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.
93 #include <ctype.h> /* for isspace */
95 #include <stdlib.h> /* for malloc */
97 #include <unistd.h> /* for close */
99 #include <sys/types.h>
100 #include <sys/socket.h> /* for connect and socket*/
101 #include <netinet/in.h> /* for sockaddr_in */
102 #include <sys/time.h>
103 #include <sys/stat.h>
104 #include <sys/wait.h>
105 #include <fcntl.h> /* for open modes */
109 static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
110 static const char default_path_httpd_conf[] = "/etc";
111 static const char httpd_conf[] = "httpd.conf";
112 static const char home[] = "./";
115 # define cont_l_fmt "%lld"
116 # define cont_l_type (long long)
118 # define cont_l_fmt "%ld"
119 # define cont_l_type (long)
124 // Note: busybox xfuncs are not used because we want the server to keep running
125 // if something bad happens due to a malformed user request.
126 // As a result, all memory allocation after daemonize
127 // is checked rigorously
131 /* Configure options, disabled by default as custom httpd feature */
133 /* disabled as optional features */
134 //#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
135 //#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
136 //#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
137 //#define CONFIG_FEATURE_HTTPD_SETUID
138 //#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
140 /* If set, use this server from internet superserver only */
141 //#define CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
143 /* You can use this server as standalone, require libbb.a for linking */
144 //#define HTTPD_STANDALONE
146 /* Config options, disable this for do very small module */
147 //#define CONFIG_FEATURE_HTTPD_CGI
148 //#define CONFIG_FEATURE_HTTPD_BASIC_AUTH
149 //#define CONFIG_FEATURE_HTTPD_AUTH_MD5
151 #ifdef HTTPD_STANDALONE
152 /* standalone, enable all features */
153 #undef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
154 /* unset config option for remove warning as redefined */
155 #undef CONFIG_FEATURE_HTTPD_BASIC_AUTH
156 #undef CONFIG_FEATURE_HTTPD_AUTH_MD5
157 #undef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
158 #undef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
159 #undef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
160 #undef CONFIG_FEATURE_HTTPD_CGI
161 #undef CONFIG_FEATURE_HTTPD_SETUID
162 #undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
163 /* enable all features now */
164 #define CONFIG_FEATURE_HTTPD_BASIC_AUTH
165 #define CONFIG_FEATURE_HTTPD_AUTH_MD5
166 #define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
167 #define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
168 #define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
169 #define CONFIG_FEATURE_HTTPD_CGI
170 #define CONFIG_FEATURE_HTTPD_SETUID
171 #define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
173 /* require from libbb.a for linking */
174 const char *bb_applet_name = "httpd";
176 void bb_show_usage(void)
178 fprintf(stderr, "Usage: %s [-p <port>] [-c configFile] [-d/-e <string>] "
179 "[-r realm] [-u user] [-h homedir]\n", bb_applet_name);
184 #ifdef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
185 #undef CONFIG_FEATURE_HTTPD_SETUID /* use inetd user.group config settings */
186 #undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP /* so is not daemon */
187 /* inetd set stderr to accepted socket and we can`t true see debug messages */
195 #define MAX_MEMORY_BUFF 8192 /* IO buffer */
197 typedef struct HT_ACCESS {
199 struct HT_ACCESS *next;
200 char before_colon[1]; /* really bigger, must last */
203 typedef struct HT_ACCESS_IP {
207 struct HT_ACCESS_IP *next;
212 char buf[MAX_MEMORY_BUFF];
214 USE_FEATURE_HTTPD_BASIC_AUTH(const char *realm;)
215 USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
219 USE_FEATURE_HTTPD_CGI(char *referer;)
221 const char *configFile;
224 #if defined(CONFIG_FEATURE_HTTPD_CGI) || DEBUG
225 char rmt_ip_str[16]; /* for set env REMOTE_ADDR */
227 unsigned port; /* server initial port and for
228 set env REMOTE_PORT */
230 const char *found_mime_type;
231 const char *found_moved_temporarily;
234 off_t ContentLength; /* -1 - unknown */
237 Htaccess_IP *ip_a_d; /* config allow/deny lines */
239 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
240 Htaccess *auth; /* config user:password lines */
242 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
243 Htaccess *mime_a; /* config mime types */
246 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
248 # define a_c_r config->accepted_socket
249 # define a_c_w config->accepted_socket
254 volatile int alarm_signaled;
256 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
257 Htaccess *script_i; /* config script interpreters */
261 static HttpdConfig *config;
263 static const char request_GET[] = "GET"; /* size algorithic optimize */
265 static const char* const suffixTable [] = {
266 /* Warning: shorted equivalent suffix in one line must be first */
267 ".htm.html", "text/html",
268 ".jpg.jpeg", "image/jpeg",
271 ".txt.h.c.cc.cpp", "text/plain",
274 ".avi", "video/x-msvideo",
275 ".qt.mov", "video/quicktime",
276 ".mpe.mpeg", "video/mpeg",
277 ".mid.midi", "audio/midi",
278 ".mp3", "audio/mpeg",
279 #if 0 /* unpopular */
280 ".au", "audio/basic",
281 ".pac", "application/x-ns-proxy-autoconfig",
282 ".vrml.wrl", "model/vrml",
284 0, "application/octet-stream" /* default */
290 HTTP_MOVED_TEMPORARILY = 302,
291 HTTP_BAD_REQUEST = 400, /* malformed syntax */
292 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
293 HTTP_NOT_FOUND = 404,
294 HTTP_FORBIDDEN = 403,
295 HTTP_REQUEST_TIMEOUT = 408,
296 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
297 HTTP_INTERNAL_SERVER_ERROR = 500,
298 #if 0 /* future use */
300 HTTP_SWITCHING_PROTOCOLS = 101,
303 HTTP_NON_AUTHORITATIVE_INFO = 203,
304 HTTP_NO_CONTENT = 204,
305 HTTP_MULTIPLE_CHOICES = 300,
306 HTTP_MOVED_PERMANENTLY = 301,
307 HTTP_NOT_MODIFIED = 304,
308 HTTP_PAYMENT_REQUIRED = 402,
309 HTTP_BAD_GATEWAY = 502,
310 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
311 HTTP_RESPONSE_SETSIZE=0xffffffff
317 HttpResponseNum type;
322 static const HttpEnumString httpResponseNames[] = {
323 { HTTP_OK, "OK", NULL },
324 { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
325 { HTTP_REQUEST_TIMEOUT, "Request Timeout",
326 "No request appeared within a reasonable time period." },
327 { HTTP_NOT_IMPLEMENTED, "Not Implemented",
328 "The requested method is not recognized by this server." },
329 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
330 { HTTP_UNAUTHORIZED, "Unauthorized", "" },
332 { HTTP_NOT_FOUND, "Not Found",
333 "The requested URL was not found on this server." },
334 { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
335 { HTTP_FORBIDDEN, "Forbidden", "" },
336 { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
337 "Internal Server Error" },
338 #if 0 /* not implemented */
339 { HTTP_CREATED, "Created" },
340 { HTTP_ACCEPTED, "Accepted" },
341 { HTTP_NO_CONTENT, "No Content" },
342 { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
343 { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
344 { HTTP_NOT_MODIFIED, "Not Modified" },
345 { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
346 { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
351 static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
352 static const char Content_length[] = "Content-length:";
356 scan_ip (const char **ep, unsigned int *ip, unsigned char endc)
363 for (j = 0; j < 4; j++) {
366 if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
369 while (*p >= '0' && *p <= '9') {
378 if (*p != '/' && *p != 0)
380 *ip = ((*ip) << 8) | octet;
394 scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask)
399 i = scan_ip(&ipm, ip, '/');
407 if (*p < '0' || *p > '9') {
409 i = scan_ip (&ipm, mask, 0);
431 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES)
432 static void free_config_lines(Htaccess **pprev)
434 Htaccess *prev = *pprev;
437 Htaccess *cur = prev;
447 #define FIRST_PARSE 0
448 #define SUBDIR_PARSE 1
449 #define SIGNALED_PARSE 2
450 #define FIND_FROM_HTTPD_ROOT 3
451 /****************************************************************************
453 > $Function: parse_conf()
455 * $Description: parse configuration file into in-memory linked list.
457 * The first non-white character is examined to determine if the config line
458 * is one of the following:
459 * .ext:mime/type # new mime type not compiled into httpd
460 * [adAD]:from # ip address allow/deny, * for wildcard
461 * /path:user:pass # username/password
463 * Any previous IP rules are discarded.
464 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
465 * are also discarded. That is, previous settings are retained if flag is
469 * (const char *) path . . null for ip address checks, path for password
471 * (int) flag . . . . . . the source of the parse request.
475 ****************************************************************************/
476 static void parse_conf(const char *path, int flag)
479 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
480 Htaccess *prev, *cur;
481 #elif CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
485 const char *cf = config->configFile;
490 /* free previous ip setup if present */
491 Htaccess_IP *pip = config->ip_a_d;
494 Htaccess_IP *cur_ipl = pip;
499 config->ip_a_d = NULL;
501 config->flg_deny_all = 0;
503 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR)
504 /* retain previous auth and mime config only for subdir parse */
505 if(flag != SUBDIR_PARSE) {
506 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
507 free_config_lines(&config->auth);
509 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
510 free_config_lines(&config->mime_a);
512 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
513 free_config_lines(&config->script_i);
518 if(flag == SUBDIR_PARSE || cf == NULL) {
519 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
521 if(flag == FIRST_PARSE)
522 bb_error_msg_and_die(bb_msg_memory_exhausted);
525 sprintf((char *)cf, "%s/%s", path, httpd_conf);
528 while((f = fopen(cf, "r")) == NULL) {
529 if(flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
530 /* config file not found, no changes to config */
533 if(config->configFile && flag == FIRST_PARSE) /* if -c option given */
534 bb_perror_msg_and_die("%s", cf);
535 flag = FIND_FROM_HTTPD_ROOT;
539 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
542 /* This could stand some work */
543 while ( (p0 = fgets(buf, sizeof(buf), f)) != NULL) {
545 for(p = p0; *p0 != 0 && *p0 != '#'; p0++) {
548 if(*p0 == ':' && c == NULL)
554 /* test for empty or strange line */
555 if (c == NULL || *c == 0)
562 /* memorize deny all */
563 config->flg_deny_all++;
565 /* skip default other "word:*" config lines */
571 else if(*p0 != 'D' && *p0 != 'A'
572 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
575 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
578 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
583 if(*p0 == 'A' || *p0 == 'D') {
584 /* storing current config IP line */
585 pip = calloc(1, sizeof(Htaccess_IP));
587 if(scan_ip_mask (c, &(pip->ip), &(pip->mask))) {
588 /* syntax IP{/mask} error detected, protect all */
592 pip->allow_deny = *p0;
594 /* Deny:form_IP move top */
595 pip->next = config->ip_a_d;
596 config->ip_a_d = pip;
598 /* add to bottom A:form_IP config line */
599 Htaccess_IP *prev_IP = config->ip_a_d;
601 if(prev_IP == NULL) {
602 config->ip_a_d = pip;
605 prev_IP = prev_IP->next;
612 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
614 /* make full path from httpd root / curent_path / config_line_path */
615 cf = flag == SUBDIR_PARSE ? path : "";
616 p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
620 sprintf(p0, "/%s%s", cf, buf);
622 /* another call bb_simplify_path */
627 if (*cf == '/') { /* skip duplicate (or initial) slash */
629 } else if (*cf == '.') {
630 if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
632 } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
635 while (*--p != '/'); /* omit previous dir */
644 if ((p == p0) || (*p != '/')) { /* not a trailing slash */
645 ++p; /* so keep last character */
648 sprintf(p0, "%s:%s", p0, c);
652 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR)
653 /* storing current config line */
654 cur = calloc(1, sizeof(Htaccess) + strlen(p0));
656 cf = strcpy(cur->before_colon, p0);
659 cur->after_colon = c;
660 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
662 /* config .mime line move top for overwrite previous */
663 cur->next = config->mime_a;
664 config->mime_a = cur;
668 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
669 if(*cf == '*' && cf[1] == '.') {
670 /* config script interpreter line move top for overwrite previous */
671 cur->next = config->script_i;
672 config->script_i = cur;
676 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
680 config->auth = prev = cur;
682 /* sort path, if current lenght eq or bigger then move up */
683 Htaccess *prev_hti = config->auth;
684 size_t l = strlen(cf);
687 for(hti = prev_hti; hti; hti = hti->next) {
688 if(l >= strlen(hti->before_colon)) {
689 /* insert before hti */
691 if(prev_hti != hti) {
692 prev_hti->next = cur;
700 prev_hti = prev_hti->next;
702 if(!hti) { /* not inserted, add to bottom */
714 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
715 /****************************************************************************
717 > $Function: encodeString()
719 * $Description: Given a string, html encode special characters.
720 * This is used for the -e command line option to provide an easy way
721 * for scripts to encode result data without confusing browsers. The
722 * returned string pointer is memory allocated by malloc().
725 * (const char *) string . . The first string to encode.
727 * $Return: (char *) . . . .. . . A pointer to the encoded string.
729 * $Errors: Returns a null string ("") if memory is not available.
731 ****************************************************************************/
732 static char *encodeString(const char *string)
734 /* take the simple route and encode everything */
735 /* could possibly scan once to get length. */
736 int len = strlen(string);
737 char *out = malloc(len * 6 + 1);
742 while ((ch = *string++)) {
743 // very simple check for what to encode
744 if (isalnum(ch)) *p++ = ch;
745 else p += sprintf(p, "&#%d;", (unsigned char) ch);
750 #endif /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */
752 /****************************************************************************
754 > $Function: decodeString()
756 * $Description: Given a URL encoded string, convert it to plain ascii.
757 * Since decoding always makes strings smaller, the decode is done in-place.
758 * Thus, callers should strdup() the argument if they do not want the
759 * argument modified. The return is the original pointer, allowing this
760 * function to be easily used as arguments to other functions.
763 * (char *) string . . . The first string to decode.
764 * (int) flag . . . 1 if require decode '+' as ' ' for CGI
766 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
770 ****************************************************************************/
771 static char *decodeString(char *orig, int flag_plus_to_space)
773 /* note that decoded string is always shorter than original */
779 if (*ptr == '+' && flag_plus_to_space) { *string++ = ' '; ptr++; }
780 else if (*ptr != '%') *string++ = *ptr++;
782 unsigned int value1, value2;
785 if(sscanf(ptr, "%1X", &value1) != 1 ||
786 sscanf(ptr+1, "%1X", &value2) != 1) {
787 if(!flag_plus_to_space)
791 value1 = value1 * 16 + value2;
792 if(value1 == '/' || value1 == 0)
804 #ifdef CONFIG_FEATURE_HTTPD_CGI
805 /****************************************************************************
807 > $Function: addEnv()
809 * $Description: Add an environment variable setting to the global list.
810 * A NAME=VALUE string is allocated, filled, and added to the list of
811 * environment settings passed to the cgi execution script.
814 * (char *) name_before_underline - The first part environment variable name.
815 * (char *) name_after_underline - The second part environment variable name.
816 * (char *) value . . The value to which the env variable is set.
820 * $Errors: Silently returns if the env runs out of space to hold the new item
822 ****************************************************************************/
823 static void addEnv(const char *name_before_underline,
824 const char *name_after_underline, const char *value)
827 const char *underline;
831 underline = *name_after_underline ? "_" : "";
832 asprintf(&s, "%s%s%s=%s", name_before_underline, underline,
833 name_after_underline, value);
839 #if defined(CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV) || !defined(CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY)
840 /* set environs SERVER_PORT and REMOTE_PORT */
841 static void addEnvPort(const char *port_name)
845 sprintf(buf, "%u", config->port);
846 addEnv(port_name, "PORT", buf);
849 #endif /* CONFIG_FEATURE_HTTPD_CGI */
852 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
853 /****************************************************************************
855 > $Function: decodeBase64()
857 > $Description: Decode a base 64 data stream as per rfc1521.
858 * Note that the rfc states that none base64 chars are to be ignored.
859 * Since the decode always results in a shorter size than the input, it is
860 * OK to pass the input arg as an output arg.
863 * (char *) Data . . . . A pointer to a base64 encoded string.
864 * Where to place the decoded data.
870 ****************************************************************************/
871 static void decodeBase64(char *Data)
874 const unsigned char *in = (const unsigned char *)Data;
875 // The decoded size will be at most 3/4 the size of the encoded
876 unsigned long ch = 0;
882 if(t >= '0' && t <= '9')
884 else if(t >= 'A' && t <= 'Z')
886 else if(t >= 'a' && t <= 'z')
900 *Data++ = (char) (ch >> 16);
901 *Data++ = (char) (ch >> 8);
911 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
912 /****************************************************************************
914 > $Function: openServer()
916 * $Description: create a listen server socket on the designated port.
918 * $Return: (int) . . . A connection socket. -1 for errors.
922 ****************************************************************************/
923 static int openServer(void)
925 struct sockaddr_in lsocket;
928 /* create the socket right now */
929 /* inet_addr() returns a value that is already in network order */
930 memset(&lsocket, 0, sizeof(lsocket));
931 lsocket.sin_family = AF_INET;
932 lsocket.sin_addr.s_addr = INADDR_ANY;
933 lsocket.sin_port = htons(config->port);
934 fd = bb_xsocket(AF_INET, SOCK_STREAM, 0);
935 /* tell the OS it's OK to reuse a previous address even though */
936 /* it may still be in a close down state. Allows bind to succeed. */
939 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ;
941 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ;
943 bb_xbind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket));
944 listen(fd, 9); /* bb_xlisten? */
945 signal(SIGCHLD, SIG_IGN); /* prevent zombie (defunct) processes */
948 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
950 /****************************************************************************
952 > $Function: sendHeaders()
954 * $Description: Create and send HTTP response headers.
955 * The arguments are combined and sent as one write operation. Note that
956 * IE will puke big-time if the headers are not sent in one packet and the
957 * second packet is delayed for any reason.
960 * (HttpResponseNum) responseNum . . . The result code to send.
962 * $Return: (int) . . . . writing errors
964 ****************************************************************************/
965 static int sendHeaders(HttpResponseNum responseNum)
967 char *buf = config->buf;
968 const char *responseString = "";
969 const char *infoString = 0;
970 const char *mime_type;
972 time_t timer = time(0);
977 i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
978 if (httpResponseNames[i].type == responseNum) {
979 responseString = httpResponseNames[i].name;
980 infoString = httpResponseNames[i].info;
984 /* error message is HTML */
985 mime_type = responseNum == HTTP_OK ?
986 config->httpd_found.found_mime_type : "text/html";
988 /* emit the current date */
989 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
991 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
992 "Date: %s\r\nConnection: close\r\n",
993 responseNum, responseString, mime_type, timeStr);
995 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
996 if (responseNum == HTTP_UNAUTHORIZED) {
997 len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
1001 if(responseNum == HTTP_MOVED_TEMPORARILY) {
1002 len += sprintf(buf+len, "Location: %s/%s%s\r\n",
1003 config->httpd_found.found_moved_temporarily,
1004 (config->query ? "?" : ""),
1005 (config->query ? config->query : ""));
1008 if (config->ContentLength != -1) { /* file */
1009 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
1010 len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n",
1011 timeStr, Content_length, cont_l_type config->ContentLength);
1013 strcat(buf, "\r\n");
1016 len += sprintf(buf+len,
1017 "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
1018 "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
1019 responseNum, responseString,
1020 responseNum, responseString, infoString);
1023 fprintf(stderr, "Headers: '%s'", buf);
1025 return bb_full_write(a_c_w, buf, len);
1028 /****************************************************************************
1030 > $Function: getLine()
1032 * $Description: Read from the socket until an end of line char found.
1034 * Characters are read one at a time until an eol sequence is found.
1036 * $Return: (int) . . . . number of characters read. -1 if error.
1038 ****************************************************************************/
1039 static int getLine(void)
1042 char *buf = config->buf;
1044 while (read(a_c_r, buf + count, 1) == 1) {
1045 if (buf[count] == '\r') continue;
1046 if (buf[count] == '\n') {
1050 if(count < (MAX_MEMORY_BUFF-1)) /* check owerflow */
1053 if (count) return count;
1057 #ifdef CONFIG_FEATURE_HTTPD_CGI
1058 /****************************************************************************
1060 > $Function: sendCgi()
1062 * $Description: Execute a CGI script and send it's stdout back
1064 * Environment variables are set up and the script is invoked with pipes
1065 * for stdin/stdout. If a post is being done the script is fed the POST
1066 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1069 * (const char *) url . . . . . . The requested URL (with leading /).
1070 * (int bodyLen) . . . . . . . . Length of the post body.
1071 * (const char *cookie) . . . . . For set HTTP_COOKIE.
1072 * (const char *content_type) . . For set CONTENT_TYPE.
1075 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
1079 ****************************************************************************/
1080 static int sendCgi(const char *url,
1081 const char *request, int bodyLen, const char *cookie,
1082 const char *content_type)
1084 int fromCgi[2]; /* pipe for reading data from CGI */
1085 int toCgi[2]; /* pipe for sending data to CGI */
1087 static char * argp[] = { 0, 0 };
1094 if (pipe(fromCgi) != 0) {
1097 if (pipe(toCgi) != 0) {
1110 char *purl = strdup( url );
1111 char realpath_buff[MAXPATHLEN];
1119 dup2(inFd, 0); // replace stdin with the pipe
1120 dup2(outFd, 1); // replace stdout with the pipe
1122 dup2(outFd, 2); // replace stderr with the pipe
1133 while((script = strchr( script + 1, '/' )) != NULL) {
1134 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1138 if(is_directory(purl + 1, 1, &sb) == 0) {
1139 /* not directory, found script.cgi/PATH_INFO */
1143 *script = '/'; /* is directory, find next '/' */
1145 addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */
1146 addEnv("PATH", "", getenv("PATH"));
1147 addEnv("REQUEST", "METHOD", request);
1149 char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1151 sprintf(uri, "%s?%s", purl, config->query);
1152 addEnv("REQUEST", "URI", uri);
1154 addEnv("REQUEST", "URI", purl);
1157 *script = '\0'; /* reduce /PATH_INFO */
1158 /* SCRIPT_FILENAME required by PHP in CGI mode */
1159 if(realpath(purl + 1, realpath_buff))
1160 addEnv("SCRIPT", "FILENAME", realpath_buff);
1163 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1164 addEnv("SCRIPT_NAME", "", purl);
1165 addEnv("QUERY_STRING", "", config->query);
1166 addEnv("SERVER", "SOFTWARE", httpdVersion);
1167 addEnv("SERVER", "PROTOCOL", "HTTP/1.0");
1168 addEnv("GATEWAY_INTERFACE", "", "CGI/1.1");
1169 addEnv("REMOTE", "ADDR", config->rmt_ip_str);
1170 #ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1171 addEnvPort("REMOTE");
1176 sprintf(sbl, "%d", bodyLen);
1177 addEnv("CONTENT", "LENGTH", sbl);
1180 addEnv("HTTP", "COOKIE", cookie);
1182 addEnv("CONTENT", "TYPE", content_type);
1183 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1184 if(config->remoteuser) {
1185 addEnv("REMOTE", "USER", config->remoteuser);
1186 addEnv("AUTH_TYPE", "", "Basic");
1190 addEnv("HTTP", "REFERER", config->referer);
1192 /* set execve argp[0] without path */
1193 argp[0] = strrchr( purl, '/' ) + 1;
1194 /* but script argp[0] must have absolute path and chdiring to this */
1195 if(*realpath_buff) {
1196 script = strrchr(realpath_buff, '/');
1199 if(chdir(realpath_buff) == 0) {
1200 // now run the program. If it fails,
1201 // use _exit() so no destructors
1202 // get called and make a mess.
1203 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1204 char *interpr = NULL;
1205 char *suffix = strrchr(purl, '.');
1209 for (cur = config->script_i; cur; cur = cur->next)
1210 if(strcmp(cur->before_colon + 1, suffix) == 0) {
1211 interpr = cur->after_colon;
1217 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1219 execv(interpr, argp);
1222 execv(realpath_buff, argp);
1226 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1227 config->accepted_socket = 1; /* send to stdout */
1229 sendHeaders(HTTP_NOT_FOUND);
1236 /* parent process */
1238 size_t post_readed_size = 0, post_readed_idx = 0;
1244 signal(SIGPIPE, SIG_IGN);
1255 FD_SET(inFd, &readSet);
1256 if(bodyLen > 0 || post_readed_size > 0) {
1257 FD_SET(outFd, &writeSet);
1258 nfound = outFd > inFd ? outFd : inFd;
1259 if(post_readed_size == 0) {
1260 FD_SET(a_c_r, &readSet);
1264 /* Now wait on the set of sockets! */
1265 nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
1271 nfound = select(inFd + 1, &readSet, 0, 0, NULL);
1275 if (waitpid(pid, &status, WNOHANG) > 0) {
1278 if (WIFEXITED(status))
1279 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1280 if (WIFSIGNALED(status))
1281 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1285 } else if(post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
1286 count = bb_full_write(outFd, wbuf + post_readed_idx, post_readed_size);
1288 post_readed_size -= count;
1289 post_readed_idx += count;
1290 if(post_readed_size == 0)
1291 post_readed_idx = 0;
1293 post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
1295 } else if(bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
1296 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1297 count = safe_read(a_c_r, wbuf, count);
1299 post_readed_size += count;
1302 bodyLen = 0; /* closed */
1305 if(FD_ISSET(inFd, &readSet)) {
1307 char *rbuf = config->buf;
1310 # define PIPESIZE 4096 /* amount of buffering in a pipe */
1312 # define PIPESIZE PIPE_BUF
1314 #if PIPESIZE >= MAX_MEMORY_BUFF
1315 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1318 // There is something to read
1319 count = safe_read(inFd, rbuf, PIPESIZE);
1325 /* check to see if the user script added headers */
1326 if(strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
1327 bb_full_write(s, "HTTP/1.0 200 OK\r\n", 17);
1329 if (strstr(rbuf, "ontent-") == 0) {
1330 bb_full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1334 if (bb_full_write(s, rbuf, count) != count)
1338 fprintf(stderr, "cgi read %d bytes\n", count);
1346 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1348 /****************************************************************************
1350 > $Function: sendFile()
1352 * $Description: Send a file response to an HTTP request
1355 * (const char *) url . . The URL requested.
1357 * $Return: (int) . . . . . . Always 0.
1359 ****************************************************************************/
1360 static int sendFile(const char *url)
1364 const char * const * table;
1365 const char * try_suffix;
1367 suffix = strrchr(url, '.');
1369 for (table = suffixTable; *table; table += 2)
1370 if(suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1371 try_suffix += strlen(suffix);
1372 if(*try_suffix == 0 || *try_suffix == '.')
1375 /* also, if not found, set default as "application/octet-stream"; */
1376 config->httpd_found.found_mime_type = *(table+1);
1377 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1381 for (cur = config->mime_a; cur; cur = cur->next) {
1382 if(strcmp(cur->before_colon, suffix) == 0) {
1383 config->httpd_found.found_mime_type = cur->after_colon;
1388 #endif /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1391 fprintf(stderr, "Sending file '%s' Content-type: %s\n",
1392 url, config->httpd_found.found_mime_type);
1395 f = open(url, O_RDONLY);
1398 char *buf = config->buf;
1400 sendHeaders(HTTP_OK);
1401 while ((count = bb_full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1402 if (bb_full_write(a_c_w, buf, count) != count)
1408 bb_perror_msg("Unable to open '%s'", url);
1410 sendHeaders(HTTP_NOT_FOUND);
1416 static int checkPermIP(void)
1420 /* This could stand some work */
1421 for (cur = config->ip_a_d; cur; cur = cur->next) {
1423 fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1424 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1425 (unsigned char)(cur->ip >> 24),
1426 (unsigned char)(cur->ip >> 16),
1427 (unsigned char)(cur->ip >> 8),
1429 (unsigned char)(cur->mask >> 24),
1430 (unsigned char)(cur->mask >> 16),
1431 (unsigned char)(cur->mask >> 8),
1434 if((config->rmt_ip & cur->mask) == cur->ip)
1435 return cur->allow_deny == 'A'; /* Allow/Deny */
1438 /* if unconfigured, return 1 - access from all */
1439 return !config->flg_deny_all;
1442 /****************************************************************************
1444 > $Function: checkPerm()
1446 * $Description: Check the permission file for access password protected.
1448 * If config file isn't present, everything is allowed.
1449 * Entries are of the form you can see example from header source
1452 * (const char *) path . . . . The file path.
1453 * (const char *) request . . . User information to validate.
1455 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1457 ****************************************************************************/
1459 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1460 static int checkPerm(const char *path, const char *request)
1466 const char *prev = NULL;
1468 /* This could stand some work */
1469 for (cur = config->auth; cur; cur = cur->next) {
1470 p0 = cur->before_colon;
1471 if(prev != NULL && strcmp(prev, p0) != 0)
1472 continue; /* find next identical */
1473 p = cur->after_colon;
1475 fprintf(stderr,"checkPerm: '%s' ? '%s'\n", p0, request);
1478 size_t l = strlen(p0);
1480 if(strncmp(p0, path, l) == 0 &&
1481 (l == 1 || path[l] == '/' || path[l] == 0)) {
1483 /* path match found. Check request */
1484 /* for check next /path:user:password */
1486 u = strchr(request, ':');
1488 /* bad request, ':' required */
1492 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1497 if(strncmp(p, request, u-request) != 0) {
1498 /* user uncompared */
1501 pp = strchr(p, ':');
1502 if(pp && pp[1] == '$' && pp[2] == '1' &&
1503 pp[3] == '$' && pp[4]) {
1505 cipher = pw_encrypt(u+1, pp);
1506 if (strcmp(cipher, pp) == 0)
1507 goto set_remoteuser_var; /* Ok */
1513 if (strcmp(p, request) == 0) {
1514 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1517 config->remoteuser = strdup(request);
1518 if(config->remoteuser)
1519 config->remoteuser[(u - request)] = 0;
1527 return prev == NULL;
1530 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1532 /****************************************************************************
1534 > $Function: handle_sigalrm()
1536 * $Description: Handle timeouts
1538 ****************************************************************************/
1541 handle_sigalrm( int sig )
1543 sendHeaders(HTTP_REQUEST_TIMEOUT);
1544 config->alarm_signaled = sig;
1547 /****************************************************************************
1549 > $Function: handleIncoming()
1551 * $Description: Handle an incoming http request.
1553 ****************************************************************************/
1554 static void handleIncoming(void)
1556 char *buf = config->buf;
1563 #ifdef CONFIG_FEATURE_HTTPD_CGI
1564 const char *prequest = request_GET;
1567 char *content_type = 0;
1572 struct sigaction sa;
1574 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1575 int credentials = -1; /* if not requred this is Ok */
1578 sa.sa_handler = handle_sigalrm;
1579 sigemptyset(&sa.sa_mask);
1580 sa.sa_flags = 0; /* no SA_RESTART */
1581 sigaction(SIGALRM, &sa, NULL);
1586 (void) alarm( TIMEOUT );
1590 purl = strpbrk(buf, " \t");
1593 sendHeaders(HTTP_BAD_REQUEST);
1597 #ifdef CONFIG_FEATURE_HTTPD_CGI
1598 if(strcasecmp(buf, prequest) != 0) {
1600 if(strcasecmp(buf, prequest) != 0) {
1601 sendHeaders(HTTP_NOT_IMPLEMENTED);
1606 if(strcasecmp(buf, request_GET) != 0) {
1607 sendHeaders(HTTP_NOT_IMPLEMENTED);
1612 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1614 if (count < 1 || buf[0] != '/') {
1615 /* Garbled request/URL */
1618 url = alloca(strlen(buf) + 12); /* + sizeof("/index.html\0") */
1620 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1624 /* extract url args if present */
1625 test = strchr(url, '?');
1628 config->query = test;
1631 test = decodeString(url, 0);
1634 if(test == (buf+1)) {
1635 sendHeaders(HTTP_NOT_FOUND);
1638 /* algorithm stolen from libbb bb_simplify_path(),
1639 but don`t strdup and reducing trailing slash and protect out root */
1644 if (*test == '/') { /* skip duplicate (or initial) slash */
1646 } else if (*test == '.') {
1647 if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
1649 } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
1652 /* protect out root */
1655 while (*--purl != '/'); /* omit previous dir */
1663 *++purl = 0; /* so keep last character */
1664 test = purl; /* end ptr */
1666 /* If URL is directory, adding '/' */
1667 if(test[-1] != '/') {
1668 if ( is_directory(url + 1, 1, &sb) ) {
1669 config->httpd_found.found_moved_temporarily = url;
1673 fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1677 ip_allowed = checkPermIP();
1678 while(ip_allowed && (test = strchr( test + 1, '/' )) != NULL) {
1679 /* have path1/path2 */
1681 if( is_directory(url + 1, 1, &sb) ) {
1682 /* may be having subdir config */
1683 parse_conf(url + 1, SUBDIR_PARSE);
1684 ip_allowed = checkPermIP();
1689 // read until blank line for HTTP version specified, else parse immediate
1697 fprintf(stderr, "Header: '%s'\n", buf);
1700 #ifdef CONFIG_FEATURE_HTTPD_CGI
1701 /* try and do our best to parse more lines */
1702 if ((strncasecmp(buf, Content_length, 15) == 0)) {
1703 if(prequest != request_GET)
1704 length = strtol(buf + 15, 0, 0); // extra read only for POST
1705 } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
1706 for(test = buf + 7; isspace(*test); test++)
1708 cookie = strdup(test);
1709 } else if ((strncasecmp(buf, "Content-Type:", 13) == 0)) {
1710 for(test = buf + 13; isspace(*test); test++)
1712 content_type = strdup(test);
1713 } else if ((strncasecmp(buf, "Referer:", 8) == 0)) {
1714 for(test = buf + 8; isspace(*test); test++)
1716 config->referer = strdup(test);
1720 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1721 if (strncasecmp(buf, "Authorization:", 14) == 0) {
1722 /* We only allow Basic credentials.
1723 * It shows up as "Authorization: Basic <userid:password>" where
1724 * the userid:password is base64 encoded.
1726 for(test = buf + 14; isspace(*test); test++)
1728 if (strncasecmp(test, "Basic", 5) != 0)
1731 test += 5; /* decodeBase64() skiping space self */
1733 credentials = checkPerm(url, test);
1735 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1737 } /* while extra header reading */
1740 if(config->alarm_signaled)
1743 if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1744 /* protect listing [/path]/httpd_conf or IP deny */
1745 #ifdef CONFIG_FEATURE_HTTPD_CGI
1746 FORBIDDEN: /* protect listing /cgi-bin */
1748 sendHeaders(HTTP_FORBIDDEN);
1752 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1753 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1754 sendHeaders(HTTP_UNAUTHORIZED);
1759 if(config->httpd_found.found_moved_temporarily) {
1760 sendHeaders(HTTP_MOVED_TEMPORARILY);
1762 /* clear unforked memory flag */
1763 config->httpd_found.found_moved_temporarily = NULL;
1768 test = url + 1; /* skip first '/' */
1770 #ifdef CONFIG_FEATURE_HTTPD_CGI
1771 /* if strange Content-Length */
1775 if (strncmp(test, "cgi-bin", 7) == 0) {
1776 if(test[7] == '/' && test[8] == 0)
1777 goto FORBIDDEN; // protect listing cgi-bin/
1778 sendCgi(url, prequest, length, cookie, content_type);
1780 if (prequest != request_GET)
1781 sendHeaders(HTTP_NOT_IMPLEMENTED);
1783 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1785 strcpy(purl, "index.html");
1786 if ( stat(test, &sb ) == 0 ) {
1787 config->ContentLength = sb.st_size;
1788 config->last_mod = sb.st_mtime;
1791 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1792 /* unset if non inetd looped */
1793 config->ContentLength = -1;
1796 #ifdef CONFIG_FEATURE_HTTPD_CGI
1804 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1805 /* from inetd don`t looping: freeing, closing automatic from exit always */
1807 fprintf(stderr, "closing socket\n");
1809 # ifdef CONFIG_FEATURE_HTTPD_CGI
1812 free(config->referer);
1813 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1814 free(config->remoteuser);
1817 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1818 shutdown(a_c_w, SHUT_WR);
1820 /* Properly wait for remote to closed */
1822 FD_SET (a_c_r, &s_fd) ;
1827 retval = select (a_c_r + 1, &s_fd, NULL, NULL, &tv);
1828 } while (retval > 0 && (read (a_c_r, buf, sizeof (config->buf)) > 0));
1830 shutdown(a_c_r, SHUT_RD);
1831 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1832 close(config->accepted_socket);
1833 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1836 /****************************************************************************
1838 > $Function: miniHttpd()
1840 * $Description: The main http server function.
1842 * Given an open socket fildes, listen for new connections and farm out
1843 * the processing as a forked process.
1846 * (int) server. . . The server socket fildes.
1848 * $Return: (int) . . . . Always 0.
1850 ****************************************************************************/
1851 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1852 static int miniHttpd(int server)
1854 fd_set readfd, portfd;
1857 FD_SET(server, &portfd);
1859 /* copy the ports we are watching to the readfd set */
1863 /* Now wait INDEFINITELY on the set of sockets! */
1864 if (select(server + 1, &readfd, 0, 0, 0) > 0) {
1865 if (FD_ISSET(server, &readfd)) {
1867 struct sockaddr_in fromAddr;
1869 socklen_t fromAddrLen = sizeof(fromAddr);
1870 int s = accept(server,
1871 (struct sockaddr *)&fromAddr, &fromAddrLen);
1876 config->accepted_socket = s;
1877 config->rmt_ip = ntohl(fromAddr.sin_addr.s_addr);
1878 #if defined(CONFIG_FEATURE_HTTPD_CGI) || DEBUG
1879 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1880 (unsigned char)(config->rmt_ip >> 24),
1881 (unsigned char)(config->rmt_ip >> 16),
1882 (unsigned char)(config->rmt_ip >> 8),
1883 config->rmt_ip & 0xff);
1884 config->port = ntohs(fromAddr.sin_port);
1886 bb_error_msg("connection from IP=%s, port %u\n",
1887 config->rmt_ip_str, config->port);
1889 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1891 /* set the KEEPALIVE option to cull dead connections */
1893 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on));
1899 /* This is the spawned thread */
1900 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1901 /* protect reload config, may be confuse checking */
1902 signal(SIGHUP, SIG_IGN);
1919 static int miniHttpd(void)
1921 struct sockaddr_in fromAddrLen;
1922 socklen_t sinlen = sizeof (struct sockaddr_in);
1924 getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen);
1925 config->rmt_ip = ntohl(fromAddrLen.sin_addr.s_addr);
1926 #ifdef CONFIG_FEATURE_HTTPD_CGI
1927 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1928 (unsigned char)(config->rmt_ip >> 24),
1929 (unsigned char)(config->rmt_ip >> 16),
1930 (unsigned char)(config->rmt_ip >> 8),
1931 config->rmt_ip & 0xff);
1933 config->port = ntohs(fromAddrLen.sin_port);
1937 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1939 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1940 static void sighup_handler(int sig)
1943 struct sigaction sa;
1945 parse_conf(default_path_httpd_conf,
1946 sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1947 sa.sa_handler = sighup_handler;
1948 sigemptyset(&sa.sa_mask);
1949 sa.sa_flags = SA_RESTART;
1950 sigaction(SIGHUP, &sa, NULL);
1954 enum httpd_opts_nums {
1955 c_opt_config_file = 0,
1958 USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
1959 USE_FEATURE_HTTPD_BASIC_AUTH(r_opt_realm,)
1960 USE_FEATURE_HTTPD_AUTH_MD5(m_opt_md5,)
1961 USE_FEATURE_HTTPD_SETUID(u_opt_setuid,)
1962 SKIP_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY(p_opt_port,)
1965 static const char httpd_opts[]="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:")
1970 SKIP_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY("p:");
1972 #define OPT_CONFIG_FILE (1<<c_opt_config_file)
1973 #define OPT_DECODE_URL (1<<d_opt_decode_url)
1974 #define OPT_HOME_HTTPD (1<<h_opt_home_httpd)
1976 #define OPT_ENCODE_URL USE_FEATURE_HTTPD_ENCODE_URL_STR((1<<e_opt_encode_url)) \
1977 SKIP_FEATURE_HTTPD_ENCODE_URL_STR(0)
1979 #define OPT_REALM USE_FEATURE_HTTPD_BASIC_AUTH((1<<r_opt_realm)) \
1980 SKIP_FEATURE_HTTPD_BASIC_AUTH(0)
1982 #define OPT_MD5 USE_FEATURE_HTTPD_AUTH_MD5((1<<m_opt_md5)) \
1983 SKIP_FEATURE_HTTPD_AUTH_MD5(0)
1985 #define OPT_SETUID USE_FEATURE_HTTPD_SETUID((1<<u_opt_setuid)) \
1986 SKIP_FEATURE_HTTPD_SETUID(0)
1988 #define OPT_PORT SKIP_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY((1<<p_opt_port)) \
1989 USE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY(0)
1992 #ifdef HTTPD_STANDALONE
1993 int main(int argc, char *argv[])
1995 int httpd_main(int argc, char *argv[])
1999 const char *home_httpd = home;
2000 char *url_for_decode;
2001 USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
2002 SKIP_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY(const char *s_port;)
2003 SKIP_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY(int server;)
2005 USE_FEATURE_HTTPD_SETUID(const char *s_uid;)
2006 USE_FEATURE_HTTPD_SETUID(long uid = -1;)
2008 USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
2010 config = xcalloc(1, sizeof(*config));
2011 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
2012 config->realm = "Web Server Authentication";
2015 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2019 config->ContentLength = -1;
2021 opt = bb_getopt_ulflags(argc, argv, httpd_opts,
2022 &(config->configFile), &url_for_decode, &home_httpd
2023 USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
2024 USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm))
2025 USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
2026 USE_FEATURE_HTTPD_SETUID(, &s_uid)
2027 SKIP_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY(, &s_port)
2030 if(opt & OPT_DECODE_URL) {
2031 printf("%s", decodeString(url_for_decode, 1));
2034 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2035 if(opt & OPT_ENCODE_URL) {
2036 printf("%s", encodeString(url_for_encode));
2040 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2042 printf("%s\n", pw_encrypt(pass, "$1$"));
2046 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2048 config->port = bb_xgetlarg(s_port, 10, 1, 0xffff);
2049 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2050 if(opt & OPT_SETUID) {
2053 uid = strtol(s_uid, &e, 0);
2056 uid = bb_xgetpwnam(s_uid);
2062 bb_xchdir(home_httpd);
2063 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2064 server = openServer();
2065 # ifdef CONFIG_FEATURE_HTTPD_SETUID
2066 /* drop privileges */
2072 #ifdef CONFIG_FEATURE_HTTPD_CGI
2074 char *p = getenv("PATH");
2080 setenv("PATH", p, 1);
2081 # ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2082 addEnvPort("SERVER");
2087 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2090 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2093 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2095 bb_xdaemon(1, 0); /* don`t change curent directory */
2097 return miniHttpd(server);