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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 */ | |
d0ebe1bc JT |
61 | uint16_t lport; |
62 | uint16_t rport; | |
1a530728 JT |
63 | }; |
64 | ||
65 | /* | |
66 | * flag values for AuthRequest | |
67 | * NAMESPACE: AM_xxx - Authentication Module | |
68 | */ | |
69 | #define AM_AUTH_CONNECTING (1 << 0) | |
70 | #define AM_AUTH_PENDING (1 << 1) | |
71 | #define AM_DNS_PENDING (1 << 2) | |
72 | ||
73 | #define SetDNSPending(x) ((x)->flags |= AM_DNS_PENDING) | |
74 | #define ClearDNSPending(x) ((x)->flags &= ~AM_DNS_PENDING) | |
75 | #define IsDNSPending(x) ((x)->flags & AM_DNS_PENDING) | |
76 | ||
77 | #define SetAuthConnect(x) ((x)->flags |= AM_AUTH_CONNECTING) | |
78 | #define ClearAuthConnect(x) ((x)->flags &= ~AM_AUTH_CONNECTING) | |
79 | #define IsAuthConnect(x) ((x)->flags & AM_AUTH_CONNECTING) | |
80 | ||
81 | #define SetAuthPending(x) ((x)->flags |= AM_AUTH_PENDING) | |
82 | #define ClearAuthPending(x) ((x)->flags &= AM_AUTH_PENDING) | |
83 | #define IsAuthPending(x) ((x)->flags & AM_AUTH_PENDING) | |
84 | ||
85 | #define ClearAuth(x) ((x)->flags &= ~(AM_AUTH_PENDING | AM_AUTH_CONNECTING)) | |
86 | #define IsDoingAuth(x) ((x)->flags & (AM_AUTH_PENDING | AM_AUTH_CONNECTING)) | |
87 | ||
212380e3 AC |
88 | /* |
89 | * a bit different approach | |
90 | * this replaces the original sendheader macros | |
91 | */ | |
92 | ||
93 | static const char *HeaderMessages[] = | |
94 | { | |
5366977b AC |
95 | ":*** Looking up your hostname...", |
96 | ":*** Found your hostname", | |
97 | ":*** Couldn't look up your hostname", | |
98 | ":*** Checking Ident", | |
99 | ":*** Got Ident response", | |
100 | ":*** No Ident response", | |
101 | ":*** Your hostname is too long, ignoring hostname", | |
102 | ":*** Your forward and reverse DNS do not match, ignoring hostname", | |
103 | ":*** Cannot verify hostname validity, ignoring hostname", | |
212380e3 AC |
104 | }; |
105 | ||
106 | typedef enum | |
107 | { | |
108 | REPORT_DO_DNS, | |
109 | REPORT_FIN_DNS, | |
110 | REPORT_FAIL_DNS, | |
111 | REPORT_DO_ID, | |
112 | REPORT_FIN_ID, | |
113 | REPORT_FAIL_ID, | |
114 | REPORT_HOST_TOOLONG, | |
115 | REPORT_HOST_MISMATCH, | |
116 | REPORT_HOST_UNKNOWN | |
117 | } | |
118 | ReportType; | |
119 | ||
5366977b | 120 | #define sendheader(c, r) sendto_one_notice(c, HeaderMessages[(r)]) |
212380e3 | 121 | |
330fc5c1 | 122 | static rb_dlink_list auth_poll_list; |
398b6a73 | 123 | static rb_bh *auth_heap; |
212380e3 AC |
124 | static EVH timeout_auth_queries_event; |
125 | ||
126 | static PF read_auth_reply; | |
127 | static CNCB auth_connect_callback; | |
128 | ||
129 | /* | |
130 | * init_auth() | |
131 | * | |
132 | * Initialise the auth code | |
133 | */ | |
134 | void | |
135 | init_auth(void) | |
136 | { | |
137 | /* This hook takes a struct Client for its argument */ | |
138 | memset(&auth_poll_list, 0, sizeof(auth_poll_list)); | |
12aea5fe | 139 | rb_event_addish("timeout_auth_queries_event", timeout_auth_queries_event, NULL, 1); |
c6f49c9a | 140 | auth_heap = rb_bh_create(sizeof(struct AuthRequest), LCLIENT_HEAP_SIZE, "auth_heap"); |
212380e3 AC |
141 | } |
142 | ||
143 | /* | |
144 | * make_auth_request - allocate a new auth request | |
145 | */ | |
146 | static struct AuthRequest * | |
147 | make_auth_request(struct Client *client) | |
148 | { | |
398b6a73 | 149 | struct AuthRequest *request = rb_bh_alloc(auth_heap); |
212380e3 | 150 | client->localClient->auth_request = request; |
c6f49c9a | 151 | request->F = NULL; |
212380e3 | 152 | request->client = client; |
e3354945 | 153 | request->timeout = rb_current_time() + ConfigFileEntry.connect_timeout; |
212380e3 AC |
154 | return request; |
155 | } | |
156 | ||
157 | /* | |
158 | * free_auth_request - cleanup auth request allocations | |
159 | */ | |
160 | static void | |
161 | free_auth_request(struct AuthRequest *request) | |
162 | { | |
398b6a73 | 163 | rb_bh_free(auth_heap, request); |
212380e3 AC |
164 | } |
165 | ||
166 | /* | |
167 | * release_auth_client - release auth client from auth system | |
168 | * this adds the client into the local client lists so it can be read by | |
169 | * the main io processing loop | |
170 | */ | |
171 | static void | |
172 | release_auth_client(struct AuthRequest *auth) | |
173 | { | |
174 | struct Client *client = auth->client; | |
175 | ||
176 | if(IsDNSPending(auth) || IsDoingAuth(auth)) | |
177 | return; | |
178 | ||
179 | client->localClient->auth_request = NULL; | |
330fc5c1 | 180 | rb_dlinkDelete(&auth->node, &auth_poll_list); |
212380e3 | 181 | free_auth_request(auth); |
212380e3 AC |
182 | |
183 | /* | |
184 | * When a client has auth'ed, we want to start reading what it sends | |
185 | * us. This is what read_packet() does. | |
186 | * -- adrian | |
187 | */ | |
330fc5c1 | 188 | rb_dlinkAddTail(client, &client->node, &global_client_list); |
c6f49c9a | 189 | read_packet(client->localClient->F, client); |
212380e3 AC |
190 | } |
191 | ||
192 | /* | |
193 | * auth_dns_callback - called when resolver query finishes | |
194 | * if the query resulted in a successful search, hp will contain | |
195 | * a non-null pointer, otherwise hp will be null. | |
196 | * set the client on it's way to a connection completion, regardless | |
197 | * of success of failure | |
198 | */ | |
199 | static void | |
200 | auth_dns_callback(void *vptr, struct DNSReply *reply) | |
201 | { | |
202 | struct AuthRequest *auth = (struct AuthRequest *) vptr; | |
203 | ClearDNSPending(auth); | |
204 | ||
205 | /* XXX: this shouldn't happen, but it does. -nenolod */ | |
206 | if(auth->client->localClient == NULL) | |
207 | { | |
208 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
209 | "auth_dns_callback(): auth->client->localClient (%s) is NULL", get_client_name(auth->client, HIDE_IP)); | |
210 | ||
330fc5c1 | 211 | rb_dlinkDelete(&auth->node, &auth_poll_list); |
212380e3 AC |
212 | free_auth_request(auth); |
213 | ||
214 | /* and they will silently drop through and all will hopefully be ok... -nenolod */ | |
215 | return; | |
216 | } | |
217 | ||
218 | if(reply) | |
219 | { | |
220 | int good = 1; | |
221 | ||
222 | if(auth->client->localClient->ip.ss_family == AF_INET) | |
223 | { | |
224 | struct sockaddr_in *ip, *ip_fwd; | |
225 | ||
226 | ip = (struct sockaddr_in *) &auth->client->localClient->ip; | |
227 | ip_fwd = (struct sockaddr_in *) &reply->addr; | |
228 | ||
229 | if(ip->sin_addr.s_addr != ip_fwd->sin_addr.s_addr) | |
230 | { | |
231 | sendheader(auth->client, REPORT_HOST_MISMATCH); | |
232 | good = 0; | |
233 | } | |
234 | } | |
ccda6e3f | 235 | #ifdef RB_IPV6 |
212380e3 AC |
236 | else if(auth->client->localClient->ip.ss_family == AF_INET6) |
237 | { | |
238 | struct sockaddr_in6 *ip, *ip_fwd; | |
239 | ||
240 | ip = (struct sockaddr_in6 *) &auth->client->localClient->ip; | |
241 | ip_fwd = (struct sockaddr_in6 *) &reply->addr; | |
242 | ||
243 | if(memcmp(&ip->sin6_addr, &ip_fwd->sin6_addr, sizeof(struct in6_addr)) != 0) | |
244 | { | |
245 | sendheader(auth->client, REPORT_HOST_MISMATCH); | |
246 | good = 0; | |
247 | } | |
248 | } | |
249 | #endif | |
250 | else /* can't verify it, don't know how. reject it. */ | |
251 | { | |
252 | sendheader(auth->client, REPORT_HOST_UNKNOWN); | |
253 | good = 0; | |
254 | } | |
255 | ||
256 | if(good && strlen(reply->h_name) <= HOSTLEN) | |
257 | { | |
f427c8b0 | 258 | rb_strlcpy(auth->client->host, reply->h_name, sizeof(auth->client->host)); |
212380e3 AC |
259 | sendheader(auth->client, REPORT_FIN_DNS); |
260 | } | |
261 | else if (strlen(reply->h_name) > HOSTLEN) | |
262 | sendheader(auth->client, REPORT_HOST_TOOLONG); | |
263 | } | |
264 | else | |
265 | sendheader(auth->client, REPORT_FAIL_DNS); | |
266 | ||
267 | release_auth_client(auth); | |
268 | } | |
269 | ||
270 | /* | |
271 | * authsenderr - handle auth send errors | |
272 | */ | |
273 | static void | |
274 | auth_error(struct AuthRequest *auth) | |
275 | { | |
47adde3d | 276 | ++ServerStats.is_abad; |
212380e3 | 277 | |
c6f49c9a JT |
278 | rb_close(auth->F); |
279 | auth->F = NULL; | |
212380e3 AC |
280 | |
281 | ClearAuth(auth); | |
282 | sendheader(auth->client, REPORT_FAIL_ID); | |
283 | ||
284 | release_auth_client(auth); | |
285 | } | |
286 | ||
287 | /* | |
288 | * start_auth_query - Flag the client to show that an attempt to | |
289 | * contact the ident server on | |
290 | * the client's host. The connect and subsequently the socket are all put | |
291 | * into 'non-blocking' mode. Should the connect or any later phase of the | |
292 | * identifing process fail, it is aborted and the user is given a username | |
293 | * of "unknown". | |
294 | */ | |
295 | static int | |
296 | start_auth_query(struct AuthRequest *auth) | |
297 | { | |
c6f49c9a | 298 | struct rb_sockaddr_storage localaddr, destaddr; |
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 | */ | |
3540120a | 334 | localaddr = auth->client->preClient->lip; |
212380e3 | 335 | |
c6f49c9a | 336 | /* XXX mangle_mapped_sockaddr((struct sockaddr *)&localaddr); */ |
ccda6e3f | 337 | #ifdef RB_IPV6 |
212380e3 AC |
338 | if(localaddr.ss_family == AF_INET6) |
339 | { | |
d0ebe1bc | 340 | auth->lport = ntohs(((struct sockaddr_in6 *)&localaddr)->sin6_port); |
212380e3 | 341 | ((struct sockaddr_in6 *)&localaddr)->sin6_port = 0; |
d0ebe1bc JT |
342 | } |
343 | else | |
212380e3 | 344 | #endif |
d0ebe1bc JT |
345 | { |
346 | auth->lport = ntohs(((struct sockaddr_in *)&localaddr)->sin_port); | |
347 | ((struct sockaddr_in *)&localaddr)->sin_port = 0; | |
348 | } | |
c6f49c9a JT |
349 | |
350 | destaddr = auth->client->localClient->ip; | |
ccda6e3f | 351 | #ifdef RB_IPV6 |
c6f49c9a JT |
352 | if(localaddr.ss_family == AF_INET6) |
353 | { | |
d0ebe1bc | 354 | auth->rport = ntohs(((struct sockaddr_in6 *)&destaddr)->sin6_port); |
e33c4818 | 355 | ((struct sockaddr_in6 *)&destaddr)->sin6_port = htons(113); |
d0ebe1bc JT |
356 | } |
357 | else | |
c6f49c9a | 358 | #endif |
d0ebe1bc JT |
359 | { |
360 | auth->rport = ntohs(((struct sockaddr_in *)&destaddr)->sin_port); | |
361 | ((struct sockaddr_in *)&destaddr)->sin_port = htons(113); | |
362 | } | |
212380e3 | 363 | |
c6f49c9a | 364 | auth->F = F; |
212380e3 AC |
365 | SetAuthConnect(auth); |
366 | ||
c6f49c9a JT |
367 | rb_connect_tcp(F, (struct sockaddr *)&destaddr, |
368 | (struct sockaddr *) &localaddr, GET_SS_LEN(&localaddr), | |
212380e3 | 369 | auth_connect_callback, auth, |
c6f49c9a | 370 | GlobalSetOptions.ident_timeout); |
212380e3 AC |
371 | return 1; /* We suceed here for now */ |
372 | } | |
373 | ||
374 | /* | |
375 | * GetValidIdent - parse ident query reply from identd server | |
376 | * | |
377 | * Inputs - pointer to ident buf | |
378 | * Output - NULL if no valid ident found, otherwise pointer to name | |
379 | * Side effects - | |
380 | */ | |
381 | static char * | |
382 | GetValidIdent(char *buf) | |
383 | { | |
384 | int remp = 0; | |
385 | int locp = 0; | |
386 | char *colon1Ptr; | |
387 | char *colon2Ptr; | |
388 | char *colon3Ptr; | |
389 | char *commaPtr; | |
390 | char *remotePortString; | |
391 | ||
392 | /* All this to get rid of a sscanf() fun. */ | |
393 | remotePortString = buf; | |
394 | ||
395 | colon1Ptr = strchr(remotePortString, ':'); | |
396 | if(!colon1Ptr) | |
397 | return 0; | |
398 | ||
399 | *colon1Ptr = '\0'; | |
400 | colon1Ptr++; | |
401 | colon2Ptr = strchr(colon1Ptr, ':'); | |
402 | if(!colon2Ptr) | |
403 | return 0; | |
404 | ||
405 | *colon2Ptr = '\0'; | |
406 | colon2Ptr++; | |
407 | commaPtr = strchr(remotePortString, ','); | |
408 | ||
409 | if(!commaPtr) | |
410 | return 0; | |
411 | ||
412 | *commaPtr = '\0'; | |
413 | commaPtr++; | |
414 | ||
415 | remp = atoi(remotePortString); | |
416 | if(!remp) | |
417 | return 0; | |
418 | ||
419 | locp = atoi(commaPtr); | |
420 | if(!locp) | |
421 | return 0; | |
422 | ||
423 | /* look for USERID bordered by first pair of colons */ | |
424 | if(!strstr(colon1Ptr, "USERID")) | |
425 | return 0; | |
426 | ||
427 | colon3Ptr = strchr(colon2Ptr, ':'); | |
428 | if(!colon3Ptr) | |
429 | return 0; | |
430 | ||
431 | *colon3Ptr = '\0'; | |
432 | colon3Ptr++; | |
433 | return (colon3Ptr); | |
434 | } | |
435 | ||
436 | /* | |
437 | * start_auth - starts auth (identd) and dns queries for a client | |
438 | */ | |
439 | void | |
440 | start_auth(struct Client *client) | |
441 | { | |
442 | struct AuthRequest *auth = 0; | |
443 | s_assert(0 != client); | |
444 | if(client == NULL) | |
445 | return; | |
446 | ||
212380e3 AC |
447 | auth = make_auth_request(client); |
448 | ||
449 | auth->dns_query.ptr = auth; | |
450 | auth->dns_query.callback = auth_dns_callback; | |
451 | ||
452 | sendheader(client, REPORT_DO_DNS); | |
453 | ||
454 | /* No DNS cache now, remember? -- adrian */ | |
455 | gethost_byaddr(&client->localClient->ip, &auth->dns_query); | |
456 | ||
457 | SetDNSPending(auth); | |
458 | ||
459 | if(ConfigFileEntry.disable_auth == 0) | |
460 | start_auth_query(auth); | |
461 | ||
330fc5c1 | 462 | rb_dlinkAdd(auth, &auth->node, &auth_poll_list); |
212380e3 AC |
463 | } |
464 | ||
465 | /* | |
466 | * timeout_auth_queries - timeout resolver and identd requests | |
467 | * allow clients through if requests failed | |
468 | */ | |
469 | static void | |
470 | timeout_auth_queries_event(void *notused) | |
471 | { | |
330fc5c1 | 472 | rb_dlink_node *ptr; |
637c4932 | 473 | rb_dlink_node *next_ptr; |
212380e3 AC |
474 | struct AuthRequest *auth; |
475 | ||
637c4932 | 476 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, auth_poll_list.head) |
212380e3 AC |
477 | { |
478 | auth = ptr->data; | |
479 | ||
e3354945 | 480 | if(auth->timeout < rb_current_time()) |
212380e3 | 481 | { |
c6f49c9a JT |
482 | if(auth->F != NULL) |
483 | rb_close(auth->F); | |
212380e3 AC |
484 | |
485 | if(IsDoingAuth(auth)) | |
486 | { | |
487 | ClearAuth(auth); | |
47adde3d | 488 | ++ServerStats.is_abad; |
212380e3 AC |
489 | sendheader(auth->client, REPORT_FAIL_ID); |
490 | auth->client->localClient->auth_request = NULL; | |
491 | } | |
492 | if(IsDNSPending(auth)) | |
493 | { | |
494 | ClearDNSPending(auth); | |
495 | delete_resolver_queries(&auth->dns_query); | |
496 | sendheader(auth->client, REPORT_FAIL_DNS); | |
497 | } | |
498 | ||
e3354945 | 499 | auth->client->localClient->lasttime = rb_current_time(); |
212380e3 AC |
500 | release_auth_client(auth); |
501 | } | |
502 | } | |
503 | } | |
504 | ||
505 | /* | |
b2f0da88 | 506 | * auth_connect_callback() - deal with the result of rb_connect_tcp() |
212380e3 AC |
507 | * |
508 | * If the connection failed, we simply close the auth fd and report | |
509 | * a failure. If the connection suceeded send the ident server a query | |
510 | * giving "theirport , ourport". The write is only attempted *once* so | |
511 | * it is deemed to be a fail if the entire write doesn't write all the | |
512 | * data given. This shouldnt be a problem since the socket should have | |
513 | * a write buffer far greater than this message to store it in should | |
514 | * problems arise. -avalon | |
515 | */ | |
516 | static void | |
c6f49c9a | 517 | auth_connect_callback(rb_fde_t *F, int error, void *data) |
212380e3 AC |
518 | { |
519 | struct AuthRequest *auth = data; | |
212380e3 | 520 | char authbuf[32]; |
212380e3 AC |
521 | |
522 | /* Check the error */ | |
c6f49c9a | 523 | if(error != RB_OK) |
212380e3 AC |
524 | { |
525 | /* We had an error during connection :( */ | |
526 | auth_error(auth); | |
527 | return; | |
528 | } | |
529 | ||
b2f0da88 | 530 | rb_snprintf(authbuf, sizeof(authbuf), "%u , %u\r\n", |
d0ebe1bc | 531 | auth->rport, auth->lport); |
212380e3 | 532 | |
dd1b211f | 533 | if(rb_write(auth->F, authbuf, strlen(authbuf)) != strlen(authbuf)) |
212380e3 AC |
534 | { |
535 | auth_error(auth); | |
536 | return; | |
537 | } | |
538 | ClearAuthConnect(auth); | |
539 | SetAuthPending(auth); | |
c6f49c9a | 540 | read_auth_reply(auth->F, auth); |
212380e3 AC |
541 | } |
542 | ||
543 | ||
544 | /* | |
545 | * read_auth_reply - read the reply (if any) from the ident server | |
546 | * we connected to. | |
547 | * We only give it one shot, if the reply isn't good the first time | |
548 | * fail the authentication entirely. --Bleep | |
549 | */ | |
550 | #define AUTH_BUFSIZ 128 | |
551 | ||
552 | static void | |
c6f49c9a | 553 | read_auth_reply(rb_fde_t *F, void *data) |
212380e3 AC |
554 | { |
555 | struct AuthRequest *auth = data; | |
556 | char *s = NULL; | |
557 | char *t = NULL; | |
558 | int len; | |
559 | int count; | |
560 | char buf[AUTH_BUFSIZ + 1]; /* buffer to read auth reply into */ | |
561 | ||
dd1b211f | 562 | len = rb_read(F, buf, AUTH_BUFSIZ); |
212380e3 | 563 | |
c6f49c9a | 564 | if(len < 0 && rb_ignore_errno(errno)) |
212380e3 | 565 | { |
c6f49c9a | 566 | rb_setselect(F, RB_SELECT_READ, read_auth_reply, auth); |
212380e3 AC |
567 | return; |
568 | } | |
569 | ||
570 | if(len > 0) | |
571 | { | |
572 | buf[len] = '\0'; | |
573 | ||
574 | if((s = GetValidIdent(buf))) | |
575 | { | |
576 | t = auth->client->username; | |
577 | ||
578 | while (*s == '~' || *s == '^') | |
579 | s++; | |
580 | ||
581 | for (count = USERLEN; *s && count; s++) | |
582 | { | |
583 | if(*s == '@') | |
584 | { | |
585 | break; | |
586 | } | |
587 | if(!IsSpace(*s) && *s != ':' && *s != '[') | |
588 | { | |
589 | *t++ = *s; | |
590 | count--; | |
591 | } | |
592 | } | |
593 | *t = '\0'; | |
594 | } | |
595 | } | |
596 | ||
c6f49c9a JT |
597 | rb_close(auth->F); |
598 | auth->F = NULL; | |
212380e3 AC |
599 | ClearAuth(auth); |
600 | ||
601 | if(s == NULL) | |
602 | { | |
47adde3d | 603 | ++ServerStats.is_abad; |
212380e3 AC |
604 | strcpy(auth->client->username, "unknown"); |
605 | sendheader(auth->client, REPORT_FAIL_ID); | |
606 | } | |
607 | else | |
608 | { | |
609 | sendheader(auth->client, REPORT_FIN_ID); | |
47adde3d | 610 | ++ServerStats.is_asuc; |
212380e3 AC |
611 | SetGotId(auth->client); |
612 | } | |
613 | ||
614 | release_auth_client(auth); | |
615 | } | |
616 | ||
617 | ||
618 | ||
619 | /* | |
620 | * delete_auth_queries() | |
621 | * | |
622 | */ | |
623 | void | |
624 | delete_auth_queries(struct Client *target_p) | |
625 | { | |
626 | struct AuthRequest *auth; | |
627 | ||
628 | if(target_p == NULL || target_p->localClient == NULL || | |
629 | target_p->localClient->auth_request == NULL) | |
630 | return; | |
631 | ||
632 | auth = target_p->localClient->auth_request; | |
633 | target_p->localClient->auth_request = NULL; | |
634 | ||
635 | if(IsDNSPending(auth)) | |
636 | delete_resolver_queries(&auth->dns_query); | |
637 | ||
c6f49c9a JT |
638 | if(auth->F != NULL) |
639 | rb_close(auth->F); | |
212380e3 | 640 | |
330fc5c1 | 641 | rb_dlinkDelete(&auth->node, &auth_poll_list); |
212380e3 AC |
642 | free_auth_request(auth); |
643 | } |