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_q;         /* Don't show header */
  80 static int       opt_S;         /* Show protocol stack if applicable */
  81 static int       opt_s;         /* Show protocol state if applicable */
  82 static int       opt_U;         /* Show remote UDP encapsulation port number */
  83 static int       opt_u;         /* Show Unix domain sockets */
  84 static int       opt_v;         /* Verbose mode */
  85 static int       opt_w;         /* Wide print area for addresses */
  86
  87 /*
  88  * Default protocols to use if no -P was defined.
  89  */
  90 static const char *default_protos[] = {"sctp", "tcp", "udp", "divert" };
  91 static size_t      default_numprotos = nitems(default_protos);
  92
  93 static int      *protos;        /* protocols to use */
  94 static size_t    numprotos;     /* allocated size of protos[] */
  95
  96 static int      *ports;
  97
  98 #define INT_BIT (sizeof(int)*CHAR_BIT)
  99 #define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
 100 #define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
 101
 102 struct addr {
 103         struct sockaddr_storage address;
 104         unsigned int encaps_port;
 105         int state;
 106         struct addr *next;
 107 };
 108
 109 struct sock {
 110         void *socket;
 111         void *pcb;
 112         int shown;
 113         int vflag;
 114         int family;
 115         int proto;
 116         int state;
 117         const char *protoname;
 118         char stack[TCP_FUNCTION_NAME_LEN_MAX];
 119         struct addr *laddr;
 120         struct addr *faddr;
 121         struct sock *next;
 122 };
 123
 124 #define HASHSIZE 1009
 125 static struct sock *sockhash[HASHSIZE];
 126
 127 static struct xfile *xfiles;
 128 static int nxfiles;
 129
 130 static int
 131 xprintf(const char *fmt, ...)
 132 {
 133         va_list ap;
 134         int len;
 135
 136         va_start(ap, fmt);
 137         len = vprintf(fmt, ap);
 138         va_end(ap);
 139         if (len < 0)
 140                 err(1, "printf()");
 141         return (len);
 142 }
 143
 144 static int
 145 get_proto_type(const char *proto)
 146 {
 147         struct protoent *pent;
 148
 149         if (strlen(proto) == 0)
 150                 return (0);
 151         pent = getprotobyname(proto);
 152         if (pent == NULL) {
 153                 warn("getprotobyname");
 154                 return (-1);
 155         }
 156         return (pent->p_proto);
 157 }
 158
 159 static void
 160 init_protos(int num)
 161 {
 162         int proto_count = 0;
 163
 164         if (num > 0) {
 165                 proto_count = num;
 166         } else {
 167                 /* Find the maximum number of possible protocols. */
 168                 while (getprotoent() != NULL)
 169                         proto_count++;
 170                 endprotoent();
 171         }
 172
 173         if ((protos = malloc(sizeof(int) * proto_count)) == NULL)
 174                 err(1, "malloc");
 175         numprotos = proto_count;
 176 }
 177
 178 static int
 179 parse_protos(char *protospec)
 180 {
 181         char *prot;
 182         int proto_type, proto_index;
 183
 184         if (protospec == NULL)
 185                 return (-1);
 186
 187         init_protos(0);
 188         proto_index = 0;
 189         while ((prot = strsep(&protospec, ",")) != NULL) {
 190                 if (strlen(prot) == 0)
 191                         continue;
 192                 proto_type = get_proto_type(prot);
 193                 if (proto_type != -1)
 194                         protos[proto_index++] = proto_type;
 195         }
 196         numprotos = proto_index;
 197         return (proto_index);
 198 }
 199
 200 static void
 201 parse_ports(const char *portspec)
 202 {
 203         const char *p, *q;
 204         int port, end;
 205
 206         if (ports == NULL)
 207                 if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
 208                         err(1, "calloc()");
 209         p = portspec;
 210         while (*p != '\0') {
 211                 if (!isdigit(*p))
 212                         errx(1, "syntax error in port range");
 213                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 214                         /* nothing */ ;
 215                 for (port = 0; p < q; ++p)
 216                         port = port * 10 + digittoint(*p);
 217                 if (port < 0 || port > 65535)
 218                         errx(1, "invalid port number");
 219                 SET_PORT(port);
 220                 switch (*p) {
 221                 case '-':
 222                         ++p;
 223                         break;
 224                 case ',':
 225                         ++p;
 226                         /* fall through */
 227                 case '\0':
 228                 default:
 229                         continue;
 230                 }
 231                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 232                         /* nothing */ ;
 233                 for (end = 0; p < q; ++p)
 234                         end = end * 10 + digittoint(*p);
 235                 if (end < port || end > 65535)
 236                         errx(1, "invalid port number");
 237                 while (port++ < end)
 238                         SET_PORT(port);
 239                 if (*p == ',')
 240                         ++p;
 241         }
 242 }
 243
 244 static void
 245 sockaddr(struct sockaddr_storage *ss, int af, void *addr, int port)
 246 {
 247         struct sockaddr_in *sin4;
 248         struct sockaddr_in6 *sin6;
 249
 250         bzero(ss, sizeof(*ss));
 251         switch (af) {
 252         case AF_INET:
 253                 sin4 = sstosin(ss);
 254                 sin4->sin_len = sizeof(*sin4);
 255                 sin4->sin_family = af;
 256                 sin4->sin_port = port;
 257                 sin4->sin_addr = *(struct in_addr *)addr;
 258                 break;
 259         case AF_INET6:
 260                 sin6 = sstosin6(ss);
 261                 sin6->sin6_len = sizeof(*sin6);
 262                 sin6->sin6_family = af;
 263                 sin6->sin6_port = port;
 264                 sin6->sin6_addr = *(struct in6_addr *)addr;
 265 #define s6_addr16       __u6_addr.__u6_addr16
 266                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 267                         sin6->sin6_scope_id =
 268                             ntohs(sin6->sin6_addr.s6_addr16[1]);
 269                         sin6->sin6_addr.s6_addr16[1] = 0;
 270                 }
 271                 break;
 272         default:
 273                 abort();
 274         }
 275 }
 276
 277 static void
 278 free_socket(struct sock *sock)
 279 {
 280         struct addr *cur, *next;
 281
 282         cur = sock->laddr;
 283         while (cur != NULL) {
 284                 next = cur->next;
 285                 free(cur);
 286                 cur = next;
 287         }
 288         cur = sock->faddr;
 289         while (cur != NULL) {
 290                 next = cur->next;
 291                 free(cur);
 292                 cur = next;
 293         }
 294         free(sock);
 295 }
 296
 297 static void
 298 gather_sctp(void)
 299 {
 300         struct sock *sock;
 301         struct addr *laddr, *prev_laddr, *faddr, *prev_faddr;
 302         struct xsctp_inpcb *xinpcb;
 303         struct xsctp_tcb *xstcb;
 304         struct xsctp_raddr *xraddr;
 305         struct xsctp_laddr *xladdr;
 306         const char *varname;
 307         size_t len, offset;
 308         char *buf;
 309         int hash, vflag;
 310         int no_stcb, local_all_loopback, foreign_all_loopback;
 311
 312         vflag = 0;
 313         if (opt_4)
 314                 vflag |= INP_IPV4;
 315         if (opt_6)
 316                 vflag |= INP_IPV6;
 317
 318         varname = "net.inet.sctp.assoclist";
 319         if (sysctlbyname(varname, 0, &len, 0, 0) < 0) {
 320                 if (errno != ENOENT)
 321                         err(1, "sysctlbyname()");
 322                 return;
 323         }
 324         if ((buf = (char *)malloc(len)) == NULL) {
 325                 err(1, "malloc()");
 326                 return;
 327         }
 328         if (sysctlbyname(varname, buf, &len, 0, 0) < 0) {
 329                 err(1, "sysctlbyname()");
 330                 free(buf);
 331                 return;
 332         }
 333         xinpcb = (struct xsctp_inpcb *)(void *)buf;
 334         offset = sizeof(struct xsctp_inpcb);
 335         while ((offset < len) && (xinpcb->last == 0)) {
 336                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 337                         err(1, "malloc()");
 338                 sock->socket = xinpcb->socket;
 339                 sock->proto = IPPROTO_SCTP;
 340                 sock->protoname = "sctp";
 341                 if (xinpcb->maxqlen == 0)
 342                         sock->state = SCTP_CLOSED;
 343                 else
 344                         sock->state = SCTP_LISTEN;
 345                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 346                         sock->family = AF_INET6;
 347                         /*
 348                          * Currently there is no way to distinguish between
 349                          * IPv6 only sockets or dual family sockets.
 350                          * So mark it as dual socket.
 351                          */
 352                         sock->vflag = INP_IPV6 | INP_IPV4;
 353                 } else {
 354                         sock->family = AF_INET;
 355                         sock->vflag = INP_IPV4;
 356                 }
 357                 prev_laddr = NULL;
 358                 local_all_loopback = 1;
 359                 while (offset < len) {
 360                         xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
 361                         offset += sizeof(struct xsctp_laddr);
 362                         if (xladdr->last == 1)
 363                                 break;
 364                         if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
 365                                 err(1, "malloc()");
 366                         switch (xladdr->address.sa.sa_family) {
 367                         case AF_INET:
 368 #define __IN_IS_ADDR_LOOPBACK(pina) \
 369         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 370                                 if (!__IN_IS_ADDR_LOOPBACK(
 371                                     &xladdr->address.sin.sin_addr))
 372                                         local_all_loopback = 0;
 373 #undef  __IN_IS_ADDR_LOOPBACK
 374                                 sockaddr(&laddr->address, AF_INET,
 375                                     &xladdr->address.sin.sin_addr,
 376                                     htons(xinpcb->local_port));
 377                                 break;
 378                         case AF_INET6:
 379                                 if (!IN6_IS_ADDR_LOOPBACK(
 380                                     &xladdr->address.sin6.sin6_addr))
 381                                         local_all_loopback = 0;
 382                                 sockaddr(&laddr->address, AF_INET6,
 383                                     &xladdr->address.sin6.sin6_addr,
 384                                     htons(xinpcb->local_port));
 385                                 break;
 386                         default:
 387                                 errx(1, "address family %d not supported",
 388                                     xladdr->address.sa.sa_family);
 389                         }
 390                         laddr->next = NULL;
 391                         if (prev_laddr == NULL)
 392                                 sock->laddr = laddr;
 393                         else
 394                                 prev_laddr->next = laddr;
 395                         prev_laddr = laddr;
 396                 }
 397                 if (sock->laddr == NULL) {
 398                         if ((sock->laddr =
 399                             calloc(1, sizeof(struct addr))) == NULL)
 400                                 err(1, "malloc()");
 401                         sock->laddr->address.ss_family = sock->family;
 402                         if (sock->family == AF_INET)
 403                                 sock->laddr->address.ss_len =
 404                                     sizeof(struct sockaddr_in);
 405                         else
 406                                 sock->laddr->address.ss_len =
 407                                     sizeof(struct sockaddr_in6);
 408                         local_all_loopback = 0;
 409                 }
 410                 if ((sock->faddr = calloc(1, sizeof(struct addr))) == NULL)
 411                         err(1, "malloc()");
 412                 sock->faddr->address.ss_family = sock->family;
 413                 if (sock->family == AF_INET)
 414                         sock->faddr->address.ss_len =
 415                             sizeof(struct sockaddr_in);
 416                 else
 417                         sock->faddr->address.ss_len =
 418                             sizeof(struct sockaddr_in6);
 419                 no_stcb = 1;
 420                 while (offset < len) {
 421                         xstcb = (struct xsctp_tcb *)(void *)(buf + offset);
 422                         offset += sizeof(struct xsctp_tcb);
 423                         if (no_stcb) {
 424                                 if (opt_l && (sock->vflag & vflag) &&
 425                                     (!opt_L || !local_all_loopback) &&
 426                                     ((xinpcb->flags & SCTP_PCB_FLAGS_UDPTYPE) ||
 427                                      (xstcb->last == 1))) {
 428                                         hash = (int)((uintptr_t)sock->socket %
 429                                             HASHSIZE);
 430                                         sock->next = sockhash[hash];
 431                                         sockhash[hash] = sock;
 432                                 } else {
 433                                         free_socket(sock);
 434                                 }
 435                         }
 436                         if (xstcb->last == 1)
 437                                 break;
 438                         no_stcb = 0;
 439                         if (opt_c) {
 440                                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 441                                         err(1, "malloc()");
 442                                 sock->socket = xinpcb->socket;
 443                                 sock->proto = IPPROTO_SCTP;
 444                                 sock->protoname = "sctp";
 445                                 sock->state = (int)xstcb->state;
 446                                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 447                                         sock->family = AF_INET6;
 448                                 /*
 449                                  * Currently there is no way to distinguish
 450                                  * between IPv6 only sockets or dual family
 451                                  *  sockets. So mark it as dual socket.
 452                                  */
 453                                         sock->vflag = INP_IPV6 | INP_IPV4;
 454                                 } else {
 455                                         sock->family = AF_INET;
 456                                         sock->vflag = INP_IPV4;
 457                                 }
 458                         }
 459                         prev_laddr = NULL;
 460                         local_all_loopback = 1;
 461                         while (offset < len) {
 462                                 xladdr = (struct xsctp_laddr *)(void *)(buf +
 463                                     offset);
 464                                 offset += sizeof(struct xsctp_laddr);
 465                                 if (xladdr->last == 1)
 466                                         break;
 467                                 if (!opt_c)
 468                                         continue;
 469                                 laddr = calloc(1, sizeof(struct addr));
 470                                 if (laddr == NULL)
 471                                         err(1, "malloc()");
 472                                 switch (xladdr->address.sa.sa_family) {
 473                                 case AF_INET:
 474 #define __IN_IS_ADDR_LOOPBACK(pina) \
 475         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 476                                         if (!__IN_IS_ADDR_LOOPBACK(
 477                                             &xladdr->address.sin.sin_addr))
 478                                                 local_all_loopback = 0;
 479 #undef  __IN_IS_ADDR_LOOPBACK
 480                                         sockaddr(&laddr->address, AF_INET,
 481                                             &xladdr->address.sin.sin_addr,
 482                                             htons(xstcb->local_port));
 483                                         break;
 484                                 case AF_INET6:
 485                                         if (!IN6_IS_ADDR_LOOPBACK(
 486                                             &xladdr->address.sin6.sin6_addr))
 487                                                 local_all_loopback = 0;
 488                                         sockaddr(&laddr->address, AF_INET6,
 489                                             &xladdr->address.sin6.sin6_addr,
 490                                             htons(xstcb->local_port));
 491                                         break;
 492                                 default:
 493                                         errx(1,
 494                                             "address family %d not supported",
 495                                             xladdr->address.sa.sa_family);
 496                                 }
 497                                 laddr->next = NULL;
 498                                 if (prev_laddr == NULL)
 499                                         sock->laddr = laddr;
 500                                 else
 501                                         prev_laddr->next = laddr;
 502                                 prev_laddr = laddr;
 503                         }
 504                         prev_faddr = NULL;
 505                         foreign_all_loopback = 1;
 506                         while (offset < len) {
 507                                 xraddr = (struct xsctp_raddr *)(void *)(buf +
 508                                     offset);
 509                                 offset += sizeof(struct xsctp_raddr);
 510                                 if (xraddr->last == 1)
 511                                         break;
 512                                 if (!opt_c)
 513                                         continue;
 514                                 faddr = calloc(1, sizeof(struct addr));
 515                                 if (faddr == NULL)
 516                                         err(1, "malloc()");
 517                                 switch (xraddr->address.sa.sa_family) {
 518                                 case AF_INET:
 519 #define __IN_IS_ADDR_LOOPBACK(pina) \
 520         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 521                                         if (!__IN_IS_ADDR_LOOPBACK(
 522                                             &xraddr->address.sin.sin_addr))
 523                                                 foreign_all_loopback = 0;
 524 #undef  __IN_IS_ADDR_LOOPBACK
 525                                         sockaddr(&faddr->address, AF_INET,
 526                                             &xraddr->address.sin.sin_addr,
 527                                             htons(xstcb->remote_port));
 528                                         break;
 529                                 case AF_INET6:
 530                                         if (!IN6_IS_ADDR_LOOPBACK(
 531                                             &xraddr->address.sin6.sin6_addr))
 532                                                 foreign_all_loopback = 0;
 533                                         sockaddr(&faddr->address, AF_INET6,
 534                                             &xraddr->address.sin6.sin6_addr,
 535                                             htons(xstcb->remote_port));
 536                                         break;
 537                                 default:
 538                                         errx(1,
 539                                             "address family %d not supported",
 540                                             xraddr->address.sa.sa_family);
 541                                 }
 542                                 faddr->encaps_port = xraddr->encaps_port;
 543                                 faddr->state = xraddr->state;
 544                                 faddr->next = NULL;
 545                                 if (prev_faddr == NULL)
 546                                         sock->faddr = faddr;
 547                                 else
 548                                         prev_faddr->next = faddr;
 549                                 prev_faddr = faddr;
 550                         }
 551                         if (opt_c) {
 552                                 if ((sock->vflag & vflag) &&
 553                                     (!opt_L ||
 554                                      !(local_all_loopback ||
 555                                      foreign_all_loopback))) {
 556                                         hash = (int)((uintptr_t)sock->socket %
 557                                             HASHSIZE);
 558                                         sock->next = sockhash[hash];
 559                                         sockhash[hash] = sock;
 560                                 } else {
 561                                         free_socket(sock);
 562                                 }
 563                         }
 564                 }
 565                 xinpcb = (struct xsctp_inpcb *)(void *)(buf + offset);
 566                 offset += sizeof(struct xsctp_inpcb);
 567         }
 568         free(buf);
 569 }
 570
 571 static void
 572 gather_inet(int proto)
 573 {
 574         struct xinpgen *xig, *exig;
 575         struct xinpcb *xip;
 576         struct xtcpcb *xtp = NULL;
 577         struct xsocket *so;
 578         struct sock *sock;
 579         struct addr *laddr, *faddr;
 580         const char *varname, *protoname;
 581         size_t len, bufsize;
 582         void *buf;
 583         int hash, retry, vflag;
 584
 585         vflag = 0;
 586         if (opt_4)
 587                 vflag |= INP_IPV4;
 588         if (opt_6)
 589                 vflag |= INP_IPV6;
 590
 591         switch (proto) {
 592         case IPPROTO_TCP:
 593                 varname = "net.inet.tcp.pcblist";
 594                 protoname = "tcp";
 595                 break;
 596         case IPPROTO_UDP:
 597                 varname = "net.inet.udp.pcblist";
 598                 protoname = "udp";
 599                 break;
 600         case IPPROTO_DIVERT:
 601                 varname = "net.inet.divert.pcblist";
 602                 protoname = "div";
 603                 break;
 604         default:
 605                 errx(1, "protocol %d not supported", proto);
 606         }
 607
 608         buf = NULL;
 609         bufsize = 8192;
 610         retry = 5;
 611         do {
 612                 for (;;) {
 613                         if ((buf = realloc(buf, bufsize)) == NULL)
 614                                 err(1, "realloc()");
 615                         len = bufsize;
 616                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 617                                 break;
 618                         if (errno == ENOENT)
 619                                 goto out;
 620                         if (errno != ENOMEM || len != bufsize)
 621                                 err(1, "sysctlbyname()");
 622                         bufsize *= 2;
 623                 }
 624                 xig = (struct xinpgen *)buf;
 625                 exig = (struct xinpgen *)(void *)
 626                     ((char *)buf + len - sizeof *exig);
 627                 if (xig->xig_len != sizeof *xig ||
 628                     exig->xig_len != sizeof *exig)
 629                         errx(1, "struct xinpgen size mismatch");
 630         } while (xig->xig_gen != exig->xig_gen && retry--);
 631
 632         if (xig->xig_gen != exig->xig_gen && opt_v)
 633                 warnx("warning: data may be inconsistent");
 634
 635         for (;;) {
 636                 xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
 637                 if (xig >= exig)
 638                         break;
 639                 switch (proto) {
 640                 case IPPROTO_TCP:
 641                         xtp = (struct xtcpcb *)xig;
 642                         xip = &xtp->xt_inp;
 643                         if (xtp->xt_len != sizeof(*xtp)) {
 644                                 warnx("struct xtcpcb size mismatch");
 645                                 goto out;
 646                         }
 647                         protoname = xtp->t_flags & TF_TOE ? "toe" : "tcp";
 648                         break;
 649                 case IPPROTO_UDP:
 650                 case IPPROTO_DIVERT:
 651                         xip = (struct xinpcb *)xig;
 652                         if (xip->xi_len != sizeof(*xip)) {
 653                                 warnx("struct xinpcb size mismatch");
 654                                 goto out;
 655                         }
 656                         break;
 657                 default:
 658                         errx(1, "protocol %d not supported", proto);
 659                 }
 660                 so = &xip->xi_socket;
 661                 if ((xip->inp_vflag & vflag) == 0)
 662                         continue;
 663                 if (xip->inp_vflag & INP_IPV4) {
 664                         if ((xip->inp_fport == 0 && !opt_l) ||
 665                             (xip->inp_fport != 0 && !opt_c))
 666                                 continue;
 667 #define __IN_IS_ADDR_LOOPBACK(pina) \
 668         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 669                         if (opt_L &&
 670                             (__IN_IS_ADDR_LOOPBACK(&xip->inp_faddr) ||
 671                              __IN_IS_ADDR_LOOPBACK(&xip->inp_laddr)))
 672                                 continue;
 673 #undef  __IN_IS_ADDR_LOOPBACK
 674                 } else if (xip->inp_vflag & INP_IPV6) {
 675                         if ((xip->inp_fport == 0 && !opt_l) ||
 676                             (xip->inp_fport != 0 && !opt_c))
 677                                 continue;
 678                         if (opt_L &&
 679                             (IN6_IS_ADDR_LOOPBACK(&xip->in6p_faddr) ||
 680                              IN6_IS_ADDR_LOOPBACK(&xip->in6p_laddr)))
 681                                 continue;
 682                 } else {
 683                         if (opt_v)
 684                                 warnx("invalid vflag 0x%x", xip->inp_vflag);
 685                         continue;
 686                 }
 687                 if ((sock = calloc(1, sizeof(*sock))) == NULL)
 688                         err(1, "malloc()");
 689                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 690                         err(1, "malloc()");
 691                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 692                         err(1, "malloc()");
 693                 sock->socket = so->xso_so;
 694                 sock->proto = proto;
 695                 if (xip->inp_vflag & INP_IPV4) {
 696                         sock->family = AF_INET;
 697                         sockaddr(&laddr->address, sock->family,
 698                             &xip->inp_laddr, xip->inp_lport);
 699                         sockaddr(&faddr->address, sock->family,
 700                             &xip->inp_faddr, xip->inp_fport);
 701                 } else if (xip->inp_vflag & INP_IPV6) {
 702                         sock->family = AF_INET6;
 703                         sockaddr(&laddr->address, sock->family,
 704                             &xip->in6p_laddr, xip->inp_lport);
 705                         sockaddr(&faddr->address, sock->family,
 706                             &xip->in6p_faddr, xip->inp_fport);
 707                 }
 708                 laddr->next = NULL;
 709                 faddr->next = NULL;
 710                 sock->laddr = laddr;
 711                 sock->faddr = faddr;
 712                 sock->vflag = xip->inp_vflag;
 713                 if (proto == IPPROTO_TCP) {
 714                         sock->state = xtp->t_state;
 715                         memcpy(sock->stack, xtp->xt_stack,
 716                             TCP_FUNCTION_NAME_LEN_MAX);
 717                 }
 718                 sock->protoname = protoname;
 719                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 720                 sock->next = sockhash[hash];
 721                 sockhash[hash] = sock;
 722         }
 723 out:
 724         free(buf);
 725 }
 726
 727 static void
 728 gather_unix(int proto)
 729 {
 730         struct xunpgen *xug, *exug;
 731         struct xunpcb *xup;
 732         struct sock *sock;
 733         struct addr *laddr, *faddr;
 734         const char *varname, *protoname;
 735         size_t len, bufsize;
 736         void *buf;
 737         int hash, retry;
 738
 739         switch (proto) {
 740         case SOCK_STREAM:
 741                 varname = "net.local.stream.pcblist";
 742                 protoname = "stream";
 743                 break;
 744         case SOCK_DGRAM:
 745                 varname = "net.local.dgram.pcblist";
 746                 protoname = "dgram";
 747                 break;
 748         case SOCK_SEQPACKET:
 749                 varname = "net.local.seqpacket.pcblist";
 750                 protoname = "seqpac";
 751                 break;
 752         default:
 753                 abort();
 754         }
 755         buf = NULL;
 756         bufsize = 8192;
 757         retry = 5;
 758         do {
 759                 for (;;) {
 760                         if ((buf = realloc(buf, bufsize)) == NULL)
 761                                 err(1, "realloc()");
 762                         len = bufsize;
 763                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 764                                 break;
 765                         if (errno != ENOMEM || len != bufsize)
 766                                 err(1, "sysctlbyname()");
 767                         bufsize *= 2;
 768                 }
 769                 xug = (struct xunpgen *)buf;
 770                 exug = (struct xunpgen *)(void *)
 771                     ((char *)buf + len - sizeof(*exug));
 772                 if (xug->xug_len != sizeof(*xug) ||
 773                     exug->xug_len != sizeof(*exug)) {
 774                         warnx("struct xinpgen size mismatch");
 775                         goto out;
 776                 }
 777         } while (xug->xug_gen != exug->xug_gen && retry--);
 778
 779         if (xug->xug_gen != exug->xug_gen && opt_v)
 780                 warnx("warning: data may be inconsistent");
 781
 782         for (;;) {
 783                 xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
 784                 if (xug >= exug)
 785                         break;
 786                 xup = (struct xunpcb *)xug;
 787                 if (xup->xu_len != sizeof(*xup)) {
 788                         warnx("struct xunpcb size mismatch");
 789                         goto out;
 790                 }
 791                 if ((xup->unp_conn == NULL && !opt_l) ||
 792                     (xup->unp_conn != NULL && !opt_c))
 793                         continue;
 794                 if ((sock = calloc(1, sizeof(*sock))) == NULL)
 795                         err(1, "malloc()");
 796                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 797                         err(1, "malloc()");
 798                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 799                         err(1, "malloc()");
 800                 sock->socket = xup->xu_socket.xso_so;
 801                 sock->pcb = xup->xu_unpp;
 802                 sock->proto = proto;
 803                 sock->family = AF_UNIX;
 804                 sock->protoname = protoname;
 805                 if (xup->xu_addr.sun_family == AF_UNIX)
 806                         laddr->address =
 807                             *(struct sockaddr_storage *)(void *)&xup->xu_addr;
 808                 else if (xup->unp_conn != NULL)
 809                         *(void **)&(faddr->address) = xup->unp_conn;
 810                 laddr->next = NULL;
 811                 faddr->next = NULL;
 812                 sock->laddr = laddr;
 813                 sock->faddr = faddr;
 814                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 815                 sock->next = sockhash[hash];
 816                 sockhash[hash] = sock;
 817         }
 818 out:
 819         free(buf);
 820 }
 821
 822 static void
 823 getfiles(void)
 824 {
 825         size_t len, olen;
 826
 827         olen = len = sizeof(*xfiles);
 828         if ((xfiles = malloc(len)) == NULL)
 829                 err(1, "malloc()");
 830         while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
 831                 if (errno != ENOMEM || len != olen)
 832                         err(1, "sysctlbyname()");
 833                 olen = len *= 2;
 834                 if ((xfiles = realloc(xfiles, len)) == NULL)
 835                         err(1, "realloc()");
 836         }
 837         if (len > 0 && xfiles->xf_size != sizeof(*xfiles))
 838                 errx(1, "struct xfile size mismatch");
 839         nxfiles = len / sizeof(*xfiles);
 840 }
 841
 842 static int
 843 printaddr(struct sockaddr_storage *ss)
 844 {
 845         struct sockaddr_un *sun;
 846         char addrstr[NI_MAXHOST] = { '\0', '\0' };
 847         int error, off, port = 0;
 848
 849         switch (ss->ss_family) {
 850         case AF_INET:
 851                 if (inet_lnaof(sstosin(ss)->sin_addr) == INADDR_ANY)
 852                         addrstr[0] = '*';
 853                 port = ntohs(sstosin(ss)->sin_port);
 854                 break;
 855         case AF_INET6:
 856                 if (IN6_IS_ADDR_UNSPECIFIED(&sstosin6(ss)->sin6_addr))
 857                         addrstr[0] = '*';
 858                 port = ntohs(sstosin6(ss)->sin6_port);
 859                 break;
 860         case AF_UNIX:
 861                 sun = sstosun(ss);
 862                 off = (int)((char *)&sun->sun_path - (char *)sun);
 863                 return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
 864         }
 865         if (addrstr[0] == '\0') {
 866                 error = getnameinfo(sstosa(ss), ss->ss_len, addrstr,
 867                     sizeof(addrstr), NULL, 0, NI_NUMERICHOST);
 868                 if (error)
 869                         errx(1, "getnameinfo()");
 870         }
 871         if (port == 0)
 872                 return xprintf("%s:*", addrstr);
 873         else
 874                 return xprintf("%s:%d", addrstr, port);
 875 }
 876
 877 static const char *
 878 getprocname(pid_t pid)
 879 {
 880         static struct kinfo_proc proc;
 881         size_t len;
 882         int mib[4];
 883
 884         mib[0] = CTL_KERN;
 885         mib[1] = KERN_PROC;
 886         mib[2] = KERN_PROC_PID;
 887         mib[3] = (int)pid;
 888         len = sizeof(proc);
 889         if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
 890                 /* Do not warn if the process exits before we get its name. */
 891                 if (errno != ESRCH)
 892                         warn("sysctl()");
 893                 return ("??");
 894         }
 895         return (proc.ki_comm);
 896 }
 897
 898 static int
 899 getprocjid(pid_t pid)
 900 {
 901         static struct kinfo_proc proc;
 902         size_t len;
 903         int mib[4];
 904
 905         mib[0] = CTL_KERN;
 906         mib[1] = KERN_PROC;
 907         mib[2] = KERN_PROC_PID;
 908         mib[3] = (int)pid;
 909         len = sizeof(proc);
 910         if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
 911                 /* Do not warn if the process exits before we get its jid. */
 912                 if (errno != ESRCH)
 913                         warn("sysctl()");
 914                 return (-1);
 915         }
 916         return (proc.ki_jid);
 917 }
 918
 919 static int
 920 check_ports(struct sock *s)
 921 {
 922         int port;
 923         struct addr *addr;
 924
 925         if (ports == NULL)
 926                 return (1);
 927         if ((s->family != AF_INET) && (s->family != AF_INET6))
 928                 return (1);
 929         for (addr = s->laddr; addr != NULL; addr = addr->next) {
 930                 if (s->family == AF_INET)
 931                         port = ntohs(sstosin(&addr->address)->sin_port);
 932                 else
 933                         port = ntohs(sstosin6(&addr->address)->sin6_port);
 934                 if (CHK_PORT(port))
 935                         return (1);
 936         }
 937         for (addr = s->faddr; addr != NULL; addr = addr->next) {
 938                 if (s->family == AF_INET)
 939                         port = ntohs(sstosin(&addr->address)->sin_port);
 940                 else
 941                         port = ntohs(sstosin6(&addr->address)->sin6_port);
 942                 if (CHK_PORT(port))
 943                         return (1);
 944         }
 945         return (0);
 946 }
 947
 948 static const char *
 949 sctp_conn_state(int state)
 950 {
 951         switch (state) {
 952         case SCTP_CLOSED:
 953                 return "CLOSED";
 954                 break;
 955         case SCTP_BOUND:
 956                 return "BOUND";
 957                 break;
 958         case SCTP_LISTEN:
 959                 return "LISTEN";
 960                 break;
 961         case SCTP_COOKIE_WAIT:
 962                 return "COOKIE_WAIT";
 963                 break;
 964         case SCTP_COOKIE_ECHOED:
 965                 return "COOKIE_ECHOED";
 966                 break;
 967         case SCTP_ESTABLISHED:
 968                 return "ESTABLISHED";
 969                 break;
 970         case SCTP_SHUTDOWN_SENT:
 971                 return "SHUTDOWN_SENT";
 972                 break;
 973         case SCTP_SHUTDOWN_RECEIVED:
 974                 return "SHUTDOWN_RECEIVED";
 975                 break;
 976         case SCTP_SHUTDOWN_ACK_SENT:
 977                 return "SHUTDOWN_ACK_SENT";
 978                 break;
 979         case SCTP_SHUTDOWN_PENDING:
 980                 return "SHUTDOWN_PENDING";
 981                 break;
 982         default:
 983                 return "UNKNOWN";
 984                 break;
 985         }
 986 }
 987
 988 static const char *
 989 sctp_path_state(int state)
 990 {
 991         switch (state) {
 992         case SCTP_UNCONFIRMED:
 993                 return "UNCONFIRMED";
 994                 break;
 995         case SCTP_ACTIVE:
 996                 return "ACTIVE";
 997                 break;
 998         case SCTP_INACTIVE:
 999                 return "INACTIVE";
1000                 break;
1001         default:
1002                 return "UNKNOWN";
1003                 break;
1004         }
1005 }
1006
1007 static void
1008 displaysock(struct sock *s, int pos)
1009 {
1010         void *p;
1011         int hash, first, offset;
1012         struct addr *laddr, *faddr;
1013         struct sock *s_tmp;
1014
1015         while (pos < 29)
1016                 pos += xprintf(" ");
1017         pos += xprintf("%s", s->protoname);
1018         if (s->vflag & INP_IPV4)
1019                 pos += xprintf("4");
1020         if (s->vflag & INP_IPV6)
1021                 pos += xprintf("6");
1022         if (s->vflag & (INP_IPV4 | INP_IPV6))
1023                 pos += xprintf(" ");
1024         laddr = s->laddr;
1025         faddr = s->faddr;
1026         first = 1;
1027         while (laddr != NULL || faddr != NULL) {
1028                 offset = 36;
1029                 while (pos < offset)
1030                         pos += xprintf(" ");
1031                 switch (s->family) {
1032                 case AF_INET:
1033                 case AF_INET6:
1034                         if (laddr != NULL) {
1035                                 pos += printaddr(&laddr->address);
1036                                 if (s->family == AF_INET6 && pos >= 58)
1037                                         pos += xprintf(" ");
1038                         }
1039                         offset += opt_w ? 46 : 22;
1040                         while (pos < offset)
1041                                 pos += xprintf(" ");
1042                         if (faddr != NULL)
1043                                 pos += printaddr(&faddr->address);
1044                         offset += opt_w ? 46 : 22;
1045                         break;
1046                 case AF_UNIX:
1047                         if ((laddr == NULL) || (faddr == NULL))
1048                                 errx(1, "laddr = %p or faddr = %p is NULL",
1049                                     (void *)laddr, (void *)faddr);
1050                         /* server */
1051                         if (laddr->address.ss_len > 0) {
1052                                 pos += printaddr(&laddr->address);
1053                                 break;
1054                         }
1055                         /* client */
1056                         p = *(void **)&(faddr->address);
1057                         if (p == NULL) {
1058                                 pos += xprintf("(not connected)");
1059                                 offset += opt_w ? 92 : 44;
1060                                 break;
1061                         }
1062                         pos += xprintf("-> ");
1063                         for (hash = 0; hash < HASHSIZE; ++hash) {
1064                                 for (s_tmp = sockhash[hash];
1065                                     s_tmp != NULL;
1066                                     s_tmp = s_tmp->next)
1067                                         if (s_tmp->pcb == p)
1068                                                 break;
1069                                 if (s_tmp != NULL)
1070                                         break;
1071                         }
1072                         if (s_tmp == NULL || s_tmp->laddr == NULL ||
1073                             s_tmp->laddr->address.ss_len == 0)
1074                                 pos += xprintf("??");
1075                         else
1076                                 pos += printaddr(&s_tmp->laddr->address);
1077                         offset += opt_w ? 92 : 44;
1078                         break;
1079                 default:
1080                         abort();
1081                 }
1082                 if (opt_U) {
1083                         if (faddr != NULL &&
1084                             s->proto == IPPROTO_SCTP &&
1085                             s->state != SCTP_CLOSED &&
1086                             s->state != SCTP_BOUND &&
1087                             s->state != SCTP_LISTEN) {
1088                                 while (pos < offset)
1089                                         pos += xprintf(" ");
1090                                 pos += xprintf("%u",
1091                                     ntohs(faddr->encaps_port));
1092                         }
1093                         offset += 7;
1094                 }
1095                 if (opt_s) {
1096                         if (faddr != NULL &&
1097                             s->proto == IPPROTO_SCTP &&
1098                             s->state != SCTP_CLOSED &&
1099                             s->state != SCTP_BOUND &&
1100                             s->state != SCTP_LISTEN) {
1101                                 while (pos < offset)
1102                                         pos += xprintf(" ");
1103                                 pos += xprintf("%s",
1104                                     sctp_path_state(faddr->state));
1105                         }
1106                         offset += 13;
1107                 }
1108                 if (first) {
1109                         if (opt_s) {
1110                                 if (s->proto == IPPROTO_SCTP ||
1111                                     s->proto == IPPROTO_TCP) {
1112                                         while (pos < offset)
1113                                                 pos += xprintf(" ");
1114                                         switch (s->proto) {
1115                                         case IPPROTO_SCTP:
1116                                                 pos += xprintf("%s",
1117                                                     sctp_conn_state(s->state));
1118                                                 break;
1119                                         case IPPROTO_TCP:
1120                                                 if (s->state >= 0 &&
1121                                                     s->state < TCP_NSTATES)
1122                                                         pos += xprintf("%s",
1123                                                             tcpstates[s->state]);
1124                                                 else
1125                                                         pos += xprintf("?");
1126                                                 break;
1127                                         }
1128                                 }
1129                                 offset += 13;
1130                         }
1131                         if (opt_S && s->proto == IPPROTO_TCP) {
1132                                 while (pos < offset)
1133                                         pos += xprintf(" ");
1134                                 xprintf("%.*s", TCP_FUNCTION_NAME_LEN_MAX,
1135                                     s->stack);
1136                         }
1137                 }
1138                 if (laddr != NULL)
1139                         laddr = laddr->next;
1140                 if (faddr != NULL)
1141                         faddr = faddr->next;
1142                 if ((laddr != NULL) || (faddr != NULL)) {
1143                         xprintf("\n");
1144                         pos = 0;
1145                 }
1146                 first = 0;
1147         }
1148         xprintf("\n");
1149 }
1150
1151 static void
1152 display(void)
1153 {
1154         struct passwd *pwd;
1155         struct xfile *xf;
1156         struct sock *s;
1157         int hash, n, pos;
1158
1159         if (opt_q != 1) {
1160                 printf("%-8s %-10s %-5s %-2s %-6s %-*s %-*s",
1161                     "USER", "COMMAND", "PID", "FD", "PROTO",
1162                     opt_w ? 45 : 21, "LOCAL ADDRESS",
1163                     opt_w ? 45 : 21, "FOREIGN ADDRESS");
1164                 if (opt_U)
1165                         printf(" %-6s", "ENCAPS");
1166                 if (opt_s) {
1167                         printf(" %-12s", "PATH STATE");
1168                         printf(" %-12s", "CONN STATE");
1169                 }
1170                 if (opt_S)
1171                         printf(" %.*s", TCP_FUNCTION_NAME_LEN_MAX, "STACK");
1172                 printf("\n");
1173         }
1174         setpassent(1);
1175         for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
1176                 if (xf->xf_data == NULL)
1177                         continue;
1178                 if (opt_j >= 0 && opt_j != getprocjid(xf->xf_pid))
1179                         continue;
1180                 hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
1181                 for (s = sockhash[hash]; s != NULL; s = s->next) {
1182                         if ((void *)s->socket != xf->xf_data)
1183                                 continue;
1184                         if (!check_ports(s))
1185                                 continue;
1186                         s->shown = 1;
1187                         pos = 0;
1188                         if ((pwd = getpwuid(xf->xf_uid)) == NULL)
1189                                 pos += xprintf("%lu ", (u_long)xf->xf_uid);
1190                         else
1191                                 pos += xprintf("%s ", pwd->pw_name);
1192                         while (pos < 9)
1193                                 pos += xprintf(" ");
1194                         pos += xprintf("%.10s", getprocname(xf->xf_pid));
1195                         while (pos < 20)
1196                                 pos += xprintf(" ");
1197                         pos += xprintf("%lu ", (u_long)xf->xf_pid);
1198                         while (pos < 26)
1199                                 pos += xprintf(" ");
1200                         pos += xprintf("%d ", xf->xf_fd);
1201                         displaysock(s, pos);
1202                 }
1203         }
1204         if (opt_j >= 0)
1205                 return;
1206         for (hash = 0; hash < HASHSIZE; hash++) {
1207                 for (s = sockhash[hash]; s != NULL; s = s->next) {
1208                         if (s->shown)
1209                                 continue;
1210                         if (!check_ports(s))
1211                                 continue;
1212                         pos = 0;
1213                         pos += xprintf("%-8s %-10s %-5s %-2s ",
1214                             "?", "?", "?", "?");
1215                         displaysock(s, pos);
1216                 }
1217         }
1218 }
1219
1220 static int set_default_protos(void)
1221 {
1222         struct protoent *prot;
1223         const char *pname;
1224         size_t pindex;
1225
1226         init_protos(default_numprotos);
1227
1228         for (pindex = 0; pindex < default_numprotos; pindex++) {
1229                 pname = default_protos[pindex];
1230                 prot = getprotobyname(pname);
1231                 if (prot == NULL)
1232                         err(1, "getprotobyname: %s", pname);
1233                 protos[pindex] = prot->p_proto;
1234         }
1235         numprotos = pindex;
1236         return (pindex);
1237 }
1238
1239 static void
1240 usage(void)
1241 {
1242         fprintf(stderr,
1243             "usage: sockstat [-46cLlSsUuvw] [-j jid] [-p ports] [-P protocols]\n");
1244         exit(1);
1245 }
1246
1247 int
1248 main(int argc, char *argv[])
1249 {
1250         int protos_defined = -1;
1251         int o, i;
1252
1253         opt_j = -1;
1254         while ((o = getopt(argc, argv, "46cj:Llp:P:qSsUuvw")) != -1)
1255                 switch (o) {
1256                 case '4':
1257                         opt_4 = 1;
1258                         break;
1259                 case '6':
1260                         opt_6 = 1;
1261                         break;
1262                 case 'c':
1263                         opt_c = 1;
1264                         break;
1265                 case 'j':
1266                         opt_j = atoi(optarg);
1267                         break;
1268                 case 'L':
1269                         opt_L = 1;
1270                         break;
1271                 case 'l':
1272                         opt_l = 1;
1273                         break;
1274                 case 'p':
1275                         parse_ports(optarg);
1276                         break;
1277                 case 'P':
1278                         protos_defined = parse_protos(optarg);
1279                         break;
1280                 case 'q':
1281                         opt_q = 1;
1282                         break;
1283                 case 'S':
1284                         opt_S = 1;
1285                         break;
1286                 case 's':
1287                         opt_s = 1;
1288                         break;
1289                 case 'U':
1290                         opt_U = 1;
1291                         break;
1292                 case 'u':
1293                         opt_u = 1;
1294                         break;
1295                 case 'v':
1296                         ++opt_v;
1297                         break;
1298                 case 'w':
1299                         opt_w = 1;
1300                         break;
1301                 default:
1302                         usage();
1303                 }
1304
1305         argc -= optind;
1306         argv += optind;
1307
1308         if (argc > 0)
1309                 usage();
1310
1311         if ((!opt_4 && !opt_6) && protos_defined != -1)
1312                 opt_4 = opt_6 = 1;
1313         if (!opt_4 && !opt_6 && !opt_u)
1314                 opt_4 = opt_6 = opt_u = 1;
1315         if ((opt_4 || opt_6) && protos_defined == -1)
1316                 protos_defined = set_default_protos();
1317         if (!opt_c && !opt_l)
1318                 opt_c = opt_l = 1;
1319
1320         if (opt_4 || opt_6) {
1321                 for (i = 0; i < protos_defined; i++)
1322                         if (protos[i] == IPPROTO_SCTP)
1323                                 gather_sctp();
1324                         else
1325                                 gather_inet(protos[i]);
1326         }
1327
1328         if (opt_u || (protos_defined == -1 && !opt_4 && !opt_6)) {
1329                 gather_unix(SOCK_STREAM);
1330                 gather_unix(SOCK_DGRAM);
1331                 gather_unix(SOCK_SEQPACKET);
1332         }
1333         getfiles();
1334         display();
1335         exit(0);
1336 }