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 #include <sys/unpcb.h>
  41
  42 #include <net/route.h>
  43
  44 #include <netinet/in.h>
  45 #include <netinet/in_pcb.h>
  46 #include <netinet/sctp.h>
  47 #include <netinet/tcp.h>
  48 #include <netinet/tcp_seq.h>
  49 #include <netinet/tcp_var.h>
  50 #include <arpa/inet.h>
  51
  52 #include <ctype.h>
  53 #include <err.h>
  54 #include <errno.h>
  55 #include <netdb.h>
  56 #include <pwd.h>
  57 #include <stdarg.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <unistd.h>
  62
  63 static int       opt_4;         /* Show IPv4 sockets */
  64 static int       opt_6;         /* Show IPv6 sockets */
  65 static int       opt_c;         /* Show connected sockets */
  66 static int       opt_j;         /* Show specified jail */
  67 static int       opt_L;         /* Don't show IPv4 or IPv6 loopback sockets */
  68 static int       opt_l;         /* Show listening sockets */
  69 static int       opt_u;         /* Show Unix domain sockets */
  70 static int       opt_v;         /* Verbose mode */
  71
  72 /*
  73  * Default protocols to use if no -P was defined.
  74  */
  75 static const char *default_protos[] = {"sctp", "tcp", "udp", "divert" };
  76 static size_t      default_numprotos =
  77     sizeof(default_protos) / sizeof(default_protos[0]);
  78
  79 static int      *protos;        /* protocols to use */
  80 static size_t    numprotos;     /* allocated size of protos[] */
  81
  82 static int      *ports;
  83
  84 #define INT_BIT (sizeof(int)*CHAR_BIT)
  85 #define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
  86 #define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
  87
  88 struct addr {
  89         struct sockaddr_storage address;
  90         struct addr *next;
  91 };
  92
  93 struct sock {
  94         void *socket;
  95         void *pcb;
  96         int shown;
  97         int vflag;
  98         int family;
  99         int proto;
 100         const char *protoname;
 101         struct addr *laddr;
 102         struct addr *faddr;
 103         struct sock *next;
 104 };
 105
 106 #define HASHSIZE 1009
 107 static struct sock *sockhash[HASHSIZE];
 108
 109 static struct xfile *xfiles;
 110 static int nxfiles;
 111
 112 static int
 113 xprintf(const char *fmt, ...)
 114 {
 115         va_list ap;
 116         int len;
 117
 118         va_start(ap, fmt);
 119         len = vprintf(fmt, ap);
 120         va_end(ap);
 121         if (len < 0)
 122                 err(1, "printf()");
 123         return (len);
 124 }
 125
 126
 127 static int
 128 get_proto_type(const char *proto)
 129 {
 130         struct protoent *pent;
 131
 132         if (strlen(proto) == 0)
 133                 return (0);
 134         pent = getprotobyname(proto);
 135         if (pent == NULL) {
 136                 warn("getprotobyname");
 137                 return (-1);
 138         }
 139         return (pent->p_proto);
 140 }
 141
 142
 143 static void init_protos(int num)
 144 {
 145         int proto_count = 0;
 146
 147         if (num > 0) {
 148                 proto_count = num;
 149         } else {
 150                 /* Find the maximum number of possible protocols. */
 151                 while (getprotoent() != NULL)
 152                         proto_count++;
 153                 endprotoent();
 154         }
 155
 156         if ((protos = malloc(sizeof(int) * proto_count)) == NULL)
 157                 err(1, "malloc");
 158         numprotos = proto_count;
 159 }
 160
 161
 162 static int
 163 parse_protos(char *protospec)
 164 {
 165         char *prot;
 166         char *tmp = protospec;
 167         int proto_type, proto_index;
 168
 169         if (protospec == NULL)
 170                 return (-1);
 171
 172         init_protos(0);
 173         proto_index = 0;
 174         while ((prot = strsep(&tmp, ",")) != NULL) {
 175                 if (strlen(prot) == 0)
 176                         continue;
 177                 proto_type = get_proto_type(prot);
 178                 if (proto_type != -1)
 179                         protos[proto_index++] = proto_type;
 180         }
 181         numprotos = proto_index;
 182         return (proto_index);
 183 }
 184
 185
 186 static void
 187 parse_ports(const char *portspec)
 188 {
 189         const char *p, *q;
 190         int port, end;
 191
 192         if (ports == NULL)
 193                 if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
 194                         err(1, "calloc()");
 195         p = portspec;
 196         while (*p != '\0') {
 197                 if (!isdigit(*p))
 198                         errx(1, "syntax error in port range");
 199                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 200                         /* nothing */ ;
 201                 for (port = 0; p < q; ++p)
 202                         port = port * 10 + digittoint(*p);
 203                 if (port < 0 || port > 65535)
 204                         errx(1, "invalid port number");
 205                 SET_PORT(port);
 206                 switch (*p) {
 207                 case '-':
 208                         ++p;
 209                         break;
 210                 case ',':
 211                         ++p;
 212                         /* fall through */
 213                 case '\0':
 214                 default:
 215                         continue;
 216                 }
 217                 for (q = p; *q != '\0' && isdigit(*q); ++q)
 218                         /* nothing */ ;
 219                 for (end = 0; p < q; ++p)
 220                         end = end * 10 + digittoint(*p);
 221                 if (end < port || end > 65535)
 222                         errx(1, "invalid port number");
 223                 while (port++ < end)
 224                         SET_PORT(port);
 225                 if (*p == ',')
 226                         ++p;
 227         }
 228 }
 229
 230 static void
 231 sockaddr(struct sockaddr_storage *sa, int af, void *addr, int port)
 232 {
 233         struct sockaddr_in *sin4;
 234         struct sockaddr_in6 *sin6;
 235
 236         bzero(sa, sizeof *sa);
 237         switch (af) {
 238         case AF_INET:
 239                 sin4 = (struct sockaddr_in *)sa;
 240                 sin4->sin_len = sizeof *sin4;
 241                 sin4->sin_family = af;
 242                 sin4->sin_port = port;
 243                 sin4->sin_addr = *(struct in_addr *)addr;
 244                 break;
 245         case AF_INET6:
 246                 sin6 = (struct sockaddr_in6 *)sa;
 247                 sin6->sin6_len = sizeof *sin6;
 248                 sin6->sin6_family = af;
 249                 sin6->sin6_port = port;
 250                 sin6->sin6_addr = *(struct in6_addr *)addr;
 251                 break;
 252         default:
 253                 abort();
 254         }
 255 }
 256
 257 static void
 258 gather_sctp(void)
 259 {
 260         struct sock *sock;
 261         struct addr *laddr, *prev_laddr, *faddr, *prev_faddr;
 262         struct xsctp_inpcb *xinpcb;
 263         struct xsctp_tcb *xstcb;
 264         struct xsctp_raddr *xraddr;
 265         struct xsctp_laddr *xladdr;
 266         const char *varname;
 267         size_t len, offset;
 268         char *buf;
 269         int hash, vflag;
 270         int no_stcb, local_all_loopback, foreign_all_loopback;
 271
 272         vflag = 0;
 273         if (opt_4)
 274                 vflag |= INP_IPV4;
 275         if (opt_6)
 276                 vflag |= INP_IPV6;
 277
 278         varname = "net.inet.sctp.assoclist";
 279         if (sysctlbyname(varname, 0, &len, 0, 0) < 0) {
 280                 if (errno != ENOENT)
 281                         err(1, "sysctlbyname()");
 282                 return;
 283         }
 284         if ((buf = (char *)malloc(len)) == NULL) {
 285                 err(1, "malloc()");
 286                 return;
 287         }
 288         if (sysctlbyname(varname, buf, &len, 0, 0) < 0) {
 289                 err(1, "sysctlbyname()");
 290                 free(buf);
 291                 return;
 292         }
 293         xinpcb = (struct xsctp_inpcb *)(void *)buf;
 294         offset = sizeof(struct xsctp_inpcb);
 295         while ((offset < len) && (xinpcb->last == 0)) {
 296                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 297                         err(1, "malloc()");
 298                 sock->socket = xinpcb->socket;
 299                 sock->proto = IPPROTO_SCTP;
 300                 sock->protoname = "sctp";
 301                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 302                         sock->family = AF_INET6;
 303                         sock->vflag = INP_IPV6;
 304                 } else {
 305                         sock->family = AF_INET;
 306                         sock->vflag = INP_IPV4;
 307                 }
 308                 prev_laddr = NULL;
 309                 local_all_loopback = 1;
 310                 while (offset < len) {
 311                         xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
 312                         offset += sizeof(struct xsctp_laddr);
 313                         if (xladdr->last == 1)
 314                                 break;
 315                         if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
 316                                 err(1, "malloc()");
 317                         switch (xladdr->address.sa.sa_family) {
 318                         case AF_INET:
 319 #define __IN_IS_ADDR_LOOPBACK(pina) \
 320         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 321                                 if (!__IN_IS_ADDR_LOOPBACK(&xladdr->address.sin.sin_addr))
 322                                         local_all_loopback = 0;
 323 #undef __IN_IS_ADDR_LOOPBACK
 324                                 sockaddr(&laddr->address,
 325                                          AF_INET,
 326                                          &xladdr->address.sin.sin_addr,
 327                                          htons(xinpcb->local_port));
 328                                 break;
 329                         case AF_INET6:
 330                                 if (!IN6_IS_ADDR_LOOPBACK(&xladdr->address.sin6.sin6_addr))
 331                                         local_all_loopback = 0;
 332                                 sockaddr(&laddr->address,
 333                                          AF_INET6,
 334                                          &xladdr->address.sin6.sin6_addr,
 335                                          htons(xinpcb->local_port));
 336                                 break;
 337                         default:
 338                                 errx(1, "adress family %d not supported",
 339                                      xladdr->address.sa.sa_family);
 340                         }
 341                         laddr->next = NULL;
 342                         if (prev_laddr == NULL)
 343                                 sock->laddr = laddr;
 344                         else
 345                                 prev_laddr->next = laddr;
 346                         prev_laddr = laddr;
 347                 }
 348                 if (sock->laddr == NULL) {
 349                         if ((sock->laddr = calloc(1, sizeof(struct addr))) == NULL)
 350                                 err(1, "malloc()");
 351                         sock->laddr->address.ss_family = sock->family;
 352                         if (sock->family == AF_INET)
 353                                 sock->laddr->address.ss_len = sizeof(struct sockaddr_in);
 354                         else
 355                                 sock->laddr->address.ss_len = sizeof(struct sockaddr_in);
 356                         local_all_loopback = 0;
 357                 }
 358                 if ((sock->faddr = calloc(1, sizeof(struct addr))) == NULL)
 359                         err(1, "malloc()");
 360                 sock->faddr->address.ss_family = sock->family;
 361                 if (sock->family == AF_INET)
 362                         sock->faddr->address.ss_len = sizeof(struct sockaddr_in);
 363                 else
 364                         sock->faddr->address.ss_len = sizeof(struct sockaddr_in);
 365                 no_stcb = 1;
 366                 while (offset < len) {
 367                         xstcb = (struct xsctp_tcb *)(void *)(buf + offset);
 368                         offset += sizeof(struct xsctp_tcb);
 369                         if (no_stcb &&
 370                             opt_l &&
 371                             (!opt_L || !local_all_loopback) &&
 372                             ((xinpcb->flags & SCTP_PCB_FLAGS_UDPTYPE) ||
 373                              (xstcb->last == 1))) {
 374                                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 375                                 sock->next = sockhash[hash];
 376                                 sockhash[hash] = sock;
 377                         }
 378                         if (xstcb->last == 1)
 379                                 break;
 380                         no_stcb = 0;
 381                         if (opt_c) {
 382                                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 383                                         err(1, "malloc()");
 384                                 sock->socket = xinpcb->socket;
 385                                 sock->proto = IPPROTO_SCTP;
 386                                 sock->protoname = "sctp";
 387                                 if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
 388                                         sock->family = AF_INET6;
 389                                         sock->vflag = INP_IPV6;
 390                                 } else {
 391                                         sock->family = AF_INET;
 392                                         sock->vflag = INP_IPV4;
 393                                 }
 394                         }
 395                         prev_laddr = NULL;
 396                         local_all_loopback = 1;
 397                         while (offset < len) {
 398                                 xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
 399                                 offset += sizeof(struct xsctp_laddr);
 400                                 if (xladdr->last == 1)
 401                                         break;
 402                                 if (!opt_c)
 403                                         continue;
 404                                 if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
 405                                         err(1, "malloc()");
 406                                 switch (xladdr->address.sa.sa_family) {
 407                                 case AF_INET:
 408 #define __IN_IS_ADDR_LOOPBACK(pina) \
 409         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 410                                         if (!__IN_IS_ADDR_LOOPBACK(&xladdr->address.sin.sin_addr))
 411                                                 local_all_loopback = 0;
 412 #undef __IN_IS_ADDR_LOOPBACK
 413                                         sockaddr(&laddr->address,
 414                                                  AF_INET,
 415                                                  &xladdr->address.sin.sin_addr,
 416                                                  htons(xstcb->local_port));
 417                                         break;
 418                                 case AF_INET6:
 419                                         if (!IN6_IS_ADDR_LOOPBACK(&xladdr->address.sin6.sin6_addr))
 420                                                 local_all_loopback = 0;
 421                                         sockaddr(&laddr->address,
 422                                                  AF_INET6,
 423                                                  &xladdr->address.sin6.sin6_addr,
 424                                                  htons(xstcb->local_port));
 425                                         break;
 426                                 default:
 427                                         errx(1, "adress family %d not supported",
 428                                              xladdr->address.sa.sa_family);
 429                                 }
 430                                 laddr->next = NULL;
 431                                 if (prev_laddr == NULL)
 432                                         sock->laddr = laddr;
 433                                 else
 434                                         prev_laddr->next = laddr;
 435                                 prev_laddr = laddr;
 436                         }
 437                         prev_faddr = NULL;
 438                         foreign_all_loopback = 1;
 439                         while (offset < len) {
 440                                 xraddr = (struct xsctp_raddr *)(void *)(buf + offset);
 441                                 offset += sizeof(struct xsctp_raddr);
 442                                 if (xraddr->last == 1)
 443                                         break;
 444                                 if (!opt_c)
 445                                         continue;
 446                                 if ((faddr = calloc(1, sizeof(struct addr))) == NULL)
 447                                         err(1, "malloc()");
 448                                 switch (xraddr->address.sa.sa_family) {
 449                                 case AF_INET:
 450 #define __IN_IS_ADDR_LOOPBACK(pina) \
 451         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 452                                         if (!__IN_IS_ADDR_LOOPBACK(&xraddr->address.sin.sin_addr))
 453                                                 foreign_all_loopback = 0;
 454 #undef __IN_IS_ADDR_LOOPBACK
 455                                         sockaddr(&faddr->address,
 456                                                  AF_INET,
 457                                                  &xraddr->address.sin.sin_addr,
 458                                                  htons(xstcb->remote_port));
 459                                         break;
 460                                 case AF_INET6:
 461                                         if (!IN6_IS_ADDR_LOOPBACK(&xraddr->address.sin6.sin6_addr))
 462                                                 foreign_all_loopback = 0;
 463                                         sockaddr(&faddr->address,
 464                                                  AF_INET6,
 465                                                  &xraddr->address.sin6.sin6_addr,
 466                                                  htons(xstcb->remote_port));
 467                                         break;
 468                                 default:
 469                                         errx(1, "adress family %d not supported",
 470                                              xraddr->address.sa.sa_family);
 471                                 }
 472                                 faddr->next = NULL;
 473                                 if (prev_faddr == NULL)
 474                                         sock->faddr = faddr;
 475                                 else
 476                                         prev_faddr->next = faddr;
 477                                 prev_faddr = faddr;
 478                         }
 479                         if (opt_c &&
 480                             (!opt_L || !(local_all_loopback || foreign_all_loopback))) {
 481                                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 482                                 sock->next = sockhash[hash];
 483                                 sockhash[hash] = sock;
 484                         }
 485                 }
 486                 xinpcb = (struct xsctp_inpcb *)(void *)(buf + offset);
 487                 offset += sizeof(struct xsctp_inpcb);
 488         }
 489         free(buf);
 490 }
 491
 492 static void
 493 gather_inet(int proto)
 494 {
 495         struct xinpgen *xig, *exig;
 496         struct xinpcb *xip;
 497         struct xtcpcb *xtp;
 498         struct inpcb *inp;
 499         struct xsocket *so;
 500         struct sock *sock;
 501         struct addr *laddr, *faddr;
 502         const char *varname, *protoname;
 503         size_t len, bufsize;
 504         void *buf;
 505         int hash, retry, vflag;
 506
 507         vflag = 0;
 508         if (opt_4)
 509                 vflag |= INP_IPV4;
 510         if (opt_6)
 511                 vflag |= INP_IPV6;
 512
 513         switch (proto) {
 514         case IPPROTO_TCP:
 515                 varname = "net.inet.tcp.pcblist";
 516                 protoname = "tcp";
 517                 break;
 518         case IPPROTO_UDP:
 519                 varname = "net.inet.udp.pcblist";
 520                 protoname = "udp";
 521                 break;
 522         case IPPROTO_DIVERT:
 523                 varname = "net.inet.divert.pcblist";
 524                 protoname = "div";
 525                 break;
 526         default:
 527                 errx(1, "protocol %d not supported", proto);
 528         }
 529
 530         buf = NULL;
 531         bufsize = 8192;
 532         retry = 5;
 533         do {
 534                 for (;;) {
 535                         if ((buf = realloc(buf, bufsize)) == NULL)
 536                                 err(1, "realloc()");
 537                         len = bufsize;
 538                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 539                                 break;
 540                         if (errno == ENOENT)
 541                                 goto out;
 542                         if (errno != ENOMEM || len != bufsize)
 543                                 err(1, "sysctlbyname()");
 544                         bufsize *= 2;
 545                 }
 546                 xig = (struct xinpgen *)buf;
 547                 exig = (struct xinpgen *)(void *)
 548                     ((char *)buf + len - sizeof *exig);
 549                 if (xig->xig_len != sizeof *xig ||
 550                     exig->xig_len != sizeof *exig)
 551                         errx(1, "struct xinpgen size mismatch");
 552         } while (xig->xig_gen != exig->xig_gen && retry--);
 553
 554         if (xig->xig_gen != exig->xig_gen && opt_v)
 555                 warnx("warning: data may be inconsistent");
 556
 557         for (;;) {
 558                 xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
 559                 if (xig >= exig)
 560                         break;
 561                 switch (proto) {
 562                 case IPPROTO_TCP:
 563                         xtp = (struct xtcpcb *)xig;
 564                         if (xtp->xt_len != sizeof *xtp) {
 565                                 warnx("struct xtcpcb size mismatch");
 566                                 goto out;
 567                         }
 568                         inp = &xtp->xt_inp;
 569                         so = &xtp->xt_socket;
 570                         protoname = xtp->xt_tp.t_flags & TF_TOE ? "toe" : "tcp";
 571                         break;
 572                 case IPPROTO_UDP:
 573                 case IPPROTO_DIVERT:
 574                         xip = (struct xinpcb *)xig;
 575                         if (xip->xi_len != sizeof *xip) {
 576                                 warnx("struct xinpcb size mismatch");
 577                                 goto out;
 578                         }
 579                         inp = &xip->xi_inp;
 580                         so = &xip->xi_socket;
 581                         break;
 582                 default:
 583                         errx(1, "protocol %d not supported", proto);
 584                 }
 585                 if ((inp->inp_vflag & vflag) == 0)
 586                         continue;
 587                 if (inp->inp_vflag & INP_IPV4) {
 588                         if ((inp->inp_fport == 0 && !opt_l) ||
 589                             (inp->inp_fport != 0 && !opt_c))
 590                                 continue;
 591 #define __IN_IS_ADDR_LOOPBACK(pina) \
 592         ((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
 593                         if (opt_L &&
 594                             (__IN_IS_ADDR_LOOPBACK(&inp->inp_faddr) ||
 595                              __IN_IS_ADDR_LOOPBACK(&inp->inp_laddr)))
 596                                 continue;
 597 #undef __IN_IS_ADDR_LOOPBACK
 598                 } else if (inp->inp_vflag & INP_IPV6) {
 599                         if ((inp->inp_fport == 0 && !opt_l) ||
 600                             (inp->inp_fport != 0 && !opt_c))
 601                                 continue;
 602                         if (opt_L &&
 603                             (IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr) ||
 604                              IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr)))
 605                                 continue;
 606                 } else {
 607                         if (opt_v)
 608                                 warnx("invalid vflag 0x%x", inp->inp_vflag);
 609                         continue;
 610                 }
 611                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 612                         err(1, "malloc()");
 613                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 614                         err(1, "malloc()");
 615                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 616                         err(1, "malloc()");
 617                 sock->socket = so->xso_so;
 618                 sock->proto = proto;
 619                 if (inp->inp_vflag & INP_IPV4) {
 620                         sock->family = AF_INET;
 621                         sockaddr(&laddr->address, sock->family,
 622                             &inp->inp_laddr, inp->inp_lport);
 623                         sockaddr(&faddr->address, sock->family,
 624                             &inp->inp_faddr, inp->inp_fport);
 625                 } else if (inp->inp_vflag & INP_IPV6) {
 626                         sock->family = AF_INET6;
 627                         sockaddr(&laddr->address, sock->family,
 628                             &inp->in6p_laddr, inp->inp_lport);
 629                         sockaddr(&faddr->address, sock->family,
 630                             &inp->in6p_faddr, inp->inp_fport);
 631                 }
 632                 laddr->next = NULL;
 633                 faddr->next = NULL;
 634                 sock->laddr = laddr;
 635                 sock->faddr = faddr;
 636                 sock->vflag = inp->inp_vflag;
 637                 sock->protoname = protoname;
 638                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 639                 sock->next = sockhash[hash];
 640                 sockhash[hash] = sock;
 641         }
 642 out:
 643         free(buf);
 644 }
 645
 646 static void
 647 gather_unix(int proto)
 648 {
 649         struct xunpgen *xug, *exug;
 650         struct xunpcb *xup;
 651         struct sock *sock;
 652         struct addr *laddr, *faddr;
 653         const char *varname, *protoname;
 654         size_t len, bufsize;
 655         void *buf;
 656         int hash, retry;
 657
 658         switch (proto) {
 659         case SOCK_STREAM:
 660                 varname = "net.local.stream.pcblist";
 661                 protoname = "stream";
 662                 break;
 663         case SOCK_DGRAM:
 664                 varname = "net.local.dgram.pcblist";
 665                 protoname = "dgram";
 666                 break;
 667         default:
 668                 abort();
 669         }
 670         buf = NULL;
 671         bufsize = 8192;
 672         retry = 5;
 673         do {
 674                 for (;;) {
 675                         if ((buf = realloc(buf, bufsize)) == NULL)
 676                                 err(1, "realloc()");
 677                         len = bufsize;
 678                         if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
 679                                 break;
 680                         if (errno != ENOMEM || len != bufsize)
 681                                 err(1, "sysctlbyname()");
 682                         bufsize *= 2;
 683                 }
 684                 xug = (struct xunpgen *)buf;
 685                 exug = (struct xunpgen *)(void *)
 686                     ((char *)buf + len - sizeof *exug);
 687                 if (xug->xug_len != sizeof *xug ||
 688                     exug->xug_len != sizeof *exug) {
 689                         warnx("struct xinpgen size mismatch");
 690                         goto out;
 691                 }
 692         } while (xug->xug_gen != exug->xug_gen && retry--);
 693
 694         if (xug->xug_gen != exug->xug_gen && opt_v)
 695                 warnx("warning: data may be inconsistent");
 696
 697         for (;;) {
 698                 xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
 699                 if (xug >= exug)
 700                         break;
 701                 xup = (struct xunpcb *)xug;
 702                 if (xup->xu_len != sizeof *xup) {
 703                         warnx("struct xunpcb size mismatch");
 704                         goto out;
 705                 }
 706                 if ((xup->xu_unp.unp_conn == NULL && !opt_l) ||
 707                     (xup->xu_unp.unp_conn != NULL && !opt_c))
 708                         continue;
 709                 if ((sock = calloc(1, sizeof *sock)) == NULL)
 710                         err(1, "malloc()");
 711                 if ((laddr = calloc(1, sizeof *laddr)) == NULL)
 712                         err(1, "malloc()");
 713                 if ((faddr = calloc(1, sizeof *faddr)) == NULL)
 714                         err(1, "malloc()");
 715                 sock->socket = xup->xu_socket.xso_so;
 716                 sock->pcb = xup->xu_unpp;
 717                 sock->proto = proto;
 718                 sock->family = AF_UNIX;
 719                 sock->protoname = protoname;
 720                 if (xup->xu_unp.unp_addr != NULL)
 721                         laddr->address =
 722                             *(struct sockaddr_storage *)(void *)&xup->xu_addr;
 723                 else if (xup->xu_unp.unp_conn != NULL)
 724                         *(void **)&(faddr->address) = xup->xu_unp.unp_conn;
 725                 laddr->next = NULL;
 726                 faddr->next = NULL;
 727                 sock->laddr = laddr;
 728                 sock->faddr = faddr;
 729                 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
 730                 sock->next = sockhash[hash];
 731                 sockhash[hash] = sock;
 732         }
 733 out:
 734         free(buf);
 735 }
 736
 737 static void
 738 getfiles(void)
 739 {
 740         size_t len, olen;
 741
 742         olen = len = sizeof *xfiles;
 743         if ((xfiles = malloc(len)) == NULL)
 744                 err(1, "malloc()");
 745         while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
 746                 if (errno != ENOMEM || len != olen)
 747                         err(1, "sysctlbyname()");
 748                 olen = len *= 2;
 749                 if ((xfiles = realloc(xfiles, len)) == NULL)
 750                         err(1, "realloc()");
 751         }
 752         if (len > 0 && xfiles->xf_size != sizeof *xfiles)
 753                 errx(1, "struct xfile size mismatch");
 754         nxfiles = len / sizeof *xfiles;
 755 }
 756
 757 static int
 758 printaddr(struct sockaddr_storage *ss)
 759 {
 760         char addrstr[INET6_ADDRSTRLEN] = { '\0', '\0' };
 761         struct sockaddr_un *sun;
 762         void *addr = NULL; /* Keep compiler happy. */
 763         int off, port = 0;
 764
 765         switch (ss->ss_family) {
 766         case AF_INET:
 767                 addr = &((struct sockaddr_in *)ss)->sin_addr;
 768                 if (inet_lnaof(*(struct in_addr *)addr) == INADDR_ANY)
 769                         addrstr[0] = '*';
 770                 port = ntohs(((struct sockaddr_in *)ss)->sin_port);
 771                 break;
 772         case AF_INET6:
 773                 addr = &((struct sockaddr_in6 *)ss)->sin6_addr;
 774                 if (IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *)addr))
 775                         addrstr[0] = '*';
 776                 port = ntohs(((struct sockaddr_in6 *)ss)->sin6_port);
 777                 break;
 778         case AF_UNIX:
 779                 sun = (struct sockaddr_un *)ss;
 780                 off = (int)((char *)&sun->sun_path - (char *)sun);
 781                 return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
 782         }
 783         if (addrstr[0] == '\0')
 784                 inet_ntop(ss->ss_family, addr, addrstr, sizeof addrstr);
 785         if (port == 0)
 786                 return xprintf("%s:*", addrstr);
 787         else
 788                 return xprintf("%s:%d", addrstr, port);
 789 }
 790
 791 static const char *
 792 getprocname(pid_t pid)
 793 {
 794         static struct kinfo_proc proc;
 795         size_t len;
 796         int mib[4];
 797
 798         mib[0] = CTL_KERN;
 799         mib[1] = KERN_PROC;
 800         mib[2] = KERN_PROC_PID;
 801         mib[3] = (int)pid;
 802         len = sizeof proc;
 803         if (sysctl(mib, 4, &proc, &len, NULL, 0) == -1) {
 804                 /* Do not warn if the process exits before we get its name. */
 805                 if (errno != ESRCH)
 806                         warn("sysctl()");
 807                 return ("??");
 808         }
 809         return (proc.ki_comm);
 810 }
 811
 812 static int
 813 getprocjid(pid_t pid)
 814 {
 815         static struct kinfo_proc proc;
 816         size_t len;
 817         int mib[4];
 818
 819         mib[0] = CTL_KERN;
 820         mib[1] = KERN_PROC;
 821         mib[2] = KERN_PROC_PID;
 822         mib[3] = (int)pid;
 823         len = sizeof proc;
 824         if (sysctl(mib, 4, &proc, &len, NULL, 0) == -1) {
 825                 /* Do not warn if the process exits before we get its jid. */
 826                 if (errno != ESRCH)
 827                         warn("sysctl()");
 828                 return (-1);
 829         }
 830         return (proc.ki_jid);
 831 }
 832
 833 static int
 834 check_ports(struct sock *s)
 835 {
 836         int port;
 837         struct addr *addr;
 838
 839         if (ports == NULL)
 840                 return (1);
 841         if ((s->family != AF_INET) && (s->family != AF_INET6))
 842                 return (1);
 843         for (addr = s->laddr; addr != NULL; addr = addr->next) {
 844                 if (addr->address.ss_family == AF_INET)
 845                         port = ntohs(((struct sockaddr_in *)(&addr->address))->sin_port);
 846                 else
 847                         port = ntohs(((struct sockaddr_in6 *)(&addr->address))->sin6_port);
 848                 if (CHK_PORT(port))
 849                         return (1);
 850         }
 851         for (addr = s->faddr; addr != NULL; addr = addr->next) {
 852                 if (addr->address.ss_family == AF_INET)
 853                         port = ntohs(((struct sockaddr_in *)&(addr->address))->sin_port);
 854                 else
 855                         port = ntohs(((struct sockaddr_in6 *)&(addr->address))->sin6_port);
 856                 if (CHK_PORT(port))
 857                         return (1);
 858         }
 859         return (0);
 860 }
 861
 862 static void
 863 displaysock(struct sock *s, int pos)
 864 {
 865         void *p;
 866         int hash;
 867         struct addr *laddr, *faddr;
 868         struct sock *s_tmp;
 869
 870         while (pos < 29)
 871                 pos += xprintf(" ");
 872         pos += xprintf("%s", s->protoname);
 873         if (s->vflag & INP_IPV4)
 874                 pos += xprintf("4 ");
 875         if (s->vflag & INP_IPV6)
 876                 pos += xprintf("6 ");
 877         laddr = s->laddr;
 878         faddr = s->faddr;
 879         while (laddr != NULL || faddr != NULL) {
 880                 while (pos < 36)
 881                         pos += xprintf(" ");
 882                 switch (s->family) {
 883                 case AF_INET:
 884                 case AF_INET6:
 885                         if (laddr != NULL) {
 886                                 pos += printaddr(&laddr->address);
 887                                 if (s->family == AF_INET6 && pos >= 58)
 888                                         pos += xprintf(" ");
 889                         }
 890                         while (pos < 58)
 891                                 pos += xprintf(" ");
 892                         if (faddr != NULL)
 893                                 pos += printaddr(&faddr->address);
 894                         break;
 895                 case AF_UNIX:
 896                         if ((laddr == NULL) || (faddr == NULL))
 897                                 errx(1, "laddr = %p or faddr = %p is NULL",
 898                                      (void *)laddr, (void *)faddr);
 899                         /* server */
 900                         if (laddr->address.ss_len > 0) {
 901                                 pos += printaddr(&laddr->address);
 902                                 break;
 903                         }
 904                         /* client */
 905                         p = *(void **)&(faddr->address);
 906                         if (p == NULL) {
 907                                 pos += xprintf("(not connected)");
 908                                 break;
 909                         }
 910                         pos += xprintf("-> ");
 911                         for (hash = 0; hash < HASHSIZE; ++hash) {
 912                                 for (s_tmp = sockhash[hash];
 913                                      s_tmp != NULL;
 914                                      s_tmp = s_tmp->next)
 915                                         if (s_tmp->pcb == p)
 916                                                 break;
 917                                 if (s_tmp != NULL)
 918                                         break;
 919                         }
 920                         if (s_tmp == NULL ||
 921                             s_tmp->laddr == NULL ||
 922                             s_tmp->laddr->address.ss_len == 0)
 923                                 pos += xprintf("??");
 924                         else
 925                                 pos += printaddr(&s_tmp->laddr->address);
 926                         break;
 927                 default:
 928                         abort();
 929                 }
 930                 if (laddr != NULL)
 931                         laddr = laddr->next;
 932                 if (faddr != NULL)
 933                         faddr = faddr->next;
 934                 if ((laddr != NULL) || (faddr != NULL)) {
 935                         xprintf("\n");
 936                         pos = 0;
 937                 }
 938         }
 939         xprintf("\n");
 940 }
 941
 942 static void
 943 display(void)
 944 {
 945         struct passwd *pwd;
 946         struct xfile *xf;
 947         struct sock *s;
 948         int hash, n, pos;
 949
 950         printf("%-8s %-10s %-5s %-2s %-6s %-21s %-21s\n",
 951             "USER", "COMMAND", "PID", "FD", "PROTO",
 952             "LOCAL ADDRESS", "FOREIGN ADDRESS");
 953         setpassent(1);
 954         for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
 955                 if (xf->xf_data == NULL)
 956                         continue;
 957                 if (opt_j >= 0 && opt_j != getprocjid(xf->xf_pid))
 958                         continue;
 959                 hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
 960                 for (s = sockhash[hash]; s != NULL; s = s->next) {
 961                         if ((void *)s->socket != xf->xf_data)
 962                                 continue;
 963                         if (!check_ports(s))
 964                                 continue;
 965                         s->shown = 1;
 966                         pos = 0;
 967                         if ((pwd = getpwuid(xf->xf_uid)) == NULL)
 968                                 pos += xprintf("%lu ", (u_long)xf->xf_uid);
 969                         else
 970                                 pos += xprintf("%s ", pwd->pw_name);
 971                         while (pos < 9)
 972                                 pos += xprintf(" ");
 973                         pos += xprintf("%.10s", getprocname(xf->xf_pid));
 974                         while (pos < 20)
 975                                 pos += xprintf(" ");
 976                         pos += xprintf("%lu ", (u_long)xf->xf_pid);
 977                         while (pos < 26)
 978                                 pos += xprintf(" ");
 979                         pos += xprintf("%d ", xf->xf_fd);
 980                         displaysock(s, pos);
 981                 }
 982         }
 983         if (opt_j >= 0)
 984                 return;
 985         for (hash = 0; hash < HASHSIZE; hash++) {
 986                 for (s = sockhash[hash]; s != NULL; s = s->next) {
 987                         if (s->shown)
 988                                 continue;
 989                         if (!check_ports(s))
 990                                 continue;
 991                         pos = 0;
 992                         pos += xprintf("%-8s %-10s %-5s %-2s ",
 993                             "?", "?", "?", "?");
 994                         displaysock(s, pos);
 995                 }
 996         }
 997 }
 998
 999 static int set_default_protos(void)
1000 {
1001         struct protoent *prot;
1002         const char *pname;
1003         size_t pindex;
1004
1005         init_protos(default_numprotos);
1006
1007         for (pindex = 0; pindex < default_numprotos; pindex++) {
1008                 pname = default_protos[pindex];
1009                 prot = getprotobyname(pname);
1010                 if (prot == NULL)
1011                         err(1, "getprotobyname: %s", pname);
1012                 protos[pindex] = prot->p_proto;
1013         }
1014         numprotos = pindex;
1015         return (pindex);
1016 }
1017
1018
1019 static void
1020 usage(void)
1021 {
1022         fprintf(stderr,
1023             "Usage: sockstat [-46cLlu] [-j jid] [-p ports] [-P protocols]\n");
1024         exit(1);
1025 }
1026
1027 int
1028 main(int argc, char *argv[])
1029 {
1030         int protos_defined = -1;
1031         int o, i;
1032
1033         opt_j = -1;
1034         while ((o = getopt(argc, argv, "46cj:Llp:P:uv")) != -1)
1035                 switch (o) {
1036                 case '4':
1037                         opt_4 = 1;
1038                         break;
1039                 case '6':
1040                         opt_6 = 1;
1041                         break;
1042                 case 'c':
1043                         opt_c = 1;
1044                         break;
1045                 case 'j':
1046                         opt_j = atoi(optarg);
1047                         break;
1048                 case 'L':
1049                         opt_L = 1;
1050                         break;
1051                 case 'l':
1052                         opt_l = 1;
1053                         break;
1054                 case 'p':
1055                         parse_ports(optarg);
1056                         break;
1057                 case 'P':
1058                         protos_defined = parse_protos(optarg);
1059                         break;
1060                 case 'u':
1061                         opt_u = 1;
1062                         break;
1063                 case 'v':
1064                         ++opt_v;
1065                         break;
1066                 default:
1067                         usage();
1068                 }
1069
1070         argc -= optind;
1071         argv += optind;
1072
1073         if (argc > 0)
1074                 usage();
1075
1076         if ((!opt_4 && !opt_6) && protos_defined != -1)
1077                 opt_4 = opt_6 = 1;
1078         if (!opt_4 && !opt_6 && !opt_u)
1079                 opt_4 = opt_6 = opt_u = 1;
1080         if ((opt_4 || opt_6) && protos_defined == -1)
1081                 protos_defined = set_default_protos();
1082         if (!opt_c && !opt_l)
1083                 opt_c = opt_l = 1;
1084
1085         if (opt_4 || opt_6) {
1086                 for (i = 0; i < protos_defined; i++)
1087                         if (protos[i] == IPPROTO_SCTP)
1088                                 gather_sctp();
1089                         else
1090                                 gather_inet(protos[i]);
1091         }
1092
1093         if (opt_u || (protos_defined == -1 && !opt_4 && !opt_6)) {
1094                 gather_unix(SOCK_STREAM);
1095                 gather_unix(SOCK_DGRAM);
1096         }
1097         getfiles();
1098         display();
1099         exit(0);
1100 }