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]) == NULL)
 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 static int wid_iwmax;
 251 static int wid_iw;
 252
 253 static void
 254 size_cols(int ef, struct radix_node *rn)
 255 {
 256         wid_dst = WID_DST_DEFAULT(ef);
 257         wid_gw = WID_GW_DEFAULT(ef);
 258         wid_flags = 6;
 259         wid_refs = 6;
 260         wid_use = 8;
 261         wid_mtu = 6;
 262         wid_if = WID_IF_DEFAULT(ef);
 263         wid_expire = 6;
 264         wid_mplslops = 7;
 265         wid_msl = 7;
 266         wid_iwmax = 5;
 267         wid_iw = 2;
 268
 269         if (Wflag)
 270                 size_cols_tree(rn);
 271 }
 272
 273 static void
 274 size_cols_tree(struct radix_node *rn)
 275 {
 276 again:
 277         kget(rn, rnode);
 278         if (rnode.rn_bit < 0) {
 279                 if ((rnode.rn_flags & RNF_ROOT) == 0) {
 280                         kget(rn, rtentry);
 281                         size_cols_rtentry(&rtentry);
 282                 }
 283                 if ((rn = rnode.rn_dupedkey))
 284                         goto again;
 285         } else {
 286                 rn = rnode.rn_right;
 287                 size_cols_tree(rnode.rn_left);
 288                 size_cols_tree(rn);
 289         }
 290 }
 291
 292 static void
 293 size_cols_rtentry(struct rtentry *rt)
 294 {
 295         static struct ifnet ifnet, *lastif;
 296         struct rtentry parent;
 297         static char buffer[100];
 298         const char *bp;
 299         struct sockaddr *sa;
 300         sa_u addr, mask;
 301         int len;
 302
 303         /*
 304          * Don't print protocol-cloned routes unless -a.
 305          */
 306         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 307                 kget(rt->rt_parent, parent);
 308                 if (parent.rt_flags & RTF_PRCLONING)
 309                         return;
 310         }
 311
 312         bzero(&addr, sizeof(addr));
 313         if ((sa = kgetsa(rt_key(rt))))
 314                 bcopy(sa, &addr, sa->sa_len);
 315         bzero(&mask, sizeof(mask));
 316         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 317                 bcopy(sa, &mask, sa->sa_len);
 318         bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
 319         len = strlen(bp);
 320         wid_dst = MAX(len, wid_dst);
 321
 322         bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
 323         len = strlen(bp);
 324         wid_gw = MAX(len, wid_gw);
 325
 326         bp = fmt_flags(rt->rt_flags);
 327         len = strlen(bp);
 328         wid_flags = MAX(len, wid_flags);
 329
 330         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 331                 len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
 332                 wid_refs = MAX(len, wid_refs);
 333                 len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
 334                 wid_use = MAX(len, wid_use);
 335                 if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
 336                         len = snprintf(buffer, sizeof(buffer),
 337                                        "%lu", rt->rt_rmx.rmx_mtu);
 338                         wid_mtu = MAX(len, wid_mtu);
 339                 }
 340         }
 341         if (rt->rt_ifp) {
 342                 if (rt->rt_ifp != lastif) {
 343                         kget(rt->rt_ifp, ifnet);
 344                         lastif = rt->rt_ifp;
 345                         len = strlen(ifnet.if_xname);
 346                         wid_if = MAX(len, wid_if);
 347                 }
 348                 if (rt->rt_rmx.rmx_expire) {
 349                         time_t expire_time;
 350
 351                         if ((expire_time =
 352                             rt->rt_rmx.rmx_expire - time(NULL)) > 0) {
 353                                 snprintf(buffer, sizeof(buffer), "%d",
 354                                          (int)expire_time);
 355                                 wid_expire = MAX(len, wid_expire);
 356                         }
 357                 }
 358         }
 359         if (Wflag) {
 360                 if (rt->rt_shim[0] != NULL) {
 361                         len = strlen(labelops(rt));
 362                         wid_mplslops = MAX(len, wid_mplslops);
 363                 }
 364
 365                 if (rt->rt_rmx.rmx_msl) {
 366                         len = snprintf(buffer, sizeof(buffer),
 367                                        "%lu", rt->rt_rmx.rmx_msl);
 368                         wid_msl = MAX(len, wid_msl);
 369                 }
 370                 if (rt->rt_rmx.rmx_iwmaxsegs) {
 371                         len = snprintf(buffer, sizeof(buffer),
 372                                        "%lu", rt->rt_rmx.rmx_iwmaxsegs);
 373                         wid_iwmax = MAX(len, wid_iwmax);
 374                 }
 375                 if (rt->rt_rmx.rmx_iwcapsegs) {
 376                         len = snprintf(buffer, sizeof(buffer),
 377                                        "%lu", rt->rt_rmx.rmx_iwcapsegs);
 378                         wid_iw = MAX(len, wid_iw);
 379                 }
 380         }
 381 }
 382
 383
 384 /*
 385  * Print header for routing table columns.
 386  */
 387 void
 388 pr_rthdr(int af1)
 389 {
 390
 391         if (Aflag)
 392                 printf("%-8.8s ","Address");
 393         if (af1 == AF_INET || Wflag) {
 394                 if (Wflag) {
 395                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*.*s "
 396                                "%*s %-*s%*s %*s %*s\n",
 397                                 wid_dst,        wid_dst,        "Destination",
 398                                 wid_gw,         wid_gw,         "Gateway",
 399                                 wid_flags,      wid_flags,      "Flags",
 400                                 wid_refs,       wid_refs,       "Refs",
 401                                 wid_use,        wid_use,        "Use",
 402                                 wid_mtu,        wid_mtu,        "Mtu",
 403                                 wid_if,         wid_if,         "Netif",
 404                                 wid_expire,                     "Expire",
 405                                 wid_mplslops,                   "Labelops",
 406                                 wid_msl,                        "Msl",
 407                                 wid_iwmax,                      "IWmax",
 408                                 wid_iw,                         "IW");
 409                 } else {
 410                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*s\n",
 411                                 wid_dst,        wid_dst,        "Destination",
 412                                 wid_gw,         wid_gw,         "Gateway",
 413                                 wid_flags,      wid_flags,      "Flags",
 414                                 wid_refs,       wid_refs,       "Refs",
 415                                 wid_use,        wid_use,        "Use",
 416                                 wid_if,         wid_if,         "Netif",
 417                                 wid_expire,                     "Expire");
 418                 }
 419         } else {
 420                 printf("%-*.*s %-*.*s %-*.*s  %*.*s %*s\n",
 421                         wid_dst,        wid_dst,        "Destination",
 422                         wid_gw,         wid_gw,         "Gateway",
 423                         wid_flags,      wid_flags,      "Flags",
 424                         wid_if,         wid_if,         "Netif",
 425                         wid_expire,                     "Expire");
 426         }
 427 }
 428
 429 static struct sockaddr *
 430 kgetsa(struct sockaddr *dst)
 431 {
 432
 433         kget(dst, pt_u.u_sa);
 434         if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
 435                 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
 436         return (&pt_u.u_sa);
 437 }
 438
 439 static void
 440 p_tree(struct radix_node *rn)
 441 {
 442
 443 again:
 444         kget(rn, rnode);
 445         if (rnode.rn_bit < 0) {
 446                 if (Aflag)
 447                         printf("%-8.8lx ", (u_long)rn);
 448                 if (rnode.rn_flags & RNF_ROOT) {
 449                         if (Aflag)
 450                                 printf("(root node)%s",
 451                                     rnode.rn_dupedkey ? " =>\n" : "\n");
 452                 } else if (do_rtent) {
 453                         kget(rn, rtentry);
 454                         p_rtentry(&rtentry);
 455                         if (Aflag)
 456                                 p_rtnode();
 457                 } else {
 458                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
 459                                    NULL, 0, 44);
 460                         putchar('\n');
 461                 }
 462                 if ((rn = rnode.rn_dupedkey))
 463                         goto again;
 464         } else {
 465                 if (Aflag && do_rtent) {
 466                         printf("%-8.8lx ", (u_long)rn);
 467                         p_rtnode();
 468                 }
 469                 rn = rnode.rn_right;
 470                 p_tree(rnode.rn_left);
 471                 p_tree(rn);
 472         }
 473 }
 474
 475 char    nbuf[20];
 476
 477 static void
 478 p_rtnode(void)
 479 {
 480         struct radix_mask *rm = rnode.rn_mklist;
 481
 482         if (rnode.rn_bit < 0) {
 483                 if (rnode.rn_mask) {
 484                         printf("\t  mask ");
 485                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
 486                                    NULL, 0, -1);
 487                 } else if (rm == NULL)
 488                         return;
 489         } else {
 490                 sprintf(nbuf, "(%d)", rnode.rn_bit);
 491                 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
 492         }
 493         while (rm) {
 494                 kget(rm, rmask);
 495                 sprintf(nbuf, " %d refs, ", rmask.rm_refs);
 496                 printf(" mk = %8.8lx {(%d),%s",
 497                         (u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
 498                 if (rmask.rm_flags & RNF_NORMAL) {
 499                         struct radix_node rnode_aux;
 500                         printf(" <normal>, ");
 501                         kget(rmask.rm_leaf, rnode_aux);
 502                         p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
 503                                     NULL, 0, -1);
 504                 } else
 505                     p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
 506                                 NULL, 0, -1);
 507                 putchar('}');
 508                 if ((rm = rmask.rm_next))
 509                         printf(" ->");
 510         }
 511         putchar('\n');
 512 }
 513
 514 static void
 515 ntreestuff(void)
 516 {
 517         size_t needed;
 518         int mib[7];
 519         int miblen;
 520         char *buf, *next, *lim;
 521         struct rt_msghdr *rtm;
 522
 523         mib[0] = CTL_NET;
 524         mib[1] = PF_ROUTE;
 525         mib[2] = 0;
 526         mib[3] = 0;
 527         mib[4] = NET_RT_DUMP;
 528         mib[5] = 0;
 529         if (cpuflag >= 0) {
 530                 mib[6] = cpuflag;
 531                 miblen = 7;
 532         } else {
 533                 miblen = 6;
 534         }
 535         if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) {
 536                 err(1, "sysctl: net.route.0.0.dump estimate");
 537         }
 538
 539         if ((buf = malloc(needed)) == NULL) {
 540                 err(2, "malloc(%lu)", (unsigned long)needed);
 541         }
 542         if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) {
 543                 err(1, "sysctl: net.route.0.0.dump");
 544         }
 545         lim  = buf + needed;
 546         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 547                 rtm = (struct rt_msghdr *)next;
 548                 np_rtentry(rtm);
 549         }
 550 }
 551
 552 static void
 553 np_rtentry(struct rt_msghdr *rtm)
 554 {
 555         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 556 #ifdef notdef
 557         static int masks_done, banner_printed;
 558 #endif
 559         static int old_af;
 560         int af1 = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
 561
 562 #ifdef notdef
 563         /* for the moment, netmasks are skipped over */
 564         if (!banner_printed) {
 565                 printf("Netmasks:\n");
 566                 banner_printed = 1;
 567         }
 568         if (masks_done == 0) {
 569                 if (rtm->rtm_addrs != RTA_DST ) {
 570                         masks_done = 1;
 571                         af1 = sa->sa_family;
 572                 }
 573         } else
 574 #endif
 575                 af1 = sa->sa_family;
 576         if (af1 != old_af) {
 577                 pr_family(af1);
 578                 old_af = af1;
 579         }
 580         if (rtm->rtm_addrs == RTA_DST)
 581                 p_sockaddr(sa, NULL, 0, 36);
 582         else {
 583                 p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
 584                 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 585                 p_sockaddr(sa, NULL, 0, 18);
 586         }
 587         p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
 588         putchar('\n');
 589 }
 590
 591 static void
 592 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
 593 {
 594         const char *cp;
 595
 596         cp = fmt_sockaddr(sa, mask, flags);
 597
 598         if (width < 0 )
 599                 printf("%s ", cp);
 600         else {
 601                 if (numeric_addr)
 602                         printf("%-*s ", width, cp);
 603                 else
 604                         printf("%-*.*s ", width, width, cp);
 605         }
 606 }
 607
 608 static const char *
 609 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
 610 {
 611         static char workbuf[128];
 612         const char *cp = workbuf;
 613
 614         switch(sa->sa_family) {
 615         case AF_INET:
 616             {
 617                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 618
 619                 if ((sin->sin_addr.s_addr == INADDR_ANY) &&
 620                         mask &&
 621                         ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
 622                                 ==0L)
 623                                 cp = "default" ;
 624                 else if (flags & RTF_HOST)
 625                         cp = routename(sin->sin_addr.s_addr);
 626                 else if (mask)
 627                         cp = netname(sin->sin_addr.s_addr,
 628                                      ntohl(((struct sockaddr_in *)mask)
 629                                            ->sin_addr.s_addr));
 630                 else
 631                         cp = netname(sin->sin_addr.s_addr, 0L);
 632                 break;
 633             }
 634
 635 #ifdef INET6
 636         case AF_INET6:
 637             {
 638                 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
 639                 struct in6_addr *in6 = &sa6->sin6_addr;
 640
 641                 /*
 642                  * XXX: This is a special workaround for KAME kernels.
 643                  * sin6_scope_id field of SA should be set in the future.
 644                  */
 645                 if (IN6_IS_ADDR_LINKLOCAL(in6) ||
 646                     IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
 647                     /* XXX: override is ok? */
 648                     sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
 649                     *(u_short *)&in6->s6_addr[2] = 0;
 650                 }
 651
 652                 if (flags & RTF_HOST)
 653                     cp = routename6(sa6);
 654                 else if (mask)
 655                     cp = netname6(sa6,
 656                                   &((struct sockaddr_in6 *)mask)->sin6_addr);
 657                 else {
 658                     cp = netname6(sa6, NULL);
 659                 }
 660                 break;
 661             }
 662 #endif /*INET6*/
 663
 664         case AF_IPX:
 665             {
 666                 struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
 667                 if (ipx_nullnet(satoipx_addr(work)))
 668                         cp = "default";
 669                 else
 670                         cp = ipx_print(sa);
 671                 break;
 672             }
 673         case AF_NETGRAPH:
 674             {
 675                 printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
 676                 break;
 677             }
 678         case AF_LINK:
 679             {
 680                 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
 681
 682                 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
 683                     sdl->sdl_slen == 0)
 684                         (void) sprintf(workbuf, "link#%d", sdl->sdl_index);
 685                 else
 686                         switch (sdl->sdl_type) {
 687
 688                         case IFT_ETHER:
 689                         case IFT_L2VLAN:
 690                         case IFT_CARP:
 691                                 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 692                                         cp = ether_ntoa((struct ether_addr *)
 693                                             (sdl->sdl_data + sdl->sdl_nlen));
 694                                         break;
 695                                 }
 696                                 /* FALLTHROUGH */
 697                         default:
 698                                 cp = link_ntoa(sdl);
 699                                 break;
 700                         }
 701                 break;
 702             }
 703
 704         case AF_MPLS:
 705             {
 706                 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
 707
 708                 (void) sprintf(workbuf, "%d", ntohl(smpls->smpls_label));
 709                 break;
 710             }
 711
 712         default:
 713             {
 714                 u_char *s = (u_char *)sa->sa_data, *slim;
 715                 char *cq, *cqlim;
 716
 717                 cq = workbuf;
 718                 slim =  sa->sa_len + (u_char *) sa;
 719                 cqlim = cq + sizeof(workbuf) - 6;
 720                 cq += sprintf(cq, "(%d)", sa->sa_family);
 721                 while (s < slim && cq < cqlim) {
 722                         cq += sprintf(cq, " %02x", *s++);
 723                         if (s < slim)
 724                             cq += sprintf(cq, "%02x", *s++);
 725                 }
 726                 cp = workbuf;
 727             }
 728         }
 729
 730         return (cp);
 731 }
 732
 733 static void
 734 p_flags(int f, const char *format)
 735 {
 736         printf(format, fmt_flags(f));
 737 }
 738
 739 static const char *
 740 fmt_flags(int f)
 741 {
 742         static char name[33];
 743         char *flags;
 744         struct bits *p = bits;
 745
 746         for (flags = name; p->b_mask; p++)
 747                 if (p->b_mask & f)
 748                         *flags++ = p->b_val;
 749         *flags = '\0';
 750         return (name);
 751 }
 752
 753 static void
 754 p_rtentry(struct rtentry *rt)
 755 {
 756         static struct ifnet ifnet, *lastif;
 757         struct rtentry parent;
 758         static char buffer[128];
 759         static char prettyname[128];
 760         struct sockaddr *sa;
 761         sa_u addr, mask;
 762
 763         /*
 764          * Don't print protocol-cloned routes unless -a.
 765          */
 766         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 767                 kget(rt->rt_parent, parent);
 768                 if (parent.rt_flags & RTF_PRCLONING)
 769                         return;
 770         }
 771
 772         bzero(&addr, sizeof(addr));
 773         if ((sa = kgetsa(rt_key(rt))))
 774                 bcopy(sa, &addr, sa->sa_len);
 775         bzero(&mask, sizeof(mask));
 776         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 777                 bcopy(sa, &mask, sa->sa_len);
 778         p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
 779         p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
 780         snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
 781         p_flags(rt->rt_flags, buffer);
 782         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 783                 printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
 784                                      wid_use, rt->rt_use);
 785                 if (Wflag) {
 786                         if (rt->rt_rmx.rmx_mtu != 0)
 787                                 printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
 788                         else
 789                                 printf("%*s ", wid_mtu, "");
 790                 }
 791         }
 792         if (rt->rt_ifp) {
 793                 if (rt->rt_ifp != lastif) {
 794                         kget(rt->rt_ifp, ifnet);
 795                         lastif = rt->rt_ifp;
 796                         strlcpy(prettyname, ifnet.if_xname, sizeof(prettyname));
 797                 }
 798                 printf("%*.*s", wid_if, wid_if, prettyname);
 799                 if (rt->rt_rmx.rmx_expire) {
 800                         time_t expire_time;
 801
 802                         if ((expire_time =
 803                             rt->rt_rmx.rmx_expire - time(NULL)) > 0)
 804                                 printf(" %*d", wid_expire, (int)expire_time);
 805                         else
 806                                 printf("%*s ", wid_expire, "");
 807                 } else {
 808                         printf("%*s ", wid_expire, "");
 809                 }
 810                 if (rt->rt_nodes[0].rn_dupedkey)
 811                         printf(" =>");
 812         }
 813         if (Wflag) {
 814                 if (rt->rt_shim[0] != NULL)
 815                         printf(" %-*s", wid_mplslops, labelops(rt));
 816                 else
 817                         printf(" %-*s", wid_mplslops, "");
 818                 if (rt->rt_rmx.rmx_msl != 0)
 819                         printf(" %*lu", wid_msl, rt->rt_rmx.rmx_msl);
 820                 else
 821                         printf("%*s ", wid_msl, "");
 822                 if (rt->rt_rmx.rmx_iwmaxsegs != 0)
 823                         printf(" %*lu", wid_iwmax, rt->rt_rmx.rmx_iwmaxsegs);
 824                 else
 825                         printf("%*s ", wid_iwmax, "");
 826                 if (rt->rt_rmx.rmx_iwcapsegs != 0)
 827                         printf(" %*lu", wid_iw, rt->rt_rmx.rmx_iwcapsegs);
 828                 else
 829                         printf("%*s ", wid_iw, "");
 830         }
 831         putchar('\n');
 832 }
 833
 834 char *
 835 routename(u_long in)
 836 {
 837         char *cp;
 838         static char line[MAXHOSTNAMELEN];
 839         struct hostent *hp;
 840
 841         cp = NULL;
 842         if (!numeric_addr) {
 843                 hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
 844                 if (hp) {
 845                         cp = hp->h_name;
 846                         trimdomain(cp, strlen(cp));
 847                 }
 848         }
 849         if (cp) {
 850                 strncpy(line, cp, sizeof(line) - 1);
 851                 line[sizeof(line) - 1] = '\0';
 852         } else {
 853 #define C(x)    ((x) & 0xff)
 854                 in = ntohl(in);
 855                 sprintf(line, "%lu.%lu.%lu.%lu",
 856                     C(in >> 24), C(in >> 16), C(in >> 8), C(in));
 857         }
 858         return (line);
 859 }
 860
 861 static u_long
 862 forgemask(u_long a)
 863 {
 864         u_long m;
 865
 866         if (IN_CLASSA(a))
 867                 m = IN_CLASSA_NET;
 868         else if (IN_CLASSB(a))
 869                 m = IN_CLASSB_NET;
 870         else
 871                 m = IN_CLASSC_NET;
 872         return (m);
 873 }
 874
 875 static void
 876 domask(char *dst, u_long addr, u_long mask)
 877 {
 878         int b, i;
 879
 880         if (!mask || (forgemask(addr) == mask)) {
 881                 *dst = '\0';
 882                 return;
 883         }
 884         i = 0;
 885         for (b = 0; b < 32; b++)
 886                 if (mask & (1 << b)) {
 887                         int bb;
 888
 889                         i = b;
 890                         for (bb = b+1; bb < 32; bb++)
 891                                 if (!(mask & (1 << bb))) {
 892                                         i = -1; /* noncontig */
 893                                         break;
 894                                 }
 895                         break;
 896                 }
 897         if (i == -1)
 898                 sprintf(dst, "&0x%lx", mask);
 899         else
 900                 sprintf(dst, "/%d", 32-i);
 901 }
 902
 903 /*
 904  * Return the name of the network whose address is given.
 905  * The address is assumed to be that of a net or subnet, not a host.
 906  */
 907 char *
 908 netname(u_long in, u_long mask)
 909 {
 910         char *cp = NULL;
 911         static char line[MAXHOSTNAMELEN];
 912         struct netent *np = NULL;
 913         u_long dmask;
 914         u_long i;
 915
 916 #define NSHIFT(m) (                                                     \
 917         (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :                       \
 918         (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :                       \
 919         (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :                       \
 920         0)
 921
 922         i = ntohl(in);
 923         dmask = forgemask(i);
 924         if (!numeric_addr && i) {
 925                 np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
 926                 if (np == NULL && mask == 0)
 927                         np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
 928                 if (np != NULL) {
 929                         cp = np->n_name;
 930                         trimdomain(cp, strlen(cp));
 931                 }
 932         }
 933 #undef NSHIFT
 934         if (cp != NULL) {
 935                 strncpy(line, cp, sizeof(line) - 1);
 936                 line[sizeof(line) - 1] = '\0';
 937         } else {
 938                 if (mask <= IN_CLASSA_NET &&
 939                         (i & IN_CLASSA_HOST) == 0) {
 940                                 sprintf(line, "%lu", C(i >> 24));
 941                 } else if (mask <= IN_CLASSB_NET &&
 942                         (i & IN_CLASSB_HOST) == 0) {
 943                                 sprintf(line, "%lu.%lu",
 944                                         C(i >> 24), C(i >> 16));
 945                 } else if (mask <= IN_CLASSC_NET &&
 946                         (i & IN_CLASSC_HOST) == 0) {
 947                                 sprintf(line, "%lu.%lu.%lu",
 948                                         C(i >> 24), C(i >> 16), C(i >> 8));
 949                 } else {
 950                         sprintf(line, "%lu.%lu.%lu.%lu",
 951                                 C(i >> 24), C(i >> 16), C(i >> 8), C(i));
 952                 }
 953         }
 954         domask(line + strlen(line), i, mask);
 955         return (line);
 956 }
 957
 958 #ifdef INET6
 959 const char *
 960 netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
 961 {
 962         static char line[MAXHOSTNAMELEN];
 963         u_char *p = (u_char *)mask;
 964         u_char *lim;
 965         int masklen, illegal = 0, flag = NI_WITHSCOPEID;
 966
 967         if (mask) {
 968                 for (masklen = 0, lim = p + 16; p < lim; p++) {
 969                         switch (*p) {
 970                          case 0xff:
 971                                  masklen += 8;
 972                                  break;
 973                          case 0xfe:
 974                                  masklen += 7;
 975                                  break;
 976                          case 0xfc:
 977                                  masklen += 6;
 978                                  break;
 979                          case 0xf8:
 980                                  masklen += 5;
 981                                  break;
 982                          case 0xf0:
 983                                  masklen += 4;
 984                                  break;
 985                          case 0xe0:
 986                                  masklen += 3;
 987                                  break;
 988                          case 0xc0:
 989                                  masklen += 2;
 990                                  break;
 991                          case 0x80:
 992                                  masklen += 1;
 993                                  break;
 994                          case 0x00:
 995                                  break;
 996                          default:
 997                                  illegal ++;
 998                                  break;
 999                         }
1000                 }
1001                 if (illegal)
1002                         fprintf(stderr, "illegal prefixlen\n");
1003         }
1004         else
1005                 masklen = 128;
1006
1007         if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
1008                 return("default");
1009
1010         if (numeric_addr)
1011                 flag |= NI_NUMERICHOST;
1012         getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
1013                     NULL, 0, flag);
1014
1015         if (numeric_addr)
1016                 sprintf(&line[strlen(line)], "/%d", masklen);
1017
1018         return line;
1019 }
1020
1021 char *
1022 routename6(struct sockaddr_in6 *sa6)
1023 {
1024         static char line[MAXHOSTNAMELEN];
1025         int flag = NI_WITHSCOPEID;
1026         /* use local variable for safety */
1027         struct sockaddr_in6 sa6_local;
1028
1029         sa6_local.sin6_family = AF_INET6;
1030         sa6_local.sin6_len = sizeof(sa6_local);
1031         sa6_local.sin6_addr = sa6->sin6_addr;
1032         sa6_local.sin6_scope_id = sa6->sin6_scope_id;
1033
1034         if (numeric_addr)
1035                 flag |= NI_NUMERICHOST;
1036
1037         getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
1038                     line, sizeof(line), NULL, 0, flag);
1039
1040         return line;
1041 }
1042 #endif /*INET6*/
1043
1044 /*
1045  * Print routing statistics
1046  */
1047 void
1048 rt_stats(void)
1049 {
1050         struct rtstatistics rts;
1051         int error = 0;
1052
1053         error = kinfo_get_net_rtstatistics(&rts);
1054         if (error) {
1055                 printf("routing: could not retrieve statistics\n");
1056                 return;
1057         }
1058         printf("routing:\n");
1059
1060 #define p(f, m) if (rts.f || sflag <= 1) \
1061         printf(m, rts.f, plural(rts.f))
1062
1063         p(rts_badredirect, "\t%lu bad routing redirect%s\n");
1064         p(rts_dynamic, "\t%lu dynamically created route%s\n");
1065         p(rts_newgateway, "\t%lu new gateway%s due to redirects\n");
1066         p(rts_unreach, "\t%lu destination%s found unreachable\n");
1067         p(rts_wildcard, "\t%lu use%s of a wildcard route\n");
1068 #undef p
1069 }
1070
1071 char *
1072 ipx_print(struct sockaddr *sa)
1073 {
1074         u_short port;
1075         struct servent *sp = NULL;
1076         const char *net = "", *host = "";
1077         char *p;
1078         u_char *q;
1079         struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
1080         static char mybuf[50];
1081         char cport[10], chost[15], cnet[15];
1082
1083         port = ntohs(work.x_port);
1084
1085         if (ipx_nullnet(work) && ipx_nullhost(work)) {
1086
1087                 if (port) {
1088                         if (sp)
1089                                 sprintf(mybuf, "*.%s", sp->s_name);
1090                         else
1091                                 sprintf(mybuf, "*.%x", port);
1092                 } else
1093                         sprintf(mybuf, "*.*");
1094
1095                 return (mybuf);
1096         }
1097
1098         if (ipx_wildnet(work))
1099                 net = "any";
1100         else if (ipx_nullnet(work))
1101                 net = "*";
1102         else {
1103                 q = work.x_net.c_net;
1104                 sprintf(cnet, "%02x%02x%02x%02x",
1105                         q[0], q[1], q[2], q[3]);
1106                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
1107                         continue;
1108                 net = p;
1109         }
1110
1111         if (ipx_wildhost(work))
1112                 host = "any";
1113         else if (ipx_nullhost(work))
1114                 host = "*";
1115         else {
1116                 q = work.x_host.c_host;
1117                 sprintf(chost, "%02x%02x%02x%02x%02x%02x",
1118                         q[0], q[1], q[2], q[3], q[4], q[5]);
1119                 for (p = chost; *p == '0' && p < chost + 12; p++)
1120                         continue;
1121                 host = p;
1122         }
1123
1124         if (port) {
1125                 if (strcmp(host, "*") == 0)
1126                         host = "";
1127                 if (sp)
1128                         snprintf(cport, sizeof(cport),
1129                                 "%s%s", *host ? "." : "", sp->s_name);
1130                 else
1131                         snprintf(cport, sizeof(cport),
1132                                 "%s%x", *host ? "." : "", port);
1133         } else
1134                 *cport = 0;
1135
1136         snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
1137         return(mybuf);
1138 }
1139
1140 char *
1141 ipx_phost(struct sockaddr *sa)
1142 {
1143         struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
1144         struct sockaddr_ipx work;
1145         static union ipx_net ipx_zeronet;
1146         char *p;
1147
1148         work = *sipx;
1149         work.sipx_addr.x_port = 0;
1150         work.sipx_addr.x_net = ipx_zeronet;
1151         p = ipx_print((struct sockaddr *)&work);
1152         if (strncmp("*.", p, 2) == 0) p += 2;
1153
1154         return(p);
1155 }
1156
1157 void
1158 upHex(char *p0)
1159 {
1160         char *p = p0;
1161
1162         for (; *p; p++)
1163                 switch (*p) {
1164
1165                 case 'a':
1166                 case 'b':
1167                 case 'c':
1168                 case 'd':
1169                 case 'e':
1170                 case 'f':
1171                         *p += ('A' - 'a');
1172                         break;
1173                 }
1174 }
1175
1176 static const char *
1177 labelops(struct rtentry *rt)
1178 {
1179         const char *lops[] = { "push", "pop", "swap", "pop all" };
1180         static char buffer[100];
1181         char *cp = buffer;
1182         struct sockaddr_mpls *smpls;
1183         int i;
1184
1185         for (i=0; i<MPLS_MAXLOPS; ++i) {
1186
1187                 if (rt->rt_shim[i] == NULL)
1188                         break;
1189                 if (i>0) {
1190                         cp += snprintf(cp,
1191                                        sizeof(buffer) - (cp - buffer),
1192                                        ", ");
1193                 }
1194                 smpls = (struct sockaddr_mpls *)kgetsa(rt->rt_shim[i]);
1195                 if (smpls->smpls_op != MPLSLOP_POP &&
1196                     smpls->smpls_op != MPLSLOP_POPALL){
1197                         cp += snprintf(cp,
1198                                        sizeof(buffer) - (cp - buffer),
1199                                        "%s %d",
1200                                        lops[smpls->smpls_op - 1],
1201                                        ntohl(smpls->smpls_label));
1202                 } else {
1203                         cp += snprintf(cp,
1204                                        sizeof(buffer) - (cp - buffer),
1205                                        "%s",
1206                                        lops[smpls->smpls_op - 1]);
1207                 }
1208         }
1209
1210         return (buffer);
1211 }