networking/netstat.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini netstat implementation(s) for busybox
   4  * based in part on the netstat implementation from net-tools.
   5  *
   6  * Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com>
   7  *
   8  * 2002-04-20
   9  * IPV6 support added by Bart Visscher <magick@linux-fan.com>
  10  *
  11  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  12  */
  13
  14 #include "busybox.h"
  15 #include "inet_common.h"
  16
  17 #define NETSTAT_CONNECTED 0x01
  18 #define NETSTAT_LISTENING 0x02
  19 #define NETSTAT_NUMERIC   0x04
  20 /* Must match getopt32 option string */
  21 #define NETSTAT_TCP       0x10
  22 #define NETSTAT_UDP       0x20
  23 #define NETSTAT_RAW       0x40
  24 #define NETSTAT_UNIX      0x80
  25 #define NETSTAT_ALLPROTO  (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)
  26
  27 static int flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO;
  28
  29 enum {
  30         TCP_ESTABLISHED = 1,
  31         TCP_SYN_SENT,
  32         TCP_SYN_RECV,
  33         TCP_FIN_WAIT1,
  34         TCP_FIN_WAIT2,
  35         TCP_TIME_WAIT,
  36         TCP_CLOSE,
  37         TCP_CLOSE_WAIT,
  38         TCP_LAST_ACK,
  39         TCP_LISTEN,
  40         TCP_CLOSING /* now a valid state */
  41 };
  42
  43 static const char * const tcp_state[] =
  44 {
  45         "",
  46         "ESTABLISHED",
  47         "SYN_SENT",
  48         "SYN_RECV",
  49         "FIN_WAIT1",
  50         "FIN_WAIT2",
  51         "TIME_WAIT",
  52         "CLOSE",
  53         "CLOSE_WAIT",
  54         "LAST_ACK",
  55         "LISTEN",
  56         "CLOSING"
  57 };
  58
  59 typedef enum {
  60         SS_FREE = 0,     /* not allocated                */
  61         SS_UNCONNECTED,  /* unconnected to any socket    */
  62         SS_CONNECTING,   /* in process of connecting     */
  63         SS_CONNECTED,    /* connected to socket          */
  64         SS_DISCONNECTING /* in process of disconnecting  */
  65 } socket_state;
  66
  67 #define SO_ACCEPTCON (1<<16)    /* performed a listen           */
  68 #define SO_WAITDATA  (1<<17)    /* wait data to read            */
  69 #define SO_NOSPACE   (1<<18)    /* no space to write            */
  70
  71 static const char *get_sname(int port, const char *proto, int num)
  72 {
  73         /* hummm, we return static buffer here!! */
  74         const char *str = itoa(ntohs(port));
  75         if (!num) {
  76                 struct servent *se = getservbyport(port, proto);
  77                 if (se)
  78                         str = se->s_name;
  79         }
  80         if (!port) {
  81                 str = "*";
  82         }
  83         return str;
  84 }
  85
  86 static void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, const char *proto, int numeric)
  87 {
  88         const char *port_name;
  89
  90 #if ENABLE_FEATURE_IPV6
  91         if (addr->sa_family == AF_INET6) {
  92                 INET6_rresolve(ip_port, size, (struct sockaddr_in6 *)addr,
  93                         (numeric & NETSTAT_NUMERIC) ? 0x0fff : 0);
  94         } else
  95 #endif
  96         {
  97                 INET_rresolve(ip_port, size, (struct sockaddr_in *)addr,
  98                         0x4000 | ((numeric & NETSTAT_NUMERIC) ? 0x0fff : 0),
  99                         0xffffffff);
 100         }
 101         port_name = get_sname(htons(port), proto, numeric);
 102         if ((strlen(ip_port) + strlen(port_name)) > 22)
 103                 ip_port[22 - strlen(port_name)] = '\0';
 104         ip_port += strlen(ip_port);
 105         strcat(ip_port, ":");
 106         strcat(ip_port, port_name);
 107 }
 108
 109 static void tcp_do_one(int lnr, const char *line)
 110 {
 111         char local_addr[64], rem_addr[64];
 112         const char *state_str;
 113         char more[512];
 114         int num, local_port, rem_port, d, state, timer_run, uid, timeout;
 115 #if ENABLE_FEATURE_IPV6
 116         struct sockaddr_in6 localaddr, remaddr;
 117         char addr6[INET6_ADDRSTRLEN];
 118         struct in6_addr in6;
 119 #else
 120         struct sockaddr_in localaddr, remaddr;
 121 #endif
 122         unsigned long rxq, txq, time_len, retr, inode;
 123
 124         if (lnr == 0)
 125                 return;
 126
 127         more[0] = '\0';
 128         num = sscanf(line,
 129                                  "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
 130                                  &d, local_addr, &local_port,
 131                                  rem_addr, &rem_port, &state,
 132                                  &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
 133
 134         if (strlen(local_addr) > 8) {
 135 #if ENABLE_FEATURE_IPV6
 136                 sscanf(local_addr, "%08X%08X%08X%08X",
 137                            &in6.s6_addr32[0], &in6.s6_addr32[1],
 138                            &in6.s6_addr32[2], &in6.s6_addr32[3]);
 139                 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
 140                 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
 141                 sscanf(rem_addr, "%08X%08X%08X%08X",
 142                            &in6.s6_addr32[0], &in6.s6_addr32[1],
 143                            &in6.s6_addr32[2], &in6.s6_addr32[3]);
 144                 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
 145                 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
 146                 localaddr.sin6_family = AF_INET6;
 147                 remaddr.sin6_family = AF_INET6;
 148 #endif
 149         } else {
 150                 sscanf(local_addr, "%X",
 151                            &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
 152                 sscanf(rem_addr, "%X",
 153                            &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
 154                 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
 155                 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
 156         }
 157
 158         if (num < 10) {
 159                 bb_error_msg("warning, got bogus tcp line");
 160                 return;
 161         }
 162         state_str = tcp_state[state];
 163         if ((rem_port && (flags & NETSTAT_CONNECTED))
 164          || (!rem_port && (flags & NETSTAT_LISTENING))
 165         ) {
 166                 snprint_ip_port(local_addr, sizeof(local_addr),
 167                                                 (struct sockaddr *) &localaddr, local_port,
 168                                                 "tcp", flags & NETSTAT_NUMERIC);
 169
 170                 snprint_ip_port(rem_addr, sizeof(rem_addr),
 171                                                 (struct sockaddr *) &remaddr, rem_port,
 172                                                 "tcp", flags & NETSTAT_NUMERIC);
 173
 174                 printf("tcp   %6ld %6ld %-23s %-23s %-12s\n",
 175                            rxq, txq, local_addr, rem_addr, state_str);
 176         }
 177 }
 178
 179 static void udp_do_one(int lnr, const char *line)
 180 {
 181         char local_addr[64], rem_addr[64];
 182         const char *state_str;
 183         char more[512];
 184         int num, local_port, rem_port, d, state, timer_run, uid, timeout;
 185 #if ENABLE_FEATURE_IPV6
 186         struct sockaddr_in6 localaddr, remaddr;
 187         char addr6[INET6_ADDRSTRLEN];
 188         struct in6_addr in6;
 189 #else
 190         struct sockaddr_in localaddr, remaddr;
 191 #endif
 192         unsigned long rxq, txq, time_len, retr, inode;
 193
 194         if (lnr == 0)
 195                 return;
 196
 197         more[0] = '\0';
 198         num = sscanf(line,
 199                                  "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
 200                                  &d, local_addr, &local_port,
 201                                  rem_addr, &rem_port, &state,
 202                                  &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
 203
 204         if (strlen(local_addr) > 8) {
 205 #if ENABLE_FEATURE_IPV6
 206         /* Demangle what the kernel gives us */
 207                 sscanf(local_addr, "%08X%08X%08X%08X",
 208                            &in6.s6_addr32[0], &in6.s6_addr32[1],
 209                            &in6.s6_addr32[2], &in6.s6_addr32[3]);
 210                 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
 211                 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
 212                 sscanf(rem_addr, "%08X%08X%08X%08X",
 213                            &in6.s6_addr32[0], &in6.s6_addr32[1],
 214                            &in6.s6_addr32[2], &in6.s6_addr32[3]);
 215                 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
 216                 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
 217                 localaddr.sin6_family = AF_INET6;
 218                 remaddr.sin6_family = AF_INET6;
 219 #endif
 220         } else {
 221                 sscanf(local_addr, "%X",
 222                            &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
 223                 sscanf(rem_addr, "%X",
 224                            &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
 225                 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
 226                 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
 227         }
 228
 229         if (num < 10) {
 230                 bb_error_msg("warning, got bogus udp line");
 231                 return;
 232         }
 233         switch (state) {
 234                 case TCP_ESTABLISHED:
 235                         state_str = "ESTABLISHED";
 236                         break;
 237
 238                 case TCP_CLOSE:
 239                         state_str = "";
 240                         break;
 241
 242                 default:
 243                         state_str = "UNKNOWN";
 244                         break;
 245         }
 246
 247 #if ENABLE_FEATURE_IPV6
 248 # define notnull(A) (((A.sin6_family == AF_INET6) &&            \
 249                                          ((A.sin6_addr.s6_addr32[0]) ||            \
 250                                           (A.sin6_addr.s6_addr32[1]) ||            \
 251                                           (A.sin6_addr.s6_addr32[2]) ||            \
 252                                           (A.sin6_addr.s6_addr32[3]))) ||          \
 253                                         ((A.sin6_family == AF_INET) &&             \
 254                                          ((struct sockaddr_in *) &A)->sin_addr.s_addr))
 255 #else
 256 # define notnull(A) (A.sin_addr.s_addr)
 257 #endif
 258         if ((notnull(remaddr) && (flags & NETSTAT_CONNECTED))
 259          || (!notnull(remaddr) && (flags & NETSTAT_LISTENING))
 260         ) {
 261                 snprint_ip_port(local_addr, sizeof(local_addr),
 262                                                 (struct sockaddr *) &localaddr, local_port,
 263                                                 "udp", flags & NETSTAT_NUMERIC);
 264
 265                 snprint_ip_port(rem_addr, sizeof(rem_addr),
 266                                                 (struct sockaddr *) &remaddr, rem_port,
 267                                                 "udp", flags & NETSTAT_NUMERIC);
 268
 269                 printf("udp   %6ld %6ld %-23s %-23s %-12s\n",
 270                            rxq, txq, local_addr, rem_addr, state_str);
 271         }
 272 }
 273
 274 static void raw_do_one(int lnr, const char *line)
 275 {
 276         char local_addr[64], rem_addr[64];
 277         char *state_str, more[512];
 278         int num, local_port, rem_port, d, state, timer_run, uid, timeout;
 279 #if ENABLE_FEATURE_IPV6
 280         struct sockaddr_in6 localaddr, remaddr;
 281         char addr6[INET6_ADDRSTRLEN];
 282         struct in6_addr in6;
 283 #else
 284         struct sockaddr_in localaddr, remaddr;
 285 #endif
 286         unsigned long rxq, txq, time_len, retr, inode;
 287
 288         if (lnr == 0)
 289                 return;
 290
 291         more[0] = '\0';
 292         num = sscanf(line,
 293                                  "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
 294                                  &d, local_addr, &local_port,
 295                                  rem_addr, &rem_port, &state,
 296                                  &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
 297
 298         if (strlen(local_addr) > 8) {
 299 #if ENABLE_FEATURE_IPV6
 300                 sscanf(local_addr, "%08X%08X%08X%08X",
 301                            &in6.s6_addr32[0], &in6.s6_addr32[1],
 302                            &in6.s6_addr32[2], &in6.s6_addr32[3]);
 303                 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
 304                 inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr);
 305                 sscanf(rem_addr, "%08X%08X%08X%08X",
 306                            &in6.s6_addr32[0], &in6.s6_addr32[1],
 307                            &in6.s6_addr32[2], &in6.s6_addr32[3]);
 308                 inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
 309                 inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr);
 310                 localaddr.sin6_family = AF_INET6;
 311                 remaddr.sin6_family = AF_INET6;
 312 #endif
 313         } else {
 314                 sscanf(local_addr, "%X",
 315                            &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
 316                 sscanf(rem_addr, "%X",
 317                            &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
 318                 ((struct sockaddr *) &localaddr)->sa_family = AF_INET;
 319                 ((struct sockaddr *) &remaddr)->sa_family = AF_INET;
 320         }
 321
 322         if (num < 10) {
 323                 bb_error_msg("warning, got bogus raw line");
 324                 return;
 325         }
 326         state_str = itoa(state);
 327
 328 #if ENABLE_FEATURE_IPV6
 329 # define notnull(A) (((A.sin6_family == AF_INET6) &&            \
 330                                          ((A.sin6_addr.s6_addr32[0]) ||            \
 331                                           (A.sin6_addr.s6_addr32[1]) ||            \
 332                                           (A.sin6_addr.s6_addr32[2]) ||            \
 333                                           (A.sin6_addr.s6_addr32[3]))) ||          \
 334                                         ((A.sin6_family == AF_INET) &&             \
 335                                          ((struct sockaddr_in *) &A)->sin_addr.s_addr))
 336 #else
 337 # define notnull(A) (A.sin_addr.s_addr)
 338 #endif
 339         if ((notnull(remaddr) && (flags & NETSTAT_CONNECTED))
 340          || (!notnull(remaddr) && (flags & NETSTAT_LISTENING))
 341         ) {
 342                 snprint_ip_port(local_addr, sizeof(local_addr),
 343                                                 (struct sockaddr *) &localaddr, local_port,
 344                                                 "raw", flags & NETSTAT_NUMERIC);
 345
 346                 snprint_ip_port(rem_addr, sizeof(rem_addr),
 347                                                 (struct sockaddr *) &remaddr, rem_port,
 348                                                 "raw", flags & NETSTAT_NUMERIC);
 349
 350                 printf("raw   %6ld %6ld %-23s %-23s %-12s\n",
 351                            rxq, txq, local_addr, rem_addr, state_str);
 352         }
 353 }
 354
 355 #define HAS_INODE 1
 356
 357 static void unix_do_one(int nr, const char *line)
 358 {
 359         static int has = 0;
 360         char path[PATH_MAX], ss_flags[32];
 361         const char *ss_proto, *ss_state, *ss_type;
 362         int num, state, type, inode;
 363         void *d;
 364         unsigned long refcnt, proto, unix_flags;
 365
 366         if (nr == 0) {
 367                 if (strstr(line, "Inode"))
 368                         has |= HAS_INODE;
 369                 return;
 370         }
 371         path[0] = '\0';
 372         num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s",
 373                                  &d, &refcnt, &proto, &unix_flags, &type, &state, &inode, path);
 374         if (num < 6) {
 375                 bb_error_msg("warning, got bogus unix line");
 376                 return;
 377         }
 378         if (!(has & HAS_INODE))
 379                 snprintf(path,sizeof(path),"%d",inode);
 380
 381         if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
 382                 if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
 383                         if (!(flags & NETSTAT_LISTENING))
 384                                 return;
 385                 } else {
 386                         if (!(flags & NETSTAT_CONNECTED))
 387                                 return;
 388                 }
 389         }
 390
 391         switch (proto) {
 392                 case 0:
 393                         ss_proto = "unix";
 394                         break;
 395
 396                 default:
 397                         ss_proto = "??";
 398         }
 399
 400         switch (type) {
 401                 case SOCK_STREAM:
 402                         ss_type = "STREAM";
 403                         break;
 404
 405                 case SOCK_DGRAM:
 406                         ss_type = "DGRAM";
 407                         break;
 408
 409                 case SOCK_RAW:
 410                         ss_type = "RAW";
 411                         break;
 412
 413                 case SOCK_RDM:
 414                         ss_type = "RDM";
 415                         break;
 416
 417                 case SOCK_SEQPACKET:
 418                         ss_type = "SEQPACKET";
 419                         break;
 420
 421                 default:
 422                         ss_type = "UNKNOWN";
 423         }
 424
 425         switch (state) {
 426                 case SS_FREE:
 427                         ss_state = "FREE";
 428                         break;
 429
 430                 case SS_UNCONNECTED:
 431                         /*
 432                          * Unconnected sockets may be listening
 433                          * for something.
 434                          */
 435                         if (unix_flags & SO_ACCEPTCON) {
 436                                 ss_state = "LISTENING";
 437                         } else {
 438                                 ss_state = "";
 439                         }
 440                         break;
 441
 442                 case SS_CONNECTING:
 443                         ss_state = "CONNECTING";
 444                         break;
 445
 446                 case SS_CONNECTED:
 447                         ss_state = "CONNECTED";
 448                         break;
 449
 450                 case SS_DISCONNECTING:
 451                         ss_state = "DISCONNECTING";
 452                         break;
 453
 454                 default:
 455                         ss_state = "UNKNOWN";
 456         }
 457
 458         strcpy(ss_flags, "[ ");
 459         if (unix_flags & SO_ACCEPTCON)
 460                 strcat(ss_flags, "ACC ");
 461         if (unix_flags & SO_WAITDATA)
 462                 strcat(ss_flags, "W ");
 463         if (unix_flags & SO_NOSPACE)
 464                 strcat(ss_flags, "N ");
 465
 466         strcat(ss_flags, "]");
 467
 468         printf("%-5s %-6ld %-11s %-10s %-13s ",
 469                    ss_proto, refcnt, ss_flags, ss_type, ss_state);
 470         if (has & HAS_INODE)
 471                 printf("%-6d ",inode);
 472         else
 473                 printf("-      ");
 474         puts(path);
 475 }
 476
 477 #define _PATH_PROCNET_UDP "/proc/net/udp"
 478 #define _PATH_PROCNET_UDP6 "/proc/net/udp6"
 479 #define _PATH_PROCNET_TCP "/proc/net/tcp"
 480 #define _PATH_PROCNET_TCP6 "/proc/net/tcp6"
 481 #define _PATH_PROCNET_RAW "/proc/net/raw"
 482 #define _PATH_PROCNET_RAW6 "/proc/net/raw6"
 483 #define _PATH_PROCNET_UNIX "/proc/net/unix"
 484
 485 static void do_info(const char *file, const char *name, void (*proc)(int, const char *))
 486 {
 487         int lnr = 0;
 488         FILE *procinfo;
 489
 490         procinfo = fopen(file, "r");
 491         if (procinfo == NULL) {
 492                 if (errno != ENOENT) {
 493                         bb_perror_msg("%s", file);
 494                 } else {
 495                         bb_error_msg("no support for '%s' on this system", name);
 496                 }
 497                 return;
 498         }
 499         do {
 500                 char *buffer = xmalloc_fgets(procinfo);
 501                 if (buffer) {
 502                         (proc)(lnr++, buffer);
 503                         free(buffer);
 504                 }
 505         } while (!feof(procinfo));
 506         fclose(procinfo);
 507 }
 508
 509 /*
 510  * Our main function.
 511  */
 512
 513 int netstat_main(int argc, char **argv)
 514 {
 515         enum {
 516                 OPT_extended = 0x4,
 517                 OPT_showroute = 0x100,
 518         };
 519         unsigned opt;
 520 #if ENABLE_FEATURE_IPV6
 521         int inet = 1;
 522         int inet6 = 1;
 523 #else
 524         enum { inet = 1, inet6 = 0 };
 525 #endif
 526
 527         /* Option string must match NETSTAT_xxx constants */
 528         opt = getopt32(argc, argv, "laentuwxr");
 529         if (opt & 0x1) { // -l
 530                 flags &= ~NETSTAT_CONNECTED;
 531                 flags |= NETSTAT_LISTENING;
 532         }
 533         if (opt & 0x2) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a
 534         //if (opt & 0x4) // -e
 535         if (opt & 0x8) flags |= NETSTAT_NUMERIC; // -n
 536         //if (opt & 0x10) // -t: NETSTAT_TCP
 537         //if (opt & 0x20) // -u: NETSTAT_UDP
 538         //if (opt & 0x40) // -w: NETSTAT_RAW
 539         //if (opt & 0x80) // -x: NETSTAT_UNIX
 540         if (opt & OPT_showroute) { // -r
 541 #if ENABLE_ROUTE
 542                 bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
 543                 return 0;
 544 #else
 545                 bb_error_msg_and_die("-r (display routing table) is not compiled in");
 546 #endif
 547         }
 548
 549         opt &= NETSTAT_ALLPROTO;
 550         if (opt) {
 551                 flags &= ~NETSTAT_ALLPROTO;
 552                 flags |= opt;
 553         }
 554         if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) {
 555                 printf("Active Internet connections "); /* xxx */
 556
 557                 if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
 558                         printf("(servers and established)");
 559                 else if (flags & NETSTAT_LISTENING)
 560                         printf("(only servers)");
 561                 else
 562                         printf("(w/o servers)");
 563                 printf("\nProto Recv-Q Send-Q Local Address           Foreign Address         State\n");
 564         }
 565         if (inet && flags & NETSTAT_TCP)
 566                 do_info(_PATH_PROCNET_TCP, "AF INET (tcp)", tcp_do_one);
 567 #if ENABLE_FEATURE_IPV6
 568         if (inet6 && flags & NETSTAT_TCP)
 569                 do_info(_PATH_PROCNET_TCP6, "AF INET6 (tcp)", tcp_do_one);
 570 #endif
 571         if (inet && flags & NETSTAT_UDP)
 572                 do_info(_PATH_PROCNET_UDP, "AF INET (udp)", udp_do_one);
 573 #if ENABLE_FEATURE_IPV6
 574         if (inet6 && flags & NETSTAT_UDP)
 575                 do_info(_PATH_PROCNET_UDP6, "AF INET6 (udp)", udp_do_one);
 576 #endif
 577         if (inet && flags & NETSTAT_RAW)
 578                 do_info(_PATH_PROCNET_RAW, "AF INET (raw)", raw_do_one);
 579 #if ENABLE_FEATURE_IPV6
 580         if (inet6 && flags & NETSTAT_RAW)
 581                 do_info(_PATH_PROCNET_RAW6, "AF INET6 (raw)", raw_do_one);
 582 #endif
 583         if (flags & NETSTAT_UNIX) {
 584                 printf("Active UNIX domain sockets ");
 585                 if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
 586                         printf("(servers and established)");
 587                 else if (flags & NETSTAT_LISTENING)
 588                         printf("(only servers)");
 589                 else
 590                         printf("(w/o servers)");
 591                 printf("\nProto RefCnt Flags       Type       State         I-Node Path\n");
 592                 do_info(_PATH_PROCNET_UNIX, "AF UNIX", unix_do_one);
 593         }
 594         return 0;
 595 }