_int16_t len; }; struct imsg { struct imsg_hdr hdr; void *data; }; /* prototypes */ /* log.c */ void log_init(int); void vlog(int, const char *, va_list); void log_warn(const char *, ...); void log_warnx(const char *, ...); void log_info(const char *, ...); void log_debug(const char *, ...); void fatal(const char *); void fatalx(const char *); const char * log_sockaddr(struct sockaddr *); /* buffer.c */ struct buf *buf_open(size_t); int buf_add(struct buf *, void *, size_t); int buf_close(struct msgbuf *, struct buf *); void buf_free(struct buf *); void msgbuf_init(struct msgbuf *); void msgbuf_clear(struct msgbuf *); int msgbuf_write(struct msgbuf *); /* imsg.c */ void imsg_init(struct imsgbuf *, int); int imsg_read(struct imsgbuf *); int imsg_get(struct imsgbuf *, struct imsg *); int imsg_compose(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t, void *, u_int16_t); struct buf *imsg_create(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t, u_int16_t); int imsg_add(struct buf *, void *, u_int16_t); int imsg_close(struct imsgbuf *, struct buf *); void imsg_free(struct imsg *); /* ntp.c */ pid_t ntp_main(int[2], struct ntpd_conf *); int priv_adjtime(void); void priv_settime(double); void priv_host_dns(char *, u_int32_t); int offset_compare(const void *, const void *); /* parse.y */ int parse_config(const char *, struct ntpd_conf *); /* config.c */ int host(const char *, struct ntp_addr **); int host_dns(const char *, struct ntp_addr **); struct ntp_peer *new_peer(void); struct ntp_conf_sensor *new_sensor(char *); /* ntp_msg.c */ int ntp_getmsg(struct sockaddr *, char *, ssize_t, struct ntp_msg *); int ntp_sendmsg(int, struct sockaddr *, struct ntp_msg *, ssize_t, int); /* server.c */ int setup_listeners(struct servent *, struct ntpd_conf *, u_int *); int ntp_reply(int, struct sockaddr *, struct ntp_msg *, int); int server_dispatch(int, struct ntpd_conf *); /* client.c */ int client_peer_init(struct ntp_peer *); int client_addr_init(struct ntp_peer *); int client_nextaddr(struct ntp_peer *); int client_query(struct ntp_peer *); int client_dispatch(struct ntp_peer *, u_int8_t); void client_log_error(struct ntp_peer *, const char *, int); void update_scale(double); time_t scale_interval(time_t); time_t error_interval(void); void set_next(struct ntp_peer *, time_t); /* util.c */ double gettime_corrected(void); double getoffset(void); double gettime(void); time_t getmonotime(void); void d_to_tv(double, struct timeval *); double lfp_to_d(struct l_fixedpt); struct l_fixedpt d_to_lfp(double); double sfp_to_d(struct s_fixedpt); struct s_fixedpt d_to_sfp(double); /* sensors.c */ void sensor_init(struct ntpd_conf *); void sensor_scan(void); void sensor_query(struct ntp_sensor *); int sensor_hotplugfd(void); void sensor_hotplugevent(int);