Repository navigation
Expand file tree
/
Copy pathupnpevents.c
More file actions
573 lines (548 loc) · 13.8 KB
/
Copy pathupnpevents.c
File metadata and controls
573 lines (548 loc) · 13.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
/* $Id: upnpevents.c,v 1.27 2013/06/13 13:21:30 nanard Exp $ */
/* MiniUPnP project
* http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
* (c) 2008-2013 Thomas Bernard
* This software is subject to the conditions detailed
* in the LICENCE file provided within the distribution */
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <sys/queue.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include "config.h"
#include "upnpevents.h"
#include "miniupnpdpath.h"
#include "upnpglobalvars.h"
#include "upnpdescgen.h"
#include "upnputils.h"
#ifdef ENABLE_EVENTS
/*enum subscriber_service_enum {
EWanCFG = 1,
EWanIPC,
EL3F
};*/
/* stuctures definitions */
struct subscriber {
LIST_ENTRY(subscriber) entries;
struct upnp_event_notify * notify;
time_t timeout;
uint32_t seq;
enum subscriber_service_enum service;
char uuid[42];
char callback[];
};
struct upnp_event_notify {
LIST_ENTRY(upnp_event_notify) entries;
int s; /* socket */
enum { ECreated=1,
EConnecting,
ESending,
EWaitingForResponse,
EFinished,
EError } state;
struct subscriber * sub;
char * buffer;
int buffersize;
int tosend;
int sent;
const char * path;
#ifdef ENABLE_IPV6
int ipv6;
char addrstr[48];
#else
char addrstr[16];
#endif
char portstr[8];
};
/* prototypes */
static void
upnp_event_create_notify(struct subscriber * sub);
/* Subscriber list */
LIST_HEAD(listhead, subscriber) subscriberlist = { NULL };
/* notify list */
LIST_HEAD(listheadnotif, upnp_event_notify) notifylist = { NULL };
/* create a new subscriber */
static struct subscriber *
newSubscriber(const char * eventurl, const char * callback, int callbacklen)
{
struct subscriber * tmp;
if(!eventurl || !callback || !callbacklen)
return NULL;
tmp = calloc(1, sizeof(struct subscriber)+callbacklen+1);
if(!tmp)
return NULL;
if(strcmp(eventurl, WANCFG_EVENTURL)==0)<
8000
/div>
tmp->service = EWanCFG;
else if(strcmp(eventurl, WANIPC_EVENTURL)==0)
tmp->service = EWanIPC;
#ifdef ENABLE_L3F_SERVICE
else if(strcmp(eventurl, L3F_EVENTURL)==0)
tmp->service = EL3F;
#endif
#ifdef ENABLE_6FC_SERVICE
else if(strcmp(eventurl, WANIP6FC_EVENTURL)==0)
tmp->service = E6FC;
#endif
#ifdef ENABLE_DP_SERVICE
else if(strcmp(eventurl, DP_EVENTURL)==0)
tmp->service = EDP;
#endif
else {
free(tmp);
return NULL;
}
memcpy(tmp->callback, callback, callbacklen);
tmp->callback[callbacklen] = '\0';
/* make a dummy uuid */
/* TODO: improve that */
strncpy(tmp->uuid, uuidvalue_igd, sizeof(tmp->uuid));
tmp->uuid[sizeof(tmp->uuid)-1] = '\0';
snprintf(tmp->uuid+37, 5, "%04lx", random() & 0xffff);
return tmp;
}
/* creates a new subscriber and adds it to the subscriber list
* also initiate 1st notify
* TODO : add a check on the number of subscriber in order to
* prevent memory overflow... */
const char *
upnpevents_addSubscriber(const char * eventurl,
const char * callback, int callbacklen,
int timeout)
{
struct subscriber * tmp;
/*static char uuid[42];*/
/* "uuid:00000000-0000-0000-0000-000000000000"; 5+36+1=42bytes */
syslog(LOG_DEBUG, "addSubscriber(%s, %.*s, %d)",
eventurl, callbacklen, callback, timeout);
/*strncpy(uuid, uuidvalue, sizeof(uuid));
uuid[sizeof(uuid)-1] = '\0';*/
tmp = newSubscriber(eventurl, callback, callbacklen);
if(!tmp)
return NULL;
if(timeout)
tmp->timeout = time(NULL) + timeout;
LIST_INSERT_HEAD(&subscriberlist, tmp, entries);
upnp_event_create_notify(tmp);
return tmp->uuid;
}
/* renew a subscription (update the timeout) */
int
renewSubscription(const char * sid, int sidlen, int timeout)
{
struct subscriber * sub;
for(sub = subscriberlist.lh_first; sub != NULL; sub = sub->entries.le_next) {
if((sidlen == 41) && (memcmp(sid, sub->uuid, 41) == 0)) {
sub->timeout = (timeout ? time(NULL) + timeout : 0);
return 0;
}
}
return -1;
}
int
upnpevents_removeSubscriber(const char * sid, int sidlen)
{
struct subscriber * sub;
if(!sid)
return -1;
for(sub = subscriberlist.lh_first; sub != NULL; sub = sub->entries.le_next) {
if((sidlen == 41) && (memcmp(sid, sub->uuid, 41) == 0)) {
if(sub->notify) {
sub->notify->sub = NULL;
}
LIST_REMOVE(sub, entries);
free(sub);
return 0;
}
}
return -1;
}
/* notifies all subscriber of a number of port mapping change
* or external ip address change */
void
upnp_event_var_change_notify(enum subscriber_service_enum service)
{
struct subscriber * sub;
for(sub = subscriberlist.lh_first; sub != NULL; sub = sub->entries.le_next) {
if(sub->service == service && sub->notify == NULL)
upnp_event_create_notify(sub);
}
}
/* create and add the notify object to the list */
static void
upnp_event_create_notify(struct subscriber * sub)
{
struct upnp_event_notify * obj;
obj = calloc(1, sizeof(struct upnp_event_notify));
if(!obj) {
syslog(LOG_ERR, "%s: calloc(): %m", "upnp_event_create_notify");
return;
}
obj->sub = sub;
obj->state = ECreated;
#ifdef ENABLE_IPV6
obj->s = socket((obj->sub->callback[7] == '[') ? PF_INET6 : PF_INET,
SOCK_STREAM, 0);
#else
obj->s = socket(PF_INET, SOCK_STREAM, 0);
#endif
if(obj->s<0) {
syslog(LOG_ERR, "%s: socket(): %m", "upnp_event_create_notify");
goto error;
}
if(!set_non_blocking(obj->s)) {
syslog(LOG_ERR, "%s: set_non_blocking(): %m",
"upnp_event_create_notify");
goto error;
}
if(sub)
sub->notify = obj;
LIST_INSERT_HEAD(¬ifylist, obj, entries);
return;
error:
if(obj->s >= 0)
close(obj->s);
free(obj);
}
static void
upnp_event_notify_connect(struct upnp_event_notify * obj)
{
unsigned int i;
const char * p;
unsigned short port;
#ifdef ENABLE_IPV6
struct sockaddr_storage addr;
#else
struct sockaddr_in addr;
#endif
if(!obj)
return;
memset(&addr, 0, sizeof(addr));
i = 0;
if(obj->sub == NULL) {
obj->state = EError;
return;
}
p = obj->sub->callback;
p += 7; /* http:// */
#ifdef ENABLE_IPV6
if(*p == '[') { /* ip v6 */
p++;
obj->ipv6 = 1;
while(*p != ']' && i < (sizeof(obj->addrstr)-1))
obj->addrstr[i++] = *(p++);
if(*p == ']')
p++;
} else {
#endif
while(*p != '/' && *p != ':' && i < (sizeof(obj->addrstr)-1))
obj->addrstr[i++] = *(p++);
#ifdef ENABLE_IPV6
}
#endif
obj->addrstr[i] = '\0';
if(*p == ':') {
obj->portstr[0] = *p;
i = 1;
p++;
port = (unsigned short)atoi(p);
while(*p != '/') {
if(i<7) obj->portstr[i++] = *p;
p++;
}
obj->portstr[i] = 0;
} else {
port = 80;
obj->portstr[0] = '\0';
}
obj->path = p;
#ifdef ENABLE_IPV6
if(obj->ipv6) {
struct sockaddr_in6 * sa = (struct sockaddr_in6 *)&addr;
sa->sin6_family = AF_INET6;
inet_pton(AF_INET6, obj->addrstr, &(sa->sin6_addr));
sa->sin6_port = htons(port);
} else {
struct sockaddr_in * sa = (struct sockaddr_in *)&addr;
sa->sin_family = AF_INET;
inet_pton(AF_INET, obj->addrstr, &(sa->sin_addr));
sa->sin_port = htons(port);
}
#else
addr.sin_family = AF_INET;
inet_aton(obj->addrstr, &addr.sin_addr);
addr.sin_port = htons(port);
#endif
syslog(LOG_DEBUG, "%s: '%s' %hu '%s'", "upnp_event_notify_connect",
obj->addrstr, port, obj->path);
obj->state = EConnecting;
if(connect(obj->s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
if(errno != EINPROGRESS && errno != EWOULDBLOCK) {
syslog(LOG_ERR, "%s: connect(): %m", "upnp_event_notify_connect");
obj->state = EError;
}
}
}
static void upnp_event_prepare(struct upnp_event_notify * obj)
{
static const char notifymsg[] =
"NOTIFY %s HTTP/1.1\r\n"
"Host: %s%s\r\n"
"Content-Type: text/xml\r\n"
"Content-Length: %d\r\n"
"NT: upnp:event\r\n"
"NTS: upnp:propchange\r\n"
"SID: %s\r\n"
"SEQ: %u\r\n"
"Connection: close\r\n"
"Cache-Control: no-cache\r\n"
"\r\n"
"%.*s\r\n";
char * xml;
int l;
if(obj->sub == NULL) {
obj->state = EError;
return;
}
switch(obj->sub->service) {
case EWanCFG:
xml = getVarsWANCfg(&l);
break;
case EWanIPC:
xml = getVarsWANIPCn(&l);
break;
#ifdef ENABLE_L3F_SERVICE
case EL3F:
xml = getVarsL3F(&l);
break;
#endif
#ifdef ENABLE_6FC_SERVICE
case E6FC:
xml = getVars6FC(&l);
break;
#endif
#ifdef ENABLE_DP_SERVICE
case EDP:
xml = getVarsDP(&l);
break;
#endif
default:
xml = NULL;
<
8000
div>
l = 0;
}
obj->buffersize = 1024;
obj->buffer = malloc(obj->buffersize);
if(!obj->buffer) {
syslog(LOG_ERR, "%s: malloc returned NULL", "upnp_event_prepare");
if(xml) {
free(xml);
}
obj->state = EError;
return;
}
obj->tosend = snprintf(obj->buffer, obj->buffersize, notifymsg,
obj->path, obj->addrstr, obj->portstr, l+2,
obj->sub->uuid, obj->sub->seq,
l, xml);
if(xml) {
free(xml);
xml = NULL;
}
obj->state = ESending;
}
static void upnp_event_send(struct upnp_event_notify * obj)
{
int i;
syslog(LOG_DEBUG, "%s: sending event notify message to %s:%s",
"upnp_event_send", obj->addrstr, obj->portstr);
syslog(LOG_DEBUG, "%s: msg: %s",
"upnp_event_send", obj->buffer + obj->sent);
i = send(obj->s, obj->buffer + obj->sent, obj->tosend - obj->sent, 0);
if(i<0) {
if(errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR) {
syslog(LOG_NOTICE, "%s: send(): %m", "upnp_event_send");
obj->state = EError;
return;
} else {
/* EAGAIN or EWOULDBLOCK or EINTR : no data sent */
i = 0;
}
}
if(i != (obj->tosend - obj->sent))
syslog(LOG_NOTICE, "%s: %d bytes send out of %d",
"upnp_event_send", i, obj->tosend - obj->sent);
obj->sent += i;
if(obj->sent == obj->tosend)
obj->state = EWaitingForResponse;
}
static void upnp_event_recv(struct upnp_event_notify * obj)
{
int n;
n = recv(obj->s, obj->buffer, obj->buffersize, 0);
if(n<0) {
if(errno != EAGAIN &&
errno != EWOULDBLOCK &&
errno != EINTR) {
syslog(LOG_ERR, "%s: recv(): %m", "upnp_event_recv");
obj->state = EError;
}
return;
}
syslog(LOG_DEBUG, "%s: (%dbytes) %.*s", "upnp_event_recv",
n, n, obj->buffer);
/* TODO : do something with the data recevied ?
* right now, n (number of bytes received) is ignored
* We may need to recv() more bytes. */
obj->state = EFinished;
if(obj->sub)
obj->sub->seq++;
}
static void
upnp_event_process_notify(struct upnp_event_notify * obj)
{
int err;
socklen_t len;
switch(obj->state) {
case EConnecting:
/* now connected or failed to connect */
len = sizeof(err);
if(getsockopt(obj->s, SOL_SOCKET, SO_ERROR, &err, &len) < 0) {
syslog(LOG_ERR, "%s: getsockopt: %m", "upnp_event_process_notify");
obj->state = EError;
break;
}
if(err != 0) {
errno = err;
syslog(LOG_WARNING, "%s: connect failed: %m", "upnp_event_process_notify");
obj->state = EError;
break;
}
upnp_event_prepare(obj);
if(obj->state == ESending)
upnp_event_send(obj);
break;
case ESending:
upnp_event_send(obj);
break;
case EWaitingForResponse:
upnp_event_recv(obj);
break;
case EFinished:
close(obj->s);
obj->s = -1;
break;
default:
syslog(LOG_ERR, "%s: unknown state", "upnp_event_process_notify");
}
}
void upnpevents_selectfds(fd_set *readset, fd_set *writeset, int * max_fd)
{
struct upnp_event_notify * obj;
for(obj = notifylist.lh_first; obj != NULL; obj = obj->entries.le_next) {
syslog(LOG_DEBUG, "upnpevents_selectfds: %p %d %d",
obj, obj->state, obj->s);
if(obj->s >= 0) {
switch(obj->state) {
case ECreated:
upnp_event_notify_connect(obj);
if(obj->state != EConnecting)
break;
case EConnecting:
case ESending:
FD_SET(obj->s, writeset);
if(obj->s > *max_fd)
*max_fd = obj->s;
break;
case EWaitingForResponse:
FD_SET(obj->s, readset);
if(obj->s > *max_fd)
*max_fd = obj->s;
break;
default:
;
}
}
}
}
void upnpevents_processfds(fd_set *readset, fd_set *writeset)
{
struct upnp_event_notify * obj;
struct upnp_event_notify * next;
struct subscriber * sub;
struct subscriber * subnext;
time_t curtime;
for(obj = notifylist.lh_first; obj != NULL; obj = obj->entries.le_next) {
syslog(LOG_DEBUG, "%s: %p %d %d %d %d",
"upnpevents_processfds", obj, obj->state, obj->s,
FD_ISSET(obj->s, readset), FD_ISSET(obj->s, writeset));
if(obj->s >= 0) {
if(FD_ISSET(obj->s, readset) || FD_ISSET(obj->s, writeset))
upnp_event_process_notify(obj);
}
}
obj = notifylist.lh_first;
while(obj != NULL) {
next = obj->entries.le_next;
if(obj->state == EError || obj->state == EFinished) {
if(obj->s >= 0) {
close(obj->s);
}
if(obj->sub)
obj->sub->notify = NULL;
/* remove also the subscriber from the list if there was an error */
if(obj->state == EError && obj->sub) {
LIST_REMOVE(obj->sub, entries);
free(obj->sub);
}
if(obj->buffer) {
free(obj->buffer);
}
LIST_REMOVE(obj, entries);
free(obj);
}
obj = next;
}
/* remove timeouted subscribers */
curtime = time(NULL);
for(sub = subscriberlist.lh_first; sub != NULL; ) {
subnext = sub->entries.le_next;
if(sub->timeout && curtime > sub->timeout && sub->notify == NULL) {
LIST_REMOVE(sub, entries);
free(sub);
}
sub = subnext;
}
}
#ifdef USE_MINIUPNPDCTL
void write_events_details(int s) {
int n;
char buff[80];
struct upnp_event_notify * obj;
struct subscriber * sub;
write(s, "Events details :\n", 17);
for(obj = notifylist.lh_first; obj != NULL; obj = obj->entries.le_next) {
n = snprintf(buff, sizeof(buff), " %p sub=%p state=%d s=%d\n",
obj, obj->sub, obj->state, obj->s);
write(s, buff, n);
}
write(s, "Subscribers :\n", 14);
for(sub = subscriberlist.lh_first; sub != NULL; sub = sub->entries.le_next) {
n = snprintf(buff, sizeof(buff), " %p timeout=%d seq=%u service=%d\n",
sub, (int)sub->timeout, sub->seq, sub->service);
write(s, buff, n);
n = snprintf(buff, sizeof(buff), " notify=%p %s\n",
sub->notify, sub->uuid);
write(s, buff, n);
n = snprintf(buff, sizeof(buff), " %s\n",
sub->callback);
write(s, buff, n);
}
}
#endif
#endif