1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* $OpenBSD: ntpd.h,v 1.7 2004/06/18 04:51:31 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/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
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_peer {
TAILQ_ENTRY(ntp_peer) entry;
struct sockaddr_storage ss;
struct ntp_query *query;
enum client_state state;
time_t next;
time_t deadline;
};
struct ntpd_conf {
TAILQ_HEAD(listen_addrs, listen_addr) listen_addrs;
TAILQ_HEAD(ntp_peers, ntp_peer) ntp_peers;
u_int8_t opts;
};
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
};
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 *);
int host(const char *, struct sockaddr *, u_int8_t *);
/* ntp_msg.c */
void get_ts(struct l_fixedpt *);
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);
/* client.c */
int client_peer_init(struct ntp_peer *);
int client_query(struct ntp_peer *);
int client_dispatch(struct ntp_peer *);
|
