-
Notifications
You must be signed in to change notification settings - Fork 7.8k
/
Copy pathlsapilib.c
4368 lines (3807 loc) · 117 KB
/
lsapilib.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
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: George Wang <[email protected]> |
+----------------------------------------------------------------------+
*/
/*
Copyright (c) 2002-2018, Lite Speed Technologies Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* 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.
* Neither the name of the Lite Speed Technologies Inc nor the
names of its contributors may be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
OWNER 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 <ctype.h>
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#include <sched.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <grp.h>
#include <pwd.h>
#include <time.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/un.h>
#include <php_config.h>
#include "lsapilib.h"
#ifdef HAVE_PRCTL
#include <sys/prctl.h>
#endif
#if defined(__FreeBSD__ ) || defined(__NetBSD__) || defined(__OpenBSD__) \
|| defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
#include <sys/sysctl.h>
#endif
#include <inttypes.h>
#ifndef uint32
#define uint32 uint32_t
#endif
#include <Zend/zend_portability.h>
struct lsapi_MD5Context {
uint32 buf[4];
uint32 bits[2];
unsigned char in[64];
};
void lsapi_MD5Init(struct lsapi_MD5Context *context);
void lsapi_MD5Update(struct lsapi_MD5Context *context, unsigned char const *buf,
unsigned len);
void lsapi_MD5Final(unsigned char digest[16], struct lsapi_MD5Context *context);
/*
* This is needed to make RSAREF happy on some MS-DOS compilers.
*/
typedef struct lsapi_MD5Context lsapi_MD5_CTX;
#define LSAPI_ST_REQ_HEADER 1
#define LSAPI_ST_REQ_BODY 2
#define LSAPI_ST_RESP_HEADER 4
#define LSAPI_ST_RESP_BODY 8
#define LSAPI_ST_BACKGROUND 16
#define LSAPI_RESP_BUF_SIZE 8192
#define LSAPI_INIT_RESP_HEADER_LEN 4096
enum
{
LSAPI_STATE_IDLE,
LSAPI_STATE_CONNECTED,
LSAPI_STATE_ACCEPTING,
};
typedef struct lsapi_child_status
{
int m_pid;
long m_tmStart;
volatile short m_iKillSent;
volatile char m_inProcess;
volatile char m_state;
volatile int m_iReqCounter;
volatile long m_tmWaitBegin;
volatile long m_tmReqBegin;
volatile long m_tmLastCheckPoint;
}
lsapi_child_status;
static lsapi_child_status * s_worker_status = NULL;
static int g_inited = 0;
static int g_running = 1;
static int s_ppid;
static int s_restored_ppid = 0;
static int s_pid = 0;
static int s_slow_req_msecs = 0;
static int s_keep_listener = 1;
static int s_dump_debug_info = 0;
static int s_pid_dump_debug_info = 0;
static int s_req_processed = 0;
static int s_skip_write = 0;
static int (*pthread_atfork_func)(void (*prepare)(void), void (*parent)(void),
void (*child)(void)) = NULL;
static int *s_busy_workers = NULL;
static int *s_accepting_workers = NULL;
static int *s_global_counter = &s_req_processed;
static int s_max_busy_workers = -1;
static char *s_stderr_log_path = NULL;
static int s_stderr_is_pipe = 0;
static int s_ignore_pid = -1;
static size_t s_total_pages = 1;
static size_t s_min_avail_pages = 256 * 1024;
static size_t *s_avail_pages = &s_total_pages;
LSAPI_Request g_req =
{ .m_fdListen = -1, .m_fd = -1 };
static char s_secret[24];
static LSAPI_On_Timer_pf s_proc_group_timer_cb = NULL;
void Flush_RespBuf_r( LSAPI_Request * pReq );
static int lsapi_reopen_stderr(const char *p);
static const char *CGI_HEADERS[H_TRANSFER_ENCODING+1] =
{
"HTTP_ACCEPT", "HTTP_ACCEPT_CHARSET",
"HTTP_ACCEPT_ENCODING",
"HTTP_ACCEPT_LANGUAGE", "HTTP_AUTHORIZATION",
"HTTP_CONNECTION", "CONTENT_TYPE",
"CONTENT_LENGTH", "HTTP_COOKIE", "HTTP_COOKIE2",
"HTTP_HOST", "HTTP_PRAGMA",
"HTTP_REFERER", "HTTP_USER_AGENT",
"HTTP_CACHE_CONTROL",
"HTTP_IF_MODIFIED_SINCE", "HTTP_IF_MATCH",
"HTTP_IF_NONE_MATCH",
"HTTP_IF_RANGE",
"HTTP_IF_UNMODIFIED_SINCE",
"HTTP_KEEP_ALIVE",
"HTTP_RANGE",
"HTTP_X_FORWARDED_FOR",
"HTTP_VIA",
"HTTP_TRANSFER_ENCODING"
};
static int CGI_HEADER_LEN[H_TRANSFER_ENCODING+1] =
{ 11, 19, 20, 20, 18, 15, 12, 14, 11, 12, 9, 11, 12, 15, 18,
22, 13, 18, 13, 24, 15, 10, 20, 8, 22 };
static const char *HTTP_HEADERS[H_TRANSFER_ENCODING+1] =
{
"Accept", "Accept-Charset",
"Accept-Encoding",
"Accept-Language", "Authorization",
"Connection", "Content-Type",
"Content-Length", "Cookie", "Cookie2",
"Host", "Pragma",
"Referer", "User-Agent",
"Cache-Control",
"If-Modified-Since", "If-Match",
"If-None-Match",
"If-Range",
"If-Unmodified-Since",
"Keep-Alive",
"Range",
"X-Forwarded-For",
"Via",
"Transfer-Encoding"
};
static int HTTP_HEADER_LEN[H_TRANSFER_ENCODING+1] =
{ 6, 14, 15, 15, 13, 10, 12, 14, 6, 7, 4, 6, 7, 10, //user-agent
13,17, 8, 13, 8, 19, 10, 5, 15, 3, 17
};
static const char *s_log_level_names[8] =
{
"", "DEBUG","INFO", "NOTICE", "WARN", "ERROR", "CRIT", "FATAL"
};
void LSAPI_Log(int flag, const char * fmt, ...)
{
char buf[1024];
char *p = buf;
if ((flag & LSAPI_LOG_TIMESTAMP_BITS)
&& !(s_stderr_is_pipe))
{
struct timeval tv;
struct tm tm;
gettimeofday(&tv, NULL);
localtime_r(&tv.tv_sec, &tm);
if (flag & LSAPI_LOG_TIMESTAMP_FULL)
{
p += snprintf(p, 1024, "%04d-%02d-%02d %02d:%02d:%02d.%06d ",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, (int)tv.tv_usec);
}
else if (flag & LSAPI_LOG_TIMESTAMP_HMS)
{
p += snprintf(p, 1024, "%02d:%02d:%02d ",
tm.tm_hour, tm.tm_min, tm.tm_sec);
}
}
int level = flag & LSAPI_LOG_LEVEL_BITS;
if (level && level <= LSAPI_LOG_FLAG_FATAL)
{
p += snprintf(p, 100, "[%s] ", s_log_level_names[level]);
}
if (flag & LSAPI_LOG_PID)
{
p += snprintf(p, 100, "[UID:%d][%d] ", getuid(), s_pid);
}
if (p > buf)
fprintf(stderr, "%.*s", (int)(p - buf), buf);
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
#ifdef LSAPI_DEBUG
#define DBGLOG_FLAG (LSAPI_LOG_TIMESTAMP_FULL|LSAPI_LOG_FLAG_DEBUG|LSAPI_LOG_PID)
#define lsapi_dbg(...) LSAPI_Log(DBGLOG_FLAG, __VA_ARGS__)
#else
#define lsapi_dbg(...)
#endif
#define lsapi_log(...) LSAPI_Log(LSAPI_LOG_TIMESTAMP_FULL|LSAPI_LOG_PID, __VA_ARGS__)
void lsapi_perror(const char * pMessage, int err_no)
{
lsapi_log("%s, errno: %d (%s)\n", pMessage, err_no, strerror(err_no));
}
static int lsapi_parent_dead(void)
{
// Return non-zero if the parent is dead. 0 if still alive.
if (!s_ppid) {
// not checking, so not dead
return(0);
}
if (s_restored_ppid) {
if (kill(s_restored_ppid,0) == -1) {
if (errno == EPERM) {
return(0); // no permission, but it's still there.
}
return(1); // Dead
}
return(0); // it worked, so it's not dead
}
return(s_ppid != getppid());
}
static void lsapi_sigpipe( int sig )
{
}
static void lsapi_siguser1( int sig )
{
g_running = 0;
}
#ifndef sighandler_t
typedef void (*sighandler_t)(int);
#endif
static void lsapi_signal(int signo, sighandler_t handler)
{
struct sigaction sa;
sigaction(signo, NULL, &sa);
if (sa.sa_handler == SIG_DFL)
{
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = handler;
sigaction(signo, &sa, NULL);
}
}
static int s_enable_core_dump = 0;
static void lsapi_enable_core_dump(void)
{
#if defined(__FreeBSD__ ) || defined(__NetBSD__) || defined(__OpenBSD__) \
|| defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
int mib[2];
size_t len;
#if !defined(__OpenBSD__)
len = 2;
if ( sysctlnametomib("kern.sugid_coredump", mib, &len) == 0 )
{
len = sizeof(s_enable_core_dump);
if (sysctl(mib, 2, NULL, 0, &s_enable_core_dump, len) == -1)
perror( "sysctl: Failed to set 'kern.sugid_coredump', "
"core dump may not be available!");
}
#else
int set = 3;
len = sizeof(set);
mib[0] = CTL_KERN;
mib[1] = KERN_NOSUIDCOREDUMP;
if (sysctl(mib, 2, NULL, 0, &set, len) == 0) {
s_enable_core_dump = 1;
}
#endif
#endif
#ifdef HAVE_PRCTL
if (prctl(PR_SET_DUMPABLE, s_enable_core_dump,0,0,0) == -1)
perror( "prctl: Failed to set dumpable, "
"core dump may not be available!");
#endif
}
static inline void lsapi_buildPacketHeader( struct lsapi_packet_header * pHeader,
char type, int len )
{
pHeader->m_versionB0 = LSAPI_VERSION_B0; /* LSAPI protocol version */
pHeader->m_versionB1 = LSAPI_VERSION_B1;
pHeader->m_type = type;
pHeader->m_flag = LSAPI_ENDIAN;
pHeader->m_packetLen.m_iLen = len;
}
static int lsapi_set_nblock( int fd, int nonblock )
{
int val = fcntl( fd, F_GETFL, 0 );
if ( nonblock )
{
if (!( val & O_NONBLOCK ))
{
return fcntl( fd, F_SETFL, val | O_NONBLOCK );
}
}
else
{
if ( val & O_NONBLOCK )
{
return fcntl( fd, F_SETFL, val &(~O_NONBLOCK) );
}
}
return 0;
}
static int lsapi_close( int fd )
{
int ret;
while( 1 )
{
ret = close( fd );
if (( ret == -1 )&&( errno == EINTR )&&(g_running))
continue;
return ret;
}
}
static void lsapi_close_connection(LSAPI_Request *pReq)
{
if (pReq->m_fd == -1)
return;
lsapi_close(pReq->m_fd);
pReq->m_fd = -1;
if (s_busy_workers)
__atomic_fetch_sub(s_busy_workers, 1, __ATOMIC_SEQ_CST);
if (s_worker_status)
__atomic_store_n(&s_worker_status->m_state, LSAPI_STATE_IDLE,
__ATOMIC_SEQ_CST);
}
static inline ssize_t lsapi_read( int fd, void * pBuf, size_t len )
{
ssize_t ret;
while( 1 )
{
ret = read( fd, (char *)pBuf, len );
if (( ret == -1 )&&( errno == EINTR )&&(g_running))
continue;
return ret;
}
}
/*
static int lsapi_write( int fd, const void * pBuf, int len )
{
int ret;
const char * pCur;
const char * pEnd;
if ( len == 0 )
return 0;
pCur = (const char *)pBuf;
pEnd = pCur + len;
while( g_running && (pCur < pEnd) )
{
ret = write( fd, pCur, pEnd - pCur );
if ( ret >= 0)
pCur += ret;
else if (( ret == -1 )&&( errno != EINTR ))
return ret;
}
return pCur - (const char *)pBuf;
}
*/
static int lsapi_writev( int fd, struct iovec ** pVec, int count, int totalLen )
{
int ret;
int left = totalLen;
int n = count;
if (s_skip_write)
return totalLen;
while(( left > 0 )&&g_running )
{
ret = writev( fd, *pVec, n );
if ( ret > 0 )
{
left -= ret;
if (( left <= 0)||( !g_running ))
return totalLen - left;
while( ret > 0 )
{
if ( (*pVec)->iov_len <= (unsigned int )ret )
{
ret -= (*pVec)->iov_len;
++(*pVec);
}
else
{
(*pVec)->iov_base = (char *)(*pVec)->iov_base + ret;
(*pVec)->iov_len -= ret;
break;
}
}
}
else if ( ret == -1 )
{
if ( errno == EAGAIN )
{
if ( totalLen - left > 0 )
return totalLen - left;
else
return -1;
}
else if ( errno != EINTR )
return ret;
}
}
return totalLen - left;
}
/*
static int getTotalLen( struct iovec * pVec, int count )
{
struct iovec * pEnd = pVec + count;
int total = 0;
while( pVec < pEnd )
{
total += pVec->iov_len;
++pVec;
}
return total;
}
*/
static inline int allocateBuf( LSAPI_Request * pReq, int size )
{
char * pBuf = (char *)realloc( pReq->m_pReqBuf, size );
if ( pBuf )
{
pReq->m_pReqBuf = pBuf;
pReq->m_reqBufSize = size;
pReq->m_pHeader = (struct lsapi_req_header *)pReq->m_pReqBuf;
return 0;
}
return -1;
}
static int allocateIovec( LSAPI_Request * pReq, int n )
{
struct iovec * p = (struct iovec *)realloc(
pReq->m_pIovec, sizeof(struct iovec) * n );
if ( !p )
return -1;
pReq->m_pIovecToWrite = p + ( pReq->m_pIovecToWrite - pReq->m_pIovec );
pReq->m_pIovecCur = p + ( pReq->m_pIovecCur - pReq->m_pIovec );
pReq->m_pIovec = p;
pReq->m_pIovecEnd = p + n;
return 0;
}
static int allocateRespHeaderBuf( LSAPI_Request * pReq, int size )
{
char * p = (char *)realloc( pReq->m_pRespHeaderBuf, size );
if ( !p )
return -1;
pReq->m_pRespHeaderBufPos = p + ( pReq->m_pRespHeaderBufPos - pReq->m_pRespHeaderBuf );
pReq->m_pRespHeaderBuf = p;
pReq->m_pRespHeaderBufEnd = p + size;
return 0;
}
static inline int verifyHeader( struct lsapi_packet_header * pHeader, char pktType )
{
if (( LSAPI_VERSION_B0 != pHeader->m_versionB0 )||
( LSAPI_VERSION_B1 != pHeader->m_versionB1 )||
( pktType != pHeader->m_type ))
return -1;
if ( LSAPI_ENDIAN != (pHeader->m_flag & LSAPI_ENDIAN_BIT ))
{
register char b;
b = pHeader->m_packetLen.m_bytes[0];
pHeader->m_packetLen.m_bytes[0] = pHeader->m_packetLen.m_bytes[3];
pHeader->m_packetLen.m_bytes[3] = b;
b = pHeader->m_packetLen.m_bytes[1];
pHeader->m_packetLen.m_bytes[1] = pHeader->m_packetLen.m_bytes[2];
pHeader->m_packetLen.m_bytes[2] = b;
}
return pHeader->m_packetLen.m_iLen;
}
static int allocateEnvList( struct LSAPI_key_value_pair ** pEnvList,
int *curSize, int newSize )
{
struct LSAPI_key_value_pair * pBuf;
if ( *curSize >= newSize )
return 0;
if ( newSize > 8192 )
return -1;
pBuf = (struct LSAPI_key_value_pair *)realloc( *pEnvList, newSize *
sizeof(struct LSAPI_key_value_pair) );
if ( pBuf )
{
*pEnvList = pBuf;
*curSize = newSize;
return 0;
}
else
return -1;
}
static inline int isPipe( int fd )
{
char achPeer[128];
socklen_t len = 128;
if (( getpeername( fd, (struct sockaddr *)achPeer, &len ) != 0 )&&
( errno == ENOTCONN ))
return 0;
else
return 1;
}
static int parseEnv( struct LSAPI_key_value_pair * pEnvList, int count,
char **pBegin, char * pEnd )
{
struct LSAPI_key_value_pair * pEnvEnd;
int keyLen = 0, valLen = 0;
if ( count > 8192 )
return -1;
pEnvEnd = pEnvList + count;
while( pEnvList != pEnvEnd )
{
if ( pEnd - *pBegin < 4 )
return -1;
keyLen = *((unsigned char *)((*pBegin)++));
keyLen = (keyLen << 8) + *((unsigned char *)((*pBegin)++));
valLen = *((unsigned char *)((*pBegin)++));
valLen = (valLen << 8) + *((unsigned char *)((*pBegin)++));
if ( *pBegin + keyLen + valLen > pEnd )
return -1;
if (( !keyLen )||( !valLen ))
return -1;
pEnvList->pKey = *pBegin;
*pBegin += keyLen;
pEnvList->pValue = *pBegin;
*pBegin += valLen;
pEnvList->keyLen = keyLen - 1;
pEnvList->valLen = valLen - 1;
++pEnvList;
}
if ( memcmp( *pBegin, "\0\0\0\0", 4 ) != 0 )
return -1;
*pBegin += 4;
return 0;
}
static inline void swapIntEndian( int * pInteger )
{
char * p = (char *)pInteger;
register char b;
b = p[0];
p[0] = p[3];
p[3] = b;
b = p[1];
p[1] = p[2];
p[2] = b;
}
static inline void fixEndian( LSAPI_Request * pReq )
{
struct lsapi_req_header *p= pReq->m_pHeader;
swapIntEndian( &p->m_httpHeaderLen );
swapIntEndian( &p->m_reqBodyLen );
swapIntEndian( &p->m_scriptFileOff );
swapIntEndian( &p->m_scriptNameOff );
swapIntEndian( &p->m_queryStringOff );
swapIntEndian( &p->m_requestMethodOff );
swapIntEndian( &p->m_cntUnknownHeaders );
swapIntEndian( &p->m_cntEnv );
swapIntEndian( &p->m_cntSpecialEnv );
}
static void fixHeaderIndexEndian( LSAPI_Request * pReq )
{
int i;
for( i = 0; i < H_TRANSFER_ENCODING; ++i )
{
if ( pReq->m_pHeaderIndex->m_headerOff[i] )
{
register char b;
char * p = (char *)(&pReq->m_pHeaderIndex->m_headerLen[i]);
b = p[0];
p[0] = p[1];
p[1] = b;
swapIntEndian( &pReq->m_pHeaderIndex->m_headerOff[i] );
}
}
if ( pReq->m_pHeader->m_cntUnknownHeaders > 0 )
{
struct lsapi_header_offset * pCur, *pEnd;
pCur = pReq->m_pUnknownHeader;
pEnd = pCur + pReq->m_pHeader->m_cntUnknownHeaders;
while( pCur < pEnd )
{
swapIntEndian( &pCur->nameOff );
swapIntEndian( &pCur->nameLen );
swapIntEndian( &pCur->valueOff );
swapIntEndian( &pCur->valueLen );
++pCur;
}
}
}
static int validateHeaders( LSAPI_Request * pReq )
{
int totalLen = pReq->m_pHeader->m_httpHeaderLen;
int i;
for(i = 0; i < H_TRANSFER_ENCODING; ++i)
{
if ( pReq->m_pHeaderIndex->m_headerOff[i] )
{
if (pReq->m_pHeaderIndex->m_headerOff[i] > totalLen
|| pReq->m_pHeaderIndex->m_headerLen[i]
+ pReq->m_pHeaderIndex->m_headerOff[i] > totalLen)
return -1;
}
}
if (pReq->m_pHeader->m_cntUnknownHeaders > 0)
{
struct lsapi_header_offset * pCur, *pEnd;
pCur = pReq->m_pUnknownHeader;
pEnd = pCur + pReq->m_pHeader->m_cntUnknownHeaders;
while( pCur < pEnd )
{
if (pCur->nameOff > totalLen
|| pCur->nameOff + pCur->nameLen > totalLen
|| pCur->valueOff > totalLen
|| pCur->valueOff + pCur->valueLen > totalLen)
return -1;
++pCur;
}
}
return 0;
}
static uid_t s_uid = 0;
static uid_t s_defaultUid; //web server need set this
static gid_t s_defaultGid;
#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__gnu_linux__)
#define LSAPI_LVE_DISABLED 0
#define LSAPI_LVE_ENABLED 1
#define LSAPI_CAGEFS_ENABLED 2
#define LSAPI_CAGEFS_NO_SUEXEC 3
struct liblve;
static int s_enable_lve = LSAPI_LVE_DISABLED;
static struct liblve * s_lve = NULL;
static void *s_liblve;
static int (*fp_lve_is_available)(void) = NULL;
static int (*fp_lve_instance_init)(struct liblve *) = NULL;
static int (*fp_lve_destroy)(struct liblve *) = NULL;
static int (*fp_lve_enter)(struct liblve *, uint32_t, int32_t, int32_t, uint32_t *) = NULL;
static int (*fp_lve_leave)(struct liblve *, uint32_t *) = NULL;
static int (*fp_lve_jail)( struct passwd *, char *) = NULL;
static int lsapi_load_lve_lib(void)
{
s_liblve = DL_LOAD("liblve.so.0");
if (s_liblve)
{
fp_lve_is_available = dlsym(s_liblve, "lve_is_available");
if (dlerror() == NULL)
{
if ( !(*fp_lve_is_available)() )
{
int uid = getuid();
if ( uid )
{
if (setreuid( s_uid, uid )) {};
if ( !(*fp_lve_is_available)() )
s_enable_lve = 0;
if (setreuid( uid, s_uid )) {};
}
}
}
}
else
{
s_enable_lve = LSAPI_LVE_DISABLED;
}
return (s_liblve)? 0 : -1;
}
static int init_lve_ex(void)
{
int rc;
if ( !s_liblve )
return -1;
fp_lve_instance_init = dlsym(s_liblve, "lve_instance_init");
fp_lve_destroy = dlsym(s_liblve, "lve_destroy");
fp_lve_enter = dlsym(s_liblve, "lve_enter");
fp_lve_leave = dlsym(s_liblve, "lve_leave");
if ( s_enable_lve >= LSAPI_CAGEFS_ENABLED )
fp_lve_jail = dlsym(s_liblve, "jail" );
if ( s_lve == NULL )
{
rc = (*fp_lve_instance_init)(NULL);
s_lve = malloc(rc);
}
rc = (*fp_lve_instance_init)(s_lve);
if (rc != 0)
{
perror( "LSAPI: Unable to initialize LVE" );
free( s_lve );
s_lve = NULL;
return -1;
}
return 0;
}
#endif
static int readSecret( const char * pSecretFile )
{
struct stat st;
int fd = open( pSecretFile, O_RDONLY , 0600 );
if ( fd == -1 )
{
lsapi_log("LSAPI: failed to open secret file: %s!\n", pSecretFile );
return -1;
}
if ( fstat( fd, &st ) == -1 )
{
lsapi_log("LSAPI: failed to check state of file: %s!\n", pSecretFile );
close( fd );
return -1;
}
/*
if ( st.st_uid != s_uid )
{
lsapi_log("LSAPI: file owner check failure: %s!\n", pSecretFile );
close( fd );
return -1;
}
*/
if ( st.st_mode & 0077 )
{
lsapi_log("LSAPI: file permission check failure: %s\n", pSecretFile );
close( fd );
return -1;
}
if ( read( fd, s_secret, 16 ) < 16 )
{
lsapi_log("LSAPI: failed to read secret from secret file: %s\n", pSecretFile );
close( fd );
return -1;
}
close( fd );
return 0;
}
int LSAPI_is_suEXEC_Daemon(void)
{
if (( !s_uid )&&( s_secret[0] ))
return 1;
else
return 0;
}
static int LSAPI_perror_r( LSAPI_Request * pReq, const char * pErr1, const char *pErr2 )
{
char achError[4096];
int n = snprintf(achError, sizeof(achError), "[UID:%d][%d] %s:%s: %s\n",
getuid(), getpid(),
pErr1, (pErr2)?pErr2:"", strerror(errno));
if (n > (int)sizeof(achError))
n = sizeof(achError);
if ( pReq )
LSAPI_Write_Stderr_r( pReq, achError, n );
else
if (write( STDERR_FILENO, achError, n )) {};
return 0;
}
#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__gnu_linux__)
static int lsapi_lve_error( LSAPI_Request * pReq )
{
static const char * headers[] =
{
"Cache-Control: private, no-cache, no-store, must-revalidate, max-age=0",
"Pragma: no-cache",
"Retry-After: 60",
"Content-Type: text/html",
NULL
};
static const char achBody[] =
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
"<HTML><HEAD>\n<TITLE>508 Resource Limit Is Reached</TITLE>\n"
"</HEAD><BODY>\n" "<H1>Resource Limit Is Reached</H1>\n"
"The website is temporarily unable to service your request as it exceeded resource limit.\n"
"Please try again later.\n"
"<HR>\n"
"</BODY></HTML>\n";
LSAPI_ErrResponse_r( pReq, 508, headers, achBody, sizeof( achBody ) - 1 );
return 0;
}
static int lsapi_enterLVE( LSAPI_Request * pReq, uid_t uid )
{
if ( s_lve && uid ) //root user should not do that
{
uint32_t cookie;
int ret = -1;
ret = (*fp_lve_enter)(s_lve, uid, -1, -1, &cookie);
if ( ret < 0 )
{
//lsapi_log("enter LVE (%d) : result: %d !\n", uid, ret );
LSAPI_perror_r(pReq, "LSAPI: lve_enter() failure, reached resource limit.", NULL );
lsapi_lve_error( pReq );
return -1;
}
}
return 0;
}
static int lsapi_jailLVE( LSAPI_Request * pReq, uid_t uid, struct passwd * pw )
{
int ret = 0;
char error_msg[1024] = "";
ret = (*fp_lve_jail)( pw, error_msg );
if ( ret < 0 )
{
lsapi_log("LSAPI: LVE jail(%d) result: %d, error: %s !\n",
uid, ret, error_msg );
LSAPI_perror_r( pReq, "LSAPI: jail() failure.", NULL );
return -1;
}
return ret;
}
static int lsapi_initLVE(void)
{
const char * pEnv;
if ( (pEnv = getenv( "LSAPI_LVE_ENABLE" ))!= NULL )
{
s_enable_lve = atol( pEnv );
pEnv = NULL;
}
else if ( (pEnv = getenv( "LVE_ENABLE" ))!= NULL )
{
s_enable_lve = atol( pEnv );
pEnv = NULL;
}
if ( s_enable_lve && !s_uid )
{
lsapi_load_lve_lib();
if ( s_enable_lve )