summaryrefslogtreecommitdiff
path: root/networking/httpd.c
blob: bc081c1bdfe4faae190871ae696662428d941c7a (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
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
/* vi: set sw=4 ts=4: */
/*
 * httpd implementation for busybox
 *
 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
 * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
 *
 * simplify patch stolen from libbb without using strdup
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 *
 *****************************************************************************
 *
 * 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 starts by "/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.
 *
 * Doc:
 * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
 *
 * The applet 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 "&#60Hello&#32World&#62"
 * Note that url encoding for arguments is not the same as html encoding for
 * presentation.  -d decodes an url-encoded argument while -e encodes in html
 * for page display.
 *
 * httpd.conf has the following format:
 *
 * H:/serverroot     # define the server root. It will override -h
 * A:172.20.         # Allow address from 172.20.0.0/16
 * A:10.0.0.0/25     # Allow any address from 10.0.0.0-10.0.0.127
 * A:10.0.0.0/255.255.255.128  # Allow any address that previous set
 * A:127.0.0.1       # Allow local loopback connections
 * D:*               # Deny from other IP connections
 * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
 * I:index.html      # Show index.html when a directory is requested
 *
 * P:/url:[http://]hostname[:port]/new/path
 *                   # When /urlXXXXXX is requested, reverse proxy
 *                   # it to http://hostname[:port]/new/pathXXXXXX
 *
 * /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
 * *.php:/path/php   # run xxx.php through an interpreter
 *
 * A/D may be as a/d or allow/deny - only first char matters.
 * Deny/Allow IP logic:
 *  - Default is to allow all (Allow all (A:*) is a no-op).
 *  - Deny rules take precedence over allow rules.
 *  - "Deny all" rule (D:*) is applied last.
 *
 * Example:
 *   1. Allow only specified addresses
 *     A:172.20          # Allow any address that begins with 172.20.
 *     A:10.10.          # Allow any address that begins with 10.10.
 *     A:127.0.0.1       # Allow local loopback connections
 *     D:*               # Deny from other IP connections
 *
 *   2. Only deny specified addresses
 *     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:*             # (optional line added for clarity)
 *
 * If a sub directory contains a config file it is parsed and merged with
 * any existing settings as if it was appended to the original configuration.
 *
 * subdir paths are relative to the containing subdir and thus cannot
 * affect the parent rules.
 *
 * Note that since the sub dir is parsed in the forked thread servicing the
 * subdir http request, any merge is discarded when the process exits.  As a
 * result, the subdir settings only have a lifetime of a single request.
 *
 * Custom error pages can contain an absolute path or be relative to
 * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
 * page can only be defined in the root configuration file and are not taken
 * into account in local (directories) config files.
 *
 * If -c is not set, an attempt will be made to open the default
 * root configuration file.  If -c is set and the file is not found, the
 * server exits with an error.
 *
 */
 /* TODO: use TCP_CORK, parse_config() */

#include "libbb.h"
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
# include <sys/sendfile.h>
#endif

#define DEBUG 0

#define IOBUF_SIZE 8192    /* IO buffer */

/* amount of buffering in a pipe */
#ifndef PIPE_BUF
# define PIPE_BUF 4096
#endif
#if PIPE_BUF >= IOBUF_SIZE
# error "PIPE_BUF >= IOBUF_SIZE"
#endif

#define HEADER_READ_TIMEOUT 60

static const char DEFAULT_PATH_HTTPD_CONF[] ALIGN1 = "/etc";
static const char HTTPD_CONF[] ALIGN1 = "httpd.conf";
static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";

typedef struct has_next_ptr {
	struct has_next_ptr *next;
} has_next_ptr;

/* Must have "next" as a first member */
typedef struct Htaccess {
	struct Htaccess *next;
	char *after_colon;
	char before_colon[1];  /* really bigger, must be last */
} Htaccess;

/* Must have "next" as a first member */
typedef struct Htaccess_IP {
	struct Htaccess_IP *next;
	unsigned ip;
	unsigned mask;
	int allow_deny;
} Htaccess_IP;

/* Must have "next" as a first member */
typedef struct Htaccess_Proxy {
	struct Htaccess_Proxy *next;
	char *url_from;
	char *host_port;
	char *url_to;
} Htaccess_Proxy;

enum {
	HTTP_OK = 200,
	HTTP_PARTIAL_CONTENT = 206,
	HTTP_MOVED_TEMPORARILY = 302,
	HTTP_BAD_REQUEST = 400,       /* malformed syntax */
	HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
	HTTP_NOT_FOUND = 404,
	HTTP_FORBIDDEN = 403,
	HTTP_REQUEST_TIMEOUT = 408,
	HTTP_NOT_IMPLEMENTED = 501,   /* used for unrecognized requests */
	HTTP_INTERNAL_SERVER_ERROR = 500,
	HTTP_CONTINUE = 100,
#if 0   /* future use */
	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_NOT_MODIFIED = 304,
	HTTP_PAYMENT_REQUIRED = 402,
	HTTP_BAD_GATEWAY = 502,
	HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
	HTTP_RESPONSE_SETSIZE = 0xffffffff
#endif
};

static const uint16_t http_response_type[] ALIGN2 = {
	HTTP_OK,
#if ENABLE_FEATURE_HTTPD_RANGES
	HTTP_PARTIAL_CONTENT,
#endif
	HTTP_MOVED_TEMPORARILY,
	HTTP_REQUEST_TIMEOUT,
	HTTP_NOT_IMPLEMENTED,
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	HTTP_UNAUTHORIZED,
#endif
	HTTP_NOT_FOUND,
	HTTP_BAD_REQUEST,
	HTTP_FORBIDDEN,
	HTTP_INTERNAL_SERVER_ERROR,
#if 0   /* not implemented */
	HTTP_CREATED,
	HTTP_ACCEPTED,
	HTTP_NO_CONTENT,
	HTTP_MULTIPLE_CHOICES,
	HTTP_MOVED_PERMANENTLY,
	HTTP_NOT_MODIFIED,
	HTTP_BAD_GATEWAY,
	HTTP_SERVICE_UNAVAILABLE,
#endif
};

static const struct {
	const char *name;
	const char *info;
} http_response[ARRAY_SIZE(http_response_type)] = {
	{ "OK", NULL },
#if ENABLE_FEATURE_HTTPD_RANGES
	{ "Partial Content", NULL },
#endif
	{ "Found", NULL },
	{ "Request Timeout", "No request appeared within 60 seconds" },
	{ "Not Implemented", "The requested method is not recognized" },
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	{ "Unauthorized", "" },
#endif
	{ "Not Found", "The requested URL was not found" },
	{ "Bad Request", "Unsupported method" },
	{ "Forbidden", ""  },
	{ "Internal Server Error", "Internal Server Error" },
#if 0   /* not implemented */
	{ "Created" },
	{ "Accepted" },
	{ "No Content" },
	{ "Multiple Choices" },
	{ "Moved Permanently" },
	{ "Not Modified" },
	{ "Bad Gateway", "" },
	{ "Service Unavailable", "" },
#endif
};


struct globals {
	int verbose;            /* must be int (used by getopt32) */
	smallint flg_deny_all;

	unsigned rmt_ip;	/* used for IP-based allow/deny rules */
	time_t last_mod;
	char *rmt_ip_str;       /* for $REMOTE_ADDR and $REMOTE_PORT */
	const char *bind_addr_or_port;

	const char *g_query;
	const char *opt_c_configFile;
	const char *home_httpd;
	const char *index_page;

	const char *found_mime_type;
	const char *found_moved_temporarily;
	Htaccess_IP *ip_a_d;    /* config allow/deny lines */

	IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
	IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
	IF_FEATURE_HTTPD_CGI(char *referer;)
	IF_FEATURE_HTTPD_CGI(char *user_agent;)
	IF_FEATURE_HTTPD_CGI(char *host;)
	IF_FEATURE_HTTPD_CGI(char *http_accept;)
	IF_FEATURE_HTTPD_CGI(char *http_accept_language;)

	off_t file_size;        /* -1 - unknown */
#if ENABLE_FEATURE_HTTPD_RANGES
	off_t range_start;
	off_t range_end;
	off_t range_len;
#endif

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	Htaccess *g_auth;       /* config user:password lines */
#endif
	Htaccess *mime_a;       /* config mime types */
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
	Htaccess *script_i;     /* config script interpreters */
#endif
	char *iobuf;	        /* [IOBUF_SIZE] */
#define hdr_buf bb_common_bufsiz1
	char *hdr_ptr;
	int hdr_cnt;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
	const char *http_error_page[ARRAY_SIZE(http_response_type)];
#endif
#if ENABLE_FEATURE_HTTPD_PROXY
	Htaccess_Proxy *proxy;
#endif
};
#define G (*ptr_to_globals)
#define verbose           (G.verbose          )
#define flg_deny_all      (G.flg_deny_all     )
#define rmt_ip            (G.rmt_ip           )
#define bind_addr_or_port (G.bind_addr_or_port)
#define g_query           (G.g_query          )
#define opt_c_configFile  (G.opt_c_configFile )
#define home_httpd        (G.home_httpd       )
#define index_page        (G.index_page       )
#define found_mime_type   (G.found_mime_type  )
#define found_moved_temporarily (G.found_moved_temporarily)
#define last_mod          (G.last_mod         )
#define ip_a_d            (G.ip_a_d           )
#define g_realm           (G.g_realm          )
#define remoteuser        (G.remoteuser       )
#define referer           (G.referer          )
#define user_agent        (G.user_agent       )
#define host              (G.host             )
#define http_accept       (G.http_accept      )
#define http_accept_language (G.http_accept_language)
#define file_size         (G.file_size        )
#if ENABLE_FEATURE_HTTPD_RANGES
#define range_start       (G.range_start      )
#define range_end         (G.range_end        )
#define range_len         (G.range_len        )
#else
enum {
	range_start = 0,
	range_end = MAXINT(off_t) - 1,
	range_len = MAXINT(off_t),
};
#endif
#define rmt_ip_str        (G.rmt_ip_str       )
#define g_auth            (G.g_auth           )
#define mime_a            (G.mime_a           )
#define script_i          (G.script_i         )
#define iobuf             (G.iobuf            )
#define hdr_ptr           (G.hdr_ptr          )
#define hdr_cnt           (G.hdr_cnt          )
#define http_error_page   (G.http_error_page  )
#define proxy             (G.proxy            )
#define INIT_G() do { \
	SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
	IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
	bind_addr_or_port = "80"; \
	index_page = "index.html"; \
	file_size = -1; \
} while (0)


#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)

/* Prototypes */
enum {
	SEND_HEADERS     = (1 << 0),
	SEND_BODY        = (1 << 1),
	SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
};
static void send_file_and_exit(const char *url, int what) NORETURN;

static void free_llist(has_next_ptr **pptr)
{
	has_next_ptr *cur = *pptr;
	while (cur) {
		has_next_ptr *t = cur;
		cur = cur->next;
		free(t);
	}
	*pptr = NULL;
}

static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
{
	free_llist((has_next_ptr**)pptr);
}

static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
{
	free_llist((has_next_ptr**)pptr);
}

/* Returns presumed mask width in bits or < 0 on error.
 * Updates strp, stores IP at provided pointer */
static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
{
	const char *p = *strp;
	int auto_mask = 8;
	unsigned ip = 0;
	int j;

	if (*p == '/')
		return -auto_mask;

	for (j = 0; j < 4; j++) {
		unsigned octet;

		if ((*p < '0' || *p > '9') && *p != '/' && *p)
			return -auto_mask;
		octet = 0;
		while (*p >= '0' && *p <= '9') {
			octet *= 10;
			octet += *p - '0';
			if (octet > 255)
				return -auto_mask;
			p++;
		}
		if (*p == '.')
			p++;
		if (*p != '/' && *p)
			auto_mask += 8;
		ip = (ip << 8) | octet;
	}
	if (*p) {
		if (*p != endc)
			return -auto_mask;
		p++;
		if (*p == '\0')
			return -auto_mask;
	}
	*ipp = ip;
	*strp = p;
	return auto_mask;
}

/* Returns 0 on success. Stores IP and mask at provided pointers */
static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
{
	int i;
	unsigned mask;
	char *p;

	i = scan_ip(&str, ipp, '/');
	if (i < 0)
		return i;

	if (*str) {
		/* there is /xxx after dotted-IP address */
		i = bb_strtou(str, &p, 10);
		if (*p == '.') {
			/* 'xxx' itself is dotted-IP mask, parse it */
			/* (return 0 (success) only if it has N.N.N.N form) */
			return scan_ip(&str, maskp, '\0') - 32;
		}
		if (*p)
			return -1;
	}

	if (i > 32)
		return -1;

	if (sizeof(unsigned) == 4 && i == 32) {
		/* mask >>= 32 below may not work */
		mask = 0;
	} else {
		mask = 0xffffffff;
		mask >>= i;
	}
	/* i == 0 -> *maskp = 0x00000000
	 * i == 1 -> *maskp = 0x80000000
	 * i == 4 -> *maskp = 0xf0000000
	 * i == 31 -> *maskp = 0xfffffffe
	 * i == 32 -> *maskp = 0xffffffff */
	*maskp = (uint32_t)(~mask);
	return 0;
}

/*
 * Parse configuration file into in-memory linked list.
 *
 * Any previous IP rules are discarded.
 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
 * are also discarded.  That is, previous settings are retained if flag is
 * SUBDIR_PARSE.
 * Error pages are only parsed on the main config file.
 *
 * path   Path where to look for httpd.conf (without filename).
 * flag   Type of the parse request.
 */
/* flag param: */
enum {
	FIRST_PARSE    = 0, /* path will be "/etc" */
	SIGNALED_PARSE = 1, /* path will be "/etc" */
	SUBDIR_PARSE   = 2, /* path will be derived from URL */
};
static void parse_conf(const char *path, int flag)
{
	/* internally used extra flag state */
	enum { TRY_CURDIR_PARSE = 3 };

	FILE *f;
	const char *filename;
	char buf[160];

	/* discard old rules */
	free_Htaccess_IP_list(&ip_a_d);
	flg_deny_all = 0;
	/* retain previous auth and mime config only for subdir parse */
	if (flag != SUBDIR_PARSE) {
		free_Htaccess_list(&mime_a);
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
		free_Htaccess_list(&g_auth);
#endif
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
		free_Htaccess_list(&script_i);
#endif
	}

	filename = opt_c_configFile;
	if (flag == SUBDIR_PARSE || filename == NULL) {
		filename = alloca(strlen(path) + sizeof(HTTPD_CONF) + 2);
		sprintf((char *)filename, "%s/%s", path, HTTPD_CONF);
	}

	while ((f = fopen_for_read(filename)) == NULL) {
		if (flag >= SUBDIR_PARSE) { /* SUBDIR or TRY_CURDIR */
			/* config file not found, no changes to config */
			return;
		}
		if (flag == FIRST_PARSE) {
			/* -c CONFFILE given, but CONFFILE doesn't exist? */
			if (opt_c_configFile)
				bb_simple_perror_msg_and_die(opt_c_configFile);
			/* else: no -c, thus we looked at /etc/httpd.conf,
			 * and it's not there. try ./httpd.conf: */
		}
		flag = TRY_CURDIR_PARSE;
		filename = HTTPD_CONF;
	}

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	/* in "/file:user:pass" lines, we prepend path in subdirs */
	if (flag != SUBDIR_PARSE)
		path = "";
#endif
	/* The lines can be:
	 *
	 * I:default_index_file
	 * H:http_home
	 * [AD]:IP[/mask]   # allow/deny, * for wildcard
	 * Ennn:error.html  # error page for status nnn
	 * P:/url:[http://]hostname[:port]/new/path # reverse proxy
	 * .ext:mime/type   # mime type
	 * *.php:/path/php  # run xxx.php through an interpreter
	 * /file:user:pass  # username and password
	 */
	while (fgets(buf, sizeof(buf), f) != NULL) {
		unsigned strlen_buf;
		unsigned char ch;
		char *after_colon;

		{ /* remove all whitespace, and # comments */
			char *p, *p0;

			p0 = buf;
			/* skip non-whitespace beginning. Often the whole line
			 * is non-whitespace. We want this case to work fast,
			 * without needless copying, therefore we don't merge
			 * this operation into next while loop. */
			while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
			 && ch != ' ' && ch != '\t'
			) {
				p0++;
			}
			p = p0;
			/* if we enter this loop, we have some whitespace.
			 * discard it */
			while (ch != '\0' && ch != '\n' && ch != '#') {
				if (ch != ' ' && ch != '\t') {
					*p++ = ch;
				}
				ch = *++p0;
			}
			*p = '\0';
			strlen_buf = p - buf;
			if (strlen_buf == 0)
				continue; /* empty line */
		}

		after_colon = strchr(buf, ':');
		/* strange line? */
		if (after_colon == NULL || *++after_colon == '\0')
			goto config_error;

		ch = (buf[0] & ~0x20); /* toupper if it's a letter */

		if (ch == 'I') {
			index_page = xstrdup(after_colon);
			continue;
		}

		/* do not allow jumping around using H in subdir's configs */
		if (flag == FIRST_PARSE && ch == 'H') {
			home_httpd = xstrdup(after_colon);
			xchdir(home_httpd);
			continue;
		}

		if (ch == 'A' || ch == 'D') {
			Htaccess_IP *pip;

			if (*after_colon == '*') {
				if (ch == 'D') {
					/* memorize "deny all" */
					flg_deny_all = 1;
				}
				/* skip assumed "A:*", it is a default anyway */
				continue;
			}
			/* store "allow/deny IP/mask" line */
			pip = xzalloc(sizeof(*pip));
			if (scan_ip_mask(after_colon, &pip->ip, &pip->mask)) {
				/* IP{/mask} syntax error detected, protect all */
				ch = 'D';
				pip->mask = 0;
			}
			pip->allow_deny = ch;
			if (ch == 'D') {
				/* Deny:from_IP - prepend */
				pip->next = ip_a_d;
				ip_a_d = pip;
			} else {
				/* A:from_IP - append (thus all D's precedes A's) */
				Htaccess_IP *prev_IP = ip_a_d;
				if (prev_IP == NULL) {
					ip_a_d = pip;
				} else {
					while (prev_IP->next)
						prev_IP = prev_IP->next;
					prev_IP->next = pip;
				}
			}
			continue;
		}

#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
		if (flag == FIRST_PARSE && ch == 'E') {
			unsigned i;
			int status = atoi(buf + 1); /* error status code */

			if (status < HTTP_CONTINUE) {
				goto config_error;
			}
			/* then error page; find matching status */
			for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
				if (http_response_type[i] == status) {
					/* We chdir to home_httpd, thus no need to
					 * concat_path_file(home_httpd, after_colon)
					 * here */
					http_error_page[i] = xstrdup(after_colon);
					break;
				}
			}
			continue;
		}
#endif

#if ENABLE_FEATURE_HTTPD_PROXY
		if (flag == FIRST_PARSE && ch == 'P') {
			/* P:/url:[http://]hostname[:port]/new/path */
			char *url_from, *host_port, *url_to;
			Htaccess_Proxy *proxy_entry;

			url_from = after_colon;
			host_port = strchr(after_colon, ':');
			if (host_port == NULL) {
				goto config_error;
			}
			*host_port++ = '\0';
			if (strncmp(host_port, "http://", 7) == 0)
				host_port += 7;
			if (*host_port == '\0') {
				goto config_error;
			}
			url_to = strchr(host_port, '/');
			if (url_to == NULL) {
				goto config_error;
			}
			*url_to = '\0';
			proxy_entry = xzalloc(sizeof(*proxy_entry));
			proxy_entry->url_from = xstrdup(url_from);
			proxy_entry->host_port = xstrdup(host_port);
			*url_to = '/';
			proxy_entry->url_to = xstrdup(url_to);
			proxy_entry->next = proxy;
			proxy = proxy_entry;
			continue;
		}
#endif
		/* the rest of directives are non-alphabetic,
		 * must avoid using "toupper'ed" ch */
		ch = buf[0];

		if (ch == '.' /* ".ext:mime/type" */
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
		 || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
#endif
		) {
			char *p;
			Htaccess *cur;

			cur = xzalloc(sizeof(*cur) /* includes space for NUL */ + strlen_buf);
			strcpy(cur->before_colon, buf);
			p = cur->before_colon + (after_colon - buf);
			p[-1] = '\0';
			cur->after_colon = p;
			if (ch == '.') {
				/* .mime line: prepend to mime_a list */
				cur->next = mime_a;
				mime_a = cur;
			}
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
			else {
				/* script interpreter line: prepend to script_i list */
				cur->next = script_i;
				script_i = cur;
			}
#endif
			continue;
		}

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
		if (ch == '/') { /* "/file:user:pass" */
			char *p;
			Htaccess *cur;
			unsigned file_len;

			/* note: path is "" unless we are in SUBDIR parse,
			 * otherwise it does NOT start with "/" */
			cur = xzalloc(sizeof(*cur) /* includes space for NUL */
				+ 1 + strlen(path)
				+ strlen_buf
				);
			/* form "/path/file" */
			sprintf(cur->before_colon, "/%s%.*s",
				path,
				(int) (after_colon - buf - 1), /* includes "/", but not ":" */
				buf);
			/* canonicalize it */
			p = bb_simplify_abs_path_inplace(cur->before_colon);
			file_len = p - cur->before_colon;
			/* add "user:pass" after NUL */
			strcpy(++p, after_colon);
			cur->after_colon = p;

			/* insert cur into g_auth */
			/* g_auth is sorted by decreased filename length */
			{
				Htaccess *auth, **authp;

				authp = &g_auth;
				while ((auth = *authp) != NULL) {
					if (file_len >= strlen(auth->before_colon)) {
						/* insert cur before auth */
						cur->next = auth;
						break;
					}
					authp = &auth->next;
				}
				*authp = cur;
			}
			continue;
		}
#endif /* BASIC_AUTH */

		/* the line is not recognized */
 config_error:
		bb_error_msg("config error '%s' in '%s'", buf, filename);
	 } /* while (fgets) */

	 fclose(f);
}

#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
/*
 * 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().
 *
 * Returns a pointer to the encoded string (malloced).
 */
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 = xmalloc(len * 6 + 1);
	char *p = out;
	char ch;

	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          /* FEATURE_HTTPD_ENCODE_URL_STR */

/*
 * 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 xstrdup() 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.
 *
 * string    The first string to decode.
 * option_d  1 if called for httpd -d
 *
 * Returns a pointer to the decoded string (same as input).
 */
static unsigned hex_to_bin(unsigned char c)
{
	unsigned v;

	v = c - '0';
	if (v <= 9)
		return v;
	/* c | 0x20: letters to lower case, non-letters
	 * to (potentially different) non-letters */
	v = (unsigned)(c | 0x20) - 'a';
	if (v <= 5)
		return v + 10;
	return ~0;
}
/* For testing:
void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
*/
static char *decodeString(char *orig, int option_d)
{
	/* note that decoded string is always shorter than original */
	char *string = orig;
	char *ptr = string;
	char c;

	while ((c = *ptr++) != '\0') {
		unsigned v;

		if (option_d && c == '+') {
			*string++ = ' ';
			continue;
		}
		if (c != '%') {
			*string++ = c;
			continue;
		}
		v = hex_to_bin(ptr[0]);
		if (v > 15) {
 bad_hex:
			if (!option_d)
				return NULL;
			*string++ = '%';
			continue;
		}
		v = (v * 16) | hex_to_bin(ptr[1]);
		if (v > 255)
			goto bad_hex;
		if (!option_d && (v == '/' || v == '\0')) {
			/* caller takes it as indication of invalid
			 * (dangerous wrt exploits) chars */
			return orig + 1;
		}
		*string++ = v;
		ptr += 2;
	}
	*string = '\0';
	return orig;
}

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
/*
 * Decode a base64 data stream as per rfc1521.
 * Note that the rfc states that non 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: a pointer to a base64 encoded string.
 * Decoded data is stored in-place.
 */
static void decodeBase64(char *Data)
{
	const unsigned char *in = (const unsigned char *)Data;
	/* The decoded size will be at most 3/4 the size of the encoded */
	unsigned ch = 0;
	int i = 0;

	while (*in) {
		int t = *in++;

		if (t >= '0' && t <= '9')
			t = t - '0' + 52;
		else if (t >= 'A' && t <= 'Z')
			t = t - 'A';
		else if (t >= 'a' && t <= 'z')
			t = t - 'a' + 26;
		else if (t == '+')
			t = 62;
		else if (t == '/')
			t = 63;
		else if (t == '=')
			t = 0;
		else
			continue;

		ch = (ch << 6) | t;
		i++;
		if (i == 4) {
			*Data++ = (char) (ch >> 16);
			*Data++ = (char) (ch >> 8);
			*Data++ = (char) ch;
			i = 0;
		}
	}
	*Data = '\0';
}
#endif

/*
 * Create a listen server socket on the designated port.
 */
static int openServer(void)
{
	unsigned n = bb_strtou(bind_addr_or_port, NULL, 10);
	if (!errno && n && n <= 0xffff)
		n = create_and_bind_stream_or_die(NULL, n);
	else
		n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
	xlisten(n, 9);
	return n;
}

/*
 * Log the connection closure and exit.
 */
static void log_and_exit(void) NORETURN;
static void log_and_exit(void)
{
	/* Paranoia. IE said to be buggy. It may send some extra data
	 * or be confused by us just exiting without SHUT_WR. Oh well. */
	shutdown(1, SHUT_WR);
	/* Why??
	(this also messes up stdin when user runs httpd -i from terminal)
	ndelay_on(0);
	while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
		continue;
	*/

	if (verbose > 2)
		bb_error_msg("closed");
	_exit(xfunc_error_retval);
}

/*
 * 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.
 * responseNum - the result code to send.
 */
static void send_headers(int responseNum)
{
	static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";

	const char *responseString = "";
	const char *infoString = NULL;
	const char *mime_type;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
	const char *error_page = NULL;
#endif
	unsigned i;
	time_t timer = time(NULL);
	char tmp_str[80];
	int len;

	for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
		if (http_response_type[i] == responseNum) {
			responseString = http_response[i].name;
			infoString = http_response[i].info;
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
			error_page = http_error_page[i];
#endif
			break;
		}
	}
	/* error message is HTML */
	mime_type = responseNum == HTTP_OK ?
				found_mime_type : "text/html";

	if (verbose)
		bb_error_msg("response:%u", responseNum);

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

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	if (responseNum == HTTP_UNAUTHORIZED) {
		len += sprintf(iobuf + len,
				"WWW-Authenticate: Basic realm=\"%s\"\r\n",
				g_realm);
	}
#endif
	if (responseNum == HTTP_MOVED_TEMPORARILY) {
		len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
				found_moved_temporarily,
				(g_query ? "?" : ""),
				(g_query ? g_query : ""));
	}

#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
	if (error_page && access(error_page, R_OK) == 0) {
		strcat(iobuf, "\r\n");
		len += 2;

		if (DEBUG)
			fprintf(stderr, "headers: '%s'\n", iobuf);
		full_write(STDOUT_FILENO, iobuf, len);
		if (DEBUG)
			fprintf(stderr, "writing error page: '%s'\n", error_page);
		return send_file_and_exit(error_page, SEND_BODY);
	}
#endif

	if (file_size != -1) {    /* file */
		strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
#if ENABLE_FEATURE_HTTPD_RANGES
		if (responseNum == HTTP_PARTIAL_CONTENT) {
			len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"d-%"OFF_FMT"d/%"OFF_FMT"d\r\n",
					range_start,
					range_end,
					file_size);
			file_size = range_end - range_start + 1;
		}
#endif
		len += sprintf(iobuf + len,
#if ENABLE_FEATURE_HTTPD_RANGES
			"Accept-Ranges: bytes\r\n"
#endif
			"Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
				tmp_str,
				"Content-length:",
				file_size
		);
	}
	iobuf[len++] = '\r';
	iobuf[len++] = '\n';
	if (infoString) {
		len += sprintf(iobuf + len,
				"<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
				"<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
				responseNum, responseString,
				responseNum, responseString, infoString);
	}
	if (DEBUG)
		fprintf(stderr, "headers: '%s'\n", iobuf);
	if (full_write(STDOUT_FILENO, iobuf, len) != len) {
		if (verbose > 1)
			bb_perror_msg("error");
		log_and_exit();
	}
}

static void send_headers_and_exit(int responseNum) NORETURN;
static void send_headers_and_exit(int responseNum)
{
	send_headers(responseNum);
	log_and_exit();
}

/*
 * Read from the socket until '\n' or EOF. '\r' chars are removed.
 * '\n' is replaced with NUL.
 * Return number of characters read or 0 if nothing is read
 * ('\r' and '\n' are not counted).
 * Data is returned in iobuf.
 */
static int get_line(void)
{
	int count = 0;
	char c;

	alarm(HEADER_READ_TIMEOUT);
	while (1) {
		if (hdr_cnt <= 0) {
			hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
			if (hdr_cnt <= 0)
				break;
			hdr_ptr = hdr_buf;
		}
		iobuf[count] = c = *hdr_ptr++;
		hdr_cnt--;

		if (c == '\r')
			continue;
		if (c == '\n') {
			iobuf[count] = '\0';
			break;
		}
		if (count < (IOBUF_SIZE - 1))      /* check overflow */
			count++;
	}
	return count;
}

#if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY

/* gcc 4.2.1 fares better with NOINLINE */
static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) NORETURN;
static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
{
	enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
	struct pollfd pfd[3];
	int out_cnt; /* we buffer a bit of initial CGI output */
	int count;

	/* iobuf is used for CGI -> network data,
	 * hdr_buf is for network -> CGI data (POSTDATA) */

	/* If CGI dies, we still want to correctly finish reading its output
	 * and send it to the peer. So please no SIGPIPEs! */
	signal(SIGPIPE, SIG_IGN);

	// We inconsistently handle a case when more POSTDATA from network
	// is coming than we expected. We may give *some part* of that
	// extra data to CGI.

	//if (hdr_cnt > post_len) {
	//	/* We got more POSTDATA from network than we expected */
	//	hdr_cnt = post_len;
	//}
	post_len -= hdr_cnt;
	/* post_len - number of POST bytes not yet read from network */

	/* NB: breaking out of this loop jumps to log_and_exit() */
	out_cnt = 0;
	while (1) {
		memset(pfd, 0, sizeof(pfd));

		pfd[FROM_CGI].fd = fromCgi_rd;
		pfd[FROM_CGI].events = POLLIN;

		if (toCgi_wr) {
			pfd[TO_CGI].fd = toCgi_wr;
			if (hdr_cnt > 0) {
				pfd[TO_CGI].events = POLLOUT;
			} else if (post_len > 0) {
				pfd[0].events = POLLIN;
			} else {
				/* post_len <= 0 && hdr_cnt <= 0:
				 * no more POST data to CGI,
				 * let CGI see EOF on CGI's stdin */
				close(toCgi_wr);
				toCgi_wr = 0;
			}
		}

		/* Now wait on the set of sockets */
		count = safe_poll(pfd, 3, -1);
		if (count <= 0) {
#if 0
			if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
				/* Weird. CGI didn't exit and no fd's
				 * are ready, yet poll returned?! */
				continue;
			}
			if (DEBUG && WIFEXITED(status))
				bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
			if (DEBUG && WIFSIGNALED(status))
				bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
#endif
			break;
		}

		if (pfd[TO_CGI].revents) {
			/* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
			/* Have data from peer and can write to CGI */
			count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
			/* Doesn't happen, we dont use nonblocking IO here
			 *if (count < 0 && errno == EAGAIN) {
			 *	...
			 *} else */
			if (count > 0) {
				hdr_ptr += count;
				hdr_cnt -= count;
			} else {
				/* EOF/broken pipe to CGI, stop piping POST data */
				hdr_cnt = post_len = 0;
			}
		}

		if (pfd[0].revents) {
			/* post_len > 0 && hdr_cnt == 0 here */
			/* We expect data, prev data portion is eaten by CGI
			 * and there *is* data to read from the peer
			 * (POSTDATA) */
			//count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
			//count = safe_read(STDIN_FILENO, hdr_buf, count);
			count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
			if (count > 0) {
				hdr_cnt = count;
				hdr_ptr = hdr_buf;
				post_len -= count;
			} else {
				/* no more POST data can be read */
				post_len = 0;
			}
		}

		if (pfd[FROM_CGI].revents) {
			/* There is something to read from CGI */
			char *rbuf = iobuf;

			/* Are we still buffering CGI output? */
			if (out_cnt >= 0) {
				/* HTTP_200[] has single "\r\n" at the end.
				 * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
				 * CGI scripts MUST send their own header terminated by
				 * empty line, then data. That's why we have only one
				 * <cr><lf> pair here. We will output "200 OK" line
				 * if needed, but CGI still has to provide blank line
				 * between header and body */

				/* Must use safe_read, not full_read, because
				 * CGI may output a few first bytes and then wait
				 * for POSTDATA without closing stdout.
				 * With full_read we may wait here forever. */
				count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
				if (count <= 0) {
					/* eof (or error) and there was no "HTTP",
					 * so write it, then write received data */
					if (out_cnt) {
						full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
						full_write(STDOUT_FILENO, rbuf, out_cnt);
					}
					break; /* CGI stdout is closed, exiting */
				}
				out_cnt += count;
				count = 0;
				/* "Status" header format is: "Status: 302 Redirected\r\n" */
				if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
					/* send "HTTP/1.0 " */
					if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
						break;
					rbuf += 8; /* skip "Status: " */
					count = out_cnt - 8;
					out_cnt = -1; /* buffering off */
				} else if (out_cnt >= 4) {
					/* Did CGI add "HTTP"? */
					if (memcmp(rbuf, HTTP_200, 4) != 0) {
						/* there is no "HTTP", do it ourself */
						if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
							break;
					}
					/* Commented out:
					if (!strstr(rbuf, "ontent-")) {
						full_write(s, "Content-type: text/plain\r\n\r\n", 28);
					}
					 * Counter-example of valid CGI without Content-type:
					 * echo -en "HTTP/1.0 302 Found\r\n"
					 * echo -en "Location: http://www.busybox.net\r\n"
					 * echo -en "\r\n"
					 */
					count = out_cnt;
					out_cnt = -1; /* buffering off */
				}
			} else {
				count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
				if (count <= 0)
					break;  /* eof (or error) */
			}
			if (full_write(STDOUT_FILENO, rbuf, count) != count)
				break;
			if (DEBUG)
				fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
		} /* if (pfd[FROM_CGI].revents) */
	} /* while (1) */
	log_and_exit();
}
#endif

#if ENABLE_FEATURE_HTTPD_CGI

static void setenv1(const char *name, const char *value)
{
	setenv(name, value ? value : "", 1);
}

/*
 * Spawn CGI script, forward CGI's stdin/out <=> network
 *
 * 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 /).
 * int post_len                 Length of the POST body.
 * const char *cookie           For set HTTP_COOKIE.
 * const char *content_type     For set CONTENT_TYPE.
 */
static void send_cgi_and_exit(
		const char *url,
		const char *request,
		int post_len,
		const char *cookie,
		const char *content_type) NORETURN;
static void send_cgi_and_exit(
		const char *url,
		const char *request,
		int post_len,
		const char *cookie,
		const char *content_type)
{
	struct fd_pair fromCgi;  /* CGI -> httpd pipe */
	struct fd_pair toCgi;    /* httpd -> CGI pipe */
	char *script;
	int pid;

	/* Make a copy. NB: caller guarantees:
	 * url[0] == '/', url[1] != '/' */
	url = xstrdup(url);

	/*
	 * We are mucking with environment _first_ and then vfork/exec,
	 * this allows us to use vfork safely. Parent doesn't care about
	 * these environment changes anyway.
	 */

	/* Check for [dirs/]script.cgi/PATH_INFO */
	script = (char*)url;
	while ((script = strchr(script + 1, '/')) != NULL) {
		struct stat sb;

		*script = '\0';
		if (!is_directory(url + 1, 1, &sb)) {
			/* not directory, found script.cgi/PATH_INFO */
			*script = '/';
			break;
		}
		*script = '/'; /* is directory, find next '/' */
	}
	setenv1("PATH_INFO", script);   /* set to /PATH_INFO or "" */
	setenv1("REQUEST_METHOD", request);
	if (g_query) {
		putenv(xasprintf("%s=%s?%s", "REQUEST_URI", url, g_query));
	} else {
		setenv1("REQUEST_URI", url);
	}
	if (script != NULL)
		*script = '\0';         /* cut off /PATH_INFO */

	/* SCRIPT_FILENAME is required by PHP in CGI mode */
	if (home_httpd[0] == '/') {
		char *fullpath = concat_path_file(home_httpd, url);
		setenv1("SCRIPT_FILENAME", fullpath);
	}
	/* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
	setenv1("SCRIPT_NAME", url);
	/* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
	 * QUERY_STRING: The information which follows the ? in the URL
	 * which referenced this script. This is the query information.
	 * It should not be decoded in any fashion. This variable
	 * should always be set when there is query information,
	 * regardless of command line decoding. */
	/* (Older versions of bbox seem to do some decoding) */
	setenv1("QUERY_STRING", g_query);
	putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
	putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
	putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
	/* Having _separate_ variables for IP and port defeats
	 * the purpose of having socket abstraction. Which "port"
	 * are you using on Unix domain socket?
	 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
	 * Oh well... */
	{
		char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
		char *cp = strrchr(p, ':');
		if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
			cp = NULL;
		if (cp) *cp = '\0'; /* delete :PORT */
		setenv1("REMOTE_ADDR", p);
		if (cp) {
			*cp = ':';
#if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
			setenv1("REMOTE_PORT", cp + 1);
#endif
		}
	}
	setenv1("HTTP_USER_AGENT", user_agent);
	if (http_accept)
		setenv1("HTTP_ACCEPT", http_accept);
	if (http_accept_language)
		setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language);
	if (post_len)
		putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
	if (cookie)
		setenv1("HTTP_COOKIE", cookie);
	if (content_type)
		setenv1("CONTENT_TYPE", content_type);
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	if (remoteuser) {
		setenv1("REMOTE_USER", remoteuser);
		putenv((char*)"AUTH_TYPE=Basic");
	}
#endif
	if (referer)
		setenv1("HTTP_REFERER", referer);
	setenv1("HTTP_HOST", host); /* set to "" if NULL */
	/* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
	 * just run "env SERVER_NAME=xyz httpd ..." instead */

	xpiped_pair(fromCgi);
	xpiped_pair(toCgi);

	pid = vfork();
	if (pid < 0) {
		/* TODO: log perror? */
		log_and_exit();
	}

	if (!pid) {
		/* Child process */
		char *argv[3];

		xfunc_error_retval = 242;

		/* NB: close _first_, then move fds! */
		close(toCgi.wr);
		close(fromCgi.rd);
		xmove_fd(toCgi.rd, 0);  /* replace stdin with the pipe */
		xmove_fd(fromCgi.wr, 1);  /* replace stdout with the pipe */
		/* User seeing stderr output can be a security problem.
		 * If CGI really wants that, it can always do dup itself. */
		/* dup2(1, 2); */

		/* Chdiring to script's dir */
		script = strrchr(url, '/');
		if (script != url) { /* paranoia */
			*script = '\0';
			if (chdir(url + 1) != 0) {
				bb_perror_msg("chdir %s", url + 1);
				goto error_execing_cgi;
			}
			// not needed: *script = '/';
		}
		script++;

		/* set argv[0] to name without path */
		argv[0] = script;
		argv[1] = NULL;

#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
		{
			char *suffix = strrchr(script, '.');

			if (suffix) {
				Htaccess *cur;
				for (cur = script_i; cur; cur = cur->next) {
					if (strcmp(cur->before_colon + 1, suffix) == 0) {
						/* found interpreter name */
						argv[0] = cur->after_colon;
						argv[1] = script;
						argv[2] = NULL;
						break;
					}
				}
			}
		}
#endif
		/* restore default signal dispositions for CGI process */
		bb_signals(0
			| (1 << SIGCHLD)
			| (1 << SIGPIPE)
			| (1 << SIGHUP)
			, SIG_DFL);

		/* _NOT_ execvp. We do not search PATH. argv[0] is a filename
		 * without any dir components and will only match a file
		 * in the current directory */
		execv(argv[0], argv);
		if (verbose)
			bb_perror_msg("exec %s", argv[0]);
 error_execing_cgi:
		/* send to stdout
		 * (we are CGI here, our stdout is pumped to the net) */
		send_headers_and_exit(HTTP_NOT_FOUND);
	} /* end child */

	/* Parent process */

	/* Restore variables possibly changed by child */
	xfunc_error_retval = 0;

	/* Pump data */
	close(fromCgi.wr);
	close(toCgi.rd);
	cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
}

#endif          /* FEATURE_HTTPD_CGI */

/*
 * Send a file response to a HTTP request, and exit
 *
 * Parameters:
 * const char *url  The requested URL (with leading /).
 * what             What to send (headers/body/both).
 */
static NOINLINE void send_file_and_exit(const char *url, int what)
{
	static const char *const suffixTable[] = {
	/* Warning: shorter equivalent 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
		NULL
	};

	char *suffix;
	int fd;
	const char *const *table;
	const char *try_suffix;
	ssize_t count;

	fd = open(url, O_RDONLY);
	if (fd < 0) {
		if (DEBUG)
			bb_perror_msg("can't open '%s'", url);
		/* Error pages are sent by using send_file_and_exit(SEND_BODY).
		 * IOW: it is unsafe to call send_headers_and_exit
		 * if what is SEND_BODY! Can recurse! */
		if (what != SEND_BODY)
			send_headers_and_exit(HTTP_NOT_FOUND);
		log_and_exit();
	}
	/* If you want to know about EPIPE below
	 * (happens if you abort downloads from local httpd): */
	signal(SIGPIPE, SIG_IGN);

	suffix = strrchr(url, '.');

	/* If not found, set default as "application/octet-stream";  */
	found_mime_type = "application/octet-stream";
	if (suffix) {
		Htaccess *cur;
		for (table = suffixTable; *table; table += 2) {
			try_suffix = strstr(table[0], suffix);
			if (try_suffix) {
				try_suffix += strlen(suffix);
				if (*try_suffix == '\0' || *try_suffix == '.') {
					found_mime_type = table[1];
					break;
				}
			}
		}
		for (cur = mime_a; cur; cur = cur->next) {
			if (strcmp(cur->before_colon, suffix) == 0) {
				found_mime_type = cur->after_colon;
				break;
			}
		}
	}

	if (DEBUG)
		bb_error_msg("sending file '%s' content-type: %s",
			url, found_mime_type);

#if ENABLE_FEATURE_HTTPD_RANGES
	if (what == SEND_BODY)
		range_start = 0; /* err pages and ranges don't mix */
	range_len = MAXINT(off_t);
	if (range_start) {
		if (!range_end) {
			range_end = file_size - 1;
		}
		if (range_end < range_start
		 || lseek(fd, range_start, SEEK_SET) != range_start
		) {
			lseek(fd, 0, SEEK_SET);
			range_start = 0;
		} else {
			range_len = range_end - range_start + 1;
			send_headers(HTTP_PARTIAL_CONTENT);
			what = SEND_BODY;
		}
	}
#endif
	if (what & SEND_HEADERS)
		send_headers(HTTP_OK);
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
	{
		off_t offset = range_start;
		while (1) {
			/* sz is rounded down to 64k */
			ssize_t sz = MAXINT(ssize_t) - 0xffff;
			IF_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
			count = sendfile(STDOUT_FILENO, fd, &offset, sz);
			if (count < 0) {
				if (offset == range_start)
					break; /* fall back to read/write loop */
				goto fin;
			}
			IF_FEATURE_HTTPD_RANGES(range_len -= sz;)
			if (count == 0 || range_len == 0)
				log_and_exit();
		}
	}
#endif
	while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
		ssize_t n;
		IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
		n = full_write(STDOUT_FILENO, iobuf, count);
		if (count != n)
			break;
		IF_FEATURE_HTTPD_RANGES(range_len -= count;)
		if (range_len == 0)
			break;
	}
	if (count < 0) {
 IF_FEATURE_HTTPD_USE_SENDFILE(fin:)
		if (verbose > 1)
			bb_perror_msg("error");
	}
	log_and_exit();
}

static int checkPermIP(void)
{
	Htaccess_IP *cur;

	for (cur = ip_a_d; cur; cur = cur->next) {
#if DEBUG
		fprintf(stderr,
			"checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
			rmt_ip_str,
			(unsigned char)(cur->ip >> 24),
			(unsigned char)(cur->ip >> 16),
			(unsigned char)(cur->ip >> 8),
			(unsigned char)(cur->ip),
			(unsigned char)(cur->mask >> 24),
			(unsigned char)(cur->mask >> 16),
			(unsigned char)(cur->mask >> 8),
			(unsigned char)(cur->mask)
		);
#endif
		if ((rmt_ip & cur->mask) == cur->ip)
			return (cur->allow_deny == 'A'); /* A -> 1 */
	}

	return !flg_deny_all; /* depends on whether we saw "D:*" */
}

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
/*
 * Config file entries are of the form "/<path>:<user>:<passwd>".
 * If config file has no prefix match for path, access is allowed.
 *
 * path                 The file path
 * user_and_passwd      "user:passwd" to validate
 *
 * Returns 1 if user_and_passwd is OK.
 */
static int check_user_passwd(const char *path, const char *user_and_passwd)
{
	Htaccess *cur;
	const char *prev = NULL;

	for (cur = g_auth; cur; cur = cur->next) {
		const char *dir_prefix;
		size_t len;

		dir_prefix = cur->before_colon;

		/* WHY? */
		/* If already saw a match, don't accept other different matches */
		if (prev && strcmp(prev, dir_prefix) != 0)
			continue;

		if (DEBUG)
			fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);

		/* If it's not a prefix match, continue searching */
		len = strlen(dir_prefix);
		if (len != 1 /* dir_prefix "/" matches all, don't need to check */
		 && (strncmp(dir_prefix, path, len) != 0
		    || (path[len] != '/' && path[len] != '\0'))
		) {
			continue;
		}

		/* Path match found */
		prev = dir_prefix;

		if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
			char *md5_passwd;

			md5_passwd = strchr(cur->after_colon, ':');
			if (md5_passwd && md5_passwd[1] == '$' && md5_passwd[2] == '1'
			 && md5_passwd[3] == '$' && md5_passwd[4]
			) {
				char *encrypted;
				int r, user_len_p1;

				md5_passwd++;
				user_len_p1 = md5_passwd - cur->after_colon;
				/* comparing "user:" */
				if (strncmp(cur->after_colon, user_and_passwd, user_len_p1) != 0) {
					continue;
				}

				encrypted = pw_encrypt(
					user_and_passwd + user_len_p1 /* cleartext pwd from user */,
					md5_passwd /*salt */, 1 /* cleanup */);
				r = strcmp(encrypted, md5_passwd);
				free(encrypted);
				if (r == 0)
					goto set_remoteuser_var; /* Ok */
				continue;
			}
		}

		/* Comparing plaintext "user:pass" in one go */
		if (strcmp(cur->after_colon, user_and_passwd) == 0) {
 set_remoteuser_var:
			remoteuser = xstrndup(user_and_passwd,
					strchrnul(user_and_passwd, ':') - user_and_passwd);
			return 1; /* Ok */
		}
	} /* for */

	/* 0(bad) if prev is set: matches were found but passwd was wrong */
	return (prev == NULL);
}
#endif  /* FEATURE_HTTPD_BASIC_AUTH */

#if ENABLE_FEATURE_HTTPD_PROXY
static Htaccess_Proxy *find_proxy_entry(const char *url)
{
	Htaccess_Proxy *p;
	for (p = proxy; p; p = p->next) {
		if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
			return p;
	}
	return NULL;
}
#endif

/*
 * Handle timeouts
 */
static void send_REQUEST_TIMEOUT_and_exit(int sig) NORETURN;
static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM)
{
	send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
}

/*
 * Handle an incoming http request and exit.
 */
static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) NORETURN;
static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
{
	static const char request_GET[] ALIGN1 = "GET";
	struct stat sb;
	char *urlcopy;
	char *urlp;
	char *tptr;
#if ENABLE_FEATURE_HTTPD_CGI
	static const char request_HEAD[] ALIGN1 = "HEAD";
	const char *prequest;
	char *cookie = NULL;
	char *content_type = NULL;
	unsigned long length = 0;
#elif ENABLE_FEATURE_HTTPD_PROXY
#define prequest request_GET
	unsigned long length = 0;
#endif
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	smallint authorized = -1;
#endif
	smallint ip_allowed;
	char http_major_version;
#if ENABLE_FEATURE_HTTPD_PROXY
	char http_minor_version;
	char *header_buf = header_buf; /* for gcc */
	char *header_ptr = header_ptr;
	Htaccess_Proxy *proxy_entry;
#endif

	/* Allocation of iobuf is postponed until now
	 * (IOW, server process doesn't need to waste 8k) */
	iobuf = xmalloc(IOBUF_SIZE);

	rmt_ip = 0;
	if (fromAddr->u.sa.sa_family == AF_INET) {
		rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
	}
#if ENABLE_FEATURE_IPV6
	if (fromAddr->u.sa.sa_family == AF_INET6
	 && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
	 && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
	 && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
		rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
#endif
	if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
		/* NB: can be NULL (user runs httpd -i by hand?) */
		rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
	}
	if (verbose) {
		/* this trick makes -v logging much simpler */
		if (rmt_ip_str)
			applet_name = rmt_ip_str;
		if (verbose > 2)
			bb_error_msg("connected");
	}

	/* Install timeout handler. get_line() needs it. */
	signal(SIGALRM, send_REQUEST_TIMEOUT_and_exit);

	if (!get_line()) /* EOF or error or empty line */
		send_headers_and_exit(HTTP_BAD_REQUEST);

	/* Determine type of request (GET/POST) */
	urlp = strpbrk(iobuf, " \t");
	if (urlp == NULL)
		send_headers_and_exit(HTTP_BAD_REQUEST);
	*urlp++ = '\0';
#if ENABLE_FEATURE_HTTPD_CGI
	prequest = request_GET;
	if (strcasecmp(iobuf, prequest) != 0) {
		prequest = request_HEAD;
		if (strcasecmp(iobuf, prequest) != 0) {
			prequest = "POST";
			if (strcasecmp(iobuf, prequest) != 0)
				send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
		}
	}
#else
	if (strcasecmp(iobuf, request_GET) != 0)
		send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
#endif
	urlp = skip_whitespace(urlp);
	if (urlp[0] != '/')
		send_headers_and_exit(HTTP_BAD_REQUEST);

	/* Find end of URL and parse HTTP version, if any */
	http_major_version = '0';
	IF_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
	tptr = strchrnul(urlp, ' ');
	/* Is it " HTTP/"? */
	if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
		http_major_version = tptr[6];
		IF_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
	}
	*tptr = '\0';

	/* Copy URL from after "GET "/"POST " to stack-allocated char[] */
	urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
	/*if (urlcopy == NULL)
	 *	send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
	strcpy(urlcopy, urlp);
	/* NB: urlcopy ptr is never changed after this */

	/* Extract url args if present */
	g_query = NULL;
	tptr = strchr(urlcopy, '?');
	if (tptr) {
		*tptr++ = '\0';
		g_query = tptr;
	}

	/* Decode URL escape sequences */
	tptr = decodeString(urlcopy, 0);
	if (tptr == NULL)
		send_headers_and_exit(HTTP_BAD_REQUEST);
	if (tptr == urlcopy + 1) {
		/* '/' or NUL is encoded */
		send_headers_and_exit(HTTP_NOT_FOUND);
	}

	/* Canonicalize path */
	/* Algorithm stolen from libbb bb_simplify_path(),
	 * but don't strdup, retain trailing slash, protect root */
	urlp = tptr = urlcopy;
	do {
		if (*urlp == '/') {
			/* skip duplicate (or initial) slash */
			if (*tptr == '/') {
				continue;
			}
			if (*tptr == '.') {
				/* skip extra "/./" */
				if (tptr[1] == '/' || !tptr[1]) {
					continue;
				}
				/* "..": be careful */
				if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
					++tptr;
					if (urlp == urlcopy) /* protect root */
						send_headers_and_exit(HTTP_BAD_REQUEST);
					while (*--urlp != '/') /* omit previous dir */;
						continue;
				}
			}
		}
		*++urlp = *tptr;
	} while (*++tptr);
	*++urlp = '\0';       /* terminate after last character */

	/* If URL is a directory, add '/' */
	if (urlp[-1] != '/') {
		if (is_directory(urlcopy + 1, 1, &sb)) {
			found_moved_temporarily = urlcopy;
		}
	}

	/* Log it */
	if (verbose > 1)
		bb_error_msg("url:%s", urlcopy);

	tptr = urlcopy;
	ip_allowed = checkPermIP();
	while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
		/* have path1/path2 */
		*tptr = '\0';
		if (is_directory(urlcopy + 1, 1, &sb)) {
			/* may have subdir config */
			parse_conf(urlcopy + 1, SUBDIR_PARSE);
			ip_allowed = checkPermIP();
		}
		*tptr = '/';
	}

#if ENABLE_FEATURE_HTTPD_PROXY
	proxy_entry = find_proxy_entry(urlcopy);
	if (proxy_entry)
		header_buf = header_ptr = xmalloc(IOBUF_SIZE);
#endif

	if (http_major_version >= '0') {
		/* Request was with "... HTTP/nXXX", and n >= 0 */

		/* Read until blank line for HTTP version specified, else parse immediate */
		while (1) {
			if (!get_line())
				break; /* EOF or error or empty line */
			if (DEBUG)
				bb_error_msg("header: '%s'", iobuf);

#if ENABLE_FEATURE_HTTPD_PROXY
			/* We need 2 more bytes for yet another "\r\n" -
			 * see near fdprintf(proxy_fd...) further below */
			if (proxy_entry && (header_ptr - header_buf) < IOBUF_SIZE - 2) {
				int len = strlen(iobuf);
				if (len > IOBUF_SIZE - (header_ptr - header_buf) - 4)
					len = IOBUF_SIZE - (header_ptr - header_buf) - 4;
				memcpy(header_ptr, iobuf, len);
				header_ptr += len;
				header_ptr[0] = '\r';
				header_ptr[1] = '\n';
				header_ptr += 2;
			}
#endif

#if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
			/* Try and do our best to parse more lines */
			if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
				/* extra read only for POST */
				if (prequest != request_GET
#if ENABLE_FEATURE_HTTPD_CGI
				 && prequest != request_HEAD
#endif
				) {
					tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
					if (!tptr[0])
						send_headers_and_exit(HTTP_BAD_REQUEST);
					/* not using strtoul: it ignores leading minus! */
					length = bb_strtou(tptr, NULL, 10);
					/* length is "ulong", but we need to pass it to int later */
					if (errno || length > INT_MAX)
						send_headers_and_exit(HTTP_BAD_REQUEST);
				}
			}
#endif
#if ENABLE_FEATURE_HTTPD_CGI
			else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
				cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
			} else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
				content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
			} else if (STRNCASECMP(iobuf, "Referer:") == 0) {
				referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
			} else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
				user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
			} else if (STRNCASECMP(iobuf, "Host:") == 0) {
				host = xstrdup(skip_whitespace(iobuf + sizeof("Host:")-1));
			} else if (STRNCASECMP(iobuf, "Accept:") == 0) {
				http_accept = xstrdup(skip_whitespace(iobuf + sizeof("Accept:")-1));
			} else if (STRNCASECMP(iobuf, "Accept-Language:") == 0) {
				http_accept_language = xstrdup(skip_whitespace(iobuf + sizeof("Accept-Language:")-1));
			}
#endif
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
			if (STRNCASECMP(iobuf, "Authorization:") == 0) {
				/* We only allow Basic credentials.
				 * It shows up as "Authorization: Basic <user>:<passwd>" where
				 * "<user>:<passwd>" is base64 encoded.
				 */
				tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
				if (STRNCASECMP(tptr, "Basic") != 0)
					continue;
				tptr += sizeof("Basic")-1;
				/* decodeBase64() skips whitespace itself */
				decodeBase64(tptr);
				authorized = check_user_passwd(urlcopy, tptr);
			}
#endif
#if ENABLE_FEATURE_HTTPD_RANGES
			if (STRNCASECMP(iobuf, "Range:") == 0) {
				/* We know only bytes=NNN-[MMM] */
				char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
				if (strncmp(s, "bytes=", 6) == 0) {
					s += sizeof("bytes=")-1;
					range_start = BB_STRTOOFF(s, &s, 10);
					if (s[0] != '-' || range_start < 0) {
						range_start = 0;
					} else if (s[1]) {
						range_end = BB_STRTOOFF(s+1, NULL, 10);
						if (errno || range_end < range_start)
							range_start = 0;
					}
				}
			}
#endif
		} /* while extra header reading */
	}

	/* We are done reading headers, disable peer timeout */
	alarm(0);

	if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
		/* protect listing [/path]/httpd.conf or IP deny */
		send_headers_and_exit(HTTP_FORBIDDEN);
	}

#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
	/* Case: no "Authorization:" was seen, but page does require passwd.
	 * Check that with dummy user:pass */
	if (authorized < 0)
		authorized = check_user_passwd(urlcopy, ":");
	if (!authorized)
		send_headers_and_exit(HTTP_UNAUTHORIZED);
#endif

	if (found_moved_temporarily) {
		send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
	}

#if ENABLE_FEATURE_HTTPD_PROXY
	if (proxy_entry != NULL) {
		int proxy_fd;
		len_and_sockaddr *lsa;

		proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
		if (proxy_fd < 0)
			send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
		lsa = host2sockaddr(proxy_entry->host_port, 80);
		if (lsa == NULL)
			send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
		if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
			send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
		fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
				prequest, /* GET or POST */
				proxy_entry->url_to, /* url part 1 */
				urlcopy + strlen(proxy_entry->url_from), /* url part 2 */
				(g_query ? "?" : ""), /* "?" (maybe) */
				(g_query ? g_query : ""), /* query string (maybe) */
				http_major_version, http_minor_version);
		header_ptr[0] = '\r';
		header_ptr[1] = '\n';
		header_ptr += 2;
		write(proxy_fd, header_buf, header_ptr - header_buf);
		free(header_buf); /* on the order of 8k, free it */
		/* cgi_io_loop_and_exit needs to have two distinct fds */
		cgi_io_loop_and_exit(proxy_fd, dup(proxy_fd), length);
	}
#endif

	tptr = urlcopy + 1;      /* skip first '/' */

#if ENABLE_FEATURE_HTTPD_CGI
	if (strncmp(tptr, "cgi-bin/", 8) == 0) {
		if (tptr[8] == '\0') {
			/* protect listing "cgi-bin/" */
			send_headers_and_exit(HTTP_FORBIDDEN);
		}
		send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
	}
#endif

	if (urlp[-1] == '/')
		strcpy(urlp, index_page);
	if (stat(tptr, &sb) == 0) {
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
		char *suffix = strrchr(tptr, '.');
		if (suffix) {
			Htaccess *cur;
			for (cur = script_i; cur; cur = cur->next) {
				if (strcmp(cur->before_colon + 1, suffix) == 0) {
					send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
				}
			}
		}
#endif
		file_size = sb.st_size;
		last_mod = sb.st_mtime;
	}
#if ENABLE_FEATURE_HTTPD_CGI
	else if (urlp[-1] == '/') {
		/* It's a dir URL and there is no index.html
		 * Try cgi-bin/index.cgi */
		if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
			urlp[0] = '\0';
			g_query = urlcopy;
			send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
		}
	}
	/* else fall through to send_file, it errors out if open fails: */

	if (prequest != request_GET && prequest != request_HEAD) {
		/* POST for files does not make sense */
		send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
	}
	send_file_and_exit(tptr,
		(prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
	);
#else
	send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
#endif
}

/*
 * The main http server function.
 * Given a socket, listen for new connections and farm out
 * the processing as a [v]forked process.
 * Never returns.
 */
#if BB_MMU
static void mini_httpd(int server_socket) NORETURN;
static void mini_httpd(int server_socket)
{
	/* NB: it's best to not use xfuncs in this loop before fork().
	 * Otherwise server may die on transient errors (temporary
	 * out-of-memory condition, etc), which is Bad(tm).
	 * Try to do any dangerous calls after fork.
	 */
	while (1) {
		int n;
		len_and_sockaddr fromAddr;

		/* Wait for connections... */
		fromAddr.len = LSA_SIZEOF_SA;
		n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);

		if (n < 0)
			continue;
		/* set the KEEPALIVE option to cull dead connections */
		setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));

		if (fork() == 0) {
			/* child */
			/* Do not reload config on HUP */
			signal(SIGHUP, SIG_IGN);
			close(server_socket);
			xmove_fd(n, 0);
			xdup2(0, 1);

			handle_incoming_and_exit(&fromAddr);
		}
		/* parent, or fork failed */
		close(n);
	} /* while (1) */
	/* never reached */
}
#else
static void mini_httpd_nommu(int server_socket, int argc, char **argv) NORETURN;
static void mini_httpd_nommu(int server_socket, int argc, char **argv)
{
	char *argv_copy[argc + 2];

	argv_copy[0] = argv[0];
	argv_copy[1] = (char*)"-i";
	memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));

	/* NB: it's best to not use xfuncs in this loop before vfork().
	 * Otherwise server may die on transient errors (temporary
	 * out-of-memory condition, etc), which is Bad(tm).
	 * Try to do any dangerous calls after fork.
	 */
	while (1) {
		int n;
		len_and_sockaddr fromAddr;

		/* Wait for connections... */
		fromAddr.len = LSA_SIZEOF_SA;
		n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);

		if (n < 0)
			continue;
		/* set the KEEPALIVE option to cull dead connections */
		setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));

		if (vfork() == 0) {
			/* child */
			/* Do not reload config on HUP */
			signal(SIGHUP, SIG_IGN);
			close(server_socket);
			xmove_fd(n, 0);
			xdup2(0, 1);

			/* Run a copy of ourself in inetd mode */
			re_exec(argv_copy);
		}
		/* parent, or vfork failed */
		close(n);
	} /* while (1) */
	/* never reached */
}
#endif

/*
 * Process a HTTP connection on stdin/out.
 * Never returns.
 */
static void mini_httpd_inetd(void) NORETURN;
static void mini_httpd_inetd(void)
{
	len_and_sockaddr fromAddr;

	memset(&fromAddr, 0, sizeof(fromAddr));
	fromAddr.len = LSA_SIZEOF_SA;
	/* NB: can fail if user runs it by hand and types in http cmds */
	getpeername(0, &fromAddr.u.sa, &fromAddr.len);
	handle_incoming_and_exit(&fromAddr);
}

static void sighup_handler(int sig UNUSED_PARAM)
{
	parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
}

enum {
	c_opt_config_file = 0,
	d_opt_decode_url,
	h_opt_home_httpd,
	IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
	IF_FEATURE_HTTPD_BASIC_AUTH(    r_opt_realm     ,)
	IF_FEATURE_HTTPD_AUTH_MD5(      m_opt_md5       ,)
	IF_FEATURE_HTTPD_SETUID(        u_opt_setuid    ,)
	p_opt_port      ,
	p_opt_inetd     ,
	p_opt_foreground,
	p_opt_verbose   ,
	OPT_CONFIG_FILE = 1 << c_opt_config_file,
	OPT_DECODE_URL  = 1 << d_opt_decode_url,
	OPT_HOME_HTTPD  = 1 << h_opt_home_httpd,
	OPT_ENCODE_URL  = IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
	OPT_REALM       = IF_FEATURE_HTTPD_BASIC_AUTH(    (1 << r_opt_realm     )) + 0,
	OPT_MD5         = IF_FEATURE_HTTPD_AUTH_MD5(      (1 << m_opt_md5       )) + 0,
	OPT_SETUID      = IF_FEATURE_HTTPD_SETUID(        (1 << u_opt_setuid    )) + 0,
	OPT_PORT        = 1 << p_opt_port,
	OPT_INETD       = 1 << p_opt_inetd,
	OPT_FOREGROUND  = 1 << p_opt_foreground,
	OPT_VERBOSE     = 1 << p_opt_verbose,
};


int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int httpd_main(int argc UNUSED_PARAM, char **argv)
{
	int server_socket = server_socket; /* for gcc */
	unsigned opt;
	char *url_for_decode;
	IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
	IF_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
	IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
	IF_FEATURE_HTTPD_AUTH_MD5(const char *pass;)

	INIT_G();

#if ENABLE_LOCALE_SUPPORT
	/* Undo busybox.c: we want to speak English in http (dates etc) */
	setlocale(LC_TIME, "C");
#endif

	home_httpd = xrealloc_getcwd_or_warn(NULL);
	/* -v counts, -i implies -f */
	opt_complementary = "vv:if";
	/* We do not "absolutize" path given by -h (home) opt.
	 * If user gives relative path in -h,
	 * $SCRIPT_FILENAME will not be set. */
	opt = getopt32(argv, "c:d:h:"
			IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
			IF_FEATURE_HTTPD_BASIC_AUTH("r:")
			IF_FEATURE_HTTPD_AUTH_MD5("m:")
			IF_FEATURE_HTTPD_SETUID("u:")
			"p:ifv",
			&opt_c_configFile, &url_for_decode, &home_httpd
			IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
			IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
			IF_FEATURE_HTTPD_AUTH_MD5(, &pass)
			IF_FEATURE_HTTPD_SETUID(, &s_ugid)
			, &bind_addr_or_port
			, &verbose
		);
	if (opt & OPT_DECODE_URL) {
		fputs(decodeString(url_for_decode, 1), stdout);
		return 0;
	}
#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
	if (opt & OPT_ENCODE_URL) {
		fputs(encodeString(url_for_encode), stdout);
		return 0;
	}
#endif
#if ENABLE_FEATURE_HTTPD_AUTH_MD5
	if (opt & OPT_MD5) {
		puts(pw_encrypt(pass, "$1$", 1));
		return 0;
	}
#endif
#if ENABLE_FEATURE_HTTPD_SETUID
	if (opt & OPT_SETUID) {
		xget_uidgid(&ugid, s_ugid);
	}
#endif

#if !BB_MMU
	if (!(opt & OPT_FOREGROUND)) {
		bb_daemonize_or_rexec(0, argv); /* don't change current directory */
	}
#endif

	xchdir(home_httpd);
	if (!(opt & OPT_INETD)) {
		signal(SIGCHLD, SIG_IGN);
		server_socket = openServer();
#if ENABLE_FEATURE_HTTPD_SETUID
		/* drop privileges */
		if (opt & OPT_SETUID) {
			if (ugid.gid != (gid_t)-1) {
				if (setgroups(1, &ugid.gid) == -1)
					bb_perror_msg_and_die("setgroups");
				xsetgid(ugid.gid);
			}
			xsetuid(ugid.uid);
		}
#endif
	}

#if 0
	/* User can do it himself: 'env - PATH="$PATH" httpd'
	 * We don't do it because we don't want to screw users
	 * which want to do
	 * 'env - VAR1=val1 VAR2=val2 httpd'
	 * and have VAR1 and VAR2 values visible in their CGIs.
	 * Besides, it is also smaller. */
	{
		char *p = getenv("PATH");
		/* env strings themself are not freed, no need to xstrdup(p): */
		clearenv();
		if (p)
			putenv(p - 5);
//		if (!(opt & OPT_INETD))
//			setenv_long("SERVER_PORT", ???);
	}
#endif

	parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
	if (!(opt & OPT_INETD))
		signal(SIGHUP, sighup_handler);

	xfunc_error_retval = 0;
	if (opt & OPT_INETD)
		mini_httpd_inetd();
#if BB_MMU
	if (!(opt & OPT_FOREGROUND))
		bb_daemonize(0); /* don't change current directory */
	mini_httpd(server_socket); /* never returns */
#else
	mini_httpd_nommu(server_socket, argc, argv); /* never returns */
#endif
	/* return 0; */
}