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                 if (kget(rtree, rt_tables) != 0)
 165                         return;
 166                 for (i = 0; i <= AF_MAX; i++) {
 167                         if ((rnh = rt_tables[i]) == NULL)
 168                                 continue;
 169                         if (kget(rnh, head) != 0)
 170                                 continue;
 171                         if (i == AF_UNSPEC) {
 172                                 if (Aflag && af == 0) {
 173                                         printf("Netmasks:\n");
 174                                         p_tree(head.rnh_treetop);
 175                                 }
 176                         } else if (af == AF_UNSPEC || af == i) {
 177                                 size_cols(i, head.rnh_treetop);
 178                                 pr_family(i);
 179                                 do_rtent = 1;
 180                                 pr_rthdr(i);
 181                                 p_tree(head.rnh_treetop);
 182                         }
 183                 }
 184         }
 185 }
 186
 187 /*
 188  * Print address family header before a section of the routing table.
 189  */
 190 void
 191 pr_family(int af1)
 192 {
 193         const char *afname;
 194
 195         switch (af1) {
 196         case AF_INET:
 197                 afname = "Internet";
 198                 break;
 199 #ifdef INET6
 200         case AF_INET6:
 201                 afname = "Internet6";
 202                 break;
 203 #endif /*INET6*/
 204         case AF_IPX:
 205                 afname = "IPX";
 206                 break;
 207         case AF_ISO:
 208                 afname = "ISO";
 209                 break;
 210         case AF_CCITT:
 211                 afname = "X.25";
 212                 break;
 213         case AF_NETGRAPH:
 214                 afname = "Netgraph";
 215                 break;
 216         case AF_MPLS:
 217                 afname = "MPLS";
 218                 break;
 219         default:
 220                 afname = NULL;
 221                 break;
 222         }
 223         if (afname)
 224                 printf("\n%s:\n", afname);
 225         else
 226                 printf("\nProtocol Family %d:\n", af1);
 227 }
 228
 229 /* column widths; each followed by one space */
 230 #ifndef INET6
 231 #define WID_DST_DEFAULT(af)     18      /* width of destination column */
 232 #define WID_GW_DEFAULT(af)      18      /* width of gateway column */
 233 #define WID_IF_DEFAULT(af)      (Wflag ? 8 : 6) /* width of netif column */
 234 #else
 235 #define WID_DST_DEFAULT(af) \
 236         ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
 237 #define WID_GW_DEFAULT(af) \
 238         ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
 239 #define WID_IF_DEFAULT(af)      ((af) == AF_INET6 ? 8 : (Wflag ? 8 :6))
 240 #endif /*INET6*/
 241
 242 static int wid_dst;
 243 static int wid_gw;
 244 static int wid_flags;
 245 static int wid_refs;
 246 static int wid_use;
 247 static int wid_mtu;
 248 static int wid_if;
 249 static int wid_expire;
 250 static int wid_mplslops;
 251 static int wid_msl;
 252 static int wid_iwmax;
 253 static int wid_iw;
 254
 255 static void
 256 size_cols(int ef, struct radix_node *rn)
 257 {
 258         wid_dst = WID_DST_DEFAULT(ef);
 259         wid_gw = WID_GW_DEFAULT(ef);
 260         wid_flags = 6;
 261         wid_refs = 6;
 262         wid_use = 8;
 263         wid_mtu = 6;
 264         wid_if = WID_IF_DEFAULT(ef);
 265         wid_expire = 6;
 266         wid_mplslops = 7;
 267         wid_msl = 7;
 268         wid_iwmax = 5;
 269         wid_iw = 2;
 270
 271         if (Wflag)
 272                 size_cols_tree(rn);
 273 }
 274
 275 static void
 276 size_cols_tree(struct radix_node *rn)
 277 {
 278 again:
 279         if (kget(rn, rnode) != 0)
 280                 return;
 281         if (!(rnode.rn_flags & RNF_ACTIVE))
 282                 return;
 283         if (rnode.rn_bit < 0) {
 284                 if ((rnode.rn_flags & RNF_ROOT) == 0) {
 285                         if (kget(rn, rtentry) != 0)
 286                                 return;
 287                         size_cols_rtentry(&rtentry);
 288                 }
 289                 if ((rn = rnode.rn_dupedkey))
 290                         goto again;
 291         } else {
 292                 rn = rnode.rn_right;
 293                 size_cols_tree(rnode.rn_left);
 294                 size_cols_tree(rn);
 295         }
 296 }
 297
 298 static void
 299 size_cols_rtentry(struct rtentry *rt)
 300 {
 301         static struct ifnet ifnet, *lastif;
 302         struct rtentry parent;
 303         static char buffer[100];
 304         const char *bp;
 305         struct sockaddr *sa;
 306         sa_u addr, mask;
 307         int len;
 308
 309         /*
 310          * Don't print protocol-cloned routes unless -a.
 311          */
 312         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 313                 if (kget(rt->rt_parent, parent) != 0)
 314                         return;
 315                 if (parent.rt_flags & RTF_PRCLONING)
 316                         return;
 317         }
 318
 319         bzero(&addr, sizeof(addr));
 320         if ((sa = kgetsa(rt_key(rt))))
 321                 bcopy(sa, &addr, sa->sa_len);
 322         bzero(&mask, sizeof(mask));
 323         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 324                 bcopy(sa, &mask, sa->sa_len);
 325         bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
 326         len = strlen(bp);
 327         wid_dst = MAX(len, wid_dst);
 328
 329         bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
 330         len = strlen(bp);
 331         wid_gw = MAX(len, wid_gw);
 332
 333         bp = fmt_flags(rt->rt_flags);
 334         len = strlen(bp);
 335         wid_flags = MAX(len, wid_flags);
 336
 337         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 338                 len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
 339                 wid_refs = MAX(len, wid_refs);
 340                 len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
 341                 wid_use = MAX(len, wid_use);
 342                 if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
 343                         len = snprintf(buffer, sizeof(buffer),
 344                                        "%lu", rt->rt_rmx.rmx_mtu);
 345                         wid_mtu = MAX(len, wid_mtu);
 346                 }
 347         }
 348         if (rt->rt_ifp) {
 349                 if (rt->rt_ifp != lastif) {
 350                         if (kget(rt->rt_ifp, ifnet) == 0)
 351                                 len = strlen(ifnet.if_xname);
 352                         else
 353                                 len = strlen("---");
 354                         lastif = rt->rt_ifp;
 355                         wid_if = MAX(len, wid_if);
 356                 }
 357                 if (rt->rt_rmx.rmx_expire) {
 358                         time_t expire_time;
 359
 360                         if ((expire_time =
 361                             rt->rt_rmx.rmx_expire - time(NULL)) > 0) {
 362                                 snprintf(buffer, sizeof(buffer), "%d",
 363                                          (int)expire_time);
 364                                 wid_expire = MAX(len, wid_expire);
 365                         }
 366                 }
 367         }
 368         if (Wflag) {
 369                 if (rt->rt_shim[0] != NULL) {
 370                         len = strlen(labelops(rt));
 371                         wid_mplslops = MAX(len, wid_mplslops);
 372                 }
 373
 374                 if (rt->rt_rmx.rmx_msl) {
 375                         len = snprintf(buffer, sizeof(buffer),
 376                                        "%lu", rt->rt_rmx.rmx_msl);
 377                         wid_msl = MAX(len, wid_msl);
 378                 }
 379                 if (rt->rt_rmx.rmx_iwmaxsegs) {
 380                         len = snprintf(buffer, sizeof(buffer),
 381                                        "%lu", rt->rt_rmx.rmx_iwmaxsegs);
 382                         wid_iwmax = MAX(len, wid_iwmax);
 383                 }
 384                 if (rt->rt_rmx.rmx_iwcapsegs) {
 385                         len = snprintf(buffer, sizeof(buffer),
 386                                        "%lu", rt->rt_rmx.rmx_iwcapsegs);
 387                         wid_iw = MAX(len, wid_iw);
 388                 }
 389         }
 390 }
 391
 392
 393 /*
 394  * Print header for routing table columns.
 395  */
 396 void
 397 pr_rthdr(int af1)
 398 {
 399
 400         if (Aflag)
 401                 printf("%-8.8s ","Address");
 402         if (af1 == AF_INET || Wflag) {
 403                 if (Wflag) {
 404                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*.*s "
 405                                "%*s %-*s%*s %*s %*s\n",
 406                                 wid_dst,        wid_dst,        "Destination",
 407                                 wid_gw,         wid_gw,         "Gateway",
 408                                 wid_flags,      wid_flags,      "Flags",
 409                                 wid_refs,       wid_refs,       "Refs",
 410                                 wid_use,        wid_use,        "Use",
 411                                 wid_mtu,        wid_mtu,        "Mtu",
 412                                 wid_if,         wid_if,         "Netif",
 413                                 wid_expire,                     "Expire",
 414                                 wid_mplslops,                   "Labelops",
 415                                 wid_msl,                        "Msl",
 416                                 wid_iwmax,                      "IWmax",
 417                                 wid_iw,                         "IW");
 418                 } else {
 419                         printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*s\n",
 420                                 wid_dst,        wid_dst,        "Destination",
 421                                 wid_gw,         wid_gw,         "Gateway",
 422                                 wid_flags,      wid_flags,      "Flags",
 423                                 wid_refs,       wid_refs,       "Refs",
 424                                 wid_use,        wid_use,        "Use",
 425                                 wid_if,         wid_if,         "Netif",
 426                                 wid_expire,                     "Expire");
 427                 }
 428         } else {
 429                 printf("%-*.*s %-*.*s %-*.*s  %*.*s %*s\n",
 430                         wid_dst,        wid_dst,        "Destination",
 431                         wid_gw,         wid_gw,         "Gateway",
 432                         wid_flags,      wid_flags,      "Flags",
 433                         wid_if,         wid_if,         "Netif",
 434                         wid_expire,                     "Expire");
 435         }
 436 }
 437
 438 static struct sockaddr *
 439 kgetsa(struct sockaddr *dst)
 440 {
 441
 442         if (kget(dst, pt_u.u_sa) != 0)
 443                 return (NULL);
 444         if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
 445                 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
 446         return (&pt_u.u_sa);
 447 }
 448
 449 static void
 450 p_tree(struct radix_node *rn)
 451 {
 452
 453 again:
 454         if (kget(rn, rnode) != 0)
 455                 return;
 456         if (!(rnode.rn_flags & RNF_ACTIVE))
 457                 return;
 458         if (rnode.rn_bit < 0) {
 459                 if (Aflag)
 460                         printf("%-8.8lx ", (u_long)rn);
 461                 if (rnode.rn_flags & RNF_ROOT) {
 462                         if (Aflag)
 463                                 printf("(root node)%s",
 464                                     rnode.rn_dupedkey ? " =>\n" : "\n");
 465                 } else if (do_rtent) {
 466                         if (kget(rn, rtentry) == 0) {
 467                                 p_rtentry(&rtentry);
 468                                 if (Aflag)
 469                                         p_rtnode();
 470                         }
 471                 } else {
 472                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
 473                                    NULL, 0, 44);
 474                         putchar('\n');
 475                 }
 476                 if ((rn = rnode.rn_dupedkey))
 477                         goto again;
 478         } else {
 479                 if (Aflag && do_rtent) {
 480                         printf("%-8.8lx ", (u_long)rn);
 481                         p_rtnode();
 482                 }
 483                 rn = rnode.rn_right;
 484                 p_tree(rnode.rn_left);
 485                 p_tree(rn);
 486         }
 487 }
 488
 489 char    nbuf[20];
 490
 491 static void
 492 p_rtnode(void)
 493 {
 494         struct radix_mask *rm = rnode.rn_mklist;
 495
 496         if (rnode.rn_bit < 0) {
 497                 if (rnode.rn_mask) {
 498                         printf("\t  mask ");
 499                         p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
 500                                    NULL, 0, -1);
 501                 } else if (rm == NULL)
 502                         return;
 503         } else {
 504                 sprintf(nbuf, "(%d)", rnode.rn_bit);
 505                 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
 506         }
 507         while (rm) {
 508                 if (kget(rm, rmask) != 0)
 509                         break;
 510                 sprintf(nbuf, " %d refs, ", rmask.rm_refs);
 511                 printf(" mk = %8.8lx {(%d),%s",
 512                         (u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
 513                 if (rmask.rm_flags & RNF_NORMAL) {
 514                         struct radix_node rnode_aux;
 515                         printf(" <normal>, ");
 516                         if (kget(rmask.rm_leaf, rnode_aux) == 0)
 517                                 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
 518                                     NULL, 0, -1);
 519                         else
 520                                 p_sockaddr(NULL, NULL, 0, -1);
 521                 } else
 522                     p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
 523                                 NULL, 0, -1);
 524                 putchar('}');
 525                 if ((rm = rmask.rm_next))
 526                         printf(" ->");
 527         }
 528         putchar('\n');
 529 }
 530
 531 static void
 532 ntreestuff(void)
 533 {
 534         size_t needed;
 535         int mib[7];
 536         int miblen;
 537         char *buf, *next, *lim;
 538         struct rt_msghdr *rtm;
 539
 540         mib[0] = CTL_NET;
 541         mib[1] = PF_ROUTE;
 542         mib[2] = 0;
 543         mib[3] = 0;
 544         mib[4] = NET_RT_DUMP;
 545         mib[5] = 0;
 546         if (cpuflag >= 0) {
 547                 mib[6] = cpuflag;
 548                 miblen = 7;
 549         } else {
 550                 miblen = 6;
 551         }
 552         if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) {
 553                 err(1, "sysctl: net.route.0.0.dump estimate");
 554         }
 555
 556         if ((buf = malloc(needed)) == NULL) {
 557                 err(2, "malloc(%lu)", (unsigned long)needed);
 558         }
 559         if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) {
 560                 err(1, "sysctl: net.route.0.0.dump");
 561         }
 562         lim  = buf + needed;
 563         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 564                 rtm = (struct rt_msghdr *)next;
 565                 np_rtentry(rtm);
 566         }
 567 }
 568
 569 static void
 570 np_rtentry(struct rt_msghdr *rtm)
 571 {
 572         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 573 #ifdef notdef
 574         static int masks_done, banner_printed;
 575 #endif
 576         static int old_af;
 577         int af1 = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
 578
 579 #ifdef notdef
 580         /* for the moment, netmasks are skipped over */
 581         if (!banner_printed) {
 582                 printf("Netmasks:\n");
 583                 banner_printed = 1;
 584         }
 585         if (masks_done == 0) {
 586                 if (rtm->rtm_addrs != RTA_DST ) {
 587                         masks_done = 1;
 588                         af1 = sa->sa_family;
 589                 }
 590         } else
 591 #endif
 592                 af1 = sa->sa_family;
 593         if (af1 != old_af) {
 594                 pr_family(af1);
 595                 old_af = af1;
 596         }
 597         if (rtm->rtm_addrs == RTA_DST)
 598                 p_sockaddr(sa, NULL, 0, 36);
 599         else {
 600                 p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
 601                 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 602                 p_sockaddr(sa, NULL, 0, 18);
 603         }
 604         p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
 605         putchar('\n');
 606 }
 607
 608 static void
 609 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
 610 {
 611         const char *cp;
 612
 613         cp = fmt_sockaddr(sa, mask, flags);
 614
 615         if (width < 0 )
 616                 printf("%s ", cp);
 617         else {
 618                 if (numeric_addr)
 619                         printf("%-*s ", width, cp);
 620                 else
 621                         printf("%-*.*s ", width, width, cp);
 622         }
 623 }
 624
 625 static const char *
 626 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
 627 {
 628         static char workbuf[128];
 629         const char *cp = workbuf;
 630
 631         if (sa == NULL)
 632                 return ("null");
 633
 634         switch(sa->sa_family) {
 635         case AF_INET:
 636             {
 637                 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 638
 639                 if ((sin->sin_addr.s_addr == INADDR_ANY) &&
 640                         mask &&
 641                         ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
 642                                 ==0L)
 643                                 cp = "default" ;
 644                 else if (flags & RTF_HOST)
 645                         cp = routename(sin->sin_addr.s_addr);
 646                 else if (mask)
 647                         cp = netname(sin->sin_addr.s_addr,
 648                                      ntohl(((struct sockaddr_in *)mask)
 649                                            ->sin_addr.s_addr));
 650                 else
 651                         cp = netname(sin->sin_addr.s_addr, 0L);
 652                 break;
 653             }
 654
 655 #ifdef INET6
 656         case AF_INET6:
 657             {
 658                 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
 659                 struct in6_addr *in6 = &sa6->sin6_addr;
 660
 661                 /*
 662                  * XXX: This is a special workaround for KAME kernels.
 663                  * sin6_scope_id field of SA should be set in the future.
 664                  */
 665                 if (IN6_IS_ADDR_LINKLOCAL(in6) ||
 666                     IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
 667                     /* XXX: override is ok? */
 668                     sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
 669                     *(u_short *)&in6->s6_addr[2] = 0;
 670                 }
 671
 672                 if (flags & RTF_HOST)
 673                     cp = routename6(sa6);
 674                 else if (mask)
 675                     cp = netname6(sa6,
 676                                   &((struct sockaddr_in6 *)mask)->sin6_addr);
 677                 else {
 678                     cp = netname6(sa6, NULL);
 679                 }
 680                 break;
 681             }
 682 #endif /*INET6*/
 683
 684         case AF_IPX:
 685             {
 686                 struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
 687                 if (ipx_nullnet(satoipx_addr(work)))
 688                         cp = "default";
 689                 else
 690                         cp = ipx_print(sa);
 691                 break;
 692             }
 693         case AF_NETGRAPH:
 694             {
 695                 printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
 696                 break;
 697             }
 698         case AF_LINK:
 699             {
 700                 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
 701
 702                 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
 703                     sdl->sdl_slen == 0)
 704                         (void) sprintf(workbuf, "link#%d", sdl->sdl_index);
 705                 else
 706                         switch (sdl->sdl_type) {
 707
 708                         case IFT_ETHER:
 709                         case IFT_L2VLAN:
 710                         case IFT_CARP:
 711                                 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 712                                         cp = ether_ntoa((struct ether_addr *)
 713                                             (sdl->sdl_data + sdl->sdl_nlen));
 714                                         break;
 715                                 }
 716                                 /* FALLTHROUGH */
 717                         default:
 718                                 cp = link_ntoa(sdl);
 719                                 break;
 720                         }
 721                 break;
 722             }
 723
 724         case AF_MPLS:
 725             {
 726                 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
 727
 728                 (void) sprintf(workbuf, "%d", ntohl(smpls->smpls_label));
 729                 break;
 730             }
 731
 732         default:
 733             {
 734                 u_char *s = (u_char *)sa->sa_data, *slim;
 735                 char *cq, *cqlim;
 736
 737                 cq = workbuf;
 738                 slim =  sa->sa_len + (u_char *) sa;
 739                 cqlim = cq + sizeof(workbuf) - 6;
 740                 cq += sprintf(cq, "(%d)", sa->sa_family);
 741                 while (s < slim && cq < cqlim) {
 742                         cq += sprintf(cq, " %02x", *s++);
 743                         if (s < slim)
 744                             cq += sprintf(cq, "%02x", *s++);
 745                 }
 746                 cp = workbuf;
 747             }
 748         }
 749
 750         return (cp);
 751 }
 752
 753 static void
 754 p_flags(int f, const char *format)
 755 {
 756         printf(format, fmt_flags(f));
 757 }
 758
 759 static const char *
 760 fmt_flags(int f)
 761 {
 762         static char name[33];
 763         char *flags;
 764         struct bits *p = bits;
 765
 766         for (flags = name; p->b_mask; p++)
 767                 if (p->b_mask & f)
 768                         *flags++ = p->b_val;
 769         *flags = '\0';
 770         return (name);
 771 }
 772
 773 static void
 774 p_rtentry(struct rtentry *rt)
 775 {
 776         static struct ifnet ifnet, *lastif;
 777         struct rtentry parent;
 778         static char buffer[128];
 779         static char prettyname[128];
 780         struct sockaddr *sa;
 781         sa_u addr, mask;
 782
 783         /*
 784          * Don't print protocol-cloned routes unless -a.
 785          */
 786         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 787                 if (kget(rt->rt_parent, parent) != 0)
 788                         return;
 789                 if (parent.rt_flags & RTF_PRCLONING)
 790                         return;
 791         }
 792
 793         bzero(&addr, sizeof(addr));
 794         if ((sa = kgetsa(rt_key(rt))))
 795                 bcopy(sa, &addr, sa->sa_len);
 796         bzero(&mask, sizeof(mask));
 797         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 798                 bcopy(sa, &mask, sa->sa_len);
 799         p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
 800         p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
 801         snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
 802         p_flags(rt->rt_flags, buffer);
 803         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 804                 printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
 805                                      wid_use, rt->rt_use);
 806                 if (Wflag) {
 807                         if (rt->rt_rmx.rmx_mtu != 0)
 808                                 printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
 809                         else
 810                                 printf("%*s ", wid_mtu, "");
 811                 }
 812         }
 813         if (rt->rt_ifp) {
 814                 if (rt->rt_ifp != lastif) {
 815                         if (kget(rt->rt_ifp, ifnet) == 0)
 816                                 strlcpy(prettyname, ifnet.if_xname,
 817                                     sizeof(prettyname));
 818                         else
 819                                 strlcpy(prettyname, "---", sizeof(prettyname));
 820                         lastif = rt->rt_ifp;
 821                 }
 822                 printf("%*.*s", wid_if, wid_if, prettyname);
 823                 if (rt->rt_rmx.rmx_expire) {
 824                         time_t expire_time;
 825
 826                         if ((expire_time =
 827                             rt->rt_rmx.rmx_expire - time(NULL)) > 0)
 828                                 printf(" %*d", wid_expire, (int)expire_time);
 829                         else
 830                                 printf("%*s ", wid_expire, "");
 831                 } else {
 832                         printf("%*s ", wid_expire, "");
 833                 }
 834                 if (rt->rt_nodes[0].rn_dupedkey)
 835                         printf(" =>");
 836         }
 837         if (Wflag) {
 838                 if (rt->rt_shim[0] != NULL)
 839                         printf(" %-*s", wid_mplslops, labelops(rt));
 840                 else
 841                         printf(" %-*s", wid_mplslops, "");
 842                 if (rt->rt_rmx.rmx_msl != 0)
 843                         printf(" %*lu", wid_msl, rt->rt_rmx.rmx_msl);
 844                 else
 845                         printf("%*s ", wid_msl, "");
 846                 if (rt->rt_rmx.rmx_iwmaxsegs != 0)
 847                         printf(" %*lu", wid_iwmax, rt->rt_rmx.rmx_iwmaxsegs);
 848                 else
 849                         printf("%*s ", wid_iwmax, "");
 850                 if (rt->rt_rmx.rmx_iwcapsegs != 0)
 851                         printf(" %*lu", wid_iw, rt->rt_rmx.rmx_iwcapsegs);
 852                 else
 853                         printf("%*s ", wid_iw, "");
 854         }
 855         putchar('\n');
 856 }
 857
 858 char *
 859 routename(u_long in)
 860 {
 861         char *cp;
 862         static char line[MAXHOSTNAMELEN];
 863         struct hostent *hp;
 864
 865         cp = NULL;
 866         if (!numeric_addr) {
 867                 hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
 868                 if (hp) {
 869                         cp = hp->h_name;
 870                         trimdomain(cp, strlen(cp));
 871                 }
 872         }
 873         if (cp) {
 874                 strncpy(line, cp, sizeof(line) - 1);
 875                 line[sizeof(line) - 1] = '\0';
 876         } else {
 877 #define C(x)    ((x) & 0xff)
 878                 in = ntohl(in);
 879                 sprintf(line, "%lu.%lu.%lu.%lu",
 880                     C(in >> 24), C(in >> 16), C(in >> 8), C(in));
 881         }
 882         return (line);
 883 }
 884
 885 static u_long
 886 forgemask(u_long a)
 887 {
 888         u_long m;
 889
 890         if (IN_CLASSA(a))
 891                 m = IN_CLASSA_NET;
 892         else if (IN_CLASSB(a))
 893                 m = IN_CLASSB_NET;
 894         else
 895                 m = IN_CLASSC_NET;
 896         return (m);
 897 }
 898
 899 static void
 900 domask(char *dst, u_long addr, u_long mask)
 901 {
 902         int b, i;
 903
 904         if (!mask || (forgemask(addr) == mask)) {
 905                 *dst = '\0';
 906                 return;
 907         }
 908         i = 0;
 909         for (b = 0; b < 32; b++)
 910                 if (mask & (1 << b)) {
 911                         int bb;
 912
 913                         i = b;
 914                         for (bb = b+1; bb < 32; bb++)
 915                                 if (!(mask & (1 << bb))) {
 916                                         i = -1; /* noncontig */
 917                                         break;
 918                                 }
 919                         break;
 920                 }
 921         if (i == -1)
 922                 sprintf(dst, "&0x%lx", mask);
 923         else
 924                 sprintf(dst, "/%d", 32-i);
 925 }
 926
 927 /*
 928  * Return the name of the network whose address is given.
 929  * The address is assumed to be that of a net or subnet, not a host.
 930  */
 931 char *
 932 netname(u_long in, u_long mask)
 933 {
 934         char *cp = NULL;
 935         static char line[MAXHOSTNAMELEN];
 936         struct netent *np = NULL;
 937         u_long dmask;
 938         u_long i;
 939
 940 #define NSHIFT(m) (                                                     \
 941         (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :                       \
 942         (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :                       \
 943         (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :                       \
 944         0)
 945
 946         i = ntohl(in);
 947         dmask = forgemask(i);
 948         if (!numeric_addr && i) {
 949                 np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
 950                 if (np == NULL && mask == 0)
 951                         np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
 952                 if (np != NULL) {
 953                         cp = np->n_name;
 954                         trimdomain(cp, strlen(cp));
 955                 }
 956         }
 957 #undef NSHIFT
 958         if (cp != NULL) {
 959                 strncpy(line, cp, sizeof(line) - 1);
 960                 line[sizeof(line) - 1] = '\0';
 961         } else {
 962                 if (mask <= IN_CLASSA_NET &&
 963                         (i & IN_CLASSA_HOST) == 0) {
 964                                 sprintf(line, "%lu", C(i >> 24));
 965                 } else if (mask <= IN_CLASSB_NET &&
 966                         (i & IN_CLASSB_HOST) == 0) {
 967                                 sprintf(line, "%lu.%lu",
 968                                         C(i >> 24), C(i >> 16));
 969                 } else if (mask <= IN_CLASSC_NET &&
 970                         (i & IN_CLASSC_HOST) == 0) {
 971                                 sprintf(line, "%lu.%lu.%lu",
 972                                         C(i >> 24), C(i >> 16), C(i >> 8));
 973                 } else {
 974                         sprintf(line, "%lu.%lu.%lu.%lu",
 975                                 C(i >> 24), C(i >> 16), C(i >> 8), C(i));
 976                 }
 977         }
 978         domask(line + strlen(line), i, mask);
 979         return (line);
 980 }
 981
 982 #ifdef INET6
 983 const char *
 984 netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
 985 {
 986         static char line[MAXHOSTNAMELEN];
 987         u_char *p = (u_char *)mask;
 988         u_char *lim;
 989         int masklen, illegal = 0, flag = NI_WITHSCOPEID;
 990
 991         if (mask) {
 992                 for (masklen = 0, lim = p + 16; p < lim; p++) {
 993                         switch (*p) {
 994                          case 0xff:
 995                                  masklen += 8;
 996                                  break;
 997                          case 0xfe:
 998                                  masklen += 7;
 999                                  break;
1000                          case 0xfc:
1001                                  masklen += 6;
1002                                  break;
1003                          case 0xf8:
1004                                  masklen += 5;
1005                                  break;
1006                          case 0xf0:
1007                                  masklen += 4;
1008                                  break;
1009                          case 0xe0:
1010                                  masklen += 3;
1011                                  break;
1012                          case 0xc0:
1013                                  masklen += 2;
1014                                  break;
1015                          case 0x80:
1016                                  masklen += 1;
1017                                  break;
1018                          case 0x00:
1019                                  break;
1020                          default:
1021                                  illegal ++;
1022                                  break;
1023                         }
1024                 }
1025                 if (illegal)
1026                         fprintf(stderr, "illegal prefixlen\n");
1027         }
1028         else
1029                 masklen = 128;
1030
1031         if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
1032                 return("default");
1033
1034         if (numeric_addr)
1035                 flag |= NI_NUMERICHOST;
1036         getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
1037                     NULL, 0, flag);
1038
1039         if (numeric_addr)
1040                 sprintf(&line[strlen(line)], "/%d", masklen);
1041
1042         return line;
1043 }
1044
1045 char *
1046 routename6(struct sockaddr_in6 *sa6)
1047 {
1048         static char line[MAXHOSTNAMELEN];
1049         int flag = NI_WITHSCOPEID;
1050         /* use local variable for safety */
1051         struct sockaddr_in6 sa6_local;
1052
1053         sa6_local.sin6_family = AF_INET6;
1054         sa6_local.sin6_len = sizeof(sa6_local);
1055         sa6_local.sin6_addr = sa6->sin6_addr;
1056         sa6_local.sin6_scope_id = sa6->sin6_scope_id;
1057
1058         if (numeric_addr)
1059                 flag |= NI_NUMERICHOST;
1060
1061         getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
1062                     line, sizeof(line), NULL, 0, flag);
1063
1064         return line;
1065 }
1066 #endif /*INET6*/
1067
1068 /*
1069  * Print routing statistics
1070  */
1071 void
1072 rt_stats(void)
1073 {
1074         struct rtstatistics rts;
1075         int error = 0;
1076
1077         error = kinfo_get_net_rtstatistics(&rts);
1078         if (error) {
1079                 printf("routing: could not retrieve statistics\n");
1080                 return;
1081         }
1082         printf("routing:\n");
1083
1084 #define p(f, m) if (rts.f || sflag <= 1) \
1085         printf(m, rts.f, plural(rts.f))
1086
1087         p(rts_badredirect, "\t%lu bad routing redirect%s\n");
1088         p(rts_dynamic, "\t%lu dynamically created route%s\n");
1089         p(rts_newgateway, "\t%lu new gateway%s due to redirects\n");
1090         p(rts_unreach, "\t%lu destination%s found unreachable\n");
1091         p(rts_wildcard, "\t%lu use%s of a wildcard route\n");
1092 #undef p
1093 }
1094
1095 char *
1096 ipx_print(struct sockaddr *sa)
1097 {
1098         u_short port;
1099         struct servent *sp = NULL;
1100         const char *net = "", *host = "";
1101         char *p;
1102         u_char *q;
1103         struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
1104         static char mybuf[50];
1105         char cport[10], chost[15], cnet[15];
1106
1107         port = ntohs(work.x_port);
1108
1109         if (ipx_nullnet(work) && ipx_nullhost(work)) {
1110
1111                 if (port) {
1112                         if (sp)
1113                                 sprintf(mybuf, "*.%s", sp->s_name);
1114                         else
1115                                 sprintf(mybuf, "*.%x", port);
1116                 } else
1117                         sprintf(mybuf, "*.*");
1118
1119                 return (mybuf);
1120         }
1121
1122         if (ipx_wildnet(work))
1123                 net = "any";
1124         else if (ipx_nullnet(work))
1125                 net = "*";
1126         else {
1127                 q = work.x_net.c_net;
1128                 sprintf(cnet, "%02x%02x%02x%02x",
1129                         q[0], q[1], q[2], q[3]);
1130                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
1131                         continue;
1132                 net = p;
1133         }
1134
1135         if (ipx_wildhost(work))
1136                 host = "any";
1137         else if (ipx_nullhost(work))
1138                 host = "*";
1139         else {
1140                 q = work.x_host.c_host;
1141                 sprintf(chost, "%02x%02x%02x%02x%02x%02x",
1142                         q[0], q[1], q[2], q[3], q[4], q[5]);
1143                 for (p = chost; *p == '0' && p < chost + 12; p++)
1144                         continue;
1145                 host = p;
1146         }
1147
1148         if (port) {
1149                 if (strcmp(host, "*") == 0)
1150                         host = "";
1151                 if (sp)
1152                         snprintf(cport, sizeof(cport),
1153                                 "%s%s", *host ? "." : "", sp->s_name);
1154                 else
1155                         snprintf(cport, sizeof(cport),
1156                                 "%s%x", *host ? "." : "", port);
1157         } else
1158                 *cport = 0;
1159
1160         snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
1161         return(mybuf);
1162 }
1163
1164 char *
1165 ipx_phost(struct sockaddr *sa)
1166 {
1167         struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
1168         struct sockaddr_ipx work;
1169         static union ipx_net ipx_zeronet;
1170         char *p;
1171
1172         work = *sipx;
1173         work.sipx_addr.x_port = 0;
1174         work.sipx_addr.x_net = ipx_zeronet;
1175         p = ipx_print((struct sockaddr *)&work);
1176         if (strncmp("*.", p, 2) == 0) p += 2;
1177
1178         return(p);
1179 }
1180
1181 void
1182 upHex(char *p0)
1183 {
1184         char *p = p0;
1185
1186         for (; *p; p++)
1187                 switch (*p) {
1188
1189                 case 'a':
1190                 case 'b':
1191                 case 'c':
1192                 case 'd':
1193                 case 'e':
1194                 case 'f':
1195                         *p += ('A' - 'a');
1196                         break;
1197                 }
1198 }
1199
1200 static const char *
1201 labelops(struct rtentry *rt)
1202 {
1203         const char *lops[] = { "push", "pop", "swap", "pop all" };
1204         static char buffer[100];
1205         char *cp = buffer;
1206         struct sockaddr_mpls *smpls;
1207         int i;
1208
1209         for (i=0; i<MPLS_MAXLOPS; ++i) {
1210
1211                 if (rt->rt_shim[i] == NULL)
1212                         break;
1213                 if (i>0) {
1214                         cp += snprintf(cp,
1215                                        sizeof(buffer) - (cp - buffer),
1216                                        ", ");
1217                 }
1218                 smpls = (struct sockaddr_mpls *)kgetsa(rt->rt_shim[i]);
1219                 if (smpls->smpls_op != MPLSLOP_POP &&
1220                     smpls->smpls_op != MPLSLOP_POPALL){
1221                         cp += snprintf(cp,
1222                                        sizeof(buffer) - (cp - buffer),
1223                                        "%s %d",
1224                                        lops[smpls->smpls_op - 1],
1225                                        ntohl(smpls->smpls_label));
1226                 } else {
1227                         cp += snprintf(cp,
1228                                        sizeof(buffer) - (cp - buffer),
1229                                        "%s",
1230                                        lops[smpls->smpls_op - 1]);
1231                 }
1232         }
1233
1234         return (buffer);
1235 }