1/*
2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Format and print ntp packets.
22 * By Jeffrey Mogul/DECWRL
23 * loosely based on print-bootp.c
24 *
25 * $FreeBSD: head/contrib/tcpdump/print-ntp.c 127675 2004-03-31 14:57:24Z bms $
26 */
27
28#ifndef lint
29static const char rcsid[] _U_ =
30 "@(#) $Header: /tcpdump/master/tcpdump/print-ntp.c,v 1.37.2.2 2003/11/16 08:51:36 guy Exp $ (LBL)";
31#endif
32
33#ifdef HAVE_CONFIG_H
34#include "config.h"
35#endif
36
37#include <tcpdump-stdinc.h>
38
39#include <stdio.h>
40#include <string.h>
41#ifdef HAVE_STRFTIME
42#include <time.h>
43#endif
44
45#include "interface.h"
46#include "addrtoname.h"
47#include "extract.h"
48#ifdef MODEMASK
49#undef MODEMASK /* Solaris sucks */
50#endif
51#include "ntp.h"
52
53static void p_sfix(const struct s_fixedpt *);
54static void p_ntp_time(const struct l_fixedpt *);
55static void p_ntp_delta(const struct l_fixedpt *, const struct l_fixedpt *);
56
57/*
58 * Print ntp requests
59 */
60void
61ntp_print(register const u_char *cp, u_int length)
62{
63 register const struct ntpdata *bp;
64 int mode, version, leapind;
65
66 bp = (struct ntpdata *)cp;
67 /* Note funny sized packets */
68 if (length != sizeof(struct ntpdata))
69 (void)printf(" [len=%d]", length);
70
71 TCHECK(bp->status);
72
73 version = (int)(bp->status & VERSIONMASK) >> 3;
74 printf("NTPv%d", version);
75
76 leapind = bp->status & LEAPMASK;
77 switch (leapind) {
78
79 case NO_WARNING:
80 break;
81
82 case PLUS_SEC:
83 fputs(" +1s", stdout);
84 break;
85
86 case MINUS_SEC:
87 fputs(" -1s", stdout);
88 break;
89 }
90
91 mode = bp->status & MODEMASK;
92 switch (mode) {
93
94 case MODE_UNSPEC: /* unspecified */
95 fputs(" unspec", stdout);
96 break;
97
98 case MODE_SYM_ACT: /* symmetric active */
99 fputs(" sym_act", stdout);
100 break;
101
102 case MODE_SYM_PAS: /* symmetric passive */
103 fputs(" sym_pas", stdout);
104 break;
105
106 case MODE_CLIENT: /* client */
107 fputs(" client", stdout);
108 break;
109
110 case MODE_SERVER: /* server */
111 fputs(" server", stdout);
112 break;
113
114 case MODE_BROADCAST: /* broadcast */
115 fputs(" bcast", stdout);
116 break;
117
118 case MODE_RES1: /* reserved */
119 fputs(" res1", stdout);
120 break;
121
122 case MODE_RES2: /* reserved */
123 fputs(" res2", stdout);
124 break;
125
126 }
127
128 TCHECK(bp->stratum);
129 printf(", strat %d", bp->stratum);
130
131 TCHECK(bp->ppoll);
132 printf(", poll %d", bp->ppoll);
133
134 /* Can't TCHECK bp->precision bitfield so bp->distance + 0 instead */
135 TCHECK2(bp->distance, 0);
136 printf(", prec %d", bp->precision);
137
138 if (!vflag)
139 return;
140
141 TCHECK(bp->distance);
142 fputs(" dist ", stdout);
143 p_sfix(&bp->distance);
144
145 TCHECK(bp->dispersion);
146 fputs(", disp ", stdout);
147 p_sfix(&bp->dispersion);
148
149 TCHECK(bp->refid);
150 fputs(", ref ", stdout);
151 /* Interpretation depends on stratum */
152 switch (bp->stratum) {
153
154 case UNSPECIFIED:
155 printf("(unspec)");
156 break;
157
158 case PRIM_REF:
159 fn_printn((u_char *)&(bp->refid), 4, NULL);
160 break;
161
162 case INFO_QUERY:
163 printf("%s INFO_QUERY", ipaddr_string(&(bp->refid)));
164 /* this doesn't have more content */
165 return;
166
167 case INFO_REPLY:
168 printf("%s INFO_REPLY", ipaddr_string(&(bp->refid)));
169 /* this is too complex to be worth printing */
170 return;
171
172 default:
173 printf("%s", ipaddr_string(&(bp->refid)));
174 break;
175 }
176
177 TCHECK(bp->reftime);
178 putchar('@');
179 p_ntp_time(&(bp->reftime));
180
181 TCHECK(bp->org);
182 fputs(" orig ", stdout);
183 p_ntp_time(&(bp->org));
184
185 TCHECK(bp->rec);
186 fputs(" rec ", stdout);
187 p_ntp_delta(&(bp->org), &(bp->rec));
188
189 TCHECK(bp->xmt);
190 fputs(" xmt ", stdout);
191 p_ntp_delta(&(bp->org), &(bp->xmt));
192
193 return;
194
195trunc:
196 fputs(" [|ntp]", stdout);
197}
198
199static void
200p_sfix(register const struct s_fixedpt *sfp)
201{
202 register int i;
203 register int f;
204 register float ff;
205
206 i = EXTRACT_16BITS(&sfp->int_part);
207 f = EXTRACT_16BITS(&sfp->fraction);
208 ff = f / 65536.0; /* shift radix point by 16 bits */
209 f = ff * 1000000.0; /* Treat fraction as parts per million */
210 printf("%d.%06d", i, f);
211}
212
213#define FMAXINT (4294967296.0) /* floating point rep. of MAXINT */
214
215static void
216p_ntp_time(register const struct l_fixedpt *lfp)
217{
218 register int32_t i;
219 register u_int32_t uf;
220 register u_int32_t f;
221 register float ff;
222
223 i = EXTRACT_32BITS(&lfp->int_part);
224 uf = EXTRACT_32BITS(&lfp->fraction);
225 ff = uf;
226 if (ff < 0.0) /* some compilers are buggy */
227 ff += FMAXINT;
228 ff = ff / FMAXINT; /* shift radix point by 32 bits */
229 f = ff * 1000000000.0; /* treat fraction as parts per billion */
230 printf("%u.%09d", i, f);
231
232#ifdef HAVE_STRFTIME
233 /*
234 * For extra verbosity, print the time in human-readable format.
235 */
236 if (vflag > 1 && i) {
237 time_t seconds = i - JAN_1970;
238 struct tm *tm;
239 char time_buf[128];
240
241 tm = localtime(&seconds);
242 strftime(time_buf, sizeof (time_buf), "%Y/%m/%d %H:%M:%S", tm);
243 printf (" (%s)", time_buf);
244 }
245#endif
246}
247
248/* Prints time difference between *lfp and *olfp */
249static void
250p_ntp_delta(register const struct l_fixedpt *olfp,
251 register const struct l_fixedpt *lfp)
252{
253 register int32_t i;
254 register u_int32_t u, uf;
255 register u_int32_t ou, ouf;
256 register u_int32_t f;
257 register float ff;
258 int signbit;
259
260 u = EXTRACT_32BITS(&lfp->int_part);
261 ou = EXTRACT_32BITS(&olfp->int_part);
262 uf = EXTRACT_32BITS(&lfp->fraction);
263 ouf = EXTRACT_32BITS(&olfp->fraction);
264 if (ou == 0 && ouf == 0) {
265 p_ntp_time(lfp);
266 return;
267 }
268
269 i = u - ou;
270
271 if (i > 0) { /* new is definitely greater than old */
272 signbit = 0;
273 f = uf - ouf;
274 if (ouf > uf) /* must borrow from high-order bits */
275 i -= 1;
276 } else if (i < 0) { /* new is definitely less than old */
277 signbit = 1;
278 f = ouf - uf;
279 if (uf > ouf) /* must carry into the high-order bits */
280 i += 1;
281 i = -i;
282 } else { /* int_part is zero */
283 if (uf > ouf) {
284 signbit = 0;
285 f = uf - ouf;
286 } else {
287 signbit = 1;
288 f = ouf - uf;
289 }
290 }
291
292 ff = f;
293 if (ff < 0.0) /* some compilers are buggy */
294 ff += FMAXINT;
295 ff = ff / FMAXINT; /* shift radix point by 32 bits */
296 f = ff * 1000000000.0; /* treat fraction as parts per billion */
297 if (signbit)
298 putchar('-');
299 else
300 putchar('+');
301 printf("%d.%09d", i, f);
302}
303
2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Format and print ntp packets.
22 * By Jeffrey Mogul/DECWRL
23 * loosely based on print-bootp.c
24 *
25 * $FreeBSD: head/contrib/tcpdump/print-ntp.c 127675 2004-03-31 14:57:24Z bms $
26 */
27
28#ifndef lint
29static const char rcsid[] _U_ =
30 "@(#) $Header: /tcpdump/master/tcpdump/print-ntp.c,v 1.37.2.2 2003/11/16 08:51:36 guy Exp $ (LBL)";
31#endif
32
33#ifdef HAVE_CONFIG_H
34#include "config.h"
35#endif
36
37#include <tcpdump-stdinc.h>
38
39#include <stdio.h>
40#include <string.h>
41#ifdef HAVE_STRFTIME
42#include <time.h>
43#endif
44
45#include "interface.h"
46#include "addrtoname.h"
47#include "extract.h"
48#ifdef MODEMASK
49#undef MODEMASK /* Solaris sucks */
50#endif
51#include "ntp.h"
52
53static void p_sfix(const struct s_fixedpt *);
54static void p_ntp_time(const struct l_fixedpt *);
55static void p_ntp_delta(const struct l_fixedpt *, const struct l_fixedpt *);
56
57/*
58 * Print ntp requests
59 */
60void
61ntp_print(register const u_char *cp, u_int length)
62{
63 register const struct ntpdata *bp;
64 int mode, version, leapind;
65
66 bp = (struct ntpdata *)cp;
67 /* Note funny sized packets */
68 if (length != sizeof(struct ntpdata))
69 (void)printf(" [len=%d]", length);
70
71 TCHECK(bp->status);
72
73 version = (int)(bp->status & VERSIONMASK) >> 3;
74 printf("NTPv%d", version);
75
76 leapind = bp->status & LEAPMASK;
77 switch (leapind) {
78
79 case NO_WARNING:
80 break;
81
82 case PLUS_SEC:
83 fputs(" +1s", stdout);
84 break;
85
86 case MINUS_SEC:
87 fputs(" -1s", stdout);
88 break;
89 }
90
91 mode = bp->status & MODEMASK;
92 switch (mode) {
93
94 case MODE_UNSPEC: /* unspecified */
95 fputs(" unspec", stdout);
96 break;
97
98 case MODE_SYM_ACT: /* symmetric active */
99 fputs(" sym_act", stdout);
100 break;
101
102 case MODE_SYM_PAS: /* symmetric passive */
103 fputs(" sym_pas", stdout);
104 break;
105
106 case MODE_CLIENT: /* client */
107 fputs(" client", stdout);
108 break;
109
110 case MODE_SERVER: /* server */
111 fputs(" server", stdout);
112 break;
113
114 case MODE_BROADCAST: /* broadcast */
115 fputs(" bcast", stdout);
116 break;
117
118 case MODE_RES1: /* reserved */
119 fputs(" res1", stdout);
120 break;
121
122 case MODE_RES2: /* reserved */
123 fputs(" res2", stdout);
124 break;
125
126 }
127
128 TCHECK(bp->stratum);
129 printf(", strat %d", bp->stratum);
130
131 TCHECK(bp->ppoll);
132 printf(", poll %d", bp->ppoll);
133
134 /* Can't TCHECK bp->precision bitfield so bp->distance + 0 instead */
135 TCHECK2(bp->distance, 0);
136 printf(", prec %d", bp->precision);
137
138 if (!vflag)
139 return;
140
141 TCHECK(bp->distance);
142 fputs(" dist ", stdout);
143 p_sfix(&bp->distance);
144
145 TCHECK(bp->dispersion);
146 fputs(", disp ", stdout);
147 p_sfix(&bp->dispersion);
148
149 TCHECK(bp->refid);
150 fputs(", ref ", stdout);
151 /* Interpretation depends on stratum */
152 switch (bp->stratum) {
153
154 case UNSPECIFIED:
155 printf("(unspec)");
156 break;
157
158 case PRIM_REF:
159 fn_printn((u_char *)&(bp->refid), 4, NULL);
160 break;
161
162 case INFO_QUERY:
163 printf("%s INFO_QUERY", ipaddr_string(&(bp->refid)));
164 /* this doesn't have more content */
165 return;
166
167 case INFO_REPLY:
168 printf("%s INFO_REPLY", ipaddr_string(&(bp->refid)));
169 /* this is too complex to be worth printing */
170 return;
171
172 default:
173 printf("%s", ipaddr_string(&(bp->refid)));
174 break;
175 }
176
177 TCHECK(bp->reftime);
178 putchar('@');
179 p_ntp_time(&(bp->reftime));
180
181 TCHECK(bp->org);
182 fputs(" orig ", stdout);
183 p_ntp_time(&(bp->org));
184
185 TCHECK(bp->rec);
186 fputs(" rec ", stdout);
187 p_ntp_delta(&(bp->org), &(bp->rec));
188
189 TCHECK(bp->xmt);
190 fputs(" xmt ", stdout);
191 p_ntp_delta(&(bp->org), &(bp->xmt));
192
193 return;
194
195trunc:
196 fputs(" [|ntp]", stdout);
197}
198
199static void
200p_sfix(register const struct s_fixedpt *sfp)
201{
202 register int i;
203 register int f;
204 register float ff;
205
206 i = EXTRACT_16BITS(&sfp->int_part);
207 f = EXTRACT_16BITS(&sfp->fraction);
208 ff = f / 65536.0; /* shift radix point by 16 bits */
209 f = ff * 1000000.0; /* Treat fraction as parts per million */
210 printf("%d.%06d", i, f);
211}
212
213#define FMAXINT (4294967296.0) /* floating point rep. of MAXINT */
214
215static void
216p_ntp_time(register const struct l_fixedpt *lfp)
217{
218 register int32_t i;
219 register u_int32_t uf;
220 register u_int32_t f;
221 register float ff;
222
223 i = EXTRACT_32BITS(&lfp->int_part);
224 uf = EXTRACT_32BITS(&lfp->fraction);
225 ff = uf;
226 if (ff < 0.0) /* some compilers are buggy */
227 ff += FMAXINT;
228 ff = ff / FMAXINT; /* shift radix point by 32 bits */
229 f = ff * 1000000000.0; /* treat fraction as parts per billion */
230 printf("%u.%09d", i, f);
231
232#ifdef HAVE_STRFTIME
233 /*
234 * For extra verbosity, print the time in human-readable format.
235 */
236 if (vflag > 1 && i) {
237 time_t seconds = i - JAN_1970;
238 struct tm *tm;
239 char time_buf[128];
240
241 tm = localtime(&seconds);
242 strftime(time_buf, sizeof (time_buf), "%Y/%m/%d %H:%M:%S", tm);
243 printf (" (%s)", time_buf);
244 }
245#endif
246}
247
248/* Prints time difference between *lfp and *olfp */
249static void
250p_ntp_delta(register const struct l_fixedpt *olfp,
251 register const struct l_fixedpt *lfp)
252{
253 register int32_t i;
254 register u_int32_t u, uf;
255 register u_int32_t ou, ouf;
256 register u_int32_t f;
257 register float ff;
258 int signbit;
259
260 u = EXTRACT_32BITS(&lfp->int_part);
261 ou = EXTRACT_32BITS(&olfp->int_part);
262 uf = EXTRACT_32BITS(&lfp->fraction);
263 ouf = EXTRACT_32BITS(&olfp->fraction);
264 if (ou == 0 && ouf == 0) {
265 p_ntp_time(lfp);
266 return;
267 }
268
269 i = u - ou;
270
271 if (i > 0) { /* new is definitely greater than old */
272 signbit = 0;
273 f = uf - ouf;
274 if (ouf > uf) /* must borrow from high-order bits */
275 i -= 1;
276 } else if (i < 0) { /* new is definitely less than old */
277 signbit = 1;
278 f = ouf - uf;
279 if (uf > ouf) /* must carry into the high-order bits */
280 i += 1;
281 i = -i;
282 } else { /* int_part is zero */
283 if (uf > ouf) {
284 signbit = 0;
285 f = uf - ouf;
286 } else {
287 signbit = 1;
288 f = ouf - uf;
289 }
290 }
291
292 ff = f;
293 if (ff < 0.0) /* some compilers are buggy */
294 ff += FMAXINT;
295 ff = ff / FMAXINT; /* shift radix point by 32 bits */
296 f = ff * 1000000000.0; /* treat fraction as parts per billion */
297 if (signbit)
298 putchar('-');
299 else
300 putchar('+');
301 printf("%d.%09d", i, f);
302}
303