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kernel: add md5sum of kernel
[openwrt.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, tcp_ka_int, tcp_ka_cnt;
131
132 struct listener *l = NULL;
133 struct addrinfo *addrs = NULL, *p = NULL;
134
135 if( (status = getaddrinfo(host, port, hints, &addrs)) != 0 )
136 {
137 fprintf(stderr, "getaddrinfo(): %s\n", gai_strerror(status));
138 }
139
140 /* try to bind a new socket to each found address */
141 for( p = addrs; p; p = p->ai_next )
142 {
143 /* get the socket */
144 if( (sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1 )
145 {
146 perror("socket()");
147 goto error;
148 }
149
150 /* "address already in use" */
151 if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) )
152 {
153 perror("setsockopt()");
154 goto error;
155 }
156
157 /* TCP keep-alive */
158 if( conf->tcp_keepalive > 0 )
159 {
160 tcp_ka_idl = 1;
161 tcp_ka_cnt = 3;
162 tcp_ka_int = conf->tcp_keepalive;
163
164 if( setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) ||
165 setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, &tcp_ka_idl, sizeof(tcp_ka_idl)) ||
166 setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &tcp_ka_int, sizeof(tcp_ka_int)) ||
167 setsockopt(sock, SOL_TCP, TCP_KEEPCNT, &tcp_ka_cnt, sizeof(tcp_ka_cnt)) )
168 {
169 fprintf(stderr, "Notice: Unable to enable TCP keep-alive: %s\n",
170 strerror(errno));
171 }
172 }
173
174 /* required to get parallel v4 + v6 working */
175 if( p->ai_family == AF_INET6 )
176 {
177 if( setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(yes)) == -1 )
178 {
179 perror("setsockopt()");
180 goto error;
181 }
182 }
183
184 /* bind */
185 if( bind(sock, p->ai_addr, p->ai_addrlen) == -1 )
186 {
187 perror("bind()");
188 goto error;
189 }
190
191 /* listen */
192 if( listen(sock, UH_LIMIT_CLIENTS) == -1 )
193 {
194 perror("listen()");
195 goto error;
196 }
197
198 /* add listener to global list */
199 if( ! (l = uh_listener_add(sock, conf)) )
200 {
201 fprintf(stderr, "uh_listener_add(): Failed to allocate memory\n");
202 goto error;
203 }
204
205 #ifdef HAVE_TLS
206 /* init TLS */
207 l->tls = do_tls ? conf->tls : NULL;
208 #endif
209
210 /* add socket to server fd set */
211 FD_SET(sock, serv_fds);
212 fd_cloexec(sock);
213 *max_fd = max(*max_fd, sock);
214
215 bound++;
216 continue;
217
218 error:
219 if( sock > 0 )
220 close(sock);
221 }
222
223 freeaddrinfo(addrs);
224
225 return bound;
226 }
227
228 static struct http_request * uh_http_header_parse(struct client *cl, char *buffer, int buflen)
229 {
230 char *method = &buffer[0];
231 char *path = NULL;
232 char *version = NULL;
233
234 char *headers = NULL;
235 char *hdrname = NULL;
236 char *hdrdata = NULL;
237
238 int i;
239 int hdrcount = 0;
240
241 static struct http_request req;
242
243 memset(&req, 0, sizeof(req));
244
245
246 /* terminate initial header line */
247 if( (headers = strfind(buffer, buflen, "\r\n", 2)) != NULL )
248 {
249 buffer[buflen-1] = 0;
250
251 *headers++ = 0;
252 *headers++ = 0;
253
254 /* find request path */
255 if( (path = strchr(buffer, ' ')) != NULL )
256 *path++ = 0;
257
258 /* find http version */
259 if( (path != NULL) && ((version = strchr(path, ' ')) != NULL) )
260 *version++ = 0;
261
262
263 /* check method */
264 if( strcmp(method, "GET") && strcmp(method, "HEAD") && strcmp(method, "POST") )
265 {
266 /* invalid method */
267 uh_http_response(cl, 405, "Method Not Allowed");
268 return NULL;
269 }
270 else
271 {
272 switch(method[0])
273 {
274 case 'G':
275 req.method = UH_HTTP_MSG_GET;
276 break;
277
278 case 'H':
279 req.method = UH_HTTP_MSG_HEAD;
280 break;
281
282 case 'P':
283 req.method = UH_HTTP_MSG_POST;
284 break;
285 }
286 }
287
288 /* check path */
289 if( !path || !strlen(path) )
290 {
291 /* malformed request */
292 uh_http_response(cl, 400, "Bad Request");
293 return NULL;
294 }
295 else
296 {
297 req.url = path;
298 }
299
300 /* check version */
301 if( (version == NULL) || (strcmp(version, "HTTP/0.9") &&
302 strcmp(version, "HTTP/1.0") && strcmp(version, "HTTP/1.1")) )
303 {
304 /* unsupported version */
305 uh_http_response(cl, 400, "Bad Request");
306 return NULL;
307 }
308 else
309 {
310 req.version = strtof(&version[5], NULL);
311 }
312
313
314 /* process header fields */
315 for( i = (int)(headers - buffer); i < buflen; i++ )
316 {
317 /* found eol and have name + value, push out header tuple */
318 if( hdrname && hdrdata && (buffer[i] == '\r' || buffer[i] == '\n') )
319 {
320 buffer[i] = 0;
321
322 /* store */
323 if( (hdrcount + 1) < array_size(req.headers) )
324 {
325 req.headers[hdrcount++] = hdrname;
326 req.headers[hdrcount++] = hdrdata;
327
328 hdrname = hdrdata = NULL;
329 }
330
331 /* too large */
332 else
333 {
334 uh_http_response(cl, 413, "Request Entity Too Large");
335 return NULL;
336 }
337 }
338
339 /* have name but no value and found a colon, start of value */
340 else if( hdrname && !hdrdata && ((i+2) < buflen) &&
341 (buffer[i] == ':') && (buffer[i+1] == ' ')
342 ) {
343 buffer[i] = 0;
344 hdrdata = &buffer[i+2];
345 }
346
347 /* have no name and found [A-Za-z], start of name */
348 else if( !hdrname && isalpha(buffer[i]) )
349 {
350 hdrname = &buffer[i];
351 }
352 }
353
354 /* valid enough */
355 req.redirect_status = 200;
356 return &req;
357 }
358
359 /* Malformed request */
360 uh_http_response(cl, 400, "Bad Request");
361 return NULL;
362 }
363
364
365 static struct http_request * uh_http_header_recv(struct client *cl)
366 {
367 static char buffer[UH_LIMIT_MSGHEAD];
368 char *bufptr = &buffer[0];
369 char *idxptr = NULL;
370
371 struct timeval timeout;
372
373 fd_set reader;
374
375 ssize_t blen = sizeof(buffer)-1;
376 ssize_t rlen = 0;
377
378 memset(buffer, 0, sizeof(buffer));
379
380 while( blen > 0 )
381 {
382 FD_ZERO(&reader);
383 FD_SET(cl->socket, &reader);
384
385 /* fail after 0.1s */
386 timeout.tv_sec = 0;
387 timeout.tv_usec = 100000;
388
389 /* check whether fd is readable */
390 if( select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0 )
391 {
392 /* receive data */
393 ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen));
394
395 if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
396 {
397 ensure_out(rlen = uh_tcp_recv(cl, bufptr,
398 (int)(idxptr - bufptr) + 4));
399
400 /* header read complete ... */
401 blen -= rlen;
402 return uh_http_header_parse(cl, buffer,
403 sizeof(buffer) - blen - 1);
404 }
405 else
406 {
407 ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen));
408
409 /* unexpected eof - #7904 */
410 if( rlen == 0 )
411 return NULL;
412
413 blen -= rlen;
414 bufptr += rlen;
415 }
416 }
417 else
418 {
419 /* invalid request (unexpected eof/timeout) */
420 return NULL;
421 }
422 }
423
424 /* request entity too large */
425 uh_http_response(cl, 413, "Request Entity Too Large");
426
427 out:
428 return NULL;
429 }
430
431 #if defined(HAVE_LUA) || defined(HAVE_CGI)
432 static int uh_path_match(const char *prefix, const char *url)
433 {
434 if( (strstr(url, prefix) == url) &&
435 ((prefix[strlen(prefix)-1] == '/') ||
436 (strlen(url) == strlen(prefix)) ||
437 (url[strlen(prefix)] == '/'))
438 ) {
439 return 1;
440 }
441
442 return 0;
443 }
444 #endif
445
446 static void uh_dispatch_request(
447 struct client *cl, struct http_request *req, struct path_info *pin
448 ) {
449 #ifdef HAVE_CGI
450 struct interpreter *ipr = NULL;
451
452 if( uh_path_match(cl->server->conf->cgi_prefix, pin->name) ||
453 (ipr = uh_interpreter_lookup(pin->phys)) )
454 {
455 uh_cgi_request(cl, req, pin, ipr);
456 }
457 else
458 #endif
459 {
460 uh_file_request(cl, req, pin);
461 }
462 }
463
464 static void uh_mainloop(struct config *conf, fd_set serv_fds, int max_fd)
465 {
466 /* master file descriptor list */
467 fd_set used_fds, read_fds;
468
469 /* working structs */
470 struct http_request *req;
471 struct path_info *pin;
472 struct client *cl;
473
474 /* maximum file descriptor number */
475 int new_fd, cur_fd = 0;
476
477 /* clear the master and temp sets */
478 FD_ZERO(&used_fds);
479 FD_ZERO(&read_fds);
480
481 /* backup server descriptor set */
482 used_fds = serv_fds;
483
484 /* loop */
485 while(run)
486 {
487 /* create a working copy of the used fd set */
488 read_fds = used_fds;
489
490 /* sleep until socket activity */
491 if( select(max_fd + 1, &read_fds, NULL, NULL, NULL) == -1 )
492 {
493 perror("select()");
494 exit(1);
495 }
496
497 /* run through the existing connections looking for data to be read */
498 for( cur_fd = 0; cur_fd <= max_fd; cur_fd++ )
499 {
500 /* is a socket managed by us */
501 if( FD_ISSET(cur_fd, &read_fds) )
502 {
503 /* is one of our listen sockets */
504 if( FD_ISSET(cur_fd, &serv_fds) )
505 {
506 /* handle new connections */
507 if( (new_fd = accept(cur_fd, NULL, 0)) != -1 )
508 {
509 /* add to global client list */
510 if( (cl = uh_client_add(new_fd, uh_listener_lookup(cur_fd))) != NULL )
511 {
512 #ifdef HAVE_TLS
513 /* setup client tls context */
514 if( conf->tls )
515 conf->tls_accept(cl);
516 #endif
517
518 /* add client socket to global fdset */
519 FD_SET(new_fd, &used_fds);
520 fd_cloexec(new_fd);
521 max_fd = max(max_fd, new_fd);
522 }
523
524 /* insufficient resources */
525 else
526 {
527 fprintf(stderr,
528 "uh_client_add(): Cannot allocate memory\n");
529
530 close(new_fd);
531 }
532 }
533 }
534
535 /* is a client socket */
536 else
537 {
538 if( ! (cl = uh_client_lookup(cur_fd)) )
539 {
540 /* this should not happen! */
541 fprintf(stderr,
542 "uh_client_lookup(): No entry for fd %i!\n",
543 cur_fd);
544
545 goto cleanup;
546 }
547
548 /* parse message header */
549 if( (req = uh_http_header_recv(cl)) != NULL )
550 {
551 /* RFC1918 filtering required? */
552 if( conf->rfc1918_filter &&
553 sa_rfc1918(&cl->peeraddr) &&
554 !sa_rfc1918(&cl->servaddr) )
555 {
556 uh_http_sendhf(cl, 403, "Forbidden",
557 "Rejected request from RFC1918 IP "
558 "to public server address");
559 }
560 else
561 #ifdef HAVE_LUA
562 /* Lua request? */
563 if( conf->lua_state &&
564 uh_path_match(conf->lua_prefix, req->url) )
565 {
566 conf->lua_request(cl, req, conf->lua_state);
567 }
568 else
569 #endif
570 /* dispatch request */
571 if( (pin = uh_path_lookup(cl, req->url)) != NULL )
572 {
573 /* auth ok? */
574 if( !pin->redirected && uh_auth_check(cl, req, pin) )
575 uh_dispatch_request(cl, req, pin);
576 }
577
578 /* 404 */
579 else
580 {
581 /* Try to invoke an error handler */
582 pin = uh_path_lookup(cl, conf->error_handler);
583
584 if( pin && uh_auth_check(cl, req, pin) )
585 {
586 req->redirect_status = 404;
587 uh_dispatch_request(cl, req, pin);
588 }
589 else
590 {
591 uh_http_sendhf(cl, 404, "Not Found",
592 "No such file or directory");
593 }
594 }
595 }
596
597 #ifdef HAVE_TLS
598 /* free client tls context */
599 if( conf->tls )
600 conf->tls_close(cl);
601 #endif
602
603 cleanup:
604
605 /* close client socket */
606 close(cur_fd);
607 FD_CLR(cur_fd, &used_fds);
608
609 /* remove from global client list */
610 uh_client_remove(cur_fd);
611 }
612 }
613 }
614 }
615
616 #ifdef HAVE_LUA
617 /* destroy the Lua state */
618 if( conf->lua_state != NULL )
619 conf->lua_close(conf->lua_state);
620 #endif
621 }
622
623 #ifdef HAVE_TLS
624 static inline uh_inittls(struct config *conf)
625 {
626 /* library handle */
627 void *lib;
628
629 /* already loaded */
630 if( conf->tls != NULL )
631 return 0;
632
633 /* load TLS plugin */
634 if( ! (lib = dlopen("uhttpd_tls.so", RTLD_LAZY | RTLD_GLOBAL)) )
635 {
636 fprintf(stderr,
637 "Notice: Unable to load TLS plugin - disabling SSL support! "
638 "(Reason: %s)\n", dlerror()
639 );
640
641 return 1;
642 }
643 else
644 {
645 /* resolve functions */
646 if( !(conf->tls_init = dlsym(lib, "uh_tls_ctx_init")) ||
647 !(conf->tls_cert = dlsym(lib, "uh_tls_ctx_cert")) ||
648 !(conf->tls_key = dlsym(lib, "uh_tls_ctx_key")) ||
649 !(conf->tls_free = dlsym(lib, "uh_tls_ctx_free")) ||
650 !(conf->tls_accept = dlsym(lib, "uh_tls_client_accept")) ||
651 !(conf->tls_close = dlsym(lib, "uh_tls_client_close")) ||
652 !(conf->tls_recv = dlsym(lib, "uh_tls_client_recv")) ||
653 !(conf->tls_send = dlsym(lib, "uh_tls_client_send"))
654 ) {
655 fprintf(stderr,
656 "Error: Failed to lookup required symbols "
657 "in TLS plugin: %s\n", dlerror()
658 );
659 exit(1);
660 }
661
662 /* init SSL context */
663 if( ! (conf->tls = conf->tls_init()) )
664 {
665 fprintf(stderr, "Error: Failed to initalize SSL context\n");
666 exit(1);
667 }
668 }
669
670 return 0;
671 }
672 #endif
673
674 int main (int argc, char **argv)
675 {
676 /* master file descriptor list */
677 fd_set serv_fds;
678
679 /* working structs */
680 struct addrinfo hints;
681 struct sigaction sa;
682 struct config conf;
683
684 /* signal mask */
685 sigset_t ss;
686
687 /* maximum file descriptor number */
688 int cur_fd, max_fd = 0;
689
690 #ifdef HAVE_TLS
691 int tls = 0;
692 int keys = 0;
693 #endif
694
695 int bound = 0;
696 int nofork = 0;
697
698 /* args */
699 int opt;
700 char bind[128];
701 char *port = NULL;
702
703 #ifdef HAVE_LUA
704 /* library handle */
705 void *lib;
706 #endif
707
708 FD_ZERO(&serv_fds);
709
710 /* handle SIGPIPE, SIGINT, SIGTERM, SIGCHLD */
711 sa.sa_flags = 0;
712 sigemptyset(&sa.sa_mask);
713
714 sa.sa_handler = SIG_IGN;
715 sigaction(SIGPIPE, &sa, NULL);
716
717 sa.sa_handler = uh_sigchld;
718 sigaction(SIGCHLD, &sa, NULL);
719
720 sa.sa_handler = uh_sigterm;
721 sigaction(SIGINT, &sa, NULL);
722 sigaction(SIGTERM, &sa, NULL);
723
724 /* defer SIGCHLD */
725 sigemptyset(&ss);
726 sigaddset(&ss, SIGCHLD);
727 sigprocmask(SIG_BLOCK, &ss, NULL);
728
729 /* prepare addrinfo hints */
730 memset(&hints, 0, sizeof(hints));
731 hints.ai_family = AF_UNSPEC;
732 hints.ai_socktype = SOCK_STREAM;
733 hints.ai_flags = AI_PASSIVE;
734
735 /* parse args */
736 memset(&conf, 0, sizeof(conf));
737 memset(bind, 0, sizeof(bind));
738
739
740 while( (opt = getopt(argc, argv,
741 "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:x:i:t:T:A:")) > 0
742 ) {
743 switch(opt)
744 {
745 /* [addr:]port */
746 case 'p':
747 case 's':
748 if( (port = strrchr(optarg, ':')) != NULL )
749 {
750 if( (optarg[0] == '[') && (port > optarg) && (port[-1] == ']') )
751 memcpy(bind, optarg + 1,
752 min(sizeof(bind), (int)(port - optarg) - 2));
753 else
754 memcpy(bind, optarg,
755 min(sizeof(bind), (int)(port - optarg)));
756
757 port++;
758 }
759 else
760 {
761 port = optarg;
762 }
763
764 #ifdef HAVE_TLS
765 if( opt == 's' )
766 {
767 if( uh_inittls(&conf) )
768 {
769 fprintf(stderr,
770 "Notice: TLS support is disabled, "
771 "ignoring '-s %s'\n", optarg
772 );
773 continue;
774 }
775
776 tls = 1;
777 }
778 #endif
779
780 /* bind sockets */
781 bound += uh_socket_bind(
782 &serv_fds, &max_fd, bind[0] ? bind : NULL, port,
783 &hints, (opt == 's'), &conf
784 );
785
786 memset(bind, 0, sizeof(bind));
787 break;
788
789 #ifdef HAVE_TLS
790 /* certificate */
791 case 'C':
792 if( !uh_inittls(&conf) )
793 {
794 if( conf.tls_cert(conf.tls, optarg) < 1 )
795 {
796 fprintf(stderr,
797 "Error: Invalid certificate file given\n");
798 exit(1);
799 }
800
801 keys++;
802 }
803
804 break;
805
806 /* key */
807 case 'K':
808 if( !uh_inittls(&conf) )
809 {
810 if( conf.tls_key(conf.tls, optarg) < 1 )
811 {
812 fprintf(stderr,
813 "Error: Invalid private key file given\n");
814 exit(1);
815 }
816
817 keys++;
818 }
819
820 break;
821 #endif
822
823 /* docroot */
824 case 'h':
825 if( ! realpath(optarg, conf.docroot) )
826 {
827 fprintf(stderr, "Error: Invalid directory %s: %s\n",
828 optarg, strerror(errno));
829 exit(1);
830 }
831 break;
832
833 /* error handler */
834 case 'E':
835 if( (strlen(optarg) == 0) || (optarg[0] != '/') )
836 {
837 fprintf(stderr, "Error: Invalid error handler: %s\n",
838 optarg);
839 exit(1);
840 }
841 conf.error_handler = optarg;
842 break;
843
844 /* index file */
845 case 'I':
846 if( (strlen(optarg) == 0) || (optarg[0] == '/') )
847 {
848 fprintf(stderr, "Error: Invalid index page: %s\n",
849 optarg);
850 exit(1);
851 }
852 conf.index_file = optarg;
853 break;
854
855 /* don't follow symlinks */
856 case 'S':
857 conf.no_symlinks = 1;
858 break;
859
860 /* don't list directories */
861 case 'D':
862 conf.no_dirlists = 1;
863 break;
864
865 case 'R':
866 conf.rfc1918_filter = 1;
867 break;
868
869 #ifdef HAVE_CGI
870 /* cgi prefix */
871 case 'x':
872 conf.cgi_prefix = optarg;
873 break;
874
875 /* interpreter */
876 case 'i':
877 if( (optarg[0] == '.') && (port = strchr(optarg, '=')) )
878 {
879 *port++ = 0;
880 uh_interpreter_add(optarg, port);
881 }
882 else
883 {
884 fprintf(stderr, "Error: Invalid interpreter: %s\n",
885 optarg);
886 exit(1);
887 }
888 break;
889 #endif
890
891 #ifdef HAVE_LUA
892 /* lua prefix */
893 case 'l':
894 conf.lua_prefix = optarg;
895 break;
896
897 /* lua handler */
898 case 'L':
899 conf.lua_handler = optarg;
900 break;
901 #endif
902
903 #if defined(HAVE_CGI) || defined(HAVE_LUA)
904 /* script timeout */
905 case 't':
906 conf.script_timeout = atoi(optarg);
907 break;
908 #endif
909
910 /* network timeout */
911 case 'T':
912 conf.network_timeout = atoi(optarg);
913 break;
914
915 /* tcp keep-alive */
916 case 'A':
917 conf.tcp_keepalive = atoi(optarg);
918 break;
919
920 /* no fork */
921 case 'f':
922 nofork = 1;
923 break;
924
925 /* urldecode */
926 case 'd':
927 if( (port = malloc(strlen(optarg)+1)) != NULL )
928 {
929 /* "decode" plus to space to retain compat */
930 for (opt = 0; optarg[opt]; opt++)
931 if (optarg[opt] == '+')
932 optarg[opt] = ' ';
933
934 memset(port, 0, strlen(optarg)+1);
935 uh_urldecode(port, strlen(optarg), optarg, strlen(optarg));
936
937 printf("%s", port);
938 free(port);
939 exit(0);
940 }
941 break;
942
943 /* basic auth realm */
944 case 'r':
945 conf.realm = optarg;
946 break;
947
948 /* md5 crypt */
949 case 'm':
950 printf("%s\n", crypt(optarg, "$1$"));
951 exit(0);
952 break;
953
954 /* config file */
955 case 'c':
956 conf.file = optarg;
957 break;
958
959 default:
960 fprintf(stderr,
961 "Usage: %s -p [addr:]port [-h docroot]\n"
962 " -f Do not fork to background\n"
963 " -c file Configuration file, default is '/etc/httpd.conf'\n"
964 " -p [addr:]port Bind to specified address and port, multiple allowed\n"
965 #ifdef HAVE_TLS
966 " -s [addr:]port Like -p but provide HTTPS on this port\n"
967 " -C file ASN.1 server certificate file\n"
968 " -K file ASN.1 server private key file\n"
969 #endif
970 " -h directory Specify the document root, default is '.'\n"
971 " -E string Use given virtual URL as 404 error handler\n"
972 " -I string Use given filename as index page for directories\n"
973 " -S Do not follow symbolic links outside of the docroot\n"
974 " -D Do not allow directory listings, send 403 instead\n"
975 " -R Enable RFC1918 filter\n"
976 #ifdef HAVE_LUA
977 " -l string URL prefix for Lua handler, default is '/lua'\n"
978 " -L file Lua handler script, omit to disable Lua\n"
979 #endif
980 #ifdef HAVE_CGI
981 " -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
982 " -i .ext=path Use interpreter at path for files with the given extension\n"
983 #endif
984 #if defined(HAVE_CGI) || defined(HAVE_LUA)
985 " -t seconds CGI and Lua script timeout in seconds, default is 60\n"
986 #endif
987 " -T seconds Network timeout in seconds, default is 30\n"
988 " -d string URL decode given string\n"
989 " -r string Specify basic auth realm\n"
990 " -m string MD5 crypt given string\n"
991 "\n", argv[0]
992 );
993
994 exit(1);
995 }
996 }
997
998 #ifdef HAVE_TLS
999 if( (tls == 1) && (keys < 2) )
1000 {
1001 fprintf(stderr, "Error: Missing private key or certificate file\n");
1002 exit(1);
1003 }
1004 #endif
1005
1006 if( bound < 1 )
1007 {
1008 fprintf(stderr, "Error: No sockets bound, unable to continue\n");
1009 exit(1);
1010 }
1011
1012 /* default docroot */
1013 if( !conf.docroot[0] && !realpath(".", conf.docroot) )
1014 {
1015 fprintf(stderr, "Error: Can not determine default document root: %s\n",
1016 strerror(errno));
1017 exit(1);
1018 }
1019
1020 /* default realm */
1021 if( ! conf.realm )
1022 conf.realm = "Protected Area";
1023
1024 /* config file */
1025 uh_config_parse(&conf);
1026
1027 /* default network timeout */
1028 if( conf.network_timeout <= 0 )
1029 conf.network_timeout = 30;
1030
1031 #if defined(HAVE_CGI) || defined(HAVE_LUA)
1032 /* default script timeout */
1033 if( conf.script_timeout <= 0 )
1034 conf.script_timeout = 60;
1035 #endif
1036
1037 #ifdef HAVE_CGI
1038 /* default cgi prefix */
1039 if( ! conf.cgi_prefix )
1040 conf.cgi_prefix = "/cgi-bin";
1041 #endif
1042
1043 #ifdef HAVE_LUA
1044 /* load Lua plugin */
1045 if( ! (lib = dlopen("uhttpd_lua.so", RTLD_LAZY | RTLD_GLOBAL)) )
1046 {
1047 fprintf(stderr,
1048 "Notice: Unable to load Lua plugin - disabling Lua support! "
1049 "(Reason: %s)\n", dlerror()
1050 );
1051 }
1052 else
1053 {
1054 /* resolve functions */
1055 if( !(conf.lua_init = dlsym(lib, "uh_lua_init")) ||
1056 !(conf.lua_close = dlsym(lib, "uh_lua_close")) ||
1057 !(conf.lua_request = dlsym(lib, "uh_lua_request"))
1058 ) {
1059 fprintf(stderr,
1060 "Error: Failed to lookup required symbols "
1061 "in Lua plugin: %s\n", dlerror()
1062 );
1063 exit(1);
1064 }
1065
1066 /* init Lua runtime if handler is specified */
1067 if( conf.lua_handler )
1068 {
1069 /* default lua prefix */
1070 if( ! conf.lua_prefix )
1071 conf.lua_prefix = "/lua";
1072
1073 conf.lua_state = conf.lua_init(conf.lua_handler);
1074 }
1075 }
1076 #endif
1077
1078 /* fork (if not disabled) */
1079 if( ! nofork )
1080 {
1081 switch( fork() )
1082 {
1083 case -1:
1084 perror("fork()");
1085 exit(1);
1086
1087 case 0:
1088 /* daemon setup */
1089 if( chdir("/") )
1090 perror("chdir()");
1091
1092 if( (cur_fd = open("/dev/null", O_WRONLY)) > -1 )
1093 dup2(cur_fd, 0);
1094
1095 if( (cur_fd = open("/dev/null", O_RDONLY)) > -1 )
1096 dup2(cur_fd, 1);
1097
1098 if( (cur_fd = open("/dev/null", O_RDONLY)) > -1 )
1099 dup2(cur_fd, 2);
1100
1101 break;
1102
1103 default:
1104 exit(0);
1105 }
1106 }
1107
1108 /* server main loop */
1109 uh_mainloop(&conf, serv_fds, max_fd);
1110
1111 #ifdef HAVE_LUA
1112 /* destroy the Lua state */
1113 if( conf.lua_state != NULL )
1114 conf.lua_close(conf.lua_state);
1115 #endif
1116
1117 return 0;
1118 }
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