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 <net/if_arp.h>
  53 #include <netinet/in.h>
  54 #include <netinet/in_systm.h>
  55 #include <netinet/ip.h>
  56 #include <netinet/ip_carp.h>
  57 #ifdef INET6
  58 #include <netinet/ip6.h>
  59 #endif /* INET6 */
  60 #include <netinet/in_pcb.h>
  61 #include <netinet/ip_icmp.h>
  62 #include <netinet/icmp_var.h>
  63 #include <netinet/igmp_var.h>
  64 #include <netinet/ip_var.h>
  65 #include <netinet/pim_var.h>
  66 #include <netinet/tcp.h>
  67 #include <netinet/tcpip.h>
  68 #include <netinet/tcp_seq.h>
  69 #define TCPSTATES
  70 #include <netinet/tcp_fsm.h>
  71 #include <netinet/tcp_timer.h>
  72 #include <netinet/tcp_var.h>
  73 #include <netinet/tcp_debug.h>
  74 #include <netinet/udp.h>
  75 #include <netinet/udp_var.h>
  76
  77 #include <arpa/inet.h>
  78 #include <err.h>
  79 #include <errno.h>
  80 #include <libutil.h>
  81 #include <netdb.h>
  82 #include <stdint.h>
  83 #include <stdio.h>
  84 #include <stdlib.h>
  85 #include <string.h>
  86 #include <unistd.h>
  87 #include "netstat.h"
  88
  89 char    *inetname(struct in_addr *);
  90 void    inetprint(struct in_addr *, int, const char *, int);
  91 #ifdef INET6
  92 static int udp_done, tcp_done;
  93 #endif /* INET6 */
  94
  95 static int
  96 pcblist_sysctl(int proto, char **bufp, int istcp)
  97 {
  98         const char *mibvar;
  99         char *buf;
 100         size_t len;
 101
 102         switch (proto) {
 103         case IPPROTO_TCP:
 104                 mibvar = "net.inet.tcp.pcblist";
 105                 break;
 106         case IPPROTO_UDP:
 107                 mibvar = "net.inet.udp.pcblist";
 108                 break;
 109         case IPPROTO_DIVERT:
 110                 mibvar = "net.inet.divert.pcblist";
 111                 break;
 112         default:
 113                 mibvar = "net.inet.raw.pcblist";
 114                 break;
 115         }
 116
 117         len = 0;
 118         if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
 119                 if (errno != ENOENT)
 120                         warn("sysctl: %s", mibvar);
 121                 return (0);
 122         }
 123         if ((buf = malloc(len)) == 0) {
 124                 warnx("malloc %lu bytes", (u_long)len);
 125                 return (0);
 126         }
 127         if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
 128                 warn("sysctl: %s", mibvar);
 129                 free(buf);
 130                 return (0);
 131         }
 132         *bufp = buf;
 133         return (1);
 134 }
 135
 136 /*
 137  * Copied directly from uipc_socket2.c.  We leave out some fields that are in
 138  * nested structures that aren't used to avoid extra work.
 139  */
 140 static void
 141 sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb)
 142 {
 143         xsb->sb_cc = sb->sb_cc;
 144         xsb->sb_hiwat = sb->sb_hiwat;
 145         xsb->sb_mbcnt = sb->sb_mbcnt;
 146         xsb->sb_mcnt = sb->sb_mcnt;
 147         xsb->sb_ccnt = sb->sb_ccnt;
 148         xsb->sb_mbmax = sb->sb_mbmax;
 149         xsb->sb_lowat = sb->sb_lowat;
 150         xsb->sb_flags = sb->sb_flags;
 151         xsb->sb_timeo = sb->sb_timeo;
 152 }
 153
 154 int
 155 sotoxsocket(struct socket *so, struct xsocket *xso)
 156 {
 157         struct protosw proto;
 158         struct domain domain;
 159
 160         bzero(xso, sizeof *xso);
 161         xso->xso_len = sizeof *xso;
 162         xso->xso_so = so;
 163         xso->so_type = so->so_type;
 164         xso->so_options = so->so_options;
 165         xso->so_linger = so->so_linger;
 166         xso->so_state = so->so_state;
 167         xso->so_pcb = so->so_pcb;
 168         if (kread((uintptr_t)so->so_proto, &proto, sizeof(proto)) != 0)
 169                 return (-1);
 170         xso->xso_protocol = proto.pr_protocol;
 171         if (kread((uintptr_t)proto.pr_domain, &domain, sizeof(domain)) != 0)
 172                 return (-1);
 173         xso->xso_family = domain.dom_family;
 174         xso->so_qlen = so->so_qlen;
 175         xso->so_incqlen = so->so_incqlen;
 176         xso->so_qlimit = so->so_qlimit;
 177         xso->so_timeo = so->so_timeo;
 178         xso->so_error = so->so_error;
 179         xso->so_oobmark = so->so_oobmark;
 180         sbtoxsockbuf(&so->so_snd, &xso->so_snd);
 181         sbtoxsockbuf(&so->so_rcv, &xso->so_rcv);
 182         return (0);
 183 }
 184
 185 static int
 186 pcblist_kvm(u_long off, char **bufp, int istcp)
 187 {
 188         struct inpcbinfo pcbinfo;
 189         struct inpcbhead listhead;
 190         struct inpcb *inp;
 191         struct xinpcb xi;
 192         struct xinpgen xig;
 193         struct xtcpcb xt;
 194         struct socket so;
 195         struct xsocket *xso;
 196         char *buf, *p;
 197         size_t len;
 198
 199         if (off == 0)
 200                 return (0);
 201         kread(off, &pcbinfo, sizeof(pcbinfo));
 202         if (istcp)
 203                 len = 2 * sizeof(xig) +
 204                     (pcbinfo.ipi_count + pcbinfo.ipi_count / 8) *
 205                     sizeof(struct xtcpcb);
 206         else
 207                 len = 2 * sizeof(xig) +
 208                     (pcbinfo.ipi_count + pcbinfo.ipi_count / 8) *
 209                     sizeof(struct xinpcb);
 210         if ((buf = malloc(len)) == 0) {
 211                 warnx("malloc %lu bytes", (u_long)len);
 212                 return (0);
 213         }
 214         p = buf;
 215
 216 #define COPYOUT(obj, size) do {                                         \
 217         if (len < (size)) {                                             \
 218                 warnx("buffer size exceeded");                          \
 219                 goto fail;                                              \
 220         }                                                               \
 221         bcopy((obj), p, (size));                                        \
 222         len -= (size);                                                  \
 223         p += (size);                                                    \
 224 } while (0)
 225
 226 #define KREAD(off, buf, len) do {                                       \
 227         if (kread((uintptr_t)(off), (buf), (len)) != 0)                 \
 228                 goto fail;                                              \
 229 } while (0)
 230
 231         /* Write out header. */
 232         xig.xig_len = sizeof xig;
 233         xig.xig_count = pcbinfo.ipi_count;
 234         xig.xig_gen = pcbinfo.ipi_gencnt;
 235         xig.xig_sogen = 0;
 236         COPYOUT(&xig, sizeof xig);
 237
 238         /* Walk the PCB list. */
 239         xt.xt_len = sizeof xt;
 240         xi.xi_len = sizeof xi;
 241         if (istcp)
 242                 xso = &xt.xt_socket;
 243         else
 244                 xso = &xi.xi_socket;
 245         KREAD(pcbinfo.ipi_listhead, &listhead, sizeof(listhead));
 246         LIST_FOREACH(inp, &listhead, inp_list) {
 247                 if (istcp) {
 248                         KREAD(inp, &xt.xt_inp, sizeof(*inp));
 249                         inp = &xt.xt_inp;
 250                 } else {
 251                         KREAD(inp, &xi.xi_inp, sizeof(*inp));
 252                         inp = &xi.xi_inp;
 253                 }
 254
 255                 if (inp->inp_gencnt > pcbinfo.ipi_gencnt)
 256                         continue;
 257
 258                 if (istcp) {
 259                         if (inp->inp_ppcb == NULL)
 260                                 bzero(&xt.xt_tp, sizeof xt.xt_tp);
 261                         else if (inp->inp_flags & INP_TIMEWAIT) {
 262                                 bzero(&xt.xt_tp, sizeof xt.xt_tp);
 263                                 xt.xt_tp.t_state = TCPS_TIME_WAIT;
 264                         } else
 265                                 KREAD(inp->inp_ppcb, &xt.xt_tp,
 266                                     sizeof xt.xt_tp);
 267                 }
 268                 if (inp->inp_socket) {
 269                         KREAD(inp->inp_socket, &so, sizeof(so));
 270                         if (sotoxsocket(&so, xso) != 0)
 271                                 goto fail;
 272                 } else {
 273                         bzero(xso, sizeof(*xso));
 274                         if (istcp)
 275                                 xso->xso_protocol = IPPROTO_TCP;
 276                 }
 277                 if (istcp)
 278                         COPYOUT(&xt, sizeof xt);
 279                 else
 280                         COPYOUT(&xi, sizeof xi);
 281         }
 282
 283         /* Reread the pcbinfo and write out the footer. */
 284         kread(off, &pcbinfo, sizeof(pcbinfo));
 285         xig.xig_count = pcbinfo.ipi_count;
 286         xig.xig_gen = pcbinfo.ipi_gencnt;
 287         COPYOUT(&xig, sizeof xig);
 288
 289         *bufp = buf;
 290         return (1);
 291
 292 fail:
 293         free(buf);
 294         return (0);
 295 #undef COPYOUT
 296 #undef KREAD
 297 }
 298
 299 /*
 300  * Print a summary of connections related to an Internet
 301  * protocol.  For TCP, also give state of connection.
 302  * Listening processes (aflag) are suppressed unless the
 303  * -a (all) flag is specified.
 304  */
 305 void
 306 protopr(u_long off, const char *name, int af1, int proto)
 307 {
 308         int istcp;
 309         static int first = 1;
 310         char *buf;
 311         const char *vchar;
 312         struct tcpcb *tp = NULL;
 313         struct inpcb *inp;
 314         struct xinpgen *xig, *oxig;
 315         struct xsocket *so;
 316
 317         istcp = 0;
 318         switch (proto) {
 319         case IPPROTO_TCP:
 320 #ifdef INET6
 321                 if (tcp_done != 0)
 322                         return;
 323                 else
 324                         tcp_done = 1;
 325 #endif
 326                 istcp = 1;
 327                 break;
 328         case IPPROTO_UDP:
 329 #ifdef INET6
 330                 if (udp_done != 0)
 331                         return;
 332                 else
 333                         udp_done = 1;
 334 #endif
 335                 break;
 336         }
 337         if (live) {
 338                 if (!pcblist_sysctl(proto, &buf, istcp))
 339                         return;
 340         } else {
 341                 if (!pcblist_kvm(off, &buf, istcp))
 342                         return;
 343         }
 344
 345         oxig = xig = (struct xinpgen *)buf;
 346         for (xig = (struct xinpgen *)((char *)xig + xig->xig_len);
 347              xig->xig_len > sizeof(struct xinpgen);
 348              xig = (struct xinpgen *)((char *)xig + xig->xig_len)) {
 349                 if (istcp) {
 350                         tp = &((struct xtcpcb *)xig)->xt_tp;
 351                         inp = &((struct xtcpcb *)xig)->xt_inp;
 352                         so = &((struct xtcpcb *)xig)->xt_socket;
 353                 } else {
 354                         inp = &((struct xinpcb *)xig)->xi_inp;
 355                         so = &((struct xinpcb *)xig)->xi_socket;
 356                 }
 357
 358                 /* Ignore sockets for protocols other than the desired one. */
 359                 if (so->xso_protocol != proto)
 360                         continue;
 361
 362                 /* Ignore PCBs which were freed during copyout. */
 363                 if (inp->inp_gencnt > oxig->xig_gen)
 364                         continue;
 365
 366                 if ((af1 == AF_INET && (inp->inp_vflag & INP_IPV4) == 0)
 367 #ifdef INET6
 368                     || (af1 == AF_INET6 && (inp->inp_vflag & INP_IPV6) == 0)
 369 #endif /* INET6 */
 370                     || (af1 == AF_UNSPEC && ((inp->inp_vflag & INP_IPV4) == 0
 371 #ifdef INET6
 372                                           && (inp->inp_vflag & INP_IPV6) == 0
 373 #endif /* INET6 */
 374                         ))
 375                     )
 376                         continue;
 377                 if (!aflag &&
 378                     (
 379                      (istcp && tp->t_state == TCPS_LISTEN)
 380                      || (af1 == AF_INET &&
 381                       inet_lnaof(inp->inp_laddr) == INADDR_ANY)
 382 #ifdef INET6
 383                      || (af1 == AF_INET6 &&
 384                          IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 385 #endif /* INET6 */
 386                      || (af1 == AF_UNSPEC &&
 387                          (((inp->inp_vflag & INP_IPV4) != 0 &&
 388                            inet_lnaof(inp->inp_laddr) == INADDR_ANY)
 389 #ifdef INET6
 390                           || ((inp->inp_vflag & INP_IPV6) != 0 &&
 391                               IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
 392 #endif
 393                           ))
 394                      ))
 395                         continue;
 396
 397                 if (first) {
 398                         if (!Lflag) {
 399                                 printf("Active Internet connections");
 400                                 if (aflag)
 401                                         printf(" (including servers)");
 402                         } else
 403                                 printf(
 404         "Current listen queue sizes (qlen/incqlen/maxqlen)");
 405                         putchar('\n');
 406                         if (Aflag)
 407                                 printf("%-8.8s ", "Tcpcb");
 408                         if (Lflag)
 409                                 printf("%-5.5s %-14.14s %-22.22s\n",
 410                                     "Proto", "Listen", "Local Address");
 411                         if (Tflag)
 412                                 printf((Aflag && !Wflag) ?
 413                             "%-5.5s %-6.6s %-6.6s %-6.6s %-18.18s %s\n" :
 414                             "%-5.5s %-6.6s %-6.6s %-6.6s %-22.22s %s\n",
 415                                     "Proto", "Rexmit", "OOORcv", "0-win",
 416                                     "Local Address", "Foreign Address");
 417                         if (xflag) {
 418                                 printf("%-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s ",
 419                                        "R-MBUF", "S-MBUF", "R-CLUS",
 420                                        "S-CLUS", "R-HIWA", "S-HIWA",
 421                                        "R-LOWA", "S-LOWA", "R-BCNT",
 422                                        "S-BCNT", "R-BMAX", "S-BMAX");
 423                                 printf("%7.7s %7.7s %7.7s %7.7s %7.7s %7.7s\n",
 424                                        "rexmt", "persist", "keep",
 425                                        "2msl", "delack", "rcvtime");
 426                         }
 427                         if (!xflag && !Tflag) {
 428                                 printf((Aflag && !Wflag) ?
 429                                        "%-5.5s %-6.6s %-6.6s  %-18.18s %-18.18s" :
 430                                        "%-5.5s %-6.6s %-6.6s  %-22.22s %-22.22s",
 431                                        "Proto", "Recv-Q", "Send-Q",
 432                                        "Local Address", "Foreign Address");
 433                                 printf("(state)\n");
 434                         }
 435                         first = 0;
 436                 }
 437                 if (Lflag && so->so_qlimit == 0)
 438                         continue;
 439                 if (Aflag) {
 440                         if (istcp)
 441                                 printf("%8lx ", (u_long)inp->inp_ppcb);
 442                         else
 443                                 printf("%8lx ", (u_long)so->so_pcb);
 444                 }
 445 #ifdef INET6
 446                 if ((inp->inp_vflag & INP_IPV6) != 0)
 447                         vchar = ((inp->inp_vflag & INP_IPV4) != 0) ?
 448                             "46" : "6 ";
 449                 else
 450 #endif
 451                 vchar = ((inp->inp_vflag & INP_IPV4) != 0) ?
 452                     "4 " : "  ";
 453                 printf("%-3.3s%-2.2s ", name, vchar);
 454                 if (Lflag) {
 455                         char buf1[15];
 456
 457                         snprintf(buf1, 15, "%d/%d/%d", so->so_qlen,
 458                             so->so_incqlen, so->so_qlimit);
 459                         printf("%-14.14s ", buf1);
 460                 } else if (Tflag) {
 461                         if (istcp)
 462                                 printf("%6u %6u %6u ", tp->t_sndrexmitpack,
 463                                        tp->t_rcvoopack, tp->t_sndzerowin);
 464                 } else {
 465                         printf("%6u %6u ", so->so_rcv.sb_cc, so->so_snd.sb_cc);
 466                 }
 467                 if (numeric_port) {
 468                         if (inp->inp_vflag & INP_IPV4) {
 469                                 inetprint(&inp->inp_laddr, (int)inp->inp_lport,
 470                                     name, 1);
 471                                 if (!Lflag)
 472                                         inetprint(&inp->inp_faddr,
 473                                             (int)inp->inp_fport, name, 1);
 474                         }
 475 #ifdef INET6
 476                         else if (inp->inp_vflag & INP_IPV6) {
 477                                 inet6print(&inp->in6p_laddr,
 478                                     (int)inp->inp_lport, name, 1);
 479                                 if (!Lflag)
 480                                         inet6print(&inp->in6p_faddr,
 481                                             (int)inp->inp_fport, name, 1);
 482                         } /* else nothing printed now */
 483 #endif /* INET6 */
 484                 } else if (inp->inp_flags & INP_ANONPORT) {
 485                         if (inp->inp_vflag & INP_IPV4) {
 486                                 inetprint(&inp->inp_laddr, (int)inp->inp_lport,
 487                                     name, 1);
 488                                 if (!Lflag)
 489                                         inetprint(&inp->inp_faddr,
 490                                             (int)inp->inp_fport, name, 0);
 491                         }
 492 #ifdef INET6
 493                         else if (inp->inp_vflag & INP_IPV6) {
 494                                 inet6print(&inp->in6p_laddr,
 495                                     (int)inp->inp_lport, name, 1);
 496                                 if (!Lflag)
 497                                         inet6print(&inp->in6p_faddr,
 498                                             (int)inp->inp_fport, name, 0);
 499                         } /* else nothing printed now */
 500 #endif /* INET6 */
 501                 } else {
 502                         if (inp->inp_vflag & INP_IPV4) {
 503                                 inetprint(&inp->inp_laddr, (int)inp->inp_lport,
 504                                     name, 0);
 505                                 if (!Lflag)
 506                                         inetprint(&inp->inp_faddr,
 507                                             (int)inp->inp_fport, name,
 508                                             inp->inp_lport != inp->inp_fport);
 509                         }
 510 #ifdef INET6
 511                         else if (inp->inp_vflag & INP_IPV6) {
 512                                 inet6print(&inp->in6p_laddr,
 513                                     (int)inp->inp_lport, name, 0);
 514                                 if (!Lflag)
 515                                         inet6print(&inp->in6p_faddr,
 516                                             (int)inp->inp_fport, name,
 517                                             inp->inp_lport != inp->inp_fport);
 518                         } /* else nothing printed now */
 519 #endif /* INET6 */
 520                 }
 521                 if (xflag) {
 522                         if (Lflag)
 523                                 printf("%21s %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u ",
 524                                        " ",
 525                                        so->so_rcv.sb_mcnt, so->so_snd.sb_mcnt,
 526                                        so->so_rcv.sb_ccnt, so->so_snd.sb_ccnt,
 527                                        so->so_rcv.sb_hiwat, so->so_snd.sb_hiwat,
 528                                        so->so_rcv.sb_lowat, so->so_snd.sb_lowat,
 529                                        so->so_rcv.sb_mbcnt, so->so_snd.sb_mbcnt,
 530                                        so->so_rcv.sb_mbmax, so->so_snd.sb_mbmax);
 531                         else
 532                                 printf("%6u %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u ",
 533                                        so->so_rcv.sb_mcnt, so->so_snd.sb_mcnt,
 534                                        so->so_rcv.sb_ccnt, so->so_snd.sb_ccnt,
 535                                        so->so_rcv.sb_hiwat, so->so_snd.sb_hiwat,
 536                                        so->so_rcv.sb_lowat, so->so_snd.sb_lowat,
 537                                        so->so_rcv.sb_mbcnt, so->so_snd.sb_mbcnt,
 538                                        so->so_rcv.sb_mbmax, so->so_snd.sb_mbmax);
 539                 }
 540                 if (istcp && !Lflag && !xflag && !Tflag) {
 541                         if (tp->t_state < 0 || tp->t_state >= TCP_NSTATES)
 542                                 printf("%d", tp->t_state);
 543                         else {
 544                                 printf("%s", tcpstates[tp->t_state]);
 545 #if defined(TF_NEEDSYN) && defined(TF_NEEDFIN)
 546                                 /* Show T/TCP `hidden state' */
 547                                 if (tp->t_flags & (TF_NEEDSYN|TF_NEEDFIN))
 548                                         putchar('*');
 549 #endif /* defined(TF_NEEDSYN) && defined(TF_NEEDFIN) */
 550                         }
 551                 }
 552                 putchar('\n');
 553         }
 554         if (xig != oxig && xig->xig_gen != oxig->xig_gen) {
 555                 if (oxig->xig_count > xig->xig_count) {
 556                         printf("Some %s sockets may have been deleted.\n",
 557                             name);
 558                 } else if (oxig->xig_count < xig->xig_count) {
 559                         printf("Some %s sockets may have been created.\n",
 560                             name);
 561                 } else {
 562                         printf(
 563         "Some %s sockets may have been created or deleted.\n",
 564                             name);
 565                 }
 566         }
 567         free(buf);
 568 }
 569
 570 /*
 571  * Dump TCP statistics structure.
 572  */
 573 void
 574 tcp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 575 {
 576         struct tcpstat tcpstat, zerostat;
 577         size_t len = sizeof tcpstat;
 578
 579 #ifdef INET6
 580         if (tcp_done != 0)
 581                 return;
 582         else
 583                 tcp_done = 1;
 584 #endif
 585
 586         if (live) {
 587                 if (zflag)
 588                         memset(&zerostat, 0, len);
 589                 if (sysctlbyname("net.inet.tcp.stats", &tcpstat, &len,
 590                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 591                         warn("sysctl: net.inet.tcp.stats");
 592                         return;
 593                 }
 594         } else
 595                 kread(off, &tcpstat, len);
 596
 597         printf ("%s:\n", name);
 598
 599 #define p(f, m) if (tcpstat.f || sflag <= 1) \
 600     printf(m, tcpstat.f, plural(tcpstat.f))
 601 #define p1a(f, m) if (tcpstat.f || sflag <= 1) \
 602     printf(m, tcpstat.f)
 603 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
 604     printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2))
 605 #define p2a(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
 606     printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2)
 607 #define p3(f, m) if (tcpstat.f || sflag <= 1) \
 608     printf(m, tcpstat.f, pluralies(tcpstat.f))
 609
 610         p(tcps_sndtotal, "\t%lu packet%s sent\n");
 611         p2(tcps_sndpack,tcps_sndbyte, "\t\t%lu data packet%s (%lu byte%s)\n");
 612         p2(tcps_sndrexmitpack, tcps_sndrexmitbyte,
 613             "\t\t%lu data packet%s (%lu byte%s) retransmitted\n");
 614         p(tcps_sndrexmitbad,
 615             "\t\t%lu data packet%s unnecessarily retransmitted\n");
 616         p(tcps_mturesent, "\t\t%lu resend%s initiated by MTU discovery\n");
 617         p2a(tcps_sndacks, tcps_delack,
 618             "\t\t%lu ack-only packet%s (%lu delayed)\n");
 619         p(tcps_sndurg, "\t\t%lu URG only packet%s\n");
 620         p(tcps_sndprobe, "\t\t%lu window probe packet%s\n");
 621         p(tcps_sndwinup, "\t\t%lu window update packet%s\n");
 622         p(tcps_sndctrl, "\t\t%lu control packet%s\n");
 623         p(tcps_rcvtotal, "\t%lu packet%s received\n");
 624         p2(tcps_rcvackpack, tcps_rcvackbyte,
 625             "\t\t%lu ack%s (for %lu byte%s)\n");
 626         p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n");
 627         p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n");
 628         p2(tcps_rcvpack, tcps_rcvbyte,
 629             "\t\t%lu packet%s (%lu byte%s) received in-sequence\n");
 630         p2(tcps_rcvduppack, tcps_rcvdupbyte,
 631             "\t\t%lu completely duplicate packet%s (%lu byte%s)\n");
 632         p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n");
 633         p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte,
 634             "\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n");
 635         p2(tcps_rcvoopack, tcps_rcvoobyte,
 636             "\t\t%lu out-of-order packet%s (%lu byte%s)\n");
 637         p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin,
 638             "\t\t%lu packet%s (%lu byte%s) of data after window\n");
 639         p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n");
 640         p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n");
 641         p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n");
 642         p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n");
 643         p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n");
 644         p1a(tcps_rcvshort, "\t\t%lu discarded because packet too short\n");
 645         p1a(tcps_rcvmemdrop, "\t\t%lu discarded due to memory problems\n");
 646         p(tcps_connattempt, "\t%lu connection request%s\n");
 647         p(tcps_accepts, "\t%lu connection accept%s\n");
 648         p(tcps_badsyn, "\t%lu bad connection attempt%s\n");
 649         p(tcps_listendrop, "\t%lu listen queue overflow%s\n");
 650         p(tcps_badrst, "\t%lu ignored RSTs in the window%s\n");
 651         p(tcps_connects, "\t%lu connection%s established (including accepts)\n");
 652         p2(tcps_closed, tcps_drops,
 653             "\t%lu connection%s closed (including %lu drop%s)\n");
 654         p(tcps_cachedrtt, "\t\t%lu connection%s updated cached RTT on close\n");
 655         p(tcps_cachedrttvar,
 656             "\t\t%lu connection%s updated cached RTT variance on close\n");
 657         p(tcps_cachedssthresh,
 658             "\t\t%lu connection%s updated cached ssthresh on close\n");
 659         p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n");
 660         p2(tcps_rttupdated, tcps_segstimed,
 661             "\t%lu segment%s updated rtt (of %lu attempt%s)\n");
 662         p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n");
 663         p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n");
 664         p(tcps_persisttimeo, "\t%lu persist timeout%s\n");
 665         p(tcps_persistdrop, "\t\t%lu connection%s dropped by persist timeout\n");
 666         p(tcps_finwait2_drops,
 667             "\t%lu Connection%s (fin_wait_2) dropped because of timeout\n");
 668         p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n");
 669         p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n");
 670         p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n");
 671         p(tcps_predack, "\t%lu correct ACK header prediction%s\n");
 672         p(tcps_preddat, "\t%lu correct data packet header prediction%s\n");
 673
 674         p3(tcps_sc_added, "\t%lu syncache entr%s added\n");
 675         p1a(tcps_sc_retransmitted, "\t\t%lu retransmitted\n");
 676         p1a(tcps_sc_dupsyn, "\t\t%lu dupsyn\n");
 677         p1a(tcps_sc_dropped, "\t\t%lu dropped\n");
 678         p1a(tcps_sc_completed, "\t\t%lu completed\n");
 679         p1a(tcps_sc_bucketoverflow, "\t\t%lu bucket overflow\n");
 680         p1a(tcps_sc_cacheoverflow, "\t\t%lu cache overflow\n");
 681         p1a(tcps_sc_reset, "\t\t%lu reset\n");
 682         p1a(tcps_sc_stale, "\t\t%lu stale\n");
 683         p1a(tcps_sc_aborted, "\t\t%lu aborted\n");
 684         p1a(tcps_sc_badack, "\t\t%lu badack\n");
 685         p1a(tcps_sc_unreach, "\t\t%lu unreach\n");
 686         p(tcps_sc_zonefail, "\t\t%lu zone failure%s\n");
 687         p(tcps_sc_sendcookie, "\t%lu cookie%s sent\n");
 688         p(tcps_sc_recvcookie, "\t%lu cookie%s received\n");
 689
 690         p(tcps_sack_recovery_episode, "\t%lu SACK recovery episode%s\n");
 691         p(tcps_sack_rexmits,
 692             "\t%lu segment rexmit%s in SACK recovery episodes\n");
 693         p(tcps_sack_rexmit_bytes,
 694             "\t%lu byte rexmit%s in SACK recovery episodes\n");
 695         p(tcps_sack_rcv_blocks,
 696             "\t%lu SACK option%s (SACK blocks) received\n");
 697         p(tcps_sack_send_blocks, "\t%lu SACK option%s (SACK blocks) sent\n");
 698         p1a(tcps_sack_sboverflow, "\t%lu SACK scoreboard overflow\n");
 699
 700         p(tcps_ecn_ce, "\t%lu packet%s with ECN CE bit set\n");
 701         p(tcps_ecn_ect0, "\t%lu packet%s with ECN ECT(0) bit set\n");
 702         p(tcps_ecn_ect1, "\t%lu packet%s with ECN ECT(1) bit set\n");
 703         p(tcps_ecn_shs, "\t%lu successful ECN handshake%s\n");
 704         p(tcps_ecn_rcwnd, "\t%lu time%s ECN reduced the congestion window\n");
 705 #undef p
 706 #undef p1a
 707 #undef p2
 708 #undef p2a
 709 #undef p3
 710 }
 711
 712 /*
 713  * Dump UDP statistics structure.
 714  */
 715 void
 716 udp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 717 {
 718         struct udpstat udpstat, zerostat;
 719         size_t len = sizeof udpstat;
 720         u_long delivered;
 721
 722 #ifdef INET6
 723         if (udp_done != 0)
 724                 return;
 725         else
 726                 udp_done = 1;
 727 #endif
 728
 729         if (live) {
 730                 if (zflag)
 731                         memset(&zerostat, 0, len);
 732                 if (sysctlbyname("net.inet.udp.stats", &udpstat, &len,
 733                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 734                         warn("sysctl: net.inet.udp.stats");
 735                         return;
 736                 }
 737         } else
 738                 kread(off, &udpstat, len);
 739
 740         printf("%s:\n", name);
 741 #define p(f, m) if (udpstat.f || sflag <= 1) \
 742     printf(m, udpstat.f, plural(udpstat.f))
 743 #define p1a(f, m) if (udpstat.f || sflag <= 1) \
 744     printf(m, udpstat.f)
 745         p(udps_ipackets, "\t%lu datagram%s received\n");
 746         p1a(udps_hdrops, "\t%lu with incomplete header\n");
 747         p1a(udps_badlen, "\t%lu with bad data length field\n");
 748         p1a(udps_badsum, "\t%lu with bad checksum\n");
 749         p1a(udps_nosum, "\t%lu with no checksum\n");
 750         p1a(udps_noport, "\t%lu dropped due to no socket\n");
 751         p(udps_noportbcast,
 752             "\t%lu broadcast/multicast datagram%s undelivered\n");
 753         p1a(udps_fullsock, "\t%lu dropped due to full socket buffers\n");
 754         p1a(udpps_pcbhashmiss, "\t%lu not for hashed pcb\n");
 755         delivered = udpstat.udps_ipackets -
 756                     udpstat.udps_hdrops -
 757                     udpstat.udps_badlen -
 758                     udpstat.udps_badsum -
 759                     udpstat.udps_noport -
 760                     udpstat.udps_noportbcast -
 761                     udpstat.udps_fullsock;
 762         if (delivered || sflag <= 1)
 763                 printf("\t%lu delivered\n", delivered);
 764         p(udps_opackets, "\t%lu datagram%s output\n");
 765         /* the next statistic is cumulative in udps_noportbcast */
 766         p(udps_filtermcast,
 767             "\t%lu time%s multicast source filter matched\n");
 768 #undef p
 769 #undef p1a
 770 }
 771
 772 /*
 773  * Dump CARP statistics structure.
 774  */
 775 void
 776 carp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 777 {
 778         struct carpstats carpstat, zerostat;
 779         size_t len = sizeof(struct carpstats);
 780
 781         if (live) {
 782                 if (zflag)
 783                         memset(&zerostat, 0, len);
 784                 if (sysctlbyname("net.inet.carp.stats", &carpstat, &len,
 785                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 786                         if (errno != ENOENT)
 787                                 warn("sysctl: net.inet.carp.stats");
 788                         return;
 789                 }
 790         } else {
 791                 if (off == 0)
 792                         return;
 793                 kread(off, &carpstat, len);
 794         }
 795
 796         printf("%s:\n", name);
 797
 798 #define p(f, m) if (carpstat.f || sflag <= 1) \
 799         printf(m, (uintmax_t)carpstat.f, plural(carpstat.f))
 800 #define p2(f, m) if (carpstat.f || sflag <= 1) \
 801         printf(m, (uintmax_t)carpstat.f)
 802
 803         p(carps_ipackets, "\t%ju packet%s received (IPv4)\n");
 804         p(carps_ipackets6, "\t%ju packet%s received (IPv6)\n");
 805         p(carps_badttl, "\t\t%ju packet%s discarded for wrong TTL\n");
 806         p(carps_hdrops, "\t\t%ju packet%s shorter than header\n");
 807         p(carps_badsum, "\t\t%ju discarded for bad checksum%s\n");
 808         p(carps_badver, "\t\t%ju discarded packet%s with a bad version\n");
 809         p2(carps_badlen, "\t\t%ju discarded because packet too short\n");
 810         p2(carps_badauth, "\t\t%ju discarded for bad authentication\n");
 811         p2(carps_badvhid, "\t\t%ju discarded for bad vhid\n");
 812         p2(carps_badaddrs, "\t\t%ju discarded because of a bad address list\n");
 813         p(carps_opackets, "\t%ju packet%s sent (IPv4)\n");
 814         p(carps_opackets6, "\t%ju packet%s sent (IPv6)\n");
 815         p2(carps_onomem, "\t\t%ju send failed due to mbuf memory error\n");
 816 #if notyet
 817         p(carps_ostates, "\t\t%s state update%s sent\n");
 818 #endif
 819 #undef p
 820 #undef p2
 821 }
 822
 823 /*
 824  * Dump IP statistics structure.
 825  */
 826 void
 827 ip_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 828 {
 829         struct ipstat ipstat, zerostat;
 830         size_t len = sizeof ipstat;
 831
 832         if (live) {
 833                 if (zflag)
 834                         memset(&zerostat, 0, len);
 835                 if (sysctlbyname("net.inet.ip.stats", &ipstat, &len,
 836                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 837                         warn("sysctl: net.inet.ip.stats");
 838                         return;
 839                 }
 840         } else
 841                 kread(off, &ipstat, len);
 842
 843         printf("%s:\n", name);
 844
 845 #define p(f, m) if (ipstat.f || sflag <= 1) \
 846     printf(m, ipstat.f, plural(ipstat.f))
 847 #define p1a(f, m) if (ipstat.f || sflag <= 1) \
 848     printf(m, ipstat.f)
 849
 850         p(ips_total, "\t%lu total packet%s received\n");
 851         p(ips_badsum, "\t%lu bad header checksum%s\n");
 852         p1a(ips_toosmall, "\t%lu with size smaller than minimum\n");
 853         p1a(ips_tooshort, "\t%lu with data size < data length\n");
 854         p1a(ips_toolong, "\t%lu with ip length > max ip packet size\n");
 855         p1a(ips_badhlen, "\t%lu with header length < data size\n");
 856         p1a(ips_badlen, "\t%lu with data length < header length\n");
 857         p1a(ips_badoptions, "\t%lu with bad options\n");
 858         p1a(ips_badvers, "\t%lu with incorrect version number\n");
 859         p(ips_fragments, "\t%lu fragment%s received\n");
 860         p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n");
 861         p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n");
 862         p(ips_reassembled, "\t%lu packet%s reassembled ok\n");
 863         p(ips_delivered, "\t%lu packet%s for this host\n");
 864         p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n");
 865         p(ips_forward, "\t%lu packet%s forwarded");
 866         p(ips_fastforward, " (%lu packet%s fast forwarded)");
 867         if (ipstat.ips_forward || sflag <= 1)
 868                 putchar('\n');
 869         p(ips_cantforward, "\t%lu packet%s not forwardable\n");
 870         p(ips_notmember,
 871             "\t%lu packet%s received for unknown multicast group\n");
 872         p(ips_redirectsent, "\t%lu redirect%s sent\n");
 873         p(ips_localout, "\t%lu packet%s sent from this host\n");
 874         p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n");
 875         p(ips_odropped,
 876             "\t%lu output packet%s dropped due to no bufs, etc.\n");
 877         p(ips_noroute, "\t%lu output packet%s discarded due to no route\n");
 878         p(ips_fragmented, "\t%lu output datagram%s fragmented\n");
 879         p(ips_ofragments, "\t%lu fragment%s created\n");
 880         p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n");
 881         p(ips_nogif, "\t%lu tunneling packet%s that can't find gif\n");
 882         p(ips_badaddr, "\t%lu datagram%s with bad address in header\n");
 883 #undef p
 884 #undef p1a
 885 }
 886
 887 /*
 888  * Dump ARP statistics structure.
 889  */
 890 void
 891 arp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 892 {
 893         struct arpstat arpstat, zerostat;
 894         size_t len = sizeof(arpstat);
 895
 896         if (live) {
 897                 if (zflag)
 898                         memset(&zerostat, 0, len);
 899                 if (sysctlbyname("net.link.ether.arp.stats", &arpstat, &len,
 900                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 901                         warn("sysctl: net.link.ether.arp.stats");
 902                         return;
 903                 }
 904         } else
 905                 kread(off, &arpstat, len);
 906
 907         printf("%s:\n", name);
 908
 909 #define p(f, m) if (arpstat.f || sflag <= 1) \
 910     printf(m, arpstat.f, plural(arpstat.f))
 911 #define p2(f, m) if (arpstat.f || sflag <= 1) \
 912     printf(m, arpstat.f, pluralies(arpstat.f))
 913
 914         p(txrequests, "\t%lu ARP request%s sent\n");
 915         p2(txreplies, "\t%lu ARP repl%s sent\n");
 916         p(rxrequests, "\t%lu ARP request%s received\n");
 917         p2(rxreplies, "\t%lu ARP repl%s received\n");
 918         p(received, "\t%lu ARP packet%s received\n");
 919         p(dropped, "\t%lu total packet%s dropped due to no ARP entry\n");
 920         p(timeouts, "\t%lu ARP entry%s timed out\n");
 921         p(dupips, "\t%lu Duplicate IP%s seen\n");
 922 #undef p
 923 #undef p2
 924 }
 925
 926
 927
 928 static  const char *icmpnames[ICMP_MAXTYPE + 1] = {
 929         "echo reply",                   /* RFC 792 */
 930         "#1",
 931         "#2",
 932         "destination unreachable",      /* RFC 792 */
 933         "source quench",                /* RFC 792 */
 934         "routing redirect",             /* RFC 792 */
 935         "#6",
 936         "#7",
 937         "echo",                         /* RFC 792 */
 938         "router advertisement",         /* RFC 1256 */
 939         "router solicitation",          /* RFC 1256 */
 940         "time exceeded",                /* RFC 792 */
 941         "parameter problem",            /* RFC 792 */
 942         "time stamp",                   /* RFC 792 */
 943         "time stamp reply",             /* RFC 792 */
 944         "information request",          /* RFC 792 */
 945         "information request reply",    /* RFC 792 */
 946         "address mask request",         /* RFC 950 */
 947         "address mask reply",           /* RFC 950 */
 948         "#19",
 949         "#20",
 950         "#21",
 951         "#22",
 952         "#23",
 953         "#24",
 954         "#25",
 955         "#26",
 956         "#27",
 957         "#28",
 958         "#29",
 959         "icmp traceroute",              /* RFC 1393 */
 960         "datagram conversion error",    /* RFC 1475 */
 961         "mobile host redirect",
 962         "IPv6 where-are-you",
 963         "IPv6 i-am-here",
 964         "mobile registration req",
 965         "mobile registration reply",
 966         "domain name request",          /* RFC 1788 */
 967         "domain name reply",            /* RFC 1788 */
 968         "icmp SKIP",
 969         "icmp photuris",                /* RFC 2521 */
 970 };
 971
 972 /*
 973  * Dump ICMP statistics.
 974  */
 975 void
 976 icmp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
 977 {
 978         struct icmpstat icmpstat, zerostat;
 979         int i, first;
 980         size_t len;
 981
 982         len = sizeof icmpstat;
 983         if (live) {
 984                 if (zflag)
 985                         memset(&zerostat, 0, len);
 986                 if (sysctlbyname("net.inet.icmp.stats", &icmpstat, &len,
 987                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
 988                         warn("sysctl: net.inet.icmp.stats");
 989                         return;
 990                 }
 991         } else
 992                 kread(off, &icmpstat, len);
 993
 994         printf("%s:\n", name);
 995
 996 #define p(f, m) if (icmpstat.f || sflag <= 1) \
 997     printf(m, icmpstat.f, plural(icmpstat.f))
 998 #define p1a(f, m) if (icmpstat.f || sflag <= 1) \
 999     printf(m, icmpstat.f)
1000 #define p2(f, m) if (icmpstat.f || sflag <= 1) \
1001     printf(m, icmpstat.f, plurales(icmpstat.f))
1002
1003         p(icps_error, "\t%lu call%s to icmp_error\n");
1004         p(icps_oldicmp,
1005             "\t%lu error%s not generated in response to an icmp message\n");
1006         for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
1007                 if (icmpstat.icps_outhist[i] != 0) {
1008                         if (first) {
1009                                 printf("\tOutput histogram:\n");
1010                                 first = 0;
1011                         }
1012                         if (icmpnames[i] != NULL)
1013                                 printf("\t\t%s: %lu\n", icmpnames[i],
1014                                         icmpstat.icps_outhist[i]);
1015                         else
1016                                 printf("\t\tunknown ICMP #%d: %lu\n", i,
1017                                         icmpstat.icps_outhist[i]);
1018                 }
1019         p(icps_badcode, "\t%lu message%s with bad code fields\n");
1020         p(icps_tooshort, "\t%lu message%s less than the minimum length\n");
1021         p(icps_checksum, "\t%lu message%s with bad checksum\n");
1022         p(icps_badlen, "\t%lu message%s with bad length\n");
1023         p1a(icps_bmcastecho, "\t%lu multicast echo requests ignored\n");
1024         p1a(icps_bmcasttstamp, "\t%lu multicast timestamp requests ignored\n");
1025         for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
1026                 if (icmpstat.icps_inhist[i] != 0) {
1027                         if (first) {
1028                                 printf("\tInput histogram:\n");
1029                                 first = 0;
1030                         }
1031                         if (icmpnames[i] != NULL)
1032                                 printf("\t\t%s: %lu\n", icmpnames[i],
1033                                     icmpstat.icps_inhist[i]);
1034                         else
1035                                 printf("\t\tunknown ICMP #%d: %lu\n", i,
1036                                     icmpstat.icps_inhist[i]);
1037                 }
1038         p(icps_reflect, "\t%lu message response%s generated\n");
1039         p2(icps_badaddr, "\t%lu invalid return address%s\n");
1040         p(icps_noroute, "\t%lu no return route%s\n");
1041 #undef p
1042 #undef p1a
1043 #undef p2
1044         if (live) {
1045                 len = sizeof i;
1046                 if (sysctlbyname("net.inet.icmp.maskrepl", &i, &len, NULL, 0) <
1047                     0)
1048                         return;
1049                 printf("\tICMP address mask responses are %sabled\n",
1050                     i ? "en" : "dis");
1051         }
1052 }
1053
1054 #ifndef BURN_BRIDGES
1055 /*
1056  * Dump IGMP statistics structure (pre 8.x kernel).
1057  */
1058 static void
1059 igmp_stats_live_old(u_long off, const char *name)
1060 {
1061         struct oigmpstat oigmpstat, zerostat;
1062         size_t len = sizeof(oigmpstat);
1063
1064         if (zflag)
1065                 memset(&zerostat, 0, len);
1066         if (sysctlbyname("net.inet.igmp.stats", &oigmpstat, &len,
1067             zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
1068                 warn("sysctl: net.inet.igmp.stats");
1069                 return;
1070         }
1071
1072         printf("%s:\n", name);
1073
1074 #define p(f, m) if (oigmpstat.f || sflag <= 1) \
1075     printf(m, oigmpstat.f, plural(oigmpstat.f))
1076 #define py(f, m) if (oigmpstat.f || sflag <= 1) \
1077     printf(m, oigmpstat.f, oigmpstat.f != 1 ? "ies" : "y")
1078         p(igps_rcv_total, "\t%u message%s received\n");
1079         p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n");
1080         p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n");
1081         py(igps_rcv_queries, "\t%u membership quer%s received\n");
1082         py(igps_rcv_badqueries,
1083             "\t%u membership quer%s received with invalid field(s)\n");
1084         p(igps_rcv_reports, "\t%u membership report%s received\n");
1085         p(igps_rcv_badreports,
1086             "\t%u membership report%s received with invalid field(s)\n");
1087         p(igps_rcv_ourreports,
1088 "\t%u membership report%s received for groups to which we belong\n");
1089         p(igps_snd_reports, "\t%u membership report%s sent\n");
1090 #undef p
1091 #undef py
1092 }
1093 #endif /* !BURN_BRIDGES */
1094
1095 /*
1096  * Dump IGMP statistics structure.
1097  */
1098 void
1099 igmp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
1100 {
1101         struct igmpstat igmpstat, zerostat;
1102         size_t len;
1103
1104 #ifndef BURN_BRIDGES
1105         if (live) {
1106                 /*
1107                  * Detect if we are being run against a pre-IGMPv3 kernel.
1108                  * We cannot do this for a core file as the legacy
1109                  * struct igmpstat has no size field, nor does it
1110                  * export it in any readily-available symbols.
1111                  */
1112                 len = 0;
1113                 if (sysctlbyname("net.inet.igmp.stats", NULL, &len, NULL,
1114                     0) < 0) {
1115                         warn("sysctl: net.inet.igmp.stats");
1116                         return;
1117                 }
1118                 if (len < sizeof(igmpstat)) {
1119                         igmp_stats_live_old(off, name);
1120                         return;
1121                 }
1122         }
1123 #endif /* !BURN_BRIDGES */
1124
1125         len = sizeof(igmpstat);
1126         if (live) {
1127                 if (zflag)
1128                         memset(&zerostat, 0, len);
1129                 if (sysctlbyname("net.inet.igmp.stats", &igmpstat, &len,
1130                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
1131                         warn("sysctl: net.inet.igmp.stats");
1132                         return;
1133                 }
1134         } else {
1135                 len = sizeof(igmpstat);
1136                 kread(off, &igmpstat, len);
1137         }
1138
1139         if (igmpstat.igps_version != IGPS_VERSION_3) {
1140                 warnx("%s: version mismatch (%d != %d)", __func__,
1141                     igmpstat.igps_version, IGPS_VERSION_3);
1142         }
1143         if (igmpstat.igps_len != IGPS_VERSION3_LEN) {
1144                 warnx("%s: size mismatch (%d != %d)", __func__,
1145                     igmpstat.igps_len, IGPS_VERSION3_LEN);
1146         }
1147
1148         printf("%s:\n", name);
1149
1150 #define p64(f, m) if (igmpstat.f || sflag <= 1) \
1151     printf(m, (uintmax_t) igmpstat.f, plural(igmpstat.f))
1152 #define py64(f, m) if (igmpstat.f || sflag <= 1) \
1153     printf(m, (uintmax_t) igmpstat.f, pluralies(igmpstat.f))
1154         p64(igps_rcv_total, "\t%ju message%s received\n");
1155         p64(igps_rcv_tooshort, "\t%ju message%s received with too few bytes\n");
1156         p64(igps_rcv_badttl, "\t%ju message%s received with wrong TTL\n");
1157         p64(igps_rcv_badsum, "\t%ju message%s received with bad checksum\n");
1158         py64(igps_rcv_v1v2_queries, "\t%ju V1/V2 membership quer%s received\n");
1159         py64(igps_rcv_v3_queries, "\t%ju V3 membership quer%s received\n");
1160         py64(igps_rcv_badqueries,
1161             "\t%ju membership quer%s received with invalid field(s)\n");
1162         py64(igps_rcv_gen_queries, "\t%ju general quer%s received\n");
1163         py64(igps_rcv_group_queries, "\t%ju group quer%s received\n");
1164         py64(igps_rcv_gsr_queries, "\t%ju group-source quer%s received\n");
1165         py64(igps_drop_gsr_queries, "\t%ju group-source quer%s dropped\n");
1166         p64(igps_rcv_reports, "\t%ju membership report%s received\n");
1167         p64(igps_rcv_badreports,
1168             "\t%ju membership report%s received with invalid field(s)\n");
1169         p64(igps_rcv_ourreports,
1170 "\t%ju membership report%s received for groups to which we belong\n");
1171         p64(igps_rcv_nora, "\t%ju V3 report%s received without Router Alert\n");
1172         p64(igps_snd_reports, "\t%ju membership report%s sent\n");
1173 #undef p64
1174 #undef py64
1175 }
1176
1177 /*
1178  * Dump PIM statistics structure.
1179  */
1180 void
1181 pim_stats(u_long off __unused, const char *name, int af1 __unused,
1182     int proto __unused)
1183 {
1184         struct pimstat pimstat, zerostat;
1185         size_t len = sizeof pimstat;
1186
1187         if (live) {
1188                 if (zflag)
1189                         memset(&zerostat, 0, len);
1190                 if (sysctlbyname("net.inet.pim.stats", &pimstat, &len,
1191                     zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
1192                         if (errno != ENOENT)
1193                                 warn("sysctl: net.inet.pim.stats");
1194                         return;
1195                 }
1196         } else {
1197                 if (off == 0)
1198                         return;
1199                 kread(off, &pimstat, len);
1200         }
1201
1202         printf("%s:\n", name);
1203
1204 #define p(f, m) if (pimstat.f || sflag <= 1) \
1205     printf(m, (uintmax_t)pimstat.f, plural(pimstat.f))
1206 #define py(f, m) if (pimstat.f || sflag <= 1) \
1207     printf(m, (uintmax_t)pimstat.f, pimstat.f != 1 ? "ies" : "y")
1208         p(pims_rcv_total_msgs, "\t%ju message%s received\n");
1209         p(pims_rcv_total_bytes, "\t%ju byte%s received\n");
1210         p(pims_rcv_tooshort, "\t%ju message%s received with too few bytes\n");
1211         p(pims_rcv_badsum, "\t%ju message%s received with bad checksum\n");
1212         p(pims_rcv_badversion, "\t%ju message%s received with bad version\n");
1213         p(pims_rcv_registers_msgs, "\t%ju data register message%s received\n");
1214         p(pims_rcv_registers_bytes, "\t%ju data register byte%s received\n");
1215         p(pims_rcv_registers_wrongiif,
1216             "\t%ju data register message%s received on wrong iif\n");
1217         p(pims_rcv_badregisters, "\t%ju bad register%s received\n");
1218         p(pims_snd_registers_msgs, "\t%ju data register message%s sent\n");
1219         p(pims_snd_registers_bytes, "\t%ju data register byte%s sent\n");
1220 #undef p
1221 #undef py
1222 }
1223
1224 /*
1225  * Pretty print an Internet address (net address + port).
1226  */
1227 void
1228 inetprint(struct in_addr *in, int port, const char *proto, int num_port)
1229 {
1230         struct servent *sp = 0;
1231         char line[80], *cp;
1232         int width;
1233
1234         if (Wflag)
1235             sprintf(line, "%s.", inetname(in));
1236         else
1237             sprintf(line, "%.*s.", (Aflag && !num_port) ? 12 : 16, inetname(in));
1238         cp = index(line, '\0');
1239         if (!num_port && port)
1240                 sp = getservbyport((int)port, proto);
1241         if (sp || port == 0)
1242                 sprintf(cp, "%.15s ", sp ? sp->s_name : "*");
1243         else
1244                 sprintf(cp, "%d ", ntohs((u_short)port));
1245         width = (Aflag && !Wflag) ? 18 : 22;
1246         if (Wflag)
1247             printf("%-*s ", width, line);
1248         else
1249             printf("%-*.*s ", width, width, line);
1250 }
1251
1252 /*
1253  * Construct an Internet address representation.
1254  * If numeric_addr has been supplied, give
1255  * numeric value, otherwise try for symbolic name.
1256  */
1257 char *
1258 inetname(struct in_addr *inp)
1259 {
1260         char *cp;
1261         static char line[MAXHOSTNAMELEN];
1262         struct hostent *hp;
1263         struct netent *np;
1264
1265         cp = 0;
1266         if (!numeric_addr && inp->s_addr != INADDR_ANY) {
1267                 int net = inet_netof(*inp);
1268                 int lna = inet_lnaof(*inp);
1269
1270                 if (lna == INADDR_ANY) {
1271                         np = getnetbyaddr(net, AF_INET);
1272                         if (np)
1273                                 cp = np->n_name;
1274                 }
1275                 if (cp == 0) {
1276                         hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET);
1277                         if (hp) {
1278                                 cp = hp->h_name;
1279                                 trimdomain(cp, strlen(cp));
1280                         }
1281                 }
1282         }
1283         if (inp->s_addr == INADDR_ANY)
1284                 strcpy(line, "*");
1285         else if (cp) {
1286                 strlcpy(line, cp, sizeof(line));
1287         } else {
1288                 inp->s_addr = ntohl(inp->s_addr);
1289 #define C(x)    ((u_int)((x) & 0xff))
1290                 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24),
1291                     C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr));
1292         }
1293         return (line);
1294 }