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Commit | Line | Data |
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54ac8b60 VY |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * listener.c: Listens on a port. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
54ac8b60 VY |
23 | */ |
24 | ||
25 | #include "stdinc.h" | |
26 | #include "setup.h" | |
27 | #include "listener.h" | |
28 | #include "client.h" | |
4562c604 | 29 | #include "match.h" |
54ac8b60 VY |
30 | #include "ircd.h" |
31 | #include "ircd_defs.h" | |
32 | #include "numeric.h" | |
33 | #include "s_conf.h" | |
34 | #include "s_newconf.h" | |
35 | #include "s_stats.h" | |
36 | #include "send.h" | |
64fae260 | 37 | #include "authproc.h" |
54ac8b60 VY |
38 | #include "reject.h" |
39 | #include "s_conf.h" | |
40 | #include "hostmask.h" | |
c6d72037 | 41 | #include "sslproc.h" |
c53ca1e0 | 42 | #include "wsproc.h" |
c6d72037 | 43 | #include "hash.h" |
77d3d2db KB |
44 | #include "s_assert.h" |
45 | #include "logger.h" | |
54ac8b60 VY |
46 | |
47 | #ifndef INADDR_NONE | |
48 | #define INADDR_NONE ((unsigned int) 0xffffffff) | |
49 | #endif | |
50 | ||
9ea3ea10 | 51 | #if defined(NO_IN6ADDR_ANY) && defined(RB_IPV6) |
54ac8b60 VY |
52 | static const struct in6_addr in6addr_any = |
53 | { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }; | |
55abcbb2 | 54 | #endif |
54ac8b60 | 55 | |
8f103562 | 56 | static struct Listener *ListenerPollList = NULL; |
1087485c | 57 | static int accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, void *data); |
8e09c4a2 | 58 | static void accept_callback(rb_fde_t *F, int status, struct sockaddr *addr, rb_socklen_t addrlen, void *data); |
54ac8b60 | 59 | |
8f103562 | 60 | static struct Listener * |
e7046ee5 | 61 | make_listener(struct rb_sockaddr_storage *addr) |
54ac8b60 | 62 | { |
8f103562 | 63 | struct Listener *listener = (struct Listener *) rb_malloc(sizeof(struct Listener)); |
54ac8b60 | 64 | s_assert(0 != listener); |
54ac8b60 | 65 | listener->name = me.name; |
f691939a VY |
66 | listener->F = NULL; |
67 | ||
e7046ee5 | 68 | memcpy(&listener->addr, addr, sizeof(struct rb_sockaddr_storage)); |
54ac8b60 VY |
69 | listener->next = NULL; |
70 | return listener; | |
71 | } | |
72 | ||
73 | void | |
8f103562 | 74 | free_listener(struct Listener *listener) |
54ac8b60 VY |
75 | { |
76 | s_assert(NULL != listener); | |
77 | if(listener == NULL) | |
78 | return; | |
79 | /* | |
80 | * remove from listener list | |
81 | */ | |
82 | if(listener == ListenerPollList) | |
83 | ListenerPollList = listener->next; | |
84 | else | |
85 | { | |
8f103562 | 86 | struct Listener *prev = ListenerPollList; |
54ac8b60 VY |
87 | for (; prev; prev = prev->next) |
88 | { | |
89 | if(listener == prev->next) | |
90 | { | |
91 | prev->next = listener->next; | |
92 | break; | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
97 | /* free */ | |
98 | rb_free(listener); | |
99 | } | |
100 | ||
101 | #define PORTNAMELEN 6 /* ":31337" */ | |
102 | ||
40173bcb JT |
103 | /* |
104 | * get_listener_port - return displayable listener port | |
105 | */ | |
106 | static uint16_t | |
107 | get_listener_port(const struct Listener *listener) | |
108 | { | |
d86692fa | 109 | return ntohs(GET_SS_PORT(&listener->addr)); |
40173bcb JT |
110 | } |
111 | ||
54ac8b60 VY |
112 | /* |
113 | * get_listener_name - return displayable listener name and port | |
114 | * returns "host.foo.org:6667" for a given listener | |
115 | */ | |
116 | const char * | |
8f103562 | 117 | get_listener_name(const struct Listener *listener) |
54ac8b60 VY |
118 | { |
119 | static char buf[HOSTLEN + HOSTLEN + PORTNAMELEN + 4]; | |
54ac8b60 VY |
120 | |
121 | s_assert(NULL != listener); | |
122 | if(listener == NULL) | |
123 | return NULL; | |
124 | ||
5203cba5 | 125 | snprintf(buf, sizeof(buf), "%s[%s/%u]", |
40173bcb | 126 | me.name, listener->name, get_listener_port(listener)); |
54ac8b60 VY |
127 | return buf; |
128 | } | |
129 | ||
130 | /* | |
131 | * show_ports - send port listing to a client | |
132 | * inputs - pointer to client to show ports to | |
133 | * output - none | |
134 | * side effects - show ports | |
135 | */ | |
136 | void | |
137 | show_ports(struct Client *source_p) | |
138 | { | |
8f103562 | 139 | struct Listener *listener = 0; |
54ac8b60 VY |
140 | |
141 | for (listener = ListenerPollList; listener; listener = listener->next) | |
142 | { | |
55abcbb2 | 143 | sendto_one_numeric(source_p, RPL_STATSPLINE, |
40173bcb JT |
144 | form_str(RPL_STATSPLINE), 'P', |
145 | get_listener_port(listener), | |
54ac8b60 | 146 | IsOperAdmin(source_p) ? listener->name : me.name, |
8bd5767b | 147 | listener->ref_count, (listener->active) ? "active" : "disabled", |
c6d72037 | 148 | listener->ssl ? " ssl" : ""); |
54ac8b60 VY |
149 | } |
150 | } | |
151 | ||
152 | /* | |
153 | * inetport - create a listener socket in the AF_INET or AF_INET6 domain, | |
154 | * bind it to the port given in 'port' and listen to it | |
155 | * returns true (1) if successful false (0) on error. | |
156 | * | |
157 | * If the operating system has a define for SOMAXCONN, use it, otherwise | |
638d2862 | 158 | * use CHARYBDIS_SOMAXCONN |
54ac8b60 VY |
159 | */ |
160 | #ifdef SOMAXCONN | |
638d2862 EM |
161 | #undef CHARYBDIS_SOMAXCONN |
162 | #define CHARYBDIS_SOMAXCONN SOMAXCONN | |
54ac8b60 VY |
163 | #endif |
164 | ||
165 | static int | |
8f103562 | 166 | inetport(struct Listener *listener) |
54ac8b60 | 167 | { |
f691939a | 168 | rb_fde_t *F; |
54ac8b60 | 169 | int opt = 1; |
40173bcb | 170 | const char *errstr; |
54ac8b60 VY |
171 | |
172 | /* | |
173 | * At first, open a new socket | |
174 | */ | |
55abcbb2 | 175 | |
f691939a | 176 | F = rb_socket(GET_SS_FAMILY(&listener->addr), SOCK_STREAM, 0, "Listener socket"); |
54ac8b60 | 177 | |
9ea3ea10 | 178 | #ifdef RB_IPV6 |
e867208d | 179 | if(GET_SS_FAMILY(&listener->addr) == AF_INET6) |
54ac8b60 VY |
180 | { |
181 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)&listener->addr; | |
182 | if(!IN6_ARE_ADDR_EQUAL(&in6->sin6_addr, &in6addr_any)) | |
183 | { | |
caa4d9d2 | 184 | rb_inet_ntop(AF_INET6, &in6->sin6_addr, listener->vhost, sizeof(listener->vhost)); |
54ac8b60 VY |
185 | listener->name = listener->vhost; |
186 | } | |
187 | } else | |
188 | #endif | |
189 | { | |
190 | struct sockaddr_in *in = (struct sockaddr_in *)&listener->addr; | |
191 | if(in->sin_addr.s_addr != INADDR_ANY) | |
192 | { | |
caa4d9d2 | 193 | rb_inet_ntop(AF_INET, &in->sin_addr, listener->vhost, sizeof(listener->vhost)); |
54ac8b60 | 194 | listener->name = listener->vhost; |
55abcbb2 | 195 | } |
54ac8b60 VY |
196 | } |
197 | ||
1087485c JT |
198 | if(F == NULL) |
199 | { | |
40173bcb JT |
200 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
201 | "Cannot open socket for listener on port %d", | |
202 | get_listener_port(listener)); | |
203 | ilog(L_MAIN, "Cannot open socket for listener %s", | |
204 | get_listener_name(listener)); | |
1087485c JT |
205 | return 0; |
206 | } | |
207 | else if((maxconnections - 10) < rb_get_fd(F)) /* XXX this is kinda bogus*/ | |
208 | { | |
825ddf13 | 209 | ilog_error("no more connections left for listener"); |
40173bcb JT |
210 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
211 | "No more connections left for listener on port %d", | |
212 | get_listener_port(listener)); | |
213 | ilog(L_MAIN, "No more connections left for listener %s", | |
214 | get_listener_name(listener)); | |
1087485c JT |
215 | rb_close(F); |
216 | return 0; | |
54ac8b60 VY |
217 | } |
218 | ||
1087485c JT |
219 | /* |
220 | * XXX - we don't want to do all this crap for a listener | |
221 | * set_sock_opts(listener); | |
bf3ecca2 EM |
222 | * |
223 | * FIXME - doesn't this belong in librb? --Elizafox | |
1087485c JT |
224 | */ |
225 | if(setsockopt(rb_get_fd(F), SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof(opt))) | |
226 | { | |
40173bcb JT |
227 | errstr = strerror(rb_get_sockerr(F)); |
228 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
229 | "Cannot set SO_REUSEADDR for listener on port %d: %s", | |
230 | get_listener_port(listener), errstr); | |
231 | ilog(L_MAIN, "Cannot set SO_REUSEADDR for listener %s: %s", | |
232 | get_listener_name(listener), errstr); | |
1087485c JT |
233 | rb_close(F); |
234 | return 0; | |
54ac8b60 VY |
235 | } |
236 | ||
bf3ecca2 | 237 | /* FIXME - doesn't this belong in librb? --Elizafox */ |
1087485c JT |
238 | if(bind(rb_get_fd(F), (struct sockaddr *) &listener->addr, GET_SS_LEN(&listener->addr))) |
239 | { | |
40173bcb JT |
240 | errstr = strerror(rb_get_sockerr(F)); |
241 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
242 | "Cannot bind for listener on port %d: %s", | |
243 | get_listener_port(listener), errstr); | |
244 | ilog(L_MAIN, "Cannot bind for listener %s: %s", | |
245 | get_listener_name(listener), errstr); | |
1087485c JT |
246 | rb_close(F); |
247 | return 0; | |
54ac8b60 VY |
248 | } |
249 | ||
638d2862 | 250 | if(rb_listen(F, CHARYBDIS_SOMAXCONN, listener->defer_accept)) |
1087485c | 251 | { |
40173bcb JT |
252 | errstr = strerror(rb_get_sockerr(F)); |
253 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
254 | "Cannot listen() for listener on port %d: %s", | |
255 | get_listener_port(listener), errstr); | |
256 | ilog(L_MAIN, "Cannot listen() for listener %s: %s", | |
257 | get_listener_name(listener), errstr); | |
1087485c JT |
258 | rb_close(F); |
259 | return 0; | |
54ac8b60 VY |
260 | } |
261 | ||
1087485c JT |
262 | listener->F = F; |
263 | ||
f691939a | 264 | rb_accept_tcp(listener->F, accept_precallback, accept_callback, listener); |
54ac8b60 VY |
265 | return 1; |
266 | } | |
267 | ||
8f103562 | 268 | static struct Listener * |
e7046ee5 | 269 | find_listener(struct rb_sockaddr_storage *addr) |
54ac8b60 | 270 | { |
8f103562 JT |
271 | struct Listener *listener = NULL; |
272 | struct Listener *last_closed = NULL; | |
54ac8b60 VY |
273 | |
274 | for (listener = ListenerPollList; listener; listener = listener->next) | |
275 | { | |
e867208d | 276 | if(GET_SS_FAMILY(addr) != GET_SS_FAMILY(&listener->addr)) |
54ac8b60 | 277 | continue; |
55abcbb2 | 278 | |
a7fb2693 | 279 | switch(GET_SS_FAMILY(addr)) |
54ac8b60 VY |
280 | { |
281 | case AF_INET: | |
282 | { | |
283 | struct sockaddr_in *in4 = (struct sockaddr_in *)addr; | |
284 | struct sockaddr_in *lin4 = (struct sockaddr_in *)&listener->addr; | |
55abcbb2 | 285 | if(in4->sin_addr.s_addr == lin4->sin_addr.s_addr && |
54ac8b60 VY |
286 | in4->sin_port == lin4->sin_port ) |
287 | { | |
1087485c JT |
288 | if(listener->F == NULL) |
289 | last_closed = listener; | |
290 | else | |
54ac8b60 VY |
291 | return(listener); |
292 | } | |
293 | break; | |
294 | } | |
9ea3ea10 | 295 | #ifdef RB_IPV6 |
54ac8b60 VY |
296 | case AF_INET6: |
297 | { | |
298 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr; | |
299 | struct sockaddr_in6 *lin6 =(struct sockaddr_in6 *)&listener->addr; | |
300 | if(IN6_ARE_ADDR_EQUAL(&in6->sin6_addr, &lin6->sin6_addr) && | |
301 | in6->sin6_port == lin6->sin6_port) | |
302 | { | |
1087485c JT |
303 | if(listener->F == NULL) |
304 | last_closed = listener; | |
305 | else | |
54ac8b60 VY |
306 | return(listener); |
307 | } | |
308 | break; | |
55abcbb2 | 309 | |
54ac8b60 VY |
310 | } |
311 | #endif | |
312 | ||
313 | default: | |
314 | break; | |
315 | } | |
316 | } | |
317 | return last_closed; | |
318 | } | |
319 | ||
320 | ||
321 | /* | |
322 | * add_listener- create a new listener | |
323 | * port - the port number to listen on | |
324 | * vhost_ip - if non-null must contain a valid IP address string in | |
325 | * the format "255.255.255.255" | |
326 | */ | |
327 | void | |
c53ca1e0 | 328 | add_listener(int port, const char *vhost_ip, int family, int ssl, int defer_accept, int wsock) |
54ac8b60 | 329 | { |
8f103562 | 330 | struct Listener *listener; |
e7046ee5 | 331 | struct rb_sockaddr_storage vaddr; |
54ac8b60 VY |
332 | |
333 | /* | |
334 | * if no port in conf line, don't bother | |
335 | */ | |
336 | if(port == 0) | |
337 | return; | |
338 | memset(&vaddr, 0, sizeof(vaddr)); | |
e867208d | 339 | SET_SS_FAMILY(&vaddr, family); |
54ac8b60 VY |
340 | |
341 | if(vhost_ip != NULL) | |
342 | { | |
343 | if(family == AF_INET) | |
344 | { | |
caa4d9d2 | 345 | if(rb_inet_pton(family, vhost_ip, &((struct sockaddr_in *)&vaddr)->sin_addr) <= 0) |
54ac8b60 | 346 | return; |
55abcbb2 | 347 | } |
9ea3ea10 | 348 | #ifdef RB_IPV6 |
54ac8b60 VY |
349 | else |
350 | { | |
caa4d9d2 | 351 | if(rb_inet_pton(family, vhost_ip, &((struct sockaddr_in6 *)&vaddr)->sin6_addr) <= 0) |
54ac8b60 | 352 | return; |
55abcbb2 | 353 | |
54ac8b60 VY |
354 | } |
355 | #endif | |
356 | } else | |
357 | { | |
358 | switch(family) | |
359 | { | |
360 | case AF_INET: | |
361 | ((struct sockaddr_in *)&vaddr)->sin_addr.s_addr = INADDR_ANY; | |
362 | break; | |
9ea3ea10 | 363 | #ifdef RB_IPV6 |
54ac8b60 VY |
364 | case AF_INET6: |
365 | memcpy(&((struct sockaddr_in6 *)&vaddr)->sin6_addr, &in6addr_any, sizeof(struct in6_addr)); | |
366 | break; | |
367 | default: | |
368 | return; | |
369 | #endif | |
55abcbb2 | 370 | } |
54ac8b60 VY |
371 | } |
372 | switch(family) | |
373 | { | |
374 | case AF_INET: | |
99c4835f | 375 | SET_SS_LEN(&vaddr, sizeof(struct sockaddr_in)); |
d86692fa EM |
376 | SET_SS_FAMILY(&vaddr, AF_INET); |
377 | SET_SS_PORT(&vaddr, htons(port)); | |
54ac8b60 | 378 | break; |
9ea3ea10 | 379 | #ifdef RB_IPV6 |
54ac8b60 | 380 | case AF_INET6: |
99c4835f | 381 | SET_SS_LEN(&vaddr, sizeof(struct sockaddr_in6)); |
d86692fa EM |
382 | SET_SS_FAMILY(&vaddr, AF_INET6); |
383 | SET_SS_PORT(&vaddr, htons(port)); | |
54ac8b60 VY |
384 | break; |
385 | #endif | |
386 | default: | |
387 | break; | |
388 | } | |
389 | if((listener = find_listener(&vaddr))) | |
390 | { | |
1087485c | 391 | if(listener->F != NULL) |
54ac8b60 VY |
392 | return; |
393 | } | |
394 | else | |
395 | { | |
396 | listener = make_listener(&vaddr); | |
397 | listener->next = ListenerPollList; | |
398 | ListenerPollList = listener; | |
399 | } | |
400 | ||
f691939a | 401 | listener->F = NULL; |
c6d72037 | 402 | listener->ssl = ssl; |
02270e96 | 403 | listener->defer_accept = defer_accept; |
c53ca1e0 | 404 | listener->wsock = wsock; |
54ac8b60 VY |
405 | |
406 | if(inetport(listener)) | |
407 | listener->active = 1; | |
408 | else | |
409 | close_listener(listener); | |
410 | } | |
411 | ||
412 | /* | |
413 | * close_listener - close a single listener | |
414 | */ | |
415 | void | |
8f103562 | 416 | close_listener(struct Listener *listener) |
54ac8b60 VY |
417 | { |
418 | s_assert(listener != NULL); | |
419 | if(listener == NULL) | |
420 | return; | |
1087485c JT |
421 | if(listener->F != NULL) |
422 | { | |
423 | rb_close(listener->F); | |
424 | listener->F = NULL; | |
54ac8b60 VY |
425 | } |
426 | ||
427 | listener->active = 0; | |
428 | ||
429 | if(listener->ref_count) | |
430 | return; | |
431 | ||
432 | free_listener(listener); | |
433 | } | |
434 | ||
435 | /* | |
436 | * close_listeners - close and free all listeners that are not being used | |
437 | */ | |
438 | void | |
439 | close_listeners() | |
440 | { | |
8f103562 JT |
441 | struct Listener *listener; |
442 | struct Listener *listener_next = 0; | |
54ac8b60 VY |
443 | /* |
444 | * close all 'extra' listening ports we have | |
445 | */ | |
446 | for (listener = ListenerPollList; listener; listener = listener_next) | |
447 | { | |
448 | listener_next = listener->next; | |
449 | close_listener(listener); | |
450 | } | |
451 | } | |
452 | ||
453 | #define DLINE_WARNING "ERROR :You have been D-lined.\r\n" | |
454 | ||
455 | /* | |
55abcbb2 | 456 | * add_connection - creates a client which has just connected to us on |
54ac8b60 VY |
457 | * the given fd. The sockhost field is initialized with the ip# of the host. |
458 | * The client is sent to the auth module for verification, and not put in | |
459 | * any client list yet. | |
460 | */ | |
1087485c | 461 | static void |
b5b4a0e7 | 462 | add_connection(struct Listener *listener, rb_fde_t *F, struct sockaddr *sai, struct sockaddr *lai) |
54ac8b60 VY |
463 | { |
464 | struct Client *new_client; | |
465 | s_assert(NULL != listener); | |
466 | ||
55abcbb2 | 467 | /* |
54ac8b60 VY |
468 | * get the client socket name from the socket |
469 | * the client has already been checked out in accept_connection | |
470 | */ | |
471 | new_client = make_client(NULL); | |
472 | ||
b5b4a0e7 AC |
473 | if (listener->ssl) |
474 | { | |
475 | rb_fde_t *xF[2]; | |
476 | if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF[0], &xF[1], "Incoming ssld Connection") == -1) | |
477 | { | |
478 | free_client(new_client); | |
479 | return; | |
480 | } | |
de7cf7e0 | 481 | new_client->localClient->ssl_ctl = start_ssld_accept(F, xF[1], connid_get(new_client)); /* this will close F for us */ |
b5b4a0e7 AC |
482 | if(new_client->localClient->ssl_ctl == NULL) |
483 | { | |
484 | free_client(new_client); | |
485 | return; | |
486 | } | |
487 | F = xF[0]; | |
488 | SetSSL(new_client); | |
489 | } | |
490 | ||
c53ca1e0 AC |
491 | if (listener->wsock) |
492 | { | |
493 | rb_fde_t *xF[2]; | |
494 | if(rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &xF[0], &xF[1], "Incoming wsockd Connection") == -1) | |
495 | { | |
496 | free_client(new_client); | |
497 | return; | |
498 | } | |
499 | new_client->localClient->ws_ctl = start_wsockd_accept(F, xF[1], connid_get(new_client)); /* this will close F for us */ | |
500 | if(new_client->localClient->ws_ctl == NULL) | |
501 | { | |
502 | free_client(new_client); | |
503 | return; | |
504 | } | |
505 | F = xF[0]; | |
506 | } | |
507 | ||
e7046ee5 | 508 | memcpy(&new_client->localClient->ip, sai, sizeof(struct rb_sockaddr_storage)); |
3540120a | 509 | memcpy(&new_client->preClient->lip, lai, sizeof(struct rb_sockaddr_storage)); |
54ac8b60 | 510 | |
55abcbb2 | 511 | /* |
54ac8b60 VY |
512 | * copy address to 'sockhost' as a string, copy it to host too |
513 | * so we have something valid to put into error messages... | |
514 | */ | |
55abcbb2 | 515 | rb_inet_ntop_sock((struct sockaddr *)&new_client->localClient->ip, new_client->sockhost, |
54ac8b60 VY |
516 | sizeof(new_client->sockhost)); |
517 | ||
518 | ||
f427c8b0 | 519 | rb_strlcpy(new_client->host, new_client->sockhost, sizeof(new_client->host)); |
54ac8b60 | 520 | |
99c4835f | 521 | new_client->localClient->F = F; |
54ac8b60 | 522 | new_client->localClient->listener = listener; |
c6d72037 | 523 | |
54ac8b60 VY |
524 | ++listener->ref_count; |
525 | ||
d3f6b808 | 526 | authd_initiate_client(new_client); |
54ac8b60 | 527 | } |
0d89d5cd | 528 | |
43946961 JT |
529 | static const char *toofast = "ERROR :Reconnecting too fast, throttled.\r\n"; |
530 | ||
1087485c JT |
531 | static int |
532 | accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, void *data) | |
533 | { | |
534 | struct Listener *listener = (struct Listener *)data; | |
535 | char buf[BUFSIZE]; | |
536 | struct ConfItem *aconf; | |
537 | static time_t last_oper_notice = 0; | |
b52c2949 | 538 | int len; |
1087485c | 539 | |
bfc44622 | 540 | if(listener->ssl && (!ircd_ssl_ok || !get_ssld_count())) |
8bd5767b JT |
541 | { |
542 | rb_close(F); | |
543 | return 0; | |
c6d72037 VY |
544 | } |
545 | ||
1087485c JT |
546 | if((maxconnections - 10) < rb_get_fd(F)) /* XXX this is kinda bogus */ |
547 | { | |
47adde3d | 548 | ++ServerStats.is_ref; |
1087485c JT |
549 | /* |
550 | * slow down the whining to opers bit | |
551 | */ | |
552 | if((last_oper_notice + 20) <= rb_current_time()) | |
553 | { | |
26716d6d | 554 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
1087485c JT |
555 | "All connections in use. (%s)", |
556 | get_listener_name(listener)); | |
557 | last_oper_notice = rb_current_time(); | |
558 | } | |
55abcbb2 | 559 | |
76d82c19 | 560 | rb_write(F, "ERROR :All connections in use\r\n", 31); |
1087485c | 561 | rb_close(F); |
1087485c JT |
562 | return 0; |
563 | } | |
564 | ||
41d7fefa | 565 | aconf = find_dline(addr, addr->sa_family); |
1087485c JT |
566 | if(aconf != NULL && (aconf->status & CONF_EXEMPTDLINE)) |
567 | return 1; | |
55abcbb2 | 568 | |
1087485c JT |
569 | /* Do an initial check we aren't connecting too fast or with too many |
570 | * from this IP... */ | |
571 | if(aconf != NULL) | |
572 | { | |
47adde3d | 573 | ServerStats.is_ref++; |
55abcbb2 | 574 | |
1087485c JT |
575 | if(ConfigFileEntry.dline_with_reason) |
576 | { | |
5203cba5 | 577 | len = snprintf(buf, sizeof(buf), "ERROR :*** Banned: %s\r\n", get_user_ban_reason(aconf)); |
b52c2949 | 578 | if (len >= (int)(sizeof(buf)-1)) |
1087485c JT |
579 | { |
580 | buf[sizeof(buf) - 3] = '\r'; | |
581 | buf[sizeof(buf) - 2] = '\n'; | |
582 | buf[sizeof(buf) - 1] = '\0'; | |
583 | } | |
584 | } | |
585 | else | |
586 | strcpy(buf, "ERROR :You have been D-lined.\r\n"); | |
55abcbb2 | 587 | |
1087485c JT |
588 | rb_write(F, buf, strlen(buf)); |
589 | rb_close(F); | |
590 | return 0; | |
591 | } | |
592 | ||
43946961 JT |
593 | if(check_reject(F, addr)) |
594 | return 0; | |
55abcbb2 | 595 | |
43946961 JT |
596 | if(throttle_add(addr)) |
597 | { | |
598 | rb_write(F, toofast, strlen(toofast)); | |
599 | rb_close(F); | |
600 | return 0; | |
601 | } | |
602 | ||
1087485c JT |
603 | return 1; |
604 | } | |
605 | ||
606 | static void | |
607 | accept_callback(rb_fde_t *F, int status, struct sockaddr *addr, rb_socklen_t addrlen, void *data) | |
608 | { | |
609 | struct Listener *listener = data; | |
610 | struct rb_sockaddr_storage lip; | |
611 | unsigned int locallen = sizeof(struct rb_sockaddr_storage); | |
55abcbb2 | 612 | |
47adde3d | 613 | ServerStats.is_ac++; |
1087485c JT |
614 | |
615 | if(getsockname(rb_get_fd(F), (struct sockaddr *) &lip, &locallen) < 0) | |
616 | { | |
d60a42a2 | 617 | /* this can fail if the connection disappeared in the meantime */ |
1087485c | 618 | rb_close(F); |
9692f954 | 619 | return; |
1087485c | 620 | } |
55abcbb2 | 621 | |
b5b4a0e7 | 622 | add_connection(listener, F, addr, (struct sockaddr *)&lip); |
0d89d5cd | 623 | } |