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1 | /* | |
2 | * sslproc.c: An interface to ssld | |
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 | ||
22 | #include <rb_lib.h> | |
23 | #include "stdinc.h" | |
24 | ||
25 | ||
26 | #include "s_conf.h" | |
27 | #include "logger.h" | |
28 | #include "listener.h" | |
29 | #include "sslproc.h" | |
30 | #include "s_serv.h" | |
31 | #include "ircd.h" | |
32 | #include "hash.h" | |
33 | #include "client.h" | |
34 | #include "send.h" | |
35 | #include "packet.h" | |
36 | #include "certfp.h" | |
37 | ||
38 | #define ZIPSTATS_TIME 60 | |
39 | ||
40 | static void collect_zipstats(void *unused); | |
41 | static void ssl_read_ctl(rb_fde_t * F, void *data); | |
42 | static int ssld_count; | |
43 | ||
44 | static char tmpbuf[READBUF_SIZE]; | |
45 | static char nul = '\0'; | |
46 | ||
47 | #define MAXPASSFD 4 | |
48 | #define READSIZE 1024 | |
49 | typedef struct _ssl_ctl_buf | |
50 | { | |
51 | rb_dlink_node node; | |
52 | char *buf; | |
53 | size_t buflen; | |
54 | rb_fde_t *F[MAXPASSFD]; | |
55 | int nfds; | |
56 | } ssl_ctl_buf_t; | |
57 | ||
58 | ||
59 | struct _ssl_ctl | |
60 | { | |
61 | rb_dlink_node node; | |
62 | int cli_count; | |
63 | rb_fde_t *F; | |
64 | rb_fde_t *P; | |
65 | pid_t pid; | |
66 | rb_dlink_list readq; | |
67 | rb_dlink_list writeq; | |
68 | uint8_t shutdown; | |
69 | uint8_t dead; | |
70 | char version[256]; | |
71 | }; | |
72 | ||
73 | static void ssld_update_config_one(ssl_ctl_t *ctl); | |
74 | static void send_new_ssl_certs_one(ssl_ctl_t * ctl); | |
75 | static void send_certfp_method(ssl_ctl_t *ctl); | |
76 | ||
77 | ||
78 | static rb_dlink_list ssl_daemons; | |
79 | ||
80 | static inline uint32_t | |
81 | buf_to_uint32(char *buf) | |
82 | { | |
83 | uint32_t x; | |
84 | memcpy(&x, buf, sizeof(x)); | |
85 | return x; | |
86 | } | |
87 | ||
88 | static inline void | |
89 | uint32_to_buf(char *buf, uint32_t x) | |
90 | { | |
91 | memcpy(buf, &x, sizeof(x)); | |
92 | return; | |
93 | } | |
94 | ||
95 | static ssl_ctl_t * | |
96 | allocate_ssl_daemon(rb_fde_t * F, rb_fde_t * P, int pid) | |
97 | { | |
98 | ssl_ctl_t *ctl; | |
99 | ||
100 | if(F == NULL || pid < 0) | |
101 | return NULL; | |
102 | ctl = rb_malloc(sizeof(ssl_ctl_t)); | |
103 | ctl->F = F; | |
104 | ctl->P = P; | |
105 | ctl->pid = pid; | |
106 | ssld_count++; | |
107 | rb_dlinkAdd(ctl, &ctl->node, &ssl_daemons); | |
108 | return ctl; | |
109 | } | |
110 | ||
111 | static void | |
112 | free_ssl_daemon(ssl_ctl_t * ctl) | |
113 | { | |
114 | rb_dlink_node *ptr; | |
115 | ssl_ctl_buf_t *ctl_buf; | |
116 | int x; | |
117 | if(ctl->cli_count) | |
118 | return; | |
119 | ||
120 | RB_DLINK_FOREACH(ptr, ctl->readq.head) | |
121 | { | |
122 | ctl_buf = ptr->data; | |
123 | for(x = 0; x < ctl_buf->nfds; x++) | |
124 | rb_close(ctl_buf->F[x]); | |
125 | ||
126 | rb_free(ctl_buf->buf); | |
127 | rb_free(ctl_buf); | |
128 | } | |
129 | ||
130 | RB_DLINK_FOREACH(ptr, ctl->writeq.head) | |
131 | { | |
132 | ctl_buf = ptr->data; | |
133 | for(x = 0; x < ctl_buf->nfds; x++) | |
134 | rb_close(ctl_buf->F[x]); | |
135 | ||
136 | rb_free(ctl_buf->buf); | |
137 | rb_free(ctl_buf); | |
138 | } | |
139 | rb_close(ctl->F); | |
140 | rb_close(ctl->P); | |
141 | rb_dlinkDelete(&ctl->node, &ssl_daemons); | |
142 | rb_free(ctl); | |
143 | } | |
144 | ||
145 | static char *ssld_path; | |
146 | ||
147 | static int ssld_spin_count = 0; | |
148 | static time_t last_spin; | |
149 | static int ssld_wait = 0; | |
150 | ||
151 | ||
152 | void | |
153 | restart_ssld(void) | |
154 | { | |
155 | rb_dlink_node *ptr, *next; | |
156 | ssl_ctl_t *ctl; | |
157 | ||
158 | RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head) | |
159 | { | |
160 | ctl = ptr->data; | |
161 | if(ctl->dead) | |
162 | continue; | |
163 | if(ctl->shutdown) | |
164 | continue; | |
165 | ctl->shutdown = 1; | |
166 | ssld_count--; | |
167 | if(!ctl->cli_count) | |
168 | { | |
169 | rb_kill(ctl->pid, SIGKILL); | |
170 | free_ssl_daemon(ctl); | |
171 | } | |
172 | } | |
173 | ||
174 | ssld_spin_count = 0; | |
175 | last_spin = 0; | |
176 | ssld_wait = 0; | |
177 | start_ssldaemon(ServerInfo.ssld_count); | |
178 | } | |
179 | ||
180 | static void | |
181 | ssl_killall(void) | |
182 | { | |
183 | rb_dlink_node *ptr, *next; | |
184 | ssl_ctl_t *ctl; | |
185 | RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head) | |
186 | { | |
187 | ctl = ptr->data; | |
188 | if(ctl->dead) | |
189 | continue; | |
190 | ctl->dead = 1; | |
191 | if(!ctl->shutdown) | |
192 | ssld_count--; | |
193 | rb_kill(ctl->pid, SIGKILL); | |
194 | if(!ctl->cli_count) | |
195 | free_ssl_daemon(ctl); | |
196 | } | |
197 | } | |
198 | ||
199 | static void | |
200 | ssl_dead(ssl_ctl_t * ctl) | |
201 | { | |
202 | if(ctl->dead) | |
203 | return; | |
204 | ||
205 | ctl->dead = 1; | |
206 | rb_kill(ctl->pid, SIGKILL); /* make sure the process is really gone */ | |
207 | ||
208 | if(!ctl->shutdown) | |
209 | { | |
210 | ssld_count--; | |
211 | ilog(L_MAIN, "ssld helper died - attempting to restart"); | |
212 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "ssld helper died - attempting to restart"); | |
213 | start_ssldaemon(1); | |
214 | } | |
215 | } | |
216 | ||
217 | static void | |
218 | ssl_do_pipe(rb_fde_t * F, void *data) | |
219 | { | |
220 | int retlen; | |
221 | ssl_ctl_t *ctl = data; | |
222 | retlen = rb_write(F, "0", 1); | |
223 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
224 | { | |
225 | ssl_dead(ctl); | |
226 | return; | |
227 | } | |
228 | rb_setselect(F, RB_SELECT_READ, ssl_do_pipe, data); | |
229 | } | |
230 | ||
231 | static void | |
232 | restart_ssld_event(void *unused) | |
233 | { | |
234 | ssld_spin_count = 0; | |
235 | last_spin = 0; | |
236 | ssld_wait = 0; | |
237 | if(ServerInfo.ssld_count > get_ssld_count()) | |
238 | { | |
239 | int start = ServerInfo.ssld_count - get_ssld_count(); | |
240 | ilog(L_MAIN, "Attempting to restart ssld processes"); | |
241 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Attempt to restart ssld processes"); | |
242 | start_ssldaemon(start); | |
243 | } | |
244 | } | |
245 | ||
246 | int | |
247 | start_ssldaemon(int count) | |
248 | { | |
249 | rb_fde_t *F1, *F2; | |
250 | rb_fde_t *P1, *P2; | |
251 | #ifdef _WIN32 | |
252 | const char *suffix = ".exe"; | |
253 | #else | |
254 | const char *suffix = ""; | |
255 | #endif | |
256 | ||
257 | char fullpath[PATH_MAX + 1]; | |
258 | char fdarg[6]; | |
259 | const char *parv[2]; | |
260 | char buf[128]; | |
261 | char s_pid[10]; | |
262 | pid_t pid; | |
263 | int started = 0, i; | |
264 | ||
265 | if(ssld_wait) | |
266 | return 0; | |
267 | ||
268 | if(ssld_spin_count > 20 && (rb_current_time() - last_spin < 5)) | |
269 | { | |
270 | ilog(L_MAIN, "ssld helper is spinning - will attempt to restart in 1 minute"); | |
271 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, | |
272 | "ssld helper is spinning - will attempt to restart in 1 minute"); | |
273 | rb_event_add("restart_ssld_event", restart_ssld_event, NULL, 60); | |
274 | ssld_wait = 1; | |
275 | return 0; | |
276 | } | |
277 | ||
278 | ssld_spin_count++; | |
279 | last_spin = rb_current_time(); | |
280 | ||
281 | if(ssld_path == NULL) | |
282 | { | |
283 | snprintf(fullpath, sizeof(fullpath), "%s%cssld%s", ircd_paths[IRCD_PATH_LIBEXEC], RB_PATH_SEPARATOR, suffix); | |
284 | ||
285 | if(access(fullpath, X_OK) == -1) | |
286 | { | |
287 | snprintf(fullpath, sizeof(fullpath), "%s%cbin%cssld%s", | |
288 | ConfigFileEntry.dpath, RB_PATH_SEPARATOR, RB_PATH_SEPARATOR, suffix); | |
289 | if(access(fullpath, X_OK) == -1) | |
290 | { | |
291 | ilog(L_MAIN, | |
292 | "Unable to execute ssld%s in %s or %s/bin", | |
293 | suffix, ircd_paths[IRCD_PATH_LIBEXEC], ConfigFileEntry.dpath); | |
294 | return 0; | |
295 | } | |
296 | } | |
297 | ssld_path = rb_strdup(fullpath); | |
298 | } | |
299 | rb_strlcpy(buf, "-ircd ssld daemon", sizeof(buf)); | |
300 | parv[0] = buf; | |
301 | parv[1] = NULL; | |
302 | ||
303 | for(i = 0; i < count; i++) | |
304 | { | |
305 | ssl_ctl_t *ctl; | |
306 | if(rb_socketpair(AF_UNIX, SOCK_DGRAM, 0, &F1, &F2, "SSL/TLS handle passing socket") == -1) | |
307 | { | |
308 | ilog(L_MAIN, "Unable to create ssld - rb_socketpair failed: %s", strerror(errno)); | |
309 | return started; | |
310 | } | |
311 | ||
312 | rb_set_buffers(F1, READBUF_SIZE); | |
313 | rb_set_buffers(F2, READBUF_SIZE); | |
314 | snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(F2)); | |
315 | rb_setenv("CTL_FD", fdarg, 1); | |
316 | if(rb_pipe(&P1, &P2, "SSL/TLS pipe") == -1) | |
317 | { | |
318 | ilog(L_MAIN, "Unable to create ssld - rb_pipe failed: %s", strerror(errno)); | |
319 | return started; | |
320 | } | |
321 | snprintf(fdarg, sizeof(fdarg), "%d", rb_get_fd(P1)); | |
322 | rb_setenv("CTL_PIPE", fdarg, 1); | |
323 | snprintf(s_pid, sizeof(s_pid), "%d", (int)getpid()); | |
324 | rb_setenv("CTL_PPID", s_pid, 1); | |
325 | #ifdef _WIN32 | |
326 | SetHandleInformation((HANDLE) rb_get_fd(F2), HANDLE_FLAG_INHERIT, 1); | |
327 | SetHandleInformation((HANDLE) rb_get_fd(P1), HANDLE_FLAG_INHERIT, 1); | |
328 | #endif | |
329 | ||
330 | pid = rb_spawn_process(ssld_path, (const char **) parv); | |
331 | if(pid == -1) | |
332 | { | |
333 | ilog(L_MAIN, "Unable to create ssld: %s\n", strerror(errno)); | |
334 | rb_close(F1); | |
335 | rb_close(F2); | |
336 | rb_close(P1); | |
337 | rb_close(P2); | |
338 | return started; | |
339 | } | |
340 | started++; | |
341 | rb_close(F2); | |
342 | rb_close(P1); | |
343 | ctl = allocate_ssl_daemon(F1, P2, pid); | |
344 | if(ircd_ssl_ok) | |
345 | ssld_update_config_one(ctl); | |
346 | ssl_read_ctl(ctl->F, ctl); | |
347 | ssl_do_pipe(P2, ctl); | |
348 | ||
349 | } | |
350 | return started; | |
351 | } | |
352 | ||
353 | static void | |
354 | ssl_process_zipstats(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf) | |
355 | { | |
356 | struct Client *server; | |
357 | struct ZipStats *zips; | |
358 | char *parv[6]; | |
359 | int parc = rb_string_to_array(ctl_buf->buf, parv, sizeof(parv)); | |
360 | ||
361 | if (parc < sizeof(parv)) | |
362 | return; | |
363 | ||
364 | server = find_server(NULL, parv[1]); | |
365 | if(server == NULL || server->localClient == NULL || !IsCapable(server, CAP_ZIP)) | |
366 | return; | |
367 | if(server->localClient->zipstats == NULL) | |
368 | server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats)); | |
369 | ||
370 | zips = server->localClient->zipstats; | |
371 | ||
372 | zips->in += strtoull(parv[2], NULL, 10); | |
373 | zips->in_wire += strtoull(parv[3], NULL, 10); | |
374 | zips->out += strtoull(parv[4], NULL, 10); | |
375 | zips->out_wire += strtoull(parv[5], NULL, 10); | |
376 | ||
377 | if(zips->in > 0) | |
378 | zips->in_ratio = ((double) (zips->in - zips->in_wire) / (double) zips->in) * 100.00; | |
379 | else | |
380 | zips->in_ratio = 0; | |
381 | ||
382 | if(zips->out > 0) | |
383 | zips->out_ratio = ((double) (zips->out - zips->out_wire) / (double) zips->out) * 100.00; | |
384 | else | |
385 | zips->out_ratio = 0; | |
386 | } | |
387 | ||
388 | static void | |
389 | ssl_process_open_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf) | |
390 | { | |
391 | struct Client *client_p; | |
392 | uint32_t fd; | |
393 | ||
394 | if(ctl_buf->buflen < 5) | |
395 | return; /* bogus message..drop it.. XXX should warn here */ | |
396 | ||
397 | fd = buf_to_uint32(&ctl_buf->buf[1]); | |
398 | client_p = find_cli_connid_hash(fd); | |
399 | if(client_p == NULL || client_p->localClient == NULL) | |
400 | return; | |
401 | ||
402 | if(client_p->localClient->ssl_callback) | |
403 | { | |
404 | SSL_OPEN_CB *hdl = client_p->localClient->ssl_callback; | |
405 | ||
406 | client_p->localClient->ssl_callback = NULL; | |
407 | ||
408 | hdl(client_p, RB_OK); | |
409 | } | |
410 | } | |
411 | ||
412 | static void | |
413 | ssl_process_dead_fd(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf) | |
414 | { | |
415 | struct Client *client_p; | |
416 | char reason[256]; | |
417 | uint32_t fd; | |
418 | ||
419 | if(ctl_buf->buflen < 6) | |
420 | return; /* bogus message..drop it.. XXX should warn here */ | |
421 | ||
422 | fd = buf_to_uint32(&ctl_buf->buf[1]); | |
423 | rb_strlcpy(reason, &ctl_buf->buf[5], sizeof(reason)); | |
424 | client_p = find_cli_connid_hash(fd); | |
425 | if(client_p == NULL || client_p->localClient == NULL) | |
426 | return; | |
427 | ||
428 | if(IsAnyServer(client_p)) | |
429 | { | |
430 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "ssld error for %s: %s", client_p->name, reason); | |
431 | ilog(L_SERVER, "ssld error for %s: %s", log_client_name(client_p, SHOW_IP), reason); | |
432 | } | |
433 | ||
434 | /* if there is still a pending callback, call it now */ | |
435 | if(client_p->localClient->ssl_callback) | |
436 | { | |
437 | SSL_OPEN_CB *hdl = client_p->localClient->ssl_callback; | |
438 | ||
439 | client_p->localClient->ssl_callback = NULL; | |
440 | ||
441 | if (hdl(client_p, RB_ERROR_SSL)) | |
442 | { | |
443 | /* the callback has exited the client */ | |
444 | return; | |
445 | } | |
446 | } | |
447 | ||
448 | if(IsAnyServer(client_p) || IsRegistered(client_p)) | |
449 | { | |
450 | /* read any last moment ERROR, QUIT or the like -- jilles */ | |
451 | if (!strcmp(reason, "Remote host closed the connection")) | |
452 | read_packet(client_p->localClient->F, client_p); | |
453 | if (IsAnyDead(client_p)) | |
454 | return; | |
455 | } | |
456 | exit_client(client_p, client_p, &me, reason); | |
457 | } | |
458 | ||
459 | ||
460 | static void | |
461 | ssl_process_cipher_string(ssl_ctl_t *ctl, ssl_ctl_buf_t *ctl_buf) | |
462 | { | |
463 | struct Client *client_p; | |
464 | const char *cstring; | |
465 | uint32_t fd; | |
466 | ||
467 | if(ctl_buf->buflen < 6) | |
468 | return; /* bogus message..drop it.. XXX should warn here */ | |
469 | ||
470 | fd = buf_to_uint32(&ctl_buf->buf[1]); | |
471 | cstring = (const char *)&ctl_buf->buf[5]; | |
472 | ||
473 | if(EmptyString(cstring)) | |
474 | return; | |
475 | ||
476 | client_p = find_cli_connid_hash(fd); | |
477 | if(client_p != NULL && client_p->localClient != NULL) | |
478 | { | |
479 | rb_free(client_p->localClient->cipher_string); | |
480 | client_p->localClient->cipher_string = rb_strdup(cstring); | |
481 | } | |
482 | } | |
483 | ||
484 | ||
485 | static void | |
486 | ssl_process_certfp(ssl_ctl_t * ctl, ssl_ctl_buf_t * ctl_buf) | |
487 | { | |
488 | struct Client *client_p; | |
489 | uint32_t fd; | |
490 | uint32_t certfp_method; | |
491 | uint32_t len; | |
492 | uint8_t *certfp; | |
493 | char *certfp_string; | |
494 | const char *method_string; | |
495 | int method_len; | |
496 | ||
497 | if(ctl_buf->buflen > 13 + RB_SSL_CERTFP_LEN) | |
498 | return; /* bogus message..drop it.. XXX should warn here */ | |
499 | ||
500 | fd = buf_to_uint32(&ctl_buf->buf[1]); | |
501 | certfp_method = buf_to_uint32(&ctl_buf->buf[5]); | |
502 | len = buf_to_uint32(&ctl_buf->buf[9]); | |
503 | certfp = (uint8_t *)&ctl_buf->buf[13]; | |
504 | client_p = find_cli_connid_hash(fd); | |
505 | if(client_p == NULL) | |
506 | return; | |
507 | ||
508 | switch (certfp_method) { | |
509 | case RB_SSL_CERTFP_METH_CERT_SHA1: | |
510 | method_string = CERTFP_PREFIX_CERT_SHA1; | |
511 | break; | |
512 | case RB_SSL_CERTFP_METH_CERT_SHA256: | |
513 | method_string = CERTFP_PREFIX_CERT_SHA256; | |
514 | break; | |
515 | case RB_SSL_CERTFP_METH_CERT_SHA512: | |
516 | method_string = CERTFP_PREFIX_CERT_SHA512; | |
517 | break; | |
518 | case RB_SSL_CERTFP_METH_SPKI_SHA256: | |
519 | method_string = CERTFP_PREFIX_SPKI_SHA256; | |
520 | break; | |
521 | case RB_SSL_CERTFP_METH_SPKI_SHA512: | |
522 | method_string = CERTFP_PREFIX_SPKI_SHA512; | |
523 | break; | |
524 | default: | |
525 | return; | |
526 | } | |
527 | method_len = strlen(method_string); | |
528 | ||
529 | rb_free(client_p->certfp); | |
530 | certfp_string = rb_malloc(method_len + len * 2 + 1); | |
531 | rb_strlcpy(certfp_string, method_string, method_len + len * 2 + 1); | |
532 | for(uint32_t i = 0; i < len; i++) | |
533 | snprintf(certfp_string + method_len + 2 * i, 3, "%02x", | |
534 | certfp[i]); | |
535 | client_p->certfp = certfp_string; | |
536 | } | |
537 | ||
538 | static void | |
539 | ssl_process_cmd_recv(ssl_ctl_t * ctl) | |
540 | { | |
541 | static const char *cannot_setup_ssl = "ssld cannot setup ssl, check your certificates and private key"; | |
542 | static const char *no_ssl_or_zlib = "ssld has neither SSL/TLS or zlib support killing all sslds"; | |
543 | rb_dlink_node *ptr, *next; | |
544 | ssl_ctl_buf_t *ctl_buf; | |
545 | unsigned long len; | |
546 | ||
547 | if(ctl->dead) | |
548 | return; | |
549 | ||
550 | RB_DLINK_FOREACH_SAFE(ptr, next, ctl->readq.head) | |
551 | { | |
552 | ctl_buf = ptr->data; | |
553 | switch (*ctl_buf->buf) | |
554 | { | |
555 | case 'N': | |
556 | ircd_ssl_ok = false; /* ssld says it can't do ssl/tls */ | |
557 | break; | |
558 | case 'O': | |
559 | ssl_process_open_fd(ctl, ctl_buf); | |
560 | break; | |
561 | case 'D': | |
562 | ssl_process_dead_fd(ctl, ctl_buf); | |
563 | break; | |
564 | case 'C': | |
565 | ssl_process_cipher_string(ctl, ctl_buf); | |
566 | break; | |
567 | case 'F': | |
568 | ssl_process_certfp(ctl, ctl_buf); | |
569 | break; | |
570 | case 'S': | |
571 | ssl_process_zipstats(ctl, ctl_buf); | |
572 | break; | |
573 | case 'I': | |
574 | ircd_ssl_ok = false; | |
575 | ilog(L_MAIN, "%s", cannot_setup_ssl); | |
576 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "%s", cannot_setup_ssl); | |
577 | break; | |
578 | case 'U': | |
579 | ircd_zlib_ok = 0; | |
580 | ircd_ssl_ok = false; | |
581 | ilog(L_MAIN, "%s", no_ssl_or_zlib); | |
582 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "%s", no_ssl_or_zlib); | |
583 | ssl_killall(); | |
584 | return; | |
585 | case 'V': | |
586 | len = ctl_buf->buflen - 1; | |
587 | if (len > sizeof(ctl->version) - 1) | |
588 | len = sizeof(ctl->version) - 1; | |
589 | strncpy(ctl->version, &ctl_buf->buf[1], len); | |
590 | case 'z': | |
591 | ircd_zlib_ok = 0; | |
592 | break; | |
593 | default: | |
594 | ilog(L_MAIN, "Received invalid command from ssld: %s", ctl_buf->buf); | |
595 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Received invalid command from ssld"); | |
596 | break; | |
597 | } | |
598 | rb_dlinkDelete(ptr, &ctl->readq); | |
599 | rb_free(ctl_buf->buf); | |
600 | rb_free(ctl_buf); | |
601 | } | |
602 | ||
603 | } | |
604 | ||
605 | ||
606 | static void | |
607 | ssl_read_ctl(rb_fde_t * F, void *data) | |
608 | { | |
609 | ssl_ctl_buf_t *ctl_buf; | |
610 | ssl_ctl_t *ctl = data; | |
611 | int retlen; | |
612 | ||
613 | if(ctl->dead) | |
614 | return; | |
615 | do | |
616 | { | |
617 | ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t)); | |
618 | ctl_buf->buf = rb_malloc(READSIZE); | |
619 | retlen = rb_recv_fd_buf(ctl->F, ctl_buf->buf, READSIZE, ctl_buf->F, 4); | |
620 | ctl_buf->buflen = retlen; | |
621 | if(retlen <= 0) | |
622 | { | |
623 | rb_free(ctl_buf->buf); | |
624 | rb_free(ctl_buf); | |
625 | } | |
626 | else | |
627 | rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->readq); | |
628 | } | |
629 | while(retlen > 0); | |
630 | ||
631 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
632 | { | |
633 | ssl_dead(ctl); | |
634 | return; | |
635 | } | |
636 | ssl_process_cmd_recv(ctl); | |
637 | rb_setselect(ctl->F, RB_SELECT_READ, ssl_read_ctl, ctl); | |
638 | } | |
639 | ||
640 | static ssl_ctl_t * | |
641 | which_ssld(void) | |
642 | { | |
643 | ssl_ctl_t *ctl, *lowest = NULL; | |
644 | rb_dlink_node *ptr; | |
645 | ||
646 | RB_DLINK_FOREACH(ptr, ssl_daemons.head) | |
647 | { | |
648 | ctl = ptr->data; | |
649 | if(ctl->dead) | |
650 | continue; | |
651 | if(ctl->shutdown) | |
652 | continue; | |
653 | if(lowest == NULL) | |
654 | { | |
655 | lowest = ctl; | |
656 | continue; | |
657 | } | |
658 | if(ctl->cli_count < lowest->cli_count) | |
659 | lowest = ctl; | |
660 | } | |
661 | return (lowest); | |
662 | } | |
663 | ||
664 | static void | |
665 | ssl_write_ctl(rb_fde_t * F, void *data) | |
666 | { | |
667 | ssl_ctl_t *ctl = data; | |
668 | ssl_ctl_buf_t *ctl_buf; | |
669 | rb_dlink_node *ptr, *next; | |
670 | int retlen, x; | |
671 | ||
672 | if(ctl->dead) | |
673 | return; | |
674 | ||
675 | RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head) | |
676 | { | |
677 | ctl_buf = ptr->data; | |
678 | /* in theory unix sock_dgram shouldn't ever short write this.. */ | |
679 | retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf, ctl_buf->buflen, ctl->pid); | |
680 | if(retlen > 0) | |
681 | { | |
682 | rb_dlinkDelete(ptr, &ctl->writeq); | |
683 | for(x = 0; x < ctl_buf->nfds; x++) | |
684 | rb_close(ctl_buf->F[x]); | |
685 | rb_free(ctl_buf->buf); | |
686 | rb_free(ctl_buf); | |
687 | ||
688 | } | |
689 | if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno))) | |
690 | { | |
691 | ssl_dead(ctl); | |
692 | return; | |
693 | } | |
694 | else | |
695 | { | |
696 | rb_setselect(ctl->F, RB_SELECT_WRITE, ssl_write_ctl, ctl); | |
697 | } | |
698 | } | |
699 | } | |
700 | ||
701 | static void | |
702 | ssl_cmd_write_queue(ssl_ctl_t * ctl, rb_fde_t ** F, int count, const void *buf, size_t buflen) | |
703 | { | |
704 | ssl_ctl_buf_t *ctl_buf; | |
705 | int x; | |
706 | ||
707 | /* don't bother */ | |
708 | if(ctl->dead) | |
709 | return; | |
710 | ||
711 | ctl_buf = rb_malloc(sizeof(ssl_ctl_buf_t)); | |
712 | ctl_buf->buf = rb_malloc(buflen); | |
713 | memcpy(ctl_buf->buf, buf, buflen); | |
714 | ctl_buf->buflen = buflen; | |
715 | ||
716 | for(x = 0; x < count && x < MAXPASSFD; x++) | |
717 | { | |
718 | ctl_buf->F[x] = F[x]; | |
719 | } | |
720 | ctl_buf->nfds = count; | |
721 | rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq); | |
722 | ssl_write_ctl(ctl->F, ctl); | |
723 | } | |
724 | ||
725 | ||
726 | static void | |
727 | send_new_ssl_certs_one(ssl_ctl_t * ctl) | |
728 | { | |
729 | size_t len = 5; | |
730 | ||
731 | if(ServerInfo.ssl_cert) | |
732 | len += strlen(ServerInfo.ssl_cert); | |
733 | else | |
734 | return; | |
735 | ||
736 | if(ServerInfo.ssl_private_key) | |
737 | len += strlen(ServerInfo.ssl_private_key); | |
738 | ||
739 | if(ServerInfo.ssl_dh_params) | |
740 | len += strlen(ServerInfo.ssl_dh_params); | |
741 | ||
742 | if(ServerInfo.ssl_cipher_list) | |
743 | len += strlen(ServerInfo.ssl_cipher_list); | |
744 | ||
745 | if(len > sizeof(tmpbuf)) | |
746 | { | |
747 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, | |
748 | "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...", | |
749 | len, sizeof(tmpbuf)); | |
750 | ilog(L_MAIN, | |
751 | "Parameters for send_new_ssl_certs_one too long (%zu > %zu) to pass to ssld, not sending...", | |
752 | len, sizeof(tmpbuf)); | |
753 | return; | |
754 | } | |
755 | ||
756 | int ret = snprintf(tmpbuf, sizeof(tmpbuf), "K%c%s%c%s%c%s%c%s%c", nul, | |
757 | ServerInfo.ssl_cert, nul, | |
758 | ServerInfo.ssl_private_key != NULL ? ServerInfo.ssl_private_key : "", nul, | |
759 | ServerInfo.ssl_dh_params != NULL ? ServerInfo.ssl_dh_params : "", nul, | |
760 | ServerInfo.ssl_cipher_list != NULL ? ServerInfo.ssl_cipher_list : "", nul); | |
761 | ||
762 | if(ret > 5) | |
763 | ssl_cmd_write_queue(ctl, NULL, 0, tmpbuf, (size_t) ret); | |
764 | } | |
765 | ||
766 | static void | |
767 | send_certfp_method(ssl_ctl_t *ctl) | |
768 | { | |
769 | char buf[5]; | |
770 | ||
771 | buf[0] = 'F'; | |
772 | uint32_to_buf(&buf[1], ConfigFileEntry.certfp_method); | |
773 | ssl_cmd_write_queue(ctl, NULL, 0, buf, sizeof(buf)); | |
774 | } | |
775 | ||
776 | static void | |
777 | ssld_update_config_one(ssl_ctl_t *ctl) | |
778 | { | |
779 | send_certfp_method(ctl); | |
780 | send_new_ssl_certs_one(ctl); | |
781 | } | |
782 | ||
783 | void | |
784 | ssld_update_config(void) | |
785 | { | |
786 | rb_dlink_node *ptr; | |
787 | ||
788 | RB_DLINK_FOREACH(ptr, ssl_daemons.head) | |
789 | { | |
790 | ssl_ctl_t *ctl = ptr->data; | |
791 | ||
792 | if (ctl->dead || ctl->shutdown) | |
793 | continue; | |
794 | ||
795 | ssld_update_config_one(ctl); | |
796 | } | |
797 | } | |
798 | ||
799 | ssl_ctl_t * | |
800 | start_ssld_accept(rb_fde_t * sslF, rb_fde_t * plainF, uint32_t id) | |
801 | { | |
802 | rb_fde_t *F[2]; | |
803 | ssl_ctl_t *ctl; | |
804 | char buf[5]; | |
805 | F[0] = sslF; | |
806 | F[1] = plainF; | |
807 | ||
808 | buf[0] = 'A'; | |
809 | uint32_to_buf(&buf[1], id); | |
810 | ctl = which_ssld(); | |
811 | if(!ctl) | |
812 | return NULL; | |
813 | ctl->cli_count++; | |
814 | ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf)); | |
815 | return ctl; | |
816 | } | |
817 | ||
818 | ssl_ctl_t * | |
819 | start_ssld_connect(rb_fde_t * sslF, rb_fde_t * plainF, uint32_t id) | |
820 | { | |
821 | rb_fde_t *F[2]; | |
822 | ssl_ctl_t *ctl; | |
823 | char buf[5]; | |
824 | F[0] = sslF; | |
825 | F[1] = plainF; | |
826 | ||
827 | buf[0] = 'C'; | |
828 | uint32_to_buf(&buf[1], id); | |
829 | ||
830 | ctl = which_ssld(); | |
831 | if(!ctl) | |
832 | return NULL; | |
833 | ctl->cli_count++; | |
834 | ssl_cmd_write_queue(ctl, F, 2, buf, sizeof(buf)); | |
835 | return ctl; | |
836 | } | |
837 | ||
838 | void | |
839 | ssld_decrement_clicount(ssl_ctl_t * ctl) | |
840 | { | |
841 | if(ctl == NULL) | |
842 | return; | |
843 | ||
844 | ctl->cli_count--; | |
845 | if(ctl->shutdown && !ctl->cli_count) | |
846 | { | |
847 | ctl->dead = 1; | |
848 | rb_kill(ctl->pid, SIGKILL); | |
849 | } | |
850 | if(ctl->dead && !ctl->cli_count) | |
851 | { | |
852 | free_ssl_daemon(ctl); | |
853 | } | |
854 | } | |
855 | ||
856 | /* | |
857 | * what we end up sending to the ssld process for ziplinks is the following | |
858 | * Z[ourfd][level][RECVQ] | |
859 | * Z = ziplinks command = buf[0] | |
860 | * ourfd = Our end of the socketpair = buf[1..4] | |
861 | * level = zip level buf[5] | |
862 | * recvqlen = our recvq len = buf[6-7] | |
863 | * recvq = any data we read prior to starting ziplinks | |
864 | */ | |
865 | void | |
866 | start_zlib_session(void *data) | |
867 | { | |
868 | struct Client *server = (struct Client *) data; | |
869 | uint16_t recvqlen; | |
870 | uint8_t level; | |
871 | void *xbuf; | |
872 | ||
873 | rb_fde_t *F[2]; | |
874 | rb_fde_t *xF1, *xF2; | |
875 | char *buf; | |
876 | void *recvq_start; | |
877 | ||
878 | size_t hdr = (sizeof(uint8_t) * 2) + sizeof(uint32_t); | |
879 | size_t len; | |
880 | int cpylen, left; | |
881 | ||
882 | server->localClient->event = NULL; | |
883 | ||
884 | recvqlen = rb_linebuf_len(&server->localClient->buf_recvq); | |
885 | ||
886 | len = recvqlen + hdr; | |
887 | ||
888 | if(len > READBUF_SIZE) | |
889 | { | |
890 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, | |
891 | "ssld - attempted to pass message of %zd len, max len %d, giving up", | |
892 | len, READBUF_SIZE); | |
893 | ilog(L_MAIN, "ssld - attempted to pass message of %zd len, max len %d, giving up", len, READBUF_SIZE); | |
894 | exit_client(server, server, server, "ssld readbuf exceeded"); | |
895 | return; | |
896 | } | |
897 | ||
898 | buf = rb_malloc(len); | |
899 | level = ConfigFileEntry.compression_level; | |
900 | ||
901 | uint32_to_buf(&buf[1], rb_get_fd(server->localClient->F)); | |
902 | buf[5] = (char) level; | |
903 | ||
904 | recvq_start = &buf[6]; | |
905 | server->localClient->zipstats = rb_malloc(sizeof(struct ZipStats)); | |
906 | ||
907 | xbuf = recvq_start; | |
908 | left = recvqlen; | |
909 | ||
910 | do | |
911 | { | |
912 | cpylen = rb_linebuf_get(&server->localClient->buf_recvq, xbuf, left, LINEBUF_PARTIAL, LINEBUF_RAW); | |
913 | left -= cpylen; | |
914 | xbuf = (void *) (((uintptr_t) xbuf) + cpylen); | |
915 | } | |
916 | while(cpylen > 0); | |
917 | ||
918 | /* Pass the socket to ssld. */ | |
919 | *buf = 'Z'; | |
920 | if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF1, &xF2, "Initial zlib socketpairs") == -1) | |
921 | { | |
922 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Error creating zlib socketpair - %s", strerror(errno)); | |
923 | ilog(L_MAIN, "Error creating zlib socketpairs - %s", strerror(errno)); | |
924 | exit_client(server, server, server, "Error creating zlib socketpair"); | |
925 | rb_free(buf); | |
926 | return; | |
927 | } | |
928 | ||
929 | F[0] = server->localClient->F; | |
930 | F[1] = xF1; | |
931 | server->localClient->F = xF2; | |
932 | /* need to redo as what we did before isn't valid now */ | |
933 | uint32_to_buf(&buf[1], connid_get(server)); | |
934 | ||
935 | server->localClient->z_ctl = which_ssld(); | |
936 | if(!server->localClient->z_ctl) | |
937 | { | |
938 | exit_client(server, server, server, "Error finding available ssld"); | |
939 | rb_free(buf); | |
940 | return; | |
941 | } | |
942 | server->localClient->z_ctl->cli_count++; | |
943 | ssl_cmd_write_queue(server->localClient->z_ctl, F, 2, buf, len); | |
944 | rb_free(buf); | |
945 | } | |
946 | ||
947 | static void | |
948 | collect_zipstats(void *unused) | |
949 | { | |
950 | rb_dlink_node *ptr; | |
951 | struct Client *target_p; | |
952 | char buf[sizeof(uint8_t) + sizeof(uint32_t) + HOSTLEN]; | |
953 | void *odata; | |
954 | size_t len; | |
955 | uint32_t id; | |
956 | ||
957 | buf[0] = 'S'; | |
958 | odata = buf + sizeof(uint8_t) + sizeof(uint32_t); | |
959 | ||
960 | RB_DLINK_FOREACH(ptr, serv_list.head) | |
961 | { | |
962 | target_p = ptr->data; | |
963 | if(IsCapable(target_p, CAP_ZIP)) | |
964 | { | |
965 | len = sizeof(uint8_t) + sizeof(uint32_t); | |
966 | ||
967 | id = rb_get_fd(target_p->localClient->F); | |
968 | uint32_to_buf(&buf[1], id); | |
969 | rb_strlcpy(odata, target_p->name, (sizeof(buf) - len)); | |
970 | len += strlen(odata) + 1; /* Get the \0 as well */ | |
971 | ssl_cmd_write_queue(target_p->localClient->z_ctl, NULL, 0, buf, len); | |
972 | } | |
973 | } | |
974 | } | |
975 | ||
976 | static void | |
977 | cleanup_dead_ssl(void *unused) | |
978 | { | |
979 | rb_dlink_node *ptr, *next; | |
980 | ssl_ctl_t *ctl; | |
981 | RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head) | |
982 | { | |
983 | ctl = ptr->data; | |
984 | if(ctl->dead && !ctl->cli_count) | |
985 | { | |
986 | free_ssl_daemon(ctl); | |
987 | } | |
988 | } | |
989 | } | |
990 | ||
991 | int | |
992 | get_ssld_count(void) | |
993 | { | |
994 | return ssld_count; | |
995 | } | |
996 | ||
997 | void | |
998 | ssld_foreach_info(void (*func)(void *data, pid_t pid, int cli_count, enum ssld_status status, const char *version), void *data) | |
999 | { | |
1000 | rb_dlink_node *ptr, *next; | |
1001 | ssl_ctl_t *ctl; | |
1002 | RB_DLINK_FOREACH_SAFE(ptr, next, ssl_daemons.head) | |
1003 | { | |
1004 | ctl = ptr->data; | |
1005 | func(data, ctl->pid, ctl->cli_count, | |
1006 | ctl->dead ? SSLD_DEAD : | |
1007 | (ctl->shutdown ? SSLD_SHUTDOWN : SSLD_ACTIVE), | |
1008 | ctl->version); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | void | |
1013 | init_ssld(void) | |
1014 | { | |
1015 | rb_event_addish("collect_zipstats", collect_zipstats, NULL, ZIPSTATS_TIME); | |
1016 | rb_event_addish("cleanup_dead_ssld", cleanup_dead_ssl, NULL, 60); | |
1017 | } |