usr.bin/sockstat/sockstat.c

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