usr.bin/sockstat/sockstat.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2002 Dag-Erling Coïdan Smørgrav
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer
  12  *    in this position and unchanged.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/socket.h>
  36 #include <sys/socketvar.h>
  37 #include <sys/sysctl.h>
  38 #include <sys/file.h>
  39 #include <sys/user.h>
  40
  41 #include <sys/un.h>
  42 #define _WANT_UNPCB
  43 #include <sys/unpcb.h>
  44
  45 #include <net/route.h>
  46
  47 #include <netinet/in.h>
  48 #include <netinet/in_pcb.h>
  49 #include <netinet/sctp.h>
  50 #include <netinet/tcp.h>
  51 #define TCPSTATES /* load state names */
  52 #include <netinet/tcp_fsm.h>
  53 #include <netinet/tcp_seq.h>
  54 #include <netinet/tcp_var.h>
  55 #include <arpa/inet.h>
  56
  57 #include <ctype.h>
  58 #include <err.h>
  59 #include <errno.h>
  60 #include <netdb.h>
  61 #include <pwd.h>
  62 #include <stdarg.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67
  68 #define sstosin(ss)     ((struct sockaddr_in *)(ss))
  69 #define sstosin6(ss)    ((struct sockaddr_in6 *)(ss))
  70 #define sstosun(ss)     ((struct sockaddr_un *)(ss))
  71 #define sstosa(ss)      ((struct sockaddr *)(ss))
  72
  73 static int       opt_4;         /* Show IPv4 sockets */
  74 static int       opt_6;         /* Show IPv6 sockets */
  75 static int       opt_c;         /* Show connected sockets */
  76 static int       opt_j;         /* Show specified jail */
  77 static int       opt_L;         /* Don't show IPv4 or IPv6 loopback sockets */
  78 static int       opt_l;         /* Show listening sockets */
  79 static int       opt_S;         /* Show protocol stack if applicable */
  80 static int       opt_s;         /* Show protocol state if applicable */
  81 static int       opt_U;         /* Show remote UDP encapsulation port number */
  82 static int       opt_u;         /* Show Unix domain sockets */
  83 static int       opt_v;         /* Verbose mode */
  84 static int       opt_w;         /* Wide print area for addresses */
  85
  86 /*
  87  * Default protocols to use if no -P was defined.
  88  */
  89 static const char *default_protos[] = {"sctp", "tcp", "udp", "divert" };
  90 static size_t      default_numprotos = nitems(default_protos);
  91
  92 static int      *protos;        /* protocols to use */
  93 static size_t    numprotos;     /* allocated size of protos[] */
  94
  95 static int      *ports;
  96
  97 #define INT_BIT (sizeof(int)*CHAR_BIT)
  98 #define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
  99 #define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
 100
 101 struct addr {
 102         struct sockaddr_storage address;
 103         unsigned int encaps_port;
 104         int state;
 105         struct addr *next;
 106 };
 107
 108 struct sock {
 109         void *socket;
 110         void *pcb;
 111         int shown;
 112         int vflag;
 113         int family;
 114         int proto;
 115         int state;
 116         const char *protoname;
 117         char stack[TCP_FUNCTION_NAME_LEN_MAX];
 118         struct addr *laddr;
 119         struct addr *faddr;
 120         struct sock *next;
 121 };
 122
 123 #define HASHSIZE 1009
 124 static struct sock *sockhash[HASHSIZE];
 125
 126 static struct xfile *xfiles;
 127 static int nxfiles;
 128
 129 static int
 130 xprintf(const char *fmt, ...)
 131 {
 132         va_list ap;
 133         int len;
 134
 135         va_start(ap, fmt);
 136         len = vprintf(fmt, ap);
 137         va_end(ap);
 138         if (len < 0)
 139                 err(1, "printf()");
 140         return (len);
 141 }
 142
 143 static int
 144 get_proto_type(const char *proto)
 145 {
 146         struct protoent *pent;
 147
 148         if (strlen(proto) == 0)
 149                 return (0);
 150         pent = getprotobyname(proto);
 151         if (pent == NULL) {
 152                 warn("getprotobyname");
 153                 return (-1);
 154         }
 155         return (pent->p_proto);
 156 }
 157
 158 static void
 159 init_protos(int num)
 160 {
 161         int proto_count = 0;
 162
 163         if (num > 0) {
 164                 proto_count = num;
 165         } else {
 166                 /* Find the maximum number of possible protocols. */
 167                 while (getprotoent() != NULL)
 168                         proto_count++;
 169                 endprotoent();
 170         }
 171
 172         if ((protos = malloc(sizeof(int) * proto_count)) == NULL)
 173                 err(1, "malloc");
 174         numprotos = proto_count;
 175 }
 176
 177 static int
 178 parse_protos(char *protospec)
 179 {
 180         char *prot;
 181         int proto_type, proto_index;
 182
 183         if (protospec == NULL)
 184                 return (-1);
 185
 186         init_protos(0);
 187         proto_index = 0;
 188         while ((prot = strsep(&protospec, ",")) != NULL) {
 189                 if (strlen(prot) == 0)
 190                         continue;
 191                 proto_type = get_proto_type(prot);
 192                 if (proto_type != -1)
 193                         protos[proto_index++] = proto_type;
 194         }
 195         numprotos = proto_index;
 196         return (proto_index);
 197 }
 198
 199 static void
 200 parse_ports(const char *portspec)
 201 {
 202         const char *p, *q;
 203         int port, end;
 204
 205         if (ports == NULL)
 206                 if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
 207                         err(1, "calloc()");
 208         p = portspec;
 209         while (*p != '\0') {
 210                 if (!isdigit(*p))
 211                         errx(1, "syntax error in port range");
 212                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 213                         /* nothing */ ;
 214                 for (port = 0; p < q; ++p)
 215                         port = port * 10 + digittoint(*p);
 216                 if (port < 0 || port > 65535)
 217                         errx(1, "invalid port number");
 218                 SET_PORT(port);
 219                 switch (*p) {
 220                 case '-':
 221                         ++p;
 222                         break;
 223                 case ',':
 224                         ++p;
 225                         /* fall through */
 226                 case '\0':
 227                 default:
 228                         continue;
 229                 }
 230                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 231                         /* nothing */ ;
 232                 for (end = 0; p < q; ++p)
 233                         end = end * 10 + digittoint(*p);
 234                 if (end < port || end > 65535)
 235                         errx(1, "invalid port number");
 236                 while (port++ < end)
 237                         SET_PORT(port);
 238                 if (*p == ',')
 239                         ++p;
 240         }
 241 }
 242
 243 static void
 244 sockaddr(struct sockaddr_storage *ss, int af, void *addr, int port)
 245 {
 246         struct sockaddr_in *sin4;
 247         struct sockaddr_in6 *sin6;
 248
 249         bzero(ss, sizeof(*ss));
 250         switch (af) {
 251         case AF_INET:
 252                 sin4 = sstosin(ss);
 253                 sin4->sin_len = sizeof(*sin4);
 254                 sin4->sin_family = af;
 255                 sin4->sin_port = port;
 256                 sin4->sin_addr = *(struct in_addr *)addr;
 257                 break;
 258         case AF_INET6:
 259                 sin6 = sstosin6(ss);
 260                 sin6->sin6_len = sizeof(*sin6);
 261                 sin6->sin6_family = af;
 262                 sin6->sin6_port = port;
 263                 sin6->sin6_addr = *(struct in6_addr *)addr;
 264 #define s6_addr16       __u6_addr.__u6_addr16
 265                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 266                         sin6->sin6_scope_id =
 267                             ntohs(sin6->sin6_addr.s6_addr16[1]);
 268                         sin6->sin6_addr.s6_addr16[1] = 0;
 269                 }
 270                 break;
 271         default:
 272                 abort();
 273         }
 274 }
 275
 276 static void
 277 free_socket(struct sock *sock)
 278 {
 279         struct addr *cur, *next;
 280
 281         cur = sock->laddr;
 282         while (cur != NULL) {
 283                 next = cur->next;
 284                 free(cur);
 285                 cur = next;
 286         }
 287         cur = sock->faddr;
 288         while (cur != NULL) {
 289                 next = cur->next;
 290                 free(cur);
 291                 cur = next;
 292         }
 293         free(sock);
 294 }
 295
 296 static void
 297 gather_sctp(void)
 298 {
 299         struct sock *sock;
 300         struct addr *laddr, *prev_laddr, *faddr, *prev_faddr;
 301         struct xsctp_inpcb *xinpcb;
 302         struct xsctp_tcb *xstcb;
 303         struct xsctp_raddr *xraddr;
 304         struct xsctp_laddr *xladdr;
 305         const char *varname;
 306         size_t len, offset;
 307         char *buf;
 308         int hash, vflag;
 309         int no_stcb, local_all_loopback, foreign_all_loopback;
 310
 311         vflag = 0;
 312         if (opt_4)
 313                 vflag |= INP_IPV4;
 314         if (opt_6)
 315                 vflag |= INP_IPV6;
 316
 317         varname = "net.inet.sctp.assoclist";
 318         if (sysctlbyname(varname, 0, &len, 0, 0) < 0) {
 319                 if (errno != ENOENT)
 320                         err(1, "sysctlbyname()");
 321                 return;
 322         }
 323         if ((buf = (char *)malloc(len)) == NULL) {
 324                 err(1, "malloc()");
 325                 return;
 326         }
 327         if (sysctlbyname(varname, buf, &len, 0, 0) < 0) {
 328                 err(1, "sysctlbyname()");
 329                 free(buf);
 330                 return;
 331         }
 332         xinpcb = (struct xsctp_inpcb *)(void *)buf;
 333         offset = sizeof(struct xsctp_inpcb);
 334         while ((offset < len) && (xinpcb->last == 0)) {
 335                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 336                         err(1, "malloc()");
 337                 sock->socket = xinpcb->socket;
 338                 sock->proto = IPPROTO_SCTP;
 339                 sock->protoname = "sctp";
 340                 if (xinpcb->maxqlen == 0)
 341                         sock->state = SCTP_CLOSED;
 342                 else
 343                         sock->state = SCTP_LISTEN;
 344                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 345                         sock->family = AF_INET6;
 346                         /*
 347                          * Currently there is no way to distinguish between
 348                          * IPv6 only sockets or dual family sockets.
 349                          * So mark it as dual socket.
 350                          */
 351                         sock->vflag = INP_IPV6 | INP_IPV4;
 352                 } else {
 353                         sock->family = AF_INET;
 354                         sock->vflag = INP_IPV4;
 355                 }
 356                 prev_laddr = NULL;
 357                 local_all_loopback = 1;
 358                 while (offset < len) {
 359                         xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
 360                         offset += sizeof(struct xsctp_laddr);
 361                         if (xladdr->last == 1)
 362                                 break;
 363                         if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
 364                                 err(1, "malloc()");
 365                         switch (xladdr->address.sa.sa_family) {
 366                         case AF_INET:
 367 #define __IN_IS_ADDR_LOOPBACK(pina) \
 368         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 369                                 if (!__IN_IS_ADDR_LOOPBACK(
 370                                     &xladdr->address.sin.sin_addr))
 371                                         local_all_loopback = 0;
 372 #undef  __IN_IS_ADDR_LOOPBACK
 373                                 sockaddr(&laddr->address, AF_INET,
 374                                     &xladdr->address.sin.sin_addr,
 375                                     htons(xinpcb->local_port));
 376                                 break;
 377                         case AF_INET6:
 378                                 if (!IN6_IS_ADDR_LOOPBACK(
 379                                     &xladdr->address.sin6.sin6_addr))
 380                                         local_all_loopback = 0;
 381                                 sockaddr(&laddr->address, AF_INET6,
 382                                     &xladdr->address.sin6.sin6_addr,
 383                                     htons(xinpcb->local_port));
 384                                 break;
 385                         default:
 386                                 errx(1, "address family %d not supported",
 387                                     xladdr->address.sa.sa_family);
 388                         }
 389                         laddr->next = NULL;
 390                         if (prev_laddr == NULL)
 391                                 sock->laddr = laddr;
 392                         else
 393                                 prev_laddr->next = laddr;
 394                         prev_laddr = laddr;
 395                 }
 396                 if (sock->laddr == NULL) {
 397                         if ((sock->laddr =
 398                             calloc(1, sizeof(struct addr))) == NULL)
 399                                 err(1, "malloc()");
 400                         sock->laddr->address.ss_family = sock->family;
 401                         if (sock->family == AF_INET)
 402                                 sock->laddr->address.ss_len =
 403                                     sizeof(struct sockaddr_in);
 404                         else
 405                                 sock->laddr->address.ss_len =
 406                                     sizeof(struct sockaddr_in6);
 407                         local_all_loopback = 0;
 408                 }
 409                 if ((sock->faddr = calloc(1, sizeof(struct addr))) == NULL)
 410                         err(1, "malloc()");
 411                 sock->faddr->address.ss_family = sock->family;
 412                 if (sock->family == AF_INET)
 413                         sock->faddr->address.ss_len =
 414                             sizeof(struct sockaddr_in);
 415                 else
 416                         sock->faddr->address.ss_len =
 417                             sizeof(struct sockaddr_in6);
 418                 no_stcb = 1;
 419                 while (offset < len) {
 420                         xstcb = (struct xsctp_tcb *)(void *)(buf + offset);
 421                         offset += sizeof(struct xsctp_tcb);
 422                         if (no_stcb) {
 423                                 if (opt_l && (sock->vflag & vflag) &&
 424                                     (!opt_L || !local_all_loopback) &&
 425                                     ((xinpcb->flags & SCTP_PCB_FLAGS_UDPTYPE) ||
 426                                      (xstcb->last == 1))) {
 427                                         hash = (int)((uintptr_t)sock->socket %
 428                                             HASHSIZE);
 429                                         sock->next = sockhash[hash];
 430                                         sockhash[hash] = sock;
 431                                 } else {
 432                                         free_socket(sock);
 433                                 }
 434                         }
 435                         if (xstcb->last == 1)
 436                                 break;
 437                         no_stcb = 0;
 438                         if (opt_c) {
 439                                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 440                                         err(1, "malloc()");
 441                                 sock->socket = xinpcb->socket;
 442                                 sock->proto = IPPROTO_SCTP;
 443                                 sock->protoname = "sctp";
 444                                 sock->state = (int)xstcb->state;
 445                                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 446                                         sock->family = AF_INET6;
 447                                 /*
 448                                  * Currently there is no way to distinguish
 449                                  * between IPv6 only sockets or dual family
 450                                  *  sockets. So mark it as dual socket.
 451                                  */
 452                                         sock->vflag = INP_IPV6 | INP_IPV4;
 453                                 } else {
 454                                         sock->family = AF_INET;
 455                                         sock->vflag = INP_IPV4;
 456                                 }
 457                         }
 458                         prev_laddr = NULL;
 459                         local_all_loopback = 1;
 460                         while (offset < len) {
 461                                 xladdr = (struct xsctp_laddr *)(void *)(buf +
 462                                     offset);
 463                                 offset += sizeof(struct xsctp_laddr);
 464                                 if (xladdr->last == 1)
 465                                         break;
 466                                 if (!opt_c)
 467                                         continue;
 468                                 laddr = calloc(1, sizeof(struct addr));
 469                                 if (laddr == NULL)
 470                                         err(1, "malloc()");
 471                                 switch (xladdr->address.sa.sa_family) {
 472                                 case AF_INET:
 473 #define __IN_IS_ADDR_LOOPBACK(pina) \
 474         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 475                                         if (!__IN_IS_ADDR_LOOPBACK(
 476                                             &xladdr->address.sin.sin_addr))
 477                                                 local_all_loopback = 0;
 478 #undef  __IN_IS_ADDR_LOOPBACK
 479                                         sockaddr(&laddr->address, AF_INET,
 480                                             &xladdr->address.sin.sin_addr,
 481                                             htons(xstcb->local_port));
 482                                         break;
 483                                 case AF_INET6:
 484                                         if (!IN6_IS_ADDR_LOOPBACK(
 485                                             &xladdr->address.sin6.sin6_addr))
 486                                                 local_all_loopback = 0;
 487                                         sockaddr(&laddr->address, AF_INET6,
 488                                             &xladdr->address.sin6.sin6_addr,
 489                                             htons(xstcb->local_port));
 490                                         break;
 491                                 default:
 492                                         errx(1,
 493                                             "address family %d not supported",
 494                                             xladdr->address.sa.sa_family);
 495                                 }
 496                                 laddr->next = NULL;
 497                                 if (prev_laddr == NULL)
 498                                         sock->laddr = laddr;
 499                                 else
 500                                         prev_laddr->next = laddr;
 501                                 prev_laddr = laddr;
 502                         }
 503                         prev_faddr = NULL;
 504                         foreign_all_loopback = 1;
 505                         while (offset < len) {
 506                                 xraddr = (struct xsctp_raddr *)(void *)(buf +
 507                                     offset);
 508                                 offset += sizeof(struct xsctp_raddr);
 509                                 if (xraddr->last == 1)
 510                                         break;
 511                                 if (!opt_c)
 512                                         continue;
 513                                 faddr = calloc(1, sizeof(struct addr));
 514                                 if (faddr == NULL)
 515                                         err(1, "malloc()");
 516                                 switch (xraddr->address.sa.sa_family) {
 517                                 case AF_INET:
 518 #define __IN_IS_ADDR_LOOPBACK(pina) \
 519         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 520                                         if (!__IN_IS_ADDR_LOOPBACK(
 521                                             &xraddr->address.sin.sin_addr))
 522                                                 foreign_all_loopback = 0;
 523 #undef  __IN_IS_ADDR_LOOPBACK
 524                                         sockaddr(&faddr->address, AF_INET,
 525                                             &xraddr->address.sin.sin_addr,
 526                                             htons(xstcb->remote_port));
 527                                         break;
 528                                 case AF_INET6:
 529                                         if (!IN6_IS_ADDR_LOOPBACK(
 530                                             &xraddr->address.sin6.sin6_addr))
 531                                                 foreign_all_loopback = 0;
 532                                         sockaddr(&faddr->address, AF_INET6,
 533                                             &xraddr->address.sin6.sin6_addr,
 534                                             htons(xstcb->remote_port));
 535                                         break;
 536                                 default:
 537                                         errx(1,
 538                                             "address family %d not supported",
 539                                             xraddr->address.sa.sa_family);
 540                                 }
 541                                 faddr->encaps_port = xraddr->encaps_port;
 542                                 faddr->state = xraddr->state;
 543                                 faddr->next = NULL;
 544                                 if (prev_faddr == NULL)
 545                                         sock->faddr = faddr;
 546                                 else
 547                                         prev_faddr->next = faddr;
 548                                 prev_faddr = faddr;
 549                         }
 550                         if (opt_c) {
 551                                 if ((sock->vflag & vflag) &&
 552                                     (!opt_L ||
 553                                      !(local_all_loopback ||
 554                                      foreign_all_loopback))) {
 555                                         hash = (int)((uintptr_t)sock->socket %
 556                                             HASHSIZE);
 557                                         sock->next = sockhash[hash];
 558                                         sockhash[hash] = sock;
 559                                 } else {
 560                                         free_socket(sock);
 561                                 }
 562                         }
 563                 }
 564                 xinpcb = (struct xsctp_inpcb *)(void *)(buf + offset);
 565                 offset += sizeof(struct xsctp_inpcb);
 566         }
 567         free(buf);
 568 }
 569
 570 static void
 571 gather_inet(int proto)
 572 {
 573         struct xinpgen *xig, *exig;
 574         struct xinpcb *xip;
 575         struct xtcpcb *xtp = NULL;
 576         struct xsocket *so;
 577         struct sock *sock;
 578         struct addr *laddr, *faddr;
 579         const char *varname, *protoname;
 580         size_t len, bufsize;
 581         void *buf;
 582         int hash, retry, vflag;
 583
 584         vflag = 0;
 585         if (opt_4)
 586                 vflag |= INP_IPV4;
 587         if (opt_6)
 588                 vflag |= INP_IPV6;
 589
 590         switch (proto) {
 591         case IPPROTO_TCP:
 592                 varname = "net.inet.tcp.pcblist";
 593                 protoname = "tcp";
 594                 break;
 595         case IPPROTO_UDP:
 596                 varname = "net.inet.udp.pcblist";
 597                 protoname = "udp";
 598                 break;
 599         case IPPROTO_DIVERT:
 600                 varname = "net.inet.divert.pcblist";
 601                 protoname = "div";
 602                 break;
 603         default:
 604                 errx(1, "protocol %d not supported", proto);
 605         }
 606
 607         buf = NULL;
 608         bufsize = 8192;
 609         retry = 5;
 610         do {
 611                 for (;;) {
 612                         if ((buf = realloc(buf, bufsize)) == NULL)
 613                                 err(1, "realloc()");
 614                         len = bufsize;
 615                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 616                                 break;
 617                         if (errno == ENOENT)
 618                                 goto out;
 619                         if (errno != ENOMEM || len != bufsize)
 620                                 err(1, "sysctlbyname()");
 621                         bufsize *= 2;
 622                 }
 623                 xig = (struct xinpgen *)buf;
 624                 exig = (struct xinpgen *)(void *)
 625                     ((char *)buf + len - sizeof *exig);
 626                 if (xig->xig_len != sizeof *xig ||
 627                     exig->xig_len != sizeof *exig)
 628                         errx(1, "struct xinpgen size mismatch");
 629         } while (xig->xig_gen != exig->xig_gen && retry--);
 630
 631         if (xig->xig_gen != exig->xig_gen && opt_v)
 632                 warnx("warning: data may be inconsistent");
 633
 634         for (;;) {
 635                 xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
 636                 if (xig >= exig)
 637                         break;
 638                 switch (proto) {
 639                 case IPPROTO_TCP:
 640                         xtp = (struct xtcpcb *)xig;
 641                         xip = &xtp->xt_inp;
 642                         if (xtp->xt_len != sizeof(*xtp)) {
 643                                 warnx("struct xtcpcb size mismatch");
 644                                 goto out;
 645                         }
 646                         protoname = xtp->t_flags & TF_TOE ? "toe" : "tcp";
 647                         break;
 648                 case IPPROTO_UDP:
 649                 case IPPROTO_DIVERT:
 650                         xip = (struct xinpcb *)xig;
 651                         if (xip->xi_len != sizeof(*xip)) {
 652                                 warnx("struct xinpcb size mismatch");
 653                                 goto out;
 654                         }
 655                         break;
 656                 default:
 657                         errx(1, "protocol %d not supported", proto);
 658                 }
 659                 so = &xip->xi_socket;
 660                 if ((xip->inp_vflag & vflag) == 0)
 661                         continue;
 662                 if (xip->inp_vflag & INP_IPV4) {
 663                         if ((xip->inp_fport == 0 && !opt_l) ||
 664                             (xip->inp_fport != 0 && !opt_c))
 665                                 continue;
 666 #define __IN_IS_ADDR_LOOPBACK(pina) \
 667         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 668                         if (opt_L &&
 669                             (__IN_IS_ADDR_LOOPBACK(&xip->inp_faddr) ||
 670                              __IN_IS_ADDR_LOOPBACK(&xip->inp_laddr)))
 671                                 continue;
 672 #undef  __IN_IS_ADDR_LOOPBACK
 673                 } else if (xip->inp_vflag & INP_IPV6) {
 674                         if ((xip->inp_fport == 0 && !opt_l) ||
 675                             (xip->inp_fport != 0 && !opt_c))
 676                                 continue;
 677                         if (opt_L &&
 678                             (IN6_IS_ADDR_LOOPBACK(&xip->in6p_faddr) ||
 679                              IN6_IS_ADDR_LOOPBACK(&xip->in6p_laddr)))
 680                                 continue;
 681                 } else {
 682                         if (opt_v)
 683                                 warnx("invalid vflag 0x%x", xip->inp_vflag);
 684                         continue;
 685                 }
 686                 if ((sock = calloc(1, sizeof(*sock))) == NULL)
 687                         err(1, "malloc()");
 688                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 689                         err(1, "malloc()");
 690                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 691                         err(1, "malloc()");
 692                 sock->socket = so->xso_so;
 693                 sock->proto = proto;
 694                 if (xip->inp_vflag & INP_IPV4) {
 695                         sock->family = AF_INET;
 696                         sockaddr(&laddr->address, sock->family,
 697                             &xip->inp_laddr, xip->inp_lport);
 698                         sockaddr(&faddr->address, sock->family,
 699                             &xip->inp_faddr, xip->inp_fport);
 700                 } else if (xip->inp_vflag & INP_IPV6) {
 701                         sock->family = AF_INET6;
 702                         sockaddr(&laddr->address, sock->family,
 703                             &xip->in6p_laddr, xip->inp_lport);
 704                         sockaddr(&faddr->address, sock->family,
 705                             &xip->in6p_faddr, xip->inp_fport);
 706                 }
 707                 laddr->next = NULL;
 708                 faddr->next = NULL;
 709                 sock->laddr = laddr;
 710                 sock->faddr = faddr;
 711                 sock->vflag = xip->inp_vflag;
 712                 if (proto == IPPROTO_TCP) {
 713                         sock->state = xtp->t_state;
 714                         memcpy(sock->stack, xtp->xt_stack,
 715                             TCP_FUNCTION_NAME_LEN_MAX);
 716                 }
 717                 sock->protoname = protoname;
 718                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 719                 sock->next = sockhash[hash];
 720                 sockhash[hash] = sock;
 721         }
 722 out:
 723         free(buf);
 724 }
 725
 726 static void
 727 gather_unix(int proto)
 728 {
 729         struct xunpgen *xug, *exug;
 730         struct xunpcb *xup;
 731         struct sock *sock;
 732         struct addr *laddr, *faddr;
 733         const char *varname, *protoname;
 734         size_t len, bufsize;
 735         void *buf;
 736         int hash, retry;
 737
 738         switch (proto) {
 739         case SOCK_STREAM:
 740                 varname = "net.local.stream.pcblist";
 741                 protoname = "stream";
 742                 break;
 743         case SOCK_DGRAM:
 744                 varname = "net.local.dgram.pcblist";
 745                 protoname = "dgram";
 746                 break;
 747         case SOCK_SEQPACKET:
 748                 varname = "net.local.seqpacket.pcblist";
 749                 protoname = "seqpac";
 750                 break;
 751         default:
 752                 abort();
 753         }
 754         buf = NULL;
 755         bufsize = 8192;
 756         retry = 5;
 757         do {
 758                 for (;;) {
 759                         if ((buf = realloc(buf, bufsize)) == NULL)
 760                                 err(1, "realloc()");
 761                         len = bufsize;
 762                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 763                                 break;
 764                         if (errno != ENOMEM || len != bufsize)
 765                                 err(1, "sysctlbyname()");
 766                         bufsize *= 2;
 767                 }
 768                 xug = (struct xunpgen *)buf;
 769                 exug = (struct xunpgen *)(void *)
 770                     ((char *)buf + len - sizeof(*exug));
 771                 if (xug->xug_len != sizeof(*xug) ||
 772                     exug->xug_len != sizeof(*exug)) {
 773                         warnx("struct xinpgen size mismatch");
 774                         goto out;
 775                 }
 776         } while (xug->xug_gen != exug->xug_gen && retry--);
 777
 778         if (xug->xug_gen != exug->xug_gen && opt_v)
 779                 warnx("warning: data may be inconsistent");
 780
 781         for (;;) {
 782                 xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
 783                 if (xug >= exug)
 784                         break;
 785                 xup = (struct xunpcb *)xug;
 786                 if (xup->xu_len != sizeof(*xup)) {
 787                         warnx("struct xunpcb size mismatch");
 788                         goto out;
 789                 }
 790                 if ((xup->unp_conn == NULL && !opt_l) ||
 791                     (xup->unp_conn != NULL && !opt_c))
 792                         continue;
 793                 if ((sock = calloc(1, sizeof(*sock))) == NULL)
 794                         err(1, "malloc()");
 795                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 796                         err(1, "malloc()");
 797                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 798                         err(1, "malloc()");
 799                 sock->socket = xup->xu_socket.xso_so;
 800                 sock->pcb = xup->xu_unpp;
 801                 sock->proto = proto;
 802                 sock->family = AF_UNIX;
 803                 sock->protoname = protoname;
 804                 if (xup->xu_addr.sun_family == AF_UNIX)
 805                         laddr->address =
 806                             *(struct sockaddr_storage *)(void *)&xup->xu_addr;
 807                 else if (xup->unp_conn != NULL)
 808                         *(void **)&(faddr->address) = xup->unp_conn;
 809                 laddr->next = NULL;
 810                 faddr->next = NULL;
 811                 sock->laddr = laddr;
 812                 sock->faddr = faddr;
 813                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 814                 sock->next = sockhash[hash];
 815                 sockhash[hash] = sock;
 816         }
 817 out:
 818         free(buf);
 819 }
 820
 821 static void
 822 getfiles(void)
 823 {
 824         size_t len, olen;
 825
 826         olen = len = sizeof(*xfiles);
 827         if ((xfiles = malloc(len)) == NULL)
 828                 err(1, "malloc()");
 829         while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
 830                 if (errno != ENOMEM || len != olen)
 831                         err(1, "sysctlbyname()");
 832                 olen = len *= 2;
 833                 if ((xfiles = realloc(xfiles, len)) == NULL)
 834                         err(1, "realloc()");
 835         }
 836         if (len > 0 && xfiles->xf_size != sizeof(*xfiles))
 837                 errx(1, "struct xfile size mismatch");
 838         nxfiles = len / sizeof(*xfiles);
 839 }
 840
 841 static int
 842 printaddr(struct sockaddr_storage *ss)
 843 {
 844         struct sockaddr_un *sun;
 845         char addrstr[NI_MAXHOST] = { '\0', '\0' };
 846         int error, off, port = 0;
 847
 848         switch (ss->ss_family) {
 849         case AF_INET:
 850                 if (inet_lnaof(sstosin(ss)->sin_addr) == INADDR_ANY)
 851                         addrstr[0] = '*';
 852                 port = ntohs(sstosin(ss)->sin_port);
 853                 break;
 854         case AF_INET6:
 855                 if (IN6_IS_ADDR_UNSPECIFIED(&sstosin6(ss)->sin6_addr))
 856                         addrstr[0] = '*';
 857                 port = ntohs(sstosin6(ss)->sin6_port);
 858                 break;
 859         case AF_UNIX:
 860                 sun = sstosun(ss);
 861                 off = (int)((char *)&sun->sun_path - (char *)sun);
 862                 return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
 863         }
 864         if (addrstr[0] == '\0') {
 865                 error = getnameinfo(sstosa(ss), ss->ss_len, addrstr,
 866                     sizeof(addrstr), NULL, 0, NI_NUMERICHOST);
 867                 if (error)
 868                         errx(1, "getnameinfo()");
 869         }
 870         if (port == 0)
 871                 return xprintf("%s:*", addrstr);
 872         else
 873                 return xprintf("%s:%d", addrstr, port);
 874 }
 875
 876 static const char *
 877 getprocname(pid_t pid)
 878 {
 879         static struct kinfo_proc proc;
 880         size_t len;
 881         int mib[4];
 882
 883         mib[0] = CTL_KERN;
 884         mib[1] = KERN_PROC;
 885         mib[2] = KERN_PROC_PID;
 886         mib[3] = (int)pid;
 887         len = sizeof(proc);
 888         if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
 889                 /* Do not warn if the process exits before we get its name. */
 890                 if (errno != ESRCH)
 891                         warn("sysctl()");
 892                 return ("??");
 893         }
 894         return (proc.ki_comm);
 895 }
 896
 897 static int
 898 getprocjid(pid_t pid)
 899 {
 900         static struct kinfo_proc proc;
 901         size_t len;
 902         int mib[4];
 903
 904         mib[0] = CTL_KERN;
 905         mib[1] = KERN_PROC;
 906         mib[2] = KERN_PROC_PID;
 907         mib[3] = (int)pid;
 908         len = sizeof(proc);
 909         if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
 910                 /* Do not warn if the process exits before we get its jid. */
 911                 if (errno != ESRCH)
 912                         warn("sysctl()");
 913                 return (-1);
 914         }
 915         return (proc.ki_jid);
 916 }
 917
 918 static int
 919 check_ports(struct sock *s)
 920 {
 921         int port;
 922         struct addr *addr;
 923
 924         if (ports == NULL)
 925                 return (1);
 926         if ((s->family != AF_INET) && (s->family != AF_INET6))
 927                 return (1);
 928         for (addr = s->laddr; addr != NULL; addr = addr->next) {
 929                 if (s->family == AF_INET)
 930                         port = ntohs(sstosin(&addr->address)->sin_port);
 931                 else
 932                         port = ntohs(sstosin6(&addr->address)->sin6_port);
 933                 if (CHK_PORT(port))
 934                         return (1);
 935         }
 936         for (addr = s->faddr; addr != NULL; addr = addr->next) {
 937                 if (s->family == AF_INET)
 938                         port = ntohs(sstosin(&addr->address)->sin_port);
 939                 else
 940                         port = ntohs(sstosin6(&addr->address)->sin6_port);
 941                 if (CHK_PORT(port))
 942                         return (1);
 943         }
 944         return (0);
 945 }
 946
 947 static const char *
 948 sctp_conn_state(int state)
 949 {
 950         switch (state) {
 951         case SCTP_CLOSED:
 952                 return "CLOSED";
 953                 break;
 954         case SCTP_BOUND:
 955                 return "BOUND";
 956                 break;
 957         case SCTP_LISTEN:
 958                 return "LISTEN";
 959                 break;
 960         case SCTP_COOKIE_WAIT:
 961                 return "COOKIE_WAIT";
 962                 break;
 963         case SCTP_COOKIE_ECHOED:
 964                 return "COOKIE_ECHOED";
 965                 break;
 966         case SCTP_ESTABLISHED:
 967                 return "ESTABLISHED";
 968                 break;
 969         case SCTP_SHUTDOWN_SENT:
 970                 return "SHUTDOWN_SENT";
 971                 break;
 972         case SCTP_SHUTDOWN_RECEIVED:
 973                 return "SHUTDOWN_RECEIVED";
 974                 break;
 975         case SCTP_SHUTDOWN_ACK_SENT:
 976                 return "SHUTDOWN_ACK_SENT";
 977                 break;
 978         case SCTP_SHUTDOWN_PENDING:
 979                 return "SHUTDOWN_PENDING";
 980                 break;
 981         default:
 982                 return "UNKNOWN";
 983                 break;
 984         }
 985 }
 986
 987 static const char *
 988 sctp_path_state(int state)
 989 {
 990         switch (state) {
 991         case SCTP_UNCONFIRMED:
 992                 return "UNCONFIRMED";
 993                 break;
 994         case SCTP_ACTIVE:
 995                 return "ACTIVE";
 996                 break;
 997         case SCTP_INACTIVE:
 998                 return "INACTIVE";
 999                 break;
1000         default:
1001                 return "UNKNOWN";
1002                 break;
1003         }
1004 }
1005
1006 static void
1007 displaysock(struct sock *s, int pos)
1008 {
1009         void *p;
1010         int hash, first, offset;
1011         struct addr *laddr, *faddr;
1012         struct sock *s_tmp;
1013
1014         while (pos < 29)
1015                 pos += xprintf(" ");
1016         pos += xprintf("%s", s->protoname);
1017         if (s->vflag & INP_IPV4)
1018                 pos += xprintf("4");
1019         if (s->vflag & INP_IPV6)
1020                 pos += xprintf("6");
1021         if (s->vflag & (INP_IPV4 | INP_IPV6))
1022                 pos += xprintf(" ");
1023         laddr = s->laddr;
1024         faddr = s->faddr;
1025         first = 1;
1026         while (laddr != NULL || faddr != NULL) {
1027                 offset = 36;
1028                 while (pos < offset)
1029                         pos += xprintf(" ");
1030                 switch (s->family) {
1031                 case AF_INET:
1032                 case AF_INET6:
1033                         if (laddr != NULL) {
1034                                 pos += printaddr(&laddr->address);
1035                                 if (s->family == AF_INET6 && pos >= 58)
1036                                         pos += xprintf(" ");
1037                         }
1038                         offset += opt_w ? 46 : 22;
1039                         while (pos < offset)
1040                                 pos += xprintf(" ");
1041                         if (faddr != NULL)
1042                                 pos += printaddr(&faddr->address);
1043                         offset += opt_w ? 46 : 22;
1044                         break;
1045                 case AF_UNIX:
1046                         if ((laddr == NULL) || (faddr == NULL))
1047                                 errx(1, "laddr = %p or faddr = %p is NULL",
1048                                     (void *)laddr, (void *)faddr);
1049                         /* server */
1050                         if (laddr->address.ss_len > 0) {
1051                                 pos += printaddr(&laddr->address);
1052                                 break;
1053                         }
1054                         /* client */
1055                         p = *(void **)&(faddr->address);
1056                         if (p == NULL) {
1057                                 pos += xprintf("(not connected)");
1058                                 offset += opt_w ? 92 : 44;
1059                                 break;
1060                         }
1061                         pos += xprintf("-> ");
1062                         for (hash = 0; hash < HASHSIZE; ++hash) {
1063                                 for (s_tmp = sockhash[hash];
1064                                     s_tmp != NULL;
1065                                     s_tmp = s_tmp->next)
1066                                         if (s_tmp->pcb == p)
1067                                                 break;
1068                                 if (s_tmp != NULL)
1069                                         break;
1070                         }
1071                         if (s_tmp == NULL || s_tmp->laddr == NULL ||
1072                             s_tmp->laddr->address.ss_len == 0)
1073                                 pos += xprintf("??");
1074                         else
1075                                 pos += printaddr(&s_tmp->laddr->address);
1076                         offset += opt_w ? 92 : 44;
1077                         break;
1078                 default:
1079                         abort();
1080                 }
1081                 if (opt_U) {
1082                         if (faddr != NULL &&
1083                             s->proto == IPPROTO_SCTP &&
1084                             s->state != SCTP_CLOSED &&
1085                             s->state != SCTP_BOUND &&
1086                             s->state != SCTP_LISTEN) {
1087                                 while (pos < offset)
1088                                         pos += xprintf(" ");
1089                                 pos += xprintf("%u",
1090                                     ntohs(faddr->encaps_port));
1091                         }
1092                         offset += 7;
1093                 }
1094                 if (opt_s) {
1095                         if (faddr != NULL &&
1096                             s->proto == IPPROTO_SCTP &&
1097                             s->state != SCTP_CLOSED &&
1098                             s->state != SCTP_BOUND &&
1099                             s->state != SCTP_LISTEN) {
1100                                 while (pos < offset)
1101                                         pos += xprintf(" ");
1102                                 pos += xprintf("%s",
1103                                     sctp_path_state(faddr->state));
1104                         }
1105                         offset += 13;
1106                 }
1107                 if (first) {
1108                         if (opt_s) {
1109                                 if (s->proto == IPPROTO_SCTP ||
1110                                     s->proto == IPPROTO_TCP) {
1111                                         while (pos < offset)
1112                                                 pos += xprintf(" ");
1113                                         switch (s->proto) {
1114                                         case IPPROTO_SCTP:
1115                                                 pos += xprintf("%s",
1116                                                     sctp_conn_state(s->state));
1117                                                 break;
1118                                         case IPPROTO_TCP:
1119                                                 if (s->state >= 0 &&
1120                                                     s->state < TCP_NSTATES)
1121                                                         pos += xprintf("%s",
1122                                                             tcpstates[s->state]);
1123                                                 else
1124                                                         pos += xprintf("?");
1125                                                 break;
1126                                         }
1127                                 }
1128                                 offset += 13;
1129                         }
1130                         if (opt_S && s->proto == IPPROTO_TCP) {
1131                                 while (pos < offset)
1132                                         pos += xprintf(" ");
1133                                 xprintf("%.*s", TCP_FUNCTION_NAME_LEN_MAX,
1134                                     s->stack);
1135                         }
1136                 }
1137                 if (laddr != NULL)
1138                         laddr = laddr->next;
1139                 if (faddr != NULL)
1140                         faddr = faddr->next;
1141                 if ((laddr != NULL) || (faddr != NULL)) {
1142                         xprintf("\n");
1143                         pos = 0;
1144                 }
1145                 first = 0;
1146         }
1147         xprintf("\n");
1148 }
1149
1150 static void
1151 display(void)
1152 {
1153         struct passwd *pwd;
1154         struct xfile *xf;
1155         struct sock *s;
1156         int hash, n, pos;
1157
1158         printf("%-8s %-10s %-5s %-2s %-6s %-*s %-*s",
1159             "USER", "COMMAND", "PID", "FD", "PROTO",
1160             opt_w ? 45 : 21, "LOCAL ADDRESS",
1161             opt_w ? 45 : 21, "FOREIGN ADDRESS");
1162         if (opt_U)
1163                 printf(" %-6s", "ENCAPS");
1164         if (opt_s) {
1165                 printf(" %-12s", "PATH STATE");
1166                 printf(" %-12s", "CONN STATE");
1167         }
1168         if (opt_S)
1169                 printf(" %.*s", TCP_FUNCTION_NAME_LEN_MAX, "STACK");
1170         printf("\n");
1171         setpassent(1);
1172         for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
1173                 if (xf->xf_data == NULL)
1174                         continue;
1175                 if (opt_j >= 0 && opt_j != getprocjid(xf->xf_pid))
1176                         continue;
1177                 hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
1178                 for (s = sockhash[hash]; s != NULL; s = s->next) {
1179                         if ((void *)s->socket != xf->xf_data)
1180                                 continue;
1181                         if (!check_ports(s))
1182                                 continue;
1183                         s->shown = 1;
1184                         pos = 0;
1185                         if ((pwd = getpwuid(xf->xf_uid)) == NULL)
1186                                 pos += xprintf("%lu ", (u_long)xf->xf_uid);
1187                         else
1188                                 pos += xprintf("%s ", pwd->pw_name);
1189                         while (pos < 9)
1190                                 pos += xprintf(" ");
1191                         pos += xprintf("%.10s", getprocname(xf->xf_pid));
1192                         while (pos < 20)
1193                                 pos += xprintf(" ");
1194                         pos += xprintf("%lu ", (u_long)xf->xf_pid);
1195                         while (pos < 26)
1196                                 pos += xprintf(" ");
1197                         pos += xprintf("%d ", xf->xf_fd);
1198                         displaysock(s, pos);
1199                 }
1200         }
1201         if (opt_j >= 0)
1202                 return;
1203         for (hash = 0; hash < HASHSIZE; hash++) {
1204                 for (s = sockhash[hash]; s != NULL; s = s->next) {
1205                         if (s->shown)
1206                                 continue;
1207                         if (!check_ports(s))
1208                                 continue;
1209                         pos = 0;
1210                         pos += xprintf("%-8s %-10s %-5s %-2s ",
1211                             "?", "?", "?", "?");
1212                         displaysock(s, pos);
1213                 }
1214         }
1215 }
1216
1217 static int set_default_protos(void)
1218 {
1219         struct protoent *prot;
1220         const char *pname;
1221         size_t pindex;
1222
1223         init_protos(default_numprotos);
1224
1225         for (pindex = 0; pindex < default_numprotos; pindex++) {
1226                 pname = default_protos[pindex];
1227                 prot = getprotobyname(pname);
1228                 if (prot == NULL)
1229                         err(1, "getprotobyname: %s", pname);
1230                 protos[pindex] = prot->p_proto;
1231         }
1232         numprotos = pindex;
1233         return (pindex);
1234 }
1235
1236 static void
1237 usage(void)
1238 {
1239         fprintf(stderr,
1240             "usage: sockstat [-46cLlSsUuvw] [-j jid] [-p ports] [-P protocols]\n");
1241         exit(1);
1242 }
1243
1244 int
1245 main(int argc, char *argv[])
1246 {
1247         int protos_defined = -1;
1248         int o, i;
1249
1250         opt_j = -1;
1251         while ((o = getopt(argc, argv, "46cj:Llp:P:SsUuvw")) != -1)
1252                 switch (o) {
1253                 case '4':
1254                         opt_4 = 1;
1255                         break;
1256                 case '6':
1257                         opt_6 = 1;
1258                         break;
1259                 case 'c':
1260                         opt_c = 1;
1261                         break;
1262                 case 'j':
1263                         opt_j = atoi(optarg);
1264                         break;
1265                 case 'L':
1266                         opt_L = 1;
1267                         break;
1268                 case 'l':
1269                         opt_l = 1;
1270                         break;
1271                 case 'p':
1272                         parse_ports(optarg);
1273                         break;
1274                 case 'P':
1275                         protos_defined = parse_protos(optarg);
1276                         break;
1277                 case 'S':
1278                         opt_S = 1;
1279                         break;
1280                 case 's':
1281                         opt_s = 1;
1282                         break;
1283                 case 'U':
1284                         opt_U = 1;
1285                         break;
1286                 case 'u':
1287                         opt_u = 1;
1288                         break;
1289                 case 'v':
1290                         ++opt_v;
1291                         break;
1292                 case 'w':
1293                         opt_w = 1;
1294                         break;
1295                 default:
1296                         usage();
1297                 }
1298
1299         argc -= optind;
1300         argv += optind;
1301
1302         if (argc > 0)
1303                 usage();
1304
1305         if ((!opt_4 && !opt_6) && protos_defined != -1)
1306                 opt_4 = opt_6 = 1;
1307         if (!opt_4 && !opt_6 && !opt_u)
1308                 opt_4 = opt_6 = opt_u = 1;
1309         if ((opt_4 || opt_6) && protos_defined == -1)
1310                 protos_defined = set_default_protos();
1311         if (!opt_c && !opt_l)
1312                 opt_c = opt_l = 1;
1313
1314         if (opt_4 || opt_6) {
1315                 for (i = 0; i < protos_defined; i++)
1316                         if (protos[i] == IPPROTO_SCTP)
1317                                 gather_sctp();
1318                         else
1319                                 gather_inet(protos[i]);
1320         }
1321
1322         if (opt_u || (protos_defined == -1 && !opt_4 && !opt_6)) {
1323                 gather_unix(SOCK_STREAM);
1324                 gather_unix(SOCK_DGRAM);
1325                 gather_unix(SOCK_SEQPACKET);
1326         }
1327         getfiles();
1328         display();
1329         exit(0);
1330 }