2 * httpd implementation for busybox
4 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
5 * Copyright (C) 2003,2004 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
58 * A/D may be as a/d or allow/deny - first char case insensitive
59 * Deny IP rules take precedence over allow rules.
62 * The Deny/Allow IP logic:
64 * - Default is to allow all. No addresses are denied unless
65 * denied with a D: rule.
66 * - Order of Deny/Allow rules is significant
67 * - Deny rules take precedence over allow rules.
68 * - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
70 * - Specification of Allow all (A:*) is a no-op
73 * 1. Allow only specified addresses
74 * A:172.20 # Allow any address that begins with 172.20.
75 * A:10.10. # Allow any address that begins with 10.10.
76 * A:127.0.0.1 # Allow local loopback connections
77 * D:* # Deny from other IP connections
79 * 2. Only deny specified addresses
80 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
81 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
82 * A:* # (optional line added for clarity)
84 * If a sub directory contains a config file it is parsed and merged with
85 * any existing settings as if it was appended to the original configuration.
87 * subdir paths are relative to the containing subdir and thus cannot
88 * affect the parent rules.
90 * Note that since the sub dir is parsed in the forked thread servicing the
91 * subdir http request, any merge is discarded when the process exits. As a
92 * result, the subdir settings only have a lifetime of a single request.
95 * If -c is not set, an attempt will be made to open the default
96 * root configuration file. If -c is set and the file is not found, the
97 * server exits with an error.
103 #include <ctype.h> /* for isspace */
105 #include <stdlib.h> /* for malloc */
107 #include <unistd.h> /* for close */
109 #include <sys/types.h>
110 #include <sys/socket.h> /* for connect and socket*/
111 #include <netinet/in.h> /* for sockaddr_in */
112 #include <sys/time.h>
113 #include <sys/stat.h>
114 #include <sys/wait.h>
115 #include <fcntl.h> /* for open modes */
119 static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
120 static const char default_path_httpd_conf[] = "/etc";
121 static const char httpd_conf[] = "httpd.conf";
122 static const char home[] = "./";
125 # define cont_l_fmt "%lld"
127 # define cont_l_fmt "%ld"
132 // Note: busybox xfuncs are not used because we want the server to keep running
133 // if something bad happens due to a malformed user request.
134 // As a result, all memory allocation after daemonize
135 // is checked rigorously
139 /* Configure options, disabled by default as custom httpd feature */
141 /* disabled as optional features */
142 //#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
143 //#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
144 //#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
145 //#define CONFIG_FEATURE_HTTPD_SETUID
146 //#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
148 /* If set, use this server from internet superserver only */
149 //#define CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
151 /* You can use this server as standalone, require libbb.a for linking */
152 //#define HTTPD_STANDALONE
154 /* Config options, disable this for do very small module */
155 //#define CONFIG_FEATURE_HTTPD_CGI
156 //#define CONFIG_FEATURE_HTTPD_BASIC_AUTH
157 //#define CONFIG_FEATURE_HTTPD_AUTH_MD5
159 #ifdef HTTPD_STANDALONE
160 /* standalone, enable all features */
161 #undef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
162 /* unset config option for remove warning as redefined */
163 #undef CONFIG_FEATURE_HTTPD_BASIC_AUTH
164 #undef CONFIG_FEATURE_HTTPD_AUTH_MD5
165 #undef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
166 #undef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
167 #undef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
168 #undef CONFIG_FEATURE_HTTPD_CGI
169 #undef CONFIG_FEATURE_HTTPD_SETUID
170 #undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
171 #undef ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
172 #undef ENABLE_FEATURE_HTTPD_BASIC_AUTH
173 #undef ENABLE_FEATURE_HTTPD_AUTH_MD5
174 #undef ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
175 #undef ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
176 #undef ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
177 #undef ENABLE_FEATURE_HTTPD_CGI
178 #undef ENABLE_FEATURE_HTTPD_SETUID
179 #undef ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
180 /* enable all features now */
181 #define CONFIG_FEATURE_HTTPD_BASIC_AUTH
182 #define CONFIG_FEATURE_HTTPD_AUTH_MD5
183 #define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
184 #define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
185 #define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
186 #define CONFIG_FEATURE_HTTPD_CGI
187 #define CONFIG_FEATURE_HTTPD_SETUID
188 #define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
189 #define ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY 0
190 #define ENABLE_FEATURE_HTTPD_BASIC_AUTH 1
191 #define ENABLE_FEATURE_HTTPD_AUTH_MD5 1
192 #define ENABLE_FEATURE_HTTPD_ENCODE_URL_STR 1
193 #define ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV 1
194 #define ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES 1
195 #define ENABLE_FEATURE_HTTPD_CGI 1
196 #define ENABLE_FEATURE_HTTPD_SETUID 1
197 #define ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP 1
199 /* require from libbb.a for linking */
200 const char *bb_applet_name = "httpd";
202 void bb_show_usage(void)
204 fprintf(stderr, "Usage: %s [-p <port>] [-c configFile] [-d/-e <string>] "
205 "[-r realm] [-u user] [-h homedir]\n", bb_applet_name);
210 #ifdef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
211 #undef CONFIG_FEATURE_HTTPD_SETUID /* use inetd user.group config settings */
212 #undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP /* so is not daemon */
213 /* inetd set stderr to accepted socket and we can`t true see debug messages */
221 #define MAX_MEMORY_BUFF 8192 /* IO buffer */
223 typedef struct HT_ACCESS {
225 struct HT_ACCESS *next;
226 char before_colon[1]; /* really bigger, must last */
229 typedef struct HT_ACCESS_IP {
233 struct HT_ACCESS_IP *next;
238 char buf[MAX_MEMORY_BUFF];
240 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
247 #ifdef CONFIG_FEATURE_HTTPD_CGI
251 const char *configFile;
254 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
255 char rmt_ip_str[16]; /* for set env REMOTE_ADDR */
257 unsigned port; /* server initial port and for
258 set env REMOTE_PORT */
260 const char *found_mime_type;
261 const char *found_moved_temporarily;
264 off_t ContentLength; /* -1 - unknown */
267 Htaccess_IP *ip_a_d; /* config allow/deny lines */
269 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
270 Htaccess *auth; /* config user:password lines */
272 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
273 Htaccess *mime_a; /* config mime types */
276 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
278 # define a_c_r config->accepted_socket
279 # define a_c_w config->accepted_socket
284 volatile int alarm_signaled;
288 static HttpdConfig *config;
290 static const char request_GET[] = "GET"; /* size algorithic optimize */
292 static const char* const suffixTable [] = {
293 /* Warning: shorted equivalent suffix in one line must be first */
294 ".htm.html", "text/html",
295 ".jpg.jpeg", "image/jpeg",
298 ".txt.h.c.cc.cpp", "text/plain",
301 ".avi", "video/x-msvideo",
302 ".qt.mov", "video/quicktime",
303 ".mpe.mpeg", "video/mpeg",
304 ".mid.midi", "audio/midi",
305 ".mp3", "audio/mpeg",
306 #if 0 /* unpopular */
307 ".au", "audio/basic",
308 ".pac", "application/x-ns-proxy-autoconfig",
309 ".vrml.wrl", "model/vrml",
311 0, "application/octet-stream" /* default */
317 HTTP_MOVED_TEMPORARILY = 302,
318 HTTP_BAD_REQUEST = 400, /* malformed syntax */
319 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
320 HTTP_NOT_FOUND = 404,
321 HTTP_FORBIDDEN = 403,
322 HTTP_REQUEST_TIMEOUT = 408,
323 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
324 HTTP_INTERNAL_SERVER_ERROR = 500,
325 #if 0 /* future use */
327 HTTP_SWITCHING_PROTOCOLS = 101,
330 HTTP_NON_AUTHORITATIVE_INFO = 203,
331 HTTP_NO_CONTENT = 204,
332 HTTP_MULTIPLE_CHOICES = 300,
333 HTTP_MOVED_PERMANENTLY = 301,
334 HTTP_NOT_MODIFIED = 304,
335 HTTP_PAYMENT_REQUIRED = 402,
336 HTTP_BAD_GATEWAY = 502,
337 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
338 HTTP_RESPONSE_SETSIZE=0xffffffff
344 HttpResponseNum type;
349 static const HttpEnumString httpResponseNames[] = {
350 { HTTP_OK, "OK", NULL },
351 { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
352 { HTTP_REQUEST_TIMEOUT, "Request Timeout",
353 "No request appeared within a reasonable time period." },
354 { HTTP_NOT_IMPLEMENTED, "Not Implemented",
355 "The requested method is not recognized by this server." },
356 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
357 { HTTP_UNAUTHORIZED, "Unauthorized", "" },
359 { HTTP_NOT_FOUND, "Not Found",
360 "The requested URL was not found on this server." },
361 { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
362 { HTTP_FORBIDDEN, "Forbidden", "" },
363 { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
364 "Internal Server Error" },
365 #if 0 /* not implemented */
366 { HTTP_CREATED, "Created" },
367 { HTTP_ACCEPTED, "Accepted" },
368 { HTTP_NO_CONTENT, "No Content" },
369 { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
370 { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
371 { HTTP_NOT_MODIFIED, "Not Modified" },
372 { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
373 { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
378 static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
379 static const char Content_length[] = "Content-length:";
383 scan_ip (const char **ep, unsigned int *ip, unsigned char endc)
390 for (j = 0; j < 4; j++) {
393 if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
396 while (*p >= '0' && *p <= '9') {
405 if (*p != '/' && *p != 0)
407 *ip = ((*ip) << 8) | octet;
421 scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask)
426 i = scan_ip(&ipm, ip, '/');
434 if (*p < '0' || *p > '9') {
436 i = scan_ip (&ipm, mask, 0);
458 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES)
459 static void free_config_lines(Htaccess **pprev)
461 Htaccess *prev = *pprev;
464 Htaccess *cur = prev;
474 #define FIRST_PARSE 0
475 #define SUBDIR_PARSE 1
476 #define SIGNALED_PARSE 2
477 #define FIND_FROM_HTTPD_ROOT 3
478 /****************************************************************************
480 > $Function: parse_conf()
482 * $Description: parse configuration file into in-memory linked list.
484 * The first non-white character is examined to determine if the config line
485 * is one of the following:
486 * .ext:mime/type # new mime type not compiled into httpd
487 * [adAD]:from # ip address allow/deny, * for wildcard
488 * /path:user:pass # username/password
490 * Any previous IP rules are discarded.
491 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
492 * are also discarded. That is, previous settings are retained if flag is
496 * (const char *) path . . null for ip address checks, path for password
498 * (int) flag . . . . . . the source of the parse request.
502 ****************************************************************************/
503 static void parse_conf(const char *path, int flag)
506 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
507 Htaccess *prev, *cur;
508 #elif CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
512 const char *cf = config->configFile;
517 /* free previous ip setup if present */
518 Htaccess_IP *pip = config->ip_a_d;
521 Htaccess_IP *cur_ipl = pip;
526 config->ip_a_d = NULL;
528 config->flg_deny_all = 0;
530 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES)
531 /* retain previous auth and mime config only for subdir parse */
532 if(flag != SUBDIR_PARSE) {
533 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
534 free_config_lines(&config->auth);
536 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
537 free_config_lines(&config->mime_a);
542 if(flag == SUBDIR_PARSE || cf == NULL) {
543 cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
545 if(flag == FIRST_PARSE)
546 bb_error_msg_and_die(bb_msg_memory_exhausted);
549 sprintf((char *)cf, "%s/%s", path, httpd_conf);
552 while((f = fopen(cf, "r")) == NULL) {
553 if(flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
554 /* config file not found, no changes to config */
557 if(config->configFile && flag == FIRST_PARSE) /* if -c option given */
558 bb_perror_msg_and_die("%s", cf);
559 flag = FIND_FROM_HTTPD_ROOT;
563 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
566 /* This could stand some work */
567 while ( (p0 = fgets(buf, sizeof(buf), f)) != NULL) {
569 for(p = p0; *p0 != 0 && *p0 != '#'; p0++) {
572 if(*p0 == ':' && c == NULL)
578 /* test for empty or strange line */
579 if (c == NULL || *c == 0)
586 /* memorize deny all */
587 config->flg_deny_all++;
589 /* skip default other "word:*" config lines */
595 else if(*p0 != 'D' && *p0 != 'A'
596 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
599 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
604 if(*p0 == 'A' || *p0 == 'D') {
605 /* storing current config IP line */
606 pip = calloc(1, sizeof(Htaccess_IP));
608 if(scan_ip_mask (c, &(pip->ip), &(pip->mask))) {
609 /* syntax IP{/mask} error detected, protect all */
613 pip->allow_deny = *p0;
615 /* Deny:form_IP move top */
616 pip->next = config->ip_a_d;
617 config->ip_a_d = pip;
619 /* add to bottom A:form_IP config line */
620 Htaccess_IP *prev_IP = config->ip_a_d;
622 if(prev_IP == NULL) {
623 config->ip_a_d = pip;
626 prev_IP = prev_IP->next;
633 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
635 /* make full path from httpd root / curent_path / config_line_path */
636 cf = flag == SUBDIR_PARSE ? path : "";
637 p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
641 sprintf(p0, "/%s%s", cf, buf);
643 /* another call bb_simplify_path */
648 if (*cf == '/') { /* skip duplicate (or initial) slash */
650 } else if (*cf == '.') {
651 if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
653 } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
656 while (*--p != '/'); /* omit previous dir */
665 if ((p == p0) || (*p != '/')) { /* not a trailing slash */
666 ++p; /* so keep last character */
669 sprintf(p0, "%s:%s", p0, c);
673 #if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES)
674 /* storing current config line */
675 cur = calloc(1, sizeof(Htaccess) + strlen(p0));
677 cf = strcpy(cur->before_colon, p0);
680 cur->after_colon = c;
681 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
683 /* config .mime line move top for overwrite previous */
684 cur->next = config->mime_a;
685 config->mime_a = cur;
689 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
693 config->auth = prev = cur;
695 /* sort path, if current lenght eq or bigger then move up */
696 Htaccess *prev_hti = config->auth;
697 size_t l = strlen(cf);
700 for(hti = prev_hti; hti; hti = hti->next) {
701 if(l >= strlen(hti->before_colon)) {
702 /* insert before hti */
704 if(prev_hti != hti) {
705 prev_hti->next = cur;
713 prev_hti = prev_hti->next;
715 if(!hti) { /* not inserted, add to bottom */
727 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
728 /****************************************************************************
730 > $Function: encodeString()
732 * $Description: Given a string, html encode special characters.
733 * This is used for the -e command line option to provide an easy way
734 * for scripts to encode result data without confusing browsers. The
735 * returned string pointer is memory allocated by malloc().
738 * (const char *) string . . The first string to encode.
740 * $Return: (char *) . . . .. . . A pointer to the encoded string.
742 * $Errors: Returns a null string ("") if memory is not available.
744 ****************************************************************************/
745 static char *encodeString(const char *string)
747 /* take the simple route and encode everything */
748 /* could possibly scan once to get length. */
749 int len = strlen(string);
750 char *out = malloc(len * 6 + 1);
755 while ((ch = *string++)) {
756 // very simple check for what to encode
757 if (isalnum(ch)) *p++ = ch;
758 else p += sprintf(p, "&#%d;", (unsigned char) ch);
763 #endif /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */
765 /****************************************************************************
767 > $Function: decodeString()
769 * $Description: Given a URL encoded string, convert it to plain ascii.
770 * Since decoding always makes strings smaller, the decode is done in-place.
771 * Thus, callers should strdup() the argument if they do not want the
772 * argument modified. The return is the original pointer, allowing this
773 * function to be easily used as arguments to other functions.
776 * (char *) string . . . The first string to decode.
777 * (int) flag . . . 1 if require decode '+' as ' ' for CGI
779 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
783 ****************************************************************************/
784 static char *decodeString(char *orig, int flag_plus_to_space)
786 /* note that decoded string is always shorter than original */
792 if (*ptr == '+' && flag_plus_to_space) { *string++ = ' '; ptr++; }
793 else if (*ptr != '%') *string++ = *ptr++;
795 unsigned int value1, value2;
798 if(sscanf(ptr, "%1X", &value1) != 1 ||
799 sscanf(ptr+1, "%1X", &value2) != 1) {
800 if(!flag_plus_to_space)
804 value1 = value1 * 16 + value2;
805 if(value1 == '/' || value1 == 0)
817 #ifdef CONFIG_FEATURE_HTTPD_CGI
818 /****************************************************************************
820 > $Function: addEnv()
822 * $Description: Add an environment variable setting to the global list.
823 * A NAME=VALUE string is allocated, filled, and added to the list of
824 * environment settings passed to the cgi execution script.
827 * (char *) name_before_underline - The first part environment variable name.
828 * (char *) name_after_underline - The second part environment variable name.
829 * (char *) value . . The value to which the env variable is set.
833 * $Errors: Silently returns if the env runs out of space to hold the new item
835 ****************************************************************************/
836 static void addEnv(const char *name_before_underline,
837 const char *name_after_underline, const char *value)
840 const char *underline;
844 underline = *name_after_underline ? "_" : "";
845 asprintf(&s, "%s%s%s=%s", name_before_underline, underline,
846 name_after_underline, value);
852 #if defined(CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV) || !defined(CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY)
853 /* set environs SERVER_PORT and REMOTE_PORT */
854 static void addEnvPort(const char *port_name)
858 sprintf(buf, "%u", config->port);
859 addEnv(port_name, "PORT", buf);
862 #endif /* CONFIG_FEATURE_HTTPD_CGI */
865 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
866 /****************************************************************************
868 > $Function: decodeBase64()
870 > $Description: Decode a base 64 data stream as per rfc1521.
871 * Note that the rfc states that none base64 chars are to be ignored.
872 * Since the decode always results in a shorter size than the input, it is
873 * OK to pass the input arg as an output arg.
876 * (char *) Data . . . . A pointer to a base64 encoded string.
877 * Where to place the decoded data.
883 ****************************************************************************/
884 static void decodeBase64(char *Data)
887 const unsigned char *in = (const unsigned char *)Data;
888 // The decoded size will be at most 3/4 the size of the encoded
889 unsigned long ch = 0;
895 if(t >= '0' && t <= '9')
897 else if(t >= 'A' && t <= 'Z')
899 else if(t >= 'a' && t <= 'z')
913 *Data++ = (char) (ch >> 16);
914 *Data++ = (char) (ch >> 8);
924 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
925 /****************************************************************************
927 > $Function: openServer()
929 * $Description: create a listen server socket on the designated port.
931 * $Return: (int) . . . A connection socket. -1 for errors.
935 ****************************************************************************/
936 static int openServer(void)
938 struct sockaddr_in lsocket;
941 /* create the socket right now */
942 /* inet_addr() returns a value that is already in network order */
943 memset(&lsocket, 0, sizeof(lsocket));
944 lsocket.sin_family = AF_INET;
945 lsocket.sin_addr.s_addr = INADDR_ANY;
946 lsocket.sin_port = htons(config->port) ;
947 fd = socket(AF_INET, SOCK_STREAM, 0);
949 /* tell the OS it's OK to reuse a previous address even though */
950 /* it may still be in a close down state. Allows bind to succeed. */
953 setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ;
955 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ;
957 if (bind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket)) == 0) {
959 signal(SIGCHLD, SIG_IGN); /* prevent zombie (defunct) processes */
961 bb_perror_msg_and_die("bind");
964 bb_perror_msg_and_die("create socket");
968 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
970 /****************************************************************************
972 > $Function: sendHeaders()
974 * $Description: Create and send HTTP response headers.
975 * The arguments are combined and sent as one write operation. Note that
976 * IE will puke big-time if the headers are not sent in one packet and the
977 * second packet is delayed for any reason.
980 * (HttpResponseNum) responseNum . . . The result code to send.
982 * $Return: (int) . . . . writing errors
984 ****************************************************************************/
985 static int sendHeaders(HttpResponseNum responseNum)
987 char *buf = config->buf;
988 const char *responseString = "";
989 const char *infoString = 0;
990 const char *mime_type;
992 time_t timer = time(0);
997 i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
998 if (httpResponseNames[i].type == responseNum) {
999 responseString = httpResponseNames[i].name;
1000 infoString = httpResponseNames[i].info;
1004 /* error message is HTML */
1005 mime_type = responseNum == HTTP_OK ?
1006 config->httpd_found.found_mime_type : "text/html";
1008 /* emit the current date */
1009 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
1011 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
1012 "Date: %s\r\nConnection: close\r\n",
1013 responseNum, responseString, mime_type, timeStr);
1015 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1016 if (responseNum == HTTP_UNAUTHORIZED) {
1017 len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
1021 if(responseNum == HTTP_MOVED_TEMPORARILY) {
1022 len += sprintf(buf+len, "Location: %s/%s%s\r\n",
1023 config->httpd_found.found_moved_temporarily,
1024 (config->query ? "?" : ""),
1025 (config->query ? config->query : ""));
1028 if (config->ContentLength != -1) { /* file */
1029 strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
1030 len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n",
1031 timeStr, Content_length, config->ContentLength);
1033 strcat(buf, "\r\n");
1036 len += sprintf(buf+len,
1037 "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
1038 "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
1039 responseNum, responseString,
1040 responseNum, responseString, infoString);
1043 fprintf(stderr, "Headers: '%s'", buf);
1045 return bb_full_write(a_c_w, buf, len);
1048 /****************************************************************************
1050 > $Function: getLine()
1052 * $Description: Read from the socket until an end of line char found.
1054 * Characters are read one at a time until an eol sequence is found.
1056 * $Return: (int) . . . . number of characters read. -1 if error.
1058 ****************************************************************************/
1059 static int getLine(void)
1062 char *buf = config->buf;
1064 while (read(a_c_r, buf + count, 1) == 1) {
1065 if (buf[count] == '\r') continue;
1066 if (buf[count] == '\n') {
1070 if(count < (MAX_MEMORY_BUFF-1)) /* check owerflow */
1073 if (count) return count;
1077 #ifdef CONFIG_FEATURE_HTTPD_CGI
1078 /****************************************************************************
1080 > $Function: sendCgi()
1082 * $Description: Execute a CGI script and send it's stdout back
1084 * Environment variables are set up and the script is invoked with pipes
1085 * for stdin/stdout. If a post is being done the script is fed the POST
1086 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1089 * (const char *) url . . . . . . The requested URL (with leading /).
1090 * (int bodyLen) . . . . . . . . Length of the post body.
1091 * (const char *cookie) . . . . . For set HTTP_COOKIE.
1092 * (const char *content_type) . . For set CONTENT_TYPE.
1095 * $Return: (char *) . . . . A pointer to the decoded string (same as input).
1099 ****************************************************************************/
1100 static int sendCgi(const char *url,
1101 const char *request, int bodyLen, const char *cookie,
1102 const char *content_type)
1104 int fromCgi[2]; /* pipe for reading data from CGI */
1105 int toCgi[2]; /* pipe for sending data to CGI */
1107 static char * argp[] = { 0, 0 };
1114 if (pipe(fromCgi) != 0) {
1117 if (pipe(toCgi) != 0) {
1130 char *purl = strdup( url );
1131 char realpath_buff[MAXPATHLEN];
1139 dup2(inFd, 0); // replace stdin with the pipe
1140 dup2(outFd, 1); // replace stdout with the pipe
1142 dup2(outFd, 2); // replace stderr with the pipe
1153 while((script = strchr( script + 1, '/' )) != NULL) {
1154 /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1158 if(is_directory(purl + 1, 1, &sb) == 0) {
1159 /* not directory, found script.cgi/PATH_INFO */
1163 *script = '/'; /* is directory, find next '/' */
1165 addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */
1166 addEnv("PATH", "", getenv("PATH"));
1167 addEnv("REQUEST", "METHOD", request);
1169 char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1171 sprintf(uri, "%s?%s", purl, config->query);
1172 addEnv("REQUEST", "URI", uri);
1174 addEnv("REQUEST", "URI", purl);
1177 *script = '\0'; /* reduce /PATH_INFO */
1178 /* SCRIPT_FILENAME required by PHP in CGI mode */
1179 if(realpath(purl + 1, realpath_buff))
1180 addEnv("SCRIPT", "FILENAME", realpath_buff);
1183 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1184 addEnv("SCRIPT_NAME", "", purl);
1185 addEnv("QUERY_STRING", "", config->query);
1186 addEnv("SERVER", "SOFTWARE", httpdVersion);
1187 addEnv("SERVER", "PROTOCOL", "HTTP/1.0");
1188 addEnv("GATEWAY_INTERFACE", "", "CGI/1.1");
1189 addEnv("REMOTE", "ADDR", config->rmt_ip_str);
1190 #ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1191 addEnvPort("REMOTE");
1196 sprintf(sbl, "%d", bodyLen);
1197 addEnv("CONTENT", "LENGTH", sbl);
1200 addEnv("HTTP", "COOKIE", cookie);
1202 addEnv("CONTENT", "TYPE", content_type);
1203 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1204 if(config->remoteuser) {
1205 addEnv("REMOTE", "USER", config->remoteuser);
1206 addEnv("AUTH_TYPE", "", "Basic");
1210 addEnv("HTTP", "REFERER", config->referer);
1212 /* set execve argp[0] without path */
1213 argp[0] = strrchr( purl, '/' ) + 1;
1214 /* but script argp[0] must have absolute path and chdiring to this */
1215 if(*realpath_buff) {
1216 script = strrchr(realpath_buff, '/');
1219 if(chdir(realpath_buff) == 0) {
1221 // now run the program. If it fails,
1222 // use _exit() so no destructors
1223 // get called and make a mess.
1224 execv(realpath_buff, argp);
1228 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1229 config->accepted_socket = 1; /* send to stdout */
1231 sendHeaders(HTTP_NOT_FOUND);
1238 /* parent process */
1240 size_t post_readed_size = 0, post_readed_idx = 0;
1246 signal(SIGPIPE, SIG_IGN);
1257 FD_SET(inFd, &readSet);
1258 if(bodyLen > 0 || post_readed_size > 0) {
1259 FD_SET(outFd, &writeSet);
1260 nfound = outFd > inFd ? outFd : inFd;
1261 if(post_readed_size == 0) {
1262 FD_SET(a_c_r, &readSet);
1266 /* Now wait on the set of sockets! */
1267 nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
1273 nfound = select(inFd + 1, &readSet, 0, 0, NULL);
1277 if (waitpid(pid, &status, WNOHANG) > 0) {
1280 if (WIFEXITED(status))
1281 bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1282 if (WIFSIGNALED(status))
1283 bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1287 } else if(post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
1288 count = bb_full_write(outFd, wbuf + post_readed_idx, post_readed_size);
1290 post_readed_size -= count;
1291 post_readed_idx += count;
1292 if(post_readed_size == 0)
1293 post_readed_idx = 0;
1295 post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
1297 } else if(bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
1298 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1299 count = safe_read(a_c_r, wbuf, count);
1301 post_readed_size += count;
1304 bodyLen = 0; /* closed */
1307 if(FD_ISSET(inFd, &readSet)) {
1309 char *rbuf = config->buf;
1312 # define PIPESIZE 4096 /* amount of buffering in a pipe */
1314 # define PIPESIZE PIPE_BUF
1316 #if PIPESIZE >= MAX_MEMORY_BUFF
1317 # error "PIPESIZE >= MAX_MEMORY_BUFF"
1320 // There is something to read
1321 count = safe_read(inFd, rbuf, PIPESIZE);
1327 /* check to see if the user script added headers */
1328 if(strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
1329 bb_full_write(s, "HTTP/1.0 200 OK\r\n", 17);
1331 if (strstr(rbuf, "ontent-") == 0) {
1332 bb_full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1336 if (bb_full_write(s, rbuf, count) != count)
1340 fprintf(stderr, "cgi read %d bytes\n", count);
1348 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1350 /****************************************************************************
1352 > $Function: sendFile()
1354 * $Description: Send a file response to an HTTP request
1357 * (const char *) url . . The URL requested.
1359 * $Return: (int) . . . . . . Always 0.
1361 ****************************************************************************/
1362 static int sendFile(const char *url)
1366 const char * const * table;
1367 const char * try_suffix;
1369 suffix = strrchr(url, '.');
1371 for (table = suffixTable; *table; table += 2)
1372 if(suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1373 try_suffix += strlen(suffix);
1374 if(*try_suffix == 0 || *try_suffix == '.')
1377 /* also, if not found, set default as "application/octet-stream"; */
1378 config->httpd_found.found_mime_type = *(table+1);
1379 #ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1383 for (cur = config->mime_a; cur; cur = cur->next) {
1384 if(strcmp(cur->before_colon, suffix) == 0) {
1385 config->httpd_found.found_mime_type = cur->after_colon;
1390 #endif /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1393 fprintf(stderr, "Sending file '%s' Content-type: %s\n",
1394 url, config->httpd_found.found_mime_type);
1397 f = open(url, O_RDONLY);
1400 char *buf = config->buf;
1402 sendHeaders(HTTP_OK);
1403 while ((count = bb_full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1404 if (bb_full_write(a_c_w, buf, count) != count)
1410 bb_perror_msg("Unable to open '%s'", url);
1412 sendHeaders(HTTP_NOT_FOUND);
1418 static int checkPermIP(void)
1422 /* This could stand some work */
1423 for (cur = config->ip_a_d; cur; cur = cur->next) {
1425 fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1426 fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1427 (unsigned char)(cur->ip >> 24),
1428 (unsigned char)(cur->ip >> 16),
1429 (unsigned char)(cur->ip >> 8),
1431 (unsigned char)(cur->mask >> 24),
1432 (unsigned char)(cur->mask >> 16),
1433 (unsigned char)(cur->mask >> 8),
1436 if((config->rmt_ip & cur->mask) == cur->ip)
1437 return cur->allow_deny == 'A'; /* Allow/Deny */
1440 /* if unconfigured, return 1 - access from all */
1441 return !config->flg_deny_all;
1444 /****************************************************************************
1446 > $Function: checkPerm()
1448 * $Description: Check the permission file for access password protected.
1450 * If config file isn't present, everything is allowed.
1451 * Entries are of the form you can see example from header source
1454 * (const char *) path . . . . The file path.
1455 * (const char *) request . . . User information to validate.
1457 * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
1459 ****************************************************************************/
1461 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1462 static int checkPerm(const char *path, const char *request)
1468 const char *prev = NULL;
1470 /* This could stand some work */
1471 for (cur = config->auth; cur; cur = cur->next) {
1472 p0 = cur->before_colon;
1473 if(prev != NULL && strcmp(prev, p0) != 0)
1474 continue; /* find next identical */
1475 p = cur->after_colon;
1477 fprintf(stderr,"checkPerm: '%s' ? '%s'\n", p0, request);
1480 size_t l = strlen(p0);
1482 if(strncmp(p0, path, l) == 0 &&
1483 (l == 1 || path[l] == '/' || path[l] == 0)) {
1485 /* path match found. Check request */
1486 /* for check next /path:user:password */
1488 u = strchr(request, ':');
1490 /* bad request, ':' required */
1494 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1499 if(strncmp(p, request, u-request) != 0) {
1500 /* user uncompared */
1503 pp = strchr(p, ':');
1504 if(pp && pp[1] == '$' && pp[2] == '1' &&
1505 pp[3] == '$' && pp[4]) {
1507 cipher = pw_encrypt(u+1, pp);
1508 if (strcmp(cipher, pp) == 0)
1509 goto set_remoteuser_var; /* Ok */
1515 if (strcmp(p, request) == 0) {
1516 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1519 config->remoteuser = strdup(request);
1520 if(config->remoteuser)
1521 config->remoteuser[(u - request)] = 0;
1529 return prev == NULL;
1532 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1534 /****************************************************************************
1536 > $Function: handle_sigalrm()
1538 * $Description: Handle timeouts
1540 ****************************************************************************/
1543 handle_sigalrm( int sig )
1545 sendHeaders(HTTP_REQUEST_TIMEOUT);
1546 config->alarm_signaled = sig;
1549 /****************************************************************************
1551 > $Function: handleIncoming()
1553 * $Description: Handle an incoming http request.
1555 ****************************************************************************/
1556 static void handleIncoming(void)
1558 char *buf = config->buf;
1565 #ifdef CONFIG_FEATURE_HTTPD_CGI
1566 const char *prequest = request_GET;
1569 char *content_type = 0;
1571 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1576 struct sigaction sa;
1578 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1579 int credentials = -1; /* if not requred this is Ok */
1582 sa.sa_handler = handle_sigalrm;
1583 sigemptyset(&sa.sa_mask);
1584 sa.sa_flags = 0; /* no SA_RESTART */
1585 sigaction(SIGALRM, &sa, NULL);
1590 (void) alarm( TIMEOUT );
1594 purl = strpbrk(buf, " \t");
1597 sendHeaders(HTTP_BAD_REQUEST);
1601 #ifdef CONFIG_FEATURE_HTTPD_CGI
1602 if(strcasecmp(buf, prequest) != 0) {
1604 if(strcasecmp(buf, prequest) != 0) {
1605 sendHeaders(HTTP_NOT_IMPLEMENTED);
1610 if(strcasecmp(buf, request_GET) != 0) {
1611 sendHeaders(HTTP_NOT_IMPLEMENTED);
1616 count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1618 if (count < 1 || buf[0] != '/') {
1619 /* Garbled request/URL */
1622 url = alloca(strlen(buf) + 12); /* + sizeof("/index.html\0") */
1624 sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1628 /* extract url args if present */
1629 test = strchr(url, '?');
1632 config->query = test;
1635 test = decodeString(url, 0);
1638 if(test == (buf+1)) {
1639 sendHeaders(HTTP_NOT_FOUND);
1642 /* algorithm stolen from libbb bb_simplify_path(),
1643 but don`t strdup and reducing trailing slash and protect out root */
1648 if (*test == '/') { /* skip duplicate (or initial) slash */
1650 } else if (*test == '.') {
1651 if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
1653 } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
1656 /* protect out root */
1659 while (*--purl != '/'); /* omit previous dir */
1667 *++purl = 0; /* so keep last character */
1668 test = purl; /* end ptr */
1670 /* If URL is directory, adding '/' */
1671 if(test[-1] != '/') {
1672 if ( is_directory(url + 1, 1, &sb) ) {
1673 config->httpd_found.found_moved_temporarily = url;
1677 fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1681 ip_allowed = checkPermIP();
1682 while(ip_allowed && (test = strchr( test + 1, '/' )) != NULL) {
1683 /* have path1/path2 */
1685 if( is_directory(url + 1, 1, &sb) ) {
1686 /* may be having subdir config */
1687 parse_conf(url + 1, SUBDIR_PARSE);
1688 ip_allowed = checkPermIP();
1693 // read until blank line for HTTP version specified, else parse immediate
1701 fprintf(stderr, "Header: '%s'\n", buf);
1704 #ifdef CONFIG_FEATURE_HTTPD_CGI
1705 /* try and do our best to parse more lines */
1706 if ((strncasecmp(buf, Content_length, 15) == 0)) {
1707 if(prequest != request_GET)
1708 length = strtol(buf + 15, 0, 0); // extra read only for POST
1709 } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
1710 for(test = buf + 7; isspace(*test); test++)
1712 cookie = strdup(test);
1713 } else if ((strncasecmp(buf, "Content-Type:", 13) == 0)) {
1714 for(test = buf + 13; isspace(*test); test++)
1716 content_type = strdup(test);
1717 } else if ((strncasecmp(buf, "Referer:", 8) == 0)) {
1718 for(test = buf + 8; isspace(*test); test++)
1720 config->referer = strdup(test);
1724 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1725 if (strncasecmp(buf, "Authorization:", 14) == 0) {
1726 /* We only allow Basic credentials.
1727 * It shows up as "Authorization: Basic <userid:password>" where
1728 * the userid:password is base64 encoded.
1730 for(test = buf + 14; isspace(*test); test++)
1732 if (strncasecmp(test, "Basic", 5) != 0)
1735 test += 5; /* decodeBase64() skiping space self */
1737 credentials = checkPerm(url, test);
1739 #endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1741 } /* while extra header reading */
1744 if(config->alarm_signaled)
1747 if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1748 /* protect listing [/path]/httpd_conf or IP deny */
1749 #ifdef CONFIG_FEATURE_HTTPD_CGI
1750 FORBIDDEN: /* protect listing /cgi-bin */
1752 sendHeaders(HTTP_FORBIDDEN);
1756 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1757 if (credentials <= 0 && checkPerm(url, ":") == 0) {
1758 sendHeaders(HTTP_UNAUTHORIZED);
1763 if(config->httpd_found.found_moved_temporarily) {
1764 sendHeaders(HTTP_MOVED_TEMPORARILY);
1766 /* clear unforked memory flag */
1767 config->httpd_found.found_moved_temporarily = NULL;
1772 test = url + 1; /* skip first '/' */
1774 #ifdef CONFIG_FEATURE_HTTPD_CGI
1775 /* if strange Content-Length */
1779 if (strncmp(test, "cgi-bin", 7) == 0) {
1780 if(test[7] == '/' && test[8] == 0)
1781 goto FORBIDDEN; // protect listing cgi-bin/
1782 sendCgi(url, prequest, length, cookie, content_type);
1784 if (prequest != request_GET)
1785 sendHeaders(HTTP_NOT_IMPLEMENTED);
1787 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1789 strcpy(purl, "index.html");
1790 if ( stat(test, &sb ) == 0 ) {
1791 config->ContentLength = sb.st_size;
1792 config->last_mod = sb.st_mtime;
1795 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1796 /* unset if non inetd looped */
1797 config->ContentLength = -1;
1800 #ifdef CONFIG_FEATURE_HTTPD_CGI
1808 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1809 /* from inetd don`t looping: freeing, closing automatic from exit always */
1811 fprintf(stderr, "closing socket\n");
1813 # ifdef CONFIG_FEATURE_HTTPD_CGI
1816 free(config->referer);
1817 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1818 free(config->remoteuser);
1821 shutdown(a_c_w, SHUT_WR);
1823 /* Properly wait for remote to closed */
1825 FD_SET (a_c_w, &s_fd) ;
1830 retval = select (a_c_w + 1, &s_fd, NULL, NULL, &tv);
1831 } while (retval > 0 && (read (a_c_w, buf, sizeof (config->buf)) > 0));
1833 shutdown(a_c_r, SHUT_RD);
1834 close(config->accepted_socket);
1835 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1838 /****************************************************************************
1840 > $Function: miniHttpd()
1842 * $Description: The main http server function.
1844 * Given an open socket fildes, listen for new connections and farm out
1845 * the processing as a forked process.
1848 * (int) server. . . The server socket fildes.
1850 * $Return: (int) . . . . Always 0.
1852 ****************************************************************************/
1853 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1854 static int miniHttpd(int server)
1856 fd_set readfd, portfd;
1859 FD_SET(server, &portfd);
1861 /* copy the ports we are watching to the readfd set */
1865 /* Now wait INDEFINITELY on the set of sockets! */
1866 if (select(server + 1, &readfd, 0, 0, 0) > 0) {
1867 if (FD_ISSET(server, &readfd)) {
1869 struct sockaddr_in fromAddr;
1871 socklen_t fromAddrLen = sizeof(fromAddr);
1872 int s = accept(server,
1873 (struct sockaddr *)&fromAddr, &fromAddrLen);
1878 config->accepted_socket = s;
1879 config->rmt_ip = ntohl(fromAddr.sin_addr.s_addr);
1880 #if ENABLE_FEATURE_HTTPD_CGI || DEBUG
1881 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1882 (unsigned char)(config->rmt_ip >> 24),
1883 (unsigned char)(config->rmt_ip >> 16),
1884 (unsigned char)(config->rmt_ip >> 8),
1885 config->rmt_ip & 0xff);
1886 config->port = ntohs(fromAddr.sin_port);
1888 bb_error_msg("connection from IP=%s, port %u\n",
1889 config->rmt_ip_str, config->port);
1891 #endif /* CONFIG_FEATURE_HTTPD_CGI */
1893 /* set the KEEPALIVE option to cull dead connections */
1895 setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on));
1901 /* This is the spawned thread */
1902 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1903 /* protect reload config, may be confuse checking */
1904 signal(SIGHUP, SIG_IGN);
1921 static int miniHttpd(void)
1923 struct sockaddr_in fromAddrLen;
1924 socklen_t sinlen = sizeof (struct sockaddr_in);
1926 getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen);
1927 config->rmt_ip = ntohl(fromAddrLen.sin_addr.s_addr);
1928 #if ENABLE_FEATURE_HTTPD_CGI
1929 sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1930 (unsigned char)(config->rmt_ip >> 24),
1931 (unsigned char)(config->rmt_ip >> 16),
1932 (unsigned char)(config->rmt_ip >> 8),
1933 config->rmt_ip & 0xff);
1935 config->port = ntohs(fromAddrLen.sin_port);
1939 #endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
1941 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1942 static void sighup_handler(int sig)
1945 struct sigaction sa;
1947 parse_conf(default_path_httpd_conf,
1948 sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1949 sa.sa_handler = sighup_handler;
1950 sigemptyset(&sa.sa_mask);
1951 sa.sa_flags = SA_RESTART;
1952 sigaction(SIGHUP, &sa, NULL);
1957 static const char httpd_opts[]="c:d:h:"
1958 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
1961 #define OPT_INC_1 ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
1963 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1966 #define OPT_INC_2 ENABLE_FEATURE_HTTPD_BASIC_AUTH
1968 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1971 #define OPT_INC_3 ENABLE_FEATURE_HTTPD_AUTH_MD5
1973 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
1976 #ifdef CONFIG_FEATURE_HTTPD_SETUID
1981 #define OPT_CONFIG_FILE (1<<0) /* c */
1982 #define OPT_DECODE_URL (1<<1) /* d */
1983 #define OPT_HOME_HTTPD (1<<2) /* h */
1984 #define OPT_ENCODE_URL (1<<(2+OPT_INC_1)) /* e */
1985 #define OPT_REALM (1<<(2+OPT_INC_1+OPT_INC_2)) /* r */
1986 #define OPT_MD5 (1<<(2+OPT_INC_1+OPT_INC_2+OPT_INC_3)) /* m */
1987 #define OPT_PORT (1<<(3+OPT_INC_1+OPT_INC_2+OPT_INC_3)) /* p */
1988 #define OPT_SETUID (1<<(4+OPT_INC_1+OPT_INC_2+OPT_INC_3)) /* u */
1991 #ifdef HTTPD_STANDALONE
1992 int main(int argc, char *argv[])
1994 int httpd_main(int argc, char *argv[])
1998 const char *home_httpd = home;
1999 char *url_for_decode;
2000 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2001 const char *url_for_encode;
2003 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2008 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2013 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2017 config = xcalloc(1, sizeof(*config));
2018 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
2019 config->realm = "Web Server Authentication";
2022 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2026 config->ContentLength = -1;
2028 opt = bb_getopt_ulflags(argc, argv, httpd_opts,
2029 &(config->configFile), &url_for_decode, &home_httpd
2030 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2033 #ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
2035 # ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2039 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2042 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2047 if(opt & OPT_DECODE_URL) {
2048 printf("%s", decodeString(url_for_decode, 1));
2051 #ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
2052 if(opt & OPT_ENCODE_URL) {
2053 printf("%s", encodeString(url_for_encode));
2057 #ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
2059 printf("%s\n", pw_encrypt(pass, "$1$"));
2063 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2065 config->port = bb_xgetlarg(s_port, 10, 1, 0xffff);
2066 #ifdef CONFIG_FEATURE_HTTPD_SETUID
2067 if(opt & OPT_SETUID) {
2070 uid = strtol(s_uid, &e, 0);
2073 uid = bb_xgetpwnam(s_uid);
2079 if(chdir(home_httpd)) {
2080 bb_perror_msg_and_die("can`t chdir to %s", home_httpd);
2082 #ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2083 server = openServer();
2084 # ifdef CONFIG_FEATURE_HTTPD_SETUID
2085 /* drop privileges */
2091 #ifdef CONFIG_FEATURE_HTTPD_CGI
2093 char *p = getenv("PATH");
2099 setenv("PATH", p, 1);
2100 # ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2101 addEnvPort("SERVER");
2106 #ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2109 parse_conf(default_path_httpd_conf, FIRST_PARSE);
2112 #if !ENABLE_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
2114 if (daemon(1, 0) < 0) /* don`t change curent directory */
2115 bb_perror_msg_and_die("daemon");
2117 return miniHttpd(server);