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
|
/*
* Copyright (c) 2000 Ben Smithurst <ben@scientia.demon.co.uk>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* \summary: Berkeley UNIX Time Synchronization Protocol */
/* specification: https://docs.freebsd.org/44doc/smm/12.timed/paper.pdf */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "extract.h"
struct tsp_timeval {
nd_int32_t tv_sec;
nd_int32_t tv_usec;
};
struct tsp {
nd_uint8_t tsp_type;
nd_uint8_t tsp_vers;
nd_uint16_t tsp_seq;
union {
struct tsp_timeval tspu_time;
nd_int8_t tspu_hopcnt;
} tsp_u;
nd_byte tsp_name[256]; /* null-terminated string up to 256 */
};
#define tsp_time tsp_u.tspu_time
#define tsp_hopcnt tsp_u.tspu_hopcnt
/*
* Command types.
*/
#define TSP_ANY 0 /* match any types */
#define TSP_ADJTIME 1 /* send adjtime */
#define TSP_ACK 2 /* generic acknowledgement */
#define TSP_MASTERREQ 3 /* ask for master's name */
#define TSP_MASTERACK 4 /* acknowledge master request */
#define TSP_SETTIME 5 /* send network time */
#define TSP_MASTERUP 6 /* inform slaves that master is up */
#define TSP_SLAVEUP 7 /* slave is up but not polled */
#define TSP_ELECTION 8 /* advance candidature for master */
#define TSP_ACCEPT 9 /* support candidature of master */
#define TSP_REFUSE 10 /* reject candidature of master */
#define TSP_CONFLICT 11 /* two or more masters present */
#define TSP_RESOLVE 12 /* masters' conflict resolution */
#define TSP_QUIT 13 /* reject candidature if master is up */
#define TSP_DATE 14 /* reset the time (date command) */
#define TSP_DATEREQ 15 /* remote request to reset the time */
#define TSP_DATEACK 16 /* acknowledge time setting */
#define TSP_TRACEON 17 /* turn tracing on */
#define TSP_TRACEOFF 18 /* turn tracing off */
#define TSP_MSITE 19 /* find out master's site */
#define TSP_MSITEREQ 20 /* remote master's site request */
#define TSP_TEST 21 /* for testing election algo */
#define TSP_SETDATE 22 /* New from date command */
#define TSP_SETDATEREQ 23 /* New remote for above */
#define TSP_LOOP 24 /* loop detection packet */
static const struct tok tsptype_str[] = {
{ TSP_ANY, "TSP_ANY" },
{ TSP_ADJTIME, "TSP_ADJTIME" },
{ TSP_ACK, "TSP_ACK" },
{ TSP_MASTERREQ, "TSP_MASTERREQ" },
{ TSP_MASTERACK, "TSP_MASTERACK" },
{ TSP_SETTIME, "TSP_SETTIME" },
{ TSP_MASTERUP, "TSP_MASTERUP" },
{ TSP_SLAVEUP, "TSP_SLAVEUP" },
{ TSP_ELECTION, "TSP_ELECTION" },
{ TSP_ACCEPT, "TSP_ACCEPT" },
{ TSP_REFUSE, "TSP_REFUSE" },
{ TSP_CONFLICT, "TSP_CONFLICT" },
{ TSP_RESOLVE, "TSP_RESOLVE" },
{ TSP_QUIT, "TSP_QUIT" },
{ TSP_DATE, "TSP_DATE" },
{ TSP_DATEREQ, "TSP_DATEREQ" },
{ TSP_DATEACK, "TSP_DATEACK" },
{ TSP_TRACEON, "TSP_TRACEON" },
{ TSP_TRACEOFF, "TSP_TRACEOFF" },
{ TSP_MSITE, "TSP_MSITE" },
{ TSP_MSITEREQ, "TSP_MSITEREQ" },
{ TSP_TEST, "TSP_TEST" },
{ TSP_SETDATE, "TSP_SETDATE" },
{ TSP_SETDATEREQ, "TSP_SETDATEREQ" },
{ TSP_LOOP, "TSP_LOOP" },
{ 0, NULL }
};
void
timed_print(netdissect_options *ndo,
const u_char *bp)
{
const struct tsp *tsp = (const struct tsp *)bp;
uint8_t tsp_type;
int sec, usec;
ndo->ndo_protocol = "timed";
tsp_type = GET_U_1(tsp->tsp_type);
ND_PRINT("%s", tok2str(tsptype_str, "(tsp_type %#x)", tsp_type));
ND_PRINT(" vers %u", GET_U_1(tsp->tsp_vers));
ND_PRINT(" seq %u", GET_BE_U_2(tsp->tsp_seq));
switch (tsp_type) {
case TSP_LOOP:
ND_PRINT(" hopcnt %u", GET_U_1(tsp->tsp_hopcnt));
break;
case TSP_SETTIME:
case TSP_ADJTIME:
case TSP_SETDATE:
case TSP_SETDATEREQ:
sec = GET_BE_S_4(tsp->tsp_time.tv_sec);
usec = GET_BE_S_4(tsp->tsp_time.tv_usec);
/* XXX The comparison below is always false? */
if (usec < 0)
/* invalid, skip the rest of the packet */
return;
ND_PRINT(" time ");
if (sec < 0 && usec != 0) {
sec++;
if (sec == 0)
ND_PRINT("-");
usec = 1000000 - usec;
}
ND_PRINT("%d.%06d", sec, usec);
break;
}
ND_PRINT(" name ");
nd_printjnp(ndo, tsp->tsp_name, sizeof(tsp->tsp_name));
}
|
