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 <jail.h>
  61 #include <netdb.h>
  62 #include <pwd.h>
  63 #include <stdarg.h>
  64 #include <stdio.h>
  65 #include <stdlib.h>
  66 #include <string.h>
  67 #include <unistd.h>
  68
  69 #define sstosin(ss)     ((struct sockaddr_in *)(ss))
  70 #define sstosin6(ss)    ((struct sockaddr_in6 *)(ss))
  71 #define sstosun(ss)     ((struct sockaddr_un *)(ss))
  72 #define sstosa(ss)      ((struct sockaddr *)(ss))
  73
  74 static int       opt_4;         /* Show IPv4 sockets */
  75 static int       opt_6;         /* Show IPv6 sockets */
  76 static int       opt_c;         /* Show connected sockets */
  77 static int       opt_j;         /* Show specified jail */
  78 static int       opt_L;         /* Don't show IPv4 or IPv6 loopback sockets */
  79 static int       opt_l;         /* Show listening sockets */
  80 static int       opt_q;         /* Don't show header */
  81 static int       opt_S;         /* Show protocol stack if applicable */
  82 static int       opt_s;         /* Show protocol state if applicable */
  83 static int       opt_U;         /* Show remote UDP encapsulation port number */
  84 static int       opt_u;         /* Show Unix domain sockets */
  85 static int       opt_v;         /* Verbose mode */
  86 static int       opt_w;         /* Wide print area for addresses */
  87
  88 /*
  89  * Default protocols to use if no -P was defined.
  90  */
  91 static const char *default_protos[] = {"sctp", "tcp", "udp", "divert" };
  92 static size_t      default_numprotos = nitems(default_protos);
  93
  94 static int      *protos;        /* protocols to use */
  95 static size_t    numprotos;     /* allocated size of protos[] */
  96
  97 static int      *ports;
  98
  99 #define INT_BIT (sizeof(int)*CHAR_BIT)
 100 #define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
 101 #define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
 102
 103 struct addr {
 104         struct sockaddr_storage address;
 105         unsigned int encaps_port;
 106         int state;
 107         struct addr *next;
 108 };
 109
 110 struct sock {
 111         kvaddr_t socket;
 112         kvaddr_t pcb;
 113         int shown;
 114         int vflag;
 115         int family;
 116         int proto;
 117         int state;
 118         const char *protoname;
 119         char stack[TCP_FUNCTION_NAME_LEN_MAX];
 120         struct addr *laddr;
 121         struct addr *faddr;
 122         struct sock *next;
 123 };
 124
 125 #define HASHSIZE 1009
 126 static struct sock *sockhash[HASHSIZE];
 127
 128 static struct xfile *xfiles;
 129 static int nxfiles;
 130
 131 static int
 132 xprintf(const char *fmt, ...)
 133 {
 134         va_list ap;
 135         int len;
 136
 137         va_start(ap, fmt);
 138         len = vprintf(fmt, ap);
 139         va_end(ap);
 140         if (len < 0)
 141                 err(1, "printf()");
 142         return (len);
 143 }
 144
 145 static int
 146 get_proto_type(const char *proto)
 147 {
 148         struct protoent *pent;
 149
 150         if (strlen(proto) == 0)
 151                 return (0);
 152         pent = getprotobyname(proto);
 153         if (pent == NULL) {
 154                 warn("getprotobyname");
 155                 return (-1);
 156         }
 157         return (pent->p_proto);
 158 }
 159
 160 static void
 161 init_protos(int num)
 162 {
 163         int proto_count = 0;
 164
 165         if (num > 0) {
 166                 proto_count = num;
 167         } else {
 168                 /* Find the maximum number of possible protocols. */
 169                 while (getprotoent() != NULL)
 170                         proto_count++;
 171                 endprotoent();
 172         }
 173
 174         if ((protos = malloc(sizeof(int) * proto_count)) == NULL)
 175                 err(1, "malloc");
 176         numprotos = proto_count;
 177 }
 178
 179 static int
 180 parse_protos(char *protospec)
 181 {
 182         char *prot;
 183         int proto_type, proto_index;
 184
 185         if (protospec == NULL)
 186                 return (-1);
 187
 188         init_protos(0);
 189         proto_index = 0;
 190         while ((prot = strsep(&protospec, ",")) != NULL) {
 191                 if (strlen(prot) == 0)
 192                         continue;
 193                 proto_type = get_proto_type(prot);
 194                 if (proto_type != -1)
 195                         protos[proto_index++] = proto_type;
 196         }
 197         numprotos = proto_index;
 198         return (proto_index);
 199 }
 200
 201 static void
 202 parse_ports(const char *portspec)
 203 {
 204         const char *p, *q;
 205         int port, end;
 206
 207         if (ports == NULL)
 208                 if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
 209                         err(1, "calloc()");
 210         p = portspec;
 211         while (*p != '\0') {
 212                 if (!isdigit(*p))
 213                         errx(1, "syntax error in port range");
 214                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 215                         /* nothing */ ;
 216                 for (port = 0; p < q; ++p)
 217                         port = port * 10 + digittoint(*p);
 218                 if (port < 0 || port > 65535)
 219                         errx(1, "invalid port number");
 220                 SET_PORT(port);
 221                 switch (*p) {
 222                 case '-':
 223                         ++p;
 224                         break;
 225                 case ',':
 226                         ++p;
 227                         /* fall through */
 228                 case '\0':
 229                 default:
 230                         continue;
 231                 }
 232                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 233                         /* nothing */ ;
 234                 for (end = 0; p < q; ++p)
 235                         end = end * 10 + digittoint(*p);
 236                 if (end < port || end > 65535)
 237                         errx(1, "invalid port number");
 238                 while (port++ < end)
 239                         SET_PORT(port);
 240                 if (*p == ',')
 241                         ++p;
 242         }
 243 }
 244
 245 static void
 246 sockaddr(struct sockaddr_storage *ss, int af, void *addr, int port)
 247 {
 248         struct sockaddr_in *sin4;
 249         struct sockaddr_in6 *sin6;
 250
 251         bzero(ss, sizeof(*ss));
 252         switch (af) {
 253         case AF_INET:
 254                 sin4 = sstosin(ss);
 255                 sin4->sin_len = sizeof(*sin4);
 256                 sin4->sin_family = af;
 257                 sin4->sin_port = port;
 258                 sin4->sin_addr = *(struct in_addr *)addr;
 259                 break;
 260         case AF_INET6:
 261                 sin6 = sstosin6(ss);
 262                 sin6->sin6_len = sizeof(*sin6);
 263                 sin6->sin6_family = af;
 264                 sin6->sin6_port = port;
 265                 sin6->sin6_addr = *(struct in6_addr *)addr;
 266 #define s6_addr16       __u6_addr.__u6_addr16
 267                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 268                         sin6->sin6_scope_id =
 269                             ntohs(sin6->sin6_addr.s6_addr16[1]);
 270                         sin6->sin6_addr.s6_addr16[1] = 0;
 271                 }
 272                 break;
 273         default:
 274                 abort();
 275         }
 276 }
 277
 278 static void
 279 free_socket(struct sock *sock)
 280 {
 281         struct addr *cur, *next;
 282
 283         cur = sock->laddr;
 284         while (cur != NULL) {
 285                 next = cur->next;
 286                 free(cur);
 287                 cur = next;
 288         }
 289         cur = sock->faddr;
 290         while (cur != NULL) {
 291                 next = cur->next;
 292                 free(cur);
 293                 cur = next;
 294         }
 295         free(sock);
 296 }
 297
 298 static void
 299 gather_sctp(void)
 300 {
 301         struct sock *sock;
 302         struct addr *laddr, *prev_laddr, *faddr, *prev_faddr;
 303         struct xsctp_inpcb *xinpcb;
 304         struct xsctp_tcb *xstcb;
 305         struct xsctp_raddr *xraddr;
 306         struct xsctp_laddr *xladdr;
 307         const char *varname;
 308         size_t len, offset;
 309         char *buf;
 310         int hash, vflag;
 311         int no_stcb, local_all_loopback, foreign_all_loopback;
 312
 313         vflag = 0;
 314         if (opt_4)
 315                 vflag |= INP_IPV4;
 316         if (opt_6)
 317                 vflag |= INP_IPV6;
 318
 319         varname = "net.inet.sctp.assoclist";
 320         if (sysctlbyname(varname, 0, &len, 0, 0) < 0) {
 321                 if (errno != ENOENT)
 322                         err(1, "sysctlbyname()");
 323                 return;
 324         }
 325         if ((buf = (char *)malloc(len)) == NULL) {
 326                 err(1, "malloc()");
 327                 return;
 328         }
 329         if (sysctlbyname(varname, buf, &len, 0, 0) < 0) {
 330                 err(1, "sysctlbyname()");
 331                 free(buf);
 332                 return;
 333         }
 334         xinpcb = (struct xsctp_inpcb *)(void *)buf;
 335         offset = sizeof(struct xsctp_inpcb);
 336         while ((offset < len) && (xinpcb->last == 0)) {
 337                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 338                         err(1, "malloc()");
 339                 sock->socket = xinpcb->socket;
 340                 sock->proto = IPPROTO_SCTP;
 341                 sock->protoname = "sctp";
 342                 if (xinpcb->maxqlen == 0)
 343                         sock->state = SCTP_CLOSED;
 344                 else
 345                         sock->state = SCTP_LISTEN;
 346                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 347                         sock->family = AF_INET6;
 348                         /*
 349                          * Currently there is no way to distinguish between
 350                          * IPv6 only sockets or dual family sockets.
 351                          * So mark it as dual socket.
 352                          */
 353                         sock->vflag = INP_IPV6 | INP_IPV4;
 354                 } else {
 355                         sock->family = AF_INET;
 356                         sock->vflag = INP_IPV4;
 357                 }
 358                 prev_laddr = NULL;
 359                 local_all_loopback = 1;
 360                 while (offset < len) {
 361                         xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
 362                         offset += sizeof(struct xsctp_laddr);
 363                         if (xladdr->last == 1)
 364                                 break;
 365                         if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
 366                                 err(1, "malloc()");
 367                         switch (xladdr->address.sa.sa_family) {
 368                         case AF_INET:
 369 #define __IN_IS_ADDR_LOOPBACK(pina) \
 370         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 371                                 if (!__IN_IS_ADDR_LOOPBACK(
 372                                     &xladdr->address.sin.sin_addr))
 373                                         local_all_loopback = 0;
 374 #undef  __IN_IS_ADDR_LOOPBACK
 375                                 sockaddr(&laddr->address, AF_INET,
 376                                     &xladdr->address.sin.sin_addr,
 377                                     htons(xinpcb->local_port));
 378                                 break;
 379                         case AF_INET6:
 380                                 if (!IN6_IS_ADDR_LOOPBACK(
 381                                     &xladdr->address.sin6.sin6_addr))
 382                                         local_all_loopback = 0;
 383                                 sockaddr(&laddr->address, AF_INET6,
 384                                     &xladdr->address.sin6.sin6_addr,
 385                                     htons(xinpcb->local_port));
 386                                 break;
 387                         default:
 388                                 errx(1, "address family %d not supported",
 389                                     xladdr->address.sa.sa_family);
 390                         }
 391                         laddr->next = NULL;
 392                         if (prev_laddr == NULL)
 393                                 sock->laddr = laddr;
 394                         else
 395                                 prev_laddr->next = laddr;
 396                         prev_laddr = laddr;
 397                 }
 398                 if (sock->laddr == NULL) {
 399                         if ((sock->laddr =
 400                             calloc(1, sizeof(struct addr))) == NULL)
 401                                 err(1, "malloc()");
 402                         sock->laddr->address.ss_family = sock->family;
 403                         if (sock->family == AF_INET)
 404                                 sock->laddr->address.ss_len =
 405                                     sizeof(struct sockaddr_in);
 406                         else
 407                                 sock->laddr->address.ss_len =
 408                                     sizeof(struct sockaddr_in6);
 409                         local_all_loopback = 0;
 410                 }
 411                 if ((sock->faddr = calloc(1, sizeof(struct addr))) == NULL)
 412                         err(1, "malloc()");
 413                 sock->faddr->address.ss_family = sock->family;
 414                 if (sock->family == AF_INET)
 415                         sock->faddr->address.ss_len =
 416                             sizeof(struct sockaddr_in);
 417                 else
 418                         sock->faddr->address.ss_len =
 419                             sizeof(struct sockaddr_in6);
 420                 no_stcb = 1;
 421                 while (offset < len) {
 422                         xstcb = (struct xsctp_tcb *)(void *)(buf + offset);
 423                         offset += sizeof(struct xsctp_tcb);
 424                         if (no_stcb) {
 425                                 if (opt_l && (sock->vflag & vflag) &&
 426                                     (!opt_L || !local_all_loopback) &&
 427                                     ((xinpcb->flags & SCTP_PCB_FLAGS_UDPTYPE) ||
 428                                      (xstcb->last == 1))) {
 429                                         hash = (int)((uintptr_t)sock->socket %
 430                                             HASHSIZE);
 431                                         sock->next = sockhash[hash];
 432                                         sockhash[hash] = sock;
 433                                 } else {
 434                                         free_socket(sock);
 435                                 }
 436                         }
 437                         if (xstcb->last == 1)
 438                                 break;
 439                         no_stcb = 0;
 440                         if (opt_c) {
 441                                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 442                                         err(1, "malloc()");
 443                                 sock->socket = xinpcb->socket;
 444                                 sock->proto = IPPROTO_SCTP;
 445                                 sock->protoname = "sctp";
 446                                 sock->state = (int)xstcb->state;
 447                                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 448                                         sock->family = AF_INET6;
 449                                 /*
 450                                  * Currently there is no way to distinguish
 451                                  * between IPv6 only sockets or dual family
 452                                  *  sockets. So mark it as dual socket.
 453                                  */
 454                                         sock->vflag = INP_IPV6 | INP_IPV4;
 455                                 } else {
 456                                         sock->family = AF_INET;
 457                                         sock->vflag = INP_IPV4;
 458                                 }
 459                         }
 460                         prev_laddr = NULL;
 461                         local_all_loopback = 1;
 462                         while (offset < len) {
 463                                 xladdr = (struct xsctp_laddr *)(void *)(buf +
 464                                     offset);
 465                                 offset += sizeof(struct xsctp_laddr);
 466                                 if (xladdr->last == 1)
 467                                         break;
 468                                 if (!opt_c)
 469                                         continue;
 470                                 laddr = calloc(1, sizeof(struct addr));
 471                                 if (laddr == NULL)
 472                                         err(1, "malloc()");
 473                                 switch (xladdr->address.sa.sa_family) {
 474                                 case AF_INET:
 475 #define __IN_IS_ADDR_LOOPBACK(pina) \
 476         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 477                                         if (!__IN_IS_ADDR_LOOPBACK(
 478                                             &xladdr->address.sin.sin_addr))
 479                                                 local_all_loopback = 0;
 480 #undef  __IN_IS_ADDR_LOOPBACK
 481                                         sockaddr(&laddr->address, AF_INET,
 482                                             &xladdr->address.sin.sin_addr,
 483                                             htons(xstcb->local_port));
 484                                         break;
 485                                 case AF_INET6:
 486                                         if (!IN6_IS_ADDR_LOOPBACK(
 487                                             &xladdr->address.sin6.sin6_addr))
 488                                                 local_all_loopback = 0;
 489                                         sockaddr(&laddr->address, AF_INET6,
 490                                             &xladdr->address.sin6.sin6_addr,
 491                                             htons(xstcb->local_port));
 492                                         break;
 493                                 default:
 494                                         errx(1,
 495                                             "address family %d not supported",
 496                                             xladdr->address.sa.sa_family);
 497                                 }
 498                                 laddr->next = NULL;
 499                                 if (prev_laddr == NULL)
 500                                         sock->laddr = laddr;
 501                                 else
 502                                         prev_laddr->next = laddr;
 503                                 prev_laddr = laddr;
 504                         }
 505                         prev_faddr = NULL;
 506                         foreign_all_loopback = 1;
 507                         while (offset < len) {
 508                                 xraddr = (struct xsctp_raddr *)(void *)(buf +
 509                                     offset);
 510                                 offset += sizeof(struct xsctp_raddr);
 511                                 if (xraddr->last == 1)
 512                                         break;
 513                                 if (!opt_c)
 514                                         continue;
 515                                 faddr = calloc(1, sizeof(struct addr));
 516                                 if (faddr == NULL)
 517                                         err(1, "malloc()");
 518                                 switch (xraddr->address.sa.sa_family) {
 519                                 case AF_INET:
 520 #define __IN_IS_ADDR_LOOPBACK(pina) \
 521         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 522                                         if (!__IN_IS_ADDR_LOOPBACK(
 523                                             &xraddr->address.sin.sin_addr))
 524                                                 foreign_all_loopback = 0;
 525 #undef  __IN_IS_ADDR_LOOPBACK
 526                                         sockaddr(&faddr->address, AF_INET,
 527                                             &xraddr->address.sin.sin_addr,
 528                                             htons(xstcb->remote_port));
 529                                         break;
 530                                 case AF_INET6:
 531                                         if (!IN6_IS_ADDR_LOOPBACK(
 532                                             &xraddr->address.sin6.sin6_addr))
 533                                                 foreign_all_loopback = 0;
 534                                         sockaddr(&faddr->address, AF_INET6,
 535                                             &xraddr->address.sin6.sin6_addr,
 536                                             htons(xstcb->remote_port));
 537                                         break;
 538                                 default:
 539                                         errx(1,
 540                                             "address family %d not supported",
 541                                             xraddr->address.sa.sa_family);
 542                                 }
 543                                 faddr->encaps_port = xraddr->encaps_port;
 544                                 faddr->state = xraddr->state;
 545                                 faddr->next = NULL;
 546                                 if (prev_faddr == NULL)
 547                                         sock->faddr = faddr;
 548                                 else
 549                                         prev_faddr->next = faddr;
 550                                 prev_faddr = faddr;
 551                         }
 552                         if (opt_c) {
 553                                 if ((sock->vflag & vflag) &&
 554                                     (!opt_L ||
 555                                      !(local_all_loopback ||
 556                                      foreign_all_loopback))) {
 557                                         hash = (int)((uintptr_t)sock->socket %
 558                                             HASHSIZE);
 559                                         sock->next = sockhash[hash];
 560                                         sockhash[hash] = sock;
 561                                 } else {
 562                                         free_socket(sock);
 563                                 }
 564                         }
 565                 }
 566                 xinpcb = (struct xsctp_inpcb *)(void *)(buf + offset);
 567                 offset += sizeof(struct xsctp_inpcb);
 568         }
 569         free(buf);
 570 }
 571
 572 static void
 573 gather_inet(int proto)
 574 {
 575         struct xinpgen *xig, *exig;
 576         struct xinpcb *xip;
 577         struct xtcpcb *xtp = NULL;
 578         struct xsocket *so;
 579         struct sock *sock;
 580         struct addr *laddr, *faddr;
 581         const char *varname, *protoname;
 582         size_t len, bufsize;
 583         void *buf;
 584         int hash, retry, vflag;
 585
 586         vflag = 0;
 587         if (opt_4)
 588                 vflag |= INP_IPV4;
 589         if (opt_6)
 590                 vflag |= INP_IPV6;
 591
 592         switch (proto) {
 593         case IPPROTO_TCP:
 594                 varname = "net.inet.tcp.pcblist";
 595                 protoname = "tcp";
 596                 break;
 597         case IPPROTO_UDP:
 598                 varname = "net.inet.udp.pcblist";
 599                 protoname = "udp";
 600                 break;
 601         case IPPROTO_DIVERT:
 602                 varname = "net.inet.divert.pcblist";
 603                 protoname = "div";
 604                 break;
 605         default:
 606                 errx(1, "protocol %d not supported", proto);
 607         }
 608
 609         buf = NULL;
 610         bufsize = 8192;
 611         retry = 5;
 612         do {
 613                 for (;;) {
 614                         if ((buf = realloc(buf, bufsize)) == NULL)
 615                                 err(1, "realloc()");
 616                         len = bufsize;
 617                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 618                                 break;
 619                         if (errno == ENOENT)
 620                                 goto out;
 621                         if (errno != ENOMEM || len != bufsize)
 622                                 err(1, "sysctlbyname()");
 623                         bufsize *= 2;
 624                 }
 625                 xig = (struct xinpgen *)buf;
 626                 exig = (struct xinpgen *)(void *)
 627                     ((char *)buf + len - sizeof *exig);
 628                 if (xig->xig_len != sizeof *xig ||
 629                     exig->xig_len != sizeof *exig)
 630                         errx(1, "struct xinpgen size mismatch");
 631         } while (xig->xig_gen != exig->xig_gen && retry--);
 632
 633         if (xig->xig_gen != exig->xig_gen && opt_v)
 634                 warnx("warning: data may be inconsistent");
 635
 636         for (;;) {
 637                 xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
 638                 if (xig >= exig)
 639                         break;
 640                 switch (proto) {
 641                 case IPPROTO_TCP:
 642                         xtp = (struct xtcpcb *)xig;
 643                         xip = &xtp->xt_inp;
 644                         if (xtp->xt_len != sizeof(*xtp)) {
 645                                 warnx("struct xtcpcb size mismatch");
 646                                 goto out;
 647                         }
 648                         protoname = xtp->t_flags & TF_TOE ? "toe" : "tcp";
 649                         break;
 650                 case IPPROTO_UDP:
 651                 case IPPROTO_DIVERT:
 652                         xip = (struct xinpcb *)xig;
 653                         if (xip->xi_len != sizeof(*xip)) {
 654                                 warnx("struct xinpcb size mismatch");
 655                                 goto out;
 656                         }
 657                         break;
 658                 default:
 659                         errx(1, "protocol %d not supported", proto);
 660                 }
 661                 so = &xip->xi_socket;
 662                 if ((xip->inp_vflag & vflag) == 0)
 663                         continue;
 664                 if (xip->inp_vflag & INP_IPV4) {
 665                         if ((xip->inp_fport == 0 && !opt_l) ||
 666                             (xip->inp_fport != 0 && !opt_c))
 667                                 continue;
 668 #define __IN_IS_ADDR_LOOPBACK(pina) \
 669         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 670                         if (opt_L &&
 671                             (__IN_IS_ADDR_LOOPBACK(&xip->inp_faddr) ||
 672                              __IN_IS_ADDR_LOOPBACK(&xip->inp_laddr)))
 673                                 continue;
 674 #undef  __IN_IS_ADDR_LOOPBACK
 675                 } else if (xip->inp_vflag & INP_IPV6) {
 676                         if ((xip->inp_fport == 0 && !opt_l) ||
 677                             (xip->inp_fport != 0 && !opt_c))
 678                                 continue;
 679                         if (opt_L &&
 680                             (IN6_IS_ADDR_LOOPBACK(&xip->in6p_faddr) ||
 681                              IN6_IS_ADDR_LOOPBACK(&xip->in6p_laddr)))
 682                                 continue;
 683                 } else {
 684                         if (opt_v)
 685                                 warnx("invalid vflag 0x%x", xip->inp_vflag);
 686                         continue;
 687                 }
 688                 if ((sock = calloc(1, sizeof(*sock))) == NULL)
 689                         err(1, "malloc()");
 690                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 691                         err(1, "malloc()");
 692                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 693                         err(1, "malloc()");
 694                 sock->socket = so->xso_so;
 695                 sock->proto = proto;
 696                 if (xip->inp_vflag & INP_IPV4) {
 697                         sock->family = AF_INET;
 698                         sockaddr(&laddr->address, sock->family,
 699                             &xip->inp_laddr, xip->inp_lport);
 700                         sockaddr(&faddr->address, sock->family,
 701                             &xip->inp_faddr, xip->inp_fport);
 702                 } else if (xip->inp_vflag & INP_IPV6) {
 703                         sock->family = AF_INET6;
 704                         sockaddr(&laddr->address, sock->family,
 705                             &xip->in6p_laddr, xip->inp_lport);
 706                         sockaddr(&faddr->address, sock->family,
 707                             &xip->in6p_faddr, xip->inp_fport);
 708                 }
 709                 laddr->next = NULL;
 710                 faddr->next = NULL;
 711                 sock->laddr = laddr;
 712                 sock->faddr = faddr;
 713                 sock->vflag = xip->inp_vflag;
 714                 if (proto == IPPROTO_TCP) {
 715                         sock->state = xtp->t_state;
 716                         memcpy(sock->stack, xtp->xt_stack,
 717                             TCP_FUNCTION_NAME_LEN_MAX);
 718                 }
 719                 sock->protoname = protoname;
 720                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 721                 sock->next = sockhash[hash];
 722                 sockhash[hash] = sock;
 723         }
 724 out:
 725         free(buf);
 726 }
 727
 728 static void
 729 gather_unix(int proto)
 730 {
 731         struct xunpgen *xug, *exug;
 732         struct xunpcb *xup;
 733         struct sock *sock;
 734         struct addr *laddr, *faddr;
 735         const char *varname, *protoname;
 736         size_t len, bufsize;
 737         void *buf;
 738         int hash, retry;
 739
 740         switch (proto) {
 741         case SOCK_STREAM:
 742                 varname = "net.local.stream.pcblist";
 743                 protoname = "stream";
 744                 break;
 745         case SOCK_DGRAM:
 746                 varname = "net.local.dgram.pcblist";
 747                 protoname = "dgram";
 748                 break;
 749         case SOCK_SEQPACKET:
 750                 varname = "net.local.seqpacket.pcblist";
 751                 protoname = "seqpac";
 752                 break;
 753         default:
 754                 abort();
 755         }
 756         buf = NULL;
 757         bufsize = 8192;
 758         retry = 5;
 759         do {
 760                 for (;;) {
 761                         if ((buf = realloc(buf, bufsize)) == NULL)
 762                                 err(1, "realloc()");
 763                         len = bufsize;
 764                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 765                                 break;
 766                         if (errno != ENOMEM || len != bufsize)
 767                                 err(1, "sysctlbyname()");
 768                         bufsize *= 2;
 769                 }
 770                 xug = (struct xunpgen *)buf;
 771                 exug = (struct xunpgen *)(void *)
 772                     ((char *)buf + len - sizeof(*exug));
 773                 if (xug->xug_len != sizeof(*xug) ||
 774                     exug->xug_len != sizeof(*exug)) {
 775                         warnx("struct xinpgen size mismatch");
 776                         goto out;
 777                 }
 778         } while (xug->xug_gen != exug->xug_gen && retry--);
 779
 780         if (xug->xug_gen != exug->xug_gen && opt_v)
 781                 warnx("warning: data may be inconsistent");
 782
 783         for (;;) {
 784                 xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
 785                 if (xug >= exug)
 786                         break;
 787                 xup = (struct xunpcb *)xug;
 788                 if (xup->xu_len != sizeof(*xup)) {
 789                         warnx("struct xunpcb size mismatch");
 790                         goto out;
 791                 }
 792                 if ((xup->unp_conn == 0 && !opt_l) ||
 793                     (xup->unp_conn != 0 && !opt_c))
 794                         continue;
 795                 if ((sock = calloc(1, sizeof(*sock))) == NULL)
 796                         err(1, "malloc()");
 797                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 798                         err(1, "malloc()");
 799                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 800                         err(1, "malloc()");
 801                 sock->socket = xup->xu_socket.xso_so;
 802                 sock->pcb = xup->xu_unpp;
 803                 sock->proto = proto;
 804                 sock->family = AF_UNIX;
 805                 sock->protoname = protoname;
 806                 if (xup->xu_addr.sun_family == AF_UNIX)
 807                         laddr->address =
 808                             *(struct sockaddr_storage *)(void *)&xup->xu_addr;
 809                 else if (xup->unp_conn != 0)
 810                         *(kvaddr_t*)&(faddr->address) = xup->unp_conn;
 811                 laddr->next = NULL;
 812                 faddr->next = NULL;
 813                 sock->laddr = laddr;
 814                 sock->faddr = faddr;
 815                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 816                 sock->next = sockhash[hash];
 817                 sockhash[hash] = sock;
 818         }
 819 out:
 820         free(buf);
 821 }
 822
 823 static void
 824 getfiles(void)
 825 {
 826         size_t len, olen;
 827
 828         olen = len = sizeof(*xfiles);
 829         if ((xfiles = malloc(len)) == NULL)
 830                 err(1, "malloc()");
 831         while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
 832                 if (errno != ENOMEM || len != olen)
 833                         err(1, "sysctlbyname()");
 834                 olen = len *= 2;
 835                 if ((xfiles = realloc(xfiles, len)) == NULL)
 836                         err(1, "realloc()");
 837         }
 838         if (len > 0 && xfiles->xf_size != sizeof(*xfiles))
 839                 errx(1, "struct xfile size mismatch");
 840         nxfiles = len / sizeof(*xfiles);
 841 }
 842
 843 static int
 844 printaddr(struct sockaddr_storage *ss)
 845 {
 846         struct sockaddr_un *sun;
 847         char addrstr[NI_MAXHOST] = { '\0', '\0' };
 848         int error, off, port = 0;
 849
 850         switch (ss->ss_family) {
 851         case AF_INET:
 852                 if (inet_lnaof(sstosin(ss)->sin_addr) == INADDR_ANY)
 853                         addrstr[0] = '*';
 854                 port = ntohs(sstosin(ss)->sin_port);
 855                 break;
 856         case AF_INET6:
 857                 if (IN6_IS_ADDR_UNSPECIFIED(&sstosin6(ss)->sin6_addr))
 858                         addrstr[0] = '*';
 859                 port = ntohs(sstosin6(ss)->sin6_port);
 860                 break;
 861         case AF_UNIX:
 862                 sun = sstosun(ss);
 863                 off = (int)((char *)&sun->sun_path - (char *)sun);
 864                 return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
 865         }
 866         if (addrstr[0] == '\0') {
 867                 error = getnameinfo(sstosa(ss), ss->ss_len, addrstr,
 868                     sizeof(addrstr), NULL, 0, NI_NUMERICHOST);
 869                 if (error)
 870                         errx(1, "getnameinfo()");
 871         }
 872         if (port == 0)
 873                 return xprintf("%s:*", addrstr);
 874         else
 875                 return xprintf("%s:%d", addrstr, port);
 876 }
 877
 878 static const char *
 879 getprocname(pid_t pid)
 880 {
 881         static struct kinfo_proc proc;
 882         size_t len;
 883         int mib[4];
 884
 885         mib[0] = CTL_KERN;
 886         mib[1] = KERN_PROC;
 887         mib[2] = KERN_PROC_PID;
 888         mib[3] = (int)pid;
 889         len = sizeof(proc);
 890         if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
 891                 /* Do not warn if the process exits before we get its name. */
 892                 if (errno != ESRCH)
 893                         warn("sysctl()");
 894                 return ("??");
 895         }
 896         return (proc.ki_comm);
 897 }
 898
 899 static int
 900 getprocjid(pid_t pid)
 901 {
 902         static struct kinfo_proc proc;
 903         size_t len;
 904         int mib[4];
 905
 906         mib[0] = CTL_KERN;
 907         mib[1] = KERN_PROC;
 908         mib[2] = KERN_PROC_PID;
 909         mib[3] = (int)pid;
 910         len = sizeof(proc);
 911         if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
 912                 /* Do not warn if the process exits before we get its jid. */
 913                 if (errno != ESRCH)
 914                         warn("sysctl()");
 915                 return (-1);
 916         }
 917         return (proc.ki_jid);
 918 }
 919
 920 static int
 921 check_ports(struct sock *s)
 922 {
 923         int port;
 924         struct addr *addr;
 925
 926         if (ports == NULL)
 927                 return (1);
 928         if ((s->family != AF_INET) && (s->family != AF_INET6))
 929                 return (1);
 930         for (addr = s->laddr; addr != NULL; addr = addr->next) {
 931                 if (s->family == AF_INET)
 932                         port = ntohs(sstosin(&addr->address)->sin_port);
 933                 else
 934                         port = ntohs(sstosin6(&addr->address)->sin6_port);
 935                 if (CHK_PORT(port))
 936                         return (1);
 937         }
 938         for (addr = s->faddr; addr != NULL; addr = addr->next) {
 939                 if (s->family == AF_INET)
 940                         port = ntohs(sstosin(&addr->address)->sin_port);
 941                 else
 942                         port = ntohs(sstosin6(&addr->address)->sin6_port);
 943                 if (CHK_PORT(port))
 944                         return (1);
 945         }
 946         return (0);
 947 }
 948
 949 static const char *
 950 sctp_conn_state(int state)
 951 {
 952         switch (state) {
 953         case SCTP_CLOSED:
 954                 return "CLOSED";
 955                 break;
 956         case SCTP_BOUND:
 957                 return "BOUND";
 958                 break;
 959         case SCTP_LISTEN:
 960                 return "LISTEN";
 961                 break;
 962         case SCTP_COOKIE_WAIT:
 963                 return "COOKIE_WAIT";
 964                 break;
 965         case SCTP_COOKIE_ECHOED:
 966                 return "COOKIE_ECHOED";
 967                 break;
 968         case SCTP_ESTABLISHED:
 969                 return "ESTABLISHED";
 970                 break;
 971         case SCTP_SHUTDOWN_SENT:
 972                 return "SHUTDOWN_SENT";
 973                 break;
 974         case SCTP_SHUTDOWN_RECEIVED:
 975                 return "SHUTDOWN_RECEIVED";
 976                 break;
 977         case SCTP_SHUTDOWN_ACK_SENT:
 978                 return "SHUTDOWN_ACK_SENT";
 979                 break;
 980         case SCTP_SHUTDOWN_PENDING:
 981                 return "SHUTDOWN_PENDING";
 982                 break;
 983         default:
 984                 return "UNKNOWN";
 985                 break;
 986         }
 987 }
 988
 989 static const char *
 990 sctp_path_state(int state)
 991 {
 992         switch (state) {
 993         case SCTP_UNCONFIRMED:
 994                 return "UNCONFIRMED";
 995                 break;
 996         case SCTP_ACTIVE:
 997                 return "ACTIVE";
 998                 break;
 999         case SCTP_INACTIVE:
1000                 return "INACTIVE";
1001                 break;
1002         default:
1003                 return "UNKNOWN";
1004                 break;
1005         }
1006 }
1007
1008 static void
1009 displaysock(struct sock *s, int pos)
1010 {
1011         kvaddr_t p;
1012         int hash, first, offset;
1013         struct addr *laddr, *faddr;
1014         struct sock *s_tmp;
1015
1016         while (pos < 29)
1017                 pos += xprintf(" ");
1018         pos += xprintf("%s", s->protoname);
1019         if (s->vflag & INP_IPV4)
1020                 pos += xprintf("4");
1021         if (s->vflag & INP_IPV6)
1022                 pos += xprintf("6");
1023         if (s->vflag & (INP_IPV4 | INP_IPV6))
1024                 pos += xprintf(" ");
1025         laddr = s->laddr;
1026         faddr = s->faddr;
1027         first = 1;
1028         while (laddr != NULL || faddr != NULL) {
1029                 offset = 36;
1030                 while (pos < offset)
1031                         pos += xprintf(" ");
1032                 switch (s->family) {
1033                 case AF_INET:
1034                 case AF_INET6:
1035                         if (laddr != NULL) {
1036                                 pos += printaddr(&laddr->address);
1037                                 if (s->family == AF_INET6 && pos >= 58)
1038                                         pos += xprintf(" ");
1039                         }
1040                         offset += opt_w ? 46 : 22;
1041                         while (pos < offset)
1042                                 pos += xprintf(" ");
1043                         if (faddr != NULL)
1044                                 pos += printaddr(&faddr->address);
1045                         offset += opt_w ? 46 : 22;
1046                         break;
1047                 case AF_UNIX:
1048                         if ((laddr == NULL) || (faddr == NULL))
1049                                 errx(1, "laddr = %p or faddr = %p is NULL",
1050                                     (void *)laddr, (void *)faddr);
1051                         /* server */
1052                         if (laddr->address.ss_len > 0) {
1053                                 pos += printaddr(&laddr->address);
1054                                 break;
1055                         }
1056                         /* client */
1057                         p = *(kvaddr_t*)&(faddr->address);
1058                         if (p == 0) {
1059                                 pos += xprintf("(not connected)");
1060                                 offset += opt_w ? 92 : 44;
1061                                 break;
1062                         }
1063                         pos += xprintf("-> ");
1064                         for (hash = 0; hash < HASHSIZE; ++hash) {
1065                                 for (s_tmp = sockhash[hash];
1066                                     s_tmp != NULL;
1067                                     s_tmp = s_tmp->next)
1068                                         if (s_tmp->pcb == p)
1069                                                 break;
1070                                 if (s_tmp != NULL)
1071                                         break;
1072                         }
1073                         if (s_tmp == NULL || s_tmp->laddr == NULL ||
1074                             s_tmp->laddr->address.ss_len == 0)
1075                                 pos += xprintf("??");
1076                         else
1077                                 pos += printaddr(&s_tmp->laddr->address);
1078                         offset += opt_w ? 92 : 44;
1079                         break;
1080                 default:
1081                         abort();
1082                 }
1083                 if (opt_U) {
1084                         if (faddr != NULL &&
1085                             s->proto == IPPROTO_SCTP &&
1086                             s->state != SCTP_CLOSED &&
1087                             s->state != SCTP_BOUND &&
1088                             s->state != SCTP_LISTEN) {
1089                                 while (pos < offset)
1090                                         pos += xprintf(" ");
1091                                 pos += xprintf("%u",
1092                                     ntohs(faddr->encaps_port));
1093                         }
1094                         offset += 7;
1095                 }
1096                 if (opt_s) {
1097                         if (faddr != NULL &&
1098                             s->proto == IPPROTO_SCTP &&
1099                             s->state != SCTP_CLOSED &&
1100                             s->state != SCTP_BOUND &&
1101                             s->state != SCTP_LISTEN) {
1102                                 while (pos < offset)
1103                                         pos += xprintf(" ");
1104                                 pos += xprintf("%s",
1105                                     sctp_path_state(faddr->state));
1106                         }
1107                         offset += 13;
1108                 }
1109                 if (first) {
1110                         if (opt_s) {
1111                                 if (s->proto == IPPROTO_SCTP ||
1112                                     s->proto == IPPROTO_TCP) {
1113                                         while (pos < offset)
1114                                                 pos += xprintf(" ");
1115                                         switch (s->proto) {
1116                                         case IPPROTO_SCTP:
1117                                                 pos += xprintf("%s",
1118                                                     sctp_conn_state(s->state));
1119                                                 break;
1120                                         case IPPROTO_TCP:
1121                                                 if (s->state >= 0 &&
1122                                                     s->state < TCP_NSTATES)
1123                                                         pos += xprintf("%s",
1124                                                             tcpstates[s->state]);
1125                                                 else
1126                                                         pos += xprintf("?");
1127                                                 break;
1128                                         }
1129                                 }
1130                                 offset += 13;
1131                         }
1132                         if (opt_S && s->proto == IPPROTO_TCP) {
1133                                 while (pos < offset)
1134                                         pos += xprintf(" ");
1135                                 xprintf("%.*s", TCP_FUNCTION_NAME_LEN_MAX,
1136                                     s->stack);
1137                         }
1138                 }
1139                 if (laddr != NULL)
1140                         laddr = laddr->next;
1141                 if (faddr != NULL)
1142                         faddr = faddr->next;
1143                 if ((laddr != NULL) || (faddr != NULL)) {
1144                         xprintf("\n");
1145                         pos = 0;
1146                 }
1147                 first = 0;
1148         }
1149         xprintf("\n");
1150 }
1151
1152 static void
1153 display(void)
1154 {
1155         struct passwd *pwd;
1156         struct xfile *xf;
1157         struct sock *s;
1158         int hash, n, pos;
1159
1160         if (opt_q != 1) {
1161                 printf("%-8s %-10s %-5s %-2s %-6s %-*s %-*s",
1162                     "USER", "COMMAND", "PID", "FD", "PROTO",
1163                     opt_w ? 45 : 21, "LOCAL ADDRESS",
1164                     opt_w ? 45 : 21, "FOREIGN ADDRESS");
1165                 if (opt_U)
1166                         printf(" %-6s", "ENCAPS");
1167                 if (opt_s) {
1168                         printf(" %-12s", "PATH STATE");
1169                         printf(" %-12s", "CONN STATE");
1170                 }
1171                 if (opt_S)
1172                         printf(" %.*s", TCP_FUNCTION_NAME_LEN_MAX, "STACK");
1173                 printf("\n");
1174         }
1175         setpassent(1);
1176         for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
1177                 if (xf->xf_data == 0)
1178                         continue;
1179                 if (opt_j >= 0 && opt_j != getprocjid(xf->xf_pid))
1180                         continue;
1181                 hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
1182                 for (s = sockhash[hash]; s != NULL; s = s->next) {
1183                         if (s->socket != xf->xf_data)
1184                                 continue;
1185                         if (!check_ports(s))
1186                                 continue;
1187                         s->shown = 1;
1188                         pos = 0;
1189                         if ((pwd = getpwuid(xf->xf_uid)) == NULL)
1190                                 pos += xprintf("%lu ", (u_long)xf->xf_uid);
1191                         else
1192                                 pos += xprintf("%s ", pwd->pw_name);
1193                         while (pos < 9)
1194                                 pos += xprintf(" ");
1195                         pos += xprintf("%.10s", getprocname(xf->xf_pid));
1196                         while (pos < 20)
1197                                 pos += xprintf(" ");
1198                         pos += xprintf("%lu ", (u_long)xf->xf_pid);
1199                         while (pos < 26)
1200                                 pos += xprintf(" ");
1201                         pos += xprintf("%d ", xf->xf_fd);
1202                         displaysock(s, pos);
1203                 }
1204         }
1205         if (opt_j >= 0)
1206                 return;
1207         for (hash = 0; hash < HASHSIZE; hash++) {
1208                 for (s = sockhash[hash]; s != NULL; s = s->next) {
1209                         if (s->shown)
1210                                 continue;
1211                         if (!check_ports(s))
1212                                 continue;
1213                         pos = 0;
1214                         pos += xprintf("%-8s %-10s %-5s %-2s ",
1215                             "?", "?", "?", "?");
1216                         displaysock(s, pos);
1217                 }
1218         }
1219 }
1220
1221 static int set_default_protos(void)
1222 {
1223         struct protoent *prot;
1224         const char *pname;
1225         size_t pindex;
1226
1227         init_protos(default_numprotos);
1228
1229         for (pindex = 0; pindex < default_numprotos; pindex++) {
1230                 pname = default_protos[pindex];
1231                 prot = getprotobyname(pname);
1232                 if (prot == NULL)
1233                         err(1, "getprotobyname: %s", pname);
1234                 protos[pindex] = prot->p_proto;
1235         }
1236         numprotos = pindex;
1237         return (pindex);
1238 }
1239
1240 static void
1241 usage(void)
1242 {
1243         fprintf(stderr,
1244             "usage: sockstat [-46cLlSsUuvw] [-j jid] [-p ports] [-P protocols]\n");
1245         exit(1);
1246 }
1247
1248 int
1249 main(int argc, char *argv[])
1250 {
1251         int protos_defined = -1;
1252         int o, i;
1253
1254         opt_j = -1;
1255         while ((o = getopt(argc, argv, "46cj:Llp:P:qSsUuvw")) != -1)
1256                 switch (o) {
1257                 case '4':
1258                         opt_4 = 1;
1259                         break;
1260                 case '6':
1261                         opt_6 = 1;
1262                         break;
1263                 case 'c':
1264                         opt_c = 1;
1265                         break;
1266                 case 'j':
1267                         opt_j = jail_getid(optarg);
1268                         if (opt_j < 0)
1269                                 errx(1, "%s", jail_errmsg);
1270                         break;
1271                 case 'L':
1272                         opt_L = 1;
1273                         break;
1274                 case 'l':
1275                         opt_l = 1;
1276                         break;
1277                 case 'p':
1278                         parse_ports(optarg);
1279                         break;
1280                 case 'P':
1281                         protos_defined = parse_protos(optarg);
1282                         break;
1283                 case 'q':
1284                         opt_q = 1;
1285                         break;
1286                 case 'S':
1287                         opt_S = 1;
1288                         break;
1289                 case 's':
1290                         opt_s = 1;
1291                         break;
1292                 case 'U':
1293                         opt_U = 1;
1294                         break;
1295                 case 'u':
1296                         opt_u = 1;
1297                         break;
1298                 case 'v':
1299                         ++opt_v;
1300                         break;
1301                 case 'w':
1302                         opt_w = 1;
1303                         break;
1304                 default:
1305                         usage();
1306                 }
1307
1308         argc -= optind;
1309         argv += optind;
1310
1311         if (argc > 0)
1312                 usage();
1313
1314         if ((!opt_4 && !opt_6) && protos_defined != -1)
1315                 opt_4 = opt_6 = 1;
1316         if (!opt_4 && !opt_6 && !opt_u)
1317                 opt_4 = opt_6 = opt_u = 1;
1318         if ((opt_4 || opt_6) && protos_defined == -1)
1319                 protos_defined = set_default_protos();
1320         if (!opt_c && !opt_l)
1321                 opt_c = opt_l = 1;
1322
1323         if (opt_4 || opt_6) {
1324                 for (i = 0; i < protos_defined; i++)
1325                         if (protos[i] == IPPROTO_SCTP)
1326                                 gather_sctp();
1327                         else
1328                                 gather_inet(protos[i]);
1329         }
1330
1331         if (opt_u || (protos_defined == -1 && !opt_4 && !opt_6)) {
1332                 gather_unix(SOCK_STREAM);
1333                 gather_unix(SOCK_DGRAM);
1334                 gather_unix(SOCK_SEQPACKET);
1335         }
1336         getfiles();
1337         display();
1338         exit(0);
1339 }