usr.bin/netstat/inet.c

   1 /*-
   2  * Copyright (c) 1983, 1988, 1993, 1995
   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
  34 #if 0
  35 #ifndef lint
  36 static char sccsid[] = "@(#)inet.c      8.5 (Berkeley) 5/24/95";
  37 #endif /* not lint */
  38 #endif
  39
  40 #include <sys/cdefs.h>
  41 __FBSDID("$FreeBSD$");
  42
  43 #include <sys/param.h>
  44 #include <sys/queue.h>
  45 #include <sys/domain.h>
  46 #include <sys/protosw.h>
  47 #include <sys/socket.h>
  48 #include <sys/socketvar.h>
  49 #include <sys/sysctl.h>
  50
  51 #include <net/route.h>
  52 #include <netinet/in.h>
  53 #include <netinet/in_systm.h>
  54 #include <netinet/ip.h>
  55 #include <netinet/ip_carp.h>
  56 #ifdef INET6
  57 #include <netinet/ip6.h>
  58 #endif /* INET6 */
  59 #include <netinet/in_pcb.h>
  60 #include <netinet/ip_icmp.h>
  61 #include <netinet/icmp_var.h>
  62 #include <netinet/igmp_var.h>
  63 #include <netinet/ip_var.h>
  64 #include <netinet/pim_var.h>
  65 #include <netinet/tcp.h>
  66 #include <netinet/tcpip.h>
  67 #include <netinet/tcp_seq.h>
  68 #define TCPSTATES
  69 #include <netinet/tcp_fsm.h>
  70 #include <netinet/tcp_timer.h>
  71 #include <netinet/tcp_var.h>
  72 #include <netinet/tcp_debug.h>
  73 #include <netinet/udp.h>
  74 #include <netinet/udp_var.h>
  75
  76 #include <arpa/inet.h>
  77 #include <err.h>
  78 #include <errno.h>
  79 #include <libutil.h>
  80 #include <netdb.h>
  81 #include <stdint.h>
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <string.h>
  85 #include <unistd.h>
  86 #include "netstat.h"
  87
  88 char    *inetname(struct in_addr *);
  89 void    inetprint(struct in_addr *, int, const char *, int);
  90 #ifdef INET6
  91 static int udp_done, tcp_done;
  92 #endif /* INET6 */
  93
  94 static int
  95 pcblist_sysctl(int proto, char **bufp, int istcp)
  96 {
  97         const char *mibvar;
  98         char *buf;
  99         size_t len;
 100
 101         switch (proto) {
 102         case IPPROTO_TCP:
 103                 mibvar = "net.inet.tcp.pcblist";
 104                 break;
 105         case IPPROTO_UDP:
 106                 mibvar = "net.inet.udp.pcblist";
 107                 break;
 108         case IPPROTO_DIVERT:
 109                 mibvar = "net.inet.divert.pcblist";
 110                 break;
 111         default:
 112                 mibvar = "net.inet.raw.pcblist";
 113                 break;
 114         }
 115
 116         len = 0;
 117         if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
 118                 if (errno != ENOENT)
 119                         warn("sysctl: %s", mibvar);
 120                 return (0);
 121         }
 122         if ((buf = malloc(len)) == 0) {
 123                 warnx("malloc %lu bytes", (u_long)len);
 124                 return (0);
 125         }
 126         if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
 127                 warn("sysctl: %s", mibvar);
 128                 free(buf);
 129                 return (0);
 130         }
 131         *bufp = buf;
 132         return (1);
 133 }
 134
 135 /*
 136  * Copied directly from uipc_socket2.c.  We leave out some fields that are in
 137  * nested structures that aren't used to avoid extra work.
 138  */
 139 static void
 140 sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb)
 141 {
 142         xsb->sb_cc = sb->sb_cc;
 143         xsb->sb_hiwat = sb->sb_hiwat;
 144         xsb->sb_mbcnt = sb->sb_mbcnt;
 145         xsb->sb_mbmax = sb->sb_mbmax;
 146         xsb->sb_lowat = sb->sb_lowat;
 147         xsb->sb_flags = sb->sb_flags;
 148         xsb->sb_timeo = sb->sb_timeo;
 149 }
 150
 151 int
 152 sotoxsocket(struct socket *so, struct xsocket *xso)
 153 {
 154         struct protosw proto;
 155         struct domain domain;
 156
 157         bzero(xso, sizeof *xso);
 158         xso->xso_len = sizeof *xso;
 159         xso->xso_so = so;
 160         xso->so_type = so->so_type;
 161         xso->so_options = so->so_options;
 162         xso->so_linger = so->so_linger;
 163         xso->so_state = so->so_state;
 164         xso->so_pcb = so->so_pcb;
 165         if (kread((uintptr_t)so->so_proto, &proto, sizeof(proto)) != 0)
 166                 return (-1);
 167         xso->xso_protocol = proto.pr_protocol;
 168         if (kread((uintptr_t)proto.pr_domain, &domain, sizeof(domain)) != 0)
 169                 return (-1);
 170         xso->xso_family = domain.dom_family;
 171         xso->so_qlen = so->so_qlen;
 172         xso->so_incqlen = so->so_incqlen;
 173         xso->so_qlimit = so->so_qlimit;
 174         xso->so_timeo = so->so_timeo;
 175         xso->so_error = so->so_error;
 176         xso->so_oobmark = so->so_oobmark;
 177         sbtoxsockbuf(&so->so_snd, &xso->so_snd);
 178         sbtoxsockbuf(&so->so_rcv, &xso->so_rcv);
 179         return (0);
 180 }
 181
 182 static int
 183 pcblist_kvm(u_long off, char **bufp, int istcp)
 184 {
 185         struct inpcbinfo pcbinfo;
 186         struct inpcbhead listhead;
 187         struct inpcb *inp;
 188         struct xinpcb xi;
 189         struct xinpgen xig;
 190         struct xtcpcb xt;
 191         struct socket so;
 192         struct xsocket *xso;
 193         char *buf, *p;
 194         size_t len;
 195
 196         if (off == 0)
 197                 return (0);
 198         kread(off, &pcbinfo, sizeof(pcbinfo));
 199         if (istcp)
 200                 len = 2 * sizeof(xig) +
 201                     (pcbinfo.ipi_count + pcbinfo.ipi_count / 8) *
 202                     sizeof(struct xtcpcb);
 203         else
 204                 len = 2 * sizeof(xig) +
 205                     (pcbinfo.ipi_count + pcbinfo.ipi_count / 8) *
 206                     sizeof(struct xinpcb);
 207         if ((buf = malloc(len)) == 0) {
 208                 warnx("malloc %lu bytes", (u_long)len);
 209                 return (0);
 210         }
 211         p = buf;
 212
 213 #define COPYOUT(obj, size) do {                                         \
 214         if (len < (size)) {                                             \
 215                 warnx("buffer size exceeded");                          \
 216                 goto fail;                                              \
 217         }                                                               \
 218         bcopy((obj), p, (size));                                        \
 219         len -= (size);                                                  \
 220         p += (size);                                                    \
 221 } while (0)
 222
 223 #define KREAD(off, buf, len) do {                                       \
 224         if (kread((uintptr_t)(off), (buf), (len)) != 0)                 \
 225                 goto fail;                                              \
 226 } while (0)
 227
 228         /* Write out header. */
 229         xig.xig_len = sizeof xig;
 230         xig.xig_count = pcbinfo.ipi_count;
 231         xig.xig_gen = pcbinfo.ipi_gencnt;
 232         xig.xig_sogen = 0;
 233         COPYOUT(&xig, sizeof xig);
 234
 235         /* Walk the PCB list. */
 236         xt.xt_len = sizeof xt;
 237         xi.xi_len = sizeof xi;
 238         if (istcp)
 239                 xso = &xt.xt_socket;
 240         else
 241                 xso = &xi.xi_socket;
 242         KREAD(pcbinfo.ipi_listhead, &listhead, sizeof(listhead));
 243         LIST_FOREACH(inp, &listhead, inp_list) {
 244                 if (istcp) {
 245                         KREAD(inp, &xt.xt_inp, sizeof(*inp));
 246                         inp = &xt.xt_inp;
 247                 } else {
 248                         KREAD(inp, &xi.xi_inp, sizeof(*inp));
 249                         inp = &xi.xi_inp;
 250                 }
 251
 252                 if (inp->inp_gencnt > pcbinfo.ipi_gencnt)
 253                         continue;
 254
 255                 if (istcp) {
 256                         if (inp->inp_ppcb == NULL)
 257                                 bzero(&xt.xt_tp, sizeof xt.xt_tp);
 258                         else if (inp->inp_flags & INP_TIMEWAIT) {
 259                                 bzero(&xt.xt_tp, sizeof xt.xt_tp);
 260                                 xt.xt_tp.t_state = TCPS_TIME_WAIT;
 261                         } else
 262                                 KREAD(inp->inp_ppcb, &xt.xt_tp,
 263                                     sizeof xt.xt_tp);
 264                 }
 265                 if (inp->inp_socket) {
 266                         KREAD(inp->inp_socket, &so, sizeof(so));
 267                         if (sotoxsocket(&so, xso) != 0)
 268                                 goto fail;
 269                 } else {
 270                         bzero(xso, sizeof(*xso));
 271                         if (istcp)
 272                                 xso->xso_protocol = IPPROTO_TCP;
 273                 }
 274                 if (istcp)
 275                         COPYOUT(&xt, sizeof xt);
 276                 else
 277                         COPYOUT(&xi, sizeof xi);
 278         }
 279
 280         /* Reread the pcbinfo and write out the footer. */
 281         kread(off, &pcbinfo, sizeof(pcbinfo));
 282         xig.xig_count = pcbinfo.ipi_count;
 283         xig.xig_gen = pcbinfo.ipi_gencnt;
 284         COPYOUT(&xig, sizeof xig);
 285
 286         *bufp = buf;
 287         return (1);
 288
 289 fail:
 290         free(buf);
 291         return (0);
 292 #undef COPYOUT
 293 #undef KREAD
 294 }
 295
 296 /*
 297  * Print a summary of connections related to an Internet
 298  * protocol.  For TCP, also give state of connection.
 299  * Listening processes (aflag) are suppressed unless the
 300  * -a (all) flag is specified.
 301  */
 302 void
 303 protopr(u_long off, const char *name, int af1, int proto)
 304 {
 305         int istcp;
 306         static int first = 1;
 307         char *buf;
 308         const char *vchar;
 309         struct tcpcb *tp = NULL;
 310         struct inpcb *inp;
 311         struct xinpgen *xig, *oxig;
 312         struct xsocket *so;
 313
 314         istcp = 0;
 315         switch (proto) {
 316         case IPPROTO_TCP:
 317 #ifdef INET6
 318                 if (tcp_done != 0)
 319                         return;
 320                 else
 321                         tcp_done = 1;
 322 #endif
 323                 istcp = 1;
 324                 break;
 325         case IPPROTO_UDP:
 326 #ifdef INET6
 327                 if (udp_done != 0)
 328                         return;
 329                 else
 330                         udp_done = 1;
 331 #endif
 332                 break;
 333         }
 334         if (live) {
 335                 if (!pcblist_sysctl(proto, &buf, istcp))
 336                         return;
 337         } else {
 338                 if (!pcblist_kvm(off, &buf, istcp))
 339                         return;
 340         }
 341
 342         oxig = xig = (struct xinpgen *)buf;
 343         for (xig = (struct xinpgen *)((char *)xig + xig->xig_len);
 344              xig->xig_len > sizeof(struct xinpgen);
 345              xig = (struct xinpgen *)((char *)xig + xig->xig_len)) {
 346                 if (istcp) {
 347                         tp = &((struct xtcpcb *)xig)->xt_tp;
 348                         inp = &((struct xtcpcb *)xig)->xt_inp;
 349                         so = &((struct xtcpcb *)xig)->xt_socket;
 350                 } else {
 351                         inp = &((struct xinpcb *)xig)->xi_inp;
 352                         so = &((struct xinpcb *)xig)->xi_socket;
 353                 }
 354
 355                 /* Ignore sockets for protocols other than the desired one. */
 356                 if (so->xso_protocol != proto)
 357                         continue;
 358
 359                 /* Ignore PCBs which were freed during copyout. */
 360                 if (inp->inp_gencnt > oxig->xig_gen)
 361                         continue;
 362
 363                 if ((af1 == AF_INET && (inp->inp_vflag & INP_IPV4) == 0)
 364 #ifdef INET6
 365                     || (af1 == AF_INET6 && (inp->inp_vflag & INP_IPV6) == 0)
 366 #endif /* INET6 */
 367                     || (af1 == AF_UNSPEC && ((inp->inp_vflag & INP_IPV4) == 0
 368 #ifdef INET6
 369                                           && (inp->inp_vflag & INP_IPV6) == 0
 370 #endif /* INET6 */
 371                         ))
 372                     )
 373                         continue;
 374                 if (!aflag &&
 375                     (
 376                      (istcp && tp->t_state == TCPS_LISTEN)
 377                      || (af1 == AF_INET &&
 378                       inet_lnaof(inp->inp_laddr) == INADDR_ANY)
 379 #ifdef INET6
 380                      || (af1 == AF_INET6 &&
 381                          IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 382 #endif /* INET6 */
 383                      || (af1 == AF_UNSPEC &&
 384                          (((inp->inp_vflag & INP_IPV4) != 0 &&
 385                            inet_lnaof(inp->inp_laddr) == INADDR_ANY)
 386 #ifdef INET6
 387                           || ((inp->inp_vflag & INP_IPV6) != 0 &&
 388                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 389 #endif
 390                           ))
 391                      ))
 392                         continue;
 393
 394                 if (first) {
 395                         if (!Lflag) {
 396                                 printf("Active Internet connections");
 397                                 if (aflag)
 398                                         printf(" (including servers)");
 399                         } else
 400                                 printf(
 401         "Current listen queue sizes (qlen/incqlen/maxqlen)");
 402                         putchar('\n');
 403                         if (Aflag)
 404                                 printf("%-8.8s ", "Tcpcb");
 405                         if (Lflag)
 406                                 printf("%-5.5s %-14.14s %-22.22s\n",
 407                                     "Proto", "Listen", "Local Address");
 408                         else
 409                                 printf((Aflag && !Wflag) ?
 410                 "%-5.5s %-6.6s %-6.6s  %-18.18s %-18.18s %s\n" :
 411                 "%-5.5s %-6.6s %-6.6s  %-22.22s %-22.22s %s\n",
 412                                     "Proto", "Recv-Q", "Send-Q",
 413                                     "Local Address", "Foreign Address",
 414                                     "(state)");
 415                         first = 0;
 416                 }
 417                 if (Lflag && so->so_qlimit == 0)
 418                         continue;
 419                 if (Aflag) {
 420                         if (istcp)
 421                                 printf("%8lx ", (u_long)inp->inp_ppcb);
 422                         else
 423                                 printf("%8lx ", (u_long)so->so_pcb);
 424                 }
 425 #ifdef INET6
 426                 if ((inp->inp_vflag & INP_IPV6) != 0)
 427                         vchar = ((inp->inp_vflag & INP_IPV4) != 0) ?
 428                             "46" : "6 ";
 429                 else
 430 #endif
 431                 vchar = ((inp->inp_vflag & INP_IPV4) != 0) ?
 432                     "4 " : "  ";
 433                 printf("%-3.3s%-2.2s ", name, vchar);
 434                 if (Lflag) {
 435                         char buf1[15];
 436
 437                         snprintf(buf1, 15, "%d/%d/%d", so->so_qlen,
 438                             so->so_incqlen, so->so_qlimit);
 439                         printf("%-14.14s ", buf1);
 440                 } else {
 441                         printf("%6u %6u ", so->so_rcv.sb_cc, so->so_snd.sb_cc);
 442                 }
 443                 if (numeric_port) {
 444                         if (inp->inp_vflag & INP_IPV4) {
 445                                 inetprint(&inp->inp_laddr, (int)inp->inp_lport,
 446                                     name, 1);
 447                                 if (!Lflag)
 448                                         inetprint(&inp->inp_faddr,
 449                                             (int)inp->inp_fport, name, 1);
 450                         }
 451 #ifdef INET6
 452                         else if (inp->inp_vflag & INP_IPV6) {
 453                                 inet6print(&inp->in6p_laddr,
 454                                     (int)inp->inp_lport, name, 1);
 455                                 if (!Lflag)
 456                                         inet6print(&inp->in6p_faddr,
 457                                             (int)inp->inp_fport, name, 1);
 458                         } /* else nothing printed now */
 459 #endif /* INET6 */
 460                 } else if (inp->inp_flags & INP_ANONPORT) {
 461                         if (inp->inp_vflag & INP_IPV4) {
 462                                 inetprint(&inp->inp_laddr, (int)inp->inp_lport,
 463                                     name, 1);
 464                                 if (!Lflag)
 465                                         inetprint(&inp->inp_faddr,
 466                                             (int)inp->inp_fport, name, 0);
 467                         }
 468 #ifdef INET6
 469                         else if (inp->inp_vflag & INP_IPV6) {
 470                                 inet6print(&inp->in6p_laddr,
 471                                     (int)inp->inp_lport, name, 1);
 472                                 if (!Lflag)
 473                                         inet6print(&inp->in6p_faddr,
 474                                             (int)inp->inp_fport, name, 0);
 475                         } /* else nothing printed now */
 476 #endif /* INET6 */
 477                 } else {
 478                         if (inp->inp_vflag & INP_IPV4) {
 479                                 inetprint(&inp->inp_laddr, (int)inp->inp_lport,
 480                                     name, 0);
 481                                 if (!Lflag)
 482                                         inetprint(&inp->inp_faddr,
 483                                             (int)inp->inp_fport, name,
 484                                             inp->inp_lport != inp->inp_fport);
 485                         }
 486 #ifdef INET6
 487                         else if (inp->inp_vflag & INP_IPV6) {
 488                                 inet6print(&inp->in6p_laddr,
 489                                     (int)inp->inp_lport, name, 0);
 490                                 if (!Lflag)
 491                                         inet6print(&inp->in6p_faddr,
 492                                             (int)inp->inp_fport, name,
 493                                             inp->inp_lport != inp->inp_fport);
 494                         } /* else nothing printed now */
 495 #endif /* INET6 */
 496                 }
 497                 if (istcp && !Lflag) {
 498                         if (tp->t_state < 0 || tp->t_state >= TCP_NSTATES)
 499                                 printf("%d", tp->t_state);
 500                       else {
 501                                 printf("%s", tcpstates[tp->t_state]);
 502 #if defined(TF_NEEDSYN) && defined(TF_NEEDFIN)
 503                                 /* Show T/TCP `hidden state' */
 504                                 if (tp->t_flags & (TF_NEEDSYN|TF_NEEDFIN))
 505                                         putchar('*');
 506 #endif /* defined(TF_NEEDSYN) && defined(TF_NEEDFIN) */
 507                         }
 508                 }
 509                 putchar('\n');
 510         }
 511         if (xig != oxig && xig->xig_gen != oxig->xig_gen) {
 512                 if (oxig->xig_count > xig->xig_count) {
 513                         printf("Some %s sockets may have been deleted.\n",
 514                             name);
 515                 } else if (oxig->xig_count < xig->xig_count) {
 516                         printf("Some %s sockets may have been created.\n",
 517                             name);
 518                 } else {
 519                         printf(
 520         "Some %s sockets may have been created or deleted.\n",
 521                             name);
 522                 }
 523         }
 524         free(buf);
 525 }
 526
 527 /*
 528  * Dump TCP statistics structure.
 529  */
 530 void
 531 tcp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 532 {
 533         struct tcpstat tcpstat, zerostat;
 534         size_t len = sizeof tcpstat;
 535
 536 #ifdef INET6
 537         if (tcp_done != 0)
 538                 return;
 539         else
 540                 tcp_done = 1;
 541 #endif
 542
 543         if (live) {
 544                 if (zflag)
 545                         memset(&zerostat, 0, len);
 546                 if (sysctlbyname("net.inet.tcp.stats", &tcpstat, &len,
 547                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 548                         warn("sysctl: net.inet.tcp.stats");
 549                         return;
 550                 }
 551         } else
 552                 kread(off, &tcpstat, len);
 553
 554         printf ("%s:\n", name);
 555
 556 #define p(f, m) if (tcpstat.f || sflag <= 1) \
 557     printf(m, tcpstat.f, plural(tcpstat.f))
 558 #define p1a(f, m) if (tcpstat.f || sflag <= 1) \
 559     printf(m, tcpstat.f)
 560 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
 561     printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2))
 562 #define p2a(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
 563     printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2)
 564 #define p3(f, m) if (tcpstat.f || sflag <= 1) \
 565     printf(m, tcpstat.f, pluralies(tcpstat.f))
 566
 567         p(tcps_sndtotal, "\t%lu packet%s sent\n");
 568         p2(tcps_sndpack,tcps_sndbyte, "\t\t%lu data packet%s (%lu byte%s)\n");
 569         p2(tcps_sndrexmitpack, tcps_sndrexmitbyte,
 570             "\t\t%lu data packet%s (%lu byte%s) retransmitted\n");
 571         p(tcps_sndrexmitbad,
 572             "\t\t%lu data packet%s unnecessarily retransmitted\n");
 573         p(tcps_mturesent, "\t\t%lu resend%s initiated by MTU discovery\n");
 574         p2a(tcps_sndacks, tcps_delack,
 575             "\t\t%lu ack-only packet%s (%lu delayed)\n");
 576         p(tcps_sndurg, "\t\t%lu URG only packet%s\n");
 577         p(tcps_sndprobe, "\t\t%lu window probe packet%s\n");
 578         p(tcps_sndwinup, "\t\t%lu window update packet%s\n");
 579         p(tcps_sndctrl, "\t\t%lu control packet%s\n");
 580         p(tcps_rcvtotal, "\t%lu packet%s received\n");
 581         p2(tcps_rcvackpack, tcps_rcvackbyte,
 582             "\t\t%lu ack%s (for %lu byte%s)\n");
 583         p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n");
 584         p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n");
 585         p2(tcps_rcvpack, tcps_rcvbyte,
 586             "\t\t%lu packet%s (%lu byte%s) received in-sequence\n");
 587         p2(tcps_rcvduppack, tcps_rcvdupbyte,
 588             "\t\t%lu completely duplicate packet%s (%lu byte%s)\n");
 589         p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n");
 590         p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte,
 591             "\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n");
 592         p2(tcps_rcvoopack, tcps_rcvoobyte,
 593             "\t\t%lu out-of-order packet%s (%lu byte%s)\n");
 594         p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin,
 595             "\t\t%lu packet%s (%lu byte%s) of data after window\n");
 596         p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n");
 597         p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n");
 598         p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n");
 599         p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n");
 600         p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n");
 601         p1a(tcps_rcvshort, "\t\t%lu discarded because packet too short\n");
 602         p1a(tcps_rcvmemdrop, "\t\t%lu discarded due to memory problems\n");
 603         p(tcps_connattempt, "\t%lu connection request%s\n");
 604         p(tcps_accepts, "\t%lu connection accept%s\n");
 605         p(tcps_badsyn, "\t%lu bad connection attempt%s\n");
 606         p(tcps_listendrop, "\t%lu listen queue overflow%s\n");
 607         p(tcps_badrst, "\t%lu ignored RSTs in the window%s\n");
 608         p(tcps_connects, "\t%lu connection%s established (including accepts)\n");
 609         p2(tcps_closed, tcps_drops,
 610             "\t%lu connection%s closed (including %lu drop%s)\n");
 611         p(tcps_cachedrtt, "\t\t%lu connection%s updated cached RTT on close\n");
 612         p(tcps_cachedrttvar,
 613             "\t\t%lu connection%s updated cached RTT variance on close\n");
 614         p(tcps_cachedssthresh,
 615             "\t\t%lu connection%s updated cached ssthresh on close\n");
 616         p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n");
 617         p2(tcps_rttupdated, tcps_segstimed,
 618             "\t%lu segment%s updated rtt (of %lu attempt%s)\n");
 619         p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n");
 620         p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n");
 621         p(tcps_persisttimeo, "\t%lu persist timeout%s\n");
 622         p(tcps_persistdrop, "\t\t%lu connection%s dropped by persist timeout\n");
 623         p(tcps_finwait2_drops,
 624             "\t%lu Connection%s (fin_wait_2) dropped because of timeout\n");
 625         p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n");
 626         p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n");
 627         p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n");
 628         p(tcps_predack, "\t%lu correct ACK header prediction%s\n");
 629         p(tcps_preddat, "\t%lu correct data packet header prediction%s\n");
 630
 631         p3(tcps_sc_added, "\t%lu syncache entr%s added\n");
 632         p1a(tcps_sc_retransmitted, "\t\t%lu retransmitted\n");
 633         p1a(tcps_sc_dupsyn, "\t\t%lu dupsyn\n");
 634         p1a(tcps_sc_dropped, "\t\t%lu dropped\n");
 635         p1a(tcps_sc_completed, "\t\t%lu completed\n");
 636         p1a(tcps_sc_bucketoverflow, "\t\t%lu bucket overflow\n");
 637         p1a(tcps_sc_cacheoverflow, "\t\t%lu cache overflow\n");
 638         p1a(tcps_sc_reset, "\t\t%lu reset\n");
 639         p1a(tcps_sc_stale, "\t\t%lu stale\n");
 640         p1a(tcps_sc_aborted, "\t\t%lu aborted\n");
 641         p1a(tcps_sc_badack, "\t\t%lu badack\n");
 642         p1a(tcps_sc_unreach, "\t\t%lu unreach\n");
 643         p(tcps_sc_zonefail, "\t\t%lu zone failure%s\n");
 644         p(tcps_sc_sendcookie, "\t%lu cookie%s sent\n");
 645         p(tcps_sc_recvcookie, "\t%lu cookie%s received\n");
 646
 647         p(tcps_sack_recovery_episode, "\t%lu SACK recovery episode%s\n");
 648         p(tcps_sack_rexmits,
 649             "\t%lu segment rexmit%s in SACK recovery episodes\n");
 650         p(tcps_sack_rexmit_bytes,
 651             "\t%lu byte rexmit%s in SACK recovery episodes\n");
 652         p(tcps_sack_rcv_blocks,
 653             "\t%lu SACK option%s (SACK blocks) received\n");
 654         p(tcps_sack_send_blocks, "\t%lu SACK option%s (SACK blocks) sent\n");
 655         p1a(tcps_sack_sboverflow, "\t%lu SACK scoreboard overflow\n");
 656
 657 #undef p
 658 #undef p1a
 659 #undef p2
 660 #undef p2a
 661 #undef p3
 662 }
 663
 664 /*
 665  * Dump UDP statistics structure.
 666  */
 667 void
 668 udp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 669 {
 670         struct udpstat udpstat, zerostat;
 671         size_t len = sizeof udpstat;
 672         u_long delivered;
 673
 674 #ifdef INET6
 675         if (udp_done != 0)
 676                 return;
 677         else
 678                 udp_done = 1;
 679 #endif
 680
 681         if (live) {
 682                 if (zflag)
 683                         memset(&zerostat, 0, len);
 684                 if (sysctlbyname("net.inet.udp.stats", &udpstat, &len,
 685                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 686                         warn("sysctl: net.inet.udp.stats");
 687                         return;
 688                 }
 689         } else
 690                 kread(off, &udpstat, len);
 691
 692         printf("%s:\n", name);
 693 #define p(f, m) if (udpstat.f || sflag <= 1) \
 694     printf(m, udpstat.f, plural(udpstat.f))
 695 #define p1a(f, m) if (udpstat.f || sflag <= 1) \
 696     printf(m, udpstat.f)
 697         p(udps_ipackets, "\t%lu datagram%s received\n");
 698         p1a(udps_hdrops, "\t%lu with incomplete header\n");
 699         p1a(udps_badlen, "\t%lu with bad data length field\n");
 700         p1a(udps_badsum, "\t%lu with bad checksum\n");
 701         p1a(udps_nosum, "\t%lu with no checksum\n");
 702         p1a(udps_noport, "\t%lu dropped due to no socket\n");
 703         p(udps_noportbcast,
 704             "\t%lu broadcast/multicast datagram%s undelivered\n");
 705         p1a(udps_fullsock, "\t%lu dropped due to full socket buffers\n");
 706         p1a(udpps_pcbhashmiss, "\t%lu not for hashed pcb\n");
 707         delivered = udpstat.udps_ipackets -
 708                     udpstat.udps_hdrops -
 709                     udpstat.udps_badlen -
 710                     udpstat.udps_badsum -
 711                     udpstat.udps_noport -
 712                     udpstat.udps_noportbcast -
 713                     udpstat.udps_fullsock;
 714         if (delivered || sflag <= 1)
 715                 printf("\t%lu delivered\n", delivered);
 716         p(udps_opackets, "\t%lu datagram%s output\n");
 717         /* the next statistic is cumulative in udps_noportbcast */
 718         p(udps_filtermcast,
 719             "\t%lu time%s multicast source filter matched\n");
 720 #undef p
 721 #undef p1a
 722 }
 723
 724 /*
 725  * Dump CARP statistics structure.
 726  */
 727 void
 728 carp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 729 {
 730         struct carpstats carpstat, zerostat;
 731         size_t len = sizeof(struct carpstats);
 732
 733         if (live) {
 734                 if (zflag)
 735                         memset(&zerostat, 0, len);
 736                 if (sysctlbyname("net.inet.carp.stats", &carpstat, &len,
 737                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 738                         if (errno != ENOENT)
 739                                 warn("sysctl: net.inet.carp.stats");
 740                         return;
 741                 }
 742         } else {
 743                 if (off == 0)
 744                         return;
 745                 kread(off, &carpstat, len);
 746         }
 747
 748         printf("%s:\n", name);
 749
 750 #define p(f, m) if (carpstat.f || sflag <= 1) \
 751         printf(m, (uintmax_t)carpstat.f, plural(carpstat.f))
 752 #define p2(f, m) if (carpstat.f || sflag <= 1) \
 753         printf(m, (uintmax_t)carpstat.f)
 754
 755         p(carps_ipackets, "\t%ju packet%s received (IPv4)\n");
 756         p(carps_ipackets6, "\t%ju packet%s received (IPv6)\n");
 757         p(carps_badttl, "\t\t%ju packet%s discarded for wrong TTL\n");
 758         p(carps_hdrops, "\t\t%ju packet%s shorter than header\n");
 759         p(carps_badsum, "\t\t%ju discarded for bad checksum%s\n");
 760         p(carps_badver, "\t\t%ju discarded packet%s with a bad version\n");
 761         p2(carps_badlen, "\t\t%ju discarded because packet too short\n");
 762         p2(carps_badauth, "\t\t%ju discarded for bad authentication\n");
 763         p2(carps_badvhid, "\t\t%ju discarded for bad vhid\n");
 764         p2(carps_badaddrs, "\t\t%ju discarded because of a bad address list\n");
 765         p(carps_opackets, "\t%ju packet%s sent (IPv4)\n");
 766         p(carps_opackets6, "\t%ju packet%s sent (IPv6)\n");
 767         p2(carps_onomem, "\t\t%ju send failed due to mbuf memory error\n");
 768 #if notyet
 769         p(carps_ostates, "\t\t%s state update%s sent\n");
 770 #endif
 771 #undef p
 772 #undef p2
 773 }
 774
 775 /*
 776  * Dump IP statistics structure.
 777  */
 778 void
 779 ip_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 780 {
 781         struct ipstat ipstat, zerostat;
 782         size_t len = sizeof ipstat;
 783
 784         if (live) {
 785                 if (zflag)
 786                         memset(&zerostat, 0, len);
 787                 if (sysctlbyname("net.inet.ip.stats", &ipstat, &len,
 788                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 789                         warn("sysctl: net.inet.ip.stats");
 790                         return;
 791                 }
 792         } else
 793                 kread(off, &ipstat, len);
 794
 795         printf("%s:\n", name);
 796
 797 #define p(f, m) if (ipstat.f || sflag <= 1) \
 798     printf(m, ipstat.f, plural(ipstat.f))
 799 #define p1a(f, m) if (ipstat.f || sflag <= 1) \
 800     printf(m, ipstat.f)
 801
 802         p(ips_total, "\t%lu total packet%s received\n");
 803         p(ips_badsum, "\t%lu bad header checksum%s\n");
 804         p1a(ips_toosmall, "\t%lu with size smaller than minimum\n");
 805         p1a(ips_tooshort, "\t%lu with data size < data length\n");
 806         p1a(ips_toolong, "\t%lu with ip length > max ip packet size\n");
 807         p1a(ips_badhlen, "\t%lu with header length < data size\n");
 808         p1a(ips_badlen, "\t%lu with data length < header length\n");
 809         p1a(ips_badoptions, "\t%lu with bad options\n");
 810         p1a(ips_badvers, "\t%lu with incorrect version number\n");
 811         p(ips_fragments, "\t%lu fragment%s received\n");
 812         p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n");
 813         p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n");
 814         p(ips_reassembled, "\t%lu packet%s reassembled ok\n");
 815         p(ips_delivered, "\t%lu packet%s for this host\n");
 816         p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n");
 817         p(ips_forward, "\t%lu packet%s forwarded");
 818         p(ips_fastforward, " (%lu packet%s fast forwarded)");
 819         if (ipstat.ips_forward || sflag <= 1)
 820                 putchar('\n');
 821         p(ips_cantforward, "\t%lu packet%s not forwardable\n");
 822         p(ips_notmember,
 823             "\t%lu packet%s received for unknown multicast group\n");
 824         p(ips_redirectsent, "\t%lu redirect%s sent\n");
 825         p(ips_localout, "\t%lu packet%s sent from this host\n");
 826         p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n");
 827         p(ips_odropped,
 828             "\t%lu output packet%s dropped due to no bufs, etc.\n");
 829         p(ips_noroute, "\t%lu output packet%s discarded due to no route\n");
 830         p(ips_fragmented, "\t%lu output datagram%s fragmented\n");
 831         p(ips_ofragments, "\t%lu fragment%s created\n");
 832         p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n");
 833         p(ips_nogif, "\t%lu tunneling packet%s that can't find gif\n");
 834         p(ips_badaddr, "\t%lu datagram%s with bad address in header\n");
 835 #undef p
 836 #undef p1a
 837 }
 838
 839 static  const char *icmpnames[ICMP_MAXTYPE + 1] = {
 840         "echo reply",                   /* RFC 792 */
 841         "#1",
 842         "#2",
 843         "destination unreachable",      /* RFC 792 */
 844         "source quench",                /* RFC 792 */
 845         "routing redirect",             /* RFC 792 */
 846         "#6",
 847         "#7",
 848         "echo",                         /* RFC 792 */
 849         "router advertisement",         /* RFC 1256 */
 850         "router solicitation",          /* RFC 1256 */
 851         "time exceeded",                /* RFC 792 */
 852         "parameter problem",            /* RFC 792 */
 853         "time stamp",                   /* RFC 792 */
 854         "time stamp reply",             /* RFC 792 */
 855         "information request",          /* RFC 792 */
 856         "information request reply",    /* RFC 792 */
 857         "address mask request",         /* RFC 950 */
 858         "address mask reply",           /* RFC 950 */
 859         "#19",
 860         "#20",
 861         "#21",
 862         "#22",
 863         "#23",
 864         "#24",
 865         "#25",
 866         "#26",
 867         "#27",
 868         "#28",
 869         "#29",
 870         "icmp traceroute",              /* RFC 1393 */
 871         "datagram conversion error",    /* RFC 1475 */
 872         "mobile host redirect",
 873         "IPv6 where-are-you",
 874         "IPv6 i-am-here",
 875         "mobile registration req",
 876         "mobile registration reply",
 877         "domain name request",          /* RFC 1788 */
 878         "domain name reply",            /* RFC 1788 */
 879         "icmp SKIP",
 880         "icmp photuris",                /* RFC 2521 */
 881 };
 882
 883 /*
 884  * Dump ICMP statistics.
 885  */
 886 void
 887 icmp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 888 {
 889         struct icmpstat icmpstat, zerostat;
 890         int i, first;
 891         size_t len;
 892
 893         len = sizeof icmpstat;
 894         if (live) {
 895                 if (zflag)
 896                         memset(&zerostat, 0, len);
 897                 if (sysctlbyname("net.inet.icmp.stats", &icmpstat, &len,
 898                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 899                         warn("sysctl: net.inet.icmp.stats");
 900                         return;
 901                 }
 902         } else
 903                 kread(off, &icmpstat, len);
 904
 905         printf("%s:\n", name);
 906
 907 #define p(f, m) if (icmpstat.f || sflag <= 1) \
 908     printf(m, icmpstat.f, plural(icmpstat.f))
 909 #define p1a(f, m) if (icmpstat.f || sflag <= 1) \
 910     printf(m, icmpstat.f)
 911 #define p2(f, m) if (icmpstat.f || sflag <= 1) \
 912     printf(m, icmpstat.f, plurales(icmpstat.f))
 913
 914         p(icps_error, "\t%lu call%s to icmp_error\n");
 915         p(icps_oldicmp,
 916             "\t%lu error%s not generated in response to an icmp message\n");
 917         for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
 918                 if (icmpstat.icps_outhist[i] != 0) {
 919                         if (first) {
 920                                 printf("\tOutput histogram:\n");
 921                                 first = 0;
 922                         }
 923                         if (icmpnames[i] != NULL)
 924                                 printf("\t\t%s: %lu\n", icmpnames[i],
 925                                         icmpstat.icps_outhist[i]);
 926                         else
 927                                 printf("\t\tunknown ICMP #%d: %lu\n", i,
 928                                         icmpstat.icps_outhist[i]);
 929                 }
 930         p(icps_badcode, "\t%lu message%s with bad code fields\n");
 931         p(icps_tooshort, "\t%lu message%s less than the minimum length\n");
 932         p(icps_checksum, "\t%lu message%s with bad checksum\n");
 933         p(icps_badlen, "\t%lu message%s with bad length\n");
 934         p1a(icps_bmcastecho, "\t%lu multicast echo requests ignored\n");
 935         p1a(icps_bmcasttstamp, "\t%lu multicast timestamp requests ignored\n");
 936         for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
 937                 if (icmpstat.icps_inhist[i] != 0) {
 938                         if (first) {
 939                                 printf("\tInput histogram:\n");
 940                                 first = 0;
 941                         }
 942                         if (icmpnames[i] != NULL)
 943                                 printf("\t\t%s: %lu\n", icmpnames[i],
 944                                     icmpstat.icps_inhist[i]);
 945                         else
 946                                 printf("\t\tunknown ICMP #%d: %lu\n", i,
 947                                     icmpstat.icps_inhist[i]);
 948                 }
 949         p(icps_reflect, "\t%lu message response%s generated\n");
 950         p2(icps_badaddr, "\t%lu invalid return address%s\n");
 951         p(icps_noroute, "\t%lu no return route%s\n");
 952 #undef p
 953 #undef p1a
 954 #undef p2
 955         if (live) {
 956                 len = sizeof i;
 957                 if (sysctlbyname("net.inet.icmp.maskrepl", &i, &len, NULL, 0) <
 958                     0)
 959                         return;
 960                 printf("\tICMP address mask responses are %sabled\n",
 961                     i ? "en" : "dis");
 962         }
 963 }
 964
 965 /*
 966  * Dump IGMP statistics structure.
 967  */
 968 void
 969 igmp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 970 {
 971         struct igmpstat igmpstat, zerostat;
 972         size_t len = sizeof igmpstat;
 973
 974         if (live) {
 975                 if (zflag)
 976                         memset(&zerostat, 0, len);
 977                 if (sysctlbyname("net.inet.igmp.stats", &igmpstat, &len,
 978                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 979                         warn("sysctl: net.inet.igmp.stats");
 980                         return;
 981                 }
 982         } else
 983                 kread(off, &igmpstat, len);
 984
 985         printf("%s:\n", name);
 986
 987 #define p(f, m) if (igmpstat.f || sflag <= 1) \
 988     printf(m, igmpstat.f, plural(igmpstat.f))
 989 #define py(f, m) if (igmpstat.f || sflag <= 1) \
 990     printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y")
 991         p(igps_rcv_total, "\t%u message%s received\n");
 992         p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n");
 993         p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n");
 994         py(igps_rcv_queries, "\t%u membership quer%s received\n");
 995         py(igps_rcv_badqueries,
 996             "\t%u membership quer%s received with invalid field(s)\n");
 997         p(igps_rcv_reports, "\t%u membership report%s received\n");
 998         p(igps_rcv_badreports,
 999             "\t%u membership report%s received with invalid field(s)\n");
1000         p(igps_rcv_ourreports,
1001 "\t%u membership report%s received for groups to which we belong\n");
1002         p(igps_snd_reports, "\t%u membership report%s sent\n");
1003 #undef p
1004 #undef py
1005 }
1006
1007 /*
1008  * Dump PIM statistics structure.
1009  */
1010 void
1011 pim_stats(u_long off __unused, const char *name, int af1 __unused,
1012     int proto __unused)
1013 {
1014         struct pimstat pimstat, zerostat;
1015         size_t len = sizeof pimstat;
1016
1017         if (live) {
1018                 if (zflag)
1019                         memset(&zerostat, 0, len);
1020                 if (sysctlbyname("net.inet.pim.stats", &pimstat, &len,
1021                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
1022                         if (errno != ENOENT)
1023                                 warn("sysctl: net.inet.pim.stats");
1024                         return;
1025                 }
1026         } else {
1027                 if (off == 0)
1028                         return;
1029                 kread(off, &pimstat, len);
1030         }
1031
1032         printf("%s:\n", name);
1033
1034 #define p(f, m) if (pimstat.f || sflag <= 1) \
1035     printf(m, (uintmax_t)pimstat.f, plural(pimstat.f))
1036 #define py(f, m) if (pimstat.f || sflag <= 1) \
1037     printf(m, (uintmax_t)pimstat.f, pimstat.f != 1 ? "ies" : "y")
1038         p(pims_rcv_total_msgs, "\t%ju message%s received\n");
1039         p(pims_rcv_total_bytes, "\t%ju byte%s received\n");
1040         p(pims_rcv_tooshort, "\t%ju message%s received with too few bytes\n");
1041         p(pims_rcv_badsum, "\t%ju message%s received with bad checksum\n");
1042         p(pims_rcv_badversion, "\t%ju message%s received with bad version\n");
1043         p(pims_rcv_registers_msgs, "\t%ju data register message%s received\n");
1044         p(pims_rcv_registers_bytes, "\t%ju data register byte%s received\n");
1045         p(pims_rcv_registers_wrongiif,
1046             "\t%ju data register message%s received on wrong iif\n");
1047         p(pims_rcv_badregisters, "\t%ju bad register%s received\n");
1048         p(pims_snd_registers_msgs, "\t%ju data register message%s sent\n");
1049         p(pims_snd_registers_bytes, "\t%ju data register byte%s sent\n");
1050 #undef p
1051 #undef py
1052 }
1053
1054 /*
1055  * Pretty print an Internet address (net address + port).
1056  */
1057 void
1058 inetprint(struct in_addr *in, int port, const char *proto, int num_port)
1059 {
1060         struct servent *sp = 0;
1061         char line[80], *cp;
1062         int width;
1063
1064         if (Wflag)
1065             sprintf(line, "%s.", inetname(in));
1066         else
1067             sprintf(line, "%.*s.", (Aflag && !num_port) ? 12 : 16, inetname(in));
1068         cp = index(line, '\0');
1069         if (!num_port && port)
1070                 sp = getservbyport((int)port, proto);
1071         if (sp || port == 0)
1072                 sprintf(cp, "%.15s ", sp ? sp->s_name : "*");
1073         else
1074                 sprintf(cp, "%d ", ntohs((u_short)port));
1075         width = (Aflag && !Wflag) ? 18 : 22;
1076         if (Wflag)
1077             printf("%-*s ", width, line);
1078         else
1079             printf("%-*.*s ", width, width, line);
1080 }
1081
1082 /*
1083  * Construct an Internet address representation.
1084  * If numeric_addr has been supplied, give
1085  * numeric value, otherwise try for symbolic name.
1086  */
1087 char *
1088 inetname(struct in_addr *inp)
1089 {
1090         char *cp;
1091         static char line[MAXHOSTNAMELEN];
1092         struct hostent *hp;
1093         struct netent *np;
1094
1095         cp = 0;
1096         if (!numeric_addr && inp->s_addr != INADDR_ANY) {
1097                 int net = inet_netof(*inp);
1098                 int lna = inet_lnaof(*inp);
1099
1100                 if (lna == INADDR_ANY) {
1101                         np = getnetbyaddr(net, AF_INET);
1102                         if (np)
1103                                 cp = np->n_name;
1104                 }
1105                 if (cp == 0) {
1106                         hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET);
1107                         if (hp) {
1108                                 cp = hp->h_name;
1109                                 trimdomain(cp, strlen(cp));
1110                         }
1111                 }
1112         }
1113         if (inp->s_addr == INADDR_ANY)
1114                 strcpy(line, "*");
1115         else if (cp) {
1116                 strncpy(line, cp, sizeof(line) - 1);
1117                 line[sizeof(line) - 1] = '\0';
1118         } else {
1119                 inp->s_addr = ntohl(inp->s_addr);
1120 #define C(x)    ((u_int)((x) & 0xff))
1121                 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24),
1122                     C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr));
1123         }
1124         return (line);
1125 }