48bb1f76 |
1 | /* -*-c-*- |
2 | * |
fed9ddde |
3 | * $Id: socket.c,v 1.9 2002/02/23 00:08:00 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 $ |
fed9ddde |
32 | * Revision 1.9 2002/02/23 00:08:00 mdw |
33 | * Fix stupid bugs from the listen(2) change. |
34 | * |
745cfee1 |
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 | * |
0d3d364b |
39 | * Revision 1.7 2001/06/22 19:37:00 mdw |
40 | * New @conn_init@ interface. |
41 | * |
372a98e2 |
42 | * Revision 1.6 2001/02/03 20:30:03 mdw |
43 | * Support re-reading config files on SIGHUP. |
44 | * |
14865057 |
45 | * Revision 1.5 2000/03/23 23:20:42 mdw |
46 | * Remove listener even if connection option isn't SOCKOPT_LIMITED. |
47 | * |
20922c31 |
48 | * Revision 1.4 1999/12/22 15:44:25 mdw |
49 | * Fix log message. |
50 | * |
0fe44b09 |
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 | * |
e0ce9d38 |
55 | * Revision 1.2 1999/07/27 18:30:53 mdw |
56 | * Various minor portability fixes. |
57 | * |
48bb1f76 |
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> |
0fe44b09 |
69 | #include <limits.h> |
48bb1f76 |
70 | #include <stdio.h> |
71 | #include <stdlib.h> |
72 | #include <string.h> |
73 | |
e0ce9d38 |
74 | #include <sys/types.h> |
75 | #include <unistd.h> |
76 | |
48bb1f76 |
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 { |
0fe44b09 |
105 | unsigned opt; |
48bb1f76 |
106 | unsigned conn; |
745cfee1 |
107 | unsigned listen; |
48bb1f76 |
108 | } ssource_opts; |
109 | |
745cfee1 |
110 | static ssource_opts ssgo = { 256, 0, 5 }; |
0fe44b09 |
111 | |
112 | #define SOCKOPT_LIMIT 0u |
113 | #define SOCKOPT_NOLIMIT 1u |
114 | #define SOCKOPT_ONESHOT 2u |
48bb1f76 |
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; |
372a98e2 |
140 | char *desc; |
48bb1f76 |
141 | } stept; |
142 | |
143 | /* --- Socket source endpoint --- */ |
144 | |
145 | typedef struct ssept { |
146 | endpt e; |
147 | ssource *s; |
148 | } ssept; |
149 | |
48bb1f76 |
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 | |
0fe44b09 |
243 | if (ee->s->o.opt == SOCKOPT_LIMIT) { |
48bb1f76 |
244 | ee->s->o.conn++; |
0fe44b09 |
245 | if (ee->s->o.conn == 1) |
246 | ss_listen(ee->s); |
247 | } |
48bb1f76 |
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 | |
0d3d364b |
260 | if (ee->e.f & EPF_PENDING) |
261 | conn_kill(&ee->c); |
262 | else { |
48bb1f76 |
263 | REFFD_DEC(ee->e.in); |
264 | REFFD_DEC(ee->e.out); |
265 | } |
266 | |
745cfee1 |
267 | xfree(ee->desc); |
48bb1f76 |
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 | |
48bb1f76 |
286 | if (fd == -1) { |
287 | fw_log(-1, "[%s] connection failed: %s", e->desc, strerror(errno)); |
0d3d364b |
288 | endpt_kill(&e->e); |
48bb1f76 |
289 | } else { |
290 | reffd *r = reffd_init(fd); |
291 | REFFD_INC(r); |
292 | e->e.in = e->e.out = r; |
0d3d364b |
293 | e->e.f &= ~EPF_PENDING; |
48bb1f76 |
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 = { |
0fe44b09 |
302 | 0, 0, sept_wclose, ssept_close |
48bb1f76 |
303 | }; |
304 | |
305 | static endpt_ops stept_ops = { |
0fe44b09 |
306 | 0, 0, sept_wclose, stept_close |
48bb1f76 |
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); |
0fe44b09 |
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 | } |
48bb1f76 |
345 | CONF_ACCEPT; |
346 | } |
347 | |
745cfee1 |
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"); |
fed9ddde |
357 | token(sc); |
745cfee1 |
358 | CONF_ACCEPT; |
359 | } |
360 | |
48bb1f76 |
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 | |
0fe44b09 |
425 | static void ssource_destroy(source */*s*/); |
426 | |
48bb1f76 |
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 | } |
0fe44b09 |
463 | fw_inc(); |
48bb1f76 |
464 | |
465 | /* --- Remove the listening socket if necessary --- */ |
466 | |
0fe44b09 |
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; |
48bb1f76 |
488 | } |
489 | |
490 | /* --- Let everything else happen --- */ |
491 | |
48bb1f76 |
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 | |
48bb1f76 |
507 | static void ss_listen(ssource *ss) |
508 | { |
509 | gen_addr *ga = (gen_addr *)ss->a; |
510 | int fd; |
511 | |
0fe44b09 |
512 | if (!(ss->ao->f & ADDRF_NOLOG)) |
513 | fw_log(-1, "[%s] reattaching listener", ss->s.desc); |
48bb1f76 |
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)) { |
20922c31 |
534 | fw_log(-1, "[%s] couldn't bind socket: %s", ss->s.desc, strerror(errno)); |
48bb1f76 |
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 | |
745cfee1 |
542 | if (listen(fd, ss->o.listen)) { |
48bb1f76 |
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 | |
fed9ddde |
614 | if (listen(fd, ss->o.listen)) |
48bb1f76 |
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 | |
14865057 |
632 | if (ss->o.conn || ss->o.opt != SOCKOPT_LIMIT) { |
48bb1f76 |
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); |
745cfee1 |
642 | xfree(ss->s.desc); |
48bb1f76 |
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; |
0d3d364b |
701 | e->e.f = EPF_FILE | EPF_PENDING; |
48bb1f76 |
702 | e->e.t = 0; |
372a98e2 |
703 | e->desc = xstrdup(desc); |
48bb1f76 |
704 | |
0d3d364b |
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)); |
48bb1f76 |
707 | DESTROY(e); |
708 | return (0); |
709 | } |
48bb1f76 |
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); |
745cfee1 |
720 | xfree(st->t.desc); |
48bb1f76 |
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 -------------------------------------------------*/ |