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.
25 * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
27 * The applet can also be invoked as an url arg decoder and html text encoder
29 * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
30 * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
31 * Note that url encoding for arguments is not the same as html encoding for
32 * presentation. -d decodes an url-encoded argument while -e encodes in html
35 * httpd.conf has the following format:
37 * H:/serverroot # define the server root. It will override -h
38 * A:172.20. # Allow address from 172.20.0.0/16
39 * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
40 * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
41 * A:127.0.0.1 # Allow local loopback connections
42 * D:* # Deny from other IP connections
43 * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
44 * I:index.html # Show index.html when a directory is requested
46 * P:/url:[http://]hostname[:port]/new/path
47 * # When /urlXXXXXX is requested, reverse proxy
48 * # it to http://hostname[:port]/new/pathXXXXXX
50 * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
51 * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
52 * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
53 * .au:audio/basic # additional mime type for audio.au files
54 * *.php:/path/php # run xxx.php through an interpreter
56 * A/D may be as a/d or allow/deny - only first char matters.
57 * Deny/Allow IP logic:
58 * - Default is to allow all (Allow all (A:*) is a no-op).
59 * - Deny rules take precedence over allow rules.
60 * - "Deny all" rule (D:*) is applied last.
63 * 1. Allow only specified addresses
64 * A:172.20 # Allow any address that begins with 172.20.
65 * A:10.10. # Allow any address that begins with 10.10.
66 * A:127.0.0.1 # Allow local loopback connections
67 * D:* # Deny from other IP connections
69 * 2. Only deny specified addresses
70 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
71 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
72 * A:* # (optional line added for clarity)
74 * If a sub directory contains a config file it is parsed and merged with
75 * any existing settings as if it was appended to the original configuration.
77 * subdir paths are relative to the containing subdir and thus cannot
78 * affect the parent rules.
80 * Note that since the sub dir is parsed in the forked thread servicing the
81 * subdir http request, any merge is discarded when the process exits. As a
82 * result, the subdir settings only have a lifetime of a single request.
84 * Custom error pages can contain an absolute path or be relative to
85 * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
86 * page can only be defined in the root configuration file and are not taken
87 * into account in local (directories) config files.
89 * If -c is not set, an attempt will be made to open the default
90 * root configuration file. If -c is set and the file is not found, the
91 * server exits with an error.
94 /* TODO: use TCP_CORK, parse_config() */
97 #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
98 # include <sys/sendfile.h>
100 /* amount of buffering in a pipe */
102 # define PIPE_BUF 4096
107 #define IOBUF_SIZE 8192
108 #if PIPE_BUF >= IOBUF_SIZE
109 # error "PIPE_BUF >= IOBUF_SIZE"
112 #define HEADER_READ_TIMEOUT 60
114 static const char DEFAULT_PATH_HTTPD_CONF[] ALIGN1 = "/etc";
115 static const char HTTPD_CONF[] ALIGN1 = "httpd.conf";
116 static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
117 static const char index_html[] ALIGN1 = "index.html";
119 typedef struct has_next_ptr {
120 struct has_next_ptr *next;
123 /* Must have "next" as a first member */
124 typedef struct Htaccess {
125 struct Htaccess *next;
127 char before_colon[1]; /* really bigger, must be last */
130 /* Must have "next" as a first member */
131 typedef struct Htaccess_IP {
132 struct Htaccess_IP *next;
138 /* Must have "next" as a first member */
139 typedef struct Htaccess_Proxy {
140 struct Htaccess_Proxy *next;
148 HTTP_PARTIAL_CONTENT = 206,
149 HTTP_MOVED_TEMPORARILY = 302,
150 HTTP_BAD_REQUEST = 400, /* malformed syntax */
151 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
152 HTTP_NOT_FOUND = 404,
153 HTTP_FORBIDDEN = 403,
154 HTTP_REQUEST_TIMEOUT = 408,
155 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
156 HTTP_INTERNAL_SERVER_ERROR = 500,
158 #if 0 /* future use */
159 HTTP_SWITCHING_PROTOCOLS = 101,
162 HTTP_NON_AUTHORITATIVE_INFO = 203,
163 HTTP_NO_CONTENT = 204,
164 HTTP_MULTIPLE_CHOICES = 300,
165 HTTP_MOVED_PERMANENTLY = 301,
166 HTTP_NOT_MODIFIED = 304,
167 HTTP_PAYMENT_REQUIRED = 402,
168 HTTP_BAD_GATEWAY = 502,
169 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
173 static const uint16_t http_response_type[] ALIGN2 = {
175 #if ENABLE_FEATURE_HTTPD_RANGES
176 HTTP_PARTIAL_CONTENT,
178 HTTP_MOVED_TEMPORARILY,
179 HTTP_REQUEST_TIMEOUT,
180 HTTP_NOT_IMPLEMENTED,
181 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
187 HTTP_INTERNAL_SERVER_ERROR,
188 #if 0 /* not implemented */
192 HTTP_MULTIPLE_CHOICES,
193 HTTP_MOVED_PERMANENTLY,
196 HTTP_SERVICE_UNAVAILABLE,
200 static const struct {
203 } http_response[ARRAY_SIZE(http_response_type)] = {
205 #if ENABLE_FEATURE_HTTPD_RANGES
206 { "Partial Content", NULL },
209 { "Request Timeout", "No request appeared within 60 seconds" },
210 { "Not Implemented", "The requested method is not recognized" },
211 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
212 { "Unauthorized", "" },
214 { "Not Found", "The requested URL was not found" },
215 { "Bad Request", "Unsupported method" },
217 { "Internal Server Error", "Internal Server Error" },
218 #if 0 /* not implemented */
222 { "Multiple Choices" },
223 { "Moved Permanently" },
225 { "Bad Gateway", "" },
226 { "Service Unavailable", "" },
231 int verbose; /* must be int (used by getopt32) */
232 smallint flg_deny_all;
234 unsigned rmt_ip; /* used for IP-based allow/deny rules */
236 char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
237 const char *bind_addr_or_port;
240 const char *opt_c_configFile;
241 const char *home_httpd;
242 const char *index_page;
244 const char *found_mime_type;
245 const char *found_moved_temporarily;
246 Htaccess_IP *ip_a_d; /* config allow/deny lines */
248 IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
249 IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
250 IF_FEATURE_HTTPD_CGI(char *referer;)
251 IF_FEATURE_HTTPD_CGI(char *user_agent;)
252 IF_FEATURE_HTTPD_CGI(char *host;)
253 IF_FEATURE_HTTPD_CGI(char *http_accept;)
254 IF_FEATURE_HTTPD_CGI(char *http_accept_language;)
256 off_t file_size; /* -1 - unknown */
257 #if ENABLE_FEATURE_HTTPD_RANGES
263 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
264 Htaccess *g_auth; /* config user:password lines */
266 Htaccess *mime_a; /* config mime types */
267 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
268 Htaccess *script_i; /* config script interpreters */
270 char *iobuf; /* [IOBUF_SIZE] */
271 #define hdr_buf bb_common_bufsiz1
274 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
275 const char *http_error_page[ARRAY_SIZE(http_response_type)];
277 #if ENABLE_FEATURE_HTTPD_PROXY
278 Htaccess_Proxy *proxy;
280 #if ENABLE_FEATURE_HTTPD_GZIP
281 /* client can handle gzip / we are going to send gzip */
282 smallint content_gzip;
285 #define G (*ptr_to_globals)
286 #define verbose (G.verbose )
287 #define flg_deny_all (G.flg_deny_all )
288 #define rmt_ip (G.rmt_ip )
289 #define bind_addr_or_port (G.bind_addr_or_port)
290 #define g_query (G.g_query )
291 #define opt_c_configFile (G.opt_c_configFile )
292 #define home_httpd (G.home_httpd )
293 #define index_page (G.index_page )
294 #define found_mime_type (G.found_mime_type )
295 #define found_moved_temporarily (G.found_moved_temporarily)
296 #define last_mod (G.last_mod )
297 #define ip_a_d (G.ip_a_d )
298 #define g_realm (G.g_realm )
299 #define remoteuser (G.remoteuser )
300 #define referer (G.referer )
301 #define user_agent (G.user_agent )
302 #define host (G.host )
303 #define http_accept (G.http_accept )
304 #define http_accept_language (G.http_accept_language)
305 #define file_size (G.file_size )
306 #if ENABLE_FEATURE_HTTPD_RANGES
307 #define range_start (G.range_start )
308 #define range_end (G.range_end )
309 #define range_len (G.range_len )
313 range_end = MAXINT(off_t) - 1,
314 range_len = MAXINT(off_t),
317 #define rmt_ip_str (G.rmt_ip_str )
318 #define g_auth (G.g_auth )
319 #define mime_a (G.mime_a )
320 #define script_i (G.script_i )
321 #define iobuf (G.iobuf )
322 #define hdr_ptr (G.hdr_ptr )
323 #define hdr_cnt (G.hdr_cnt )
324 #define http_error_page (G.http_error_page )
325 #define proxy (G.proxy )
326 #if ENABLE_FEATURE_HTTPD_GZIP
327 # define content_gzip (G.content_gzip )
329 # define content_gzip 0
331 #define INIT_G() do { \
332 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
333 IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
334 bind_addr_or_port = "80"; \
335 index_page = index_html; \
340 #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
344 SEND_HEADERS = (1 << 0),
345 SEND_BODY = (1 << 1),
346 SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
348 static void send_file_and_exit(const char *url, int what) NORETURN;
350 static void free_llist(has_next_ptr **pptr)
352 has_next_ptr *cur = *pptr;
354 has_next_ptr *t = cur;
361 static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
363 free_llist((has_next_ptr**)pptr);
366 static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
368 free_llist((has_next_ptr**)pptr);
371 /* Returns presumed mask width in bits or < 0 on error.
372 * Updates strp, stores IP at provided pointer */
373 static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
375 const char *p = *strp;
383 for (j = 0; j < 4; j++) {
386 if ((*p < '0' || *p > '9') && *p != '/' && *p)
389 while (*p >= '0' && *p <= '9') {
400 ip = (ip << 8) | octet;
414 /* Returns 0 on success. Stores IP and mask at provided pointers */
415 static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
421 i = scan_ip(&str, ipp, '/');
426 /* there is /xxx after dotted-IP address */
427 i = bb_strtou(str, &p, 10);
429 /* 'xxx' itself is dotted-IP mask, parse it */
430 /* (return 0 (success) only if it has N.N.N.N form) */
431 return scan_ip(&str, maskp, '\0') - 32;
440 if (sizeof(unsigned) == 4 && i == 32) {
441 /* mask >>= 32 below may not work */
447 /* i == 0 -> *maskp = 0x00000000
448 * i == 1 -> *maskp = 0x80000000
449 * i == 4 -> *maskp = 0xf0000000
450 * i == 31 -> *maskp = 0xfffffffe
451 * i == 32 -> *maskp = 0xffffffff */
452 *maskp = (uint32_t)(~mask);
457 * Parse configuration file into in-memory linked list.
459 * Any previous IP rules are discarded.
460 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
461 * are also discarded. That is, previous settings are retained if flag is
463 * Error pages are only parsed on the main config file.
465 * path Path where to look for httpd.conf (without filename).
466 * flag Type of the parse request.
470 FIRST_PARSE = 0, /* path will be "/etc" */
471 SIGNALED_PARSE = 1, /* path will be "/etc" */
472 SUBDIR_PARSE = 2, /* path will be derived from URL */
474 static void parse_conf(const char *path, int flag)
476 /* internally used extra flag state */
477 enum { TRY_CURDIR_PARSE = 3 };
480 const char *filename;
483 /* discard old rules */
484 free_Htaccess_IP_list(&ip_a_d);
486 /* retain previous auth and mime config only for subdir parse */
487 if (flag != SUBDIR_PARSE) {
488 free_Htaccess_list(&mime_a);
489 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
490 free_Htaccess_list(&g_auth);
492 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
493 free_Htaccess_list(&script_i);
497 filename = opt_c_configFile;
498 if (flag == SUBDIR_PARSE || filename == NULL) {
499 filename = alloca(strlen(path) + sizeof(HTTPD_CONF) + 2);
500 sprintf((char *)filename, "%s/%s", path, HTTPD_CONF);
503 while ((f = fopen_for_read(filename)) == NULL) {
504 if (flag >= SUBDIR_PARSE) { /* SUBDIR or TRY_CURDIR */
505 /* config file not found, no changes to config */
508 if (flag == FIRST_PARSE) {
509 /* -c CONFFILE given, but CONFFILE doesn't exist? */
510 if (opt_c_configFile)
511 bb_simple_perror_msg_and_die(opt_c_configFile);
512 /* else: no -c, thus we looked at /etc/httpd.conf,
513 * and it's not there. try ./httpd.conf: */
515 flag = TRY_CURDIR_PARSE;
516 filename = HTTPD_CONF;
519 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
520 /* in "/file:user:pass" lines, we prepend path in subdirs */
521 if (flag != SUBDIR_PARSE)
526 * I:default_index_file
528 * [AD]:IP[/mask] # allow/deny, * for wildcard
529 * Ennn:error.html # error page for status nnn
530 * P:/url:[http://]hostname[:port]/new/path # reverse proxy
531 * .ext:mime/type # mime type
532 * *.php:/path/php # run xxx.php through an interpreter
533 * /file:user:pass # username and password
535 while (fgets(buf, sizeof(buf), f) != NULL) {
540 { /* remove all whitespace, and # comments */
544 /* skip non-whitespace beginning. Often the whole line
545 * is non-whitespace. We want this case to work fast,
546 * without needless copying, therefore we don't merge
547 * this operation into next while loop. */
548 while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
549 && ch != ' ' && ch != '\t'
554 /* if we enter this loop, we have some whitespace.
556 while (ch != '\0' && ch != '\n' && ch != '#') {
557 if (ch != ' ' && ch != '\t') {
563 strlen_buf = p - buf;
565 continue; /* empty line */
568 after_colon = strchr(buf, ':');
570 if (after_colon == NULL || *++after_colon == '\0')
573 ch = (buf[0] & ~0x20); /* toupper if it's a letter */
576 if (index_page != index_html)
577 free((char*)index_page);
578 index_page = xstrdup(after_colon);
582 /* do not allow jumping around using H in subdir's configs */
583 if (flag == FIRST_PARSE && ch == 'H') {
584 home_httpd = xstrdup(after_colon);
589 if (ch == 'A' || ch == 'D') {
592 if (*after_colon == '*') {
594 /* memorize "deny all" */
597 /* skip assumed "A:*", it is a default anyway */
600 /* store "allow/deny IP/mask" line */
601 pip = xzalloc(sizeof(*pip));
602 if (scan_ip_mask(after_colon, &pip->ip, &pip->mask)) {
603 /* IP{/mask} syntax error detected, protect all */
607 pip->allow_deny = ch;
609 /* Deny:from_IP - prepend */
613 /* A:from_IP - append (thus all D's precedes A's) */
614 Htaccess_IP *prev_IP = ip_a_d;
615 if (prev_IP == NULL) {
618 while (prev_IP->next)
619 prev_IP = prev_IP->next;
626 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
627 if (flag == FIRST_PARSE && ch == 'E') {
629 int status = atoi(buf + 1); /* error status code */
631 if (status < HTTP_CONTINUE) {
634 /* then error page; find matching status */
635 for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
636 if (http_response_type[i] == status) {
637 /* We chdir to home_httpd, thus no need to
638 * concat_path_file(home_httpd, after_colon)
640 http_error_page[i] = xstrdup(after_colon);
648 #if ENABLE_FEATURE_HTTPD_PROXY
649 if (flag == FIRST_PARSE && ch == 'P') {
650 /* P:/url:[http://]hostname[:port]/new/path */
651 char *url_from, *host_port, *url_to;
652 Htaccess_Proxy *proxy_entry;
654 url_from = after_colon;
655 host_port = strchr(after_colon, ':');
656 if (host_port == NULL) {
660 if (strncmp(host_port, "http://", 7) == 0)
662 if (*host_port == '\0') {
665 url_to = strchr(host_port, '/');
666 if (url_to == NULL) {
670 proxy_entry = xzalloc(sizeof(*proxy_entry));
671 proxy_entry->url_from = xstrdup(url_from);
672 proxy_entry->host_port = xstrdup(host_port);
674 proxy_entry->url_to = xstrdup(url_to);
675 proxy_entry->next = proxy;
680 /* the rest of directives are non-alphabetic,
681 * must avoid using "toupper'ed" ch */
684 if (ch == '.' /* ".ext:mime/type" */
685 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
686 || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
692 cur = xzalloc(sizeof(*cur) /* includes space for NUL */ + strlen_buf);
693 strcpy(cur->before_colon, buf);
694 p = cur->before_colon + (after_colon - buf);
696 cur->after_colon = p;
698 /* .mime line: prepend to mime_a list */
702 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
704 /* script interpreter line: prepend to script_i list */
705 cur->next = script_i;
712 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
713 if (ch == '/') { /* "/file:user:pass" */
718 /* note: path is "" unless we are in SUBDIR parse,
719 * otherwise it does NOT start with "/" */
720 cur = xzalloc(sizeof(*cur) /* includes space for NUL */
724 /* form "/path/file" */
725 sprintf(cur->before_colon, "/%s%.*s",
727 (int) (after_colon - buf - 1), /* includes "/", but not ":" */
729 /* canonicalize it */
730 p = bb_simplify_abs_path_inplace(cur->before_colon);
731 file_len = p - cur->before_colon;
732 /* add "user:pass" after NUL */
733 strcpy(++p, after_colon);
734 cur->after_colon = p;
736 /* insert cur into g_auth */
737 /* g_auth is sorted by decreased filename length */
739 Htaccess *auth, **authp;
742 while ((auth = *authp) != NULL) {
743 if (file_len >= strlen(auth->before_colon)) {
744 /* insert cur before auth */
754 #endif /* BASIC_AUTH */
756 /* the line is not recognized */
758 bb_error_msg("config error '%s' in '%s'", buf, filename);
759 } /* while (fgets) */
764 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
766 * Given a string, html-encode special characters.
767 * This is used for the -e command line option to provide an easy way
768 * for scripts to encode result data without confusing browsers. The
769 * returned string pointer is memory allocated by malloc().
771 * Returns a pointer to the encoded string (malloced).
773 static char *encodeString(const char *string)
775 /* take the simple route and encode everything */
776 /* could possibly scan once to get length. */
777 int len = strlen(string);
778 char *out = xmalloc(len * 6 + 1);
782 while ((ch = *string++) != '\0') {
783 /* very simple check for what to encode */
787 p += sprintf(p, "&#%d;", (unsigned char) ch);
795 * Given a URL encoded string, convert it to plain ascii.
796 * Since decoding always makes strings smaller, the decode is done in-place.
797 * Thus, callers should xstrdup() the argument if they do not want the
798 * argument modified. The return is the original pointer, allowing this
799 * function to be easily used as arguments to other functions.
801 * string The first string to decode.
802 * option_d 1 if called for httpd -d
804 * Returns a pointer to the decoded string (same as input).
806 static unsigned hex_to_bin(unsigned char c)
813 /* c | 0x20: letters to lower case, non-letters
814 * to (potentially different) non-letters */
815 v = (unsigned)(c | 0x20) - 'a';
820 void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
821 int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
822 t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
825 static char *decodeString(char *orig, int option_d)
827 /* note that decoded string is always shorter than original */
832 while ((c = *ptr++) != '\0') {
835 if (option_d && c == '+') {
843 v = hex_to_bin(ptr[0]);
851 v = (v * 16) | hex_to_bin(ptr[1]);
854 if (!option_d && (v == '/' || v == '\0')) {
855 /* caller takes it as indication of invalid
856 * (dangerous wrt exploits) chars */
866 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
868 * Decode a base64 data stream as per rfc1521.
869 * Note that the rfc states that non base64 chars are to be ignored.
870 * Since the decode always results in a shorter size than the input,
871 * it is OK to pass the input arg as an output arg.
872 * Parameter: a pointer to a base64 encoded string.
873 * Decoded data is stored in-place.
875 static void decodeBase64(char *Data)
877 const unsigned char *in = (const unsigned char *)Data;
878 /* The decoded size will be at most 3/4 the size of the encoded */
885 if (t >= '0' && t <= '9')
887 else if (t >= 'A' && t <= 'Z')
889 else if (t >= 'a' && t <= 'z')
903 *Data++ = (char) (ch >> 16);
904 *Data++ = (char) (ch >> 8);
914 * Create a listen server socket on the designated port.
916 static int openServer(void)
918 unsigned n = bb_strtou(bind_addr_or_port, NULL, 10);
919 if (!errno && n && n <= 0xffff)
920 n = create_and_bind_stream_or_die(NULL, n);
922 n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
928 * Log the connection closure and exit.
930 static void log_and_exit(void) NORETURN;
931 static void log_and_exit(void)
933 /* Paranoia. IE said to be buggy. It may send some extra data
934 * or be confused by us just exiting without SHUT_WR. Oh well. */
935 shutdown(1, SHUT_WR);
937 (this also messes up stdin when user runs httpd -i from terminal)
939 while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
944 bb_error_msg("closed");
945 _exit(xfunc_error_retval);
949 * Create and send HTTP response headers.
950 * The arguments are combined and sent as one write operation. Note that
951 * IE will puke big-time if the headers are not sent in one packet and the
952 * second packet is delayed for any reason.
953 * responseNum - the result code to send.
955 static void send_headers(int responseNum)
957 static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
959 const char *responseString = "";
960 const char *infoString = NULL;
961 const char *mime_type;
962 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
963 const char *error_page = NULL;
966 time_t timer = time(NULL);
970 for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
971 if (http_response_type[i] == responseNum) {
972 responseString = http_response[i].name;
973 infoString = http_response[i].info;
974 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
975 error_page = http_error_page[i];
980 /* error message is HTML */
981 mime_type = responseNum == HTTP_OK ?
982 found_mime_type : "text/html";
985 bb_error_msg("response:%u", responseNum);
987 /* emit the current date */
988 strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
990 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
991 "Date: %s\r\nConnection: close\r\n",
992 responseNum, responseString, mime_type, tmp_str);
994 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
995 if (responseNum == HTTP_UNAUTHORIZED) {
996 len += sprintf(iobuf + len,
997 "WWW-Authenticate: Basic realm=\"%s\"\r\n",
1001 if (responseNum == HTTP_MOVED_TEMPORARILY) {
1002 len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
1003 found_moved_temporarily,
1004 (g_query ? "?" : ""),
1005 (g_query ? g_query : ""));
1008 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
1009 if (error_page && access(error_page, R_OK) == 0) {
1010 strcat(iobuf, "\r\n");
1014 fprintf(stderr, "headers: '%s'\n", iobuf);
1015 full_write(STDOUT_FILENO, iobuf, len);
1017 fprintf(stderr, "writing error page: '%s'\n", error_page);
1018 return send_file_and_exit(error_page, SEND_BODY);
1022 if (file_size != -1) { /* file */
1023 strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
1024 #if ENABLE_FEATURE_HTTPD_RANGES
1025 if (responseNum == HTTP_PARTIAL_CONTENT) {
1026 len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
1030 file_size = range_end - range_start + 1;
1033 len += sprintf(iobuf + len,
1034 #if ENABLE_FEATURE_HTTPD_RANGES
1035 "Accept-Ranges: bytes\r\n"
1037 "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
1039 content_gzip ? "Transfer-length:" : "Content-length:",
1045 len += sprintf(iobuf + len, "Content-Encoding: gzip\r\n");
1047 iobuf[len++] = '\r';
1048 iobuf[len++] = '\n';
1050 len += sprintf(iobuf + len,
1051 "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
1052 "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
1053 responseNum, responseString,
1054 responseNum, responseString, infoString);
1057 fprintf(stderr, "headers: '%s'\n", iobuf);
1058 if (full_write(STDOUT_FILENO, iobuf, len) != len) {
1060 bb_perror_msg("error");
1065 static void send_headers_and_exit(int responseNum) NORETURN;
1066 static void send_headers_and_exit(int responseNum)
1068 IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
1069 send_headers(responseNum);
1074 * Read from the socket until '\n' or EOF. '\r' chars are removed.
1075 * '\n' is replaced with NUL.
1076 * Return number of characters read or 0 if nothing is read
1077 * ('\r' and '\n' are not counted).
1078 * Data is returned in iobuf.
1080 static int get_line(void)
1085 alarm(HEADER_READ_TIMEOUT);
1088 hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
1093 iobuf[count] = c = *hdr_ptr++;
1099 iobuf[count] = '\0';
1102 if (count < (IOBUF_SIZE - 1)) /* check overflow */
1108 #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
1110 /* gcc 4.2.1 fares better with NOINLINE */
1111 static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) NORETURN;
1112 static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
1114 enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
1115 struct pollfd pfd[3];
1116 int out_cnt; /* we buffer a bit of initial CGI output */
1119 /* iobuf is used for CGI -> network data,
1120 * hdr_buf is for network -> CGI data (POSTDATA) */
1122 /* If CGI dies, we still want to correctly finish reading its output
1123 * and send it to the peer. So please no SIGPIPEs! */
1124 signal(SIGPIPE, SIG_IGN);
1126 // We inconsistently handle a case when more POSTDATA from network
1127 // is coming than we expected. We may give *some part* of that
1128 // extra data to CGI.
1130 //if (hdr_cnt > post_len) {
1131 // /* We got more POSTDATA from network than we expected */
1132 // hdr_cnt = post_len;
1134 post_len -= hdr_cnt;
1135 /* post_len - number of POST bytes not yet read from network */
1137 /* NB: breaking out of this loop jumps to log_and_exit() */
1140 memset(pfd, 0, sizeof(pfd));
1142 pfd[FROM_CGI].fd = fromCgi_rd;
1143 pfd[FROM_CGI].events = POLLIN;
1146 pfd[TO_CGI].fd = toCgi_wr;
1148 pfd[TO_CGI].events = POLLOUT;
1149 } else if (post_len > 0) {
1150 pfd[0].events = POLLIN;
1152 /* post_len <= 0 && hdr_cnt <= 0:
1153 * no more POST data to CGI,
1154 * let CGI see EOF on CGI's stdin */
1155 if (toCgi_wr != fromCgi_rd)
1161 /* Now wait on the set of sockets */
1162 count = safe_poll(pfd, toCgi_wr ? TO_CGI+1 : FROM_CGI+1, -1);
1165 if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
1166 /* Weird. CGI didn't exit and no fd's
1167 * are ready, yet poll returned?! */
1170 if (DEBUG && WIFEXITED(status))
1171 bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
1172 if (DEBUG && WIFSIGNALED(status))
1173 bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
1178 if (pfd[TO_CGI].revents) {
1179 /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
1180 /* Have data from peer and can write to CGI */
1181 count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
1182 /* Doesn't happen, we dont use nonblocking IO here
1183 *if (count < 0 && errno == EAGAIN) {
1190 /* EOF/broken pipe to CGI, stop piping POST data */
1191 hdr_cnt = post_len = 0;
1195 if (pfd[0].revents) {
1196 /* post_len > 0 && hdr_cnt == 0 here */
1197 /* We expect data, prev data portion is eaten by CGI
1198 * and there *is* data to read from the peer
1200 //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
1201 //count = safe_read(STDIN_FILENO, hdr_buf, count);
1202 count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
1208 /* no more POST data can be read */
1213 if (pfd[FROM_CGI].revents) {
1214 /* There is something to read from CGI */
1217 /* Are we still buffering CGI output? */
1219 /* HTTP_200[] has single "\r\n" at the end.
1220 * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
1221 * CGI scripts MUST send their own header terminated by
1222 * empty line, then data. That's why we have only one
1223 * <cr><lf> pair here. We will output "200 OK" line
1224 * if needed, but CGI still has to provide blank line
1225 * between header and body */
1227 /* Must use safe_read, not full_read, because
1228 * CGI may output a few first bytes and then wait
1229 * for POSTDATA without closing stdout.
1230 * With full_read we may wait here forever. */
1231 count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
1233 /* eof (or error) and there was no "HTTP",
1234 * so write it, then write received data */
1236 full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
1237 full_write(STDOUT_FILENO, rbuf, out_cnt);
1239 break; /* CGI stdout is closed, exiting */
1243 /* "Status" header format is: "Status: 302 Redirected\r\n" */
1244 if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
1245 /* send "HTTP/1.0 " */
1246 if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
1248 rbuf += 8; /* skip "Status: " */
1249 count = out_cnt - 8;
1250 out_cnt = -1; /* buffering off */
1251 } else if (out_cnt >= 4) {
1252 /* Did CGI add "HTTP"? */
1253 if (memcmp(rbuf, HTTP_200, 4) != 0) {
1254 /* there is no "HTTP", do it ourself */
1255 if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
1259 if (!strstr(rbuf, "ontent-")) {
1260 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1262 * Counter-example of valid CGI without Content-type:
1263 * echo -en "HTTP/1.0 302 Found\r\n"
1264 * echo -en "Location: http://www.busybox.net\r\n"
1268 out_cnt = -1; /* buffering off */
1271 count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
1273 break; /* eof (or error) */
1275 if (full_write(STDOUT_FILENO, rbuf, count) != count)
1278 fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
1279 } /* if (pfd[FROM_CGI].revents) */
1285 #if ENABLE_FEATURE_HTTPD_CGI
1287 static void setenv1(const char *name, const char *value)
1289 setenv(name, value ? value : "", 1);
1293 * Spawn CGI script, forward CGI's stdin/out <=> network
1295 * Environment variables are set up and the script is invoked with pipes
1296 * for stdin/stdout. If a POST is being done the script is fed the POST
1297 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1300 * const char *url The requested URL (with leading /).
1301 * int post_len Length of the POST body.
1302 * const char *cookie For set HTTP_COOKIE.
1303 * const char *content_type For set CONTENT_TYPE.
1305 static void send_cgi_and_exit(
1307 const char *request,
1310 const char *content_type) NORETURN;
1311 static void send_cgi_and_exit(
1313 const char *request,
1316 const char *content_type)
1318 struct fd_pair fromCgi; /* CGI -> httpd pipe */
1319 struct fd_pair toCgi; /* httpd -> CGI pipe */
1323 /* Make a copy. NB: caller guarantees:
1324 * url[0] == '/', url[1] != '/' */
1328 * We are mucking with environment _first_ and then vfork/exec,
1329 * this allows us to use vfork safely. Parent doesn't care about
1330 * these environment changes anyway.
1333 /* Check for [dirs/]script.cgi/PATH_INFO */
1334 script = (char*)url;
1335 while ((script = strchr(script + 1, '/')) != NULL) {
1337 if (!is_directory(url + 1, 1, NULL)) {
1338 /* not directory, found script.cgi/PATH_INFO */
1342 *script = '/'; /* is directory, find next '/' */
1344 setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
1345 setenv1("REQUEST_METHOD", request);
1347 putenv(xasprintf("%s=%s?%s", "REQUEST_URI", url, g_query));
1349 setenv1("REQUEST_URI", url);
1352 *script = '\0'; /* cut off /PATH_INFO */
1354 /* SCRIPT_FILENAME is required by PHP in CGI mode */
1355 if (home_httpd[0] == '/') {
1356 char *fullpath = concat_path_file(home_httpd, url);
1357 setenv1("SCRIPT_FILENAME", fullpath);
1359 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1360 setenv1("SCRIPT_NAME", url);
1361 /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
1362 * QUERY_STRING: The information which follows the ? in the URL
1363 * which referenced this script. This is the query information.
1364 * It should not be decoded in any fashion. This variable
1365 * should always be set when there is query information,
1366 * regardless of command line decoding. */
1367 /* (Older versions of bbox seem to do some decoding) */
1368 setenv1("QUERY_STRING", g_query);
1369 putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
1370 putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
1371 putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
1372 /* Having _separate_ variables for IP and port defeats
1373 * the purpose of having socket abstraction. Which "port"
1374 * are you using on Unix domain socket?
1375 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
1378 char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
1379 char *cp = strrchr(p, ':');
1380 if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
1382 if (cp) *cp = '\0'; /* delete :PORT */
1383 setenv1("REMOTE_ADDR", p);
1386 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1387 setenv1("REMOTE_PORT", cp + 1);
1391 setenv1("HTTP_USER_AGENT", user_agent);
1393 setenv1("HTTP_ACCEPT", http_accept);
1394 if (http_accept_language)
1395 setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language);
1397 putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
1399 setenv1("HTTP_COOKIE", cookie);
1401 setenv1("CONTENT_TYPE", content_type);
1402 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1404 setenv1("REMOTE_USER", remoteuser);
1405 putenv((char*)"AUTH_TYPE=Basic");
1409 setenv1("HTTP_REFERER", referer);
1410 setenv1("HTTP_HOST", host); /* set to "" if NULL */
1411 /* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
1412 * just run "env SERVER_NAME=xyz httpd ..." instead */
1414 xpiped_pair(fromCgi);
1419 /* TODO: log perror? */
1427 xfunc_error_retval = 242;
1429 /* NB: close _first_, then move fds! */
1432 xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
1433 xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
1434 /* User seeing stderr output can be a security problem.
1435 * If CGI really wants that, it can always do dup itself. */
1438 /* Chdiring to script's dir */
1439 script = strrchr(url, '/');
1440 if (script != url) { /* paranoia */
1442 if (chdir(url + 1) != 0) {
1443 bb_perror_msg("chdir(%s)", url + 1);
1444 goto error_execing_cgi;
1446 // not needed: *script = '/';
1450 /* set argv[0] to name without path */
1454 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1456 char *suffix = strrchr(script, '.');
1460 for (cur = script_i; cur; cur = cur->next) {
1461 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1462 /* found interpreter name */
1463 argv[0] = cur->after_colon;
1472 /* restore default signal dispositions for CGI process */
1479 /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
1480 * without any dir components and will only match a file
1481 * in the current directory */
1482 execv(argv[0], argv);
1484 bb_perror_msg("can't execute '%s'", argv[0]);
1487 * (we are CGI here, our stdout is pumped to the net) */
1488 send_headers_and_exit(HTTP_NOT_FOUND);
1491 /* Parent process */
1493 /* Restore variables possibly changed by child */
1494 xfunc_error_retval = 0;
1499 cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
1502 #endif /* FEATURE_HTTPD_CGI */
1505 * Send a file response to a HTTP request, and exit
1508 * const char *url The requested URL (with leading /).
1509 * what What to send (headers/body/both).
1511 static NOINLINE void send_file_and_exit(const char *url, int what)
1518 /* does <url>.gz exist? Then use it instead */
1519 char *gzurl = xasprintf("%s.gz", url);
1520 fd = open(gzurl, O_RDONLY);
1525 file_size = sb.st_size;
1526 last_mod = sb.st_mtime;
1528 IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
1529 fd = open(url, O_RDONLY);
1532 fd = open(url, O_RDONLY);
1536 bb_perror_msg("can't open '%s'", url);
1537 /* Error pages are sent by using send_file_and_exit(SEND_BODY).
1538 * IOW: it is unsafe to call send_headers_and_exit
1539 * if what is SEND_BODY! Can recurse! */
1540 if (what != SEND_BODY)
1541 send_headers_and_exit(HTTP_NOT_FOUND);
1544 /* If you want to know about EPIPE below
1545 * (happens if you abort downloads from local httpd): */
1546 signal(SIGPIPE, SIG_IGN);
1548 /* If not found, default is "application/octet-stream" */
1549 found_mime_type = "application/octet-stream";
1550 suffix = strrchr(url, '.');
1552 static const char suffixTable[] ALIGN1 =
1553 /* Shorter suffix must be first:
1554 * ".html.htm" will fail for ".htm"
1556 ".txt.h.c.cc.cpp\0" "text/plain\0"
1557 /* .htm line must be after .h line */
1558 ".htm.html\0" "text/html\0"
1559 ".jpg.jpeg\0" "image/jpeg\0"
1560 ".gif\0" "image/gif\0"
1561 ".png\0" "image/png\0"
1562 /* .css line must be after .c line */
1563 ".css\0" "text/css\0"
1564 ".wav\0" "audio/wav\0"
1565 ".avi\0" "video/x-msvideo\0"
1566 ".qt.mov\0" "video/quicktime\0"
1567 ".mpe.mpeg\0" "video/mpeg\0"
1568 ".mid.midi\0" "audio/midi\0"
1569 ".mp3\0" "audio/mpeg\0"
1570 #if 0 /* unpopular */
1571 ".au\0" "audio/basic\0"
1572 ".pac\0" "application/x-ns-proxy-autoconfig\0"
1573 ".vrml.wrl\0" "model/vrml\0"
1575 /* compiler adds another "\0" here */
1579 /* Examine built-in table */
1580 const char *table = suffixTable;
1581 const char *table_next;
1582 for (; *table; table = table_next) {
1583 const char *try_suffix;
1584 const char *mime_type;
1585 mime_type = table + strlen(table) + 1;
1586 table_next = mime_type + strlen(mime_type) + 1;
1587 try_suffix = strstr(table, suffix);
1590 try_suffix += strlen(suffix);
1591 if (*try_suffix == '\0' || *try_suffix == '.') {
1592 found_mime_type = mime_type;
1595 /* Example: strstr(table, ".av") != NULL, but it
1596 * does not match ".avi" after all and we end up here.
1597 * The table is arranged so that in this case we know
1598 * that it can't match anything in the following lines,
1599 * and we stop the search: */
1602 /* ...then user's table */
1603 for (cur = mime_a; cur; cur = cur->next) {
1604 if (strcmp(cur->before_colon, suffix) == 0) {
1605 found_mime_type = cur->after_colon;
1612 bb_error_msg("sending file '%s' content-type: %s",
1613 url, found_mime_type);
1615 #if ENABLE_FEATURE_HTTPD_RANGES
1616 if (what == SEND_BODY /* err pages and ranges don't mix */
1617 || content_gzip /* we are sending compressed page: can't do ranges */ ///why?
1621 range_len = MAXINT(off_t);
1624 range_end = file_size - 1;
1626 if (range_end < range_start
1627 || lseek(fd, range_start, SEEK_SET) != range_start
1629 lseek(fd, 0, SEEK_SET);
1632 range_len = range_end - range_start + 1;
1633 send_headers(HTTP_PARTIAL_CONTENT);
1638 if (what & SEND_HEADERS)
1639 send_headers(HTTP_OK);
1640 #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
1642 off_t offset = range_start;
1644 /* sz is rounded down to 64k */
1645 ssize_t sz = MAXINT(ssize_t) - 0xffff;
1646 IF_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
1647 count = sendfile(STDOUT_FILENO, fd, &offset, sz);
1649 if (offset == range_start)
1650 break; /* fall back to read/write loop */
1653 IF_FEATURE_HTTPD_RANGES(range_len -= sz;)
1654 if (count == 0 || range_len == 0)
1659 while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
1661 IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
1662 n = full_write(STDOUT_FILENO, iobuf, count);
1665 IF_FEATURE_HTTPD_RANGES(range_len -= count;)
1670 IF_FEATURE_HTTPD_USE_SENDFILE(fin:)
1672 bb_perror_msg("error");
1677 static int checkPermIP(void)
1681 for (cur = ip_a_d; cur; cur = cur->next) {
1684 "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
1686 (unsigned char)(cur->ip >> 24),
1687 (unsigned char)(cur->ip >> 16),
1688 (unsigned char)(cur->ip >> 8),
1689 (unsigned char)(cur->ip),
1690 (unsigned char)(cur->mask >> 24),
1691 (unsigned char)(cur->mask >> 16),
1692 (unsigned char)(cur->mask >> 8),
1693 (unsigned char)(cur->mask)
1696 if ((rmt_ip & cur->mask) == cur->ip)
1697 return (cur->allow_deny == 'A'); /* A -> 1 */
1700 return !flg_deny_all; /* depends on whether we saw "D:*" */
1703 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1705 * Config file entries are of the form "/<path>:<user>:<passwd>".
1706 * If config file has no prefix match for path, access is allowed.
1708 * path The file path
1709 * user_and_passwd "user:passwd" to validate
1711 * Returns 1 if user_and_passwd is OK.
1713 static int check_user_passwd(const char *path, const char *user_and_passwd)
1716 const char *prev = NULL;
1718 for (cur = g_auth; cur; cur = cur->next) {
1719 const char *dir_prefix;
1722 dir_prefix = cur->before_colon;
1725 /* If already saw a match, don't accept other different matches */
1726 if (prev && strcmp(prev, dir_prefix) != 0)
1730 fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);
1732 /* If it's not a prefix match, continue searching */
1733 len = strlen(dir_prefix);
1734 if (len != 1 /* dir_prefix "/" matches all, don't need to check */
1735 && (strncmp(dir_prefix, path, len) != 0
1736 || (path[len] != '/' && path[len] != '\0'))
1741 /* Path match found */
1744 if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
1747 md5_passwd = strchr(cur->after_colon, ':');
1748 if (md5_passwd && md5_passwd[1] == '$' && md5_passwd[2] == '1'
1749 && md5_passwd[3] == '$' && md5_passwd[4]
1755 user_len_p1 = md5_passwd - cur->after_colon;
1756 /* comparing "user:" */
1757 if (strncmp(cur->after_colon, user_and_passwd, user_len_p1) != 0) {
1761 encrypted = pw_encrypt(
1762 user_and_passwd + user_len_p1 /* cleartext pwd from user */,
1763 md5_passwd /*salt */, 1 /* cleanup */);
1764 r = strcmp(encrypted, md5_passwd);
1767 goto set_remoteuser_var; /* Ok */
1772 /* Comparing plaintext "user:pass" in one go */
1773 if (strcmp(cur->after_colon, user_and_passwd) == 0) {
1775 remoteuser = xstrndup(user_and_passwd,
1776 strchrnul(user_and_passwd, ':') - user_and_passwd);
1781 /* 0(bad) if prev is set: matches were found but passwd was wrong */
1782 return (prev == NULL);
1784 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1786 #if ENABLE_FEATURE_HTTPD_PROXY
1787 static Htaccess_Proxy *find_proxy_entry(const char *url)
1790 for (p = proxy; p; p = p->next) {
1791 if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
1801 static void send_REQUEST_TIMEOUT_and_exit(int sig) NORETURN;
1802 static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM)
1804 send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
1808 * Handle an incoming http request and exit.
1810 static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) NORETURN;
1811 static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
1813 static const char request_GET[] ALIGN1 = "GET";
1818 #if ENABLE_FEATURE_HTTPD_CGI
1819 static const char request_HEAD[] ALIGN1 = "HEAD";
1820 const char *prequest;
1821 char *cookie = NULL;
1822 char *content_type = NULL;
1823 unsigned long length = 0;
1824 #elif ENABLE_FEATURE_HTTPD_PROXY
1825 #define prequest request_GET
1826 unsigned long length = 0;
1828 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1829 smallint authorized = -1;
1831 smallint ip_allowed;
1832 char http_major_version;
1833 #if ENABLE_FEATURE_HTTPD_PROXY
1834 char http_minor_version;
1835 char *header_buf = header_buf; /* for gcc */
1836 char *header_ptr = header_ptr;
1837 Htaccess_Proxy *proxy_entry;
1840 /* Allocation of iobuf is postponed until now
1841 * (IOW, server process doesn't need to waste 8k) */
1842 iobuf = xmalloc(IOBUF_SIZE);
1845 if (fromAddr->u.sa.sa_family == AF_INET) {
1846 rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
1848 #if ENABLE_FEATURE_IPV6
1849 if (fromAddr->u.sa.sa_family == AF_INET6
1850 && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
1851 && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
1852 && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
1853 rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
1855 if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
1856 /* NB: can be NULL (user runs httpd -i by hand?) */
1857 rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
1860 /* this trick makes -v logging much simpler */
1862 applet_name = rmt_ip_str;
1864 bb_error_msg("connected");
1867 /* Install timeout handler. get_line() needs it. */
1868 signal(SIGALRM, send_REQUEST_TIMEOUT_and_exit);
1870 if (!get_line()) /* EOF or error or empty line */
1871 send_headers_and_exit(HTTP_BAD_REQUEST);
1873 /* Determine type of request (GET/POST) */
1874 urlp = strpbrk(iobuf, " \t");
1876 send_headers_and_exit(HTTP_BAD_REQUEST);
1878 #if ENABLE_FEATURE_HTTPD_CGI
1879 prequest = request_GET;
1880 if (strcasecmp(iobuf, prequest) != 0) {
1881 prequest = request_HEAD;
1882 if (strcasecmp(iobuf, prequest) != 0) {
1884 if (strcasecmp(iobuf, prequest) != 0)
1885 send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
1889 if (strcasecmp(iobuf, request_GET) != 0)
1890 send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
1892 urlp = skip_whitespace(urlp);
1894 send_headers_and_exit(HTTP_BAD_REQUEST);
1896 /* Find end of URL and parse HTTP version, if any */
1897 http_major_version = '0';
1898 IF_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
1899 tptr = strchrnul(urlp, ' ');
1900 /* Is it " HTTP/"? */
1901 if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
1902 http_major_version = tptr[6];
1903 IF_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
1907 /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
1908 urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
1909 /*if (urlcopy == NULL)
1910 * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
1911 strcpy(urlcopy, urlp);
1912 /* NB: urlcopy ptr is never changed after this */
1914 /* Extract url args if present */
1916 tptr = strchr(urlcopy, '?');
1922 /* Decode URL escape sequences */
1923 tptr = decodeString(urlcopy, 0);
1925 send_headers_and_exit(HTTP_BAD_REQUEST);
1926 if (tptr == urlcopy + 1) {
1927 /* '/' or NUL is encoded */
1928 send_headers_and_exit(HTTP_NOT_FOUND);
1931 /* Canonicalize path */
1932 /* Algorithm stolen from libbb bb_simplify_path(),
1933 * but don't strdup, retain trailing slash, protect root */
1934 urlp = tptr = urlcopy;
1937 /* skip duplicate (or initial) slash */
1942 /* skip extra "/./" */
1943 if (tptr[1] == '/' || !tptr[1]) {
1946 /* "..": be careful */
1947 if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
1949 if (urlp == urlcopy) /* protect root */
1950 send_headers_and_exit(HTTP_BAD_REQUEST);
1951 while (*--urlp != '/') /* omit previous dir */;
1958 *++urlp = '\0'; /* terminate after last character */
1960 /* If URL is a directory, add '/' */
1961 if (urlp[-1] != '/') {
1962 if (is_directory(urlcopy + 1, 1, NULL)) {
1963 found_moved_temporarily = urlcopy;
1969 bb_error_msg("url:%s", urlcopy);
1972 ip_allowed = checkPermIP();
1973 while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
1974 /* have path1/path2 */
1976 if (is_directory(urlcopy + 1, 1, NULL)) {
1977 /* may have subdir config */
1978 parse_conf(urlcopy + 1, SUBDIR_PARSE);
1979 ip_allowed = checkPermIP();
1984 #if ENABLE_FEATURE_HTTPD_PROXY
1985 proxy_entry = find_proxy_entry(urlcopy);
1987 header_buf = header_ptr = xmalloc(IOBUF_SIZE);
1990 if (http_major_version >= '0') {
1991 /* Request was with "... HTTP/nXXX", and n >= 0 */
1993 /* Read until blank line */
1996 break; /* EOF or error or empty line */
1998 bb_error_msg("header: '%s'", iobuf);
2000 #if ENABLE_FEATURE_HTTPD_PROXY
2001 /* We need 2 more bytes for yet another "\r\n" -
2002 * see near fdprintf(proxy_fd...) further below */
2003 if (proxy_entry && (header_ptr - header_buf) < IOBUF_SIZE - 2) {
2004 int len = strlen(iobuf);
2005 if (len > IOBUF_SIZE - (header_ptr - header_buf) - 4)
2006 len = IOBUF_SIZE - (header_ptr - header_buf) - 4;
2007 memcpy(header_ptr, iobuf, len);
2009 header_ptr[0] = '\r';
2010 header_ptr[1] = '\n';
2015 #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
2016 /* Try and do our best to parse more lines */
2017 if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
2018 /* extra read only for POST */
2019 if (prequest != request_GET
2020 # if ENABLE_FEATURE_HTTPD_CGI
2021 && prequest != request_HEAD
2024 tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
2026 send_headers_and_exit(HTTP_BAD_REQUEST);
2027 /* not using strtoul: it ignores leading minus! */
2028 length = bb_strtou(tptr, NULL, 10);
2029 /* length is "ulong", but we need to pass it to int later */
2030 if (errno || length > INT_MAX)
2031 send_headers_and_exit(HTTP_BAD_REQUEST);
2035 #if ENABLE_FEATURE_HTTPD_CGI
2036 else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
2037 cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
2038 } else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
2039 content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
2040 } else if (STRNCASECMP(iobuf, "Referer:") == 0) {
2041 referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
2042 } else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
2043 user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
2044 } else if (STRNCASECMP(iobuf, "Host:") == 0) {
2045 host = xstrdup(skip_whitespace(iobuf + sizeof("Host:")-1));
2046 } else if (STRNCASECMP(iobuf, "Accept:") == 0) {
2047 http_accept = xstrdup(skip_whitespace(iobuf + sizeof("Accept:")-1));
2048 } else if (STRNCASECMP(iobuf, "Accept-Language:") == 0) {
2049 http_accept_language = xstrdup(skip_whitespace(iobuf + sizeof("Accept-Language:")-1));
2052 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
2053 if (STRNCASECMP(iobuf, "Authorization:") == 0) {
2054 /* We only allow Basic credentials.
2055 * It shows up as "Authorization: Basic <user>:<passwd>" where
2056 * "<user>:<passwd>" is base64 encoded.
2058 tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
2059 if (STRNCASECMP(tptr, "Basic") != 0)
2061 tptr += sizeof("Basic")-1;
2062 /* decodeBase64() skips whitespace itself */
2064 authorized = check_user_passwd(urlcopy, tptr);
2067 #if ENABLE_FEATURE_HTTPD_RANGES
2068 if (STRNCASECMP(iobuf, "Range:") == 0) {
2069 /* We know only bytes=NNN-[MMM] */
2070 char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
2071 if (strncmp(s, "bytes=", 6) == 0) {
2072 s += sizeof("bytes=")-1;
2073 range_start = BB_STRTOOFF(s, &s, 10);
2074 if (s[0] != '-' || range_start < 0) {
2077 range_end = BB_STRTOOFF(s+1, NULL, 10);
2078 if (errno || range_end < range_start)
2084 #if ENABLE_FEATURE_HTTPD_GZIP
2085 if (STRNCASECMP(iobuf, "Accept-Encoding:") == 0) {
2086 /* Note: we do not support "gzip;q=0"
2087 * method of _disabling_ gzip
2088 * delivery. No one uses that, though */
2089 const char *s = strstr(iobuf, "gzip");
2091 // want more thorough checks?
2101 } /* while extra header reading */
2104 /* We are done reading headers, disable peer timeout */
2107 if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
2108 /* protect listing [/path]/httpd.conf or IP deny */
2109 send_headers_and_exit(HTTP_FORBIDDEN);
2112 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
2113 /* Case: no "Authorization:" was seen, but page does require passwd.
2114 * Check that with dummy user:pass */
2116 authorized = check_user_passwd(urlcopy, ":");
2118 send_headers_and_exit(HTTP_UNAUTHORIZED);
2121 if (found_moved_temporarily) {
2122 send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
2125 #if ENABLE_FEATURE_HTTPD_PROXY
2126 if (proxy_entry != NULL) {
2128 len_and_sockaddr *lsa;
2130 proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
2132 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
2133 lsa = host2sockaddr(proxy_entry->host_port, 80);
2135 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
2136 if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
2137 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
2138 fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
2139 prequest, /* GET or POST */
2140 proxy_entry->url_to, /* url part 1 */
2141 urlcopy + strlen(proxy_entry->url_from), /* url part 2 */
2142 (g_query ? "?" : ""), /* "?" (maybe) */
2143 (g_query ? g_query : ""), /* query string (maybe) */
2144 http_major_version, http_minor_version);
2145 header_ptr[0] = '\r';
2146 header_ptr[1] = '\n';
2148 write(proxy_fd, header_buf, header_ptr - header_buf);
2149 free(header_buf); /* on the order of 8k, free it */
2150 cgi_io_loop_and_exit(proxy_fd, proxy_fd, length);
2154 tptr = urlcopy + 1; /* skip first '/' */
2156 #if ENABLE_FEATURE_HTTPD_CGI
2157 if (strncmp(tptr, "cgi-bin/", 8) == 0) {
2158 if (tptr[8] == '\0') {
2159 /* protect listing "cgi-bin/" */
2160 send_headers_and_exit(HTTP_FORBIDDEN);
2162 send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
2166 if (urlp[-1] == '/')
2167 strcpy(urlp, index_page);
2168 if (stat(tptr, &sb) == 0) {
2169 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
2170 char *suffix = strrchr(tptr, '.');
2173 for (cur = script_i; cur; cur = cur->next) {
2174 if (strcmp(cur->before_colon + 1, suffix) == 0) {
2175 send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
2180 file_size = sb.st_size;
2181 last_mod = sb.st_mtime;
2183 #if ENABLE_FEATURE_HTTPD_CGI
2184 else if (urlp[-1] == '/') {
2185 /* It's a dir URL and there is no index.html
2186 * Try cgi-bin/index.cgi */
2187 if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
2190 send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
2193 /* else fall through to send_file, it errors out if open fails: */
2195 if (prequest != request_GET && prequest != request_HEAD) {
2196 /* POST for files does not make sense */
2197 send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
2199 send_file_and_exit(tptr,
2200 (prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
2203 send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
2208 * The main http server function.
2209 * Given a socket, listen for new connections and farm out
2210 * the processing as a [v]forked process.
2214 static void mini_httpd(int server_socket) NORETURN;
2215 static void mini_httpd(int server_socket)
2217 /* NB: it's best to not use xfuncs in this loop before fork().
2218 * Otherwise server may die on transient errors (temporary
2219 * out-of-memory condition, etc), which is Bad(tm).
2220 * Try to do any dangerous calls after fork.
2224 len_and_sockaddr fromAddr;
2226 /* Wait for connections... */
2227 fromAddr.len = LSA_SIZEOF_SA;
2228 n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
2232 /* set the KEEPALIVE option to cull dead connections */
2233 setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
2237 /* Do not reload config on HUP */
2238 signal(SIGHUP, SIG_IGN);
2239 close(server_socket);
2243 handle_incoming_and_exit(&fromAddr);
2245 /* parent, or fork failed */
2251 static void mini_httpd_nommu(int server_socket, int argc, char **argv) NORETURN;
2252 static void mini_httpd_nommu(int server_socket, int argc, char **argv)
2254 char *argv_copy[argc + 2];
2256 argv_copy[0] = argv[0];
2257 argv_copy[1] = (char*)"-i";
2258 memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
2260 /* NB: it's best to not use xfuncs in this loop before vfork().
2261 * Otherwise server may die on transient errors (temporary
2262 * out-of-memory condition, etc), which is Bad(tm).
2263 * Try to do any dangerous calls after fork.
2267 len_and_sockaddr fromAddr;
2269 /* Wait for connections... */
2270 fromAddr.len = LSA_SIZEOF_SA;
2271 n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
2275 /* set the KEEPALIVE option to cull dead connections */
2276 setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
2280 /* Do not reload config on HUP */
2281 signal(SIGHUP, SIG_IGN);
2282 close(server_socket);
2286 /* Run a copy of ourself in inetd mode */
2289 /* parent, or vfork failed */
2297 * Process a HTTP connection on stdin/out.
2300 static void mini_httpd_inetd(void) NORETURN;
2301 static void mini_httpd_inetd(void)
2303 len_and_sockaddr fromAddr;
2305 memset(&fromAddr, 0, sizeof(fromAddr));
2306 fromAddr.len = LSA_SIZEOF_SA;
2307 /* NB: can fail if user runs it by hand and types in http cmds */
2308 getpeername(0, &fromAddr.u.sa, &fromAddr.len);
2309 handle_incoming_and_exit(&fromAddr);
2312 static void sighup_handler(int sig UNUSED_PARAM)
2314 parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
2318 c_opt_config_file = 0,
2321 IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
2322 IF_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
2323 IF_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
2324 IF_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
2329 OPT_CONFIG_FILE = 1 << c_opt_config_file,
2330 OPT_DECODE_URL = 1 << d_opt_decode_url,
2331 OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
2332 OPT_ENCODE_URL = IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
2333 OPT_REALM = IF_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
2334 OPT_MD5 = IF_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
2335 OPT_SETUID = IF_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
2336 OPT_PORT = 1 << p_opt_port,
2337 OPT_INETD = 1 << p_opt_inetd,
2338 OPT_FOREGROUND = 1 << p_opt_foreground,
2339 OPT_VERBOSE = 1 << p_opt_verbose,
2343 int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
2344 int httpd_main(int argc UNUSED_PARAM, char **argv)
2346 int server_socket = server_socket; /* for gcc */
2348 char *url_for_decode;
2349 IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
2350 IF_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
2351 IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
2352 IF_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
2356 #if ENABLE_LOCALE_SUPPORT
2357 /* Undo busybox.c: we want to speak English in http (dates etc) */
2358 setlocale(LC_TIME, "C");
2361 home_httpd = xrealloc_getcwd_or_warn(NULL);
2362 /* -v counts, -i implies -f */
2363 opt_complementary = "vv:if";
2364 /* We do not "absolutize" path given by -h (home) opt.
2365 * If user gives relative path in -h,
2366 * $SCRIPT_FILENAME will not be set. */
2367 opt = getopt32(argv, "c:d:h:"
2368 IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
2369 IF_FEATURE_HTTPD_BASIC_AUTH("r:")
2370 IF_FEATURE_HTTPD_AUTH_MD5("m:")
2371 IF_FEATURE_HTTPD_SETUID("u:")
2373 &opt_c_configFile, &url_for_decode, &home_httpd
2374 IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
2375 IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
2376 IF_FEATURE_HTTPD_AUTH_MD5(, &pass)
2377 IF_FEATURE_HTTPD_SETUID(, &s_ugid)
2378 , &bind_addr_or_port
2381 if (opt & OPT_DECODE_URL) {
2382 fputs(decodeString(url_for_decode, 1), stdout);
2385 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
2386 if (opt & OPT_ENCODE_URL) {
2387 fputs(encodeString(url_for_encode), stdout);
2391 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
2392 if (opt & OPT_MD5) {
2393 char salt[sizeof("$1$XXXXXXXX")];
2397 crypt_make_salt(salt + 3, 4, 0);
2398 puts(pw_encrypt(pass, salt, 1));
2402 #if ENABLE_FEATURE_HTTPD_SETUID
2403 if (opt & OPT_SETUID) {
2404 xget_uidgid(&ugid, s_ugid);
2409 if (!(opt & OPT_FOREGROUND)) {
2410 bb_daemonize_or_rexec(0, argv); /* don't change current directory */
2415 if (!(opt & OPT_INETD)) {
2416 signal(SIGCHLD, SIG_IGN);
2417 server_socket = openServer();
2418 #if ENABLE_FEATURE_HTTPD_SETUID
2419 /* drop privileges */
2420 if (opt & OPT_SETUID) {
2421 if (ugid.gid != (gid_t)-1) {
2422 if (setgroups(1, &ugid.gid) == -1)
2423 bb_perror_msg_and_die("setgroups");
2432 /* User can do it himself: 'env - PATH="$PATH" httpd'
2433 * We don't do it because we don't want to screw users
2435 * 'env - VAR1=val1 VAR2=val2 httpd'
2436 * and have VAR1 and VAR2 values visible in their CGIs.
2437 * Besides, it is also smaller. */
2439 char *p = getenv("PATH");
2440 /* env strings themself are not freed, no need to xstrdup(p): */
2444 // if (!(opt & OPT_INETD))
2445 // setenv_long("SERVER_PORT", ???);
2449 parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
2450 if (!(opt & OPT_INETD))
2451 signal(SIGHUP, sighup_handler);
2453 xfunc_error_retval = 0;
2454 if (opt & OPT_INETD)
2457 if (!(opt & OPT_FOREGROUND))
2458 bb_daemonize(0); /* don't change current directory */
2459 mini_httpd(server_socket); /* never returns */
2461 mini_httpd_nommu(server_socket, argc, argv); /* never returns */