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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)route.c  8.6 (Berkeley) 4/28/95
  30  * $FreeBSD: src/usr.bin/netstat/route.c,v 1.41.2.14 2002/07/17 02:22:22 kbyanc Exp $
  31  */
  32
  33 #include <sys/kinfo.h>
  34 #include <sys/param.h>
  35 #include <sys/socket.h>
  36 #include <sys/time.h>
  37
  38 #include <net/ethernet.h>
  39 #include <net/if.h>
  40 #include <net/if_var.h>
  41 #include <net/if_dl.h>
  42 #include <net/if_types.h>
  43 #include <net/route.h>
  44
  45 #include <netinet/in.h>
  46 #include <netipx/ipx.h>
  47 #include <netgraph/socket/ng_socket.h>
  48
  49 #include <netproto/mpls/mpls.h>
  50
  51 #include <sys/sysctl.h>
  52
  53 #include <arpa/inet.h>
  54 #include <libutil.h>
  55 #include <netdb.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60 #include <err.h>
  61 #include <time.h>
  62 #include <kinfo.h>
  63 #include "netstat.h"
  64
  65 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
  66
  67
  68 /* alignment constraint for routing socket */
  69 #define ROUNDUP(a) \
  70        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
  71 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
  72
  73 /*
  74  * Definitions for showing gateway flags.
  75  */
  76 struct bits {
  77         u_long  b_mask;
  78         char    b_val;
  79 } bits[] = {
  80         { RTF_UP,       'U' },
  81         { RTF_GATEWAY,  'G' },
  82         { RTF_HOST,     'H' },
  83         { RTF_REJECT,   'R' },
  84         { RTF_DYNAMIC,  'D' },
  85         { RTF_MODIFIED, 'M' },
  86         { RTF_DONE,     'd' }, /* Completed -- for routing messages only */
  87         { RTF_CLONING,  'C' },
  88         { RTF_XRESOLVE, 'X' },
  89         { RTF_LLINFO,   'L' },
  90         { RTF_STATIC,   'S' },
  91         { RTF_PROTO1,   '1' },
  92         { RTF_PROTO2,   '2' },
  93         { RTF_WASCLONED,'W' },
  94         { RTF_PRCLONING,'c' },
  95         { RTF_PROTO3,   '3' },
  96         { RTF_BLACKHOLE,'B' },
  97         { RTF_BROADCAST,'b' },
  98         { RTF_MPLSOPS,  'm' },
  99         { 0, 0 }
 100 };
 101
 102 typedef union {
 103         long    dummy;          /* Helps align structure. */
 104         struct  sockaddr u_sa;
 105         u_short u_data[128];
 106 } sa_u;
 107
 108 static sa_u pt_u;
 109
 110 int     do_rtent = 0;
 111 struct  rtentry rtentry;
 112 struct  radix_node rnode;
 113 struct  radix_mask rmask;
 114 struct  radix_node_head *rt_tables[AF_MAX+1];
 115
 116 int     NewTree = 0;
 117
 118 static struct sockaddr *kgetsa (struct sockaddr *);
 119 static void size_cols (int ef, struct radix_node *rn);
 120 static void size_cols_tree (struct radix_node *rn);
 121 static void size_cols_rtentry (struct rtentry *rt);
 122 static void p_tree (struct radix_node *);
 123 static void p_rtnode (void);
 124 static void ntreestuff (void);
 125 static void np_rtentry (struct rt_msghdr *);
 126 static void p_sockaddr (struct sockaddr *, struct sockaddr *, int, int);
 127 static const char *fmt_sockaddr (struct sockaddr *sa, struct sockaddr *mask,
 128                                  int flags);
 129 static void p_flags (int, const char *);
 130 static const char *fmt_flags(int f);
 131 static void p_rtentry (struct rtentry *);
 132 static u_long forgemask (u_long);
 133 static void domask (char *, u_long, u_long);
 134 static const char *labelops(struct rtentry *);
 135
 136 /*
 137  * Print routing tables.
 138  */
 139 void
 140 routepr(u_long rtree)
 141 {
 142         struct radix_node_head *rnh, head;
 143         int i;
 144
 145         printf("Routing tables\n");
 146
 147         if (Aflag == 0 && NewTree) {
 148                 ntreestuff();
 149         } else {
 150                 if (rtree == 0) {
 151                         printf("rt_tables: symbol not in namelist\n");
 152                         return;
 153                 }
 154                 if (cpuflag >= 0) {
 155                         /*
 156                          * Severe hack.
 157                          */
 158                         rtree += cpuflag * (AF_MAX + 1) * sizeof(void *);
 159                 }
 160                 if (kget(rtree, rt_tables) != 0)
 161                         return;
 162                 for (i = 0; i <= AF_MAX; i++) {
 163                         if ((rnh = rt_tables[i]) == NULL)
 164                                 continue;
 165                         if (kget(rnh, head) != 0)
 166                                 continue;
 167                         if (i == AF_UNSPEC) {
 168                                 if (Aflag && af == 0) {
 169                                         printf("Netmasks:\n");
 170                                         p_tree(head.rnh_treetop);
 171                                 }
 172                         } else if (af == AF_UNSPEC || af == i) {
 173                                 size_cols(i, head.rnh_treetop);
 174                                 pr_family(i);
 175                                 do_rtent = 1;
 176                                 pr_rthdr(i);
 177                                 p_tree(head.rnh_treetop);
 178                         }
 179                 }
 180         }
 181 }
 182
 183 /*
 184  * Print address family header before a section of the routing table.
 185  */
 186 void
 187 pr_family(int af1)
 188 {
 189         const char *afname;
 190
 191         switch (af1) {
 192         case AF_INET:
 193                 afname = "Internet";
 194                 break;
 195 #ifdef INET6
 196         case AF_INET6:
 197                 afname = "Internet6";
 198                 break;
 199 #endif /*INET6*/
 200         case AF_IPX:
 201                 afname = "IPX";
 202                 break;
 203         case AF_ISO:
 204                 afname = "ISO";
 205                 break;
 206         case AF_CCITT:
 207                 afname = "X.25";
 208                 break;
 209         case AF_NETGRAPH:
 210                 afname = "Netgraph";
 211                 break;
 212         case AF_MPLS:
 213                 afname = "MPLS";
 214                 break;
 215         default:
 216                 afname = NULL;
 217                 break;
 218         }
 219         if (afname)
 220                 printf("\n%s:\n", afname);
 221         else
 222                 printf("\nProtocol Family %d:\n", af1);
 223 }
 224
 225 /* column widths; each followed by one space */
 226 #ifndef INET6
 227 #define WID_DST_DEFAULT(af)     18      /* width of destination column */
 228 #define WID_GW_DEFAULT(af)      18      /* width of gateway column */
 229 #define WID_IF_DEFAULT(af)      (Wflag ? 8 : 6) /* width of netif column */
 230 #else
 231 #define WID_DST_DEFAULT(af) \
 232         ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
 233 #define WID_GW_DEFAULT(af) \
 234         ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
 235 #define WID_IF_DEFAULT(af)      ((af) == AF_INET6 ? 8 : (Wflag ? 8 :6))
 236 #endif /*INET6*/
 237
 238 static int wid_dst;
 239 static int wid_gw;
 240 static int wid_flags;
 241 static int wid_refs;
 242 static int wid_use;
 243 static int wid_mtu;
 244 static int wid_if;
 245 static int wid_expire;
 246 static int wid_mplslops;
 247 static int wid_msl;
 248 static int wid_iwmax;
 249 static int wid_iw;
 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         wid_iwmax = 5;
 265         wid_iw = 2;
 266
 267         if (Wflag)
 268                 size_cols_tree(rn);
 269 }
 270
 271 static void
 272 size_cols_tree(struct radix_node *rn)
 273 {
 274 again:
 275         if (kget(rn, rnode) != 0)
 276                 return;
 277         if (!(rnode.rn_flags & RNF_ACTIVE))
 278                 return;
 279         if (rnode.rn_bit < 0) {
 280                 if ((rnode.rn_flags & RNF_ROOT) == 0) {
 281                         if (kget(rn, rtentry) != 0)
 282                                 return;
 283                         size_cols_rtentry(&rtentry);
 284                 }
 285                 if ((rn = rnode.rn_dupedkey))
 286                         goto again;
 287         } else {
 288                 rn = rnode.rn_right;
 289                 size_cols_tree(rnode.rn_left);
 290                 size_cols_tree(rn);
 291         }
 292 }
 293
 294 static void
 295 size_cols_rtentry(struct rtentry *rt)
 296 {
 297         static struct ifnet ifnet, *lastif;
 298         struct rtentry parent;
 299         static char buffer[100];
 300         const char *bp;
 301         struct sockaddr *sa;
 302         sa_u addr, mask;
 303         int len;
 304
 305         /*
 306          * Don't print protocol-cloned routes unless -a.
 307          */
 308         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 309                 if (kget(rt->rt_parent, parent) != 0)
 310                         return;
 311                 if (parent.rt_flags & RTF_PRCLONING)
 312                         return;
 313         }
 314
 315         bzero(&addr, sizeof(addr));
 316         if ((sa = kgetsa(rt_key(rt))))
 317                 bcopy(sa, &addr, sa->sa_len);
 318         bzero(&mask, sizeof(mask));
 319         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 320                 bcopy(sa, &mask, sa->sa_len);
 321         bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
 322         len = strlen(bp);
 323         wid_dst = MAX(len, wid_dst);
 324
 325         bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
 326         len = strlen(bp);
 327         wid_gw = MAX(len, wid_gw);
 328
 329         bp = fmt_flags(rt->rt_flags);
 330         len = strlen(bp);
 331         wid_flags = MAX(len, wid_flags);
 332
 333         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 334                 len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
 335                 wid_refs = MAX(len, wid_refs);
 336                 len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
 337                 wid_use = MAX(len, wid_use);
 338                 if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
 339                         len = snprintf(buffer, sizeof(buffer),
 340                                        "%lu", rt->rt_rmx.rmx_mtu);
 341                         wid_mtu = MAX(len, wid_mtu);
 342                 }
 343         }
 344         if (rt->rt_ifp) {
 345                 if (rt->rt_ifp != lastif) {
 346                         if (kget(rt->rt_ifp, ifnet) == 0)
 347                                 len = strlen(ifnet.if_xname);
 348                         else
 349                                 len = strlen("---");
 350                         lastif = rt->rt_ifp;
 351                         wid_if = MAX(len, wid_if);
 352                 }
 353                 if (rt->rt_rmx.rmx_expire) {
 354                         time_t expire_time;
 355
 356                         if ((expire_time =
 357                             rt->rt_rmx.rmx_expire - time(NULL)) > 0) {
 358                                 snprintf(buffer, sizeof(buffer), "%d",
 359                                          (int)expire_time);
 360                                 wid_expire = MAX(len, wid_expire);
 361                         }
 362                 }
 363         }
 364         if (Wflag) {
 365                 if (rt->rt_shim[0] != NULL) {
 366                         len = strlen(labelops(rt));
 367                         wid_mplslops = MAX(len, wid_mplslops);
 368                 }
 369
 370                 if (rt->rt_rmx.rmx_msl) {
 371                         len = snprintf(buffer, sizeof(buffer),
 372                                        "%lu", rt->rt_rmx.rmx_msl);
 373                         wid_msl = MAX(len, wid_msl);
 374                 }
 375                 if (rt->rt_rmx.rmx_iwmaxsegs) {
 376                         len = snprintf(buffer, sizeof(buffer),
 377                                        "%lu", rt->rt_rmx.rmx_iwmaxsegs);
 378                         wid_iwmax = MAX(len, wid_iwmax);
 379                 }
 380                 if (rt->rt_rmx.rmx_iwcapsegs) {
 381                         len = snprintf(buffer, sizeof(buffer),
 382                                        "%lu", rt->rt_rmx.rmx_iwcapsegs);
 383                         wid_iw = MAX(len, wid_iw);
 384                 }
 385         }
 386 }
 387
 388
 389 /*
 390  * Print header for routing table columns.
 391  */
 392 void
 393 pr_rthdr(int af1)
 394 {
 395
 396         if (Aflag)
 397                 printf("%-8.8s ","Address");
 398         if (af1 == AF_INET || Wflag) {
 399                 if (Wflag) {
 400                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*.*s "
 401                                "%*s %-*s%*s %*s %*s\n",
 402                                 wid_dst,        wid_dst,        "Destination",
 403                                 wid_gw,         wid_gw,         "Gateway",
 404                                 wid_flags,      wid_flags,      "Flags",
 405                                 wid_refs,       wid_refs,       "Refs",
 406                                 wid_use,        wid_use,        "Use",
 407                                 wid_mtu,        wid_mtu,        "Mtu",
 408                                 wid_if,         wid_if,         "Netif",
 409                                 wid_expire,                     "Expire",
 410                                 wid_mplslops,                   "Labelops",
 411                                 wid_msl,                        "Msl",
 412                                 wid_iwmax,                      "IWmax",
 413                                 wid_iw,                         "IW");
 414                 } else {
 415                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*s\n",
 416                                 wid_dst,        wid_dst,        "Destination",
 417                                 wid_gw,         wid_gw,         "Gateway",
 418                                 wid_flags,      wid_flags,      "Flags",
 419                                 wid_refs,       wid_refs,       "Refs",
 420                                 wid_use,        wid_use,        "Use",
 421                                 wid_if,         wid_if,         "Netif",
 422                                 wid_expire,                     "Expire");
 423                 }
 424         } else {
 425                 printf("%-*.*s %-*.*s %-*.*s  %*.*s %*s\n",
 426                         wid_dst,        wid_dst,        "Destination",
 427                         wid_gw,         wid_gw,         "Gateway",
 428                         wid_flags,      wid_flags,      "Flags",
 429                         wid_if,         wid_if,         "Netif",
 430                         wid_expire,                     "Expire");
 431         }
 432 }
 433
 434 static struct sockaddr *
 435 kgetsa(struct sockaddr *dst)
 436 {
 437
 438         if (kget(dst, pt_u.u_sa) != 0)
 439                 return (NULL);
 440         if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
 441                 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
 442         return (&pt_u.u_sa);
 443 }
 444
 445 static void
 446 p_tree(struct radix_node *rn)
 447 {
 448
 449 again:
 450         if (kget(rn, rnode) != 0)
 451                 return;
 452         if (!(rnode.rn_flags & RNF_ACTIVE))
 453                 return;
 454         if (rnode.rn_bit < 0) {
 455                 if (Aflag)
 456                         printf("%-8.8lx ", (u_long)rn);
 457                 if (rnode.rn_flags & RNF_ROOT) {
 458                         if (Aflag)
 459                                 printf("(root node)%s",
 460                                     rnode.rn_dupedkey ? " =>\n" : "\n");
 461                 } else if (do_rtent) {
 462                         if (kget(rn, rtentry) == 0) {
 463                                 p_rtentry(&rtentry);
 464                                 if (Aflag)
 465                                         p_rtnode();
 466                         }
 467                 } else {
 468                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
 469                                    NULL, 0, 44);
 470                         putchar('\n');
 471                 }
 472                 if ((rn = rnode.rn_dupedkey))
 473                         goto again;
 474         } else {
 475                 if (Aflag && do_rtent) {
 476                         printf("%-8.8lx ", (u_long)rn);
 477                         p_rtnode();
 478                 }
 479                 rn = rnode.rn_right;
 480                 p_tree(rnode.rn_left);
 481                 p_tree(rn);
 482         }
 483 }
 484
 485 char    nbuf[20];
 486
 487 static void
 488 p_rtnode(void)
 489 {
 490         struct radix_mask *rm = rnode.rn_mklist;
 491
 492         if (rnode.rn_bit < 0) {
 493                 if (rnode.rn_mask) {
 494                         printf("\t  mask ");
 495                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
 496                                    NULL, 0, -1);
 497                 } else if (rm == NULL)
 498                         return;
 499         } else {
 500                 sprintf(nbuf, "(%d)", rnode.rn_bit);
 501                 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
 502         }
 503         while (rm) {
 504                 if (kget(rm, rmask) != 0)
 505                         break;
 506                 sprintf(nbuf, " %d refs, ", rmask.rm_refs);
 507                 printf(" mk = %8.8lx {(%d),%s",
 508                         (u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
 509                 if (rmask.rm_flags & RNF_NORMAL) {
 510                         struct radix_node rnode_aux;
 511                         printf(" <normal>, ");
 512                         if (kget(rmask.rm_leaf, rnode_aux) == 0)
 513                                 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
 514                                     NULL, 0, -1);
 515                         else
 516                                 p_sockaddr(NULL, NULL, 0, -1);
 517                 } else
 518                     p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
 519                                 NULL, 0, -1);
 520                 putchar('}');
 521                 if ((rm = rmask.rm_next))
 522                         printf(" ->");
 523         }
 524         putchar('\n');
 525 }
 526
 527 static void
 528 ntreestuff(void)
 529 {
 530         size_t needed;
 531         int mib[7];
 532         int miblen;
 533         char *buf, *next, *lim;
 534         struct rt_msghdr *rtm;
 535
 536         mib[0] = CTL_NET;
 537         mib[1] = PF_ROUTE;
 538         mib[2] = 0;
 539         mib[3] = 0;
 540         mib[4] = NET_RT_DUMP;
 541         mib[5] = 0;
 542         if (cpuflag >= 0) {
 543                 mib[6] = cpuflag;
 544                 miblen = 7;
 545         } else {
 546                 miblen = 6;
 547         }
 548         if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) {
 549                 err(1, "sysctl: net.route.0.0.dump estimate");
 550         }
 551
 552         if ((buf = malloc(needed)) == NULL) {
 553                 err(2, "malloc(%lu)", (unsigned long)needed);
 554         }
 555         if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) {
 556                 err(1, "sysctl: net.route.0.0.dump");
 557         }
 558         lim  = buf + needed;
 559         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 560                 rtm = (struct rt_msghdr *)next;
 561                 np_rtentry(rtm);
 562         }
 563 }
 564
 565 static void
 566 np_rtentry(struct rt_msghdr *rtm)
 567 {
 568         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 569 #ifdef notdef
 570         static int masks_done, banner_printed;
 571 #endif
 572         static int old_af;
 573         int af1 = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
 574
 575 #ifdef notdef
 576         /* for the moment, netmasks are skipped over */
 577         if (!banner_printed) {
 578                 printf("Netmasks:\n");
 579                 banner_printed = 1;
 580         }
 581         if (masks_done == 0) {
 582                 if (rtm->rtm_addrs != RTA_DST ) {
 583                         masks_done = 1;
 584                         af1 = sa->sa_family;
 585                 }
 586         } else
 587 #endif
 588                 af1 = sa->sa_family;
 589         if (af1 != old_af) {
 590                 pr_family(af1);
 591                 old_af = af1;
 592         }
 593         if (rtm->rtm_addrs == RTA_DST)
 594                 p_sockaddr(sa, NULL, 0, 36);
 595         else {
 596                 p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
 597                 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 598                 p_sockaddr(sa, NULL, 0, 18);
 599         }
 600         p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
 601         putchar('\n');
 602 }
 603
 604 static void
 605 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
 606 {
 607         const char *cp;
 608
 609         cp = fmt_sockaddr(sa, mask, flags);
 610
 611         if (width < 0 )
 612                 printf("%s ", cp);
 613         else {
 614                 if (numeric_addr)
 615                         printf("%-*s ", width, cp);
 616                 else
 617                         printf("%-*.*s ", width, width, cp);
 618         }
 619 }
 620
 621 static const char *
 622 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
 623 {
 624         static char workbuf[128];
 625         const char *cp = workbuf;
 626
 627         if (sa == NULL)
 628                 return ("null");
 629
 630         switch(sa->sa_family) {
 631         case AF_INET:
 632             {
 633                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 634
 635                 if ((sin->sin_addr.s_addr == INADDR_ANY) &&
 636                         mask &&
 637                         ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
 638                                 ==0L)
 639                                 cp = "default" ;
 640                 else if (flags & RTF_HOST)
 641                         cp = routename(sin->sin_addr.s_addr);
 642                 else if (mask)
 643                         cp = netname(sin->sin_addr.s_addr,
 644                                      ntohl(((struct sockaddr_in *)mask)
 645                                            ->sin_addr.s_addr));
 646                 else
 647                         cp = netname(sin->sin_addr.s_addr, 0L);
 648                 break;
 649             }
 650
 651 #ifdef INET6
 652         case AF_INET6:
 653             {
 654                 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
 655                 struct in6_addr *in6 = &sa6->sin6_addr;
 656
 657                 /*
 658                  * XXX: This is a special workaround for KAME kernels.
 659                  * sin6_scope_id field of SA should be set in the future.
 660                  */
 661                 if (IN6_IS_ADDR_LINKLOCAL(in6) ||
 662                     IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
 663                     /* XXX: override is ok? */
 664                     sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
 665                     *(u_short *)&in6->s6_addr[2] = 0;
 666                 }
 667
 668                 if (flags & RTF_HOST)
 669                     cp = routename6(sa6);
 670                 else if (mask)
 671                     cp = netname6(sa6,
 672                                   &((struct sockaddr_in6 *)mask)->sin6_addr);
 673                 else {
 674                     cp = netname6(sa6, NULL);
 675                 }
 676                 break;
 677             }
 678 #endif /*INET6*/
 679
 680         case AF_IPX:
 681             {
 682                 struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
 683                 if (ipx_nullnet(satoipx_addr(work)))
 684                         cp = "default";
 685                 else
 686                         cp = ipx_print(sa);
 687                 break;
 688             }
 689         case AF_NETGRAPH:
 690             {
 691                 printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
 692                 break;
 693             }
 694         case AF_LINK:
 695             {
 696                 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
 697
 698                 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
 699                     sdl->sdl_slen == 0)
 700                         (void) sprintf(workbuf, "link#%d", sdl->sdl_index);
 701                 else
 702                         switch (sdl->sdl_type) {
 703
 704                         case IFT_ETHER:
 705                         case IFT_L2VLAN:
 706                         case IFT_CARP:
 707                                 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 708                                         cp = ether_ntoa((struct ether_addr *)
 709                                             (sdl->sdl_data + sdl->sdl_nlen));
 710                                         break;
 711                                 }
 712                                 /* FALLTHROUGH */
 713                         default:
 714                                 cp = link_ntoa(sdl);
 715                                 break;
 716                         }
 717                 break;
 718             }
 719
 720         case AF_MPLS:
 721             {
 722                 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
 723
 724                 (void) sprintf(workbuf, "%d", ntohl(smpls->smpls_label));
 725                 break;
 726             }
 727
 728         default:
 729             {
 730                 u_char *s = (u_char *)sa->sa_data, *slim;
 731                 char *cq, *cqlim;
 732
 733                 cq = workbuf;
 734                 slim =  sa->sa_len + (u_char *) sa;
 735                 cqlim = cq + sizeof(workbuf) - 6;
 736                 cq += sprintf(cq, "(%d)", sa->sa_family);
 737                 while (s < slim && cq < cqlim) {
 738                         cq += sprintf(cq, " %02x", *s++);
 739                         if (s < slim)
 740                             cq += sprintf(cq, "%02x", *s++);
 741                 }
 742                 cp = workbuf;
 743             }
 744         }
 745
 746         return (cp);
 747 }
 748
 749 static void
 750 p_flags(int f, const char *format)
 751 {
 752         printf(format, fmt_flags(f));
 753 }
 754
 755 static const char *
 756 fmt_flags(int f)
 757 {
 758         static char name[33];
 759         char *flags;
 760         struct bits *p = bits;
 761
 762         for (flags = name; p->b_mask; p++)
 763                 if (p->b_mask & f)
 764                         *flags++ = p->b_val;
 765         *flags = '\0';
 766         return (name);
 767 }
 768
 769 static void
 770 p_rtentry(struct rtentry *rt)
 771 {
 772         static struct ifnet ifnet, *lastif;
 773         struct rtentry parent;
 774         static char buffer[128];
 775         static char prettyname[128];
 776         struct sockaddr *sa;
 777         sa_u addr, mask;
 778
 779         /*
 780          * Don't print protocol-cloned routes unless -a.
 781          */
 782         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 783                 if (kget(rt->rt_parent, parent) != 0)
 784                         return;
 785                 if (parent.rt_flags & RTF_PRCLONING)
 786                         return;
 787         }
 788
 789         bzero(&addr, sizeof(addr));
 790         if ((sa = kgetsa(rt_key(rt))))
 791                 bcopy(sa, &addr, sa->sa_len);
 792         bzero(&mask, sizeof(mask));
 793         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 794                 bcopy(sa, &mask, sa->sa_len);
 795         p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
 796         p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
 797         snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
 798         p_flags(rt->rt_flags, buffer);
 799         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 800                 printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
 801                                      wid_use, rt->rt_use);
 802                 if (Wflag) {
 803                         if (rt->rt_rmx.rmx_mtu != 0)
 804                                 printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
 805                         else
 806                                 printf("%*s ", wid_mtu, "");
 807                 }
 808         }
 809         if (rt->rt_ifp) {
 810                 if (rt->rt_ifp != lastif) {
 811                         if (kget(rt->rt_ifp, ifnet) == 0)
 812                                 strlcpy(prettyname, ifnet.if_xname,
 813                                     sizeof(prettyname));
 814                         else
 815                                 strlcpy(prettyname, "---", sizeof(prettyname));
 816                         lastif = rt->rt_ifp;
 817                 }
 818                 printf("%*.*s", wid_if, wid_if, prettyname);
 819                 if (rt->rt_rmx.rmx_expire) {
 820                         time_t expire_time;
 821
 822                         if ((expire_time =
 823                             rt->rt_rmx.rmx_expire - time(NULL)) > 0)
 824                                 printf(" %*d", wid_expire, (int)expire_time);
 825                         else
 826                                 printf("%*s ", wid_expire, "");
 827                 } else {
 828                         printf("%*s ", wid_expire, "");
 829                 }
 830                 if (rt->rt_nodes[0].rn_dupedkey)
 831                         printf(" =>");
 832         }
 833         if (Wflag) {
 834                 if (rt->rt_shim[0] != NULL)
 835                         printf(" %-*s", wid_mplslops, labelops(rt));
 836                 else
 837                         printf(" %-*s", wid_mplslops, "");
 838                 if (rt->rt_rmx.rmx_msl != 0)
 839                         printf(" %*lu", wid_msl, rt->rt_rmx.rmx_msl);
 840                 else
 841                         printf("%*s ", wid_msl, "");
 842                 if (rt->rt_rmx.rmx_iwmaxsegs != 0)
 843                         printf(" %*lu", wid_iwmax, rt->rt_rmx.rmx_iwmaxsegs);
 844                 else
 845                         printf("%*s ", wid_iwmax, "");
 846                 if (rt->rt_rmx.rmx_iwcapsegs != 0)
 847                         printf(" %*lu", wid_iw, rt->rt_rmx.rmx_iwcapsegs);
 848                 else
 849                         printf("%*s ", wid_iw, "");
 850         }
 851         putchar('\n');
 852 }
 853
 854 char *
 855 routename(u_long in)
 856 {
 857         char *cp;
 858         static char line[MAXHOSTNAMELEN];
 859         struct hostent *hp;
 860
 861         cp = NULL;
 862         if (!numeric_addr) {
 863                 hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
 864                 if (hp) {
 865                         cp = hp->h_name;
 866                         trimdomain(cp, strlen(cp));
 867                 }
 868         }
 869         if (cp) {
 870                 strncpy(line, cp, sizeof(line) - 1);
 871                 line[sizeof(line) - 1] = '\0';
 872         } else {
 873 #define C(x)    ((x) & 0xff)
 874                 in = ntohl(in);
 875                 sprintf(line, "%lu.%lu.%lu.%lu",
 876                     C(in >> 24), C(in >> 16), C(in >> 8), C(in));
 877         }
 878         return (line);
 879 }
 880
 881 static u_long
 882 forgemask(u_long a)
 883 {
 884         u_long m;
 885
 886         if (IN_CLASSA(a))
 887                 m = IN_CLASSA_NET;
 888         else if (IN_CLASSB(a))
 889                 m = IN_CLASSB_NET;
 890         else
 891                 m = IN_CLASSC_NET;
 892         return (m);
 893 }
 894
 895 static void
 896 domask(char *dst, u_long addr, u_long mask)
 897 {
 898         int b, i;
 899
 900         if (!mask || (forgemask(addr) == mask)) {
 901                 *dst = '\0';
 902                 return;
 903         }
 904         i = 0;
 905         for (b = 0; b < 32; b++)
 906                 if (mask & (1 << b)) {
 907                         int bb;
 908
 909                         i = b;
 910                         for (bb = b+1; bb < 32; bb++)
 911                                 if (!(mask & (1 << bb))) {
 912                                         i = -1; /* noncontig */
 913                                         break;
 914                                 }
 915                         break;
 916                 }
 917         if (i == -1)
 918                 sprintf(dst, "&0x%lx", mask);
 919         else
 920                 sprintf(dst, "/%d", 32-i);
 921 }
 922
 923 /*
 924  * Return the name of the network whose address is given.
 925  * The address is assumed to be that of a net or subnet, not a host.
 926  */
 927 char *
 928 netname(u_long in, u_long mask)
 929 {
 930         char *cp = NULL;
 931         static char line[MAXHOSTNAMELEN];
 932         struct netent *np = NULL;
 933         u_long dmask;
 934         u_long i;
 935
 936 #define NSHIFT(m) (                                                     \
 937         (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :                       \
 938         (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :                       \
 939         (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :                       \
 940         0)
 941
 942         i = ntohl(in);
 943         dmask = forgemask(i);
 944         if (!numeric_addr && i) {
 945                 np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
 946                 if (np == NULL && mask == 0)
 947                         np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
 948                 if (np != NULL) {
 949                         cp = np->n_name;
 950                         trimdomain(cp, strlen(cp));
 951                 }
 952         }
 953 #undef NSHIFT
 954         if (cp != NULL) {
 955                 strncpy(line, cp, sizeof(line) - 1);
 956                 line[sizeof(line) - 1] = '\0';
 957         } else {
 958                 if (mask <= IN_CLASSA_NET &&
 959                         (i & IN_CLASSA_HOST) == 0) {
 960                                 sprintf(line, "%lu", C(i >> 24));
 961                 } else if (mask <= IN_CLASSB_NET &&
 962                         (i & IN_CLASSB_HOST) == 0) {
 963                                 sprintf(line, "%lu.%lu",
 964                                         C(i >> 24), C(i >> 16));
 965                 } else if (mask <= IN_CLASSC_NET &&
 966                         (i & IN_CLASSC_HOST) == 0) {
 967                                 sprintf(line, "%lu.%lu.%lu",
 968                                         C(i >> 24), C(i >> 16), C(i >> 8));
 969                 } else {
 970                         sprintf(line, "%lu.%lu.%lu.%lu",
 971                                 C(i >> 24), C(i >> 16), C(i >> 8), C(i));
 972                 }
 973         }
 974         domask(line + strlen(line), i, mask);
 975         return (line);
 976 }
 977
 978 #ifdef INET6
 979 const char *
 980 netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
 981 {
 982         static char line[MAXHOSTNAMELEN];
 983         u_char *p = (u_char *)mask;
 984         u_char *lim;
 985         int masklen, illegal = 0, flag = NI_WITHSCOPEID;
 986
 987         if (mask) {
 988                 for (masklen = 0, lim = p + 16; p < lim; p++) {
 989                         switch (*p) {
 990                          case 0xff:
 991                                  masklen += 8;
 992                                  break;
 993                          case 0xfe:
 994                                  masklen += 7;
 995                                  break;
 996                          case 0xfc:
 997                                  masklen += 6;
 998                                  break;
 999                          case 0xf8:
1000                                  masklen += 5;
1001                                  break;
1002                          case 0xf0:
1003                                  masklen += 4;
1004                                  break;
1005                          case 0xe0:
1006                                  masklen += 3;
1007                                  break;
1008                          case 0xc0:
1009                                  masklen += 2;
1010                                  break;
1011                          case 0x80:
1012                                  masklen += 1;
1013                                  break;
1014                          case 0x00:
1015                                  break;
1016                          default:
1017                                  illegal ++;
1018                                  break;
1019                         }
1020                 }
1021                 if (illegal)
1022                         fprintf(stderr, "illegal prefixlen\n");
1023         }
1024         else
1025                 masklen = 128;
1026
1027         if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
1028                 return("default");
1029
1030         if (numeric_addr)
1031                 flag |= NI_NUMERICHOST;
1032         getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
1033                     NULL, 0, flag);
1034
1035         if (numeric_addr)
1036                 sprintf(&line[strlen(line)], "/%d", masklen);
1037
1038         return line;
1039 }
1040
1041 char *
1042 routename6(struct sockaddr_in6 *sa6)
1043 {
1044         static char line[MAXHOSTNAMELEN];
1045         int flag = NI_WITHSCOPEID;
1046         /* use local variable for safety */
1047         struct sockaddr_in6 sa6_local;
1048
1049         sa6_local.sin6_family = AF_INET6;
1050         sa6_local.sin6_len = sizeof(sa6_local);
1051         sa6_local.sin6_addr = sa6->sin6_addr;
1052         sa6_local.sin6_scope_id = sa6->sin6_scope_id;
1053
1054         if (numeric_addr)
1055                 flag |= NI_NUMERICHOST;
1056
1057         getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
1058                     line, sizeof(line), NULL, 0, flag);
1059
1060         return line;
1061 }
1062 #endif /*INET6*/
1063
1064 /*
1065  * Print routing statistics
1066  */
1067 void
1068 rt_stats(void)
1069 {
1070         struct rtstatistics rts;
1071         int error = 0;
1072
1073         error = kinfo_get_net_rtstatistics(&rts);
1074         if (error) {
1075                 printf("routing: could not retrieve statistics\n");
1076                 return;
1077         }
1078         printf("routing:\n");
1079
1080 #define p(f, m) if (rts.f || sflag <= 1) \
1081         printf(m, rts.f, plural(rts.f))
1082
1083         p(rts_badredirect, "\t%lu bad routing redirect%s\n");
1084         p(rts_dynamic, "\t%lu dynamically created route%s\n");
1085         p(rts_newgateway, "\t%lu new gateway%s due to redirects\n");
1086         p(rts_unreach, "\t%lu destination%s found unreachable\n");
1087         p(rts_wildcard, "\t%lu use%s of a wildcard route\n");
1088 #undef p
1089 }
1090
1091 char *
1092 ipx_print(struct sockaddr *sa)
1093 {
1094         u_short port;
1095         struct servent *sp = NULL;
1096         const char *net = "", *host = "";
1097         char *p;
1098         u_char *q;
1099         struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
1100         static char mybuf[50];
1101         char cport[10], chost[15], cnet[15];
1102
1103         port = ntohs(work.x_port);
1104
1105         if (ipx_nullnet(work) && ipx_nullhost(work)) {
1106
1107                 if (port) {
1108                         if (sp)
1109                                 sprintf(mybuf, "*.%s", sp->s_name);
1110                         else
1111                                 sprintf(mybuf, "*.%x", port);
1112                 } else
1113                         sprintf(mybuf, "*.*");
1114
1115                 return (mybuf);
1116         }
1117
1118         if (ipx_wildnet(work))
1119                 net = "any";
1120         else if (ipx_nullnet(work))
1121                 net = "*";
1122         else {
1123                 q = work.x_net.c_net;
1124                 sprintf(cnet, "%02x%02x%02x%02x",
1125                         q[0], q[1], q[2], q[3]);
1126                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
1127                         continue;
1128                 net = p;
1129         }
1130
1131         if (ipx_wildhost(work))
1132                 host = "any";
1133         else if (ipx_nullhost(work))
1134                 host = "*";
1135         else {
1136                 q = work.x_host.c_host;
1137                 sprintf(chost, "%02x%02x%02x%02x%02x%02x",
1138                         q[0], q[1], q[2], q[3], q[4], q[5]);
1139                 for (p = chost; *p == '0' && p < chost + 12; p++)
1140                         continue;
1141                 host = p;
1142         }
1143
1144         if (port) {
1145                 if (strcmp(host, "*") == 0)
1146                         host = "";
1147                 if (sp)
1148                         snprintf(cport, sizeof(cport),
1149                                 "%s%s", *host ? "." : "", sp->s_name);
1150                 else
1151                         snprintf(cport, sizeof(cport),
1152                                 "%s%x", *host ? "." : "", port);
1153         } else
1154                 *cport = 0;
1155
1156         snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
1157         return(mybuf);
1158 }
1159
1160 char *
1161 ipx_phost(struct sockaddr *sa)
1162 {
1163         struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
1164         struct sockaddr_ipx work;
1165         static union ipx_net ipx_zeronet;
1166         char *p;
1167
1168         work = *sipx;
1169         work.sipx_addr.x_port = 0;
1170         work.sipx_addr.x_net = ipx_zeronet;
1171         p = ipx_print((struct sockaddr *)&work);
1172         if (strncmp("*.", p, 2) == 0) p += 2;
1173
1174         return(p);
1175 }
1176
1177 void
1178 upHex(char *p0)
1179 {
1180         char *p = p0;
1181
1182         for (; *p; p++)
1183                 switch (*p) {
1184
1185                 case 'a':
1186                 case 'b':
1187                 case 'c':
1188                 case 'd':
1189                 case 'e':
1190                 case 'f':
1191                         *p += ('A' - 'a');
1192                         break;
1193                 }
1194 }
1195
1196 static const char *
1197 labelops(struct rtentry *rt)
1198 {
1199         const char *lops[] = { "push", "pop", "swap", "pop all" };
1200         static char buffer[100];
1201         char *cp = buffer;
1202         struct sockaddr_mpls *smpls;
1203         int i;
1204
1205         for (i=0; i<MPLS_MAXLOPS; ++i) {
1206
1207                 if (rt->rt_shim[i] == NULL)
1208                         break;
1209                 if (i>0) {
1210                         cp += snprintf(cp,
1211                                        sizeof(buffer) - (cp - buffer),
1212                                        ", ");
1213                 }
1214                 smpls = (struct sockaddr_mpls *)kgetsa(rt->rt_shim[i]);
1215                 if (smpls->smpls_op != MPLSLOP_POP &&
1216                     smpls->smpls_op != MPLSLOP_POPALL){
1217                         cp += snprintf(cp,
1218                                        sizeof(buffer) - (cp - buffer),
1219                                        "%s %d",
1220                                        lops[smpls->smpls_op - 1],
1221                                        ntohl(smpls->smpls_label));
1222                 } else {
1223                         cp += snprintf(cp,
1224                                        sizeof(buffer) - (cp - buffer),
1225                                        "%s",
1226                                        lops[smpls->smpls_op - 1]);
1227                 }
1228         }
1229
1230         return (buffer);
1231 }