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 httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
102 static const char default_path_httpd_conf[] = "/etc";
103 static const char httpd_conf[] = "httpd.conf";
104 static const char home[] = "./";
108 // Note: busybox xfuncs are not used because we want the server to keep running
109 // if something bad happens due to a malformed user request.
110 // As a result, all memory allocation after daemonize
111 // is checked rigorously
116 #define MAX_MEMORY_BUFF 8192 /* IO buffer */
118 typedef struct HT_ACCESS {
120 struct HT_ACCESS *next;
121 char before_colon[1]; /* really bigger, must last */
124 typedef struct HT_ACCESS_IP {
128 struct HT_ACCESS_IP *next;
132 char buf[MAX_MEMORY_BUFF];
134 USE_FEATURE_HTTPD_BASIC_AUTH(const char *realm;)
135 USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
139 USE_FEATURE_HTTPD_CGI(char *referer;)
141 const char *configFile;
144 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
145 char *rmt_ip_str; /* for set env REMOTE_ADDR */
147 unsigned port; /* server initial port and for
148 set env REMOTE_PORT */
149 const char *found_mime_type;
150 const char *found_moved_temporarily;
152 off_t ContentLength; /* -1 - unknown */
155 Htaccess_IP *ip_a_d; /* config allow/deny lines */
157 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
158 Htaccess *auth; /* config user:password lines */
160 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
161 Htaccess *mime_a; /* config mime types */
166 volatile int alarm_signaled;
168 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
169 Htaccess *script_i; /* config script interpreters */
173 static HttpdConfig *config;
175 static const char request_GET[] = "GET"; /* size algorithmic optimize */
177 static const char* const suffixTable [] = {
178 /* Warning: shorted equivalent suffix in one line must be first */
179 ".htm.html", "text/html",
180 ".jpg.jpeg", "image/jpeg",
183 ".txt.h.c.cc.cpp", "text/plain",
186 ".avi", "video/x-msvideo",
187 ".qt.mov", "video/quicktime",
188 ".mpe.mpeg", "video/mpeg",
189 ".mid.midi", "audio/midi",
190 ".mp3", "audio/mpeg",
191 #if 0 /* unpopular */
192 ".au", "audio/basic",
193 ".pac", "application/x-ns-proxy-autoconfig",
194 ".vrml.wrl", "model/vrml",
196 0, "application/octet-stream" /* default */
201 HTTP_MOVED_TEMPORARILY = 302,
202 HTTP_BAD_REQUEST = 400, /* malformed syntax */
203 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
204 HTTP_NOT_FOUND = 404,
205 HTTP_FORBIDDEN = 403,
206 HTTP_REQUEST_TIMEOUT = 408,
207 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
208 HTTP_INTERNAL_SERVER_ERROR = 500,
209 #if 0 /* future use */
211 HTTP_SWITCHING_PROTOCOLS = 101,
214 HTTP_NON_AUTHORITATIVE_INFO = 203,
215 HTTP_NO_CONTENT = 204,
216 HTTP_MULTIPLE_CHOICES = 300,
217 HTTP_MOVED_PERMANENTLY = 301,
218 HTTP_NOT_MODIFIED = 304,
219 HTTP_PAYMENT_REQUIRED = 402,
220 HTTP_BAD_GATEWAY = 502,
221 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
222 HTTP_RESPONSE_SETSIZE = 0xffffffff
227 HttpResponseNum type;
232 static const HttpEnumString httpResponseNames[] = {
233 { HTTP_OK, "OK", NULL },
234 { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
235 { HTTP_REQUEST_TIMEOUT, "Request Timeout",
236 "No request appeared within a reasonable time period." },
237 { HTTP_NOT_IMPLEMENTED, "Not Implemented",
238 "The requested method is not recognized by this server." },
239 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
240 { HTTP_UNAUTHORIZED, "Unauthorized", "" },
242 { HTTP_NOT_FOUND, "Not Found",
243 "The requested URL was not found on this server." },
244 { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
245 { HTTP_FORBIDDEN, "Forbidden", "" },
246 { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
247 "Internal Server Error" },
248 #if 0 /* not implemented */
249 { HTTP_CREATED, "Created" },
250 { HTTP_ACCEPTED, "Accepted" },
251 { HTTP_NO_CONTENT, "No Content" },
252 { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
253 { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
254 { HTTP_NOT_MODIFIED, "Not Modified" },
255 { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
256 { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
261 static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
264 #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
267 static int scan_ip(const char **ep, unsigned int *ip, unsigned char endc)
274 for (j = 0; j < 4; j++) {
277 if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
280 while (*p >= '0' && *p <= '9') {
289 if (*p != '/' && *p != 0)
291 *ip = ((*ip) << 8) | octet;
304 static int scan_ip_mask(const char *ipm, unsigned int *ip, unsigned int *mask)
309 i = scan_ip(&ipm, ip, '/');
317 if (*p < '0' || *p > '9') {
319 i = scan_ip(&ipm, mask, 0);
341 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
342 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
343 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
344 static void free_config_lines(Htaccess **pprev)
346 Htaccess *prev = *pprev;
349 Htaccess *cur = prev;
359 #define FIRST_PARSE 0
360 #define SUBDIR_PARSE 1
361 #define SIGNALED_PARSE 2
362 #define FIND_FROM_HTTPD_ROOT 3
363 /****************************************************************************
365 > $Function: parse_conf()
367 * $Description: parse configuration file into in-memory linked list.
369 * The first non-white character is examined to determine if the config line
370 * is one of the following:
371 * .ext:mime/type # new mime type not compiled into httpd
372 * [adAD]:from # ip address allow/deny, * for wildcard
373 * /path:user:pass # username/password
375 * Any previous IP rules are discarded.
376 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
377 * are also discarded. That is, previous settings are retained if flag is
381 * (const char *) path . . null for ip address checks, path for password
383 * (int) flag . . . . . . the source of the parse request.
387 ****************************************************************************/
388 static void parse_conf(const char *path, int flag)
391 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
394 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
395 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
396 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
400 const char *cf = config->configFile;
405 /* free previous ip setup if present */
406 Htaccess_IP *pip = config->ip_a_d;
409 Htaccess_IP *cur_ipl = pip;
414 config->ip_a_d = NULL;
416 config->flg_deny_all = 0;
418 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
419 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
420 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
421 /* retain previous auth and mime config only for subdir parse */
422 if (flag != SUBDIR_PARSE) {
423 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
424 free_config_lines(&config->auth);
426 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
427 free_config_lines(&config->mime_a);
429 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
430 free_config_lines(&config->script_i);
435 if (flag == SUBDIR_PARSE || cf == NULL) {
436 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
438 if (flag == FIRST_PARSE)
439 bb_error_msg_and_die(bb_msg_memory_exhausted);
442 sprintf((char *)cf, "%s/%s", path, httpd_conf);
445 while ((f = fopen(cf, "r")) == NULL) {
446 if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
447 /* config file not found, no changes to config */
450 if (config->configFile && flag == FIRST_PARSE) /* if -c option given */
451 bb_perror_msg_and_die("%s", cf);
452 flag = FIND_FROM_HTTPD_ROOT;
456 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
459 /* This could stand some work */
460 while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
462 for (p = p0; *p0 != 0 && *p0 != '#'; p0++) {
465 if (*p0 == ':' && c == NULL)
471 /* test for empty or strange line */
472 if (c == NULL || *c == 0)
479 /* memorize deny all */
480 config->flg_deny_all++;
482 /* skip default other "word:*" config lines */
488 else if (*p0 != 'D' && *p0 != 'A'
489 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
492 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
495 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
500 if (*p0 == 'A' || *p0 == 'D') {
501 /* storing current config IP line */
502 pip = xzalloc(sizeof(Htaccess_IP));
504 if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) {
505 /* syntax IP{/mask} error detected, protect all */
509 pip->allow_deny = *p0;
511 /* Deny:form_IP move top */
512 pip->next = config->ip_a_d;
513 config->ip_a_d = pip;
515 /* add to bottom A:form_IP config line */
516 Htaccess_IP *prev_IP = config->ip_a_d;
518 if (prev_IP == NULL) {
519 config->ip_a_d = pip;
521 while (prev_IP->next)
522 prev_IP = prev_IP->next;
529 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
531 /* make full path from httpd root / curent_path / config_line_path */
532 cf = flag == SUBDIR_PARSE ? path : "";
533 p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
537 sprintf(p0, "/%s%s", cf, buf);
539 /* another call bb_simplify_path */
544 if (*cf == '/') { /* skip duplicate (or initial) slash */
546 } else if (*cf == '.') {
547 if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
549 } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
552 while (*--p != '/') /* omit previous dir */;
561 if ((p == p0) || (*p != '/')) { /* not a trailing slash */
562 ++p; /* so keep last character */
565 sprintf(p0, "%s:%s", p0, c);
569 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
570 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
571 || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
572 /* storing current config line */
573 cur = xzalloc(sizeof(Htaccess) + strlen(p0));
575 cf = strcpy(cur->before_colon, p0);
578 cur->after_colon = c;
579 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
581 /* config .mime line move top for overwrite previous */
582 cur->next = config->mime_a;
583 config->mime_a = cur;
587 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
588 if (*cf == '*' && cf[1] == '.') {
589 /* config script interpreter line move top for overwrite previous */
590 cur->next = config->script_i;
591 config->script_i = cur;
595 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
599 config->auth = prev = cur;
601 /* sort path, if current lenght eq or bigger then move up */
602 Htaccess *prev_hti = config->auth;
603 size_t l = strlen(cf);
606 for (hti = prev_hti; hti; hti = hti->next) {
607 if (l >= strlen(hti->before_colon)) {
608 /* insert before hti */
610 if (prev_hti != hti) {
611 prev_hti->next = cur;
619 prev_hti = prev_hti->next;
621 if (!hti) { /* not inserted, add to bottom */
633 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
634 /****************************************************************************
636 > $Function: encodeString()
638 * $Description: Given a string, html encode special characters.
639 * This is used for the -e command line option to provide an easy way
640 * for scripts to encode result data without confusing browsers. The
641 * returned string pointer is memory allocated by malloc().
644 * (const char *) string . . The first string to encode.
646 * $Return: (char *) . . . .. . . A pointer to the encoded string.
648 * $Errors: Returns a null string ("") if memory is not available.
650 ****************************************************************************/
651 static char *encodeString(const char *string)
653 /* take the simple route and encode everything */
654 /* could possibly scan once to get length. */
655 int len = strlen(string);
656 char *out = xmalloc(len * 6 + 1);
660 while ((ch = *string++)) {
661 // very simple check for what to encode
662 if (isalnum(ch)) *p++ = ch;
663 else p += sprintf(p, "&#%d;", (unsigned char) ch);
668 #endif /* FEATURE_HTTPD_ENCODE_URL_STR */
670 /****************************************************************************
672 > $Function: decodeString()
674 * $Description: Given a URL encoded string, convert it to plain ascii.
675 * Since decoding always makes strings smaller, the decode is done in-place.
676 * Thus, callers should strdup() the argument if they do not want the
677 * argument modified. The return is the original pointer, allowing this
678 * function to be easily used as arguments to other functions.
681 * (char *) string . . . The first string to decode.
682 * (int) option_d . . 1 if called for httpd -d
684 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
688 ****************************************************************************/
689 static char *decodeString(char *orig, int option_d)
691 /* note that decoded string is always shorter than original */
696 while ((c = *ptr++) != '\0') {
697 unsigned value1, value2;
699 if (option_d && c == '+') {
707 if (sscanf(ptr, "%1X", &value1) != 1
708 || sscanf(ptr+1, "%1X", &value2) != 1
715 value1 = value1 * 16 + value2;
716 if (!option_d && (value1 == '/' || value1 == '\0')) {
717 /* caller takes it as indication of invalid
718 * (dangerous wrt exploits) chars */
729 #if ENABLE_FEATURE_HTTPD_CGI
730 /****************************************************************************
732 ****************************************************************************/
733 static void setenv1(const char *name, const char *value)
737 setenv(name, value, 1);
739 static void setenv_long(const char *name, long value)
741 char buf[sizeof(value)*3 + 1];
742 sprintf(buf, "%ld", value);
743 setenv(name, buf, 1);
747 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
748 /****************************************************************************
750 > $Function: decodeBase64()
752 > $Description: Decode a base 64 data stream as per rfc1521.
753 * Note that the rfc states that none base64 chars are to be ignored.
754 * Since the decode always results in a shorter size than the input, it is
755 * OK to pass the input arg as an output arg.
758 * (char *) Data . . . . A pointer to a base64 encoded string.
759 * Where to place the decoded data.
765 ****************************************************************************/
766 static void decodeBase64(char *Data)
769 const unsigned char *in = (const unsigned char *)Data;
770 // The decoded size will be at most 3/4 the size of the encoded
771 unsigned long ch = 0;
777 if (t >= '0' && t <= '9')
779 else if (t >= 'A' && t <= 'Z')
781 else if (t >= 'a' && t <= 'z')
795 *Data++ = (char) (ch >> 16);
796 *Data++ = (char) (ch >> 8);
806 /****************************************************************************
808 > $Function: openServer()
810 * $Description: create a listen server socket on the designated port.
812 * $Return: (int) . . . A connection socket. -1 for errors.
816 ****************************************************************************/
817 static int openServer(void)
821 /* create the socket right now */
822 fd = create_and_bind_stream_or_die(NULL, config->port);
827 /****************************************************************************
829 > $Function: sendHeaders()
831 * $Description: Create and send HTTP response headers.
832 * The arguments are combined and sent as one write operation. Note that
833 * IE will puke big-time if the headers are not sent in one packet and the
834 * second packet is delayed for any reason.
837 * (HttpResponseNum) responseNum . . . The result code to send.
839 * $Return: (int) . . . . writing errors
841 ****************************************************************************/
842 static int sendHeaders(HttpResponseNum responseNum)
844 char *buf = config->buf;
845 const char *responseString = "";
846 const char *infoString = 0;
847 const char *mime_type;
849 time_t timer = time(0);
853 numNames = sizeof(httpResponseNames) / sizeof(httpResponseNames[0])
856 for (i = 0; i < numNames; i++) {
857 if (httpResponseNames[i].type == responseNum) {
858 responseString = httpResponseNames[i].name;
859 infoString = httpResponseNames[i].info;
863 /* error message is HTML */
864 mime_type = responseNum == HTTP_OK ?
865 config->found_mime_type : "text/html";
867 /* emit the current date */
868 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
870 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
871 "Date: %s\r\nConnection: close\r\n",
872 responseNum, responseString, mime_type, timeStr);
874 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
875 if (responseNum == HTTP_UNAUTHORIZED) {
876 len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
880 if (responseNum == HTTP_MOVED_TEMPORARILY) {
881 len += sprintf(buf+len, "Location: %s/%s%s\r\n",
882 config->found_moved_temporarily,
883 (config->query ? "?" : ""),
884 (config->query ? config->query : ""));
887 if (config->ContentLength != -1) { /* file */
888 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
889 len += sprintf(buf+len, "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
890 timeStr, "Content-length:", config->ContentLength);
895 len += sprintf(buf+len,
896 "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
897 "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
898 responseNum, responseString,
899 responseNum, responseString, infoString);
902 fprintf(stderr, "headers: '%s'\n", buf);
903 i = config->accepted_socket;
904 if (i == 0) i++; /* write to fd# 1 in inetd mode */
905 return full_write(i, buf, len);
908 /****************************************************************************
910 > $Function: getLine()
912 * $Description: Read from the socket until an end of line char found.
914 * Characters are read one at a time until an eol sequence is found.
916 * $Return: (int) . . . . number of characters read. -1 if error.
918 ****************************************************************************/
919 static int getLine(void)
922 char *buf = config->buf;
924 while (read(config->accepted_socket, buf + count, 1) == 1) {
925 if (buf[count] == '\r') continue;
926 if (buf[count] == '\n') {
930 if (count < (MAX_MEMORY_BUFF-1)) /* check overflow */
933 if (count) return count;
937 #if ENABLE_FEATURE_HTTPD_CGI
938 /****************************************************************************
940 > $Function: sendCgi()
942 * $Description: Execute a CGI script and send it's stdout back
944 * Environment variables are set up and the script is invoked with pipes
945 * for stdin/stdout. If a post is being done the script is fed the POST
946 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
949 * (const char *) url . . . . . . The requested URL (with leading /).
950 * (int bodyLen) . . . . . . . . Length of the post body.
951 * (const char *cookie) . . . . . For set HTTP_COOKIE.
952 * (const char *content_type) . . For set CONTENT_TYPE.
954 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
958 ****************************************************************************/
959 static int sendCgi(const char *url,
960 const char *request, int bodyLen, const char *cookie,
961 const char *content_type)
963 int fromCgi[2]; /* pipe for reading data from CGI */
964 int toCgi[2]; /* pipe for sending data to CGI */
966 static char * argp[] = { 0, 0 };
972 size_t post_read_size, post_read_idx;
974 if (pipe(fromCgi) != 0)
976 if (pipe(toCgi) != 0)
987 char realpath_buff[MAXPATHLEN];
989 if (config->accepted_socket > 1)
990 close(config->accepted_socket);
991 if (config->server_socket > 1)
992 close(config->server_socket);
994 dup2(toCgi[0], 0); // replace stdin with the pipe
995 dup2(fromCgi[1], 1); // replace stdout with the pipe
996 /* Huh? User seeing stderr can be a security problem...
997 * and if CGI really wants that, it can always dup2(1,2)...
999 dup2(fromCgi[1], 2); // replace stderr with the pipe
1001 /* I think we cannot inadvertently close 0, 1 here... */
1010 xfunc_error_retval = 242;
1011 purl = xstrdup(url);
1013 while ((script = strchr(script + 1, '/')) != NULL) {
1014 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1018 if (is_directory(purl + 1, 1, &sb) == 0) {
1019 /* not directory, found script.cgi/PATH_INFO */
1023 *script = '/'; /* is directory, find next '/' */
1025 setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
1026 /* setenv1("PATH", getenv("PATH")); redundant */
1027 setenv1("REQUEST_METHOD", request);
1028 if (config->query) {
1029 char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1031 sprintf(uri, "%s?%s", purl, config->query);
1032 setenv1("REQUEST_URI", uri);
1034 setenv1("REQUEST_URI", purl);
1037 *script = '\0'; /* cut off /PATH_INFO */
1038 /* SCRIPT_FILENAME required by PHP in CGI mode */
1039 if (!realpath(purl + 1, realpath_buff))
1040 goto error_execing_cgi;
1041 setenv1("SCRIPT_FILENAME", realpath_buff);
1042 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1043 setenv1("SCRIPT_NAME", purl);
1044 /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
1045 * QUERY_STRING: The information which follows the ? in the URL
1046 * which referenced this script. This is the query information.
1047 * It should not be decoded in any fashion. This variable
1048 * should always be set when there is query information,
1049 * regardless of command line decoding. */
1050 /* (Older versions of bbox seem to do some decoding) */
1051 setenv1("QUERY_STRING", config->query);
1052 setenv1("SERVER_SOFTWARE", httpdVersion);
1053 putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
1054 putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
1055 /* Having _separate_ variables for IP and port defeats
1056 * the purpose of having socket abstraction. Which "port"
1057 * are you using on Unix domain socket?
1058 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
1061 char *p = config->rmt_ip_str ? : (char*)"";
1062 char *cp = strrchr(p, ':');
1063 if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
1065 if (cp) *cp = '\0'; /* delete :PORT */
1066 setenv1("REMOTE_ADDR", p);
1068 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1069 setenv_long("REMOTE_PORT", config->port);
1072 setenv_long("CONTENT_LENGTH", bodyLen);
1074 setenv1("HTTP_COOKIE", cookie);
1076 setenv1("CONTENT_TYPE", content_type);
1077 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1078 if (config->remoteuser) {
1079 setenv1("REMOTE_USER", config->remoteuser);
1080 putenv((char*)"AUTH_TYPE=Basic");
1083 if (config->referer)
1084 setenv1("HTTP_REFERER", config->referer);
1086 /* set execve argp[0] without path */
1087 argp[0] = strrchr(purl, '/') + 1;
1088 /* but script argp[0] must have absolute path and chdiring to this */
1089 script = strrchr(realpath_buff, '/');
1091 goto error_execing_cgi;
1093 if (chdir(realpath_buff) == 0) {
1094 // Now run the program. If it fails,
1095 // use _exit() so no destructors
1096 // get called and make a mess.
1097 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1098 char *interpr = NULL;
1099 char *suffix = strrchr(purl, '.');
1103 for (cur = config->script_i; cur; cur = cur->next) {
1104 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1105 interpr = cur->after_colon;
1112 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1114 execv(interpr, argp);
1117 execv(realpath_buff, argp);
1120 /* send to stdout (even if we are not from inetd) */
1121 config->accepted_socket = 1;
1122 sendHeaders(HTTP_NOT_FOUND);
1126 /* parent process */
1130 post_read_idx = 0; /* for gcc */
1135 signal(SIGPIPE, SIG_IGN);
1146 FD_SET(inFd, &readSet);
1147 if (bodyLen > 0 || post_read_size > 0) {
1148 FD_SET(outFd, &writeSet);
1149 nfound = outFd > inFd ? outFd : inFd;
1150 if (post_read_size == 0) {
1151 FD_SET(config->accepted_socket, &readSet);
1152 if (nfound < config->accepted_socket)
1153 nfound = config->accepted_socket;
1155 /* Now wait on the set of sockets! */
1156 nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL);
1159 close(outFd); /* no more POST data to CGI */
1162 nfound = select(inFd + 1, &readSet, NULL, NULL, NULL);
1166 if (waitpid(pid, &status, WNOHANG) <= 0) {
1167 /* Weird. CGI didn't exit and no fd's
1168 * are ready, yet select returned?! */
1172 if (DEBUG && WIFEXITED(status))
1173 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1174 if (DEBUG && WIFSIGNALED(status))
1175 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1179 if (post_read_size > 0 && FD_ISSET(outFd, &writeSet)) {
1180 /* Have data from peer and can write to CGI */
1181 // huh? why full_write? what if we will block?
1182 // (imagine that CGI does not read its stdin...)
1183 count = full_write(outFd, wbuf + post_read_idx, post_read_size);
1185 post_read_idx += count;
1186 post_read_size -= count;
1188 post_read_size = bodyLen = 0; /* broken pipe to CGI */
1190 } else if (bodyLen > 0 && post_read_size == 0
1191 && FD_ISSET(config->accepted_socket, &readSet)
1193 /* We expect data, prev data portion is eaten by CGI
1194 * and there *is* data to read from the peer
1196 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1197 count = safe_read(config->accepted_socket, wbuf, count);
1199 post_read_size = count;
1203 bodyLen = 0; /* closed */
1207 #define PIPESIZE PIPE_BUF
1208 #if PIPESIZE >= MAX_MEMORY_BUFF
1209 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1211 if (FD_ISSET(inFd, &readSet)) {
1212 /* There is something to read from CGI */
1213 int s = config->accepted_socket;
1214 char *rbuf = config->buf;
1216 /* Are we still buffering CGI output? */
1217 if (buf_count >= 0) {
1218 static const char HTTP_200[] = "HTTP/1.0 200 OK\r\n\r\n";
1219 /* Must use safe_read, not full_read, because
1220 * CGI may output a few first bytes and then wait
1221 * for POSTDATA without closing stdout.
1222 * With full_read we may wait here forever. */
1223 count = safe_read(inFd, rbuf + buf_count, PIPESIZE - 4);
1225 /* eof (or error) and there was no "HTTP",
1226 * so add one and write out the received data */
1228 full_write(s, HTTP_200, sizeof(HTTP_200)-1);
1229 full_write(s, rbuf, buf_count);
1235 if (buf_count >= 4) {
1236 /* check to see if CGI added "HTTP" */
1237 if (memcmp(rbuf, HTTP_200, 4) != 0) {
1238 /* there is no "HTTP", do it ourself */
1239 if (full_write(s, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
1242 /* example of valid CGI without "Content-type:"
1243 * echo -en "HTTP/1.0 302 Found\r\n"
1244 * echo -en "Location: http://www.busybox.net\r\n"
1246 if (!strstr(rbuf, "ontent-")) {
1247 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1251 buf_count = -1; /* buffering off */
1254 count = safe_read(inFd, rbuf, PIPESIZE);
1256 break; /* eof (or error) */
1258 if (full_write(s, rbuf, count) != count)
1261 fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
1262 } /* if (FD_ISSET(inFd)) */
1266 #endif /* FEATURE_HTTPD_CGI */
1268 /****************************************************************************
1270 > $Function: sendFile()
1272 * $Description: Send a file response to a HTTP request
1275 * (const char *) url . . The URL requested.
1277 * $Return: (int) . . . . . . Always 0.
1279 ****************************************************************************/
1280 static int sendFile(const char *url)
1284 const char * const * table;
1285 const char * try_suffix;
1287 suffix = strrchr(url, '.');
1289 for (table = suffixTable; *table; table += 2)
1290 if (suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1291 try_suffix += strlen(suffix);
1292 if (*try_suffix == 0 || *try_suffix == '.')
1295 /* also, if not found, set default as "application/octet-stream"; */
1296 config->found_mime_type = table[1];
1297 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1301 for (cur = config->mime_a; cur; cur = cur->next) {
1302 if (strcmp(cur->before_colon, suffix) == 0) {
1303 config->found_mime_type = cur->after_colon;
1308 #endif /* FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1311 fprintf(stderr, "sending file '%s' content-type: %s\n",
1312 url, config->found_mime_type);
1314 f = open(url, O_RDONLY);
1317 char *buf = config->buf;
1319 sendHeaders(HTTP_OK);
1320 /* TODO: sendfile() */
1321 while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1322 int fd = config->accepted_socket;
1323 if (fd == 0) fd++; /* write to fd# 1 in inetd mode */
1324 if (full_write(fd, buf, count) != count)
1330 bb_perror_msg("cannot open '%s'", url);
1331 sendHeaders(HTTP_NOT_FOUND);
1337 static int checkPermIP(void)
1341 /* This could stand some work */
1342 for (cur = config->ip_a_d; cur; cur = cur->next) {
1343 #if ENABLE_FEATURE_HTTPD_CGI && DEBUG
1344 fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1347 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1348 (unsigned char)(cur->ip >> 24),
1349 (unsigned char)(cur->ip >> 16),
1350 (unsigned char)(cur->ip >> 8),
1351 (unsigned char)(cur->ip),
1352 (unsigned char)(cur->mask >> 24),
1353 (unsigned char)(cur->mask >> 16),
1354 (unsigned char)(cur->mask >> 8),
1355 (unsigned char)(cur->mask)
1358 if ((config->rmt_ip & cur->mask) == cur->ip)
1359 return cur->allow_deny == 'A'; /* Allow/Deny */
1362 /* if unconfigured, return 1 - access from all */
1363 return !config->flg_deny_all;
1366 /****************************************************************************
1368 > $Function: checkPerm()
1370 * $Description: Check the permission file for access password protected.
1372 * If config file isn't present, everything is allowed.
1373 * Entries are of the form you can see example from header source
1376 * (const char *) path . . . . The file path.
1377 * (const char *) request . . . User information to validate.
1379 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1381 ****************************************************************************/
1383 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1384 static int checkPerm(const char *path, const char *request)
1390 const char *prev = NULL;
1392 /* This could stand some work */
1393 for (cur = config->auth; cur; cur = cur->next) {
1396 p0 = cur->before_colon;
1397 if (prev != NULL && strcmp(prev, p0) != 0)
1398 continue; /* find next identical */
1399 p = cur->after_colon;
1401 fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
1404 if (strncmp(p0, path, l) == 0
1405 && (l == 1 || path[l] == '/' || path[l] == '\0')
1408 /* path match found. Check request */
1409 /* for check next /path:user:password */
1411 u = strchr(request, ':');
1413 /* bad request, ':' required */
1417 if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
1421 if (strncmp(p, request, u-request) != 0) {
1422 /* user uncompared */
1425 pp = strchr(p, ':');
1426 if (pp && pp[1] == '$' && pp[2] == '1' &&
1427 pp[3] == '$' && pp[4]) {
1429 cipher = pw_encrypt(u+1, pp);
1430 if (strcmp(cipher, pp) == 0)
1431 goto set_remoteuser_var; /* Ok */
1437 if (strcmp(p, request) == 0) {
1439 config->remoteuser = strdup(request);
1440 if (config->remoteuser)
1441 config->remoteuser[(u - request)] = 0;
1448 return prev == NULL;
1451 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1453 /****************************************************************************
1455 > $Function: handle_sigalrm()
1457 * $Description: Handle timeouts
1459 ****************************************************************************/
1461 static void handle_sigalrm(int sig)
1463 sendHeaders(HTTP_REQUEST_TIMEOUT);
1464 config->alarm_signaled = sig;
1467 /****************************************************************************
1469 > $Function: handleIncoming()
1471 * $Description: Handle an incoming http request.
1473 ****************************************************************************/
1474 static void handleIncoming(void)
1476 char *buf = config->buf;
1483 #if ENABLE_FEATURE_HTTPD_CGI
1484 const char *prequest = request_GET;
1485 unsigned long length = 0;
1487 char *content_type = 0;
1492 struct sigaction sa;
1494 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1495 int credentials = -1; /* if not required this is Ok */
1498 sa.sa_handler = handle_sigalrm;
1499 sigemptyset(&sa.sa_mask);
1500 sa.sa_flags = 0; /* no SA_RESTART */
1501 sigaction(SIGALRM, &sa, NULL);
1506 (void) alarm(TIMEOUT);
1510 purl = strpbrk(buf, " \t");
1513 sendHeaders(HTTP_BAD_REQUEST);
1517 #if ENABLE_FEATURE_HTTPD_CGI
1518 if (strcasecmp(buf, prequest) != 0) {
1520 if (strcasecmp(buf, prequest) != 0) {
1521 sendHeaders(HTTP_NOT_IMPLEMENTED);
1526 if (strcasecmp(buf, request_GET) != 0) {
1527 sendHeaders(HTTP_NOT_IMPLEMENTED);
1532 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1534 if (count < 1 || buf[0] != '/') {
1535 /* Garbled request/URL */
1538 url = alloca(strlen(buf) + sizeof("/index.html"));
1540 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1544 /* extract url args if present */
1545 test = strchr(url, '?');
1546 config->query = NULL;
1549 config->query = test;
1552 test = decodeString(url, 0);
1555 if (test == url+1) {
1556 /* '/' or NUL is encoded */
1557 sendHeaders(HTTP_NOT_FOUND);
1561 /* algorithm stolen from libbb bb_simplify_path(),
1562 but don't strdup and reducing trailing slash and protect out root */
1566 /* skip duplicate (or initial) slash */
1571 /* skip extra '.' */
1572 if (test[1] == '/' || test[1] == 0) {
1575 /* '..': be careful */
1576 if (test[1] == '.' && (test[2] == '/' || test[2] == 0)) {
1579 /* protect out root */
1582 while (*--purl != '/') /* omit previous dir */;
1589 *++purl = '\0'; /* so keep last character */
1590 test = purl; /* end ptr */
1592 /* If URL is directory, adding '/' */
1593 if (test[-1] != '/') {
1594 if (is_directory(url + 1, 1, &sb)) {
1595 config->found_moved_temporarily = url;
1599 fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1602 ip_allowed = checkPermIP();
1603 while (ip_allowed && (test = strchr(test + 1, '/')) != NULL) {
1604 /* have path1/path2 */
1606 if (is_directory(url + 1, 1, &sb)) {
1607 /* may be having subdir config */
1608 parse_conf(url + 1, SUBDIR_PARSE);
1609 ip_allowed = checkPermIP();
1614 /* read until blank line for HTTP version specified, else parse immediate */
1622 fprintf(stderr, "header: '%s'\n", buf);
1624 #if ENABLE_FEATURE_HTTPD_CGI
1625 /* try and do our best to parse more lines */
1626 if ((STRNCASECMP(buf, "Content-length:") == 0)) {
1627 /* extra read only for POST */
1628 if (prequest != request_GET) {
1629 test = buf + sizeof("Content-length:")-1;
1633 /* not using strtoul: it ignores leading munis! */
1634 length = strtol(test, &test, 10);
1635 /* length is "ulong", but we need to pass it to int later */
1636 /* so we check for negative or too large values in one go: */
1637 /* (long -> ulong conv caused negatives to be seen as > INT_MAX) */
1638 if (test[0] || errno || length > INT_MAX)
1641 } else if ((STRNCASECMP(buf, "Cookie:") == 0)) {
1642 cookie = strdup(skip_whitespace(buf + sizeof("Cookie:")-1));
1643 } else if ((STRNCASECMP(buf, "Content-Type:") == 0)) {
1644 content_type = strdup(skip_whitespace(buf + sizeof("Content-Type:")-1));
1645 } else if ((STRNCASECMP(buf, "Referer:") == 0)) {
1646 config->referer = strdup(skip_whitespace(buf + sizeof("Referer:")-1));
1650 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1651 if (STRNCASECMP(buf, "Authorization:") == 0) {
1652 /* We only allow Basic credentials.
1653 * It shows up as "Authorization: Basic <userid:password>" where
1654 * the userid:password is base64 encoded.
1656 test = skip_whitespace(buf + sizeof("Authorization:")-1);
1657 if (STRNCASECMP(test, "Basic") != 0)
1659 test += sizeof("Basic")-1;
1660 /* decodeBase64() skips whitespace itself */
1662 credentials = checkPerm(url, test);
1664 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1666 } /* while extra header reading */
1669 if (config->alarm_signaled)
1672 if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1673 /* protect listing [/path]/httpd_conf or IP deny */
1674 #if ENABLE_FEATURE_HTTPD_CGI
1675 FORBIDDEN: /* protect listing /cgi-bin */
1677 sendHeaders(HTTP_FORBIDDEN);
1681 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1682 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1683 sendHeaders(HTTP_UNAUTHORIZED);
1688 if (config->found_moved_temporarily) {
1689 sendHeaders(HTTP_MOVED_TEMPORARILY);
1690 /* clear unforked memory flag */
1691 config->found_moved_temporarily = NULL;
1695 test = url + 1; /* skip first '/' */
1697 #if ENABLE_FEATURE_HTTPD_CGI
1698 if (strncmp(test, "cgi-bin", 7) == 0) {
1699 if (test[7] == '/' && test[8] == 0)
1700 goto FORBIDDEN; /* protect listing cgi-bin/ */
1701 sendCgi(url, prequest, length, cookie, content_type);
1704 if (prequest != request_GET) {
1705 sendHeaders(HTTP_NOT_IMPLEMENTED);
1708 #endif /* FEATURE_HTTPD_CGI */
1709 if (purl[-1] == '/')
1710 strcpy(purl, "index.html");
1711 if (stat(test, &sb) == 0) {
1712 /* It's a dir URL and there is index.html */
1713 config->ContentLength = sb.st_size;
1714 config->last_mod = sb.st_mtime;
1716 #if ENABLE_FEATURE_HTTPD_CGI
1717 else if (purl[-1] == '/') {
1718 /* It's a dir URL and there is no index.html
1719 * Try cgi-bin/index.cgi */
1720 if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
1722 config->query = url;
1723 sendCgi("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
1727 #endif /* FEATURE_HTTPD_CGI */
1729 config->ContentLength = -1;
1732 #if ENABLE_FEATURE_HTTPD_CGI
1737 fprintf(stderr, "closing socket\n\n");
1738 #if ENABLE_FEATURE_HTTPD_CGI
1741 free(config->referer);
1742 config->referer = NULL;
1743 # if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1744 free(config->remoteuser);
1745 config->remoteuser = NULL;
1748 shutdown(config->accepted_socket, SHUT_WR);
1750 /* Properly wait for remote to closed */
1752 FD_SET(config->accepted_socket, &s_fd);
1757 retval = select(config->accepted_socket + 1, &s_fd, NULL, NULL, &tv);
1758 } while (retval > 0 && read(config->accepted_socket, buf, sizeof(config->buf) > 0));
1760 shutdown(config->accepted_socket, SHUT_RD);
1761 /* In inetd case, we close fd 1 (stdout) here. We will exit soon anyway */
1762 close(config->accepted_socket);
1765 /****************************************************************************
1767 > $Function: miniHttpd()
1769 * $Description: The main http server function.
1771 * Given an open socket fildes, listen for new connections and farm out
1772 * the processing as a forked process.
1775 * (int) server. . . The server socket fildes.
1777 * $Return: (int) . . . . Always 0.
1779 ****************************************************************************/
1780 static int miniHttpd(int server)
1782 fd_set readfd, portfd;
1785 FD_SET(server, &portfd);
1787 /* copy the ports we are watching to the readfd set */
1792 struct sockaddr_in sin;
1793 USE_FEATURE_IPV6(struct sockaddr_in6 sin6;)
1795 socklen_t fromAddrLen = sizeof(fromAddr);
1797 /* Now wait INDEFINITELY on the set of sockets! */
1799 if (select(server + 1, &readfd, 0, 0, 0) <= 0)
1801 if (!FD_ISSET(server, &readfd))
1803 s = accept(server, &fromAddr.sa, &fromAddrLen);
1806 config->accepted_socket = s;
1809 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1810 free(config->rmt_ip_str);
1811 config->rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen);
1813 bb_error_msg("connection from '%s'", config->rmt_ip_str);
1815 #endif /* FEATURE_HTTPD_CGI */
1816 if (fromAddr.sa.sa_family == AF_INET) {
1817 config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1818 config->port = ntohs(fromAddr.sin.sin_port);
1820 #if ENABLE_FEATURE_IPV6
1821 if (fromAddr.sa.sa_family == AF_INET6) {
1822 //config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1823 config->port = ntohs(fromAddr.sin6.sin6_port);
1827 /* set the KEEPALIVE option to cull dead connections */
1828 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
1830 if (DEBUG || fork() == 0) {
1832 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1833 /* protect reload config, may be confuse checking */
1834 signal(SIGHUP, SIG_IGN);
1846 static int miniHttpd_inetd(void)
1850 struct sockaddr_in sin;
1851 USE_FEATURE_IPV6(struct sockaddr_in6 sin6;)
1853 socklen_t fromAddrLen = sizeof(fromAddr);
1855 getpeername(0, &fromAddr.sa, &fromAddrLen);
1858 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1859 free(config->rmt_ip_str);
1860 config->rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen);
1862 if (fromAddr.sa.sa_family == AF_INET) {
1863 config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1864 config->port = ntohs(fromAddr.sin.sin_port);
1866 #if ENABLE_FEATURE_IPV6
1867 if (fromAddr.sa.sa_family == AF_INET6) {
1868 //config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1869 config->port = ntohs(fromAddr.sin6.sin6_port);
1876 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1877 static void sighup_handler(int sig)
1880 struct sigaction sa;
1882 parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1883 sa.sa_handler = sighup_handler;
1884 sigemptyset(&sa.sa_mask);
1885 sa.sa_flags = SA_RESTART;
1886 sigaction(SIGHUP, &sa, NULL);
1891 c_opt_config_file = 0,
1894 USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
1895 USE_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
1896 USE_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
1897 USE_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
1901 OPT_CONFIG_FILE = 1 << c_opt_config_file,
1902 OPT_DECODE_URL = 1 << d_opt_decode_url,
1903 OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
1904 OPT_ENCODE_URL = USE_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
1905 OPT_REALM = USE_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
1906 OPT_MD5 = USE_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
1907 OPT_SETUID = USE_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
1908 OPT_PORT = 1 << p_opt_port,
1909 OPT_INETD = 1 << p_opt_inetd,
1910 OPT_FOREGROUND = 1 << p_opt_foreground,
1913 static const char httpd_opts[] = "c:d:h:"
1914 USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
1915 USE_FEATURE_HTTPD_BASIC_AUTH("r:")
1916 USE_FEATURE_HTTPD_AUTH_MD5("m:")
1917 USE_FEATURE_HTTPD_SETUID("u:")
1921 int httpd_main(int argc, char *argv[]);
1922 int httpd_main(int argc, char *argv[])
1925 const char *home_httpd = home;
1926 char *url_for_decode;
1927 USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
1929 USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
1930 USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
1931 USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
1933 #if ENABLE_LOCALE_SUPPORT
1934 /* Undo busybox.c: we want to speak English in http (dates etc) */
1935 setlocale(LC_TIME, "C");
1938 config = xzalloc(sizeof(*config));
1939 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1940 config->realm = "Web Server Authentication";
1943 config->ContentLength = -1;
1945 opt = getopt32(argc, argv, httpd_opts,
1946 &(config->configFile), &url_for_decode, &home_httpd
1947 USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
1948 USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm))
1949 USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
1950 USE_FEATURE_HTTPD_SETUID(, &s_ugid)
1953 if (opt & OPT_DECODE_URL) {
1954 printf("%s", decodeString(url_for_decode, 1));
1957 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
1958 if (opt & OPT_ENCODE_URL) {
1959 printf("%s", encodeString(url_for_encode));
1963 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
1964 if (opt & OPT_MD5) {
1965 puts(pw_encrypt(pass, "$1$"));
1970 config->port = xatou16(s_port);
1972 #if ENABLE_FEATURE_HTTPD_SETUID
1973 if (opt & OPT_SETUID) {
1974 if (!get_uidgid(&ugid, s_ugid, 1))
1975 bb_error_msg_and_die("unrecognized user[:group] "
1976 "name '%s'", s_ugid);
1981 if (!(opt & OPT_INETD)) {
1982 signal(SIGCHLD, SIG_IGN);
1983 config->server_socket = openServer();
1984 #if ENABLE_FEATURE_HTTPD_SETUID
1985 /* drop privileges */
1986 if (opt & OPT_SETUID) {
1987 if (ugid.gid != (gid_t)-1) {
1988 if (setgroups(1, &ugid.gid) == -1)
1989 bb_perror_msg_and_die("setgroups");
1997 #if ENABLE_FEATURE_HTTPD_CGI
1999 char *p = getenv("PATH");
2000 p = xstrdup(p); /* if gets NULL, returns NULL */
2004 if (!(opt & OPT_INETD))
2005 setenv_long("SERVER_PORT", config->port);
2009 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2012 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2015 if (opt & OPT_INETD)
2016 return miniHttpd_inetd();
2018 if (!(opt & OPT_FOREGROUND))
2019 xdaemon(1, 0); /* don't change current directory */
2020 return miniHttpd(config->server_socket);