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/* $OpenBSD: ntpd.h,v 1.21 2004/07/10 18:42:51 henning Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* 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 <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdarg.h>
#include "ntp.h"
#define NTPD_USER "_ntp"
#define CONFFILE "/etc/ntpd.conf"
#define READ_BUF_SIZE 65535
#define IDX2PEER_RESERVE 5
#define PFD_RESERVE 10
#define NTPD_OPT_VERBOSE 0x0001
#define NTPD_OPT_VERBOSE2 0x0002
#define INTERVAL_ADJTIME 240 /* call adjtime every n secs */
#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 QSCALE_OFF_MIN 0.05
#define QSCALE_OFF_MAX 1
#define QUERYTIME_MAX 15 /* single query might take n secs max */
#define REPLY_MAXAGE 720
#define OFFSET_ARRAY_SIZE 8
enum client_state {
STATE_NONE,
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_offset {
u_int8_t good;
double offset;
double delay;
double error;
time_t rcvd;
};
struct ntp_peer {
TAILQ_ENTRY(ntp_peer) entry;
struct ntp_addr *addr_head;
struct ntp_addr *addr;
struct ntp_query *query;
enum client_state state;
time_t next;
time_t deadline;
struct ntp_offset reply[OFFSET_ARRAY_SIZE];
struct ntp_offset update;
u_int8_t shift;
u_int8_t trustlevel;
};
struct ntpd_conf {
TAILQ_HEAD(listen_addrs, listen_addr) listen_addrs;
TAILQ_HEAD(ntp_peers, ntp_peer) ntp_peers;
u_int8_t opts;
u_int8_t listen_all;
};
struct buf {
TAILQ_ENTRY(buf) entries;
u_char *buf;
ssize_t size;
ssize_t wpos;
ssize_t rpos;
};
struct msgbuf {
u_int32_t queued;
int fd;
TAILQ_HEAD(bufs, buf) bufs;
};
struct buf_read {
u_char buf[READ_BUF_SIZE];
u_char *rptr;
ssize_t wpos;
};
/* 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
};
struct imsg_hdr {
enum imsg_type type;
u_int16_t len;
u_int32_t peerid;
pid_t pid;
};
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(ssize_t);
int buf_add(struct buf *, void *, ssize_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 *, int, u_int32_t, void *, u_int16_t);
int imsg_compose_pid(struct imsgbuf *, int, pid_t, void *, u_int16_t);
struct buf *imsg_create(struct imsgbuf *, int, u_int32_t, u_int16_t);
struct buf *imsg_create_pid(struct imsgbuf *, int, 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 *);
/* parse.y */
int parse_config(char *, struct ntpd_conf *);
int cmdline_symset(char *);
/* config.c */
int check_file_secrecy(int, const char *);
struct ntp_addr *host(const char *);
/* ntp_msg.c */
int ntp_getmsg(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 fd);
/* client.c */
int client_peer_init(struct ntp_peer *);
int client_nextaddr(struct ntp_peer *);
int client_query(struct ntp_peer *);
int client_dispatch(struct ntp_peer *);
/* util.c */
double gettime(void);
void d_to_tv(double, struct timeval *);
double lfp_to_d(struct l_fixedpt);
struct l_fixedpt d_to_lfp(double);
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