summaryrefslogtreecommitdiffstats
path: root/sbin/ping6/ping6.c
blob: 3806daa0f0decc31b62cddd72a47c757a0f377fc (plain)
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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
/*	$KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project 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 BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*	BSDI	ping.c,v 2.3 1996/01/21 17:56:50 jch Exp	*/

/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Mike Muuss.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)ping.c	8.1 (Berkeley) 6/5/93";
#endif
#endif /* not lint */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
 * measure round-trip-delays and packet loss across network paths.
 *
 * Author -
 *	Mike Muuss
 *	U. S. Army Ballistic Research Laboratory
 *	December, 1983
 *
 * Status -
 *	Public Domain.  Distribution Unlimited.
 * Bugs -
 *	More statistics could always be gathered.
 *	This program has to run SUID to ROOT to access the ICMP socket.
 */
/*
 * NOTE:
 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
 * as IPV6_PKTINFO.  Some people object it (sin6_scope_id specifies *link*
 * while IPV6_PKTINFO specifies *interface*.  Link is defined as collection of
 * network attached to 1 or more interfaces)
 */

#include <sys/param.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/time.h>

#include <net/if.h>
#include <net/route.h>

#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

#ifdef IPSEC
#include <netipsec/ah.h>
#include <netipsec/ipsec.h>
#endif

#include <md5.h>

struct tv32 {
	u_int32_t tv32_sec;
	u_int32_t tv32_usec;
};

#define MAXPACKETLEN	131072
#define	IP6LEN		40
#define ICMP6ECHOLEN	8	/* icmp echo header len excluding time */
#define ICMP6ECHOTMLEN sizeof(struct tv32)
#define ICMP6_NIQLEN	(ICMP6ECHOLEN + 8)
# define CONTROLLEN	10240	/* ancillary data buffer size RFC3542 20.1 */
/* FQDN case, 64 bits of nonce + 32 bits ttl */
#define ICMP6_NIRLEN	(ICMP6ECHOLEN + 12)
#define	EXTRA		256	/* for AH and various other headers. weird. */
#define	DEFDATALEN	ICMP6ECHOTMLEN
#define MAXDATALEN	MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
#define	NROUTES		9		/* number of record route slots */
#define	MAXWAIT		10000		/* max ms to wait for response */
#define	MAXALARM	(60 * 60)	/* max seconds for alarm timeout */

#define	A(bit)		rcvd_tbl[(bit)>>3]	/* identify byte in array */
#define	B(bit)		(1 << ((bit) & 0x07))	/* identify bit in byte */
#define	SET(bit)	(A(bit) |= B(bit))
#define	CLR(bit)	(A(bit) &= (~B(bit)))
#define	TST(bit)	(A(bit) & B(bit))

#define	F_FLOOD		0x0001
#define	F_INTERVAL	0x0002
#define	F_PINGFILLED	0x0008
#define	F_QUIET		0x0010
#define	F_RROUTE	0x0020
#define	F_SO_DEBUG	0x0040
#define	F_VERBOSE	0x0100
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
#define	F_POLICY	0x0400
#else
#define F_AUTHHDR	0x0200
#define F_ENCRYPT	0x0400
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
#define F_NODEADDR	0x0800
#define F_FQDN		0x1000
#define F_INTERFACE	0x2000
#define F_SRCADDR	0x4000
#define F_HOSTNAME	0x10000
#define F_FQDNOLD	0x20000
#define F_NIGROUP	0x40000
#define F_SUPTYPES	0x80000
#define F_NOMINMTU	0x100000
#define F_ONCE		0x200000
#define F_AUDIBLE	0x400000
#define F_MISSED	0x800000
#define F_DONTFRAG	0x1000000
#define F_NOUSERDATA	(F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
#define	F_WAITTIME	0x2000000
u_int options;

#define IN6LEN		sizeof(struct in6_addr)
#define SA6LEN		sizeof(struct sockaddr_in6)
#define DUMMY_PORT	10101

#define SIN6(s)	((struct sockaddr_in6 *)(s))

/*
 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 * number of received sequence numbers we can keep track of.  Change 128
 * to 8192 for complete accuracy...
 */
#define	MAX_DUP_CHK	(8 * 8192)
int mx_dup_ck = MAX_DUP_CHK;
char rcvd_tbl[MAX_DUP_CHK / 8];

struct sockaddr_in6 dst;	/* who to ping6 */
struct sockaddr_in6 src;	/* src addr of this packet */
socklen_t srclen;
int datalen = DEFDATALEN;
int s;				/* socket file descriptor */
u_char outpack[MAXPACKETLEN];
char BSPACE = '\b';		/* characters written for flood */
char BBELL = '\a';		/* characters written for AUDIBLE */
char DOT = '.';
char *hostname;
int ident;			/* process id to identify our packets */
u_int8_t nonce[8];		/* nonce field for node information */
int hoplimit = -1;		/* hoplimit */
int pathmtu = 0;		/* path MTU for the destination.  0 = unspec. */
u_char *packet = NULL;

/* counters */
long nmissedmax;		/* max value of ntransmitted - nreceived - 1 */
long npackets;			/* max packets to transmit */
long nreceived;			/* # of packets we got back */
long nrepeats;			/* number of duplicates */
long ntransmitted;		/* sequence # for outbound packets = #sent */
int interval = 1000;		/* interval between packets in ms */
int waittime = MAXWAIT;		/* timeout for each packet */
long nrcvtimeout = 0;		/* # of packets we got back after waittime */

/* timing */
int timing;			/* flag to do timing */
double tmin = 999999999.0;	/* minimum round trip time */
double tmax = 0.0;		/* maximum round trip time */
double tsum = 0.0;		/* sum of all times, for doing average */
double tsumsq = 0.0;		/* sum of all times squared, for std. dev. */

/* for node addresses */
u_short naflags;

/* for ancillary data(advanced API) */
struct msghdr smsghdr;
struct iovec smsgiov;
char *scmsg = 0;

volatile sig_atomic_t seenint;
#ifdef SIGINFO
volatile sig_atomic_t seeninfo;
#endif

int	 main(int, char *[]);
void	 fill(char *, char *);
int	 get_hoplim(struct msghdr *);
int	 get_pathmtu(struct msghdr *);
struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
void	 onsignal(int);
void	 onint(int);
size_t	 pingerlen(void);
int	 pinger(void);
const char *pr_addr(struct sockaddr *, int);
void	 pr_icmph(struct icmp6_hdr *, u_char *);
void	 pr_iph(struct ip6_hdr *);
void	 pr_suptypes(struct icmp6_nodeinfo *, size_t);
void	 pr_nodeaddr(struct icmp6_nodeinfo *, int);
int	 myechoreply(const struct icmp6_hdr *);
int	 mynireply(const struct icmp6_nodeinfo *);
char *dnsdecode(const u_char **, const u_char *, const u_char *,
	char *, size_t);
void	 pr_pack(u_char *, int, struct msghdr *);
void	 pr_exthdrs(struct msghdr *);
void	 pr_ip6opt(void *, size_t);
void	 pr_rthdr(void *, size_t);
int	 pr_bitrange(u_int32_t, int, int);
void	 pr_retip(struct ip6_hdr *, u_char *);
void	 summary(void);
void	 tvsub(struct timeval *, struct timeval *);
int	 setpolicy(int, char *);
char	*nigroup(char *, int);
void	 usage(void);

int
main(int argc, char *argv[])
{
	struct timeval last, intvl;
	struct sockaddr_in6 from, *sin6;
	struct addrinfo hints, *res;
	struct sigaction si_sa;
	int cc, i;
	int almost_done, ch, hold, packlen, preload, optval, error;
	int nig_oldmcprefix = -1;
	u_char *datap;
	char *e, *target, *ifname = NULL, *gateway = NULL;
	int ip6optlen = 0;
	struct cmsghdr *scmsgp = NULL;
	/* For control (ancillary) data received from recvmsg() */
	struct cmsghdr cm[CONTROLLEN];
#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
	u_long lsockbufsize;
	int sockbufsize = 0;
#endif
	int usepktinfo = 0;
	struct in6_pktinfo *pktinfo = NULL;
#ifdef USE_RFC2292BIS
	struct ip6_rthdr *rthdr = NULL;
#endif
#ifdef IPSEC_POLICY_IPSEC
	char *policy_in = NULL;
	char *policy_out = NULL;
#endif
	double t;
	u_long alarmtimeout;
	size_t rthlen;
#ifdef IPV6_USE_MIN_MTU
	int mflag = 0;
#endif

	/* just to be sure */
	memset(&smsghdr, 0, sizeof(smsghdr));
	memset(&smsgiov, 0, sizeof(smsgiov));

	alarmtimeout = preload = 0;
	datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
#ifndef IPSEC
#define ADDOPTS
#else
#ifdef IPSEC_POLICY_IPSEC
#define ADDOPTS	"P:"
#else
#define ADDOPTS	"AE"
#endif /*IPSEC_POLICY_IPSEC*/
#endif
	while ((ch = getopt(argc, argv,
	    "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
#undef ADDOPTS
		switch (ch) {
		case 'a':
		{
			char *cp;

			options &= ~F_NOUSERDATA;
			options |= F_NODEADDR;
			for (cp = optarg; *cp != '\0'; cp++) {
				switch (*cp) {
				case 'a':
					naflags |= NI_NODEADDR_FLAG_ALL;
					break;
				case 'c':
				case 'C':
					naflags |= NI_NODEADDR_FLAG_COMPAT;
					break;
				case 'l':
				case 'L':
					naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
					break;
				case 's':
				case 'S':
					naflags |= NI_NODEADDR_FLAG_SITELOCAL;
					break;
				case 'g':
				case 'G':
					naflags |= NI_NODEADDR_FLAG_GLOBAL;
					break;
				case 'A': /* experimental. not in the spec */
#ifdef NI_NODEADDR_FLAG_ANYCAST
					naflags |= NI_NODEADDR_FLAG_ANYCAST;
					break;
#else
					errx(1,
"-a A is not supported on the platform");
					/*NOTREACHED*/
#endif
				default:
					usage();
					/*NOTREACHED*/
				}
			}
			break;
		}
		case 'b':
#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
			errno = 0;
			e = NULL;
			lsockbufsize = strtoul(optarg, &e, 10);
			sockbufsize = lsockbufsize;
			if (errno || !*optarg || *e ||
			    sockbufsize != lsockbufsize)
				errx(1, "invalid socket buffer size");
#else
			errx(1,
"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
#endif
			break;
		case 'c':
			npackets = strtol(optarg, &e, 10);
			if (npackets <= 0 || *optarg == '\0' || *e != '\0')
				errx(1,
				    "illegal number of packets -- %s", optarg);
			break;
		case 'D':
			options |= F_DONTFRAG;
			break;
		case 'd':
			options |= F_SO_DEBUG;
			break;
		case 'f':
			if (getuid()) {
				errno = EPERM;
				errx(1, "Must be superuser to flood ping");
			}
			options |= F_FLOOD;
			setbuf(stdout, (char *)NULL);
			break;
		case 'g':
			gateway = optarg;
			break;
		case 'H':
			options |= F_HOSTNAME;
			break;
		case 'h':		/* hoplimit */
			hoplimit = strtol(optarg, &e, 10);
			if (*optarg == '\0' || *e != '\0')
				errx(1, "illegal hoplimit %s", optarg);
			if (255 < hoplimit || hoplimit < -1)
				errx(1,
				    "illegal hoplimit -- %s", optarg);
			break;
		case 'I':
			ifname = optarg;
			options |= F_INTERFACE;
#ifndef USE_SIN6_SCOPE_ID
			usepktinfo++;
#endif
			break;
		case 'i':		/* wait between sending packets */
			t = strtod(optarg, &e);
			if (*optarg == '\0' || *e != '\0')
				errx(1, "illegal timing interval %s", optarg);
			if (t < 1 && getuid()) {
				errx(1, "%s: only root may use interval < 1s",
				    strerror(EPERM));
			}
			intvl.tv_sec = (long)t;
			intvl.tv_usec =
			    (long)((t - intvl.tv_sec) * 1000000);
			if (intvl.tv_sec < 0)
				errx(1, "illegal timing interval %s", optarg);
			/* less than 1/hz does not make sense */
			if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
				warnx("too small interval, raised to .000001");
				intvl.tv_usec = 1;
			}
			options |= F_INTERVAL;
			break;
		case 'l':
			if (getuid()) {
				errno = EPERM;
				errx(1, "Must be superuser to preload");
			}
			preload = strtol(optarg, &e, 10);
			if (preload < 0 || *optarg == '\0' || *e != '\0')
				errx(1, "illegal preload value -- %s", optarg);
			break;
		case 'm':
#ifdef IPV6_USE_MIN_MTU
			mflag++;
			break;
#else
			errx(1, "-%c is not supported on this platform", ch);
			/*NOTREACHED*/
#endif
		case 'n':
			options &= ~F_HOSTNAME;
			break;
		case 'N':
			options |= F_NIGROUP;
			nig_oldmcprefix++;
			break;
		case 'o':
			options |= F_ONCE;
			break;
		case 'p':		/* fill buffer with user pattern */
			options |= F_PINGFILLED;
			fill((char *)datap, optarg);
				break;
		case 'q':
			options |= F_QUIET;
			break;
		case 'r':
			options |= F_AUDIBLE;
			break;
		case 'R':
			options |= F_MISSED;
			break;
		case 'S':
			memset(&hints, 0, sizeof(struct addrinfo));
			hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
			hints.ai_family = AF_INET6;
			hints.ai_socktype = SOCK_RAW;
			hints.ai_protocol = IPPROTO_ICMPV6;

			error = getaddrinfo(optarg, NULL, &hints, &res);
			if (error) {
				errx(1, "invalid source address: %s",
				     gai_strerror(error));
			}
			/*
			 * res->ai_family must be AF_INET6 and res->ai_addrlen
			 * must be sizeof(src).
			 */
			memcpy(&src, res->ai_addr, res->ai_addrlen);
			srclen = res->ai_addrlen;
			freeaddrinfo(res);
			res = NULL;
			options |= F_SRCADDR;
			break;
		case 's':		/* size of packet to send */
			datalen = strtol(optarg, &e, 10);
			if (datalen <= 0 || *optarg == '\0' || *e != '\0')
				errx(1, "illegal datalen value -- %s", optarg);
			if (datalen > MAXDATALEN) {
				errx(1,
				    "datalen value too large, maximum is %d",
				    MAXDATALEN);
			}
			break;
		case 't':
			options &= ~F_NOUSERDATA;
			options |= F_SUPTYPES;
			break;
		case 'v':
			options |= F_VERBOSE;
			break;
		case 'w':
			options &= ~F_NOUSERDATA;
			options |= F_FQDN;
			break;
		case 'W':
			options &= ~F_NOUSERDATA;
			options |= F_FQDNOLD;
			break;
		case 'x':
			t = strtod(optarg, &e);
			if (*e || e == optarg || t > (double)INT_MAX)
				err(EX_USAGE, "invalid timing interval: `%s'",
				    optarg);
			options |= F_WAITTIME;
			waittime = (int)t;
			break;
		case 'X':
			alarmtimeout = strtoul(optarg, &e, 0);
			if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
				errx(EX_USAGE, "invalid timeout: `%s'",
				    optarg);
			if (alarmtimeout > MAXALARM)
				errx(EX_USAGE, "invalid timeout: `%s' > %d",
				    optarg, MAXALARM);
			alarm((int)alarmtimeout);
			break;
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
		case 'P':
			options |= F_POLICY;
			if (!strncmp("in", optarg, 2)) {
				if ((policy_in = strdup(optarg)) == NULL)
					errx(1, "strdup");
			} else if (!strncmp("out", optarg, 3)) {
				if ((policy_out = strdup(optarg)) == NULL)
					errx(1, "strdup");
			} else
				errx(1, "invalid security policy");
			break;
#else
		case 'A':
			options |= F_AUTHHDR;
			break;
		case 'E':
			options |= F_ENCRYPT;
			break;
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
		default:
			usage();
			/*NOTREACHED*/
		}
	}

	argc -= optind;
	argv += optind;

	if (argc < 1) {
		usage();
		/*NOTREACHED*/
	}

	if (argc > 1) {
#ifdef IPV6_RECVRTHDR	/* 2292bis */
		rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
		    argc - 1));
#else  /* RFC2292 */
		rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
#endif
		if (rthlen == 0) {
			errx(1, "too many intermediate hops");
			/*NOTREACHED*/
		}
		ip6optlen += rthlen;
	}

	if (options & F_NIGROUP) {
		target = nigroup(argv[argc - 1], nig_oldmcprefix);
		if (target == NULL) {
			usage();
			/*NOTREACHED*/
		}
	} else
		target = argv[argc - 1];

	/* getaddrinfo */
	memset(&hints, 0, sizeof(struct addrinfo));
	hints.ai_flags = AI_CANONNAME;
	hints.ai_family = AF_INET6;
	hints.ai_socktype = SOCK_RAW;
	hints.ai_protocol = IPPROTO_ICMPV6;

	error = getaddrinfo(target, NULL, &hints, &res);
	if (error)
		errx(1, "%s", gai_strerror(error));
	if (res->ai_canonname)
		hostname = res->ai_canonname;
	else
		hostname = target;

	if (!res->ai_addr)
		errx(1, "getaddrinfo failed");

	(void)memcpy(&dst, res->ai_addr, res->ai_addrlen);

	if ((s = socket(res->ai_family, res->ai_socktype,
	    res->ai_protocol)) < 0)
		err(1, "socket");

	/* set the source address if specified. */
	if ((options & F_SRCADDR) &&
	    bind(s, (struct sockaddr *)&src, srclen) != 0) {
		err(1, "bind");
	}

	/* set the gateway (next hop) if specified */
	if (gateway) {
		memset(&hints, 0, sizeof(hints));
		hints.ai_family = AF_INET6;
		hints.ai_socktype = SOCK_RAW;
		hints.ai_protocol = IPPROTO_ICMPV6;

		error = getaddrinfo(gateway, NULL, &hints, &res);
		if (error) {
			errx(1, "getaddrinfo for the gateway %s: %s",
			     gateway, gai_strerror(error));
		}
		if (res->ai_next && (options & F_VERBOSE))
			warnx("gateway resolves to multiple addresses");

		if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
		    res->ai_addr, res->ai_addrlen)) {
			err(1, "setsockopt(IPV6_NEXTHOP)");
		}

		freeaddrinfo(res);
	}

	/*
	 * let the kerel pass extension headers of incoming packets,
	 * for privileged socket options
	 */
	if ((options & F_VERBOSE) != 0) {
		int opton = 1;

#ifdef IPV6_RECVHOPOPTS
		if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_RECVHOPOPTS)");
#else  /* old adv. API */
		if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_HOPOPTS)");
#endif
#ifdef IPV6_RECVDSTOPTS
		if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_RECVDSTOPTS)");
#else  /* old adv. API */
		if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_DSTOPTS)");
#endif
#ifdef IPV6_RECVRTHDRDSTOPTS
		if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
#endif
	}

	/* revoke root privilege */
	if (seteuid(getuid()) != 0)
		err(1, "seteuid() failed");
	if (setuid(getuid()) != 0)
		err(1, "setuid() failed");

	if ((options & F_FLOOD) && (options & F_INTERVAL))
		errx(1, "-f and -i incompatible options");

	if ((options & F_NOUSERDATA) == 0) {
		if (datalen >= sizeof(struct tv32)) {
			/* we can time transfer */
			timing = 1;
		} else
			timing = 0;
		/* in F_VERBOSE case, we may get non-echoreply packets*/
		if (options & F_VERBOSE)
			packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
		else
			packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
	} else {
		/* suppress timing for node information query */
		timing = 0;
		datalen = 2048;
		packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
	}

	if (!(packet = (u_char *)malloc((u_int)packlen)))
		err(1, "Unable to allocate packet");
	if (!(options & F_PINGFILLED))
		for (i = ICMP6ECHOLEN; i < packlen; ++i)
			*datap++ = i;

	ident = getpid() & 0xFFFF;
	arc4random_buf(nonce, sizeof(nonce));
	optval = 1;
	if (options & F_DONTFRAG)
		if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
		    &optval, sizeof(optval)) == -1)
			err(1, "IPV6_DONTFRAG");
	hold = 1;

	if (options & F_SO_DEBUG)
		(void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
		    sizeof(hold));
	optval = IPV6_DEFHLIM;
	if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
		if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
		    &optval, sizeof(optval)) == -1)
			err(1, "IPV6_MULTICAST_HOPS");
#ifdef IPV6_USE_MIN_MTU
	if (mflag != 1) {
		optval = mflag > 1 ? 0 : 1;

		if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
		    &optval, sizeof(optval)) == -1)
			err(1, "setsockopt(IPV6_USE_MIN_MTU)");
	}
#ifdef IPV6_RECVPATHMTU
	else {
		optval = 1;
		if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
		    &optval, sizeof(optval)) == -1)
			err(1, "setsockopt(IPV6_RECVPATHMTU)");
	}
#endif /* IPV6_RECVPATHMTU */
#endif /* IPV6_USE_MIN_MTU */

#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
	if (options & F_POLICY) {
		if (setpolicy(s, policy_in) < 0)
			errx(1, "%s", ipsec_strerror());
		if (setpolicy(s, policy_out) < 0)
			errx(1, "%s", ipsec_strerror());
	}
#else
	if (options & F_AUTHHDR) {
		optval = IPSEC_LEVEL_REQUIRE;
#ifdef IPV6_AUTH_TRANS_LEVEL
		if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
		    &optval, sizeof(optval)) == -1)
			err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
#else /* old def */
		if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
		    &optval, sizeof(optval)) == -1)
			err(1, "setsockopt(IPV6_AUTH_LEVEL)");
#endif
	}
	if (options & F_ENCRYPT) {
		optval = IPSEC_LEVEL_REQUIRE;
		if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
		    &optval, sizeof(optval)) == -1)
			err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
	}
#endif /*IPSEC_POLICY_IPSEC*/
#endif

#ifdef ICMP6_FILTER
    {
	struct icmp6_filter filt;
	if (!(options & F_VERBOSE)) {
		ICMP6_FILTER_SETBLOCKALL(&filt);
		if ((options & F_FQDN) || (options & F_FQDNOLD) ||
		    (options & F_NODEADDR) || (options & F_SUPTYPES))
			ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
		else
			ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
	} else {
		ICMP6_FILTER_SETPASSALL(&filt);
	}
	if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
	    sizeof(filt)) < 0)
		err(1, "setsockopt(ICMP6_FILTER)");
    }
#endif /*ICMP6_FILTER*/

	/* let the kerel pass extension headers of incoming packets */
	if ((options & F_VERBOSE) != 0) {
		int opton = 1;

#ifdef IPV6_RECVRTHDR
		if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_RECVRTHDR)");
#else  /* old adv. API */
		if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
		    sizeof(opton)))
			err(1, "setsockopt(IPV6_RTHDR)");
#endif
	}

/*
	optval = 1;
	if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
		if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
		    &optval, sizeof(optval)) == -1)
			err(1, "IPV6_MULTICAST_LOOP");
*/

	/* Specify the outgoing interface and/or the source address */
	if (usepktinfo)
		ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));

	if (hoplimit != -1)
		ip6optlen += CMSG_SPACE(sizeof(int));

	/* set IP6 packet options */
	if (ip6optlen) {
		if ((scmsg = (char *)malloc(ip6optlen)) == 0)
			errx(1, "can't allocate enough memory");
		smsghdr.msg_control = (caddr_t)scmsg;
		smsghdr.msg_controllen = ip6optlen;
		scmsgp = (struct cmsghdr *)scmsg;
	}
	if (usepktinfo) {
		pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
		memset(pktinfo, 0, sizeof(*pktinfo));
		scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
		scmsgp->cmsg_level = IPPROTO_IPV6;
		scmsgp->cmsg_type = IPV6_PKTINFO;
		scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
	}

	/* set the outgoing interface */
	if (ifname) {
#ifndef USE_SIN6_SCOPE_ID
		/* pktinfo must have already been allocated */
		if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
			errx(1, "%s: invalid interface name", ifname);
#else
		if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
			errx(1, "%s: invalid interface name", ifname);
#endif
	}
	if (hoplimit != -1) {
		scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
		scmsgp->cmsg_level = IPPROTO_IPV6;
		scmsgp->cmsg_type = IPV6_HOPLIMIT;
		*(int *)(CMSG_DATA(scmsgp)) = hoplimit;

		scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
	}

	if (argc > 1) {	/* some intermediate addrs are specified */
		int hops;
#ifdef USE_RFC2292BIS
		int rthdrlen;
#endif

#ifdef USE_RFC2292BIS
		rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
		scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
		scmsgp->cmsg_level = IPPROTO_IPV6;
		scmsgp->cmsg_type = IPV6_RTHDR;
		rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
		rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
		    IPV6_RTHDR_TYPE_0, argc - 1);
		if (rthdr == NULL)
			errx(1, "can't initialize rthdr");
#else  /* old advanced API */
		if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
		    IPV6_RTHDR_TYPE_0)) == 0)
			errx(1, "can't initialize rthdr");
#endif /* USE_RFC2292BIS */

		for (hops = 0; hops < argc - 1; hops++) {
			memset(&hints, 0, sizeof(hints));
			hints.ai_family = AF_INET6;

			if ((error = getaddrinfo(argv[hops], NULL, &hints,
			    &res)))
				errx(1, "%s", gai_strerror(error));
			if (res->ai_addr->sa_family != AF_INET6)
				errx(1,
				    "bad addr family of an intermediate addr");
			sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
#ifdef USE_RFC2292BIS
			if (inet6_rth_add(rthdr, &sin6->sin6_addr))
				errx(1, "can't add an intermediate node");
#else  /* old advanced API */
			if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
			    IPV6_RTHDR_LOOSE))
				errx(1, "can't add an intermediate node");
#endif /* USE_RFC2292BIS */
			freeaddrinfo(res);
		}

#ifndef USE_RFC2292BIS
		if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
			errx(1, "can't set the last flag");
#endif

		scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
	}

	if (!(options & F_SRCADDR)) {
		/*
		 * get the source address. XXX since we revoked the root
		 * privilege, we cannot use a raw socket for this.
		 */
		int dummy;
		socklen_t len = sizeof(src);

		if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
			err(1, "UDP socket");

		src.sin6_family = AF_INET6;
		src.sin6_addr = dst.sin6_addr;
		src.sin6_port = ntohs(DUMMY_PORT);
		src.sin6_scope_id = dst.sin6_scope_id;

#ifdef USE_RFC2292BIS
		if (pktinfo &&
		    setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
		    (void *)pktinfo, sizeof(*pktinfo)))
			err(1, "UDP setsockopt(IPV6_PKTINFO)");

		if (hoplimit != -1 &&
		    setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
		    (void *)&hoplimit, sizeof(hoplimit)))
			err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");

		if (hoplimit != -1 &&
		    setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
		    (void *)&hoplimit, sizeof(hoplimit)))
			err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");

		if (rthdr &&
		    setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
		    (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
			err(1, "UDP setsockopt(IPV6_RTHDR)");
#else  /* old advanced API */
		if (smsghdr.msg_control &&
		    setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
		    (void *)smsghdr.msg_control, smsghdr.msg_controllen))
			err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
#endif

		if (connect(dummy, (struct sockaddr *)&src, len) < 0)
			err(1, "UDP connect");

		if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
			err(1, "getsockname");

		close(dummy);
	}

#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
	if (sockbufsize) {
		if (datalen > sockbufsize)
			warnx("you need -b to increase socket buffer size");
		if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
		    sizeof(sockbufsize)) < 0)
			err(1, "setsockopt(SO_SNDBUF)");
		if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
		    sizeof(sockbufsize)) < 0)
			err(1, "setsockopt(SO_RCVBUF)");
	}
	else {
		if (datalen > 8 * 1024)	/*XXX*/
			warnx("you need -b to increase socket buffer size");
		/*
		 * When pinging the broadcast address, you can get a lot of
		 * answers. Doing something so evil is useful if you are trying
		 * to stress the ethernet, or just want to fill the arp cache
		 * to get some stuff for /etc/ethers.
		 */
		hold = 48 * 1024;
		setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
		    sizeof(hold));
	}
#endif

	optval = 1;
#ifndef USE_SIN6_SCOPE_ID
#ifdef IPV6_RECVPKTINFO
	if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
	    sizeof(optval)) < 0)
		warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
#else  /* old adv. API */
	if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
	    sizeof(optval)) < 0)
		warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
#endif
#endif /* USE_SIN6_SCOPE_ID */
#ifdef IPV6_RECVHOPLIMIT
	if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
	    sizeof(optval)) < 0)
		warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
#else  /* old adv. API */
	if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
	    sizeof(optval)) < 0)
		warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
#endif

	printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
	    (unsigned long)(pingerlen() - 8));
	printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
	printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));

	if (preload == 0)
		pinger();
	else {
		if (npackets != 0 && preload > npackets)
			preload = npackets;
		while (preload--)
			pinger();
	}
	gettimeofday(&last, NULL);

	sigemptyset(&si_sa.sa_mask);
	si_sa.sa_flags = 0;
	si_sa.sa_handler = onsignal;
	if (sigaction(SIGINT, &si_sa, 0) == -1)
		err(EX_OSERR, "sigaction SIGINT");
	seenint = 0;
#ifdef SIGINFO
	if (sigaction(SIGINFO, &si_sa, 0) == -1)
		err(EX_OSERR, "sigaction SIGINFO");
	seeninfo = 0;
#endif
	if (alarmtimeout > 0) {
		if (sigaction(SIGALRM, &si_sa, 0) == -1)
			err(EX_OSERR, "sigaction SIGALRM");
	}
	if (options & F_FLOOD) {
		intvl.tv_sec = 0;
		intvl.tv_usec = 10000;
	} else if ((options & F_INTERVAL) == 0) {
		intvl.tv_sec = interval / 1000;
		intvl.tv_usec = interval % 1000 * 1000;
	}

	almost_done = 0;
	while (seenint == 0) {
		struct timeval now, timeout;
		struct msghdr m;
		struct iovec iov[2];
		fd_set rfds;
		int n;

		/* signal handling */
		if (seenint)
			onint(SIGINT);
#ifdef SIGINFO
		if (seeninfo) {
			summary();
			seeninfo = 0;
			continue;
		}
#endif
		FD_ZERO(&rfds);
		FD_SET(s, &rfds);
		gettimeofday(&now, NULL);
		timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
		timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
		while (timeout.tv_usec < 0) {
			timeout.tv_usec += 1000000;
			timeout.tv_sec--;
		}
		while (timeout.tv_usec > 1000000) {
			timeout.tv_usec -= 1000000;
			timeout.tv_sec++;
		}
		if (timeout.tv_sec < 0)
			timeout.tv_sec = timeout.tv_usec = 0;

		n = select(s + 1, &rfds, NULL, NULL, &timeout);
		if (n < 0)
			continue;	/* EINTR */
		if (n == 1) {
			m.msg_name = (caddr_t)&from;
			m.msg_namelen = sizeof(from);
			memset(&iov, 0, sizeof(iov));
			iov[0].iov_base = (caddr_t)packet;
			iov[0].iov_len = packlen;
			m.msg_iov = iov;
			m.msg_iovlen = 1;
			memset(cm, 0, CONTROLLEN);
			m.msg_control = (void *)cm;
			m.msg_controllen = CONTROLLEN;

			cc = recvmsg(s, &m, 0);
			if (cc < 0) {
				if (errno != EINTR) {
					warn("recvmsg");
					sleep(1);
				}
				continue;
			} else if (cc == 0) {
				int mtu;

				/*
				 * receive control messages only. Process the
				 * exceptions (currently the only possibility is
				 * a path MTU notification.)
				 */
				if ((mtu = get_pathmtu(&m)) > 0) {
					if ((options & F_VERBOSE) != 0) {
						printf("new path MTU (%d) is "
						    "notified\n", mtu);
					}
				}
				continue;
			} else {
				/*
				 * an ICMPv6 message (probably an echoreply)
				 * arrived.
				 */
				pr_pack(packet, cc, &m);
			}
			if (((options & F_ONCE) != 0 && nreceived > 0) ||
			    (npackets > 0 && nreceived >= npackets))
				break;
		}
		if (n == 0 || (options & F_FLOOD)) {
			if (npackets == 0 || ntransmitted < npackets)
				pinger();
			else {
				if (almost_done)
					break;
				almost_done = 1;
			/*
			 * If we're not transmitting any more packets,
			 * change the timer to wait two round-trip times
			 * if we've received any packets or (waittime)
			 * milliseconds if we haven't.
			 */
				intvl.tv_usec = 0;
				if (nreceived) {
					intvl.tv_sec = 2 * tmax / 1000;
					if (intvl.tv_sec == 0)
						intvl.tv_sec = 1;
				} else {
					intvl.tv_sec = waittime / 1000;
					intvl.tv_usec = waittime % 1000 * 1000;
				}
			}
			gettimeofday(&last, NULL);
			if (ntransmitted - nreceived - 1 > nmissedmax) {
				nmissedmax = ntransmitted - nreceived - 1;
				if (options & F_MISSED)
					(void)write(STDOUT_FILENO, &BBELL, 1);
			}
		}
	}
	sigemptyset(&si_sa.sa_mask);
	si_sa.sa_flags = 0;
	si_sa.sa_handler = SIG_IGN;
	sigaction(SIGINT, &si_sa, 0);
	sigaction(SIGALRM, &si_sa, 0);
	summary();

	if (res != NULL)
		freeaddrinfo(res);

        if(packet != NULL)
                free(packet);

	exit(nreceived == 0 ? 2 : 0);
}

void
onsignal(int sig)
{

	switch (sig) {
	case SIGINT:
	case SIGALRM:
		seenint++;
		break;
#ifdef SIGINFO
	case SIGINFO:
		seeninfo++;
		break;
#endif
	}
}

/*
 * pinger --
 *	Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
 * will be added on by the kernel.  The ID field is our UNIX process ID,
 * and the sequence number is an ascending integer.  The first 8 bytes
 * of the data portion are used to hold a UNIX "timeval" struct in VAX
 * byte-order, to compute the round-trip time.
 */
size_t
pingerlen(void)
{
	size_t l;

	if (options & F_FQDN)
		l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
	else if (options & F_FQDNOLD)
		l = ICMP6_NIQLEN;
	else if (options & F_NODEADDR)
		l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
	else if (options & F_SUPTYPES)
		l = ICMP6_NIQLEN;
	else
		l = ICMP6ECHOLEN + datalen;

	return l;
}

int
pinger(void)
{
	struct icmp6_hdr *icp;
	struct iovec iov[2];
	int i, cc;
	struct icmp6_nodeinfo *nip;
	int seq;

	if (npackets && ntransmitted >= npackets)
		return(-1);	/* no more transmission */

	icp = (struct icmp6_hdr *)outpack;
	nip = (struct icmp6_nodeinfo *)outpack;
	memset(icp, 0, sizeof(*icp));
	icp->icmp6_cksum = 0;
	seq = ntransmitted++;
	CLR(seq % mx_dup_ck);

	if (options & F_FQDN) {
		icp->icmp6_type = ICMP6_NI_QUERY;
		icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
		nip->ni_qtype = htons(NI_QTYPE_FQDN);
		nip->ni_flags = htons(0);

		memcpy(nip->icmp6_ni_nonce, nonce,
		    sizeof(nip->icmp6_ni_nonce));
		*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);

		memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
		    sizeof(dst.sin6_addr));
		cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
		datalen = 0;
	} else if (options & F_FQDNOLD) {
		/* packet format in 03 draft - no Subject data on queries */
		icp->icmp6_type = ICMP6_NI_QUERY;
		icp->icmp6_code = 0;	/* code field is always 0 */
		nip->ni_qtype = htons(NI_QTYPE_FQDN);
		nip->ni_flags = htons(0);

		memcpy(nip->icmp6_ni_nonce, nonce,
		    sizeof(nip->icmp6_ni_nonce));
		*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);

		cc = ICMP6_NIQLEN;
		datalen = 0;
	} else if (options & F_NODEADDR) {
		icp->icmp6_type = ICMP6_NI_QUERY;
		icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
		nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
		nip->ni_flags = naflags;

		memcpy(nip->icmp6_ni_nonce, nonce,
		    sizeof(nip->icmp6_ni_nonce));
		*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);

		memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
		    sizeof(dst.sin6_addr));
		cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
		datalen = 0;
	} else if (options & F_SUPTYPES) {
		icp->icmp6_type = ICMP6_NI_QUERY;
		icp->icmp6_code = ICMP6_NI_SUBJ_FQDN;	/*empty*/
		nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
		/* we support compressed bitmap */
		nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;

		memcpy(nip->icmp6_ni_nonce, nonce,
		    sizeof(nip->icmp6_ni_nonce));
		*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
		cc = ICMP6_NIQLEN;
		datalen = 0;
	} else {
		icp->icmp6_type = ICMP6_ECHO_REQUEST;
		icp->icmp6_code = 0;
		icp->icmp6_id = htons(ident);
		icp->icmp6_seq = ntohs(seq);
		if (timing) {
			struct timeval tv;
			struct tv32 *tv32;
			(void)gettimeofday(&tv, NULL);
			tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
			tv32->tv32_sec = htonl(tv.tv_sec);
			tv32->tv32_usec = htonl(tv.tv_usec);
		}
		cc = ICMP6ECHOLEN + datalen;
	}

#ifdef DIAGNOSTIC
	if (pingerlen() != cc)
		errx(1, "internal error; length mismatch");
#endif

	smsghdr.msg_name = (caddr_t)&dst;
	smsghdr.msg_namelen = sizeof(dst);
	memset(&iov, 0, sizeof(iov));
	iov[0].iov_base = (caddr_t)outpack;
	iov[0].iov_len = cc;
	smsghdr.msg_iov = iov;
	smsghdr.msg_iovlen = 1;

	i = sendmsg(s, &smsghdr, 0);

	if (i < 0 || i != cc)  {
		if (i < 0)
			warn("sendmsg");
		(void)printf("ping6: wrote %s %d chars, ret=%d\n",
		    hostname, cc, i);
	}
	if (!(options & F_QUIET) && options & F_FLOOD)
		(void)write(STDOUT_FILENO, &DOT, 1);

	return(0);
}

int
myechoreply(const struct icmp6_hdr *icp)
{
	if (ntohs(icp->icmp6_id) == ident)
		return 1;
	else
		return 0;
}

int
mynireply(const struct icmp6_nodeinfo *nip)
{
	if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
	    nonce + sizeof(u_int16_t),
	    sizeof(nonce) - sizeof(u_int16_t)) == 0)
		return 1;
	else
		return 0;
}

char *
dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
	size_t bufsiz)
	/*base for compressed name*/
{
	int i;
	const u_char *cp;
	char cresult[MAXDNAME + 1];
	const u_char *comp;
	int l;

	cp = *sp;
	*buf = '\0';

	if (cp >= ep)
		return NULL;
	while (cp < ep) {
		i = *cp;
		if (i == 0 || cp != *sp) {
			if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
				return NULL;	/*result overrun*/
		}
		if (i == 0)
			break;
		cp++;

		if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
			/* DNS compression */
			if (!base)
				return NULL;

			comp = base + (i & 0x3f);
			if (dnsdecode(&comp, cp, base, cresult,
			    sizeof(cresult)) == NULL)
				return NULL;
			if (strlcat(buf, cresult, bufsiz) >= bufsiz)
				return NULL;	/*result overrun*/
			break;
		} else if ((i & 0x3f) == i) {
			if (i > ep - cp)
				return NULL;	/*source overrun*/
			while (i-- > 0 && cp < ep) {
				l = snprintf(cresult, sizeof(cresult),
				    isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
				if (l >= sizeof(cresult) || l < 0)
					return NULL;
				if (strlcat(buf, cresult, bufsiz) >= bufsiz)
					return NULL;	/*result overrun*/
				cp++;
			}
		} else
			return NULL;	/*invalid label*/
	}
	if (i != 0)
		return NULL;	/*not terminated*/
	cp++;
	*sp = cp;
	return buf;
}

/*
 * pr_pack --
 *	Print out the packet, if it came from us.  This logic is necessary
 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
 * which arrive ('tis only fair).  This permits multiple copies of this
 * program to be run without having intermingled output (or statistics!).
 */
void
pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
{
#define safeputc(c)	printf((isprint((c)) ? "%c" : "\\%03o"), c)
	struct icmp6_hdr *icp;
	struct icmp6_nodeinfo *ni;
	int i;
	int hoplim;
	struct sockaddr *from;
	int fromlen;
	u_char *cp = NULL, *dp, *end = buf + cc;
	struct in6_pktinfo *pktinfo = NULL;
	struct timeval tv, tp;
	struct tv32 *tpp;
	double triptime = 0;
	int dupflag;
	size_t off;
	int oldfqdn;
	u_int16_t seq;
	char dnsname[MAXDNAME + 1];

	(void)gettimeofday(&tv, NULL);

	if (!mhdr || !mhdr->msg_name ||
	    mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
	    ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
		if (options & F_VERBOSE)
			warnx("invalid peername");
		return;
	}
	from = (struct sockaddr *)mhdr->msg_name;
	fromlen = mhdr->msg_namelen;
	if (cc < sizeof(struct icmp6_hdr)) {
		if (options & F_VERBOSE)
			warnx("packet too short (%d bytes) from %s", cc,
			    pr_addr(from, fromlen));
		return;
	}
	if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
	    (options & F_VERBOSE) != 0)
		warnx("some control data discarded, insufficient buffer size");
	icp = (struct icmp6_hdr *)buf;
	ni = (struct icmp6_nodeinfo *)buf;
	off = 0;

	if ((hoplim = get_hoplim(mhdr)) == -1) {
		warnx("failed to get receiving hop limit");
		return;
	}
	if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
		warnx("failed to get receiving packet information");
		return;
	}

	if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
		seq = ntohs(icp->icmp6_seq);
		++nreceived;
		if (timing) {
			tpp = (struct tv32 *)(icp + 1);
			tp.tv_sec = ntohl(tpp->tv32_sec);
			tp.tv_usec = ntohl(tpp->tv32_usec);
			tvsub(&tv, &tp);
			triptime = ((double)tv.tv_sec) * 1000.0 +
			    ((double)tv.tv_usec) / 1000.0;
			tsum += triptime;
			tsumsq += triptime * triptime;
			if (triptime < tmin)
				tmin = triptime;
			if (triptime > tmax)
				tmax = triptime;
		}

		if (TST(seq % mx_dup_ck)) {
			++nrepeats;
			--nreceived;
			dupflag = 1;
		} else {
			SET(seq % mx_dup_ck);
			dupflag = 0;
		}

		if (options & F_QUIET)
			return;

		if (options & F_WAITTIME && triptime > waittime) {
			++nrcvtimeout;
			return;
		}

		if (options & F_FLOOD)
			(void)write(STDOUT_FILENO, &BSPACE, 1);
		else {
			if (options & F_AUDIBLE)
				(void)write(STDOUT_FILENO, &BBELL, 1);
			(void)printf("%d bytes from %s, icmp_seq=%u", cc,
			    pr_addr(from, fromlen), seq);
			(void)printf(" hlim=%d", hoplim);
			if ((options & F_VERBOSE) != 0) {
				struct sockaddr_in6 dstsa;

				memset(&dstsa, 0, sizeof(dstsa));
				dstsa.sin6_family = AF_INET6;
				dstsa.sin6_len = sizeof(dstsa);
				dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
				dstsa.sin6_addr = pktinfo->ipi6_addr;
				(void)printf(" dst=%s",
				    pr_addr((struct sockaddr *)&dstsa,
				    sizeof(dstsa)));
			}
			if (timing)
				(void)printf(" time=%.3f ms", triptime);
			if (dupflag)
				(void)printf("(DUP!)");
			/* check the data */
			cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
			dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
			for (i = 8; cp < end; ++i, ++cp, ++dp) {
				if (*cp != *dp) {
					(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
					break;
				}
			}
		}
	} else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
		seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
		++nreceived;
		if (TST(seq % mx_dup_ck)) {
			++nrepeats;
			--nreceived;
			dupflag = 1;
		} else {
			SET(seq % mx_dup_ck);
			dupflag = 0;
		}

		if (options & F_QUIET)
			return;

		(void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));

		switch (ntohs(ni->ni_code)) {
		case ICMP6_NI_SUCCESS:
			break;
		case ICMP6_NI_REFUSED:
			printf("refused, type 0x%x", ntohs(ni->ni_type));
			goto fqdnend;
		case ICMP6_NI_UNKNOWN:
			printf("unknown, type 0x%x", ntohs(ni->ni_type));
			goto fqdnend;
		default:
			printf("unknown code 0x%x, type 0x%x",
			    ntohs(ni->ni_code), ntohs(ni->ni_type));
			goto fqdnend;
		}

		switch (ntohs(ni->ni_qtype)) {
		case NI_QTYPE_NOOP:
			printf("NodeInfo NOOP");
			break;
		case NI_QTYPE_SUPTYPES:
			pr_suptypes(ni, end - (u_char *)ni);
			break;
		case NI_QTYPE_NODEADDR:
			pr_nodeaddr(ni, end - (u_char *)ni);
			break;
		case NI_QTYPE_FQDN:
		default:	/* XXX: for backward compatibility */
			cp = (u_char *)ni + ICMP6_NIRLEN;
			if (buf[off + ICMP6_NIRLEN] ==
			    cc - off - ICMP6_NIRLEN - 1)
				oldfqdn = 1;
			else
				oldfqdn = 0;
			if (oldfqdn) {
				cp++;	/* skip length */
				while (cp < end) {
					safeputc(*cp & 0xff);
					cp++;
				}
			} else {
				i = 0;
				while (cp < end) {
					if (dnsdecode((const u_char **)&cp, end,
					    (const u_char *)(ni + 1), dnsname,
					    sizeof(dnsname)) == NULL) {
						printf("???");
						break;
					}
					/*
					 * name-lookup special handling for
					 * truncated name
					 */
					if (cp + 1 <= end && !*cp &&
					    strlen(dnsname) > 0) {
						dnsname[strlen(dnsname) - 1] = '\0';
						cp++;
					}
					printf("%s%s", i > 0 ? "," : "",
					    dnsname);
				}
			}
			if (options & F_VERBOSE) {
				int32_t ttl;
				int comma = 0;

				(void)printf(" (");	/*)*/

				switch (ni->ni_code) {
				case ICMP6_NI_REFUSED:
					(void)printf("refused");
					comma++;
					break;
				case ICMP6_NI_UNKNOWN:
					(void)printf("unknown qtype");
					comma++;
					break;
				}

				if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
					/* case of refusion, unknown */
					/*(*/
					putchar(')');
					goto fqdnend;
				}
				ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
				if (comma)
					printf(",");
				if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
					(void)printf("TTL=%d:meaningless",
					    (int)ttl);
				} else {
					if (ttl < 0) {
						(void)printf("TTL=%d:invalid",
						   ttl);
					} else
						(void)printf("TTL=%d", ttl);
				}
				comma++;

				if (oldfqdn) {
					if (comma)
						printf(",");
					printf("03 draft");
					comma++;
				} else {
					cp = (u_char *)ni + ICMP6_NIRLEN;
					if (cp == end) {
						if (comma)
							printf(",");
						printf("no name");
						comma++;
					}
				}

				if (buf[off + ICMP6_NIRLEN] !=
				    cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
					if (comma)
						printf(",");
					(void)printf("invalid namelen:%d/%lu",
					    buf[off + ICMP6_NIRLEN],
					    (u_long)cc - off - ICMP6_NIRLEN - 1);
					comma++;
				}
				/*(*/
				putchar(')');
			}
		fqdnend:
			;
		}
	} else {
		/* We've got something other than an ECHOREPLY */
		if (!(options & F_VERBOSE))
			return;
		(void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
		pr_icmph(icp, end);
	}

	if (!(options & F_FLOOD)) {
		(void)putchar('\n');
		if (options & F_VERBOSE)
			pr_exthdrs(mhdr);
		(void)fflush(stdout);
	}
#undef safeputc
}

void
pr_exthdrs(struct msghdr *mhdr)
{
	ssize_t	bufsize;
	void	*bufp;
	struct cmsghdr *cm;

	bufsize = 0;
	bufp = mhdr->msg_control;
	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
		if (cm->cmsg_level != IPPROTO_IPV6)
			continue;

		bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
		if (bufsize <= 0)
			continue; 
		switch (cm->cmsg_type) {
		case IPV6_HOPOPTS:
			printf("  HbH Options: ");
			pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
			break;
		case IPV6_DSTOPTS:
#ifdef IPV6_RTHDRDSTOPTS
		case IPV6_RTHDRDSTOPTS:
#endif
			printf("  Dst Options: ");
			pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
			break;
		case IPV6_RTHDR:
			printf("  Routing: ");
			pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
			break;
		}
	}
}

#ifdef USE_RFC2292BIS
void
pr_ip6opt(void *extbuf, size_t bufsize)
{
	struct ip6_hbh *ext;
	int currentlen;
	u_int8_t type;
	socklen_t extlen, len;
	void *databuf;
	size_t offset;
	u_int16_t value2;
	u_int32_t value4;

	ext = (struct ip6_hbh *)extbuf;
	extlen = (ext->ip6h_len + 1) * 8;
	printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
	    (unsigned int)ext->ip6h_len, (unsigned long)extlen);

	/*
	 * Bounds checking on the ancillary data buffer:
	 *     subtract the size of a cmsg structure from the buffer size.
	 */
	if (bufsize < (extlen  + CMSG_SPACE(0))) {
		extlen = bufsize - CMSG_SPACE(0);
		warnx("options truncated, showing only %u (total=%u)",
		    (unsigned int)(extlen / 8 - 1),
		    (unsigned int)(ext->ip6h_len));
	}

	currentlen = 0;
	while (1) {
		currentlen = inet6_opt_next(extbuf, extlen, currentlen,
		    &type, &len, &databuf);
		if (currentlen == -1)
			break;
		switch (type) {
		/*
		 * Note that inet6_opt_next automatically skips any padding
		 * optins.
		 */
		case IP6OPT_JUMBO:
			offset = 0;
			offset = inet6_opt_get_val(databuf, offset,
			    &value4, sizeof(value4));
			printf("    Jumbo Payload Opt: Length %u\n",
			    (u_int32_t)ntohl(value4));
			break;
		case IP6OPT_ROUTER_ALERT:
			offset = 0;
			offset = inet6_opt_get_val(databuf, offset,
						   &value2, sizeof(value2));
			printf("    Router Alert Opt: Type %u\n",
			    ntohs(value2));
			break;
		default:
			printf("    Received Opt %u len %lu\n",
			    type, (unsigned long)len);
			break;
		}
	}
	return;
}
#else  /* !USE_RFC2292BIS */
/* ARGSUSED */
void
pr_ip6opt(void *extbuf, size_t bufsize __unused)
{
	putchar('\n');
	return;
}
#endif /* USE_RFC2292BIS */

#ifdef USE_RFC2292BIS
void
pr_rthdr(void *extbuf, size_t bufsize)
{
	struct in6_addr *in6;
	char ntopbuf[INET6_ADDRSTRLEN];
	struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
	int i, segments, origsegs, rthsize, size0, size1;

	/* print fixed part of the header */
	printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
	    rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
	if ((segments = inet6_rth_segments(extbuf)) >= 0) {
		printf("%d segments, ", segments);
		printf("%d left\n", rh->ip6r_segleft);
	} else {
		printf("segments unknown, ");
		printf("%d left\n", rh->ip6r_segleft);
		return;
	}

	/*
	 * Bounds checking on the ancillary data buffer. When calculating
	 * the number of items to show keep in mind:
	 *	- The size of the cmsg structure
	 *	- The size of one segment (the size of a Type 0 routing header)
	 *	- When dividing add a fudge factor of one in case the
	 *	  dividend is not evenly divisible by the divisor
	 */
	rthsize = (rh->ip6r_len + 1) * 8;
	if (bufsize < (rthsize + CMSG_SPACE(0))) {
		origsegs = segments;
		size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
		size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
		segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
		    (size1 - size0) + 1;
		warnx("segments truncated, showing only %d (total=%d)",
		    segments, origsegs);
	}

	for (i = 0; i < segments; i++) {
		in6 = inet6_rth_getaddr(extbuf, i);
		if (in6 == NULL)
			printf("   [%d]<NULL>\n", i);
		else {
			if (!inet_ntop(AF_INET6, in6, ntopbuf,
			    sizeof(ntopbuf)))
				strlcpy(ntopbuf, "?", sizeof(ntopbuf));
			printf("   [%d]%s\n", i, ntopbuf);
		}
	}

	return;

}

#else  /* !USE_RFC2292BIS */
/* ARGSUSED */
void
pr_rthdr(void *extbuf, size_t bufsize __unused)
{
	putchar('\n');
	return;
}
#endif /* USE_RFC2292BIS */

int
pr_bitrange(u_int32_t v, int soff, int ii)
{
	int off;
	int i;

	off = 0;
	while (off < 32) {
		/* shift till we have 0x01 */
		if ((v & 0x01) == 0) {
			if (ii > 1)
				printf("-%u", soff + off - 1);
			ii = 0;
			switch (v & 0x0f) {
			case 0x00:
				v >>= 4;
				off += 4;
				continue;
			case 0x08:
				v >>= 3;
				off += 3;
				continue;
			case 0x04: case 0x0c:
				v >>= 2;
				off += 2;
				continue;
			default:
				v >>= 1;
				off += 1;
				continue;
			}
		}

		/* we have 0x01 with us */
		for (i = 0; i < 32 - off; i++) {
			if ((v & (0x01 << i)) == 0)
				break;
		}
		if (!ii)
			printf(" %u", soff + off);
		ii += i;
		v >>= i; off += i;
	}
	return ii;
}

void
pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
	/* ni->qtype must be SUPTYPES */
{
	size_t clen;
	u_int32_t v;
	const u_char *cp, *end;
	u_int16_t cur;
	struct cbit {
		u_int16_t words;	/*32bit count*/
		u_int16_t skip;
	} cbit;
#define MAXQTYPES	(1 << 16)
	size_t off;
	int b;

	cp = (u_char *)(ni + 1);
	end = ((u_char *)ni) + nilen;
	cur = 0;
	b = 0;

	printf("NodeInfo Supported Qtypes");
	if (options & F_VERBOSE) {
		if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
			printf(", compressed bitmap");
		else
			printf(", raw bitmap");
	}

	while (cp < end) {
		clen = (size_t)(end - cp);
		if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
			if (clen == 0 || clen > MAXQTYPES / 8 ||
			    clen % sizeof(v)) {
				printf("???");
				return;
			}
		} else {
			if (clen < sizeof(cbit) || clen % sizeof(v))
				return;
			memcpy(&cbit, cp, sizeof(cbit));
			if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
			    clen)
				return;
			cp += sizeof(cbit);
			clen = ntohs(cbit.words) * sizeof(v);
			if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
			    MAXQTYPES)
				return;
		}

		for (off = 0; off < clen; off += sizeof(v)) {
			memcpy(&v, cp + off, sizeof(v));
			v = (u_int32_t)ntohl(v);
			b = pr_bitrange(v, (int)(cur + off * 8), b);
		}
		/* flush the remaining bits */
		b = pr_bitrange(0, (int)(cur + off * 8), b);

		cp += clen;
		cur += clen * 8;
		if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
			cur += ntohs(cbit.skip) * 32;
	}
}

void
pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
	/* ni->qtype must be NODEADDR */
{
	u_char *cp = (u_char *)(ni + 1);
	char ntop_buf[INET6_ADDRSTRLEN];
	int withttl = 0;

	nilen -= sizeof(struct icmp6_nodeinfo);

	if (options & F_VERBOSE) {
		switch (ni->ni_code) {
		case ICMP6_NI_REFUSED:
			(void)printf("refused");
			break;
		case ICMP6_NI_UNKNOWN:
			(void)printf("unknown qtype");
			break;
		}
		if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
			(void)printf(" truncated");
	}
	putchar('\n');
	if (nilen <= 0)
		printf("  no address\n");

	/*
	 * In icmp-name-lookups 05 and later, TTL of each returned address
	 * is contained in the resposne. We try to detect the version
	 * by the length of the data, but note that the detection algorithm
	 * is incomplete. We assume the latest draft by default.
	 */
	if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
		withttl = 1;
	while (nilen > 0) {
		u_int32_t ttl;

		if (withttl) {
			/* XXX: alignment? */
			ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
			cp += sizeof(u_int32_t);
			nilen -= sizeof(u_int32_t);
		}

		if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
		    NULL)
			strlcpy(ntop_buf, "?", sizeof(ntop_buf));
		printf("  %s", ntop_buf);
		if (withttl) {
			if (ttl == 0xffffffff) {
				/*
				 * XXX: can this convention be applied to all
				 * type of TTL (i.e. non-ND TTL)?
				 */
				printf("(TTL=infty)");
			}
			else
				printf("(TTL=%u)", ttl);
		}
		putchar('\n');

		nilen -= sizeof(struct in6_addr);
		cp += sizeof(struct in6_addr);
	}
}

int
get_hoplim(struct msghdr *mhdr)
{
	struct cmsghdr *cm;

	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
		if (cm->cmsg_len == 0)
			return(-1);

		if (cm->cmsg_level == IPPROTO_IPV6 &&
		    cm->cmsg_type == IPV6_HOPLIMIT &&
		    cm->cmsg_len == CMSG_LEN(sizeof(int)))
			return(*(int *)CMSG_DATA(cm));
	}

	return(-1);
}

struct in6_pktinfo *
get_rcvpktinfo(struct msghdr *mhdr)
{
	struct cmsghdr *cm;

	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
		if (cm->cmsg_len == 0)
			return(NULL);

		if (cm->cmsg_level == IPPROTO_IPV6 &&
		    cm->cmsg_type == IPV6_PKTINFO &&
		    cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
			return((struct in6_pktinfo *)CMSG_DATA(cm));
	}

	return(NULL);
}

int
get_pathmtu(struct msghdr *mhdr)
{
#ifdef IPV6_RECVPATHMTU
	struct cmsghdr *cm;
	struct ip6_mtuinfo *mtuctl = NULL;

	for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
	     cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
		if (cm->cmsg_len == 0)
			return(0);

		if (cm->cmsg_level == IPPROTO_IPV6 &&
		    cm->cmsg_type == IPV6_PATHMTU &&
		    cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
			mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);

			/*
			 * If the notified destination is different from
			 * the one we are pinging, just ignore the info.
			 * We check the scope ID only when both notified value
			 * and our own value have non-0 values, because we may
			 * have used the default scope zone ID for sending,
			 * in which case the scope ID value is 0.
			 */
			if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
						&dst.sin6_addr) ||
			    (mtuctl->ip6m_addr.sin6_scope_id &&
			     dst.sin6_scope_id &&
			     mtuctl->ip6m_addr.sin6_scope_id !=
			     dst.sin6_scope_id)) {
				if ((options & F_VERBOSE) != 0) {
					printf("path MTU for %s is notified. "
					       "(ignored)\n",
					   pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
					   sizeof(mtuctl->ip6m_addr)));
				}
				return(0);
			}

			/*
			 * Ignore an invalid MTU. XXX: can we just believe
			 * the kernel check?
			 */
			if (mtuctl->ip6m_mtu < IPV6_MMTU)
				return(0);

			/* notification for our destination. return the MTU. */
			return((int)mtuctl->ip6m_mtu);
		}
	}
#endif
	return(0);
}

/*
 * tvsub --
 *	Subtract 2 timeval structs:  out = out - in.  Out is assumed to
 * be >= in.
 */
void
tvsub(struct timeval *out, struct timeval *in)
{
	if ((out->tv_usec -= in->tv_usec) < 0) {
		--out->tv_sec;
		out->tv_usec += 1000000;
	}
	out->tv_sec -= in->tv_sec;
}

/*
 * onint --
 *	SIGINT handler.
 */
/* ARGSUSED */
void
onint(int notused __unused)
{
	/*
	 * When doing reverse DNS lookups, the seenint flag might not
	 * be noticed for a while.  Just exit if we get a second SIGINT.
	 */
	if ((options & F_HOSTNAME) && seenint != 0)
		_exit(nreceived ? 0 : 2);
}

/*
 * summary --
 *	Print out statistics.
 */
void
summary(void)
{

	(void)printf("\n--- %s ping6 statistics ---\n", hostname);
	(void)printf("%ld packets transmitted, ", ntransmitted);
	(void)printf("%ld packets received, ", nreceived);
	if (nrepeats)
		(void)printf("+%ld duplicates, ", nrepeats);
	if (ntransmitted) {
		if (nreceived > ntransmitted)
			(void)printf("-- somebody's duplicating packets!");
		else
			(void)printf("%.1f%% packet loss",
			    ((((double)ntransmitted - nreceived) * 100.0) /
			    ntransmitted));
	}
	if (nrcvtimeout)
		printf(", %ld packets out of wait time", nrcvtimeout);
	(void)putchar('\n');
	if (nreceived && timing) {
		/* Only display average to microseconds */
		double num = nreceived + nrepeats;
		double avg = tsum / num;
		double dev = sqrt(tsumsq / num - avg * avg);
		(void)printf(
		    "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
		    tmin, avg, tmax, dev);
		(void)fflush(stdout);
	}
	(void)fflush(stdout);
}

/*subject type*/
static const char *niqcode[] = {
	"IPv6 address",
	"DNS label",	/*or empty*/
	"IPv4 address",
};

/*result code*/
static const char *nircode[] = {
	"Success", "Refused", "Unknown",
};


/*
 * pr_icmph --
 *	Print a descriptive string about an ICMP header.
 */
void
pr_icmph(struct icmp6_hdr *icp, u_char *end)
{
	char ntop_buf[INET6_ADDRSTRLEN];
	struct nd_redirect *red;
	struct icmp6_nodeinfo *ni;
	char dnsname[MAXDNAME + 1];
	const u_char *cp;
	size_t l;

	switch (icp->icmp6_type) {
	case ICMP6_DST_UNREACH:
		switch (icp->icmp6_code) {
		case ICMP6_DST_UNREACH_NOROUTE:
			(void)printf("No Route to Destination\n");
			break;
		case ICMP6_DST_UNREACH_ADMIN:
			(void)printf("Destination Administratively "
			    "Unreachable\n");
			break;
		case ICMP6_DST_UNREACH_BEYONDSCOPE:
			(void)printf("Destination Unreachable Beyond Scope\n");
			break;
		case ICMP6_DST_UNREACH_ADDR:
			(void)printf("Destination Host Unreachable\n");
			break;
		case ICMP6_DST_UNREACH_NOPORT:
			(void)printf("Destination Port Unreachable\n");
			break;
		default:
			(void)printf("Destination Unreachable, Bad Code: %d\n",
			    icp->icmp6_code);
			break;
		}
		/* Print returned IP header information */
		pr_retip((struct ip6_hdr *)(icp + 1), end);
		break;
	case ICMP6_PACKET_TOO_BIG:
		(void)printf("Packet too big mtu = %d\n",
		    (int)ntohl(icp->icmp6_mtu));
		pr_retip((struct ip6_hdr *)(icp + 1), end);
		break;
	case ICMP6_TIME_EXCEEDED:
		switch (icp->icmp6_code) {
		case ICMP6_TIME_EXCEED_TRANSIT:
			(void)printf("Time to live exceeded\n");
			break;
		case ICMP6_TIME_EXCEED_REASSEMBLY:
			(void)printf("Frag reassembly time exceeded\n");
			break;
		default:
			(void)printf("Time exceeded, Bad Code: %d\n",
			    icp->icmp6_code);
			break;
		}
		pr_retip((struct ip6_hdr *)(icp + 1), end);
		break;
	case ICMP6_PARAM_PROB:
		(void)printf("Parameter problem: ");
		switch (icp->icmp6_code) {
		case ICMP6_PARAMPROB_HEADER:
			(void)printf("Erroneous Header ");
			break;
		case ICMP6_PARAMPROB_NEXTHEADER:
			(void)printf("Unknown Nextheader ");
			break;
		case ICMP6_PARAMPROB_OPTION:
			(void)printf("Unrecognized Option ");
			break;
		default:
			(void)printf("Bad code(%d) ", icp->icmp6_code);
			break;
		}
		(void)printf("pointer = 0x%02x\n",
		    (u_int32_t)ntohl(icp->icmp6_pptr));
		pr_retip((struct ip6_hdr *)(icp + 1), end);
		break;
	case ICMP6_ECHO_REQUEST:
		(void)printf("Echo Request");
		/* XXX ID + Seq + Data */
		break;
	case ICMP6_ECHO_REPLY:
		(void)printf("Echo Reply");
		/* XXX ID + Seq + Data */
		break;
	case ICMP6_MEMBERSHIP_QUERY:
		(void)printf("Listener Query");
		break;
	case ICMP6_MEMBERSHIP_REPORT:
		(void)printf("Listener Report");
		break;
	case ICMP6_MEMBERSHIP_REDUCTION:
		(void)printf("Listener Done");
		break;
	case ND_ROUTER_SOLICIT:
		(void)printf("Router Solicitation");
		break;
	case ND_ROUTER_ADVERT:
		(void)printf("Router Advertisement");
		break;
	case ND_NEIGHBOR_SOLICIT:
		(void)printf("Neighbor Solicitation");
		break;
	case ND_NEIGHBOR_ADVERT:
		(void)printf("Neighbor Advertisement");
		break;
	case ND_REDIRECT:
		red = (struct nd_redirect *)icp;
		(void)printf("Redirect\n");
		if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
		    sizeof(ntop_buf)))
			strlcpy(ntop_buf, "?", sizeof(ntop_buf));
		(void)printf("Destination: %s", ntop_buf);
		if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
		    sizeof(ntop_buf)))
			strlcpy(ntop_buf, "?", sizeof(ntop_buf));
		(void)printf(" New Target: %s", ntop_buf);
		break;
	case ICMP6_NI_QUERY:
		(void)printf("Node Information Query");
		/* XXX ID + Seq + Data */
		ni = (struct icmp6_nodeinfo *)icp;
		l = end - (u_char *)(ni + 1);
		printf(", ");
		switch (ntohs(ni->ni_qtype)) {
		case NI_QTYPE_NOOP:
			(void)printf("NOOP");
			break;
		case NI_QTYPE_SUPTYPES:
			(void)printf("Supported qtypes");
			break;
		case NI_QTYPE_FQDN:
			(void)printf("DNS name");
			break;
		case NI_QTYPE_NODEADDR:
			(void)printf("nodeaddr");
			break;
		case NI_QTYPE_IPV4ADDR:
			(void)printf("IPv4 nodeaddr");
			break;
		default:
			(void)printf("unknown qtype");
			break;
		}
		if (options & F_VERBOSE) {
			switch (ni->ni_code) {
			case ICMP6_NI_SUBJ_IPV6:
				if (l == sizeof(struct in6_addr) &&
				    inet_ntop(AF_INET6, ni + 1, ntop_buf,
				    sizeof(ntop_buf)) != NULL) {
					(void)printf(", subject=%s(%s)",
					    niqcode[ni->ni_code], ntop_buf);
				} else {
#if 1
					/* backward compat to -W */
					(void)printf(", oldfqdn");
#else
					(void)printf(", invalid");
#endif
				}
				break;
			case ICMP6_NI_SUBJ_FQDN:
				if (end == (u_char *)(ni + 1)) {
					(void)printf(", no subject");
					break;
				}
				printf(", subject=%s", niqcode[ni->ni_code]);
				cp = (const u_char *)(ni + 1);
				if (dnsdecode(&cp, end, NULL, dnsname,
				    sizeof(dnsname)) != NULL)
					printf("(%s)", dnsname);
				else
					printf("(invalid)");
				break;
			case ICMP6_NI_SUBJ_IPV4:
				if (l == sizeof(struct in_addr) &&
				    inet_ntop(AF_INET, ni + 1, ntop_buf,
				    sizeof(ntop_buf)) != NULL) {
					(void)printf(", subject=%s(%s)",
					    niqcode[ni->ni_code], ntop_buf);
				} else
					(void)printf(", invalid");
				break;
			default:
				(void)printf(", invalid");
				break;
			}
		}
		break;
	case ICMP6_NI_REPLY:
		(void)printf("Node Information Reply");
		/* XXX ID + Seq + Data */
		ni = (struct icmp6_nodeinfo *)icp;
		printf(", ");
		switch (ntohs(ni->ni_qtype)) {
		case NI_QTYPE_NOOP:
			(void)printf("NOOP");
			break;
		case NI_QTYPE_SUPTYPES:
			(void)printf("Supported qtypes");
			break;
		case NI_QTYPE_FQDN:
			(void)printf("DNS name");
			break;
		case NI_QTYPE_NODEADDR:
			(void)printf("nodeaddr");
			break;
		case NI_QTYPE_IPV4ADDR:
			(void)printf("IPv4 nodeaddr");
			break;
		default:
			(void)printf("unknown qtype");
			break;
		}
		if (options & F_VERBOSE) {
			if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
				printf(", invalid");
			else
				printf(", %s", nircode[ni->ni_code]);
		}
		break;
	default:
		(void)printf("Bad ICMP type: %d", icp->icmp6_type);
	}
}

/*
 * pr_iph --
 *	Print an IP6 header.
 */
void
pr_iph(struct ip6_hdr *ip6)
{
	u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
	u_int8_t tc;
	char ntop_buf[INET6_ADDRSTRLEN];

	tc = *(&ip6->ip6_vfc + 1); /* XXX */
	tc = (tc >> 4) & 0x0f;
	tc |= (ip6->ip6_vfc << 4);

	printf("Vr TC  Flow Plen Nxt Hlim\n");
	printf(" %1x %02x %05x %04x  %02x   %02x\n",
	    (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
	    ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
	if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
		strlcpy(ntop_buf, "?", sizeof(ntop_buf));
	printf("%s->", ntop_buf);
	if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
		strlcpy(ntop_buf, "?", sizeof(ntop_buf));
	printf("%s\n", ntop_buf);
}

/*
 * pr_addr --
 *	Return an ascii host address as a dotted quad and optionally with
 * a hostname.
 */
const char *
pr_addr(struct sockaddr *addr, int addrlen)
{
	static char buf[NI_MAXHOST];
	int flag = 0;

	if ((options & F_HOSTNAME) == 0)
		flag |= NI_NUMERICHOST;

	if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
		return (buf);
	else
		return "?";
}

/*
 * pr_retip --
 *	Dump some info on a returned (via ICMPv6) IPv6 packet.
 */
void
pr_retip(struct ip6_hdr *ip6, u_char *end)
{
	u_char *cp = (u_char *)ip6, nh;
	int hlen;

	if (end - (u_char *)ip6 < sizeof(*ip6)) {
		printf("IP6");
		goto trunc;
	}
	pr_iph(ip6);
	hlen = sizeof(*ip6);

	nh = ip6->ip6_nxt;
	cp += hlen;
	while (end - cp >= 8) {
		switch (nh) {
		case IPPROTO_HOPOPTS:
			printf("HBH ");
			hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
			nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
			break;
		case IPPROTO_DSTOPTS:
			printf("DSTOPT ");
			hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
			nh = ((struct ip6_dest *)cp)->ip6d_nxt;
			break;
		case IPPROTO_FRAGMENT:
			printf("FRAG ");
			hlen = sizeof(struct ip6_frag);
			nh = ((struct ip6_frag *)cp)->ip6f_nxt;
			break;
		case IPPROTO_ROUTING:
			printf("RTHDR ");
			hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
			nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
			break;
#ifdef IPSEC
		case IPPROTO_AH:
			printf("AH ");
			hlen = (((struct ah *)cp)->ah_len+2) << 2;
			nh = ((struct ah *)cp)->ah_nxt;
			break;
#endif
		case IPPROTO_ICMPV6:
			printf("ICMP6: type = %d, code = %d\n",
			    *cp, *(cp + 1));
			return;
		case IPPROTO_ESP:
			printf("ESP\n");
			return;
		case IPPROTO_TCP:
			printf("TCP: from port %u, to port %u (decimal)\n",
			    (*cp * 256 + *(cp + 1)),
			    (*(cp + 2) * 256 + *(cp + 3)));
			return;
		case IPPROTO_UDP:
			printf("UDP: from port %u, to port %u (decimal)\n",
			    (*cp * 256 + *(cp + 1)),
			    (*(cp + 2) * 256 + *(cp + 3)));
			return;
		default:
			printf("Unknown Header(%d)\n", nh);
			return;
		}

		if ((cp += hlen) >= end)
			goto trunc;
	}
	if (end - cp < 8)
		goto trunc;

	putchar('\n');
	return;

  trunc:
	printf("...\n");
	return;
}

void
fill(char *bp, char *patp)
{
	int ii, jj, kk;
	int pat[16];
	char *cp;

	for (cp = patp; *cp; cp++)
		if (!isxdigit(*cp))
			errx(1, "patterns must be specified as hex digits");
	ii = sscanf(patp,
	    "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
	    &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
	    &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
	    &pat[13], &pat[14], &pat[15]);

/* xxx */
	if (ii > 0)
		for (kk = 0;
		    kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii);
		    kk += ii)
			for (jj = 0; jj < ii; ++jj)
				bp[jj + kk] = pat[jj];
	if (!(options & F_QUIET)) {
		(void)printf("PATTERN: 0x");
		for (jj = 0; jj < ii; ++jj)
			(void)printf("%02x", bp[jj] & 0xFF);
		(void)printf("\n");
	}
}

#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
int
setpolicy(int so __unused, char *policy)
{
	char *buf;

	if (policy == NULL)
		return 0;	/* ignore */

	buf = ipsec_set_policy(policy, strlen(policy));
	if (buf == NULL)
		errx(1, "%s", ipsec_strerror());
	if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
	    ipsec_get_policylen(buf)) < 0)
		warnx("Unable to set IPsec policy");
	free(buf);

	return 0;
}
#endif
#endif

char *
nigroup(char *name, int nig_oldmcprefix)
{
	char *p;
	char *q;
	MD5_CTX ctxt;
	u_int8_t digest[16];
	u_int8_t c;
	size_t l;
	char hbuf[NI_MAXHOST];
	struct in6_addr in6;
	int valid;

	p = strchr(name, '.');
	if (!p)
		p = name + strlen(name);
	l = p - name;
	if (l > 63 || l > sizeof(hbuf) - 1)
		return NULL;	/*label too long*/
	strncpy(hbuf, name, l);
	hbuf[(int)l] = '\0';

	for (q = name; *q; q++) {
		if (isupper(*(unsigned char *)q))
			*q = tolower(*(unsigned char *)q);
	}

	/* generate 16 bytes of pseudo-random value. */
	memset(&ctxt, 0, sizeof(ctxt));
	MD5Init(&ctxt);
	c = l & 0xff;
	MD5Update(&ctxt, &c, sizeof(c));
	MD5Update(&ctxt, (unsigned char *)name, l);
	MD5Final(digest, &ctxt);

	if (nig_oldmcprefix) {
		/* draft-ietf-ipngwg-icmp-name-lookup */
		valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
	} else {
		/* RFC 4620 */
		valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
	}
	if (valid != 1)
		return NULL;	/*XXX*/
	
	if (nig_oldmcprefix) {
		/* draft-ietf-ipngwg-icmp-name-lookup */
		bcopy(digest, &in6.s6_addr[12], 4);
	} else {
		/* RFC 4620 */
		bcopy(digest, &in6.s6_addr[13], 3);
	}

	if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
		return NULL;

	return strdup(hbuf);
}

void
usage(void)
{
	(void)fprintf(stderr,
#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
	    "A"
#endif
	    "usage: ping6 [-"
	    "Dd"
#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
	    "E"
#endif
	    "fH"
#ifdef IPV6_USE_MIN_MTU
	    "m"
#endif
	    "nNoqrRtvwW] "
	    "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
	    "             [-h hoplimit] [-I interface] [-i wait] [-l preload]"
#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
	    " [-P policy]"
#endif
	    "\n"
	    "             [-p pattern] [-S sourceaddr] [-s packetsize] "
	    "[-x waittime]\n"
	    "             [-X timeout] [hops ...] host\n");
	exit(1);
}
OpenPOWER on IntegriCloud