48bb1f76 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: socket.c,v 1.1 1999/07/26 23:33:32 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 1.1 1999/07/26 23:33:32 mdw |
33 | * New sources and targets. |
34 | * |
35 | */ |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
39 | #include "config.h" |
40 | |
41 | #include <ctype.h> |
42 | #include <errno.h> |
43 | #include <stdio.h> |
44 | #include <stdlib.h> |
45 | #include <string.h> |
46 | |
47 | #include <sys/socket.h> |
48 | #include <netinet/in.h> |
49 | #include <arpa/inet.h> |
50 | #include <netdb.h> |
51 | |
52 | #include <mLib/alloc.h> |
53 | #include <mLib/conn.h> |
54 | #include <mLib/dstr.h> |
55 | #include <mLib/fdflags.h> |
56 | #include <mLib/sel.h> |
57 | #include <mLib/sub.h> |
58 | |
59 | #include "addr.h" |
60 | #include "conf.h" |
61 | #include "endpt.h" |
62 | #include "fw.h" |
63 | #include "scan.h" |
64 | #include "socket.h" |
65 | #include "target.h" |
66 | |
67 | #include "inet.h" |
68 | #include "un.h" |
69 | |
70 | /*----- Data structures ---------------------------------------------------*/ |
71 | |
72 | /* --- Socket source options --- */ |
73 | |
74 | typedef struct ssource_opts { |
75 | unsigned conn; |
76 | } ssource_opts; |
77 | |
78 | static ssource_opts ssgo = { 256 }; |
79 | |
80 | /* --- Socket source --- */ |
81 | |
82 | typedef struct ssource { |
83 | source s; |
84 | addr *a; |
85 | target *t; |
86 | addr_opts *ao; |
87 | ssource_opts o; |
88 | sel_file r; |
89 | } ssource; |
90 | |
91 | /* --- Socket target --- */ |
92 | |
93 | typedef struct starget { |
94 | target t; |
95 | addr *a; |
96 | addr_opts *ao; |
97 | } starget; |
98 | |
99 | /* --- Socket target endpoint --- */ |
100 | |
101 | typedef struct stept { |
102 | endpt e; |
103 | conn c; |
104 | const char *desc; |
105 | } stept; |
106 | |
107 | /* --- Socket source endpoint --- */ |
108 | |
109 | typedef struct ssept { |
110 | endpt e; |
111 | ssource *s; |
112 | } ssept; |
113 | |
114 | #define SKF_CONN 16u |
115 | #define SKF_BROKEN 32u |
116 | |
117 | /*----- Protocol table ----------------------------------------------------*/ |
118 | |
119 | static addr_ops *addrs[] = { &inet_ops, &un_ops, 0 }; |
120 | |
121 | /*----- Other persistent variables ----------------------------------------*/ |
122 | |
123 | static addr_opts gao = { 0 }; |
124 | |
125 | /*----- Parsing address types ---------------------------------------------*/ |
126 | |
127 | /* --- @getaddrtype@ --- * |
128 | * |
129 | * Arguments: @scanner *sc@ = pointer to scanner (for error reporting) |
130 | * @const char *p@ = pointer to protocol name |
131 | * @int abbrev@ = nonzero to allow abbreviations |
132 | * |
133 | * Returns: Pointer to address operations table or null. |
134 | * |
135 | * Use: Looks up a protocol name. Handy when parsing addresses and |
136 | * other bits of configuration. Returns null if no matching |
137 | * address was found. |
138 | */ |
139 | |
140 | static addr_ops *getaddrtype(scanner *sc, const char *p, int abbrev) |
141 | { |
142 | addr_ops **ops; |
143 | addr_ops *chosen = 0; |
144 | size_t sz = strlen(p); |
145 | |
146 | for (ops = addrs; *ops; ops++) { |
147 | if (strncmp((*ops)->name, p, sz) == 0) { |
148 | if ((*ops)->name[sz] == 0) |
149 | return (*ops); |
150 | else if (chosen && abbrev) |
151 | error(sc, "ambiguous socket address type `%s'", p); |
152 | chosen = *ops; |
153 | } |
154 | } |
155 | if (!abbrev) |
156 | return (0); |
157 | return (chosen); |
158 | } |
159 | |
160 | /* --- @getaddr@ --- * |
161 | * |
162 | * Arguments: @scanner *sc@ = pointer to scanner to read from |
163 | * @unsigned type@ = address type (@ADDR_SRC@ or @ADDR_DEST@) |
164 | * |
165 | * Returns: Pointer to an address successfully read. |
166 | * |
167 | * Use: Reads an optionally qualified address. |
168 | */ |
169 | |
170 | static addr *getaddr(scanner *sc, unsigned type) |
171 | { |
172 | addr_ops *ops = 0; |
173 | int abbrev = 0; |
174 | |
175 | if (sc->t == ':') { |
176 | token(sc); |
177 | abbrev = 1; |
178 | } |
179 | if (sc->t == CTOK_WORD) |
180 | ops = getaddrtype(sc, sc->d.buf, abbrev); |
181 | if (ops) |
182 | token(sc); |
183 | else if (abbrev) |
184 | error(sc, "unknown socket address type `%s'", sc->d.buf); |
185 | else |
186 | ops = &inet_ops; |
187 | if (sc->t == ':') |
188 | token(sc); |
189 | |
190 | return (ops->read(sc, type)); |
191 | } |
192 | |
193 | /*----- Socket endpoints --------------------------------------------------*/ |
194 | |
195 | /* --- @wclose@ --- */ |
196 | |
197 | static void sept_wclose(endpt *e) |
198 | { |
199 | shutdown(e->out->fd, 1); |
200 | } |
201 | |
202 | /* --- @close@ (source) --- */ |
203 | |
204 | static void ss_listen(ssource */*ss*/); |
205 | |
206 | static void ssept_close(endpt *e) |
207 | { |
208 | ssept *ee = (ssept *)e; |
209 | |
210 | if (!ee->s->o.conn) { |
211 | ee->s->o.conn++; |
212 | ss_listen(ee->s); |
213 | } else |
214 | ee->s->o.conn++; |
215 | REFFD_DEC(ee->e.in); |
216 | REFFD_DEC(ee->e.out); |
217 | fw_dec(); |
218 | DESTROY(ee); |
219 | } |
220 | |
221 | /* --- @close@ (target) --- */ |
222 | |
223 | static void stept_close(endpt *e) |
224 | { |
225 | stept *ee = (stept *)e; |
226 | |
227 | if (ee->e.f & EPF_PENDING) { |
228 | if (ee->e.f & SKF_CONN) |
229 | conn_kill(&ee->c); |
230 | } else { |
231 | REFFD_DEC(ee->e.in); |
232 | REFFD_DEC(ee->e.out); |
233 | } |
234 | |
235 | fw_dec(); |
236 | DESTROY(ee); |
237 | } |
238 | |
239 | /* --- @stept_go@ --- * |
240 | * |
241 | * Arguments: @int fd@ = file descriptor now ready for use |
242 | * @void *p@ = pointer to an endpoint structure |
243 | * |
244 | * Returns: --- |
245 | * |
246 | * Use: Handles successful connection of the target endpoint. |
247 | */ |
248 | |
249 | static void stept_go(int fd, void *p) |
250 | { |
251 | stept *e = p; |
252 | |
253 | /* --- Complicated and subtle --- * |
254 | * |
255 | * This code interacts quite closely with @starget_create@, mainly through |
256 | * flags in the endpoint block. |
257 | * |
258 | * If the connection failed, I log a message (that's easy enough). The |
259 | * behaviour then depends on whether the endpoints have been joined yet. |
260 | * If not, I set @SKF_BROKEN@ and return, so that @starget_create@ can |
261 | * clean up the mess and return an immediate failure. If they have, I kill |
262 | * the connection and everything ought to work. |
263 | * |
264 | * If the connection worked, I clear @EPF_PENDING@ (as expected, because |
265 | * my endpoint is now ready), and @SKF_CONN@ (to let @starget_create@ know |
266 | * that the connection is already going). Then, only if this isn't the |
267 | * first attempt, I rejoin this endpoint to its partner. |
268 | */ |
269 | |
270 | if (fd == -1) { |
271 | fw_log(-1, "[%s] connection failed: %s", e->desc, strerror(errno)); |
272 | e->e.f &= ~SKF_CONN; |
273 | if (e->e.f & EPF_PENDING) |
274 | endpt_kill(&e->e); |
275 | else |
276 | e->e.f |= SKF_BROKEN; |
277 | } else { |
278 | reffd *r = reffd_init(fd); |
279 | REFFD_INC(r); |
280 | e->e.in = e->e.out = r; |
281 | e->e.f &= ~(EPF_PENDING | SKF_CONN); |
282 | if (e->e.other) |
283 | endpt_join(&e->e, e->e.other); |
284 | } |
285 | } |
286 | |
287 | /* --- Socket endpoint definition --- */ |
288 | |
289 | static endpt_ops ssept_ops = { |
290 | 0, sept_wclose, ssept_close |
291 | }; |
292 | |
293 | static endpt_ops stept_ops = { |
294 | 0, sept_wclose, stept_close |
295 | }; |
296 | |
297 | /*----- Source definition -------------------------------------------------*/ |
298 | |
299 | /* --- @option@ --- */ |
300 | |
301 | static int ssource_option(source *s, scanner *sc) |
302 | { |
303 | ssource *ss = (ssource *)s; |
304 | ssource_opts *sso = ss ? &ss->o : &ssgo; |
305 | |
306 | CONF_BEGIN(sc, "socket", "socket") |
307 | |
308 | /* --- Make sure the next token is a word --- */ |
309 | |
310 | if (sc->t != CTOK_WORD) |
311 | error(sc, "parse error, option keyword expected"); |
312 | |
313 | /* --- Handle options at this level --- */ |
314 | |
315 | if (strcmp(sc->d.buf, "conn") == 0) { |
316 | token(sc); |
317 | if (sc->t == '=') |
318 | token(sc); |
319 | if (sc->t != CTOK_WORD || !isdigit((unsigned char)sc->d.buf[0])) |
320 | error(sc, "parse error, argument of `conn' must be a number"); |
321 | sso->conn = atoi(sc->d.buf); |
322 | if (sso->conn == 0) |
323 | error(sc, "argument of `conn' must be positive"); |
324 | token(sc); |
325 | CONF_ACCEPT; |
326 | } |
327 | |
328 | if (strcmp(sc->d.buf, "logging") == 0 || |
329 | strcmp(sc->d.buf, "log") == 0) { |
330 | addr_opts *ao = ss ? ss->ao : &gao; |
331 | token(sc); |
332 | if (sc->t == '=') |
333 | token(sc); |
334 | if (conf_enum(sc, "no,yes", ENUM_ABBREV, "logging status")) |
335 | ao->f &= ~ADDRF_NOLOG; |
336 | else |
337 | ao->f |= ADDRF_NOLOG; |
338 | CONF_ACCEPT; |
339 | } |
340 | |
341 | /* --- Pass the option around the various address types --- */ |
342 | |
343 | if (ss) { |
344 | if (ss->a->ops->option && ss->a->ops->option(sc, ss ? ss->ao : 0)) |
345 | CONF_ACCEPT; |
346 | } else { |
347 | addr_ops **a; |
348 | for (a = addrs; *a; a++) { |
349 | if ((*a)->option && (*a)->option(sc, 0)) |
350 | CONF_ACCEPT; |
351 | } |
352 | } |
353 | |
354 | /* --- Nobody understood the option --- */ |
355 | |
356 | CONF_END; |
357 | } |
358 | |
359 | /* --- @read@ --- */ |
360 | |
361 | static source *ssource_read(scanner *sc) |
362 | { |
363 | ssource *ss; |
364 | |
365 | (void)(conf_prefix(sc, "socket") || conf_prefix(sc, "sk")); |
366 | ss = CREATE(ssource); |
367 | ss->s.ops = &ssource_ops; |
368 | ss->s.desc = 0; |
369 | ss->t = 0; |
370 | ss->a = getaddr(sc, ADDR_SRC); |
371 | if (ss->a->ops->initopts) |
372 | ss->ao = ss->a->ops->initopts(); |
373 | else |
374 | ss->ao = CREATE(addr_opts); |
375 | *ss->ao = gao; |
376 | ss->o = ssgo; |
377 | return (&ss->s); |
378 | } |
379 | |
380 | /* --- @ss_accept@ --- * |
381 | * |
382 | * Arguments: @int fd@ = file descriptor to accept from |
383 | * @unsigned mode@ = what's ready with the descriptor |
384 | * @void *p@ = pointer to the source definition |
385 | * |
386 | * Returns: --- |
387 | * |
388 | * Use: Accepts an incoming connection and attaches it to a target |
389 | * endpoint. |
390 | */ |
391 | |
392 | static void ss_accept(int fd, unsigned mode, void *p) |
393 | { |
394 | ssource *ss = p; |
395 | ssept *e; |
396 | endpt *ee; |
397 | reffd *r; |
398 | |
399 | /* --- Make the file descriptor --- */ |
400 | |
401 | { |
402 | int opt = 1; |
403 | if ((r = ss->a->ops->accept(fd, ss->ao, ss->s.desc)) == 0) |
404 | return; |
405 | setsockopt(r->fd, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt)); |
406 | fdflags(r->fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
407 | } |
408 | |
409 | /* --- Make an endpoint --- */ |
410 | |
411 | e = CREATE(ssept); |
412 | e->e.ops = &ssept_ops; |
413 | e->e.other = 0; |
414 | e->e.f = EPF_FILE; |
415 | e->e.t = 0; |
416 | e->e.in = e->e.out = r; |
417 | e->s = ss; |
418 | REFFD_INC(r); |
419 | |
420 | /* --- Obtain the target endpoint and let rip --- */ |
421 | |
422 | if ((ee = ss->t->ops->create(ss->t, ss->s.desc)) == 0) { |
423 | REFFD_DEC(r); |
424 | REFFD_DEC(r); |
425 | DESTROY(e); |
426 | return; |
427 | } |
428 | |
429 | /* --- Remove the listening socket if necessary --- */ |
430 | |
431 | ss->o.conn--; |
432 | if (!ss->o.conn) { |
433 | fw_log(-1, "[%s] maximum connections reached", ss->s.desc); |
434 | sel_rmfile(&ss->r); |
435 | close(ss->r.fd); |
436 | if (ss->a->ops->unbind) |
437 | ss->a->ops->unbind(ss->a); |
438 | } |
439 | |
440 | /* --- Let everything else happen --- */ |
441 | |
442 | fw_inc(); |
443 | endpt_join(&e->e, ee); |
444 | } |
445 | |
446 | /* --- @ss_listen@ --- * |
447 | * |
448 | * Arguments: @ssource *ss@ = source to listen on |
449 | * |
450 | * Returns: --- |
451 | * |
452 | * Use: Sets the socket to listen again, if it stopped for some |
453 | * reason. This is a copy of the code in the @read@ function, |
454 | * because it has different (wildly different) error handling |
455 | * behaviour. |
456 | */ |
457 | |
458 | static void ssource_destroy(source */*s*/); |
459 | |
460 | static void ss_listen(ssource *ss) |
461 | { |
462 | gen_addr *ga = (gen_addr *)ss->a; |
463 | int fd; |
464 | |
465 | fw_log(-1, "[%s] reattaching listener", ss->s.desc); |
466 | |
467 | /* --- Make the socket --- */ |
468 | |
469 | if ((fd = socket(ga->a.ops->pf, SOCK_STREAM, 0)) < 0) { |
470 | fw_log(-1, "[%s] couldn't create socket: %s", |
471 | ss->s.desc, strerror(errno)); |
472 | goto fail_0; |
473 | } |
474 | |
475 | /* --- Set it to allow address reuse --- */ |
476 | |
477 | { |
478 | int opt = 1; |
479 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
480 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
481 | } |
482 | |
483 | /* --- Bind it to the right port --- */ |
484 | |
485 | if (bind(fd, &ga->sa, ga->a.sz)) { |
486 | fw_log(-1, "[%s] couldn't bind to %s: %s", ss->s.desc, strerror(errno)); |
487 | goto fail_1; |
488 | } |
489 | if (ga->a.ops->bound) |
490 | ga->a.ops->bound(&ga->a, ss->ao); |
491 | |
492 | /* --- Set it to listen for connections --- */ |
493 | |
494 | if (listen(fd, 5)) { |
495 | fw_log(-1, "[%s] couldn't listen on socket: %s", |
496 | ss->s.desc, strerror(errno)); |
497 | goto fail_1; |
498 | } |
499 | |
500 | /* --- Set the listener up again --- */ |
501 | |
502 | ss->r.fd = fd; |
503 | sel_addfile(&ss->r); |
504 | return; |
505 | |
506 | /* --- Tidy up if it failed --- * |
507 | * |
508 | * I'll just remove the entire source. |
509 | */ |
510 | |
511 | fail_1: |
512 | close(fd); |
513 | fail_0: |
514 | ss->o.conn = 0; |
515 | ssource_destroy(&ss->s); |
516 | } |
517 | |
518 | /* --- @attach@ --- */ |
519 | |
520 | static void ssource_attach(source *s, scanner *sc, target *t) |
521 | { |
522 | ssource *ss = (ssource *)s; |
523 | int fd; |
524 | |
525 | ss->t = t; |
526 | |
527 | /* --- Initialize the description string --- */ |
528 | |
529 | { |
530 | dstr d = DSTR_INIT; |
531 | dstr_puts(&d, "socket."); |
532 | ss->a->ops->print(ss->a, ADDR_SRC, &d); |
533 | dstr_puts(&d, " -> "); |
534 | dstr_puts(&d, ss->t->desc); |
535 | ss->s.desc = xstrdup(d.buf); |
536 | dstr_destroy(&d); |
537 | } |
538 | |
539 | /* --- Initialize the socket for listening --- */ |
540 | |
541 | { |
542 | gen_addr *ga = (gen_addr *)ss->a; |
543 | |
544 | /* --- Make the socket --- */ |
545 | |
546 | if ((fd = socket(ga->a.ops->pf, SOCK_STREAM, 0)) < 0) |
547 | error(sc, "couldn't create socket: %s", strerror(errno)); |
548 | |
549 | /* --- Set it to allow address reuse --- */ |
550 | |
551 | { |
552 | int opt = 1; |
553 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
554 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
555 | } |
556 | |
557 | /* --- Bind it to the right port --- */ |
558 | |
559 | if (bind(fd, &ga->sa, ga->a.sz)) |
560 | error(sc, "couldn't bind to %s: %s", ss->s.desc, strerror(errno)); |
561 | if (ga->a.ops->bound) |
562 | ga->a.ops->bound(&ga->a, ss->ao); |
563 | |
564 | /* --- Set it to listen for connections --- */ |
565 | |
566 | if (listen(fd, 5)) |
567 | error(sc, "couldn't listen on socket: %s", strerror(errno)); |
568 | } |
569 | |
570 | /* --- We're ready to go now --- */ |
571 | |
572 | sel_initfile(sel, &ss->r, fd, SEL_READ, ss_accept, ss); |
573 | sel_addfile(&ss->r); |
574 | source_add(&ss->s); |
575 | fw_inc(); |
576 | } |
577 | |
578 | /* --- @destroy@ --- */ |
579 | |
580 | static void ssource_destroy(source *s) |
581 | { |
582 | ssource *ss = (ssource *)s; |
583 | |
584 | if (ss->o.conn) { |
585 | sel_rmfile(&ss->r); |
586 | close(ss->r.fd); |
587 | if (ss->a->ops->unbind) |
588 | ss->a->ops->unbind(ss->a); |
589 | } |
590 | if (ss->a->ops->freeopts) |
591 | ss->a->ops->freeopts(ss->ao); |
592 | else |
593 | DESTROY(ss->ao); |
594 | /* free(ss->s.desc); */ |
595 | ss->a->ops->destroy(ss->a); |
596 | ss->t->ops->destroy(ss->t); |
597 | source_remove(&ss->s); |
598 | DESTROY(ss); |
599 | fw_dec(); |
600 | } |
601 | |
602 | /* --- Source definition block --- */ |
603 | |
604 | source_ops ssource_ops = { |
605 | "socket", |
606 | ssource_option, ssource_read, ssource_attach, ssource_destroy |
607 | }; |
608 | |
609 | /*----- Target definition -------------------------------------------------*/ |
610 | |
611 | /* --- @read@ --- */ |
612 | |
613 | static target *starget_read(scanner *sc) |
614 | { |
615 | starget *st; |
616 | dstr d = DSTR_INIT; |
617 | |
618 | (void)(conf_prefix(sc, "socket") || conf_prefix(sc, "sk")); |
619 | st = CREATE(starget); |
620 | st->t.ops = &starget_ops; |
621 | st->a = getaddr(sc, ADDR_DEST); |
622 | dstr_puts(&d, "socket."); |
623 | st->a->ops->print(st->a, ADDR_DEST, &d); |
624 | st->t.desc = xstrdup(d.buf); |
625 | dstr_destroy(&d); |
626 | return (&st->t); |
627 | } |
628 | |
629 | /* --- @create@ --- * |
630 | * |
631 | * Arguments: @target *t@ = pointer to target |
632 | * @const char *desc@ = description of connection |
633 | * |
634 | * Returns: Pointer to a created endpoint. |
635 | * |
636 | * Use: Generates a target endpoint for communication. |
637 | */ |
638 | |
639 | static endpt *starget_create(target *t, const char *desc) |
640 | { |
641 | starget *st = (starget *)t; |
642 | stept *e = CREATE(stept); |
643 | int fd; |
644 | gen_addr *ga = (gen_addr *)st->a; |
645 | int opt; |
646 | |
647 | if ((fd = socket(st->a->ops->pf, SOCK_STREAM, 0)) < 0) |
648 | return (0); |
649 | setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt)); |
650 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
651 | e->e.ops = &stept_ops; |
652 | e->e.other = 0; |
653 | e->e.f = EPF_FILE | SKF_CONN; |
654 | e->e.t = 0; |
655 | e->desc = desc; |
656 | |
657 | /* --- Pay attention --- * |
658 | * |
659 | * This bit is quite subtle. The connect can succeed or fail later: that's |
660 | * fine. The problem comes if it makes its mind up right now. The flag |
661 | * @SKF_CONN@ signifies that I'm trying to connect. I set it up to begin |
662 | * with and @stept_go@ turns it off when it's done: @stept_close@ uses it |
663 | * to decide whether to kill the connection. The flag @EPF_PENDING@ is |
664 | * only set after @conn_init@ returns and @SKF_CONN@ is still set (meaning |
665 | * that the connection is still in progress). That's used to let |
666 | * @stept_go@ know whether to kill the other endpoint. The flag |
667 | * @SKF_BROKEN@ is used to signify an immediate failure. |
668 | */ |
669 | |
670 | conn_init(&e->c, sel, fd, &ga->sa, ga->a.sz, stept_go, e); |
671 | if (e->e.f & SKF_BROKEN) { |
672 | DESTROY(e); |
673 | return (0); |
674 | } |
675 | if (e->e.f & SKF_CONN) |
676 | e->e.f |= EPF_PENDING; |
677 | fw_inc(); |
678 | return (&e->e); |
679 | } |
680 | |
681 | /* --- @destroy@ --- */ |
682 | |
683 | static void starget_destroy(target *t) |
684 | { |
685 | starget *st = (starget *)t; |
686 | st->a->ops->destroy(st->a); |
687 | /* free(st->t.desc); */ |
688 | DESTROY(st); |
689 | } |
690 | |
691 | /* --- Socket target definition block --- */ |
692 | |
693 | target_ops starget_ops = { |
694 | "socket", |
695 | 0, starget_read, starget_create, starget_destroy |
696 | }; |
697 | |
698 | /*----- That's all, folks -------------------------------------------------*/ |