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1 | /* |
2 | * ssld.c: The ircd-ratbox ssl/zlib helper daemon thingy | |
3 | * Copyright (C) 2007 Aaron Sethman <androsyn@ratbox.org> | |
4 | * Copyright (C) 2007 ircd-ratbox development team | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 | |
19 | * USA | |
20 | * | |
21 | * $Id: ssld.c 25179 2008-03-30 16:34:57Z androsyn $ | |
22 | */ | |
23 | ||
24 | ||
25 | #include "stdinc.h" | |
26 | ||
27 | #ifdef HAVE_LIBZ | |
28 | #include <zlib.h> | |
29 | #endif | |
30 | ||
31 | #define MAXPASSFD 4 | |
32 | #ifndef READBUF_SIZE | |
33 | #define READBUF_SIZE 16384 | |
34 | #endif | |
35 | ||
36 | static void setup_signals(void); | |
37 | ||
38 | static inline rb_int32_t buf_to_int32(char *buf) | |
39 | { | |
40 | rb_int32_t x; | |
41 | x = *buf << 24; | |
42 | x |= *(++buf) << 16; | |
43 | x |= *(++buf) << 8; | |
44 | x |= *(++buf); | |
45 | return x; | |
46 | } | |
47 | ||
48 | static inline void int32_to_buf(char *buf, rb_int32_t x) | |
49 | { | |
50 | *(buf) = x >> 24 & 0xFF; | |
51 | *(++buf) = x >> 16 & 0xFF; | |
52 | *(++buf) = x >> 8 & 0xFF; | |
53 | *(++buf) = x & 0xFF; | |
54 | return; | |
55 | } | |
56 | ||
57 | static inline rb_uint16_t buf_to_uint16(char *buf) | |
58 | { | |
59 | rb_uint16_t x; | |
60 | x = *(buf) << 8; | |
61 | x |= *(++buf); | |
62 | return x; | |
63 | } | |
64 | ||
65 | static inline void uint16_to_buf(char *buf, rb_uint16_t x) | |
66 | { | |
67 | *(buf) = x >> 8 & 0xFF; | |
68 | *(++buf) = x & 0xFF; | |
69 | return; | |
70 | } | |
71 | ||
72 | ||
73 | ||
74 | static char inbuf[READBUF_SIZE]; | |
75 | static char outbuf[READBUF_SIZE]; | |
76 | ||
77 | typedef struct _mod_ctl_buf | |
78 | { | |
79 | rb_dlink_node node; | |
80 | char *buf; | |
81 | size_t buflen; | |
82 | rb_fde_t *F[MAXPASSFD]; | |
83 | int nfds; | |
84 | } mod_ctl_buf_t; | |
85 | ||
86 | typedef struct _mod_ctl | |
87 | { | |
88 | rb_dlink_node node; | |
89 | int cli_count; | |
90 | rb_fde_t *F; | |
91 | rb_fde_t *F_pipe; | |
92 | rb_dlink_list readq; | |
93 | rb_dlink_list writeq; | |
94 | } mod_ctl_t; | |
95 | ||
96 | static mod_ctl_t *mod_ctl; | |
97 | ||
98 | ||
99 | #ifdef HAVE_LIBZ | |
100 | typedef struct _zlib_stream | |
101 | { | |
102 | z_stream instream; | |
103 | z_stream outstream; | |
104 | } zlib_stream_t; | |
105 | #endif | |
106 | ||
107 | typedef struct _conn | |
108 | { | |
109 | rb_dlink_node node; | |
110 | mod_ctl_t *ctl; | |
111 | rawbuf_head_t *modbuf_out; | |
112 | rawbuf_head_t *plainbuf_out; | |
113 | ||
114 | rb_int32_t id; | |
115 | ||
116 | rb_fde_t *mod_fd; | |
117 | rb_fde_t *plain_fd; | |
118 | unsigned long long mod_out; | |
119 | unsigned long long mod_in; | |
120 | unsigned long long plain_in; | |
121 | unsigned long long plain_out; | |
122 | rb_uint8_t flags; | |
123 | void *stream; | |
124 | } conn_t; | |
125 | ||
126 | #define FLAG_SSL 0x01 | |
127 | #define FLAG_ZIP 0x02 | |
128 | #define FLAG_CORK 0x04 | |
129 | #define FLAG_DEAD 0x08 | |
130 | ||
131 | ||
132 | #define IsSSL(x) ((x)->flags & FLAG_SSL) | |
133 | #define IsZip(x) ((x)->flags & FLAG_ZIP) | |
134 | #define IsCork(x) ((x)->flags & FLAG_CORK) | |
135 | #define IsDead(x) ((x)->flags & FLAG_DEAD) | |
136 | ||
137 | #define SetSSL(x) ((x)->flags |= FLAG_SSL) | |
138 | #define SetZip(x) ((x)->flags |= FLAG_ZIP) | |
139 | #define SetCork(x) ((x)->flags |= FLAG_CORK) | |
140 | #define SetDead(x) ((x)->flags |= FLAG_DEAD) | |
141 | ||
142 | #define ClearSSL(x) ((x)->flags &= ~FLAG_SSL) | |
143 | #define ClearZip(x) ((x)->flags &= ~FLAG_ZIP) | |
144 | #define ClearCork(x) ((x)->flags &= ~FLAG_CORK) | |
145 | #define ClearDead(x) ((x)->flags &= ~FLAG_DEAD) | |
146 | ||
147 | #define NO_WAIT 0x0 | |
148 | #define WAIT_PLAIN 0x1 | |
149 | ||
150 | #define CONN_HASH_SIZE 2000 | |
151 | #define connid_hash(x) (&connid_hash_table[(x % CONN_HASH_SIZE)]) | |
152 | ||
153 | static rb_dlink_list connid_hash_table[CONN_HASH_SIZE]; | |
154 | static rb_dlink_list dead_list; | |
155 | ||
156 | static void conn_mod_write_sendq(rb_fde_t *, void *data); | |
157 | static void conn_plain_write_sendq(rb_fde_t *, void *data); | |
158 | static void mod_write_ctl(rb_fde_t *, void *data); | |
159 | static void conn_plain_read_cb(rb_fde_t * fd, void *data); | |
160 | static void mod_cmd_write_queue(mod_ctl_t *ctl, const void *data, size_t len); | |
161 | static const char *remote_closed = "Remote host closed the connection"; | |
162 | static int ssl_ok; | |
163 | #ifdef HAVE_LIBZ | |
164 | static int zlib_ok = 1; | |
165 | #else | |
166 | static int zlib_ok = 0; | |
167 | #endif | |
168 | static void * | |
169 | ssld_alloc(void *unused, size_t count, size_t size) | |
170 | { | |
171 | return rb_malloc(count * size); | |
172 | } | |
173 | ||
174 | static void | |
175 | ssld_free(void *unused, void *ptr) | |
176 | { | |
177 | rb_free(ptr); | |
178 | } | |
179 | ||
180 | static conn_t * | |
181 | conn_find_by_id(rb_int32_t id) | |
182 | { | |
183 | rb_dlink_node *ptr; | |
184 | conn_t *conn; | |
185 | ||
186 | RB_DLINK_FOREACH(ptr, (connid_hash(id))->head) | |
187 | { | |
188 | conn = ptr->data; | |
189 | if(conn->id == id && !IsDead(conn)) | |
190 | return conn; | |
191 | } | |
192 | return NULL; | |
193 | } | |
194 | ||
195 | static void | |
196 | conn_add_id_hash(conn_t * conn, rb_int32_t id) | |
197 | { | |
198 | conn->id = id; | |
199 | rb_dlinkAdd(conn, &conn->node, connid_hash(id)); | |
200 | } | |
201 | ||
202 | static void | |
203 | free_conn(conn_t * conn) | |
204 | { | |
205 | rb_free_rawbuffer(conn->modbuf_out); | |
206 | rb_free_rawbuffer(conn->plainbuf_out); | |
207 | if(IsZip(conn)) | |
208 | { | |
209 | zlib_stream_t *stream = conn->stream; | |
210 | inflateEnd(&stream->instream); | |
211 | deflateEnd(&stream->outstream); | |
212 | } | |
213 | rb_free(conn); | |
214 | } | |
215 | ||
216 | static void | |
217 | clean_dead_conns(void *unused) | |
218 | { | |
219 | conn_t *conn; | |
220 | rb_dlink_node *ptr, *next; | |
221 | RB_DLINK_FOREACH_SAFE(ptr, next, dead_list.head) | |
222 | { | |
223 | conn = ptr->data; | |
224 | free_conn(conn); | |
225 | } | |
226 | dead_list.tail = dead_list.head = NULL; | |
227 | } | |
228 | ||
229 | ||
230 | static void | |
231 | close_conn(conn_t * conn, int wait_plain, const char *fmt, ...) | |
232 | { | |
233 | va_list ap; | |
234 | char reason[128]; /* must always be under 250 bytes */ | |
235 | char buf[256]; | |
236 | int len; | |
237 | if(IsDead(conn)) | |
238 | return; | |
239 | ||
240 | rb_rawbuf_flush(conn->modbuf_out, conn->mod_fd); | |
241 | rb_rawbuf_flush(conn->plainbuf_out, conn->plain_fd); | |
242 | rb_close(conn->mod_fd); | |
243 | SetDead(conn); | |
244 | ||
245 | if(!wait_plain || fmt == NULL) | |
246 | { | |
247 | rb_close(conn->plain_fd); | |
248 | ||
249 | if(conn->id >= 0) | |
250 | rb_dlinkDelete(&conn->node, connid_hash(conn->id)); | |
251 | rb_dlinkAdd(conn, &conn->node, &dead_list); | |
252 | return; | |
253 | } | |
254 | rb_setselect(conn->plain_fd, RB_SELECT_WRITE|RB_SELECT_READ, NULL, NULL); | |
255 | va_start(ap, fmt); | |
256 | rb_vsnprintf(reason, sizeof(reason), fmt, ap); | |
257 | va_end(ap); | |
258 | ||
259 | buf[0] = 'D'; | |
260 | int32_to_buf(&buf[1], conn->id); | |
261 | strcpy(&buf[5], reason); | |
262 | len = (strlen(reason) + 1) + 5; | |
263 | mod_cmd_write_queue(conn->ctl, buf, len); | |
264 | } | |
265 | ||
266 | static conn_t * | |
267 | make_conn(mod_ctl_t *ctl, rb_fde_t * mod_fd, rb_fde_t * plain_fd) | |
268 | { | |
269 | conn_t *conn = rb_malloc(sizeof(conn_t)); | |
270 | conn->ctl = ctl; | |
271 | conn->modbuf_out = rb_new_rawbuffer(); | |
272 | conn->plainbuf_out = rb_new_rawbuffer(); | |
273 | conn->mod_fd = mod_fd; | |
274 | conn->plain_fd = plain_fd; | |
275 | conn->id = -1; | |
276 | conn->stream = NULL; | |
277 | rb_set_nb(mod_fd); | |
278 | rb_set_nb(plain_fd); | |
279 | return conn; | |
280 | } | |
281 | ||
282 | static void | |
283 | conn_mod_write_sendq(rb_fde_t * fd, void *data) | |
284 | { | |
285 | conn_t *conn = data; | |
286 | const char *err; | |
287 | int retlen; | |
288 | if(IsDead(conn)) | |
289 | return; | |
290 | ||
291 | while ((retlen = rb_rawbuf_flush(conn->modbuf_out, fd)) > 0) | |
292 | conn->mod_out += retlen; | |
293 | ||
294 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
295 | { | |
296 | if(retlen == 0) | |
297 | close_conn(conn, WAIT_PLAIN, "%s", remote_closed); | |
298 | if(IsSSL(conn) && retlen == RB_RW_SSL_ERROR) | |
299 | err = rb_get_ssl_strerror(conn->mod_fd); | |
300 | else | |
301 | err = strerror(errno); | |
302 | close_conn(conn, WAIT_PLAIN, "Write error: %s", err); | |
303 | return; | |
304 | } | |
305 | if(rb_rawbuf_length(conn->modbuf_out) > 0) | |
306 | { | |
307 | int flags = RB_SELECT_WRITE; | |
308 | if(retlen == RB_RW_SSL_NEED_READ) | |
309 | flags |= RB_SELECT_READ; | |
310 | ||
311 | rb_setselect(conn->mod_fd, flags, conn_mod_write_sendq, conn); | |
312 | } | |
313 | else | |
314 | rb_setselect(conn->mod_fd, RB_SELECT_WRITE, NULL, NULL); | |
315 | ||
316 | if(IsCork(conn) && rb_rawbuf_length(conn->modbuf_out) == 0) | |
317 | { | |
318 | ClearCork(conn); | |
319 | conn_plain_read_cb(conn->plain_fd, conn); | |
320 | } | |
321 | ||
322 | } | |
323 | ||
324 | static void | |
325 | conn_mod_write(conn_t * conn, void *data, size_t len) | |
326 | { | |
327 | if(IsDead(conn)) /* no point in queueing to a dead man */ | |
328 | return; | |
329 | rb_rawbuf_append(conn->modbuf_out, data, len); | |
330 | } | |
331 | ||
332 | static void | |
333 | conn_plain_write(conn_t * conn, void *data, size_t len) | |
334 | { | |
335 | if(IsDead(conn)) /* again no point in queueing to dead men */ | |
336 | return; | |
337 | rb_rawbuf_append(conn->plainbuf_out, data, len); | |
338 | } | |
339 | ||
340 | static void | |
341 | mod_cmd_write_queue(mod_ctl_t * ctl, const void *data, size_t len) | |
342 | { | |
343 | mod_ctl_buf_t *ctl_buf; | |
344 | ctl_buf = rb_malloc(sizeof(mod_ctl_buf_t)); | |
345 | ctl_buf->buf = rb_malloc(len); | |
346 | ctl_buf->buflen = len; | |
347 | memcpy(ctl_buf->buf, data, len); | |
348 | ctl_buf->nfds = 0; | |
349 | rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq); | |
350 | mod_write_ctl(ctl->F, ctl); | |
351 | } | |
352 | ||
353 | #ifdef HAVE_LIBZ | |
354 | static void | |
355 | common_zlib_deflate(conn_t * conn, void *buf, size_t len) | |
356 | { | |
357 | int ret, have; | |
358 | z_stream *outstream = &((zlib_stream_t *)conn->stream)->outstream; | |
359 | outstream->next_in = buf; | |
360 | outstream->avail_in = len; | |
361 | outstream->next_out = (Bytef *) outbuf; | |
362 | outstream->avail_out = sizeof(outbuf); | |
363 | ||
364 | ret = deflate(outstream, Z_SYNC_FLUSH); | |
365 | if(ret != Z_OK) | |
366 | { | |
367 | /* deflate error */ | |
368 | close_conn(conn, WAIT_PLAIN, "Deflate failed: %s", zError(ret)); | |
369 | return; | |
370 | } | |
371 | if(outstream->avail_out == 0) | |
372 | { | |
373 | /* avail_out empty */ | |
374 | close_conn(conn, WAIT_PLAIN, "error compressing data, avail_out == 0"); | |
375 | return; | |
376 | } | |
377 | if(outstream->avail_in != 0) | |
378 | { | |
379 | /* avail_in isn't empty...*/ | |
380 | close_conn(conn, WAIT_PLAIN, "error compressing data, avail_in != 0"); | |
381 | return; | |
382 | } | |
383 | have = sizeof(outbuf) - outstream->avail_out; | |
384 | conn_mod_write(conn, outbuf, have); | |
385 | } | |
386 | ||
387 | static void | |
388 | common_zlib_inflate(conn_t * conn, void *buf, size_t len) | |
389 | { | |
390 | int ret, have; | |
391 | ((zlib_stream_t *)conn->stream)->instream.next_in = buf; | |
392 | ((zlib_stream_t *)conn->stream)->instream.avail_in = len; | |
393 | ((zlib_stream_t *)conn->stream)->instream.next_out = (Bytef *) outbuf; | |
394 | ((zlib_stream_t *)conn->stream)->instream.avail_out = sizeof(outbuf); | |
395 | ||
396 | while (((zlib_stream_t *)conn->stream)->instream.avail_in) | |
397 | { | |
398 | ret = inflate(&((zlib_stream_t *)conn->stream)->instream, Z_NO_FLUSH); | |
399 | if(ret != Z_OK) | |
400 | { | |
401 | if(!strncmp("ERROR ", buf, 6)) | |
402 | { | |
403 | close_conn(conn, WAIT_PLAIN, "Received uncompressed ERROR"); | |
404 | return; | |
405 | } | |
406 | close_conn(conn, WAIT_PLAIN, "Inflate failed: %s", zError(ret)); | |
407 | return; | |
408 | } | |
409 | have = sizeof(outbuf) - ((zlib_stream_t *)conn->stream)->instream.avail_out; | |
410 | ||
411 | if(((zlib_stream_t *)conn->stream)->instream.avail_in) | |
412 | { | |
413 | conn_plain_write(conn, outbuf, have); | |
414 | have = 0; | |
415 | ((zlib_stream_t *)conn->stream)->instream.next_out = (Bytef *) outbuf; | |
416 | ((zlib_stream_t *)conn->stream)->instream.avail_out = sizeof(outbuf); | |
417 | } | |
418 | } | |
419 | if(have == 0) | |
420 | return; | |
421 | ||
422 | conn_plain_write(conn, outbuf, have); | |
423 | } | |
424 | #endif | |
425 | ||
426 | static int | |
427 | plain_check_cork(conn_t * conn) | |
428 | { | |
429 | if(rb_rawbuf_length(conn->modbuf_out) >= 4096) | |
430 | { | |
431 | /* if we have over 4k pending outbound, don't read until | |
432 | * we've cleared the queue */ | |
433 | SetCork(conn); | |
434 | rb_setselect(conn->plain_fd, RB_SELECT_READ, NULL, NULL); | |
435 | /* try to write */ | |
436 | conn_mod_write_sendq(conn->mod_fd, conn); | |
437 | return 1; | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
442 | ||
443 | static void | |
444 | conn_plain_read_cb(rb_fde_t * fd, void *data) | |
445 | { | |
446 | conn_t *conn = data; | |
447 | int length = 0; | |
448 | if(conn == NULL) | |
449 | return; | |
450 | ||
451 | if(IsDead(conn)) | |
452 | return; | |
453 | ||
454 | if(plain_check_cork(conn)) | |
455 | return; | |
456 | ||
457 | while (1) | |
458 | { | |
459 | if(IsDead(conn)) | |
460 | return; | |
461 | ||
462 | length = rb_read(conn->plain_fd, inbuf, sizeof(inbuf)); | |
463 | ||
464 | if(length == 0 || (length < 0 && !rb_ignore_errno(errno))) | |
465 | { | |
466 | close_conn(conn, NO_WAIT, NULL); | |
467 | return; | |
468 | } | |
469 | ||
470 | if(length < 0) | |
471 | { | |
472 | rb_setselect(conn->plain_fd, RB_SELECT_READ, conn_plain_read_cb, conn); | |
473 | conn_mod_write_sendq(conn->mod_fd, conn); | |
474 | return; | |
475 | } | |
476 | conn->plain_in += length; | |
477 | ||
478 | #ifdef HAVE_LIBZ | |
479 | if(IsZip(conn)) | |
480 | common_zlib_deflate(conn, inbuf, length); | |
481 | else | |
482 | #endif | |
483 | conn_mod_write(conn, inbuf, length); | |
484 | if(IsDead(conn)) | |
485 | return; | |
486 | if(plain_check_cork(conn)) | |
487 | return; | |
488 | } | |
489 | } | |
490 | ||
491 | static void | |
492 | conn_mod_read_cb(rb_fde_t * fd, void *data) | |
493 | { | |
494 | conn_t *conn = data; | |
495 | const char *err = remote_closed; | |
496 | int length; | |
497 | if(conn == NULL) | |
498 | return; | |
499 | if(IsDead(conn)) | |
500 | return; | |
501 | ||
502 | while (1) | |
503 | { | |
504 | if(IsDead(conn)) | |
505 | return; | |
506 | ||
507 | length = rb_read(conn->mod_fd, inbuf, sizeof(inbuf)); | |
508 | ||
509 | if(length == 0 || (length < 0 && !rb_ignore_errno(errno))) | |
510 | { | |
511 | if(length == 0) { | |
512 | close_conn(conn, WAIT_PLAIN, "%s", remote_closed); | |
513 | return; | |
514 | } | |
515 | ||
516 | if(IsSSL(conn) && length == RB_RW_SSL_ERROR) | |
517 | err = rb_get_ssl_strerror(conn->mod_fd); | |
518 | else | |
519 | err = strerror(errno); | |
520 | close_conn(conn, WAIT_PLAIN, "Read error: %s", err); | |
521 | return; | |
522 | } | |
523 | if(length < 0) | |
524 | { | |
525 | int flags = RB_SELECT_READ; | |
526 | if(length == RB_RW_SSL_NEED_WRITE) | |
527 | flags |= RB_SELECT_WRITE; | |
528 | ||
529 | rb_setselect(conn->mod_fd, flags, conn_mod_read_cb, conn); | |
530 | conn_plain_write_sendq(conn->plain_fd, conn); | |
531 | return; | |
532 | } | |
533 | conn->mod_in += length; | |
534 | #ifdef HAVE_LIBZ | |
535 | if(IsZip(conn)) | |
536 | common_zlib_inflate(conn, inbuf, length); | |
537 | else | |
538 | #endif | |
539 | conn_plain_write(conn, inbuf, length); | |
540 | } | |
541 | } | |
542 | ||
543 | static void | |
544 | conn_plain_write_sendq(rb_fde_t * fd, void *data) | |
545 | { | |
546 | conn_t *conn = data; | |
547 | int retlen; | |
548 | ||
549 | if(IsDead(conn)) | |
550 | return; | |
551 | ||
552 | while ((retlen = rb_rawbuf_flush(conn->plainbuf_out, fd)) > 0) | |
553 | { | |
554 | conn->plain_out += retlen; | |
555 | } | |
556 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
557 | { | |
558 | close_conn(data, NO_WAIT, NULL); | |
559 | return; | |
560 | } | |
561 | ||
562 | ||
563 | if(rb_rawbuf_length(conn->plainbuf_out) > 0) | |
564 | rb_setselect(conn->plain_fd, RB_SELECT_WRITE, conn_plain_write_sendq, conn); | |
565 | else | |
566 | rb_setselect(conn->plain_fd, RB_SELECT_WRITE, NULL, NULL); | |
567 | } | |
568 | ||
569 | static int | |
570 | maxconn(void) | |
571 | { | |
572 | #if defined(RLIMIT_NOFILE) && defined(HAVE_SYS_RESOURCE_H) | |
573 | struct rlimit limit; | |
574 | ||
575 | if(!getrlimit(RLIMIT_NOFILE, &limit)) | |
576 | { | |
577 | return limit.rlim_cur; | |
578 | } | |
579 | #endif /* RLIMIT_FD_MAX */ | |
580 | return MAXCONNECTIONS; | |
581 | } | |
582 | ||
583 | static void | |
584 | ssl_process_accept_cb(rb_fde_t * F, int status, struct sockaddr *addr, rb_socklen_t len, void *data) | |
585 | { | |
586 | conn_t *conn = data; | |
587 | if(status == RB_OK) | |
588 | { | |
589 | conn_mod_read_cb(conn->mod_fd, conn); | |
590 | conn_plain_read_cb(conn->plain_fd, conn); | |
591 | return; | |
592 | } | |
593 | close_conn(conn, NO_WAIT, 0); | |
594 | return; | |
595 | } | |
596 | ||
597 | static void | |
598 | ssl_process_connect_cb(rb_fde_t * F, int status, void *data) | |
599 | { | |
600 | conn_t *conn = data; | |
601 | if(status == RB_OK) | |
602 | { | |
603 | conn_mod_read_cb(conn->mod_fd, conn); | |
604 | conn_plain_read_cb(conn->plain_fd, conn); | |
605 | return; | |
606 | } | |
607 | close_conn(conn, NO_WAIT, 0); | |
608 | return; | |
609 | } | |
610 | ||
611 | ||
612 | static void | |
613 | ssl_process_accept(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
614 | { | |
615 | conn_t *conn; | |
616 | rb_int32_t id; | |
617 | ||
618 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
619 | ||
620 | id = buf_to_int32(&ctlb->buf[1]); | |
621 | ||
622 | if(id >= 0) | |
623 | conn_add_id_hash(conn, id); | |
624 | SetSSL(conn); | |
625 | ||
626 | if(rb_get_type(conn->mod_fd) & RB_FD_UNKNOWN) | |
627 | { | |
628 | ||
629 | rb_set_type(conn->mod_fd, RB_FD_SOCKET); | |
630 | } | |
631 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
632 | rb_set_type(conn->plain_fd, RB_FD_SOCKET); | |
633 | ||
634 | rb_ssl_start_accepted(ctlb->F[0], ssl_process_accept_cb, conn, 10); | |
635 | } | |
636 | ||
637 | static void | |
638 | ssl_process_connect(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
639 | { | |
640 | conn_t *conn; | |
641 | rb_int32_t id; | |
642 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
643 | ||
644 | id = buf_to_int32(&ctlb->buf[1]); | |
645 | ||
646 | if(id >= 0) | |
647 | conn_add_id_hash(conn, id); | |
648 | SetSSL(conn); | |
649 | ||
650 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
651 | rb_set_type(conn->mod_fd, RB_FD_SOCKET); | |
652 | ||
653 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
654 | rb_set_type(conn->plain_fd, RB_FD_SOCKET); | |
655 | ||
656 | ||
657 | rb_ssl_start_connected(ctlb->F[0], ssl_process_connect_cb, conn, 10); | |
658 | } | |
659 | ||
660 | static void | |
661 | process_stats(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
662 | { | |
663 | char outstat[512]; | |
664 | conn_t *conn; | |
665 | const char *odata; | |
666 | rb_int32_t id; | |
667 | ||
668 | id = buf_to_int32(&ctlb->buf[1]); | |
669 | ||
670 | if(id < 0) | |
671 | return; | |
672 | ||
673 | odata = &ctlb->buf[5]; | |
674 | conn = conn_find_by_id(id); | |
675 | ||
676 | if(conn == NULL) | |
677 | return; | |
678 | ||
679 | rb_snprintf(outstat, sizeof(outstat), "S %s %llu %llu %llu %llu", odata, | |
680 | conn->plain_out, conn->mod_in, conn->plain_in, conn->mod_out); | |
681 | conn->plain_out = 0; | |
682 | conn->plain_in = 0; | |
683 | conn->mod_in = 0; | |
684 | conn->mod_out = 0; | |
685 | mod_cmd_write_queue(ctl, outstat, strlen(outstat) + 1); /* +1 is so we send the \0 as well */ | |
686 | } | |
687 | ||
688 | #ifdef HAVE_LIBZ | |
689 | static void | |
690 | zlib_send_zip_ready(mod_ctl_t *ctl, conn_t *conn) | |
691 | { | |
692 | char buf[5]; | |
693 | ||
694 | buf[0] = 'R'; | |
695 | int32_to_buf(&buf[1], conn->id); | |
696 | mod_cmd_write_queue(conn->ctl, buf, sizeof(buf)); | |
697 | } | |
698 | ||
699 | static void | |
700 | zlib_process(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
701 | { | |
702 | rb_uint8_t level; | |
703 | size_t recvqlen; | |
704 | size_t hdr = (sizeof(rb_uint8_t) * 2) + sizeof(rb_int32_t); | |
705 | void *recvq_start; | |
706 | z_stream *instream, *outstream; | |
707 | conn_t *conn; | |
708 | rb_int32_t id; | |
709 | ||
710 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
711 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
712 | rb_set_type(conn->mod_fd, RB_FD_SOCKET); | |
713 | ||
714 | if(rb_get_type(conn->plain_fd) == RB_FD_UNKNOWN) | |
715 | rb_set_type(conn->plain_fd, RB_FD_SOCKET); | |
716 | ||
717 | id = buf_to_int32(&ctlb->buf[1]); | |
718 | conn_add_id_hash(conn, id); | |
719 | ||
720 | level = (rb_uint8_t) ctlb->buf[5]; | |
721 | ||
722 | recvqlen = ctlb->buflen - hdr; | |
723 | recvq_start = &ctlb->buf[6]; | |
724 | ||
725 | SetZip(conn); | |
726 | conn->stream = rb_malloc(sizeof(zlib_stream_t)); | |
727 | instream = &((zlib_stream_t *)conn->stream)->instream; | |
728 | outstream = &((zlib_stream_t *)conn->stream)->outstream; | |
729 | ||
730 | instream->total_in = 0; | |
731 | instream->total_out = 0; | |
732 | instream->zalloc = (alloc_func) ssld_alloc; | |
733 | instream->zfree = (free_func) ssld_free; | |
734 | instream->data_type = Z_ASCII; | |
735 | inflateInit(&((zlib_stream_t *)conn->stream)->instream); | |
736 | ||
737 | outstream->total_in = 0; | |
738 | outstream->total_out = 0; | |
739 | outstream->zalloc = (alloc_func) ssld_alloc; | |
740 | outstream->zfree = (free_func) ssld_free; | |
741 | outstream->data_type = Z_ASCII; | |
742 | ||
743 | if(level > 9) | |
744 | level = Z_DEFAULT_COMPRESSION; | |
745 | ||
746 | deflateInit(&((zlib_stream_t *)conn->stream)->outstream, level); | |
747 | if(recvqlen > 0) | |
748 | common_zlib_inflate(conn, recvq_start, recvqlen); | |
749 | zlib_send_zip_ready(ctl, conn); | |
750 | conn_mod_read_cb(conn->mod_fd, conn); | |
751 | conn_plain_read_cb(conn->plain_fd, conn); | |
752 | return; | |
753 | ||
754 | } | |
755 | #endif | |
756 | ||
757 | static void | |
758 | init_prng(mod_ctl_t * ctl, mod_ctl_buf_t * ctl_buf) | |
759 | { | |
760 | char *path; | |
761 | prng_seed_t seed_type; | |
762 | ||
763 | seed_type = (prng_seed_t)ctl_buf->buf[1]; | |
764 | path = &ctl_buf->buf[2]; | |
765 | rb_init_prng(path, seed_type); | |
766 | } | |
767 | ||
768 | ||
769 | static void | |
770 | ssl_new_keys(mod_ctl_t * ctl, mod_ctl_buf_t * ctl_buf) | |
771 | { | |
772 | char *buf; | |
773 | char *cert, *key, *dhparam; | |
774 | ||
775 | buf = &ctl_buf->buf[2]; | |
776 | cert = buf; | |
777 | buf += strlen(cert) + 1; | |
778 | key = buf; | |
779 | buf += strlen(key) + 1; | |
780 | dhparam = buf; | |
781 | if(strlen(dhparam) == 0) | |
782 | dhparam = NULL; | |
783 | ||
784 | if(!rb_setup_ssl_server(cert, key, dhparam)) | |
785 | { | |
786 | const char *invalid = "I"; | |
787 | mod_cmd_write_queue(ctl, invalid, strlen(invalid)); | |
788 | return; | |
789 | } | |
790 | } | |
791 | ||
792 | static void | |
793 | send_nossl_support(mod_ctl_t *ctl, mod_ctl_buf_t *ctlb) | |
794 | { | |
795 | static const char *nossl_cmd = "N"; | |
796 | conn_t *conn; | |
797 | rb_int32_t id; | |
798 | ||
799 | if(ctlb != NULL) | |
800 | { | |
801 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
802 | id = buf_to_int32(&ctlb->buf[1]); | |
803 | ||
804 | if(id >= 0) | |
805 | conn_add_id_hash(conn, id); | |
806 | close_conn(conn, WAIT_PLAIN, "libratbox reports no SSL/TLS support"); | |
807 | } | |
808 | mod_cmd_write_queue(ctl, nossl_cmd, strlen(nossl_cmd)); | |
809 | } | |
810 | ||
811 | static void | |
812 | send_i_am_useless(mod_ctl_t *ctl) | |
813 | { | |
814 | static const char *useless = "U"; | |
815 | mod_cmd_write_queue(ctl, useless, strlen(useless)); | |
816 | } | |
817 | ||
818 | static void | |
819 | send_nozlib_support(mod_ctl_t *ctl, mod_ctl_buf_t *ctlb) | |
820 | { | |
821 | static const char *nozlib_cmd = "z"; | |
822 | conn_t *conn; | |
823 | rb_int32_t id; | |
824 | if(ctlb != NULL) | |
825 | { | |
826 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
827 | id = buf_to_int32(&ctlb->buf[1]); | |
828 | ||
829 | if(id >= 0) | |
830 | conn_add_id_hash(conn, id); | |
831 | close_conn(conn, WAIT_PLAIN, "libratbox reports no zlib support"); | |
832 | } | |
833 | mod_cmd_write_queue(ctl, nozlib_cmd, strlen(nozlib_cmd)); | |
834 | } | |
835 | ||
836 | static void | |
837 | mod_process_cmd_recv(mod_ctl_t * ctl) | |
838 | { | |
839 | rb_dlink_node *ptr, *next; | |
840 | mod_ctl_buf_t *ctl_buf; | |
841 | ||
842 | RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head) | |
843 | { | |
844 | ctl_buf = ptr->data; | |
845 | ||
846 | switch (*ctl_buf->buf) | |
847 | { | |
848 | case 'A': | |
849 | { | |
850 | if(!ssl_ok) | |
851 | { | |
852 | send_nossl_support(ctl, ctl_buf); | |
853 | break; | |
854 | } | |
855 | ssl_process_accept(ctl, ctl_buf); | |
856 | break; | |
857 | } | |
858 | case 'C': | |
859 | { | |
860 | if(!ssl_ok) | |
861 | { | |
862 | send_nossl_support(ctl, ctl_buf); | |
863 | break; | |
864 | } | |
865 | ssl_process_connect(ctl, ctl_buf); | |
866 | break; | |
867 | } | |
868 | ||
869 | case 'K': | |
870 | { | |
871 | if(!ssl_ok) | |
872 | { | |
873 | send_nossl_support(ctl, ctl_buf); | |
874 | break; | |
875 | } | |
876 | ssl_new_keys(ctl, ctl_buf); | |
877 | break; | |
878 | } | |
879 | case 'I': | |
880 | init_prng(ctl, ctl_buf); | |
881 | break; | |
882 | case 'S': | |
883 | { | |
884 | process_stats(ctl, ctl_buf); | |
885 | break; | |
886 | } | |
887 | #ifdef HAVE_LIBZ | |
888 | case 'Z': | |
889 | { | |
890 | /* just zlib only */ | |
891 | zlib_process(ctl, ctl_buf); | |
892 | break; | |
893 | } | |
894 | #else | |
895 | case 'Y': | |
896 | case 'Z': | |
897 | send_nozlib_support(ctl); | |
898 | break; | |
899 | ||
900 | #endif | |
901 | default: | |
902 | break; | |
903 | /* Log unknown commands */ | |
904 | } | |
905 | rb_dlinkDelete(ptr, &ctl->readq); | |
906 | rb_free(ctl_buf->buf); | |
907 | rb_free(ctl_buf); | |
908 | } | |
909 | ||
910 | } | |
911 | ||
912 | ||
913 | ||
914 | static void | |
915 | mod_read_ctl(rb_fde_t * F, void *data) | |
916 | { | |
917 | mod_ctl_buf_t *ctl_buf; | |
918 | mod_ctl_t *ctl = data; | |
919 | int retlen; | |
920 | ||
921 | do | |
922 | { | |
923 | ctl_buf = rb_malloc(sizeof(mod_ctl_buf_t)); | |
924 | ctl_buf->buf = rb_malloc(READBUF_SIZE); | |
925 | ctl_buf->buflen = READBUF_SIZE; | |
926 | retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, ctl_buf->buflen, ctl_buf->F, | |
927 | MAXPASSFD); | |
928 | if(retlen <= 0) | |
929 | { | |
930 | rb_free(ctl_buf->buf); | |
931 | rb_free(ctl_buf); | |
932 | } | |
933 | else | |
934 | { | |
935 | ctl_buf->buflen = retlen; | |
936 | rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq); | |
937 | } | |
938 | } | |
939 | while (retlen > 0); | |
940 | ||
941 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
942 | exit(0); | |
943 | ||
944 | mod_process_cmd_recv(ctl); | |
945 | rb_setselect(ctl->F, RB_SELECT_READ, mod_read_ctl, ctl); | |
946 | } | |
947 | ||
948 | static void | |
949 | mod_write_ctl(rb_fde_t * F, void *data) | |
950 | { | |
951 | mod_ctl_t *ctl = data; | |
952 | mod_ctl_buf_t *ctl_buf; | |
953 | rb_dlink_node *ptr, *next; | |
954 | int retlen, x; | |
955 | ||
956 | RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head) | |
957 | { | |
958 | ctl_buf = ptr->data; | |
959 | retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, | |
960 | ctl_buf->buflen); | |
961 | if(retlen > 0) | |
962 | { | |
963 | rb_dlinkDelete(ptr, &ctl->writeq); | |
964 | for (x = 0; x < ctl_buf->nfds; x++) | |
965 | rb_close(ctl_buf->F[x]); | |
966 | rb_free(ctl_buf->buf); | |
967 | rb_free(ctl_buf); | |
968 | ||
969 | } | |
970 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
971 | exit(0); | |
972 | ||
973 | rb_setselect(ctl->F, RB_SELECT_WRITE, mod_write_ctl, ctl); | |
974 | } | |
975 | } | |
976 | ||
977 | ||
978 | static void | |
979 | read_pipe_ctl(rb_fde_t * F, void *data) | |
980 | { | |
981 | int retlen; | |
982 | while ((retlen = rb_read(F, inbuf, sizeof(inbuf))) > 0) | |
983 | { | |
984 | ;; /* we don't do anything with the pipe really, just care if the other process dies.. */ | |
985 | } | |
986 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
987 | exit(0); | |
988 | rb_setselect(F, RB_SELECT_READ, read_pipe_ctl, NULL); | |
989 | ||
990 | } | |
991 | ||
992 | int | |
993 | main(int argc, char **argv) | |
994 | { | |
995 | const char *s_ctlfd, *s_pipe; | |
996 | int ctlfd, pipefd, x, maxfd; | |
997 | maxfd = maxconn(); | |
998 | s_ctlfd = getenv("CTL_FD"); | |
999 | s_pipe = getenv("CTL_PIPE"); | |
1000 | ||
1001 | if(s_ctlfd == NULL || s_pipe == NULL) | |
1002 | { | |
1003 | fprintf(stderr, "This is ircd-ratbox ssld. You know you aren't supposed to run me directly?\n"); | |
1004 | fprintf(stderr, "You get an Id tag for this: $Id: ssld.c 25179 2008-03-30 16:34:57Z androsyn $\n"); | |
1005 | fprintf(stderr, "Have a nice life\n"); | |
1006 | exit(1); | |
1007 | } | |
1008 | ||
1009 | ctlfd = atoi(s_ctlfd); | |
1010 | pipefd = atoi(s_pipe); | |
1011 | ||
1012 | for (x = 0; x < maxfd; x++) | |
1013 | { | |
1014 | if(x != ctlfd && x != pipefd && x > 2) | |
1015 | close(x); | |
1016 | } | |
1017 | ||
1018 | #if 0 | |
1019 | x = open("/dev/null", O_RDWR); | |
1020 | if(x >= 0) | |
1021 | { | |
1022 | if(ctlfd != 0 && pipefd != 0) | |
1023 | dup2(x, 0); | |
1024 | if(ctlfd != 1 && pipefd != 1) | |
1025 | dup2(x, 1); | |
1026 | if(ctlfd != 2 && pipefd != 2) | |
1027 | dup2(x, 2); | |
1028 | if(x > 2) | |
1029 | close(x); | |
1030 | } | |
1031 | #endif | |
1032 | setup_signals(); | |
1033 | rb_lib_init(NULL, NULL, NULL, 0, maxfd, 1024, 4096); | |
1034 | rb_init_rawbuffers(1024); | |
1035 | ssl_ok = rb_supports_ssl(); | |
1036 | ||
1037 | mod_ctl = rb_malloc(sizeof(mod_ctl_t)); | |
1038 | mod_ctl->F = rb_open(ctlfd, RB_FD_SOCKET, "ircd control socket"); | |
1039 | mod_ctl->F_pipe = rb_open(pipefd, RB_FD_PIPE, "ircd pipe"); | |
1040 | rb_set_nb(mod_ctl->F); | |
1041 | rb_set_nb(mod_ctl->F_pipe); | |
1042 | rb_event_addish("clean_dead_conns", clean_dead_conns, NULL, 10); | |
1043 | read_pipe_ctl(mod_ctl->F_pipe, NULL); | |
1044 | mod_read_ctl(mod_ctl->F, mod_ctl); | |
1045 | if(!zlib_ok && !ssl_ok) | |
1046 | { | |
1047 | /* this is really useless... */ | |
1048 | send_i_am_useless(mod_ctl); | |
1049 | /* sleep until the ircd kills us */ | |
1050 | rb_sleep(2<<30, 0); | |
1051 | exit(1); | |
1052 | } | |
1053 | ||
1054 | if(!zlib_ok) | |
1055 | send_nozlib_support(mod_ctl, NULL); | |
1056 | if(!ssl_ok) | |
1057 | send_nossl_support(mod_ctl, NULL); | |
1058 | rb_lib_loop(0); | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | ||
1063 | ||
1064 | static void | |
1065 | dummy_handler(int sig) | |
1066 | { | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | static void | |
1071 | setup_signals() | |
1072 | { | |
1073 | struct sigaction act; | |
1074 | ||
1075 | act.sa_flags = 0; | |
1076 | act.sa_handler = SIG_IGN; | |
1077 | sigemptyset(&act.sa_mask); | |
1078 | sigaddset(&act.sa_mask, SIGPIPE); | |
1079 | sigaddset(&act.sa_mask, SIGALRM); | |
1080 | #ifdef SIGTRAP | |
1081 | sigaddset(&act.sa_mask, SIGTRAP); | |
1082 | #endif | |
1083 | ||
1084 | #ifdef SIGWINCH | |
1085 | sigaddset(&act.sa_mask, SIGWINCH); | |
1086 | sigaction(SIGWINCH, &act, 0); | |
1087 | #endif | |
1088 | sigaction(SIGPIPE, &act, 0); | |
1089 | #ifdef SIGTRAP | |
1090 | sigaction(SIGTRAP, &act, 0); | |
1091 | #endif | |
1092 | ||
1093 | act.sa_handler = dummy_handler; | |
1094 | sigaction(SIGALRM, &act, 0); | |
1095 | } | |
1096 |