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Annotation of src/usr.bin/netstat/inet6.c, Revision 1.46

1.46    ! mpi         1: /*     $OpenBSD: inet6.c,v 1.45 2014/06/23 03:46:17 guenther Exp $     */
1.1       itojun      2: /*     BSDI inet.c,v 2.3 1995/10/24 02:19:29 prb Exp   */
                      3: /*
                      4:  * Copyright (c) 1983, 1988, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
1.29      millert    15:  * 3. Neither the name of the University nor the names of its contributors
1.1       itojun     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
                     31:
                     32: #include <sys/param.h>
                     33: #include <sys/socket.h>
                     34: #include <sys/socketvar.h>
                     35: #include <sys/ioctl.h>
                     36: #include <sys/protosw.h>
1.35      deraadt    37: #include <sys/sysctl.h>
1.1       itojun     38:
                     39: #include <net/route.h>
                     40: #include <net/if.h>
                     41: #include <netinet/in.h>
                     42: #include <netinet/ip6.h>
                     43: #include <netinet/icmp6.h>
                     44: #include <netinet/ip.h>
                     45: #include <netinet/ip_var.h>
1.5       itojun     46: #include <netinet6/ip6_var.h>
1.1       itojun     47: #include <netinet6/in6_var.h>
                     48: #include <netinet6/pim6_var.h>
1.21      itojun     49: #include <netinet6/raw_ip6.h>
1.40      michele    50: #include <netinet6/ip6_divert.h>
1.1       itojun     51:
                     52: #include <arpa/inet.h>
                     53: #if 0
                     54: #include "gethostbyname2.h"
                     55: #endif
                     56: #include <netdb.h>
                     57:
1.37      chl        58: #include <err.h>
                     59: #include <errno.h>
1.1       itojun     60: #include <stdio.h>
                     61: #include <string.h>
                     62: #include <unistd.h>
                     63: #include "netstat.h"
                     64:
                     65: struct socket sockb;
                     66:
1.18      millert    67: char   *inet6name(struct in6_addr *);
                     68: void   inet6print(struct in6_addr *, int, char *);
1.1       itojun     69:
                     70: static char *ip6nh[] = {
                     71:        "hop by hop",
                     72:        "ICMP",
                     73:        "IGMP",
                     74:        "#3",
                     75:        "IP",
                     76:        "#5",
                     77:        "TCP",
                     78:        "#7",
                     79:        "#8",
                     80:        "#9",
                     81:        "#10",
                     82:        "#11",
                     83:        "#12",
                     84:        "#13",
                     85:        "#14",
                     86:        "#15",
                     87:        "#16",
                     88:        "UDP",
                     89:        "#18",
1.17      mickey     90:        "#19",
1.1       itojun     91:        "#20",
                     92:        "#21",
                     93:        "IDP",
                     94:        "#23",
                     95:        "#24",
                     96:        "#25",
                     97:        "#26",
                     98:        "#27",
                     99:        "#28",
1.17      mickey    100:        "TP",
1.1       itojun    101:        "#30",
                    102:        "#31",
                    103:        "#32",
                    104:        "#33",
                    105:        "#34",
                    106:        "#35",
                    107:        "#36",
                    108:        "#37",
                    109:        "#38",
1.17      mickey    110:        "#39",
1.1       itojun    111:        "#40",
                    112:        "IP6",
                    113:        "#42",
                    114:        "routing",
                    115:        "fragment",
                    116:        "#45",
                    117:        "#46",
                    118:        "#47",
                    119:        "#48",
1.17      mickey    120:        "#49",
1.1       itojun    121:        "ESP",
                    122:        "AH",
                    123:        "#52",
                    124:        "#53",
                    125:        "#54",
                    126:        "#55",
                    127:        "#56",
                    128:        "#57",
                    129:        "ICMP6",
1.17      mickey    130:        "no next header",
1.1       itojun    131:        "destination option",
                    132:        "#61",
                    133:        "#62",
                    134:        "#63",
                    135:        "#64",
                    136:        "#65",
                    137:        "#66",
                    138:        "#67",
                    139:        "#68",
1.17      mickey    140:        "#69",
1.1       itojun    141:        "#70",
                    142:        "#71",
                    143:        "#72",
                    144:        "#73",
                    145:        "#74",
                    146:        "#75",
                    147:        "#76",
                    148:        "#77",
                    149:        "#78",
1.17      mickey    150:        "#79",
1.1       itojun    151:        "ISOIP",
                    152:        "#81",
                    153:        "#82",
                    154:        "#83",
                    155:        "#84",
                    156:        "#85",
                    157:        "#86",
                    158:        "#87",
                    159:        "#88",
1.17      mickey    160:        "OSPF",
1.1       itojun    161:        "#80",
                    162:        "#91",
                    163:        "#92",
                    164:        "#93",
                    165:        "#94",
                    166:        "#95",
                    167:        "#96",
                    168:        "Ethernet",
                    169:        "#98",
1.17      mickey    170:        "#99",
1.1       itojun    171:        "#100",
                    172:        "#101",
                    173:        "#102",
                    174:        "PIM",
                    175:        "#104",
                    176:        "#105",
                    177:        "#106",
                    178:        "#107",
                    179:        "#108",
1.17      mickey    180:        "#109",
1.1       itojun    181:        "#110",
                    182:        "#111",
                    183:        "#112",
                    184:        "#113",
                    185:        "#114",
                    186:        "#115",
                    187:        "#116",
                    188:        "#117",
                    189:        "#118",
1.17      mickey    190:        "#119",
1.1       itojun    191:        "#120",
                    192:        "#121",
                    193:        "#122",
                    194:        "#123",
                    195:        "#124",
                    196:        "#125",
                    197:        "#126",
                    198:        "#127",
                    199:        "#128",
1.17      mickey    200:        "#129",
1.1       itojun    201:        "#130",
                    202:        "#131",
                    203:        "#132",
                    204:        "#133",
                    205:        "#134",
                    206:        "#135",
                    207:        "#136",
                    208:        "#137",
                    209:        "#138",
1.17      mickey    210:        "#139",
1.1       itojun    211:        "#140",
                    212:        "#141",
                    213:        "#142",
                    214:        "#143",
                    215:        "#144",
                    216:        "#145",
                    217:        "#146",
                    218:        "#147",
                    219:        "#148",
1.17      mickey    220:        "#149",
1.1       itojun    221:        "#150",
                    222:        "#151",
                    223:        "#152",
                    224:        "#153",
                    225:        "#154",
                    226:        "#155",
                    227:        "#156",
                    228:        "#157",
                    229:        "#158",
1.17      mickey    230:        "#159",
1.1       itojun    231:        "#160",
                    232:        "#161",
                    233:        "#162",
                    234:        "#163",
                    235:        "#164",
                    236:        "#165",
                    237:        "#166",
                    238:        "#167",
                    239:        "#168",
1.17      mickey    240:        "#169",
1.1       itojun    241:        "#170",
                    242:        "#171",
                    243:        "#172",
                    244:        "#173",
                    245:        "#174",
                    246:        "#175",
                    247:        "#176",
                    248:        "#177",
                    249:        "#178",
1.17      mickey    250:        "#179",
1.1       itojun    251:        "#180",
                    252:        "#181",
                    253:        "#182",
                    254:        "#183",
                    255:        "#184",
                    256:        "#185",
                    257:        "#186",
                    258:        "#187",
                    259:        "#188",
1.17      mickey    260:        "#189",
1.1       itojun    261:        "#180",
                    262:        "#191",
                    263:        "#192",
                    264:        "#193",
                    265:        "#194",
                    266:        "#195",
                    267:        "#196",
                    268:        "#197",
                    269:        "#198",
1.17      mickey    270:        "#199",
1.1       itojun    271:        "#200",
                    272:        "#201",
                    273:        "#202",
                    274:        "#203",
                    275:        "#204",
                    276:        "#205",
                    277:        "#206",
                    278:        "#207",
                    279:        "#208",
1.17      mickey    280:        "#209",
1.1       itojun    281:        "#210",
                    282:        "#211",
                    283:        "#212",
                    284:        "#213",
                    285:        "#214",
                    286:        "#215",
                    287:        "#216",
                    288:        "#217",
                    289:        "#218",
1.17      mickey    290:        "#219",
1.1       itojun    291:        "#220",
                    292:        "#221",
                    293:        "#222",
                    294:        "#223",
                    295:        "#224",
                    296:        "#225",
                    297:        "#226",
                    298:        "#227",
                    299:        "#228",
1.17      mickey    300:        "#229",
1.1       itojun    301:        "#230",
                    302:        "#231",
                    303:        "#232",
                    304:        "#233",
                    305:        "#234",
                    306:        "#235",
                    307:        "#236",
                    308:        "#237",
                    309:        "#238",
1.17      mickey    310:        "#239",
1.1       itojun    311:        "#240",
                    312:        "#241",
                    313:        "#242",
                    314:        "#243",
                    315:        "#244",
                    316:        "#245",
                    317:        "#246",
                    318:        "#247",
                    319:        "#248",
1.17      mickey    320:        "#249",
1.1       itojun    321:        "#250",
                    322:        "#251",
                    323:        "#252",
                    324:        "#253",
                    325:        "#254",
                    326:        "#255",
                    327: };
                    328:
                    329: /*
                    330:  * Dump IP6 statistics structure.
                    331:  */
                    332: void
1.35      deraadt   333: ip6_stats(char *name)
1.1       itojun    334: {
                    335:        struct ip6stat ip6stat;
                    336:        int first, i;
1.14      itojun    337:        struct protoent *ep;
                    338:        const char *n;
1.45      guenther  339:        int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_STATS };
1.35      deraadt   340:        size_t len = sizeof(ip6stat);
1.1       itojun    341:
1.35      deraadt   342:        if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
                    343:            &ip6stat, &len, NULL, 0) == -1) {
                    344:                if (errno != ENOPROTOOPT)
1.44      guenther  345:                        warn("%s", name);
1.1       itojun    346:                return;
1.35      deraadt   347:        }
1.1       itojun    348:
                    349:        printf("%s:\n", name);
                    350: #define        p(f, m) if (ip6stat.f || sflag <= 1) \
1.20      deraadt   351:        printf(m, (unsigned long long)ip6stat.f, plural(ip6stat.f))
1.1       itojun    352: #define        p1(f, m) if (ip6stat.f || sflag <= 1) \
1.20      deraadt   353:        printf(m, (unsigned long long)ip6stat.f)
1.1       itojun    354:
1.14      itojun    355:        p(ip6s_total, "\t%llu total packet%s received\n");
                    356:        p1(ip6s_toosmall, "\t%llu with size smaller than minimum\n");
                    357:        p1(ip6s_tooshort, "\t%llu with data size < data length\n");
                    358:        p1(ip6s_badoptions, "\t%llu with bad options\n");
                    359:        p1(ip6s_badvers, "\t%llu with incorrect version number\n");
                    360:        p(ip6s_fragments, "\t%llu fragment%s received\n");
                    361:        p(ip6s_fragdropped,
1.23      jsyn      362:            "\t%llu fragment%s dropped (duplicates or out of space)\n");
1.14      itojun    363:        p(ip6s_fragtimeout, "\t%llu fragment%s dropped after timeout\n");
                    364:        p(ip6s_fragoverflow, "\t%llu fragment%s that exceeded limit\n");
                    365:        p(ip6s_reassembled, "\t%llu packet%s reassembled ok\n");
                    366:        p(ip6s_delivered, "\t%llu packet%s for this host\n");
                    367:        p(ip6s_forward, "\t%llu packet%s forwarded\n");
                    368:        p(ip6s_cantforward, "\t%llu packet%s not forwardable\n");
                    369:        p(ip6s_redirectsent, "\t%llu redirect%s sent\n");
                    370:        p(ip6s_localout, "\t%llu packet%s sent from this host\n");
                    371:        p(ip6s_rawout, "\t%llu packet%s sent with fabricated ip header\n");
                    372:        p(ip6s_odropped,
                    373:            "\t%llu output packet%s dropped due to no bufs, etc.\n");
                    374:        p(ip6s_noroute, "\t%llu output packet%s discarded due to no route\n");
                    375:        p(ip6s_fragmented, "\t%llu output datagram%s fragmented\n");
                    376:        p(ip6s_ofragments, "\t%llu fragment%s created\n");
                    377:        p(ip6s_cantfrag, "\t%llu datagram%s that can't be fragmented\n");
                    378:        p(ip6s_badscope, "\t%llu packet%s that violated scope rules\n");
                    379:        p(ip6s_notmember, "\t%llu multicast packet%s which we don't join\n");
1.39      tedu      380:        for (first = 1, i = 0; i < 256; i++)
1.1       itojun    381:                if (ip6stat.ip6s_nxthist[i] != 0) {
1.39      tedu      382:                        if (first) {
                    383:                                printf("\tInput packet histogram:\n");
                    384:                                first = 0;
                    385:                        }
1.14      itojun    386:                        n = NULL;
                    387:                        if (ip6nh[i])
                    388:                                n = ip6nh[i];
                    389:                        else if ((ep = getprotobynumber(i)) != NULL)
                    390:                                n = ep->p_name;
                    391:                        if (n)
1.39      tedu      392:                                printf("\t\t%s: %llu\n", n,
                    393:                                    (unsigned long long)ip6stat.ip6s_nxthist[i]);
1.14      itojun    394:                        else
1.39      tedu      395:                                printf("\t\t#%d: %llu\n", i,
                    396:                                    (unsigned long long)ip6stat.ip6s_nxthist[i]);
1.1       itojun    397:                }
1.10      itojun    398:        printf("\tMbuf statistics:\n");
1.14      itojun    399:        p(ip6s_m1, "\t\t%llu one mbuf%s\n");
1.1       itojun    400:        for (first = 1, i = 0; i < 32; i++) {
                    401:                char ifbuf[IFNAMSIZ];
1.17      mickey    402:                if (ip6stat.ip6s_m2m[i] != 0) {
1.1       itojun    403:                        if (first) {
1.39      tedu      404:                                printf("\t\ttwo or more mbuf:\n");
1.1       itojun    405:                                first = 0;
                    406:                        }
1.14      itojun    407:                        printf("\t\t\t%s = %llu\n",
1.20      deraadt   408:                            if_indextoname(i, ifbuf),
                    409:                            (unsigned long long)ip6stat.ip6s_m2m[i]);
1.1       itojun    410:                }
                    411:        }
1.14      itojun    412:        p(ip6s_mext1, "\t\t%llu one ext mbuf%s\n");
                    413:        p(ip6s_mext2m, "\t\t%llu two or more ext mbuf%s\n");
                    414:        p(ip6s_nogif, "\t%llu tunneling packet%s that can't find gif\n");
                    415:        p(ip6s_toomanyhdr,
                    416:            "\t%llu packet%s discarded due to too many headers\n");
1.5       itojun    417:
                    418:        /* for debugging source address selection */
                    419: #define PRINT_SCOPESTAT(s,i) do {\
                    420:                switch(i) { /* XXX hardcoding in each case */\
                    421:                case 1:\
1.14      itojun    422:                        p(s, "\t\t%llu node-local%s\n");\
1.5       itojun    423:                        break;\
                    424:                case 2:\
1.14      itojun    425:                        p(s, "\t\t%llu link-local%s\n");\
1.5       itojun    426:                        break;\
                    427:                case 5:\
1.14      itojun    428:                        p(s, "\t\t%llu site-local%s\n");\
1.5       itojun    429:                        break;\
                    430:                case 14:\
1.14      itojun    431:                        p(s, "\t\t%llu global%s\n");\
1.5       itojun    432:                        break;\
                    433:                default:\
1.14      itojun    434:                        printf("\t\t%llu addresses scope=%x\n",\
1.20      deraadt   435:                            (unsigned long long)ip6stat.s, i);\
1.5       itojun    436:                }\
                    437:        } while(0);
                    438:
                    439:        p(ip6s_sources_none,
1.20      deraadt   440:            "\t%llu failure%s of source address selection\n");
1.5       itojun    441:        for (first = 1, i = 0; i < 16; i++) {
                    442:                if (ip6stat.ip6s_sources_sameif[i]) {
                    443:                        if (first) {
                    444:                                printf("\tsource addresses on an outgoing I/F\n");
                    445:                                first = 0;
                    446:                        }
                    447:                        PRINT_SCOPESTAT(ip6s_sources_sameif[i], i);
                    448:                }
                    449:        }
                    450:        for (first = 1, i = 0; i < 16; i++) {
                    451:                if (ip6stat.ip6s_sources_otherif[i]) {
                    452:                        if (first) {
                    453:                                printf("\tsource addresses on a non-outgoing I/F\n");
                    454:                                first = 0;
                    455:                        }
                    456:                        PRINT_SCOPESTAT(ip6s_sources_otherif[i], i);
                    457:                }
                    458:        }
                    459:        for (first = 1, i = 0; i < 16; i++) {
                    460:                if (ip6stat.ip6s_sources_samescope[i]) {
                    461:                        if (first) {
                    462:                                printf("\tsource addresses of same scope\n");
                    463:                                first = 0;
                    464:                        }
                    465:                        PRINT_SCOPESTAT(ip6s_sources_samescope[i], i);
                    466:                }
                    467:        }
                    468:        for (first = 1, i = 0; i < 16; i++) {
                    469:                if (ip6stat.ip6s_sources_otherscope[i]) {
                    470:                        if (first) {
                    471:                                printf("\tsource addresses of a different scope\n");
                    472:                                first = 0;
                    473:                        }
                    474:                        PRINT_SCOPESTAT(ip6s_sources_otherscope[i], i);
                    475:                }
                    476:        }
                    477:        for (first = 1, i = 0; i < 16; i++) {
                    478:                if (ip6stat.ip6s_sources_deprecated[i]) {
                    479:                        if (first) {
                    480:                                printf("\tdeprecated source addresses\n");
                    481:                                first = 0;
                    482:                        }
                    483:                        PRINT_SCOPESTAT(ip6s_sources_deprecated[i], i);
                    484:                }
                    485:        }
1.8       itojun    486:
                    487:        p1(ip6s_forward_cachehit, "\t%llu forward cache hit\n");
                    488:        p1(ip6s_forward_cachemiss, "\t%llu forward cache miss\n");
1.1       itojun    489: #undef p
                    490: #undef p1
                    491: }
                    492:
                    493: /*
                    494:  * Dump IPv6 per-interface statistics based on RFC 2465.
                    495:  */
                    496: void
1.25      deraadt   497: ip6_ifstats(char *ifname)
1.1       itojun    498: {
                    499:        struct in6_ifreq ifr;
                    500:        int s;
1.20      deraadt   501:
1.1       itojun    502: #define        p(f, m) if (ifr.ifr_ifru.ifru_stat.f || sflag <= 1) \
1.20      deraadt   503:        printf(m, (unsigned long long)ifr.ifr_ifru.ifru_stat.f, \
                    504:            plural(ifr.ifr_ifru.ifru_stat.f))
1.1       itojun    505: #define        p_5(f, m) if (ifr.ifr_ifru.ifru_stat.f || sflag <= 1) \
1.20      deraadt   506:        printf(m, (unsigned long long)ip6stat.f)
1.1       itojun    507:
                    508:        if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
                    509:                perror("Warning: socket(AF_INET6)");
                    510:                return;
                    511:        }
                    512:
1.20      deraadt   513:        strlcpy(ifr.ifr_name, ifname, sizeof ifr.ifr_name);
1.1       itojun    514:        printf("ip6 on %s:\n", ifr.ifr_name);
                    515:
1.32      jaredy    516:        if (ioctl(s, SIOCGIFSTAT_IN6, &ifr) < 0) {
1.1       itojun    517:                perror("Warning: ioctl(SIOCGIFSTAT_IN6)");
                    518:                goto end;
                    519:        }
                    520:
1.14      itojun    521:        p(ifs6_in_receive, "\t%llu total input datagram%s\n");
                    522:        p(ifs6_in_hdrerr, "\t%llu datagram%s with invalid header received\n");
                    523:        p(ifs6_in_toobig, "\t%llu datagram%s exceeded MTU received\n");
                    524:        p(ifs6_in_noroute, "\t%llu datagram%s with no route received\n");
                    525:        p(ifs6_in_addrerr, "\t%llu datagram%s with invalid dst received\n");
                    526:        p(ifs6_in_truncated, "\t%llu truncated datagram%s received\n");
                    527:        p(ifs6_in_protounknown, "\t%llu datagram%s with unknown proto received\n");
                    528:        p(ifs6_in_discard, "\t%llu input datagram%s discarded\n");
1.1       itojun    529:        p(ifs6_in_deliver,
1.20      deraadt   530:            "\t%llu datagram%s delivered to an upper layer protocol\n");
1.14      itojun    531:        p(ifs6_out_forward, "\t%llu datagram%s forwarded to this interface\n");
1.1       itojun    532:        p(ifs6_out_request,
1.20      deraadt   533:            "\t%llu datagram%s sent from an upper layer protocol\n");
1.14      itojun    534:        p(ifs6_out_discard, "\t%llu total discarded output datagram%s\n");
                    535:        p(ifs6_out_fragok, "\t%llu output datagram%s fragmented\n");
                    536:        p(ifs6_out_fragfail, "\t%llu output datagram%s failed on fragment\n");
                    537:        p(ifs6_out_fragcreat, "\t%llu output datagram%s succeeded on fragment\n");
                    538:        p(ifs6_reass_reqd, "\t%llu incoming datagram%s fragmented\n");
                    539:        p(ifs6_reass_ok, "\t%llu datagram%s reassembled\n");
                    540:        p(ifs6_reass_fail, "\t%llu datagram%s failed on reassembling\n");
                    541:        p(ifs6_in_mcast, "\t%llu multicast datagram%s received\n");
                    542:        p(ifs6_out_mcast, "\t%llu multicast datagram%s sent\n");
1.1       itojun    543:
                    544:   end:
                    545:        close(s);
                    546:
                    547: #undef p
                    548: #undef p_5
                    549: }
                    550:
                    551: static char *icmp6names[] = {
                    552:        "#0",
                    553:        "unreach",
                    554:        "packet too big",
                    555:        "time exceed",
                    556:        "parameter problem",
                    557:        "#5",
                    558:        "#6",
                    559:        "#7",
                    560:        "#8",
                    561:        "#9",
                    562:        "#10",
                    563:        "#11",
                    564:        "#12",
                    565:        "#13",
                    566:        "#14",
                    567:        "#15",
                    568:        "#16",
                    569:        "#17",
                    570:        "#18",
1.17      mickey    571:        "#19",
1.1       itojun    572:        "#20",
                    573:        "#21",
                    574:        "#22",
                    575:        "#23",
                    576:        "#24",
                    577:        "#25",
                    578:        "#26",
                    579:        "#27",
                    580:        "#28",
1.17      mickey    581:        "#29",
1.1       itojun    582:        "#30",
                    583:        "#31",
                    584:        "#32",
                    585:        "#33",
                    586:        "#34",
                    587:        "#35",
                    588:        "#36",
                    589:        "#37",
                    590:        "#38",
1.17      mickey    591:        "#39",
1.1       itojun    592:        "#40",
                    593:        "#41",
                    594:        "#42",
                    595:        "#43",
                    596:        "#44",
                    597:        "#45",
                    598:        "#46",
                    599:        "#47",
                    600:        "#48",
1.17      mickey    601:        "#49",
1.1       itojun    602:        "#50",
                    603:        "#51",
                    604:        "#52",
                    605:        "#53",
                    606:        "#54",
                    607:        "#55",
                    608:        "#56",
                    609:        "#57",
                    610:        "#58",
1.17      mickey    611:        "#59",
1.1       itojun    612:        "#60",
                    613:        "#61",
                    614:        "#62",
                    615:        "#63",
                    616:        "#64",
                    617:        "#65",
                    618:        "#66",
                    619:        "#67",
                    620:        "#68",
1.17      mickey    621:        "#69",
1.1       itojun    622:        "#70",
                    623:        "#71",
                    624:        "#72",
                    625:        "#73",
                    626:        "#74",
                    627:        "#75",
                    628:        "#76",
                    629:        "#77",
                    630:        "#78",
1.17      mickey    631:        "#79",
1.1       itojun    632:        "#80",
                    633:        "#81",
                    634:        "#82",
                    635:        "#83",
                    636:        "#84",
                    637:        "#85",
                    638:        "#86",
                    639:        "#87",
                    640:        "#88",
1.17      mickey    641:        "#89",
1.1       itojun    642:        "#80",
                    643:        "#91",
                    644:        "#92",
                    645:        "#93",
                    646:        "#94",
                    647:        "#95",
                    648:        "#96",
                    649:        "#97",
                    650:        "#98",
1.17      mickey    651:        "#99",
1.1       itojun    652:        "#100",
                    653:        "#101",
                    654:        "#102",
                    655:        "#103",
                    656:        "#104",
                    657:        "#105",
                    658:        "#106",
                    659:        "#107",
                    660:        "#108",
1.17      mickey    661:        "#109",
1.1       itojun    662:        "#110",
                    663:        "#111",
                    664:        "#112",
                    665:        "#113",
                    666:        "#114",
                    667:        "#115",
                    668:        "#116",
                    669:        "#117",
                    670:        "#118",
1.17      mickey    671:        "#119",
1.1       itojun    672:        "#120",
                    673:        "#121",
                    674:        "#122",
                    675:        "#123",
                    676:        "#124",
                    677:        "#125",
                    678:        "#126",
                    679:        "#127",
                    680:        "echo",
1.17      mickey    681:        "echo reply",
1.1       itojun    682:        "multicast listener query",
                    683:        "multicast listener report",
                    684:        "multicast listener done",
                    685:        "router solicitation",
1.15      itojun    686:        "router advertisement",
1.1       itojun    687:        "neighbor solicitation",
1.15      itojun    688:        "neighbor advertisement",
1.1       itojun    689:        "redirect",
                    690:        "router renumbering",
                    691:        "node information request",
                    692:        "node information reply",
                    693:        "#141",
                    694:        "#142",
                    695:        "#143",
                    696:        "#144",
                    697:        "#145",
                    698:        "#146",
                    699:        "#147",
                    700:        "#148",
1.17      mickey    701:        "#149",
1.1       itojun    702:        "#150",
                    703:        "#151",
                    704:        "#152",
                    705:        "#153",
                    706:        "#154",
                    707:        "#155",
                    708:        "#156",
                    709:        "#157",
                    710:        "#158",
1.17      mickey    711:        "#159",
1.1       itojun    712:        "#160",
                    713:        "#161",
                    714:        "#162",
                    715:        "#163",
                    716:        "#164",
                    717:        "#165",
                    718:        "#166",
                    719:        "#167",
                    720:        "#168",
1.17      mickey    721:        "#169",
1.1       itojun    722:        "#170",
                    723:        "#171",
                    724:        "#172",
                    725:        "#173",
                    726:        "#174",
                    727:        "#175",
                    728:        "#176",
                    729:        "#177",
                    730:        "#178",
1.17      mickey    731:        "#179",
1.1       itojun    732:        "#180",
                    733:        "#181",
                    734:        "#182",
                    735:        "#183",
                    736:        "#184",
                    737:        "#185",
                    738:        "#186",
                    739:        "#187",
                    740:        "#188",
1.17      mickey    741:        "#189",
1.1       itojun    742:        "#180",
                    743:        "#191",
                    744:        "#192",
                    745:        "#193",
                    746:        "#194",
                    747:        "#195",
                    748:        "#196",
                    749:        "#197",
                    750:        "#198",
1.17      mickey    751:        "#199",
1.1       itojun    752:        "#200",
                    753:        "#201",
                    754:        "#202",
                    755:        "#203",
                    756:        "#204",
                    757:        "#205",
                    758:        "#206",
                    759:        "#207",
                    760:        "#208",
1.17      mickey    761:        "#209",
1.1       itojun    762:        "#210",
                    763:        "#211",
                    764:        "#212",
                    765:        "#213",
                    766:        "#214",
                    767:        "#215",
                    768:        "#216",
                    769:        "#217",
                    770:        "#218",
1.17      mickey    771:        "#219",
1.1       itojun    772:        "#220",
                    773:        "#221",
                    774:        "#222",
                    775:        "#223",
                    776:        "#224",
                    777:        "#225",
                    778:        "#226",
                    779:        "#227",
                    780:        "#228",
1.17      mickey    781:        "#229",
1.1       itojun    782:        "#230",
                    783:        "#231",
                    784:        "#232",
                    785:        "#233",
                    786:        "#234",
                    787:        "#235",
                    788:        "#236",
                    789:        "#237",
                    790:        "#238",
1.17      mickey    791:        "#239",
1.1       itojun    792:        "#240",
                    793:        "#241",
                    794:        "#242",
                    795:        "#243",
                    796:        "#244",
                    797:        "#245",
                    798:        "#246",
                    799:        "#247",
                    800:        "#248",
1.17      mickey    801:        "#249",
1.1       itojun    802:        "#250",
                    803:        "#251",
                    804:        "#252",
                    805:        "#253",
                    806:        "#254",
                    807:        "#255",
                    808: };
                    809:
                    810: /*
                    811:  * Dump ICMPv6 statistics.
                    812:  */
                    813: void
1.35      deraadt   814: icmp6_stats(char *name)
1.1       itojun    815: {
                    816:        struct icmp6stat icmp6stat;
1.39      tedu      817:        int i, first;
1.45      guenther  818:        int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_STATS };
1.35      deraadt   819:        size_t len = sizeof(icmp6stat);
1.1       itojun    820:
1.35      deraadt   821:        if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
                    822:            &icmp6stat, &len, NULL, 0) == -1) {
                    823:                if (errno != ENOPROTOOPT)
1.44      guenther  824:                        warn("%s", name);
1.1       itojun    825:                return;
1.35      deraadt   826:        }
                    827:
1.1       itojun    828:        printf("%s:\n", name);
                    829: #define        p(f, m) if (icmp6stat.f || sflag <= 1) \
1.20      deraadt   830:        printf(m, (unsigned long long)icmp6stat.f, plural(icmp6stat.f))
1.8       itojun    831: #define p_5(f, m) if (icmp6stat.f || sflag <= 1) \
1.20      deraadt   832:        printf(m, (unsigned long long)icmp6stat.f)
1.1       itojun    833:
1.14      itojun    834:        p(icp6s_error, "\t%llu call%s to icmp6_error\n");
1.1       itojun    835:        p(icp6s_canterror,
1.14      itojun    836:            "\t%llu error%s not generated because old message was icmp6 or so\n");
1.7       itojun    837:        p(icp6s_toofreq,
1.14      itojun    838:            "\t%llu error%s not generated because of rate limitation\n");
1.39      tedu      839:        for (first = 1, i = 0; i < 256; i++)
1.1       itojun    840:                if (icmp6stat.icp6s_outhist[i] != 0) {
1.39      tedu      841:                        if (first) {
                    842:                                printf("\tOutput packet histogram:\n");
                    843:                                first = 0;
                    844:                        }
1.14      itojun    845:                        printf("\t\t%s: %llu\n", icmp6names[i],
1.25      deraadt   846:                            (unsigned long long)icmp6stat.icp6s_outhist[i]);
1.1       itojun    847:                }
1.14      itojun    848:        p(icp6s_badcode, "\t%llu message%s with bad code fields\n");
                    849:        p(icp6s_tooshort, "\t%llu message%s < minimum length\n");
                    850:        p(icp6s_checksum, "\t%llu bad checksum%s\n");
                    851:        p(icp6s_badlen, "\t%llu message%s with bad length\n");
1.39      tedu      852:        for (first = 1, i = 0; i < ICMP6_MAXTYPE; i++)
1.1       itojun    853:                if (icmp6stat.icp6s_inhist[i] != 0) {
1.39      tedu      854:                        if (first) {
                    855:                                printf("\tInput packet histogram:\n");
                    856:                                first = 0;
                    857:                        }
1.14      itojun    858:                        printf("\t\t%s: %llu\n", icmp6names[i],
1.25      deraadt   859:                            (unsigned long long)icmp6stat.icp6s_inhist[i]);
1.1       itojun    860:                }
1.39      tedu      861:        printf("\tHistogram of error messages to be generated:\n");
1.14      itojun    862:        p_5(icp6s_odst_unreach_noroute, "\t\t%llu no route\n");
                    863:        p_5(icp6s_odst_unreach_admin, "\t\t%llu administratively prohibited\n");
                    864:        p_5(icp6s_odst_unreach_beyondscope, "\t\t%llu beyond scope\n");
                    865:        p_5(icp6s_odst_unreach_addr, "\t\t%llu address unreachable\n");
                    866:        p_5(icp6s_odst_unreach_noport, "\t\t%llu port unreachable\n");
                    867:        p_5(icp6s_opacket_too_big, "\t\t%llu packet too big\n");
                    868:        p_5(icp6s_otime_exceed_transit, "\t\t%llu time exceed transit\n");
                    869:        p_5(icp6s_otime_exceed_reassembly, "\t\t%llu time exceed reassembly\n");
                    870:        p_5(icp6s_oparamprob_header, "\t\t%llu erroneous header field\n");
                    871:        p_5(icp6s_oparamprob_nextheader, "\t\t%llu unrecognized next header\n");
                    872:        p_5(icp6s_oparamprob_option, "\t\t%llu unrecognized option\n");
                    873:        p_5(icp6s_oredirect, "\t\t%llu redirect\n");
                    874:        p_5(icp6s_ounknown, "\t\t%llu unknown\n");
                    875:
                    876:        p(icp6s_reflect, "\t%llu message response%s generated\n");
                    877:        p(icp6s_nd_toomanyopt, "\t%llu message%s with too many ND options\n");
                    878:        p(icp6s_nd_badopt, "\t%llu message%s with bad ND options\n");
                    879:        p(icp6s_badns, "\t%llu bad neighbor solicitation message%s\n");
                    880:        p(icp6s_badna, "\t%llu bad neighbor advertisement message%s\n");
                    881:        p(icp6s_badrs, "\t%llu bad router solicitation message%s\n");
                    882:        p(icp6s_badra, "\t%llu bad router advertisement message%s\n");
                    883:        p(icp6s_badredirect, "\t%llu bad redirect message%s\n");
1.12      itojun    884:        p(icp6s_pmtuchg, "\t%llu path MTU change%s\n");
1.14      itojun    885: #undef p
1.8       itojun    886: #undef p_5
1.1       itojun    887: }
                    888:
                    889: /*
                    890:  * Dump ICMPv6 per-interface statistics based on RFC 2466.
                    891:  */
                    892: void
1.25      deraadt   893: icmp6_ifstats(char *ifname)
1.1       itojun    894: {
                    895:        struct in6_ifreq ifr;
                    896:        int s;
1.20      deraadt   897:
1.1       itojun    898: #define        p(f, m) if (ifr.ifr_ifru.ifru_icmp6stat.f || sflag <= 1) \
1.20      deraadt   899:        printf(m, (unsigned long long)ifr.ifr_ifru.ifru_icmp6stat.f, \
                    900:            plural(ifr.ifr_ifru.ifru_icmp6stat.f))
1.1       itojun    901:
                    902:        if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
                    903:                perror("Warning: socket(AF_INET6)");
                    904:                return;
                    905:        }
                    906:
1.20      deraadt   907:        strlcpy(ifr.ifr_name, ifname, sizeof ifr.ifr_name);
1.1       itojun    908:        printf("icmp6 on %s:\n", ifr.ifr_name);
                    909:
1.32      jaredy    910:        if (ioctl(s, SIOCGIFSTAT_ICMP6, &ifr) < 0) {
1.1       itojun    911:                perror("Warning: ioctl(SIOCGIFSTAT_ICMP6)");
                    912:                goto end;
                    913:        }
                    914:
1.14      itojun    915:        p(ifs6_in_msg, "\t%llu total input message%s\n");
1.17      mickey    916:        p(ifs6_in_error, "\t%llu total input error message%s\n");
1.14      itojun    917:        p(ifs6_in_dstunreach, "\t%llu input destination unreachable error%s\n");
                    918:        p(ifs6_in_adminprohib, "\t%llu input administratively prohibited error%s\n");
                    919:        p(ifs6_in_timeexceed, "\t%llu input time exceeded error%s\n");
                    920:        p(ifs6_in_paramprob, "\t%llu input parameter problem error%s\n");
                    921:        p(ifs6_in_pkttoobig, "\t%llu input packet too big error%s\n");
                    922:        p(ifs6_in_echo, "\t%llu input echo request%s\n");
                    923:        p(ifs6_in_echoreply, "\t%llu input echo reply%s\n");
                    924:        p(ifs6_in_routersolicit, "\t%llu input router solicitation%s\n");
                    925:        p(ifs6_in_routeradvert, "\t%llu input router advertisement%s\n");
                    926:        p(ifs6_in_neighborsolicit, "\t%llu input neighbor solicitation%s\n");
                    927:        p(ifs6_in_neighboradvert, "\t%llu input neighbor advertisement%s\n");
                    928:        p(ifs6_in_redirect, "\t%llu input redirect%s\n");
                    929:        p(ifs6_in_mldquery, "\t%llu input MLD query%s\n");
                    930:        p(ifs6_in_mldreport, "\t%llu input MLD report%s\n");
                    931:        p(ifs6_in_mlddone, "\t%llu input MLD done%s\n");
                    932:
                    933:        p(ifs6_out_msg, "\t%llu total output message%s\n");
                    934:        p(ifs6_out_error, "\t%llu total output error message%s\n");
                    935:        p(ifs6_out_dstunreach, "\t%llu output destination unreachable error%s\n");
                    936:        p(ifs6_out_adminprohib, "\t%llu output administratively prohibited error%s\n");
                    937:        p(ifs6_out_timeexceed, "\t%llu output time exceeded error%s\n");
                    938:        p(ifs6_out_paramprob, "\t%llu output parameter problem error%s\n");
                    939:        p(ifs6_out_pkttoobig, "\t%llu output packet too big error%s\n");
                    940:        p(ifs6_out_echo, "\t%llu output echo request%s\n");
                    941:        p(ifs6_out_echoreply, "\t%llu output echo reply%s\n");
                    942:        p(ifs6_out_routersolicit, "\t%llu output router solicitation%s\n");
                    943:        p(ifs6_out_routeradvert, "\t%llu output router advertisement%s\n");
                    944:        p(ifs6_out_neighborsolicit, "\t%llu output neighbor solicitation%s\n");
                    945:        p(ifs6_out_neighboradvert, "\t%llu output neighbor advertisement%s\n");
                    946:        p(ifs6_out_redirect, "\t%llu output redirect%s\n");
                    947:        p(ifs6_out_mldquery, "\t%llu output MLD query%s\n");
                    948:        p(ifs6_out_mldreport, "\t%llu output MLD report%s\n");
                    949:        p(ifs6_out_mlddone, "\t%llu output MLD done%s\n");
1.1       itojun    950:
                    951:   end:
                    952:        close(s);
                    953: #undef p
                    954: }
                    955:
                    956: /*
                    957:  * Dump PIM statistics structure.
                    958:  */
                    959: void
1.35      deraadt   960: pim6_stats(char *name)
1.1       itojun    961: {
                    962:        struct pim6stat pim6stat;
1.45      guenther  963:        int mib[] = { CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS };
1.35      deraadt   964:        size_t len = sizeof(pim6stat);
1.1       itojun    965:
1.35      deraadt   966:        if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
                    967:            &pim6stat, &len, NULL, 0) == -1) {
                    968:                if (errno != ENOPROTOOPT)
1.44      guenther  969:                        warn("%s", name);
1.1       itojun    970:                return;
1.35      deraadt   971:        }
                    972:
1.1       itojun    973:        printf("%s:\n", name);
                    974: #define        p(f, m) if (pim6stat.f || sflag <= 1) \
1.20      deraadt   975:        printf(m, (unsigned long long)pim6stat.f, plural(pim6stat.f))
                    976:
1.14      itojun    977:        p(pim6s_rcv_total, "\t%llu message%s received\n");
                    978:        p(pim6s_rcv_tooshort, "\t%llu message%s received with too few bytes\n");
                    979:        p(pim6s_rcv_badsum, "\t%llu message%s received with bad checksum\n");
                    980:        p(pim6s_rcv_badversion, "\t%llu message%s received with bad version\n");
                    981:        p(pim6s_rcv_registers, "\t%llu register%s received\n");
                    982:        p(pim6s_rcv_badregisters, "\t%llu bad register%s received\n");
                    983:        p(pim6s_snd_registers, "\t%llu register%s sent\n");
1.21      itojun    984: #undef p
                    985: }
                    986:
                    987: /*
                    988:  * Dump raw ip6 statistics structure.
                    989:  */
                    990: void
1.35      deraadt   991: rip6_stats(char *name)
1.21      itojun    992: {
                    993:        struct rip6stat rip6stat;
1.34      henning   994:        u_int64_t delivered;
1.45      guenther  995:        int mib[] = { CTL_NET, PF_INET6, IPPROTO_RAW, RIPV6CTL_STATS };
1.35      deraadt   996:        size_t len = sizeof(rip6stat);
1.21      itojun    997:
1.35      deraadt   998:        if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
                    999:            &rip6stat, &len, NULL, 0) == -1) {
                   1000:                if (errno != ENOPROTOOPT)
1.44      guenther 1001:                        warn("%s", name);
1.21      itojun   1002:                return;
1.35      deraadt  1003:        }
                   1004:
1.21      itojun   1005:        printf("%s:\n", name);
                   1006:
                   1007: #define        p(f, m) if (rip6stat.f || sflag <= 1) \
                   1008:     printf(m, (unsigned long long)rip6stat.f, plural(rip6stat.f))
                   1009:        p(rip6s_ipackets, "\t%llu message%s received\n");
1.24      itojun   1010:        p(rip6s_isum, "\t%llu checksum calculation%s on inbound\n");
1.21      itojun   1011:        p(rip6s_badsum, "\t%llu message%s with bad checksum\n");
                   1012:        p(rip6s_nosock, "\t%llu message%s dropped due to no socket\n");
                   1013:        p(rip6s_nosockmcast,
                   1014:            "\t%llu multicast message%s dropped due to no socket\n");
                   1015:        p(rip6s_fullsock,
                   1016:            "\t%llu message%s dropped due to full socket buffers\n");
                   1017:        delivered = rip6stat.rip6s_ipackets -
                   1018:                    rip6stat.rip6s_badsum -
                   1019:                    rip6stat.rip6s_nosock -
                   1020:                    rip6stat.rip6s_nosockmcast -
                   1021:                    rip6stat.rip6s_fullsock;
                   1022:        if (delivered || sflag <= 1)
                   1023:                printf("\t%llu delivered\n", (unsigned long long)delivered);
                   1024:        p(rip6s_opackets, "\t%llu datagram%s output\n");
1.1       itojun   1025: #undef p
1.40      michele  1026: }
                   1027:
                   1028: /*
                   1029:  * Dump divert6 statistics structure.
                   1030:  */
                   1031: void
                   1032: div6_stats(char *name)
                   1033: {
                   1034:        struct div6stat div6stat;
1.45      guenther 1035:        int mib[] = { CTL_NET, PF_INET6, IPPROTO_DIVERT, DIVERT6CTL_STATS };
1.40      michele  1036:        size_t len = sizeof(div6stat);
                   1037:
                   1038:        if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
                   1039:            &div6stat, &len, NULL, 0) == -1) {
                   1040:                if (errno != ENOPROTOOPT)
1.44      guenther 1041:                        warn("%s", name);
1.40      michele  1042:                return;
                   1043:        }
                   1044:
                   1045:        printf("%s:\n", name);
                   1046: #define p(f, m) if (div6stat.f || sflag <= 1) \
                   1047:     printf(m, div6stat.f, plural(div6stat.f))
                   1048: #define p1(f, m) if (div6stat.f || sflag <= 1) \
                   1049:     printf(m, div6stat.f)
                   1050:        p(divs_ipackets, "\t%lu total packet%s received\n");
                   1051:        p1(divs_noport, "\t%lu dropped due to no socket\n");
                   1052:        p1(divs_fullsock, "\t%lu dropped due to full socket buffers\n");
                   1053:        p(divs_opackets, "\t%lu packet%s output\n");
                   1054:        p1(divs_errors, "\t%lu errors\n");
                   1055: #undef p
                   1056: #undef p1
1.1       itojun   1057: }
                   1058:
                   1059: /*
                   1060:  * Pretty print an Internet address (net address + port).
                   1061:  * If the nflag was specified, use numbers instead of names.
                   1062:  */
                   1063:
                   1064: void
1.25      deraadt  1065: inet6print(struct in6_addr *in6, int port, char *proto)
1.1       itojun   1066: {
1.25      deraadt  1067:
                   1068: #define GETSERVBYPORT6(port, proto, ret) do { \
                   1069:        if (strcmp((proto), "tcp6") == 0) \
                   1070:                (ret) = getservbyport((int)(port), "tcp"); \
                   1071:        else if (strcmp((proto), "udp6") == 0) \
                   1072:                (ret) = getservbyport((int)(port), "udp"); \
                   1073:        else \
                   1074:                (ret) = getservbyport((int)(port), (proto)); \
                   1075:        } while (0)
                   1076:
1.1       itojun   1077:        struct servent *sp = 0;
                   1078:        char line[80], *cp;
                   1079:        int width;
1.26      deraadt  1080:        int len = sizeof line;
1.1       itojun   1081:
1.14      itojun   1082:        width = Aflag ? 12 : 16;
                   1083:        if (vflag && width < strlen(inet6name(in6)))
                   1084:                width = strlen(inet6name(in6));
1.26      deraadt  1085:        snprintf(line, len, "%.*s.", width, inet6name(in6));
                   1086:        len -= strlen(line);
                   1087:        if (len <= 0)
                   1088:                goto bail;
                   1089:
1.27      sturm    1090:        cp = strchr(line, '\0');
1.1       itojun   1091:        if (!nflag && port)
                   1092:                GETSERVBYPORT6(port, proto, sp);
                   1093:        if (sp || port == 0)
1.26      deraadt  1094:                snprintf(cp, len, "%.8s", sp ? sp->s_name : "*");
1.1       itojun   1095:        else
1.26      deraadt  1096:                snprintf(cp, len, "%d", ntohs((u_short)port));
1.1       itojun   1097:        width = Aflag ? 18 : 22;
1.14      itojun   1098:        if (vflag && width < strlen(line))
                   1099:                width = strlen(line);
1.26      deraadt  1100: bail:
1.1       itojun   1101:        printf(" %-*.*s", width, width, line);
                   1102: }
                   1103:
                   1104: /*
                   1105:  * Construct an Internet address representation.
                   1106:  * If the nflag has been supplied, give
                   1107:  * numeric value, otherwise try for symbolic name.
                   1108:  */
                   1109:
                   1110: char *
1.25      deraadt  1111: inet6name(struct in6_addr *in6p)
1.1       itojun   1112: {
1.16      mpech    1113:        char *cp;
1.14      itojun   1114:        static char line[NI_MAXHOST];
1.1       itojun   1115:        struct hostent *hp;
1.19      mpech    1116:        static char domain[MAXHOSTNAMELEN];
1.1       itojun   1117:        static int first = 1;
1.14      itojun   1118:        char hbuf[NI_MAXHOST];
1.1       itojun   1119:        struct sockaddr_in6 sin6;
                   1120:        const int niflag = NI_NUMERICHOST;
                   1121:
                   1122:        if (first && !nflag) {
                   1123:                first = 0;
1.19      mpech    1124:                if (gethostname(domain, sizeof(domain)) == 0 &&
1.22      deraadt  1125:                    (cp = strchr(domain, '.')))
1.20      deraadt  1126:                        (void) strlcpy(domain, cp + 1, sizeof domain);
1.1       itojun   1127:                else
1.20      deraadt  1128:                        domain[0] = '\0';
1.1       itojun   1129:        }
                   1130:        cp = 0;
                   1131:        if (!nflag && !IN6_IS_ADDR_UNSPECIFIED(in6p)) {
                   1132:                hp = gethostbyaddr((char *)in6p, sizeof(*in6p), AF_INET6);
                   1133:                if (hp) {
1.22      deraadt  1134:                        if ((cp = strchr(hp->h_name, '.')) &&
1.1       itojun   1135:                            !strcmp(cp + 1, domain))
                   1136:                                *cp = 0;
                   1137:                        cp = hp->h_name;
                   1138:                }
                   1139:        }
                   1140:        if (IN6_IS_ADDR_UNSPECIFIED(in6p))
1.14      itojun   1141:                strlcpy(line, "*", sizeof(line));
1.1       itojun   1142:        else if (cp)
1.14      itojun   1143:                strlcpy(line, cp, sizeof(line));
1.1       itojun   1144:        else {
                   1145:                memset(&sin6, 0, sizeof(sin6));
                   1146:                sin6.sin6_len = sizeof(sin6);
                   1147:                sin6.sin6_family = AF_INET6;
                   1148:                sin6.sin6_addr = *in6p;
1.28      itojun   1149: #ifdef __KAME__
1.30      itojun   1150:                if (IN6_IS_ADDR_LINKLOCAL(in6p) ||
1.33      itojun   1151:                    IN6_IS_ADDR_MC_LINKLOCAL(in6p) ||
                   1152:                    IN6_IS_ADDR_MC_INTFACELOCAL(in6p)) {
1.1       itojun   1153:                        sin6.sin6_scope_id =
1.20      deraadt  1154:                            ntohs(*(u_int16_t *)&in6p->s6_addr[2]);
1.1       itojun   1155:                        sin6.sin6_addr.s6_addr[2] = 0;
                   1156:                        sin6.sin6_addr.s6_addr[3] = 0;
                   1157:                }
                   1158: #endif
                   1159:                if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
1.20      deraadt  1160:                    hbuf, sizeof(hbuf), NULL, 0, niflag) != 0)
                   1161:                        strlcpy(hbuf, "?", sizeof hbuf);
1.14      itojun   1162:                strlcpy(line, hbuf, sizeof(line));
1.1       itojun   1163:        }
                   1164:        return (line);
                   1165: }