mdw@git.distorted.org.uk Git - fwd/blob - socket.c

   1 /* -*-c-*-
   2  *
   3  * $Id: socket.c,v 1.9 2002/02/23 00:08:00 mdw Exp $
   4  *
   5  * Socket source and target definitions
   6  *
   7  * (c) 1999 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the `fw' port forwarder.
  13  *
  14  * `fw' is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * `fw' is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with `fw'; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: socket.c,v $
  32  * Revision 1.9  2002/02/23 00:08:00  mdw
  33  * Fix stupid bugs from the listen(2) change.
  34  *
  35  * Revision 1.8  2002/02/22 23:44:44  mdw
  36  * Call @xfree@ rather than @free@.  Add option to change the listen(2)
  37  * parameter.
  38  *
  39  * Revision 1.7  2001/06/22 19:37:00  mdw
  40  * New @conn_init@ interface.
  41  *
  42  * Revision 1.6  2001/02/03 20:30:03  mdw
  43  * Support re-reading config files on SIGHUP.
  44  *
  45  * Revision 1.5  2000/03/23 23:20:42  mdw
  46  * Remove listener even if connection option isn't SOCKOPT_LIMITED.
  47  *
  48  * Revision 1.4  1999/12/22 15:44:25  mdw
  49  * Fix log message.
  50  *
  51  * Revision 1.3  1999/10/22 22:48:36  mdw
  52  * New connection options: unlimited concurrent connections, and one-shot
  53  * listening sockets.
  54  *
  55  * Revision 1.2  1999/07/27 18:30:53  mdw
  56  * Various minor portability fixes.
  57  *
  58  * Revision 1.1  1999/07/26 23:33:32  mdw
  59  * New sources and targets.
  60  *
  61  */
  62
  63 /*----- Header files ------------------------------------------------------*/
  64
  65 #include "config.h"
  66
  67 #include <ctype.h>
  68 #include <errno.h>
  69 #include <limits.h>
  70 #include <stdio.h>
  71 #include <stdlib.h>
  72 #include <string.h>
  73
  74 #include <sys/types.h>
  75 #include <unistd.h>
  76
  77 #include <sys/socket.h>
  78 #include <netinet/in.h>
  79 #include <arpa/inet.h>
  80 #include <netdb.h>
  81
  82 #include <mLib/alloc.h>
  83 #include <mLib/conn.h>
  84 #include <mLib/dstr.h>
  85 #include <mLib/fdflags.h>
  86 #include <mLib/sel.h>
  87 #include <mLib/sub.h>
  88
  89 #include "addr.h"
  90 #include "conf.h"
  91 #include "endpt.h"
  92 #include "fw.h"
  93 #include "scan.h"
  94 #include "socket.h"
  95 #include "target.h"
  96
  97 #include "inet.h"
  98 #include "un.h"
  99
 100 /*----- Data structures ---------------------------------------------------*/
 101
 102 /* --- Socket source options --- */
 103
 104 typedef struct ssource_opts {
 105   unsigned opt;
 106   unsigned conn;
 107   unsigned listen;
 108 } ssource_opts;
 109
 110 static ssource_opts ssgo = { 256, 0, 5 };
 111
 112 #define SOCKOPT_LIMIT 0u
 113 #define SOCKOPT_NOLIMIT 1u
 114 #define SOCKOPT_ONESHOT 2u
 115
 116 /* --- Socket source --- */
 117
 118 typedef struct ssource {
 119   source s;
 120   addr *a;
 121   target *t;
 122   addr_opts *ao;
 123   ssource_opts o;
 124   sel_file r;
 125 } ssource;
 126
 127 /* --- Socket target --- */
 128
 129 typedef struct starget {
 130   target t;
 131   addr *a;
 132   addr_opts *ao;
 133 } starget;
 134
 135 /* --- Socket target endpoint --- */
 136
 137 typedef struct stept {
 138   endpt e;
 139   conn c;
 140   char *desc;
 141 } stept;
 142
 143 /* --- Socket source endpoint --- */
 144
 145 typedef struct ssept {
 146   endpt e;
 147   ssource *s;
 148 } ssept;
 149
 150 /*----- Protocol table ----------------------------------------------------*/
 151
 152 static addr_ops *addrs[] = { &inet_ops, &un_ops, 0 };
 153
 154 /*----- Other persistent variables ----------------------------------------*/
 155
 156 static addr_opts gao = { 0 };
 157
 158 /*----- Parsing address types ---------------------------------------------*/
 159
 160 /* --- @getaddrtype@ --- *
 161  *
 162  * Arguments:   @scanner *sc@ = pointer to scanner (for error reporting)
 163  *              @const char *p@ = pointer to protocol name
 164  *              @int abbrev@ = nonzero to allow abbreviations
 165  *
 166  * Returns:     Pointer to address operations table or null.
 167  *
 168  * Use:         Looks up a protocol name.  Handy when parsing addresses and
 169  *              other bits of configuration.  Returns null if no matching
 170  *              address was found.
 171  */
 172
 173 static addr_ops *getaddrtype(scanner *sc, const char *p, int abbrev)
 174 {
 175   addr_ops **ops;
 176   addr_ops *chosen = 0;
 177   size_t sz = strlen(p);
 178
 179   for (ops = addrs; *ops; ops++) {
 180     if (strncmp((*ops)->name, p, sz) == 0) {
 181       if ((*ops)->name[sz] == 0)
 182         return (*ops);
 183       else if (chosen && abbrev)
 184         error(sc, "ambiguous socket address type `%s'", p);
 185       chosen = *ops;
 186     }
 187   }
 188   if (!abbrev)
 189     return (0);
 190   return (chosen);
 191 }
 192
 193 /* --- @getaddr@ --- *
 194  *
 195  * Arguments:   @scanner *sc@ = pointer to scanner to read from
 196  *              @unsigned type@ = address type (@ADDR_SRC@ or @ADDR_DEST@)
 197  *
 198  * Returns:     Pointer to an address successfully read.
 199  *
 200  * Use:         Reads an optionally qualified address.
 201  */
 202
 203 static addr *getaddr(scanner *sc, unsigned type)
 204 {
 205   addr_ops *ops = 0;
 206   int abbrev = 0;
 207
 208   if (sc->t == ':') {
 209     token(sc);
 210     abbrev = 1;
 211   }
 212   if (sc->t == CTOK_WORD)
 213     ops = getaddrtype(sc, sc->d.buf, abbrev);
 214   if (ops)
 215     token(sc);
 216   else if (abbrev)
 217     error(sc, "unknown socket address type `%s'", sc->d.buf);
 218   else
 219     ops = &inet_ops;
 220   if (sc->t == ':')
 221     token(sc);
 222
 223   return (ops->read(sc, type));
 224 }
 225
 226 /*----- Socket endpoints --------------------------------------------------*/
 227
 228 /* --- @wclose@ --- */
 229
 230 static void sept_wclose(endpt *e)
 231 {
 232   shutdown(e->out->fd, 1);
 233 }
 234
 235 /* --- @close@ (source) --- */
 236
 237 static void ss_listen(ssource */*ss*/);
 238
 239 static void ssept_close(endpt *e)
 240 {
 241   ssept *ee = (ssept *)e;
 242
 243   if (ee->s->o.opt == SOCKOPT_LIMIT) {
 244     ee->s->o.conn++;
 245     if (ee->s->o.conn == 1)
 246       ss_listen(ee->s);
 247   }
 248   REFFD_DEC(ee->e.in);
 249   REFFD_DEC(ee->e.out);
 250   fw_dec();
 251   DESTROY(ee);
 252 }
 253
 254 /* --- @close@ (target) --- */
 255
 256 static void stept_close(endpt *e)
 257 {
 258   stept *ee = (stept *)e;
 259
 260   if (ee->e.f & EPF_PENDING)
 261     conn_kill(&ee->c);
 262   else {
 263     REFFD_DEC(ee->e.in);
 264     REFFD_DEC(ee->e.out);
 265   }
 266
 267   xfree(ee->desc);
 268   fw_dec();
 269   DESTROY(ee);
 270 }
 271
 272 /* --- @stept_go@ --- *
 273  *
 274  * Arguments:   @int fd@ = file descriptor now ready for use
 275  *              @void *p@ = pointer to an endpoint structure
 276  *
 277  * Returns:     ---
 278  *
 279  * Use:         Handles successful connection of the target endpoint.
 280  */
 281
 282 static void stept_go(int fd, void *p)
 283 {
 284   stept *e = p;
 285
 286   if (fd == -1) {
 287     fw_log(-1, "[%s] connection failed: %s", e->desc, strerror(errno));
 288     endpt_kill(&e->e);
 289   } else {
 290     reffd *r = reffd_init(fd);
 291     REFFD_INC(r);
 292     e->e.in = e->e.out = r;
 293     e->e.f &= ~EPF_PENDING;
 294     if (e->e.other)
 295       endpt_join(&e->e, e->e.other);
 296   }
 297 }
 298
 299 /* --- Socket endpoint definition --- */
 300
 301 static endpt_ops ssept_ops = {
 302   0, 0, sept_wclose, ssept_close
 303 };
 304
 305 static endpt_ops stept_ops = {
 306   0, 0, sept_wclose, stept_close
 307 };
 308
 309 /*----- Source definition -------------------------------------------------*/
 310
 311 /* --- @option@ --- */
 312
 313 static int ssource_option(source *s, scanner *sc)
 314 {
 315   ssource *ss = (ssource *)s;
 316   ssource_opts *sso = ss ? &ss->o : &ssgo;
 317
 318   CONF_BEGIN(sc, "socket", "socket")
 319
 320   /* --- Make sure the next token is a word --- */
 321
 322   if (sc->t != CTOK_WORD)
 323     error(sc, "parse error, option keyword expected");
 324
 325   /* --- Handle options at this level --- */
 326
 327   if (strcmp(sc->d.buf, "conn") == 0) {
 328     token(sc);
 329     if (sc->t == '=')
 330       token(sc);
 331     if (sc->t != CTOK_WORD)
 332       error(sc, "parse error, expected `unlimited', `one-shot' or number");
 333     if (isdigit((unsigned char)sc->d.buf[0])) {
 334       sso->conn = atoi(sc->d.buf);
 335       if (sso->conn == 0)
 336         error(sc, "argument of `conn' must be positive");
 337       sso->opt = SOCKOPT_LIMIT;
 338       token(sc);
 339     } else {
 340       sso->conn = 0;
 341       sso->opt = 1 + (1 & conf_enum(sc,
 342                                     "unlimited,one-shot,infinite",
 343                                     ENUM_ABBREV, "`conn' option"));
 344     }
 345     CONF_ACCEPT;
 346   }
 347
 348   if (strcmp(sc->d.buf, "listen") == 0) {
 349     token(sc);
 350     if (sc->t == '=')
 351       token(sc);
 352     if (sc->t != CTOK_WORD || !isdigit((unsigned char)sc->d.buf[0]))
 353       error(sc, "parse error, expected number");
 354     sso->listen = atoi(sc->d.buf);
 355     if (sso->listen == 0)
 356       error(sc, "argument of `listen' must be positive");
 357     token(sc);
 358     CONF_ACCEPT;
 359   }
 360
 361   if (strcmp(sc->d.buf, "logging") == 0 ||
 362       strcmp(sc->d.buf, "log") == 0) {
 363     addr_opts *ao = ss ? ss->ao : &gao;
 364     token(sc);
 365     if (sc->t == '=')
 366       token(sc);
 367     if (conf_enum(sc, "no,yes", ENUM_ABBREV, "logging status"))
 368       ao->f &= ~ADDRF_NOLOG;
 369     else
 370       ao->f |= ADDRF_NOLOG;
 371     CONF_ACCEPT;
 372   }
 373
 374   /* --- Pass the option around the various address types --- */
 375
 376   if (ss) {
 377     if (ss->a->ops->option && ss->a->ops->option(sc, ss ? ss->ao : 0))
 378       CONF_ACCEPT;
 379   } else {
 380     addr_ops **a;
 381     for (a = addrs; *a; a++) {
 382       if ((*a)->option && (*a)->option(sc, 0))
 383         CONF_ACCEPT;
 384     }
 385   }
 386
 387   /* --- Nobody understood the option --- */
 388
 389   CONF_END;
 390 }
 391
 392 /* --- @read@ --- */
 393
 394 static source *ssource_read(scanner *sc)
 395 {
 396   ssource *ss;
 397
 398   (void)(conf_prefix(sc, "socket") || conf_prefix(sc, "sk"));
 399   ss = CREATE(ssource);
 400   ss->s.ops = &ssource_ops;
 401   ss->s.desc = 0;
 402   ss->t = 0;
 403   ss->a = getaddr(sc, ADDR_SRC);
 404   if (ss->a->ops->initopts)
 405     ss->ao = ss->a->ops->initopts();
 406   else
 407     ss->ao = CREATE(addr_opts);
 408   *ss->ao = gao;
 409   ss->o = ssgo;
 410   return (&ss->s);
 411 }
 412
 413 /* --- @ss_accept@ --- *
 414  *
 415  * Arguments:   @int fd@ = file descriptor to accept from
 416  *              @unsigned mode@ = what's ready with the descriptor
 417  *              @void *p@ = pointer to the source definition
 418  *
 419  * Returns:     ---
 420  *
 421  * Use:         Accepts an incoming connection and attaches it to a target
 422  *              endpoint.
 423  */
 424
 425 static void ssource_destroy(source */*s*/);
 426
 427 static void ss_accept(int fd, unsigned mode, void *p)
 428 {
 429   ssource *ss = p;
 430   ssept *e;
 431   endpt *ee;
 432   reffd *r;
 433
 434   /* --- Make the file descriptor --- */
 435
 436   {
 437     int opt = 1;
 438     if ((r = ss->a->ops->accept(fd, ss->ao, ss->s.desc)) == 0)
 439       return;
 440     setsockopt(r->fd, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt));
 441     fdflags(r->fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
 442   }
 443
 444   /* --- Make an endpoint --- */
 445
 446   e = CREATE(ssept);
 447   e->e.ops = &ssept_ops;
 448   e->e.other = 0;
 449   e->e.f = EPF_FILE;
 450   e->e.t = 0;
 451   e->e.in = e->e.out = r;
 452   e->s = ss;
 453   REFFD_INC(r);
 454
 455   /* --- Obtain the target endpoint and let rip --- */
 456
 457   if ((ee = ss->t->ops->create(ss->t, ss->s.desc)) == 0) {
 458     REFFD_DEC(r);
 459     REFFD_DEC(r);
 460     DESTROY(e);
 461     return;
 462   }
 463   fw_inc();
 464
 465   /* --- Remove the listening socket if necessary --- */
 466
 467   switch (ss->o.opt) {
 468     case SOCKOPT_LIMIT:
 469       ss->o.conn--;
 470       if (!ss->o.conn) {
 471         if (!(ss->ao->f & ADDRF_NOLOG))
 472           fw_log(-1, "[%s] maximum connections reached", ss->s.desc);
 473         sel_rmfile(&ss->r);
 474         close(ss->r.fd);
 475         if (ss->a->ops->unbind)
 476           ss->a->ops->unbind(ss->a);
 477       }
 478       break;
 479     case SOCKOPT_NOLIMIT:
 480       break;
 481     case SOCKOPT_ONESHOT:
 482       sel_rmfile(&ss->r);
 483       close(ss->r.fd);
 484       if (ss->a->ops->unbind)
 485         ss->a->ops->unbind(ss->a);
 486       ssource_destroy(&ss->s);
 487       break;
 488   }
 489
 490   /* --- Let everything else happen --- */
 491
 492   endpt_join(&e->e, ee);
 493 }
 494
 495 /* --- @ss_listen@ --- *
 496  *
 497  * Arguments:   @ssource *ss@ = source to listen on
 498  *
 499  * Returns:     ---
 500  *
 501  * Use:         Sets the socket to listen again, if it stopped for some
 502  *              reason.  This is a copy of the code in the @read@ function,
 503  *              because it has different (wildly different) error handling
 504  *              behaviour.
 505  */
 506
 507 static void ss_listen(ssource *ss)
 508 {
 509   gen_addr *ga = (gen_addr *)ss->a;
 510   int fd;
 511
 512   if (!(ss->ao->f & ADDRF_NOLOG))
 513     fw_log(-1, "[%s] reattaching listener", ss->s.desc);
 514
 515   /* --- Make the socket --- */
 516
 517   if ((fd = socket(ga->a.ops->pf, SOCK_STREAM, 0)) < 0) {
 518     fw_log(-1, "[%s] couldn't create socket: %s",
 519            ss->s.desc, strerror(errno));
 520     goto fail_0;
 521   }
 522
 523   /* --- Set it to allow address reuse --- */
 524
 525   {
 526     int opt = 1;
 527     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
 528     fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
 529   }
 530
 531   /* --- Bind it to the right port --- */
 532
 533   if (bind(fd, &ga->sa, ga->a.sz)) {
 534     fw_log(-1, "[%s] couldn't bind socket: %s", ss->s.desc, strerror(errno));
 535     goto fail_1;
 536   }
 537   if (ga->a.ops->bound)
 538     ga->a.ops->bound(&ga->a, ss->ao);
 539
 540   /* --- Set it to listen for connections --- */
 541
 542   if (listen(fd, ss->o.listen)) {
 543     fw_log(-1, "[%s] couldn't listen on socket: %s",
 544            ss->s.desc, strerror(errno));
 545     goto fail_1;
 546   }
 547
 548   /* --- Set the listener up again --- */
 549
 550   ss->r.fd = fd;
 551   sel_addfile(&ss->r);
 552   return;
 553
 554   /* --- Tidy up if it failed --- *
 555    *
 556    * I'll just remove the entire source.
 557    */
 558
 559 fail_1:
 560   close(fd);
 561 fail_0:
 562   ss->o.conn = 0;
 563   ssource_destroy(&ss->s);
 564 }
 565
 566 /* --- @attach@ --- */
 567
 568 static void ssource_attach(source *s, scanner *sc, target *t)
 569 {
 570   ssource *ss = (ssource *)s;
 571   int fd;
 572
 573   ss->t = t;
 574
 575   /* --- Initialize the description string --- */
 576
 577   {
 578     dstr d = DSTR_INIT;
 579     dstr_puts(&d, "socket.");
 580     ss->a->ops->print(ss->a, ADDR_SRC, &d);
 581     dstr_puts(&d, " -> ");
 582     dstr_puts(&d, ss->t->desc);
 583     ss->s.desc = xstrdup(d.buf);
 584     dstr_destroy(&d);
 585   }
 586
 587   /* --- Initialize the socket for listening --- */
 588
 589   {
 590     gen_addr *ga = (gen_addr *)ss->a;
 591
 592     /* --- Make the socket --- */
 593
 594     if ((fd = socket(ga->a.ops->pf, SOCK_STREAM, 0)) < 0)
 595       error(sc, "couldn't create socket: %s", strerror(errno));
 596
 597     /* --- Set it to allow address reuse --- */
 598
 599     {
 600       int opt = 1;
 601       setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
 602       fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
 603     }
 604
 605     /* --- Bind it to the right port --- */
 606
 607     if (bind(fd, &ga->sa, ga->a.sz))
 608       error(sc, "couldn't bind to %s: %s", ss->s.desc, strerror(errno));
 609     if (ga->a.ops->bound)
 610       ga->a.ops->bound(&ga->a, ss->ao);
 611
 612     /* --- Set it to listen for connections --- */
 613
 614     if (listen(fd, ss->o.listen))
 615       error(sc, "couldn't listen on socket: %s", strerror(errno));
 616   }
 617
 618   /* --- We're ready to go now --- */
 619
 620   sel_initfile(sel, &ss->r, fd, SEL_READ, ss_accept, ss);
 621   sel_addfile(&ss->r);
 622   source_add(&ss->s);
 623   fw_inc();
 624 }
 625
 626 /* --- @destroy@ --- */
 627
 628 static void ssource_destroy(source *s)
 629 {
 630   ssource *ss = (ssource *)s;
 631
 632   if (ss->o.conn || ss->o.opt != SOCKOPT_LIMIT) {
 633     sel_rmfile(&ss->r);
 634     close(ss->r.fd);
 635     if (ss->a->ops->unbind)
 636       ss->a->ops->unbind(ss->a);
 637   }
 638   if (ss->a->ops->freeopts)
 639     ss->a->ops->freeopts(ss->ao);
 640   else
 641     DESTROY(ss->ao);
 642   xfree(ss->s.desc);
 643   ss->a->ops->destroy(ss->a);
 644   ss->t->ops->destroy(ss->t);
 645   source_remove(&ss->s);
 646   DESTROY(ss);
 647   fw_dec();
 648 }
 649
 650 /* --- Source definition block --- */
 651
 652 source_ops ssource_ops = {
 653   "socket",
 654   ssource_option, ssource_read, ssource_attach, ssource_destroy
 655 };
 656
 657 /*----- Target definition -------------------------------------------------*/
 658
 659 /* --- @read@ --- */
 660
 661 static target *starget_read(scanner *sc)
 662 {
 663   starget *st;
 664   dstr d = DSTR_INIT;
 665
 666   (void)(conf_prefix(sc, "socket") || conf_prefix(sc, "sk"));
 667   st = CREATE(starget);
 668   st->t.ops = &starget_ops;
 669   st->a = getaddr(sc, ADDR_DEST);
 670   dstr_puts(&d, "socket.");
 671   st->a->ops->print(st->a, ADDR_DEST, &d);
 672   st->t.desc = xstrdup(d.buf);
 673   dstr_destroy(&d);
 674   return (&st->t);
 675 }
 676
 677 /* --- @create@ --- *
 678  *
 679  * Arguments:   @target *t@ = pointer to target
 680  *              @const char *desc@ = description of connection
 681  *
 682  * Returns:     Pointer to a created endpoint.
 683  *
 684  * Use:         Generates a target endpoint for communication.
 685  */
 686
 687 static endpt *starget_create(target *t, const char *desc)
 688 {
 689   starget *st = (starget *)t;
 690   stept *e = CREATE(stept);
 691   int fd;
 692   gen_addr *ga = (gen_addr *)st->a;
 693   int opt;
 694
 695   if ((fd = socket(st->a->ops->pf, SOCK_STREAM, 0)) < 0)
 696     return (0);
 697   setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt));
 698   fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
 699   e->e.ops = &stept_ops;
 700   e->e.other = 0;
 701   e->e.f = EPF_FILE | EPF_PENDING;
 702   e->e.t = 0;
 703   e->desc = xstrdup(desc);
 704
 705   if (conn_init(&e->c, sel, fd, &ga->sa, ga->a.sz, stept_go, e)) {
 706     fw_log(-1, "[%s] connection failed: %s", e->desc, strerror(errno));
 707     DESTROY(e);
 708     return (0);
 709   }
 710   fw_inc();
 711   return (&e->e);
 712 }
 713
 714 /* --- @destroy@ --- */
 715
 716 static void starget_destroy(target *t)
 717 {
 718   starget *st = (starget *)t;
 719   st->a->ops->destroy(st->a);
 720   xfree(st->t.desc);
 721   DESTROY(st);
 722 }
 723
 724 /* --- Socket target definition block --- */
 725
 726 target_ops starget_ops = {
 727   "socket",
 728   0, starget_read, starget_create, starget_destroy
 729 };
 730
 731 /*----- That's all, folks -------------------------------------------------*/