1 |
/* |
2 |
* Copyright (C) 2002-2003 Erik Fears |
3 |
* |
4 |
* This program is free software; you can redistribute it and/or |
5 |
* modify it under the terms of the GNU General Public License |
6 |
* as published by the Free Software Foundation; either version 2 |
7 |
* of the License, or (at your option) any later version. |
8 |
* |
9 |
* This program is distributed in the hope that it will be useful, |
10 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 |
* GNU General Public License for more details. |
13 |
* |
14 |
* You should have received a copy of the GNU General Public License |
15 |
* along with this program; if not, write to |
16 |
* |
17 |
* The Free Software Foundation, Inc. |
18 |
* 59 Temple Place - Suite 330 |
19 |
* Boston, MA 02111-1307, USA. |
20 |
* |
21 |
* |
22 |
*/ |
23 |
|
24 |
#include "setup.h" |
25 |
|
26 |
#include "config.h" |
27 |
#include "libopm.h" |
28 |
#include "malloc.h" |
29 |
#include "opm_error.h" |
30 |
#include "opm_types.h" |
31 |
#include "opm_common.h" |
32 |
#include "list.h" |
33 |
#include "inet.h" |
34 |
#include "proxy.h" |
35 |
|
36 |
#include <errno.h> |
37 |
#include <sys/time.h> |
38 |
#include <time.h> |
39 |
#include <unistd.h> |
40 |
#include <string.h> |
41 |
#include <poll.h> |
42 |
|
43 |
|
44 |
static OPM_PROTOCOL_CONFIG_T *libopm_protocol_config_create(void); |
45 |
static void libopm_protocol_config_free(OPM_PROTOCOL_CONFIG_T *); |
46 |
|
47 |
/* |
48 |
* XXX - does not appear to be used anywhere? |
49 |
* -grifferz |
50 |
*/ |
51 |
#if 0 |
52 |
static OPM_PROTOCOL_T *libopm_protocol_create(void); |
53 |
static void libopm_protocol_free(OPM_PROTOCOL_T *); |
54 |
#endif |
55 |
|
56 |
static OPM_SCAN_T *libopm_scan_create(OPM_T *, OPM_REMOTE_T *); |
57 |
static void libopm_scan_free(OPM_SCAN_T *); |
58 |
|
59 |
static OPM_CONNECTION_T *libopm_connection_create(void); |
60 |
static void libopm_connection_free(OPM_CONNECTION_T *); |
61 |
|
62 |
static void libopm_check_establish(OPM_T *); |
63 |
static void libopm_check_poll(OPM_T *); |
64 |
static void libopm_check_closed(OPM_T *); |
65 |
static void libopm_check_queue(OPM_T *); |
66 |
|
67 |
static void libopm_do_connect(OPM_T *, OPM_SCAN_T *, OPM_CONNECTION_T *); |
68 |
static void libopm_do_readready(OPM_T *, OPM_SCAN_T *, OPM_CONNECTION_T *); |
69 |
static void libopm_do_writeready(OPM_T *, OPM_SCAN_T *, OPM_CONNECTION_T *); |
70 |
static void libopm_do_hup(OPM_T *, OPM_SCAN_T *, OPM_CONNECTION_T *); |
71 |
static void libopm_do_read(OPM_T *, OPM_SCAN_T *, OPM_CONNECTION_T *); |
72 |
static void libopm_do_openproxy(OPM_T *, OPM_SCAN_T *, OPM_CONNECTION_T *); |
73 |
|
74 |
static void libopm_do_callback(OPM_T *, OPM_REMOTE_T *, int, int); |
75 |
|
76 |
static OPM_REMOTE_T *libopm_setup_remote(OPM_REMOTE_T *, OPM_CONNECTION_T *); |
77 |
|
78 |
|
79 |
/* OPM_PROTOCOLS hash |
80 |
* |
81 |
* OPM_PPROTOCOLS hashes the protocol types (int) to functions |
82 |
* which handle the protocol (sending/receiving protocol specific |
83 |
* data). |
84 |
* |
85 |
*/ |
86 |
|
87 |
static OPM_PROTOCOL_T OPM_PROTOCOLS[] = { |
88 |
{OPM_TYPE_HTTP, libopm_proxy_http_write, NULL}, |
89 |
{OPM_TYPE_SOCKS4, libopm_proxy_socks4_write, NULL}, |
90 |
{OPM_TYPE_SOCKS5, libopm_proxy_socks5_write, NULL}, |
91 |
{OPM_TYPE_ROUTER, libopm_proxy_router_write, NULL}, |
92 |
{OPM_TYPE_WINGATE, libopm_proxy_wingate_write, NULL}, |
93 |
{OPM_TYPE_HTTPPOST, libopm_proxy_httppost_write, NULL} |
94 |
}; |
95 |
|
96 |
|
97 |
|
98 |
|
99 |
/* opm_create |
100 |
* |
101 |
* Initialize a new scanner and return a pointer to it. |
102 |
* |
103 |
* Parameters: |
104 |
* None |
105 |
* |
106 |
* Return |
107 |
* Pointer to new OPM_T (scanner) |
108 |
*/ |
109 |
|
110 |
OPM_T *opm_create() |
111 |
{ |
112 |
int i; |
113 |
OPM_T *ret; |
114 |
|
115 |
ret = xcalloc(sizeof *ret); |
116 |
|
117 |
ret->config = libopm_config_create(); |
118 |
ret->scans = libopm_list_create(); |
119 |
ret->queue = libopm_list_create(); |
120 |
ret->protocols = libopm_list_create(); |
121 |
ret->fd_use = 0; |
122 |
|
123 |
/* Setup callbacks */ |
124 |
ret->callbacks = xcalloc(sizeof(OPM_CALLBACK_T) * CBLEN); |
125 |
for(i = 0; i < CBLEN; i++) |
126 |
{ |
127 |
ret->callbacks[i].func = NULL; |
128 |
ret->callbacks[i].data = NULL; |
129 |
} |
130 |
|
131 |
return ret; |
132 |
} |
133 |
|
134 |
|
135 |
|
136 |
|
137 |
/* opm_remote_create |
138 |
* |
139 |
* Create OPM_REMOTE_T struct, fill it with neccessary |
140 |
* default values and return it to the client. |
141 |
* |
142 |
* Parameters: |
143 |
* ip: IP of remote host |
144 |
* |
145 |
* Return: |
146 |
* Address of OPM_REMOTE_T created |
147 |
* |
148 |
*/ |
149 |
|
150 |
OPM_REMOTE_T *opm_remote_create(const char *ip) |
151 |
{ |
152 |
OPM_REMOTE_T *ret; |
153 |
|
154 |
|
155 |
ret = xcalloc(sizeof *ret); |
156 |
|
157 |
/* Do initializations */ |
158 |
if(ip == NULL) |
159 |
return NULL; |
160 |
|
161 |
ret->ip = libopm_xstrdup(ip); |
162 |
|
163 |
ret->port = 0; |
164 |
ret->protocol = 0; |
165 |
ret->bytes_read = 0; |
166 |
|
167 |
ret->data = NULL; |
168 |
|
169 |
ret->protocols = libopm_list_create(); /* setup protocol list */ |
170 |
|
171 |
return ret; |
172 |
} |
173 |
|
174 |
|
175 |
|
176 |
/* opm_remote_free |
177 |
* |
178 |
* Free OPM_REMOTE_T struct and cleanup |
179 |
* |
180 |
* Parameters: |
181 |
* remote: Struct to free |
182 |
* |
183 |
* Return: |
184 |
* None |
185 |
*/ |
186 |
|
187 |
void opm_remote_free(OPM_REMOTE_T *remote) |
188 |
{ |
189 |
|
190 |
OPM_NODE_T *p, *next; |
191 |
OPM_PROTOCOL_CONFIG_T *ppc; |
192 |
|
193 |
MyFree(remote->ip); |
194 |
|
195 |
LIST_FOREACH_SAFE(p, next, remote->protocols->head) |
196 |
{ |
197 |
ppc = p->data; |
198 |
|
199 |
libopm_protocol_config_free(ppc); |
200 |
libopm_list_remove(remote->protocols, p); |
201 |
libopm_node_free(p); |
202 |
} |
203 |
|
204 |
libopm_list_free(remote->protocols); |
205 |
|
206 |
MyFree(remote); |
207 |
} |
208 |
|
209 |
|
210 |
|
211 |
|
212 |
/* opm_callback |
213 |
* Register scanner level callback |
214 |
* |
215 |
* Parameters |
216 |
* scanner: scanner struct |
217 |
* type: callback type |
218 |
* Return: |
219 |
* Error code |
220 |
*/ |
221 |
|
222 |
OPM_ERR_T opm_callback(OPM_T *scanner, int type, OPM_CALLBACK_FUNC *function, void *data) |
223 |
{ |
224 |
if(type < 0 || type >= (CBLEN + 1)) |
225 |
return OPM_ERR_CBNOTFOUND; |
226 |
|
227 |
scanner->callbacks[type].func = function; |
228 |
scanner->callbacks[type].data = data; |
229 |
|
230 |
return OPM_SUCCESS; |
231 |
} |
232 |
|
233 |
|
234 |
|
235 |
|
236 |
/* opm_free |
237 |
* |
238 |
* Free OPM_T (scanner) and cleanup |
239 |
* |
240 |
* Parameters: |
241 |
* scanner: Address of OPM_T to cleanup |
242 |
* |
243 |
* Return: |
244 |
* None |
245 |
*/ |
246 |
|
247 |
void opm_free(OPM_T *scanner) |
248 |
{ |
249 |
OPM_NODE_T *p, *next; |
250 |
OPM_PROTOCOL_CONFIG_T *ppc; |
251 |
OPM_SCAN_T *scan; |
252 |
|
253 |
libopm_config_free(scanner->config); |
254 |
|
255 |
LIST_FOREACH_SAFE(p, next, scanner->protocols->head) |
256 |
{ |
257 |
ppc = p->data; |
258 |
|
259 |
libopm_protocol_config_free(ppc); |
260 |
libopm_list_remove(scanner->protocols, p); |
261 |
libopm_node_free(p); |
262 |
} |
263 |
|
264 |
LIST_FOREACH_SAFE(p, next, scanner->scans->head) |
265 |
{ |
266 |
scan = p->data; |
267 |
libopm_scan_free(scan); |
268 |
libopm_list_remove(scanner->scans, p); |
269 |
libopm_node_free(p); |
270 |
} |
271 |
|
272 |
LIST_FOREACH_SAFE(p, next, scanner->queue->head) |
273 |
{ |
274 |
scan = p->data; |
275 |
libopm_scan_free(scan); |
276 |
libopm_list_remove(scanner->queue, p); |
277 |
libopm_node_free(p); |
278 |
} |
279 |
|
280 |
libopm_list_free(scanner->protocols); |
281 |
libopm_list_free(scanner->scans); |
282 |
libopm_list_free(scanner->queue); |
283 |
|
284 |
MyFree(scanner->callbacks); |
285 |
MyFree(scanner); |
286 |
} |
287 |
|
288 |
|
289 |
|
290 |
|
291 |
/* opm_config |
292 |
* |
293 |
* Wrapper to config_set. Set configuration variables |
294 |
* on the config struct. |
295 |
* |
296 |
* Parameters: |
297 |
* scanner: OPM_T struct the config struct resides in |
298 |
* key: Variable within the config struct to set |
299 |
* value: Address of value to set variable (key) to |
300 |
* |
301 |
* Return: |
302 |
* OPM_ERR_T containing error code |
303 |
*/ |
304 |
|
305 |
OPM_ERR_T opm_config(OPM_T *scanner, int key, const void *value) |
306 |
{ |
307 |
return libopm_config_set((scanner->config), key, value); |
308 |
} |
309 |
|
310 |
|
311 |
|
312 |
|
313 |
/* opm_addtype |
314 |
* |
315 |
* Add a proxy type and port to the list of protocols |
316 |
* a scanner will use. |
317 |
* |
318 |
* Parameters: |
319 |
* scanner: pointer to scanner struct |
320 |
* type: type of proxy to scan (used in hashing to the functions) |
321 |
* port: port this specific type/protocol will scan on |
322 |
* Return: |
323 |
* OPM_SUCCESS: Successful protocol add |
324 |
* OPM_ERR_BADPROTOCOL: Protocol is unknown |
325 |
*/ |
326 |
|
327 |
OPM_ERR_T opm_addtype(OPM_T *scanner, int type, unsigned short int port) |
328 |
{ |
329 |
unsigned int i; |
330 |
|
331 |
OPM_NODE_T *node; |
332 |
OPM_PROTOCOL_CONFIG_T *protocol_config; |
333 |
|
334 |
for(i = 0; i < sizeof(OPM_PROTOCOLS) / sizeof(OPM_PROTOCOL_T); i++) |
335 |
{ |
336 |
if(type == OPM_PROTOCOLS[i].type) |
337 |
{ |
338 |
protocol_config = libopm_protocol_config_create(); |
339 |
|
340 |
protocol_config->type = &OPM_PROTOCOLS[i]; |
341 |
protocol_config->port = port; |
342 |
|
343 |
node = libopm_node_create(protocol_config); |
344 |
libopm_list_add(scanner->protocols, node); |
345 |
|
346 |
return OPM_SUCCESS; |
347 |
|
348 |
} |
349 |
} |
350 |
return OPM_ERR_BADPROTOCOL; |
351 |
} |
352 |
|
353 |
|
354 |
|
355 |
/* opm_remote_addtype |
356 |
* |
357 |
* Add a proxy type and port to the list of protocols |
358 |
* a scanner will use. |
359 |
* |
360 |
* Parameters: |
361 |
* remote: pointer to scanner struct |
362 |
* type: type of proxy to scan (used in hashing to the functions) |
363 |
* port: port this specific type/protocol will scan on |
364 |
* Return: |
365 |
* OPM_SUCCESS: Successful protocol add |
366 |
* OPM_ERR_BADPROTOCOL: Protocol is unknown |
367 |
*/ |
368 |
|
369 |
OPM_ERR_T opm_remote_addtype(OPM_REMOTE_T *remote, int type, unsigned short int port) |
370 |
{ |
371 |
unsigned int i; |
372 |
|
373 |
OPM_NODE_T *node; |
374 |
OPM_PROTOCOL_CONFIG_T *protocol_config; |
375 |
|
376 |
for(i = 0; i < sizeof(OPM_PROTOCOLS) / sizeof(OPM_PROTOCOL_T); i++) |
377 |
{ |
378 |
if(type == OPM_PROTOCOLS[i].type) |
379 |
{ |
380 |
protocol_config = libopm_protocol_config_create(); |
381 |
|
382 |
protocol_config->type = &OPM_PROTOCOLS[i]; |
383 |
protocol_config->port = port; |
384 |
|
385 |
node = libopm_node_create(protocol_config); |
386 |
libopm_list_add(remote->protocols, node); |
387 |
|
388 |
return OPM_SUCCESS; |
389 |
} |
390 |
} |
391 |
return OPM_ERR_BADPROTOCOL; |
392 |
} |
393 |
|
394 |
|
395 |
|
396 |
|
397 |
/* libopm_protocol_create |
398 |
* |
399 |
* Create OPM_PROTOCOL_T struct. |
400 |
* |
401 |
* Parameters: |
402 |
* None |
403 |
* Return: |
404 |
* Pointer to new struct |
405 |
* |
406 |
* XXX - does not appear to be used anywhere? |
407 |
* -grifferz |
408 |
*/ |
409 |
|
410 |
#if 0 |
411 |
static OPM_PROTOCOL_T *libopm_protocol_create(void) |
412 |
{ |
413 |
OPM_PROTOCOL_T *ret; |
414 |
ret = xcalloc(sizeof(OPM_PROTOCOL_T)); |
415 |
|
416 |
ret->type = 0; |
417 |
ret->write_function = NULL; |
418 |
ret->read_function = NULL; |
419 |
|
420 |
return ret; |
421 |
} |
422 |
#endif |
423 |
|
424 |
|
425 |
/* libopm_protocol_free |
426 |
* |
427 |
* Free an OPM_PROTOCOL_T struct. Assume that if |
428 |
* format is not NULL, it is pointed to dynamically |
429 |
* allocated memory and free it. |
430 |
* |
431 |
* Parameters: |
432 |
* protocol: struct to free |
433 |
* |
434 |
* Return: |
435 |
* None |
436 |
* |
437 |
* XXX - apparently no longer used? |
438 |
* -grifferz |
439 |
*/ |
440 |
|
441 |
#if 0 |
442 |
static void libopm_protocol_free(OPM_PROTOCOL_T *protocol) |
443 |
{ |
444 |
MyFree(protocol); |
445 |
} |
446 |
#endif |
447 |
|
448 |
|
449 |
|
450 |
/* libopm_protocol_config_create |
451 |
* |
452 |
* Allocate and return address of a new OPM_PROTOCOL_CONFIG_T |
453 |
* |
454 |
* Parameters: |
455 |
* None |
456 |
* |
457 |
* Return: |
458 |
* Address of new OPM_PROTOCOL_CONFIG_T |
459 |
*/ |
460 |
|
461 |
static OPM_PROTOCOL_CONFIG_T *libopm_protocol_config_create(void) |
462 |
{ |
463 |
OPM_PROTOCOL_CONFIG_T *ret; |
464 |
ret = xcalloc(sizeof *ret); |
465 |
|
466 |
return ret; |
467 |
} |
468 |
|
469 |
|
470 |
|
471 |
|
472 |
/* protocol_config_free |
473 |
* |
474 |
* Free OPM_PROTOCOL_CONFIG_T struct |
475 |
* |
476 |
* Parameters: |
477 |
* protocol: struct to free |
478 |
* |
479 |
* Return: |
480 |
* None |
481 |
*/ |
482 |
|
483 |
static void libopm_protocol_config_free(OPM_PROTOCOL_CONFIG_T *protocol) |
484 |
{ |
485 |
MyFree(protocol); |
486 |
} |
487 |
|
488 |
|
489 |
|
490 |
|
491 |
/* opm_scan |
492 |
* |
493 |
* Scan remote host. The opm_scan function takes an OPM_REMOTE_T |
494 |
* struct, calculates the in_addr of the remote host, and creates |
495 |
* a scan list based on protocols defined in the scanner. |
496 |
* |
497 |
* Parameters: |
498 |
* scanner: Scanner to scan host on |
499 |
* remote: OPM_REMOTE_T defining remote host |
500 |
* |
501 |
* Return: |
502 |
* (to be written) |
503 |
*/ |
504 |
|
505 |
OPM_ERR_T opm_scan(OPM_T *scanner, OPM_REMOTE_T *remote) |
506 |
{ |
507 |
OPM_SCAN_T *scan; /* New scan for OPM_T */ |
508 |
OPM_NODE_T *node; /* Node we'll add scan to |
509 |
when we link it to scans */ |
510 |
unsigned int fd_limit; |
511 |
|
512 |
fd_limit = *(int *) libopm_config(scanner->config, OPM_CONFIG_FD_LIMIT); |
513 |
|
514 |
if(LIST_SIZE(scanner->protocols) == 0 && |
515 |
LIST_SIZE(remote->protocols) == 0) |
516 |
{ |
517 |
return OPM_ERR_NOPROTOCOLS; |
518 |
} |
519 |
|
520 |
scan = libopm_scan_create(scanner, remote); |
521 |
|
522 |
if(inet_pton(AF_INET, remote->ip, &(scan->addr.sa4.sin_addr) ) <= 0) |
523 |
{ |
524 |
libopm_scan_free(scan); |
525 |
return OPM_ERR_BADADDR; |
526 |
} |
527 |
|
528 |
node = libopm_node_create(scan); |
529 |
libopm_list_add(scanner->queue, node); |
530 |
|
531 |
return OPM_SUCCESS; |
532 |
} |
533 |
|
534 |
|
535 |
|
536 |
|
537 |
/* opm_end |
538 |
* |
539 |
* End a scan prematurely. |
540 |
* |
541 |
* Parameters: |
542 |
* scanner: Scanner to end scan on |
543 |
* remote: Pointer to remote struct to search for and end |
544 |
* |
545 |
* Return: |
546 |
* No return. OPM_CALLBACK_END will still be called as normal. |
547 |
*/ |
548 |
|
549 |
void opm_end(OPM_T *scanner, OPM_REMOTE_T *remote) |
550 |
{ |
551 |
OPM_NODE_T *node1, *node2, *next1, *next2; |
552 |
|
553 |
OPM_SCAN_T *scan; |
554 |
OPM_CONNECTION_T *conn; |
555 |
|
556 |
/* End active scans */ |
557 |
opm_endscan(scanner, remote); |
558 |
|
559 |
/* Secondly remove all traces of it in the queue. Once removed we have to call |
560 |
OPM_CALLBACK_END */ |
561 |
|
562 |
LIST_FOREACH_SAFE(node1, next1, scanner->queue->head) |
563 |
{ |
564 |
scan = node1->data; |
565 |
if(scan->remote == remote) |
566 |
{ |
567 |
/* Free all connections */ |
568 |
LIST_FOREACH_SAFE(node2, next2, scan->connections->head) |
569 |
{ |
570 |
|
571 |
conn = node2->data; |
572 |
|
573 |
libopm_list_remove(scan->connections, node2); |
574 |
libopm_connection_free(conn); |
575 |
libopm_node_free(node2); |
576 |
continue; |
577 |
} |
578 |
|
579 |
/* OPM_CALLBACK_END because check_closed normally handles this */ |
580 |
libopm_do_callback(scanner, scan->remote, OPM_CALLBACK_END, 0); |
581 |
|
582 |
/* Free up the scan */ |
583 |
libopm_list_remove(scanner->queue, node1); |
584 |
libopm_scan_free(scan); |
585 |
libopm_node_free(node1); |
586 |
} |
587 |
} |
588 |
} |
589 |
|
590 |
|
591 |
|
592 |
|
593 |
/* opm_endscan |
594 |
* |
595 |
* End a scan prematurely. Only end non-queued scans. This is useful |
596 |
* because it only checks the active scan list (saving time), where |
597 |
* opm_end checks both the scan and the possibly large queue. |
598 |
* |
599 |
* Parameters: |
600 |
* scanner: Scanner to end scan on |
601 |
* remote: Pointer to remote struct to search for and end |
602 |
* |
603 |
* Return: |
604 |
* No return. OPM_CALLBACK_END will still be called as normal. |
605 |
*/ |
606 |
|
607 |
void opm_endscan(OPM_T *scanner, OPM_REMOTE_T *remote) |
608 |
{ |
609 |
OPM_NODE_T *node1, *node2; |
610 |
|
611 |
OPM_SCAN_T *scan; |
612 |
OPM_CONNECTION_T *conn; |
613 |
|
614 |
/* |
615 |
First check to see if it's in the queue, if it is set all connections closed |
616 |
Next cycle of libopm_check_closed will take care of the garbage and handle |
617 |
OPM_CALLBACK_END |
618 |
*/ |
619 |
LIST_FOREACH(node1, scanner->scans->head) |
620 |
{ |
621 |
scan = node1->data; |
622 |
|
623 |
if(scan->remote == remote) |
624 |
{ |
625 |
LIST_FOREACH(node2, scan->connections->head) |
626 |
{ |
627 |
conn = (OPM_CONNECTION_T *) node2->data; |
628 |
conn->state = OPM_STATE_CLOSED; |
629 |
} |
630 |
} |
631 |
} |
632 |
} |
633 |
|
634 |
|
635 |
|
636 |
|
637 |
/* opm_active |
638 |
|
639 |
Return number of scans in a scanner left. |
640 |
|
641 |
Parameters: |
642 |
scanner: Scanner to return active scans on |
643 |
|
644 |
Return: |
645 |
Number of active scans, both queued and active. |
646 |
*/ |
647 |
|
648 |
size_t opm_active(OPM_T *scanner) |
649 |
{ |
650 |
return LIST_SIZE(scanner->queue) + LIST_SIZE(scanner->scans); |
651 |
} |
652 |
|
653 |
|
654 |
|
655 |
/* scan_create |
656 |
* |
657 |
* Create new OPM_SCAN_T struct |
658 |
* |
659 |
* Parameters: |
660 |
* scanner: Scanner the scan is being created for. This |
661 |
* is needed to get information on currently set |
662 |
* protocols/config. |
663 |
* |
664 |
* remote: Remote host this scan will be scanning |
665 |
* |
666 |
* Return |
667 |
* Address of new struct |
668 |
*/ |
669 |
static OPM_SCAN_T *libopm_scan_create(OPM_T *scanner, OPM_REMOTE_T *remote) |
670 |
{ |
671 |
OPM_SCAN_T *ret; |
672 |
OPM_CONNECTION_T *conn; |
673 |
OPM_NODE_T *node, *p; |
674 |
|
675 |
ret = xcalloc(sizeof *ret); |
676 |
|
677 |
ret->remote = remote; |
678 |
ret->connections = libopm_list_create(); |
679 |
|
680 |
/* Setup list of connections, one for each protocol */ |
681 |
LIST_FOREACH(p, scanner->protocols->head) |
682 |
{ |
683 |
conn = libopm_connection_create(); |
684 |
|
685 |
conn->protocol = ((OPM_PROTOCOL_CONFIG_T *) p->data)->type; |
686 |
conn->port = ((OPM_PROTOCOL_CONFIG_T *) p->data)->port; |
687 |
|
688 |
node = libopm_node_create(conn); |
689 |
|
690 |
libopm_list_add(ret->connections, node); |
691 |
} |
692 |
|
693 |
/* Do the same for any specific protocols the remote struct might be configured |
694 |
with */ |
695 |
|
696 |
LIST_FOREACH(p, remote->protocols->head) |
697 |
{ |
698 |
conn = libopm_connection_create(); |
699 |
|
700 |
conn->protocol = ((OPM_PROTOCOL_CONFIG_T *) p->data)->type; |
701 |
conn->port = ((OPM_PROTOCOL_CONFIG_T *) p->data)->port; |
702 |
|
703 |
node = libopm_node_create(conn); |
704 |
|
705 |
libopm_list_add(ret->connections, node); |
706 |
} |
707 |
|
708 |
memset(&(ret->addr), 0, sizeof(opm_sockaddr)); |
709 |
|
710 |
return ret; |
711 |
} |
712 |
|
713 |
|
714 |
|
715 |
|
716 |
/* scan_free |
717 |
* |
718 |
* Free and cleanup OPM_SCAN_T struct |
719 |
* |
720 |
* Parametsr: |
721 |
* scan: Scan struct to free |
722 |
* |
723 |
* Return: |
724 |
* None |
725 |
*/ |
726 |
|
727 |
static void libopm_scan_free(OPM_SCAN_T *scan) |
728 |
{ |
729 |
OPM_NODE_T *p, *next; |
730 |
OPM_CONNECTION_T *conn; |
731 |
|
732 |
LIST_FOREACH_SAFE(p, next, scan->connections->head) |
733 |
{ |
734 |
conn = p->data; |
735 |
libopm_connection_free(conn); |
736 |
|
737 |
libopm_list_remove(scan->connections, p); |
738 |
libopm_node_free(p); |
739 |
} |
740 |
libopm_list_free(scan->connections); |
741 |
|
742 |
MyFree(scan); |
743 |
} |
744 |
|
745 |
|
746 |
|
747 |
|
748 |
/* connection_create |
749 |
* |
750 |
* Allocate new OPM_CONNECTION_T |
751 |
* |
752 |
* Parameters: |
753 |
* None |
754 |
* |
755 |
* Return: |
756 |
* Address of new OPM_CONNECTION_T |
757 |
*/ |
758 |
|
759 |
static OPM_CONNECTION_T *libopm_connection_create(void) |
760 |
{ |
761 |
OPM_CONNECTION_T *ret; |
762 |
ret = xcalloc(sizeof *ret); |
763 |
|
764 |
ret->fd = 0; |
765 |
ret->bytes_read = 0; |
766 |
ret->readlen = 0; |
767 |
ret->protocol = 0; |
768 |
ret->port = 0; |
769 |
|
770 |
ret->state = OPM_STATE_UNESTABLISHED; |
771 |
|
772 |
return ret; |
773 |
} |
774 |
|
775 |
|
776 |
|
777 |
|
778 |
/* connection_free |
779 |
* |
780 |
* Free OPM_CONNECTION_T struct |
781 |
* |
782 |
* Parameters: |
783 |
* conn: Address of struct to free |
784 |
* |
785 |
* Return: |
786 |
* None |
787 |
*/ |
788 |
|
789 |
static void libopm_connection_free(OPM_CONNECTION_T *conn) |
790 |
{ |
791 |
MyFree(conn); |
792 |
} |
793 |
|
794 |
|
795 |
/* opm_cycle |
796 |
* |
797 |
* Perform tasks (called by client's loop) |
798 |
* |
799 |
* Parameters: |
800 |
* None |
801 |
* Return: |
802 |
* None |
803 |
*/ |
804 |
|
805 |
void opm_cycle(OPM_T *scanner) |
806 |
{ |
807 |
libopm_check_queue(scanner); /* Move scans from the queue to the live scan list */ |
808 |
libopm_check_establish(scanner); /* Make new connections if possible */ |
809 |
libopm_check_poll(scanner); /* Poll connections for IO and proxy test */ |
810 |
libopm_check_closed(scanner); /* Check for closed or timed out connections */ |
811 |
} |
812 |
|
813 |
|
814 |
|
815 |
|
816 |
/* check_queue |
817 |
* |
818 |
* Move scans from the queue to the live scan list as long as there is |
819 |
* room. |
820 |
* |
821 |
* Parameters: |
822 |
* scanner: Scanner to check queue on |
823 |
* |
824 |
* Return: |
825 |
* None |
826 |
*/ |
827 |
|
828 |
static void libopm_check_queue(OPM_T *scanner) |
829 |
{ |
830 |
OPM_NODE_T *node; |
831 |
OPM_SCAN_T *scan; |
832 |
|
833 |
unsigned int protocols, projected, fd_limit; |
834 |
|
835 |
if(LIST_SIZE(scanner->queue) == 0) |
836 |
return; |
837 |
|
838 |
fd_limit = *(int *) libopm_config(scanner->config, OPM_CONFIG_FD_LIMIT); |
839 |
|
840 |
projected = scanner->fd_use; |
841 |
|
842 |
/* We want to keep the live scan list as small as possible, so only |
843 |
move queued scans to the live list if they will not push above fd_limit */ |
844 |
while(LIST_SIZE(scanner->queue) > 0) |
845 |
{ |
846 |
|
847 |
/* Grab the top scan */ |
848 |
scan = scanner->queue->head->data; |
849 |
protocols = LIST_SIZE(scan->connections); |
850 |
|
851 |
/* Check if it will fit in the live scan list */ |
852 |
if((protocols + projected) > fd_limit) |
853 |
break; |
854 |
|
855 |
/* Scans on the top of the queue were added first, swap the head off the |
856 |
top of the queue and add it to the tail of the live scan list */ |
857 |
node = libopm_list_remove(scanner->queue, scanner->queue->head); |
858 |
libopm_list_add(scanner->scans, node); |
859 |
projected += protocols; |
860 |
} |
861 |
|
862 |
} |
863 |
|
864 |
|
865 |
|
866 |
|
867 |
/* check_establish |
868 |
* |
869 |
* Make new connections if there are free file descriptors and connections |
870 |
* to be made. |
871 |
* |
872 |
* Parameters: |
873 |
* scanner: Scanner to check for establish on |
874 |
* Return: |
875 |
* None |
876 |
*/ |
877 |
|
878 |
static void libopm_check_establish(OPM_T *scanner) |
879 |
{ |
880 |
OPM_NODE_T *node1, *node2; |
881 |
OPM_SCAN_T *scan; |
882 |
OPM_CONNECTION_T *conn; |
883 |
|
884 |
unsigned int fd_limit; |
885 |
|
886 |
if(LIST_SIZE(scanner->scans) == 0) |
887 |
return; |
888 |
|
889 |
fd_limit = *(int *) libopm_config(scanner->config, OPM_CONFIG_FD_LIMIT); |
890 |
|
891 |
if(scanner->fd_use >= fd_limit) |
892 |
return; |
893 |
|
894 |
LIST_FOREACH(node1, scanner->scans->head) |
895 |
{ |
896 |
scan = node1->data; |
897 |
LIST_FOREACH(node2, scan->connections->head) |
898 |
{ |
899 |
/* Only scan if we have free file descriptors */ |
900 |
if(scanner->fd_use >= fd_limit) |
901 |
return; |
902 |
|
903 |
conn = node2->data; |
904 |
if(conn->state == OPM_STATE_UNESTABLISHED) |
905 |
libopm_do_connect(scanner, scan, conn); |
906 |
} |
907 |
} |
908 |
} |
909 |
|
910 |
|
911 |
|
912 |
|
913 |
/* check_closed |
914 |
* |
915 |
* Check for connections which have timed out or are |
916 |
* closed. Connections timed out still need to be closed. |
917 |
* |
918 |
* Remove the connection from the list of connections, free |
919 |
* the connection struct and free the list node. Then if this is |
920 |
* the last connection of the scan, consider the scan completed and |
921 |
* free the scan aswell (and callback that the scan ended). |
922 |
* |
923 |
* Parameters: |
924 |
* scanner: Scanner to check on |
925 |
* Return: |
926 |
* None |
927 |
*/ |
928 |
|
929 |
static void libopm_check_closed(OPM_T *scanner) |
930 |
{ |
931 |
|
932 |
time_t present; |
933 |
OPM_NODE_T *node1, *node2, *next1, *next2; |
934 |
int timeout; |
935 |
|
936 |
OPM_SCAN_T *scan; |
937 |
OPM_CONNECTION_T *conn; |
938 |
|
939 |
if(LIST_SIZE(scanner->scans) == 0) |
940 |
return; |
941 |
|
942 |
time(&present); |
943 |
|
944 |
timeout = *(int *) libopm_config(scanner->config, OPM_CONFIG_TIMEOUT); |
945 |
|
946 |
LIST_FOREACH_SAFE(node1, next1, scanner->scans->head) |
947 |
{ |
948 |
scan = node1->data; |
949 |
LIST_FOREACH_SAFE(node2, next2, scan->connections->head) |
950 |
{ |
951 |
|
952 |
conn = node2->data; |
953 |
|
954 |
if(conn->state == OPM_STATE_CLOSED) |
955 |
{ |
956 |
if(conn->fd > 0) |
957 |
close(conn->fd); |
958 |
|
959 |
scanner->fd_use--; |
960 |
|
961 |
libopm_list_remove(scan->connections, node2); |
962 |
libopm_connection_free(conn); |
963 |
libopm_node_free(node2); |
964 |
continue; |
965 |
} |
966 |
|
967 |
if(((present - conn->creation) >= timeout) && |
968 |
conn->state != OPM_STATE_UNESTABLISHED) |
969 |
{ |
970 |
|
971 |
close(conn->fd); |
972 |
scanner->fd_use--; |
973 |
|
974 |
libopm_do_callback(scanner, libopm_setup_remote(scan->remote, conn), OPM_CALLBACK_TIMEOUT, 0); |
975 |
|
976 |
libopm_list_remove(scan->connections, node2); |
977 |
libopm_connection_free(conn); |
978 |
libopm_node_free(node2); |
979 |
|
980 |
continue; |
981 |
} |
982 |
} |
983 |
|
984 |
/* No more connections left in this scan, let the |
985 |
client know the scan has ended, then remove the |
986 |
scan from the scanner, and free it up */ |
987 |
if(LIST_SIZE(scan->connections) == 0) |
988 |
{ |
989 |
libopm_do_callback(scanner, scan->remote, OPM_CALLBACK_END, 0); |
990 |
|
991 |
libopm_list_remove(scanner->scans, node1); |
992 |
libopm_scan_free(scan); |
993 |
libopm_node_free(node1); |
994 |
} |
995 |
} |
996 |
} |
997 |
|
998 |
|
999 |
|
1000 |
|
1001 |
/* do_connect |
1002 |
* |
1003 |
* Call socket() and connect() to start a scan. |
1004 |
* |
1005 |
* Parametsr: |
1006 |
* scan: Scan struct containing the connection |
1007 |
* conn: Connection to establish |
1008 |
* Return: |
1009 |
* None |
1010 |
*/ |
1011 |
|
1012 |
static void libopm_do_connect(OPM_T * scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
1013 |
{ |
1014 |
opm_sockaddr *bind_ip; |
1015 |
|
1016 |
struct sockaddr_in *addr; /* Outgoing host */ |
1017 |
struct sockaddr_in local_addr; /* For binding */ |
1018 |
|
1019 |
addr = (struct sockaddr_in *) &(scan->addr.sa4); /* Already have the IP in byte format from opm_scan */ |
1020 |
|
1021 |
addr->sin_family = AF_INET; |
1022 |
addr->sin_port = htons(conn->port); |
1023 |
|
1024 |
|
1025 |
bind_ip = (opm_sockaddr *) libopm_config(scanner->config, OPM_CONFIG_BIND_IP); |
1026 |
|
1027 |
conn->fd = socket(PF_INET, SOCK_STREAM, 0); |
1028 |
scanner->fd_use++; /* Increase file descriptor use */ |
1029 |
|
1030 |
if(conn->fd == -1) |
1031 |
{ |
1032 |
libopm_do_callback(scanner, libopm_setup_remote(scan->remote, conn), OPM_CALLBACK_ERROR, OPM_ERR_NOFD); |
1033 |
conn->state = OPM_STATE_CLOSED; |
1034 |
return; |
1035 |
} |
1036 |
|
1037 |
if(bind_ip != NULL) |
1038 |
{ |
1039 |
memset(&local_addr, 0, sizeof(local_addr)); |
1040 |
local_addr.sin_addr.s_addr = bind_ip->sa4.sin_addr.s_addr; |
1041 |
local_addr.sin_family = AF_INET; |
1042 |
local_addr.sin_port = htons(0); |
1043 |
|
1044 |
if(bind(conn->fd, (struct sockaddr *) &(local_addr), sizeof(local_addr)) == -1) |
1045 |
{ |
1046 |
libopm_do_callback(scanner, libopm_setup_remote(scan->remote, conn), OPM_CALLBACK_ERROR, OPM_ERR_BIND); |
1047 |
conn->state = OPM_STATE_CLOSED; |
1048 |
return; |
1049 |
} |
1050 |
} |
1051 |
|
1052 |
/* Set socket non blocking */ |
1053 |
fcntl(conn->fd, F_SETFL, O_NONBLOCK); |
1054 |
|
1055 |
connect(conn->fd, (struct sockaddr *) addr, sizeof(*addr)); |
1056 |
|
1057 |
conn->state = OPM_STATE_ESTABLISHED; |
1058 |
time(&(conn->creation)); /* Stamp creation time, for timeout */ |
1059 |
} |
1060 |
|
1061 |
|
1062 |
/* check_poll |
1063 |
* |
1064 |
* Check sockets for ready read/write |
1065 |
* |
1066 |
* Parameters: |
1067 |
* scanner: Scanner to isolate check on |
1068 |
* Return: |
1069 |
* None |
1070 |
*/ |
1071 |
|
1072 |
static void libopm_check_poll(OPM_T *scanner) |
1073 |
{ |
1074 |
OPM_NODE_T *node1, *node2; |
1075 |
OPM_SCAN_T *scan; |
1076 |
OPM_CONNECTION_T *conn; |
1077 |
|
1078 |
static unsigned int ufds_size; |
1079 |
static struct pollfd *ufds = NULL; |
1080 |
|
1081 |
unsigned int size, i; |
1082 |
size = 0; |
1083 |
|
1084 |
/* Grow pollfd array (ufds) as needed */ |
1085 |
if(ufds_size < (*(unsigned int *) libopm_config(scanner->config, OPM_CONFIG_FD_LIMIT))) |
1086 |
{ |
1087 |
MyFree(ufds); |
1088 |
ufds = xcalloc((sizeof *ufds) * (*(unsigned int *) libopm_config(scanner->config, OPM_CONFIG_FD_LIMIT))); |
1089 |
ufds_size = (*(unsigned int *) libopm_config(scanner->config, OPM_CONFIG_FD_LIMIT)); |
1090 |
} |
1091 |
|
1092 |
if(LIST_SIZE(scanner->scans) == 0) |
1093 |
return; |
1094 |
|
1095 |
LIST_FOREACH(node1, scanner->scans->head) |
1096 |
{ |
1097 |
scan = node1->data; |
1098 |
LIST_FOREACH(node2, scan->connections->head) |
1099 |
{ |
1100 |
if(size >= ufds_size) |
1101 |
break; |
1102 |
|
1103 |
conn = node2->data; |
1104 |
|
1105 |
if(conn->state < OPM_STATE_ESTABLISHED || |
1106 |
conn->state == OPM_STATE_CLOSED) |
1107 |
continue; |
1108 |
|
1109 |
ufds[size].events = 0; |
1110 |
ufds[size].revents = 0; |
1111 |
ufds[size].fd = conn->fd; |
1112 |
|
1113 |
/* Check for HUNG UP. */ |
1114 |
ufds[size].events |= POLLHUP; |
1115 |
/* Check for INVALID FD */ |
1116 |
ufds[size].events |= POLLNVAL; |
1117 |
|
1118 |
switch(conn->state) |
1119 |
{ |
1120 |
case OPM_STATE_ESTABLISHED: |
1121 |
ufds[size].events |= POLLOUT; |
1122 |
break; |
1123 |
case OPM_STATE_NEGSENT: |
1124 |
ufds[size].events |= POLLIN; |
1125 |
break; |
1126 |
} |
1127 |
size++; |
1128 |
} |
1129 |
|
1130 |
} |
1131 |
|
1132 |
switch (poll(ufds, size, 0)) |
1133 |
{ |
1134 |
case -1: |
1135 |
/* error in select/poll */ |
1136 |
return; |
1137 |
case 0: |
1138 |
/* Nothing to do */ |
1139 |
return; |
1140 |
/* Pass pointer to connection to handler. */ |
1141 |
} |
1142 |
|
1143 |
LIST_FOREACH(node1, scanner->scans->head) |
1144 |
{ |
1145 |
scan = (OPM_SCAN_T *) node1->data; |
1146 |
|
1147 |
LIST_FOREACH(node2, scan->connections->head) |
1148 |
{ |
1149 |
conn = (OPM_CONNECTION_T *) node2->data; |
1150 |
|
1151 |
for(i = 0; i < size; i++) |
1152 |
{ |
1153 |
if((ufds[i].fd == conn->fd) && (conn->state != OPM_STATE_CLOSED)) |
1154 |
{ |
1155 |
if(ufds[i].revents & POLLIN) |
1156 |
libopm_do_readready(scanner, scan, conn); |
1157 |
if(ufds[i].revents & POLLOUT) |
1158 |
libopm_do_writeready(scanner, scan, conn); |
1159 |
if(ufds[i].revents & POLLHUP) |
1160 |
libopm_do_hup(scanner, scan, conn); |
1161 |
} |
1162 |
} |
1163 |
} |
1164 |
} |
1165 |
} |
1166 |
|
1167 |
|
1168 |
|
1169 |
|
1170 |
/* do_readready |
1171 |
* |
1172 |
* Remote connection is read ready, read the data into a buffer and check it against |
1173 |
* the target_string if neccessary |
1174 |
* |
1175 |
* Parameters: |
1176 |
* scanner: Scanner doing the scan |
1177 |
* scan: Specific scan |
1178 |
* conn: Specific connection in the scan |
1179 |
* |
1180 |
* Return: |
1181 |
* None |
1182 |
*/ |
1183 |
|
1184 |
static void libopm_do_readready(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
1185 |
{ |
1186 |
|
1187 |
int max_read; |
1188 |
char c; |
1189 |
|
1190 |
/* If protocol has a specific read function, call that instead of |
1191 |
reading data from here. */ |
1192 |
if(conn->protocol->read_function) |
1193 |
{ |
1194 |
conn->protocol->read_function(scanner, scan, conn); |
1195 |
return; |
1196 |
} |
1197 |
|
1198 |
max_read = *(int *) libopm_config(scanner->config, OPM_CONFIG_MAX_READ); |
1199 |
|
1200 |
while(1) |
1201 |
{ |
1202 |
switch (read(conn->fd, &c, 1)) |
1203 |
{ |
1204 |
case 0: |
1205 |
libopm_do_hup(scanner, scan, conn); |
1206 |
return; |
1207 |
|
1208 |
case -1: |
1209 |
if(errno != EAGAIN) |
1210 |
libopm_do_hup(scanner, scan, conn); |
1211 |
return; |
1212 |
|
1213 |
default: |
1214 |
|
1215 |
conn->bytes_read++; |
1216 |
|
1217 |
if(conn->bytes_read >= max_read) |
1218 |
{ |
1219 |
libopm_do_callback(scanner, libopm_setup_remote(scan->remote, conn), OPM_CALLBACK_ERROR, OPM_ERR_MAX_READ); |
1220 |
conn->state = OPM_STATE_CLOSED; |
1221 |
return; |
1222 |
} |
1223 |
|
1224 |
if(c == '\0' || c == '\r') |
1225 |
continue; |
1226 |
|
1227 |
if(c == '\n') |
1228 |
{ |
1229 |
conn->readbuf[conn->readlen] = '\0'; |
1230 |
conn->readlen = 0; |
1231 |
libopm_do_read(scanner, scan, conn); |
1232 |
|
1233 |
if(conn->state == OPM_STATE_CLOSED) |
1234 |
return; |
1235 |
|
1236 |
continue; |
1237 |
} |
1238 |
|
1239 |
if(conn->readlen < READBUFLEN) |
1240 |
{ /* -1 to pad for null term */ |
1241 |
conn->readbuf[++(conn->readlen) - 1] = c; |
1242 |
} |
1243 |
} |
1244 |
} |
1245 |
} |
1246 |
|
1247 |
|
1248 |
|
1249 |
|
1250 |
/* do_read |
1251 |
* |
1252 |
* A line of data has been read from the socket, check it against |
1253 |
* target string. |
1254 |
* |
1255 |
* |
1256 |
* |
1257 |
* Parameters: |
1258 |
* scanner: Scanner doing the scan |
1259 |
* scan: Specific scan |
1260 |
* conn: Specific connection in the scan |
1261 |
* |
1262 |
* Return: |
1263 |
* None |
1264 |
*/ |
1265 |
|
1266 |
static void libopm_do_read(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
1267 |
{ |
1268 |
OPM_LIST_T *list; |
1269 |
OPM_NODE_T *node; |
1270 |
char *target_string; |
1271 |
|
1272 |
/* Check readbuf against target strings */ |
1273 |
list = (OPM_LIST_T *) libopm_config(scanner->config, OPM_CONFIG_TARGET_STRING); |
1274 |
LIST_FOREACH(node, list->head) |
1275 |
{ |
1276 |
target_string = node->data; |
1277 |
if(strstr(conn->readbuf, target_string)) |
1278 |
{ |
1279 |
libopm_do_openproxy(scanner, scan, conn); |
1280 |
break; |
1281 |
} |
1282 |
} |
1283 |
} |
1284 |
|
1285 |
|
1286 |
/* do_openproxy |
1287 |
* |
1288 |
* An open proxy was found on connection conn. Cleanup the connection and |
1289 |
* call the appropriate callback to let the client know the proxy was found. |
1290 |
* |
1291 |
* Parameters: |
1292 |
* scanner: Scanner doing the scan |
1293 |
* scan: Specific scan |
1294 |
* conn: Specific connection in the scan |
1295 |
* |
1296 |
* Return: |
1297 |
* None |
1298 |
*/ |
1299 |
|
1300 |
static void libopm_do_openproxy(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
1301 |
{ |
1302 |
OPM_REMOTE_T *remote; |
1303 |
|
1304 |
remote = scan->remote; |
1305 |
|
1306 |
/* Mark the connection for close */ |
1307 |
conn->state = OPM_STATE_CLOSED; |
1308 |
|
1309 |
/* Call client's open proxy callback */ |
1310 |
libopm_do_callback(scanner, libopm_setup_remote(scan->remote, conn), OPM_CALLBACK_OPENPROXY, 0); |
1311 |
} |
1312 |
|
1313 |
|
1314 |
|
1315 |
|
1316 |
/* do_writeready |
1317 |
* |
1318 |
* Remote connection is write ready, call the specific protocol |
1319 |
* function for writing to this socket. |
1320 |
* |
1321 |
* Parameters: |
1322 |
* scanner: Scanner doing the scan |
1323 |
* scan: Specific scan |
1324 |
* conn: Specific connection in the scan |
1325 |
* |
1326 |
* Return: |
1327 |
* None |
1328 |
*/ |
1329 |
|
1330 |
static void libopm_do_writeready(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
1331 |
{ |
1332 |
OPM_PROTOCOL_T *protocol; |
1333 |
|
1334 |
protocol = conn->protocol; |
1335 |
|
1336 |
/* Call write function for specific protocol */ |
1337 |
if(protocol->write_function) |
1338 |
protocol->write_function(scanner, scan, conn); |
1339 |
|
1340 |
/* Flag as NEGSENT so we don't have to send data again*/ |
1341 |
conn->state = OPM_STATE_NEGSENT; |
1342 |
} |
1343 |
|
1344 |
|
1345 |
|
1346 |
|
1347 |
/* do_hup |
1348 |
* |
1349 |
* Connection ended prematurely |
1350 |
* |
1351 |
* Parameters: |
1352 |
* scanner: Scanner doing the scan |
1353 |
* scan: Specific scan |
1354 |
* conn: Specific connection in the scan |
1355 |
* error: OPM_ERR_T containing the error type |
1356 |
* Return: |
1357 |
* None |
1358 |
*/ |
1359 |
|
1360 |
static void libopm_do_hup(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
1361 |
{ |
1362 |
OPM_REMOTE_T *remote; |
1363 |
|
1364 |
remote = scan->remote; |
1365 |
|
1366 |
/* Mark the connection for close */ |
1367 |
conn->state = OPM_STATE_CLOSED; |
1368 |
|
1369 |
libopm_do_callback(scanner, libopm_setup_remote(scan->remote, conn), OPM_CALLBACK_NEGFAIL, 0); |
1370 |
} |
1371 |
|
1372 |
|
1373 |
|
1374 |
|
1375 |
/* do_callback |
1376 |
* |
1377 |
* Call callback |
1378 |
* |
1379 |
* Parameters: |
1380 |
* scanner: scanner remote is on |
1381 |
* remote: remote callback is for |
1382 |
* type: callback type |
1383 |
* var: optional var passed back (error codes, etc ) |
1384 |
* Return: |
1385 |
* None |
1386 |
*/ |
1387 |
|
1388 |
static void libopm_do_callback(OPM_T *scanner, OPM_REMOTE_T *remote, int type, int var) |
1389 |
{ |
1390 |
/* Callback is out of range */ |
1391 |
if(type < 0 || type >= (CBLEN + 1)) |
1392 |
return; |
1393 |
|
1394 |
if(scanner->callbacks[type].func) |
1395 |
(scanner->callbacks[type].func) (scanner, remote, var, scanner->callbacks[type].data); |
1396 |
} |
1397 |
|
1398 |
|
1399 |
|
1400 |
|
1401 |
/* setup_remote |
1402 |
* |
1403 |
* Setup an OPM_REMOTE_T with information from an OPM_CONNECTION_T |
1404 |
* for callback |
1405 |
* |
1406 |
* Parameters: |
1407 |
* remote, conn |
1408 |
* |
1409 |
* Return: |
1410 |
* remote |
1411 |
*/ |
1412 |
|
1413 |
static OPM_REMOTE_T *libopm_setup_remote(OPM_REMOTE_T *remote, OPM_CONNECTION_T *conn) |
1414 |
{ |
1415 |
remote->port = conn->port; |
1416 |
remote->bytes_read = conn->bytes_read; |
1417 |
remote->protocol = conn->protocol->type; |
1418 |
|
1419 |
return remote; |
1420 |
} |