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 * simplify patch stolen from libbb without using strdup
10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 *****************************************************************************
16 * httpd -p 8080 -h $HOME/public_html
17 * or for daemon start from rc script with uid=0:
19 * This is equivalent if www user have uid=80 to
20 * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
23 * When a url contains "cgi-bin" it is assumed to be a cgi script. The
24 * server changes directory to the location of the script and executes it
25 * after setting QUERY_STRING and other environment variables.
28 * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
30 * The server can also be invoked as a url arg decoder and html text encoder
32 * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
33 * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
34 * Note that url encoding for arguments is not the same as html encoding for
35 * presentation. -d decodes a url-encoded argument while -e encodes in html
38 * httpd.conf has the following format:
40 * A:172.20. # Allow address from 172.20.0.0/16
41 * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
42 * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
43 * A:127.0.0.1 # Allow local loopback connections
44 * D:* # Deny from other IP connections
45 * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
46 * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
47 * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
48 * .au:audio/basic # additional mime type for audio.au files
49 * *.php:/path/php # running cgi.php scripts through an interpreter
51 * A/D may be as a/d or allow/deny - first char case insensitive
52 * Deny IP rules take precedence over allow rules.
55 * The Deny/Allow IP logic:
57 * - Default is to allow all. No addresses are denied unless
58 * denied with a D: rule.
59 * - Order of Deny/Allow rules is significant
60 * - Deny rules take precedence over allow rules.
61 * - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
63 * - Specification of Allow all (A:*) is a no-op
66 * 1. Allow only specified addresses
67 * A:172.20 # Allow any address that begins with 172.20.
68 * A:10.10. # Allow any address that begins with 10.10.
69 * A:127.0.0.1 # Allow local loopback connections
70 * D:* # Deny from other IP connections
72 * 2. Only deny specified addresses
73 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
74 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
75 * A:* # (optional line added for clarity)
77 * If a sub directory contains a config file it is parsed and merged with
78 * any existing settings as if it was appended to the original configuration.
80 * subdir paths are relative to the containing subdir and thus cannot
81 * affect the parent rules.
83 * Note that since the sub dir is parsed in the forked thread servicing the
84 * subdir http request, any merge is discarded when the process exits. As a
85 * result, the subdir settings only have a lifetime of a single request.
88 * If -c is not set, an attempt will be made to open the default
89 * root configuration file. If -c is set and the file is not found, the
90 * server exits with an error.
96 /* amount of buffering in a pipe */
98 # define PIPE_BUF 4096
101 static const char default_path_httpd_conf[] = "/etc";
102 static const char httpd_conf[] = "httpd.conf";
106 // Note: busybox xfuncs are not used because we want the server to keep running
107 // if something bad happens due to a malformed user request.
108 // As a result, all memory allocation after daemonize
109 // is checked rigorously
114 #define MAX_MEMORY_BUFF 8192 /* IO buffer */
116 typedef struct HT_ACCESS {
118 struct HT_ACCESS *next;
119 char before_colon[1]; /* really bigger, must last */
122 typedef struct HT_ACCESS_IP {
126 struct HT_ACCESS_IP *next;
132 volatile smallint alarm_signaled;
133 smallint flg_deny_all;
135 const char *configFile;
136 const char *home_httpd;
139 const char *found_mime_type;
140 const char *found_moved_temporarily;
141 off_t ContentLength; /* -1 - unknown */
143 Htaccess_IP *ip_a_d; /* config allow/deny lines */
145 USE_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
146 USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
147 USE_FEATURE_HTTPD_CGI(char *referer;)
148 USE_FEATURE_HTTPD_CGI(char *user_agent;)
150 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
151 char *rmt_ip_str; /* for set env REMOTE_ADDR */
153 unsigned tcp_port; /* server initial port and for
154 set env REMOTE_PORT */
155 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
156 Htaccess *g_auth; /* config user:password lines */
158 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
159 Htaccess *mime_a; /* config mime types */
161 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
162 Htaccess *script_i; /* config script interpreters */
164 char iobuf[MAX_MEMORY_BUFF];
166 #define G (*ptr_to_globals)
167 #define server_socket (G.server_socket )
168 #define accepted_socket (G.accepted_socket)
169 #define alarm_signaled (G.alarm_signaled )
170 #define flg_deny_all (G.flg_deny_all )
171 #define g_query (G.g_query )
172 #define configFile (G.configFile )
173 #define home_httpd (G.home_httpd )
174 #define rmt_ip (G.rmt_ip )
175 #define found_mime_type (G.found_mime_type)
176 #define found_moved_temporarily (G.found_moved_temporarily)
177 #define ContentLength (G.ContentLength )
178 #define last_mod (G.last_mod )
179 #define ip_a_d (G.ip_a_d )
180 #define g_realm (G.g_realm )
181 #define remoteuser (G.remoteuser )
182 #define referer (G.referer )
183 #define user_agent (G.user_agent )
184 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
185 #define rmt_ip_str (G.rmt_ip_str )
187 #define tcp_port (G.tcp_port )
188 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
189 #define g_auth (G.g_auth )
191 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
192 #define mime_a (G.mime_a )
194 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
195 #define script_i (G.script_i )
197 #define iobuf (G.iobuf )
198 #define INIT_G() do { \
199 PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
200 USE_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
202 ContentLength = -1; \
205 static const char request_GET[] = "GET"; /* size algorithmic optimize */
207 static const char* const suffixTable [] = {
208 /* Warning: shorted equivalent suffix in one line must be first */
209 ".htm.html", "text/html",
210 ".jpg.jpeg", "image/jpeg",
213 ".txt.h.c.cc.cpp", "text/plain",
216 ".avi", "video/x-msvideo",
217 ".qt.mov", "video/quicktime",
218 ".mpe.mpeg", "video/mpeg",
219 ".mid.midi", "audio/midi",
220 ".mp3", "audio/mpeg",
221 #if 0 /* unpopular */
222 ".au", "audio/basic",
223 ".pac", "application/x-ns-proxy-autoconfig",
224 ".vrml.wrl", "model/vrml",
226 0, "application/octet-stream" /* default */
231 HTTP_MOVED_TEMPORARILY = 302,
232 HTTP_BAD_REQUEST = 400, /* malformed syntax */
233 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
234 HTTP_NOT_FOUND = 404,
235 HTTP_FORBIDDEN = 403,
236 HTTP_REQUEST_TIMEOUT = 408,
237 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
238 HTTP_INTERNAL_SERVER_ERROR = 500,
239 #if 0 /* future use */
241 HTTP_SWITCHING_PROTOCOLS = 101,
244 HTTP_NON_AUTHORITATIVE_INFO = 203,
245 HTTP_NO_CONTENT = 204,
246 HTTP_MULTIPLE_CHOICES = 300,
247 HTTP_MOVED_PERMANENTLY = 301,
248 HTTP_NOT_MODIFIED = 304,
249 HTTP_PAYMENT_REQUIRED = 402,
250 HTTP_BAD_GATEWAY = 502,
251 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
252 HTTP_RESPONSE_SETSIZE = 0xffffffff
257 HttpResponseNum type;
262 static const HttpEnumString httpResponseNames[] = {
263 { HTTP_OK, "OK", NULL },
264 { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
265 { HTTP_REQUEST_TIMEOUT, "Request Timeout",
266 "No request appeared within a reasonable time period." },
267 { HTTP_NOT_IMPLEMENTED, "Not Implemented",
268 "The requested method is not recognized by this server." },
269 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
270 { HTTP_UNAUTHORIZED, "Unauthorized", "" },
272 { HTTP_NOT_FOUND, "Not Found",
273 "The requested URL was not found on this server." },
274 { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
275 { HTTP_FORBIDDEN, "Forbidden", "" },
276 { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
277 "Internal Server Error" },
278 #if 0 /* not implemented */
279 { HTTP_CREATED, "Created" },
280 { HTTP_ACCEPTED, "Accepted" },
281 { HTTP_NO_CONTENT, "No Content" },
282 { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
283 { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
284 { HTTP_NOT_MODIFIED, "Not Modified" },
285 { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
286 { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
291 static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
294 #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
297 static int scan_ip(const char **ep, unsigned *ip, unsigned char endc)
304 for (j = 0; j < 4; j++) {
307 if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
310 while (*p >= '0' && *p <= '9') {
319 if (*p != '/' && *p != 0)
321 *ip = ((*ip) << 8) | octet;
334 static int scan_ip_mask(const char *ipm, unsigned *ip, unsigned *mask)
339 i = scan_ip(&ipm, ip, '/');
347 if (*p < '0' || *p > '9') {
349 i = scan_ip(&ipm, mask, 0);
371 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
372 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
373 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
374 static void free_config_lines(Htaccess **pprev)
376 Htaccess *prev = *pprev;
379 Htaccess *cur = prev;
389 #define FIRST_PARSE 0
390 #define SUBDIR_PARSE 1
391 #define SIGNALED_PARSE 2
392 #define FIND_FROM_HTTPD_ROOT 3
393 /****************************************************************************
395 > $Function: parse_conf()
397 * $Description: parse configuration file into in-memory linked list.
399 * The first non-white character is examined to determine if the config line
400 * is one of the following:
401 * .ext:mime/type # new mime type not compiled into httpd
402 * [adAD]:from # ip address allow/deny, * for wildcard
403 * /path:user:pass # username/password
405 * Any previous IP rules are discarded.
406 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
407 * are also discarded. That is, previous settings are retained if flag is
411 * (const char *) path . . null for ip address checks, path for password
413 * (int) flag . . . . . . the source of the parse request.
417 ****************************************************************************/
418 static void parse_conf(const char *path, int flag)
421 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
424 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
425 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
426 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
430 const char *cf = configFile;
435 /* free previous ip setup if present */
436 Htaccess_IP *pip = ip_a_d;
439 Htaccess_IP *cur_ipl = pip;
448 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
449 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
450 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
451 /* retain previous auth and mime config only for subdir parse */
452 if (flag != SUBDIR_PARSE) {
453 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
454 free_config_lines(&g_auth);
456 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
457 free_config_lines(&mime_a);
459 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
460 free_config_lines(&script_i);
465 if (flag == SUBDIR_PARSE || cf == NULL) {
466 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
468 if (flag == FIRST_PARSE)
469 bb_error_msg_and_die(bb_msg_memory_exhausted);
472 sprintf((char *)cf, "%s/%s", path, httpd_conf);
475 while ((f = fopen(cf, "r")) == NULL) {
476 if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
477 /* config file not found, no changes to config */
480 if (configFile && flag == FIRST_PARSE) /* if -c option given */
481 bb_perror_msg_and_die("%s", cf);
482 flag = FIND_FROM_HTTPD_ROOT;
486 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
489 /* This could stand some work */
490 while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
492 for (p = p0; *p0 != 0 && *p0 != '#'; p0++) {
495 if (*p0 == ':' && c == NULL)
501 /* test for empty or strange line */
502 if (c == NULL || *c == 0)
509 /* memorize deny all */
512 /* skip default other "word:*" config lines */
518 else if (*p0 != 'D' && *p0 != 'A'
519 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
522 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
525 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
530 if (*p0 == 'A' || *p0 == 'D') {
531 /* storing current config IP line */
532 pip = xzalloc(sizeof(Htaccess_IP));
534 if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) {
535 /* syntax IP{/mask} error detected, protect all */
539 pip->allow_deny = *p0;
541 /* Deny:form_IP move top */
545 /* add to bottom A:form_IP config line */
546 Htaccess_IP *prev_IP = ip_a_d;
548 if (prev_IP == NULL) {
551 while (prev_IP->next)
552 prev_IP = prev_IP->next;
559 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
561 /* make full path from httpd root / curent_path / config_line_path */
562 cf = flag == SUBDIR_PARSE ? path : "";
563 p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
567 sprintf(p0, "/%s%s", cf, buf);
569 /* another call bb_simplify_path */
574 if (*cf == '/') { /* skip duplicate (or initial) slash */
576 } else if (*cf == '.') {
577 if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
579 } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
582 while (*--p != '/') /* omit previous dir */;
591 if ((p == p0) || (*p != '/')) { /* not a trailing slash */
592 ++p; /* so keep last character */
595 sprintf(p0, "%s:%s", p0, c);
599 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
600 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
601 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
602 /* storing current config line */
603 cur = xzalloc(sizeof(Htaccess) + strlen(p0));
605 cf = strcpy(cur->before_colon, p0);
608 cur->after_colon = c;
609 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
611 /* config .mime line move top for overwrite previous */
617 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
618 if (*cf == '*' && cf[1] == '.') {
619 /* config script interpreter line move top for overwrite previous */
620 cur->next = script_i;
625 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
631 /* sort path, if current lenght eq or bigger then move up */
632 Htaccess *prev_hti = g_auth;
633 size_t l = strlen(cf);
636 for (hti = prev_hti; hti; hti = hti->next) {
637 if (l >= strlen(hti->before_colon)) {
638 /* insert before hti */
640 if (prev_hti != hti) {
641 prev_hti->next = cur;
649 prev_hti = prev_hti->next;
651 if (!hti) { /* not inserted, add to bottom */
663 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
664 /****************************************************************************
666 > $Function: encodeString()
668 * $Description: Given a string, html encode special characters.
669 * This is used for the -e command line option to provide an easy way
670 * for scripts to encode result data without confusing browsers. The
671 * returned string pointer is memory allocated by malloc().
674 * (const char *) string . . The first string to encode.
676 * $Return: (char *) . . . .. . . A pointer to the encoded string.
678 * $Errors: Returns a null string ("") if memory is not available.
680 ****************************************************************************/
681 static char *encodeString(const char *string)
683 /* take the simple route and encode everything */
684 /* could possibly scan once to get length. */
685 int len = strlen(string);
686 char *out = xmalloc(len * 6 + 1);
690 while ((ch = *string++)) {
691 // very simple check for what to encode
692 if (isalnum(ch)) *p++ = ch;
693 else p += sprintf(p, "&#%d;", (unsigned char) ch);
698 #endif /* FEATURE_HTTPD_ENCODE_URL_STR */
700 /****************************************************************************
702 > $Function: decodeString()
704 * $Description: Given a URL encoded string, convert it to plain ascii.
705 * Since decoding always makes strings smaller, the decode is done in-place.
706 * Thus, callers should strdup() the argument if they do not want the
707 * argument modified. The return is the original pointer, allowing this
708 * function to be easily used as arguments to other functions.
711 * (char *) string . . . The first string to decode.
712 * (int) option_d . . 1 if called for httpd -d
714 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
718 ****************************************************************************/
719 static char *decodeString(char *orig, int option_d)
721 /* note that decoded string is always shorter than original */
726 while ((c = *ptr++) != '\0') {
727 unsigned value1, value2;
729 if (option_d && c == '+') {
737 if (sscanf(ptr, "%1X", &value1) != 1
738 || sscanf(ptr+1, "%1X", &value2) != 1
745 value1 = value1 * 16 + value2;
746 if (!option_d && (value1 == '/' || value1 == '\0')) {
747 /* caller takes it as indication of invalid
748 * (dangerous wrt exploits) chars */
759 #if ENABLE_FEATURE_HTTPD_CGI
760 /****************************************************************************
762 ****************************************************************************/
763 static void setenv1(const char *name, const char *value)
767 setenv(name, value, 1);
769 static void setenv_long(const char *name, long value)
771 char buf[sizeof(value)*3 + 1];
772 sprintf(buf, "%ld", value);
773 setenv(name, buf, 1);
777 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
778 /****************************************************************************
780 > $Function: decodeBase64()
782 > $Description: Decode a base 64 data stream as per rfc1521.
783 * Note that the rfc states that none base64 chars are to be ignored.
784 * Since the decode always results in a shorter size than the input, it is
785 * OK to pass the input arg as an output arg.
788 * (char *) Data . . . . A pointer to a base64 encoded string.
789 * Where to place the decoded data.
795 ****************************************************************************/
796 static void decodeBase64(char *Data)
798 const unsigned char *in = (const unsigned char *)Data;
799 // The decoded size will be at most 3/4 the size of the encoded
806 if (t >= '0' && t <= '9')
808 else if (t >= 'A' && t <= 'Z')
810 else if (t >= 'a' && t <= 'z')
824 *Data++ = (char) (ch >> 16);
825 *Data++ = (char) (ch >> 8);
835 /****************************************************************************
837 > $Function: openServer()
839 * $Description: create a listen server socket on the designated port.
841 * $Return: (int) . . . A connection socket. -1 for errors.
845 ****************************************************************************/
847 static int openServer(void)
851 /* create the socket right now */
852 fd = create_and_bind_stream_or_die(NULL, tcp_port);
858 /****************************************************************************
860 > $Function: sendHeaders()
862 * $Description: Create and send HTTP response headers.
863 * The arguments are combined and sent as one write operation. Note that
864 * IE will puke big-time if the headers are not sent in one packet and the
865 * second packet is delayed for any reason.
868 * (HttpResponseNum) responseNum . . . The result code to send.
870 * $Return: (int) . . . . writing errors
872 ****************************************************************************/
873 static int sendHeaders(HttpResponseNum responseNum)
876 const char *responseString = "";
877 const char *infoString = 0;
878 const char *mime_type;
880 time_t timer = time(0);
884 for (i = 0; i < ARRAY_SIZE(httpResponseNames); i++) {
885 if (httpResponseNames[i].type == responseNum) {
886 responseString = httpResponseNames[i].name;
887 infoString = httpResponseNames[i].info;
891 /* error message is HTML */
892 mime_type = responseNum == HTTP_OK ?
893 found_mime_type : "text/html";
895 /* emit the current date */
896 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
898 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
899 "Date: %s\r\nConnection: close\r\n",
900 responseNum, responseString, mime_type, timeStr);
902 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
903 if (responseNum == HTTP_UNAUTHORIZED) {
904 len += sprintf(buf+len,
905 "WWW-Authenticate: Basic realm=\"%s\"\r\n",
909 if (responseNum == HTTP_MOVED_TEMPORARILY) {
910 len += sprintf(buf+len, "Location: %s/%s%s\r\n",
911 found_moved_temporarily,
912 (g_query ? "?" : ""),
913 (g_query ? g_query : ""));
916 if (ContentLength != -1) { /* file */
917 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&last_mod));
918 len += sprintf(buf+len, "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
919 timeStr, "Content-length:", ContentLength);
924 len += sprintf(buf+len,
925 "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
926 "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
927 responseNum, responseString,
928 responseNum, responseString, infoString);
931 fprintf(stderr, "headers: '%s'\n", buf);
933 if (i == 0) i++; /* write to fd# 1 in inetd mode */
934 return full_write(i, buf, len);
937 /****************************************************************************
939 > $Function: getLine()
941 * $Description: Read from the socket until an end of line char found.
943 * Characters are read one at a time until an eol sequence is found.
945 * $Return: (int) . . . . number of characters read. -1 if error.
947 ****************************************************************************/
948 static int getLine(void)
953 while (read(accepted_socket, buf + count, 1) == 1) {
954 if (buf[count] == '\r') continue;
955 if (buf[count] == '\n') {
959 if (count < (MAX_MEMORY_BUFF-1)) /* check overflow */
962 if (count) return count;
966 #if ENABLE_FEATURE_HTTPD_CGI
967 /****************************************************************************
969 > $Function: sendCgi()
971 * $Description: Execute a CGI script and send it's stdout back
973 * Environment variables are set up and the script is invoked with pipes
974 * for stdin/stdout. If a post is being done the script is fed the POST
975 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
978 * (const char *) url . . . . . . The requested URL (with leading /).
979 * (int bodyLen) . . . . . . . . Length of the post body.
980 * (const char *cookie) . . . . . For set HTTP_COOKIE.
981 * (const char *content_type) . . For set CONTENT_TYPE.
983 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
987 ****************************************************************************/
988 static int sendCgi(const char *url,
989 const char *request, int bodyLen, const char *cookie,
990 const char *content_type)
992 int fromCgi[2]; /* pipe for reading data from CGI */
993 int toCgi[2]; /* pipe for sending data to CGI */
995 char *argp[] = { NULL, NULL };
1001 size_t post_read_size, post_read_idx;
1003 if (pipe(fromCgi) != 0)
1005 if (pipe(toCgi) != 0)
1009 * Note: We can use vfork() here in the no-mmu case, although
1010 * the child modifies the parent's variables, due to:
1011 * 1) The parent does not use the child-modified variables.
1012 * 2) The allocated memory (in the child) is freed when the process
1013 * exits. This happens instantly after the child finishes,
1014 * since httpd is run from inetd (and it can't run standalone
1018 // FIXME: setenv leaks memory! (old values of env vars are leaked)
1019 // Thus we have a bug on NOMMU.
1020 // Need to use this instead:
1021 // [malloc +] putenv + (in child: exec) + (in parent: unsetenv [+ free])
1037 if (accepted_socket > 1)
1038 close(accepted_socket);
1039 if (server_socket > 1)
1040 close(server_socket);
1042 xmove_fd(toCgi[0], 0); /* replace stdin with the pipe */
1043 xmove_fd(fromCgi[1], 1); /* replace stdout with the pipe */
1046 /* Huh? User seeing stderr can be a security problem...
1047 * and if CGI really wants that, it can always dup2(1,2)...
1048 * dup2(fromCgi[1], 2); */
1053 xfunc_error_retval = 242;
1054 purl = xstrdup(url);
1056 while ((script = strchr(script + 1, '/')) != NULL) {
1057 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1061 if (is_directory(purl + 1, 1, &sb) == 0) {
1062 /* not directory, found script.cgi/PATH_INFO */
1066 *script = '/'; /* is directory, find next '/' */
1068 setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
1069 setenv1("REQUEST_METHOD", request);
1071 char *uri = alloca(strlen(purl) + 2 + strlen(g_query));
1073 sprintf(uri, "%s?%s", purl, g_query);
1074 setenv1("REQUEST_URI", uri);
1076 setenv1("REQUEST_URI", purl);
1079 *script = '\0'; /* cut off /PATH_INFO */
1081 /* SCRIPT_FILENAME required by PHP in CGI mode */
1082 fullpath = concat_path_file(home_httpd, purl);
1083 setenv1("SCRIPT_FILENAME", fullpath);
1084 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1085 setenv1("SCRIPT_NAME", purl);
1086 /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
1087 * QUERY_STRING: The information which follows the ? in the URL
1088 * which referenced this script. This is the query information.
1089 * It should not be decoded in any fashion. This variable
1090 * should always be set when there is query information,
1091 * regardless of command line decoding. */
1092 /* (Older versions of bbox seem to do some decoding) */
1093 setenv1("QUERY_STRING", g_query);
1094 putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
1095 putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
1096 putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
1097 /* Having _separate_ variables for IP and port defeats
1098 * the purpose of having socket abstraction. Which "port"
1099 * are you using on Unix domain socket?
1100 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
1103 char *p = rmt_ip_str ? : (char*)"";
1104 char *cp = strrchr(p, ':');
1105 if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
1107 if (cp) *cp = '\0'; /* delete :PORT */
1108 setenv1("REMOTE_ADDR", p);
1111 setenv1("HTTP_USER_AGENT", user_agent);
1112 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1113 setenv_long("REMOTE_PORT", tcp_port);
1116 setenv_long("CONTENT_LENGTH", bodyLen);
1118 setenv1("HTTP_COOKIE", cookie);
1120 setenv1("CONTENT_TYPE", content_type);
1121 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1123 setenv1("REMOTE_USER", remoteuser);
1124 putenv((char*)"AUTH_TYPE=Basic");
1128 setenv1("HTTP_REFERER", referer);
1130 /* set execve argp[0] without path */
1131 argp[0] = (char*)bb_basename(purl);
1132 /* but script argp[0] must have absolute path and chdiring to this */
1133 script = strrchr(fullpath, '/');
1135 goto error_execing_cgi;
1137 if (chdir(fullpath) == 0) {
1138 // Now run the program. If it fails,
1139 // use _exit() so no destructors
1140 // get called and make a mess.
1141 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1142 char *interpr = NULL;
1143 char *suffix = strrchr(purl, '.');
1147 for (cur = script_i; cur; cur = cur->next) {
1148 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1149 interpr = cur->after_colon;
1156 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1158 execv(interpr, argp);
1161 execv(fullpath, argp);
1164 /* send to stdout (even if we are not from inetd) */
1165 accepted_socket = 1;
1166 sendHeaders(HTTP_NOT_FOUND);
1170 /* parent process */
1177 post_read_idx = 0; /* for gcc */
1182 signal(SIGPIPE, SIG_IGN);
1193 FD_SET(inFd, &readSet);
1194 if (bodyLen > 0 || post_read_size > 0) {
1195 FD_SET(outFd, &writeSet);
1196 nfound = outFd > inFd ? outFd : inFd;
1197 if (post_read_size == 0) {
1198 FD_SET(accepted_socket, &readSet);
1199 if (nfound < accepted_socket)
1200 nfound = accepted_socket;
1202 /* Now wait on the set of sockets! */
1203 nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL);
1206 close(outFd); /* no more POST data to CGI */
1209 nfound = select(inFd + 1, &readSet, NULL, NULL, NULL);
1213 if (waitpid(pid, &status, WNOHANG) <= 0) {
1214 /* Weird. CGI didn't exit and no fd's
1215 * are ready, yet select returned?! */
1219 if (DEBUG && WIFEXITED(status))
1220 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1221 if (DEBUG && WIFSIGNALED(status))
1222 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1226 if (post_read_size > 0 && FD_ISSET(outFd, &writeSet)) {
1227 /* Have data from peer and can write to CGI */
1228 // huh? why full_write? what if we will block?
1229 // (imagine that CGI does not read its stdin...)
1230 count = full_write(outFd, wbuf + post_read_idx, post_read_size);
1232 post_read_idx += count;
1233 post_read_size -= count;
1235 post_read_size = bodyLen = 0; /* broken pipe to CGI */
1237 } else if (bodyLen > 0 && post_read_size == 0
1238 && FD_ISSET(accepted_socket, &readSet)
1240 /* We expect data, prev data portion is eaten by CGI
1241 * and there *is* data to read from the peer
1243 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1244 count = safe_read(accepted_socket, wbuf, count);
1246 post_read_size = count;
1250 bodyLen = 0; /* closed */
1254 #define PIPESIZE PIPE_BUF
1255 #if PIPESIZE >= MAX_MEMORY_BUFF
1256 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1258 if (FD_ISSET(inFd, &readSet)) {
1259 /* There is something to read from CGI */
1260 int s = accepted_socket;
1263 /* Are we still buffering CGI output? */
1264 if (buf_count >= 0) {
1265 static const char HTTP_200[] = "HTTP/1.0 200 OK\r\n";
1266 /* Must use safe_read, not full_read, because
1267 * CGI may output a few first bytes and then wait
1268 * for POSTDATA without closing stdout.
1269 * With full_read we may wait here forever. */
1270 count = safe_read(inFd, rbuf + buf_count, PIPESIZE - 4);
1272 /* eof (or error) and there was no "HTTP",
1273 * so add one and write out the received data */
1275 full_write(s, HTTP_200, sizeof(HTTP_200)-1);
1276 full_write(s, rbuf, buf_count);
1282 if (buf_count >= 4) {
1283 /* check to see if CGI added "HTTP" */
1284 if (memcmp(rbuf, HTTP_200, 4) != 0) {
1285 /* there is no "HTTP", do it ourself */
1286 if (full_write(s, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
1289 /* example of valid CGI without "Content-type:"
1290 * echo -en "HTTP/1.0 302 Found\r\n"
1291 * echo -en "Location: http://www.busybox.net\r\n"
1293 if (!strstr(rbuf, "ontent-")) {
1294 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1298 buf_count = -1; /* buffering off */
1301 count = safe_read(inFd, rbuf, PIPESIZE);
1303 break; /* eof (or error) */
1305 if (full_write(s, rbuf, count) != count)
1308 fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
1309 } /* if (FD_ISSET(inFd)) */
1313 #endif /* FEATURE_HTTPD_CGI */
1315 /****************************************************************************
1317 > $Function: sendFile()
1319 * $Description: Send a file response to a HTTP request
1322 * (const char *) url . . The URL requested.
1324 * $Return: (int) . . . . . . Always 0.
1326 ****************************************************************************/
1327 static int sendFile(const char *url)
1331 const char * const * table;
1332 const char * try_suffix;
1334 suffix = strrchr(url, '.');
1336 for (table = suffixTable; *table; table += 2)
1337 if (suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1338 try_suffix += strlen(suffix);
1339 if (*try_suffix == 0 || *try_suffix == '.')
1342 /* also, if not found, set default as "application/octet-stream"; */
1343 found_mime_type = table[1];
1344 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1348 for (cur = mime_a; cur; cur = cur->next) {
1349 if (strcmp(cur->before_colon, suffix) == 0) {
1350 found_mime_type = cur->after_colon;
1355 #endif /* FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1358 fprintf(stderr, "sending file '%s' content-type: %s\n",
1359 url, found_mime_type);
1361 f = open(url, O_RDONLY);
1366 sendHeaders(HTTP_OK);
1367 /* TODO: sendfile() */
1368 while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1369 int fd = accepted_socket;
1370 if (fd == 0) fd++; /* write to fd# 1 in inetd mode */
1371 if (full_write(fd, buf, count) != count)
1377 bb_perror_msg("cannot open '%s'", url);
1378 sendHeaders(HTTP_NOT_FOUND);
1384 static int checkPermIP(void)
1388 /* This could stand some work */
1389 for (cur = ip_a_d; cur; cur = cur->next) {
1390 #if ENABLE_FEATURE_HTTPD_CGI && DEBUG
1391 fprintf(stderr, "checkPermIP: '%s' ? ", rmt_ip_str);
1394 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1395 (unsigned char)(cur->ip >> 24),
1396 (unsigned char)(cur->ip >> 16),
1397 (unsigned char)(cur->ip >> 8),
1398 (unsigned char)(cur->ip),
1399 (unsigned char)(cur->mask >> 24),
1400 (unsigned char)(cur->mask >> 16),
1401 (unsigned char)(cur->mask >> 8),
1402 (unsigned char)(cur->mask)
1405 if ((rmt_ip & cur->mask) == cur->ip)
1406 return cur->allow_deny == 'A'; /* Allow/Deny */
1409 /* if unconfigured, return 1 - access from all */
1410 return !flg_deny_all;
1413 /****************************************************************************
1415 > $Function: checkPerm()
1417 * $Description: Check the permission file for access password protected.
1419 * If config file isn't present, everything is allowed.
1420 * Entries are of the form you can see example from header source
1423 * (const char *) path . . . . The file path.
1424 * (const char *) request . . . User information to validate.
1426 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1428 ****************************************************************************/
1430 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1431 static int checkPerm(const char *path, const char *request)
1437 const char *prev = NULL;
1439 /* This could stand some work */
1440 for (cur = g_auth; cur; cur = cur->next) {
1443 p0 = cur->before_colon;
1444 if (prev != NULL && strcmp(prev, p0) != 0)
1445 continue; /* find next identical */
1446 p = cur->after_colon;
1448 fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
1451 if (strncmp(p0, path, l) == 0
1452 && (l == 1 || path[l] == '/' || path[l] == '\0')
1455 /* path match found. Check request */
1456 /* for check next /path:user:password */
1458 u = strchr(request, ':');
1460 /* bad request, ':' required */
1464 if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
1468 if (strncmp(p, request, u-request) != 0) {
1469 /* user uncompared */
1472 pp = strchr(p, ':');
1473 if (pp && pp[1] == '$' && pp[2] == '1' &&
1474 pp[3] == '$' && pp[4]) {
1476 cipher = pw_encrypt(u+1, pp);
1477 if (strcmp(cipher, pp) == 0)
1478 goto set_remoteuser_var; /* Ok */
1484 if (strcmp(p, request) == 0) {
1486 remoteuser = strdup(request);
1488 remoteuser[(u - request)] = 0;
1495 return prev == NULL;
1498 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1500 /****************************************************************************
1502 > $Function: handle_sigalrm()
1504 * $Description: Handle timeouts
1506 ****************************************************************************/
1508 static void handle_sigalrm(int sig)
1510 sendHeaders(HTTP_REQUEST_TIMEOUT);
1514 /****************************************************************************
1516 > $Function: handleIncoming()
1518 * $Description: Handle an incoming http request.
1520 ****************************************************************************/
1521 static void handleIncoming(void)
1530 #if ENABLE_FEATURE_HTTPD_CGI
1531 const char *prequest = request_GET;
1532 unsigned long length = 0;
1534 char *content_type = 0;
1539 struct sigaction sa;
1541 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1542 int credentials = -1; /* if not required this is Ok */
1545 sa.sa_handler = handle_sigalrm;
1546 sigemptyset(&sa.sa_mask);
1547 sa.sa_flags = 0; /* no SA_RESTART */
1548 sigaction(SIGALRM, &sa, NULL);
1553 (void) alarm(TIMEOUT);
1557 purl = strpbrk(buf, " \t");
1560 sendHeaders(HTTP_BAD_REQUEST);
1564 #if ENABLE_FEATURE_HTTPD_CGI
1565 if (strcasecmp(buf, prequest) != 0) {
1567 if (strcasecmp(buf, prequest) != 0) {
1568 sendHeaders(HTTP_NOT_IMPLEMENTED);
1573 if (strcasecmp(buf, request_GET) != 0) {
1574 sendHeaders(HTTP_NOT_IMPLEMENTED);
1579 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1581 if (count < 1 || buf[0] != '/') {
1582 /* Garbled request/URL */
1585 url = alloca(strlen(buf) + sizeof("/index.html"));
1587 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1591 /* extract url args if present */
1592 test = strchr(url, '?');
1599 test = decodeString(url, 0);
1602 if (test == url+1) {
1603 /* '/' or NUL is encoded */
1604 sendHeaders(HTTP_NOT_FOUND);
1608 /* algorithm stolen from libbb bb_simplify_path(),
1609 * but don't strdup and reducing trailing slash and protect out root */
1613 /* skip duplicate (or initial) slash */
1618 /* skip extra '.' */
1619 if (test[1] == '/' || !test[1]) {
1622 /* '..': be careful */
1623 if (test[1] == '.' && (test[2] == '/' || !test[2])) {
1626 /* protect out root */
1629 while (*--purl != '/') /* omit previous dir */;
1636 *++purl = '\0'; /* so keep last character */
1637 test = purl; /* end ptr */
1639 /* If URL is directory, adding '/' */
1640 if (test[-1] != '/') {
1641 if (is_directory(url + 1, 1, &sb)) {
1642 found_moved_temporarily = url;
1646 fprintf(stderr, "url='%s', args=%s\n", url, g_query);
1649 ip_allowed = checkPermIP();
1650 while (ip_allowed && (test = strchr(test + 1, '/')) != NULL) {
1651 /* have path1/path2 */
1653 if (is_directory(url + 1, 1, &sb)) {
1654 /* may be having subdir config */
1655 parse_conf(url + 1, SUBDIR_PARSE);
1656 ip_allowed = checkPermIP();
1661 /* read until blank line for HTTP version specified, else parse immediate */
1669 fprintf(stderr, "header: '%s'\n", buf);
1671 #if ENABLE_FEATURE_HTTPD_CGI
1672 /* try and do our best to parse more lines */
1673 if ((STRNCASECMP(buf, "Content-length:") == 0)) {
1674 /* extra read only for POST */
1675 if (prequest != request_GET) {
1676 test = buf + sizeof("Content-length:")-1;
1680 /* not using strtoul: it ignores leading munis! */
1681 length = strtol(test, &test, 10);
1682 /* length is "ulong", but we need to pass it to int later */
1683 /* so we check for negative or too large values in one go: */
1684 /* (long -> ulong conv caused negatives to be seen as > INT_MAX) */
1685 if (test[0] || errno || length > INT_MAX)
1688 } else if (STRNCASECMP(buf, "Cookie:") == 0) {
1689 cookie = strdup(skip_whitespace(buf + sizeof("Cookie:")-1));
1690 } else if (STRNCASECMP(buf, "Content-Type:") == 0)) {
1691 content_type = strdup(skip_whitespace(buf + sizeof("Content-Type:")-1));
1692 } else if (STRNCASECMP(buf, "Referer:") == 0) {
1693 referer = strdup(skip_whitespace(buf + sizeof("Referer:")-1));
1694 } else if (STRNCASECMP(buf, "User-Agent:") == 0) {
1695 user_agent = strdup(skip_whitespace(buf + sizeof("User-Agent:")-1));
1699 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1700 if (STRNCASECMP(buf, "Authorization:") == 0) {
1701 /* We only allow Basic credentials.
1702 * It shows up as "Authorization: Basic <userid:password>" where
1703 * the userid:password is base64 encoded.
1705 test = skip_whitespace(buf + sizeof("Authorization:")-1);
1706 if (STRNCASECMP(test, "Basic") != 0)
1708 test += sizeof("Basic")-1;
1709 /* decodeBase64() skips whitespace itself */
1711 credentials = checkPerm(url, test);
1713 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1715 } /* while extra header reading */
1721 if (strcmp(bb_basename(url), httpd_conf) == 0 || ip_allowed == 0) {
1722 /* protect listing [/path]/httpd_conf or IP deny */
1723 #if ENABLE_FEATURE_HTTPD_CGI
1724 FORBIDDEN: /* protect listing /cgi-bin */
1726 sendHeaders(HTTP_FORBIDDEN);
1730 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1731 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1732 sendHeaders(HTTP_UNAUTHORIZED);
1737 if (found_moved_temporarily) {
1738 sendHeaders(HTTP_MOVED_TEMPORARILY);
1739 /* clear unforked memory flag */
1740 found_moved_temporarily = NULL;
1744 test = url + 1; /* skip first '/' */
1746 #if ENABLE_FEATURE_HTTPD_CGI
1747 if (strncmp(test, "cgi-bin", 7) == 0) {
1748 if (test[7] == '/' && test[8] == 0)
1749 goto FORBIDDEN; /* protect listing cgi-bin/ */
1750 sendCgi(url, prequest, length, cookie, content_type);
1753 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1755 char *suffix = strrchr(test, '.');
1758 for (cur = script_i; cur; cur = cur->next) {
1759 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1760 sendCgi(url, prequest, length, cookie, content_type);
1767 if (prequest != request_GET) {
1768 sendHeaders(HTTP_NOT_IMPLEMENTED);
1771 #endif /* FEATURE_HTTPD_CGI */
1772 if (purl[-1] == '/')
1773 strcpy(purl, "index.html");
1774 if (stat(test, &sb) == 0) {
1775 /* It's a dir URL and there is index.html */
1776 ContentLength = sb.st_size;
1777 last_mod = sb.st_mtime;
1779 #if ENABLE_FEATURE_HTTPD_CGI
1780 else if (purl[-1] == '/') {
1781 /* It's a dir URL and there is no index.html
1782 * Try cgi-bin/index.cgi */
1783 if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
1786 sendCgi("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
1790 #endif /* FEATURE_HTTPD_CGI */
1795 #if ENABLE_FEATURE_HTTPD_CGI
1800 fprintf(stderr, "closing socket\n\n");
1801 #if ENABLE_FEATURE_HTTPD_CGI
1806 # if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1811 shutdown(accepted_socket, SHUT_WR);
1813 /* Properly wait for remote to closed */
1815 FD_SET(accepted_socket, &s_fd);
1820 retval = select(accepted_socket + 1, &s_fd, NULL, NULL, &tv);
1821 } while (retval > 0 && read(accepted_socket, buf, sizeof(iobuf) > 0));
1823 shutdown(accepted_socket, SHUT_RD);
1824 /* In inetd case, we close fd 1 (stdout) here. We will exit soon anyway */
1825 close(accepted_socket);
1829 /****************************************************************************
1831 > $Function: miniHttpd()
1833 * $Description: The main http server function.
1835 * Given an open socket fildes, listen for new connections and farm out
1836 * the processing as a forked process.
1839 * (int) server. . . The server socket fildes.
1841 * $Return: (int) . . . . Always 0.
1843 ****************************************************************************/
1844 static int miniHttpd(int server)
1846 fd_set readfd, portfd;
1849 FD_SET(server, &portfd);
1851 /* copy the ports we are watching to the readfd set */
1856 struct sockaddr_in sin;
1857 USE_FEATURE_IPV6(struct sockaddr_in6 sin6;)
1859 socklen_t fromAddrLen = sizeof(fromAddr);
1861 /* Now wait INDEFINITELY on the set of sockets! */
1863 if (select(server + 1, &readfd, 0, 0, 0) <= 0)
1865 if (!FD_ISSET(server, &readfd))
1867 s = accept(server, &fromAddr.sa, &fromAddrLen);
1870 accepted_socket = s;
1873 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1875 rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen);
1877 bb_error_msg("connection from '%s'", rmt_ip_str);
1879 #endif /* FEATURE_HTTPD_CGI */
1880 if (fromAddr.sa.sa_family == AF_INET) {
1881 rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1882 tcp_port = ntohs(fromAddr.sin.sin_port);
1884 #if ENABLE_FEATURE_IPV6
1885 if (fromAddr.sa.sa_family == AF_INET6) {
1886 //rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1887 tcp_port = ntohs(fromAddr.sin6.sin6_port);
1891 /* set the KEEPALIVE option to cull dead connections */
1892 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
1894 if (DEBUG || fork() == 0) {
1896 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1897 /* protect reload config, may be confuse checking */
1898 signal(SIGHUP, SIG_IGN);
1911 static int miniHttpd_inetd(void)
1915 struct sockaddr_in sin;
1916 USE_FEATURE_IPV6(struct sockaddr_in6 sin6;)
1918 socklen_t fromAddrLen = sizeof(fromAddr);
1920 getpeername(0, &fromAddr.sa, &fromAddrLen);
1923 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1925 rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen);
1927 if (fromAddr.sa.sa_family == AF_INET) {
1928 rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1929 tcp_port = ntohs(fromAddr.sin.sin_port);
1931 #if ENABLE_FEATURE_IPV6
1932 if (fromAddr.sa.sa_family == AF_INET6) {
1933 //rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1934 tcp_port = ntohs(fromAddr.sin6.sin6_port);
1941 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1942 static void sighup_handler(int sig)
1945 struct sigaction sa;
1947 parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1948 sa.sa_handler = sighup_handler;
1949 sigemptyset(&sa.sa_mask);
1950 sa.sa_flags = SA_RESTART;
1951 sigaction(SIGHUP, &sa, NULL);
1956 c_opt_config_file = 0,
1959 USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
1960 USE_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
1961 USE_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
1962 USE_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
1966 OPT_CONFIG_FILE = 1 << c_opt_config_file,
1967 OPT_DECODE_URL = 1 << d_opt_decode_url,
1968 OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
1969 OPT_ENCODE_URL = USE_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
1970 OPT_REALM = USE_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
1971 OPT_MD5 = USE_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
1972 OPT_SETUID = USE_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
1973 OPT_PORT = 1 << p_opt_port,
1974 OPT_INETD = 1 << p_opt_inetd,
1975 OPT_FOREGROUND = 1 << p_opt_foreground,
1979 int httpd_main(int argc, char **argv);
1980 int httpd_main(int argc, char **argv)
1983 char *url_for_decode;
1984 USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
1986 USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
1987 USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
1988 USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
1990 #if ENABLE_LOCALE_SUPPORT
1991 /* Undo busybox.c: we want to speak English in http (dates etc) */
1992 setlocale(LC_TIME, "C");
1996 home_httpd = xrealloc_getcwd_or_warn(NULL);
1997 /* We do not "absolutize" path given by -h (home) opt.
1998 * If user gives relative path in -h, $SCRIPT_FILENAME can end up
2000 opt = getopt32(argc, argv, "c:d:h:"
2001 USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
2002 USE_FEATURE_HTTPD_BASIC_AUTH("r:")
2003 USE_FEATURE_HTTPD_AUTH_MD5("m:")
2004 USE_FEATURE_HTTPD_SETUID("u:")
2006 &(configFile), &url_for_decode, &home_httpd
2007 USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
2008 USE_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
2009 USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
2010 USE_FEATURE_HTTPD_SETUID(, &s_ugid)
2013 if (opt & OPT_DECODE_URL) {
2014 printf("%s", decodeString(url_for_decode, 1));
2017 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
2018 if (opt & OPT_ENCODE_URL) {
2019 printf("%s", encodeString(url_for_encode));
2023 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
2024 if (opt & OPT_MD5) {
2025 puts(pw_encrypt(pass, "$1$"));
2030 tcp_port = xatou16(s_port);
2032 #if ENABLE_FEATURE_HTTPD_SETUID
2033 if (opt & OPT_SETUID) {
2034 if (!get_uidgid(&ugid, s_ugid, 1))
2035 bb_error_msg_and_die("unrecognized user[:group] "
2036 "name '%s'", s_ugid);
2041 if (!(opt & OPT_INETD)) {
2043 signal(SIGCHLD, SIG_IGN);
2044 server_socket = openServer();
2045 #if ENABLE_FEATURE_HTTPD_SETUID
2046 /* drop privileges */
2047 if (opt & OPT_SETUID) {
2048 if (ugid.gid != (gid_t)-1) {
2049 if (setgroups(1, &ugid.gid) == -1)
2050 bb_perror_msg_and_die("setgroups");
2057 bb_error_msg_and_die("-i is required");
2061 #if ENABLE_FEATURE_HTTPD_CGI
2063 char *p = getenv("PATH");
2064 /* env strings themself are not freed, no need to strdup(p): */
2068 if (!(opt & OPT_INETD))
2069 setenv_long("SERVER_PORT", tcp_port);
2073 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2076 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2079 if (opt & OPT_INETD)
2080 return miniHttpd_inetd();
2083 if (!(opt & OPT_FOREGROUND))
2084 bb_daemonize(0); /* don't change current directory */
2085 return miniHttpd(server_socket);
2087 return 0; /* not reached */