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.
27 * The server can also be invoked as a url arg decoder and html text encoder
29 * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
30 * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
31 * Note that url encoding for arguments is not the same as html encoding for
32 * presentation. -d decodes a url-encoded argument while -e encodes in html
35 * httpd.conf has the following format:
37 * A:172.20. # Allow address from 172.20.0.0/16
38 * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
39 * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
40 * A:127.0.0.1 # Allow local loopback connections
41 * D:* # Deny from other IP connections
42 * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
43 * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
44 * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
45 * .au:audio/basic # additional mime type for audio.au files
46 * *.php:/path/php # running cgi.php scripts through an interpreter
48 * A/D may be as a/d or allow/deny - first char case insensitive
49 * Deny IP rules take precedence over allow rules.
52 * The Deny/Allow IP logic:
54 * - Default is to allow all. No addresses are denied unless
55 * denied with a D: rule.
56 * - Order of Deny/Allow rules is significant
57 * - Deny rules take precedence over allow rules.
58 * - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
60 * - Specification of Allow all (A:*) is a no-op
63 * 1. Allow only specified addresses
64 * A:172.20 # Allow any address that begins with 172.20.
65 * A:10.10. # Allow any address that begins with 10.10.
66 * A:127.0.0.1 # Allow local loopback connections
67 * D:* # Deny from other IP connections
69 * 2. Only deny specified addresses
70 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
71 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
72 * A:* # (optional line added for clarity)
74 * If a sub directory contains a config file it is parsed and merged with
75 * any existing settings as if it was appended to the original configuration.
77 * subdir paths are relative to the containing subdir and thus cannot
78 * affect the parent rules.
80 * Note that since the sub dir is parsed in the forked thread servicing the
81 * subdir http request, any merge is discarded when the process exits. As a
82 * result, the subdir settings only have a lifetime of a single request.
85 * If -c is not set, an attempt will be made to open the default
86 * root configuration file. If -c is set and the file is not found, the
87 * server exits with an error.
95 static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
96 static const char default_path_httpd_conf[] = "/etc";
97 static const char httpd_conf[] = "httpd.conf";
98 static const char home[] = "./";
101 # define cont_l_fmt "%lld"
102 # define cont_l_type (long long)
104 # define cont_l_fmt "%ld"
105 # define cont_l_type (long)
110 // Note: busybox xfuncs are not used because we want the server to keep running
111 // if something bad happens due to a malformed user request.
112 // As a result, all memory allocation after daemonize
113 // is checked rigorously
121 #define MAX_MEMORY_BUFF 8192 /* IO buffer */
123 typedef struct HT_ACCESS {
125 struct HT_ACCESS *next;
126 char before_colon[1]; /* really bigger, must last */
129 typedef struct HT_ACCESS_IP {
133 struct HT_ACCESS_IP *next;
137 char buf[MAX_MEMORY_BUFF];
139 USE_FEATURE_HTTPD_BASIC_AUTH(const char *realm;)
140 USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
144 USE_FEATURE_HTTPD_CGI(char *referer;)
146 const char *configFile;
149 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
150 char rmt_ip_str[16]; /* for set env REMOTE_ADDR */
152 unsigned port; /* server initial port and for
153 set env REMOTE_PORT */
155 const char *found_mime_type;
156 const char *found_moved_temporarily;
159 off_t ContentLength; /* -1 - unknown */
162 Htaccess_IP *ip_a_d; /* config allow/deny lines */
164 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
165 Htaccess *auth; /* config user:password lines */
167 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
168 Htaccess *mime_a; /* config mime types */
171 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
173 # define a_c_r config->accepted_socket
174 # define a_c_w config->accepted_socket
179 volatile int alarm_signaled;
181 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
182 Htaccess *script_i; /* config script interpreters */
186 static HttpdConfig *config;
188 static const char request_GET[] = "GET"; /* size algorithmic optimize */
190 static const char* const suffixTable [] = {
191 /* Warning: shorted equivalent suffix in one line must be first */
192 ".htm.html", "text/html",
193 ".jpg.jpeg", "image/jpeg",
196 ".txt.h.c.cc.cpp", "text/plain",
199 ".avi", "video/x-msvideo",
200 ".qt.mov", "video/quicktime",
201 ".mpe.mpeg", "video/mpeg",
202 ".mid.midi", "audio/midi",
203 ".mp3", "audio/mpeg",
204 #if 0 /* unpopular */
205 ".au", "audio/basic",
206 ".pac", "application/x-ns-proxy-autoconfig",
207 ".vrml.wrl", "model/vrml",
209 0, "application/octet-stream" /* default */
214 HTTP_MOVED_TEMPORARILY = 302,
215 HTTP_BAD_REQUEST = 400, /* malformed syntax */
216 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
217 HTTP_NOT_FOUND = 404,
218 HTTP_FORBIDDEN = 403,
219 HTTP_REQUEST_TIMEOUT = 408,
220 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
221 HTTP_INTERNAL_SERVER_ERROR = 500,
222 #if 0 /* future use */
224 HTTP_SWITCHING_PROTOCOLS = 101,
227 HTTP_NON_AUTHORITATIVE_INFO = 203,
228 HTTP_NO_CONTENT = 204,
229 HTTP_MULTIPLE_CHOICES = 300,
230 HTTP_MOVED_PERMANENTLY = 301,
231 HTTP_NOT_MODIFIED = 304,
232 HTTP_PAYMENT_REQUIRED = 402,
233 HTTP_BAD_GATEWAY = 502,
234 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
235 HTTP_RESPONSE_SETSIZE = 0xffffffff
240 HttpResponseNum type;
245 static const HttpEnumString httpResponseNames[] = {
246 { HTTP_OK, "OK", NULL },
247 { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
248 { HTTP_REQUEST_TIMEOUT, "Request Timeout",
249 "No request appeared within a reasonable time period." },
250 { HTTP_NOT_IMPLEMENTED, "Not Implemented",
251 "The requested method is not recognized by this server." },
252 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
253 { HTTP_UNAUTHORIZED, "Unauthorized", "" },
255 { HTTP_NOT_FOUND, "Not Found",
256 "The requested URL was not found on this server." },
257 { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
258 { HTTP_FORBIDDEN, "Forbidden", "" },
259 { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
260 "Internal Server Error" },
261 #if 0 /* not implemented */
262 { HTTP_CREATED, "Created" },
263 { HTTP_ACCEPTED, "Accepted" },
264 { HTTP_NO_CONTENT, "No Content" },
265 { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
266 { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
267 { HTTP_NOT_MODIFIED, "Not Modified" },
268 { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
269 { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
274 static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
275 static const char Content_length[] = "Content-length:";
278 static int scan_ip(const char **ep, unsigned int *ip, unsigned char endc)
285 for (j = 0; j < 4; j++) {
288 if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
291 while (*p >= '0' && *p <= '9') {
300 if (*p != '/' && *p != 0)
302 *ip = ((*ip) << 8) | octet;
315 static int scan_ip_mask(const char *ipm, unsigned int *ip, unsigned int *mask)
320 i = scan_ip(&ipm, ip, '/');
328 if (*p < '0' || *p > '9') {
330 i = scan_ip(&ipm, mask, 0);
352 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
353 static void free_config_lines(Htaccess **pprev)
355 Htaccess *prev = *pprev;
358 Htaccess *cur = prev;
368 #define FIRST_PARSE 0
369 #define SUBDIR_PARSE 1
370 #define SIGNALED_PARSE 2
371 #define FIND_FROM_HTTPD_ROOT 3
372 /****************************************************************************
374 > $Function: parse_conf()
376 * $Description: parse configuration file into in-memory linked list.
378 * The first non-white character is examined to determine if the config line
379 * is one of the following:
380 * .ext:mime/type # new mime type not compiled into httpd
381 * [adAD]:from # ip address allow/deny, * for wildcard
382 * /path:user:pass # username/password
384 * Any previous IP rules are discarded.
385 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
386 * are also discarded. That is, previous settings are retained if flag is
390 * (const char *) path . . null for ip address checks, path for password
392 * (int) flag . . . . . . the source of the parse request.
396 ****************************************************************************/
397 static void parse_conf(const char *path, int flag)
400 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
401 Htaccess *prev, *cur;
402 #elif CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
406 const char *cf = config->configFile;
411 /* free previous ip setup if present */
412 Htaccess_IP *pip = config->ip_a_d;
415 Htaccess_IP *cur_ipl = pip;
420 config->ip_a_d = NULL;
422 config->flg_deny_all = 0;
424 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
425 /* retain previous auth and mime config only for subdir parse */
426 if (flag != SUBDIR_PARSE) {
427 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
428 free_config_lines(&config->auth);
430 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
431 free_config_lines(&config->mime_a);
433 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
434 free_config_lines(&config->script_i);
439 if (flag == SUBDIR_PARSE || cf == NULL) {
440 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
442 if (flag == FIRST_PARSE)
443 bb_error_msg_and_die(bb_msg_memory_exhausted);
446 sprintf((char *)cf, "%s/%s", path, httpd_conf);
449 while ((f = fopen(cf, "r")) == NULL) {
450 if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
451 /* config file not found, no changes to config */
454 if (config->configFile && flag == FIRST_PARSE) /* if -c option given */
455 bb_perror_msg_and_die("%s", cf);
456 flag = FIND_FROM_HTTPD_ROOT;
460 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
463 /* This could stand some work */
464 while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
466 for (p = p0; *p0 != 0 && *p0 != '#'; p0++) {
469 if (*p0 == ':' && c == NULL)
475 /* test for empty or strange line */
476 if (c == NULL || *c == 0)
483 /* memorize deny all */
484 config->flg_deny_all++;
486 /* skip default other "word:*" config lines */
492 else if (*p0 != 'D' && *p0 != 'A'
493 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
496 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
499 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
504 if (*p0 == 'A' || *p0 == 'D') {
505 /* storing current config IP line */
506 pip = calloc(1, sizeof(Htaccess_IP));
508 if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) {
509 /* syntax IP{/mask} error detected, protect all */
513 pip->allow_deny = *p0;
515 /* Deny:form_IP move top */
516 pip->next = config->ip_a_d;
517 config->ip_a_d = pip;
519 /* add to bottom A:form_IP config line */
520 Htaccess_IP *prev_IP = config->ip_a_d;
522 if (prev_IP == NULL) {
523 config->ip_a_d = pip;
525 while (prev_IP->next)
526 prev_IP = prev_IP->next;
533 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
535 /* make full path from httpd root / curent_path / config_line_path */
536 cf = flag == SUBDIR_PARSE ? path : "";
537 p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
541 sprintf(p0, "/%s%s", cf, buf);
543 /* another call bb_simplify_path */
548 if (*cf == '/') { /* skip duplicate (or initial) slash */
550 } else if (*cf == '.') {
551 if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
553 } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
556 while (*--p != '/') /* omit previous dir */;
565 if ((p == p0) || (*p != '/')) { /* not a trailing slash */
566 ++p; /* so keep last character */
569 sprintf(p0, "%s:%s", p0, c);
573 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
574 /* storing current config line */
575 cur = calloc(1, sizeof(Htaccess) + strlen(p0));
577 cf = strcpy(cur->before_colon, p0);
580 cur->after_colon = c;
581 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
583 /* config .mime line move top for overwrite previous */
584 cur->next = config->mime_a;
585 config->mime_a = cur;
589 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
590 if (*cf == '*' && cf[1] == '.') {
591 /* config script interpreter line move top for overwrite previous */
592 cur->next = config->script_i;
593 config->script_i = cur;
597 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
601 config->auth = prev = cur;
603 /* sort path, if current lenght eq or bigger then move up */
604 Htaccess *prev_hti = config->auth;
605 size_t l = strlen(cf);
608 for (hti = prev_hti; hti; hti = hti->next) {
609 if (l >= strlen(hti->before_colon)) {
610 /* insert before hti */
612 if (prev_hti != hti) {
613 prev_hti->next = cur;
621 prev_hti = prev_hti->next;
623 if (!hti) { /* not inserted, add to bottom */
635 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
636 /****************************************************************************
638 > $Function: encodeString()
640 * $Description: Given a string, html encode special characters.
641 * This is used for the -e command line option to provide an easy way
642 * for scripts to encode result data without confusing browsers. The
643 * returned string pointer is memory allocated by malloc().
646 * (const char *) string . . The first string to encode.
648 * $Return: (char *) . . . .. . . A pointer to the encoded string.
650 * $Errors: Returns a null string ("") if memory is not available.
652 ****************************************************************************/
653 static char *encodeString(const char *string)
655 /* take the simple route and encode everything */
656 /* could possibly scan once to get length. */
657 int len = strlen(string);
658 char *out = malloc(len * 6 + 1);
663 while ((ch = *string++)) {
664 // very simple check for what to encode
665 if (isalnum(ch)) *p++ = ch;
666 else p += sprintf(p, "&#%d;", (unsigned char) ch);
671 #endif /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */
673 /****************************************************************************
675 > $Function: decodeString()
677 * $Description: Given a URL encoded string, convert it to plain ascii.
678 * Since decoding always makes strings smaller, the decode is done in-place.
679 * Thus, callers should strdup() the argument if they do not want the
680 * argument modified. The return is the original pointer, allowing this
681 * function to be easily used as arguments to other functions.
684 * (char *) string . . . The first string to decode.
685 * (int) flag . . . 1 if require decode '+' as ' ' for CGI
687 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
691 ****************************************************************************/
692 static char *decodeString(char *orig, int flag_plus_to_space)
694 /* note that decoded string is always shorter than original */
699 if (*ptr == '+' && flag_plus_to_space) { *string++ = ' '; ptr++; }
700 else if (*ptr != '%') *string++ = *ptr++;
702 unsigned int value1, value2;
705 if (sscanf(ptr, "%1X", &value1) != 1 ||
706 sscanf(ptr+1, "%1X", &value2) != 1) {
707 if (!flag_plus_to_space)
711 value1 = value1 * 16 + value2;
712 if (value1 == '/' || value1 == 0)
724 #if ENABLE_FEATURE_HTTPD_CGI
725 /****************************************************************************
727 > $Function: addEnv()
729 * $Description: Add an environment variable setting to the global list.
730 * A NAME=VALUE string is allocated, filled, and added to the list of
731 * environment settings passed to the cgi execution script.
734 * (char *) name_before_underline - The first part environment variable name.
735 * (char *) name_after_underline - The second part environment variable name.
736 * (char *) value . . The value to which the env variable is set.
740 * $Errors: Silently returns if the env runs out of space to hold the new item
742 ****************************************************************************/
743 static void addEnv(const char *name_before_underline,
744 const char *name_after_underline, const char *value)
747 const char *underline;
751 underline = *name_after_underline ? "_" : "";
752 asprintf(&s, "%s%s%s=%s", name_before_underline, underline,
753 name_after_underline, value);
759 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV || ENABLE_FEATURE_HTTPD_WITHOUT_INETD
760 /* set environs SERVER_PORT and REMOTE_PORT */
761 static void addEnvPort(const char *port_name)
765 sprintf(buf, "%u", config->port);
766 addEnv(port_name, "PORT", buf);
769 #endif /* CONFIG_FEATURE_HTTPD_CGI */
772 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
773 /****************************************************************************
775 > $Function: decodeBase64()
777 > $Description: Decode a base 64 data stream as per rfc1521.
778 * Note that the rfc states that none base64 chars are to be ignored.
779 * Since the decode always results in a shorter size than the input, it is
780 * OK to pass the input arg as an output arg.
783 * (char *) Data . . . . A pointer to a base64 encoded string.
784 * Where to place the decoded data.
790 ****************************************************************************/
791 static void decodeBase64(char *Data)
794 const unsigned char *in = (const unsigned char *)Data;
795 // The decoded size will be at most 3/4 the size of the encoded
796 unsigned long ch = 0;
802 if (t >= '0' && t <= '9')
804 else if (t >= 'A' && t <= 'Z')
806 else if (t >= 'a' && t <= 'z')
820 *Data++ = (char) (ch >> 16);
821 *Data++ = (char) (ch >> 8);
831 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
832 /****************************************************************************
834 > $Function: openServer()
836 * $Description: create a listen server socket on the designated port.
838 * $Return: (int) . . . A connection socket. -1 for errors.
842 ****************************************************************************/
843 static int openServer(void)
845 struct sockaddr_in lsocket;
849 /* create the socket right now */
850 /* inet_addr() returns a value that is already in network order */
851 memset(&lsocket, 0, sizeof(lsocket));
852 lsocket.sin_family = AF_INET;
853 lsocket.sin_addr.s_addr = INADDR_ANY;
854 lsocket.sin_port = htons(config->port);
855 fd = xsocket(AF_INET, SOCK_STREAM, 0);
856 /* tell the OS it's OK to reuse a previous address even though */
857 /* it may still be in a close down state. Allows bind to succeed. */
859 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on));
861 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on));
863 xbind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket));
865 signal(SIGCHLD, SIG_IGN); /* prevent zombie (defunct) processes */
868 #endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
870 /****************************************************************************
872 > $Function: sendHeaders()
874 * $Description: Create and send HTTP response headers.
875 * The arguments are combined and sent as one write operation. Note that
876 * IE will puke big-time if the headers are not sent in one packet and the
877 * second packet is delayed for any reason.
880 * (HttpResponseNum) responseNum . . . The result code to send.
882 * $Return: (int) . . . . writing errors
884 ****************************************************************************/
885 static int sendHeaders(HttpResponseNum responseNum)
887 char *buf = config->buf;
888 const char *responseString = "";
889 const char *infoString = 0;
890 const char *mime_type;
892 time_t timer = time(0);
897 i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
898 if (httpResponseNames[i].type == responseNum) {
899 responseString = httpResponseNames[i].name;
900 infoString = httpResponseNames[i].info;
904 /* error message is HTML */
905 mime_type = responseNum == HTTP_OK ?
906 config->httpd_found.found_mime_type : "text/html";
908 /* emit the current date */
909 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
911 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
912 "Date: %s\r\nConnection: close\r\n",
913 responseNum, responseString, mime_type, timeStr);
915 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
916 if (responseNum == HTTP_UNAUTHORIZED) {
917 len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
921 if (responseNum == HTTP_MOVED_TEMPORARILY) {
922 len += sprintf(buf+len, "Location: %s/%s%s\r\n",
923 config->httpd_found.found_moved_temporarily,
924 (config->query ? "?" : ""),
925 (config->query ? config->query : ""));
928 if (config->ContentLength != -1) { /* file */
929 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
930 len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n",
931 timeStr, Content_length, cont_l_type config->ContentLength);
936 len += sprintf(buf+len,
937 "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
938 "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
939 responseNum, responseString,
940 responseNum, responseString, infoString);
943 fprintf(stderr, "Headers: '%s'", buf);
945 return full_write(a_c_w, buf, len);
948 /****************************************************************************
950 > $Function: getLine()
952 * $Description: Read from the socket until an end of line char found.
954 * Characters are read one at a time until an eol sequence is found.
956 * $Return: (int) . . . . number of characters read. -1 if error.
958 ****************************************************************************/
959 static int getLine(void)
962 char *buf = config->buf;
964 while (read(a_c_r, buf + count, 1) == 1) {
965 if (buf[count] == '\r') continue;
966 if (buf[count] == '\n') {
970 if (count < (MAX_MEMORY_BUFF-1)) /* check owerflow */
973 if (count) return count;
977 #if ENABLE_FEATURE_HTTPD_CGI
978 /****************************************************************************
980 > $Function: sendCgi()
982 * $Description: Execute a CGI script and send it's stdout back
984 * Environment variables are set up and the script is invoked with pipes
985 * for stdin/stdout. If a post is being done the script is fed the POST
986 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
989 * (const char *) url . . . . . . The requested URL (with leading /).
990 * (int bodyLen) . . . . . . . . Length of the post body.
991 * (const char *cookie) . . . . . For set HTTP_COOKIE.
992 * (const char *content_type) . . For set CONTENT_TYPE.
995 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
999 ****************************************************************************/
1000 static int sendCgi(const char *url,
1001 const char *request, int bodyLen, const char *cookie,
1002 const char *content_type)
1004 int fromCgi[2]; /* pipe for reading data from CGI */
1005 int toCgi[2]; /* pipe for sending data to CGI */
1007 static char * argp[] = { 0, 0 };
1014 if (pipe(fromCgi) != 0) {
1017 if (pipe(toCgi) != 0) {
1030 char *purl = strdup(url);
1031 char realpath_buff[MAXPATHLEN];
1039 dup2(inFd, 0); // replace stdin with the pipe
1040 dup2(outFd, 1); // replace stdout with the pipe
1042 dup2(outFd, 2); // replace stderr with the pipe
1053 while ((script = strchr(script + 1, '/')) != NULL) {
1054 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1058 if (is_directory(purl + 1, 1, &sb) == 0) {
1059 /* not directory, found script.cgi/PATH_INFO */
1063 *script = '/'; /* is directory, find next '/' */
1065 addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */
1066 addEnv("PATH", "", getenv("PATH"));
1067 addEnv("REQUEST", "METHOD", request);
1068 if (config->query) {
1069 char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1071 sprintf(uri, "%s?%s", purl, config->query);
1072 addEnv("REQUEST", "URI", uri);
1074 addEnv("REQUEST", "URI", purl);
1077 *script = '\0'; /* reduce /PATH_INFO */
1078 /* SCRIPT_FILENAME required by PHP in CGI mode */
1079 if (realpath(purl + 1, realpath_buff))
1080 addEnv("SCRIPT", "FILENAME", realpath_buff);
1083 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1084 addEnv("SCRIPT_NAME", "", purl);
1085 addEnv("QUERY_STRING", "", config->query);
1086 addEnv("SERVER", "SOFTWARE", httpdVersion);
1087 addEnv("SERVER", "PROTOCOL", "HTTP/1.0");
1088 addEnv("GATEWAY_INTERFACE", "", "CGI/1.1");
1089 addEnv("REMOTE", "ADDR", config->rmt_ip_str);
1090 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1091 addEnvPort("REMOTE");
1096 sprintf(sbl, "%d", bodyLen);
1097 addEnv("CONTENT", "LENGTH", sbl);
1100 addEnv("HTTP", "COOKIE", cookie);
1102 addEnv("CONTENT", "TYPE", content_type);
1103 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1104 if (config->remoteuser) {
1105 addEnv("REMOTE", "USER", config->remoteuser);
1106 addEnv("AUTH_TYPE", "", "Basic");
1109 if (config->referer)
1110 addEnv("HTTP", "REFERER", config->referer);
1112 /* set execve argp[0] without path */
1113 argp[0] = strrchr(purl, '/') + 1;
1114 /* but script argp[0] must have absolute path and chdiring to this */
1115 if (*realpath_buff) {
1116 script = strrchr(realpath_buff, '/');
1119 if (chdir(realpath_buff) == 0) {
1120 // now run the program. If it fails,
1121 // use _exit() so no destructors
1122 // get called and make a mess.
1123 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1124 char *interpr = NULL;
1125 char *suffix = strrchr(purl, '.');
1129 for (cur = config->script_i; cur; cur = cur->next)
1130 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1131 interpr = cur->after_colon;
1137 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1139 execv(interpr, argp);
1142 execv(realpath_buff, argp);
1146 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1147 config->accepted_socket = 1; /* send to stdout */
1149 sendHeaders(HTTP_NOT_FOUND);
1156 /* parent process */
1158 size_t post_readed_size = 0, post_readed_idx = 0;
1164 signal(SIGPIPE, SIG_IGN);
1175 FD_SET(inFd, &readSet);
1176 if (bodyLen > 0 || post_readed_size > 0) {
1177 FD_SET(outFd, &writeSet);
1178 nfound = outFd > inFd ? outFd : inFd;
1179 if (post_readed_size == 0) {
1180 FD_SET(a_c_r, &readSet);
1184 /* Now wait on the set of sockets! */
1185 nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
1191 nfound = select(inFd + 1, &readSet, 0, 0, NULL);
1195 if (waitpid(pid, &status, WNOHANG) > 0) {
1198 if (WIFEXITED(status))
1199 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1200 if (WIFSIGNALED(status))
1201 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1205 } else if (post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
1206 count = full_write(outFd, wbuf + post_readed_idx, post_readed_size);
1208 post_readed_size -= count;
1209 post_readed_idx += count;
1210 if (post_readed_size == 0)
1211 post_readed_idx = 0;
1213 post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
1215 } else if (bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
1216 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1217 count = safe_read(a_c_r, wbuf, count);
1219 post_readed_size += count;
1222 bodyLen = 0; /* closed */
1225 if (FD_ISSET(inFd, &readSet)) {
1227 char *rbuf = config->buf;
1230 # define PIPESIZE 4096 /* amount of buffering in a pipe */
1232 # define PIPESIZE PIPE_BUF
1234 #if PIPESIZE >= MAX_MEMORY_BUFF
1235 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1238 // There is something to read
1239 count = safe_read(inFd, rbuf, PIPESIZE);
1245 /* check to see if the user script added headers */
1246 if (strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
1247 full_write(s, "HTTP/1.0 200 OK\r\n", 17);
1249 if (strstr(rbuf, "ontent-") == 0) {
1250 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1254 if (full_write(s, rbuf, count) != count)
1258 fprintf(stderr, "cgi read %d bytes\n", count);
1266 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1268 /****************************************************************************
1270 > $Function: sendFile()
1272 * $Description: Send a file response to an 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->httpd_found.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->httpd_found.found_mime_type = cur->after_colon;
1308 #endif /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1311 fprintf(stderr, "Sending file '%s' Content-type: %s\n",
1312 url, config->httpd_found.found_mime_type);
1315 f = open(url, O_RDONLY);
1318 char *buf = config->buf;
1320 sendHeaders(HTTP_OK);
1321 while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1322 if (full_write(a_c_w, buf, count) != count)
1328 bb_perror_msg("Unable to open '%s'", url);
1330 sendHeaders(HTTP_NOT_FOUND);
1336 static int checkPermIP(void)
1340 /* This could stand some work */
1341 for (cur = config->ip_a_d; cur; cur = cur->next) {
1343 fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1344 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1345 (unsigned char)(cur->ip >> 24),
1346 (unsigned char)(cur->ip >> 16),
1347 (unsigned char)(cur->ip >> 8),
1349 (unsigned char)(cur->mask >> 24),
1350 (unsigned char)(cur->mask >> 16),
1351 (unsigned char)(cur->mask >> 8),
1354 if ((config->rmt_ip & cur->mask) == cur->ip)
1355 return cur->allow_deny == 'A'; /* Allow/Deny */
1358 /* if unconfigured, return 1 - access from all */
1359 return !config->flg_deny_all;
1362 /****************************************************************************
1364 > $Function: checkPerm()
1366 * $Description: Check the permission file for access password protected.
1368 * If config file isn't present, everything is allowed.
1369 * Entries are of the form you can see example from header source
1372 * (const char *) path . . . . The file path.
1373 * (const char *) request . . . User information to validate.
1375 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1377 ****************************************************************************/
1379 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1380 static int checkPerm(const char *path, const char *request)
1386 const char *prev = NULL;
1388 /* This could stand some work */
1389 for (cur = config->auth; cur; cur = cur->next) {
1390 p0 = cur->before_colon;
1391 if (prev != NULL && strcmp(prev, p0) != 0)
1392 continue; /* find next identical */
1393 p = cur->after_colon;
1395 fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
1398 size_t l = strlen(p0);
1400 if (strncmp(p0, path, l) == 0 &&
1401 (l == 1 || path[l] == '/' || path[l] == 0)) {
1403 /* path match found. Check request */
1404 /* for check next /path:user:password */
1406 u = strchr(request, ':');
1408 /* bad request, ':' required */
1412 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
1417 if (strncmp(p, request, u-request) != 0) {
1418 /* user uncompared */
1421 pp = strchr(p, ':');
1422 if (pp && pp[1] == '$' && pp[2] == '1' &&
1423 pp[3] == '$' && pp[4]) {
1425 cipher = pw_encrypt(u+1, pp);
1426 if (strcmp(cipher, pp) == 0)
1427 goto set_remoteuser_var; /* Ok */
1433 if (strcmp(p, request) == 0) {
1434 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
1437 config->remoteuser = strdup(request);
1438 if (config->remoteuser)
1439 config->remoteuser[(u - request)] = 0;
1447 return prev == NULL;
1450 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1452 /****************************************************************************
1454 > $Function: handle_sigalrm()
1456 * $Description: Handle timeouts
1458 ****************************************************************************/
1460 static void handle_sigalrm(int sig)
1462 sendHeaders(HTTP_REQUEST_TIMEOUT);
1463 config->alarm_signaled = sig;
1466 /****************************************************************************
1468 > $Function: handleIncoming()
1470 * $Description: Handle an incoming http request.
1472 ****************************************************************************/
1473 static void handleIncoming(void)
1475 char *buf = config->buf;
1482 #if ENABLE_FEATURE_HTTPD_CGI
1483 const char *prequest = request_GET;
1486 char *content_type = 0;
1491 struct sigaction sa;
1493 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1494 int credentials = -1; /* if not requred this is Ok */
1497 sa.sa_handler = handle_sigalrm;
1498 sigemptyset(&sa.sa_mask);
1499 sa.sa_flags = 0; /* no SA_RESTART */
1500 sigaction(SIGALRM, &sa, NULL);
1505 (void) alarm(TIMEOUT);
1509 purl = strpbrk(buf, " \t");
1512 sendHeaders(HTTP_BAD_REQUEST);
1516 #if ENABLE_FEATURE_HTTPD_CGI
1517 if (strcasecmp(buf, prequest) != 0) {
1519 if (strcasecmp(buf, prequest) != 0) {
1520 sendHeaders(HTTP_NOT_IMPLEMENTED);
1525 if (strcasecmp(buf, request_GET) != 0) {
1526 sendHeaders(HTTP_NOT_IMPLEMENTED);
1531 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1533 if (count < 1 || buf[0] != '/') {
1534 /* Garbled request/URL */
1537 url = alloca(strlen(buf) + 12); /* + sizeof("/index.html\0") */
1539 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1543 /* extract url args if present */
1544 test = strchr(url, '?');
1547 config->query = test;
1550 test = decodeString(url, 0);
1553 if (test == (buf+1)) {
1554 sendHeaders(HTTP_NOT_FOUND);
1557 /* algorithm stolen from libbb bb_simplify_path(),
1558 but don't strdup and reducing trailing slash and protect out root */
1563 if (*test == '/') { /* skip duplicate (or initial) slash */
1565 } else if (*test == '.') {
1566 if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
1568 } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
1571 /* protect out root */
1574 while (*--purl != '/') /* omit previous dir */;
1582 *++purl = 0; /* so keep last character */
1583 test = purl; /* end ptr */
1585 /* If URL is directory, adding '/' */
1586 if (test[-1] != '/') {
1587 if (is_directory(url + 1, 1, &sb)) {
1588 config->httpd_found.found_moved_temporarily = url;
1592 fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1596 ip_allowed = checkPermIP();
1597 while (ip_allowed && (test = strchr(test + 1, '/')) != NULL) {
1598 /* have path1/path2 */
1600 if (is_directory(url + 1, 1, &sb)) {
1601 /* may be having subdir config */
1602 parse_conf(url + 1, SUBDIR_PARSE);
1603 ip_allowed = checkPermIP();
1608 // read until blank line for HTTP version specified, else parse immediate
1616 fprintf(stderr, "Header: '%s'\n", buf);
1619 #if ENABLE_FEATURE_HTTPD_CGI
1620 /* try and do our best to parse more lines */
1621 if ((strncasecmp(buf, Content_length, 15) == 0)) {
1622 if (prequest != request_GET)
1623 length = strtol(buf + 15, 0, 0); // extra read only for POST
1624 } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
1625 for (test = buf + 7; isspace(*test); test++)
1627 cookie = strdup(test);
1628 } else if ((strncasecmp(buf, "Content-Type:", 13) == 0)) {
1629 for (test = buf + 13; isspace(*test); test++)
1631 content_type = strdup(test);
1632 } else if ((strncasecmp(buf, "Referer:", 8) == 0)) {
1633 for (test = buf + 8; isspace(*test); test++)
1635 config->referer = strdup(test);
1639 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1640 if (strncasecmp(buf, "Authorization:", 14) == 0) {
1641 /* We only allow Basic credentials.
1642 * It shows up as "Authorization: Basic <userid:password>" where
1643 * the userid:password is base64 encoded.
1645 for (test = buf + 14; isspace(*test); test++)
1647 if (strncasecmp(test, "Basic", 5) != 0)
1650 test += 5; /* decodeBase64() skiping space self */
1652 credentials = checkPerm(url, test);
1654 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1656 } /* while extra header reading */
1659 if (config->alarm_signaled)
1662 if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1663 /* protect listing [/path]/httpd_conf or IP deny */
1664 #if ENABLE_FEATURE_HTTPD_CGI
1665 FORBIDDEN: /* protect listing /cgi-bin */
1667 sendHeaders(HTTP_FORBIDDEN);
1671 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1672 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1673 sendHeaders(HTTP_UNAUTHORIZED);
1678 if (config->httpd_found.found_moved_temporarily) {
1679 sendHeaders(HTTP_MOVED_TEMPORARILY);
1681 /* clear unforked memory flag */
1682 config->httpd_found.found_moved_temporarily = NULL;
1687 test = url + 1; /* skip first '/' */
1689 #if ENABLE_FEATURE_HTTPD_CGI
1690 /* if strange Content-Length */
1694 if (strncmp(test, "cgi-bin", 7) == 0) {
1695 if (test[7] == '/' && test[8] == 0)
1696 goto FORBIDDEN; // protect listing cgi-bin/
1697 sendCgi(url, prequest, length, cookie, content_type);
1699 if (prequest != request_GET)
1700 sendHeaders(HTTP_NOT_IMPLEMENTED);
1702 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1703 if (purl[-1] == '/')
1704 strcpy(purl, "index.html");
1705 if (stat(test, &sb) == 0) {
1706 config->ContentLength = sb.st_size;
1707 config->last_mod = sb.st_mtime;
1710 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1711 /* unset if non inetd looped */
1712 config->ContentLength = -1;
1715 #if ENABLE_FEATURE_HTTPD_CGI
1723 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1724 /* from inetd don't looping: freeing, closing automatic from exit always */
1726 fprintf(stderr, "closing socket\n");
1728 # ifdef CONFIG_FEATURE_HTTPD_CGI
1731 free(config->referer);
1732 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1733 free(config->remoteuser);
1736 #endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
1737 shutdown(a_c_w, SHUT_WR);
1739 /* Properly wait for remote to closed */
1741 FD_SET(a_c_r, &s_fd);
1746 retval = select(a_c_r + 1, &s_fd, NULL, NULL, &tv);
1747 } while (retval > 0 && read(a_c_r, buf, sizeof(config->buf) > 0));
1749 shutdown(a_c_r, SHUT_RD);
1750 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1751 close(config->accepted_socket);
1752 #endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
1755 /****************************************************************************
1757 > $Function: miniHttpd()
1759 * $Description: The main http server function.
1761 * Given an open socket fildes, listen for new connections and farm out
1762 * the processing as a forked process.
1765 * (int) server. . . The server socket fildes.
1767 * $Return: (int) . . . . Always 0.
1769 ****************************************************************************/
1770 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1771 static int miniHttpd(int server)
1773 fd_set readfd, portfd;
1776 FD_SET(server, &portfd);
1778 /* copy the ports we are watching to the readfd set */
1782 /* Now wait INDEFINITELY on the set of sockets! */
1783 if (select(server + 1, &readfd, 0, 0, 0) > 0) {
1784 if (FD_ISSET(server, &readfd)) {
1786 struct sockaddr_in fromAddr;
1788 socklen_t fromAddrLen = sizeof(fromAddr);
1789 int s = accept(server,
1790 (struct sockaddr *)&fromAddr, &fromAddrLen);
1795 config->accepted_socket = s;
1796 config->rmt_ip = ntohl(fromAddr.sin_addr.s_addr);
1797 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1798 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1799 (unsigned char)(config->rmt_ip >> 24),
1800 (unsigned char)(config->rmt_ip >> 16),
1801 (unsigned char)(config->rmt_ip >> 8),
1802 config->rmt_ip & 0xff);
1803 config->port = ntohs(fromAddr.sin_port);
1805 bb_error_msg("connection from IP=%s, port %u",
1806 config->rmt_ip_str, config->port);
1808 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1810 /* set the KEEPALIVE option to cull dead connections */
1812 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof(on));
1818 /* This is the spawned thread */
1819 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1820 /* protect reload config, may be confuse checking */
1821 signal(SIGHUP, SIG_IGN);
1838 static int miniHttpd(void)
1840 struct sockaddr_in fromAddrLen;
1841 socklen_t sinlen = sizeof(struct sockaddr_in);
1843 getpeername(0, (struct sockaddr *)&fromAddrLen, &sinlen);
1844 config->rmt_ip = ntohl(fromAddrLen.sin_addr.s_addr);
1845 #if ENABLE_FEATURE_HTTPD_CGI
1846 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1847 (unsigned char)(config->rmt_ip >> 24),
1848 (unsigned char)(config->rmt_ip >> 16),
1849 (unsigned char)(config->rmt_ip >> 8),
1850 config->rmt_ip & 0xff);
1852 config->port = ntohs(fromAddrLen.sin_port);
1856 #endif /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
1858 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1859 static void sighup_handler(int sig)
1862 struct sigaction sa;
1864 parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1865 sa.sa_handler = sighup_handler;
1866 sigemptyset(&sa.sa_mask);
1867 sa.sa_flags = SA_RESTART;
1868 sigaction(SIGHUP, &sa, NULL);
1872 enum httpd_opts_nums {
1873 c_opt_config_file = 0,
1876 USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
1877 USE_FEATURE_HTTPD_BASIC_AUTH(r_opt_realm,)
1878 USE_FEATURE_HTTPD_AUTH_MD5(m_opt_md5,)
1879 USE_FEATURE_HTTPD_SETUID(u_opt_setuid,)
1880 USE_FEATURE_HTTPD_WITHOUT_INETD(p_opt_port,)
1883 static const char httpd_opts[] = "c:d:h:"
1884 USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
1885 USE_FEATURE_HTTPD_BASIC_AUTH("r:")
1886 USE_FEATURE_HTTPD_AUTH_MD5("m:")
1887 USE_FEATURE_HTTPD_SETUID("u:")
1888 USE_FEATURE_HTTPD_WITHOUT_INETD("p:");
1890 #define OPT_CONFIG_FILE (1<<c_opt_config_file)
1891 #define OPT_DECODE_URL (1<<d_opt_decode_url)
1892 #define OPT_HOME_HTTPD (1<<h_opt_home_httpd)
1894 #define OPT_ENCODE_URL USE_FEATURE_HTTPD_ENCODE_URL_STR((1<<e_opt_encode_url)) \
1895 SKIP_FEATURE_HTTPD_ENCODE_URL_STR(0)
1897 #define OPT_REALM USE_FEATURE_HTTPD_BASIC_AUTH((1<<r_opt_realm)) \
1898 SKIP_FEATURE_HTTPD_BASIC_AUTH(0)
1900 #define OPT_MD5 USE_FEATURE_HTTPD_AUTH_MD5((1<<m_opt_md5)) \
1901 SKIP_FEATURE_HTTPD_AUTH_MD5(0)
1903 #define OPT_SETUID USE_FEATURE_HTTPD_SETUID((1<<u_opt_setuid)) \
1904 SKIP_FEATURE_HTTPD_SETUID(0)
1906 #define OPT_PORT USE_FEATURE_HTTPD_WITHOUT_INETD((1<<p_opt_port)) \
1907 SKIP_FEATURE_HTTPD_WITHOUT_INETD(0)
1910 int httpd_main(int argc, char *argv[])
1913 const char *home_httpd = home;
1914 char *url_for_decode;
1915 USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
1916 USE_FEATURE_HTTPD_WITHOUT_INETD(const char *s_port;)
1917 USE_FEATURE_HTTPD_WITHOUT_INETD(int server;)
1919 USE_FEATURE_HTTPD_SETUID(const char *s_uid;)
1920 USE_FEATURE_HTTPD_SETUID(long uid = -1;)
1922 USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
1924 config = xzalloc(sizeof(*config));
1925 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1926 config->realm = "Web Server Authentication";
1929 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1933 config->ContentLength = -1;
1935 opt = getopt32(argc, argv, httpd_opts,
1936 &(config->configFile), &url_for_decode, &home_httpd
1937 USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
1938 USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm))
1939 USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
1940 USE_FEATURE_HTTPD_SETUID(, &s_uid)
1941 USE_FEATURE_HTTPD_WITHOUT_INETD(, &s_port)
1944 if (opt & OPT_DECODE_URL) {
1945 printf("%s", decodeString(url_for_decode, 1));
1948 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
1949 if (opt & OPT_ENCODE_URL) {
1950 printf("%s", encodeString(url_for_encode));
1954 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
1955 if (opt & OPT_MD5) {
1956 puts(pw_encrypt(pass, "$1$"));
1960 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1962 config->port = bb_xgetlarg(s_port, 10, 1, 0xffff);
1963 #if ENABLE_FEATURE_HTTPD_SETUID
1964 if (opt & OPT_SETUID) {
1967 uid = strtol(s_uid, &e, 0);
1970 uid = bb_xgetpwnam(s_uid);
1977 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
1978 server = openServer();
1979 # ifdef CONFIG_FEATURE_HTTPD_SETUID
1980 /* drop privileges */
1986 #if ENABLE_FEATURE_HTTPD_CGI
1988 char *p = getenv("PATH");
1994 setenv("PATH", p, 1);
1995 # ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1996 addEnvPort("SERVER");
2001 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2004 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2007 #if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
2009 xdaemon(1, 0); /* don't change curent directory */
2011 return miniHttpd(server);