summaryrefslogtreecommitdiff
path: root/networking/httpd.c
blob: fb37224cf882fa2006af0fa1e25c85481d71f612 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
/*
 * httpd implementation for busybox
 *
 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
 * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
 *
 * simplify patch stolen from libbb without using strdup
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *****************************************************************************
 *
 * Typical usage:
 *   for non root user
 * httpd -p 8080 -h $HOME/public_html
 *   or for daemon start from rc script with uid=0:
 * httpd -u www
 * This is equivalent if www user have uid=80 to
 * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
 *
 *
 * When a url contains "cgi-bin" it is assumed to be a cgi script.  The
 * server changes directory to the location of the script and executes it
 * after setting QUERY_STRING and other environment variables.  If url args
 * are included in the url or as a post, the args are placed into decoded
 * environment variables.  e.g. /cgi-bin/setup?foo=Hello%20World  will set
 * the $CGI_foo environment variable to "Hello World" while
 * CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV enabled.
 *
 * The server can also be invoked as a url arg decoder and html text encoder
 * as follows:
 *  foo=`httpd -d $foo`             # decode "Hello%20World" as "Hello World"
 *  bar=`httpd -e "<Hello World>"`  # encode as "%3CHello%20World%3E"
 *
 * httpd.conf has the following format:

A:172.20.         # Allow any address that begins with 172.20
A:10.10.          # Allow any address that begins with 10.10.
A:10.10           # Allow any address that previous set and 10.100-109.X.X
A:127.0.0.1       # Allow local loopback connections
D:*               # Deny from other IP connections
/cgi-bin:foo:bar  # Require user foo, pwd bar on urls starting with /cgi-bin/
/adm:admin:setup  # Require user admin, pwd setup on urls starting with /adm/
/adm:toor:PaSsWd  # or user toor, pwd PaSsWd on urls starting with /adm/
.au:audio/basic   # additional mime type for audio.au files

A shortes path and D:from[^*] automaticaly sorting to top.
All longest path can`t reset user:password if shorted protect setted.

A/D may be as a/d or allow/deny - first char case unsensitive parsed only.

Each subdir can have config file.
For protect as user:pass current subdir and subpathes set from subdir config:
/:user:pass
if not, other subpathes for give effect must have path from httpd root
/current_subdir_path_from_httpd_root/subpath:user:pass

The Deny/Allow IP logic:

	1. Allow all:
The config don`t set D: lines

	2. Allow from setted only:
see the begin format example

	3. Set deny, allow from other:
D:1.2.3.        # deny from 1.2.3.0 - 1.2.3.255
D:2.3.4.        # deny from 2.3.4.0 - 2.3.4.255
A:*             # allow from other, this line not strongly require

  A global and subdirs config merging logic:
allow rules reducing, deny lines strongled.
  The algorithm combinations:

	4. If current config have
A:from
D:*
  subdir config A: lines skiping, D:from - moving top

	5. If current config have
D:from
A:*
  result config:
D:from current
D:from subdir
A:from subdir
 and seting D:* if subdir config have this

 If -c don`t setted, used httpd root config, else httpd root config skiped.
 Exited with fault if can`t open start config.
 For set wide open server, use -c /dev/null ;=)
 */

#include <stdio.h>
#include <ctype.h>         /* for isspace           */
#include <string.h>
#include <stdlib.h>        /* for malloc            */
#include <time.h>
#include <unistd.h>        /* for close             */
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>    /* for connect and socket*/
#include <netinet/in.h>    /* for sockaddr_in       */
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>         /* for open modes        */
#include "busybox.h"


static const char httpdVersion[] = "busybox httpd/1.20 31-Jan-2003";
static const char default_patch_httpd_conf[] = "/etc";
static const char httpd_conf[] = "httpd.conf";
static const char home[] = "/www";

// Note: xfuncs are not used because we want the server to keep running
//       if something bad happens due to a malformed user request.
//       As a result, all memory allocation after daemonize
//       is checked rigorously

//#define DEBUG 1

/* Configure options, disabled by default as nonstandart httpd feature */
//#define CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
//#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
//#define CONFIG_FEATURE_HTTPD_DECODE_URL_STR

/* disabled as not necessary feature */
//#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
//#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
//#define CONFIG_FEATURE_HTTPD_SETUID
//#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP

/* If seted this you can use this server from internet superserver only */
//#define CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY

/* You can use this server as standalone, require libbb.a for linking */
//#define HTTPD_STANDALONE

/* Config options, disable this for do very small module */
//#define CONFIG_FEATURE_HTTPD_CGI
//#define CONFIG_FEATURE_HTTPD_BASIC_AUTH

#ifdef HTTPD_STANDALONE
/* standalone, enable all features */
#undef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
/* unset config option for remove warning as redefined */
#undef CONFIG_FEATURE_HTTPD_BASIC_AUTH
#undef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
#undef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
#undef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
#undef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
#undef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
#undef CONFIG_FEATURE_HTTPD_CGI
#undef CONFIG_FEATURE_HTTPD_SETUID
#undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
/* enable all features now */
#define CONFIG_FEATURE_HTTPD_BASIC_AUTH
#define CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
#define CONFIG_FEATURE_HTTPD_DECODE_URL_STR
#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
#define CONFIG_FEATURE_HTTPD_CGI
#define CONFIG_FEATURE_HTTPD_SETUID
#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP

/* require from libbb.a for linking */
const char *applet_name = "httpd";

void show_usage(void)
{
  fprintf(stderr, "Usage: %s [-p <port>] [-c configFile] [-d/-e <string>] "
		  "[-r realm] [-u user]\n", applet_name);
  exit(1);
}
#endif

#ifdef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
#undef CONFIG_FEATURE_HTTPD_SETUID  /* use inetd user.group config settings */
#undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP    /* so is not daemon */
/* inetd set stderr to accepted socket and we can`t true see debug messages */
#undef DEBUG
#endif

/* CGI environ size */
#ifdef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
#define ENVSIZE 50    /* set max 35 CGI_variable */
#else
#define ENVSIZE 15    /* minimal requires */
#endif

#define MAX_POST_SIZE (64*1024) /* 64k. Its Small? May be ;) */

#define MAX_MEMORY_BUFF 8192    /* IO buffer */

typedef struct HT_ACCESS {
	char *after_colon;
	struct HT_ACCESS *next;
	char before_colon[1];         /* really bigger, must last */
} Htaccess;

typedef struct
{
#ifdef CONFIG_FEATURE_HTTPD_CGI
  char *envp[ENVSIZE+1];
  int envCount;
#endif
  char buf[MAX_MEMORY_BUFF];

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
  const char *realm;
#endif
  const char *configFile;

  char rmt_ip[16];         /* for set env REMOTE_ADDR */
  unsigned port;           /* server initial port and for
			      set env REMOTE_PORT */

  const char *found_mime_type;
  off_t ContentLength;          /* -1 - unknown */
  time_t last_mod;
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
  int accepted_socket;
#define a_c_r config->accepted_socket
#define a_c_w config->accepted_socket
  int debugHttpd;          /* if seted, don`t stay daemon */
#else
#define a_c_r 0
#define a_c_w 1
#endif
  Htaccess *Httpd_conf_parsed;
} HttpdConfig;

static HttpdConfig *config;

static const char request_GET[] = "GET";    /* size algorithic optimize */

static const char* const suffixTable [] = {
/* Warning: shorted equalent suffix in one line must be first */
  ".htm.html", "text/html",
  ".jpg.jpeg", "image/jpeg",
  ".gif", "image/gif",
  ".png", "image/png",
  ".txt.h.c.cc.cpp", "text/plain",
  ".css", "text/css",
  ".wav", "audio/wav",
  ".avi", "video/x-msvideo",
  ".qt.mov", "video/quicktime",
  ".mpe.mpeg", "video/mpeg",
  ".mid.midi", "audio/midi",
  ".mp3", "audio/mpeg",
#if 0                        /* unpopular */
  ".au", "audio/basic",
  ".pac", "application/x-ns-proxy-autoconfig",
  ".vrml.wrl", "model/vrml",
#endif
  0, "application/octet-stream" /* default */
  };

typedef enum
{
  HTTP_OK = 200,
  HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
  HTTP_NOT_FOUND = 404,
  HTTP_NOT_IMPLEMENTED = 501,   /* used for unrecognized requests */
  HTTP_BAD_REQUEST = 400,       /* malformed syntax */
  HTTP_FORBIDDEN = 403,
  HTTP_INTERNAL_SERVER_ERROR = 500,
#if 0 /* future use */
  HTTP_CONTINUE = 100,
  HTTP_SWITCHING_PROTOCOLS = 101,
  HTTP_CREATED = 201,
  HTTP_ACCEPTED = 202,
  HTTP_NON_AUTHORITATIVE_INFO = 203,
  HTTP_NO_CONTENT = 204,
  HTTP_MULTIPLE_CHOICES = 300,
  HTTP_MOVED_PERMANENTLY = 301,
  HTTP_MOVED_TEMPORARILY = 302,
  HTTP_NOT_MODIFIED = 304,
  HTTP_PAYMENT_REQUIRED = 402,
  HTTP_BAD_GATEWAY = 502,
  HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
  HTTP_RESPONSE_SETSIZE=0xffffffff
#endif
} HttpResponseNum;

typedef struct
{
  HttpResponseNum type;
  const char *name;
  const char *info;
} HttpEnumString;

static const HttpEnumString httpResponseNames[] = {
  { HTTP_OK, "OK" },
  { HTTP_NOT_IMPLEMENTED, "Not Implemented",
    "The requested method is not recognized by this server." },
  { HTTP_UNAUTHORIZED, "Unauthorized", "" },
  { HTTP_NOT_FOUND, "Not Found",
    "The requested URL was not found on this server." },
  { HTTP_BAD_REQUEST, "Bad Request" ,
    "Unsupported method." },
  { HTTP_FORBIDDEN, "Forbidden", "" },
  { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error"
    "Internal Server Error" },
#if 0
  { HTTP_CREATED, "Created" },
  { HTTP_ACCEPTED, "Accepted" },
  { HTTP_NO_CONTENT, "No Content" },
  { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
  { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
  { HTTP_MOVED_TEMPORARILY, "Moved Temporarily" },
  { HTTP_NOT_MODIFIED, "Not Modified" },
  { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
  { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
#endif
};


static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
static const char Content_length[] = "Content-length:";


/*
 * sotring to:
 * .ext:mime/type
 * /path:user:pass
 * /path/subdir:user:pass
 * D:from
 * A:from
 * D:*
 */
static int conf_sort(const void *p1, const void *p2)
{
    const Htaccess *cl1 = *(const Htaccess **)p1;
    const Htaccess *cl2 = *(const Htaccess **)p2;
    char c1 = cl1->before_colon[0];
    char c2 = cl2->before_colon[0];
    int test;

#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
    /* .ext line up before other lines for simlify algorithm */
    test = c2 == '.';
    if(c1 == '.')
	return -(!test);
    if(test)
	return test;
#endif

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
    test = c1 == '/';
    /* /path line up before A/D lines for simlify algorithm */
    if(test) {
	if(c2 != '/')
	    return -test;
	/* a shortes path with user:pass must be first */
	return strlen(cl1->before_colon) - strlen(cl2->before_colon);
    } else if(c2 == '/')
	    return !test;
#endif

    /* D:from must move top */
    test = c2 == 'D' && cl2->after_colon[0] != 0;
    if(c1 == 'D' && cl1->after_colon[0] != 0) {
	return -(!test);
    }
    if(test)
	return test;

    /* next lines -  A:from */
    test = c2 == 'A' && cl2->after_colon[0] != 0;
    if(c1 == 'A' && cl1->after_colon[0] != 0) {
	return -(!test);
    }
    if(test)
	return test;

    /* end lines - D:* */
    test = c2 == 'D' && cl2->after_colon[0] == 0;
    if(c1 == 'D' && cl1->after_colon[0] == 0) {
	return -(!test);
    }
#ifdef DEBUG
    if(!test)
	error_msg_and_die("sort: can`t found compares!");
#endif
    return test;
}


/* flag */
#define FIRST_PARSE    0
#define SUBDIR_PARSE   1
#define SIGNALED_PARSE 2

static void parse_conf(const char *path, int flag)
{
#define bc cur->before_colon[0]
#define ac cur->after_colon[0]
    FILE *f;
    Htaccess *prev;
    Htaccess *cur;
    const char *cf = config->configFile;
    char buf[80];
    char *p0 = NULL;
    int deny_all = 0;   /* default A:* */
    int n = 0;          /* count config lines */

    if(flag == SUBDIR_PARSE || cf == NULL) {
	cf = p0 = alloca(strlen(path) + sizeof(httpd_conf) + 2);
	if(p0 == NULL) {
	    if(flag == FIRST_PARSE)
		error_msg_and_die(memory_exhausted);
	    return;
	}
	sprintf(p0, "%s/%s", path, httpd_conf);
    }

    while((f = fopen(cf, "r")) == NULL) {
	if(flag != FIRST_PARSE)
	    return;                 /* subdir config not found */
	if(p0 == NULL)              /* if -c option gived */
		perror_msg_and_die("%s", cf);
	p0 = NULL;
	cf = httpd_conf;            /* set -c ./httpd_conf */
    }

    prev = config->Httpd_conf_parsed;
    if(flag != SUBDIR_PARSE) {
	/* free previous setuped */
	while( prev ) {
		cur = prev;
		prev = cur->next;
		free(cur);
	}
	config->Httpd_conf_parsed = prev; /* eq NULL */
    } else {
	/* parse previous IP logic for merge */
	for(cur = prev; cur; cur = cur->next) {
	    if(bc == 'D' && ac == 0)
		deny_all++;
	    n++;
	    /* find last for set prev->next of merging */
	    if(cur != prev)
		prev = prev->next;
	}
    }

	/* This could stand some work */
    while ( (p0 = fgets(buf, 80, f)) != NULL) {
	char *p;
	char *colon;

	for(p = colon = p0; *p; p++) {
		if(*p == '#') {
			*p = 0;
			break;
		}
		if(isspace(*p)) {
			if(p != p0) {
				*p = 0;
				break;
			}
			p0++;
		}
		else if(*p == ':' && colon <= p0)
			colon = p;
	}

	/* test for empty or strange line */
	if (colon <= p0 || colon[1] == 0)
	    continue;
	if(colon[1] == '*')
	    colon[1] = 0;   /* Allow all */
	if(*p0 == 'a')
	    *p0 = 'A';
	if(*p0 == 'd')
	    *p0 = 'D';
	if(*p0 != 'A' && *p0 != 'D'
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
				    && *p0 != '/'
#endif
#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
					&& *p0 != '.'
#endif
						       )
	       continue;
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
	if(*p0 == '/' && colon[1] == 0) {
	    /* skip /path:* */
	    continue;
	}
#endif

	if(*p0 == 'A' || *p0 == 'D') {
	    if(colon[1] == 0) {
		if(*p0 == 'A' || deny_all != 0)
		    continue;   /* skip default A:* or double D:* */
	    }
	    if(deny_all != 0 && *p0 == 'A')
		continue;   // if previous setted rule D:* skip all subdir A:
	}

	/* storing current config line */
	cur = calloc(1, sizeof(Htaccess) + (p-p0));
	if(cur) {
	    if(*(colon-1) == '/' && (colon-1) != p0)
		colon[-1] = 0;      // remove last / from /path/
	    cur->after_colon = strcpy(cur->before_colon, p0);
	    cur->after_colon += (colon-p0);
	    *cur->after_colon++ = 0;

	    if(prev == NULL) {
		/* first line */
		config->Httpd_conf_parsed = prev = cur;
	    } else {
		prev->next = cur;
		prev = cur;
	    }
	    n++;
	}
   }
   fclose(f);

   if(n > 1) {
	/* sorting conf lines */
	Htaccess ** pcur;     /* array for qsort */

	prev = config->Httpd_conf_parsed;
	pcur = alloca((n + 1) * sizeof(Htaccess *));
	if(pcur == NULL) {
	    if(flag == FIRST_PARSE)
		error_msg_and_die(memory_exhausted);
	    return;
	}
	n = 0;
	for(cur = prev; cur; cur = cur->next)
		pcur[n++] = cur;
	pcur[n] = NULL;

	qsort(pcur, n, sizeof(Htaccess *), conf_sort);

	/* storing sorted config */
	config->Httpd_conf_parsed = *pcur;
	for(cur = *pcur; cur; cur = cur->next) {
#ifdef DEBUG
	    error_msg("%s: %s:%s", cf, cur->before_colon, cur->after_colon);
#endif
	    cur->next = *++pcur;
	}
    }
}

#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
/****************************************************************************
 *
 > $Function: encodeString()
 *
 * $Description: Given a string, html encode special characters.
 *   This is used for the -e command line option to provide an easy way
 *   for scripts to encode result data without confusing browsers.  The
 *   returned string pointer is memory allocated by malloc().
 *
 * $Parameters:
 *      (const char *) string . . The first string to encode.
 *
 * $Return: (char *) . . . .. . . A pointer to the encoded string.
 *
 * $Errors: Returns a null string ("") if memory is not available.
 *
 ****************************************************************************/
static char *encodeString(const char *string)
{
  /* take the simple route and encode everything */
  /* could possibly scan once to get length.     */
  int len = strlen(string);
  char *out = malloc(len*5 +1);
  char *p=out;
  char ch;

  if (!out) return "";
  while ((ch = *string++)) {
    // very simple check for what to encode
    if (isalnum(ch)) *p++ = ch;
    else p += sprintf(p, "&#%d", (unsigned char) ch);
  }
  *p=0;
  return out;
}
#endif          /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */

#ifdef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
/****************************************************************************
 *
 > $Function: decodeString()
 *
 * $Description: Given a URL encoded string, convert it to plain ascii.
 *   Since decoding always makes strings smaller, the decode is done in-place.
 *   Thus, callers should strdup() the argument if they do not want the
 *   argument modified.  The return is the original pointer, allowing this
 *   function to be easily used as arguments to other functions.
 *
 * $Parameters:
 *      (char *) string . . . The first string to decode.
 *
 * $Return: (char *)  . . . . A pointer to the decoded string (same as input).
 *
 * $Errors: None
 *
 ****************************************************************************/
static char *decodeString(char *string)
{
  /* note that decoded string is always shorter than original */
  char *orig = string;
  char *ptr = string;
  while (*ptr)
  {
    if (*ptr == '+')    { *string++ = ' '; ptr++; }
    else if (*ptr != '%') *string++ = *ptr++;
    else  {
      unsigned int value;
      sscanf(ptr+1, "%2X", &value);
      *string++ = value;
      ptr += 3;
    }
  }
  *string = '\0';
  return orig;
}
#endif          /* CONFIG_FEATURE_HTTPD_DECODE_URL_STR */


#ifdef CONFIG_FEATURE_HTTPD_CGI
/****************************************************************************
 *
 > $Function: addEnv()
 *
 * $Description: Add an enviornment variable setting to the global list.
 *    A NAME=VALUE string is allocated, filled, and added to the list of
 *    environment settings passed to the cgi execution script.
 *
 * $Parameters:
 *  (char *) name_before_underline - The first part environment variable name.
 *  (char *) name_after_underline  - The second part environment variable name.
 *  (char *) value  . . The value to which the env variable is set.
 *
 * $Return: (void)
 *
 * $Errors: Silently returns if the env runs out of space to hold the new item
 *
 ****************************************************************************/
static void addEnv(const char *name_before_underline,
			const char *name_after_underline, const char *value)
{
  char *s;

  if (config->envCount >= ENVSIZE)
	return;
  if (!value)
	value = "";
  s = malloc(strlen(name_before_underline) + strlen(name_after_underline) +
			strlen(value) + 3);
  if (s) {
    const char *underline = *name_after_underline ? "_" : "";

    sprintf(s,"%s%s%s=%s", name_before_underline, underline,
					name_after_underline, value);
    config->envp[config->envCount++] = s;
    config->envp[config->envCount] = 0;
  }
}

/* set environs SERVER_PORT and REMOTE_PORT */
static void addEnvPort(const char *port_name)
{
      char buf[16];

      sprintf(buf, "%u", config->port);
      addEnv(port_name, "PORT", buf);
}
#endif          /* CONFIG_FEATURE_HTTPD_CGI */

#ifdef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
/****************************************************************************
 *
 > $Function: addEnvCgi
 *
 * $Description: Create environment variables given a URL encoded arg list.
 *   For each variable setting the URL encoded arg list, create a corresponding
 *   environment variable.  URL encoded arguments have the form
 *      name1=value1&name2=value2&name3=&ignores
 *       from this example, name3 set empty value, tail without '=' skiping
 *
 * $Parameters:
 *      (char *) pargs . . . . A pointer to the URL encoded arguments.
 *
 * $Return: None
 *
 * $Errors: None
 *
 ****************************************************************************/
static void addEnvCgi(const char *pargs)
{
  char *args;
  char *memargs;
  if (pargs==0) return;

  /* args are a list of name=value&name2=value2 sequences */
  memargs = args = strdup(pargs);
  while (args && *args) {
    const char *name = args;
    char *value = strchr(args, '=');

    if (!value)         /* &XXX without '=' */
	break;
    *value++ = 0;
    args = strchr(value, '&');
    if (args)
	*args++ = 0;
    addEnv("CGI", name, decodeString(value));
  }
  free(memargs);
}
#endif /* CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV */


#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
/****************************************************************************
 *
 > $Function: decodeBase64()
 *
 > $Description: Decode a base 64 data stream as per rfc1521.
 *    Note that the rfc states that none base64 chars are to be ignored.
 *    Since the decode always results in a shorter size than the input, it is
 *    OK to pass the input arg as an output arg.
 *
 * $Parameter:
 *      (char *) Data . . . . A pointer to a base64 encoded string.
 *                            Where to place the decoded data.
 *
 * $Return: void
 *
 * $Errors: None
 *
 ****************************************************************************/
static void decodeBase64(char *Data)
{
  int i = 0;
  static const char base64ToBin[] =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

  const unsigned char *in = Data;
  // The decoded size will be at most 3/4 the size of the encoded
  unsigned long ch = 0;

  while (*in) {
    unsigned char conv = 0;

    while (*in) {
      const char *p64;

      p64 = strchr(base64ToBin, *in++);
      if(p64 == NULL)
	continue;
      conv = (p64 - base64ToBin);
      break;
    }
    ch = (ch << 6) | conv;
    i++;
    if (i== 4) {
      *Data++ = (char) (ch >> 16);
      *Data++ = (char) (ch >> 8);
      *Data++ = (char) ch;
      i = 0;
    }
  }
  *Data = 0;
}
#endif


#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
/****************************************************************************
 *
 > $Function: openServer()
 *
 * $Description: create a listen server socket on the designated port.
 *
 * $Return: (int)  . . . A connection socket. -1 for errors.
 *
 * $Errors: None
 *
 ****************************************************************************/
static int openServer(void)
{
  struct sockaddr_in lsocket;
  int fd;

  /* create the socket right now */
  /* inet_addr() returns a value that is already in network order */
  memset(&lsocket, 0, sizeof(lsocket));
  lsocket.sin_family = AF_INET;
  lsocket.sin_addr.s_addr = INADDR_ANY;
  lsocket.sin_port = htons(config->port) ;
  fd = socket(AF_INET, SOCK_STREAM, 0);
  if (fd >= 0) {
    /* tell the OS it's OK to reuse a previous address even though */
    /* it may still be in a close down state.  Allows bind to succeed. */
    int on = 1;
#ifdef SO_REUSEPORT
    setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ;
#else
    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ;
#endif
    if (bind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket)) == 0) {
      listen(fd, 9);
      signal(SIGCHLD, SIG_IGN);   /* prevent zombie (defunct) processes */
    } else {
	perror_msg_and_die("bind");
    }
  } else {
	perror_msg_and_die("create socket");
  }
  return fd;
}
#endif  /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */

/****************************************************************************
 *
 > $Function: sendHeaders()
 *
 * $Description: Create and send HTTP response headers.
 *   The arguments are combined and sent as one write operation.  Note that
 *   IE will puke big-time if the headers are not sent in one packet and the
 *   second packet is delayed for any reason.
 *
 * $Parameter:
 *      (HttpResponseNum) responseNum . . . The result code to send.
 *
 * $Return: (int)  . . . . writing errors
 *
 ****************************************************************************/
static int sendHeaders(HttpResponseNum responseNum)
{
  char *buf = config->buf;
  const char *responseString = "";
  const char *infoString = 0;
  unsigned int i;
  time_t timer = time(0);
  char timeStr[80];
  int len;

  for (i = 0;
	i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
		if (httpResponseNames[i].type == responseNum) {
			responseString = httpResponseNames[i].name;
			infoString = httpResponseNames[i].info;
			break;
		}
  }
  if (responseNum != HTTP_OK) {
	config->found_mime_type = "text/html";  // error message is HTML
  }

  /* emit the current date */
  strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
  len = sprintf(buf,
	"HTTP/1.0 %d %s\nContent-type: %s\r\n"
	"Date: %s\r\nConnection: close\r\n",
	  responseNum, responseString, config->found_mime_type, timeStr);

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
  if (responseNum == HTTP_UNAUTHORIZED) {
    len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
							    config->realm);
  }
#endif
  if (config->ContentLength != -1) {    /* file */
    strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
    len += sprintf(buf+len, "Last-Modified: %s\r\n%s %ld\r\n",
			      timeStr, Content_length, config->ContentLength);
  }
  strcat(buf, "\r\n");
  len += 2;
  if (infoString) {
    len += sprintf(buf+len,
	    "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
	    "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
	    responseNum, responseString,
	    responseNum, responseString, infoString);
  }
#ifdef DEBUG
  if (config->debugHttpd) fprintf(stderr, "Headers: '%s'", buf);
#endif
  return full_write(a_c_w, buf, len);
}

/****************************************************************************
 *
 > $Function: getLine()
 *
 * $Description: Read from the socket until an end of line char found.
 *
 *   Characters are read one at a time until an eol sequence is found.
 *
 * $Parameters:
 *      (char *) buf  . . Where to place the read result.
 *
 * $Return: (int) . . . . number of characters read.  -1 if error.
 *
 ****************************************************************************/
static int getLine(char *buf)
{
  int  count = 0;

  while (read(a_c_r, buf + count, 1) == 1) {
    if (buf[count] == '\r') continue;
    if (buf[count] == '\n') {
      buf[count] = 0;
      return count;
    }
    if(count < (MAX_MEMORY_BUFF-1))      /* check owerflow */
	count++;
  }
  if (count) return count;
  else return -1;
}

#ifdef CONFIG_FEATURE_HTTPD_CGI
/****************************************************************************
 *
 > $Function: sendCgi()
 *
 * $Description: Execute a CGI script and send it's stdout back
 *
 *   Environment variables are set up and the script is invoked with pipes
 *   for stdin/stdout.  If a post is being done the script is fed the POST
 *   data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
 *
 * $Parameters:
 *      (const char *) url . . . The requested URL (with leading /).
 *      (const char *urlArgs). . Any URL arguments.
 *      (const char *body) . . . POST body contents.
 *      (int bodyLen)  . . . . . Length of the post body.
 *      (const char *cookie) . . For set HTTP_COOKIE.

 *
 * $Return: (char *)  . . . . A pointer to the decoded string (same as input).
 *
 * $Errors: None
 *
 ****************************************************************************/
static int sendCgi(const char *url,
		   const char *request, const char *urlArgs,
		   const char *body, int bodyLen, const char *cookie)
{
  int fromCgi[2];  /* pipe for reading data from CGI */
  int toCgi[2];    /* pipe for sending data to CGI */

  static char * argp[] = { 0, 0 };
  int pid = 0;
  int inFd;
  int outFd;
  int firstLine = 1;

  do {
    if (pipe(fromCgi) != 0) {
      break;
    }
    if (pipe(toCgi) != 0) {
      break;
    }

    pid = fork();
    if (pid < 0) {
	pid = 0;
	break;
    }

    if (!pid) {
      /* child process */
      char *script;
      char *purl = strdup( url );
      char realpath_buff[MAXPATHLEN];

      if(purl == NULL)
	_exit(242);

      inFd  = toCgi[0];
      outFd = fromCgi[1];

      dup2(inFd, 0);  // replace stdin with the pipe
      dup2(outFd, 1);  // replace stdout with the pipe

#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
      if (!config->debugHttpd)
#endif
	dup2(outFd, 2);  // replace stderr with the pipe

      close(toCgi[0]);
      close(toCgi[1]);
      close(fromCgi[0]);
      close(fromCgi[1]);

      /*
       * Find PATH_INFO.
       */
      script = purl;
      while((script = strchr( script + 1, '/' )) != NULL) {
	/* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
	struct stat sb;

	*script = '\0';
	if(is_directory(purl + 1, 1, &sb) == 0) {
		/* not directory, found script.cgi/PATH_INFO */
		*script = '/';
		break;
	}
	*script = '/';          /* is directory, find next '/' */
      }
      addEnv("PATH", "INFO", script);   /* set /PATH_INFO or NULL */
      addEnv("PATH",           "",         getenv("PATH"));
      addEnv("REQUEST",        "METHOD",   request);
      if(urlArgs) {
	char *uri = alloca(strlen(purl) + 2 + strlen(urlArgs));
	if(uri)
	    sprintf(uri, "%s?%s", purl, urlArgs);
	addEnv("REQUEST",        "URI",   uri);
      } else {
	addEnv("REQUEST",        "URI",   purl);
      }
      if(script != NULL)
	*script = '\0';         /* reduce /PATH_INFO */
      /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
      addEnv("SCRIPT_NAME",    "",         purl);
      addEnv("QUERY_STRING",   "",         urlArgs);
      addEnv("SERVER",         "SOFTWARE", httpdVersion);
      addEnv("SERVER",         "PROTOCOL", "HTTP/1.0");
      addEnv("GATEWAY_INTERFACE", "",      "CGI/1.1");
#ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
      addEnv("REMOTE",         "ADDR",     config->rmt_ip);
      addEnvPort("REMOTE");
#else
      addEnv("REMOTE_ADDR",     "",        config->rmt_ip);
#endif
      if(bodyLen) {
	char sbl[32];

	sprintf(sbl, "%d", bodyLen);
	addEnv("CONTENT_LENGTH", "", sbl);
      }
      if(cookie)
	addEnv("HTTP_COOKIE", "", cookie);

#ifdef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
      if (request != request_GET) {
	addEnvCgi(body);
      } else {
	addEnvCgi(urlArgs);
      }
#endif

	/* set execve argp[0] without path */
      argp[0] = strrchr( purl, '/' ) + 1;
	/* but script argp[0] must have absolute path and chdiring to this */
      if(realpath(purl + 1, realpath_buff) != NULL) {
	    script = strrchr(realpath_buff, '/');
	    if(script) {
		*script = '\0';
		if(chdir(realpath_buff) == 0) {
		    *script = '/';
      // now run the program.  If it fails, use _exit() so no destructors
      // get called and make a mess.
		    execve(realpath_buff, argp, config->envp);
		}
	    }
      }
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
      config->accepted_socket = 1;      /* send to stdout */
#endif
      sendHeaders(HTTP_NOT_FOUND);
      _exit(242);
    } /* end child */

  } while (0);

  if (pid) {
    /* parent process */
    int status;

    inFd  = fromCgi[0];
    outFd = toCgi[1];
    close(fromCgi[1]);
    close(toCgi[0]);
    if (body) full_write(outFd, body, bodyLen);
    close(outFd);

    while (1) {
      struct timeval timeout;
      fd_set readSet;
      char buf[160];
      int nfound;
      int count;

      FD_ZERO(&readSet);
      FD_SET(inFd, &readSet);

      /* Now wait on the set of sockets! */
      timeout.tv_sec = 0;
      timeout.tv_usec = 10000;
      nfound = select(inFd + 1, &readSet, 0, 0, &timeout);

      if (nfound <= 0) {
	if (waitpid(pid, &status, WNOHANG) > 0) {
	  close(inFd);
#ifdef DEBUG
	  if (config->debugHttpd) {
	    if (WIFEXITED(status))
	      error_msg("piped has exited with status=%d", WEXITSTATUS(status));
	    if (WIFSIGNALED(status))
	      error_msg("piped has exited with signal=%d", WTERMSIG(status));
	  }
#endif
	  pid = -1;
	  break;
	}
      } else {
	int s = a_c_w;

	// There is something to read
	count = full_read(inFd, buf, sizeof(buf)-1);
	// If a read returns 0 at this point then some type of error has
	// occurred.  Bail now.
	if (count == 0) break;
	if (count > 0) {
	  if (firstLine) {
	    /* check to see if the user script added headers */
	    if (strncmp(buf, "HTTP/1.0 200 OK\n", 4) != 0) {
	      full_write(s, "HTTP/1.0 200 OK\n", 16);
	    }
	    if (strstr(buf, "ontent-") == 0) {
	      full_write(s, "Content-type: text/plain\n\n", 26);
	    }
	    firstLine=0;
	  }
	  full_write(s, buf, count);
#ifdef DEBUG
	  if (config->debugHttpd)
		fprintf(stderr, "cgi read %d bytes\n", count);
#endif
	}
      }
    }
  }
  return 0;
}
#endif          /* CONFIG_FEATURE_HTTPD_CGI */

/****************************************************************************
 *
 > $Function: sendFile()
 *
 * $Description: Send a file response to an HTTP request
 *
 * $Parameter:
 *      (const char *) url . . The URL requested.
 *      (char *) buf . . . . . The stack buffer.
 *
 * $Return: (int)  . . . . . . Always 0.
 *
 ****************************************************************************/
static int sendFile(const char *url, char *buf)
{
  char * suffix;
  int  f;
  const char * const * table;
  const char * try_suffix;

  suffix = strrchr(url, '.');

  for (table = suffixTable; *table; table += 2)
	if(suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
		try_suffix += strlen(suffix);
		if(*try_suffix == 0 || *try_suffix == '.')
			break;
	}
  /* also, if not found, set default as "application/octet-stream";  */
  config->found_mime_type = *(table+1);
#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
  if (suffix) {
    Htaccess * cur;

    for (cur = config->Httpd_conf_parsed; cur; cur = cur->next) {
	if(strcmp(cur->before_colon, suffix) == 0) {
		config->found_mime_type = cur->after_colon;
		break;
	}
    }
  }
#endif  /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */

#ifdef DEBUG
    if (config->debugHttpd)
	fprintf(stderr, "Sending file '%s' Content-type: %s\n",
					url, config->found_mime_type);
#endif

  f = open(url, O_RDONLY);
  if (f >= 0) {
	int count;

	sendHeaders(HTTP_OK);
	while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
		full_write(a_c_w, buf, count);
	}
	close(f);
  } else {
#ifdef DEBUG
	if (config->debugHttpd)
		perror_msg("Unable to open '%s'", url);
#endif
	sendHeaders(HTTP_NOT_FOUND);
  }

  return 0;
}

/****************************************************************************
 *
 > $Function: checkPerm()
 *
 * $Description: Check the permission file for access.
 *
 *   If config file isn't present, everything is allowed.
 *   Entries are of the form you can see example from header source
 *
 * $Parameters:
 *      (const char *) path  . . . . The file path or NULL for ip addresses.
 *      (const char *) request . . . User information to validate.
 *
 * $Return: (int)  . . . . . . . . . 1 if request OK, 0 otherwise.
 *
 ****************************************************************************/


static int checkPerm(const char *path, const char *request)
{
    Htaccess * cur;
    const char *p;

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
    int ipaddr = path == NULL;
    const char *prev = NULL;
#else
#   define ipaddr 1
#endif

    /* This could stand some work */
    for (cur = config->Httpd_conf_parsed; cur; cur = cur->next) {
	const char *p0 = cur->before_colon;

	if(*p0 == 'A' || *p0 == 'D') {
		if(!ipaddr)
			continue;
	} else {
		if(ipaddr)
			continue;
#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
		if(*p0 == '.')
			continue;
#endif
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
		if(prev != NULL && strcmp(prev, p0) != 0)
			continue;       /* find next identical */
#endif
	}

	p = cur->after_colon;
#ifdef DEBUG
	if (config->debugHttpd)
		fprintf(stderr,"checkPerm: '%s' ? '%s'\n",
				(ipaddr ? p : p0), request);
#endif
	if(ipaddr) {
		if(strncmp(p, request, strlen(p)) != 0)
			continue;
		return *p0 == 'A';   /* Allow/Deny */

	}
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
	  else {
		int l = strlen(p0);

		if(strncmp(p0, path, l) == 0 &&
				(l == 1 || path[l] == '/' || path[l] == 0)) {
			/* path match found.  Check request */
			if (strcmp(p, request) == 0)
				return 1;   /* Ok */
			/* unauthorized, but check next /path:user:password */
			prev = p0;
		}
	  }
#endif
    }   /* for */

#ifndef CONFIG_FEATURE_HTTPD_BASIC_AUTH
	/* if uncofigured, return 1 - access from all */
    return 1;
#else
    return prev == NULL;
#endif
}


/****************************************************************************
 *
 > $Function: handleIncoming()
 *
 * $Description: Handle an incoming http request.
 *
 ****************************************************************************/
static void handleIncoming(void)
{
  char *buf = config->buf;
  char *url;
  char *purl;
  int  blank = -1;
  char *urlArgs;
#ifdef CONFIG_FEATURE_HTTPD_CGI
  const char *prequest = request_GET;
  char *body = 0;
  long length=0;
  char *cookie = 0;
#endif
  char *test;
  struct stat sb;

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
  int credentials = -1;  /* if not requred this is Ok */
#endif

  do {
    int  count;

    if (getLine(buf) <= 0)
	break;  /* closed */

    purl = strpbrk(buf, " \t");
    if(purl == NULL) {
BAD_REQUEST:
      sendHeaders(HTTP_BAD_REQUEST);
      break;
    }
    *purl = 0;
#ifdef CONFIG_FEATURE_HTTPD_CGI
    if(strcasecmp(buf, prequest) != 0) {
	prequest = "POST";
	if(strcasecmp(buf, prequest) != 0) {
	    sendHeaders(HTTP_NOT_IMPLEMENTED);
	    break;
	}
    }
#else
    if(strcasecmp(buf, request_GET) != 0) {
	sendHeaders(HTTP_NOT_IMPLEMENTED);
	break;
    }
#endif
    *purl = ' ';
    count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);

    if (count < 1 || buf[0] != '/') {
      /* Garbled request/URL */
      goto BAD_REQUEST;
    }
    url = alloca(strlen(buf) + 12);      /* + sizeof("/index.html\0") */
    if(url == NULL) {
	sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
	break;
    }
    strcpy(url, buf);
    /* extract url args if present */
    urlArgs = strchr(url, '?');
    if (urlArgs) {
      *urlArgs++ = 0;   /* next code can set '/' to this pointer,
			   but CGI script can`t be a directory */
    }

    /* algorithm stolen from libbb simplify_path(),
       but don`t strdup and reducing trailing slash */
    purl = test = url;

    do {
	if (*purl == '/') {
	    if (*test == '/') {        /* skip duplicate (or initial) slash */
		continue;
	    } else if (*test == '.') {
		if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
		    continue;
		} else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
		    ++test;
		    if (purl == url) {
			/* protect out root */
			goto BAD_REQUEST;
		    }
		    while (*--purl != '/');    /* omit previous dir */
		    continue;
		}
	    }
	}
	*++purl = *test;
    } while (*++test);

    *++purl = 0;        /* so keep last character */
    test = purl;        /* end ptr */

    /* If URL is directory, adding '/' */
    if(test[-1] != '/') {
	    if ( is_directory(url + 1, 1, &sb) ) {
		    *test++ = '/';
		    *test = 0;
		    purl = test;    /* end ptr */
	    }
    }
#ifdef DEBUG
    if (config->debugHttpd)
	fprintf(stderr, "url='%s', args=%s\n", url, urlArgs);
#endif

    test = url;
    while((test = strchr( test + 1, '/' )) != NULL) {
	/* have path1/path2 */
	*test = '\0';
	if( is_directory(url + 1, 1, &sb) ) {
		/* may be having subdir config */
		parse_conf(url + 1, SUBDIR_PARSE);
	}
	*test = '/';
    }

    // read until blank line for HTTP version specified, else parse immediate
    while (blank >= 0 && (count = getLine(buf)) > 0) {

#ifdef DEBUG
      if (config->debugHttpd) fprintf(stderr, "Header: '%s'\n", buf);
#endif

#ifdef CONFIG_FEATURE_HTTPD_CGI
      /* try and do our best to parse more lines */
      if ((strncasecmp(buf, Content_length, 15) == 0)) {
	if(prequest != request_GET)
		length = strtol(buf + 15, 0, 0); // extra read only for POST
      } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
		for(test = buf + 7; isspace(*test); test++)
			;
		cookie = strdup(test);
      }
#endif

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
      if (strncasecmp(buf, "Authorization:", 14) == 0) {
	/* We only allow Basic credentials.
	 * It shows up as "Authorization: Basic <userid:password>" where
	 * the userid:password is base64 encoded.
	 */
	for(test = buf + 14; isspace(*test); test++)
		;
	if (strncasecmp(test, "Basic", 5) != 0)
		continue;

	test += 5;  /* decodeBase64() skiping space self */
	decodeBase64(test);
	credentials = checkPerm(url, test);
      }
#endif          /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */

    }   /* while extra header reading */


    if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 ||
			checkPerm(NULL, config->rmt_ip) == 0) {
		/* protect listing [/path]/httpd_conf or IP deny */
#ifdef CONFIG_FEATURE_HTTPD_CGI
FORBIDDEN:      /* protect listing /cgi-bin */
#endif
		sendHeaders(HTTP_FORBIDDEN);
		break;
    }

#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
    if (credentials <= 0 && checkPerm(url, ":") == 0) {
      sendHeaders(HTTP_UNAUTHORIZED);
      break;
    }
#endif

    test = url + 1;      /* skip first '/' */

#ifdef CONFIG_FEATURE_HTTPD_CGI
    /* if strange Content-Length */
    if (length < 0 || length > MAX_POST_SIZE)
	break;

    if (length > 0) {
      body = malloc(length + 1);
      if (body) {
	length = full_read(a_c_r, body, length);
	if(length < 0)          // closed
		length = 0;
	body[length] = 0;       // always null terminate for safety
      }
    }

    if (strncmp(test, "cgi-bin", 7) == 0) {
		if(test[7] == 0 || (test[7] == '/' && test[8] == 0))
			goto FORBIDDEN;     // protect listing cgi-bin
		sendCgi(url, prequest, urlArgs, body, length, cookie);
    } else {
	if (prequest != request_GET)
		sendHeaders(HTTP_NOT_IMPLEMENTED);
	else {
#endif  /* CONFIG_FEATURE_HTTPD_CGI */
		if(purl[-1] == '/')
			strcpy(purl, "index.html");
		if ( stat(test, &sb ) == 0 ) {
			config->ContentLength = sb.st_size;
			config->last_mod = sb.st_mtime;
		}
		sendFile(test, buf);
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
		/* unset if non inetd looped */
		config->ContentLength = -1;
#endif

#ifdef CONFIG_FEATURE_HTTPD_CGI
	}
    }
#endif

  } while (0);


#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
/* from inetd don`t looping: freeing, closing automatic from exit always */
# ifdef DEBUG
  if (config->debugHttpd) fprintf(stderr, "closing socket\n");
# endif
# ifdef CONFIG_FEATURE_HTTPD_CGI
  free(body);
  free(cookie);
# endif
  shutdown(a_c_w, SHUT_WR);
  shutdown(a_c_r, SHUT_RD);
  close(config->accepted_socket);
#endif  /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
}

/****************************************************************************
 *
 > $Function: miniHttpd()
 *
 * $Description: The main http server function.
 *
 *   Given an open socket fildes, listen for new connections and farm out
 *   the processing as a forked process.
 *
 * $Parameters:
 *      (int) server. . . The server socket fildes.
 *
 * $Return: (int) . . . . Always 0.
 *
 ****************************************************************************/
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
static int miniHttpd(int server)
{
  fd_set readfd, portfd;
  int nfound;

  FD_ZERO(&portfd);
  FD_SET(server, &portfd);

  /* copy the ports we are watching to the readfd set */
  while (1) {
    readfd = portfd;

    /* Now wait INDEFINATELY on the set of sockets! */
    nfound = select(server + 1, &readfd, 0, 0, 0);

    switch (nfound) {
    case 0:
      /* select timeout error! */
      break ;
    case -1:
      /* select error */
      break;
    default:
      if (FD_ISSET(server, &readfd)) {
	int on;
	struct sockaddr_in fromAddr;

	unsigned int addr;
	socklen_t fromAddrLen = sizeof(fromAddr);
	int s = accept(server,
		       (struct sockaddr *)&fromAddr, &fromAddrLen);

	if (s < 0) {
	  continue;
	}
	config->accepted_socket = s;
	addr = ntohl(fromAddr.sin_addr.s_addr);
	sprintf(config->rmt_ip, "%u.%u.%u.%u",
		(unsigned char)(addr >> 24),
		(unsigned char)(addr >> 16),
		(unsigned char)(addr >> 8),
				addr & 0xff);
	config->port = ntohs(fromAddr.sin_port);
#ifdef DEBUG
	if (config->debugHttpd) {
		error_msg("connection from IP=%s, port %u\n",
					config->rmt_ip, config->port);
	}
#endif
	/*  set the KEEPALIVE option to cull dead connections */
	on = 1;
	setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on));

	if (config->debugHttpd || fork() == 0) {
	  /* This is the spawned thread */
	  handleIncoming();
	  if(!config->debugHttpd)
		exit(0);
	}
	close(s);
      }
    }
  } // while (1)
  return 0;
}

#else
    /* from inetd */

static int miniHttpd(void)
{
  struct sockaddr_in fromAddrLen;
  socklen_t sinlen = sizeof (struct sockaddr_in);
  unsigned int addr;

  getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen);
  addr = ntohl(fromAddrLen.sin_addr.s_addr);
  sprintf(config->rmt_ip, "%u.%u.%u.%u",
		(unsigned char)(addr >> 24),
		(unsigned char)(addr >> 16),
		(unsigned char)(addr >> 8),
				addr & 0xff);
  config->port = ntohs(fromAddrLen.sin_port);
  handleIncoming();
  return 0;
}
#endif  /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */

#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
static void sighup_handler(int sig)
{
	/* set and reset */
	struct sigaction sa;

	sa.sa_handler = sighup_handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	sigaction(SIGHUP, &sa, NULL);
	parse_conf(default_patch_httpd_conf,
		    sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
}
#endif

#ifdef HTTPD_STANDALONE
int main(int argc, char *argv[])
#else
int httpd_main(int argc, char *argv[])
#endif
{
  const char *home_httpd = home;

#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
  int server;
#endif

#ifdef CONFIG_FEATURE_HTTPD_SETUID
  long uid = -1;
#endif

  config = xcalloc(1, sizeof(*config));
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
  config->realm = "Web Server Authentication";
#endif

#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
  config->port = 80;
#endif

  config->ContentLength = -1;

  /* check if user supplied a port number */
  for (;;) {
    int c = getopt( argc, argv, "c:h:"
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
				"p:v"
#endif
#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
		"e:"
#endif
#ifdef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
		"d:"
#endif
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
		"r:"
#endif
#ifdef CONFIG_FEATURE_HTTPD_SETUID
		"u:"
#endif
    );
    if (c == EOF) break;
    switch (c) {
    case 'c':
      config->configFile = optarg;
      break;
    case 'h':
      home_httpd = optarg;
      break;
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
    case 'v':
      config->debugHttpd = 1;
      break;
    case 'p':
      config->port = atoi(optarg);
      if(config->port <= 0 || config->port > 0xffff)
	error_msg_and_die("invalid %s for -p", optarg);
      break;
#endif
#ifdef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
    case 'd':
      printf("%s", decodeString(optarg));
      return 0;
#endif
#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
    case 'e':
      printf("%s", encodeString(optarg));
      return 0;
#endif
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
    case 'r':
      config->realm = optarg;
      break;
#endif
#ifdef CONFIG_FEATURE_HTTPD_SETUID
    case 'u':
      {
	char *e;

	uid = strtol(optarg, &e, 0);
	if(*e != '\0') {
		/* not integer */
		uid = my_getpwnam(optarg);
	}
      }
      break;
#endif
    default:
      error_msg("%s", httpdVersion);
      show_usage();
    }
  }

  if(chdir(home_httpd)) {
    perror_msg_and_die("can`t chdir to %s", home_httpd);
  }
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
  server = openServer();
# ifdef CONFIG_FEATURE_HTTPD_SETUID
  /* drop privilegies */
  if(uid > 0)
	setuid(uid);
# endif
# ifdef CONFIG_FEATURE_HTTPD_CGI
  addEnvPort("SERVER");
# endif
#endif

#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
  sighup_handler(0);
#else
  parse_conf(default_patch_httpd_conf, FIRST_PARSE);
#endif

#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
  if (!config->debugHttpd) {
    if (daemon(1, 0) < 0)     /* don`t change curent directory */
	perror_msg_and_die("daemon");
  }
  return miniHttpd(server);
#else
  return miniHttpd();
#endif
}