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[openwrt/svn-archive/archive.git] / package / uhttpd / src / uhttpd.c
1 /*
2 * uhttpd - Tiny single-threaded httpd - Main component
3 *
4 * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 #define _XOPEN_SOURCE 500 /* crypt() */
20
21 #include "uhttpd.h"
22 #include "uhttpd-utils.h"
23 #include "uhttpd-file.h"
24
25 #ifdef HAVE_CGI
26 #include "uhttpd-cgi.h"
27 #endif
28
29 #ifdef HAVE_LUA
30 #include "uhttpd-lua.h"
31 #endif
32
33 #ifdef HAVE_TLS
34 #include "uhttpd-tls.h"
35 #endif
36
37
38 static int run = 1;
39
40 static void uh_sigterm(int sig)
41 {
42 run = 0;
43 }
44
45 static void uh_sigchld(int sig)
46 {
47 while( waitpid(-1, NULL, WNOHANG) > 0 ) { }
48 }
49
50 static void uh_config_parse(struct config *conf)
51 {
52 FILE *c;
53 char line[512];
54 char *col1 = NULL;
55 char *col2 = NULL;
56 char *eol = NULL;
57
58 const char *path = conf->file ? conf->file : "/etc/httpd.conf";
59
60
61 if( (c = fopen(path, "r")) != NULL )
62 {
63 memset(line, 0, sizeof(line));
64
65 while( fgets(line, sizeof(line) - 1, c) )
66 {
67 if( (line[0] == '/') && (strchr(line, ':') != NULL) )
68 {
69 if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
70 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
71 !(eol = strchr(col2, '\n')) || (*eol++ = 0) )
72 continue;
73
74 if( !uh_auth_add(line, col1, col2) )
75 {
76 fprintf(stderr,
77 "Notice: No password set for user %s, ignoring "
78 "authentication on %s\n", col1, line
79 );
80 }
81 }
82 else if( !strncmp(line, "I:", 2) )
83 {
84 if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
85 !(eol = strchr(col1, '\n')) || (*eol++ = 0) )
86 continue;
87
88 conf->index_file = strdup(col1);
89 }
90 else if( !strncmp(line, "E404:", 5) )
91 {
92 if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
93 !(eol = strchr(col1, '\n')) || (*eol++ = 0) )
94 continue;
95
96 conf->error_handler = strdup(col1);
97 }
98 #ifdef HAVE_CGI
99 else if( (line[0] == '*') && (strchr(line, ':') != NULL) )
100 {
101 if( !(col1 = strchr(line, '*')) || (*col1++ = 0) ||
102 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
103 !(eol = strchr(col2, '\n')) || (*eol++ = 0) )
104 continue;
105
106 if( !uh_interpreter_add(col1, col2) )
107 {
108 fprintf(stderr,
109 "Unable to add interpreter %s for extension %s: "
110 "Out of memory\n", col2, col1
111 );
112 }
113 }
114 #endif
115 }
116
117 fclose(c);
118 }
119 }
120
121 static int uh_socket_bind(
122 fd_set *serv_fds, int *max_fd, const char *host, const char *port,
123 struct addrinfo *hints, int do_tls, struct config *conf
124 ) {
125 int sock = -1;
126 int yes = 1;
127 int status;
128 int bound = 0;
129
130 int tcp_ka_idl = 1;
131 int tcp_ka_int = 1;
132 int tcp_ka_cnt = 3;
133
134 struct listener *l = NULL;
135 struct addrinfo *addrs = NULL, *p = NULL;
136
137 if( (status = getaddrinfo(host, port, hints, &addrs)) != 0 )
138 {
139 fprintf(stderr, "getaddrinfo(): %s\n", gai_strerror(status));
140 }
141
142 /* try to bind a new socket to each found address */
143 for( p = addrs; p; p = p->ai_next )
144 {
145 /* get the socket */
146 if( (sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1 )
147 {
148 perror("socket()");
149 goto error;
150 }
151
152 /* "address already in use" */
153 if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) )
154 {
155 perror("setsockopt()");
156 goto error;
157 }
158
159 /* TCP keep-alive */
160 if( setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) ||
161 setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, &tcp_ka_idl, sizeof(tcp_ka_idl)) ||
162 setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &tcp_ka_int, sizeof(tcp_ka_int)) ||
163 setsockopt(sock, SOL_TCP, TCP_KEEPCNT, &tcp_ka_cnt, sizeof(tcp_ka_cnt)) )
164 {
165 fprintf(stderr, "Notice: Unable to enable TCP keep-alive: %s\n",
166 strerror(errno));
167 }
168
169 /* required to get parallel v4 + v6 working */
170 if( p->ai_family == AF_INET6 )
171 {
172 if( setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(yes)) == -1 )
173 {
174 perror("setsockopt()");
175 goto error;
176 }
177 }
178
179 /* bind */
180 if( bind(sock, p->ai_addr, p->ai_addrlen) == -1 )
181 {
182 perror("bind()");
183 goto error;
184 }
185
186 /* listen */
187 if( listen(sock, UH_LIMIT_CLIENTS) == -1 )
188 {
189 perror("listen()");
190 goto error;
191 }
192
193 /* add listener to global list */
194 if( ! (l = uh_listener_add(sock, conf)) )
195 {
196 fprintf(stderr, "uh_listener_add(): Failed to allocate memory\n");
197 goto error;
198 }
199
200 #ifdef HAVE_TLS
201 /* init TLS */
202 l->tls = do_tls ? conf->tls : NULL;
203 #endif
204
205 /* add socket to server fd set */
206 FD_SET(sock, serv_fds);
207 fd_cloexec(sock);
208 *max_fd = max(*max_fd, sock);
209
210 bound++;
211 continue;
212
213 error:
214 if( sock > 0 )
215 close(sock);
216 }
217
218 freeaddrinfo(addrs);
219
220 return bound;
221 }
222
223 static struct http_request * uh_http_header_parse(struct client *cl, char *buffer, int buflen)
224 {
225 char *method = &buffer[0];
226 char *path = NULL;
227 char *version = NULL;
228
229 char *headers = NULL;
230 char *hdrname = NULL;
231 char *hdrdata = NULL;
232
233 int i;
234 int hdrcount = 0;
235
236 static struct http_request req;
237
238 memset(&req, 0, sizeof(req));
239
240
241 /* terminate initial header line */
242 if( (headers = strfind(buffer, buflen, "\r\n", 2)) != NULL )
243 {
244 buffer[buflen-1] = 0;
245
246 *headers++ = 0;
247 *headers++ = 0;
248
249 /* find request path */
250 if( (path = strchr(buffer, ' ')) != NULL )
251 *path++ = 0;
252
253 /* find http version */
254 if( (path != NULL) && ((version = strchr(path, ' ')) != NULL) )
255 *version++ = 0;
256
257
258 /* check method */
259 if( strcmp(method, "GET") && strcmp(method, "HEAD") && strcmp(method, "POST") )
260 {
261 /* invalid method */
262 uh_http_response(cl, 405, "Method Not Allowed");
263 return NULL;
264 }
265 else
266 {
267 switch(method[0])
268 {
269 case 'G':
270 req.method = UH_HTTP_MSG_GET;
271 break;
272
273 case 'H':
274 req.method = UH_HTTP_MSG_HEAD;
275 break;
276
277 case 'P':
278 req.method = UH_HTTP_MSG_POST;
279 break;
280 }
281 }
282
283 /* check path */
284 if( !path || !strlen(path) )
285 {
286 /* malformed request */
287 uh_http_response(cl, 400, "Bad Request");
288 return NULL;
289 }
290 else
291 {
292 req.url = path;
293 }
294
295 /* check version */
296 if( (version == NULL) || (strcmp(version, "HTTP/0.9") &&
297 strcmp(version, "HTTP/1.0") && strcmp(version, "HTTP/1.1")) )
298 {
299 /* unsupported version */
300 uh_http_response(cl, 400, "Bad Request");
301 return NULL;
302 }
303 else
304 {
305 req.version = strtof(&version[5], NULL);
306 }
307
308
309 /* process header fields */
310 for( i = (int)(headers - buffer); i < buflen; i++ )
311 {
312 /* found eol and have name + value, push out header tuple */
313 if( hdrname && hdrdata && (buffer[i] == '\r' || buffer[i] == '\n') )
314 {
315 buffer[i] = 0;
316
317 /* store */
318 if( (hdrcount + 1) < array_size(req.headers) )
319 {
320 req.headers[hdrcount++] = hdrname;
321 req.headers[hdrcount++] = hdrdata;
322
323 hdrname = hdrdata = NULL;
324 }
325
326 /* too large */
327 else
328 {
329 uh_http_response(cl, 413, "Request Entity Too Large");
330 return NULL;
331 }
332 }
333
334 /* have name but no value and found a colon, start of value */
335 else if( hdrname && !hdrdata && ((i+2) < buflen) &&
336 (buffer[i] == ':') && (buffer[i+1] == ' ')
337 ) {
338 buffer[i] = 0;
339 hdrdata = &buffer[i+2];
340 }
341
342 /* have no name and found [A-Z], start of name */
343 else if( !hdrname && isalpha(buffer[i]) && isupper(buffer[i]) )
344 {
345 hdrname = &buffer[i];
346 }
347 }
348
349 /* valid enough */
350 req.redirect_status = 200;
351 return &req;
352 }
353
354 /* Malformed request */
355 uh_http_response(cl, 400, "Bad Request");
356 return NULL;
357 }
358
359
360 static struct http_request * uh_http_header_recv(struct client *cl)
361 {
362 static char buffer[UH_LIMIT_MSGHEAD];
363 char *bufptr = &buffer[0];
364 char *idxptr = NULL;
365
366 struct timeval timeout;
367
368 fd_set reader;
369
370 ssize_t blen = sizeof(buffer)-1;
371 ssize_t rlen = 0;
372
373 memset(buffer, 0, sizeof(buffer));
374
375 while( blen > 0 )
376 {
377 FD_ZERO(&reader);
378 FD_SET(cl->socket, &reader);
379
380 /* fail after 0.1s */
381 timeout.tv_sec = 0;
382 timeout.tv_usec = 100000;
383
384 /* check whether fd is readable */
385 if( select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0 )
386 {
387 /* receive data */
388 ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen));
389
390 if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
391 {
392 ensure_out(rlen = uh_tcp_recv(cl, bufptr,
393 (int)(idxptr - bufptr) + 4));
394
395 /* header read complete ... */
396 blen -= rlen;
397 return uh_http_header_parse(cl, buffer,
398 sizeof(buffer) - blen - 1);
399 }
400 else
401 {
402 ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen));
403
404 /* unexpected eof - #7904 */
405 if( rlen == 0 )
406 return NULL;
407
408 blen -= rlen;
409 bufptr += rlen;
410 }
411 }
412 else
413 {
414 /* invalid request (unexpected eof/timeout) */
415 return NULL;
416 }
417 }
418
419 /* request entity too large */
420 uh_http_response(cl, 413, "Request Entity Too Large");
421
422 out:
423 return NULL;
424 }
425
426 #if defined(HAVE_LUA) || defined(HAVE_CGI)
427 static int uh_path_match(const char *prefix, const char *url)
428 {
429 if( (strstr(url, prefix) == url) &&
430 ((prefix[strlen(prefix)-1] == '/') ||
431 (strlen(url) == strlen(prefix)) ||
432 (url[strlen(prefix)] == '/'))
433 ) {
434 return 1;
435 }
436
437 return 0;
438 }
439 #endif
440
441 static void uh_dispatch_request(
442 struct client *cl, struct http_request *req, struct path_info *pin
443 ) {
444 #ifdef HAVE_CGI
445 struct interpreter *ipr = NULL;
446
447 if( uh_path_match(cl->server->conf->cgi_prefix, pin->name) ||
448 (ipr = uh_interpreter_lookup(pin->phys)) )
449 {
450 uh_cgi_request(cl, req, pin, ipr);
451 }
452 else
453 #endif
454 {
455 uh_file_request(cl, req, pin);
456 }
457 }
458
459 static void uh_mainloop(struct config *conf, fd_set serv_fds, int max_fd)
460 {
461 /* master file descriptor list */
462 fd_set used_fds, read_fds;
463
464 /* working structs */
465 struct http_request *req;
466 struct path_info *pin;
467 struct client *cl;
468
469 /* maximum file descriptor number */
470 int new_fd, cur_fd = 0;
471
472 /* clear the master and temp sets */
473 FD_ZERO(&used_fds);
474 FD_ZERO(&read_fds);
475
476 /* backup server descriptor set */
477 used_fds = serv_fds;
478
479 /* loop */
480 while(run)
481 {
482 /* create a working copy of the used fd set */
483 read_fds = used_fds;
484
485 /* sleep until socket activity */
486 if( select(max_fd + 1, &read_fds, NULL, NULL, NULL) == -1 )
487 {
488 perror("select()");
489 exit(1);
490 }
491
492 /* run through the existing connections looking for data to be read */
493 for( cur_fd = 0; cur_fd <= max_fd; cur_fd++ )
494 {
495 /* is a socket managed by us */
496 if( FD_ISSET(cur_fd, &read_fds) )
497 {
498 /* is one of our listen sockets */
499 if( FD_ISSET(cur_fd, &serv_fds) )
500 {
501 /* handle new connections */
502 if( (new_fd = accept(cur_fd, NULL, 0)) != -1 )
503 {
504 /* add to global client list */
505 if( (cl = uh_client_add(new_fd, uh_listener_lookup(cur_fd))) != NULL )
506 {
507 #ifdef HAVE_TLS
508 /* setup client tls context */
509 if( conf->tls )
510 conf->tls_accept(cl);
511 #endif
512
513 /* add client socket to global fdset */
514 FD_SET(new_fd, &used_fds);
515 fd_cloexec(new_fd);
516 max_fd = max(max_fd, new_fd);
517 }
518
519 /* insufficient resources */
520 else
521 {
522 fprintf(stderr,
523 "uh_client_add(): Cannot allocate memory\n");
524
525 close(new_fd);
526 }
527 }
528 }
529
530 /* is a client socket */
531 else
532 {
533 if( ! (cl = uh_client_lookup(cur_fd)) )
534 {
535 /* this should not happen! */
536 fprintf(stderr,
537 "uh_client_lookup(): No entry for fd %i!\n",
538 cur_fd);
539
540 goto cleanup;
541 }
542
543 /* parse message header */
544 if( (req = uh_http_header_recv(cl)) != NULL )
545 {
546 /* RFC1918 filtering required? */
547 if( conf->rfc1918_filter &&
548 sa_rfc1918(&cl->peeraddr) &&
549 !sa_rfc1918(&cl->servaddr) )
550 {
551 uh_http_sendhf(cl, 403, "Forbidden",
552 "Rejected request from RFC1918 IP "
553 "to public server address");
554 }
555 else
556 #ifdef HAVE_LUA
557 /* Lua request? */
558 if( conf->lua_state &&
559 uh_path_match(conf->lua_prefix, req->url) )
560 {
561 conf->lua_request(cl, req, conf->lua_state);
562 }
563 else
564 #endif
565 /* dispatch request */
566 if( (pin = uh_path_lookup(cl, req->url)) != NULL )
567 {
568 /* auth ok? */
569 if( uh_auth_check(cl, req, pin) )
570 uh_dispatch_request(cl, req, pin);
571 }
572
573 /* 404 */
574 else
575 {
576 /* Try to invoke an error handler */
577 pin = uh_path_lookup(cl, conf->error_handler);
578
579 if( pin && uh_auth_check(cl, req, pin) )
580 {
581 req->redirect_status = 404;
582 uh_dispatch_request(cl, req, pin);
583 }
584 else
585 {
586 uh_http_sendhf(cl, 404, "Not Found",
587 "No such file or directory");
588 }
589 }
590 }
591
592 #ifdef HAVE_TLS
593 /* free client tls context */
594 if( conf->tls )
595 conf->tls_close(cl);
596 #endif
597
598 cleanup:
599
600 /* close client socket */
601 close(cur_fd);
602 FD_CLR(cur_fd, &used_fds);
603
604 /* remove from global client list */
605 uh_client_remove(cur_fd);
606 }
607 }
608 }
609 }
610
611 #ifdef HAVE_LUA
612 /* destroy the Lua state */
613 if( conf->lua_state != NULL )
614 conf->lua_close(conf->lua_state);
615 #endif
616 }
617
618
619 int main (int argc, char **argv)
620 {
621 /* master file descriptor list */
622 fd_set used_fds, serv_fds, read_fds;
623
624 /* working structs */
625 struct addrinfo hints;
626 struct sigaction sa;
627 struct config conf;
628
629 /* signal mask */
630 sigset_t ss;
631
632 /* maximum file descriptor number */
633 int cur_fd, max_fd = 0;
634
635 #ifdef HAVE_TLS
636 int tls = 0;
637 int keys = 0;
638 #endif
639
640 int bound = 0;
641 int nofork = 0;
642
643 /* args */
644 int opt;
645 char bind[128];
646 char *port = NULL;
647
648 #if defined(HAVE_TLS) || defined(HAVE_LUA)
649 /* library handle */
650 void *lib;
651 #endif
652
653 /* clear the master and temp sets */
654 FD_ZERO(&used_fds);
655 FD_ZERO(&serv_fds);
656 FD_ZERO(&read_fds);
657
658 /* handle SIGPIPE, SIGINT, SIGTERM, SIGCHLD */
659 sa.sa_flags = 0;
660 sigemptyset(&sa.sa_mask);
661
662 sa.sa_handler = SIG_IGN;
663 sigaction(SIGPIPE, &sa, NULL);
664
665 sa.sa_handler = uh_sigchld;
666 sigaction(SIGCHLD, &sa, NULL);
667
668 sa.sa_handler = uh_sigterm;
669 sigaction(SIGINT, &sa, NULL);
670 sigaction(SIGTERM, &sa, NULL);
671
672 /* defer SIGCHLD */
673 sigemptyset(&ss);
674 sigaddset(&ss, SIGCHLD);
675 sigprocmask(SIG_BLOCK, &ss, NULL);
676
677 /* prepare addrinfo hints */
678 memset(&hints, 0, sizeof(hints));
679 hints.ai_family = AF_UNSPEC;
680 hints.ai_socktype = SOCK_STREAM;
681 hints.ai_flags = AI_PASSIVE;
682
683 /* parse args */
684 memset(&conf, 0, sizeof(conf));
685 memset(bind, 0, sizeof(bind));
686
687 #ifdef HAVE_TLS
688 /* load TLS plugin */
689 if( ! (lib = dlopen("uhttpd_tls.so", RTLD_LAZY | RTLD_GLOBAL)) )
690 {
691 fprintf(stderr,
692 "Notice: Unable to load TLS plugin - disabling SSL support! "
693 "(Reason: %s)\n", dlerror()
694 );
695 }
696 else
697 {
698 /* resolve functions */
699 if( !(conf.tls_init = dlsym(lib, "uh_tls_ctx_init")) ||
700 !(conf.tls_cert = dlsym(lib, "uh_tls_ctx_cert")) ||
701 !(conf.tls_key = dlsym(lib, "uh_tls_ctx_key")) ||
702 !(conf.tls_free = dlsym(lib, "uh_tls_ctx_free")) ||
703 !(conf.tls_accept = dlsym(lib, "uh_tls_client_accept")) ||
704 !(conf.tls_close = dlsym(lib, "uh_tls_client_close")) ||
705 !(conf.tls_recv = dlsym(lib, "uh_tls_client_recv")) ||
706 !(conf.tls_send = dlsym(lib, "uh_tls_client_send"))
707 ) {
708 fprintf(stderr,
709 "Error: Failed to lookup required symbols "
710 "in TLS plugin: %s\n", dlerror()
711 );
712 exit(1);
713 }
714
715 /* init SSL context */
716 if( ! (conf.tls = conf.tls_init()) )
717 {
718 fprintf(stderr, "Error: Failed to initalize SSL context\n");
719 exit(1);
720 }
721 }
722 #endif
723
724 while( (opt = getopt(argc, argv,
725 "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:x:i:t:T:")) > 0
726 ) {
727 switch(opt)
728 {
729 /* [addr:]port */
730 case 'p':
731 case 's':
732 if( (port = strrchr(optarg, ':')) != NULL )
733 {
734 if( (optarg[0] == '[') && (port > optarg) && (port[-1] == ']') )
735 memcpy(bind, optarg + 1,
736 min(sizeof(bind), (int)(port - optarg) - 2));
737 else
738 memcpy(bind, optarg,
739 min(sizeof(bind), (int)(port - optarg)));
740
741 port++;
742 }
743 else
744 {
745 port = optarg;
746 }
747
748 #ifdef HAVE_TLS
749 if( opt == 's' )
750 {
751 if( !conf.tls )
752 {
753 fprintf(stderr,
754 "Notice: TLS support is disabled, "
755 "ignoring '-s %s'\n", optarg
756 );
757 continue;
758 }
759
760 tls = 1;
761 }
762 #endif
763
764 /* bind sockets */
765 bound += uh_socket_bind(
766 &serv_fds, &max_fd, bind[0] ? bind : NULL, port,
767 &hints, (opt == 's'), &conf
768 );
769
770 memset(bind, 0, sizeof(bind));
771 break;
772
773 #ifdef HAVE_TLS
774 /* certificate */
775 case 'C':
776 if( conf.tls )
777 {
778 if( conf.tls_cert(conf.tls, optarg) < 1 )
779 {
780 fprintf(stderr,
781 "Error: Invalid certificate file given\n");
782 exit(1);
783 }
784
785 keys++;
786 }
787
788 break;
789
790 /* key */
791 case 'K':
792 if( conf.tls )
793 {
794 if( conf.tls_key(conf.tls, optarg) < 1 )
795 {
796 fprintf(stderr,
797 "Error: Invalid private key file given\n");
798 exit(1);
799 }
800
801 keys++;
802 }
803
804 break;
805 #endif
806
807 /* docroot */
808 case 'h':
809 if( ! realpath(optarg, conf.docroot) )
810 {
811 fprintf(stderr, "Error: Invalid directory %s: %s\n",
812 optarg, strerror(errno));
813 exit(1);
814 }
815 break;
816
817 /* error handler */
818 case 'E':
819 if( (strlen(optarg) == 0) || (optarg[0] != '/') )
820 {
821 fprintf(stderr, "Error: Invalid error handler: %s\n",
822 optarg);
823 exit(1);
824 }
825 conf.error_handler = optarg;
826 break;
827
828 /* index file */
829 case 'I':
830 if( (strlen(optarg) == 0) || (optarg[0] == '/') )
831 {
832 fprintf(stderr, "Error: Invalid index page: %s\n",
833 optarg);
834 exit(1);
835 }
836 conf.index_file = optarg;
837 break;
838
839 /* don't follow symlinks */
840 case 'S':
841 conf.no_symlinks = 1;
842 break;
843
844 /* don't list directories */
845 case 'D':
846 conf.no_dirlists = 1;
847 break;
848
849 case 'R':
850 conf.rfc1918_filter = 1;
851 break;
852
853 #ifdef HAVE_CGI
854 /* cgi prefix */
855 case 'x':
856 conf.cgi_prefix = optarg;
857 break;
858
859 /* interpreter */
860 case 'i':
861 if( (optarg[0] == '.') && (port = strchr(optarg, '=')) )
862 {
863 *port++ = 0;
864 uh_interpreter_add(optarg, port);
865 }
866 else
867 {
868 fprintf(stderr, "Error: Invalid interpreter: %s\n",
869 optarg);
870 exit(1);
871 }
872 break;
873 #endif
874
875 #ifdef HAVE_LUA
876 /* lua prefix */
877 case 'l':
878 conf.lua_prefix = optarg;
879 break;
880
881 /* lua handler */
882 case 'L':
883 conf.lua_handler = optarg;
884 break;
885 #endif
886
887 #if defined(HAVE_CGI) || defined(HAVE_LUA)
888 /* script timeout */
889 case 't':
890 conf.script_timeout = atoi(optarg);
891 break;
892 #endif
893
894 /* network timeout */
895 case 'T':
896 conf.network_timeout = atoi(optarg);
897 break;
898
899 /* no fork */
900 case 'f':
901 nofork = 1;
902 break;
903
904 /* urldecode */
905 case 'd':
906 if( (port = malloc(strlen(optarg)+1)) != NULL )
907 {
908 memset(port, 0, strlen(optarg)+1);
909 uh_urldecode(port, strlen(optarg), optarg, strlen(optarg));
910 printf("%s", port);
911 free(port);
912 exit(0);
913 }
914 break;
915
916 /* basic auth realm */
917 case 'r':
918 conf.realm = optarg;
919 break;
920
921 /* md5 crypt */
922 case 'm':
923 printf("%s\n", crypt(optarg, "$1$"));
924 exit(0);
925 break;
926
927 /* config file */
928 case 'c':
929 conf.file = optarg;
930 break;
931
932 default:
933 fprintf(stderr,
934 "Usage: %s -p [addr:]port [-h docroot]\n"
935 " -f Do not fork to background\n"
936 " -c file Configuration file, default is '/etc/httpd.conf'\n"
937 " -p [addr:]port Bind to specified address and port, multiple allowed\n"
938 #ifdef HAVE_TLS
939 " -s [addr:]port Like -p but provide HTTPS on this port\n"
940 " -C file ASN.1 server certificate file\n"
941 " -K file ASN.1 server private key file\n"
942 #endif
943 " -h directory Specify the document root, default is '.'\n"
944 " -E string Use given virtual URL as 404 error handler\n"
945 " -I string Use given filename as index page for directories\n"
946 " -S Do not follow symbolic links outside of the docroot\n"
947 " -D Do not allow directory listings, send 403 instead\n"
948 " -R Enable RFC1918 filter\n"
949 #ifdef HAVE_LUA
950 " -l string URL prefix for Lua handler, default is '/lua'\n"
951 " -L file Lua handler script, omit to disable Lua\n"
952 #endif
953 #ifdef HAVE_CGI
954 " -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
955 " -i .ext=path Use interpreter at path for files with the given extension\n"
956 #endif
957 #if defined(HAVE_CGI) || defined(HAVE_LUA)
958 " -t seconds CGI and Lua script timeout in seconds, default is 60\n"
959 #endif
960 " -T seconds Network timeout in seconds, default is 30\n"
961 " -d string URL decode given string\n"
962 " -r string Specify basic auth realm\n"
963 " -m string MD5 crypt given string\n"
964 "\n", argv[0]
965 );
966
967 exit(1);
968 }
969 }
970
971 #ifdef HAVE_TLS
972 if( (tls == 1) && (keys < 2) )
973 {
974 fprintf(stderr, "Error: Missing private key or certificate file\n");
975 exit(1);
976 }
977 #endif
978
979 if( bound < 1 )
980 {
981 fprintf(stderr, "Error: No sockets bound, unable to continue\n");
982 exit(1);
983 }
984
985 /* default docroot */
986 if( !conf.docroot[0] && !realpath(".", conf.docroot) )
987 {
988 fprintf(stderr, "Error: Can not determine default document root: %s\n",
989 strerror(errno));
990 exit(1);
991 }
992
993 /* default realm */
994 if( ! conf.realm )
995 conf.realm = "Protected Area";
996
997 /* config file */
998 uh_config_parse(&conf);
999
1000 /* default network timeout */
1001 if( conf.network_timeout <= 0 )
1002 conf.network_timeout = 30;
1003
1004 #if defined(HAVE_CGI) || defined(HAVE_LUA)
1005 /* default script timeout */
1006 if( conf.script_timeout <= 0 )
1007 conf.script_timeout = 60;
1008 #endif
1009
1010 #ifdef HAVE_CGI
1011 /* default cgi prefix */
1012 if( ! conf.cgi_prefix )
1013 conf.cgi_prefix = "/cgi-bin";
1014 #endif
1015
1016 #ifdef HAVE_LUA
1017 /* load Lua plugin */
1018 if( ! (lib = dlopen("uhttpd_lua.so", RTLD_LAZY | RTLD_GLOBAL)) )
1019 {
1020 fprintf(stderr,
1021 "Notice: Unable to load Lua plugin - disabling Lua support! "
1022 "(Reason: %s)\n", dlerror()
1023 );
1024 }
1025 else
1026 {
1027 /* resolve functions */
1028 if( !(conf.lua_init = dlsym(lib, "uh_lua_init")) ||
1029 !(conf.lua_close = dlsym(lib, "uh_lua_close")) ||
1030 !(conf.lua_request = dlsym(lib, "uh_lua_request"))
1031 ) {
1032 fprintf(stderr,
1033 "Error: Failed to lookup required symbols "
1034 "in Lua plugin: %s\n", dlerror()
1035 );
1036 exit(1);
1037 }
1038
1039 /* init Lua runtime if handler is specified */
1040 if( conf.lua_handler )
1041 {
1042 /* default lua prefix */
1043 if( ! conf.lua_prefix )
1044 conf.lua_prefix = "/lua";
1045
1046 conf.lua_state = conf.lua_init(conf.lua_handler);
1047 }
1048 }
1049 #endif
1050
1051 /* fork (if not disabled) */
1052 if( ! nofork )
1053 {
1054 switch( fork() )
1055 {
1056 case -1:
1057 perror("fork()");
1058 exit(1);
1059
1060 case 0:
1061 /* daemon setup */
1062 if( chdir("/") )
1063 perror("chdir()");
1064
1065 if( (cur_fd = open("/dev/null", O_WRONLY)) > -1 )
1066 dup2(cur_fd, 0);
1067
1068 if( (cur_fd = open("/dev/null", O_RDONLY)) > -1 )
1069 dup2(cur_fd, 1);
1070
1071 if( (cur_fd = open("/dev/null", O_RDONLY)) > -1 )
1072 dup2(cur_fd, 2);
1073
1074 break;
1075
1076 default:
1077 exit(0);
1078 }
1079 }
1080
1081 /* server main loop */
1082 uh_mainloop(&conf, serv_fds, max_fd);
1083
1084 #ifdef HAVE_LUA
1085 /* destroy the Lua state */
1086 if( conf.lua_state != NULL )
1087 conf.lua_close(conf.lua_state);
1088 #endif
1089
1090 return 0;
1091 }
1092
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