-
Notifications
You must be signed in to change notification settings - Fork 81
/
Copy paththttpd.c
2181 lines (1977 loc) · 55.4 KB
/
thttpd.c
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
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* thttpd.c - tiny/turbo/throttling HTTP server
**
** Copyright © 1995,1998,1999,2000,2001,2015 by
** Jef Poskanzer <[email protected]>. All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
*/
#include "config.h"
#include "version.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <errno.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <pwd.h>
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#ifdef TIME_WITH_SYS_TIME
#include <time.h>
#endif
#include <unistd.h>
#include "fdwatch.h"
#include "libhttpd.h"
#include "mmc.h"
#include "timers.h"
#include "match.h"
#ifndef SHUT_WR
#define SHUT_WR 1
#endif
#ifndef HAVE_INT64T
typedef long long int64_t;
#endif
static char* argv0;
static int debug;
static unsigned short port;
static char* dir;
static char* data_dir;
static int do_chroot, no_log, no_symlink_check, do_vhost, do_global_passwd;
static char* cgi_pattern;
static int cgi_limit;
static char* url_pattern;
static int no_empty_referrers;
static char* local_pattern;
static char* logfile;
static char* throttlefile;
static char* hostname;
static char* pidfile;
static char* user;
static char* charset;
static char* p3p;
static int max_age;
typedef struct {
char* pattern;
long max_limit, min_limit;
long rate;
off_t bytes_since_avg;
int num_sending;
} throttletab;
static throttletab* throttles;
static int numthrottles, maxthrottles;
#define THROTTLE_NOLIMIT -1
typedef struct {
int conn_state;
int next_free_connect;
httpd_conn* hc;
int tnums[MAXTHROTTLENUMS]; /* throttle indexes */
int numtnums;
long max_limit, min_limit;
time_t started_at, active_at;
Timer* wakeup_timer;
Timer* linger_timer;
long wouldblock_delay;
off_t bytes;
off_t end_byte_index;
off_t next_byte_index;
} connecttab;
static connecttab* connects;
static int num_connects, max_connects, first_free_connect;
static int httpd_conn_count;
/* The connection states. */
#define CNST_FREE 0
#define CNST_READING 1
#define CNST_SENDING 2
#define CNST_PAUSING 3
#define CNST_LINGERING 4
static httpd_server* hs = (httpd_server*) 0;
int terminate = 0;
time_t start_time, stats_time;
long stats_connections;
off_t stats_bytes;
int stats_simultaneous;
static volatile int got_hup, got_usr1, watchdog_flag;
/* Forwards. */
static void parse_args( int argc, char** argv );
static void usage( void );
static void read_config( char* filename );
static void value_required( char* name, char* value );
static void no_value_required( char* name, char* value );
static char* e_strdup( char* oldstr );
static void lookup_hostname( httpd_sockaddr* sa4P, size_t sa4_len, int* gotv4P, httpd_sockaddr* sa6P, size_t sa6_len, int* gotv6P );
static void read_throttlefile( char* tf );
static void shut_down( void );
static int handle_newconnect( struct timeval* tvP, int listen_fd );
static void handle_read( connecttab* c, struct timeval* tvP );
static void handle_send( connecttab* c, struct timeval* tvP );
static void handle_linger( connecttab* c, struct timeval* tvP );
static int check_throttles( connecttab* c );
static void clear_throttles( connecttab* c, struct timeval* tvP );
static void update_throttles( ClientData client_data, struct timeval* nowP );
static void finish_connection( connecttab* c, struct timeval* tvP );
static void clear_connection( connecttab* c, struct timeval* tvP );
static void really_clear_connection( connecttab* c, struct timeval* tvP );
static void idle( ClientData client_data, struct timeval* nowP );
static void wakeup_connection( ClientData client_data, struct timeval* nowP );
static void linger_clear_connection( ClientData client_data, struct timeval* nowP );
static void occasional( ClientData client_data, struct timeval* nowP );
#ifdef STATS_TIME
static void show_stats( ClientData client_data, struct timeval* nowP );
#endif /* STATS_TIME */
static void logstats( struct timeval* nowP );
static void thttpd_logstats( long secs );
/* SIGTERM and SIGINT say to exit immediately. */
static void
handle_term( int sig )
{
/* Don't need to set up the handler again, since it's a one-shot. */
shut_down();
syslog( LOG_NOTICE, "exiting due to signal %d", sig );
closelog();
exit( 1 );
}
/* SIGCHLD - a chile process exitted, so we need to reap the zombie */
static void
handle_chld( int sig )
{
const int oerrno = errno;
pid_t pid;
int status;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGCHLD, handle_chld );
#endif /* ! HAVE_SIGSET */
/* Reap defunct children until there aren't any more. */
for (;;)
{
#ifdef HAVE_WAITPID
pid = waitpid( (pid_t) -1, &status, WNOHANG );
#else /* HAVE_WAITPID */
pid = wait3( &status, WNOHANG, (struct rusage*) 0 );
#endif /* HAVE_WAITPID */
if ( (int) pid == 0 ) /* none left */
break;
if ( (int) pid < 0 )
{
if ( errno == EINTR || errno == EAGAIN )
continue;
/* ECHILD shouldn't happen with the WNOHANG option,
** but with some kernels it does anyway. Ignore it.
*/
if ( errno != ECHILD )
syslog( LOG_ERR, "child wait - %m" );
break;
}
/* Decrement the CGI count. Note that this is not accurate, since
** each CGI can involve two or even three child processes.
** Decrementing for each child means that when there is heavy CGI
** activity, the count will be lower than it should be, and therefore
** more CGIs will be allowed than should be.
*/
if ( hs != (httpd_server*) 0 )
{
--hs->cgi_count;
if ( hs->cgi_count < 0 )
hs->cgi_count = 0;
}
}
/* Restore previous errno. */
errno = oerrno;
}
/* SIGHUP says to re-open the log file. */
static void
handle_hup( int sig )
{
const int oerrno = errno;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGHUP, handle_hup );
#endif /* ! HAVE_SIGSET */
/* Just set a flag that we got the signal. */
got_hup = 1;
/* Restore previous errno. */
errno = oerrno;
}
/* SIGUSR1 says to exit as soon as all current connections are done. */
static void
handle_usr1( int sig )
{
/* Don't need to set up the handler again, since it's a one-shot. */
if ( num_connects == 0 )
{
/* If there are no active connections we want to exit immediately
** here. Not only is it faster, but without any connections the
** main loop won't wake up until the next new connection.
*/
shut_down();
syslog( LOG_NOTICE, "exiting" );
closelog();
exit( 0 );
}
/* Otherwise, just set a flag that we got the signal. */
got_usr1 = 1;
/* Don't need to restore old errno, since we didn't do any syscalls. */
}
/* SIGUSR2 says to generate the stats syslogs immediately. */
static void
handle_usr2( int sig )
{
const int oerrno = errno;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGUSR2, handle_usr2 );
#endif /* ! HAVE_SIGSET */
logstats( (struct timeval*) 0 );
/* Restore previous errno. */
errno = oerrno;
}
/* SIGALRM is used as a watchdog. */
static void
handle_alrm( int sig )
{
const int oerrno = errno;
/* If nothing has been happening */
if ( ! watchdog_flag )
{
/* Try changing dirs to someplace we can write. */
(void) chdir( "/tmp" );
/* Dump core. */
abort();
}
watchdog_flag = 0;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGALRM, handle_alrm );
#endif /* ! HAVE_SIGSET */
/* Set up alarm again. */
(void) alarm( OCCASIONAL_TIME * 3 );
/* Restore previous errno. */
errno = oerrno;
}
static void
re_open_logfile( void )
{
FILE* logfp;
if ( no_log || hs == (httpd_server*) 0 )
return;
/* Re-open the log file. */
if ( logfile != (char*) 0 && strcmp( logfile, "-" ) != 0 )
{
syslog( LOG_NOTICE, "re-opening logfile" );
logfp = fopen( logfile, "a" );
if ( logfp == (FILE*) 0 )
{
syslog( LOG_CRIT, "re-opening %.80s - %m", logfile );
return;
}
(void) fcntl( fileno( logfp ), F_SETFD, 1 );
httpd_set_logfp( hs, logfp );
}
}
int
main( int argc, char** argv )
{
char* cp;
struct passwd* pwd;
uid_t uid = 32767;
gid_t gid = 32767;
char cwd[MAXPATHLEN+1];
FILE* logfp;
int num_ready;
int cnum;
connecttab* c;
httpd_conn* hc;
httpd_sockaddr sa4;
httpd_sockaddr sa6;
int gotv4, gotv6;
struct timeval tv;
argv0 = argv[0];
cp = strrchr( argv0, '/' );
if ( cp != (char*) 0 )
++cp;
else
cp = argv0;
openlog( cp, LOG_NDELAY|LOG_PID, LOG_FACILITY );
/* Handle command-line arguments. */
parse_args( argc, argv );
/* Read zone info now, in case we chroot(). */
tzset();
/* Look up hostname now, in case we chroot(). */
lookup_hostname( &sa4, sizeof(sa4), &gotv4, &sa6, sizeof(sa6), &gotv6 );
if ( ! ( gotv4 || gotv6 ) )
{
syslog( LOG_ERR, "can't find any valid address" );
(void) fprintf( stderr, "%s: can't find any valid address\n", argv0 );
exit( 1 );
}
/* Throttle file. */
numthrottles = 0;
maxthrottles = 0;
throttles = (throttletab*) 0;
if ( throttlefile != (char*) 0 )
read_throttlefile( throttlefile );
/* If we're root and we're going to become another user, get the uid/gid
** now.
*/
if ( getuid() == 0 )
{
pwd = getpwnam( user );
if ( pwd == (struct passwd*) 0 )
{
syslog( LOG_CRIT, "unknown user - '%.80s'", user );
(void) fprintf( stderr, "%s: unknown user - '%s'\n", argv0, user );
exit( 1 );
}
uid = pwd->pw_uid;
gid = pwd->pw_gid;
}
/* Log file. */
if ( logfile != (char*) 0 )
{
if ( strcmp( logfile, "/dev/null" ) == 0 )
{
no_log = 1;
logfp = (FILE*) 0;
}
else if ( strcmp( logfile, "-" ) == 0 )
logfp = stdout;
else
{
logfp = fopen( logfile, "a" );
if ( logfp == (FILE*) 0 )
{
syslog( LOG_CRIT, "%.80s - %m", logfile );
perror( logfile );
exit( 1 );
}
if ( logfile[0] != '/' )
{
syslog( LOG_WARNING, "logfile is not an absolute path, you may not be able to re-open it" );
(void) fprintf( stderr, "%s: logfile is not an absolute path, you may not be able to re-open it\n", argv0 );
}
(void) fcntl( fileno( logfp ), F_SETFD, 1 );
if ( getuid() == 0 )
{
/* If we are root then we chown the log file to the user we'll
** be switching to.
*/
if ( fchown( fileno( logfp ), uid, gid ) < 0 )
{
syslog( LOG_WARNING, "fchown logfile - %m" );
perror( "fchown logfile" );
}
}
}
}
else
logfp = (FILE*) 0;
/* Switch directories if requested. */
if ( dir != (char*) 0 )
{
if ( chdir( dir ) < 0 )
{
syslog( LOG_CRIT, "chdir - %m" );
perror( "chdir" );
exit( 1 );
}
}
#ifdef USE_USER_DIR
else if ( getuid() == 0 )
{
/* No explicit directory was specified, we're root, and the
** USE_USER_DIR option is set - switch to the specified user's
** home dir.
*/
if ( chdir( pwd->pw_dir ) < 0 )
{
syslog( LOG_CRIT, "chdir - %m" );
perror( "chdir" );
exit( 1 );
}
}
#endif /* USE_USER_DIR */
/* Get current directory. */
(void) getcwd( cwd, sizeof(cwd) - 1 );
if ( cwd[strlen( cwd ) - 1] != '/' )
(void) strcat( cwd, "/" );
if ( ! debug )
{
/* We're not going to use stdin stdout or stderr from here on, so close
** them to save file descriptors.
*/
(void) fclose( stdin );
if ( logfp != stdout )
(void) fclose( stdout );
(void) fclose( stderr );
/* Daemonize - make ourselves a subprocess. */
#ifdef HAVE_DAEMON
if ( daemon( 1, 1 ) < 0 )
{
syslog( LOG_CRIT, "daemon - %m" );
exit( 1 );
}
#else /* HAVE_DAEMON */
switch ( fork() )
{
case 0:
break;
case -1:
syslog( LOG_CRIT, "fork - %m" );
exit( 1 );
default:
exit( 0 );
}
#ifdef HAVE_SETSID
(void) setsid();
#endif /* HAVE_SETSID */
#endif /* HAVE_DAEMON */
}
else
{
/* Even if we don't daemonize, we still want to disown our parent
** process.
*/
#ifdef HAVE_SETSID
(void) setsid();
#endif /* HAVE_SETSID */
}
if ( pidfile != (char*) 0 )
{
/* Write the PID file. */
FILE* pidfp = fopen( pidfile, "w" );
if ( pidfp == (FILE*) 0 )
{
syslog( LOG_CRIT, "%.80s - %m", pidfile );
exit( 1 );
}
(void) fprintf( pidfp, "%d\n", (int) getpid() );
(void) fclose( pidfp );
}
/* Initialize the fdwatch package. Have to do this before chroot,
** if /dev/poll is used.
*/
max_connects = fdwatch_get_nfiles();
if ( max_connects < 0 )
{
syslog( LOG_CRIT, "fdwatch initialization failure" );
exit( 1 );
}
max_connects -= SPARE_FDS;
/* Chroot if requested. */
if ( do_chroot )
{
if ( chroot( cwd ) < 0 )
{
syslog( LOG_CRIT, "chroot - %m" );
perror( "chroot" );
exit( 1 );
}
/* If we're logging and the logfile's pathname begins with the
** chroot tree's pathname, then elide the chroot pathname so
** that the logfile pathname still works from inside the chroot
** tree.
*/
if ( logfile != (char*) 0 && strcmp( logfile, "-" ) != 0 )
{
if ( strncmp( logfile, cwd, strlen( cwd ) ) == 0 )
{
(void) ol_strcpy( logfile, &logfile[strlen( cwd ) - 1] );
/* (We already guaranteed that cwd ends with a slash, so leaving
** that slash in logfile makes it an absolute pathname within
** the chroot tree.)
*/
}
else
{
syslog( LOG_WARNING, "logfile is not within the chroot tree, you will not be able to re-open it" );
(void) fprintf( stderr, "%s: logfile is not within the chroot tree, you will not be able to re-open it\n", argv0 );
}
}
(void) strcpy( cwd, "/" );
/* Always chdir to / after a chroot. */
if ( chdir( cwd ) < 0 )
{
syslog( LOG_CRIT, "chroot chdir - %m" );
perror( "chroot chdir" );
exit( 1 );
}
}
/* Switch directories again if requested. */
if ( data_dir != (char*) 0 )
{
if ( chdir( data_dir ) < 0 )
{
syslog( LOG_CRIT, "data_dir chdir - %m" );
perror( "data_dir chdir" );
exit( 1 );
}
}
/* Set up to catch signals. */
#ifdef HAVE_SIGSET
(void) sigset( SIGTERM, handle_term );
(void) sigset( SIGINT, handle_term );
(void) sigset( SIGCHLD, handle_chld );
(void) sigset( SIGPIPE, SIG_IGN ); /* get EPIPE instead */
(void) sigset( SIGHUP, handle_hup );
(void) sigset( SIGUSR1, handle_usr1 );
(void) sigset( SIGUSR2, handle_usr2 );
(void) sigset( SIGALRM, handle_alrm );
#else /* HAVE_SIGSET */
(void) signal( SIGTERM, handle_term );
(void) signal( SIGINT, handle_term );
(void) signal( SIGCHLD, handle_chld );
(void) signal( SIGPIPE, SIG_IGN ); /* get EPIPE instead */
(void) signal( SIGHUP, handle_hup );
(void) signal( SIGUSR1, handle_usr1 );
(void) signal( SIGUSR2, handle_usr2 );
(void) signal( SIGALRM, handle_alrm );
#endif /* HAVE_SIGSET */
got_hup = 0;
got_usr1 = 0;
watchdog_flag = 0;
(void) alarm( OCCASIONAL_TIME * 3 );
/* Initialize the timer package. */
tmr_init();
/* Initialize the HTTP layer. Got to do this before giving up root,
** so that we can bind to a privileged port.
*/
hs = httpd_initialize(
hostname,
gotv4 ? &sa4 : (httpd_sockaddr*) 0, gotv6 ? &sa6 : (httpd_sockaddr*) 0,
port, cgi_pattern, cgi_limit, charset, p3p, max_age, cwd, no_log, logfp,
no_symlink_check, do_vhost, do_global_passwd, url_pattern,
local_pattern, no_empty_referrers );
if ( hs == (httpd_server*) 0 )
exit( 1 );
/* Set up the occasional timer. */
if ( tmr_create( (struct timeval*) 0, occasional, JunkClientData, OCCASIONAL_TIME * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(occasional) failed" );
exit( 1 );
}
/* Set up the idle timer. */
if ( tmr_create( (struct timeval*) 0, idle, JunkClientData, 5 * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(idle) failed" );
exit( 1 );
}
if ( numthrottles > 0 )
{
/* Set up the throttles timer. */
if ( tmr_create( (struct timeval*) 0, update_throttles, JunkClientData, THROTTLE_TIME * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(update_throttles) failed" );
exit( 1 );
}
}
#ifdef STATS_TIME
/* Set up the stats timer. */
if ( tmr_create( (struct timeval*) 0, show_stats, JunkClientData, STATS_TIME * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(show_stats) failed" );
exit( 1 );
}
#endif /* STATS_TIME */
start_time = stats_time = time( (time_t*) 0 );
stats_connections = 0;
stats_bytes = 0;
stats_simultaneous = 0;
/* If we're root, try to become someone else. */
if ( getuid() == 0 )
{
/* Set aux groups to null. */
if ( setgroups( 0, (const gid_t*) 0 ) < 0 )
{
syslog( LOG_CRIT, "setgroups - %m" );
exit( 1 );
}
/* Set primary group. */
if ( setgid( gid ) < 0 )
{
syslog( LOG_CRIT, "setgid - %m" );
exit( 1 );
}
/* Try setting aux groups correctly - not critical if this fails. */
if ( initgroups( user, gid ) < 0 )
syslog( LOG_WARNING, "initgroups - %m" );
#ifdef HAVE_SETLOGIN
/* Set login name. */
(void) setlogin( user );
#endif /* HAVE_SETLOGIN */
/* Set uid. */
if ( setuid( uid ) < 0 )
{
syslog( LOG_CRIT, "setuid - %m" );
exit( 1 );
}
/* Check for unnecessary security exposure. */
if ( ! do_chroot )
syslog(
LOG_WARNING,
"started as root without requesting chroot(), warning only" );
}
/* Initialize our connections table. */
connects = NEW( connecttab, max_connects );
if ( connects == (connecttab*) 0 )
{
syslog( LOG_CRIT, "out of memory allocating a connecttab" );
exit( 1 );
}
for ( cnum = 0; cnum < max_connects; ++cnum )
{
connects[cnum].conn_state = CNST_FREE;
connects[cnum].next_free_connect = cnum + 1;
connects[cnum].hc = (httpd_conn*) 0;
}
connects[max_connects - 1].next_free_connect = -1; /* end of link list */
first_free_connect = 0;
num_connects = 0;
httpd_conn_count = 0;
if ( hs != (httpd_server*) 0 )
{
if ( hs->listen4_fd != -1 )
fdwatch_add_fd( hs->listen4_fd, (void*) 0, FDW_READ );
if ( hs->listen6_fd != -1 )
fdwatch_add_fd( hs->listen6_fd, (void*) 0, FDW_READ );
}
/* Main loop. */
(void) gettimeofday( &tv, (struct timezone*) 0 );
while ( ( ! terminate ) || num_connects > 0 )
{
/* Do we need to re-open the log file? */
if ( got_hup )
{
re_open_logfile();
got_hup = 0;
}
/* Do the fd watch. */
num_ready = fdwatch( tmr_mstimeout( &tv ) );
if ( num_ready < 0 )
{
if ( errno == EINTR || errno == EAGAIN )
continue; /* try again */
syslog( LOG_ERR, "fdwatch - %m" );
exit( 1 );
}
(void) gettimeofday( &tv, (struct timezone*) 0 );
if ( num_ready == 0 )
{
/* No fd's are ready - run the timers. */
tmr_run( &tv );
continue;
}
/* Is it a new connection? */
if ( hs != (httpd_server*) 0 && hs->listen6_fd != -1 &&
fdwatch_check_fd( hs->listen6_fd ) )
{
if ( handle_newconnect( &tv, hs->listen6_fd ) )
/* Go around the loop and do another fdwatch, rather than
** dropping through and processing existing connections.
** New connections always get priority.
*/
continue;
}
if ( hs != (httpd_server*) 0 && hs->listen4_fd != -1 &&
fdwatch_check_fd( hs->listen4_fd ) )
{
if ( handle_newconnect( &tv, hs->listen4_fd ) )
/* Go around the loop and do another fdwatch, rather than
** dropping through and processing existing connections.
** New connections always get priority.
*/
continue;
}
/* Find the connections that need servicing. */
while ( ( c = (connecttab*) fdwatch_get_next_client_data() ) != (connecttab*) -1 )
{
if ( c == (connecttab*) 0 )
continue;
hc = c->hc;
if ( ! fdwatch_check_fd( hc->conn_fd ) )
/* Something went wrong. */
clear_connection( c, &tv );
else
switch ( c->conn_state )
{
case CNST_READING: handle_read( c, &tv ); break;
case CNST_SENDING: handle_send( c, &tv ); break;
case CNST_LINGERING: handle_linger( c, &tv ); break;
}
}
tmr_run( &tv );
if ( got_usr1 && ! terminate )
{
terminate = 1;
if ( hs != (httpd_server*) 0 )
{
if ( hs->listen4_fd != -1 )
fdwatch_del_fd( hs->listen4_fd );
if ( hs->listen6_fd != -1 )
fdwatch_del_fd( hs->listen6_fd );
httpd_unlisten( hs );
}
}
}
/* The main loop terminated. */
shut_down();
syslog( LOG_NOTICE, "exiting" );
closelog();
exit( 0 );
}
static void
parse_args( int argc, char** argv )
{
int argn;
debug = 0;
port = DEFAULT_PORT;
dir = (char*) 0;
data_dir = (char*) 0;
#ifdef ALWAYS_CHROOT
do_chroot = 1;
#else /* ALWAYS_CHROOT */
do_chroot = 0;
#endif /* ALWAYS_CHROOT */
no_log = 0;
no_symlink_check = do_chroot;
#ifdef ALWAYS_VHOST
do_vhost = 1;
#else /* ALWAYS_VHOST */
do_vhost = 0;
#endif /* ALWAYS_VHOST */
#ifdef ALWAYS_GLOBAL_PASSWD
do_global_passwd = 1;
#else /* ALWAYS_GLOBAL_PASSWD */
do_global_passwd = 0;
#endif /* ALWAYS_GLOBAL_PASSWD */
#ifdef CGI_PATTERN
cgi_pattern = CGI_PATTERN;
#else /* CGI_PATTERN */
cgi_pattern = (char*) 0;
#endif /* CGI_PATTERN */
#ifdef CGI_LIMIT
cgi_limit = CGI_LIMIT;
#else /* CGI_LIMIT */
cgi_limit = 0;
#endif /* CGI_LIMIT */
url_pattern = (char*) 0;
no_empty_referrers = 0;
local_pattern = (char*) 0;
throttlefile = (char*) 0;
hostname = (char*) 0;
logfile = (char*) 0;
pidfile = (char*) 0;
user = DEFAULT_USER;
charset = DEFAULT_CHARSET;
p3p = "";
max_age = -1;
argn = 1;
while ( argn < argc && argv[argn][0] == '-' )
{
if ( strcmp( argv[argn], "-V" ) == 0 )
{
(void) printf( "%s\n", SERVER_SOFTWARE );
exit( 0 );
}
else if ( strcmp( argv[argn], "-C" ) == 0 && argn + 1 < argc )
{
++argn;
read_config( argv[argn] );
}
else if ( strcmp( argv[argn], "-p" ) == 0 && argn + 1 < argc )
{
++argn;
port = (unsigned short) atoi( argv[argn] );
}
else if ( strcmp( argv[argn], "-d" ) == 0 && argn + 1 < argc )
{
++argn;
dir = argv[argn];
}
else if ( strcmp( argv[argn], "-r" ) == 0 )
{
do_chroot = 1;
no_symlink_check = 1;
}
else if ( strcmp( argv[argn], "-nor" ) == 0 )
{
do_chroot = 0;
no_symlink_check = 0;
}
else if ( strcmp( argv[argn], "-dd" ) == 0 && argn + 1 < argc )
{
++argn;
data_dir = argv[argn];
}
else if ( strcmp( argv[argn], "-s" ) == 0 )
no_symlink_check = 0;
else if ( strcmp( argv[argn], "-nos" ) == 0 )
no_symlink_check = 1;
else if ( strcmp( argv[argn], "-u" ) == 0 && argn + 1 < argc )
{
++argn;
user = argv[argn];
}
else if ( strcmp( argv[argn], "-c" ) == 0 && argn + 1 < argc )
{
++argn;
cgi_pattern = argv[argn];
}
else if ( strcmp( argv[argn], "-t" ) == 0 && argn + 1 < argc )
{
++argn;
throttlefile = argv[argn];
}
else if ( strcmp( argv[argn], "-h" ) == 0 && argn + 1 < argc )
{
++argn;
hostname = argv[argn];
}
else if ( strcmp( argv[argn], "-l" ) == 0 && argn + 1 < argc )
{
++argn;
logfile = argv[argn];
}
else if ( strcmp( argv[argn], "-v" ) == 0 )
do_vhost = 1;
else if ( strcmp( argv[argn], "-nov" ) == 0 )
do_vhost = 0;
else if ( strcmp( argv[argn], "-g" ) == 0 )
do_global_passwd = 1;
else if ( strcmp( argv[argn], "-nog" ) == 0 )
do_global_passwd = 0;
else if ( strcmp( argv[argn], "-i" ) == 0 && argn + 1 < argc )
{
++argn;
pidfile = argv[argn];
}
else if ( strcmp( argv[argn], "-T" ) == 0 && argn + 1 < argc )
{
++argn;
charset = argv[argn];
}
else if ( strcmp( argv[argn], "-P" ) == 0 && argn + 1 < argc )
{
++argn;
p3p = argv[argn];
}
else if ( strcmp( argv[argn], "-M" ) == 0 && argn + 1 < argc )
{
++argn;
max_age = atoi( argv[argn] );
}
else if ( strcmp( argv[argn], "-D" ) == 0 )
debug = 1;
else
usage();
++argn;
}
if ( argn != argc )
usage();
}
static void
usage( void )
{
(void) fprintf( stderr,
"usage: %s [-C configfile] [-p port] [-d dir] [-r|-nor] [-dd data_dir] [-s|-nos] [-v|-nov] [-g|-nog] [-u user] [-c cgipat] [-t throttles] [-h host] [-l logfile] [-i pidfile] [-T charset] [-P P3P] [-M maxage] [-V] [-D]\n",
argv0 );
exit( 1 );
}
static void
read_config( char* filename )