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 <netgraph/socket/ng_socket.h>
  47
  48 #include <netproto/mpls/mpls.h>
  49
  50 #include <sys/sysctl.h>
  51
  52 #include <arpa/inet.h>
  53 #include <libutil.h>
  54 #include <netdb.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <unistd.h>
  59 #include <err.h>
  60 #include <time.h>
  61 #include <kinfo.h>
  62 #include "netstat.h"
  63
  64 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
  65
  66
  67 /* alignment constraint for routing socket */
  68 #define ROUNDUP(a) \
  69        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
  70 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
  71
  72 /*
  73  * Definitions for showing gateway flags.
  74  */
  75 struct bits {
  76         u_long  b_mask;
  77         char    b_val;
  78 } bits[] = {
  79         { RTF_UP,       'U' },
  80         { RTF_GATEWAY,  'G' },
  81         { RTF_HOST,     'H' },
  82         { RTF_REJECT,   'R' },
  83         { RTF_DYNAMIC,  'D' },
  84         { RTF_MODIFIED, 'M' },
  85         { RTF_DONE,     'd' }, /* Completed -- for routing messages only */
  86         { RTF_CLONING,  'C' },
  87         { RTF_XRESOLVE, 'X' },
  88         { RTF_LLINFO,   'L' },
  89         { RTF_STATIC,   'S' },
  90         { RTF_PROTO1,   '1' },
  91         { RTF_PROTO2,   '2' },
  92         { RTF_WASCLONED,'W' },
  93         { RTF_PRCLONING,'c' },
  94         { RTF_PROTO3,   '3' },
  95         { RTF_BLACKHOLE,'B' },
  96         { RTF_BROADCAST,'b' },
  97         { RTF_MPLSOPS,  'm' },
  98         { 0, 0 }
  99 };
 100
 101 typedef union {
 102         long    dummy;          /* Helps align structure. */
 103         struct  sockaddr u_sa;
 104         u_short u_data[128];
 105 } sa_u;
 106
 107 static sa_u pt_u;
 108
 109 int     do_rtent = 0;
 110 struct  rtentry rtentry;
 111 struct  radix_node rnode;
 112 struct  radix_mask rmask;
 113 struct  radix_node_head *rt_tables[AF_MAX+1];
 114
 115 int     NewTree = 0;
 116
 117 static struct sockaddr *kgetsa (struct sockaddr *);
 118 static void size_cols (int ef, struct radix_node *rn);
 119 static void size_cols_tree (struct radix_node *rn);
 120 static void size_cols_rtentry (struct rtentry *rt);
 121 static void p_tree (struct radix_node *);
 122 static void p_rtnode (void);
 123 static void ntreestuff (void);
 124 static void np_rtentry (struct rt_msghdr *);
 125 static void p_sockaddr (struct sockaddr *, struct sockaddr *, int, int);
 126 static const char *fmt_sockaddr (struct sockaddr *sa, struct sockaddr *mask,
 127                                  int flags);
 128 static void p_flags (int, const char *);
 129 static const char *fmt_flags(int f);
 130 static void p_rtentry (struct rtentry *);
 131 static u_long forgemask (u_long);
 132 static void domask (char *, u_long, u_long);
 133 static const char *labelops(struct rtentry *);
 134
 135 /*
 136  * Print routing tables.
 137  */
 138 void
 139 routepr(u_long rtree)
 140 {
 141         struct radix_node_head *rnh, head;
 142         int i;
 143
 144         printf("Routing tables\n");
 145
 146         if (Aflag == 0 && NewTree) {
 147                 ntreestuff();
 148         } else {
 149                 if (rtree == 0) {
 150                         printf("rt_tables: symbol not in namelist\n");
 151                         return;
 152                 }
 153                 if (cpuflag >= 0) {
 154                         /*
 155                          * Severe hack.
 156                          */
 157                         rtree += cpuflag * (AF_MAX + 1) * sizeof(void *);
 158                 }
 159                 if (kget(rtree, rt_tables) != 0)
 160                         return;
 161                 for (i = 0; i <= AF_MAX; i++) {
 162                         if ((rnh = rt_tables[i]) == NULL)
 163                                 continue;
 164                         if (kget(rnh, head) != 0)
 165                                 continue;
 166                         if (i == AF_UNSPEC) {
 167                                 if (Aflag && af == 0) {
 168                                         printf("Netmasks:\n");
 169                                         p_tree(head.rnh_treetop);
 170                                 }
 171                         } else if (af == AF_UNSPEC || af == i) {
 172                                 size_cols(i, head.rnh_treetop);
 173                                 pr_family(i);
 174                                 do_rtent = 1;
 175                                 pr_rthdr(i);
 176                                 p_tree(head.rnh_treetop);
 177                         }
 178                 }
 179         }
 180 }
 181
 182 /*
 183  * Print address family header before a section of the routing table.
 184  */
 185 void
 186 pr_family(int af1)
 187 {
 188         const char *afname;
 189
 190         switch (af1) {
 191         case AF_INET:
 192                 afname = "Internet";
 193                 break;
 194 #ifdef INET6
 195         case AF_INET6:
 196                 afname = "Internet6";
 197                 break;
 198 #endif /*INET6*/
 199         case AF_ISO:
 200                 afname = "ISO";
 201                 break;
 202         case AF_CCITT:
 203                 afname = "X.25";
 204                 break;
 205         case AF_NETGRAPH:
 206                 afname = "Netgraph";
 207                 break;
 208         case AF_MPLS:
 209                 afname = "MPLS";
 210                 break;
 211         default:
 212                 afname = NULL;
 213                 break;
 214         }
 215         if (afname)
 216                 printf("\n%s:\n", afname);
 217         else
 218                 printf("\nProtocol Family %d:\n", af1);
 219 }
 220
 221 /* column widths; each followed by one space */
 222 #ifndef INET6
 223 #define WID_DST_DEFAULT(af)     18      /* width of destination column */
 224 #define WID_GW_DEFAULT(af)      18      /* width of gateway column */
 225 #define WID_IF_DEFAULT(af)      (Wflag ? 8 : 6) /* width of netif column */
 226 #else
 227 #define WID_DST_DEFAULT(af) \
 228         ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
 229 #define WID_GW_DEFAULT(af) \
 230         ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
 231 #define WID_IF_DEFAULT(af)      ((af) == AF_INET6 ? 8 : (Wflag ? 8 :6))
 232 #endif /*INET6*/
 233
 234 static int wid_dst;
 235 static int wid_gw;
 236 static int wid_flags;
 237 static int wid_refs;
 238 static int wid_use;
 239 static int wid_mtu;
 240 static int wid_if;
 241 static int wid_expire;
 242 static int wid_mplslops;
 243 static int wid_msl;
 244 static int wid_iwmax;
 245 static int wid_iw;
 246
 247 static void
 248 size_cols(int ef, struct radix_node *rn)
 249 {
 250         wid_dst = WID_DST_DEFAULT(ef);
 251         wid_gw = WID_GW_DEFAULT(ef);
 252         wid_flags = 6;
 253         wid_refs = 6;
 254         wid_use = 8;
 255         wid_mtu = 6;
 256         wid_if = WID_IF_DEFAULT(ef);
 257         wid_expire = 6;
 258         wid_mplslops = 7;
 259         wid_msl = 7;
 260         wid_iwmax = 5;
 261         wid_iw = 2;
 262
 263         if (Wflag)
 264                 size_cols_tree(rn);
 265 }
 266
 267 static void
 268 size_cols_tree(struct radix_node *rn)
 269 {
 270 again:
 271         if (kget(rn, rnode) != 0)
 272                 return;
 273         if (!(rnode.rn_flags & RNF_ACTIVE))
 274                 return;
 275         if (rnode.rn_bit < 0) {
 276                 if ((rnode.rn_flags & RNF_ROOT) == 0) {
 277                         if (kget(rn, rtentry) != 0)
 278                                 return;
 279                         size_cols_rtentry(&rtentry);
 280                 }
 281                 if ((rn = rnode.rn_dupedkey))
 282                         goto again;
 283         } else {
 284                 rn = rnode.rn_right;
 285                 size_cols_tree(rnode.rn_left);
 286                 size_cols_tree(rn);
 287         }
 288 }
 289
 290 static void
 291 size_cols_rtentry(struct rtentry *rt)
 292 {
 293         static struct ifnet ifnet, *lastif;
 294         struct rtentry parent;
 295         static char buffer[100];
 296         const char *bp;
 297         struct sockaddr *sa;
 298         sa_u addr, mask;
 299         int len;
 300
 301         /*
 302          * Don't print protocol-cloned routes unless -a.
 303          */
 304         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 305                 if (kget(rt->rt_parent, parent) != 0)
 306                         return;
 307                 if (parent.rt_flags & RTF_PRCLONING)
 308                         return;
 309         }
 310
 311         bzero(&addr, sizeof(addr));
 312         if ((sa = kgetsa(rt_key(rt))))
 313                 bcopy(sa, &addr, sa->sa_len);
 314         bzero(&mask, sizeof(mask));
 315         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 316                 bcopy(sa, &mask, sa->sa_len);
 317         bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
 318         len = strlen(bp);
 319         wid_dst = MAX(len, wid_dst);
 320
 321         bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
 322         len = strlen(bp);
 323         wid_gw = MAX(len, wid_gw);
 324
 325         bp = fmt_flags(rt->rt_flags);
 326         len = strlen(bp);
 327         wid_flags = MAX(len, wid_flags);
 328
 329         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 330                 len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
 331                 wid_refs = MAX(len, wid_refs);
 332                 len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
 333                 wid_use = MAX(len, wid_use);
 334                 if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
 335                         len = snprintf(buffer, sizeof(buffer),
 336                                        "%lu", rt->rt_rmx.rmx_mtu);
 337                         wid_mtu = MAX(len, wid_mtu);
 338                 }
 339         }
 340         if (rt->rt_ifp) {
 341                 if (rt->rt_ifp != lastif) {
 342                         if (kget(rt->rt_ifp, ifnet) == 0)
 343                                 len = strlen(ifnet.if_xname);
 344                         else
 345                                 len = strlen("---");
 346                         lastif = rt->rt_ifp;
 347                         wid_if = MAX(len, wid_if);
 348                 }
 349                 if (rt->rt_rmx.rmx_expire) {
 350                         struct timespec sp;
 351                         int expire_time;
 352
 353                         clock_gettime(CLOCK_MONOTONIC, &sp);
 354
 355                         expire_time = (int)(rt->rt_rmx.rmx_expire - sp.tv_sec);
 356
 357                         if (expire_time > 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_NETGRAPH:
 681             {
 682                 printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
 683                 break;
 684             }
 685         case AF_LINK:
 686             {
 687                 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
 688
 689                 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
 690                     sdl->sdl_slen == 0)
 691                         (void) sprintf(workbuf, "link#%d", sdl->sdl_index);
 692                 else
 693                         switch (sdl->sdl_type) {
 694
 695                         case IFT_ETHER:
 696                         case IFT_L2VLAN:
 697                         case IFT_CARP:
 698                                 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
 699                                         cp = ether_ntoa((struct ether_addr *)
 700                                             (sdl->sdl_data + sdl->sdl_nlen));
 701                                         break;
 702                                 }
 703                                 /* FALLTHROUGH */
 704                         default:
 705                                 cp = link_ntoa(sdl);
 706                                 break;
 707                         }
 708                 break;
 709             }
 710
 711         case AF_MPLS:
 712             {
 713                 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
 714
 715                 (void) sprintf(workbuf, "%d", ntohl(smpls->smpls_label));
 716                 break;
 717             }
 718
 719         default:
 720             {
 721                 u_char *s = (u_char *)sa->sa_data, *slim;
 722                 char *cq, *cqlim;
 723
 724                 cq = workbuf;
 725                 slim =  sa->sa_len + (u_char *) sa;
 726                 cqlim = cq + sizeof(workbuf) - 6;
 727                 cq += sprintf(cq, "(%d)", sa->sa_family);
 728                 while (s < slim && cq < cqlim) {
 729                         cq += sprintf(cq, " %02x", *s++);
 730                         if (s < slim)
 731                             cq += sprintf(cq, "%02x", *s++);
 732                 }
 733                 cp = workbuf;
 734             }
 735         }
 736
 737         return (cp);
 738 }
 739
 740 static void
 741 p_flags(int f, const char *format)
 742 {
 743         printf(format, fmt_flags(f));
 744 }
 745
 746 static const char *
 747 fmt_flags(int f)
 748 {
 749         static char name[33];
 750         char *flags;
 751         struct bits *p = bits;
 752
 753         for (flags = name; p->b_mask; p++)
 754                 if (p->b_mask & f)
 755                         *flags++ = p->b_val;
 756         *flags = '\0';
 757         return (name);
 758 }
 759
 760 static void
 761 p_rtentry(struct rtentry *rt)
 762 {
 763         static struct ifnet ifnet, *lastif;
 764         struct rtentry parent;
 765         static char buffer[128];
 766         static char prettyname[128];
 767         struct sockaddr *sa;
 768         sa_u addr, mask;
 769
 770         /*
 771          * Don't print protocol-cloned routes unless -a.
 772          */
 773         if (rt->rt_flags & RTF_WASCLONED && !aflag) {
 774                 if (kget(rt->rt_parent, parent) != 0)
 775                         return;
 776                 if (parent.rt_flags & RTF_PRCLONING)
 777                         return;
 778         }
 779
 780         bzero(&addr, sizeof(addr));
 781         if ((sa = kgetsa(rt_key(rt))))
 782                 bcopy(sa, &addr, sa->sa_len);
 783         bzero(&mask, sizeof(mask));
 784         if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
 785                 bcopy(sa, &mask, sa->sa_len);
 786         p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
 787         p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
 788         snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
 789         p_flags(rt->rt_flags, buffer);
 790         if (addr.u_sa.sa_family == AF_INET || Wflag) {
 791                 printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
 792                                      wid_use, rt->rt_use);
 793                 if (Wflag) {
 794                         if (rt->rt_rmx.rmx_mtu != 0)
 795                                 printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
 796                         else
 797                                 printf("%*s ", wid_mtu, "");
 798                 }
 799         }
 800         if (rt->rt_ifp) {
 801                 if (rt->rt_ifp != lastif) {
 802                         if (kget(rt->rt_ifp, ifnet) == 0)
 803                                 strlcpy(prettyname, ifnet.if_xname,
 804                                     sizeof(prettyname));
 805                         else
 806                                 strlcpy(prettyname, "---", sizeof(prettyname));
 807                         lastif = rt->rt_ifp;
 808                 }
 809                 printf("%*.*s", wid_if, wid_if, prettyname);
 810                 if (rt->rt_rmx.rmx_expire) {
 811                         struct timespec sp;
 812                         int expire_time;
 813
 814                         clock_gettime(CLOCK_MONOTONIC, &sp);
 815
 816                         expire_time = (int)(rt->rt_rmx.rmx_expire - sp.tv_sec);
 817                         if (expire_time > 0)
 818                                 printf(" %*d", wid_expire, (int)expire_time);
 819                         else
 820                                 printf("%*s ", wid_expire, "");
 821                 } else {
 822                         printf("%*s ", wid_expire, "");
 823                 }
 824                 if (rt->rt_nodes[0].rn_dupedkey)
 825                         printf(" =>");
 826         }
 827         if (Wflag) {
 828                 if (rt->rt_shim[0] != NULL)
 829                         printf(" %-*s", wid_mplslops, labelops(rt));
 830                 else
 831                         printf(" %-*s", wid_mplslops, "");
 832                 if (rt->rt_rmx.rmx_msl != 0)
 833                         printf(" %*lu", wid_msl, rt->rt_rmx.rmx_msl);
 834                 else
 835                         printf("%*s ", wid_msl, "");
 836                 if (rt->rt_rmx.rmx_iwmaxsegs != 0)
 837                         printf(" %*lu", wid_iwmax, rt->rt_rmx.rmx_iwmaxsegs);
 838                 else
 839                         printf("%*s ", wid_iwmax, "");
 840                 if (rt->rt_rmx.rmx_iwcapsegs != 0)
 841                         printf(" %*lu", wid_iw, rt->rt_rmx.rmx_iwcapsegs);
 842                 else
 843                         printf("%*s ", wid_iw, "");
 844         }
 845         putchar('\n');
 846 }
 847
 848 char *
 849 routename(u_long in)
 850 {
 851         char *cp;
 852         static char line[MAXHOSTNAMELEN];
 853         struct hostent *hp;
 854
 855         cp = NULL;
 856         if (!numeric_addr) {
 857                 hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
 858                 if (hp) {
 859                         cp = hp->h_name;
 860                         trimdomain(cp, strlen(cp));
 861                 }
 862         }
 863         if (cp) {
 864                 strncpy(line, cp, sizeof(line) - 1);
 865                 line[sizeof(line) - 1] = '\0';
 866         } else {
 867 #define C(x)    ((x) & 0xff)
 868                 in = ntohl(in);
 869                 sprintf(line, "%lu.%lu.%lu.%lu",
 870                     C(in >> 24), C(in >> 16), C(in >> 8), C(in));
 871         }
 872         return (line);
 873 }
 874
 875 static u_long
 876 forgemask(u_long a)
 877 {
 878         u_long m;
 879
 880         if (IN_CLASSA(a))
 881                 m = IN_CLASSA_NET;
 882         else if (IN_CLASSB(a))
 883                 m = IN_CLASSB_NET;
 884         else
 885                 m = IN_CLASSC_NET;
 886         return (m);
 887 }
 888
 889 static void
 890 domask(char *dst, u_long addr, u_long mask)
 891 {
 892         int b, i;
 893
 894         if (!mask || (forgemask(addr) == mask)) {
 895                 *dst = '\0';
 896                 return;
 897         }
 898         i = 0;
 899         for (b = 0; b < 32; b++)
 900                 if (mask & (1 << b)) {
 901                         int bb;
 902
 903                         i = b;
 904                         for (bb = b+1; bb < 32; bb++)
 905                                 if (!(mask & (1 << bb))) {
 906                                         i = -1; /* noncontig */
 907                                         break;
 908                                 }
 909                         break;
 910                 }
 911         if (i == -1)
 912                 sprintf(dst, "&0x%lx", mask);
 913         else
 914                 sprintf(dst, "/%d", 32-i);
 915 }
 916
 917 /*
 918  * Return the name of the network whose address is given.
 919  * The address is assumed to be that of a net or subnet, not a host.
 920  */
 921 char *
 922 netname(u_long in, u_long mask)
 923 {
 924         char *cp = NULL;
 925         static char line[MAXHOSTNAMELEN];
 926         struct netent *np = NULL;
 927         u_long dmask;
 928         u_long i;
 929
 930 #define NSHIFT(m) (                                                     \
 931         (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :                       \
 932         (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :                       \
 933         (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :                       \
 934         0)
 935
 936         i = ntohl(in);
 937         dmask = forgemask(i);
 938         if (!numeric_addr && i) {
 939                 np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
 940                 if (np == NULL && mask == 0)
 941                         np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
 942                 if (np != NULL) {
 943                         cp = np->n_name;
 944                         trimdomain(cp, strlen(cp));
 945                 }
 946         }
 947 #undef NSHIFT
 948         if (cp != NULL) {
 949                 strncpy(line, cp, sizeof(line) - 1);
 950                 line[sizeof(line) - 1] = '\0';
 951         } else {
 952                 if (mask <= IN_CLASSA_NET &&
 953                         (i & IN_CLASSA_HOST) == 0) {
 954                                 sprintf(line, "%lu", C(i >> 24));
 955                 } else if (mask <= IN_CLASSB_NET &&
 956                         (i & IN_CLASSB_HOST) == 0) {
 957                                 sprintf(line, "%lu.%lu",
 958                                         C(i >> 24), C(i >> 16));
 959                 } else if (mask <= IN_CLASSC_NET &&
 960                         (i & IN_CLASSC_HOST) == 0) {
 961                                 sprintf(line, "%lu.%lu.%lu",
 962                                         C(i >> 24), C(i >> 16), C(i >> 8));
 963                 } else {
 964                         sprintf(line, "%lu.%lu.%lu.%lu",
 965                                 C(i >> 24), C(i >> 16), C(i >> 8), C(i));
 966                 }
 967         }
 968         domask(line + strlen(line), i, mask);
 969         return (line);
 970 }
 971
 972 #ifdef INET6
 973 const char *
 974 netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
 975 {
 976         static char line[MAXHOSTNAMELEN];
 977         u_char *p = (u_char *)mask;
 978         u_char *lim;
 979         int masklen, illegal = 0, flag = NI_WITHSCOPEID;
 980
 981         if (mask) {
 982                 for (masklen = 0, lim = p + 16; p < lim; p++) {
 983                         switch (*p) {
 984                          case 0xff:
 985                                  masklen += 8;
 986                                  break;
 987                          case 0xfe:
 988                                  masklen += 7;
 989                                  break;
 990                          case 0xfc:
 991                                  masklen += 6;
 992                                  break;
 993                          case 0xf8:
 994                                  masklen += 5;
 995                                  break;
 996                          case 0xf0:
 997                                  masklen += 4;
 998                                  break;
 999                          case 0xe0:
1000                                  masklen += 3;
1001                                  break;
1002                          case 0xc0:
1003                                  masklen += 2;
1004                                  break;
1005                          case 0x80:
1006                                  masklen += 1;
1007                                  break;
1008                          case 0x00:
1009                                  break;
1010                          default:
1011                                  illegal ++;
1012                                  break;
1013                         }
1014                 }
1015                 if (illegal)
1016                         fprintf(stderr, "illegal prefixlen\n");
1017         }
1018         else
1019                 masklen = 128;
1020
1021         if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
1022                 return("default");
1023
1024         if (numeric_addr)
1025                 flag |= NI_NUMERICHOST;
1026         getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
1027                     NULL, 0, flag);
1028
1029         if (numeric_addr)
1030                 sprintf(&line[strlen(line)], "/%d", masklen);
1031
1032         return line;
1033 }
1034
1035 char *
1036 routename6(struct sockaddr_in6 *sa6)
1037 {
1038         static char line[MAXHOSTNAMELEN];
1039         int flag = NI_WITHSCOPEID;
1040         /* use local variable for safety */
1041         struct sockaddr_in6 sa6_local;
1042
1043         sa6_local.sin6_family = AF_INET6;
1044         sa6_local.sin6_len = sizeof(sa6_local);
1045         sa6_local.sin6_addr = sa6->sin6_addr;
1046         sa6_local.sin6_scope_id = sa6->sin6_scope_id;
1047
1048         if (numeric_addr)
1049                 flag |= NI_NUMERICHOST;
1050
1051         getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
1052                     line, sizeof(line), NULL, 0, flag);
1053
1054         return line;
1055 }
1056 #endif /*INET6*/
1057
1058 /*
1059  * Print routing statistics
1060  */
1061 void
1062 rt_stats(void)
1063 {
1064         struct rtstatistics rts;
1065         int error = 0;
1066
1067         error = kinfo_get_net_rtstatistics(&rts);
1068         if (error) {
1069                 printf("routing: could not retrieve statistics\n");
1070                 return;
1071         }
1072         printf("routing:\n");
1073
1074 #define p(f, m) if (rts.f || sflag <= 1) \
1075         printf(m, rts.f, plural(rts.f))
1076
1077         p(rts_badredirect, "\t%lu bad routing redirect%s\n");
1078         p(rts_dynamic, "\t%lu dynamically created route%s\n");
1079         p(rts_newgateway, "\t%lu new gateway%s due to redirects\n");
1080         p(rts_unreach, "\t%lu destination%s found unreachable\n");
1081         p(rts_wildcard, "\t%lu use%s of a wildcard route\n");
1082 #undef p
1083 }
1084
1085 void
1086 upHex(char *p0)
1087 {
1088         char *p = p0;
1089
1090         for (; *p; p++)
1091                 switch (*p) {
1092
1093                 case 'a':
1094                 case 'b':
1095                 case 'c':
1096                 case 'd':
1097                 case 'e':
1098                 case 'f':
1099                         *p += ('A' - 'a');
1100                         break;
1101                 }
1102 }
1103
1104 static const char *
1105 labelops(struct rtentry *rt)
1106 {
1107         const char *lops[] = { "push", "pop", "swap", "pop all" };
1108         static char buffer[100];
1109         char *cp = buffer;
1110         struct sockaddr_mpls *smpls;
1111         int i;
1112
1113         for (i=0; i<MPLS_MAXLOPS; ++i) {
1114
1115                 if (rt->rt_shim[i] == NULL)
1116                         break;
1117                 if (i>0) {
1118                         cp += snprintf(cp,
1119                                        sizeof(buffer) - (cp - buffer),
1120                                        ", ");
1121                 }
1122                 smpls = (struct sockaddr_mpls *)kgetsa(rt->rt_shim[i]);
1123                 if (smpls->smpls_op != MPLSLOP_POP &&
1124                     smpls->smpls_op != MPLSLOP_POPALL){
1125                         cp += snprintf(cp,
1126                                        sizeof(buffer) - (cp - buffer),
1127                                        "%s %d",
1128                                        lops[smpls->smpls_op - 1],
1129                                        ntohl(smpls->smpls_label));
1130                 } else {
1131                         cp += snprintf(cp,
1132                                        sizeof(buffer) - (cp - buffer),
1133                                        "%s",
1134                                        lops[smpls->smpls_op - 1]);
1135                 }
1136         }
1137
1138         return (buffer);
1139 }