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212380e3 AC |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * s_auth.c: Functions for querying a users ident. | |
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 | |
23 | * | |
6fcb8629 | 24 | * $Id: s_auth.c 3354 2007-04-03 09:21:31Z nenolod $ */ |
212380e3 AC |
25 | |
26 | /* | |
27 | * Changes: | |
28 | * July 6, 1999 - Rewrote most of the code here. When a client connects | |
29 | * to the server and passes initial socket validation checks, it | |
30 | * is owned by this module (auth) which returns it to the rest of the | |
31 | * server when dns and auth queries are finished. Until the client is | |
32 | * released, the server does not know it exists and does not process | |
33 | * any messages from it. | |
34 | * --Bleep Thomas Helvey <tomh@inxpress.net> | |
35 | */ | |
36 | #include "stdinc.h" | |
37 | #include "config.h" | |
212380e3 AC |
38 | #include "s_auth.h" |
39 | #include "s_conf.h" | |
40 | #include "client.h" | |
41 | #include "common.h" | |
4562c604 | 42 | #include "match.h" |
212380e3 AC |
43 | #include "ircd.h" |
44 | #include "numeric.h" | |
45 | #include "packet.h" | |
46 | #include "res.h" | |
4016731b | 47 | #include "logger.h" |
212380e3 AC |
48 | #include "s_stats.h" |
49 | #include "send.h" | |
212380e3 AC |
50 | #include "hook.h" |
51 | #include "blacklist.h" | |
52 | ||
1a530728 JT |
53 | struct AuthRequest |
54 | { | |
55 | rb_dlink_node node; | |
56 | struct Client *client; /* pointer to client struct for request */ | |
57 | struct DNSQuery dns_query; /* DNS Query */ | |
58 | unsigned int flags; /* current state of request */ | |
59 | rb_fde_t *F; /* file descriptor for auth queries */ | |
60 | time_t timeout; /* time when query expires */ | |
61 | }; | |
62 | ||
63 | /* | |
64 | * flag values for AuthRequest | |
65 | * NAMESPACE: AM_xxx - Authentication Module | |
66 | */ | |
67 | #define AM_AUTH_CONNECTING (1 << 0) | |
68 | #define AM_AUTH_PENDING (1 << 1) | |
69 | #define AM_DNS_PENDING (1 << 2) | |
70 | ||
71 | #define SetDNSPending(x) ((x)->flags |= AM_DNS_PENDING) | |
72 | #define ClearDNSPending(x) ((x)->flags &= ~AM_DNS_PENDING) | |
73 | #define IsDNSPending(x) ((x)->flags & AM_DNS_PENDING) | |
74 | ||
75 | #define SetAuthConnect(x) ((x)->flags |= AM_AUTH_CONNECTING) | |
76 | #define ClearAuthConnect(x) ((x)->flags &= ~AM_AUTH_CONNECTING) | |
77 | #define IsAuthConnect(x) ((x)->flags & AM_AUTH_CONNECTING) | |
78 | ||
79 | #define SetAuthPending(x) ((x)->flags |= AM_AUTH_PENDING) | |
80 | #define ClearAuthPending(x) ((x)->flags &= AM_AUTH_PENDING) | |
81 | #define IsAuthPending(x) ((x)->flags & AM_AUTH_PENDING) | |
82 | ||
83 | #define ClearAuth(x) ((x)->flags &= ~(AM_AUTH_PENDING | AM_AUTH_CONNECTING)) | |
84 | #define IsDoingAuth(x) ((x)->flags & (AM_AUTH_PENDING | AM_AUTH_CONNECTING)) | |
85 | ||
212380e3 AC |
86 | /* |
87 | * a bit different approach | |
88 | * this replaces the original sendheader macros | |
89 | */ | |
90 | ||
91 | static const char *HeaderMessages[] = | |
92 | { | |
5366977b AC |
93 | ":*** Looking up your hostname...", |
94 | ":*** Found your hostname", | |
95 | ":*** Couldn't look up your hostname", | |
96 | ":*** Checking Ident", | |
97 | ":*** Got Ident response", | |
98 | ":*** No Ident response", | |
99 | ":*** Your hostname is too long, ignoring hostname", | |
100 | ":*** Your forward and reverse DNS do not match, ignoring hostname", | |
101 | ":*** Cannot verify hostname validity, ignoring hostname", | |
212380e3 AC |
102 | }; |
103 | ||
104 | typedef enum | |
105 | { | |
106 | REPORT_DO_DNS, | |
107 | REPORT_FIN_DNS, | |
108 | REPORT_FAIL_DNS, | |
109 | REPORT_DO_ID, | |
110 | REPORT_FIN_ID, | |
111 | REPORT_FAIL_ID, | |
112 | REPORT_HOST_TOOLONG, | |
113 | REPORT_HOST_MISMATCH, | |
114 | REPORT_HOST_UNKNOWN | |
115 | } | |
116 | ReportType; | |
117 | ||
5366977b | 118 | #define sendheader(c, r) sendto_one_notice(c, HeaderMessages[(r)]) |
212380e3 | 119 | |
330fc5c1 | 120 | static rb_dlink_list auth_poll_list; |
398b6a73 | 121 | static rb_bh *auth_heap; |
212380e3 AC |
122 | static EVH timeout_auth_queries_event; |
123 | ||
124 | static PF read_auth_reply; | |
125 | static CNCB auth_connect_callback; | |
126 | ||
127 | /* | |
128 | * init_auth() | |
129 | * | |
130 | * Initialise the auth code | |
131 | */ | |
132 | void | |
133 | init_auth(void) | |
134 | { | |
135 | /* This hook takes a struct Client for its argument */ | |
136 | memset(&auth_poll_list, 0, sizeof(auth_poll_list)); | |
12aea5fe | 137 | rb_event_addish("timeout_auth_queries_event", timeout_auth_queries_event, NULL, 1); |
c6f49c9a | 138 | auth_heap = rb_bh_create(sizeof(struct AuthRequest), LCLIENT_HEAP_SIZE, "auth_heap"); |
212380e3 AC |
139 | } |
140 | ||
141 | /* | |
142 | * make_auth_request - allocate a new auth request | |
143 | */ | |
144 | static struct AuthRequest * | |
145 | make_auth_request(struct Client *client) | |
146 | { | |
398b6a73 | 147 | struct AuthRequest *request = rb_bh_alloc(auth_heap); |
212380e3 | 148 | client->localClient->auth_request = request; |
c6f49c9a | 149 | request->F = NULL; |
212380e3 | 150 | request->client = client; |
e3354945 | 151 | request->timeout = rb_current_time() + ConfigFileEntry.connect_timeout; |
212380e3 AC |
152 | return request; |
153 | } | |
154 | ||
155 | /* | |
156 | * free_auth_request - cleanup auth request allocations | |
157 | */ | |
158 | static void | |
159 | free_auth_request(struct AuthRequest *request) | |
160 | { | |
398b6a73 | 161 | rb_bh_free(auth_heap, request); |
212380e3 AC |
162 | } |
163 | ||
164 | /* | |
165 | * release_auth_client - release auth client from auth system | |
166 | * this adds the client into the local client lists so it can be read by | |
167 | * the main io processing loop | |
168 | */ | |
169 | static void | |
170 | release_auth_client(struct AuthRequest *auth) | |
171 | { | |
172 | struct Client *client = auth->client; | |
173 | ||
174 | if(IsDNSPending(auth) || IsDoingAuth(auth)) | |
175 | return; | |
176 | ||
177 | client->localClient->auth_request = NULL; | |
330fc5c1 | 178 | rb_dlinkDelete(&auth->node, &auth_poll_list); |
212380e3 | 179 | free_auth_request(auth); |
212380e3 AC |
180 | |
181 | /* | |
182 | * When a client has auth'ed, we want to start reading what it sends | |
183 | * us. This is what read_packet() does. | |
184 | * -- adrian | |
185 | */ | |
186 | client->localClient->allow_read = MAX_FLOOD; | |
330fc5c1 | 187 | rb_dlinkAddTail(client, &client->node, &global_client_list); |
c6f49c9a | 188 | read_packet(client->localClient->F, client); |
212380e3 AC |
189 | } |
190 | ||
191 | /* | |
192 | * auth_dns_callback - called when resolver query finishes | |
193 | * if the query resulted in a successful search, hp will contain | |
194 | * a non-null pointer, otherwise hp will be null. | |
195 | * set the client on it's way to a connection completion, regardless | |
196 | * of success of failure | |
197 | */ | |
198 | static void | |
199 | auth_dns_callback(void *vptr, struct DNSReply *reply) | |
200 | { | |
201 | struct AuthRequest *auth = (struct AuthRequest *) vptr; | |
202 | ClearDNSPending(auth); | |
203 | ||
204 | /* XXX: this shouldn't happen, but it does. -nenolod */ | |
205 | if(auth->client->localClient == NULL) | |
206 | { | |
207 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
208 | "auth_dns_callback(): auth->client->localClient (%s) is NULL", get_client_name(auth->client, HIDE_IP)); | |
209 | ||
330fc5c1 | 210 | rb_dlinkDelete(&auth->node, &auth_poll_list); |
212380e3 AC |
211 | free_auth_request(auth); |
212 | ||
213 | /* and they will silently drop through and all will hopefully be ok... -nenolod */ | |
214 | return; | |
215 | } | |
216 | ||
217 | if(reply) | |
218 | { | |
219 | int good = 1; | |
220 | ||
221 | if(auth->client->localClient->ip.ss_family == AF_INET) | |
222 | { | |
223 | struct sockaddr_in *ip, *ip_fwd; | |
224 | ||
225 | ip = (struct sockaddr_in *) &auth->client->localClient->ip; | |
226 | ip_fwd = (struct sockaddr_in *) &reply->addr; | |
227 | ||
228 | if(ip->sin_addr.s_addr != ip_fwd->sin_addr.s_addr) | |
229 | { | |
230 | sendheader(auth->client, REPORT_HOST_MISMATCH); | |
231 | good = 0; | |
232 | } | |
233 | } | |
ccda6e3f | 234 | #ifdef RB_IPV6 |
212380e3 AC |
235 | else if(auth->client->localClient->ip.ss_family == AF_INET6) |
236 | { | |
237 | struct sockaddr_in6 *ip, *ip_fwd; | |
238 | ||
239 | ip = (struct sockaddr_in6 *) &auth->client->localClient->ip; | |
240 | ip_fwd = (struct sockaddr_in6 *) &reply->addr; | |
241 | ||
242 | if(memcmp(&ip->sin6_addr, &ip_fwd->sin6_addr, sizeof(struct in6_addr)) != 0) | |
243 | { | |
244 | sendheader(auth->client, REPORT_HOST_MISMATCH); | |
245 | good = 0; | |
246 | } | |
247 | } | |
248 | #endif | |
249 | else /* can't verify it, don't know how. reject it. */ | |
250 | { | |
251 | sendheader(auth->client, REPORT_HOST_UNKNOWN); | |
252 | good = 0; | |
253 | } | |
254 | ||
255 | if(good && strlen(reply->h_name) <= HOSTLEN) | |
256 | { | |
f427c8b0 | 257 | rb_strlcpy(auth->client->host, reply->h_name, sizeof(auth->client->host)); |
212380e3 AC |
258 | sendheader(auth->client, REPORT_FIN_DNS); |
259 | } | |
260 | else if (strlen(reply->h_name) > HOSTLEN) | |
261 | sendheader(auth->client, REPORT_HOST_TOOLONG); | |
262 | } | |
263 | else | |
264 | sendheader(auth->client, REPORT_FAIL_DNS); | |
265 | ||
266 | release_auth_client(auth); | |
267 | } | |
268 | ||
269 | /* | |
270 | * authsenderr - handle auth send errors | |
271 | */ | |
272 | static void | |
273 | auth_error(struct AuthRequest *auth) | |
274 | { | |
47adde3d | 275 | ++ServerStats.is_abad; |
212380e3 | 276 | |
c6f49c9a JT |
277 | rb_close(auth->F); |
278 | auth->F = NULL; | |
212380e3 AC |
279 | |
280 | ClearAuth(auth); | |
281 | sendheader(auth->client, REPORT_FAIL_ID); | |
282 | ||
283 | release_auth_client(auth); | |
284 | } | |
285 | ||
286 | /* | |
287 | * start_auth_query - Flag the client to show that an attempt to | |
288 | * contact the ident server on | |
289 | * the client's host. The connect and subsequently the socket are all put | |
290 | * into 'non-blocking' mode. Should the connect or any later phase of the | |
291 | * identifing process fail, it is aborted and the user is given a username | |
292 | * of "unknown". | |
293 | */ | |
294 | static int | |
295 | start_auth_query(struct AuthRequest *auth) | |
296 | { | |
c6f49c9a | 297 | struct rb_sockaddr_storage localaddr, destaddr; |
e7046ee5 | 298 | socklen_t locallen = sizeof(struct rb_sockaddr_storage); |
c6f49c9a | 299 | rb_fde_t *F; |
212380e3 AC |
300 | int family; |
301 | ||
302 | if(IsAnyDead(auth->client)) | |
303 | return 0; | |
304 | ||
305 | family = auth->client->localClient->ip.ss_family; | |
c6f49c9a | 306 | if((F = rb_socket(family, SOCK_STREAM, 0, "ident")) == NULL) |
212380e3 | 307 | { |
825ddf13 | 308 | ilog_error("creating auth stream socket"); |
47adde3d | 309 | ++ServerStats.is_abad; |
212380e3 AC |
310 | return 0; |
311 | } | |
6fcb8629 AC |
312 | |
313 | /* | |
314 | * TBD: this is a pointless arbitrary limit .. we either have a socket or not. -nenolod | |
315 | */ | |
c6f49c9a | 316 | if((maxconnections - 10) < rb_get_fd(F)) |
212380e3 AC |
317 | { |
318 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
319 | "Can't allocate fd for auth on %s", | |
320 | get_client_name(auth->client, SHOW_IP)); | |
c6f49c9a | 321 | rb_close(F); |
212380e3 AC |
322 | return 0; |
323 | } | |
324 | ||
325 | sendheader(auth->client, REPORT_DO_ID); | |
326 | ||
327 | /* | |
328 | * get the local address of the client and bind to that to | |
329 | * make the auth request. This used to be done only for | |
330 | * ifdef VIRTUAL_HOST, but needs to be done for all clients | |
331 | * since the ident request must originate from that same address-- | |
332 | * and machines with multiple IP addresses are common now | |
333 | */ | |
334 | memset(&localaddr, 0, locallen); | |
d5d5e89c JT |
335 | if(getsockname(rb_get_fd(auth->client->localClient->F), |
336 | (struct sockaddr *) &localaddr, &locallen) == -1) | |
337 | { | |
338 | /* can happen if connection was just closed */ | |
339 | rb_close(F); | |
340 | return 0; | |
341 | } | |
212380e3 | 342 | |
c6f49c9a | 343 | /* XXX mangle_mapped_sockaddr((struct sockaddr *)&localaddr); */ |
ccda6e3f | 344 | #ifdef RB_IPV6 |
212380e3 AC |
345 | if(localaddr.ss_family == AF_INET6) |
346 | { | |
347 | ((struct sockaddr_in6 *)&localaddr)->sin6_port = 0; | |
348 | } else | |
349 | #endif | |
350 | ((struct sockaddr_in *)&localaddr)->sin_port = 0; | |
c6f49c9a JT |
351 | |
352 | destaddr = auth->client->localClient->ip; | |
ccda6e3f | 353 | #ifdef RB_IPV6 |
c6f49c9a JT |
354 | if(localaddr.ss_family == AF_INET6) |
355 | { | |
e33c4818 | 356 | ((struct sockaddr_in6 *)&destaddr)->sin6_port = htons(113); |
c6f49c9a JT |
357 | } else |
358 | #endif | |
e33c4818 | 359 | ((struct sockaddr_in *)&destaddr)->sin_port = htons(113); |
212380e3 | 360 | |
c6f49c9a | 361 | auth->F = F; |
212380e3 AC |
362 | SetAuthConnect(auth); |
363 | ||
c6f49c9a JT |
364 | rb_connect_tcp(F, (struct sockaddr *)&destaddr, |
365 | (struct sockaddr *) &localaddr, GET_SS_LEN(&localaddr), | |
212380e3 | 366 | auth_connect_callback, auth, |
c6f49c9a | 367 | GlobalSetOptions.ident_timeout); |
212380e3 AC |
368 | return 1; /* We suceed here for now */ |
369 | } | |
370 | ||
371 | /* | |
372 | * GetValidIdent - parse ident query reply from identd server | |
373 | * | |
374 | * Inputs - pointer to ident buf | |
375 | * Output - NULL if no valid ident found, otherwise pointer to name | |
376 | * Side effects - | |
377 | */ | |
378 | static char * | |
379 | GetValidIdent(char *buf) | |
380 | { | |
381 | int remp = 0; | |
382 | int locp = 0; | |
383 | char *colon1Ptr; | |
384 | char *colon2Ptr; | |
385 | char *colon3Ptr; | |
386 | char *commaPtr; | |
387 | char *remotePortString; | |
388 | ||
389 | /* All this to get rid of a sscanf() fun. */ | |
390 | remotePortString = buf; | |
391 | ||
392 | colon1Ptr = strchr(remotePortString, ':'); | |
393 | if(!colon1Ptr) | |
394 | return 0; | |
395 | ||
396 | *colon1Ptr = '\0'; | |
397 | colon1Ptr++; | |
398 | colon2Ptr = strchr(colon1Ptr, ':'); | |
399 | if(!colon2Ptr) | |
400 | return 0; | |
401 | ||
402 | *colon2Ptr = '\0'; | |
403 | colon2Ptr++; | |
404 | commaPtr = strchr(remotePortString, ','); | |
405 | ||
406 | if(!commaPtr) | |
407 | return 0; | |
408 | ||
409 | *commaPtr = '\0'; | |
410 | commaPtr++; | |
411 | ||
412 | remp = atoi(remotePortString); | |
413 | if(!remp) | |
414 | return 0; | |
415 | ||
416 | locp = atoi(commaPtr); | |
417 | if(!locp) | |
418 | return 0; | |
419 | ||
420 | /* look for USERID bordered by first pair of colons */ | |
421 | if(!strstr(colon1Ptr, "USERID")) | |
422 | return 0; | |
423 | ||
424 | colon3Ptr = strchr(colon2Ptr, ':'); | |
425 | if(!colon3Ptr) | |
426 | return 0; | |
427 | ||
428 | *colon3Ptr = '\0'; | |
429 | colon3Ptr++; | |
430 | return (colon3Ptr); | |
431 | } | |
432 | ||
433 | /* | |
434 | * start_auth - starts auth (identd) and dns queries for a client | |
435 | */ | |
436 | void | |
437 | start_auth(struct Client *client) | |
438 | { | |
439 | struct AuthRequest *auth = 0; | |
440 | s_assert(0 != client); | |
441 | if(client == NULL) | |
442 | return; | |
443 | ||
212380e3 AC |
444 | auth = make_auth_request(client); |
445 | ||
446 | auth->dns_query.ptr = auth; | |
447 | auth->dns_query.callback = auth_dns_callback; | |
448 | ||
449 | sendheader(client, REPORT_DO_DNS); | |
450 | ||
451 | /* No DNS cache now, remember? -- adrian */ | |
452 | gethost_byaddr(&client->localClient->ip, &auth->dns_query); | |
453 | ||
454 | SetDNSPending(auth); | |
455 | ||
456 | if(ConfigFileEntry.disable_auth == 0) | |
457 | start_auth_query(auth); | |
458 | ||
330fc5c1 | 459 | rb_dlinkAdd(auth, &auth->node, &auth_poll_list); |
212380e3 AC |
460 | } |
461 | ||
462 | /* | |
463 | * timeout_auth_queries - timeout resolver and identd requests | |
464 | * allow clients through if requests failed | |
465 | */ | |
466 | static void | |
467 | timeout_auth_queries_event(void *notused) | |
468 | { | |
330fc5c1 | 469 | rb_dlink_node *ptr; |
637c4932 | 470 | rb_dlink_node *next_ptr; |
212380e3 AC |
471 | struct AuthRequest *auth; |
472 | ||
637c4932 | 473 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, auth_poll_list.head) |
212380e3 AC |
474 | { |
475 | auth = ptr->data; | |
476 | ||
e3354945 | 477 | if(auth->timeout < rb_current_time()) |
212380e3 | 478 | { |
c6f49c9a JT |
479 | if(auth->F != NULL) |
480 | rb_close(auth->F); | |
212380e3 AC |
481 | |
482 | if(IsDoingAuth(auth)) | |
483 | { | |
484 | ClearAuth(auth); | |
47adde3d | 485 | ++ServerStats.is_abad; |
212380e3 AC |
486 | sendheader(auth->client, REPORT_FAIL_ID); |
487 | auth->client->localClient->auth_request = NULL; | |
488 | } | |
489 | if(IsDNSPending(auth)) | |
490 | { | |
491 | ClearDNSPending(auth); | |
492 | delete_resolver_queries(&auth->dns_query); | |
493 | sendheader(auth->client, REPORT_FAIL_DNS); | |
494 | } | |
495 | ||
e3354945 | 496 | auth->client->localClient->lasttime = rb_current_time(); |
212380e3 AC |
497 | release_auth_client(auth); |
498 | } | |
499 | } | |
500 | } | |
501 | ||
502 | /* | |
b2f0da88 | 503 | * auth_connect_callback() - deal with the result of rb_connect_tcp() |
212380e3 AC |
504 | * |
505 | * If the connection failed, we simply close the auth fd and report | |
506 | * a failure. If the connection suceeded send the ident server a query | |
507 | * giving "theirport , ourport". The write is only attempted *once* so | |
508 | * it is deemed to be a fail if the entire write doesn't write all the | |
509 | * data given. This shouldnt be a problem since the socket should have | |
510 | * a write buffer far greater than this message to store it in should | |
511 | * problems arise. -avalon | |
512 | */ | |
513 | static void | |
c6f49c9a | 514 | auth_connect_callback(rb_fde_t *F, int error, void *data) |
212380e3 AC |
515 | { |
516 | struct AuthRequest *auth = data; | |
517 | struct sockaddr_in us; | |
518 | struct sockaddr_in them; | |
519 | char authbuf[32]; | |
520 | socklen_t ulen = sizeof(struct sockaddr_in); | |
521 | socklen_t tlen = sizeof(struct sockaddr_in); | |
522 | ||
523 | /* Check the error */ | |
c6f49c9a | 524 | if(error != RB_OK) |
212380e3 AC |
525 | { |
526 | /* We had an error during connection :( */ | |
527 | auth_error(auth); | |
528 | return; | |
529 | } | |
530 | ||
531 | if(getsockname | |
c6f49c9a | 532 | (rb_get_fd(auth->client->localClient->F), (struct sockaddr *) &us, |
212380e3 | 533 | (socklen_t *) & ulen) |
c6f49c9a | 534 | || getpeername(rb_get_fd(auth->client->localClient->F), |
212380e3 AC |
535 | (struct sockaddr *) &them, (socklen_t *) & tlen)) |
536 | { | |
537 | ilog(L_IOERROR, "auth get{sock,peer}name error for %s:%m", | |
538 | log_client_name(auth->client, SHOW_IP)); | |
539 | auth_error(auth); | |
540 | return; | |
541 | } | |
b2f0da88 | 542 | rb_snprintf(authbuf, sizeof(authbuf), "%u , %u\r\n", |
212380e3 AC |
543 | (unsigned int) ntohs(them.sin_port), (unsigned int) ntohs(us.sin_port)); |
544 | ||
c6f49c9a | 545 | if(write(rb_get_fd(auth->F), authbuf, strlen(authbuf)) == -1) |
212380e3 AC |
546 | { |
547 | auth_error(auth); | |
548 | return; | |
549 | } | |
550 | ClearAuthConnect(auth); | |
551 | SetAuthPending(auth); | |
c6f49c9a | 552 | read_auth_reply(auth->F, auth); |
212380e3 AC |
553 | } |
554 | ||
555 | ||
556 | /* | |
557 | * read_auth_reply - read the reply (if any) from the ident server | |
558 | * we connected to. | |
559 | * We only give it one shot, if the reply isn't good the first time | |
560 | * fail the authentication entirely. --Bleep | |
561 | */ | |
562 | #define AUTH_BUFSIZ 128 | |
563 | ||
564 | static void | |
c6f49c9a | 565 | read_auth_reply(rb_fde_t *F, void *data) |
212380e3 AC |
566 | { |
567 | struct AuthRequest *auth = data; | |
568 | char *s = NULL; | |
569 | char *t = NULL; | |
570 | int len; | |
571 | int count; | |
572 | char buf[AUTH_BUFSIZ + 1]; /* buffer to read auth reply into */ | |
573 | ||
c6f49c9a | 574 | len = read(rb_get_fd(F), buf, AUTH_BUFSIZ); |
212380e3 | 575 | |
c6f49c9a | 576 | if(len < 0 && rb_ignore_errno(errno)) |
212380e3 | 577 | { |
c6f49c9a | 578 | rb_setselect(F, RB_SELECT_READ, read_auth_reply, auth); |
212380e3 AC |
579 | return; |
580 | } | |
581 | ||
582 | if(len > 0) | |
583 | { | |
584 | buf[len] = '\0'; | |
585 | ||
586 | if((s = GetValidIdent(buf))) | |
587 | { | |
588 | t = auth->client->username; | |
589 | ||
590 | while (*s == '~' || *s == '^') | |
591 | s++; | |
592 | ||
593 | for (count = USERLEN; *s && count; s++) | |
594 | { | |
595 | if(*s == '@') | |
596 | { | |
597 | break; | |
598 | } | |
599 | if(!IsSpace(*s) && *s != ':' && *s != '[') | |
600 | { | |
601 | *t++ = *s; | |
602 | count--; | |
603 | } | |
604 | } | |
605 | *t = '\0'; | |
606 | } | |
607 | } | |
608 | ||
c6f49c9a JT |
609 | rb_close(auth->F); |
610 | auth->F = NULL; | |
212380e3 AC |
611 | ClearAuth(auth); |
612 | ||
613 | if(s == NULL) | |
614 | { | |
47adde3d | 615 | ++ServerStats.is_abad; |
212380e3 AC |
616 | strcpy(auth->client->username, "unknown"); |
617 | sendheader(auth->client, REPORT_FAIL_ID); | |
618 | } | |
619 | else | |
620 | { | |
621 | sendheader(auth->client, REPORT_FIN_ID); | |
47adde3d | 622 | ++ServerStats.is_asuc; |
212380e3 AC |
623 | SetGotId(auth->client); |
624 | } | |
625 | ||
626 | release_auth_client(auth); | |
627 | } | |
628 | ||
629 | ||
630 | ||
631 | /* | |
632 | * delete_auth_queries() | |
633 | * | |
634 | */ | |
635 | void | |
636 | delete_auth_queries(struct Client *target_p) | |
637 | { | |
638 | struct AuthRequest *auth; | |
639 | ||
640 | if(target_p == NULL || target_p->localClient == NULL || | |
641 | target_p->localClient->auth_request == NULL) | |
642 | return; | |
643 | ||
644 | auth = target_p->localClient->auth_request; | |
645 | target_p->localClient->auth_request = NULL; | |
646 | ||
647 | if(IsDNSPending(auth)) | |
648 | delete_resolver_queries(&auth->dns_query); | |
649 | ||
c6f49c9a JT |
650 | if(auth->F != NULL) |
651 | rb_close(auth->F); | |
212380e3 | 652 | |
330fc5c1 | 653 | rb_dlinkDelete(&auth->node, &auth_poll_list); |
212380e3 AC |
654 | free_auth_request(auth); |
655 | } |