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8d99443b VY |
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 | * | |
3202e249 | 21 | * $Id$ |
8d99443b VY |
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); | |
3202e249 | 37 | static pid_t ppid; |
8d99443b | 38 | |
3202e249 VY |
39 | static inline int32_t |
40 | buf_to_int32(char *buf) | |
8d99443b | 41 | { |
7edb4f16 | 42 | int32_t x; |
4b6a4d47 | 43 | memcpy(&x, buf, sizeof(x)); |
8d99443b VY |
44 | return x; |
45 | } | |
46 | ||
3202e249 VY |
47 | static inline void |
48 | int32_to_buf(char *buf, int32_t x) | |
8d99443b | 49 | { |
4b6a4d47 | 50 | memcpy(buf, &x, sizeof(x)); |
8d99443b VY |
51 | return; |
52 | } | |
53 | ||
3202e249 VY |
54 | static inline uint16_t |
55 | buf_to_uint16(char *buf) | |
8d99443b | 56 | { |
7edb4f16 | 57 | uint16_t x; |
4b6a4d47 | 58 | memcpy(&x, buf, sizeof(x)); |
8d99443b VY |
59 | return x; |
60 | } | |
61 | ||
3202e249 VY |
62 | static inline void |
63 | uint16_to_buf(char *buf, uint16_t x) | |
8d99443b | 64 | { |
4b6a4d47 | 65 | memcpy(buf, &x, sizeof(x)); |
8d99443b VY |
66 | return; |
67 | } | |
3202e249 | 68 | |
8d99443b | 69 | |
8d99443b | 70 | static char inbuf[READBUF_SIZE]; |
4b6a4d47 | 71 | #ifdef HAVE_LIBZ |
8d99443b | 72 | static char outbuf[READBUF_SIZE]; |
4b6a4d47 | 73 | #endif |
8d99443b VY |
74 | |
75 | typedef struct _mod_ctl_buf | |
76 | { | |
77 | rb_dlink_node node; | |
78 | char *buf; | |
79 | size_t buflen; | |
80 | rb_fde_t *F[MAXPASSFD]; | |
81 | int nfds; | |
82 | } mod_ctl_buf_t; | |
83 | ||
84 | typedef struct _mod_ctl | |
85 | { | |
86 | rb_dlink_node node; | |
87 | int cli_count; | |
88 | rb_fde_t *F; | |
89 | rb_fde_t *F_pipe; | |
90 | rb_dlink_list readq; | |
91 | rb_dlink_list writeq; | |
92 | } mod_ctl_t; | |
93 | ||
94 | static mod_ctl_t *mod_ctl; | |
95 | ||
96 | ||
97 | #ifdef HAVE_LIBZ | |
98 | typedef struct _zlib_stream | |
99 | { | |
100 | z_stream instream; | |
101 | z_stream outstream; | |
102 | } zlib_stream_t; | |
103 | #endif | |
104 | ||
105 | typedef struct _conn | |
106 | { | |
107 | rb_dlink_node node; | |
108 | mod_ctl_t *ctl; | |
109 | rawbuf_head_t *modbuf_out; | |
110 | rawbuf_head_t *plainbuf_out; | |
111 | ||
7edb4f16 | 112 | int32_t id; |
8d99443b VY |
113 | |
114 | rb_fde_t *mod_fd; | |
115 | rb_fde_t *plain_fd; | |
116 | unsigned long long mod_out; | |
117 | unsigned long long mod_in; | |
118 | unsigned long long plain_in; | |
119 | unsigned long long plain_out; | |
7edb4f16 | 120 | uint8_t flags; |
8d99443b VY |
121 | void *stream; |
122 | } conn_t; | |
123 | ||
124 | #define FLAG_SSL 0x01 | |
125 | #define FLAG_ZIP 0x02 | |
126 | #define FLAG_CORK 0x04 | |
127 | #define FLAG_DEAD 0x08 | |
3202e249 VY |
128 | #define FLAG_SSL_W_WANTS_R 0x10 /* output needs to wait until input possible */ |
129 | #define FLAG_SSL_R_WANTS_W 0x20 /* input needs to wait until output possible */ | |
07c2bb75 | 130 | #define FLAG_ZIPSSL 0x40 |
8d99443b VY |
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) | |
73d6283c VY |
136 | #define IsSSLWWantsR(x) ((x)->flags & FLAG_SSL_W_WANTS_R) |
137 | #define IsSSLRWantsW(x) ((x)->flags & FLAG_SSL_R_WANTS_W) | |
07c2bb75 | 138 | #define IsZipSSL(x) ((x)->flags & FLAG_ZIPSSL) |
8d99443b VY |
139 | |
140 | #define SetSSL(x) ((x)->flags |= FLAG_SSL) | |
141 | #define SetZip(x) ((x)->flags |= FLAG_ZIP) | |
142 | #define SetCork(x) ((x)->flags |= FLAG_CORK) | |
143 | #define SetDead(x) ((x)->flags |= FLAG_DEAD) | |
73d6283c VY |
144 | #define SetSSLWWantsR(x) ((x)->flags |= FLAG_SSL_W_WANTS_R) |
145 | #define SetSSLRWantsW(x) ((x)->flags |= FLAG_SSL_R_WANTS_W) | |
07c2bb75 | 146 | #define SetZipSSL(x) ((x)->flags |= FLAG_ZIPSSL) |
8d99443b VY |
147 | |
148 | #define ClearSSL(x) ((x)->flags &= ~FLAG_SSL) | |
149 | #define ClearZip(x) ((x)->flags &= ~FLAG_ZIP) | |
150 | #define ClearCork(x) ((x)->flags &= ~FLAG_CORK) | |
151 | #define ClearDead(x) ((x)->flags &= ~FLAG_DEAD) | |
73d6283c VY |
152 | #define ClearSSLWWantsR(x) ((x)->flags &= ~FLAG_SSL_W_WANTS_R) |
153 | #define ClearSSLRWantsW(x) ((x)->flags &= ~FLAG_SSL_R_WANTS_W) | |
07c2bb75 | 154 | #define ClearZipSSL(x) ((x)->flags &= ~FLAG_ZIPSSL) |
8d99443b VY |
155 | |
156 | #define NO_WAIT 0x0 | |
157 | #define WAIT_PLAIN 0x1 | |
158 | ||
4b6a4d47 VY |
159 | #define HASH_WALK_SAFE(i, max, ptr, next, table) for(i = 0; i < max; i++) { RB_DLINK_FOREACH_SAFE(ptr, next, table[i].head) |
160 | #define HASH_WALK_END } | |
8d99443b VY |
161 | #define CONN_HASH_SIZE 2000 |
162 | #define connid_hash(x) (&connid_hash_table[(x % CONN_HASH_SIZE)]) | |
163 | ||
4b6a4d47 VY |
164 | |
165 | ||
8d99443b VY |
166 | static rb_dlink_list connid_hash_table[CONN_HASH_SIZE]; |
167 | static rb_dlink_list dead_list; | |
168 | ||
3202e249 | 169 | static void conn_mod_read_cb(rb_fde_t *fd, void *data); |
8d99443b VY |
170 | static void conn_mod_write_sendq(rb_fde_t *, void *data); |
171 | static void conn_plain_write_sendq(rb_fde_t *, void *data); | |
172 | static void mod_write_ctl(rb_fde_t *, void *data); | |
3202e249 | 173 | static void conn_plain_read_cb(rb_fde_t *fd, void *data); |
e99f6122 | 174 | static void conn_plain_read_shutdown_cb(rb_fde_t *fd, void *data); |
3202e249 | 175 | static void mod_cmd_write_queue(mod_ctl_t * ctl, const void *data, size_t len); |
8d99443b VY |
176 | static const char *remote_closed = "Remote host closed the connection"; |
177 | static int ssl_ok; | |
178 | #ifdef HAVE_LIBZ | |
179 | static int zlib_ok = 1; | |
180 | #else | |
181 | static int zlib_ok = 0; | |
182 | #endif | |
4b6a4d47 VY |
183 | |
184 | ||
185 | #ifdef HAVE_LIBZ | |
8d99443b VY |
186 | static void * |
187 | ssld_alloc(void *unused, size_t count, size_t size) | |
188 | { | |
189 | return rb_malloc(count * size); | |
190 | } | |
191 | ||
192 | static void | |
193 | ssld_free(void *unused, void *ptr) | |
194 | { | |
3202e249 | 195 | rb_free(ptr); |
8d99443b | 196 | } |
4b6a4d47 | 197 | #endif |
8d99443b VY |
198 | |
199 | static conn_t * | |
7edb4f16 | 200 | conn_find_by_id(int32_t id) |
8d99443b VY |
201 | { |
202 | rb_dlink_node *ptr; | |
203 | conn_t *conn; | |
204 | ||
205 | RB_DLINK_FOREACH(ptr, (connid_hash(id))->head) | |
206 | { | |
207 | conn = ptr->data; | |
208 | if(conn->id == id && !IsDead(conn)) | |
209 | return conn; | |
210 | } | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | static void | |
7edb4f16 | 215 | conn_add_id_hash(conn_t * conn, int32_t id) |
8d99443b VY |
216 | { |
217 | conn->id = id; | |
218 | rb_dlinkAdd(conn, &conn->node, connid_hash(id)); | |
219 | } | |
220 | ||
221 | static void | |
222 | free_conn(conn_t * conn) | |
223 | { | |
224 | rb_free_rawbuffer(conn->modbuf_out); | |
225 | rb_free_rawbuffer(conn->plainbuf_out); | |
4b6a4d47 | 226 | #ifdef HAVE_LIBZ |
8d99443b VY |
227 | if(IsZip(conn)) |
228 | { | |
229 | zlib_stream_t *stream = conn->stream; | |
230 | inflateEnd(&stream->instream); | |
3202e249 | 231 | deflateEnd(&stream->outstream); |
8d99443b | 232 | } |
4b6a4d47 | 233 | #endif |
8d99443b VY |
234 | rb_free(conn); |
235 | } | |
236 | ||
237 | static void | |
238 | clean_dead_conns(void *unused) | |
239 | { | |
240 | conn_t *conn; | |
241 | rb_dlink_node *ptr, *next; | |
242 | RB_DLINK_FOREACH_SAFE(ptr, next, dead_list.head) | |
243 | { | |
244 | conn = ptr->data; | |
245 | free_conn(conn); | |
246 | } | |
247 | dead_list.tail = dead_list.head = NULL; | |
248 | } | |
249 | ||
250 | ||
251 | static void | |
252 | close_conn(conn_t * conn, int wait_plain, const char *fmt, ...) | |
253 | { | |
254 | va_list ap; | |
3202e249 | 255 | char reason[128]; /* must always be under 250 bytes */ |
8d99443b VY |
256 | char buf[256]; |
257 | int len; | |
258 | if(IsDead(conn)) | |
259 | return; | |
3202e249 | 260 | |
8d99443b VY |
261 | rb_rawbuf_flush(conn->modbuf_out, conn->mod_fd); |
262 | rb_rawbuf_flush(conn->plainbuf_out, conn->plain_fd); | |
263 | rb_close(conn->mod_fd); | |
264 | SetDead(conn); | |
265 | ||
e99f6122 JT |
266 | if(conn->id >= 0 && !IsZipSSL(conn)) |
267 | rb_dlinkDelete(&conn->node, connid_hash(conn->id)); | |
268 | ||
8d99443b VY |
269 | if(!wait_plain || fmt == NULL) |
270 | { | |
271 | rb_close(conn->plain_fd); | |
8d99443b VY |
272 | rb_dlinkAdd(conn, &conn->node, &dead_list); |
273 | return; | |
274 | } | |
e99f6122 JT |
275 | rb_setselect(conn->plain_fd, RB_SELECT_READ, conn_plain_read_shutdown_cb, conn); |
276 | rb_setselect(conn->plain_fd, RB_SELECT_WRITE, NULL, NULL); | |
8d99443b VY |
277 | va_start(ap, fmt); |
278 | rb_vsnprintf(reason, sizeof(reason), fmt, ap); | |
279 | va_end(ap); | |
280 | ||
281 | buf[0] = 'D'; | |
282 | int32_to_buf(&buf[1], conn->id); | |
283 | strcpy(&buf[5], reason); | |
284 | len = (strlen(reason) + 1) + 5; | |
285 | mod_cmd_write_queue(conn->ctl, buf, len); | |
286 | } | |
287 | ||
288 | static conn_t * | |
3202e249 | 289 | make_conn(mod_ctl_t * ctl, rb_fde_t *mod_fd, rb_fde_t *plain_fd) |
8d99443b VY |
290 | { |
291 | conn_t *conn = rb_malloc(sizeof(conn_t)); | |
292 | conn->ctl = ctl; | |
293 | conn->modbuf_out = rb_new_rawbuffer(); | |
294 | conn->plainbuf_out = rb_new_rawbuffer(); | |
295 | conn->mod_fd = mod_fd; | |
296 | conn->plain_fd = plain_fd; | |
297 | conn->id = -1; | |
298 | conn->stream = NULL; | |
299 | rb_set_nb(mod_fd); | |
300 | rb_set_nb(plain_fd); | |
301 | return conn; | |
302 | } | |
303 | ||
4b6a4d47 VY |
304 | static void |
305 | check_handshake_flood(void *unused) | |
306 | { | |
307 | conn_t *conn; | |
308 | rb_dlink_node *ptr, *next; | |
309 | unsigned int count; | |
310 | int i; | |
311 | HASH_WALK_SAFE(i, CONN_HASH_SIZE, ptr, next, connid_hash_table) | |
312 | { | |
313 | conn = ptr->data; | |
314 | if(!IsSSL(conn)) | |
315 | continue; | |
3202e249 | 316 | |
4b6a4d47 VY |
317 | count = rb_ssl_handshake_count(conn->mod_fd); |
318 | /* nothing needs to do this more than twice in ten seconds i don't think */ | |
319 | if(count > 2) | |
320 | close_conn(conn, WAIT_PLAIN, "Handshake flooding"); | |
321 | else | |
322 | rb_ssl_clear_handshake_count(conn->mod_fd); | |
3202e249 VY |
323 | } |
324 | HASH_WALK_END} | |
4b6a4d47 | 325 | |
8d99443b | 326 | static void |
3202e249 | 327 | conn_mod_write_sendq(rb_fde_t *fd, void *data) |
8d99443b VY |
328 | { |
329 | conn_t *conn = data; | |
330 | const char *err; | |
331 | int retlen; | |
332 | if(IsDead(conn)) | |
333 | return; | |
334 | ||
73d6283c VY |
335 | if(IsSSLWWantsR(conn)) |
336 | { | |
337 | ClearSSLWWantsR(conn); | |
338 | conn_mod_read_cb(conn->mod_fd, conn); | |
339 | if(IsDead(conn)) | |
340 | return; | |
341 | } | |
342 | ||
3202e249 | 343 | while((retlen = rb_rawbuf_flush(conn->modbuf_out, fd)) > 0) |
8d99443b VY |
344 | conn->mod_out += retlen; |
345 | ||
346 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
347 | { | |
348 | if(retlen == 0) | |
349 | close_conn(conn, WAIT_PLAIN, "%s", remote_closed); | |
350 | if(IsSSL(conn) && retlen == RB_RW_SSL_ERROR) | |
351 | err = rb_get_ssl_strerror(conn->mod_fd); | |
352 | else | |
353 | err = strerror(errno); | |
354 | close_conn(conn, WAIT_PLAIN, "Write error: %s", err); | |
355 | return; | |
356 | } | |
357 | if(rb_rawbuf_length(conn->modbuf_out) > 0) | |
358 | { | |
73d6283c VY |
359 | if(retlen != RB_RW_SSL_NEED_READ) |
360 | rb_setselect(conn->mod_fd, RB_SELECT_WRITE, conn_mod_write_sendq, conn); | |
361 | else | |
362 | { | |
363 | rb_setselect(conn->mod_fd, RB_SELECT_READ, conn_mod_write_sendq, conn); | |
364 | rb_setselect(conn->mod_fd, RB_SELECT_WRITE, NULL, NULL); | |
365 | SetSSLWWantsR(conn); | |
366 | } | |
8d99443b VY |
367 | } |
368 | else | |
369 | rb_setselect(conn->mod_fd, RB_SELECT_WRITE, NULL, NULL); | |
370 | ||
371 | if(IsCork(conn) && rb_rawbuf_length(conn->modbuf_out) == 0) | |
372 | { | |
373 | ClearCork(conn); | |
374 | conn_plain_read_cb(conn->plain_fd, conn); | |
375 | } | |
376 | ||
377 | } | |
378 | ||
379 | static void | |
380 | conn_mod_write(conn_t * conn, void *data, size_t len) | |
381 | { | |
382 | if(IsDead(conn)) /* no point in queueing to a dead man */ | |
383 | return; | |
384 | rb_rawbuf_append(conn->modbuf_out, data, len); | |
385 | } | |
386 | ||
387 | static void | |
388 | conn_plain_write(conn_t * conn, void *data, size_t len) | |
389 | { | |
390 | if(IsDead(conn)) /* again no point in queueing to dead men */ | |
391 | return; | |
392 | rb_rawbuf_append(conn->plainbuf_out, data, len); | |
393 | } | |
394 | ||
395 | static void | |
396 | mod_cmd_write_queue(mod_ctl_t * ctl, const void *data, size_t len) | |
397 | { | |
398 | mod_ctl_buf_t *ctl_buf; | |
399 | ctl_buf = rb_malloc(sizeof(mod_ctl_buf_t)); | |
400 | ctl_buf->buf = rb_malloc(len); | |
401 | ctl_buf->buflen = len; | |
402 | memcpy(ctl_buf->buf, data, len); | |
403 | ctl_buf->nfds = 0; | |
404 | rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq); | |
405 | mod_write_ctl(ctl->F, ctl); | |
406 | } | |
407 | ||
408 | #ifdef HAVE_LIBZ | |
409 | static void | |
410 | common_zlib_deflate(conn_t * conn, void *buf, size_t len) | |
411 | { | |
412 | int ret, have; | |
3202e249 | 413 | z_stream *outstream = &((zlib_stream_t *) conn->stream)->outstream; |
8d99443b VY |
414 | outstream->next_in = buf; |
415 | outstream->avail_in = len; | |
416 | outstream->next_out = (Bytef *) outbuf; | |
417 | outstream->avail_out = sizeof(outbuf); | |
418 | ||
419 | ret = deflate(outstream, Z_SYNC_FLUSH); | |
420 | if(ret != Z_OK) | |
421 | { | |
422 | /* deflate error */ | |
423 | close_conn(conn, WAIT_PLAIN, "Deflate failed: %s", zError(ret)); | |
424 | return; | |
425 | } | |
426 | if(outstream->avail_out == 0) | |
427 | { | |
428 | /* avail_out empty */ | |
429 | close_conn(conn, WAIT_PLAIN, "error compressing data, avail_out == 0"); | |
430 | return; | |
431 | } | |
432 | if(outstream->avail_in != 0) | |
433 | { | |
3202e249 | 434 | /* avail_in isn't empty... */ |
8d99443b VY |
435 | close_conn(conn, WAIT_PLAIN, "error compressing data, avail_in != 0"); |
436 | return; | |
437 | } | |
438 | have = sizeof(outbuf) - outstream->avail_out; | |
439 | conn_mod_write(conn, outbuf, have); | |
440 | } | |
441 | ||
442 | static void | |
443 | common_zlib_inflate(conn_t * conn, void *buf, size_t len) | |
444 | { | |
3202e249 VY |
445 | int ret, have = 0; |
446 | ((zlib_stream_t *) conn->stream)->instream.next_in = buf; | |
447 | ((zlib_stream_t *) conn->stream)->instream.avail_in = len; | |
448 | ((zlib_stream_t *) conn->stream)->instream.next_out = (Bytef *) outbuf; | |
449 | ((zlib_stream_t *) conn->stream)->instream.avail_out = sizeof(outbuf); | |
8d99443b | 450 | |
3202e249 | 451 | while(((zlib_stream_t *) conn->stream)->instream.avail_in) |
8d99443b | 452 | { |
3202e249 | 453 | ret = inflate(&((zlib_stream_t *) conn->stream)->instream, Z_NO_FLUSH); |
8d99443b VY |
454 | if(ret != Z_OK) |
455 | { | |
456 | if(!strncmp("ERROR ", buf, 6)) | |
457 | { | |
458 | close_conn(conn, WAIT_PLAIN, "Received uncompressed ERROR"); | |
459 | return; | |
460 | } | |
461 | close_conn(conn, WAIT_PLAIN, "Inflate failed: %s", zError(ret)); | |
462 | return; | |
463 | } | |
3202e249 | 464 | have = sizeof(outbuf) - ((zlib_stream_t *) conn->stream)->instream.avail_out; |
8d99443b | 465 | |
3202e249 | 466 | if(((zlib_stream_t *) conn->stream)->instream.avail_in) |
8d99443b VY |
467 | { |
468 | conn_plain_write(conn, outbuf, have); | |
469 | have = 0; | |
3202e249 VY |
470 | ((zlib_stream_t *) conn->stream)->instream.next_out = (Bytef *) outbuf; |
471 | ((zlib_stream_t *) conn->stream)->instream.avail_out = sizeof(outbuf); | |
8d99443b VY |
472 | } |
473 | } | |
474 | if(have == 0) | |
475 | return; | |
476 | ||
477 | conn_plain_write(conn, outbuf, have); | |
478 | } | |
479 | #endif | |
480 | ||
481 | static int | |
482 | plain_check_cork(conn_t * conn) | |
483 | { | |
484 | if(rb_rawbuf_length(conn->modbuf_out) >= 4096) | |
485 | { | |
486 | /* if we have over 4k pending outbound, don't read until | |
487 | * we've cleared the queue */ | |
488 | SetCork(conn); | |
489 | rb_setselect(conn->plain_fd, RB_SELECT_READ, NULL, NULL); | |
490 | /* try to write */ | |
491 | conn_mod_write_sendq(conn->mod_fd, conn); | |
492 | return 1; | |
493 | } | |
494 | return 0; | |
495 | } | |
496 | ||
497 | ||
498 | static void | |
3202e249 | 499 | conn_plain_read_cb(rb_fde_t *fd, void *data) |
8d99443b VY |
500 | { |
501 | conn_t *conn = data; | |
502 | int length = 0; | |
503 | if(conn == NULL) | |
504 | return; | |
505 | ||
506 | if(IsDead(conn)) | |
507 | return; | |
508 | ||
509 | if(plain_check_cork(conn)) | |
510 | return; | |
511 | ||
3202e249 | 512 | while(1) |
8d99443b VY |
513 | { |
514 | if(IsDead(conn)) | |
515 | return; | |
516 | ||
517 | length = rb_read(conn->plain_fd, inbuf, sizeof(inbuf)); | |
518 | ||
519 | if(length == 0 || (length < 0 && !rb_ignore_errno(errno))) | |
520 | { | |
521 | close_conn(conn, NO_WAIT, NULL); | |
522 | return; | |
523 | } | |
524 | ||
525 | if(length < 0) | |
526 | { | |
527 | rb_setselect(conn->plain_fd, RB_SELECT_READ, conn_plain_read_cb, conn); | |
528 | conn_mod_write_sendq(conn->mod_fd, conn); | |
529 | return; | |
530 | } | |
531 | conn->plain_in += length; | |
532 | ||
533 | #ifdef HAVE_LIBZ | |
534 | if(IsZip(conn)) | |
535 | common_zlib_deflate(conn, inbuf, length); | |
536 | else | |
537 | #endif | |
538 | conn_mod_write(conn, inbuf, length); | |
539 | if(IsDead(conn)) | |
540 | return; | |
541 | if(plain_check_cork(conn)) | |
542 | return; | |
543 | } | |
544 | } | |
545 | ||
e99f6122 JT |
546 | static void |
547 | conn_plain_read_shutdown_cb(rb_fde_t *fd, void *data) | |
548 | { | |
549 | conn_t *conn = data; | |
550 | int length = 0; | |
551 | ||
552 | if(conn == NULL) | |
553 | return; | |
554 | ||
555 | while(1) | |
556 | { | |
557 | length = rb_read(conn->plain_fd, inbuf, sizeof(inbuf)); | |
558 | ||
559 | if(length == 0 || (length < 0 && !rb_ignore_errno(errno))) | |
560 | { | |
561 | rb_close(conn->plain_fd); | |
562 | rb_dlinkAdd(conn, &conn->node, &dead_list); | |
563 | return; | |
564 | } | |
565 | ||
566 | if(length < 0) | |
567 | { | |
568 | rb_setselect(conn->plain_fd, RB_SELECT_READ, conn_plain_read_shutdown_cb, conn); | |
569 | return; | |
570 | } | |
571 | } | |
572 | } | |
573 | ||
8d99443b | 574 | static void |
3202e249 | 575 | conn_mod_read_cb(rb_fde_t *fd, void *data) |
8d99443b VY |
576 | { |
577 | conn_t *conn = data; | |
578 | const char *err = remote_closed; | |
579 | int length; | |
580 | if(conn == NULL) | |
581 | return; | |
582 | if(IsDead(conn)) | |
583 | return; | |
584 | ||
73d6283c VY |
585 | if(IsSSLRWantsW(conn)) |
586 | { | |
587 | ClearSSLRWantsW(conn); | |
588 | conn_mod_write_sendq(conn->mod_fd, conn); | |
589 | if(IsDead(conn)) | |
590 | return; | |
591 | } | |
592 | ||
3202e249 | 593 | while(1) |
8d99443b VY |
594 | { |
595 | if(IsDead(conn)) | |
596 | return; | |
597 | ||
598 | length = rb_read(conn->mod_fd, inbuf, sizeof(inbuf)); | |
599 | ||
600 | if(length == 0 || (length < 0 && !rb_ignore_errno(errno))) | |
601 | { | |
3202e249 VY |
602 | if(length == 0) |
603 | { | |
8d99443b VY |
604 | close_conn(conn, WAIT_PLAIN, "%s", remote_closed); |
605 | return; | |
606 | } | |
607 | ||
608 | if(IsSSL(conn) && length == RB_RW_SSL_ERROR) | |
609 | err = rb_get_ssl_strerror(conn->mod_fd); | |
610 | else | |
611 | err = strerror(errno); | |
612 | close_conn(conn, WAIT_PLAIN, "Read error: %s", err); | |
613 | return; | |
614 | } | |
615 | if(length < 0) | |
616 | { | |
73d6283c VY |
617 | if(length != RB_RW_SSL_NEED_WRITE) |
618 | rb_setselect(conn->mod_fd, RB_SELECT_READ, conn_mod_read_cb, conn); | |
619 | else | |
620 | { | |
621 | rb_setselect(conn->mod_fd, RB_SELECT_READ, NULL, NULL); | |
622 | rb_setselect(conn->mod_fd, RB_SELECT_WRITE, conn_mod_read_cb, conn); | |
623 | SetSSLRWantsW(conn); | |
624 | } | |
8d99443b VY |
625 | conn_plain_write_sendq(conn->plain_fd, conn); |
626 | return; | |
3202e249 | 627 | } |
8d99443b VY |
628 | conn->mod_in += length; |
629 | #ifdef HAVE_LIBZ | |
630 | if(IsZip(conn)) | |
631 | common_zlib_inflate(conn, inbuf, length); | |
632 | else | |
633 | #endif | |
634 | conn_plain_write(conn, inbuf, length); | |
635 | } | |
636 | } | |
637 | ||
638 | static void | |
3202e249 | 639 | conn_plain_write_sendq(rb_fde_t *fd, void *data) |
8d99443b VY |
640 | { |
641 | conn_t *conn = data; | |
642 | int retlen; | |
643 | ||
644 | if(IsDead(conn)) | |
645 | return; | |
646 | ||
3202e249 | 647 | while((retlen = rb_rawbuf_flush(conn->plainbuf_out, fd)) > 0) |
8d99443b VY |
648 | { |
649 | conn->plain_out += retlen; | |
650 | } | |
651 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
652 | { | |
653 | close_conn(data, NO_WAIT, NULL); | |
654 | return; | |
655 | } | |
3202e249 | 656 | |
8d99443b VY |
657 | |
658 | if(rb_rawbuf_length(conn->plainbuf_out) > 0) | |
659 | rb_setselect(conn->plain_fd, RB_SELECT_WRITE, conn_plain_write_sendq, conn); | |
660 | else | |
661 | rb_setselect(conn->plain_fd, RB_SELECT_WRITE, NULL, NULL); | |
662 | } | |
663 | ||
664 | static int | |
665 | maxconn(void) | |
666 | { | |
667 | #if defined(RLIMIT_NOFILE) && defined(HAVE_SYS_RESOURCE_H) | |
668 | struct rlimit limit; | |
669 | ||
670 | if(!getrlimit(RLIMIT_NOFILE, &limit)) | |
671 | { | |
672 | return limit.rlim_cur; | |
673 | } | |
674 | #endif /* RLIMIT_FD_MAX */ | |
675 | return MAXCONNECTIONS; | |
676 | } | |
677 | ||
678 | static void | |
3202e249 | 679 | ssl_process_accept_cb(rb_fde_t *F, int status, struct sockaddr *addr, rb_socklen_t len, void *data) |
8d99443b VY |
680 | { |
681 | conn_t *conn = data; | |
7247337a JT |
682 | char buf[5 + RB_SSL_CERTFP_LEN]; |
683 | ||
8d99443b VY |
684 | if(status == RB_OK) |
685 | { | |
7247337a JT |
686 | if(rb_get_ssl_certfp(F, &buf[5])) |
687 | { | |
688 | buf[0] = 'F'; | |
689 | int32_to_buf(&buf[1], conn->id); | |
690 | mod_cmd_write_queue(conn->ctl, buf, sizeof buf); | |
691 | } | |
8d99443b VY |
692 | conn_mod_read_cb(conn->mod_fd, conn); |
693 | conn_plain_read_cb(conn->plain_fd, conn); | |
694 | return; | |
695 | } | |
a444bb78 | 696 | /* ircd doesn't care about the reason for this */ |
8d99443b VY |
697 | close_conn(conn, NO_WAIT, 0); |
698 | return; | |
699 | } | |
700 | ||
701 | static void | |
3202e249 | 702 | ssl_process_connect_cb(rb_fde_t *F, int status, void *data) |
8d99443b VY |
703 | { |
704 | conn_t *conn = data; | |
a7675ed2 AC |
705 | char buf[5 + RB_SSL_CERTFP_LEN]; |
706 | ||
8d99443b VY |
707 | if(status == RB_OK) |
708 | { | |
a7675ed2 AC |
709 | if(rb_get_ssl_certfp(F, &buf[5])) |
710 | { | |
711 | buf[0] = 'F'; | |
712 | int32_to_buf(&buf[1], conn->id); | |
713 | mod_cmd_write_queue(conn->ctl, buf, sizeof buf); | |
714 | } | |
8d99443b VY |
715 | conn_mod_read_cb(conn->mod_fd, conn); |
716 | conn_plain_read_cb(conn->plain_fd, conn); | |
8d99443b | 717 | } |
a444bb78 JT |
718 | else if(status == RB_ERR_TIMEOUT) |
719 | close_conn(conn, WAIT_PLAIN, "SSL handshake timed out"); | |
720 | else if(status == RB_ERROR_SSL) | |
721 | close_conn(conn, WAIT_PLAIN, "%s", rb_get_ssl_strerror(conn->mod_fd)); | |
722 | else | |
723 | close_conn(conn, WAIT_PLAIN, "SSL handshake failed"); | |
8d99443b VY |
724 | } |
725 | ||
726 | ||
c03677e9 JT |
727 | static void |
728 | cleanup_bad_message(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
729 | { | |
730 | int i; | |
731 | ||
732 | /* XXX should log this somehow */ | |
733 | for (i = 0; i < ctlb->nfds; i++) | |
734 | rb_close(ctlb->F[i]); | |
735 | } | |
736 | ||
8d99443b VY |
737 | static void |
738 | ssl_process_accept(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
739 | { | |
740 | conn_t *conn; | |
7edb4f16 | 741 | int32_t id; |
8d99443b VY |
742 | |
743 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
744 | ||
745 | id = buf_to_int32(&ctlb->buf[1]); | |
746 | ||
747 | if(id >= 0) | |
748 | conn_add_id_hash(conn, id); | |
749 | SetSSL(conn); | |
750 | ||
751 | if(rb_get_type(conn->mod_fd) & RB_FD_UNKNOWN) | |
752 | { | |
3202e249 | 753 | |
8d99443b VY |
754 | rb_set_type(conn->mod_fd, RB_FD_SOCKET); |
755 | } | |
756 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
757 | rb_set_type(conn->plain_fd, RB_FD_SOCKET); | |
758 | ||
759 | rb_ssl_start_accepted(ctlb->F[0], ssl_process_accept_cb, conn, 10); | |
760 | } | |
761 | ||
762 | static void | |
763 | ssl_process_connect(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
764 | { | |
765 | conn_t *conn; | |
7edb4f16 | 766 | int32_t id; |
8d99443b VY |
767 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); |
768 | ||
769 | id = buf_to_int32(&ctlb->buf[1]); | |
770 | ||
771 | if(id >= 0) | |
772 | conn_add_id_hash(conn, id); | |
773 | SetSSL(conn); | |
774 | ||
775 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
776 | rb_set_type(conn->mod_fd, RB_FD_SOCKET); | |
777 | ||
778 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
779 | rb_set_type(conn->plain_fd, RB_FD_SOCKET); | |
780 | ||
781 | ||
782 | rb_ssl_start_connected(ctlb->F[0], ssl_process_connect_cb, conn, 10); | |
783 | } | |
784 | ||
785 | static void | |
786 | process_stats(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
787 | { | |
788 | char outstat[512]; | |
789 | conn_t *conn; | |
790 | const char *odata; | |
7edb4f16 | 791 | int32_t id; |
8d99443b VY |
792 | |
793 | id = buf_to_int32(&ctlb->buf[1]); | |
794 | ||
795 | if(id < 0) | |
796 | return; | |
3202e249 | 797 | |
8d99443b VY |
798 | odata = &ctlb->buf[5]; |
799 | conn = conn_find_by_id(id); | |
800 | ||
801 | if(conn == NULL) | |
802 | return; | |
803 | ||
804 | rb_snprintf(outstat, sizeof(outstat), "S %s %llu %llu %llu %llu", odata, | |
805 | conn->plain_out, conn->mod_in, conn->plain_in, conn->mod_out); | |
806 | conn->plain_out = 0; | |
807 | conn->plain_in = 0; | |
808 | conn->mod_in = 0; | |
809 | conn->mod_out = 0; | |
810 | mod_cmd_write_queue(ctl, outstat, strlen(outstat) + 1); /* +1 is so we send the \0 as well */ | |
811 | } | |
812 | ||
07c2bb75 JT |
813 | static void |
814 | change_connid(mod_ctl_t *ctl, mod_ctl_buf_t *ctlb) | |
815 | { | |
816 | int32_t id = buf_to_int32(&ctlb->buf[1]); | |
817 | int32_t newid = buf_to_int32(&ctlb->buf[5]); | |
818 | conn_t *conn = conn_find_by_id(id); | |
819 | if(conn->id >= 0) | |
820 | rb_dlinkDelete(&conn->node, connid_hash(conn->id)); | |
821 | SetZipSSL(conn); | |
822 | conn->id = newid; | |
823 | } | |
824 | ||
8d99443b | 825 | #ifdef HAVE_LIBZ |
8d99443b VY |
826 | static void |
827 | zlib_process(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) | |
828 | { | |
7edb4f16 | 829 | uint8_t level; |
8d99443b | 830 | size_t recvqlen; |
7edb4f16 | 831 | size_t hdr = (sizeof(uint8_t) * 2) + sizeof(int32_t); |
8d99443b VY |
832 | void *recvq_start; |
833 | z_stream *instream, *outstream; | |
834 | conn_t *conn; | |
7edb4f16 | 835 | int32_t id; |
8d99443b VY |
836 | |
837 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
838 | if(rb_get_type(conn->mod_fd) == RB_FD_UNKNOWN) | |
839 | rb_set_type(conn->mod_fd, RB_FD_SOCKET); | |
840 | ||
841 | if(rb_get_type(conn->plain_fd) == RB_FD_UNKNOWN) | |
842 | rb_set_type(conn->plain_fd, RB_FD_SOCKET); | |
843 | ||
844 | id = buf_to_int32(&ctlb->buf[1]); | |
845 | conn_add_id_hash(conn, id); | |
846 | ||
3202e249 | 847 | level = (uint8_t)ctlb->buf[5]; |
8d99443b VY |
848 | |
849 | recvqlen = ctlb->buflen - hdr; | |
850 | recvq_start = &ctlb->buf[6]; | |
851 | ||
852 | SetZip(conn); | |
853 | conn->stream = rb_malloc(sizeof(zlib_stream_t)); | |
3202e249 VY |
854 | instream = &((zlib_stream_t *) conn->stream)->instream; |
855 | outstream = &((zlib_stream_t *) conn->stream)->outstream; | |
856 | ||
8d99443b VY |
857 | instream->total_in = 0; |
858 | instream->total_out = 0; | |
859 | instream->zalloc = (alloc_func) ssld_alloc; | |
860 | instream->zfree = (free_func) ssld_free; | |
861 | instream->data_type = Z_ASCII; | |
3202e249 | 862 | inflateInit(&((zlib_stream_t *) conn->stream)->instream); |
8d99443b VY |
863 | |
864 | outstream->total_in = 0; | |
865 | outstream->total_out = 0; | |
866 | outstream->zalloc = (alloc_func) ssld_alloc; | |
867 | outstream->zfree = (free_func) ssld_free; | |
868 | outstream->data_type = Z_ASCII; | |
869 | ||
870 | if(level > 9) | |
871 | level = Z_DEFAULT_COMPRESSION; | |
872 | ||
3202e249 | 873 | deflateInit(&((zlib_stream_t *) conn->stream)->outstream, level); |
8d99443b VY |
874 | if(recvqlen > 0) |
875 | common_zlib_inflate(conn, recvq_start, recvqlen); | |
0bd120ed | 876 | |
8d99443b VY |
877 | conn_mod_read_cb(conn->mod_fd, conn); |
878 | conn_plain_read_cb(conn->plain_fd, conn); | |
879 | return; | |
880 | ||
881 | } | |
882 | #endif | |
883 | ||
884 | static void | |
885 | init_prng(mod_ctl_t * ctl, mod_ctl_buf_t * ctl_buf) | |
886 | { | |
887 | char *path; | |
888 | prng_seed_t seed_type; | |
3202e249 VY |
889 | |
890 | seed_type = (prng_seed_t) ctl_buf->buf[1]; | |
8d99443b VY |
891 | path = &ctl_buf->buf[2]; |
892 | rb_init_prng(path, seed_type); | |
893 | } | |
894 | ||
895 | ||
896 | static void | |
897 | ssl_new_keys(mod_ctl_t * ctl, mod_ctl_buf_t * ctl_buf) | |
898 | { | |
899 | char *buf; | |
900 | char *cert, *key, *dhparam; | |
901 | ||
902 | buf = &ctl_buf->buf[2]; | |
903 | cert = buf; | |
904 | buf += strlen(cert) + 1; | |
905 | key = buf; | |
906 | buf += strlen(key) + 1; | |
907 | dhparam = buf; | |
908 | if(strlen(dhparam) == 0) | |
909 | dhparam = NULL; | |
910 | ||
911 | if(!rb_setup_ssl_server(cert, key, dhparam)) | |
912 | { | |
913 | const char *invalid = "I"; | |
914 | mod_cmd_write_queue(ctl, invalid, strlen(invalid)); | |
915 | return; | |
3202e249 | 916 | } |
8d99443b VY |
917 | } |
918 | ||
919 | static void | |
3202e249 | 920 | send_nossl_support(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) |
8d99443b VY |
921 | { |
922 | static const char *nossl_cmd = "N"; | |
923 | conn_t *conn; | |
7edb4f16 | 924 | int32_t id; |
8d99443b VY |
925 | |
926 | if(ctlb != NULL) | |
3202e249 | 927 | { |
8d99443b VY |
928 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); |
929 | id = buf_to_int32(&ctlb->buf[1]); | |
930 | ||
931 | if(id >= 0) | |
932 | conn_add_id_hash(conn, id); | |
933 | close_conn(conn, WAIT_PLAIN, "libratbox reports no SSL/TLS support"); | |
3202e249 VY |
934 | } |
935 | mod_cmd_write_queue(ctl, nossl_cmd, strlen(nossl_cmd)); | |
8d99443b VY |
936 | } |
937 | ||
938 | static void | |
3202e249 | 939 | send_i_am_useless(mod_ctl_t * ctl) |
8d99443b VY |
940 | { |
941 | static const char *useless = "U"; | |
942 | mod_cmd_write_queue(ctl, useless, strlen(useless)); | |
943 | } | |
944 | ||
945 | static void | |
3202e249 | 946 | send_nozlib_support(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb) |
8d99443b VY |
947 | { |
948 | static const char *nozlib_cmd = "z"; | |
949 | conn_t *conn; | |
7edb4f16 | 950 | int32_t id; |
8d99443b VY |
951 | if(ctlb != NULL) |
952 | { | |
953 | conn = make_conn(ctl, ctlb->F[0], ctlb->F[1]); | |
954 | id = buf_to_int32(&ctlb->buf[1]); | |
955 | ||
956 | if(id >= 0) | |
957 | conn_add_id_hash(conn, id); | |
958 | close_conn(conn, WAIT_PLAIN, "libratbox reports no zlib support"); | |
3202e249 | 959 | } |
8d99443b VY |
960 | mod_cmd_write_queue(ctl, nozlib_cmd, strlen(nozlib_cmd)); |
961 | } | |
962 | ||
963 | static void | |
964 | mod_process_cmd_recv(mod_ctl_t * ctl) | |
965 | { | |
966 | rb_dlink_node *ptr, *next; | |
967 | mod_ctl_buf_t *ctl_buf; | |
968 | ||
969 | RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head) | |
970 | { | |
971 | ctl_buf = ptr->data; | |
972 | ||
973 | switch (*ctl_buf->buf) | |
974 | { | |
975 | case 'A': | |
976 | { | |
c03677e9 JT |
977 | if (ctl_buf->nfds != 2 || ctl_buf->buflen != 5) |
978 | { | |
979 | cleanup_bad_message(ctl, ctl_buf); | |
980 | break; | |
981 | } | |
982 | ||
8d99443b VY |
983 | if(!ssl_ok) |
984 | { | |
985 | send_nossl_support(ctl, ctl_buf); | |
986 | break; | |
987 | } | |
988 | ssl_process_accept(ctl, ctl_buf); | |
989 | break; | |
990 | } | |
991 | case 'C': | |
992 | { | |
c03677e9 JT |
993 | if (ctl_buf->nfds != 2 || ctl_buf->buflen != 5) |
994 | { | |
995 | cleanup_bad_message(ctl, ctl_buf); | |
996 | break; | |
997 | } | |
998 | ||
8d99443b VY |
999 | if(!ssl_ok) |
1000 | { | |
1001 | send_nossl_support(ctl, ctl_buf); | |
1002 | break; | |
1003 | } | |
1004 | ssl_process_connect(ctl, ctl_buf); | |
1005 | break; | |
1006 | } | |
1007 | ||
1008 | case 'K': | |
1009 | { | |
1010 | if(!ssl_ok) | |
1011 | { | |
1012 | send_nossl_support(ctl, ctl_buf); | |
1013 | break; | |
1014 | } | |
1015 | ssl_new_keys(ctl, ctl_buf); | |
1016 | break; | |
1017 | } | |
1018 | case 'I': | |
3202e249 VY |
1019 | init_prng(ctl, ctl_buf); |
1020 | break; | |
8d99443b VY |
1021 | case 'S': |
1022 | { | |
1023 | process_stats(ctl, ctl_buf); | |
1024 | break; | |
1025 | } | |
07c2bb75 JT |
1026 | case 'Y': |
1027 | { | |
1028 | change_connid(ctl, ctl_buf); | |
1029 | break; | |
1030 | } | |
1031 | ||
8d99443b VY |
1032 | #ifdef HAVE_LIBZ |
1033 | case 'Z': | |
1034 | { | |
c03677e9 JT |
1035 | if (ctl_buf->nfds != 2 || ctl_buf->buflen < 6) |
1036 | { | |
1037 | cleanup_bad_message(ctl, ctl_buf); | |
1038 | break; | |
1039 | } | |
1040 | ||
8d99443b VY |
1041 | /* just zlib only */ |
1042 | zlib_process(ctl, ctl_buf); | |
1043 | break; | |
1044 | } | |
1045 | #else | |
07c2bb75 | 1046 | |
8d99443b | 1047 | case 'Z': |
21192997 | 1048 | send_nozlib_support(ctl, ctl_buf); |
8d99443b | 1049 | break; |
3202e249 | 1050 | |
8d99443b VY |
1051 | #endif |
1052 | default: | |
1053 | break; | |
1054 | /* Log unknown commands */ | |
1055 | } | |
1056 | rb_dlinkDelete(ptr, &ctl->readq); | |
1057 | rb_free(ctl_buf->buf); | |
1058 | rb_free(ctl_buf); | |
1059 | } | |
1060 | ||
1061 | } | |
1062 | ||
1063 | ||
1064 | ||
1065 | static void | |
3202e249 | 1066 | mod_read_ctl(rb_fde_t *F, void *data) |
8d99443b VY |
1067 | { |
1068 | mod_ctl_buf_t *ctl_buf; | |
1069 | mod_ctl_t *ctl = data; | |
1070 | int retlen; | |
c03677e9 | 1071 | int i; |
8d99443b VY |
1072 | |
1073 | do | |
1074 | { | |
1075 | ctl_buf = rb_malloc(sizeof(mod_ctl_buf_t)); | |
1076 | ctl_buf->buf = rb_malloc(READBUF_SIZE); | |
1077 | ctl_buf->buflen = READBUF_SIZE; | |
1078 | retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, ctl_buf->buflen, ctl_buf->F, | |
1079 | MAXPASSFD); | |
1080 | if(retlen <= 0) | |
1081 | { | |
1082 | rb_free(ctl_buf->buf); | |
1083 | rb_free(ctl_buf); | |
1084 | } | |
1085 | else | |
1086 | { | |
1087 | ctl_buf->buflen = retlen; | |
1088 | rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq); | |
c03677e9 JT |
1089 | for (i = 0; i < MAXPASSFD && ctl_buf->F[i] != NULL; i++) |
1090 | ; | |
1091 | ctl_buf->nfds = i; | |
8d99443b VY |
1092 | } |
1093 | } | |
3202e249 | 1094 | while(retlen > 0); |
8d99443b VY |
1095 | |
1096 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
1097 | exit(0); | |
1098 | ||
1099 | mod_process_cmd_recv(ctl); | |
1100 | rb_setselect(ctl->F, RB_SELECT_READ, mod_read_ctl, ctl); | |
1101 | } | |
1102 | ||
1103 | static void | |
3202e249 | 1104 | mod_write_ctl(rb_fde_t *F, void *data) |
8d99443b VY |
1105 | { |
1106 | mod_ctl_t *ctl = data; | |
1107 | mod_ctl_buf_t *ctl_buf; | |
1108 | rb_dlink_node *ptr, *next; | |
1109 | int retlen, x; | |
1110 | ||
1111 | RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head) | |
1112 | { | |
1113 | ctl_buf = ptr->data; | |
1114 | retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, | |
3202e249 | 1115 | ctl_buf->buflen, ppid); |
8d99443b VY |
1116 | if(retlen > 0) |
1117 | { | |
1118 | rb_dlinkDelete(ptr, &ctl->writeq); | |
3202e249 | 1119 | for(x = 0; x < ctl_buf->nfds; x++) |
8d99443b VY |
1120 | rb_close(ctl_buf->F[x]); |
1121 | rb_free(ctl_buf->buf); | |
1122 | rb_free(ctl_buf); | |
1123 | ||
1124 | } | |
1125 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
3202e249 VY |
1126 | exit(0); |
1127 | ||
8d99443b | 1128 | } |
464b7606 JT |
1129 | if(rb_dlink_list_length(&ctl->writeq) > 0) |
1130 | rb_setselect(ctl->F, RB_SELECT_WRITE, mod_write_ctl, ctl); | |
8d99443b VY |
1131 | } |
1132 | ||
1133 | ||
1134 | static void | |
3202e249 | 1135 | read_pipe_ctl(rb_fde_t *F, void *data) |
8d99443b VY |
1136 | { |
1137 | int retlen; | |
3202e249 | 1138 | while((retlen = rb_read(F, inbuf, sizeof(inbuf))) > 0) |
8d99443b VY |
1139 | { |
1140 | ;; /* we don't do anything with the pipe really, just care if the other process dies.. */ | |
1141 | } | |
1142 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
1143 | exit(0); | |
1144 | rb_setselect(F, RB_SELECT_READ, read_pipe_ctl, NULL); | |
1145 | ||
1146 | } | |
1147 | ||
1148 | int | |
1149 | main(int argc, char **argv) | |
1150 | { | |
3202e249 | 1151 | const char *s_ctlfd, *s_pipe, *s_pid; |
8d99443b VY |
1152 | int ctlfd, pipefd, x, maxfd; |
1153 | maxfd = maxconn(); | |
3202e249 | 1154 | |
8d99443b VY |
1155 | s_ctlfd = getenv("CTL_FD"); |
1156 | s_pipe = getenv("CTL_PIPE"); | |
3202e249 | 1157 | s_pid = getenv("CTL_PPID"); |
8d99443b | 1158 | |
3202e249 | 1159 | if(s_ctlfd == NULL || s_pipe == NULL || s_pid == NULL) |
8d99443b | 1160 | { |
3202e249 VY |
1161 | fprintf(stderr, |
1162 | "This is ircd-ratbox ssld. You know you aren't supposed to run me directly?\n"); | |
1163 | fprintf(stderr, | |
1164 | "You get an Id tag for this: $Id$\n"); | |
8d99443b VY |
1165 | fprintf(stderr, "Have a nice life\n"); |
1166 | exit(1); | |
1167 | } | |
1168 | ||
1169 | ctlfd = atoi(s_ctlfd); | |
1170 | pipefd = atoi(s_pipe); | |
3202e249 VY |
1171 | ppid = atoi(s_pid); |
1172 | x = 0; | |
1173 | #ifndef _WIN32 | |
1174 | for(x = 0; x < maxfd; x++) | |
8d99443b VY |
1175 | { |
1176 | if(x != ctlfd && x != pipefd && x > 2) | |
1177 | close(x); | |
1178 | } | |
8d99443b | 1179 | x = open("/dev/null", O_RDWR); |
464b7606 | 1180 | |
8d99443b VY |
1181 | if(x >= 0) |
1182 | { | |
1183 | if(ctlfd != 0 && pipefd != 0) | |
1184 | dup2(x, 0); | |
1185 | if(ctlfd != 1 && pipefd != 1) | |
1186 | dup2(x, 1); | |
1187 | if(ctlfd != 2 && pipefd != 2) | |
1188 | dup2(x, 2); | |
1189 | if(x > 2) | |
1190 | close(x); | |
1191 | } | |
3202e249 | 1192 | #endif |
8d99443b VY |
1193 | setup_signals(); |
1194 | rb_lib_init(NULL, NULL, NULL, 0, maxfd, 1024, 4096); | |
1195 | rb_init_rawbuffers(1024); | |
3202e249 | 1196 | ssl_ok = rb_supports_ssl(); |
8d99443b VY |
1197 | mod_ctl = rb_malloc(sizeof(mod_ctl_t)); |
1198 | mod_ctl->F = rb_open(ctlfd, RB_FD_SOCKET, "ircd control socket"); | |
1199 | mod_ctl->F_pipe = rb_open(pipefd, RB_FD_PIPE, "ircd pipe"); | |
1200 | rb_set_nb(mod_ctl->F); | |
1201 | rb_set_nb(mod_ctl->F_pipe); | |
1202 | rb_event_addish("clean_dead_conns", clean_dead_conns, NULL, 10); | |
4b6a4d47 | 1203 | rb_event_add("check_handshake_flood", check_handshake_flood, NULL, 10); |
8d99443b VY |
1204 | read_pipe_ctl(mod_ctl->F_pipe, NULL); |
1205 | mod_read_ctl(mod_ctl->F, mod_ctl); | |
1206 | if(!zlib_ok && !ssl_ok) | |
1207 | { | |
1208 | /* this is really useless... */ | |
1209 | send_i_am_useless(mod_ctl); | |
1210 | /* sleep until the ircd kills us */ | |
3202e249 | 1211 | rb_sleep(2 << 30, 0); |
8d99443b VY |
1212 | exit(1); |
1213 | } | |
1214 | ||
1215 | if(!zlib_ok) | |
1216 | send_nozlib_support(mod_ctl, NULL); | |
1217 | if(!ssl_ok) | |
1218 | send_nossl_support(mod_ctl, NULL); | |
1219 | rb_lib_loop(0); | |
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | ||
3202e249 | 1224 | #ifndef _WIN32 |
8d99443b VY |
1225 | static void |
1226 | dummy_handler(int sig) | |
1227 | { | |
1228 | return; | |
1229 | } | |
3202e249 | 1230 | #endif |
8d99443b VY |
1231 | |
1232 | static void | |
1233 | setup_signals() | |
1234 | { | |
3202e249 | 1235 | #ifndef _WIN32 |
8d99443b VY |
1236 | struct sigaction act; |
1237 | ||
1238 | act.sa_flags = 0; | |
1239 | act.sa_handler = SIG_IGN; | |
1240 | sigemptyset(&act.sa_mask); | |
1241 | sigaddset(&act.sa_mask, SIGPIPE); | |
1242 | sigaddset(&act.sa_mask, SIGALRM); | |
1243 | #ifdef SIGTRAP | |
1244 | sigaddset(&act.sa_mask, SIGTRAP); | |
1245 | #endif | |
1246 | ||
1247 | #ifdef SIGWINCH | |
1248 | sigaddset(&act.sa_mask, SIGWINCH); | |
1249 | sigaction(SIGWINCH, &act, 0); | |
1250 | #endif | |
1251 | sigaction(SIGPIPE, &act, 0); | |
1252 | #ifdef SIGTRAP | |
1253 | sigaction(SIGTRAP, &act, 0); | |
1254 | #endif | |
1255 | ||
1256 | act.sa_handler = dummy_handler; | |
1257 | sigaction(SIGALRM, &act, 0); | |
3202e249 | 1258 | #endif |
8d99443b | 1259 | } |