48bb1f76 |
1 | /* -*-c-*- |
2 | * |
0d3d364b |
3 | * $Id: socket.c,v 1.7 2001/06/22 19:37:00 mdw Exp $ |
48bb1f76 |
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 $ |
0d3d364b |
32 | * Revision 1.7 2001/06/22 19:37:00 mdw |
33 | * New @conn_init@ interface. |
34 | * |
372a98e2 |
35 | * Revision 1.6 2001/02/03 20:30:03 mdw |
36 | * Support re-reading config files on SIGHUP. |
37 | * |
14865057 |
38 | * Revision 1.5 2000/03/23 23:20:42 mdw |
39 | * Remove listener even if connection option isn't SOCKOPT_LIMITED. |
40 | * |
20922c31 |
41 | * Revision 1.4 1999/12/22 15:44:25 mdw |
42 | * Fix log message. |
43 | * |
0fe44b09 |
44 | * Revision 1.3 1999/10/22 22:48:36 mdw |
45 | * New connection options: unlimited concurrent connections, and one-shot |
46 | * listening sockets. |
47 | * |
e0ce9d38 |
48 | * Revision 1.2 1999/07/27 18:30:53 mdw |
49 | * Various minor portability fixes. |
50 | * |
48bb1f76 |
51 | * Revision 1.1 1999/07/26 23:33:32 mdw |
52 | * New sources and targets. |
53 | * |
54 | */ |
55 | |
56 | /*----- Header files ------------------------------------------------------*/ |
57 | |
58 | #include "config.h" |
59 | |
60 | #include <ctype.h> |
61 | #include <errno.h> |
0fe44b09 |
62 | #include <limits.h> |
48bb1f76 |
63 | #include <stdio.h> |
64 | #include <stdlib.h> |
65 | #include <string.h> |
66 | |
e0ce9d38 |
67 | #include <sys/types.h> |
68 | #include <unistd.h> |
69 | |
48bb1f76 |
70 | #include <sys/socket.h> |
71 | #include <netinet/in.h> |
72 | #include <arpa/inet.h> |
73 | #include <netdb.h> |
74 | |
75 | #include <mLib/alloc.h> |
76 | #include <mLib/conn.h> |
77 | #include <mLib/dstr.h> |
78 | #include <mLib/fdflags.h> |
79 | #include <mLib/sel.h> |
80 | #include <mLib/sub.h> |
81 | |
82 | #include "addr.h" |
83 | #include "conf.h" |
84 | #include "endpt.h" |
85 | #include "fw.h" |
86 | #include "scan.h" |
87 | #include "socket.h" |
88 | #include "target.h" |
89 | |
90 | #include "inet.h" |
91 | #include "un.h" |
92 | |
93 | /*----- Data structures ---------------------------------------------------*/ |
94 | |
95 | /* --- Socket source options --- */ |
96 | |
97 | typedef struct ssource_opts { |
0fe44b09 |
98 | unsigned opt; |
48bb1f76 |
99 | unsigned conn; |
100 | } ssource_opts; |
101 | |
0fe44b09 |
102 | static ssource_opts ssgo = { 256, 0 }; |
103 | |
104 | #define SOCKOPT_LIMIT 0u |
105 | #define SOCKOPT_NOLIMIT 1u |
106 | #define SOCKOPT_ONESHOT 2u |
48bb1f76 |
107 | |
108 | /* --- Socket source --- */ |
109 | |
110 | typedef struct ssource { |
111 | source s; |
112 | addr *a; |
113 | target *t; |
114 | addr_opts *ao; |
115 | ssource_opts o; |
116 | sel_file r; |
117 | } ssource; |
118 | |
119 | /* --- Socket target --- */ |
120 | |
121 | typedef struct starget { |
122 | target t; |
123 | addr *a; |
124 | addr_opts *ao; |
125 | } starget; |
126 | |
127 | /* --- Socket target endpoint --- */ |
128 | |
129 | typedef struct stept { |
130 | endpt e; |
131 | conn c; |
372a98e2 |
132 | char *desc; |
48bb1f76 |
133 | } stept; |
134 | |
135 | /* --- Socket source endpoint --- */ |
136 | |
137 | typedef struct ssept { |
138 | endpt e; |
139 | ssource *s; |
140 | } ssept; |
141 | |
48bb1f76 |
142 | /*----- Protocol table ----------------------------------------------------*/ |
143 | |
144 | static addr_ops *addrs[] = { &inet_ops, &un_ops, 0 }; |
145 | |
146 | /*----- Other persistent variables ----------------------------------------*/ |
147 | |
148 | static addr_opts gao = { 0 }; |
149 | |
150 | /*----- Parsing address types ---------------------------------------------*/ |
151 | |
152 | /* --- @getaddrtype@ --- * |
153 | * |
154 | * Arguments: @scanner *sc@ = pointer to scanner (for error reporting) |
155 | * @const char *p@ = pointer to protocol name |
156 | * @int abbrev@ = nonzero to allow abbreviations |
157 | * |
158 | * Returns: Pointer to address operations table or null. |
159 | * |
160 | * Use: Looks up a protocol name. Handy when parsing addresses and |
161 | * other bits of configuration. Returns null if no matching |
162 | * address was found. |
163 | */ |
164 | |
165 | static addr_ops *getaddrtype(scanner *sc, const char *p, int abbrev) |
166 | { |
167 | addr_ops **ops; |
168 | addr_ops *chosen = 0; |
169 | size_t sz = strlen(p); |
170 | |
171 | for (ops = addrs; *ops; ops++) { |
172 | if (strncmp((*ops)->name, p, sz) == 0) { |
173 | if ((*ops)->name[sz] == 0) |
174 | return (*ops); |
175 | else if (chosen && abbrev) |
176 | error(sc, "ambiguous socket address type `%s'", p); |
177 | chosen = *ops; |
178 | } |
179 | } |
180 | if (!abbrev) |
181 | return (0); |
182 | return (chosen); |
183 | } |
184 | |
185 | /* --- @getaddr@ --- * |
186 | * |
187 | * Arguments: @scanner *sc@ = pointer to scanner to read from |
188 | * @unsigned type@ = address type (@ADDR_SRC@ or @ADDR_DEST@) |
189 | * |
190 | * Returns: Pointer to an address successfully read. |
191 | * |
192 | * Use: Reads an optionally qualified address. |
193 | */ |
194 | |
195 | static addr *getaddr(scanner *sc, unsigned type) |
196 | { |
197 | addr_ops *ops = 0; |
198 | int abbrev = 0; |
199 | |
200 | if (sc->t == ':') { |
201 | token(sc); |
202 | abbrev = 1; |
203 | } |
204 | if (sc->t == CTOK_WORD) |
205 | ops = getaddrtype(sc, sc->d.buf, abbrev); |
206 | if (ops) |
207 | token(sc); |
208 | else if (abbrev) |
209 | error(sc, "unknown socket address type `%s'", sc->d.buf); |
210 | else |
211 | ops = &inet_ops; |
212 | if (sc->t == ':') |
213 | token(sc); |
214 | |
215 | return (ops->read(sc, type)); |
216 | } |
217 | |
218 | /*----- Socket endpoints --------------------------------------------------*/ |
219 | |
220 | /* --- @wclose@ --- */ |
221 | |
222 | static void sept_wclose(endpt *e) |
223 | { |
224 | shutdown(e->out->fd, 1); |
225 | } |
226 | |
227 | /* --- @close@ (source) --- */ |
228 | |
229 | static void ss_listen(ssource */*ss*/); |
230 | |
231 | static void ssept_close(endpt *e) |
232 | { |
233 | ssept *ee = (ssept *)e; |
234 | |
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235 | if (ee->s->o.opt == SOCKOPT_LIMIT) { |
48bb1f76 |
236 | ee->s->o.conn++; |
0fe44b09 |
237 | if (ee->s->o.conn == 1) |
238 | ss_listen(ee->s); |
239 | } |
48bb1f76 |
240 | REFFD_DEC(ee->e.in); |
241 | REFFD_DEC(ee->e.out); |
242 | fw_dec(); |
243 | DESTROY(ee); |
244 | } |
245 | |
246 | /* --- @close@ (target) --- */ |
247 | |
248 | static void stept_close(endpt *e) |
249 | { |
250 | stept *ee = (stept *)e; |
251 | |
0d3d364b |
252 | if (ee->e.f & EPF_PENDING) |
253 | conn_kill(&ee->c); |
254 | else { |
48bb1f76 |
255 | REFFD_DEC(ee->e.in); |
256 | REFFD_DEC(ee->e.out); |
257 | } |
258 | |
372a98e2 |
259 | free(ee->desc); |
48bb1f76 |
260 | fw_dec(); |
261 | DESTROY(ee); |
262 | } |
263 | |
264 | /* --- @stept_go@ --- * |
265 | * |
266 | * Arguments: @int fd@ = file descriptor now ready for use |
267 | * @void *p@ = pointer to an endpoint structure |
268 | * |
269 | * Returns: --- |
270 | * |
271 | * Use: Handles successful connection of the target endpoint. |
272 | */ |
273 | |
274 | static void stept_go(int fd, void *p) |
275 | { |
276 | stept *e = p; |
277 | |
48bb1f76 |
278 | if (fd == -1) { |
279 | fw_log(-1, "[%s] connection failed: %s", e->desc, strerror(errno)); |
0d3d364b |
280 | endpt_kill(&e->e); |
48bb1f76 |
281 | } else { |
282 | reffd *r = reffd_init(fd); |
283 | REFFD_INC(r); |
284 | e->e.in = e->e.out = r; |
0d3d364b |
285 | e->e.f &= ~EPF_PENDING; |
48bb1f76 |
286 | if (e->e.other) |
287 | endpt_join(&e->e, e->e.other); |
288 | } |
289 | } |
290 | |
291 | /* --- Socket endpoint definition --- */ |
292 | |
293 | static endpt_ops ssept_ops = { |
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294 | 0, 0, sept_wclose, ssept_close |
48bb1f76 |
295 | }; |
296 | |
297 | static endpt_ops stept_ops = { |
0fe44b09 |
298 | 0, 0, sept_wclose, stept_close |
48bb1f76 |
299 | }; |
300 | |
301 | /*----- Source definition -------------------------------------------------*/ |
302 | |
303 | /* --- @option@ --- */ |
304 | |
305 | static int ssource_option(source *s, scanner *sc) |
306 | { |
307 | ssource *ss = (ssource *)s; |
308 | ssource_opts *sso = ss ? &ss->o : &ssgo; |
309 | |
310 | CONF_BEGIN(sc, "socket", "socket") |
311 | |
312 | /* --- Make sure the next token is a word --- */ |
313 | |
314 | if (sc->t != CTOK_WORD) |
315 | error(sc, "parse error, option keyword expected"); |
316 | |
317 | /* --- Handle options at this level --- */ |
318 | |
319 | if (strcmp(sc->d.buf, "conn") == 0) { |
320 | token(sc); |
321 | if (sc->t == '=') |
322 | token(sc); |
0fe44b09 |
323 | if (sc->t != CTOK_WORD) |
324 | error(sc, "parse error, expected `unlimited', `one-shot' or number"); |
325 | if (isdigit((unsigned char)sc->d.buf[0])) { |
326 | sso->conn = atoi(sc->d.buf); |
327 | if (sso->conn == 0) |
328 | error(sc, "argument of `conn' must be positive"); |
329 | sso->opt = SOCKOPT_LIMIT; |
330 | token(sc); |
331 | } else { |
332 | sso->conn = 0; |
333 | sso->opt = 1 + (1 & conf_enum(sc, |
334 | "unlimited,one-shot,infinite", |
335 | ENUM_ABBREV, "`conn' option")); |
336 | } |
48bb1f76 |
337 | CONF_ACCEPT; |
338 | } |
339 | |
340 | if (strcmp(sc->d.buf, "logging") == 0 || |
341 | strcmp(sc->d.buf, "log") == 0) { |
342 | addr_opts *ao = ss ? ss->ao : &gao; |
343 | token(sc); |
344 | if (sc->t == '=') |
345 | token(sc); |
346 | if (conf_enum(sc, "no,yes", ENUM_ABBREV, "logging status")) |
347 | ao->f &= ~ADDRF_NOLOG; |
348 | else |
349 | ao->f |= ADDRF_NOLOG; |
350 | CONF_ACCEPT; |
351 | } |
352 | |
353 | /* --- Pass the option around the various address types --- */ |
354 | |
355 | if (ss) { |
356 | if (ss->a->ops->option && ss->a->ops->option(sc, ss ? ss->ao : 0)) |
357 | CONF_ACCEPT; |
358 | } else { |
359 | addr_ops **a; |
360 | for (a = addrs; *a; a++) { |
361 | if ((*a)->option && (*a)->option(sc, 0)) |
362 | CONF_ACCEPT; |
363 | } |
364 | } |
365 | |
366 | /* --- Nobody understood the option --- */ |
367 | |
368 | CONF_END; |
369 | } |
370 | |
371 | /* --- @read@ --- */ |
372 | |
373 | static source *ssource_read(scanner *sc) |
374 | { |
375 | ssource *ss; |
376 | |
377 | (void)(conf_prefix(sc, "socket") || conf_prefix(sc, "sk")); |
378 | ss = CREATE(ssource); |
379 | ss->s.ops = &ssource_ops; |
380 | ss->s.desc = 0; |
381 | ss->t = 0; |
382 | ss->a = getaddr(sc, ADDR_SRC); |
383 | if (ss->a->ops->initopts) |
384 | ss->ao = ss->a->ops->initopts(); |
385 | else |
386 | ss->ao = CREATE(addr_opts); |
387 | *ss->ao = gao; |
388 | ss->o = ssgo; |
389 | return (&ss->s); |
390 | } |
391 | |
392 | /* --- @ss_accept@ --- * |
393 | * |
394 | * Arguments: @int fd@ = file descriptor to accept from |
395 | * @unsigned mode@ = what's ready with the descriptor |
396 | * @void *p@ = pointer to the source definition |
397 | * |
398 | * Returns: --- |
399 | * |
400 | * Use: Accepts an incoming connection and attaches it to a target |
401 | * endpoint. |
402 | */ |
403 | |
0fe44b09 |
404 | static void ssource_destroy(source */*s*/); |
405 | |
48bb1f76 |
406 | static void ss_accept(int fd, unsigned mode, void *p) |
407 | { |
408 | ssource *ss = p; |
409 | ssept *e; |
410 | endpt *ee; |
411 | reffd *r; |
412 | |
413 | /* --- Make the file descriptor --- */ |
414 | |
415 | { |
416 | int opt = 1; |
417 | if ((r = ss->a->ops->accept(fd, ss->ao, ss->s.desc)) == 0) |
418 | return; |
419 | setsockopt(r->fd, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt)); |
420 | fdflags(r->fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
421 | } |
422 | |
423 | /* --- Make an endpoint --- */ |
424 | |
425 | e = CREATE(ssept); |
426 | e->e.ops = &ssept_ops; |
427 | e->e.other = 0; |
428 | e->e.f = EPF_FILE; |
429 | e->e.t = 0; |
430 | e->e.in = e->e.out = r; |
431 | e->s = ss; |
432 | REFFD_INC(r); |
433 | |
434 | /* --- Obtain the target endpoint and let rip --- */ |
435 | |
436 | if ((ee = ss->t->ops->create(ss->t, ss->s.desc)) == 0) { |
437 | REFFD_DEC(r); |
438 | REFFD_DEC(r); |
439 | DESTROY(e); |
440 | return; |
441 | } |
0fe44b09 |
442 | fw_inc(); |
48bb1f76 |
443 | |
444 | /* --- Remove the listening socket if necessary --- */ |
445 | |
0fe44b09 |
446 | switch (ss->o.opt) { |
447 | case SOCKOPT_LIMIT: |
448 | ss->o.conn--; |
449 | if (!ss->o.conn) { |
450 | if (!(ss->ao->f & ADDRF_NOLOG)) |
451 | fw_log(-1, "[%s] maximum connections reached", ss->s.desc); |
452 | sel_rmfile(&ss->r); |
453 | close(ss->r.fd); |
454 | if (ss->a->ops->unbind) |
455 | ss->a->ops->unbind(ss->a); |
456 | } |
457 | break; |
458 | case SOCKOPT_NOLIMIT: |
459 | break; |
460 | case SOCKOPT_ONESHOT: |
461 | sel_rmfile(&ss->r); |
462 | close(ss->r.fd); |
463 | if (ss->a->ops->unbind) |
464 | ss->a->ops->unbind(ss->a); |
465 | ssource_destroy(&ss->s); |
466 | break; |
48bb1f76 |
467 | } |
468 | |
469 | /* --- Let everything else happen --- */ |
470 | |
48bb1f76 |
471 | endpt_join(&e->e, ee); |
472 | } |
473 | |
474 | /* --- @ss_listen@ --- * |
475 | * |
476 | * Arguments: @ssource *ss@ = source to listen on |
477 | * |
478 | * Returns: --- |
479 | * |
480 | * Use: Sets the socket to listen again, if it stopped for some |
481 | * reason. This is a copy of the code in the @read@ function, |
482 | * because it has different (wildly different) error handling |
483 | * behaviour. |
484 | */ |
485 | |
48bb1f76 |
486 | static void ss_listen(ssource *ss) |
487 | { |
488 | gen_addr *ga = (gen_addr *)ss->a; |
489 | int fd; |
490 | |
0fe44b09 |
491 | if (!(ss->ao->f & ADDRF_NOLOG)) |
492 | fw_log(-1, "[%s] reattaching listener", ss->s.desc); |
48bb1f76 |
493 | |
494 | /* --- Make the socket --- */ |
495 | |
496 | if ((fd = socket(ga->a.ops->pf, SOCK_STREAM, 0)) < 0) { |
497 | fw_log(-1, "[%s] couldn't create socket: %s", |
498 | ss->s.desc, strerror(errno)); |
499 | goto fail_0; |
500 | } |
501 | |
502 | /* --- Set it to allow address reuse --- */ |
503 | |
504 | { |
505 | int opt = 1; |
506 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
507 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
508 | } |
509 | |
510 | /* --- Bind it to the right port --- */ |
511 | |
512 | if (bind(fd, &ga->sa, ga->a.sz)) { |
20922c31 |
513 | fw_log(-1, "[%s] couldn't bind socket: %s", ss->s.desc, strerror(errno)); |
48bb1f76 |
514 | goto fail_1; |
515 | } |
516 | if (ga->a.ops->bound) |
517 | ga->a.ops->bound(&ga->a, ss->ao); |
518 | |
519 | /* --- Set it to listen for connections --- */ |
520 | |
521 | if (listen(fd, 5)) { |
522 | fw_log(-1, "[%s] couldn't listen on socket: %s", |
523 | ss->s.desc, strerror(errno)); |
524 | goto fail_1; |
525 | } |
526 | |
527 | /* --- Set the listener up again --- */ |
528 | |
529 | ss->r.fd = fd; |
530 | sel_addfile(&ss->r); |
531 | return; |
532 | |
533 | /* --- Tidy up if it failed --- * |
534 | * |
535 | * I'll just remove the entire source. |
536 | */ |
537 | |
538 | fail_1: |
539 | close(fd); |
540 | fail_0: |
541 | ss->o.conn = 0; |
542 | ssource_destroy(&ss->s); |
543 | } |
544 | |
545 | /* --- @attach@ --- */ |
546 | |
547 | static void ssource_attach(source *s, scanner *sc, target *t) |
548 | { |
549 | ssource *ss = (ssource *)s; |
550 | int fd; |
551 | |
552 | ss->t = t; |
553 | |
554 | /* --- Initialize the description string --- */ |
555 | |
556 | { |
557 | dstr d = DSTR_INIT; |
558 | dstr_puts(&d, "socket."); |
559 | ss->a->ops->print(ss->a, ADDR_SRC, &d); |
560 | dstr_puts(&d, " -> "); |
561 | dstr_puts(&d, ss->t->desc); |
562 | ss->s.desc = xstrdup(d.buf); |
563 | dstr_destroy(&d); |
564 | } |
565 | |
566 | /* --- Initialize the socket for listening --- */ |
567 | |
568 | { |
569 | gen_addr *ga = (gen_addr *)ss->a; |
570 | |
571 | /* --- Make the socket --- */ |
572 | |
573 | if ((fd = socket(ga->a.ops->pf, SOCK_STREAM, 0)) < 0) |
574 | error(sc, "couldn't create socket: %s", strerror(errno)); |
575 | |
576 | /* --- Set it to allow address reuse --- */ |
577 | |
578 | { |
579 | int opt = 1; |
580 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
581 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
582 | } |
583 | |
584 | /* --- Bind it to the right port --- */ |
585 | |
586 | if (bind(fd, &ga->sa, ga->a.sz)) |
587 | error(sc, "couldn't bind to %s: %s", ss->s.desc, strerror(errno)); |
588 | if (ga->a.ops->bound) |
589 | ga->a.ops->bound(&ga->a, ss->ao); |
590 | |
591 | /* --- Set it to listen for connections --- */ |
592 | |
593 | if (listen(fd, 5)) |
594 | error(sc, "couldn't listen on socket: %s", strerror(errno)); |
595 | } |
596 | |
597 | /* --- We're ready to go now --- */ |
598 | |
599 | sel_initfile(sel, &ss->r, fd, SEL_READ, ss_accept, ss); |
600 | sel_addfile(&ss->r); |
601 | source_add(&ss->s); |
602 | fw_inc(); |
603 | } |
604 | |
605 | /* --- @destroy@ --- */ |
606 | |
607 | static void ssource_destroy(source *s) |
608 | { |
609 | ssource *ss = (ssource *)s; |
610 | |
14865057 |
611 | if (ss->o.conn || ss->o.opt != SOCKOPT_LIMIT) { |
48bb1f76 |
612 | sel_rmfile(&ss->r); |
613 | close(ss->r.fd); |
614 | if (ss->a->ops->unbind) |
615 | ss->a->ops->unbind(ss->a); |
616 | } |
617 | if (ss->a->ops->freeopts) |
618 | ss->a->ops->freeopts(ss->ao); |
619 | else |
620 | DESTROY(ss->ao); |
372a98e2 |
621 | free(ss->s.desc); |
48bb1f76 |
622 | ss->a->ops->destroy(ss->a); |
623 | ss->t->ops->destroy(ss->t); |
624 | source_remove(&ss->s); |
625 | DESTROY(ss); |
626 | fw_dec(); |
627 | } |
628 | |
629 | /* --- Source definition block --- */ |
630 | |
631 | source_ops ssource_ops = { |
632 | "socket", |
633 | ssource_option, ssource_read, ssource_attach, ssource_destroy |
634 | }; |
635 | |
636 | /*----- Target definition -------------------------------------------------*/ |
637 | |
638 | /* --- @read@ --- */ |
639 | |
640 | static target *starget_read(scanner *sc) |
641 | { |
642 | starget *st; |
643 | dstr d = DSTR_INIT; |
644 | |
645 | (void)(conf_prefix(sc, "socket") || conf_prefix(sc, "sk")); |
646 | st = CREATE(starget); |
647 | st->t.ops = &starget_ops; |
648 | st->a = getaddr(sc, ADDR_DEST); |
649 | dstr_puts(&d, "socket."); |
650 | st->a->ops->print(st->a, ADDR_DEST, &d); |
651 | st->t.desc = xstrdup(d.buf); |
652 | dstr_destroy(&d); |
653 | return (&st->t); |
654 | } |
655 | |
656 | /* --- @create@ --- * |
657 | * |
658 | * Arguments: @target *t@ = pointer to target |
659 | * @const char *desc@ = description of connection |
660 | * |
661 | * Returns: Pointer to a created endpoint. |
662 | * |
663 | * Use: Generates a target endpoint for communication. |
664 | */ |
665 | |
666 | static endpt *starget_create(target *t, const char *desc) |
667 | { |
668 | starget *st = (starget *)t; |
669 | stept *e = CREATE(stept); |
670 | int fd; |
671 | gen_addr *ga = (gen_addr *)st->a; |
672 | int opt; |
673 | |
674 | if ((fd = socket(st->a->ops->pf, SOCK_STREAM, 0)) < 0) |
675 | return (0); |
676 | setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt)); |
677 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
678 | e->e.ops = &stept_ops; |
679 | e->e.other = 0; |
0d3d364b |
680 | e->e.f = EPF_FILE | EPF_PENDING; |
48bb1f76 |
681 | e->e.t = 0; |
372a98e2 |
682 | e->desc = xstrdup(desc); |
48bb1f76 |
683 | |
0d3d364b |
684 | if (conn_init(&e->c, sel, fd, &ga->sa, ga->a.sz, stept_go, e)) { |
685 | fw_log(-1, "[%s] connection failed: %s", e->desc, strerror(errno)); |
48bb1f76 |
686 | DESTROY(e); |
687 | return (0); |
688 | } |
48bb1f76 |
689 | fw_inc(); |
690 | return (&e->e); |
691 | } |
692 | |
693 | /* --- @destroy@ --- */ |
694 | |
695 | static void starget_destroy(target *t) |
696 | { |
697 | starget *st = (starget *)t; |
698 | st->a->ops->destroy(st->a); |
372a98e2 |
699 | free(st->t.desc); |
48bb1f76 |
700 | DESTROY(st); |
701 | } |
702 | |
703 | /* --- Socket target definition block --- */ |
704 | |
705 | target_ops starget_ops = { |
706 | "socket", |
707 | 0, starget_read, starget_create, starget_destroy |
708 | }; |
709 | |
710 | /*----- That's all, folks -------------------------------------------------*/ |