netstat.tproj/route.c

   1 /*
   2  * Copyright (c) 2008-2009 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  * Copyright (c) 1983, 1988, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  */
  60
  61 #include <stdint.h>
  62 #include <sys/param.h>
  63 #include <sys/socket.h>
  64 #include <sys/time.h>
  65
  66 #include <net/if.h>
  67 #include <net/if_var.h>
  68 #include <net/if_dl.h>
  69 #include <net/if_types.h>
  70 #include <net/route.h>
  71 #include <net/radix.h>
  72
  73 #include <netinet/in.h>
  74
  75 #include <sys/sysctl.h>
  76
  77 #include <arpa/inet.h>
  78 #include <netdb.h>
  79 #include <stdio.h>
  80 #include <stdlib.h>
  81 #include <string.h>
  82 #include <unistd.h>
  83 #include <err.h>
  84 #include <time.h>
  85 #include "netstat.h"
  86
  87 /* alignment constraint for routing socket */
  88 #define ROUNDUP(a) \
  89        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t))
  90 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
  91
  92 /*
  93  * Definitions for showing gateway flags.
  94  */
  95 struct bits {
  96         uint32_t        b_mask;
  97         char    b_val;
  98 } bits[] = {
  99         { RTF_UP,       'U' },
 100         { RTF_GATEWAY,  'G' },
 101         { RTF_HOST,     'H' },
 102         { RTF_REJECT,   'R' },
 103         { RTF_DYNAMIC,  'D' },
 104         { RTF_MODIFIED, 'M' },
 105         { RTF_MULTICAST,'m' },
 106         { RTF_DONE,     'd' }, /* Completed -- for routing messages only */
 107         { RTF_CLONING,  'C' },
 108         { RTF_XRESOLVE, 'X' },
 109         { RTF_LLINFO,   'L' },
 110         { RTF_STATIC,   'S' },
 111         { RTF_PROTO1,   '1' },
 112         { RTF_PROTO2,   '2' },
 113         { RTF_WASCLONED,'W' },
 114         { RTF_PRCLONING,'c' },
 115         { RTF_PROTO3,   '3' },
 116         { RTF_BLACKHOLE,'B' },
 117         { RTF_BROADCAST,'b' },
 118         { RTF_IFSCOPE,  'I' },
 119 #ifdef RTF_IFREF
 120         { RTF_IFREF,    'i' },
 121 #endif /* RTF_IFREF */
 122         { 0 }
 123 };
 124
 125 typedef union {
 126         uint32_t dummy;         /* Helps align structure. */
 127         struct  sockaddr u_sa;
 128         u_short u_data[128];
 129 } sa_u;
 130
 131 static void ntreestuff __P((void));
 132 static void np_rtentry __P((struct rt_msghdr2 *));
 133 static void p_sockaddr __P((struct sockaddr *, struct sockaddr *, int, int));
 134 static void p_flags __P((int, char *));
 135 static uint32_t forgemask __P((uint32_t));
 136 static void domask __P((char *, uint32_t, uint32_t));
 137
 138 /*
 139  * Print routing tables.
 140  */
 141 void
 142 routepr(uint32_t rtree)
 143 {
 144         printf("Routing tables\n");
 145
 146         if (dflag == 0) {
 147                 ntreestuff();
 148         } else {
 149                 if (rtree == 0) {
 150                         printf("rt_tables: symbol not in namelist\n");
 151                         return;
 152                 }
 153                                 }
 154                         }
 155
 156 /*
 157  * Print address family header before a section of the routing table.
 158  */
 159 void
 160 pr_family(int af)
 161 {
 162         char *afname;
 163
 164         switch (af) {
 165         case AF_INET:
 166                 afname = "Internet";
 167                 break;
 168 #ifdef INET6
 169         case AF_INET6:
 170                 afname = "Internet6";
 171                 break;
 172 #endif /*INET6*/
 173         case AF_IPX:
 174                 afname = "IPX";
 175                 break;
 176         default:
 177                 afname = NULL;
 178                 break;
 179         }
 180         if (afname)
 181                 printf("\n%s:\n", afname);
 182         else
 183                 printf("\nProtocol Family %d:\n", af);
 184 }
 185
 186 /* column widths; each followed by one space */
 187 #ifndef INET6
 188 #define WID_DST(af)     18      /* width of destination column */
 189 #define WID_GW(af)      18      /* width of gateway column */
 190 #define WID_IF(af)      7       /* width of netif column */
 191 #else
 192 #define WID_DST(af) \
 193         ((af) == AF_INET6 ? (lflag ? 39 : (nflag ? 39: 18)) : 18)
 194 #define WID_GW(af) \
 195         ((af) == AF_INET6 ? (lflag ? 31 : (nflag ? 31 : 18)) : 18)
 196 #define WID_IF(af)      ((af) == AF_INET6 ? 8 : 7)
 197 #endif /*INET6*/
 198
 199 /*
 200  * Print header for routing table columns.
 201  */
 202 void
 203 pr_rthdr(int af)
 204 {
 205
 206         if (Aflag)
 207                 printf("%-8.8s ","Address");
 208         if (af == AF_INET || lflag)
 209                 if (lflag)
 210                         printf("%-*.*s %-*.*s %-10.10s %6.6s %8.8s %6.6s %*.*s %6s\n",
 211                                 WID_DST(af), WID_DST(af), "Destination",
 212                                 WID_GW(af), WID_GW(af), "Gateway",
 213                                 "Flags", "Refs", "Use", "Mtu",
 214                                 WID_IF(af), WID_IF(af), "Netif", "Expire");
 215                 else
 216                         printf("%-*.*s %-*.*s %-10.10s %6.6s %8.8s %*.*s %6s\n",
 217                                 WID_DST(af), WID_DST(af), "Destination",
 218                                 WID_GW(af), WID_GW(af), "Gateway",
 219                                 "Flags", "Refs", "Use",
 220                                 WID_IF(af), WID_IF(af), "Netif", "Expire");
 221         else
 222                 printf("%-*.*s %-*.*s %-10.10s %8.8s %6s\n",
 223                         WID_DST(af), WID_DST(af), "Destination",
 224                         WID_GW(af), WID_GW(af), "Gateway",
 225                         "Flags", "Netif", "Expire");
 226 }
 227
 228 static void
 229 ntreestuff(void)
 230 {
 231         size_t needed;
 232         int mib[6];
 233         char *buf, *next, *lim;
 234         struct rt_msghdr2 *rtm;
 235
 236         mib[0] = CTL_NET;
 237         mib[1] = PF_ROUTE;
 238         mib[2] = 0;
 239         mib[3] = 0;
 240         mib[4] = NET_RT_DUMP2;
 241         mib[5] = 0;
 242         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
 243                 err(1, "sysctl: net.route.0.0.dump estimate");
 244         }
 245
 246         if ((buf = malloc(needed)) == 0) {
 247                 err(2, "malloc(%lu)", (unsigned long)needed);
 248         }
 249         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 250                 err(1, "sysctl: net.route.0.0.dump");
 251         }
 252         lim  = buf + needed;
 253         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 254                 rtm = (struct rt_msghdr2 *)next;
 255                 np_rtentry(rtm);
 256         }
 257 }
 258
 259 static void
 260 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
 261 {
 262         int i;
 263
 264         for (i = 0; i < RTAX_MAX; i++) {
 265                 if (addrs & (1 << i)) {
 266                         rti_info[i] = sa;
 267                                                 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 268                 } else {
 269                         rti_info[i] = NULL;
 270         }
 271 }
 272 }
 273
 274 static void
 275 np_rtentry(struct rt_msghdr2 *rtm)
 276 {
 277         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 278         struct sockaddr *rti_info[RTAX_MAX];
 279         static int old_fam;
 280         int fam = 0;
 281         u_short lastindex = 0xffff;
 282         static char ifname[IFNAMSIZ + 1];
 283         sa_u addr, mask;
 284
 285         /*
 286          * Don't print protocol-cloned routes unless -a.
 287          */
 288         if ((rtm->rtm_flags & RTF_WASCLONED) &&
 289             (rtm->rtm_parentflags & RTF_PRCLONING) &&
 290             !aflag) {
 291                         return;
 292         }
 293
 294         fam = sa->sa_family;
 295         if (af != AF_UNSPEC && af != fam)
 296                 return;
 297         if (fam != old_fam) {
 298                 pr_family(fam);
 299                 pr_rthdr(fam);
 300                 old_fam = fam;
 301         }
 302         get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
 303         bzero(&addr, sizeof(addr));
 304         if ((rtm->rtm_addrs & RTA_DST))
 305                 bcopy(rti_info[RTAX_DST], &addr, rti_info[RTAX_DST]->sa_len);
 306         bzero(&mask, sizeof(mask));
 307         if ((rtm->rtm_addrs & RTA_NETMASK))
 308                 bcopy(rti_info[RTAX_NETMASK], &mask, rti_info[RTAX_NETMASK]->sa_len);
 309         p_sockaddr(&addr.u_sa, &mask.u_sa, rtm->rtm_flags,
 310             WID_DST(addr.u_sa.sa_family));
 311
 312         p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
 313             WID_GW(addr.u_sa.sa_family));
 314
 315         p_flags(rtm->rtm_flags, "%-10.10s ");
 316
 317         if (addr.u_sa.sa_family == AF_INET || lflag) {
 318                 printf("%6u %8u ", rtm->rtm_refcnt, (unsigned int)rtm->rtm_use);
 319                 if (lflag) {
 320                         if (rtm->rtm_rmx.rmx_mtu != 0)
 321                                 printf("%6u ", rtm->rtm_rmx.rmx_mtu);
 322                         else
 323                                 printf("%6s ", "");
 324                 }
 325         }
 326         if (rtm->rtm_index != lastindex) {
 327                 if_indextoname(rtm->rtm_index, ifname);
 328                 lastindex = rtm->rtm_index;
 329         }
 330         printf("%*.*s", WID_IF(addr.u_sa.sa_family),
 331                 WID_IF(addr.u_sa.sa_family), ifname);
 332
 333         if (rtm->rtm_rmx.rmx_expire) {
 334                 time_t expire_time;
 335
 336                 if ((expire_time =
 337                         rtm->rtm_rmx.rmx_expire - time((time_t *)0)) > 0)
 338                         printf(" %6d", (int)expire_time);
 339         }
 340         putchar('\n');
 341 }
 342
 343 static void
 344 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
 345 {
 346         char workbuf[128], *cplim;
 347         char *cp = workbuf;
 348
 349         switch(sa->sa_family) {
 350         case AF_INET: {
 351                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 352
 353                 if ((sin->sin_addr.s_addr == INADDR_ANY) &&
 354                         mask &&
 355                     (ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr) == 0L || mask->sa_len == 0))
 356                                 cp = "default" ;
 357                 else if (flags & RTF_HOST)
 358                         cp = routename(sin->sin_addr.s_addr);
 359                 else if (mask)
 360                         cp = netname(sin->sin_addr.s_addr,
 361                             ntohl(((struct sockaddr_in *)mask)->
 362                             sin_addr.s_addr));
 363                 else
 364                         cp = netname(sin->sin_addr.s_addr, 0L);
 365                 break;
 366             }
 367
 368 #ifdef INET6
 369         case AF_INET6: {
 370                 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
 371                 struct in6_addr *in6 = &sa6->sin6_addr;
 372
 373                 /*
 374                  * XXX: This is a special workaround for KAME kernels.
 375                  * sin6_scope_id field of SA should be set in the future.
 376                  */
 377                 if (IN6_IS_ADDR_LINKLOCAL(in6) ||
 378                     IN6_IS_ADDR_MC_NODELOCAL(in6) ||
 379                     IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
 380                     /* XXX: override is ok? */
 381                     sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
 382                     *(u_short *)&in6->s6_addr[2] = 0;
 383                 }
 384
 385                 if (flags & RTF_HOST)
 386                     cp = routename6(sa6);
 387                 else if (mask)
 388                     cp = netname6(sa6, mask);
 389                 else
 390                     cp = netname6(sa6, NULL);
 391                 break;
 392             }
 393 #endif /*INET6*/
 394
 395         case AF_LINK: {
 396                 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
 397
 398                 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
 399                     sdl->sdl_slen == 0) {
 400                         (void) snprintf(workbuf, sizeof(workbuf), "link#%d", sdl->sdl_index);
 401                 } else {
 402                         switch (sdl->sdl_type) {
 403
 404                         case IFT_ETHER: {
 405                                 int i;
 406                                 u_char *lla = (u_char *)sdl->sdl_data +
 407                                     sdl->sdl_nlen;
 408
 409                                 cplim = "";
 410                                 for (i = 0; i < sdl->sdl_alen; i++, lla++) {
 411                                         cp += snprintf(cp, sizeof(workbuf) - (cp - workbuf), "%s%x", cplim, *lla);
 412                                         cplim = ":";
 413                                 }
 414                                 cp = workbuf;
 415                                 break;
 416                             }
 417
 418                         default:
 419                                 cp = link_ntoa(sdl);
 420                                 break;
 421                         }
 422                 }
 423                 break;
 424             }
 425
 426         default: {
 427                 u_char *s = (u_char *)sa->sa_data, *slim;
 428
 429                 slim =  sa->sa_len + (u_char *) sa;
 430                 cplim = cp + sizeof(workbuf) - 6;
 431                 cp += snprintf(cp, sizeof(workbuf) - (cp - workbuf), "(%d)", sa->sa_family);
 432                 while (s < slim && cp < cplim) {
 433                         cp += snprintf(cp, sizeof(workbuf) - (cp - workbuf), " %02x", *s++);
 434                         if (s < slim)
 435                             cp += snprintf(cp, sizeof(workbuf) - (cp - workbuf), "%02x", *s++);
 436                 }
 437                 cp = workbuf;
 438             }
 439         }
 440         if (width < 0 ) {
 441                 printf("%s ", cp);
 442         } else {
 443                 if (nflag)
 444                         printf("%-*s ", width, cp);
 445                 else
 446                         printf("%-*.*s ", width, width, cp);
 447         }
 448 }
 449
 450 static void
 451 p_flags(int f, char *format)
 452 {
 453         char name[33], *flags;
 454         struct bits *p = bits;
 455
 456         for (flags = name; p->b_mask; p++)
 457                 if (p->b_mask & f)
 458                         *flags++ = p->b_val;
 459         *flags = '\0';
 460         printf(format, name);
 461 }
 462
 463 char *
 464 routename(uint32_t in)
 465 {
 466         char *cp;
 467         static char line[MAXHOSTNAMELEN];
 468         struct hostent *hp;
 469
 470         cp = 0;
 471         if (!nflag) {
 472                 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 473                         AF_INET);
 474                 if (hp) {
 475                         cp = hp->h_name;
 476                          //### trimdomain(cp, strlen(cp));
 477                 }
 478         }
 479         if (cp) {
 480                 strncpy(line, cp, sizeof(line) - 1);
 481                 line[sizeof(line) - 1] = '\0';
 482         } else {
 483 #define C(x)    ((x) & 0xff)
 484                 in = ntohl(in);
 485                 snprintf(line, sizeof(line), "%u.%u.%u.%u",
 486                     C(in >> 24), C(in >> 16), C(in >> 8), C(in));
 487         }
 488         return (line);
 489 }
 490
 491 static uint32_t
 492 forgemask(uint32_t a)
 493 {
 494         uint32_t m;
 495
 496         if (IN_CLASSA(a))
 497                 m = IN_CLASSA_NET;
 498         else if (IN_CLASSB(a))
 499                 m = IN_CLASSB_NET;
 500         else
 501                 m = IN_CLASSC_NET;
 502         return (m);
 503 }
 504
 505 static void
 506 domask(char *dst, uint32_t addr, uint32_t mask)
 507 {
 508         int b, i;
 509
 510         if (!mask || (forgemask(addr) == mask)) {
 511                 *dst = '\0';
 512                 return;
 513         }
 514         i = 0;
 515         for (b = 0; b < 32; b++)
 516                 if (mask & (1 << b)) {
 517                         int bb;
 518
 519                         i = b;
 520                         for (bb = b+1; bb < 32; bb++)
 521                                 if (!(mask & (1 << bb))) {
 522                                         i = -1; /* noncontig */
 523                                         break;
 524                                 }
 525                         break;
 526                 }
 527         if (i == -1)
 528                 snprintf(dst, sizeof(dst), "&0x%x", mask);
 529         else
 530                 snprintf(dst, sizeof(dst), "/%d", 32-i);
 531 }
 532
 533 /*
 534  * Return the name of the network whose address is given.
 535  * The address is assumed to be that of a net or subnet, not a host.
 536  */
 537 char *
 538 netname(uint32_t in, uint32_t mask)
 539 {
 540         char *cp = 0;
 541         static char line[MAXHOSTNAMELEN];
 542         struct netent *np = 0;
 543         uint32_t net, omask, dmask;
 544         uint32_t i;
 545
 546         i = ntohl(in);
 547         dmask = forgemask(i);
 548         omask = mask;
 549         if (!nflag && i) {
 550                 net = i & dmask;
 551                 if (!(np = getnetbyaddr(i, AF_INET)) && net != i)
 552                         np = getnetbyaddr(net, AF_INET);
 553                 if (np) {
 554                         cp = np->n_name;
 555                          //### trimdomain(cp, strlen(cp));
 556                 }
 557         }
 558         if (cp)
 559                 strncpy(line, cp, sizeof(line) - 1);
 560         else {
 561                 switch (dmask) {
 562                 case IN_CLASSA_NET:
 563                         if ((i & IN_CLASSA_HOST) == 0) {
 564                                 snprintf(line, sizeof(line), "%u", C(i >> 24));
 565                                 break;
 566                         }
 567                         /* FALLTHROUGH */
 568                 case IN_CLASSB_NET:
 569                         if ((i & IN_CLASSB_HOST) == 0) {
 570                                 snprintf(line, sizeof(line), "%u.%u",
 571                                         C(i >> 24), C(i >> 16));
 572                                 break;
 573                         }
 574                         /* FALLTHROUGH */
 575                 case IN_CLASSC_NET:
 576                         if ((i & IN_CLASSC_HOST) == 0) {
 577                                 snprintf(line, sizeof(line), "%u.%u.%u",
 578                                         C(i >> 24), C(i >> 16), C(i >> 8));
 579                                 break;
 580                         }
 581                         /* FALLTHROUGH */
 582                 default:
 583                         snprintf(line, sizeof(line), "%u.%u.%u.%u",
 584                                 C(i >> 24), C(i >> 16), C(i >> 8), C(i));
 585                         break;
 586                 }
 587         }
 588         domask(line+strlen(line), i, omask);
 589         return (line);
 590 }
 591
 592 #ifdef INET6
 593 char *
 594 netname6(struct sockaddr_in6 *sa6, struct sockaddr *sam)
 595 {
 596         static char line[MAXHOSTNAMELEN];
 597         u_char *lim;
 598         int masklen, illegal = 0, flag = NI_WITHSCOPEID;
 599         struct in6_addr *mask = sam ? &((struct sockaddr_in6 *)sam)->sin6_addr : 0;
 600
 601         if (sam && sam->sa_len == 0) {
 602                 masklen = 0;
 603         } else if (mask) {
 604                 u_char *p = (u_char *)mask;
 605                 for (masklen = 0, lim = p + 16; p < lim; p++) {
 606                         switch (*p) {
 607                          case 0xff:
 608                                  masklen += 8;
 609                                  break;
 610                          case 0xfe:
 611                                  masklen += 7;
 612                                  break;
 613                          case 0xfc:
 614                                  masklen += 6;
 615                                  break;
 616                          case 0xf8:
 617                                  masklen += 5;
 618                                  break;
 619                          case 0xf0:
 620                                  masklen += 4;
 621                                  break;
 622                          case 0xe0:
 623                                  masklen += 3;
 624                                  break;
 625                          case 0xc0:
 626                                  masklen += 2;
 627                                  break;
 628                          case 0x80:
 629                                  masklen += 1;
 630                                  break;
 631                          case 0x00:
 632                                  break;
 633                          default:
 634                                  illegal ++;
 635                                  break;
 636                         }
 637                 }
 638                 if (illegal)
 639                         fprintf(stderr, "illegal prefixlen\n");
 640         } else {
 641                 masklen = 128;
 642         }
 643         if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
 644                 return("default");
 645
 646         if (nflag)
 647                 flag |= NI_NUMERICHOST;
 648         getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
 649                     NULL, 0, flag);
 650
 651         if (nflag)
 652                 snprintf(&line[strlen(line)], sizeof(line) - strlen(line), "/%d", masklen);
 653
 654         return line;
 655 }
 656
 657 char *
 658 routename6(struct sockaddr_in6 *sa6)
 659 {
 660         static char line[MAXHOSTNAMELEN];
 661         int flag = NI_WITHSCOPEID;
 662         /* use local variable for safety */
 663         struct sockaddr_in6 sa6_local = {sizeof(sa6_local), AF_INET6, };
 664
 665         sa6_local.sin6_addr = sa6->sin6_addr;
 666         sa6_local.sin6_scope_id = sa6->sin6_scope_id;
 667
 668         if (nflag)
 669                 flag |= NI_NUMERICHOST;
 670
 671         getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
 672                     line, sizeof(line), NULL, 0, flag);
 673
 674         return line;
 675 }
 676 #endif /*INET6*/
 677
 678 /*
 679  * Print routing statistics
 680  */
 681 void
 682 rt_stats(void)
 683 {
 684         struct rtstat rtstat;
 685         int rttrash;
 686         int mib[6];
 687         size_t len;
 688
 689         mib[0] = CTL_NET;
 690         mib[1] = AF_ROUTE;
 691         mib[2] = 0;
 692         mib[3] = 0;
 693         mib[4] = NET_RT_STAT;
 694         mib[5] = 0;
 695         len = sizeof(struct rtstat);
 696         if (sysctl(mib, 6, &rtstat, &len, 0, 0) == -1)
 697                 return;
 698
 699         mib[0] = CTL_NET;
 700         mib[1] = AF_ROUTE;
 701         mib[2] = 0;
 702         mib[3] = 0;
 703         mib[4] = NET_RT_TRASH;
 704         mib[5] = 0;
 705         len = sizeof(rttrash);
 706         if (sysctl(mib, 6, &rttrash, &len, 0, 0) == -1)
 707                 return;
 708
 709         printf("routing:\n");
 710
 711 #define p(f, m) if (rtstat.f || sflag <= 1) \
 712         printf(m, rtstat.f, plural(rtstat.f))
 713
 714         p(rts_badredirect, "\t%u bad routing redirect%s\n");
 715         p(rts_dynamic, "\t%u dynamically created route%s\n");
 716         p(rts_newgateway, "\t%u new gateway%s due to redirects\n");
 717         p(rts_unreach, "\t%u destination%s found unreachable\n");
 718         p(rts_wildcard, "\t%u use%s of a wildcard route\n");
 719 #undef p
 720
 721         if (rttrash || sflag <= 1)
 722                 printf("\t%u route%s not in table but not freed\n",
 723                     rttrash, plural(rttrash));
 724 }
 725
 726 void
 727 upHex(char *p0)
 728 {
 729         char *p = p0;
 730
 731         for (; *p; p++)
 732                 switch (*p) {
 733
 734                 case 'a':
 735                 case 'b':
 736                 case 'c':
 737                 case 'd':
 738                 case 'e':
 739                 case 'f':
 740                         *p += ('A' - 'a');
 741                         break;
 742                 }
 743 }