netstat.tproj/inet6.c

   1 /*
   2  * Copyright (c) 2008-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*      BSDI inet.c,v 2.3 1995/10/24 02:19:29 prb Exp   */
  30 /*
  31  * Copyright (c) 1983, 1988, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  * $FreeBSD: src/usr.bin/netstat/inet6.c,v 1.3.2.9 2001/08/10 09:07:09 ru Exp $
  63  */
  64
  65 #ifdef INET6
  66 #include <sys/param.h>
  67 #include <sys/socket.h>
  68 #include <sys/socketvar.h>
  69 #include <sys/ioctl.h>
  70 #include <sys/sysctl.h>
  71
  72 #include <net/route.h>
  73 #include <net/if.h>
  74 #include <net/if_var.h>
  75 #include <net/net_perf.h>
  76 #include <netinet/in.h>
  77 #include <netinet/ip6.h>
  78 #include <netinet/icmp6.h>
  79 #include <netinet/in_systm.h>
  80 #include <netinet6/in6_pcb.h>
  81 #include <netinet6/in6_var.h>
  82 #include <netinet6/ip6_var.h>
  83 #include <netinet6/raw_ip6.h>
  84
  85 #include <arpa/inet.h>
  86 #include <netdb.h>
  87
  88 #include <stdio.h>
  89 #include <string.h>
  90 #include <unistd.h>
  91 #include "netstat.h"
  92
  93 #if defined(__APPLE__) && !defined(__unused)
  94 #define __unused
  95 #endif
  96
  97 char    *inet6name (struct in6_addr *);
  98 void    inet6print (struct in6_addr *, int, char *, int);
  99
 100 static  char *ip6nh[] = {
 101         "hop by hop",
 102         "ICMP",
 103         "IGMP",
 104         "#3",
 105         "IP",
 106         "#5",
 107         "TCP",
 108         "#7",
 109         "#8",
 110         "#9",
 111         "#10",
 112         "#11",
 113         "#12",
 114         "#13",
 115         "#14",
 116         "#15",
 117         "#16",
 118         "UDP",
 119         "#18",
 120         "#19",
 121         "#20",
 122         "#21",
 123         "IDP",
 124         "#23",
 125         "#24",
 126         "#25",
 127         "#26",
 128         "#27",
 129         "#28",
 130         "TP",
 131         "#30",
 132         "#31",
 133         "#32",
 134         "#33",
 135         "#34",
 136         "#35",
 137         "#36",
 138         "#37",
 139         "#38",
 140         "#39",
 141         "#40",
 142         "IP6",
 143         "#42",
 144         "routing",
 145         "fragment",
 146         "#45",
 147         "#46",
 148         "#47",
 149         "#48",
 150         "#49",
 151         "ESP",
 152         "AH",
 153         "#52",
 154         "#53",
 155         "#54",
 156         "#55",
 157         "#56",
 158         "#57",
 159         "ICMP6",
 160         "no next header",
 161         "destination option",
 162         "#61",
 163         "mobility",
 164         "#63",
 165         "#64",
 166         "#65",
 167         "#66",
 168         "#67",
 169         "#68",
 170         "#69",
 171         "#70",
 172         "#71",
 173         "#72",
 174         "#73",
 175         "#74",
 176         "#75",
 177         "#76",
 178         "#77",
 179         "#78",
 180         "#79",
 181         "ISOIP",
 182         "#81",
 183         "#82",
 184         "#83",
 185         "#84",
 186         "#85",
 187         "#86",
 188         "#87",
 189         "#88",
 190         "OSPF",
 191         "#80",
 192         "#91",
 193         "#92",
 194         "#93",
 195         "#94",
 196         "#95",
 197         "#96",
 198         "Ethernet",
 199         "#98",
 200         "#99",
 201         "#100",
 202         "#101",
 203         "#102",
 204         "PIM",
 205         "#104",
 206         "#105",
 207         "#106",
 208         "#107",
 209         "#108",
 210         "#109",
 211         "#110",
 212         "#111",
 213         "#112",
 214         "#113",
 215         "#114",
 216         "#115",
 217         "#116",
 218         "#117",
 219         "#118",
 220         "#119",
 221         "#120",
 222         "#121",
 223         "#122",
 224         "#123",
 225         "#124",
 226         "#125",
 227         "#126",
 228         "#127",
 229         "#128",
 230         "#129",
 231         "#130",
 232         "#131",
 233         "#132",
 234         "#133",
 235         "#134",
 236         "#135",
 237         "#136",
 238         "#137",
 239         "#138",
 240         "#139",
 241         "#140",
 242         "#141",
 243         "#142",
 244         "#143",
 245         "#144",
 246         "#145",
 247         "#146",
 248         "#147",
 249         "#148",
 250         "#149",
 251         "#150",
 252         "#151",
 253         "#152",
 254         "#153",
 255         "#154",
 256         "#155",
 257         "#156",
 258         "#157",
 259         "#158",
 260         "#159",
 261         "#160",
 262         "#161",
 263         "#162",
 264         "#163",
 265         "#164",
 266         "#165",
 267         "#166",
 268         "#167",
 269         "#168",
 270         "#169",
 271         "#170",
 272         "#171",
 273         "#172",
 274         "#173",
 275         "#174",
 276         "#175",
 277         "#176",
 278         "#177",
 279         "#178",
 280         "#179",
 281         "#180",
 282         "#181",
 283         "#182",
 284         "#183",
 285         "#184",
 286         "#185",
 287         "#186",
 288         "#187",
 289         "#188",
 290         "#189",
 291         "#180",
 292         "#191",
 293         "#192",
 294         "#193",
 295         "#194",
 296         "#195",
 297         "#196",
 298         "#197",
 299         "#198",
 300         "#199",
 301         "#200",
 302         "#201",
 303         "#202",
 304         "#203",
 305         "#204",
 306         "#205",
 307         "#206",
 308         "#207",
 309         "#208",
 310         "#209",
 311         "#210",
 312         "#211",
 313         "#212",
 314         "#213",
 315         "#214",
 316         "#215",
 317         "#216",
 318         "#217",
 319         "#218",
 320         "#219",
 321         "#220",
 322         "#221",
 323         "#222",
 324         "#223",
 325         "#224",
 326         "#225",
 327         "#226",
 328         "#227",
 329         "#228",
 330         "#229",
 331         "#230",
 332         "#231",
 333         "#232",
 334         "#233",
 335         "#234",
 336         "#235",
 337         "#236",
 338         "#237",
 339         "#238",
 340         "#239",
 341         "#240",
 342         "#241",
 343         "#242",
 344         "#243",
 345         "#244",
 346         "#245",
 347         "#246",
 348         "#247",
 349         "#248",
 350         "#249",
 351         "#250",
 352         "#251",
 353         "#252",
 354         "#253",
 355         "#254",
 356         "#255",
 357 };
 358
 359
 360 static const char *srcrulenames[IP6S_SRCRULE_COUNT] = {
 361         "default",                      // IP6S_SRCRULE_0
 362         "prefer same address",          // IP6S_SRCRULE_1
 363         "prefer appropriate scope",     // IP6S_SRCRULE_2
 364         "avoid deprecated addresses",   // IP6S_SRCRULE_3
 365         "prefer home addresses",        // IP6S_SRCRULE_4
 366         "prefer outgoing interface",    // IP6S_SRCRULE_5
 367         "prefer addresses in a prefix advertised by the next-hop",
 368                                         // IP6S_SRCRULE_5_5
 369         "prefer matching label",        // IP6S_SRCRULE_6
 370         "prefer temporary addresses",   // IP6S_SRCRULE_7
 371         "prefer addresses on alive interfaces", // IP6S_SRCRULE_7x
 372         "use longest matching prefix",  // IP6S_SRCRULE_8
 373         NULL,
 374         NULL,
 375         NULL,
 376         NULL,
 377         NULL
 378 };
 379
 380 /*
 381  * Dump IP6 statistics structure.
 382  */
 383 void
 384 ip6_stats(uint32_t off __unused, char *name, int af __unused)
 385 {
 386         static struct ip6stat pip6stat;
 387         struct ip6stat ip6stat;
 388         int first, i;
 389         int mib[4];
 390         size_t len;
 391         static net_perf_t pout_net_perf, pin_net_perf;
 392         net_perf_t out_net_perf, in_net_perf;
 393         size_t out_net_perf_len = sizeof (out_net_perf);
 394         size_t in_net_perf_len = sizeof (in_net_perf);
 395
 396         if (sysctlbyname("net.inet6.ip6.output_perf_data", &out_net_perf, &out_net_perf_len, 0, 0) < 0) {
 397                 perror("sysctl: net.inet6.ip6.output_perf_data");
 398                 return;
 399         }
 400
 401         if (sysctlbyname("net.inet6.ip6.input_perf_data", &in_net_perf, &in_net_perf_len, 0, 0) < 0) {
 402                 perror("sysctl: net.inet6.ip6.input_perf_data");
 403                 return;
 404         }
 405
 406         mib[0] = CTL_NET;
 407         mib[1] = PF_INET6;
 408         mib[2] = IPPROTO_IPV6;
 409         mib[3] = IPV6CTL_STATS;
 410
 411         len = sizeof ip6stat;
 412         memset(&ip6stat, 0, len);
 413         if (sysctl(mib, 4, &ip6stat, &len, (void *)0, 0) < 0)
 414                 return;
 415     if (interval && vflag > 0)
 416         print_time();
 417         printf("%s:\n", name);
 418
 419 #define IP6DIFF(f) (ip6stat.f - pip6stat.f)
 420 #define p(f, m) if (IP6DIFF(f) || sflag <= 1) \
 421     printf(m, (unsigned long long)IP6DIFF(f), plural(IP6DIFF(f)))
 422 #define p1a(f, m) if (IP6DIFF(f) || sflag <= 1) \
 423     printf(m, (unsigned long long)IP6DIFF(f))
 424
 425         p(ip6s_total, "\t%llu total packet%s received\n");
 426         p1a(ip6s_toosmall, "\t\t%llu with size smaller than minimum\n");
 427         p1a(ip6s_tooshort, "\t\t%llu with data size < data length\n");
 428         p1a(ip6s_adj, "\t\t%llu with data size > data length\n");
 429         p(ip6s_adj_hwcsum_clr,
 430             "\t\t\t%llu packet%s forced to software checksum\n");
 431         p1a(ip6s_badoptions, "\t\t%llu with bad options\n");
 432         p1a(ip6s_badvers, "\t\t%llu with incorrect version number\n");
 433         p(ip6s_fragments, "\t\t%llu fragment%s received\n");
 434         p1a(ip6s_fragdropped,
 435             "\t\t\t%llu dropped (dup or out of space)\n");
 436         p1a(ip6s_fragtimeout, "\t\t\t%llu dropped after timeout\n");
 437         p1a(ip6s_fragoverflow, "\t\t\t%llu exceeded limit\n");
 438         p1a(ip6s_reassembled, "\t\t\t%llu reassembled ok\n");
 439         p1a(ip6s_atmfrag_rcvd, "\t\t\t%llu atomic fragments received\n");
 440         p(ip6s_delivered, "\t\t%llu packet%s for this host\n");
 441         p(ip6s_forward, "\t\t%llu packet%s forwarded\n");
 442         p(ip6s_cantforward, "\t\t%llu packet%s not forwardable\n");
 443         p(ip6s_redirectsent, "\t\t%llu redirect%s sent\n");
 444         p(ip6s_notmember, "\t\t%llu multicast packet%s which we don't join\n");
 445         p(ip6s_exthdrtoolong,
 446             "\t\t%llu packet%s whose headers are not continuous\n");
 447         p(ip6s_nogif, "\t\t%llu tunneling packet%s that can't find gif\n");
 448         p(ip6s_toomanyhdr,
 449             "\t\t%llu packet%s discarded due to too may headers\n");
 450         p1a(ip6s_forward_cachehit, "\t\t%llu forward cache hit\n");
 451         p1a(ip6s_forward_cachemiss, "\t\t%llu forward cache miss\n");
 452         p(ip6s_pktdropcntrl,
 453             "\t\t%llu packet%s dropped due to no bufs for control data\n");
 454
 455 #define INPERFDIFF(f) (in_net_perf.f - pin_net_perf.f)
 456         if (INPERFDIFF(np_total_pkts) > 0 && in_net_perf.np_total_usecs > 0) {
 457                 printf("\tInput Performance Stats:\n");
 458                 printf("\t\t%llu total packets measured\n", INPERFDIFF(np_total_pkts));
 459                 printf("\t\t%llu total usec elapsed\n", INPERFDIFF(np_total_usecs));
 460                 printf("\t\t%f usec per packet\n",
 461                     (double)in_net_perf.np_total_usecs/(double)in_net_perf.np_total_pkts);
 462                 printf("\t\tPerformance Histogram:\n");
 463                 printf("\t\t\t x <= %u: %llu\n", in_net_perf.np_hist_bars[0],
 464                     INPERFDIFF(np_hist1));
 465                 printf("\t\t\t %u < x <= %u: %llu\n",
 466                     in_net_perf.np_hist_bars[0], in_net_perf.np_hist_bars[1],
 467                     INPERFDIFF(np_hist2));
 468                 printf("\t\t\t %u < x <= %u: %llu\n",
 469                     in_net_perf.np_hist_bars[1], in_net_perf.np_hist_bars[2],
 470                     INPERFDIFF(np_hist3));
 471                 printf("\t\t\t %u < x <= %u: %llu\n",
 472                     in_net_perf.np_hist_bars[2], in_net_perf.np_hist_bars[3],
 473                     INPERFDIFF(np_hist4));
 474                 printf("\t\t\t %u < x: %llu\n",
 475                     in_net_perf.np_hist_bars[3], INPERFDIFF(np_hist5));
 476         }
 477 #undef INPERFDIFF
 478
 479         p(ip6s_localout, "\t%llu packet%s sent from this host\n");
 480         p(ip6s_rawout, "\t\t%llu packet%s sent with fabricated ip header\n");
 481         p(ip6s_odropped,
 482             "\t\t%llu output packet%s dropped due to no bufs, etc.\n");
 483         p(ip6s_noroute, "\t\t%llu output packet%s discarded due to no route\n");
 484         p(ip6s_fragmented, "\t\t%llu output datagram%s fragmented\n");
 485         p(ip6s_ofragments, "\t\t%llu fragment%s created\n");
 486         p(ip6s_cantfrag, "\t\t%llu datagram%s that can't be fragmented\n");
 487         p(ip6s_badscope, "\t\t%llu packet%s that violated scope rules\n");
 488
 489 #define OUTPERFDIFF(f) (out_net_perf.f - pout_net_perf.f)
 490         if (OUTPERFDIFF(np_total_pkts) > 0 && out_net_perf.np_total_usecs > 0) {
 491                 printf("\tOutput Performance Stats:\n");
 492                 printf("\t\t%llu total packets measured\n", OUTPERFDIFF(np_total_pkts));
 493                 printf("\t\t%llu total usec elapsed\n", OUTPERFDIFF(np_total_usecs));
 494                 printf("\t\t%f usec per packet\n",
 495                     (double)out_net_perf.np_total_usecs/(double)out_net_perf.np_total_pkts);
 496                 printf("\t\tHistogram:\n");
 497                 printf("\t\t\t x <= %u: %llu\n", out_net_perf.np_hist_bars[0],
 498                     OUTPERFDIFF(np_hist1));
 499                 printf("\t\t\t %u < x <= %u: %llu\n",
 500                     out_net_perf.np_hist_bars[0], out_net_perf.np_hist_bars[1],
 501                     OUTPERFDIFF(np_hist2));
 502                 printf("\t\t\t %u < x <= %u: %llu\n",
 503                     out_net_perf.np_hist_bars[1], out_net_perf.np_hist_bars[2],
 504                     OUTPERFDIFF(np_hist3));
 505                 printf("\t\t\t %u < x <= %u: %llu\n",
 506                     out_net_perf.np_hist_bars[2], out_net_perf.np_hist_bars[3],
 507                     OUTPERFDIFF(np_hist4));
 508                 printf("\t\t\t %u < x: %llu\n",
 509                     out_net_perf.np_hist_bars[3], OUTPERFDIFF(np_hist5));
 510         }
 511 #undef OUTPERFDIFF
 512
 513         for (first = 1, i = 0; i < 256; i++)
 514                 if (IP6DIFF(ip6s_nxthist[i]) != 0) {
 515                         if (first) {
 516                                 printf("\tInput histogram:\n");
 517                                 first = 0;
 518                         }
 519                         printf("\t\t%s: %llu\n", ip6nh[i],
 520                             (unsigned long long)IP6DIFF(ip6s_nxthist[i]));
 521                 }
 522         printf("\tMbuf statistics:\n");
 523         printf("\t\t%llu one mbuf\n", (unsigned long long)IP6DIFF(ip6s_m1));
 524         for (first = 1, i = 0; i < 32; i++) {
 525                 char ifbuf[IFNAMSIZ];
 526                 if (IP6DIFF(ip6s_m2m[i]) != 0) {
 527                         if (first) {
 528                                 printf("\t\ttwo or more mbuf:\n");
 529                                 first = 0;
 530                         }
 531                         printf("\t\t\t%s= %llu\n",
 532                             if_indextoname(i, ifbuf),
 533                             (unsigned long long)IP6DIFF(ip6s_m2m[i]));
 534                 }
 535         }
 536         printf("\t\t%llu one ext mbuf\n",
 537             (unsigned long long)IP6DIFF(ip6s_mext1));
 538         printf("\t\t%llu two or more ext mbuf\n",
 539             (unsigned long long)IP6DIFF(ip6s_mext2m));
 540
 541         /* for debugging source address selection */
 542 #define PRINT_SCOPESTAT(s,i) do {\
 543                 switch(i) { /* XXX hardcoding in each case */\
 544                 case 1:\
 545                         p(s, "\t\t\t%llu node-local%s\n");\
 546                         break;\
 547                 case 2:\
 548                         p(s,"\t\t\t%llu link-local%s\n");\
 549                         break;\
 550                 case 5:\
 551                         p(s,"\t\t\t%llu site-local%s\n");\
 552                         break;\
 553                 case 14:\
 554                         p(s,"\t\t\t%llu global%s\n");\
 555                         break;\
 556                 default:\
 557                         printf("\t\t\t%llu addresses scope=%x\n",\
 558                             (unsigned long long)IP6DIFF(s), i);\
 559                 }\
 560         } while (0);
 561
 562         p(ip6s_sources_none,
 563           "\t\t%llu failure%s of source address selection\n");
 564         for (first = 1, i = 0; i < SCOPE6_ID_MAX; i++) {
 565                 if (IP6DIFF(ip6s_sources_sameif[i]) || 1) {
 566                         if (first) {
 567                                 printf("\t\tsource addresses on an outgoing I/F\n");
 568                                 first = 0;
 569                         }
 570                         PRINT_SCOPESTAT(ip6s_sources_sameif[i], i);
 571                 }
 572         }
 573         for (first = 1, i = 0; i < SCOPE6_ID_MAX; i++) {
 574                 if (IP6DIFF(ip6s_sources_otherif[i]) || 1) {
 575                         if (first) {
 576                                 printf("\t\tsource addresses on a non-outgoing I/F\n");
 577                                 first = 0;
 578                         }
 579                         PRINT_SCOPESTAT(ip6s_sources_otherif[i], i);
 580                 }
 581         }
 582         for (first = 1, i = 0; i < SCOPE6_ID_MAX; i++) {
 583                 if (IP6DIFF(ip6s_sources_samescope[i]) || 1) {
 584                         if (first) {
 585                                 printf("\t\tsource addresses of same scope\n");
 586                                 first = 0;
 587                         }
 588                         PRINT_SCOPESTAT(ip6s_sources_samescope[i], i);
 589                 }
 590         }
 591         for (first = 1, i = 0; i < SCOPE6_ID_MAX; i++) {
 592                 if (IP6DIFF(ip6s_sources_otherscope[i]) || 1) {
 593                         if (first) {
 594                                 printf("\t\tsource addresses of a different scope\n");
 595                                 first = 0;
 596                         }
 597                         PRINT_SCOPESTAT(ip6s_sources_otherscope[i], i);
 598                 }
 599         }
 600         for (first = 1, i = 0; i < SCOPE6_ID_MAX; i++) {
 601                 if (IP6DIFF(ip6s_sources_deprecated[i]) || 1) {
 602                         if (first) {
 603                                 printf("\t\tdeprecated source addresses\n");
 604                                 first = 0;
 605                         }
 606                         PRINT_SCOPESTAT(ip6s_sources_deprecated[i], i);
 607                 }
 608         }
 609 #define PRINT_SRCRULESTAT(s,i) do {\
 610         if (srcrulenames[i] != NULL) \
 611                 printf("\t\t\t%llu rule%s %s\n", \
 612                         (unsigned long long)IP6DIFF(s), \
 613                         plural(IP6DIFF(s)), \
 614                         srcrulenames[i]); \
 615 } while (0);
 616
 617         for (first = 1, i = 0; i < IP6S_SRCRULE_COUNT; i++) {
 618                 if (IP6DIFF(ip6s_sources_rule[i]) || 1) {
 619                         if (first) {
 620                                 printf("\t\tsource address selection\n");
 621                                 first = 0;
 622                         }
 623                         PRINT_SRCRULESTAT(ip6s_sources_rule[i], i);
 624                 }
 625         }
 626
 627         p(ip6s_dad_collide, "\t\t%llu duplicate address detection collision%s\n");
 628
 629         p(ip6s_dad_loopcount, "\t\t%llu duplicate address detection NS loop%s\n");
 630
 631         p(ip6s_sources_skip_expensive_secondary_if, "\t\t%llu time%s ignored source on secondary expensive I/F\n");
 632
 633         if (interval > 0) {
 634                 bcopy(&ip6stat, &pip6stat, len);
 635                 bcopy(&in_net_perf, &pin_net_perf, in_net_perf_len);
 636                 bcopy(&out_net_perf, &pout_net_perf, out_net_perf_len);
 637         }
 638 #undef IP6DIFF
 639 #undef p
 640 #undef p1a
 641 }
 642
 643 /*
 644  * Dump IPv6 per-interface statistics based on RFC 2465.
 645  */
 646 void
 647 ip6_ifstats(char *ifname)
 648 {
 649         struct in6_ifreq ifr;
 650         int s;
 651 #define p(f, m) if (ifr.ifr_ifru.ifru_stat.f || sflag <= 1) \
 652     printf(m, (unsigned long long)ifr.ifr_ifru.ifru_stat.f, plural(ifr.ifr_ifru.ifru_stat.f))
 653 #define p_5(f, m) if (ifr.ifr_ifru.ifru_stat.f || sflag <= 1) \
 654     printf(m, (unsigned long long)ip6stat.f)
 655
 656         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 657                 perror("Warning: socket(AF_INET6)");
 658                 return;
 659         }
 660
 661     if (interval && vflag > 0)
 662         print_time();
 663         strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 664         printf("ip6 on %s:\n", ifr.ifr_name);
 665
 666         if (ioctl(s, SIOCGIFSTAT_IN6, (char *)&ifr) < 0) {
 667                 perror("Warning: ioctl(SIOCGIFSTAT_IN6)");
 668                 goto end;
 669         }
 670
 671         p(ifs6_in_receive, "\t%llu total input datagram%s\n");
 672         p(ifs6_in_hdrerr, "\t%llu datagram%s with invalid header received\n");
 673         p(ifs6_in_toobig, "\t%llu datagram%s exceeded MTU received\n");
 674         p(ifs6_in_noroute, "\t%llu datagram%s with no route received\n");
 675         p(ifs6_in_addrerr, "\t%llu datagram%s with invalid dst received\n");
 676         p(ifs6_in_protounknown, "\t%llu datagram%s with unknown proto received\n");
 677         p(ifs6_in_truncated, "\t%llu truncated datagram%s received\n");
 678         p(ifs6_in_discard, "\t%llu input datagram%s discarded\n");
 679         p(ifs6_in_deliver,
 680           "\t%llu datagram%s delivered to an upper layer protocol\n");
 681         p(ifs6_out_forward, "\t%llu datagram%s forwarded to this interface\n");
 682         p(ifs6_out_request,
 683           "\t%llu datagram%s sent from an upper layer protocol\n");
 684         p(ifs6_out_discard, "\t%llu total discarded output datagram%s\n");
 685         p(ifs6_out_fragok, "\t%llu output datagram%s fragmented\n");
 686         p(ifs6_out_fragfail, "\t%llu output datagram%s failed on fragment\n");
 687         p(ifs6_out_fragcreat, "\t%llu output datagram%s succeeded on fragment\n");
 688         p(ifs6_reass_reqd, "\t%llu incoming datagram%s fragmented\n");
 689         p(ifs6_reass_ok, "\t%llu datagram%s reassembled\n");
 690         p(ifs6_atmfrag_rcvd, "\t%llu atomic fragments%s received\n");
 691         p(ifs6_reass_fail, "\t%llu datagram%s failed on reassembling\n");
 692         p(ifs6_in_mcast, "\t%llu multicast datagram%s received\n");
 693         p(ifs6_out_mcast, "\t%llu multicast datagram%s sent\n");
 694
 695   end:
 696         close(s);
 697
 698 #undef p
 699 #undef p_5
 700 }
 701
 702 static  char *icmp6names[] = {
 703         "#0",
 704         "unreach",
 705         "packet too big",
 706         "time exceed",
 707         "parameter problem",
 708         "#5",
 709         "#6",
 710         "#7",
 711         "#8",
 712         "#9",
 713         "#10",
 714         "#11",
 715         "#12",
 716         "#13",
 717         "#14",
 718         "#15",
 719         "#16",
 720         "#17",
 721         "#18",
 722         "#19",
 723         "#20",
 724         "#21",
 725         "#22",
 726         "#23",
 727         "#24",
 728         "#25",
 729         "#26",
 730         "#27",
 731         "#28",
 732         "#29",
 733         "#30",
 734         "#31",
 735         "#32",
 736         "#33",
 737         "#34",
 738         "#35",
 739         "#36",
 740         "#37",
 741         "#38",
 742         "#39",
 743         "#40",
 744         "#41",
 745         "#42",
 746         "#43",
 747         "#44",
 748         "#45",
 749         "#46",
 750         "#47",
 751         "#48",
 752         "#49",
 753         "#50",
 754         "#51",
 755         "#52",
 756         "#53",
 757         "#54",
 758         "#55",
 759         "#56",
 760         "#57",
 761         "#58",
 762         "#59",
 763         "#60",
 764         "#61",
 765         "#62",
 766         "#63",
 767         "#64",
 768         "#65",
 769         "#66",
 770         "#67",
 771         "#68",
 772         "#69",
 773         "#70",
 774         "#71",
 775         "#72",
 776         "#73",
 777         "#74",
 778         "#75",
 779         "#76",
 780         "#77",
 781         "#78",
 782         "#79",
 783         "#80",
 784         "#81",
 785         "#82",
 786         "#83",
 787         "#84",
 788         "#85",
 789         "#86",
 790         "#87",
 791         "#88",
 792         "#89",
 793         "#80",
 794         "#91",
 795         "#92",
 796         "#93",
 797         "#94",
 798         "#95",
 799         "#96",
 800         "#97",
 801         "#98",
 802         "#99",
 803         "#100",
 804         "#101",
 805         "#102",
 806         "#103",
 807         "#104",
 808         "#105",
 809         "#106",
 810         "#107",
 811         "#108",
 812         "#109",
 813         "#110",
 814         "#111",
 815         "#112",
 816         "#113",
 817         "#114",
 818         "#115",
 819         "#116",
 820         "#117",
 821         "#118",
 822         "#119",
 823         "#120",
 824         "#121",
 825         "#122",
 826         "#123",
 827         "#124",
 828         "#125",
 829         "#126",
 830         "#127",
 831         "echo",
 832         "echo reply",
 833         "multicast listener query",
 834         "MLDv1 listener report",
 835         "MLDv1 listener done",
 836         "router solicitation",
 837         "router advertisement",
 838         "neighbor solicitation",
 839         "neighbor advertisement",
 840         "redirect",
 841         "router renumbering",
 842         "node information request",
 843         "node information reply",
 844         "inverse neighbor solicitation",
 845         "inverse neighbor advertisement",
 846         "MLDv2 listener report",
 847         "#144",
 848         "#145",
 849         "#146",
 850         "#147",
 851         "#148",
 852         "#149",
 853         "#150",
 854         "#151",
 855         "#152",
 856         "#153",
 857         "#154",
 858         "#155",
 859         "#156",
 860         "#157",
 861         "#158",
 862         "#159",
 863         "#160",
 864         "#161",
 865         "#162",
 866         "#163",
 867         "#164",
 868         "#165",
 869         "#166",
 870         "#167",
 871         "#168",
 872         "#169",
 873         "#170",
 874         "#171",
 875         "#172",
 876         "#173",
 877         "#174",
 878         "#175",
 879         "#176",
 880         "#177",
 881         "#178",
 882         "#179",
 883         "#180",
 884         "#181",
 885         "#182",
 886         "#183",
 887         "#184",
 888         "#185",
 889         "#186",
 890         "#187",
 891         "#188",
 892         "#189",
 893         "#180",
 894         "#191",
 895         "#192",
 896         "#193",
 897         "#194",
 898         "#195",
 899         "#196",
 900         "#197",
 901         "#198",
 902         "#199",
 903         "#200",
 904         "#201",
 905         "#202",
 906         "#203",
 907         "#204",
 908         "#205",
 909         "#206",
 910         "#207",
 911         "#208",
 912         "#209",
 913         "#210",
 914         "#211",
 915         "#212",
 916         "#213",
 917         "#214",
 918         "#215",
 919         "#216",
 920         "#217",
 921         "#218",
 922         "#219",
 923         "#220",
 924         "#221",
 925         "#222",
 926         "#223",
 927         "#224",
 928         "#225",
 929         "#226",
 930         "#227",
 931         "#228",
 932         "#229",
 933         "#230",
 934         "#231",
 935         "#232",
 936         "#233",
 937         "#234",
 938         "#235",
 939         "#236",
 940         "#237",
 941         "#238",
 942         "#239",
 943         "#240",
 944         "#241",
 945         "#242",
 946         "#243",
 947         "#244",
 948         "#245",
 949         "#246",
 950         "#247",
 951         "#248",
 952         "#249",
 953         "#250",
 954         "#251",
 955         "#252",
 956         "#253",
 957         "#254",
 958         "#255",
 959 };
 960
 961 /*
 962  * Dump ICMP6 statistics.
 963  */
 964 void
 965 icmp6_stats(uint32_t off __unused, char *name, int af __unused)
 966 {
 967         static struct icmp6stat picmp6stat;
 968         struct icmp6stat icmp6stat;
 969         register int i, first;
 970         int mib[4];
 971         size_t len;
 972
 973         mib[0] = CTL_NET;
 974         mib[1] = PF_INET6;
 975         mib[2] = IPPROTO_ICMPV6;
 976         mib[3] = ICMPV6CTL_STATS;
 977
 978         len = sizeof icmp6stat;
 979         memset(&icmp6stat, 0, len);
 980         if (sysctl(mib, 4, &icmp6stat, &len, (void *)0, 0) < 0)
 981                 return;
 982     if (interval && vflag > 0)
 983         print_time();
 984         printf("%s:\n", name);
 985
 986 #define ICMP6DIFF(f) (icmp6stat.f - picmp6stat.f)
 987 #define p(f, m) if (ICMP6DIFF(f) || sflag <= 1) \
 988     printf(m, (unsigned long long)ICMP6DIFF(f), plural(ICMP6DIFF(f)))
 989 #define p_5(f, m) printf(m, (unsigned long long)ICMP6DIFF(f))
 990
 991         p(icp6s_error, "\t%llu call%s to icmp_error\n");
 992         p(icp6s_canterror,
 993             "\t%llu error%s not generated because old message was icmp error or so\n");
 994         p(icp6s_toofreq,
 995           "\t%llu error%s not generated because rate limitation\n");
 996 #define NELEM (sizeof(icmp6stat.icp6s_outhist)/sizeof(icmp6stat.icp6s_outhist[0]))
 997         for (first = 1, i = 0; i < NELEM; i++)
 998                 if (ICMP6DIFF(icp6s_outhist[i]) != 0) {
 999                         if (first) {
1000                                 printf("\tOutput histogram:\n");
1001                                 first = 0;
1002                         }
1003                         printf("\t\t%s: %llu\n", icmp6names[i],
1004                             (unsigned long long)ICMP6DIFF(icp6s_outhist[i]));
1005                 }
1006 #undef NELEM
1007         p(icp6s_badcode, "\t%llu message%s with bad code fields\n");
1008         p(icp6s_tooshort, "\t%llu message%s < minimum length\n");
1009         p(icp6s_checksum, "\t%llu bad checksum%s\n");
1010         p(icp6s_badlen, "\t%llu message%s with bad length\n");
1011 #define NELEM (sizeof(icmp6stat.icp6s_inhist)/sizeof(icmp6stat.icp6s_inhist[0]))
1012         for (first = 1, i = 0; i < NELEM; i++)
1013                 if (ICMP6DIFF(icp6s_inhist[i]) != 0) {
1014                         if (first) {
1015                                 printf("\tInput histogram:\n");
1016                                 first = 0;
1017                         }
1018                         printf("\t\t%s: %llu\n", icmp6names[i],
1019                             (unsigned long long)ICMP6DIFF(icp6s_inhist[i]));
1020                 }
1021 #undef NELEM
1022         printf("\tHistogram of error messages to be generated:\n");
1023         p_5(icp6s_odst_unreach_noroute, "\t\t%llu no route\n");
1024         p_5(icp6s_odst_unreach_admin, "\t\t%llu administratively prohibited\n");
1025         p_5(icp6s_odst_unreach_beyondscope, "\t\t%llu beyond scope\n");
1026         p_5(icp6s_odst_unreach_addr, "\t\t%llu address unreachable\n");
1027         p_5(icp6s_odst_unreach_noport, "\t\t%llu port unreachable\n");
1028         p_5(icp6s_opacket_too_big, "\t\t%llu packet too big\n");
1029         p_5(icp6s_otime_exceed_transit, "\t\t%llu time exceed transit\n");
1030         p_5(icp6s_otime_exceed_reassembly, "\t\t%llu time exceed reassembly\n");
1031         p_5(icp6s_oparamprob_header, "\t\t%llu erroneous header field\n");
1032         p_5(icp6s_oparamprob_nextheader, "\t\t%llu unrecognized next header\n");
1033         p_5(icp6s_oparamprob_option, "\t\t%llu unrecognized option\n");
1034         p_5(icp6s_oredirect, "\t\t%llu redirect\n");
1035         p_5(icp6s_ounknown, "\t\t%llu unknown\n");
1036
1037         p(icp6s_reflect, "\t%llu message response%s generated\n");
1038         p(icp6s_nd_toomanyopt, "\t%llu message%s with too many ND options\n");
1039         p(icp6s_nd_badopt, "\t%qu message%s with bad ND options\n");
1040         p(icp6s_badns, "\t%qu bad neighbor solicitation message%s\n");
1041         p(icp6s_badna, "\t%qu bad neighbor advertisement message%s\n");
1042         p(icp6s_badrs, "\t%qu bad router solicitation message%s\n");
1043         p(icp6s_badra, "\t%qu bad router advertisement message%s\n");
1044         p(icp6s_badredirect, "\t%qu bad redirect message%s\n");
1045         p(icp6s_pmtuchg, "\t%llu path MTU change%s\n");
1046         p(icp6s_rfc6980_drop, "\t%qu dropped fragmented NDP message%s\n");
1047
1048         if (interval > 0)
1049                 bcopy(&icmp6stat, &picmp6stat, len);
1050
1051 #undef ICMP6DIFF
1052 #undef p
1053 #undef p_5
1054 }
1055
1056 /*
1057  * Dump ICMPv6 per-interface statistics based on RFC 2466.
1058  */
1059 void
1060 icmp6_ifstats(char *ifname)
1061 {
1062         struct in6_ifreq ifr;
1063         int s;
1064 #define p(f, m) if (ifr.ifr_ifru.ifru_icmp6stat.f || sflag <= 1) \
1065     printf(m, (unsigned long long)ifr.ifr_ifru.ifru_icmp6stat.f, plural(ifr.ifr_ifru.ifru_icmp6stat.f))
1066
1067         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1068                 perror("Warning: socket(AF_INET6)");
1069                 return;
1070         }
1071
1072     if (interval && vflag > 0)
1073         print_time();
1074         strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1075         printf("icmp6 on %s:\n", ifr.ifr_name);
1076
1077         if (ioctl(s, SIOCGIFSTAT_ICMP6, (char *)&ifr) < 0) {
1078                 perror("Warning: ioctl(SIOCGIFSTAT_ICMP6)");
1079                 goto end;
1080         }
1081
1082         p(ifs6_in_msg, "\t%llu total input message%s\n");
1083         p(ifs6_in_error, "\t%llu total input error message%s\n");
1084         p(ifs6_in_dstunreach, "\t%llu input destination unreachable error%s\n");
1085         p(ifs6_in_adminprohib, "\t%llu input administratively prohibited error%s\n");
1086         p(ifs6_in_timeexceed, "\t%llu input time exceeded error%s\n");
1087         p(ifs6_in_paramprob, "\t%llu input parameter problem error%s\n");
1088         p(ifs6_in_pkttoobig, "\t%llu input packet too big error%s\n");
1089         p(ifs6_in_echo, "\t%llu input echo request%s\n");
1090         p(ifs6_in_echoreply, "\t%llu input echo reply%s\n");
1091         p(ifs6_in_routersolicit, "\t%llu input router solicitation%s\n");
1092         p(ifs6_in_routeradvert, "\t%llu input router advertisement%s\n");
1093         p(ifs6_in_neighborsolicit, "\t%llu input neighbor solicitation%s\n");
1094         p(ifs6_in_neighboradvert, "\t%llu input neighbor advertisement%s\n");
1095         p(ifs6_in_redirect, "\t%llu input redirect%s\n");
1096         p(ifs6_in_mldquery, "\t%llu input MLD query%s\n");
1097         p(ifs6_in_mldreport, "\t%llu input MLD report%s\n");
1098         p(ifs6_in_mlddone, "\t%llu input MLD done%s\n");
1099
1100         p(ifs6_out_msg, "\t%llu total output message%s\n");
1101         p(ifs6_out_error, "\t%llu total output error message%s\n");
1102         p(ifs6_out_dstunreach, "\t%llu output destination unreachable error%s\n");
1103         p(ifs6_out_adminprohib, "\t%llu output administratively prohibited error%s\n");
1104         p(ifs6_out_timeexceed, "\t%llu output time exceeded error%s\n");
1105         p(ifs6_out_paramprob, "\t%llu output parameter problem error%s\n");
1106         p(ifs6_out_pkttoobig, "\t%llu output packet too big error%s\n");
1107         p(ifs6_out_echo, "\t%llu output echo request%s\n");
1108         p(ifs6_out_echoreply, "\t%llu output echo reply%s\n");
1109         p(ifs6_out_routersolicit, "\t%llu output router solicitation%s\n");
1110         p(ifs6_out_routeradvert, "\t%llu output router advertisement%s\n");
1111         p(ifs6_out_neighborsolicit, "\t%llu output neighbor solicitation%s\n");
1112         p(ifs6_out_neighboradvert, "\t%llu output neighbor advertisement%s\n");
1113         p(ifs6_out_redirect, "\t%llu output redirect%s\n");
1114         p(ifs6_out_mldquery, "\t%llu output MLD query%s\n");
1115         p(ifs6_out_mldreport, "\t%llu output MLD report%s\n");
1116         p(ifs6_out_mlddone, "\t%llu output MLD done%s\n");
1117
1118   end:
1119         close(s);
1120 #undef p
1121 }
1122
1123 /*
1124  * Dump raw ip6 statistics structure.
1125  */
1126 void
1127 rip6_stats(uint32_t off __unused, char *name, int af __unused)
1128 {
1129         static struct rip6stat prip6stat;
1130         struct rip6stat rip6stat;
1131         u_quad_t delivered;
1132         int mib[4];
1133         size_t l;
1134
1135         mib[0] = CTL_NET;
1136         mib[1] = PF_INET6;
1137         mib[2] = IPPROTO_IPV6;
1138         mib[3] = IPV6CTL_RIP6STATS;
1139         l = sizeof(rip6stat);
1140         if (sysctl(mib, 4, &rip6stat, &l, NULL, 0) < 0) {
1141                 perror("Warning: sysctl(net.inet6.ip6.rip6stats)");
1142                 return;
1143         }
1144
1145     if (interval && vflag > 0)
1146         print_time();
1147         printf("%s:\n", name);
1148
1149 #define RIP6DIFF(f) (rip6stat.f - prip6stat.f)
1150 #define p(f, m) if (RIP6DIFF(f) || sflag <= 1) \
1151     printf(m, (unsigned long long)RIP6DIFF(f), plural(RIP6DIFF(f)))
1152         p(rip6s_ipackets, "\t%llu message%s received\n");
1153         p(rip6s_isum, "\t%llu checksum calculation%s on inbound\n");
1154         p(rip6s_badsum, "\t%llu message%s with bad checksum\n");
1155         p(rip6s_nosock, "\t%llu message%s dropped due to no socket\n");
1156         p(rip6s_nosockmcast,
1157             "\t%llu multicast message%s dropped due to no socket\n");
1158         p(rip6s_fullsock,
1159             "\t%llu message%s dropped due to full socket buffers\n");
1160         delivered = RIP6DIFF(rip6s_ipackets) -
1161                     RIP6DIFF(rip6s_badsum) -
1162                     RIP6DIFF(rip6s_nosock) -
1163                     RIP6DIFF(rip6s_nosockmcast) -
1164                     RIP6DIFF(rip6s_fullsock);
1165         if (delivered || sflag <= 1)
1166                 printf("\t%llu delivered\n", (unsigned long long)delivered);
1167         p(rip6s_opackets, "\t%llu datagram%s output\n");
1168
1169         if (interval > 0)
1170                 bcopy(&rip6stat, &prip6stat, l);
1171
1172 #undef RIP6DIFF
1173 #undef p
1174 }
1175
1176 /*
1177  * Pretty print an Internet address (net address + port).
1178  * If the nflag was specified, use numbers instead of names.
1179  */
1180 #ifdef SRVCACHE
1181 extern struct servent * _serv_cache_getservbyport(int port, char *proto);
1182
1183 #define GETSERVBYPORT6(port, proto, ret)\
1184 {\
1185         if (strcmp((proto), "tcp6") == 0)\
1186                 (ret) = _serv_cache_getservbyport((int)(port), "tcp");\
1187         else if (strcmp((proto), "udp6") == 0)\
1188                 (ret) = _serv_cache_getservbyport((int)(port), "udp");\
1189         else\
1190                 (ret) = _serv_cache_getservbyport((int)(port), (proto));\
1191 };
1192 #else
1193 #define GETSERVBYPORT6(port, proto, ret)\
1194 {\
1195         if (strcmp((proto), "tcp6") == 0)\
1196                 (ret) = getservbyport((int)(port), "tcp");\
1197         else if (strcmp((proto), "udp6") == 0)\
1198                 (ret) = getservbyport((int)(port), "udp");\
1199         else\
1200                 (ret) = getservbyport((int)(port), (proto));\
1201 };
1202 #endif
1203 void
1204 inet6print(struct in6_addr *in6, int port, char *proto, int numeric)
1205 {
1206         struct servent *sp = 0;
1207         char line[80], *cp;
1208         int width;
1209
1210         snprintf(line, sizeof(line), "%.*s.", lflag ? 39 :
1211                 (Aflag && !numeric) ? 12 : 16, inet6name(in6));
1212         cp = index(line, '\0');
1213         if (!numeric && port)
1214                 GETSERVBYPORT6(port, proto, sp);
1215         if (sp || port == 0)
1216                 snprintf(cp, sizeof(line) - (cp - line), "%.15s", sp ? sp->s_name : "*");
1217         else
1218                 snprintf(cp, sizeof(line) - (cp - line), "%d", ntohs((u_short)port));
1219         width = lflag ? 45 : Aflag ? 18 : 22;
1220         printf("%-*.*s ", width, width, line);
1221 }
1222
1223 /*
1224  * Construct an Internet address representation.
1225  * If the nflag has been supplied, give
1226  * numeric value, otherwise try for symbolic name.
1227  */
1228
1229 char *
1230 inet6name(struct in6_addr *in6p)
1231 {
1232         register char *cp;
1233         static char line[50];
1234         struct hostent *hp;
1235         static char domain[MAXHOSTNAMELEN];
1236         static int first = 1;
1237         char hbuf[NI_MAXHOST];
1238         struct sockaddr_in6 sin6;
1239         const int niflag = NI_NUMERICHOST;
1240
1241         if (first && !nflag) {
1242                 first = 0;
1243                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
1244                     (cp = index(domain, '.')))
1245                         (void) memmove(domain, cp + 1, strlen(cp + 1) + 1);
1246                 else
1247                         domain[0] = 0;
1248         }
1249         cp = 0;
1250         if (!nflag && !IN6_IS_ADDR_UNSPECIFIED(in6p)) {
1251                 hp = gethostbyaddr((char *)in6p, sizeof(*in6p), AF_INET6);
1252                 if (hp) {
1253                         if ((cp = index(hp->h_name, '.')) &&
1254                             !strcmp(cp + 1, domain))
1255                                 *cp = 0;
1256                         cp = hp->h_name;
1257                 }
1258         }
1259         if (IN6_IS_ADDR_UNSPECIFIED(in6p))
1260                 strlcpy(line, "*", sizeof(line));
1261         else if (cp)
1262                 strlcpy(line, cp, sizeof(line));
1263         else {
1264                 memset(&sin6, 0, sizeof(sin6));
1265                 sin6.sin6_len = sizeof(sin6);
1266                 sin6.sin6_family = AF_INET6;
1267                 sin6.sin6_addr = *in6p;
1268
1269                 if (IN6_IS_ADDR_LINKLOCAL(in6p) ||
1270                     IN6_IS_ADDR_MC_NODELOCAL(in6p) ||
1271                     IN6_IS_ADDR_MC_LINKLOCAL(in6p)) {
1272                         sin6.sin6_scope_id =
1273                             ntohs(*(u_int16_t *)&in6p->s6_addr[2]);
1274                         sin6.sin6_addr.s6_addr[2] = 0;
1275                         sin6.sin6_addr.s6_addr[3] = 0;
1276                 }
1277
1278                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
1279                                 hbuf, sizeof(hbuf), NULL, 0, niflag) != 0)
1280                         strlcpy(hbuf, "?", sizeof(hbuf));
1281                 strlcpy(line, hbuf, sizeof(line));
1282         }
1283         return (line);
1284 }
1285 #endif /*INET6*/