-
Notifications
You must be signed in to change notification settings - Fork 54
/
seeks.cpp
658 lines (605 loc) · 21.1 KB
/
seeks.cpp
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
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
/**
* The seeks proxy is part of the SEEKS project
* It is based on Privoxy (http://www.privoxy.org), developed
* by the Privoxy team.
*
* Copyright (C) 2009, 2010 Emmanuel Benazera, ebenazer@seeks-project.info
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mem_utils.h"
#include "seeks_proxy.h"
#include "proxy_configuration.h"
#include "errlog.h"
#include "miscutil.h"
#include "cgi.h"
#include "spsockets.h"
#include "plugin_manager.h"
#include "iso639.h"
#include "user_db_fix.h"
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <signal.h>
#include <iostream>
using namespace sp;
/********************************************************************
*
* Function : main
*
* Description : Load the config file and start the listen loop.
* This function is a lot more *sane* with the load_config'
* and listen_loop' functions; although it stills does
* a *little* too much for my taste.
*
* Parameters :
* 1 : argc = Number of parameters (including $0).
* 2 : argv = Array of (char *)'s to the parameters.
*
* Returns : 1 if : can't open config file, unrecognized directive,
* stats requested in multi-thread mode, can't open the
* log file, can't open the jar file, listen port is invalid,
* any load fails, and can't bind port.
*
* Else main never returns, the process must be signaled
* to terminate execution. Or, on Windows, use the
* "File", "Exit" menu option.
*
*********************************************************************/
#ifdef __MINGW32__
int real_main(int argc, const char *argv[])
#else
int main(int argc, const char *argv[])
#endif
{
int argc_pos = 0;
unsigned int random_seed;
#ifdef unix
struct passwd *pw = NULL;
struct group *grp = NULL;
char *p;
int do_chroot = 0;
char *pre_chroot_nslookup_to_load_resolver = NULL;
#endif
seeks_proxy::_Argc = argc;
seeks_proxy::_Argv = argv;
#ifdef SEEKS_CONFIGDIR
seeks_proxy::_lshconfigfile = SEEKS_CONFIGDIR "/lsh-config";
#else
seeks_proxy::_lshconfigfile = "lsh-config";
#endif
seeks_proxy::_configfile =
#ifdef SEEKS_CONFIGDIR
SEEKS_CONFIGDIR "/"
#endif
#if !defined(_WIN32)
"config"
#else
"config.txt"
#endif
;
/* Prepare mutexes if supported and necessary. */
seeks_proxy::initialize_mutexes();
/* Enable logging until further notice. */
errlog::init_log_module();
errlog::set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
/*
* Parse the command line arguments
*/
while (++argc_pos < argc)
{
#ifdef _WIN32
/* Check to see if the service must be installed or uninstalled */
if (strncmp(argv[argc_pos], "--install", 9) == 0)
{
const char *pName = argv[argc_pos] + 9;
if (*pName == ':')
pName++;
exit( (install_service(pName)) ? 0 : 1 );
}
else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
{
const char *pName = argv[argc_pos] + 11;
if (*pName == ':')
pName++;
exit((uninstall_service(pName)) ? 0 : 1);
}
else if (strcmp(argv[argc_pos], "--service" ) == 0)
{
bRunAsService = TRUE;
w32_set_service_cwd();
atexit(w32_service_exit_notify);
}
else
#endif /* defined(_WIN32) */
#if !defined(_WIN32) || defined(_WIN_CONSOLE)
if (strcmp(argv[argc_pos], "--help") == 0)
{
seeks_proxy::usage(argv[0]);
}
else if (strcmp(argv[argc_pos], "--version") == 0)
{
printf("Seeks version " VERSION " (" HOME_PAGE_URL ")\n");
exit(0);
}
# if defined(unix)
else if (strcmp(argv[argc_pos], "--daemon" ) == 0)
{
//errlog::set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
seeks_proxy::_no_daemon = 0;
}
else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
{
if (++argc_pos == argc) seeks_proxy::usage(argv[0]);
seeks_proxy::_pidfile = strdup(argv[argc_pos]);
}
else if (strcmp(argv[argc_pos], "--user" ) == 0)
{
if (++argc_pos == argc) seeks_proxy::usage(argv[argc_pos]);
if ((NULL != (p = strchr((char*)argv[argc_pos], '.'))) && *(p + 1) != '0')
{
*p++ = '\0';
if (NULL == (grp = getgrnam(p)))
{
errlog::log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
}
}
if (NULL == (pw = getpwnam(argv[argc_pos])))
{
errlog::log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
}
if (p != NULL) *--p = '\0';
}
else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
{
if (++argc_pos == argc) seeks_proxy::usage(argv[0]);
pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
}
else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
{
do_chroot = 1;
}
# endif /* defined(unix) */
else if (strcmp(argv[argc_pos], "--plugin-repository") == 0)
{
if (++argc_pos == argc) seeks_proxy::usage(argv[0]);
plugin_manager::_plugin_repository = std::string(argv[argc_pos]);
}
else if (strcmp(argv[argc_pos], "--data-repository") == 0)
{
if (++argc_pos == argc) seeks_proxy::usage(argv[0]);
seeks_proxy::_datadir = std::string(argv[argc_pos]);
}
else if (argc_pos + 1 != argc)
{
/*
* This is neither the last command line
* option, nor was it recognized before,
* therefore it must be invalid.
*/
seeks_proxy::usage(argv[0]);
}
else
#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
{
seeks_proxy::_configfile = argv[argc_pos];
}
} /* -END- while (more arguments) */
errlog::show_version(seeks_proxy::_Argv[0]);
#if defined(unix)
char cwd[BUFFER_SIZE];
if (NULL == getcwd(cwd, sizeof(cwd)))
{
perror("failed to get current working directory");
exit( 1 );
}
struct stat stFileInfo;
if ( stat("seeks.cpp", &stFileInfo) == 0 && stat("config", &stFileInfo) == 0)
{
/* force directory source */
if (seeks_proxy::_datadir.empty())
{
seeks_proxy::_datadir = std::string(cwd);
seeks_proxy::_datadir += "/";
}
if (plugin_manager::_plugin_repository.empty())
{
plugin_manager::_plugin_repository = std::string(cwd);
plugin_manager::_plugin_repository += "/plugins/";
}
seeks_proxy::_lshconfigfile = "lsh/lsh-config";
seeks_proxy::_configfile = "config";
}
if (*seeks_proxy::_configfile.c_str() != '/' )
{
/* make config-filename absolute here */
char *abs_file;
size_t abs_file_size;
/* XXX: why + 5? */
abs_file_size = strlen(cwd) + seeks_proxy::_configfile.length() + 5;
if (!seeks_proxy::_basedir)
seeks_proxy::_basedir = strdup(cwd);
if (NULL == seeks_proxy::_basedir ||
NULL == (abs_file = (char*) zalloc(abs_file_size)))
{
perror("malloc failed");
exit( 1 );
}
strlcpy(abs_file, seeks_proxy::_basedir, abs_file_size);
strlcat(abs_file, "/", abs_file_size );
strlcat(abs_file, seeks_proxy::_configfile.c_str(), abs_file_size);
seeks_proxy::_configfile = std::string(abs_file);
freez(abs_file);
}
if (*seeks_proxy::_lshconfigfile.c_str() != '/' )
{
/* make config-filename absolute here */
char *abs_file;
size_t abs_file_size;
abs_file_size = strlen(cwd) + seeks_proxy::_lshconfigfile.length() + 9;
if (!seeks_proxy::_basedir)
seeks_proxy::_basedir = strdup(cwd);
if (NULL == seeks_proxy::_basedir ||
NULL == (abs_file = (char*) zalloc(abs_file_size)))
{
perror("malloc failed");
exit( 1 );
}
strlcpy(abs_file, seeks_proxy::_basedir, abs_file_size);
strlcat(abs_file, "/", abs_file_size );
strlcat(abs_file, seeks_proxy::_lshconfigfile.c_str(), abs_file_size);
seeks_proxy::_lshconfigfile = std::string(abs_file);
freez(abs_file);
}
#endif /* defined unix */
seeks_proxy::_clients._next = NULL;
#if defined(_WIN32)
InitWin32();
#endif
random_seed = (unsigned int)time(NULL);
#ifdef HAVE_RANDOM
srandom(random_seed);
#else
srand(random_seed);
#endif /* ifdef HAVE_RANDOM */
/**
* Unix signal handling
*
* Catch the abort, interrupt and terminate signals for a graceful exit
* Catch the hangup signal so the errlog can be reopened.
* Ignore the broken pipe signals (FIXME: Why?)
*/
#if !defined(_WIN32)
{
int idx;
const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
const int ignored_signals[] = { SIGPIPE, 0 };
for (idx = 0; catched_signals[idx] != 0; idx++)
{
# ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
if (sigset(catched_signals[idx], &seek_proxy::sig_handler) == SIG_ERR)
# else
if (signal(catched_signals[idx], &seeks_proxy::sig_handler) == SIG_ERR)
# endif /* ifdef sun */
{
errlog::log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
}
}
for (idx = 0; ignored_signals[idx] != 0; idx++)
{
if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
{
errlog::log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
}
}
}
#else /* ifdef _WIN32 */
# ifdef _WIN_CONSOLE
/*
* We *are* in a windows console app.
* Print a verbose messages about FAQ's and such
*/
printf("%s", win32_blurb);
# endif /* def _WIN_CONSOLE */
#endif /* def _WIN32 */
/* Initialize the CGI subsystem */
cgi::cgi_init_error_messages();
/*
*
* If runnig on unix and without the --nodaemon
* option, become a daemon. I.e. fork, detach
* from tty and get process group leadership
*/
#if defined(unix)
{
pid_t pid = 0;
# if 0
int fd;
# endif
if (!seeks_proxy::_no_daemon)
{
pid = fork();
if ( pid < 0 ) /* error */
{
perror("fork");
exit( 3 );
}
else if ( pid != 0 ) /* parent */
{
int status;
pid_t wpid;
/*
* must check for errors
* child died due to missing files aso
*/
sleep( 1 );
wpid = waitpid( pid, &status, WNOHANG );
if ( wpid != 0 )
{
exit( 1 );
}
exit( 0 );
}
/* child */
# if 1
/* Should be more portable, but not as well tested */
setsid();
# else /* !1 */
# ifdef __FreeBSD__
setpgrp(0,0);
# else /* ndef __FreeBSD__ */
setpgrp();
# endif /* ndef __FreeBSD__ */
fd = open("/dev/tty", O_RDONLY);
if ( fd )
{
/* no error check here */
ioctl( fd, TIOCNOTTY,0 );
close ( fd );
}
# endif /* 1 */
/*
* stderr (fd 2) will be closed later on,
* when the config file has been parsed.
*/
close( 0 );
close( 1 );
chdir("/");
}
/* -END- if (!no_daemon) */
/*
* As soon as we have written the PID file, we can switch
* to the user and group ID indicated by the --user option
*/
seeks_proxy::write_pid_file();
if (NULL != pw)
{
if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
}
if (NULL != grp)
{
if (setgroups(1, &grp->gr_gid))
{
errlog::log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
}
}
else if (initgroups(pw->pw_name, pw->pw_gid))
{
errlog::log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
}
if (do_chroot)
{
if (!pw->pw_dir)
{
errlog::log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
}
/* Read the time zone file from /etc before doing chroot. */
tzset();
if (NULL != pre_chroot_nslookup_to_load_resolver
&& '\0' != pre_chroot_nslookup_to_load_resolver[0])
{
/* Initialize resolver library. */ // TODO.
(void) spsockets::resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
}
if (chroot(pw->pw_dir) < 0)
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
}
if (chdir ("/"))
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
}
}
if (setuid(pw->pw_uid))
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
}
if (do_chroot)
{
char putenv_dummy[64];
strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
if (putenv(putenv_dummy) != 0)
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
}
snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
if (putenv(putenv_dummy) != 0)
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
}
}
}
else if (do_chroot)
{
errlog::log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
}
}
#endif /* defined unix */
#ifdef _WIN32
/* This will be FALSE unless the command line specified --service */
if (bRunAsService)
{
/* Yup, so now we must attempt to establish a connection
* with the service dispatcher. This will only work if this
* process was launched by the service control manager to
* actually run as a service. If this isn't the case, i've
* known it take around 30 seconds or so for the call to return.
*/
/* The StartServiceCtrlDispatcher won't return until the service is stopping */
if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
{
/* Service has run, and at this point is now being stopped, so just return */
return 0;
}
# ifdef _WIN_CONSOLE
printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
# endif
/* An error occurred. Usually it's because --service was wrongly specified
* and we were unable to connect to the Service Control Dispatcher because
* it wasn't expecting us and is therefore not listening.
*
* For now, just continue below to call the listen_loop function.
*/
}
#endif /* def _WIN32 */
// loads main configuration file (seeks + proxy configuration).
if (seeks_proxy::_config)
delete seeks_proxy::_config;
seeks_proxy::_config = new proxy_configuration(seeks_proxy::_configfile);
errlog::log_error(LOG_LEVEL_INFO,"seeks proxy configuration successfully loaded");
if (seeks_proxy::_lsh_config)
delete seeks_proxy::_lsh_config;
seeks_proxy::_lsh_config = new lsh_configuration(seeks_proxy::_lshconfigfile);
errlog::log_error(LOG_LEVEL_INFO,"lsh configuration successfully loaded");
// loads iso639 table.
iso639::initialize();
#if defined(PROTOBUF) && (defined(TC) || defined(TT))
// start user db before plugins so they can work with it.
if (seeks_proxy::_config->_user_db_haddr != NULL)
seeks_proxy::_user_db = new user_db(false);
else seeks_proxy::_user_db = new user_db(true,"","",-1,"","",
seeks_proxy::_config->_user_db_bnum,
seeks_proxy::_config->_user_db_large);
if (seeks_proxy::_user_db->open_db())
{
// error opening the db.
// check whether this is a remote db. If it is, try the local
// db instead.
if (seeks_proxy::_user_db->is_remote())
{
errlog::log_error(LOG_LEVEL_INFO,"Trying the local user db instead of the remote db");
delete seeks_proxy::_user_db;
seeks_proxy::_user_db = new user_db(true,"","",-1,"","",
seeks_proxy::_config->_user_db_bnum,
seeks_proxy::_config->_user_db_large);
seeks_proxy::_user_db->open_db();
}
}
if (seeks_proxy::_config->_user_db_optimize
&& seeks_proxy::_user_db->number_records() > 1)
seeks_proxy::_user_db->optimize_db();
#endif
// loads plugins.
errlog::log_error(LOG_LEVEL_INFO,"listen_loop(): attempt to find plugins...");
plugin_manager::load_all_plugins();
// instanciates plugins.
// XXX: here come checks on plugin dependent operations:
// - default policy is: if the HTTP server plugin is activated, proxy doest not run.
// (this default behavior can be overriden by setting the automatic-proxy-disable
// option to 0).
if (seeks_proxy::_config->is_plugin_activated("httpserv")
&& seeks_proxy::_config->_automatic_proxy_disable)
{
errlog::log_error(LOG_LEVEL_INFO,"Disabling Seeks' proxy since it appears the HTTP server plugin is running on this node. This default behavior can be overriden by setting the 'automatic-proxy-disable' option to 0.");
seeks_proxy::_run_proxy = false;
}
plugin_manager::start_plugins();
#if defined(PROTOBUF) && (defined(TC) || defined(TT))
// fix broken user DB by detecting and rewriting it.
double db_version = seeks_proxy::_user_db->get_version();
errlog::log_error(LOG_LEVEL_INFO, "db version: %g", db_version);
int ferr = 0;
if (seeks_proxy::_user_db->number_records() > 1
&& (db_version < 0.6 && !miscutil::compare_d(db_version,user_db::_db_version,1e-3)))
{
if (miscutil::compare_d(0.0,db_version,1e-3) && sizeof(unsigned long) == 8)
{
if (!seeks_proxy::_user_db->is_remote())
{
seeks_proxy::_user_db->close_db();
ferr = user_db_fix::fix_issue_169();
seeks_proxy::_user_db->open_db();
}
else errlog::log_error(LOG_LEVEL_ERROR, "cannot apply fix 169 to remote database, skipping");
}
if (db_version < 0.3 && !miscutil::compare_d(0.3,db_version,1e-3))
{
seeks_proxy::_user_db->close_db();
ferr = user_db_fix::fix_issue_263();
seeks_proxy::_user_db->open_db();
}
if (db_version < 0.4 && !miscutil::compare_d(0.4,db_version,1e-3))
{
seeks_proxy::_user_db->close_db();
ferr = user_db_fix::fix_issue_281();
seeks_proxy::_user_db->open_db();
}
if (db_version < 0.5 && !miscutil::compare_d(0.5,db_version,1e-3))
{
if (!seeks_proxy::_user_db->is_remote())
{
seeks_proxy::_user_db->close_db();
ferr = user_db_fix::fix_issue_154();
seeks_proxy::_user_db->open_db();
}
else errlog::log_error(LOG_LEVEL_INFO, "cannot apply fix 154 to remote database, skipping");
}
if (db_version < 0.6 && !miscutil::compare_d(0.6,db_version,1e-3))
{
if (!seeks_proxy::_user_db->is_remote())
{
seeks_proxy::_user_db->close_db();
ferr = user_db_fix::fix_issue_575();
seeks_proxy::_user_db->open_db();
}
else errlog::log_error(LOG_LEVEL_INFO, "cannot apply fix 575 to remote database, skipping");
}
}
if (ferr == 0 && !miscutil::compare_d(db_version,user_db::_db_version,1e-3))
{
seeks_proxy::_user_db->set_version(user_db::_db_version);
errlog::log_error(LOG_LEVEL_INFO, "user db version updated to %g",
user_db::_db_version);
}
#endif
// start proxy.
if (seeks_proxy::_run_proxy)
seeks_proxy::listen_loop();
else
{
if (!seeks_proxy::_httpserv_thread)
{
errlog::log_error(LOG_LEVEL_FATAL,"Can't find HTTP server thread.");
}
pthread_join(*seeks_proxy::_httpserv_thread,NULL);
}
/* NOTREACHED */
return(-1);
}