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)
768 const unsigned char *in = (const unsigned char *)Data;
769 // The decoded size will be at most 3/4 the size of the encoded
776 if (t >= '0' && t <= '9')
778 else if (t >= 'A' && t <= 'Z')
780 else if (t >= 'a' && t <= 'z')
794 *Data++ = (char) (ch >> 16);
795 *Data++ = (char) (ch >> 8);
805 /****************************************************************************
807 > $Function: openServer()
809 * $Description: create a listen server socket on the designated port.
811 * $Return: (int) . . . A connection socket. -1 for errors.
815 ****************************************************************************/
816 static int openServer(void)
820 /* create the socket right now */
821 fd = create_and_bind_stream_or_die(NULL, config->port);
826 /****************************************************************************
828 > $Function: sendHeaders()
830 * $Description: Create and send HTTP response headers.
831 * The arguments are combined and sent as one write operation. Note that
832 * IE will puke big-time if the headers are not sent in one packet and the
833 * second packet is delayed for any reason.
836 * (HttpResponseNum) responseNum . . . The result code to send.
838 * $Return: (int) . . . . writing errors
840 ****************************************************************************/
841 static int sendHeaders(HttpResponseNum responseNum)
843 char *buf = config->buf;
844 const char *responseString = "";
845 const char *infoString = 0;
846 const char *mime_type;
848 time_t timer = time(0);
852 numNames = sizeof(httpResponseNames) / sizeof(httpResponseNames[0])
855 for (i = 0; i < numNames; i++) {
856 if (httpResponseNames[i].type == responseNum) {
857 responseString = httpResponseNames[i].name;
858 infoString = httpResponseNames[i].info;
862 /* error message is HTML */
863 mime_type = responseNum == HTTP_OK ?
864 config->found_mime_type : "text/html";
866 /* emit the current date */
867 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
869 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
870 "Date: %s\r\nConnection: close\r\n",
871 responseNum, responseString, mime_type, timeStr);
873 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
874 if (responseNum == HTTP_UNAUTHORIZED) {
875 len += sprintf(buf+len,
876 "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)
980 * Note: We can use vfork() here in the no-mmu case, although
981 * the child modifies the parent's variables, due to:
982 * 1) The parent does not use the child-modified variables.
983 * 2) The allocated memory (in the child) is freed when the process
984 * exits. This happens instantly after the child finishes,
985 * since httpd is run from inetd (and it can't run standalone
1000 char realpath_buff[MAXPATHLEN];
1002 if (config->accepted_socket > 1)
1003 close(config->accepted_socket);
1004 if (config->server_socket > 1)
1005 close(config->server_socket);
1007 dup2(toCgi[0], 0); // replace stdin with the pipe
1008 dup2(fromCgi[1], 1); // replace stdout with the pipe
1009 /* Huh? User seeing stderr can be a security problem...
1010 * and if CGI really wants that, it can always dup2(1,2)...
1012 dup2(fromCgi[1], 2); // replace stderr with the pipe
1014 /* I think we cannot inadvertently close 0, 1 here... */
1023 xfunc_error_retval = 242;
1024 purl = xstrdup(url);
1026 while ((script = strchr(script + 1, '/')) != NULL) {
1027 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1031 if (is_directory(purl + 1, 1, &sb) == 0) {
1032 /* not directory, found script.cgi/PATH_INFO */
1036 *script = '/'; /* is directory, find next '/' */
1038 setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
1039 /* setenv1("PATH", getenv("PATH")); redundant */
1040 setenv1("REQUEST_METHOD", request);
1041 if (config->query) {
1042 char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1044 sprintf(uri, "%s?%s", purl, config->query);
1045 setenv1("REQUEST_URI", uri);
1047 setenv1("REQUEST_URI", purl);
1050 *script = '\0'; /* cut off /PATH_INFO */
1051 /* SCRIPT_FILENAME required by PHP in CGI mode */
1052 if (!realpath(purl + 1, realpath_buff))
1053 goto error_execing_cgi;
1054 setenv1("SCRIPT_FILENAME", realpath_buff);
1055 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1056 setenv1("SCRIPT_NAME", purl);
1057 /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
1058 * QUERY_STRING: The information which follows the ? in the URL
1059 * which referenced this script. This is the query information.
1060 * It should not be decoded in any fashion. This variable
1061 * should always be set when there is query information,
1062 * regardless of command line decoding. */
1063 /* (Older versions of bbox seem to do some decoding) */
1064 setenv1("QUERY_STRING", config->query);
1065 setenv1("SERVER_SOFTWARE", httpdVersion);
1066 putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
1067 putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
1068 /* Having _separate_ variables for IP and port defeats
1069 * the purpose of having socket abstraction. Which "port"
1070 * are you using on Unix domain socket?
1071 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
1074 char *p = config->rmt_ip_str ? : (char*)"";
1075 char *cp = strrchr(p, ':');
1076 if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
1078 if (cp) *cp = '\0'; /* delete :PORT */
1079 setenv1("REMOTE_ADDR", p);
1081 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1082 setenv_long("REMOTE_PORT", config->port);
1085 setenv_long("CONTENT_LENGTH", bodyLen);
1087 setenv1("HTTP_COOKIE", cookie);
1089 setenv1("CONTENT_TYPE", content_type);
1090 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1091 if (config->remoteuser) {
1092 setenv1("REMOTE_USER", config->remoteuser);
1093 putenv((char*)"AUTH_TYPE=Basic");
1096 if (config->referer)
1097 setenv1("HTTP_REFERER", config->referer);
1099 /* set execve argp[0] without path */
1100 argp[0] = strrchr(purl, '/') + 1;
1101 /* but script argp[0] must have absolute path and chdiring to this */
1102 script = strrchr(realpath_buff, '/');
1104 goto error_execing_cgi;
1106 if (chdir(realpath_buff) == 0) {
1107 // Now run the program. If it fails,
1108 // use _exit() so no destructors
1109 // get called and make a mess.
1110 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1111 char *interpr = NULL;
1112 char *suffix = strrchr(purl, '.');
1116 for (cur = config->script_i; cur; cur = cur->next) {
1117 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1118 interpr = cur->after_colon;
1125 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1127 execv(interpr, argp);
1130 execv(realpath_buff, argp);
1133 /* send to stdout (even if we are not from inetd) */
1134 config->accepted_socket = 1;
1135 sendHeaders(HTTP_NOT_FOUND);
1139 /* parent process */
1143 post_read_idx = 0; /* for gcc */
1148 signal(SIGPIPE, SIG_IGN);
1159 FD_SET(inFd, &readSet);
1160 if (bodyLen > 0 || post_read_size > 0) {
1161 FD_SET(outFd, &writeSet);
1162 nfound = outFd > inFd ? outFd : inFd;
1163 if (post_read_size == 0) {
1164 FD_SET(config->accepted_socket, &readSet);
1165 if (nfound < config->accepted_socket)
1166 nfound = config->accepted_socket;
1168 /* Now wait on the set of sockets! */
1169 nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL);
1172 close(outFd); /* no more POST data to CGI */
1175 nfound = select(inFd + 1, &readSet, NULL, NULL, NULL);
1179 if (waitpid(pid, &status, WNOHANG) <= 0) {
1180 /* Weird. CGI didn't exit and no fd's
1181 * are ready, yet select returned?! */
1185 if (DEBUG && WIFEXITED(status))
1186 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1187 if (DEBUG && WIFSIGNALED(status))
1188 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1192 if (post_read_size > 0 && FD_ISSET(outFd, &writeSet)) {
1193 /* Have data from peer and can write to CGI */
1194 // huh? why full_write? what if we will block?
1195 // (imagine that CGI does not read its stdin...)
1196 count = full_write(outFd, wbuf + post_read_idx, post_read_size);
1198 post_read_idx += count;
1199 post_read_size -= count;
1201 post_read_size = bodyLen = 0; /* broken pipe to CGI */
1203 } else if (bodyLen > 0 && post_read_size == 0
1204 && FD_ISSET(config->accepted_socket, &readSet)
1206 /* We expect data, prev data portion is eaten by CGI
1207 * and there *is* data to read from the peer
1209 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1210 count = safe_read(config->accepted_socket, wbuf, count);
1212 post_read_size = count;
1216 bodyLen = 0; /* closed */
1220 #define PIPESIZE PIPE_BUF
1221 #if PIPESIZE >= MAX_MEMORY_BUFF
1222 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1224 if (FD_ISSET(inFd, &readSet)) {
1225 /* There is something to read from CGI */
1226 int s = config->accepted_socket;
1227 char *rbuf = config->buf;
1229 /* Are we still buffering CGI output? */
1230 if (buf_count >= 0) {
1231 static const char HTTP_200[] = "HTTP/1.0 200 OK\r\n";
1232 /* Must use safe_read, not full_read, because
1233 * CGI may output a few first bytes and then wait
1234 * for POSTDATA without closing stdout.
1235 * With full_read we may wait here forever. */
1236 count = safe_read(inFd, rbuf + buf_count, PIPESIZE - 4);
1238 /* eof (or error) and there was no "HTTP",
1239 * so add one and write out the received data */
1241 full_write(s, HTTP_200, sizeof(HTTP_200)-1);
1242 full_write(s, rbuf, buf_count);
1248 if (buf_count >= 4) {
1249 /* check to see if CGI added "HTTP" */
1250 if (memcmp(rbuf, HTTP_200, 4) != 0) {
1251 /* there is no "HTTP", do it ourself */
1252 if (full_write(s, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
1255 /* example of valid CGI without "Content-type:"
1256 * echo -en "HTTP/1.0 302 Found\r\n"
1257 * echo -en "Location: http://www.busybox.net\r\n"
1259 if (!strstr(rbuf, "ontent-")) {
1260 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1264 buf_count = -1; /* buffering off */
1267 count = safe_read(inFd, rbuf, PIPESIZE);
1269 break; /* eof (or error) */
1271 if (full_write(s, rbuf, count) != count)
1274 fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
1275 } /* if (FD_ISSET(inFd)) */
1279 #endif /* FEATURE_HTTPD_CGI */
1281 /****************************************************************************
1283 > $Function: sendFile()
1285 * $Description: Send a file response to a HTTP request
1288 * (const char *) url . . The URL requested.
1290 * $Return: (int) . . . . . . Always 0.
1292 ****************************************************************************/
1293 static int sendFile(const char *url)
1297 const char * const * table;
1298 const char * try_suffix;
1300 suffix = strrchr(url, '.');
1302 for (table = suffixTable; *table; table += 2)
1303 if (suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1304 try_suffix += strlen(suffix);
1305 if (*try_suffix == 0 || *try_suffix == '.')
1308 /* also, if not found, set default as "application/octet-stream"; */
1309 config->found_mime_type = table[1];
1310 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1314 for (cur = config->mime_a; cur; cur = cur->next) {
1315 if (strcmp(cur->before_colon, suffix) == 0) {
1316 config->found_mime_type = cur->after_colon;
1321 #endif /* FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1324 fprintf(stderr, "sending file '%s' content-type: %s\n",
1325 url, config->found_mime_type);
1327 f = open(url, O_RDONLY);
1330 char *buf = config->buf;
1332 sendHeaders(HTTP_OK);
1333 /* TODO: sendfile() */
1334 while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1335 int fd = config->accepted_socket;
1336 if (fd == 0) fd++; /* write to fd# 1 in inetd mode */
1337 if (full_write(fd, buf, count) != count)
1343 bb_perror_msg("cannot open '%s'", url);
1344 sendHeaders(HTTP_NOT_FOUND);
1350 static int checkPermIP(void)
1354 /* This could stand some work */
1355 for (cur = config->ip_a_d; cur; cur = cur->next) {
1356 #if ENABLE_FEATURE_HTTPD_CGI && DEBUG
1357 fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1360 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1361 (unsigned char)(cur->ip >> 24),
1362 (unsigned char)(cur->ip >> 16),
1363 (unsigned char)(cur->ip >> 8),
1364 (unsigned char)(cur->ip),
1365 (unsigned char)(cur->mask >> 24),
1366 (unsigned char)(cur->mask >> 16),
1367 (unsigned char)(cur->mask >> 8),
1368 (unsigned char)(cur->mask)
1371 if ((config->rmt_ip & cur->mask) == cur->ip)
1372 return cur->allow_deny == 'A'; /* Allow/Deny */
1375 /* if unconfigured, return 1 - access from all */
1376 return !config->flg_deny_all;
1379 /****************************************************************************
1381 > $Function: checkPerm()
1383 * $Description: Check the permission file for access password protected.
1385 * If config file isn't present, everything is allowed.
1386 * Entries are of the form you can see example from header source
1389 * (const char *) path . . . . The file path.
1390 * (const char *) request . . . User information to validate.
1392 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1394 ****************************************************************************/
1396 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1397 static int checkPerm(const char *path, const char *request)
1403 const char *prev = NULL;
1405 /* This could stand some work */
1406 for (cur = config->auth; cur; cur = cur->next) {
1409 p0 = cur->before_colon;
1410 if (prev != NULL && strcmp(prev, p0) != 0)
1411 continue; /* find next identical */
1412 p = cur->after_colon;
1414 fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
1417 if (strncmp(p0, path, l) == 0
1418 && (l == 1 || path[l] == '/' || path[l] == '\0')
1421 /* path match found. Check request */
1422 /* for check next /path:user:password */
1424 u = strchr(request, ':');
1426 /* bad request, ':' required */
1430 if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
1434 if (strncmp(p, request, u-request) != 0) {
1435 /* user uncompared */
1438 pp = strchr(p, ':');
1439 if (pp && pp[1] == '$' && pp[2] == '1' &&
1440 pp[3] == '$' && pp[4]) {
1442 cipher = pw_encrypt(u+1, pp);
1443 if (strcmp(cipher, pp) == 0)
1444 goto set_remoteuser_var; /* Ok */
1450 if (strcmp(p, request) == 0) {
1452 config->remoteuser = strdup(request);
1453 if (config->remoteuser)
1454 config->remoteuser[(u - request)] = 0;
1461 return prev == NULL;
1464 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1466 /****************************************************************************
1468 > $Function: handle_sigalrm()
1470 * $Description: Handle timeouts
1472 ****************************************************************************/
1474 static void handle_sigalrm(int sig)
1476 sendHeaders(HTTP_REQUEST_TIMEOUT);
1477 config->alarm_signaled = sig;
1480 /****************************************************************************
1482 > $Function: handleIncoming()
1484 * $Description: Handle an incoming http request.
1486 ****************************************************************************/
1487 static void handleIncoming(void)
1489 char *buf = config->buf;
1496 #if ENABLE_FEATURE_HTTPD_CGI
1497 const char *prequest = request_GET;
1498 unsigned long length = 0;
1500 char *content_type = 0;
1505 struct sigaction sa;
1507 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1508 int credentials = -1; /* if not required this is Ok */
1511 sa.sa_handler = handle_sigalrm;
1512 sigemptyset(&sa.sa_mask);
1513 sa.sa_flags = 0; /* no SA_RESTART */
1514 sigaction(SIGALRM, &sa, NULL);
1519 (void) alarm(TIMEOUT);
1523 purl = strpbrk(buf, " \t");
1526 sendHeaders(HTTP_BAD_REQUEST);
1530 #if ENABLE_FEATURE_HTTPD_CGI
1531 if (strcasecmp(buf, prequest) != 0) {
1533 if (strcasecmp(buf, prequest) != 0) {
1534 sendHeaders(HTTP_NOT_IMPLEMENTED);
1539 if (strcasecmp(buf, request_GET) != 0) {
1540 sendHeaders(HTTP_NOT_IMPLEMENTED);
1545 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1547 if (count < 1 || buf[0] != '/') {
1548 /* Garbled request/URL */
1551 url = alloca(strlen(buf) + sizeof("/index.html"));
1553 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1557 /* extract url args if present */
1558 test = strchr(url, '?');
1559 config->query = NULL;
1562 config->query = test;
1565 test = decodeString(url, 0);
1568 if (test == url+1) {
1569 /* '/' or NUL is encoded */
1570 sendHeaders(HTTP_NOT_FOUND);
1574 /* algorithm stolen from libbb bb_simplify_path(),
1575 * but don't strdup and reducing trailing slash and protect out root */
1579 /* skip duplicate (or initial) slash */
1584 /* skip extra '.' */
1585 if (test[1] == '/' || !test[1]) {
1588 /* '..': be careful */
1589 if (test[1] == '.' && (test[2] == '/' || !test[2])) {
1592 /* protect out root */
1595 while (*--purl != '/') /* omit previous dir */;
1602 *++purl = '\0'; /* so keep last character */
1603 test = purl; /* end ptr */
1605 /* If URL is directory, adding '/' */
1606 if (test[-1] != '/') {
1607 if (is_directory(url + 1, 1, &sb)) {
1608 config->found_moved_temporarily = url;
1612 fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1615 ip_allowed = checkPermIP();
1616 while (ip_allowed && (test = strchr(test + 1, '/')) != NULL) {
1617 /* have path1/path2 */
1619 if (is_directory(url + 1, 1, &sb)) {
1620 /* may be having subdir config */
1621 parse_conf(url + 1, SUBDIR_PARSE);
1622 ip_allowed = checkPermIP();
1627 /* read until blank line for HTTP version specified, else parse immediate */
1635 fprintf(stderr, "header: '%s'\n", buf);
1637 #if ENABLE_FEATURE_HTTPD_CGI
1638 /* try and do our best to parse more lines */
1639 if ((STRNCASECMP(buf, "Content-length:") == 0)) {
1640 /* extra read only for POST */
1641 if (prequest != request_GET) {
1642 test = buf + sizeof("Content-length:")-1;
1646 /* not using strtoul: it ignores leading munis! */
1647 length = strtol(test, &test, 10);
1648 /* length is "ulong", but we need to pass it to int later */
1649 /* so we check for negative or too large values in one go: */
1650 /* (long -> ulong conv caused negatives to be seen as > INT_MAX) */
1651 if (test[0] || errno || length > INT_MAX)
1654 } else if ((STRNCASECMP(buf, "Cookie:") == 0)) {
1655 cookie = strdup(skip_whitespace(buf + sizeof("Cookie:")-1));
1656 } else if ((STRNCASECMP(buf, "Content-Type:") == 0)) {
1657 content_type = strdup(skip_whitespace(buf + sizeof("Content-Type:")-1));
1658 } else if ((STRNCASECMP(buf, "Referer:") == 0)) {
1659 config->referer = strdup(skip_whitespace(buf + sizeof("Referer:")-1));
1663 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1664 if (STRNCASECMP(buf, "Authorization:") == 0) {
1665 /* We only allow Basic credentials.
1666 * It shows up as "Authorization: Basic <userid:password>" where
1667 * the userid:password is base64 encoded.
1669 test = skip_whitespace(buf + sizeof("Authorization:")-1);
1670 if (STRNCASECMP(test, "Basic") != 0)
1672 test += sizeof("Basic")-1;
1673 /* decodeBase64() skips whitespace itself */
1675 credentials = checkPerm(url, test);
1677 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1679 } /* while extra header reading */
1682 if (config->alarm_signaled)
1685 if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1686 /* protect listing [/path]/httpd_conf or IP deny */
1687 #if ENABLE_FEATURE_HTTPD_CGI
1688 FORBIDDEN: /* protect listing /cgi-bin */
1690 sendHeaders(HTTP_FORBIDDEN);
1694 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1695 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1696 sendHeaders(HTTP_UNAUTHORIZED);
1701 if (config->found_moved_temporarily) {
1702 sendHeaders(HTTP_MOVED_TEMPORARILY);
1703 /* clear unforked memory flag */
1704 config->found_moved_temporarily = NULL;
1708 test = url + 1; /* skip first '/' */
1710 #if ENABLE_FEATURE_HTTPD_CGI
1711 if (strncmp(test, "cgi-bin", 7) == 0) {
1712 if (test[7] == '/' && test[8] == 0)
1713 goto FORBIDDEN; /* protect listing cgi-bin/ */
1714 sendCgi(url, prequest, length, cookie, content_type);
1717 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1719 char *suffix = strrchr(test, '.');
1722 for (cur = config->script_i; cur; cur = cur->next) {
1723 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1724 sendCgi(url, prequest, length, cookie, content_type);
1731 if (prequest != request_GET) {
1732 sendHeaders(HTTP_NOT_IMPLEMENTED);
1735 #endif /* FEATURE_HTTPD_CGI */
1736 if (purl[-1] == '/')
1737 strcpy(purl, "index.html");
1738 if (stat(test, &sb) == 0) {
1739 /* It's a dir URL and there is index.html */
1740 config->ContentLength = sb.st_size;
1741 config->last_mod = sb.st_mtime;
1743 #if ENABLE_FEATURE_HTTPD_CGI
1744 else if (purl[-1] == '/') {
1745 /* It's a dir URL and there is no index.html
1746 * Try cgi-bin/index.cgi */
1747 if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
1749 config->query = url;
1750 sendCgi("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
1754 #endif /* FEATURE_HTTPD_CGI */
1756 config->ContentLength = -1;
1759 #if ENABLE_FEATURE_HTTPD_CGI
1764 fprintf(stderr, "closing socket\n\n");
1765 #if ENABLE_FEATURE_HTTPD_CGI
1768 free(config->referer);
1769 config->referer = NULL;
1770 # if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1771 free(config->remoteuser);
1772 config->remoteuser = NULL;
1775 shutdown(config->accepted_socket, SHUT_WR);
1777 /* Properly wait for remote to closed */
1779 FD_SET(config->accepted_socket, &s_fd);
1784 retval = select(config->accepted_socket + 1, &s_fd, NULL, NULL, &tv);
1785 } while (retval > 0 && read(config->accepted_socket, buf, sizeof(config->buf) > 0));
1787 shutdown(config->accepted_socket, SHUT_RD);
1788 /* In inetd case, we close fd 1 (stdout) here. We will exit soon anyway */
1789 close(config->accepted_socket);
1792 /****************************************************************************
1794 > $Function: miniHttpd()
1796 * $Description: The main http server function.
1798 * Given an open socket fildes, listen for new connections and farm out
1799 * the processing as a forked process.
1802 * (int) server. . . The server socket fildes.
1804 * $Return: (int) . . . . Always 0.
1806 ****************************************************************************/
1807 static int miniHttpd(int server)
1809 fd_set readfd, portfd;
1812 FD_SET(server, &portfd);
1814 /* copy the ports we are watching to the readfd set */
1819 struct sockaddr_in sin;
1820 USE_FEATURE_IPV6(struct sockaddr_in6 sin6;)
1822 socklen_t fromAddrLen = sizeof(fromAddr);
1824 /* Now wait INDEFINITELY on the set of sockets! */
1826 if (select(server + 1, &readfd, 0, 0, 0) <= 0)
1828 if (!FD_ISSET(server, &readfd))
1830 s = accept(server, &fromAddr.sa, &fromAddrLen);
1833 config->accepted_socket = s;
1836 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1837 free(config->rmt_ip_str);
1838 config->rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen);
1840 bb_error_msg("connection from '%s'", config->rmt_ip_str);
1842 #endif /* FEATURE_HTTPD_CGI */
1843 if (fromAddr.sa.sa_family == AF_INET) {
1844 config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1845 config->port = ntohs(fromAddr.sin.sin_port);
1847 #if ENABLE_FEATURE_IPV6
1848 if (fromAddr.sa.sa_family == AF_INET6) {
1849 //config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1850 config->port = ntohs(fromAddr.sin6.sin6_port);
1854 /* set the KEEPALIVE option to cull dead connections */
1855 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
1857 if (DEBUG || fork() == 0) {
1859 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1860 /* protect reload config, may be confuse checking */
1861 signal(SIGHUP, SIG_IGN);
1873 static int miniHttpd_inetd(void)
1877 struct sockaddr_in sin;
1878 USE_FEATURE_IPV6(struct sockaddr_in6 sin6;)
1880 socklen_t fromAddrLen = sizeof(fromAddr);
1882 getpeername(0, &fromAddr.sa, &fromAddrLen);
1885 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1886 free(config->rmt_ip_str);
1887 config->rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddrLen);
1889 if (fromAddr.sa.sa_family == AF_INET) {
1890 config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1891 config->port = ntohs(fromAddr.sin.sin_port);
1893 #if ENABLE_FEATURE_IPV6
1894 if (fromAddr.sa.sa_family == AF_INET6) {
1895 //config->rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
1896 config->port = ntohs(fromAddr.sin6.sin6_port);
1903 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1904 static void sighup_handler(int sig)
1907 struct sigaction sa;
1909 parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1910 sa.sa_handler = sighup_handler;
1911 sigemptyset(&sa.sa_mask);
1912 sa.sa_flags = SA_RESTART;
1913 sigaction(SIGHUP, &sa, NULL);
1918 c_opt_config_file = 0,
1921 USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
1922 USE_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
1923 USE_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
1924 USE_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
1928 OPT_CONFIG_FILE = 1 << c_opt_config_file,
1929 OPT_DECODE_URL = 1 << d_opt_decode_url,
1930 OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
1931 OPT_ENCODE_URL = USE_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
1932 OPT_REALM = USE_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
1933 OPT_MD5 = USE_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
1934 OPT_SETUID = USE_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
1935 OPT_PORT = 1 << p_opt_port,
1936 OPT_INETD = 1 << p_opt_inetd,
1937 OPT_FOREGROUND = 1 << p_opt_foreground,
1941 int httpd_main(int argc, char **argv);
1942 int httpd_main(int argc, char **argv)
1945 const char *home_httpd = home;
1946 char *url_for_decode;
1947 USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
1949 USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
1950 USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
1951 USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
1953 #if ENABLE_LOCALE_SUPPORT
1954 /* Undo busybox.c: we want to speak English in http (dates etc) */
1955 setlocale(LC_TIME, "C");
1958 config = xzalloc(sizeof(*config));
1959 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1960 config->realm = "Web Server Authentication";
1963 config->ContentLength = -1;
1965 opt = getopt32(argc, argv, "c:d:h:"
1966 USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
1967 USE_FEATURE_HTTPD_BASIC_AUTH("r:")
1968 USE_FEATURE_HTTPD_AUTH_MD5("m:")
1969 USE_FEATURE_HTTPD_SETUID("u:")
1971 &(config->configFile), &url_for_decode, &home_httpd
1972 USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
1973 USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm))
1974 USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
1975 USE_FEATURE_HTTPD_SETUID(, &s_ugid)
1978 if (opt & OPT_DECODE_URL) {
1979 printf("%s", decodeString(url_for_decode, 1));
1982 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
1983 if (opt & OPT_ENCODE_URL) {
1984 printf("%s", encodeString(url_for_encode));
1988 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
1989 if (opt & OPT_MD5) {
1990 puts(pw_encrypt(pass, "$1$"));
1995 config->port = xatou16(s_port);
1997 #if ENABLE_FEATURE_HTTPD_SETUID
1998 if (opt & OPT_SETUID) {
1999 if (!get_uidgid(&ugid, s_ugid, 1))
2000 bb_error_msg_and_die("unrecognized user[:group] "
2001 "name '%s'", s_ugid);
2006 if (!(opt & OPT_INETD)) {
2007 signal(SIGCHLD, SIG_IGN);
2008 config->server_socket = openServer();
2009 #if ENABLE_FEATURE_HTTPD_SETUID
2010 /* drop privileges */
2011 if (opt & OPT_SETUID) {
2012 if (ugid.gid != (gid_t)-1) {
2013 if (setgroups(1, &ugid.gid) == -1)
2014 bb_perror_msg_and_die("setgroups");
2022 #if ENABLE_FEATURE_HTTPD_CGI
2024 char *p = getenv("PATH");
2025 p = xstrdup(p); /* if gets NULL, returns NULL */
2029 if (!(opt & OPT_INETD))
2030 setenv_long("SERVER_PORT", config->port);
2034 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2037 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2040 if (opt & OPT_INETD)
2041 return miniHttpd_inetd();
2043 if (!(opt & OPT_FOREGROUND))
2044 bb_daemonize(0); /* don't change current directory */
2045 return miniHttpd(config->server_socket);