usr.bin/netstat/route.c

   1 /*
   2  * Copyright (c) 1983, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)route.c  8.6 (Berkeley) 4/28/95
  34  * $FreeBSD: src/usr.bin/netstat/route.c,v 1.41.2.14 2002/07/17 02:22:22 kbyanc Exp $
  35  */
  36
  37 #include <sys/kinfo.h>
  38 #include <sys/param.h>
  39 #include <sys/socket.h>
  40 #include <sys/time.h>
  41
  42 #include <net/ethernet.h>
  43 #include <net/if.h>
  44 #include <net/if_var.h>
  45 #include <net/if_dl.h>
  46 #include <net/if_types.h>
  47 #include <net/route.h>
  48
  49 #include <netinet/in.h>
  50 #include <netipx/ipx.h>
  51 #include <netgraph/socket/ng_socket.h>
  52
  53 #include <netproto/mpls/mpls.h>
  54
  55 #include <sys/sysctl.h>
  56
  57 #include <arpa/inet.h>
  58 #include <libutil.h>
  59 #include <netdb.h>
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #include <unistd.h>
  64 #include <err.h>
  65 #include <time.h>
  66 #include <kinfo.h>
  67 #include "netstat.h"
  68
  69 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
  70
  71
  72 /* alignment constraint for routing socket */
  73 #define ROUNDUP(a) \
  74        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
  75 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
  76
  77 /*
  78  * Definitions for showing gateway flags.
  79  */
  80 struct bits {
  81         u_long  b_mask;
  82         char    b_val;
  83 } bits[] = {
  84         { RTF_UP,       'U' },
  85         { RTF_GATEWAY,  'G' },
  86         { RTF_HOST,     'H' },
  87         { RTF_REJECT,   'R' },
  88         { RTF_DYNAMIC,  'D' },
  89         { RTF_MODIFIED, 'M' },
  90         { RTF_DONE,     'd' }, /* Completed -- for routing messages only */
  91         { RTF_CLONING,  'C' },
  92         { RTF_XRESOLVE, 'X' },
  93         { RTF_LLINFO,   'L' },
  94         { RTF_STATIC,   'S' },
  95         { RTF_PROTO1,   '1' },
  96         { RTF_PROTO2,   '2' },
  97         { RTF_WASCLONED,'W' },
  98         { RTF_PRCLONING,'c' },
  99         { RTF_PROTO3,   '3' },
 100         { RTF_BLACKHOLE,'B' },
 101         { RTF_BROADCAST,'b' },
 102         { RTF_MPLSOPS,  'm' },
 103         { 0, 0 }
 104 };
 105
 106 typedef union {
 107         long    dummy;          /* Helps align structure. */
 108         struct  sockaddr u_sa;
 109         u_short u_data[128];
 110 } sa_u;
 111
 112 static sa_u pt_u;
 113
 114 int     do_rtent = 0;
 115 struct  rtentry rtentry;
 116 struct  radix_node rnode;
 117 struct  radix_mask rmask;
 118 struct  radix_node_head *rt_tables[AF_MAX+1];
 119
 120 int     NewTree = 0;
 121
 122 static struct sockaddr *kgetsa (struct sockaddr *);
 123 static void size_cols (int ef, struct radix_node *rn);
 124 static void size_cols_tree (struct radix_node *rn);
 125 static void size_cols_rtentry (struct rtentry *rt);
 126 static void p_tree (struct radix_node *);
 127 static void p_rtnode (void);
 128 static void ntreestuff (void);
 129 static void np_rtentry (struct rt_msghdr *);
 130 static void p_sockaddr (struct sockaddr *, struct sockaddr *, int, int);
 131 static const char *fmt_sockaddr (struct sockaddr *sa, struct sockaddr *mask,
 132                                  int flags);
 133 static void p_flags (int, const char *);
 134 static const char *fmt_flags(int f);
 135 static void p_rtentry (struct rtentry *);
 136 static u_long forgemask (u_long);
 137 static void domask (char *, u_long, u_long);
 138 static const char *labelops(struct rtentry *);
 139
 140 /*
 141  * Print routing tables.
 142  */
 143 void
 144 routepr(u_long rtree)
 145 {
 146         struct radix_node_head *rnh, head;
 147         int i;
 148
 149         printf("Routing tables\n");
 150
 151         if (Aflag == 0 && NewTree) {
 152                 ntreestuff();
 153         } else {
 154                 if (rtree == 0) {
 155                         printf("rt_tables: symbol not in namelist\n");
 156                         return;
 157                 }
 158                 if (cpuflag >= 0) {
 159                         /*
 160                          * Severe hack.
 161                          */
 162                         rtree += cpuflag * (AF_MAX + 1) * sizeof(void *);
 163                 }
 164                 kget(rtree, rt_tables);
 165                 for (i = 0; i <= AF_MAX; i++) {
 166                         if ((rnh = rt_tables[i]) == 0)
 167                                 continue;
 168                         kget(rnh, head);
 169                         if (i == AF_UNSPEC) {
 170                                 if (Aflag && af == 0) {
 171                                         printf("Netmasks:\n");
 172                                         p_tree(head.rnh_treetop);
 173                                 }
 174                         } else if (af == AF_UNSPEC || af == i) {
 175                                 size_cols(i, head.rnh_treetop);
 176                                 pr_family(i);
 177                                 do_rtent = 1;
 178                                 pr_rthdr(i);
 179                                 p_tree(head.rnh_treetop);
 180                         }
 181                 }
 182         }
 183 }
 184
 185 /*
 186  * Print address family header before a section of the routing table.
 187  */
 188 void
 189 pr_family(int af1)
 190 {
 191         const char *afname;
 192
 193         switch (af1) {
 194         case AF_INET:
 195                 afname = "Internet";
 196                 break;
 197 #ifdef INET6
 198         case AF_INET6:
 199                 afname = "Internet6";
 200                 break;
 201 #endif /*INET6*/
 202         case AF_IPX:
 203                 afname = "IPX";
 204                 break;
 205         case AF_ISO:
 206                 afname = "ISO";
 207                 break;
 208         case AF_CCITT:
 209                 afname = "X.25";
 210                 break;
 211         case AF_NETGRAPH:
 212                 afname = "Netgraph";
 213                 break;
 214         case AF_MPLS:
 215                 afname = "MPLS";
 216                 break;
 217         default:
 218                 afname = NULL;
 219                 break;
 220         }
 221         if (afname)
 222                 printf("\n%s:\n", afname);
 223         else
 224                 printf("\nProtocol Family %d:\n", af1);
 225 }
 226
 227 /* column widths; each followed by one space */
 228 #ifndef INET6
 229 #define WID_DST_DEFAULT(af)     18      /* width of destination column */
 230 #define WID_GW_DEFAULT(af)      18      /* width of gateway column */
 231 #define WID_IF_DEFAULT(af)      (Wflag ? 8 : 6) /* width of netif column */
 232 #else
 233 #define WID_DST_DEFAULT(af) \
 234         ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
 235 #define WID_GW_DEFAULT(af) \
 236         ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
 237 #define WID_IF_DEFAULT(af)      ((af) == AF_INET6 ? 8 : (Wflag ? 8 :6))
 238 #endif /*INET6*/
 239
 240 static int wid_dst;
 241 static int wid_gw;
 242 static int wid_flags;
 243 static int wid_refs;
 244 static int wid_use;
 245 static int wid_mtu;
 246 static int wid_if;
 247 static int wid_expire;
 248 static int wid_mplslops;
 249 static int wid_msl;
 250
 251 static void
 252 size_cols(int ef, struct radix_node *rn)
 253 {
 254         wid_dst = WID_DST_DEFAULT(ef);
 255         wid_gw = WID_GW_DEFAULT(ef);
 256         wid_flags = 6;
 257         wid_refs = 6;
 258         wid_use = 8;
 259         wid_mtu = 6;
 260         wid_if = WID_IF_DEFAULT(ef);
 261         wid_expire = 6;
 262         wid_mplslops = 7;
 263         wid_msl = 7;
 264
 265         if (Wflag)
 266                 size_cols_tree(rn);
 267 }
 268
 269 static void
 270 size_cols_tree(struct radix_node *rn)
 271 {
 272 again:
 273         kget(rn, rnode);
 274         if (rnode.rn_bit < 0) {
 275                 if ((rnode.rn_flags & RNF_ROOT) == 0) {
 276                         kget(rn, rtentry);
 277                         size_cols_rtentry(&rtentry);
 278                 }
 279                 if ((rn = rnode.rn_dupedkey))
 280                         goto again;
 281         } else {
 282                 rn = rnode.rn_right;
 283                 size_cols_tree(rnode.rn_left);
 284                 size_cols_tree(rn);
 285         }
 286 }
 287
 288 static void
 289 size_cols_rtentry(struct rtentry *rt)
 290 {
 291         static struct ifnet ifnet, *lastif;
 292         struct rtentry parent;
 293         static char buffer[100];
 294         const char *bp;
 295         struct sockaddr *sa;
 296         sa_u addr, mask;
 297         int len;
 298
 299         /*
 300          * Don't print protocol-cloned routes unless -a.
 301          */
 302         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 303                 kget(rt->rt_parent, parent);
 304                 if (parent.rt_flags & RTF_PRCLONING)
 305                         return;
 306         }
 307
 308         bzero(&addr, sizeof(addr));
 309         if ((sa = kgetsa(rt_key(rt))))
 310                 bcopy(sa, &addr, sa->sa_len);
 311         bzero(&mask, sizeof(mask));
 312         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 313                 bcopy(sa, &mask, sa->sa_len);
 314         bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
 315         len = strlen(bp);
 316         wid_dst = MAX(len, wid_dst);
 317
 318         bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
 319         len = strlen(bp);
 320         wid_gw = MAX(len, wid_gw);
 321
 322         bp = fmt_flags(rt->rt_flags);
 323         len = strlen(bp);
 324         wid_flags = MAX(len, wid_flags);
 325
 326         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 327                 len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
 328                 wid_refs = MAX(len, wid_refs);
 329                 len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
 330                 wid_use = MAX(len, wid_use);
 331                 if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
 332                         len = snprintf(buffer, sizeof(buffer),
 333                                        "%lu", rt->rt_rmx.rmx_mtu);
 334                         wid_mtu = MAX(len, wid_mtu);
 335                 }
 336         }
 337         if (rt->rt_ifp) {
 338                 if (rt->rt_ifp != lastif) {
 339                         kget(rt->rt_ifp, ifnet);
 340                         lastif = rt->rt_ifp;
 341                         len = strlen(ifnet.if_xname);
 342                         wid_if = MAX(len, wid_if);
 343                 }
 344                 if (rt->rt_rmx.rmx_expire) {
 345                         time_t expire_time;
 346
 347                         if ((expire_time =
 348                             rt->rt_rmx.rmx_expire - time(NULL)) > 0) {
 349                                 snprintf(buffer, sizeof(buffer), "%d",
 350                                          (int)expire_time);
 351                                 wid_expire = MAX(len, wid_expire);
 352                         }
 353                 }
 354         }
 355         if (Wflag) {
 356                 if (rt->rt_shim[0] != NULL) {
 357                         len = strlen(labelops(rt));
 358                         wid_mplslops = MAX(len, wid_mplslops);
 359                 }
 360
 361                 if (rt->rt_rmx.rmx_msl) {
 362                         len = snprintf(buffer, sizeof(buffer),
 363                                        "%lu", rt->rt_rmx.rmx_msl);
 364                         wid_msl = MAX(len, wid_msl);
 365                 }
 366         }
 367 }
 368
 369
 370 /*
 371  * Print header for routing table columns.
 372  */
 373 void
 374 pr_rthdr(int af1)
 375 {
 376
 377         if (Aflag)
 378                 printf("%-8.8s ","Address");
 379         if (af1 == AF_INET || Wflag) {
 380                 if (Wflag) {
 381                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*.*s %*s %-*s %*s\n",
 382                                 wid_dst,        wid_dst,        "Destination",
 383                                 wid_gw,         wid_gw,         "Gateway",
 384                                 wid_flags,      wid_flags,      "Flags",
 385                                 wid_refs,       wid_refs,       "Refs",
 386                                 wid_use,        wid_use,        "Use",
 387                                 wid_mtu,        wid_mtu,        "Mtu",
 388                                 wid_if,         wid_if,         "Netif",
 389                                 wid_expire,                     "Expire",
 390                                 wid_mplslops,                   "Labelops",
 391                                 wid_msl,                        "Msl");
 392                 } else {
 393                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*s\n",
 394                                 wid_dst,        wid_dst,        "Destination",
 395                                 wid_gw,         wid_gw,         "Gateway",
 396                                 wid_flags,      wid_flags,      "Flags",
 397                                 wid_refs,       wid_refs,       "Refs",
 398                                 wid_use,        wid_use,        "Use",
 399                                 wid_if,         wid_if,         "Netif",
 400                                 wid_expire,                     "Expire");
 401                 }
 402         } else {
 403                 printf("%-*.*s %-*.*s %-*.*s  %*.*s %*s\n",
 404                         wid_dst,        wid_dst,        "Destination",
 405                         wid_gw,         wid_gw,         "Gateway",
 406                         wid_flags,      wid_flags,      "Flags",
 407                         wid_if,         wid_if,         "Netif",
 408                         wid_expire,                     "Expire");
 409         }
 410 }
 411
 412 static struct sockaddr *
 413 kgetsa(struct sockaddr *dst)
 414 {
 415
 416         kget(dst, pt_u.u_sa);
 417         if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
 418                 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
 419         return (&pt_u.u_sa);
 420 }
 421
 422 static void
 423 p_tree(struct radix_node *rn)
 424 {
 425
 426 again:
 427         kget(rn, rnode);
 428         if (rnode.rn_bit < 0) {
 429                 if (Aflag)
 430                         printf("%-8.8lx ", (u_long)rn);
 431                 if (rnode.rn_flags & RNF_ROOT) {
 432                         if (Aflag)
 433                                 printf("(root node)%s",
 434                                     rnode.rn_dupedkey ? " =>\n" : "\n");
 435                 } else if (do_rtent) {
 436                         kget(rn, rtentry);
 437                         p_rtentry(&rtentry);
 438                         if (Aflag)
 439                                 p_rtnode();
 440                 } else {
 441                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
 442                                    NULL, 0, 44);
 443                         putchar('\n');
 444                 }
 445                 if ((rn = rnode.rn_dupedkey))
 446                         goto again;
 447         } else {
 448                 if (Aflag && do_rtent) {
 449                         printf("%-8.8lx ", (u_long)rn);
 450                         p_rtnode();
 451                 }
 452                 rn = rnode.rn_right;
 453                 p_tree(rnode.rn_left);
 454                 p_tree(rn);
 455         }
 456 }
 457
 458 char    nbuf[20];
 459
 460 static void
 461 p_rtnode(void)
 462 {
 463         struct radix_mask *rm = rnode.rn_mklist;
 464
 465         if (rnode.rn_bit < 0) {
 466                 if (rnode.rn_mask) {
 467                         printf("\t  mask ");
 468                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
 469                                    NULL, 0, -1);
 470                 } else if (rm == 0)
 471                         return;
 472         } else {
 473                 sprintf(nbuf, "(%d)", rnode.rn_bit);
 474                 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
 475         }
 476         while (rm) {
 477                 kget(rm, rmask);
 478                 sprintf(nbuf, " %d refs, ", rmask.rm_refs);
 479                 printf(" mk = %8.8lx {(%d),%s",
 480                         (u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
 481                 if (rmask.rm_flags & RNF_NORMAL) {
 482                         struct radix_node rnode_aux;
 483                         printf(" <normal>, ");
 484                         kget(rmask.rm_leaf, rnode_aux);
 485                         p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
 486                                     NULL, 0, -1);
 487                 } else
 488                     p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
 489                                 NULL, 0, -1);
 490                 putchar('}');
 491                 if ((rm = rmask.rm_next))
 492                         printf(" ->");
 493         }
 494         putchar('\n');
 495 }
 496
 497 static void
 498 ntreestuff(void)
 499 {
 500         size_t needed;
 501         int mib[7];
 502         int miblen;
 503         char *buf, *next, *lim;
 504         struct rt_msghdr *rtm;
 505
 506         mib[0] = CTL_NET;
 507         mib[1] = PF_ROUTE;
 508         mib[2] = 0;
 509         mib[3] = 0;
 510         mib[4] = NET_RT_DUMP;
 511         mib[5] = 0;
 512         if (cpuflag >= 0) {
 513                 mib[6] = cpuflag;
 514                 miblen = 7;
 515         } else {
 516                 miblen = 6;
 517         }
 518         if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) {
 519                 err(1, "sysctl: net.route.0.0.dump estimate");
 520         }
 521
 522         if ((buf = malloc(needed)) == 0) {
 523                 err(2, "malloc(%lu)", (unsigned long)needed);
 524         }
 525         if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) {
 526                 err(1, "sysctl: net.route.0.0.dump");
 527         }
 528         lim  = buf + needed;
 529         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 530                 rtm = (struct rt_msghdr *)next;
 531                 np_rtentry(rtm);
 532         }
 533 }
 534
 535 static void
 536 np_rtentry(struct rt_msghdr *rtm)
 537 {
 538         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 539 #ifdef notdef
 540         static int masks_done, banner_printed;
 541 #endif
 542         static int old_af;
 543         int af1 = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
 544
 545 #ifdef notdef
 546         /* for the moment, netmasks are skipped over */
 547         if (!banner_printed) {
 548                 printf("Netmasks:\n");
 549                 banner_printed = 1;
 550         }
 551         if (masks_done == 0) {
 552                 if (rtm->rtm_addrs != RTA_DST ) {
 553                         masks_done = 1;
 554                         af1 = sa->sa_family;
 555                 }
 556         } else
 557 #endif
 558                 af1 = sa->sa_family;
 559         if (af1 != old_af) {
 560                 pr_family(af1);
 561                 old_af = af1;
 562         }
 563         if (rtm->rtm_addrs == RTA_DST)
 564                 p_sockaddr(sa, NULL, 0, 36);
 565         else {
 566                 p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
 567                 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 568                 p_sockaddr(sa, NULL, 0, 18);
 569         }
 570         p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
 571         putchar('\n');
 572 }
 573
 574 static void
 575 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
 576 {
 577         const char *cp;
 578
 579         cp = fmt_sockaddr(sa, mask, flags);
 580
 581         if (width < 0 )
 582                 printf("%s ", cp);
 583         else {
 584                 if (numeric_addr)
 585                         printf("%-*s ", width, cp);
 586                 else
 587                         printf("%-*.*s ", width, width, cp);
 588         }
 589 }
 590
 591 static const char *
 592 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
 593 {
 594         static char workbuf[128];
 595         const char *cp = workbuf;
 596
 597         switch(sa->sa_family) {
 598         case AF_INET:
 599             {
 600                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 601
 602                 if ((sin->sin_addr.s_addr == INADDR_ANY) &&
 603                         mask &&
 604                         ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
 605                                 ==0L)
 606                                 cp = "default" ;
 607                 else if (flags & RTF_HOST)
 608                         cp = routename(sin->sin_addr.s_addr);
 609                 else if (mask)
 610                         cp = netname(sin->sin_addr.s_addr,
 611                                      ntohl(((struct sockaddr_in *)mask)
 612                                            ->sin_addr.s_addr));
 613                 else
 614                         cp = netname(sin->sin_addr.s_addr, 0L);
 615                 break;
 616             }
 617
 618 #ifdef INET6
 619         case AF_INET6:
 620             {
 621                 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
 622                 struct in6_addr *in6 = &sa6->sin6_addr;
 623
 624                 /*
 625                  * XXX: This is a special workaround for KAME kernels.
 626                  * sin6_scope_id field of SA should be set in the future.
 627                  */
 628                 if (IN6_IS_ADDR_LINKLOCAL(in6) ||
 629                     IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
 630                     /* XXX: override is ok? */
 631                     sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
 632                     *(u_short *)&in6->s6_addr[2] = 0;
 633                 }
 634
 635                 if (flags & RTF_HOST)
 636                     cp = routename6(sa6);
 637                 else if (mask)
 638                     cp = netname6(sa6,
 639                                   &((struct sockaddr_in6 *)mask)->sin6_addr);
 640                 else {
 641                     cp = netname6(sa6, NULL);
 642                 }
 643                 break;
 644             }
 645 #endif /*INET6*/
 646
 647         case AF_IPX:
 648             {
 649                 struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
 650                 if (ipx_nullnet(satoipx_addr(work)))
 651                         cp = "default";
 652                 else
 653                         cp = ipx_print(sa);
 654                 break;
 655             }
 656         case AF_NETGRAPH:
 657             {
 658                 printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
 659                 break;
 660             }
 661         case AF_LINK:
 662             {
 663                 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
 664
 665                 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
 666                     sdl->sdl_slen == 0)
 667                         (void) sprintf(workbuf, "link#%d", sdl->sdl_index);
 668                 else
 669                         switch (sdl->sdl_type) {
 670
 671                         case IFT_ETHER:
 672                         case IFT_L2VLAN:
 673                                 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 674                                         cp = ether_ntoa((struct ether_addr *)
 675                                             (sdl->sdl_data + sdl->sdl_nlen));
 676                                         break;
 677                                 }
 678                                 /* FALLTHROUGH */
 679                         default:
 680                                 cp = link_ntoa(sdl);
 681                                 break;
 682                         }
 683                 break;
 684             }
 685
 686         case AF_MPLS:
 687             {
 688                 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
 689
 690                 (void) sprintf(workbuf, "%d", ntohl(smpls->smpls_label));
 691                 break;
 692             }
 693
 694         default:
 695             {
 696                 u_char *s = (u_char *)sa->sa_data, *slim;
 697                 char *cq, *cqlim;
 698
 699                 cq = workbuf;
 700                 slim =  sa->sa_len + (u_char *) sa;
 701                 cqlim = cq + sizeof(workbuf) - 6;
 702                 cq += sprintf(cq, "(%d)", sa->sa_family);
 703                 while (s < slim && cq < cqlim) {
 704                         cq += sprintf(cq, " %02x", *s++);
 705                         if (s < slim)
 706                             cq += sprintf(cq, "%02x", *s++);
 707                 }
 708                 cp = workbuf;
 709             }
 710         }
 711
 712         return (cp);
 713 }
 714
 715 static void
 716 p_flags(int f, const char *format)
 717 {
 718         printf(format, fmt_flags(f));
 719 }
 720
 721 static const char *
 722 fmt_flags(int f)
 723 {
 724         static char name[33];
 725         char *flags;
 726         struct bits *p = bits;
 727
 728         for (flags = name; p->b_mask; p++)
 729                 if (p->b_mask & f)
 730                         *flags++ = p->b_val;
 731         *flags = '\0';
 732         return (name);
 733 }
 734
 735 static void
 736 p_rtentry(struct rtentry *rt)
 737 {
 738         static struct ifnet ifnet, *lastif;
 739         struct rtentry parent;
 740         static char buffer[128];
 741         static char prettyname[128];
 742         struct sockaddr *sa;
 743         sa_u addr, mask;
 744
 745         /*
 746          * Don't print protocol-cloned routes unless -a.
 747          */
 748         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 749                 kget(rt->rt_parent, parent);
 750                 if (parent.rt_flags & RTF_PRCLONING)
 751                         return;
 752         }
 753
 754         bzero(&addr, sizeof(addr));
 755         if ((sa = kgetsa(rt_key(rt))))
 756                 bcopy(sa, &addr, sa->sa_len);
 757         bzero(&mask, sizeof(mask));
 758         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 759                 bcopy(sa, &mask, sa->sa_len);
 760         p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
 761         p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
 762         snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
 763         p_flags(rt->rt_flags, buffer);
 764         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 765                 printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
 766                                      wid_use, rt->rt_use);
 767                 if (Wflag) {
 768                         if (rt->rt_rmx.rmx_mtu != 0)
 769                                 printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
 770                         else
 771                                 printf("%*s ", wid_mtu, "");
 772                 }
 773         }
 774         if (rt->rt_ifp) {
 775                 if (rt->rt_ifp != lastif) {
 776                         kget(rt->rt_ifp, ifnet);
 777                         lastif = rt->rt_ifp;
 778                         strlcpy(prettyname, ifnet.if_xname, sizeof(prettyname));
 779                 }
 780                 printf("%*.*s", wid_if, wid_if, prettyname);
 781                 if (rt->rt_rmx.rmx_expire) {
 782                         time_t expire_time;
 783
 784                         if ((expire_time =
 785                             rt->rt_rmx.rmx_expire - time(NULL)) > 0)
 786                                 printf(" %*d", wid_expire, (int)expire_time);
 787                         else
 788                                 printf("%*s ", wid_expire, "");
 789                 } else {
 790                         printf("%*s ", wid_expire, "");
 791                 }
 792                 if (rt->rt_nodes[0].rn_dupedkey)
 793                         printf(" =>");
 794         }
 795         if (Wflag) {
 796                 if (rt->rt_shim[0] != NULL)
 797                         printf(" %-*s", wid_mplslops, labelops(rt));
 798                 else
 799                         printf(" %-*s", wid_mplslops, "");
 800                 if (rt->rt_rmx.rmx_msl != 0)
 801                         printf(" %*lu", wid_msl, rt->rt_rmx.rmx_msl);
 802                 else
 803                         printf(" %*s", wid_msl, "");
 804         }
 805         putchar('\n');
 806 }
 807
 808 char *
 809 routename(u_long in)
 810 {
 811         char *cp;
 812         static char line[MAXHOSTNAMELEN];
 813         struct hostent *hp;
 814
 815         cp = 0;
 816         if (!numeric_addr) {
 817                 hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
 818                 if (hp) {
 819                         cp = hp->h_name;
 820                         trimdomain(cp, strlen(cp));
 821                 }
 822         }
 823         if (cp) {
 824                 strncpy(line, cp, sizeof(line) - 1);
 825                 line[sizeof(line) - 1] = '\0';
 826         } else {
 827 #define C(x)    ((x) & 0xff)
 828                 in = ntohl(in);
 829                 sprintf(line, "%lu.%lu.%lu.%lu",
 830                     C(in >> 24), C(in >> 16), C(in >> 8), C(in));
 831         }
 832         return (line);
 833 }
 834
 835 static u_long
 836 forgemask(u_long a)
 837 {
 838         u_long m;
 839
 840         if (IN_CLASSA(a))
 841                 m = IN_CLASSA_NET;
 842         else if (IN_CLASSB(a))
 843                 m = IN_CLASSB_NET;
 844         else
 845                 m = IN_CLASSC_NET;
 846         return (m);
 847 }
 848
 849 static void
 850 domask(char *dst, u_long addr, u_long mask)
 851 {
 852         int b, i;
 853
 854         if (!mask || (forgemask(addr) == mask)) {
 855                 *dst = '\0';
 856                 return;
 857         }
 858         i = 0;
 859         for (b = 0; b < 32; b++)
 860                 if (mask & (1 << b)) {
 861                         int bb;
 862
 863                         i = b;
 864                         for (bb = b+1; bb < 32; bb++)
 865                                 if (!(mask & (1 << bb))) {
 866                                         i = -1; /* noncontig */
 867                                         break;
 868                                 }
 869                         break;
 870                 }
 871         if (i == -1)
 872                 sprintf(dst, "&0x%lx", mask);
 873         else
 874                 sprintf(dst, "/%d", 32-i);
 875 }
 876
 877 /*
 878  * Return the name of the network whose address is given.
 879  * The address is assumed to be that of a net or subnet, not a host.
 880  */
 881 char *
 882 netname(u_long in, u_long mask)
 883 {
 884         char *cp = 0;
 885         static char line[MAXHOSTNAMELEN];
 886         struct netent *np = 0;
 887         u_long dmask;
 888         u_long i;
 889
 890 #define NSHIFT(m) (                                                     \
 891         (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :                       \
 892         (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :                       \
 893         (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :                       \
 894         0)
 895
 896         i = ntohl(in);
 897         dmask = forgemask(i);
 898         if (!numeric_addr && i) {
 899                 np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
 900                 if (np == NULL && mask == 0)
 901                         np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
 902                 if (np != NULL) {
 903                         cp = np->n_name;
 904                         trimdomain(cp, strlen(cp));
 905                 }
 906         }
 907 #undef NSHIFT
 908         if (cp != NULL) {
 909                 strncpy(line, cp, sizeof(line) - 1);
 910                 line[sizeof(line) - 1] = '\0';
 911         } else {
 912                 if (mask <= IN_CLASSA_NET &&
 913                         (i & IN_CLASSA_HOST) == 0) {
 914                                 sprintf(line, "%lu", C(i >> 24));
 915                 } else if (mask <= IN_CLASSB_NET &&
 916                         (i & IN_CLASSB_HOST) == 0) {
 917                                 sprintf(line, "%lu.%lu",
 918                                         C(i >> 24), C(i >> 16));
 919                 } else if (mask <= IN_CLASSC_NET &&
 920                         (i & IN_CLASSC_HOST) == 0) {
 921                                 sprintf(line, "%lu.%lu.%lu",
 922                                         C(i >> 24), C(i >> 16), C(i >> 8));
 923                 } else {
 924                         sprintf(line, "%lu.%lu.%lu.%lu",
 925                                 C(i >> 24), C(i >> 16), C(i >> 8), C(i));
 926                 }
 927         }
 928         domask(line + strlen(line), i, mask);
 929         return (line);
 930 }
 931
 932 #ifdef INET6
 933 const char *
 934 netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
 935 {
 936         static char line[MAXHOSTNAMELEN];
 937         u_char *p = (u_char *)mask;
 938         u_char *lim;
 939         int masklen, illegal = 0, flag = NI_WITHSCOPEID;
 940
 941         if (mask) {
 942                 for (masklen = 0, lim = p + 16; p < lim; p++) {
 943                         switch (*p) {
 944                          case 0xff:
 945                                  masklen += 8;
 946                                  break;
 947                          case 0xfe:
 948                                  masklen += 7;
 949                                  break;
 950                          case 0xfc:
 951                                  masklen += 6;
 952                                  break;
 953                          case 0xf8:
 954                                  masklen += 5;
 955                                  break;
 956                          case 0xf0:
 957                                  masklen += 4;
 958                                  break;
 959                          case 0xe0:
 960                                  masklen += 3;
 961                                  break;
 962                          case 0xc0:
 963                                  masklen += 2;
 964                                  break;
 965                          case 0x80:
 966                                  masklen += 1;
 967                                  break;
 968                          case 0x00:
 969                                  break;
 970                          default:
 971                                  illegal ++;
 972                                  break;
 973                         }
 974                 }
 975                 if (illegal)
 976                         fprintf(stderr, "illegal prefixlen\n");
 977         }
 978         else
 979                 masklen = 128;
 980
 981         if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
 982                 return("default");
 983
 984         if (numeric_addr)
 985                 flag |= NI_NUMERICHOST;
 986         getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
 987                     NULL, 0, flag);
 988
 989         if (numeric_addr)
 990                 sprintf(&line[strlen(line)], "/%d", masklen);
 991
 992         return line;
 993 }
 994
 995 char *
 996 routename6(struct sockaddr_in6 *sa6)
 997 {
 998         static char line[MAXHOSTNAMELEN];
 999         int flag = NI_WITHSCOPEID;
1000         /* use local variable for safety */
1001         struct sockaddr_in6 sa6_local;
1002
1003         sa6_local.sin6_family = AF_INET6;
1004         sa6_local.sin6_len = sizeof(sa6_local);
1005         sa6_local.sin6_addr = sa6->sin6_addr;
1006         sa6_local.sin6_scope_id = sa6->sin6_scope_id;
1007
1008         if (numeric_addr)
1009                 flag |= NI_NUMERICHOST;
1010
1011         getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
1012                     line, sizeof(line), NULL, 0, flag);
1013
1014         return line;
1015 }
1016 #endif /*INET6*/
1017
1018 /*
1019  * Print routing statistics
1020  */
1021 void
1022 rt_stats(void)
1023 {
1024         struct rtstatistics rts;
1025         int error = 0;
1026
1027         error = kinfo_get_net_rtstatistics(&rts);
1028         if (error) {
1029                 printf("routing: could not retrieve statistics\n");
1030                 return;
1031         }
1032         printf("routing:\n");
1033
1034 #define p(f, m) if (rts.f || sflag <= 1) \
1035         printf(m, rts.f, plural(rts.f))
1036
1037         p(rts_badredirect, "\t%lu bad routing redirect%s\n");
1038         p(rts_dynamic, "\t%lu dynamically created route%s\n");
1039         p(rts_newgateway, "\t%lu new gateway%s due to redirects\n");
1040         p(rts_unreach, "\t%lu destination%s found unreachable\n");
1041         p(rts_wildcard, "\t%lu use%s of a wildcard route\n");
1042 #undef p
1043 }
1044
1045 char *
1046 ipx_print(struct sockaddr *sa)
1047 {
1048         u_short port;
1049         struct servent *sp = 0;
1050         const char *net = "", *host = "";
1051         char *p;
1052         u_char *q;
1053         struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
1054         static char mybuf[50];
1055         char cport[10], chost[15], cnet[15];
1056
1057         port = ntohs(work.x_port);
1058
1059         if (ipx_nullnet(work) && ipx_nullhost(work)) {
1060
1061                 if (port) {
1062                         if (sp)
1063                                 sprintf(mybuf, "*.%s", sp->s_name);
1064                         else
1065                                 sprintf(mybuf, "*.%x", port);
1066                 } else
1067                         sprintf(mybuf, "*.*");
1068
1069                 return (mybuf);
1070         }
1071
1072         if (ipx_wildnet(work))
1073                 net = "any";
1074         else if (ipx_nullnet(work))
1075                 net = "*";
1076         else {
1077                 q = work.x_net.c_net;
1078                 sprintf(cnet, "%02x%02x%02x%02x",
1079                         q[0], q[1], q[2], q[3]);
1080                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
1081                         continue;
1082                 net = p;
1083         }
1084
1085         if (ipx_wildhost(work))
1086                 host = "any";
1087         else if (ipx_nullhost(work))
1088                 host = "*";
1089         else {
1090                 q = work.x_host.c_host;
1091                 sprintf(chost, "%02x%02x%02x%02x%02x%02x",
1092                         q[0], q[1], q[2], q[3], q[4], q[5]);
1093                 for (p = chost; *p == '0' && p < chost + 12; p++)
1094                         continue;
1095                 host = p;
1096         }
1097
1098         if (port) {
1099                 if (strcmp(host, "*") == 0)
1100                         host = "";
1101                 if (sp)
1102                         snprintf(cport, sizeof(cport),
1103                                 "%s%s", *host ? "." : "", sp->s_name);
1104                 else
1105                         snprintf(cport, sizeof(cport),
1106                                 "%s%x", *host ? "." : "", port);
1107         } else
1108                 *cport = 0;
1109
1110         snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
1111         return(mybuf);
1112 }
1113
1114 char *
1115 ipx_phost(struct sockaddr *sa)
1116 {
1117         struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
1118         struct sockaddr_ipx work;
1119         static union ipx_net ipx_zeronet;
1120         char *p;
1121         struct ipx_addr in;
1122
1123         work = *sipx;
1124         in = work.sipx_addr;
1125
1126         work.sipx_addr.x_port = 0;
1127         work.sipx_addr.x_net = ipx_zeronet;
1128         p = ipx_print((struct sockaddr *)&work);
1129         if (strncmp("*.", p, 2) == 0) p += 2;
1130
1131         return(p);
1132 }
1133
1134 void
1135 upHex(char *p0)
1136 {
1137         char *p = p0;
1138
1139         for (; *p; p++)
1140                 switch (*p) {
1141
1142                 case 'a':
1143                 case 'b':
1144                 case 'c':
1145                 case 'd':
1146                 case 'e':
1147                 case 'f':
1148                         *p += ('A' - 'a');
1149                         break;
1150                 }
1151 }
1152
1153 static const char *
1154 labelops(struct rtentry *rt)
1155 {
1156         const char *lops[] = { "push", "pop", "swap", "pop all" };
1157         static char buffer[100];
1158         char *cp = buffer;
1159         struct sockaddr_mpls *smpls;
1160         int i;
1161
1162         for (i=0; i<MPLS_MAXLOPS; ++i) {
1163
1164                 if (rt->rt_shim[i] == NULL)
1165                         break;
1166                 if (i>0) {
1167                         cp += snprintf(cp,
1168                                        sizeof(buffer) - (cp - buffer),
1169                                        ", ");
1170                 }
1171                 smpls = (struct sockaddr_mpls *)kgetsa(rt->rt_shim[i]);
1172                 if (smpls->smpls_op != MPLSLOP_POP &&
1173                     smpls->smpls_op != MPLSLOP_POPALL){
1174                         cp += snprintf(cp,
1175                                        sizeof(buffer) - (cp - buffer),
1176                                        "%s %d",
1177                                        lops[smpls->smpls_op - 1],
1178                                        ntohl(smpls->smpls_label));
1179                 } else {
1180                         cp += snprintf(cp,
1181                                        sizeof(buffer) - (cp - buffer),
1182                                        "%s",
1183                                        lops[smpls->smpls_op - 1]);
1184                 }
1185         }
1186
1187         return (buffer);
1188 }