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