1 |
/* |
2 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
3 |
* s_bsd.c: Network functions. |
4 |
* |
5 |
* Copyright (C) 2002 by the past and present ircd coders, and others. |
6 |
* Copyright (C) 1999 Thomas Helvey |
7 |
* |
8 |
* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
10 |
* the Free Software Foundation; either version 2 of the License, or |
11 |
* (at your option) any later version. |
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* |
13 |
* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
19 |
* along with this program; if not, write to the Free Software |
20 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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* $Id$ |
24 |
*/ |
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|
26 |
#include "stdinc.h" |
27 |
#include <netinet/in_systm.h> |
28 |
#include <netinet/ip.h> |
29 |
#include <netinet/tcp.h> |
30 |
#include <sys/uio.h> |
31 |
#include "ircd_defs.h" |
32 |
#include "list.h" |
33 |
#include "s_bsd.h" |
34 |
#include "parse.h" |
35 |
#include "client.h" |
36 |
#include "dbuf.h" |
37 |
#include "irc_string.h" |
38 |
#include "ircd.h" |
39 |
#include "listener.h" |
40 |
#include "numeric.h" |
41 |
#include "packet.h" |
42 |
#include "irc_res.h" |
43 |
#include "restart.h" |
44 |
#include "s_auth.h" |
45 |
#include "conf.h" |
46 |
#include "log.h" |
47 |
#include "s_serv.h" |
48 |
#include "send.h" |
49 |
#include "memory.h" |
50 |
#include "s_user.h" |
51 |
#include "msgq.h" |
52 |
#include "ioengine.h" |
53 |
#include "dbuf.h" |
54 |
#include "hash.h" |
55 |
|
56 |
|
57 |
#ifndef IOV_MAX |
58 |
#define IOV_MAX 16 /**< Minimum required length of an iovec array */ |
59 |
#endif |
60 |
|
61 |
|
62 |
dlink_list connection_list; |
63 |
|
64 |
static void client_sock_callback(struct Event *); |
65 |
static void client_timer_callback(struct Event *); |
66 |
|
67 |
/** Temporary buffer for reading data from a peer. */ |
68 |
static char readbuf[SERVER_TCP_WINDOW]; |
69 |
|
70 |
/* |
71 |
* report_error text constants |
72 |
*/ |
73 |
const char *const ACCEPT_ERROR_MSG = "error accepting connection for %s: %s"; |
74 |
const char *const BIND_ERROR_MSG = "bind error for %s: %s"; |
75 |
const char *const CONNECT_ERROR_MSG = "connect to host %s failed: %s"; |
76 |
const char *const CONNLIMIT_ERROR_MSG = "connect limit exceeded for %s: %s"; |
77 |
const char *const LISTEN_ERROR_MSG = "listen error for %s: %s"; |
78 |
const char *const NONB_ERROR_MSG = "error setting non-blocking for %s: %s"; |
79 |
const char *const PEERNAME_ERROR_MSG = "getpeername failed for %s: %s"; |
80 |
const char *const POLL_ERROR_MSG = "poll error for %s: %s"; |
81 |
const char *const REGISTER_ERROR_MSG = "registering %s: %s"; |
82 |
const char *const REUSEADDR_ERROR_MSG = "error setting SO_REUSEADDR for %s: %s"; |
83 |
const char *const SELECT_ERROR_MSG = "select error for %s: %s"; |
84 |
const char *const SETBUFS_ERROR_MSG = "error setting buffer size for %s: %s"; |
85 |
const char *const SOCKET_ERROR_MSG = "error creating socket for %s: %s"; |
86 |
const char *const TOS_ERROR_MSG = "error setting TOS for %s: %s"; |
87 |
|
88 |
|
89 |
static int |
90 |
is_blocked(int error) |
91 |
{ |
92 |
return EWOULDBLOCK == error |
93 |
#ifdef ENOMEM |
94 |
|| ENOMEM == error |
95 |
#endif |
96 |
#ifdef ENOBUFS |
97 |
|| ENOBUFS == error |
98 |
#endif |
99 |
|| EAGAIN == error; |
100 |
} |
101 |
|
102 |
/* get_sockerr - get the error value from the socket or the current errno |
103 |
* |
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* Get the *real* error from the socket (well try to anyway..). |
105 |
* This may only work when SO_DEBUG is enabled but its worth the |
106 |
* gamble anyway. |
107 |
*/ |
108 |
int |
109 |
os_get_sockerr(int fd) |
110 |
{ |
111 |
int errtmp = errno; |
112 |
#ifdef SO_ERROR |
113 |
int err = 0; |
114 |
socklen_t len = sizeof(err); |
115 |
|
116 |
if (-1 < fd && !getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len)) |
117 |
{ |
118 |
if (err) |
119 |
errtmp = err; |
120 |
} |
121 |
errno = errtmp; |
122 |
#endif |
123 |
return errtmp; |
124 |
} |
125 |
|
126 |
/** Set a file descriptor to non-blocking mode. |
127 |
* @param[in] fd %Socket file descriptor. |
128 |
* @return Non-zero on success, or zero on failure. |
129 |
*/ |
130 |
int |
131 |
os_set_nonblocking(int fd) |
132 |
{ |
133 |
int res = 0; |
134 |
|
135 |
if ((res = fcntl(fd, F_GETFL, 0)) == -1) |
136 |
return 0; |
137 |
if (fcntl(fd, F_SETFL, res | O_NONBLOCK) == -1) |
138 |
return 0; |
139 |
return 1; |
140 |
} |
141 |
|
142 |
/* |
143 |
* setup_socket() |
144 |
* |
145 |
* Set the socket non-blocking, and other wonderful bits. |
146 |
*/ |
147 |
static void |
148 |
setup_socket(int fd) |
149 |
{ |
150 |
int opt = 1; |
151 |
|
152 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)); |
153 |
|
154 |
#ifdef IPTOS_LOWDELAY |
155 |
opt = IPTOS_LOWDELAY; |
156 |
setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt)); |
157 |
#endif |
158 |
} |
159 |
|
160 |
/** Mark a socket's address as reusable. |
161 |
* @param[in] fd %Socket file descriptor to manipulate. |
162 |
* @return Non-zero on success, or zero on failure. |
163 |
*/ |
164 |
int |
165 |
os_set_reuseaddr(int fd) |
166 |
{ |
167 |
unsigned int opt = 1; |
168 |
|
169 |
return !setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
170 |
} |
171 |
|
172 |
/** Set a socket's send and receive buffer sizes. |
173 |
* @param[in] fd %Socket file descriptor to manipulate. |
174 |
* @param[in] ssize New send buffer size. |
175 |
* @param[in] rsize New receive buffer size. |
176 |
* @return Non-zero on success, or zero on failure. |
177 |
*/ |
178 |
int |
179 |
os_set_sockbufs(int fd, unsigned int ssize, unsigned int rsize) |
180 |
{ |
181 |
unsigned int sopt = ssize; |
182 |
unsigned int ropt = rsize; |
183 |
|
184 |
return !setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &ropt, sizeof(ropt)) && |
185 |
!setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &sopt, sizeof(sopt)); |
186 |
} |
187 |
|
188 |
/** Set a socket's "type of service" value. |
189 |
* @param[in] fd %Socket file descriptor to manipulate. |
190 |
* @param[in] tos New type of service value to use. |
191 |
* @return Non-zero on success, or zero on failure. |
192 |
*/ |
193 |
int |
194 |
os_set_tos(int fd, int tos) |
195 |
{ |
196 |
#if defined(IP_TOS) && defined(IPPROTO_IP) |
197 |
unsigned int opt = tos; |
198 |
|
199 |
return !setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt)); |
200 |
#else |
201 |
return 1; |
202 |
#endif |
203 |
} |
204 |
|
205 |
/** Disable IP options on a socket. |
206 |
* @param[in] fd %Socket file descriptor to manipulate. |
207 |
* @return Non-zero on success, or zero on failure. |
208 |
*/ |
209 |
int |
210 |
os_disable_options(int fd) |
211 |
{ |
212 |
#if defined(IP_OPTIONS) && defined(IPPROTO_IP) |
213 |
return !setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0); |
214 |
#else |
215 |
return 1; |
216 |
#endif |
217 |
} |
218 |
|
219 |
/** Start listening on a socket. |
220 |
* @param[in] fd Disconnected file descriptor. |
221 |
* @param[in] backlog Maximum number of un-accept()ed connections to keep. |
222 |
* @return Non-zero on success; zero on error. |
223 |
*/ |
224 |
int |
225 |
os_set_listen(int fd, int backlog) |
226 |
{ |
227 |
return !listen(fd, backlog); |
228 |
} |
229 |
|
230 |
/** Attempt to read from a non-blocking socket. |
231 |
* @param[in] fd File descriptor to read from. |
232 |
* @param[out] buf Output buffer to read into. |
233 |
* @param[in] length Number of bytes to read. |
234 |
* @param[out] count_out Receives number of bytes actually read. |
235 |
* @return An IOResult value indicating status. |
236 |
*/ |
237 |
IOResult |
238 |
os_recv_nonb(int fd, char *buf, unsigned int length, unsigned int *count_out) |
239 |
{ |
240 |
int res = 0; |
241 |
|
242 |
assert(buf); |
243 |
assert(count_out); |
244 |
|
245 |
if ((res = recv(fd, buf, length, 0)) > 0) |
246 |
{ |
247 |
*count_out = (unsigned int)res; |
248 |
return IO_SUCCESS; |
249 |
} |
250 |
|
251 |
if (res == 0) |
252 |
{ |
253 |
*count_out = 0; |
254 |
errno = 0; /* Or ECONNRESET? */ |
255 |
return IO_FAILURE; |
256 |
} |
257 |
|
258 |
*count_out = 0; |
259 |
return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; |
260 |
} |
261 |
|
262 |
/** Attempt to read from a non-blocking UDP socket. |
263 |
* @param[in] fd File descriptor to read from. |
264 |
* @param[out] buf Output buffer to read into. |
265 |
* @param[in] length Number of bytes to read. |
266 |
* @param[out] length_out Receives number of bytes actually read. |
267 |
* @param[out] addr_out Peer address that sent the message. |
268 |
* @return An IOResult value indicating status. |
269 |
*/ |
270 |
IOResult |
271 |
os_recvfrom_nonb(int fd, char *buf, unsigned int length, |
272 |
unsigned int *length_out, |
273 |
struct irc_ssaddr *addr) |
274 |
{ |
275 |
unsigned int len = sizeof(struct irc_ssaddr); |
276 |
int res = 0; |
277 |
|
278 |
assert(buf); |
279 |
assert(length_out); |
280 |
assert(addr); |
281 |
|
282 |
res = recvfrom(fd, buf, length, 0, (struct sockaddr *)addr, &len); |
283 |
|
284 |
if (res > -1) |
285 |
{ |
286 |
*length_out = (unsigned int)res; |
287 |
return IO_SUCCESS; |
288 |
} |
289 |
|
290 |
*length_out = 0; |
291 |
return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; |
292 |
} |
293 |
|
294 |
/** Attempt to write on a connected socket. |
295 |
* @param[in] fd File descriptor to write to. |
296 |
* @param[in] buf Output buffer to send from. |
297 |
* @param[in] length Number of bytes to write. |
298 |
* @param[out] count_out Receives number of bytes actually written. |
299 |
* @return An IOResult value indicating status. |
300 |
*/ |
301 |
IOResult |
302 |
os_send_nonb(int fd, const char *buf, unsigned int length, |
303 |
unsigned int *count_out) |
304 |
{ |
305 |
int res = 0; |
306 |
|
307 |
assert(buf); |
308 |
assert(count_out); |
309 |
|
310 |
if ((res = send(fd, buf, length, 0)) > -1) |
311 |
{ |
312 |
*count_out = (unsigned int)res; |
313 |
return IO_SUCCESS; |
314 |
} |
315 |
|
316 |
*count_out = 0; |
317 |
return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; |
318 |
} |
319 |
|
320 |
/** Attempt a vectored write on a connected socket. |
321 |
* @param[in] fd File descriptor to write to. |
322 |
* @param[in] buf Message queue to send from. |
323 |
* @param[out] count_in Number of bytes mapped from \a buf. |
324 |
* @param[out] count_out Receives number of bytes actually written. |
325 |
* @return An IOResult value indicating status. |
326 |
*/ |
327 |
IOResult |
328 |
os_sendv_nonb(int fd, struct MsgQ *buf, unsigned int *count_in, |
329 |
unsigned int *count_out) |
330 |
{ |
331 |
int res = 0, count = 0; |
332 |
struct iovec iov[IOV_MAX]; |
333 |
|
334 |
assert(buf); |
335 |
assert(count_in); |
336 |
assert(count_out); |
337 |
|
338 |
*count_in = 0; |
339 |
count = msgq_mapiov(buf, iov, IOV_MAX, count_in); |
340 |
|
341 |
if ((res = writev(fd, iov, count)) > -1) |
342 |
{ |
343 |
*count_out = (unsigned int)res; |
344 |
return IO_SUCCESS; |
345 |
} |
346 |
|
347 |
*count_out = 0; |
348 |
return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; |
349 |
} |
350 |
|
351 |
/** Attempt to write on a non-blocking UDP socket. |
352 |
* @param[in] fd File descriptor to write to. |
353 |
* @param[in] buf Output buffer to send from. |
354 |
* @param[in] length Number of bytes to write. |
355 |
* @param[out] count_out Receives number of bytes actually written. |
356 |
* @param[in] flags Flags for call to sendto(). |
357 |
* @param[in] peer Destination address of the message. |
358 |
* @return An IOResult value indicating status. |
359 |
*/ |
360 |
IOResult os_sendto_nonb(int fd, const char *buf, unsigned int length, |
361 |
unsigned int *count_out, unsigned int flags, |
362 |
struct irc_ssaddr *peer) |
363 |
{ |
364 |
int res = 0, size = 0; |
365 |
|
366 |
assert(buf); |
367 |
|
368 |
if ((res = sendto(fd, buf, length, flags, (struct sockaddr *)peer, peer->ss_len)) > -1) |
369 |
{ |
370 |
if (count_out) |
371 |
*count_out = (unsigned int)res; |
372 |
return IO_SUCCESS; |
373 |
} |
374 |
|
375 |
if (count_out) |
376 |
*count_out = 0; |
377 |
return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; |
378 |
} |
379 |
|
380 |
/** Start a non-blocking connection. |
381 |
* @param[in] fd Disconnected file descriptor. |
382 |
* @param[in] sin Target address for connection. |
383 |
* @return IOResult code indicating status. |
384 |
*/ |
385 |
IOResult os_connect_nonb(int fd, const struct irc_ssaddr *addr) |
386 |
{ |
387 |
int size; |
388 |
|
389 |
// size = sockaddr_from_irc(&addr, sin, fd); |
390 |
if (connect(fd, (const struct sockaddr *)addr, size)) |
391 |
return (errno == EINPROGRESS) ? IO_BLOCKED : IO_FAILURE; |
392 |
return IO_SUCCESS; |
393 |
} |
394 |
|
395 |
int |
396 |
os_accept(int fd, struct irc_ssaddr *addr) |
397 |
{ |
398 |
int new_fd = 0; |
399 |
socklen_t addrlen = sizeof(struct irc_ssaddr); |
400 |
|
401 |
new_fd = accept(fd, (struct sockaddr *)addr, &addrlen); |
402 |
if (new_fd < 0) |
403 |
return -1; |
404 |
|
405 |
remove_ipv6_mapping(addr); |
406 |
setup_socket(new_fd); |
407 |
os_set_nonblocking(new_fd); |
408 |
return new_fd; |
409 |
} |
410 |
|
411 |
int |
412 |
os_socket(int family, int sock_type, const char *port_name) |
413 |
{ |
414 |
int fd; |
415 |
|
416 |
if ((fd = socket(family, sock_type, 0)) < 0) |
417 |
{ |
418 |
report_error(L_ALL, SOCKET_ERROR_MSG, port_name, errno); |
419 |
return -1; |
420 |
} |
421 |
|
422 |
if (fd > MAXCLIENTS - 1) |
423 |
{ |
424 |
report_error(L_ALL, CONNLIMIT_ERROR_MSG, port_name, 0); |
425 |
close(fd); |
426 |
return -1; |
427 |
} |
428 |
|
429 |
if (!os_set_reuseaddr(fd)) |
430 |
{ |
431 |
report_error(L_ALL, REUSEADDR_ERROR_MSG, port_name, errno); |
432 |
close(fd); |
433 |
return -1; |
434 |
} |
435 |
|
436 |
if (!os_set_nonblocking(fd)) |
437 |
{ |
438 |
report_error(L_ALL, NONB_ERROR_MSG, port_name, errno); |
439 |
close(fd); |
440 |
return -1; |
441 |
} |
442 |
|
443 |
setup_socket(fd); |
444 |
return fd; |
445 |
} |
446 |
|
447 |
int |
448 |
os_bind(int fd, struct irc_ssaddr *local, int len) |
449 |
{ |
450 |
|
451 |
if (local) |
452 |
return bind(fd, (struct sockaddr *)local, len); |
453 |
return 0; |
454 |
} |
455 |
|
456 |
/** Closes all file descriptors. |
457 |
* @param close_stderr If non-zero, also close stderr. |
458 |
*/ |
459 |
void |
460 |
close_connections(const int close_stderr) |
461 |
{ |
462 |
int i = 0; |
463 |
|
464 |
if (close_stderr) |
465 |
{ |
466 |
close(0); |
467 |
close(1); |
468 |
close(2); |
469 |
} |
470 |
|
471 |
for (i = 3; i < 1024 /* XXX */; ++i) |
472 |
close(i); |
473 |
} |
474 |
|
475 |
/* |
476 |
* report_error - report an error from an errno. |
477 |
* Record error to log and also send a copy to all *LOCAL* opers online. |
478 |
* |
479 |
* text is a *format* string for outputing error. It must |
480 |
* contain only two '%s', the first will be replaced |
481 |
* by the sockhost from the client_p, and the latter will |
482 |
* be taken from sys_errlist[errno]. |
483 |
* |
484 |
* client_p if not NULL, is the *LOCAL* client associated with |
485 |
* the error. |
486 |
* |
487 |
* Cannot use perror() within daemon. stderr is closed in |
488 |
* ircd and cannot be used. And, worse yet, it might have |
489 |
* been reassigned to a normal connection... |
490 |
* |
491 |
* Actually stderr is still there IFF ircd was run with -s --Rodder |
492 |
*/ |
493 |
|
494 |
void |
495 |
report_error(int level, const char *text, const char *who, int error) |
496 |
{ |
497 |
int errtmp = errno; /* debug may change 'errno' */ |
498 |
const char *errmsg = (error) ? strerror(error) : ""; |
499 |
|
500 |
if (!errmsg) |
501 |
errmsg = "Unknown error"; |
502 |
|
503 |
if (EmptyString(who)) |
504 |
who = "unknown"; |
505 |
|
506 |
sendto_realops_flags(UMODE_DEBUG, level, SEND_NOTICE, |
507 |
text, who, errmsg); |
508 |
ilog(LOG_TYPE_IRCD, text, who, errmsg); |
509 |
errno = errtmp; |
510 |
} |
511 |
|
512 |
/** Complete non-blocking connect()-sequence. Check access and |
513 |
* terminate connection, if trouble detected. |
514 |
* @param client_p Client to which we have connected, with all ConfItem structs attached. |
515 |
* @return Zero on failure (caller should exit_client()), non-zero on success. |
516 |
*/ |
517 |
static int |
518 |
completed_connection(struct Client *client_p) |
519 |
{ |
520 |
struct MaskItem *conf = NULL; |
521 |
|
522 |
assert(client_p); |
523 |
|
524 |
/* |
525 |
* Get the socket status from the fd first to check if |
526 |
* connection actually succeeded |
527 |
*/ |
528 |
if ((client_p->localClient->error = os_get_sockerr(s_fd(&client_p->localClient->socket)))) |
529 |
{ |
530 |
const char *msg = strerror(client_p->localClient->error); |
531 |
|
532 |
if (!msg) |
533 |
msg = "Unknown error"; |
534 |
|
535 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, |
536 |
"Connection failed to %s: %s", |
537 |
get_client_name(client_p, HIDE_IP), msg); |
538 |
sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, |
539 |
"Connection failed to %s: %s", |
540 |
get_client_name(client_p, MASK_IP), msg); |
541 |
return 0; |
542 |
} |
543 |
|
544 |
conf = find_conf_name(&client_p->localClient->confs, |
545 |
client_p->name, CONF_SERVER); |
546 |
if (!conf) |
547 |
{ |
548 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, |
549 |
"Lost connect{} block for %s", get_client_name(client_p, HIDE_IP)); |
550 |
sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, |
551 |
"Lost connect{} block for %s", get_client_name(client_p, MASK_IP)); |
552 |
return 0; |
553 |
} |
554 |
|
555 |
if (s_state(&client_p->localClient->socket) == SS_CONNECTING) |
556 |
socket_state(&client_p->localClient->socket, SS_CONNECTED); |
557 |
|
558 |
if (!EmptyString(conf->spasswd)) |
559 |
sendto_one(client_p, "PASS %s TS %d %s", conf->spasswd, TS_CURRENT, me.id); |
560 |
|
561 |
send_capabilities(client_p, 0); |
562 |
|
563 |
assert(client_p->serv); |
564 |
SetHandshake(client_p); |
565 |
|
566 |
/* |
567 |
* Make us timeout after twice the timeout for DNS look ups |
568 |
*/ |
569 |
client_p->localClient->lasttime = CurrentTime; |
570 |
AddFlag(client_p, FLAGS_PINGSENT); |
571 |
|
572 |
sendto_one(client_p, "SERVER %s 1 :%s%s", me.name, |
573 |
ConfigServerHide.hidden ? "(H) " : "", me.info); |
574 |
|
575 |
return !IsDead(client_p); |
576 |
} |
577 |
|
578 |
/* |
579 |
* close_connection |
580 |
* Close the physical connection. This function must make |
581 |
* MyConnect(client_p) == FALSE, and set client_p->from == NULL. |
582 |
*/ |
583 |
void |
584 |
close_connection(struct Client *client_p) |
585 |
{ |
586 |
dlink_node *ptr = NULL; |
587 |
|
588 |
assert(client_p); |
589 |
|
590 |
if (IsClient(client_p)) |
591 |
{ |
592 |
++ServerStats.is_cl; |
593 |
ServerStats.is_cbs += client_p->localClient->send.bytes; |
594 |
ServerStats.is_cbr += client_p->localClient->recv.bytes; |
595 |
ServerStats.is_cti += CurrentTime - client_p->localClient->firsttime; |
596 |
} |
597 |
else if (IsServer(client_p)) |
598 |
{ |
599 |
++ServerStats.is_sv; |
600 |
ServerStats.is_sbs += client_p->localClient->send.bytes; |
601 |
ServerStats.is_sbr += client_p->localClient->recv.bytes; |
602 |
ServerStats.is_sti += CurrentTime - client_p->localClient->firsttime; |
603 |
|
604 |
DLINK_FOREACH(ptr, server_items.head) |
605 |
{ |
606 |
struct MaskItem *conf = ptr->data; |
607 |
|
608 |
if (irccmp(conf->name, client_p->name)) |
609 |
continue; |
610 |
|
611 |
/* |
612 |
* Reset next-connect cycle of all connect{} blocks that match |
613 |
* this servername. |
614 |
*/ |
615 |
conf->until = CurrentTime + conf->class->con_freq; |
616 |
} |
617 |
} |
618 |
else |
619 |
++ServerStats.is_ni; |
620 |
|
621 |
if (s_fd(&client_p->localClient->socket)> -1) |
622 |
{ |
623 |
flush_connections(client_p); |
624 |
dlinkDelete(&client_p->localClient->node, &connection_list); |
625 |
close(s_fd(&client_p->localClient->socket)); |
626 |
socket_del(&client_p->localClient->socket); /* Queue a socket delete */ |
627 |
s_fd(&client_p->localClient->socket) = -1; |
628 |
} |
629 |
|
630 |
AddFlag(client_p, FLAGS_DEADSOCKET); |
631 |
|
632 |
MsgQClear(&client_p->localClient->sendQ); |
633 |
client_drop_sendq(client_p->localClient); |
634 |
DBufClear(&client_p->localClient->recvQ); |
635 |
|
636 |
MyFree(client_p->localClient->passwd); |
637 |
client_p->localClient->passwd = NULL; |
638 |
|
639 |
detach_conf(client_p, CONF_CLIENT|CONF_OPER|CONF_SERVER); |
640 |
client_p->from = NULL; /* ...this should catch them! >:) --msa */ |
641 |
|
642 |
if (client_p->localClient->listener) |
643 |
{ |
644 |
assert(0 < client_p->localClient->listener->ref_count); |
645 |
listener_release(client_p->localClient->listener); |
646 |
client_p->localClient->listener = NULL; |
647 |
} |
648 |
} |
649 |
|
650 |
/* |
651 |
* add_connection - creates a client which has just connected to us on |
652 |
* the given fd. The sockhost field is initialized with the ip# of the host. |
653 |
* An unique id is calculated now, in case it is needed for auth. |
654 |
* The client is sent to the auth module for verification, and not put in |
655 |
* any client list yet. |
656 |
*/ |
657 |
void |
658 |
add_connection(struct Listener *listener, struct irc_ssaddr *irn, int fd) |
659 |
{ |
660 |
struct Client *new_client = make_client(NULL); |
661 |
|
662 |
/* |
663 |
* copy address to 'sockhost' as a string, copy it to host too |
664 |
* so we have something valid to put into error messages... |
665 |
*/ |
666 |
memcpy(&new_client->localClient->ip, irn, sizeof(struct irc_ssaddr)); |
667 |
|
668 |
getnameinfo((struct sockaddr *)&new_client->localClient->ip, |
669 |
new_client->localClient->ip.ss_len, new_client->sockhost, |
670 |
sizeof(new_client->sockhost), NULL, 0, NI_NUMERICHOST); |
671 |
new_client->localClient->aftype = new_client->localClient->ip.ss.ss_family; |
672 |
|
673 |
#ifdef HAVE_LIBGEOIP |
674 |
/* XXX IPV6 SUPPORT XXX */ |
675 |
if (irn->ss.ss_family == AF_INET && geoip_ctx) |
676 |
{ |
677 |
const struct sockaddr_in *v4 = (const struct sockaddr_in *)&new_client->localClient->ip; |
678 |
new_client->localClient->country_id = GeoIP_id_by_ipnum(geoip_ctx, (unsigned long)ntohl(v4->sin_addr.s_addr)); |
679 |
} |
680 |
#endif |
681 |
|
682 |
if (new_client->sockhost[0] == ':' && new_client->sockhost[1] == ':') |
683 |
{ |
684 |
strlcpy(new_client->host, "0", sizeof(new_client->host)); |
685 |
strlcpy(new_client->host+1, new_client->sockhost, sizeof(new_client->host)-1); |
686 |
memmove(new_client->sockhost+1, new_client->sockhost, sizeof(new_client->sockhost)-1); |
687 |
new_client->sockhost[0] = '0'; |
688 |
} |
689 |
else |
690 |
strlcpy(new_client->host, new_client->sockhost, sizeof(new_client->host)); |
691 |
|
692 |
|
693 |
s_fd(&new_client->localClient->socket) = fd; |
694 |
if (!socket_add(&new_client->localClient->socket, client_sock_callback, |
695 |
new_client->localClient, SS_CONNECTED, 0, fd)) |
696 |
{ |
697 |
++ServerStats.is_ref; |
698 |
// write(fd, register_message, strlen(register_message)); |
699 |
close(fd); |
700 |
s_fd(&new_client->localClient->socket) = -1; |
701 |
return; |
702 |
} |
703 |
|
704 |
new_client->localClient->freeflag |= FREEFLAG_SOCKET; |
705 |
new_client->localClient->listener = listener; |
706 |
++listener->ref_count; |
707 |
|
708 |
/* If we've made it this far we can put the client on the auth query pile */ |
709 |
start_auth(new_client); |
710 |
} |
711 |
|
712 |
/** Determines whether to tell the events engine we're interested in |
713 |
* writable events. |
714 |
* \param client_p Client for which to decide this. |
715 |
*/ |
716 |
void |
717 |
update_write(struct Client *client_p) |
718 |
{ |
719 |
/* |
720 |
* If there are messages that need to be sent along, or if the client |
721 |
* is in the middle of a /list, then we need to tell the engine that |
722 |
* we're interested in writable events--otherwise, we need to drop |
723 |
* that interest. |
724 |
*/ |
725 |
socket_events(&client_p->localClient->socket, |
726 |
((MsgQLength(&client_p->localClient->sendQ) || client_p->localClient->list_task) ? |
727 |
SOCK_ACTION_ADD : SOCK_ACTION_DEL) | SOCK_EVENT_WRITABLE); |
728 |
} |
729 |
|
730 |
/** Read a 'packet' of data from a connection and process it. Read in |
731 |
* 8k chunks to give a better performance rating (for server |
732 |
* connections). Do some tricky stuff for client connections to make |
733 |
* sure they don't do any flooding >:-) -avalon |
734 |
* @param client_p Client from which to read data. |
735 |
* @param socket_ready If non-zero, more data can be read from the client's socket. |
736 |
* @return Positive number on success, zero on connection-fatal failure, negative |
737 |
* if user is killed. |
738 |
*/ |
739 |
static int |
740 |
read_packet(struct Client *client_p, int socket_ready) |
741 |
{ |
742 |
unsigned int dolen = 0, length = 0; |
743 |
|
744 |
if (socket_ready && !(IsClient(client_p) && |
745 |
DBufLength(&client_p->localClient->recvQ) > get_recvq(&client_p->localClient->confs))) |
746 |
{ |
747 |
switch (os_recv_nonb(s_fd(&client_p->localClient->socket), readbuf, sizeof(readbuf), &length)) |
748 |
{ |
749 |
case IO_SUCCESS: |
750 |
if (length) |
751 |
{ |
752 |
client_p->localClient->lasttime = CurrentTime; |
753 |
|
754 |
if (client_p->localClient->lasttime > client_p->localClient->since) |
755 |
client_p->localClient->since = CurrentTime; |
756 |
|
757 |
ClearPingSent(client_p); |
758 |
DelFlag(client_p, FLAGS_NONEWLINE); |
759 |
} |
760 |
break; |
761 |
|
762 |
case IO_BLOCKED: |
763 |
break; |
764 |
case IO_FAILURE: |
765 |
client_p->localClient->error = errno; |
766 |
/* AddFlag(client_p, FLAGS_DEADSOCKET); */ |
767 |
return 0; |
768 |
} |
769 |
} |
770 |
|
771 |
/* |
772 |
* For server connections, we process as many as we can without |
773 |
* worrying about the time of day or anything :) |
774 |
*/ |
775 |
if (length > 0 && IsServer(client_p)) |
776 |
return server_dopacket(client_p, readbuf, length); |
777 |
else if (length > 0 && (IsHandshake(client_p) || IsConnecting(client_p))) |
778 |
return connect_dopacket(client_p, readbuf, length); |
779 |
else |
780 |
{ |
781 |
/* |
782 |
* Before we even think of parsing what we just read, stick |
783 |
* it on the end of the receive queue and do it when its |
784 |
* turn comes around. |
785 |
*/ |
786 |
if (length > 0 && !dbuf_put(&client_p->localClient->recvQ, readbuf, length)) |
787 |
return exit_client(client_p, client_p, &me, "dbuf_put fail"); |
788 |
|
789 |
if (DBufLength(&client_p->localClient->recvQ) > get_recvq(&client_p->localClient->confs)) |
790 |
return exit_client(client_p, client_p, &me, "Excess Flood"); |
791 |
|
792 |
while (DBufLength(&client_p->localClient->recvQ) && !HasFlag(client_p, FLAGS_NONEWLINE) && |
793 |
(IsTrusted(client_p) || client_p->localClient->since - CurrentTime < 10)) |
794 |
{ |
795 |
dolen = dbuf_getmsg(&client_p->localClient->recvQ, |
796 |
client_p->localClient->buffer, IRCD_BUFSIZE); |
797 |
|
798 |
/* |
799 |
* Devious looking...whats it do ? well..if a client |
800 |
* sends a *long* message without any CR or LF, then |
801 |
* dbuf_getmsg fails and we pull it out using this |
802 |
* loop which just gets the next 512 bytes and then |
803 |
* deletes the rest of the buffer contents. |
804 |
* -avalon |
805 |
*/ |
806 |
if (dolen == 0) |
807 |
{ |
808 |
if (DBufLength(&client_p->localClient->recvQ) < 510) |
809 |
AddFlag(client_p, FLAGS_NONEWLINE); |
810 |
else |
811 |
{ |
812 |
/* |
813 |
* More than 512 bytes in the line - drop the input and yell |
814 |
* at the client. |
815 |
*/ |
816 |
DBufClear(&client_p->localClient->recvQ); |
817 |
sendto_one(client_p, form_str(ERR_INPUTTOOLONG), me.name, |
818 |
client_p->name[0] ? client_p->name : "*"); |
819 |
} |
820 |
} |
821 |
else if (client_dopacket(client_p, dolen) == CPTR_KILLED) |
822 |
return CPTR_KILLED; |
823 |
|
824 |
/* |
825 |
* If it has become registered as a Server |
826 |
* then skip the per-message parsing below. |
827 |
*/ |
828 |
if (IsHandshake(client_p) || IsServer(client_p)) |
829 |
{ |
830 |
while (-1) |
831 |
{ |
832 |
dolen = dbuf_get(&client_p->localClient->recvQ, readbuf, sizeof(readbuf)); |
833 |
|
834 |
if (dolen <= 0) |
835 |
return 1; |
836 |
if (dolen == 0) |
837 |
{ |
838 |
if (DBufLength(&client_p->localClient->recvQ) < 510) |
839 |
AddFlag(client_p, FLAGS_NONEWLINE); |
840 |
else |
841 |
DBufClear(&client_p->localClient->recvQ); |
842 |
} |
843 |
else if ((IsServer(client_p) && |
844 |
server_dopacket(client_p, readbuf, dolen) == CPTR_KILLED) || |
845 |
(!IsServer(client_p) && |
846 |
connect_dopacket(client_p, readbuf, dolen) == CPTR_KILLED)) |
847 |
return CPTR_KILLED; |
848 |
} |
849 |
} |
850 |
} |
851 |
|
852 |
/* If there's still data to process, wait 2 seconds first */ |
853 |
if (DBufLength(&client_p->localClient->recvQ) && !HasFlag(client_p, FLAGS_NONEWLINE) && |
854 |
!t_onqueue(&client_p->localClient->proc)) |
855 |
{ |
856 |
client_p->localClient->freeflag |= FREEFLAG_TIMER; |
857 |
timer_add(&client_p->localClient->proc, client_timer_callback, client_p->localClient, |
858 |
TT_RELATIVE, 2); |
859 |
} |
860 |
} |
861 |
return 1; |
862 |
} |
863 |
|
864 |
/** Attempt to send a sequence of bytes to the connection. |
865 |
* As a side effect, updates \a client_p's FLAGS_BLOCKED setting |
866 |
* and sendB/sendK fields. |
867 |
* @param client_p Client that should receive data. |
868 |
* @param buf Message buffer to send to client. |
869 |
* @return Negative on connection-fatal error; otherwise |
870 |
* number of bytes sent. |
871 |
*/ |
872 |
unsigned int |
873 |
deliver_it(struct Client *client_p, struct MsgQ *buf) |
874 |
{ |
875 |
unsigned int bytes_written = 0, bytes_count = 0; |
876 |
|
877 |
assert(client_p); |
878 |
|
879 |
switch (os_sendv_nonb(s_fd(&client_p->localClient->socket), buf, &bytes_count, &bytes_written)) |
880 |
{ |
881 |
case IO_SUCCESS: |
882 |
DelFlag(client_p, FLAGS_BLOCKED); |
883 |
|
884 |
client_p->localClient->send.bytes += bytes_written; |
885 |
me.localClient->send.bytes += bytes_written; |
886 |
|
887 |
/* A partial write implies that future writes will block. */ |
888 |
if (bytes_written < bytes_count) |
889 |
AddFlag(client_p, FLAGS_BLOCKED); |
890 |
break; |
891 |
case IO_BLOCKED: |
892 |
AddFlag(client_p, FLAGS_BLOCKED); |
893 |
break; |
894 |
case IO_FAILURE: |
895 |
client_p->localClient->error = errno; |
896 |
AddFlag(client_p, FLAGS_DEADSOCKET); |
897 |
break; |
898 |
} |
899 |
|
900 |
return bytes_written; |
901 |
} |
902 |
|
903 |
/** Set up address and port and make a connection. |
904 |
* @param conf Provides the connection information. |
905 |
* @param client_p Client structure for the peer. |
906 |
* @return Non-zero on success; zero on failure. |
907 |
*/ |
908 |
static int |
909 |
connect_inet(struct MaskItem *conf, struct Client *client_p) |
910 |
{ |
911 |
struct addrinfo hints, *res; |
912 |
char portname[PORTNAMELEN + 1]; |
913 |
/* conversion structs */ |
914 |
struct sockaddr_in *v4; |
915 |
struct sockaddr_in6 *v6; |
916 |
IOResult result; |
917 |
|
918 |
assert(conf); |
919 |
assert(client_p); |
920 |
|
921 |
s_fd(&client_p->localClient->socket) = os_socket(conf->aftype, SOCK_STREAM, client_p->name); |
922 |
if (s_fd(&client_p->localClient->socket) < 0) |
923 |
return 0; |
924 |
|
925 |
switch (conf->aftype) |
926 |
{ |
927 |
case AF_INET: |
928 |
v4 = (struct sockaddr_in *)&conf->bind; |
929 |
if (v4->sin_addr.s_addr != 0) |
930 |
{ |
931 |
struct irc_ssaddr ipn; |
932 |
memset(&ipn, 0, sizeof(struct irc_ssaddr)); |
933 |
ipn.ss.ss_family = AF_INET; |
934 |
ipn.ss_port = 0; |
935 |
memcpy(&ipn, &conf->bind, sizeof(struct irc_ssaddr)); |
936 |
|
937 |
os_bind(s_fd(&client_p->localClient->socket), &ipn, ipn.ss_len); |
938 |
} |
939 |
else if (ServerInfo.specific_ipv4_vhost) |
940 |
{ |
941 |
struct irc_ssaddr ipn; |
942 |
memset(&ipn, 0, sizeof(struct irc_ssaddr)); |
943 |
ipn.ss.ss_family = AF_INET; |
944 |
ipn.ss_port = 0; |
945 |
memcpy(&ipn, &ServerInfo.ip, sizeof(struct irc_ssaddr)); |
946 |
|
947 |
os_bind(s_fd(&client_p->localClient->socket), &ipn, ipn.ss_len); |
948 |
} |
949 |
|
950 |
break; |
951 |
|
952 |
case AF_INET6: |
953 |
{ |
954 |
struct irc_ssaddr ipn; |
955 |
struct sockaddr_in6 *v6conf; |
956 |
|
957 |
memset(&ipn, 0, sizeof(struct irc_ssaddr)); |
958 |
v6conf = (struct sockaddr_in6 *)&conf->bind; |
959 |
v6 = (struct sockaddr_in6 *)&ipn; |
960 |
|
961 |
if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr, sizeof(struct in6_addr)) != 0) |
962 |
{ |
963 |
memcpy(&ipn, &conf->bind, sizeof(struct irc_ssaddr)); |
964 |
ipn.ss.ss_family = AF_INET6; |
965 |
ipn.ss_port = 0; |
966 |
os_bind(s_fd(&client_p->localClient->socket), &ipn, ipn.ss_len); |
967 |
} |
968 |
else if (ServerInfo.specific_ipv6_vhost) |
969 |
{ |
970 |
memcpy(&ipn, &ServerInfo.ip6, sizeof(struct irc_ssaddr)); |
971 |
ipn.ss.ss_family = AF_INET6; |
972 |
ipn.ss_port = 0; |
973 |
os_bind(s_fd(&client_p->localClient->socket), &ipn, ipn.ss_len); |
974 |
} |
975 |
} |
976 |
} |
977 |
|
978 |
|
979 |
/* |
980 |
* Save connection info in client |
981 |
*/ |
982 |
#ifdef XXX___ |
983 |
memcpy(&cli_ip(cptr), &conf->addr, sizeof(cli_ip(cptr))); |
984 |
ircd_ntoa_r(cli_sock_ip(cptr), &cli_ip(cptr)); |
985 |
#endif |
986 |
/* |
987 |
* We want a big buffer for server connections |
988 |
*/ |
989 |
if (!os_set_sockbufs(s_fd(&client_p->localClient->socket), /* XXX */ CLIENT_TCP_WINDOW, CLIENT_TCP_WINDOW)) |
990 |
{ |
991 |
client_p->localClient->error= errno; |
992 |
report_error(L_ALL, SETBUFS_ERROR_MSG, client_p->name, errno); |
993 |
close(s_fd(&client_p->localClient->socket)); |
994 |
s_fd(&client_p->localClient->socket) = -1; |
995 |
return 0; |
996 |
} |
997 |
|
998 |
/* |
999 |
* Set the TOS bits - this is nonfatal if it doesn't stick. |
1000 |
*/ |
1001 |
#ifdef XXX___ |
1002 |
if (!os_set_tos(cli_fd(cptr), FEAT_TOS_SERVER)) |
1003 |
report_error(L_ALL, TOS_ERROR_MSG, cli_name(cptr), errno); |
1004 |
#endif |
1005 |
|
1006 |
memset(&hints, 0, sizeof(hints)); |
1007 |
hints.ai_family = AF_UNSPEC; |
1008 |
hints.ai_socktype = SOCK_STREAM; |
1009 |
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST; |
1010 |
|
1011 |
snprintf(portname, sizeof(portname), "%d", conf->port); |
1012 |
|
1013 |
#if 0 |
1014 |
if (getaddrinfo(host, portname, &hints, &res)) |
1015 |
{ |
1016 |
#if 0 |
1017 |
/* Send the DNS request, for the next level */ |
1018 |
if (aftype == AF_INET6) |
1019 |
gethost_byname_type(comm_connect_dns_callback, fd, host, T_AAAA); |
1020 |
else |
1021 |
gethost_byname_type(comm_connect_dns_callback, fd, host, T_A); |
1022 |
} |
1023 |
#endif |
1024 |
else |
1025 |
{ |
1026 |
/* We have a valid IP, so we just call tryconnect */ |
1027 |
/* Make sure we actually set the timeout here .. */ |
1028 |
assert(res != NULL); |
1029 |
memcpy(&fd->connect.hostaddr, res->ai_addr, res->ai_addrlen); |
1030 |
fd->connect.hostaddr.ss_len = res->ai_addrlen; |
1031 |
fd->connect.hostaddr.ss.ss_family = res->ai_family; |
1032 |
freeaddrinfo(res); |
1033 |
} |
1034 |
#endif |
1035 |
if ((result = os_connect_nonb(s_fd(&client_p->localClient->socket), &conf->addr)) == IO_FAILURE) |
1036 |
{ |
1037 |
client_p->localClient->error = errno; |
1038 |
report_error(L_ALL, CONNECT_ERROR_MSG, client_p->name, errno); |
1039 |
close(s_fd(&client_p->localClient->socket)); |
1040 |
s_fd(&client_p->localClient->socket) = -1; |
1041 |
return 0; |
1042 |
} |
1043 |
|
1044 |
if (!socket_add(&client_p->localClient->socket, client_sock_callback, client_p->localClient, |
1045 |
(result == IO_SUCCESS) ? SS_CONNECTED : SS_CONNECTING, |
1046 |
SOCK_EVENT_READABLE, s_fd(&client_p->localClient->socket))) |
1047 |
{ |
1048 |
client_p->localClient->error = ENFILE; |
1049 |
report_error(L_ALL, REGISTER_ERROR_MSG, client_p->name, ENFILE); |
1050 |
close(s_fd(&client_p->localClient->socket)); |
1051 |
s_fd(&client_p->localClient->socket) = -1; |
1052 |
return 0; |
1053 |
} |
1054 |
|
1055 |
client_p->localClient->freeflag |= FREEFLAG_SOCKET; |
1056 |
return 1; |
1057 |
} |
1058 |
|
1059 |
/** Start a connection to another server. |
1060 |
* @param aconf Connect block data for target server. |
1061 |
* @param by Client who requested the connection (if any). |
1062 |
* @return Non-zero on success; zero on failure. |
1063 |
*/ |
1064 |
int |
1065 |
connect_server(struct MaskItem *conf, struct Client *by) |
1066 |
{ |
1067 |
struct Client *client_p = NULL; |
1068 |
|
1069 |
assert(conf); |
1070 |
|
1071 |
if (conf->dns_pending) |
1072 |
{ |
1073 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
1074 |
"Server %s connect DNS pending", |
1075 |
conf->name); |
1076 |
return 0; |
1077 |
} |
1078 |
|
1079 |
if ((client_p = hash_find_client(conf->name))) |
1080 |
{ |
1081 |
if (IsServer(client_p) || IsMe(client_p)) |
1082 |
{ |
1083 |
sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, |
1084 |
"Server %s already present from %s", |
1085 |
conf->name, get_client_name(client_p, SHOW_IP)); |
1086 |
sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, |
1087 |
"Server %s already present from %s", |
1088 |
conf->name, get_client_name(client_p, MASK_IP)); |
1089 |
if (by && IsClient(by) && !MyClient(by)) |
1090 |
sendto_one(by, ":%s NOTICE %s :Server %s already present from %s", |
1091 |
me.name, by->name, conf->name, |
1092 |
get_client_name(client_p, MASK_IP)); |
1093 |
return 0; |
1094 |
} |
1095 |
else if (IsHandshake(client_p) || IsConnecting(client_p)) |
1096 |
{ |
1097 |
if (by && IsClient(by)) |
1098 |
sendto_one(by, ":%s NOTICE %s :Connection to %s already in progress", |
1099 |
me.name, by->name, client_p->name, |
1100 |
get_client_name(client_p, MASK_IP)); |
1101 |
return 0; |
1102 |
} |
1103 |
} |
1104 |
#ifdef XXX___ |
1105 |
/* |
1106 |
* If we don't know the IP# for this host and it is a hostname and |
1107 |
* not a ip# string, then try and find the appropriate host record. |
1108 |
*/ |
1109 |
if (!irc_in_addr_valid(&aconf->address.addr) |
1110 |
&& !ircd_aton(&aconf->address.addr, aconf->host)) { |
1111 |
gethost_byname(connect_dns_callback, conf, conf->host); |
1112 |
aconf->dns_pending = 1; |
1113 |
return 0; |
1114 |
} |
1115 |
#endif |
1116 |
/* Create a local client */ |
1117 |
client_p = make_client(NULL); |
1118 |
|
1119 |
/* |
1120 |
* Copy these in so we have something for error detection. |
1121 |
*/ |
1122 |
strlcpy(client_p->name, conf->name, sizeof(client_p->name)); |
1123 |
strlcpy(client_p->host, conf->host, sizeof(client_p->host)); |
1124 |
|
1125 |
/* We already converted the ip once, so lets use it - stu */ /* XXX */ |
1126 |
// strlcpy(client_p->sockhost, buf, sizeof(client_p->sockhost)); |
1127 |
client_p->localClient->aftype = conf->aftype; |
1128 |
|
1129 |
/* |
1130 |
* Attach config entries to client here rather than in |
1131 |
* completed_connection. This to avoid null pointer references |
1132 |
*/ |
1133 |
if (!attach_connect_block(client_p, conf->name, conf->host)) |
1134 |
{ |
1135 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
1136 |
"Host %s is not enabled for connecting: no connect{} block", |
1137 |
conf->name); |
1138 |
if (by && IsClient(by) && !MyClient(by)) |
1139 |
sendto_one(by, ":%s NOTICE %s :Connect to host %s failed: no connect{} block", |
1140 |
me.name, by->name, client_p->name); |
1141 |
|
1142 |
detach_conf(client_p, CONF_CLIENT|CONF_OPER|CONF_SERVER); |
1143 |
free_client(client_p); |
1144 |
return 0; |
1145 |
} |
1146 |
|
1147 |
/* |
1148 |
* Attempt to connect to the server in the conf line |
1149 |
*/ |
1150 |
if (!connect_inet(conf, client_p)) |
1151 |
{ |
1152 |
if (by && IsClient(by) && !MyClient(by)) |
1153 |
sendto_one(by, ":%s NOTICE %s :Couldn't connect to %s", |
1154 |
me.name, by->name, client_p->name); |
1155 |
|
1156 |
detach_conf(client_p, CONF_CLIENT|CONF_OPER|CONF_SERVER); |
1157 |
free_client(client_p); |
1158 |
return 0; |
1159 |
} |
1160 |
|
1161 |
/* |
1162 |
* NOTE: if we're here we have a valid C:Line and the client should |
1163 |
* have started the connection and stored the remote address/port and |
1164 |
* ip address name in itself |
1165 |
* |
1166 |
* The socket has been connected or connect is in progress. |
1167 |
*/ |
1168 |
make_server(client_p); |
1169 |
|
1170 |
if (by && IsClient(by)) |
1171 |
strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by)); |
1172 |
else |
1173 |
strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by)); |
1174 |
|
1175 |
SetConnecting(client_p); |
1176 |
dlinkAdd(client_p, &client_p->node, &global_client_list); |
1177 |
|
1178 |
/* from def_fam */ |
1179 |
client_p->localClient->aftype = conf->aftype; |
1180 |
|
1181 |
dlinkAdd(client_p, &client_p->localClient->node, &connection_list); |
1182 |
|
1183 |
/* |
1184 |
* Actually we lie, the connect hasn't succeeded yet, but we have a valid |
1185 |
* client_p, so we register it now. |
1186 |
* Maybe these two calls should be merged. |
1187 |
*/ |
1188 |
add_client_to_list(client_p); |
1189 |
hash_add_client(client_p); |
1190 |
/* nextping = CurrentTime; */ |
1191 |
|
1192 |
return (s_state(&client_p->localClient->socket) == SS_CONNECTED) ? |
1193 |
completed_connection(client_p) : 1; |
1194 |
} |
1195 |
|
1196 |
/* |
1197 |
* remove_ipv6_mapping() - Removes IPv4-In-IPv6 mapping from an address |
1198 |
* OSes with IPv6 mapping listening on both |
1199 |
* AF_INET and AF_INET6 map AF_INET connections inside AF_INET6 structures |
1200 |
* |
1201 |
*/ |
1202 |
void |
1203 |
remove_ipv6_mapping(struct irc_ssaddr *addr) |
1204 |
{ |
1205 |
if (addr->ss.ss_family == AF_INET6) |
1206 |
{ |
1207 |
if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)addr)->sin6_addr)) |
1208 |
{ |
1209 |
struct sockaddr_in6 v6; |
1210 |
struct sockaddr_in *v4 = (struct sockaddr_in *)addr; |
1211 |
|
1212 |
memcpy(&v6, addr, sizeof(v6)); |
1213 |
memset(v4, 0, sizeof(struct sockaddr_in)); |
1214 |
memcpy(&v4->sin_addr, &v6.sin6_addr.s6_addr[12], sizeof(v4->sin_addr)); |
1215 |
|
1216 |
addr->ss.ss_family = AF_INET; |
1217 |
addr->ss_len = sizeof(struct sockaddr_in); |
1218 |
} |
1219 |
else |
1220 |
addr->ss_len = sizeof(struct sockaddr_in6); |
1221 |
} |
1222 |
else |
1223 |
addr->ss_len = sizeof(struct sockaddr_in); |
1224 |
} |
1225 |
|
1226 |
/** Process events on a client socket. |
1227 |
* @param ev Socket event structure that has a struct Connection as |
1228 |
* its associated data. |
1229 |
*/ |
1230 |
static void |
1231 |
client_sock_callback(struct Event *ev) |
1232 |
{ |
1233 |
struct Client *client_p = NULL; |
1234 |
struct Connection *con = NULL; |
1235 |
const char *fmt = "%s"; |
1236 |
const char *fallback = NULL; |
1237 |
|
1238 |
assert(ev_socket(ev)); |
1239 |
assert(s_data(ev_socket(ev))); |
1240 |
|
1241 |
con = s_data(ev_socket(ev)); |
1242 |
|
1243 |
assert(con->client_p || ev_type(ev) == ET_DESTROY); |
1244 |
|
1245 |
client_p = con->client_p; |
1246 |
|
1247 |
assert(!client_p || con == client_p->localClient); |
1248 |
|
1249 |
switch (ev_type(ev)) |
1250 |
{ |
1251 |
case ET_DESTROY: |
1252 |
con->freeflag &= ~FREEFLAG_SOCKET; |
1253 |
|
1254 |
if (!con->freeflag && !client_p) |
1255 |
free_connection(con); |
1256 |
break; |
1257 |
|
1258 |
case ET_CONNECT: /* Socket connection completed */ |
1259 |
if (!completed_connection(client_p) || IsDead(client_p)) |
1260 |
fallback = client_p->info; |
1261 |
break; |
1262 |
|
1263 |
case ET_ERROR: /* An error occurred */ |
1264 |
fallback = client_p->info; |
1265 |
client_p->localClient->error = ev_data(ev); |
1266 |
|
1267 |
/* |
1268 |
* If the OS told us we have a bad file descriptor, we should |
1269 |
* record that for future reference. |
1270 |
*/ |
1271 |
if (client_p->localClient->error == EBADF) |
1272 |
s_fd(&client_p->localClient->socket) = -1; |
1273 |
|
1274 |
if (s_state(&con->socket) == SS_CONNECTING) |
1275 |
{ |
1276 |
completed_connection(client_p); |
1277 |
|
1278 |
/* |
1279 |
* For some reason, the os_get_sockerr() in completed_connect() |
1280 |
* can return 0 even when ev_data(ev) indicates a real error, so |
1281 |
* re-assign the client error here. |
1282 |
*/ |
1283 |
client_p->localClient->error = ev_data(ev); |
1284 |
break; |
1285 |
} |
1286 |
|
1287 |
/*FALLTHROUGH*/ |
1288 |
case ET_EOF: /* End of file on socket */ |
1289 |
AddFlag(client_p, FLAGS_DEADSOCKET); |
1290 |
|
1291 |
if ((IsServer(client_p) || IsHandshake(client_p)) && client_p->localClient->error == 0) |
1292 |
{ |
1293 |
exit_client_msg(client_p, client_p, &me, "Server %s closed the connection (%s)", |
1294 |
client_p->name, client_p->serv->last_error_msg); |
1295 |
return; |
1296 |
} |
1297 |
else |
1298 |
{ |
1299 |
fmt = "Read error: %s"; |
1300 |
fallback = "EOF from client"; |
1301 |
} |
1302 |
|
1303 |
break; |
1304 |
|
1305 |
case ET_WRITE: /* Socket is writable */ |
1306 |
DelFlag(client_p, FLAGS_BLOCKED); |
1307 |
|
1308 |
if (client_p->localClient->list_task && MsgQLength(&client_p->localClient->sendQ) < 2048) |
1309 |
safe_list_channels(client_p, 0); |
1310 |
send_queued(client_p); |
1311 |
break; |
1312 |
|
1313 |
case ET_READ: /* Socket is readable */ |
1314 |
if (!IsDead(client_p)) |
1315 |
{ |
1316 |
if (read_packet(client_p, 1) == 0) /* Error while reading packet */ |
1317 |
fallback = "EOF from client"; |
1318 |
} |
1319 |
|
1320 |
break; |
1321 |
|
1322 |
default: |
1323 |
assert(0 && "Unrecognized socket event in client_sock_callback()"); |
1324 |
break; |
1325 |
} |
1326 |
|
1327 |
assert(!client_p || !client_p->localClient || con == client_p->localClient); |
1328 |
|
1329 |
if (fallback) |
1330 |
{ |
1331 |
const char *msg = (client_p->localClient->error) ? strerror(client_p->localClient->error) : fallback; |
1332 |
|
1333 |
if (!msg) |
1334 |
msg = "Unknown error"; |
1335 |
exit_client_msg(client_p, client_p, &me, fmt, msg); |
1336 |
} |
1337 |
} |
1338 |
|
1339 |
/** Process a timer on client socket. |
1340 |
* @param ev Timer event that has a struct Connection as its |
1341 |
* associated data. |
1342 |
*/ |
1343 |
static void |
1344 |
client_timer_callback(struct Event *ev) |
1345 |
{ |
1346 |
struct Client *client_p = NULL; |
1347 |
struct Connection *con = NULL; |
1348 |
|
1349 |
assert(ev_timer(ev)); |
1350 |
assert(t_data(ev_timer(ev))); |
1351 |
assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev)); |
1352 |
|
1353 |
con = t_data(ev_timer(ev)); |
1354 |
|
1355 |
assert(con->client_p || ev_type(ev) == ET_DESTROY); |
1356 |
|
1357 |
client_p = con->client_p; |
1358 |
|
1359 |
assert(!client_p || con == client_p->localClient); |
1360 |
|
1361 |
if (ev_type(ev) == ET_DESTROY) |
1362 |
{ |
1363 |
con->freeflag &= ~FREEFLAG_TIMER; /* Timer has expired... */ |
1364 |
|
1365 |
if (!con->freeflag && !client_p) |
1366 |
free_connection(con); /* Client is being destroyed */ |
1367 |
} |
1368 |
else |
1369 |
read_packet(client_p, 0); /* read_packet will re-add timer if needed */ |
1370 |
|
1371 |
assert(!client_p || !client_p->localClient || con == client_p->localClient); |
1372 |
} |