1 /* vi: set sw=4 ts=4: */
3 * httpd implementation for busybox
5 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
6 * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 *****************************************************************************
14 * httpd -p 8080 -h $HOME/public_html
15 * For daemon start from rc script with uid=0:
17 * which is equivalent to (assuming user www has uid 80):
18 * httpd -p 80 -u 80 -h $PWD -c /etc/httpd.conf -r "Web Server Authentication"
20 * When an url starts with "/cgi-bin/" it is assumed to be a cgi script.
21 * The server changes directory to the location of the script and executes it
22 * after setting QUERY_STRING and other environment variables.
24 * If directory URL is given, no index.html is found and CGI support is enabled,
25 * cgi-bin/index.cgi will be run. Directory to list is ../$QUERY_STRING.
26 * See httpd_indexcgi.c for an example GCI code.
29 * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
31 * The applet can also be invoked as an url arg decoder and html text encoder
33 * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
34 * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
35 * Note that url encoding for arguments is not the same as html encoding for
36 * presentation. -d decodes an url-encoded argument while -e encodes in html
39 * httpd.conf has the following format:
41 * H:/serverroot # define the server root. It will override -h
42 * A:172.20. # Allow address from 172.20.0.0/16
43 * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
44 * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
45 * A:127.0.0.1 # Allow local loopback connections
46 * D:* # Deny from other IP connections
47 * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
48 * I:index.html # Show index.html when a directory is requested
50 * P:/url:[http://]hostname[:port]/new/path
51 * # When /urlXXXXXX is requested, reverse proxy
52 * # it to http://hostname[:port]/new/pathXXXXXX
54 * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
55 * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
56 * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
57 * /adm:root:* # or user root, pwd from /etc/passwd on urls starting with /adm/
58 * /wiki:*:* # or any user from /etc/passwd with according pwd on urls starting with /wiki/
59 * .au:audio/basic # additional mime type for audio.au files
60 * *.php:/path/php # run xxx.php through an interpreter
62 * A/D may be as a/d or allow/deny - only first char matters.
63 * Deny/Allow IP logic:
64 * - Default is to allow all (Allow all (A:*) is a no-op).
65 * - Deny rules take precedence over allow rules.
66 * - "Deny all" rule (D:*) is applied last.
69 * 1. Allow only specified addresses
70 * A:172.20 # Allow any address that begins with 172.20.
71 * A:10.10. # Allow any address that begins with 10.10.
72 * A:127.0.0.1 # Allow local loopback connections
73 * D:* # Deny from other IP connections
75 * 2. Only deny specified addresses
76 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
77 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
78 * A:* # (optional line added for clarity)
80 * If a sub directory contains config file, it is parsed and merged with
81 * any existing settings as if it was appended to the original configuration.
83 * subdir paths are relative to the containing subdir and thus cannot
84 * affect the parent rules.
86 * Note that since the sub dir is parsed in the forked thread servicing the
87 * subdir http request, any merge is discarded when the process exits. As a
88 * result, the subdir settings only have a lifetime of a single request.
90 * Custom error pages can contain an absolute path or be relative to
91 * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
92 * page can only be defined in the root configuration file and are not taken
93 * into account in local (directories) config files.
95 * If -c is not set, an attempt will be made to open the default
96 * root configuration file. If -c is set and the file is not found, the
97 * server exits with an error.
100 /* TODO: use TCP_CORK, parse_config() */
102 //usage:#define httpd_trivial_usage
104 //usage: " [-c CONFFILE]"
105 //usage: " [-p [IP:]PORT]"
106 //usage: IF_FEATURE_HTTPD_SETUID(" [-u USER[:GRP]]")
107 //usage: IF_FEATURE_HTTPD_BASIC_AUTH(" [-r REALM]")
108 //usage: " [-h HOME]\n"
109 //usage: "or httpd -d/-e" IF_FEATURE_HTTPD_AUTH_MD5("/-m") " STRING"
110 //usage:#define httpd_full_usage "\n\n"
111 //usage: "Listen for incoming HTTP requests\n"
112 //usage: "\n -i Inetd mode"
113 //usage: "\n -f Don't daemonize"
114 //usage: "\n -v[v] Verbose"
115 //usage: "\n -p [IP:]PORT Bind to IP:PORT (default *:80)"
116 //usage: IF_FEATURE_HTTPD_SETUID(
117 //usage: "\n -u USER[:GRP] Set uid/gid after binding to port")
118 //usage: IF_FEATURE_HTTPD_BASIC_AUTH(
119 //usage: "\n -r REALM Authentication Realm for Basic Authentication")
120 //usage: "\n -h HOME Home directory (default .)"
121 //usage: "\n -c FILE Configuration file (default {/etc,HOME}/httpd.conf)"
122 //usage: IF_FEATURE_HTTPD_AUTH_MD5(
123 //usage: "\n -m STRING MD5 crypt STRING")
124 //usage: "\n -e STRING HTML encode STRING"
125 //usage: "\n -d STRING URL decode STRING"
129 /* PAM may include <locale.h>. We may need to undefine bbox's stub define: */
131 /* For some obscure reason, PAM is not in pam/xxx, but in security/xxx.
132 * Apparently they like to confuse people. */
133 # include <security/pam_appl.h>
134 # include <security/pam_misc.h>
136 #if ENABLE_FEATURE_USE_SENDFILE
137 # include <sys/sendfile.h>
139 /* amount of buffering in a pipe */
141 # define PIPE_BUF 4096
146 #define IOBUF_SIZE 8192
147 #if PIPE_BUF >= IOBUF_SIZE
148 # error "PIPE_BUF >= IOBUF_SIZE"
151 #define HEADER_READ_TIMEOUT 60
153 static const char DEFAULT_PATH_HTTPD_CONF
[] ALIGN1
= "/etc";
154 static const char HTTPD_CONF
[] ALIGN1
= "httpd.conf";
155 static const char HTTP_200
[] ALIGN1
= "HTTP/1.0 200 OK\r\n";
156 static const char index_html
[] ALIGN1
= "index.html";
158 typedef struct has_next_ptr
{
159 struct has_next_ptr
*next
;
162 /* Must have "next" as a first member */
163 typedef struct Htaccess
{
164 struct Htaccess
*next
;
166 char before_colon
[1]; /* really bigger, must be last */
169 /* Must have "next" as a first member */
170 typedef struct Htaccess_IP
{
171 struct Htaccess_IP
*next
;
177 /* Must have "next" as a first member */
178 typedef struct Htaccess_Proxy
{
179 struct Htaccess_Proxy
*next
;
187 HTTP_PARTIAL_CONTENT
= 206,
188 HTTP_MOVED_TEMPORARILY
= 302,
189 HTTP_BAD_REQUEST
= 400, /* malformed syntax */
190 HTTP_UNAUTHORIZED
= 401, /* authentication needed, respond with auth hdr */
191 HTTP_NOT_FOUND
= 404,
192 HTTP_FORBIDDEN
= 403,
193 HTTP_REQUEST_TIMEOUT
= 408,
194 HTTP_NOT_IMPLEMENTED
= 501, /* used for unrecognized requests */
195 HTTP_INTERNAL_SERVER_ERROR
= 500,
197 #if 0 /* future use */
198 HTTP_SWITCHING_PROTOCOLS
= 101,
201 HTTP_NON_AUTHORITATIVE_INFO
= 203,
202 HTTP_NO_CONTENT
= 204,
203 HTTP_MULTIPLE_CHOICES
= 300,
204 HTTP_MOVED_PERMANENTLY
= 301,
205 HTTP_NOT_MODIFIED
= 304,
206 HTTP_PAYMENT_REQUIRED
= 402,
207 HTTP_BAD_GATEWAY
= 502,
208 HTTP_SERVICE_UNAVAILABLE
= 503, /* overload, maintenance */
212 static const uint16_t http_response_type
[] ALIGN2
= {
214 #if ENABLE_FEATURE_HTTPD_RANGES
215 HTTP_PARTIAL_CONTENT
,
217 HTTP_MOVED_TEMPORARILY
,
218 HTTP_REQUEST_TIMEOUT
,
219 HTTP_NOT_IMPLEMENTED
,
220 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
226 HTTP_INTERNAL_SERVER_ERROR
,
227 #if 0 /* not implemented */
231 HTTP_MULTIPLE_CHOICES
,
232 HTTP_MOVED_PERMANENTLY
,
235 HTTP_SERVICE_UNAVAILABLE
,
239 static const struct {
242 } http_response
[ARRAY_SIZE(http_response_type
)] = {
244 #if ENABLE_FEATURE_HTTPD_RANGES
245 { "Partial Content", NULL
},
248 { "Request Timeout", "No request appeared within 60 seconds" },
249 { "Not Implemented", "The requested method is not recognized" },
250 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
251 { "Unauthorized", "" },
253 { "Not Found", "The requested URL was not found" },
254 { "Bad Request", "Unsupported method" },
256 { "Internal Server Error", "Internal Server Error" },
257 #if 0 /* not implemented */
261 { "Multiple Choices" },
262 { "Moved Permanently" },
264 { "Bad Gateway", "" },
265 { "Service Unavailable", "" },
270 int verbose
; /* must be int (used by getopt32) */
271 smallint flg_deny_all
;
273 unsigned rmt_ip
; /* used for IP-based allow/deny rules */
275 char *rmt_ip_str
; /* for $REMOTE_ADDR and $REMOTE_PORT */
276 const char *bind_addr_or_port
;
279 const char *opt_c_configFile
;
280 const char *home_httpd
;
281 const char *index_page
;
283 const char *found_mime_type
;
284 const char *found_moved_temporarily
;
285 Htaccess_IP
*ip_a_d
; /* config allow/deny lines */
287 IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm
;)
288 IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser
;)
289 IF_FEATURE_HTTPD_CGI(char *referer
;)
290 IF_FEATURE_HTTPD_CGI(char *user_agent
;)
291 IF_FEATURE_HTTPD_CGI(char *host
;)
292 IF_FEATURE_HTTPD_CGI(char *http_accept
;)
293 IF_FEATURE_HTTPD_CGI(char *http_accept_language
;)
295 off_t file_size
; /* -1 - unknown */
296 #if ENABLE_FEATURE_HTTPD_RANGES
302 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
303 Htaccess
*g_auth
; /* config user:password lines */
305 Htaccess
*mime_a
; /* config mime types */
306 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
307 Htaccess
*script_i
; /* config script interpreters */
309 char *iobuf
; /* [IOBUF_SIZE] */
310 #define hdr_buf bb_common_bufsiz1
313 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
314 const char *http_error_page
[ARRAY_SIZE(http_response_type
)];
316 #if ENABLE_FEATURE_HTTPD_PROXY
317 Htaccess_Proxy
*proxy
;
319 #if ENABLE_FEATURE_HTTPD_GZIP
320 /* client can handle gzip / we are going to send gzip */
321 smallint content_gzip
;
324 #define G (*ptr_to_globals)
325 #define verbose (G.verbose )
326 #define flg_deny_all (G.flg_deny_all )
327 #define rmt_ip (G.rmt_ip )
328 #define bind_addr_or_port (G.bind_addr_or_port)
329 #define g_query (G.g_query )
330 #define opt_c_configFile (G.opt_c_configFile )
331 #define home_httpd (G.home_httpd )
332 #define index_page (G.index_page )
333 #define found_mime_type (G.found_mime_type )
334 #define found_moved_temporarily (G.found_moved_temporarily)
335 #define last_mod (G.last_mod )
336 #define ip_a_d (G.ip_a_d )
337 #define g_realm (G.g_realm )
338 #define remoteuser (G.remoteuser )
339 #define referer (G.referer )
340 #define user_agent (G.user_agent )
341 #define host (G.host )
342 #define http_accept (G.http_accept )
343 #define http_accept_language (G.http_accept_language)
344 #define file_size (G.file_size )
345 #if ENABLE_FEATURE_HTTPD_RANGES
346 #define range_start (G.range_start )
347 #define range_end (G.range_end )
348 #define range_len (G.range_len )
352 range_end
= MAXINT(off_t
) - 1,
353 range_len
= MAXINT(off_t
),
356 #define rmt_ip_str (G.rmt_ip_str )
357 #define g_auth (G.g_auth )
358 #define mime_a (G.mime_a )
359 #define script_i (G.script_i )
360 #define iobuf (G.iobuf )
361 #define hdr_ptr (G.hdr_ptr )
362 #define hdr_cnt (G.hdr_cnt )
363 #define http_error_page (G.http_error_page )
364 #define proxy (G.proxy )
365 #if ENABLE_FEATURE_HTTPD_GZIP
366 # define content_gzip (G.content_gzip )
368 # define content_gzip 0
370 #define INIT_G() do { \
371 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
372 IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
373 IF_FEATURE_HTTPD_RANGES(range_start = -1;) \
374 bind_addr_or_port = "80"; \
375 index_page = index_html; \
380 #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
384 SEND_HEADERS
= (1 << 0),
385 SEND_BODY
= (1 << 1),
386 SEND_HEADERS_AND_BODY
= SEND_HEADERS
+ SEND_BODY
,
388 static void send_file_and_exit(const char *url
, int what
) NORETURN
;
390 static void free_llist(has_next_ptr
**pptr
)
392 has_next_ptr
*cur
= *pptr
;
394 has_next_ptr
*t
= cur
;
401 static ALWAYS_INLINE
void free_Htaccess_list(Htaccess
**pptr
)
403 free_llist((has_next_ptr
**)pptr
);
406 static ALWAYS_INLINE
void free_Htaccess_IP_list(Htaccess_IP
**pptr
)
408 free_llist((has_next_ptr
**)pptr
);
411 /* Returns presumed mask width in bits or < 0 on error.
412 * Updates strp, stores IP at provided pointer */
413 static int scan_ip(const char **strp
, unsigned *ipp
, unsigned char endc
)
415 const char *p
= *strp
;
423 for (j
= 0; j
< 4; j
++) {
426 if ((*p
< '0' || *p
> '9') && *p
!= '/' && *p
)
429 while (*p
>= '0' && *p
<= '9') {
440 ip
= (ip
<< 8) | octet
;
454 /* Returns 0 on success. Stores IP and mask at provided pointers */
455 static int scan_ip_mask(const char *str
, unsigned *ipp
, unsigned *maskp
)
461 i
= scan_ip(&str
, ipp
, '/');
466 /* there is /xxx after dotted-IP address */
467 i
= bb_strtou(str
, &p
, 10);
469 /* 'xxx' itself is dotted-IP mask, parse it */
470 /* (return 0 (success) only if it has N.N.N.N form) */
471 return scan_ip(&str
, maskp
, '\0') - 32;
480 if (sizeof(unsigned) == 4 && i
== 32) {
481 /* mask >>= 32 below may not work */
487 /* i == 0 -> *maskp = 0x00000000
488 * i == 1 -> *maskp = 0x80000000
489 * i == 4 -> *maskp = 0xf0000000
490 * i == 31 -> *maskp = 0xfffffffe
491 * i == 32 -> *maskp = 0xffffffff */
492 *maskp
= (uint32_t)(~mask
);
497 * Parse configuration file into in-memory linked list.
499 * Any previous IP rules are discarded.
500 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
501 * are also discarded. That is, previous settings are retained if flag is
503 * Error pages are only parsed on the main config file.
505 * path Path where to look for httpd.conf (without filename).
506 * flag Type of the parse request.
510 FIRST_PARSE
= 0, /* path will be "/etc" */
511 SIGNALED_PARSE
= 1, /* path will be "/etc" */
512 SUBDIR_PARSE
= 2, /* path will be derived from URL */
514 static void parse_conf(const char *path
, int flag
)
516 /* internally used extra flag state */
517 enum { TRY_CURDIR_PARSE
= 3 };
520 const char *filename
;
523 /* discard old rules */
524 free_Htaccess_IP_list(&ip_a_d
);
526 /* retain previous auth and mime config only for subdir parse */
527 if (flag
!= SUBDIR_PARSE
) {
528 free_Htaccess_list(&mime_a
);
529 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
530 free_Htaccess_list(&g_auth
);
532 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
533 free_Htaccess_list(&script_i
);
537 filename
= opt_c_configFile
;
538 if (flag
== SUBDIR_PARSE
|| filename
== NULL
) {
539 filename
= alloca(strlen(path
) + sizeof(HTTPD_CONF
) + 2);
540 sprintf((char *)filename
, "%s/%s", path
, HTTPD_CONF
);
543 while ((f
= fopen_for_read(filename
)) == NULL
) {
544 if (flag
>= SUBDIR_PARSE
) { /* SUBDIR or TRY_CURDIR */
545 /* config file not found, no changes to config */
548 if (flag
== FIRST_PARSE
) {
549 /* -c CONFFILE given, but CONFFILE doesn't exist? */
550 if (opt_c_configFile
)
551 bb_simple_perror_msg_and_die(opt_c_configFile
);
552 /* else: no -c, thus we looked at /etc/httpd.conf,
553 * and it's not there. try ./httpd.conf: */
555 flag
= TRY_CURDIR_PARSE
;
556 filename
= HTTPD_CONF
;
559 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
560 /* in "/file:user:pass" lines, we prepend path in subdirs */
561 if (flag
!= SUBDIR_PARSE
)
566 * I:default_index_file
568 * [AD]:IP[/mask] # allow/deny, * for wildcard
569 * Ennn:error.html # error page for status nnn
570 * P:/url:[http://]hostname[:port]/new/path # reverse proxy
571 * .ext:mime/type # mime type
572 * *.php:/path/php # run xxx.php through an interpreter
573 * /file:user:pass # username and password
575 while (fgets(buf
, sizeof(buf
), f
) != NULL
) {
580 { /* remove all whitespace, and # comments */
584 /* skip non-whitespace beginning. Often the whole line
585 * is non-whitespace. We want this case to work fast,
586 * without needless copying, therefore we don't merge
587 * this operation into next while loop. */
588 while ((ch
= *p0
) != '\0' && ch
!= '\n' && ch
!= '#'
589 && ch
!= ' ' && ch
!= '\t'
594 /* if we enter this loop, we have some whitespace.
596 while (ch
!= '\0' && ch
!= '\n' && ch
!= '#') {
597 if (ch
!= ' ' && ch
!= '\t') {
603 strlen_buf
= p
- buf
;
605 continue; /* empty line */
608 after_colon
= strchr(buf
, ':');
610 if (after_colon
== NULL
|| *++after_colon
== '\0')
613 ch
= (buf
[0] & ~0x20); /* toupper if it's a letter */
616 if (index_page
!= index_html
)
617 free((char*)index_page
);
618 index_page
= xstrdup(after_colon
);
622 /* do not allow jumping around using H in subdir's configs */
623 if (flag
== FIRST_PARSE
&& ch
== 'H') {
624 home_httpd
= xstrdup(after_colon
);
629 if (ch
== 'A' || ch
== 'D') {
632 if (*after_colon
== '*') {
634 /* memorize "deny all" */
637 /* skip assumed "A:*", it is a default anyway */
640 /* store "allow/deny IP/mask" line */
641 pip
= xzalloc(sizeof(*pip
));
642 if (scan_ip_mask(after_colon
, &pip
->ip
, &pip
->mask
)) {
643 /* IP{/mask} syntax error detected, protect all */
647 pip
->allow_deny
= ch
;
649 /* Deny:from_IP - prepend */
653 /* A:from_IP - append (thus all D's precedes A's) */
654 Htaccess_IP
*prev_IP
= ip_a_d
;
655 if (prev_IP
== NULL
) {
658 while (prev_IP
->next
)
659 prev_IP
= prev_IP
->next
;
666 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
667 if (flag
== FIRST_PARSE
&& ch
== 'E') {
669 int status
= atoi(buf
+ 1); /* error status code */
671 if (status
< HTTP_CONTINUE
) {
674 /* then error page; find matching status */
675 for (i
= 0; i
< ARRAY_SIZE(http_response_type
); i
++) {
676 if (http_response_type
[i
] == status
) {
677 /* We chdir to home_httpd, thus no need to
678 * concat_path_file(home_httpd, after_colon)
680 http_error_page
[i
] = xstrdup(after_colon
);
688 #if ENABLE_FEATURE_HTTPD_PROXY
689 if (flag
== FIRST_PARSE
&& ch
== 'P') {
690 /* P:/url:[http://]hostname[:port]/new/path */
691 char *url_from
, *host_port
, *url_to
;
692 Htaccess_Proxy
*proxy_entry
;
694 url_from
= after_colon
;
695 host_port
= strchr(after_colon
, ':');
696 if (host_port
== NULL
) {
700 if (strncmp(host_port
, "http://", 7) == 0)
702 if (*host_port
== '\0') {
705 url_to
= strchr(host_port
, '/');
706 if (url_to
== NULL
) {
710 proxy_entry
= xzalloc(sizeof(*proxy_entry
));
711 proxy_entry
->url_from
= xstrdup(url_from
);
712 proxy_entry
->host_port
= xstrdup(host_port
);
714 proxy_entry
->url_to
= xstrdup(url_to
);
715 proxy_entry
->next
= proxy
;
720 /* the rest of directives are non-alphabetic,
721 * must avoid using "toupper'ed" ch */
724 if (ch
== '.' /* ".ext:mime/type" */
725 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
726 || (ch
== '*' && buf
[1] == '.') /* "*.php:/path/php" */
732 cur
= xzalloc(sizeof(*cur
) /* includes space for NUL */ + strlen_buf
);
733 strcpy(cur
->before_colon
, buf
);
734 p
= cur
->before_colon
+ (after_colon
- buf
);
736 cur
->after_colon
= p
;
738 /* .mime line: prepend to mime_a list */
742 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
744 /* script interpreter line: prepend to script_i list */
745 cur
->next
= script_i
;
752 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
753 if (ch
== '/') { /* "/file:user:pass" */
758 /* note: path is "" unless we are in SUBDIR parse,
759 * otherwise it does NOT start with "/" */
760 cur
= xzalloc(sizeof(*cur
) /* includes space for NUL */
764 /* form "/path/file" */
765 sprintf(cur
->before_colon
, "/%s%.*s",
767 (int) (after_colon
- buf
- 1), /* includes "/", but not ":" */
769 /* canonicalize it */
770 p
= bb_simplify_abs_path_inplace(cur
->before_colon
);
771 file_len
= p
- cur
->before_colon
;
772 /* add "user:pass" after NUL */
773 strcpy(++p
, after_colon
);
774 cur
->after_colon
= p
;
776 /* insert cur into g_auth */
777 /* g_auth is sorted by decreased filename length */
779 Htaccess
*auth
, **authp
;
782 while ((auth
= *authp
) != NULL
) {
783 if (file_len
>= strlen(auth
->before_colon
)) {
784 /* insert cur before auth */
794 #endif /* BASIC_AUTH */
796 /* the line is not recognized */
798 bb_error_msg("config error '%s' in '%s'", buf
, filename
);
799 } /* while (fgets) */
804 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
806 * Given a string, html-encode special characters.
807 * This is used for the -e command line option to provide an easy way
808 * for scripts to encode result data without confusing browsers. The
809 * returned string pointer is memory allocated by malloc().
811 * Returns a pointer to the encoded string (malloced).
813 static char *encodeString(const char *string
)
815 /* take the simple route and encode everything */
816 /* could possibly scan once to get length. */
817 int len
= strlen(string
);
818 char *out
= xmalloc(len
* 6 + 1);
822 while ((ch
= *string
++) != '\0') {
823 /* very simple check for what to encode */
827 p
+= sprintf(p
, "&#%d;", (unsigned char) ch
);
834 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
836 * Decode a base64 data stream as per rfc1521.
837 * Note that the rfc states that non base64 chars are to be ignored.
838 * Since the decode always results in a shorter size than the input,
839 * it is OK to pass the input arg as an output arg.
840 * Parameter: a pointer to a base64 encoded string.
841 * Decoded data is stored in-place.
843 static void decodeBase64(char *Data
)
845 const unsigned char *in
= (const unsigned char *)Data
;
846 /* The decoded size will be at most 3/4 the size of the encoded */
853 if (t
>= '0' && t
<= '9')
855 else if (t
>= 'A' && t
<= 'Z')
857 else if (t
>= 'a' && t
<= 'z')
871 *Data
++ = (char) (ch
>> 16);
872 *Data
++ = (char) (ch
>> 8);
882 * Create a listen server socket on the designated port.
884 static int openServer(void)
886 unsigned n
= bb_strtou(bind_addr_or_port
, NULL
, 10);
887 if (!errno
&& n
&& n
<= 0xffff)
888 n
= create_and_bind_stream_or_die(NULL
, n
);
890 n
= create_and_bind_stream_or_die(bind_addr_or_port
, 80);
896 * Log the connection closure and exit.
898 static void log_and_exit(void) NORETURN
;
899 static void log_and_exit(void)
901 /* Paranoia. IE said to be buggy. It may send some extra data
902 * or be confused by us just exiting without SHUT_WR. Oh well. */
903 shutdown(1, SHUT_WR
);
905 (this also messes up stdin when user runs httpd -i from terminal)
907 while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
912 bb_error_msg("closed");
913 _exit(xfunc_error_retval
);
917 * Create and send HTTP response headers.
918 * The arguments are combined and sent as one write operation. Note that
919 * IE will puke big-time if the headers are not sent in one packet and the
920 * second packet is delayed for any reason.
921 * responseNum - the result code to send.
923 static void send_headers(int responseNum
)
925 static const char RFC1123FMT
[] ALIGN1
= "%a, %d %b %Y %H:%M:%S GMT";
927 const char *responseString
= "";
928 const char *infoString
= NULL
;
929 const char *mime_type
;
930 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
931 const char *error_page
= NULL
;
934 time_t timer
= time(NULL
);
938 for (i
= 0; i
< ARRAY_SIZE(http_response_type
); i
++) {
939 if (http_response_type
[i
] == responseNum
) {
940 responseString
= http_response
[i
].name
;
941 infoString
= http_response
[i
].info
;
942 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
943 error_page
= http_error_page
[i
];
948 /* error message is HTML */
949 mime_type
= responseNum
== HTTP_OK
?
950 found_mime_type
: "text/html";
953 bb_error_msg("response:%u", responseNum
);
955 /* emit the current date */
956 strftime(tmp_str
, sizeof(tmp_str
), RFC1123FMT
, gmtime(&timer
));
958 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
959 "Date: %s\r\nConnection: close\r\n",
960 responseNum
, responseString
, mime_type
, tmp_str
);
962 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
963 if (responseNum
== HTTP_UNAUTHORIZED
) {
964 len
+= sprintf(iobuf
+ len
,
965 "WWW-Authenticate: Basic realm=\"%s\"\r\n",
969 if (responseNum
== HTTP_MOVED_TEMPORARILY
) {
970 len
+= sprintf(iobuf
+ len
, "Location: %s/%s%s\r\n",
971 found_moved_temporarily
,
972 (g_query
? "?" : ""),
973 (g_query
? g_query
: ""));
976 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
977 if (error_page
&& access(error_page
, R_OK
) == 0) {
978 strcat(iobuf
, "\r\n");
982 fprintf(stderr
, "headers: '%s'\n", iobuf
);
983 full_write(STDOUT_FILENO
, iobuf
, len
);
985 fprintf(stderr
, "writing error page: '%s'\n", error_page
);
986 return send_file_and_exit(error_page
, SEND_BODY
);
990 if (file_size
!= -1) { /* file */
991 strftime(tmp_str
, sizeof(tmp_str
), RFC1123FMT
, gmtime(&last_mod
));
992 #if ENABLE_FEATURE_HTTPD_RANGES
993 if (responseNum
== HTTP_PARTIAL_CONTENT
) {
994 len
+= sprintf(iobuf
+ len
, "Content-Range: bytes %"OFF_FMT
"u-%"OFF_FMT
"u/%"OFF_FMT
"u\r\n",
998 file_size
= range_end
- range_start
+ 1;
1001 len
+= sprintf(iobuf
+ len
,
1002 #if ENABLE_FEATURE_HTTPD_RANGES
1003 "Accept-Ranges: bytes\r\n"
1005 "Last-Modified: %s\r\n%s %"OFF_FMT
"u\r\n",
1007 content_gzip
? "Transfer-length:" : "Content-length:",
1013 len
+= sprintf(iobuf
+ len
, "Content-Encoding: gzip\r\n");
1015 iobuf
[len
++] = '\r';
1016 iobuf
[len
++] = '\n';
1018 len
+= sprintf(iobuf
+ len
,
1019 "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
1020 "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
1021 responseNum
, responseString
,
1022 responseNum
, responseString
, infoString
);
1025 fprintf(stderr
, "headers: '%s'\n", iobuf
);
1026 if (full_write(STDOUT_FILENO
, iobuf
, len
) != len
) {
1028 bb_perror_msg("error");
1033 static void send_headers_and_exit(int responseNum
) NORETURN
;
1034 static void send_headers_and_exit(int responseNum
)
1036 IF_FEATURE_HTTPD_GZIP(content_gzip
= 0;)
1037 send_headers(responseNum
);
1042 * Read from the socket until '\n' or EOF. '\r' chars are removed.
1043 * '\n' is replaced with NUL.
1044 * Return number of characters read or 0 if nothing is read
1045 * ('\r' and '\n' are not counted).
1046 * Data is returned in iobuf.
1048 static int get_line(void)
1053 alarm(HEADER_READ_TIMEOUT
);
1056 hdr_cnt
= safe_read(STDIN_FILENO
, hdr_buf
, sizeof(hdr_buf
));
1061 iobuf
[count
] = c
= *hdr_ptr
++;
1067 iobuf
[count
] = '\0';
1070 if (count
< (IOBUF_SIZE
- 1)) /* check overflow */
1076 #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
1078 /* gcc 4.2.1 fares better with NOINLINE */
1079 static NOINLINE
void cgi_io_loop_and_exit(int fromCgi_rd
, int toCgi_wr
, int post_len
) NORETURN
;
1080 static NOINLINE
void cgi_io_loop_and_exit(int fromCgi_rd
, int toCgi_wr
, int post_len
)
1082 enum { FROM_CGI
= 1, TO_CGI
= 2 }; /* indexes in pfd[] */
1083 struct pollfd pfd
[3];
1084 int out_cnt
; /* we buffer a bit of initial CGI output */
1087 /* iobuf is used for CGI -> network data,
1088 * hdr_buf is for network -> CGI data (POSTDATA) */
1090 /* If CGI dies, we still want to correctly finish reading its output
1091 * and send it to the peer. So please no SIGPIPEs! */
1092 signal(SIGPIPE
, SIG_IGN
);
1094 // We inconsistently handle a case when more POSTDATA from network
1095 // is coming than we expected. We may give *some part* of that
1096 // extra data to CGI.
1098 //if (hdr_cnt > post_len) {
1099 // /* We got more POSTDATA from network than we expected */
1100 // hdr_cnt = post_len;
1102 post_len
-= hdr_cnt
;
1103 /* post_len - number of POST bytes not yet read from network */
1105 /* NB: breaking out of this loop jumps to log_and_exit() */
1107 pfd
[FROM_CGI
].fd
= fromCgi_rd
;
1108 pfd
[FROM_CGI
].events
= POLLIN
;
1109 pfd
[TO_CGI
].fd
= toCgi_wr
;
1111 /* Note: even pfd[0].events == 0 won't prevent
1112 * revents == POLLHUP|POLLERR reports from closed stdin.
1113 * Setting fd to -1 works: */
1115 pfd
[0].events
= POLLIN
;
1116 pfd
[0].revents
= 0; /* probably not needed, paranoia */
1118 /* We always poll this fd, thus kernel always sets revents: */
1119 /*pfd[FROM_CGI].events = POLLIN; - moved out of loop */
1120 /*pfd[FROM_CGI].revents = 0; - not needed */
1122 /* gcc-4.8.0 still doesnt fill two shorts with one insn :( */
1123 /* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47059 */
1124 /* hopefully one day it will... */
1125 pfd
[TO_CGI
].events
= POLLOUT
;
1126 pfd
[TO_CGI
].revents
= 0; /* needed! */
1128 if (toCgi_wr
&& hdr_cnt
<= 0) {
1130 /* Expect more POST data from network */
1133 /* post_len <= 0 && hdr_cnt <= 0:
1134 * no more POST data to CGI,
1135 * let CGI see EOF on CGI's stdin */
1136 if (toCgi_wr
!= fromCgi_rd
)
1142 /* Now wait on the set of sockets */
1143 count
= safe_poll(pfd
, hdr_cnt
> 0 ? TO_CGI
+1 : FROM_CGI
+1, -1);
1146 if (safe_waitpid(pid
, &status
, WNOHANG
) <= 0) {
1147 /* Weird. CGI didn't exit and no fd's
1148 * are ready, yet poll returned?! */
1151 if (DEBUG
&& WIFEXITED(status
))
1152 bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status
));
1153 if (DEBUG
&& WIFSIGNALED(status
))
1154 bb_error_msg("CGI killed, signal=%d", WTERMSIG(status
));
1159 if (pfd
[TO_CGI
].revents
) {
1160 /* hdr_cnt > 0 here due to the way poll() called */
1161 /* Have data from peer and can write to CGI */
1162 count
= safe_write(toCgi_wr
, hdr_ptr
, hdr_cnt
);
1163 /* Doesn't happen, we dont use nonblocking IO here
1164 *if (count < 0 && errno == EAGAIN) {
1171 /* EOF/broken pipe to CGI, stop piping POST data */
1172 hdr_cnt
= post_len
= 0;
1176 if (pfd
[0].revents
) {
1177 /* post_len > 0 && hdr_cnt == 0 here */
1178 /* We expect data, prev data portion is eaten by CGI
1179 * and there *is* data to read from the peer
1181 //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
1182 //count = safe_read(STDIN_FILENO, hdr_buf, count);
1183 count
= safe_read(STDIN_FILENO
, hdr_buf
, sizeof(hdr_buf
));
1189 /* no more POST data can be read */
1194 if (pfd
[FROM_CGI
].revents
) {
1195 /* There is something to read from CGI */
1198 /* Are we still buffering CGI output? */
1200 /* HTTP_200[] has single "\r\n" at the end.
1201 * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
1202 * CGI scripts MUST send their own header terminated by
1203 * empty line, then data. That's why we have only one
1204 * <cr><lf> pair here. We will output "200 OK" line
1205 * if needed, but CGI still has to provide blank line
1206 * between header and body */
1208 /* Must use safe_read, not full_read, because
1209 * CGI may output a few first bytes and then wait
1210 * for POSTDATA without closing stdout.
1211 * With full_read we may wait here forever. */
1212 count
= safe_read(fromCgi_rd
, rbuf
+ out_cnt
, PIPE_BUF
- 8);
1214 /* eof (or error) and there was no "HTTP",
1215 * so write it, then write received data */
1217 full_write(STDOUT_FILENO
, HTTP_200
, sizeof(HTTP_200
)-1);
1218 full_write(STDOUT_FILENO
, rbuf
, out_cnt
);
1220 break; /* CGI stdout is closed, exiting */
1224 /* "Status" header format is: "Status: 302 Redirected\r\n" */
1225 if (out_cnt
>= 8 && memcmp(rbuf
, "Status: ", 8) == 0) {
1226 /* send "HTTP/1.0 " */
1227 if (full_write(STDOUT_FILENO
, HTTP_200
, 9) != 9)
1229 rbuf
+= 8; /* skip "Status: " */
1230 count
= out_cnt
- 8;
1231 out_cnt
= -1; /* buffering off */
1232 } else if (out_cnt
>= 4) {
1233 /* Did CGI add "HTTP"? */
1234 if (memcmp(rbuf
, HTTP_200
, 4) != 0) {
1235 /* there is no "HTTP", do it ourself */
1236 if (full_write(STDOUT_FILENO
, HTTP_200
, sizeof(HTTP_200
)-1) != sizeof(HTTP_200
)-1)
1240 if (!strstr(rbuf, "ontent-")) {
1241 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1243 * Counter-example of valid CGI without Content-type:
1244 * echo -en "HTTP/1.0 302 Found\r\n"
1245 * echo -en "Location: http://www.busybox.net\r\n"
1249 out_cnt
= -1; /* buffering off */
1252 count
= safe_read(fromCgi_rd
, rbuf
, PIPE_BUF
);
1254 break; /* eof (or error) */
1256 if (full_write(STDOUT_FILENO
, rbuf
, count
) != count
)
1259 fprintf(stderr
, "cgi read %d bytes: '%.*s'\n", count
, count
, rbuf
);
1260 } /* if (pfd[FROM_CGI].revents) */
1266 #if ENABLE_FEATURE_HTTPD_CGI
1268 static void setenv1(const char *name
, const char *value
)
1270 setenv(name
, value
? value
: "", 1);
1274 * Spawn CGI script, forward CGI's stdin/out <=> network
1276 * Environment variables are set up and the script is invoked with pipes
1277 * for stdin/stdout. If a POST is being done the script is fed the POST
1278 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1281 * const char *url The requested URL (with leading /).
1282 * const char *orig_uri The original URI before rewriting (if any)
1283 * int post_len Length of the POST body.
1284 * const char *cookie For set HTTP_COOKIE.
1285 * const char *content_type For set CONTENT_TYPE.
1287 static void send_cgi_and_exit(
1289 const char *orig_uri
,
1290 const char *request
,
1293 const char *content_type
) NORETURN
;
1294 static void send_cgi_and_exit(
1296 const char *orig_uri
,
1297 const char *request
,
1300 const char *content_type
)
1302 struct fd_pair fromCgi
; /* CGI -> httpd pipe */
1303 struct fd_pair toCgi
; /* httpd -> CGI pipe */
1304 char *script
, *last_slash
;
1307 /* Make a copy. NB: caller guarantees:
1308 * url[0] == '/', url[1] != '/' */
1312 * We are mucking with environment _first_ and then vfork/exec,
1313 * this allows us to use vfork safely. Parent doesn't care about
1314 * these environment changes anyway.
1317 /* Check for [dirs/]script.cgi/PATH_INFO */
1318 last_slash
= script
= (char*)url
;
1319 while ((script
= strchr(script
+ 1, '/')) != NULL
) {
1322 dir
= is_directory(url
+ 1, /*followlinks:*/ 1);
1325 /* not directory, found script.cgi/PATH_INFO */
1328 /* is directory, find next '/' */
1329 last_slash
= script
;
1331 setenv1("PATH_INFO", script
); /* set to /PATH_INFO or "" */
1332 setenv1("REQUEST_METHOD", request
);
1334 putenv(xasprintf("%s=%s?%s", "REQUEST_URI", orig_uri
, g_query
));
1336 setenv1("REQUEST_URI", orig_uri
);
1339 *script
= '\0'; /* cut off /PATH_INFO */
1341 /* SCRIPT_FILENAME is required by PHP in CGI mode */
1342 if (home_httpd
[0] == '/') {
1343 char *fullpath
= concat_path_file(home_httpd
, url
);
1344 setenv1("SCRIPT_FILENAME", fullpath
);
1346 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1347 setenv1("SCRIPT_NAME", url
);
1348 /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
1349 * QUERY_STRING: The information which follows the ? in the URL
1350 * which referenced this script. This is the query information.
1351 * It should not be decoded in any fashion. This variable
1352 * should always be set when there is query information,
1353 * regardless of command line decoding. */
1354 /* (Older versions of bbox seem to do some decoding) */
1355 setenv1("QUERY_STRING", g_query
);
1356 putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER
);
1357 putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
1358 putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
1359 /* Having _separate_ variables for IP and port defeats
1360 * the purpose of having socket abstraction. Which "port"
1361 * are you using on Unix domain socket?
1362 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
1365 char *p
= rmt_ip_str
? rmt_ip_str
: (char*)"";
1366 char *cp
= strrchr(p
, ':');
1367 if (ENABLE_FEATURE_IPV6
&& cp
&& strchr(cp
, ']'))
1369 if (cp
) *cp
= '\0'; /* delete :PORT */
1370 setenv1("REMOTE_ADDR", p
);
1373 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1374 setenv1("REMOTE_PORT", cp
+ 1);
1378 setenv1("HTTP_USER_AGENT", user_agent
);
1380 setenv1("HTTP_ACCEPT", http_accept
);
1381 if (http_accept_language
)
1382 setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language
);
1384 putenv(xasprintf("CONTENT_LENGTH=%d", post_len
));
1386 setenv1("HTTP_COOKIE", cookie
);
1388 setenv1("CONTENT_TYPE", content_type
);
1389 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1391 setenv1("REMOTE_USER", remoteuser
);
1392 putenv((char*)"AUTH_TYPE=Basic");
1396 setenv1("HTTP_REFERER", referer
);
1397 setenv1("HTTP_HOST", host
); /* set to "" if NULL */
1398 /* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
1399 * just run "env SERVER_NAME=xyz httpd ..." instead */
1401 xpiped_pair(fromCgi
);
1406 /* TODO: log perror? */
1414 xfunc_error_retval
= 242;
1416 /* NB: close _first_, then move fds! */
1419 xmove_fd(toCgi
.rd
, 0); /* replace stdin with the pipe */
1420 xmove_fd(fromCgi
.wr
, 1); /* replace stdout with the pipe */
1421 /* User seeing stderr output can be a security problem.
1422 * If CGI really wants that, it can always do dup itself. */
1425 /* Chdiring to script's dir */
1426 script
= last_slash
;
1427 if (script
!= url
) { /* paranoia */
1429 if (chdir(url
+ 1) != 0) {
1430 bb_perror_msg("can't change directory to '%s'", url
+ 1);
1431 goto error_execing_cgi
;
1433 // not needed: *script = '/';
1437 /* set argv[0] to name without path */
1441 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1443 char *suffix
= strrchr(script
, '.');
1447 for (cur
= script_i
; cur
; cur
= cur
->next
) {
1448 if (strcmp(cur
->before_colon
+ 1, suffix
) == 0) {
1449 /* found interpreter name */
1450 argv
[0] = cur
->after_colon
;
1459 /* restore default signal dispositions for CGI process */
1466 /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
1467 * without any dir components and will only match a file
1468 * in the current directory */
1469 execv(argv
[0], argv
);
1471 bb_perror_msg("can't execute '%s'", argv
[0]);
1474 * (we are CGI here, our stdout is pumped to the net) */
1475 send_headers_and_exit(HTTP_NOT_FOUND
);
1478 /* Parent process */
1480 /* Restore variables possibly changed by child */
1481 xfunc_error_retval
= 0;
1486 cgi_io_loop_and_exit(fromCgi
.rd
, toCgi
.wr
, post_len
);
1489 #endif /* FEATURE_HTTPD_CGI */
1492 * Send a file response to a HTTP request, and exit
1495 * const char *url The requested URL (with leading /).
1496 * what What to send (headers/body/both).
1498 static NOINLINE
void send_file_and_exit(const char *url
, int what
)
1505 /* does <url>.gz exist? Then use it instead */
1506 char *gzurl
= xasprintf("%s.gz", url
);
1507 fd
= open(gzurl
, O_RDONLY
);
1512 file_size
= sb
.st_size
;
1513 last_mod
= sb
.st_mtime
;
1515 IF_FEATURE_HTTPD_GZIP(content_gzip
= 0;)
1516 fd
= open(url
, O_RDONLY
);
1519 fd
= open(url
, O_RDONLY
);
1523 bb_perror_msg("can't open '%s'", url
);
1524 /* Error pages are sent by using send_file_and_exit(SEND_BODY).
1525 * IOW: it is unsafe to call send_headers_and_exit
1526 * if what is SEND_BODY! Can recurse! */
1527 if (what
!= SEND_BODY
)
1528 send_headers_and_exit(HTTP_NOT_FOUND
);
1531 /* If you want to know about EPIPE below
1532 * (happens if you abort downloads from local httpd): */
1533 signal(SIGPIPE
, SIG_IGN
);
1535 /* If not found, default is "application/octet-stream" */
1536 found_mime_type
= "application/octet-stream";
1537 suffix
= strrchr(url
, '.');
1539 static const char suffixTable
[] ALIGN1
=
1540 /* Shorter suffix must be first:
1541 * ".html.htm" will fail for ".htm"
1543 ".txt.h.c.cc.cpp\0" "text/plain\0"
1544 /* .htm line must be after .h line */
1545 ".htm.html\0" "text/html\0"
1546 ".jpg.jpeg\0" "image/jpeg\0"
1547 ".gif\0" "image/gif\0"
1548 ".png\0" "image/png\0"
1549 /* .css line must be after .c line */
1550 ".css\0" "text/css\0"
1551 ".wav\0" "audio/wav\0"
1552 ".avi\0" "video/x-msvideo\0"
1553 ".qt.mov\0" "video/quicktime\0"
1554 ".mpe.mpeg\0" "video/mpeg\0"
1555 ".mid.midi\0" "audio/midi\0"
1556 ".mp3\0" "audio/mpeg\0"
1557 #if 0 /* unpopular */
1558 ".au\0" "audio/basic\0"
1559 ".pac\0" "application/x-ns-proxy-autoconfig\0"
1560 ".vrml.wrl\0" "model/vrml\0"
1562 /* compiler adds another "\0" here */
1566 /* Examine built-in table */
1567 const char *table
= suffixTable
;
1568 const char *table_next
;
1569 for (; *table
; table
= table_next
) {
1570 const char *try_suffix
;
1571 const char *mime_type
;
1572 mime_type
= table
+ strlen(table
) + 1;
1573 table_next
= mime_type
+ strlen(mime_type
) + 1;
1574 try_suffix
= strstr(table
, suffix
);
1577 try_suffix
+= strlen(suffix
);
1578 if (*try_suffix
== '\0' || *try_suffix
== '.') {
1579 found_mime_type
= mime_type
;
1582 /* Example: strstr(table, ".av") != NULL, but it
1583 * does not match ".avi" after all and we end up here.
1584 * The table is arranged so that in this case we know
1585 * that it can't match anything in the following lines,
1586 * and we stop the search: */
1589 /* ...then user's table */
1590 for (cur
= mime_a
; cur
; cur
= cur
->next
) {
1591 if (strcmp(cur
->before_colon
, suffix
) == 0) {
1592 found_mime_type
= cur
->after_colon
;
1599 bb_error_msg("sending file '%s' content-type: %s",
1600 url
, found_mime_type
);
1602 #if ENABLE_FEATURE_HTTPD_RANGES
1603 if (what
== SEND_BODY
/* err pages and ranges don't mix */
1604 || content_gzip
/* we are sending compressed page: can't do ranges */ ///why?
1608 range_len
= MAXINT(off_t
);
1609 if (range_start
>= 0) {
1610 if (!range_end
|| range_end
> file_size
- 1) {
1611 range_end
= file_size
- 1;
1613 if (range_end
< range_start
1614 || lseek(fd
, range_start
, SEEK_SET
) != range_start
1616 lseek(fd
, 0, SEEK_SET
);
1619 range_len
= range_end
- range_start
+ 1;
1620 send_headers(HTTP_PARTIAL_CONTENT
);
1625 if (what
& SEND_HEADERS
)
1626 send_headers(HTTP_OK
);
1627 #if ENABLE_FEATURE_USE_SENDFILE
1629 off_t offset
= range_start
;
1631 /* sz is rounded down to 64k */
1632 ssize_t sz
= MAXINT(ssize_t
) - 0xffff;
1633 IF_FEATURE_HTTPD_RANGES(if (sz
> range_len
) sz
= range_len
;)
1634 count
= sendfile(STDOUT_FILENO
, fd
, &offset
, sz
);
1636 if (offset
== range_start
)
1637 break; /* fall back to read/write loop */
1640 IF_FEATURE_HTTPD_RANGES(range_len
-= count
;)
1641 if (count
== 0 || range_len
== 0)
1646 while ((count
= safe_read(fd
, iobuf
, IOBUF_SIZE
)) > 0) {
1648 IF_FEATURE_HTTPD_RANGES(if (count
> range_len
) count
= range_len
;)
1649 n
= full_write(STDOUT_FILENO
, iobuf
, count
);
1652 IF_FEATURE_HTTPD_RANGES(range_len
-= count
;)
1657 IF_FEATURE_USE_SENDFILE(fin
:)
1659 bb_perror_msg("error");
1664 static int checkPermIP(void)
1668 for (cur
= ip_a_d
; cur
; cur
= cur
->next
) {
1671 "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
1673 (unsigned char)(cur
->ip
>> 24),
1674 (unsigned char)(cur
->ip
>> 16),
1675 (unsigned char)(cur
->ip
>> 8),
1676 (unsigned char)(cur
->ip
),
1677 (unsigned char)(cur
->mask
>> 24),
1678 (unsigned char)(cur
->mask
>> 16),
1679 (unsigned char)(cur
->mask
>> 8),
1680 (unsigned char)(cur
->mask
)
1683 if ((rmt_ip
& cur
->mask
) == cur
->ip
)
1684 return (cur
->allow_deny
== 'A'); /* A -> 1 */
1687 return !flg_deny_all
; /* depends on whether we saw "D:*" */
1690 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1693 struct pam_userinfo
{
1698 static int pam_talker(int num_msg
,
1699 const struct pam_message
**msg
,
1700 struct pam_response
**resp
,
1704 struct pam_userinfo
*userinfo
= (struct pam_userinfo
*) appdata_ptr
;
1705 struct pam_response
*response
;
1707 if (!resp
|| !msg
|| !userinfo
)
1708 return PAM_CONV_ERR
;
1710 /* allocate memory to store response */
1711 response
= xzalloc(num_msg
* sizeof(*response
));
1714 for (i
= 0; i
< num_msg
; i
++) {
1717 switch (msg
[i
]->msg_style
) {
1718 case PAM_PROMPT_ECHO_ON
:
1721 case PAM_PROMPT_ECHO_OFF
:
1730 return PAM_CONV_ERR
;
1732 response
[i
].resp
= xstrdup(s
);
1733 if (PAM_SUCCESS
!= 0)
1734 response
[i
].resp_retcode
= PAM_SUCCESS
;
1742 * Config file entries are of the form "/<path>:<user>:<passwd>".
1743 * If config file has no prefix match for path, access is allowed.
1745 * path The file path
1746 * user_and_passwd "user:passwd" to validate
1748 * Returns 1 if user_and_passwd is OK.
1750 static int check_user_passwd(const char *path
, char *user_and_passwd
)
1753 const char *prev
= NULL
;
1755 for (cur
= g_auth
; cur
; cur
= cur
->next
) {
1756 const char *dir_prefix
;
1760 dir_prefix
= cur
->before_colon
;
1763 /* If already saw a match, don't accept other different matches */
1764 if (prev
&& strcmp(prev
, dir_prefix
) != 0)
1768 fprintf(stderr
, "checkPerm: '%s' ? '%s'\n", dir_prefix
, user_and_passwd
);
1770 /* If it's not a prefix match, continue searching */
1771 len
= strlen(dir_prefix
);
1772 if (len
!= 1 /* dir_prefix "/" matches all, don't need to check */
1773 && (strncmp(dir_prefix
, path
, len
) != 0
1774 || (path
[len
] != '/' && path
[len
] != '\0')
1780 /* Path match found */
1783 if (ENABLE_FEATURE_HTTPD_AUTH_MD5
) {
1784 char *colon_after_user
;
1786 # if ENABLE_FEATURE_SHADOWPASSWDS && !ENABLE_PAM
1790 colon_after_user
= strchr(user_and_passwd
, ':');
1791 if (!colon_after_user
)
1794 /* compare "user:" */
1795 if (cur
->after_colon
[0] != '*'
1796 && strncmp(cur
->after_colon
, user_and_passwd
,
1797 colon_after_user
- user_and_passwd
+ 1) != 0
1801 /* this cfg entry is '*' or matches username from peer */
1803 passwd
= strchr(cur
->after_colon
, ':');
1807 if (passwd
[0] == '*') {
1809 struct pam_userinfo userinfo
;
1810 struct pam_conv conv_info
= { &pam_talker
, (void *) &userinfo
};
1813 *colon_after_user
= '\0';
1814 userinfo
.name
= user_and_passwd
;
1815 userinfo
.pw
= colon_after_user
+ 1;
1816 r
= pam_start("httpd", user_and_passwd
, &conv_info
, &pamh
) != PAM_SUCCESS
;
1818 r
= pam_authenticate(pamh
, PAM_DISALLOW_NULL_AUTHTOK
) != PAM_SUCCESS
1819 || pam_acct_mgmt(pamh
, PAM_DISALLOW_NULL_AUTHTOK
) != PAM_SUCCESS
1821 pam_end(pamh
, PAM_SUCCESS
);
1823 *colon_after_user
= ':';
1824 goto end_check_passwd
;
1826 # if ENABLE_FEATURE_SHADOWPASSWDS
1827 /* Using _r function to avoid pulling in static buffers */
1832 *colon_after_user
= '\0';
1833 pw
= getpwnam(user_and_passwd
);
1834 *colon_after_user
= ':';
1835 if (!pw
|| !pw
->pw_passwd
)
1837 passwd
= pw
->pw_passwd
;
1838 # if ENABLE_FEATURE_SHADOWPASSWDS
1839 if ((passwd
[0] == 'x' || passwd
[0] == '*') && !passwd
[1]) {
1840 /* getspnam_r may return 0 yet set result to NULL.
1841 * At least glibc 2.4 does this. Be extra paranoid here. */
1842 struct spwd
*result
= NULL
;
1843 r
= getspnam_r(pw
->pw_name
, &spw
, sp_buf
, sizeof(sp_buf
), &result
);
1844 if (r
== 0 && result
)
1845 passwd
= result
->sp_pwdp
;
1848 /* In this case, passwd is ALWAYS encrypted:
1849 * it came from /etc/passwd or /etc/shadow!
1851 goto check_encrypted
;
1852 # endif /* ENABLE_PAM */
1854 /* Else: passwd is from httpd.conf, it is either plaintext or encrypted */
1856 if (passwd
[0] == '$' && isdigit(passwd
[1])) {
1861 /* encrypt pwd from peer and check match with local one */
1862 encrypted
= pw_encrypt(
1863 /* pwd (from peer): */ colon_after_user
+ 1,
1867 r
= strcmp(encrypted
, passwd
);
1870 /* local passwd is from httpd.conf and it's plaintext */
1871 r
= strcmp(colon_after_user
+ 1, passwd
);
1873 goto end_check_passwd
;
1876 /* Comparing plaintext "user:pass" in one go */
1877 r
= strcmp(cur
->after_colon
, user_and_passwd
);
1880 remoteuser
= xstrndup(user_and_passwd
,
1881 strchrnul(user_and_passwd
, ':') - user_and_passwd
1887 /* 0(bad) if prev is set: matches were found but passwd was wrong */
1888 return (prev
== NULL
);
1890 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1892 #if ENABLE_FEATURE_HTTPD_PROXY
1893 static Htaccess_Proxy
*find_proxy_entry(const char *url
)
1896 for (p
= proxy
; p
; p
= p
->next
) {
1897 if (strncmp(url
, p
->url_from
, strlen(p
->url_from
)) == 0)
1907 static void send_REQUEST_TIMEOUT_and_exit(int sig
) NORETURN
;
1908 static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM
)
1910 send_headers_and_exit(HTTP_REQUEST_TIMEOUT
);
1914 * Handle an incoming http request and exit.
1916 static void handle_incoming_and_exit(const len_and_sockaddr
*fromAddr
) NORETURN
;
1917 static void handle_incoming_and_exit(const len_and_sockaddr
*fromAddr
)
1919 static const char request_GET
[] ALIGN1
= "GET";
1924 #if ENABLE_FEATURE_HTTPD_CGI
1925 static const char request_HEAD
[] ALIGN1
= "HEAD";
1926 const char *prequest
;
1927 char *cookie
= NULL
;
1928 char *content_type
= NULL
;
1929 unsigned long length
= 0;
1930 #elif ENABLE_FEATURE_HTTPD_PROXY
1931 #define prequest request_GET
1932 unsigned long length
= 0;
1934 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1935 smallint authorized
= -1;
1937 smallint ip_allowed
;
1938 char http_major_version
;
1939 #if ENABLE_FEATURE_HTTPD_PROXY
1940 char http_minor_version
;
1941 char *header_buf
= header_buf
; /* for gcc */
1942 char *header_ptr
= header_ptr
;
1943 Htaccess_Proxy
*proxy_entry
;
1946 /* Allocation of iobuf is postponed until now
1947 * (IOW, server process doesn't need to waste 8k) */
1948 iobuf
= xmalloc(IOBUF_SIZE
);
1951 if (fromAddr
->u
.sa
.sa_family
== AF_INET
) {
1952 rmt_ip
= ntohl(fromAddr
->u
.sin
.sin_addr
.s_addr
);
1954 #if ENABLE_FEATURE_IPV6
1955 if (fromAddr
->u
.sa
.sa_family
== AF_INET6
1956 && fromAddr
->u
.sin6
.sin6_addr
.s6_addr32
[0] == 0
1957 && fromAddr
->u
.sin6
.sin6_addr
.s6_addr32
[1] == 0
1958 && ntohl(fromAddr
->u
.sin6
.sin6_addr
.s6_addr32
[2]) == 0xffff)
1959 rmt_ip
= ntohl(fromAddr
->u
.sin6
.sin6_addr
.s6_addr32
[3]);
1961 if (ENABLE_FEATURE_HTTPD_CGI
|| DEBUG
|| verbose
) {
1962 /* NB: can be NULL (user runs httpd -i by hand?) */
1963 rmt_ip_str
= xmalloc_sockaddr2dotted(&fromAddr
->u
.sa
);
1966 /* this trick makes -v logging much simpler */
1968 applet_name
= rmt_ip_str
;
1970 bb_error_msg("connected");
1973 /* Install timeout handler. get_line() needs it. */
1974 signal(SIGALRM
, send_REQUEST_TIMEOUT_and_exit
);
1976 if (!get_line()) /* EOF or error or empty line */
1977 send_headers_and_exit(HTTP_BAD_REQUEST
);
1979 /* Determine type of request (GET/POST) */
1980 // rfc2616: method and URI is separated by exactly one space
1981 //urlp = strpbrk(iobuf, " \t"); - no, tab isn't allowed
1982 urlp
= strchr(iobuf
, ' ');
1984 send_headers_and_exit(HTTP_BAD_REQUEST
);
1986 #if ENABLE_FEATURE_HTTPD_CGI
1987 prequest
= request_GET
;
1988 if (strcasecmp(iobuf
, prequest
) != 0) {
1989 prequest
= request_HEAD
;
1990 if (strcasecmp(iobuf
, prequest
) != 0) {
1992 if (strcasecmp(iobuf
, prequest
) != 0)
1993 send_headers_and_exit(HTTP_NOT_IMPLEMENTED
);
1997 if (strcasecmp(iobuf
, request_GET
) != 0)
1998 send_headers_and_exit(HTTP_NOT_IMPLEMENTED
);
2000 // rfc2616: method and URI is separated by exactly one space
2001 //urlp = skip_whitespace(urlp); - should not be necessary
2003 send_headers_and_exit(HTTP_BAD_REQUEST
);
2005 /* Find end of URL and parse HTTP version, if any */
2006 http_major_version
= '0';
2007 IF_FEATURE_HTTPD_PROXY(http_minor_version
= '0';)
2008 tptr
= strchrnul(urlp
, ' ');
2009 /* Is it " HTTP/"? */
2010 if (tptr
[0] && strncmp(tptr
+ 1, HTTP_200
, 5) == 0) {
2011 http_major_version
= tptr
[6];
2012 IF_FEATURE_HTTPD_PROXY(http_minor_version
= tptr
[8];)
2016 /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
2017 urlcopy
= alloca((tptr
- urlp
) + 2 + strlen(index_page
));
2018 /*if (urlcopy == NULL)
2019 * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
2020 strcpy(urlcopy
, urlp
);
2021 /* NB: urlcopy ptr is never changed after this */
2023 /* Extract url args if present */
2024 /* g_query = NULL; - already is */
2025 tptr
= strchr(urlcopy
, '?');
2031 /* Decode URL escape sequences */
2032 tptr
= percent_decode_in_place(urlcopy
, /*strict:*/ 1);
2034 send_headers_and_exit(HTTP_BAD_REQUEST
);
2035 if (tptr
== urlcopy
+ 1) {
2036 /* '/' or NUL is encoded */
2037 send_headers_and_exit(HTTP_NOT_FOUND
);
2040 /* Canonicalize path */
2041 /* Algorithm stolen from libbb bb_simplify_path(),
2042 * but don't strdup, retain trailing slash, protect root */
2043 urlp
= tptr
= urlcopy
;
2046 /* skip duplicate (or initial) slash */
2051 if (tptr
[1] == '.' && (tptr
[2] == '/' || tptr
[2] == '\0')) {
2052 /* "..": be careful */
2054 if (urlp
== urlcopy
)
2055 send_headers_and_exit(HTTP_BAD_REQUEST
);
2056 /* omit previous dir */
2057 while (*--urlp
!= '/')
2059 /* skip to "./" or ".<NUL>" */
2062 if (tptr
[1] == '/' || tptr
[1] == '\0') {
2063 /* skip extra "/./" */
2075 /* If URL is a directory, add '/' */
2076 if (urlp
[-1] != '/') {
2077 if (is_directory(urlcopy
+ 1, /*followlinks:*/ 1)) {
2078 found_moved_temporarily
= urlcopy
;
2084 bb_error_msg("url:%s", urlcopy
);
2087 ip_allowed
= checkPermIP();
2088 while (ip_allowed
&& (tptr
= strchr(tptr
+ 1, '/')) != NULL
) {
2089 /* have path1/path2 */
2091 if (is_directory(urlcopy
+ 1, /*followlinks:*/ 1)) {
2092 /* may have subdir config */
2093 parse_conf(urlcopy
+ 1, SUBDIR_PARSE
);
2094 ip_allowed
= checkPermIP();
2099 #if ENABLE_FEATURE_HTTPD_PROXY
2100 proxy_entry
= find_proxy_entry(urlcopy
);
2102 header_buf
= header_ptr
= xmalloc(IOBUF_SIZE
);
2105 if (http_major_version
>= '0') {
2106 /* Request was with "... HTTP/nXXX", and n >= 0 */
2108 /* Read until blank line */
2111 break; /* EOF or error or empty line */
2113 bb_error_msg("header: '%s'", iobuf
);
2115 #if ENABLE_FEATURE_HTTPD_PROXY
2116 /* We need 2 more bytes for yet another "\r\n" -
2117 * see near fdprintf(proxy_fd...) further below */
2118 if (proxy_entry
&& (header_ptr
- header_buf
) < IOBUF_SIZE
- 2) {
2119 int len
= strlen(iobuf
);
2120 if (len
> IOBUF_SIZE
- (header_ptr
- header_buf
) - 4)
2121 len
= IOBUF_SIZE
- (header_ptr
- header_buf
) - 4;
2122 memcpy(header_ptr
, iobuf
, len
);
2124 header_ptr
[0] = '\r';
2125 header_ptr
[1] = '\n';
2130 #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
2131 /* Try and do our best to parse more lines */
2132 if ((STRNCASECMP(iobuf
, "Content-length:") == 0)) {
2133 /* extra read only for POST */
2134 if (prequest
!= request_GET
2135 # if ENABLE_FEATURE_HTTPD_CGI
2136 && prequest
!= request_HEAD
2139 tptr
= skip_whitespace(iobuf
+ sizeof("Content-length:") - 1);
2141 send_headers_and_exit(HTTP_BAD_REQUEST
);
2142 /* not using strtoul: it ignores leading minus! */
2143 length
= bb_strtou(tptr
, NULL
, 10);
2144 /* length is "ulong", but we need to pass it to int later */
2145 if (errno
|| length
> INT_MAX
)
2146 send_headers_and_exit(HTTP_BAD_REQUEST
);
2150 #if ENABLE_FEATURE_HTTPD_CGI
2151 else if (STRNCASECMP(iobuf
, "Cookie:") == 0) {
2152 cookie
= xstrdup(skip_whitespace(iobuf
+ sizeof("Cookie:")-1));
2153 } else if (STRNCASECMP(iobuf
, "Content-Type:") == 0) {
2154 content_type
= xstrdup(skip_whitespace(iobuf
+ sizeof("Content-Type:")-1));
2155 } else if (STRNCASECMP(iobuf
, "Referer:") == 0) {
2156 referer
= xstrdup(skip_whitespace(iobuf
+ sizeof("Referer:")-1));
2157 } else if (STRNCASECMP(iobuf
, "User-Agent:") == 0) {
2158 user_agent
= xstrdup(skip_whitespace(iobuf
+ sizeof("User-Agent:")-1));
2159 } else if (STRNCASECMP(iobuf
, "Host:") == 0) {
2160 host
= xstrdup(skip_whitespace(iobuf
+ sizeof("Host:")-1));
2161 } else if (STRNCASECMP(iobuf
, "Accept:") == 0) {
2162 http_accept
= xstrdup(skip_whitespace(iobuf
+ sizeof("Accept:")-1));
2163 } else if (STRNCASECMP(iobuf
, "Accept-Language:") == 0) {
2164 http_accept_language
= xstrdup(skip_whitespace(iobuf
+ sizeof("Accept-Language:")-1));
2167 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
2168 if (STRNCASECMP(iobuf
, "Authorization:") == 0) {
2169 /* We only allow Basic credentials.
2170 * It shows up as "Authorization: Basic <user>:<passwd>" where
2171 * "<user>:<passwd>" is base64 encoded.
2173 tptr
= skip_whitespace(iobuf
+ sizeof("Authorization:")-1);
2174 if (STRNCASECMP(tptr
, "Basic") != 0)
2176 tptr
+= sizeof("Basic")-1;
2177 /* decodeBase64() skips whitespace itself */
2179 authorized
= check_user_passwd(urlcopy
, tptr
);
2182 #if ENABLE_FEATURE_HTTPD_RANGES
2183 if (STRNCASECMP(iobuf
, "Range:") == 0) {
2184 /* We know only bytes=NNN-[MMM] */
2185 char *s
= skip_whitespace(iobuf
+ sizeof("Range:")-1);
2186 if (strncmp(s
, "bytes=", 6) == 0) {
2187 s
+= sizeof("bytes=")-1;
2188 range_start
= BB_STRTOOFF(s
, &s
, 10);
2189 if (s
[0] != '-' || range_start
< 0) {
2192 range_end
= BB_STRTOOFF(s
+1, NULL
, 10);
2193 if (errno
|| range_end
< range_start
)
2199 #if ENABLE_FEATURE_HTTPD_GZIP
2200 if (STRNCASECMP(iobuf
, "Accept-Encoding:") == 0) {
2201 /* Note: we do not support "gzip;q=0"
2202 * method of _disabling_ gzip
2203 * delivery. No one uses that, though */
2204 const char *s
= strstr(iobuf
, "gzip");
2206 // want more thorough checks?
2216 } /* while extra header reading */
2219 /* We are done reading headers, disable peer timeout */
2222 if (strcmp(bb_basename(urlcopy
), HTTPD_CONF
) == 0 || !ip_allowed
) {
2223 /* protect listing [/path]/httpd.conf or IP deny */
2224 send_headers_and_exit(HTTP_FORBIDDEN
);
2227 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
2228 /* Case: no "Authorization:" was seen, but page might require passwd.
2229 * Check that with dummy user:pass */
2231 authorized
= check_user_passwd(urlcopy
, (char *) "");
2233 send_headers_and_exit(HTTP_UNAUTHORIZED
);
2236 if (found_moved_temporarily
) {
2237 send_headers_and_exit(HTTP_MOVED_TEMPORARILY
);
2240 #if ENABLE_FEATURE_HTTPD_PROXY
2241 if (proxy_entry
!= NULL
) {
2243 len_and_sockaddr
*lsa
;
2245 proxy_fd
= socket(AF_INET
, SOCK_STREAM
, 0);
2247 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR
);
2248 lsa
= host2sockaddr(proxy_entry
->host_port
, 80);
2250 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR
);
2251 if (connect(proxy_fd
, &lsa
->u
.sa
, lsa
->len
) < 0)
2252 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR
);
2253 fdprintf(proxy_fd
, "%s %s%s%s%s HTTP/%c.%c\r\n",
2254 prequest
, /* GET or POST */
2255 proxy_entry
->url_to
, /* url part 1 */
2256 urlcopy
+ strlen(proxy_entry
->url_from
), /* url part 2 */
2257 (g_query
? "?" : ""), /* "?" (maybe) */
2258 (g_query
? g_query
: ""), /* query string (maybe) */
2259 http_major_version
, http_minor_version
);
2260 header_ptr
[0] = '\r';
2261 header_ptr
[1] = '\n';
2263 write(proxy_fd
, header_buf
, header_ptr
- header_buf
);
2264 free(header_buf
); /* on the order of 8k, free it */
2265 cgi_io_loop_and_exit(proxy_fd
, proxy_fd
, length
);
2269 tptr
= urlcopy
+ 1; /* skip first '/' */
2271 #if ENABLE_FEATURE_HTTPD_CGI
2272 if (strncmp(tptr
, "cgi-bin/", 8) == 0) {
2273 if (tptr
[8] == '\0') {
2274 /* protect listing "cgi-bin/" */
2275 send_headers_and_exit(HTTP_FORBIDDEN
);
2277 send_cgi_and_exit(urlcopy
, urlcopy
, prequest
, length
, cookie
, content_type
);
2281 if (urlp
[-1] == '/') {
2282 /* When index_page string is appended to <dir>/ URL, it overwrites
2283 * the query string. If we fall back to call /cgi-bin/index.cgi,
2284 * query string would be lost and not available to the CGI.
2285 * Work around it by making a deep copy.
2287 if (ENABLE_FEATURE_HTTPD_CGI
)
2288 g_query
= xstrdup(g_query
); /* ok for NULL too */
2289 strcpy(urlp
, index_page
);
2291 if (stat(tptr
, &sb
) == 0) {
2292 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
2293 char *suffix
= strrchr(tptr
, '.');
2296 for (cur
= script_i
; cur
; cur
= cur
->next
) {
2297 if (strcmp(cur
->before_colon
+ 1, suffix
) == 0) {
2298 send_cgi_and_exit(urlcopy
, urlcopy
, prequest
, length
, cookie
, content_type
);
2303 file_size
= sb
.st_size
;
2304 last_mod
= sb
.st_mtime
;
2306 #if ENABLE_FEATURE_HTTPD_CGI
2307 else if (urlp
[-1] == '/') {
2308 /* It's a dir URL and there is no index.html
2309 * Try cgi-bin/index.cgi */
2310 if (access("/cgi-bin/index.cgi"+1, X_OK
) == 0) {
2311 urlp
[0] = '\0'; /* remove index_page */
2312 send_cgi_and_exit("/cgi-bin/index.cgi", urlcopy
, prequest
, length
, cookie
, content_type
);
2315 /* else fall through to send_file, it errors out if open fails: */
2317 if (prequest
!= request_GET
&& prequest
!= request_HEAD
) {
2318 /* POST for files does not make sense */
2319 send_headers_and_exit(HTTP_NOT_IMPLEMENTED
);
2321 send_file_and_exit(tptr
,
2322 (prequest
!= request_HEAD
? SEND_HEADERS_AND_BODY
: SEND_HEADERS
)
2325 send_file_and_exit(tptr
, SEND_HEADERS_AND_BODY
);
2330 * The main http server function.
2331 * Given a socket, listen for new connections and farm out
2332 * the processing as a [v]forked process.
2336 static void mini_httpd(int server_socket
) NORETURN
;
2337 static void mini_httpd(int server_socket
)
2339 /* NB: it's best to not use xfuncs in this loop before fork().
2340 * Otherwise server may die on transient errors (temporary
2341 * out-of-memory condition, etc), which is Bad(tm).
2342 * Try to do any dangerous calls after fork.
2346 len_and_sockaddr fromAddr
;
2348 /* Wait for connections... */
2349 fromAddr
.len
= LSA_SIZEOF_SA
;
2350 n
= accept(server_socket
, &fromAddr
.u
.sa
, &fromAddr
.len
);
2354 /* set the KEEPALIVE option to cull dead connections */
2355 setsockopt(n
, SOL_SOCKET
, SO_KEEPALIVE
, &const_int_1
, sizeof(const_int_1
));
2359 /* Do not reload config on HUP */
2360 signal(SIGHUP
, SIG_IGN
);
2361 close(server_socket
);
2365 handle_incoming_and_exit(&fromAddr
);
2367 /* parent, or fork failed */
2373 static void mini_httpd_nommu(int server_socket
, int argc
, char **argv
) NORETURN
;
2374 static void mini_httpd_nommu(int server_socket
, int argc
, char **argv
)
2376 char *argv_copy
[argc
+ 2];
2378 argv_copy
[0] = argv
[0];
2379 argv_copy
[1] = (char*)"-i";
2380 memcpy(&argv_copy
[2], &argv
[1], argc
* sizeof(argv
[0]));
2382 /* NB: it's best to not use xfuncs in this loop before vfork().
2383 * Otherwise server may die on transient errors (temporary
2384 * out-of-memory condition, etc), which is Bad(tm).
2385 * Try to do any dangerous calls after fork.
2389 len_and_sockaddr fromAddr
;
2391 /* Wait for connections... */
2392 fromAddr
.len
= LSA_SIZEOF_SA
;
2393 n
= accept(server_socket
, &fromAddr
.u
.sa
, &fromAddr
.len
);
2397 /* set the KEEPALIVE option to cull dead connections */
2398 setsockopt(n
, SOL_SOCKET
, SO_KEEPALIVE
, &const_int_1
, sizeof(const_int_1
));
2402 /* Do not reload config on HUP */
2403 signal(SIGHUP
, SIG_IGN
);
2404 close(server_socket
);
2408 /* Run a copy of ourself in inetd mode */
2411 argv_copy
[0][0] &= 0x7f;
2412 /* parent, or vfork failed */
2420 * Process a HTTP connection on stdin/out.
2423 static void mini_httpd_inetd(void) NORETURN
;
2424 static void mini_httpd_inetd(void)
2426 len_and_sockaddr fromAddr
;
2428 memset(&fromAddr
, 0, sizeof(fromAddr
));
2429 fromAddr
.len
= LSA_SIZEOF_SA
;
2430 /* NB: can fail if user runs it by hand and types in http cmds */
2431 getpeername(0, &fromAddr
.u
.sa
, &fromAddr
.len
);
2432 handle_incoming_and_exit(&fromAddr
);
2435 static void sighup_handler(int sig UNUSED_PARAM
)
2437 parse_conf(DEFAULT_PATH_HTTPD_CONF
, SIGNALED_PARSE
);
2441 c_opt_config_file
= 0,
2444 IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url
,)
2445 IF_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm
,)
2446 IF_FEATURE_HTTPD_AUTH_MD5( m_opt_md5
,)
2447 IF_FEATURE_HTTPD_SETUID( u_opt_setuid
,)
2452 OPT_CONFIG_FILE
= 1 << c_opt_config_file
,
2453 OPT_DECODE_URL
= 1 << d_opt_decode_url
,
2454 OPT_HOME_HTTPD
= 1 << h_opt_home_httpd
,
2455 OPT_ENCODE_URL
= IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url
)) + 0,
2456 OPT_REALM
= IF_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm
)) + 0,
2457 OPT_MD5
= IF_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5
)) + 0,
2458 OPT_SETUID
= IF_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid
)) + 0,
2459 OPT_PORT
= 1 << p_opt_port
,
2460 OPT_INETD
= 1 << p_opt_inetd
,
2461 OPT_FOREGROUND
= 1 << p_opt_foreground
,
2462 OPT_VERBOSE
= 1 << p_opt_verbose
,
2466 int httpd_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
2467 int httpd_main(int argc UNUSED_PARAM
, char **argv
)
2469 int server_socket
= server_socket
; /* for gcc */
2471 char *url_for_decode
;
2472 IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode
;)
2473 IF_FEATURE_HTTPD_SETUID(const char *s_ugid
= NULL
;)
2474 IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid
;)
2475 IF_FEATURE_HTTPD_AUTH_MD5(const char *pass
;)
2479 #if ENABLE_LOCALE_SUPPORT
2480 /* Undo busybox.c: we want to speak English in http (dates etc) */
2481 setlocale(LC_TIME
, "C");
2484 home_httpd
= xrealloc_getcwd_or_warn(NULL
);
2485 /* -v counts, -i implies -f */
2486 opt_complementary
= "vv:if";
2487 /* We do not "absolutize" path given by -h (home) opt.
2488 * If user gives relative path in -h,
2489 * $SCRIPT_FILENAME will not be set. */
2490 opt
= getopt32(argv
, "c:d:h:"
2491 IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
2492 IF_FEATURE_HTTPD_BASIC_AUTH("r:")
2493 IF_FEATURE_HTTPD_AUTH_MD5("m:")
2494 IF_FEATURE_HTTPD_SETUID("u:")
2496 &opt_c_configFile
, &url_for_decode
, &home_httpd
2497 IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode
)
2498 IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm
)
2499 IF_FEATURE_HTTPD_AUTH_MD5(, &pass
)
2500 IF_FEATURE_HTTPD_SETUID(, &s_ugid
)
2501 , &bind_addr_or_port
2504 if (opt
& OPT_DECODE_URL
) {
2505 fputs(percent_decode_in_place(url_for_decode
, /*strict:*/ 0), stdout
);
2508 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
2509 if (opt
& OPT_ENCODE_URL
) {
2510 fputs(encodeString(url_for_encode
), stdout
);
2514 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
2515 if (opt
& OPT_MD5
) {
2516 char salt
[sizeof("$1$XXXXXXXX")];
2520 crypt_make_salt(salt
+ 3, 4);
2521 puts(pw_encrypt(pass
, salt
, /*cleanup:*/ 0));
2525 #if ENABLE_FEATURE_HTTPD_SETUID
2526 if (opt
& OPT_SETUID
) {
2527 xget_uidgid(&ugid
, s_ugid
);
2532 if (!(opt
& OPT_FOREGROUND
)) {
2533 bb_daemonize_or_rexec(0, argv
); /* don't change current directory */
2538 if (!(opt
& OPT_INETD
)) {
2539 signal(SIGCHLD
, SIG_IGN
);
2540 server_socket
= openServer();
2541 #if ENABLE_FEATURE_HTTPD_SETUID
2542 /* drop privileges */
2543 if (opt
& OPT_SETUID
) {
2544 if (ugid
.gid
!= (gid_t
)-1) {
2545 if (setgroups(1, &ugid
.gid
) == -1)
2546 bb_perror_msg_and_die("setgroups");
2555 /* User can do it himself: 'env - PATH="$PATH" httpd'
2556 * We don't do it because we don't want to screw users
2558 * 'env - VAR1=val1 VAR2=val2 httpd'
2559 * and have VAR1 and VAR2 values visible in their CGIs.
2560 * Besides, it is also smaller. */
2562 char *p
= getenv("PATH");
2563 /* env strings themself are not freed, no need to xstrdup(p): */
2567 // if (!(opt & OPT_INETD))
2568 // setenv_long("SERVER_PORT", ???);
2572 parse_conf(DEFAULT_PATH_HTTPD_CONF
, FIRST_PARSE
);
2573 if (!(opt
& OPT_INETD
))
2574 signal(SIGHUP
, sighup_handler
);
2576 xfunc_error_retval
= 0;
2577 if (opt
& OPT_INETD
)
2580 if (!(opt
& OPT_FOREGROUND
))
2581 bb_daemonize(0); /* don't change current directory */
2582 mini_httpd(server_socket
); /* never returns */
2584 mini_httpd_nommu(server_socket
, argc
, argv
); /* never returns */