2 * httpd implementation for busybox
4 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
5 * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
7 * simplify patch stolen from libbb without using strdup
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *****************************************************************************
27 * httpd -p 8080 -h $HOME/public_html
28 * or for daemon start from rc script with uid=0:
30 * This is equivalent if www user have uid=80 to
31 * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
34 * When a url contains "cgi-bin" it is assumed to be a cgi script. The
35 * server changes directory to the location of the script and executes it
36 * after setting QUERY_STRING and other environment variables.
38 * The server can also be invoked as a url arg decoder and html text encoder
40 * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
41 * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
42 * Note that url encoding for arguments is not the same as html encoding for
43 * presentation. -d decodes a url-encoded argument while -e encodes in html
46 * httpd.conf has the following format:
48 * A:172.20. # Allow address from 172.20.0.0/16
49 * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
50 * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
51 * A:127.0.0.1 # Allow local loopback connections
52 * D:* # Deny from other IP connections
53 * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
54 * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
55 * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
56 * .au:audio/basic # additional mime type for audio.au files
57 * *.php:/path/php # running cgi.php scripts through an interpreter
59 * A/D may be as a/d or allow/deny - first char case insensitive
60 * Deny IP rules take precedence over allow rules.
63 * The Deny/Allow IP logic:
65 * - Default is to allow all. No addresses are denied unless
66 * denied with a D: rule.
67 * - Order of Deny/Allow rules is significant
68 * - Deny rules take precedence over allow rules.
69 * - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
71 * - Specification of Allow all (A:*) is a no-op
74 * 1. Allow only specified addresses
75 * A:172.20 # Allow any address that begins with 172.20.
76 * A:10.10. # Allow any address that begins with 10.10.
77 * A:127.0.0.1 # Allow local loopback connections
78 * D:* # Deny from other IP connections
80 * 2. Only deny specified addresses
81 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
82 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
83 * A:* # (optional line added for clarity)
85 * If a sub directory contains a config file it is parsed and merged with
86 * any existing settings as if it was appended to the original configuration.
88 * subdir paths are relative to the containing subdir and thus cannot
89 * affect the parent rules.
91 * Note that since the sub dir is parsed in the forked thread servicing the
92 * subdir http request, any merge is discarded when the process exits. As a
93 * result, the subdir settings only have a lifetime of a single request.
96 * If -c is not set, an attempt will be made to open the default
97 * root configuration file. If -c is set and the file is not found, the
98 * server exits with an error.
104 #include <ctype.h> /* for isspace */
106 #include <stdlib.h> /* for malloc */
108 #include <unistd.h> /* for close */
110 #include <sys/types.h>
111 #include <sys/socket.h> /* for connect and socket*/
112 #include <netinet/in.h> /* for sockaddr_in */
113 #include <sys/time.h>
114 #include <sys/stat.h>
115 #include <sys/wait.h>
116 #include <fcntl.h> /* for open modes */
120 static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
121 static const char default_path_httpd_conf[] = "/etc";
122 static const char httpd_conf[] = "httpd.conf";
123 static const char home[] = "./";
126 # define cont_l_fmt "%lld"
127 # define cont_l_type (long long)
129 # define cont_l_fmt "%ld"
130 # define cont_l_type (long)
135 // Note: busybox xfuncs are not used because we want the server to keep running
136 // if something bad happens due to a malformed user request.
137 // As a result, all memory allocation after daemonize
138 // is checked rigorously
142 /* Configure options, disabled by default as custom httpd feature */
144 /* disabled as optional features */
145 //#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
146 //#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
147 //#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
148 //#define CONFIG_FEATURE_HTTPD_SETUID
149 //#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
151 /* If set, use this server from internet superserver only */
152 //#define CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
154 /* You can use this server as standalone, require libbb.a for linking */
155 //#define HTTPD_STANDALONE
157 /* Config options, disable this for do very small module */
158 //#define CONFIG_FEATURE_HTTPD_CGI
159 //#define CONFIG_FEATURE_HTTPD_BASIC_AUTH
160 //#define CONFIG_FEATURE_HTTPD_AUTH_MD5
162 #ifdef HTTPD_STANDALONE
163 /* standalone, enable all features */
164 #undef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
165 /* unset config option for remove warning as redefined */
166 #undef CONFIG_FEATURE_HTTPD_BASIC_AUTH
167 #undef CONFIG_FEATURE_HTTPD_AUTH_MD5
168 #undef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
169 #undef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
170 #undef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
171 #undef CONFIG_FEATURE_HTTPD_CGI
172 #undef CONFIG_FEATURE_HTTPD_SETUID
173 #undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
174 #undef ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
175 #undef ENABLE_FEATURE_HTTPD_BASIC_AUTH
176 #undef ENABLE_FEATURE_HTTPD_AUTH_MD5
177 #undef ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
178 #undef ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
179 #undef ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
180 #undef ENABLE_FEATURE_HTTPD_CGI
181 #undef ENABLE_FEATURE_HTTPD_SETUID
182 #undef ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
183 /* enable all features now */
184 #define CONFIG_FEATURE_HTTPD_BASIC_AUTH
185 #define CONFIG_FEATURE_HTTPD_AUTH_MD5
186 #define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
187 #define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
188 #define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
189 #define CONFIG_FEATURE_HTTPD_CGI
190 #define CONFIG_FEATURE_HTTPD_SETUID
191 #define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
192 #define ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY 0
193 #define ENABLE_FEATURE_HTTPD_BASIC_AUTH 1
194 #define ENABLE_FEATURE_HTTPD_AUTH_MD5 1
195 #define ENABLE_FEATURE_HTTPD_ENCODE_URL_STR 1
196 #define ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV 1
197 #define ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES 1
198 #define ENABLE_FEATURE_HTTPD_CGI 1
199 #define ENABLE_FEATURE_HTTPD_SETUID 1
200 #define ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP 1
202 /* require from libbb.a for linking */
203 const char *bb_applet_name = "httpd";
205 void bb_show_usage(void)
207 fprintf(stderr, "Usage: %s [-p <port>] [-c configFile] [-d/-e <string>] "
208 "[-r realm] [-u user] [-h homedir]\n", bb_applet_name);
213 #ifdef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
214 #undef CONFIG_FEATURE_HTTPD_SETUID /* use inetd user.group config settings */
215 #undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP /* so is not daemon */
216 /* inetd set stderr to accepted socket and we can`t true see debug messages */
224 #define MAX_MEMORY_BUFF 8192 /* IO buffer */
226 typedef struct HT_ACCESS {
228 struct HT_ACCESS *next;
229 char before_colon[1]; /* really bigger, must last */
232 typedef struct HT_ACCESS_IP {
236 struct HT_ACCESS_IP *next;
241 char buf[MAX_MEMORY_BUFF];
243 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
250 #ifdef CONFIG_FEATURE_HTTPD_CGI
254 const char *configFile;
257 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
258 char rmt_ip_str[16]; /* for set env REMOTE_ADDR */
260 unsigned port; /* server initial port and for
261 set env REMOTE_PORT */
263 const char *found_mime_type;
264 const char *found_moved_temporarily;
267 off_t ContentLength; /* -1 - unknown */
270 Htaccess_IP *ip_a_d; /* config allow/deny lines */
272 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
273 Htaccess *auth; /* config user:password lines */
275 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
276 Htaccess *mime_a; /* config mime types */
279 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
281 # define a_c_r config->accepted_socket
282 # define a_c_w config->accepted_socket
287 volatile int alarm_signaled;
289 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
290 Htaccess *script_i; /* config script interpreters */
294 static HttpdConfig *config;
296 static const char request_GET[] = "GET"; /* size algorithic optimize */
298 static const char* const suffixTable [] = {
299 /* Warning: shorted equivalent suffix in one line must be first */
300 ".htm.html", "text/html",
301 ".jpg.jpeg", "image/jpeg",
304 ".txt.h.c.cc.cpp", "text/plain",
307 ".avi", "video/x-msvideo",
308 ".qt.mov", "video/quicktime",
309 ".mpe.mpeg", "video/mpeg",
310 ".mid.midi", "audio/midi",
311 ".mp3", "audio/mpeg",
312 #if 0 /* unpopular */
313 ".au", "audio/basic",
314 ".pac", "application/x-ns-proxy-autoconfig",
315 ".vrml.wrl", "model/vrml",
317 0, "application/octet-stream" /* default */
323 HTTP_MOVED_TEMPORARILY = 302,
324 HTTP_BAD_REQUEST = 400, /* malformed syntax */
325 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
326 HTTP_NOT_FOUND = 404,
327 HTTP_FORBIDDEN = 403,
328 HTTP_REQUEST_TIMEOUT = 408,
329 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
330 HTTP_INTERNAL_SERVER_ERROR = 500,
331 #if 0 /* future use */
333 HTTP_SWITCHING_PROTOCOLS = 101,
336 HTTP_NON_AUTHORITATIVE_INFO = 203,
337 HTTP_NO_CONTENT = 204,
338 HTTP_MULTIPLE_CHOICES = 300,
339 HTTP_MOVED_PERMANENTLY = 301,
340 HTTP_NOT_MODIFIED = 304,
341 HTTP_PAYMENT_REQUIRED = 402,
342 HTTP_BAD_GATEWAY = 502,
343 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
344 HTTP_RESPONSE_SETSIZE=0xffffffff
350 HttpResponseNum type;
355 static const HttpEnumString httpResponseNames[] = {
356 { HTTP_OK, "OK", NULL },
357 { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
358 { HTTP_REQUEST_TIMEOUT, "Request Timeout",
359 "No request appeared within a reasonable time period." },
360 { HTTP_NOT_IMPLEMENTED, "Not Implemented",
361 "The requested method is not recognized by this server." },
362 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
363 { HTTP_UNAUTHORIZED, "Unauthorized", "" },
365 { HTTP_NOT_FOUND, "Not Found",
366 "The requested URL was not found on this server." },
367 { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
368 { HTTP_FORBIDDEN, "Forbidden", "" },
369 { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
370 "Internal Server Error" },
371 #if 0 /* not implemented */
372 { HTTP_CREATED, "Created" },
373 { HTTP_ACCEPTED, "Accepted" },
374 { HTTP_NO_CONTENT, "No Content" },
375 { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
376 { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
377 { HTTP_NOT_MODIFIED, "Not Modified" },
378 { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
379 { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
384 static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
385 static const char Content_length[] = "Content-length:";
389 scan_ip (const char **ep, unsigned int *ip, unsigned char endc)
396 for (j = 0; j < 4; j++) {
399 if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
402 while (*p >= '0' && *p <= '9') {
411 if (*p != '/' && *p != 0)
413 *ip = ((*ip) << 8) | octet;
427 scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask)
432 i = scan_ip(&ipm, ip, '/');
440 if (*p < '0' || *p > '9') {
442 i = scan_ip (&ipm, mask, 0);
464 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES)
465 static void free_config_lines(Htaccess **pprev)
467 Htaccess *prev = *pprev;
470 Htaccess *cur = prev;
480 #define FIRST_PARSE 0
481 #define SUBDIR_PARSE 1
482 #define SIGNALED_PARSE 2
483 #define FIND_FROM_HTTPD_ROOT 3
484 /****************************************************************************
486 > $Function: parse_conf()
488 * $Description: parse configuration file into in-memory linked list.
490 * The first non-white character is examined to determine if the config line
491 * is one of the following:
492 * .ext:mime/type # new mime type not compiled into httpd
493 * [adAD]:from # ip address allow/deny, * for wildcard
494 * /path:user:pass # username/password
496 * Any previous IP rules are discarded.
497 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
498 * are also discarded. That is, previous settings are retained if flag is
502 * (const char *) path . . null for ip address checks, path for password
504 * (int) flag . . . . . . the source of the parse request.
508 ****************************************************************************/
509 static void parse_conf(const char *path, int flag)
512 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
513 Htaccess *prev, *cur;
514 #elif CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
518 const char *cf = config->configFile;
523 /* free previous ip setup if present */
524 Htaccess_IP *pip = config->ip_a_d;
527 Htaccess_IP *cur_ipl = pip;
532 config->ip_a_d = NULL;
534 config->flg_deny_all = 0;
536 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR)
537 /* retain previous auth and mime config only for subdir parse */
538 if(flag != SUBDIR_PARSE) {
539 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
540 free_config_lines(&config->auth);
542 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
543 free_config_lines(&config->mime_a);
545 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
546 free_config_lines(&config->script_i);
551 if(flag == SUBDIR_PARSE || cf == NULL) {
552 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
554 if(flag == FIRST_PARSE)
555 bb_error_msg_and_die(bb_msg_memory_exhausted);
558 sprintf((char *)cf, "%s/%s", path, httpd_conf);
561 while((f = fopen(cf, "r")) == NULL) {
562 if(flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
563 /* config file not found, no changes to config */
566 if(config->configFile && flag == FIRST_PARSE) /* if -c option given */
567 bb_perror_msg_and_die("%s", cf);
568 flag = FIND_FROM_HTTPD_ROOT;
572 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
575 /* This could stand some work */
576 while ( (p0 = fgets(buf, sizeof(buf), f)) != NULL) {
578 for(p = p0; *p0 != 0 && *p0 != '#'; p0++) {
581 if(*p0 == ':' && c == NULL)
587 /* test for empty or strange line */
588 if (c == NULL || *c == 0)
595 /* memorize deny all */
596 config->flg_deny_all++;
598 /* skip default other "word:*" config lines */
604 else if(*p0 != 'D' && *p0 != 'A'
605 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
608 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
611 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
616 if(*p0 == 'A' || *p0 == 'D') {
617 /* storing current config IP line */
618 pip = calloc(1, sizeof(Htaccess_IP));
620 if(scan_ip_mask (c, &(pip->ip), &(pip->mask))) {
621 /* syntax IP{/mask} error detected, protect all */
625 pip->allow_deny = *p0;
627 /* Deny:form_IP move top */
628 pip->next = config->ip_a_d;
629 config->ip_a_d = pip;
631 /* add to bottom A:form_IP config line */
632 Htaccess_IP *prev_IP = config->ip_a_d;
634 if(prev_IP == NULL) {
635 config->ip_a_d = pip;
638 prev_IP = prev_IP->next;
645 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
647 /* make full path from httpd root / curent_path / config_line_path */
648 cf = flag == SUBDIR_PARSE ? path : "";
649 p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
653 sprintf(p0, "/%s%s", cf, buf);
655 /* another call bb_simplify_path */
660 if (*cf == '/') { /* skip duplicate (or initial) slash */
662 } else if (*cf == '.') {
663 if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
665 } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
668 while (*--p != '/'); /* omit previous dir */
677 if ((p == p0) || (*p != '/')) { /* not a trailing slash */
678 ++p; /* so keep last character */
681 sprintf(p0, "%s:%s", p0, c);
685 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR)
686 /* storing current config line */
687 cur = calloc(1, sizeof(Htaccess) + strlen(p0));
689 cf = strcpy(cur->before_colon, p0);
692 cur->after_colon = c;
693 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
695 /* config .mime line move top for overwrite previous */
696 cur->next = config->mime_a;
697 config->mime_a = cur;
701 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
702 if(*cf == '*' && cf[1] == '.') {
703 /* config script interpreter line move top for overwrite previous */
704 cur->next = config->script_i;
705 config->script_i = cur;
709 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
713 config->auth = prev = cur;
715 /* sort path, if current lenght eq or bigger then move up */
716 Htaccess *prev_hti = config->auth;
717 size_t l = strlen(cf);
720 for(hti = prev_hti; hti; hti = hti->next) {
721 if(l >= strlen(hti->before_colon)) {
722 /* insert before hti */
724 if(prev_hti != hti) {
725 prev_hti->next = cur;
733 prev_hti = prev_hti->next;
735 if(!hti) { /* not inserted, add to bottom */
747 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
748 /****************************************************************************
750 > $Function: encodeString()
752 * $Description: Given a string, html encode special characters.
753 * This is used for the -e command line option to provide an easy way
754 * for scripts to encode result data without confusing browsers. The
755 * returned string pointer is memory allocated by malloc().
758 * (const char *) string . . The first string to encode.
760 * $Return: (char *) . . . .. . . A pointer to the encoded string.
762 * $Errors: Returns a null string ("") if memory is not available.
764 ****************************************************************************/
765 static char *encodeString(const char *string)
767 /* take the simple route and encode everything */
768 /* could possibly scan once to get length. */
769 int len = strlen(string);
770 char *out = malloc(len * 6 + 1);
775 while ((ch = *string++)) {
776 // very simple check for what to encode
777 if (isalnum(ch)) *p++ = ch;
778 else p += sprintf(p, "&#%d;", (unsigned char) ch);
783 #endif /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */
785 /****************************************************************************
787 > $Function: decodeString()
789 * $Description: Given a URL encoded string, convert it to plain ascii.
790 * Since decoding always makes strings smaller, the decode is done in-place.
791 * Thus, callers should strdup() the argument if they do not want the
792 * argument modified. The return is the original pointer, allowing this
793 * function to be easily used as arguments to other functions.
796 * (char *) string . . . The first string to decode.
797 * (int) flag . . . 1 if require decode '+' as ' ' for CGI
799 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
803 ****************************************************************************/
804 static char *decodeString(char *orig, int flag_plus_to_space)
806 /* note that decoded string is always shorter than original */
812 if (*ptr == '+' && flag_plus_to_space) { *string++ = ' '; ptr++; }
813 else if (*ptr != '%') *string++ = *ptr++;
815 unsigned int value1, value2;
818 if(sscanf(ptr, "%1X", &value1) != 1 ||
819 sscanf(ptr+1, "%1X", &value2) != 1) {
820 if(!flag_plus_to_space)
824 value1 = value1 * 16 + value2;
825 if(value1 == '/' || value1 == 0)
837 #ifdef CONFIG_FEATURE_HTTPD_CGI
838 /****************************************************************************
840 > $Function: addEnv()
842 * $Description: Add an environment variable setting to the global list.
843 * A NAME=VALUE string is allocated, filled, and added to the list of
844 * environment settings passed to the cgi execution script.
847 * (char *) name_before_underline - The first part environment variable name.
848 * (char *) name_after_underline - The second part environment variable name.
849 * (char *) value . . The value to which the env variable is set.
853 * $Errors: Silently returns if the env runs out of space to hold the new item
855 ****************************************************************************/
856 static void addEnv(const char *name_before_underline,
857 const char *name_after_underline, const char *value)
860 const char *underline;
864 underline = *name_after_underline ? "_" : "";
865 asprintf(&s, "%s%s%s=%s", name_before_underline, underline,
866 name_after_underline, value);
872 #if defined(CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV) || !defined(CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY)
873 /* set environs SERVER_PORT and REMOTE_PORT */
874 static void addEnvPort(const char *port_name)
878 sprintf(buf, "%u", config->port);
879 addEnv(port_name, "PORT", buf);
882 #endif /* CONFIG_FEATURE_HTTPD_CGI */
885 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
886 /****************************************************************************
888 > $Function: decodeBase64()
890 > $Description: Decode a base 64 data stream as per rfc1521.
891 * Note that the rfc states that none base64 chars are to be ignored.
892 * Since the decode always results in a shorter size than the input, it is
893 * OK to pass the input arg as an output arg.
896 * (char *) Data . . . . A pointer to a base64 encoded string.
897 * Where to place the decoded data.
903 ****************************************************************************/
904 static void decodeBase64(char *Data)
907 const unsigned char *in = (const unsigned char *)Data;
908 // The decoded size will be at most 3/4 the size of the encoded
909 unsigned long ch = 0;
915 if(t >= '0' && t <= '9')
917 else if(t >= 'A' && t <= 'Z')
919 else if(t >= 'a' && t <= 'z')
933 *Data++ = (char) (ch >> 16);
934 *Data++ = (char) (ch >> 8);
944 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
945 /****************************************************************************
947 > $Function: openServer()
949 * $Description: create a listen server socket on the designated port.
951 * $Return: (int) . . . A connection socket. -1 for errors.
955 ****************************************************************************/
956 static int openServer(void)
958 struct sockaddr_in lsocket;
961 /* create the socket right now */
962 /* inet_addr() returns a value that is already in network order */
963 memset(&lsocket, 0, sizeof(lsocket));
964 lsocket.sin_family = AF_INET;
965 lsocket.sin_addr.s_addr = INADDR_ANY;
966 lsocket.sin_port = htons(config->port) ;
967 fd = socket(AF_INET, SOCK_STREAM, 0);
969 /* tell the OS it's OK to reuse a previous address even though */
970 /* it may still be in a close down state. Allows bind to succeed. */
973 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ;
975 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ;
977 if (bind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket)) == 0) {
979 signal(SIGCHLD, SIG_IGN); /* prevent zombie (defunct) processes */
981 bb_perror_msg_and_die("bind");
984 bb_perror_msg_and_die("create socket");
988 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
990 /****************************************************************************
992 > $Function: sendHeaders()
994 * $Description: Create and send HTTP response headers.
995 * The arguments are combined and sent as one write operation. Note that
996 * IE will puke big-time if the headers are not sent in one packet and the
997 * second packet is delayed for any reason.
1000 * (HttpResponseNum) responseNum . . . The result code to send.
1002 * $Return: (int) . . . . writing errors
1004 ****************************************************************************/
1005 static int sendHeaders(HttpResponseNum responseNum)
1007 char *buf = config->buf;
1008 const char *responseString = "";
1009 const char *infoString = 0;
1010 const char *mime_type;
1012 time_t timer = time(0);
1017 i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
1018 if (httpResponseNames[i].type == responseNum) {
1019 responseString = httpResponseNames[i].name;
1020 infoString = httpResponseNames[i].info;
1024 /* error message is HTML */
1025 mime_type = responseNum == HTTP_OK ?
1026 config->httpd_found.found_mime_type : "text/html";
1028 /* emit the current date */
1029 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
1031 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
1032 "Date: %s\r\nConnection: close\r\n",
1033 responseNum, responseString, mime_type, timeStr);
1035 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1036 if (responseNum == HTTP_UNAUTHORIZED) {
1037 len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
1041 if(responseNum == HTTP_MOVED_TEMPORARILY) {
1042 len += sprintf(buf+len, "Location: %s/%s%s\r\n",
1043 config->httpd_found.found_moved_temporarily,
1044 (config->query ? "?" : ""),
1045 (config->query ? config->query : ""));
1048 if (config->ContentLength != -1) { /* file */
1049 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
1050 len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n",
1051 timeStr, Content_length, cont_l_type config->ContentLength);
1053 strcat(buf, "\r\n");
1056 len += sprintf(buf+len,
1057 "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
1058 "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
1059 responseNum, responseString,
1060 responseNum, responseString, infoString);
1063 fprintf(stderr, "Headers: '%s'", buf);
1065 return bb_full_write(a_c_w, buf, len);
1068 /****************************************************************************
1070 > $Function: getLine()
1072 * $Description: Read from the socket until an end of line char found.
1074 * Characters are read one at a time until an eol sequence is found.
1076 * $Return: (int) . . . . number of characters read. -1 if error.
1078 ****************************************************************************/
1079 static int getLine(void)
1082 char *buf = config->buf;
1084 while (read(a_c_r, buf + count, 1) == 1) {
1085 if (buf[count] == '\r') continue;
1086 if (buf[count] == '\n') {
1090 if(count < (MAX_MEMORY_BUFF-1)) /* check owerflow */
1093 if (count) return count;
1097 #ifdef CONFIG_FEATURE_HTTPD_CGI
1098 /****************************************************************************
1100 > $Function: sendCgi()
1102 * $Description: Execute a CGI script and send it's stdout back
1104 * Environment variables are set up and the script is invoked with pipes
1105 * for stdin/stdout. If a post is being done the script is fed the POST
1106 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1109 * (const char *) url . . . . . . The requested URL (with leading /).
1110 * (int bodyLen) . . . . . . . . Length of the post body.
1111 * (const char *cookie) . . . . . For set HTTP_COOKIE.
1112 * (const char *content_type) . . For set CONTENT_TYPE.
1115 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
1119 ****************************************************************************/
1120 static int sendCgi(const char *url,
1121 const char *request, int bodyLen, const char *cookie,
1122 const char *content_type)
1124 int fromCgi[2]; /* pipe for reading data from CGI */
1125 int toCgi[2]; /* pipe for sending data to CGI */
1127 static char * argp[] = { 0, 0 };
1134 if (pipe(fromCgi) != 0) {
1137 if (pipe(toCgi) != 0) {
1150 char *purl = strdup( url );
1151 char realpath_buff[MAXPATHLEN];
1159 dup2(inFd, 0); // replace stdin with the pipe
1160 dup2(outFd, 1); // replace stdout with the pipe
1162 dup2(outFd, 2); // replace stderr with the pipe
1173 while((script = strchr( script + 1, '/' )) != NULL) {
1174 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1178 if(is_directory(purl + 1, 1, &sb) == 0) {
1179 /* not directory, found script.cgi/PATH_INFO */
1183 *script = '/'; /* is directory, find next '/' */
1185 addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */
1186 addEnv("PATH", "", getenv("PATH"));
1187 addEnv("REQUEST", "METHOD", request);
1189 char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1191 sprintf(uri, "%s?%s", purl, config->query);
1192 addEnv("REQUEST", "URI", uri);
1194 addEnv("REQUEST", "URI", purl);
1197 *script = '\0'; /* reduce /PATH_INFO */
1198 /* SCRIPT_FILENAME required by PHP in CGI mode */
1199 if(realpath(purl + 1, realpath_buff))
1200 addEnv("SCRIPT", "FILENAME", realpath_buff);
1203 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1204 addEnv("SCRIPT_NAME", "", purl);
1205 addEnv("QUERY_STRING", "", config->query);
1206 addEnv("SERVER", "SOFTWARE", httpdVersion);
1207 addEnv("SERVER", "PROTOCOL", "HTTP/1.0");
1208 addEnv("GATEWAY_INTERFACE", "", "CGI/1.1");
1209 addEnv("REMOTE", "ADDR", config->rmt_ip_str);
1210 #ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1211 addEnvPort("REMOTE");
1216 sprintf(sbl, "%d", bodyLen);
1217 addEnv("CONTENT", "LENGTH", sbl);
1220 addEnv("HTTP", "COOKIE", cookie);
1222 addEnv("CONTENT", "TYPE", content_type);
1223 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1224 if(config->remoteuser) {
1225 addEnv("REMOTE", "USER", config->remoteuser);
1226 addEnv("AUTH_TYPE", "", "Basic");
1230 addEnv("HTTP", "REFERER", config->referer);
1232 /* set execve argp[0] without path */
1233 argp[0] = strrchr( purl, '/' ) + 1;
1234 /* but script argp[0] must have absolute path and chdiring to this */
1235 if(*realpath_buff) {
1236 script = strrchr(realpath_buff, '/');
1239 if(chdir(realpath_buff) == 0) {
1240 // now run the program. If it fails,
1241 // use _exit() so no destructors
1242 // get called and make a mess.
1243 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1244 char *interpr = NULL;
1245 char *suffix = strrchr(purl, '.');
1249 for (cur = config->script_i; cur; cur = cur->next)
1250 if(strcmp(cur->before_colon + 1, suffix) == 0) {
1251 interpr = cur->after_colon;
1257 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1259 execv(interpr, argp);
1262 execv(realpath_buff, argp);
1266 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1267 config->accepted_socket = 1; /* send to stdout */
1269 sendHeaders(HTTP_NOT_FOUND);
1276 /* parent process */
1278 size_t post_readed_size = 0, post_readed_idx = 0;
1284 signal(SIGPIPE, SIG_IGN);
1295 FD_SET(inFd, &readSet);
1296 if(bodyLen > 0 || post_readed_size > 0) {
1297 FD_SET(outFd, &writeSet);
1298 nfound = outFd > inFd ? outFd : inFd;
1299 if(post_readed_size == 0) {
1300 FD_SET(a_c_r, &readSet);
1304 /* Now wait on the set of sockets! */
1305 nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
1311 nfound = select(inFd + 1, &readSet, 0, 0, NULL);
1315 if (waitpid(pid, &status, WNOHANG) > 0) {
1318 if (WIFEXITED(status))
1319 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1320 if (WIFSIGNALED(status))
1321 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1325 } else if(post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
1326 count = bb_full_write(outFd, wbuf + post_readed_idx, post_readed_size);
1328 post_readed_size -= count;
1329 post_readed_idx += count;
1330 if(post_readed_size == 0)
1331 post_readed_idx = 0;
1333 post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
1335 } else if(bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
1336 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1337 count = safe_read(a_c_r, wbuf, count);
1339 post_readed_size += count;
1342 bodyLen = 0; /* closed */
1345 if(FD_ISSET(inFd, &readSet)) {
1347 char *rbuf = config->buf;
1350 # define PIPESIZE 4096 /* amount of buffering in a pipe */
1352 # define PIPESIZE PIPE_BUF
1354 #if PIPESIZE >= MAX_MEMORY_BUFF
1355 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1358 // There is something to read
1359 count = safe_read(inFd, rbuf, PIPESIZE);
1365 /* check to see if the user script added headers */
1366 if(strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
1367 bb_full_write(s, "HTTP/1.0 200 OK\r\n", 17);
1369 if (strstr(rbuf, "ontent-") == 0) {
1370 bb_full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1374 if (bb_full_write(s, rbuf, count) != count)
1378 fprintf(stderr, "cgi read %d bytes\n", count);
1386 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1388 /****************************************************************************
1390 > $Function: sendFile()
1392 * $Description: Send a file response to an HTTP request
1395 * (const char *) url . . The URL requested.
1397 * $Return: (int) . . . . . . Always 0.
1399 ****************************************************************************/
1400 static int sendFile(const char *url)
1404 const char * const * table;
1405 const char * try_suffix;
1407 suffix = strrchr(url, '.');
1409 for (table = suffixTable; *table; table += 2)
1410 if(suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1411 try_suffix += strlen(suffix);
1412 if(*try_suffix == 0 || *try_suffix == '.')
1415 /* also, if not found, set default as "application/octet-stream"; */
1416 config->httpd_found.found_mime_type = *(table+1);
1417 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1421 for (cur = config->mime_a; cur; cur = cur->next) {
1422 if(strcmp(cur->before_colon, suffix) == 0) {
1423 config->httpd_found.found_mime_type = cur->after_colon;
1428 #endif /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1431 fprintf(stderr, "Sending file '%s' Content-type: %s\n",
1432 url, config->httpd_found.found_mime_type);
1435 f = open(url, O_RDONLY);
1438 char *buf = config->buf;
1440 sendHeaders(HTTP_OK);
1441 while ((count = bb_full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1442 if (bb_full_write(a_c_w, buf, count) != count)
1448 bb_perror_msg("Unable to open '%s'", url);
1450 sendHeaders(HTTP_NOT_FOUND);
1456 static int checkPermIP(void)
1460 /* This could stand some work */
1461 for (cur = config->ip_a_d; cur; cur = cur->next) {
1463 fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1464 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1465 (unsigned char)(cur->ip >> 24),
1466 (unsigned char)(cur->ip >> 16),
1467 (unsigned char)(cur->ip >> 8),
1469 (unsigned char)(cur->mask >> 24),
1470 (unsigned char)(cur->mask >> 16),
1471 (unsigned char)(cur->mask >> 8),
1474 if((config->rmt_ip & cur->mask) == cur->ip)
1475 return cur->allow_deny == 'A'; /* Allow/Deny */
1478 /* if unconfigured, return 1 - access from all */
1479 return !config->flg_deny_all;
1482 /****************************************************************************
1484 > $Function: checkPerm()
1486 * $Description: Check the permission file for access password protected.
1488 * If config file isn't present, everything is allowed.
1489 * Entries are of the form you can see example from header source
1492 * (const char *) path . . . . The file path.
1493 * (const char *) request . . . User information to validate.
1495 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1497 ****************************************************************************/
1499 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1500 static int checkPerm(const char *path, const char *request)
1506 const char *prev = NULL;
1508 /* This could stand some work */
1509 for (cur = config->auth; cur; cur = cur->next) {
1510 p0 = cur->before_colon;
1511 if(prev != NULL && strcmp(prev, p0) != 0)
1512 continue; /* find next identical */
1513 p = cur->after_colon;
1515 fprintf(stderr,"checkPerm: '%s' ? '%s'\n", p0, request);
1518 size_t l = strlen(p0);
1520 if(strncmp(p0, path, l) == 0 &&
1521 (l == 1 || path[l] == '/' || path[l] == 0)) {
1523 /* path match found. Check request */
1524 /* for check next /path:user:password */
1526 u = strchr(request, ':');
1528 /* bad request, ':' required */
1532 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1537 if(strncmp(p, request, u-request) != 0) {
1538 /* user uncompared */
1541 pp = strchr(p, ':');
1542 if(pp && pp[1] == '$' && pp[2] == '1' &&
1543 pp[3] == '$' && pp[4]) {
1545 cipher = pw_encrypt(u+1, pp);
1546 if (strcmp(cipher, pp) == 0)
1547 goto set_remoteuser_var; /* Ok */
1553 if (strcmp(p, request) == 0) {
1554 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1557 config->remoteuser = strdup(request);
1558 if(config->remoteuser)
1559 config->remoteuser[(u - request)] = 0;
1567 return prev == NULL;
1570 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1572 /****************************************************************************
1574 > $Function: handle_sigalrm()
1576 * $Description: Handle timeouts
1578 ****************************************************************************/
1581 handle_sigalrm( int sig )
1583 sendHeaders(HTTP_REQUEST_TIMEOUT);
1584 config->alarm_signaled = sig;
1587 /****************************************************************************
1589 > $Function: handleIncoming()
1591 * $Description: Handle an incoming http request.
1593 ****************************************************************************/
1594 static void handleIncoming(void)
1596 char *buf = config->buf;
1603 #ifdef CONFIG_FEATURE_HTTPD_CGI
1604 const char *prequest = request_GET;
1607 char *content_type = 0;
1609 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1614 struct sigaction sa;
1616 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1617 int credentials = -1; /* if not requred this is Ok */
1620 sa.sa_handler = handle_sigalrm;
1621 sigemptyset(&sa.sa_mask);
1622 sa.sa_flags = 0; /* no SA_RESTART */
1623 sigaction(SIGALRM, &sa, NULL);
1628 (void) alarm( TIMEOUT );
1632 purl = strpbrk(buf, " \t");
1635 sendHeaders(HTTP_BAD_REQUEST);
1639 #ifdef CONFIG_FEATURE_HTTPD_CGI
1640 if(strcasecmp(buf, prequest) != 0) {
1642 if(strcasecmp(buf, prequest) != 0) {
1643 sendHeaders(HTTP_NOT_IMPLEMENTED);
1648 if(strcasecmp(buf, request_GET) != 0) {
1649 sendHeaders(HTTP_NOT_IMPLEMENTED);
1654 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1656 if (count < 1 || buf[0] != '/') {
1657 /* Garbled request/URL */
1660 url = alloca(strlen(buf) + 12); /* + sizeof("/index.html\0") */
1662 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1666 /* extract url args if present */
1667 test = strchr(url, '?');
1670 config->query = test;
1673 test = decodeString(url, 0);
1676 if(test == (buf+1)) {
1677 sendHeaders(HTTP_NOT_FOUND);
1680 /* algorithm stolen from libbb bb_simplify_path(),
1681 but don`t strdup and reducing trailing slash and protect out root */
1686 if (*test == '/') { /* skip duplicate (or initial) slash */
1688 } else if (*test == '.') {
1689 if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
1691 } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
1694 /* protect out root */
1697 while (*--purl != '/'); /* omit previous dir */
1705 *++purl = 0; /* so keep last character */
1706 test = purl; /* end ptr */
1708 /* If URL is directory, adding '/' */
1709 if(test[-1] != '/') {
1710 if ( is_directory(url + 1, 1, &sb) ) {
1711 config->httpd_found.found_moved_temporarily = url;
1715 fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1719 ip_allowed = checkPermIP();
1720 while(ip_allowed && (test = strchr( test + 1, '/' )) != NULL) {
1721 /* have path1/path2 */
1723 if( is_directory(url + 1, 1, &sb) ) {
1724 /* may be having subdir config */
1725 parse_conf(url + 1, SUBDIR_PARSE);
1726 ip_allowed = checkPermIP();
1731 // read until blank line for HTTP version specified, else parse immediate
1739 fprintf(stderr, "Header: '%s'\n", buf);
1742 #ifdef CONFIG_FEATURE_HTTPD_CGI
1743 /* try and do our best to parse more lines */
1744 if ((strncasecmp(buf, Content_length, 15) == 0)) {
1745 if(prequest != request_GET)
1746 length = strtol(buf + 15, 0, 0); // extra read only for POST
1747 } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
1748 for(test = buf + 7; isspace(*test); test++)
1750 cookie = strdup(test);
1751 } else if ((strncasecmp(buf, "Content-Type:", 13) == 0)) {
1752 for(test = buf + 13; isspace(*test); test++)
1754 content_type = strdup(test);
1755 } else if ((strncasecmp(buf, "Referer:", 8) == 0)) {
1756 for(test = buf + 8; isspace(*test); test++)
1758 config->referer = strdup(test);
1762 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1763 if (strncasecmp(buf, "Authorization:", 14) == 0) {
1764 /* We only allow Basic credentials.
1765 * It shows up as "Authorization: Basic <userid:password>" where
1766 * the userid:password is base64 encoded.
1768 for(test = buf + 14; isspace(*test); test++)
1770 if (strncasecmp(test, "Basic", 5) != 0)
1773 test += 5; /* decodeBase64() skiping space self */
1775 credentials = checkPerm(url, test);
1777 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1779 } /* while extra header reading */
1782 if(config->alarm_signaled)
1785 if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1786 /* protect listing [/path]/httpd_conf or IP deny */
1787 #ifdef CONFIG_FEATURE_HTTPD_CGI
1788 FORBIDDEN: /* protect listing /cgi-bin */
1790 sendHeaders(HTTP_FORBIDDEN);
1794 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1795 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1796 sendHeaders(HTTP_UNAUTHORIZED);
1801 if(config->httpd_found.found_moved_temporarily) {
1802 sendHeaders(HTTP_MOVED_TEMPORARILY);
1804 /* clear unforked memory flag */
1805 config->httpd_found.found_moved_temporarily = NULL;
1810 test = url + 1; /* skip first '/' */
1812 #ifdef CONFIG_FEATURE_HTTPD_CGI
1813 /* if strange Content-Length */
1817 if (strncmp(test, "cgi-bin", 7) == 0) {
1818 if(test[7] == '/' && test[8] == 0)
1819 goto FORBIDDEN; // protect listing cgi-bin/
1820 sendCgi(url, prequest, length, cookie, content_type);
1822 if (prequest != request_GET)
1823 sendHeaders(HTTP_NOT_IMPLEMENTED);
1825 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1827 strcpy(purl, "index.html");
1828 if ( stat(test, &sb ) == 0 ) {
1829 config->ContentLength = sb.st_size;
1830 config->last_mod = sb.st_mtime;
1833 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1834 /* unset if non inetd looped */
1835 config->ContentLength = -1;
1838 #ifdef CONFIG_FEATURE_HTTPD_CGI
1846 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1847 /* from inetd don`t looping: freeing, closing automatic from exit always */
1849 fprintf(stderr, "closing socket\n");
1851 # ifdef CONFIG_FEATURE_HTTPD_CGI
1854 free(config->referer);
1855 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1856 free(config->remoteuser);
1859 shutdown(a_c_w, SHUT_WR);
1861 /* Properly wait for remote to closed */
1863 FD_SET (a_c_w, &s_fd) ;
1868 retval = select (a_c_w + 1, &s_fd, NULL, NULL, &tv);
1869 } while (retval > 0 && (read (a_c_w, buf, sizeof (config->buf)) > 0));
1871 shutdown(a_c_r, SHUT_RD);
1872 close(config->accepted_socket);
1873 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1876 /****************************************************************************
1878 > $Function: miniHttpd()
1880 * $Description: The main http server function.
1882 * Given an open socket fildes, listen for new connections and farm out
1883 * the processing as a forked process.
1886 * (int) server. . . The server socket fildes.
1888 * $Return: (int) . . . . Always 0.
1890 ****************************************************************************/
1891 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1892 static int miniHttpd(int server)
1894 fd_set readfd, portfd;
1897 FD_SET(server, &portfd);
1899 /* copy the ports we are watching to the readfd set */
1903 /* Now wait INDEFINITELY on the set of sockets! */
1904 if (select(server + 1, &readfd, 0, 0, 0) > 0) {
1905 if (FD_ISSET(server, &readfd)) {
1907 struct sockaddr_in fromAddr;
1909 socklen_t fromAddrLen = sizeof(fromAddr);
1910 int s = accept(server,
1911 (struct sockaddr *)&fromAddr, &fromAddrLen);
1916 config->accepted_socket = s;
1917 config->rmt_ip = ntohl(fromAddr.sin_addr.s_addr);
1918 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1919 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1920 (unsigned char)(config->rmt_ip >> 24),
1921 (unsigned char)(config->rmt_ip >> 16),
1922 (unsigned char)(config->rmt_ip >> 8),
1923 config->rmt_ip & 0xff);
1924 config->port = ntohs(fromAddr.sin_port);
1926 bb_error_msg("connection from IP=%s, port %u\n",
1927 config->rmt_ip_str, config->port);
1929 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1931 /* set the KEEPALIVE option to cull dead connections */
1933 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on));
1939 /* This is the spawned thread */
1940 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1941 /* protect reload config, may be confuse checking */
1942 signal(SIGHUP, SIG_IGN);
1959 static int miniHttpd(void)
1961 struct sockaddr_in fromAddrLen;
1962 socklen_t sinlen = sizeof (struct sockaddr_in);
1964 getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen);
1965 config->rmt_ip = ntohl(fromAddrLen.sin_addr.s_addr);
1966 #if ENABLE_FEATURE_HTTPD_CGI
1967 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1968 (unsigned char)(config->rmt_ip >> 24),
1969 (unsigned char)(config->rmt_ip >> 16),
1970 (unsigned char)(config->rmt_ip >> 8),
1971 config->rmt_ip & 0xff);
1973 config->port = ntohs(fromAddrLen.sin_port);
1977 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1979 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1980 static void sighup_handler(int sig)
1983 struct sigaction sa;
1985 parse_conf(default_path_httpd_conf,
1986 sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1987 sa.sa_handler = sighup_handler;
1988 sigemptyset(&sa.sa_mask);
1989 sa.sa_flags = SA_RESTART;
1990 sigaction(SIGHUP, &sa, NULL);
1995 static const char httpd_opts[]="c:d:h:"
1996 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
1999 #define OPT_INC_1 ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
2001 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
2004 #define OPT_INC_2 ENABLE_FEATURE_HTTPD_BASIC_AUTH
2006 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2009 #define OPT_INC_3 ENABLE_FEATURE_HTTPD_AUTH_MD5
2011 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2014 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2019 #define OPT_CONFIG_FILE (1<<0) /* c */
2020 #define OPT_DECODE_URL (1<<1) /* d */
2021 #define OPT_HOME_HTTPD (1<<2) /* h */
2022 #define OPT_ENCODE_URL (1<<(2+OPT_INC_1)) /* e */
2023 #define OPT_REALM (1<<(2+OPT_INC_1+OPT_INC_2)) /* r */
2024 #define OPT_MD5 (1<<(2+OPT_INC_1+OPT_INC_2+OPT_INC_3)) /* m */
2025 #define OPT_PORT (1<<(3+OPT_INC_1+OPT_INC_2+OPT_INC_3)) /* p */
2026 #define OPT_SETUID (1<<(4+OPT_INC_1+OPT_INC_2+OPT_INC_3)) /* u */
2029 #ifdef HTTPD_STANDALONE
2030 int main(int argc, char *argv[])
2032 int httpd_main(int argc, char *argv[])
2036 const char *home_httpd = home;
2037 char *url_for_decode;
2038 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2039 const char *url_for_encode;
2041 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2046 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2051 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2055 config = xcalloc(1, sizeof(*config));
2056 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
2057 config->realm = "Web Server Authentication";
2060 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2064 config->ContentLength = -1;
2066 opt = bb_getopt_ulflags(argc, argv, httpd_opts,
2067 &(config->configFile), &url_for_decode, &home_httpd
2068 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2071 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
2073 # ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2077 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2080 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2085 if(opt & OPT_DECODE_URL) {
2086 printf("%s", decodeString(url_for_decode, 1));
2089 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2090 if(opt & OPT_ENCODE_URL) {
2091 printf("%s", encodeString(url_for_encode));
2095 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2097 printf("%s\n", pw_encrypt(pass, "$1$"));
2101 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2103 config->port = bb_xgetlarg(s_port, 10, 1, 0xffff);
2104 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2105 if(opt & OPT_SETUID) {
2108 uid = strtol(s_uid, &e, 0);
2111 uid = bb_xgetpwnam(s_uid);
2117 if(chdir(home_httpd)) {
2118 bb_perror_msg_and_die("can`t chdir to %s", home_httpd);
2120 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2121 server = openServer();
2122 # ifdef CONFIG_FEATURE_HTTPD_SETUID
2123 /* drop privileges */
2129 #ifdef CONFIG_FEATURE_HTTPD_CGI
2131 char *p = getenv("PATH");
2137 setenv("PATH", p, 1);
2138 # ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2139 addEnvPort("SERVER");
2144 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2147 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2150 #if !ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2152 if (daemon(1, 0) < 0) /* don`t change curent directory */
2153 bb_perror_msg_and_die("daemon");
2155 return miniHttpd(server);