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
|
/*
This file is part of libmicrospdy
Copyright (C) 2012 Andrey Uzunov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file daemon.c
* @brief daemon functionality
* @author Andrey Uzunov
*/
#include "platform.h"
#include "structures.h"
#include "internal.h"
#include "session.h"
#include "io.h"
/**
* Default implementation of the panic function,
* prints an error message and aborts.
*
* @param cls unused
* @param file name of the file with the problem
* @param line line number with the problem
* @param reason error message with details
*/
static void
spdyf_panic_std (void *cls,
const char *file,
unsigned int line,
const char *reason)
{
(void)cls;
fprintf (stdout, "Fatal error in libmicrospdy %s:%u: %s\n",
file, line, reason);
//raise(SIGINT); //used for gdb
abort ();
}
/**
* Global handler for fatal errors.
*/
SPDY_PanicCallback spdyf_panic = &spdyf_panic_std;
/**
* Global closure argument for "spdyf_panic".
*/
void *spdyf_panic_cls;
/**
* Free resources associated with all closed connections.
* (destroy responses, free buffers, etc.).
*
* @param daemon daemon to clean up
*/
static void
spdyf_cleanup_sessions (struct SPDY_Daemon *daemon)
{
struct SPDY_Session *session;
while (NULL != (session = daemon->cleanup_head))
{
DLL_remove (daemon->cleanup_head,
daemon->cleanup_tail,
session);
SPDYF_session_destroy(session);
}
}
/**
* Closing of all connections handled by the daemon.
*
* @param daemon SPDY daemon
*/
static void
spdyf_close_all_sessions (struct SPDY_Daemon *daemon)
{
struct SPDY_Session *session;
while (NULL != (session = daemon->sessions_head))
{
//prepare GOAWAY frame
SPDYF_prepare_goaway(session, SPDY_GOAWAY_STATUS_OK, true);
//try to send the frame (it is best effort, so it will maybe sent)
SPDYF_session_write(session,true);
SPDYF_session_close(session);
}
spdyf_cleanup_sessions(daemon);
}
/**
* Parse a list of options given as varargs.
*
* @param daemon the daemon to initialize
* @param valist the options
* @return SPDY_YES on success, SPDY_NO on error
*/
static int
spdyf_parse_options_va (struct SPDY_Daemon *daemon,
va_list valist)
{
enum SPDY_DAEMON_OPTION opt;
while (SPDY_DAEMON_OPTION_END != (opt = (enum SPDY_DAEMON_OPTION) va_arg (valist, int)))
{
if(opt & daemon->options)
{
SPDYF_DEBUG("Daemon option %i used twice",opt);
return SPDY_NO;
}
daemon->options |= opt;
switch (opt)
{
case SPDY_DAEMON_OPTION_SESSION_TIMEOUT:
daemon->session_timeout = va_arg (valist, unsigned int) * 1000;
break;
case SPDY_DAEMON_OPTION_SOCK_ADDR:
daemon->address = va_arg (valist, struct sockaddr *);
break;
case SPDY_DAEMON_OPTION_FLAGS:
daemon->flags = va_arg (valist, enum SPDY_DAEMON_FLAG);
break;
case SPDY_DAEMON_OPTION_IO_SUBSYSTEM:
daemon->io_subsystem = va_arg (valist, enum SPDY_IO_SUBSYSTEM);
break;
case SPDY_DAEMON_OPTION_MAX_NUM_FRAMES:
daemon->max_num_frames = va_arg (valist, uint32_t);
break;
default:
SPDYF_DEBUG("Wrong option for the daemon %i",opt);
return SPDY_NO;
}
}
return SPDY_YES;
}
void
SPDY_set_panic_func (SPDY_PanicCallback cb,
void *cls)
{
spdyf_panic = cb;
spdyf_panic_cls = cls;
}
struct SPDY_Daemon *
SPDYF_start_daemon_va (uint16_t port,
const char *certfile,
const char *keyfile,
SPDY_NewSessionCallback nscb,
SPDY_SessionClosedCallback sccb,
SPDY_NewRequestCallback nrcb,
SPDY_NewPOSTDataCallback npdcb,
SPDYF_NewStreamCallback fnscb,
void * cls,
void * fcls,
va_list valist)
{
struct SPDY_Daemon *daemon = NULL;
int afamily;
int option_on = 1;
int ret;
struct sockaddr_in* servaddr4 = NULL;
#if HAVE_INET6
struct sockaddr_in6* servaddr6 = NULL;
#endif
socklen_t addrlen;
if (NULL == (daemon = malloc (sizeof (struct SPDY_Daemon))))
{
SPDYF_DEBUG("malloc");
return NULL;
}
memset (daemon, 0, sizeof (struct SPDY_Daemon));
daemon->socket_fd = -1;
daemon->port = port;
if(SPDY_YES != spdyf_parse_options_va (daemon, valist))
{
SPDYF_DEBUG("parse");
goto free_and_fail;
}
if(0 == daemon->max_num_frames)
daemon->max_num_frames = SPDYF_NUM_SENT_FRAMES_AT_ONCE;
if(!port && NULL == daemon->address)
{
SPDYF_DEBUG("Port is 0");
goto free_and_fail;
}
if(0 == daemon->io_subsystem)
daemon->io_subsystem = SPDY_IO_SUBSYSTEM_OPENSSL;
if(SPDY_YES != SPDYF_io_set_daemon(daemon, daemon->io_subsystem))
goto free_and_fail;
if(SPDY_IO_SUBSYSTEM_RAW != daemon->io_subsystem)
{
if (NULL == certfile
|| NULL == (daemon->certfile = strdup (certfile)))
{
SPDYF_DEBUG("strdup (certfile)");
goto free_and_fail;
}
if (NULL == keyfile
|| NULL == (daemon->keyfile = strdup (keyfile)))
{
SPDYF_DEBUG("strdup (keyfile)");
goto free_and_fail;
}
}
daemon->new_session_cb = nscb;
daemon->session_closed_cb = sccb;
daemon->new_request_cb = nrcb;
daemon->new_post_data_cb = npdcb;
daemon->cls = cls;
daemon->fcls = fcls;
daemon->fnew_stream_cb = fnscb;
#if HAVE_INET6
//handling IPv6
if((daemon->flags & SPDY_DAEMON_FLAG_ONLY_IPV6)
&& NULL != daemon->address && AF_INET6 != daemon->address->sa_family)
{
SPDYF_DEBUG("SPDY_DAEMON_FLAG_ONLY_IPV6 set but IPv4 address provided");
goto free_and_fail;
}
addrlen = sizeof (struct sockaddr_in6);
if(NULL == daemon->address)
{
if (NULL == (servaddr6 = malloc (addrlen)))
{
SPDYF_DEBUG("malloc");
goto free_and_fail;
}
memset (servaddr6, 0, addrlen);
servaddr6->sin6_family = AF_INET6;
servaddr6->sin6_addr = in6addr_any;
servaddr6->sin6_port = htons (port);
daemon->address = (struct sockaddr *) servaddr6;
}
if(AF_INET6 == daemon->address->sa_family)
{
afamily = PF_INET6;
}
else
{
afamily = PF_INET;
}
#else
//handling IPv4
if(daemon->flags & SPDY_DAEMON_FLAG_ONLY_IPV6)
{
SPDYF_DEBUG("SPDY_DAEMON_FLAG_ONLY_IPV6 set but no support");
goto free_and_fail;
}
addrlen = sizeof (struct sockaddr_in);
if(NULL == daemon->address)
{
if (NULL == (servaddr4 = malloc (addrlen)))
{
SPDYF_DEBUG("malloc");
goto free_and_fail;
}
memset (servaddr4, 0, addrlen);
servaddr4->sin_family = AF_INET;
servaddr4->sin_addr = INADDR_ANY;
servaddr4->sin_port = htons (port);
daemon->address = (struct sockaddr *) servaddr4;
}
afamily = PF_INET;
#endif
daemon->socket_fd = socket (afamily, SOCK_STREAM, 0);
if (-1 == daemon->socket_fd)
{
SPDYF_DEBUG("sock");
goto free_and_fail;
}
//setting option for the socket to reuse address
ret = setsockopt(daemon->socket_fd, SOL_SOCKET, SO_REUSEADDR, &option_on, sizeof(option_on));
if(ret)
{
SPDYF_DEBUG("WARNING: SO_REUSEADDR was not set for the server");
}
#if HAVE_INET6
if(daemon->flags & SPDY_DAEMON_FLAG_ONLY_IPV6)
{
ret = setsockopt(daemon->socket_fd, IPPROTO_IPV6, IPV6_V6ONLY, &option_on, sizeof(option_on));
if(ret)
{
SPDYF_DEBUG("setsockopt with IPPROTO_IPV6 failed");
goto free_and_fail;
}
}
#endif
if (-1 == bind (daemon->socket_fd, daemon->address, addrlen))
{
SPDYF_DEBUG("bind %i",errno);
goto free_and_fail;
}
if (listen (daemon->socket_fd, 20) < 0)
{
SPDYF_DEBUG("listen %i",errno);
goto free_and_fail;
}
if(SPDY_YES != daemon->fio_init(daemon))
{
SPDYF_DEBUG("tls");
goto free_and_fail;
}
return daemon;
//for GOTO
free_and_fail:
if(daemon->socket_fd > 0)
(void)close (daemon->socket_fd);
free(servaddr4);
#if HAVE_INET6
free(servaddr6);
#endif
if(NULL != daemon->certfile)
free(daemon->certfile);
if(NULL != daemon->keyfile)
free(daemon->keyfile);
free (daemon);
return NULL;
}
void
SPDYF_stop_daemon (struct SPDY_Daemon *daemon)
{
daemon->fio_deinit(daemon);
shutdown (daemon->socket_fd, SHUT_RDWR);
spdyf_close_all_sessions (daemon);
(void)close (daemon->socket_fd);
if(!(SPDY_DAEMON_OPTION_SOCK_ADDR & daemon->options))
free(daemon->address);
free(daemon->certfile);
free(daemon->keyfile);
free(daemon);
}
int
SPDYF_get_timeout (struct SPDY_Daemon *daemon,
unsigned long long *timeout)
{
unsigned long long earliest_deadline = 0;
unsigned long long now;
struct SPDY_Session *pos;
bool have_timeout;
if(0 == daemon->session_timeout)
return SPDY_NO;
now = SPDYF_monotonic_time();
have_timeout = false;
for (pos = daemon->sessions_head; NULL != pos; pos = pos->next)
{
if ( (! have_timeout) ||
(earliest_deadline > pos->last_activity + daemon->session_timeout) )
earliest_deadline = pos->last_activity + daemon->session_timeout;
have_timeout = true;
if (SPDY_YES == pos->fio_is_pending(pos))
{
earliest_deadline = 0;
break;
}
}
if (!have_timeout)
return SPDY_NO;
if (earliest_deadline <= now)
*timeout = 0;
else
*timeout = earliest_deadline - now;
return SPDY_YES;
}
int
SPDYF_get_fdset (struct SPDY_Daemon *daemon,
fd_set *read_fd_set,
fd_set *write_fd_set,
fd_set *except_fd_set,
bool all)
{
(void)except_fd_set;
struct SPDY_Session *pos;
int fd;
int max_fd = -1;
fd = daemon->socket_fd;
if (-1 != fd)
{
FD_SET (fd, read_fd_set);
/* update max file descriptor */
max_fd = fd;
}
for (pos = daemon->sessions_head; NULL != pos; pos = pos->next)
{
fd = pos->socket_fd;
FD_SET(fd, read_fd_set);
if (all
|| (NULL != pos->response_queue_head) //frames pending
|| (NULL != pos->write_buffer) //part of last frame pending
|| (SPDY_SESSION_STATUS_CLOSING == pos->status) //the session is about to be closed
|| (daemon->session_timeout //timeout passed for the session
&& (pos->last_activity + daemon->session_timeout < SPDYF_monotonic_time()))
|| (SPDY_YES == pos->fio_is_pending(pos)) //data in TLS' read buffer pending
|| ((pos->read_buffer_offset - pos->read_buffer_beginning) > 0) // data in lib's read buffer pending
)
FD_SET(fd, write_fd_set);
if(fd > max_fd)
max_fd = fd;
}
return max_fd;
}
void
SPDYF_run (struct SPDY_Daemon *daemon)
{
struct SPDY_Session *pos;
struct SPDY_Session *next;
int num_ready;
fd_set rs;
fd_set ws;
fd_set es;
int max;
struct timeval timeout;
int ds;
timeout.tv_sec = 0;
timeout.tv_usec = 0;
FD_ZERO (&rs);
FD_ZERO (&ws);
FD_ZERO (&es);
//here we need really all descriptors to see later which are ready
max = SPDYF_get_fdset(daemon,&rs,&ws,&es, true);
num_ready = select (max + 1, &rs, &ws, &es, &timeout);
if(num_ready < 1)
return;
if ( (-1 != (ds = daemon->socket_fd)) &&
(FD_ISSET (ds, &rs)) ){
SPDYF_session_accept(daemon);
}
next = daemon->sessions_head;
while (NULL != (pos = next))
{
next = pos->next;
ds = pos->socket_fd;
if (ds != -1)
{
//fill the read buffer
if (FD_ISSET (ds, &rs) || pos->fio_is_pending(pos)){
SPDYF_session_read(pos);
}
//do something with the data in read buffer
if(SPDY_NO == SPDYF_session_idle(pos))
{
//the session was closed, cannot write anymore
//continue;
}
//write whatever has been put to the response queue
//during read or idle operation, something might be put
//on the response queue, thus call write operation
if (FD_ISSET (ds, &ws)){
if(SPDY_NO == SPDYF_session_write(pos, false))
{
//SPDYF_session_close(pos);
//continue;
}
}
/* the response queue has been flushed for half closed
* connections, so let close them */
/*if(pos->read_closed)
{
SPDYF_session_close(pos);
}*/
}
}
spdyf_cleanup_sessions(daemon);
}
|