source: trunk/mindi-busybox/networking/httpd.c @ 904

Last change on this file since 904 was 904, checked in by bruno, 13 years ago

merge -r890:902 $SVN_M/branches/stable

File size: 53.7 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * httpd implementation for busybox
4 *
5 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
6 * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
7 *
8 * simplify patch stolen from libbb without using strdup
9 *
10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 *
12 *****************************************************************************
13 *
14 * Typical usage:
15 *   for non root user
16 * httpd -p 8080 -h $HOME/public_html
17 *   or for daemon start from rc script with uid=0:
18 * httpd -u www
19 * This is equivalent if www user have uid=80 to
20 * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
21 *
22 *
23 * When a url contains "cgi-bin" it is assumed to be a cgi script.  The
24 * server changes directory to the location of the script and executes it
25 * after setting QUERY_STRING and other environment variables.
26 *
27 * The server can also be invoked as a url arg decoder and html text encoder
28 * as follows:
29 *  foo=`httpd -d $foo`           # decode "Hello%20World" as "Hello World"
30 *  bar=`httpd -e "<Hello World>"`  # encode as "&#60Hello&#32World&#62"
31 * Note that url encoding for arguments is not the same as html encoding for
32 * presentation.  -d decodes a url-encoded argument while -e encodes in html
33 * for page display.
34 *
35 * httpd.conf has the following format:
36 *
37 * A:172.20.         # Allow address from 172.20.0.0/16
38 * A:10.0.0.0/25     # Allow any address from 10.0.0.0-10.0.0.127
39 * A:10.0.0.0/255.255.255.128  # Allow any address that previous set
40 * A:127.0.0.1       # Allow local loopback connections
41 * D:*               # Deny from other IP connections
42 * /cgi-bin:foo:bar  # Require user foo, pwd bar on urls starting with /cgi-bin/
43 * /adm:admin:setup  # Require user admin, pwd setup on urls starting with /adm/
44 * /adm:toor:PaSsWd  # or user toor, pwd PaSsWd on urls starting with /adm/
45 * .au:audio/basic   # additional mime type for audio.au files
46 * *.php:/path/php   # running cgi.php scripts through an interpreter
47 *
48 * A/D may be as a/d or allow/deny - first char case insensitive
49 * Deny IP rules take precedence over allow rules.
50 *
51 *
52 * The Deny/Allow IP logic:
53 *
54 *  - Default is to allow all.  No addresses are denied unless
55 *         denied with a D: rule.
56 *  - Order of Deny/Allow rules is significant
57 *  - Deny rules take precedence over allow rules.
58 *  - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
59 *       addresses.
60 *  - Specification of Allow all (A:*) is a no-op
61 *
62 * Example:
63 *   1. Allow only specified addresses
64 *     A:172.20          # Allow any address that begins with 172.20.
65 *     A:10.10.          # Allow any address that begins with 10.10.
66 *     A:127.0.0.1       # Allow local loopback connections
67 *     D:*               # Deny from other IP connections
68 *
69 *   2. Only deny specified addresses
70 *     D:1.2.3.        # deny from 1.2.3.0 - 1.2.3.255
71 *     D:2.3.4.        # deny from 2.3.4.0 - 2.3.4.255
72 *     A:*             # (optional line added for clarity)
73 *
74 * If a sub directory contains a config file it is parsed and merged with
75 * any existing settings as if it was appended to the original configuration.
76 *
77 * subdir paths are relative to the containing subdir and thus cannot
78 * affect the parent rules.
79 *
80 * Note that since the sub dir is parsed in the forked thread servicing the
81 * subdir http request, any merge is discarded when the process exits.  As a
82 * result, the subdir settings only have a lifetime of a single request.
83 *
84 *
85 * If -c is not set, an attempt will be made to open the default
86 * root configuration file.  If -c is set and the file is not found, the
87 * server exits with an error.
88 *
89*/
90
91
92#include <stdio.h>
93#include <ctype.h>         /* for isspace           */
94#include <string.h>
95#include <stdlib.h>        /* for malloc            */
96#include <time.h>
97#include <unistd.h>        /* for close             */
98#include <signal.h>
99#include <sys/types.h>
100#include <sys/socket.h>    /* for connect and socket*/
101#include <netinet/in.h>    /* for sockaddr_in       */
102#include <sys/stat.h>
103#include <sys/wait.h>
104#include <fcntl.h>         /* for open modes        */
105#include "busybox.h"
106
107
108static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
109static const char default_path_httpd_conf[] = "/etc";
110static const char httpd_conf[] = "httpd.conf";
111static const char home[] = "./";
112
113#ifdef CONFIG_LFS
114# define cont_l_fmt "%lld"
115# define cont_l_type (long long)
116#else
117# define cont_l_fmt "%ld"
118# define cont_l_type (long)
119#endif
120
121#define TIMEOUT 60
122
123// Note: busybox xfuncs are not used because we want the server to keep running
124//       if something bad happens due to a malformed user request.
125//       As a result, all memory allocation after daemonize
126//       is checked rigorously
127
128//#define DEBUG 1
129
130#ifndef DEBUG
131# define DEBUG 0
132#endif
133
134#define MAX_MEMORY_BUFF 8192    /* IO buffer */
135
136typedef struct HT_ACCESS {
137    char *after_colon;
138    struct HT_ACCESS *next;
139    char before_colon[1];         /* really bigger, must last */
140} Htaccess;
141
142typedef struct HT_ACCESS_IP {
143    unsigned int ip;
144    unsigned int mask;
145    int allow_deny;
146    struct HT_ACCESS_IP *next;
147} Htaccess_IP;
148
149typedef struct
150{
151  char buf[MAX_MEMORY_BUFF];
152
153  USE_FEATURE_HTTPD_BASIC_AUTH(const char *realm;)
154  USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
155
156  const char *query;
157
158  USE_FEATURE_HTTPD_CGI(char *referer;)
159
160  const char *configFile;
161
162  unsigned int rmt_ip;
163#if defined(CONFIG_FEATURE_HTTPD_CGI) || DEBUG
164  char rmt_ip_str[16];     /* for set env REMOTE_ADDR */
165#endif
166  unsigned port;           /* server initial port and for
167                  set env REMOTE_PORT */
168  union HTTPD_FOUND {
169    const char *found_mime_type;
170    const char *found_moved_temporarily;
171  } httpd_found;
172
173  off_t ContentLength;          /* -1 - unknown */
174  time_t last_mod;
175
176  Htaccess_IP *ip_a_d;          /* config allow/deny lines */
177  int flg_deny_all;
178#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
179  Htaccess *auth;               /* config user:password lines */
180#endif
181#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
182  Htaccess *mime_a;             /* config mime types */
183#endif
184
185#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
186  int accepted_socket;
187# define a_c_r config->accepted_socket
188# define a_c_w config->accepted_socket
189#else
190# define a_c_r 0
191# define a_c_w 1
192#endif
193  volatile int alarm_signaled;
194
195#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
196  Htaccess *script_i;           /* config script interpreters */
197#endif
198} HttpdConfig;
199
200static HttpdConfig *config;
201
202static const char request_GET[] = "GET";    /* size algorithmic optimize */
203
204static const char* const suffixTable [] = {
205/* Warning: shorted equivalent suffix in one line must be first */
206  ".htm.html", "text/html",
207  ".jpg.jpeg", "image/jpeg",
208  ".gif", "image/gif",
209  ".png", "image/png",
210  ".txt.h.c.cc.cpp", "text/plain",
211  ".css", "text/css",
212  ".wav", "audio/wav",
213  ".avi", "video/x-msvideo",
214  ".qt.mov", "video/quicktime",
215  ".mpe.mpeg", "video/mpeg",
216  ".mid.midi", "audio/midi",
217  ".mp3", "audio/mpeg",
218#if 0                        /* unpopular */
219  ".au", "audio/basic",
220  ".pac", "application/x-ns-proxy-autoconfig",
221  ".vrml.wrl", "model/vrml",
222#endif
223  0, "application/octet-stream" /* default */
224  };
225
226typedef enum
227{
228  HTTP_OK = 200,
229  HTTP_MOVED_TEMPORARILY = 302,
230  HTTP_BAD_REQUEST = 400,       /* malformed syntax */
231  HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
232  HTTP_NOT_FOUND = 404,
233  HTTP_FORBIDDEN = 403,
234  HTTP_REQUEST_TIMEOUT = 408,
235  HTTP_NOT_IMPLEMENTED = 501,   /* used for unrecognized requests */
236  HTTP_INTERNAL_SERVER_ERROR = 500,
237#if 0 /* future use */
238  HTTP_CONTINUE = 100,
239  HTTP_SWITCHING_PROTOCOLS = 101,
240  HTTP_CREATED = 201,
241  HTTP_ACCEPTED = 202,
242  HTTP_NON_AUTHORITATIVE_INFO = 203,
243  HTTP_NO_CONTENT = 204,
244  HTTP_MULTIPLE_CHOICES = 300,
245  HTTP_MOVED_PERMANENTLY = 301,
246  HTTP_NOT_MODIFIED = 304,
247  HTTP_PAYMENT_REQUIRED = 402,
248  HTTP_BAD_GATEWAY = 502,
249  HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
250  HTTP_RESPONSE_SETSIZE=0xffffffff
251#endif
252} HttpResponseNum;
253
254typedef struct
255{
256  HttpResponseNum type;
257  const char *name;
258  const char *info;
259} HttpEnumString;
260
261static const HttpEnumString httpResponseNames[] = {
262  { HTTP_OK, "OK", NULL },
263  { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
264  { HTTP_REQUEST_TIMEOUT, "Request Timeout",
265    "No request appeared within a reasonable time period." },
266  { HTTP_NOT_IMPLEMENTED, "Not Implemented",
267    "The requested method is not recognized by this server." },
268#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
269  { HTTP_UNAUTHORIZED, "Unauthorized", "" },
270#endif
271  { HTTP_NOT_FOUND, "Not Found",
272    "The requested URL was not found on this server." },
273  { HTTP_BAD_REQUEST, "Bad Request", "Unsupported method." },
274  { HTTP_FORBIDDEN, "Forbidden", "" },
275  { HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error",
276    "Internal Server Error" },
277#if 0                               /* not implemented */
278  { HTTP_CREATED, "Created" },
279  { HTTP_ACCEPTED, "Accepted" },
280  { HTTP_NO_CONTENT, "No Content" },
281  { HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
282  { HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
283  { HTTP_NOT_MODIFIED, "Not Modified" },
284  { HTTP_BAD_GATEWAY, "Bad Gateway", "" },
285  { HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
286#endif
287};
288
289
290static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
291static const char Content_length[] = "Content-length:";
292
293
294static int
295scan_ip (const char **ep, unsigned int *ip, unsigned char endc)
296{
297  const char *p = *ep;
298  int auto_mask = 8;
299  int j;
300
301  *ip = 0;
302  for (j = 0; j < 4; j++) {
303    unsigned int octet;
304
305    if ((*p < '0' || *p > '9') && (*p != '/' || j == 0) && *p != 0)
306      return -auto_mask;
307    octet = 0;
308    while (*p >= '0' && *p <= '9') {
309      octet *= 10;
310      octet += *p - '0';
311      if (octet > 255)
312        return -auto_mask;
313      p++;
314    }
315    if (*p == '.')
316      p++;
317    if (*p != '/' && *p != 0)
318      auto_mask += 8;
319    *ip = ((*ip) << 8) | octet;
320  }
321  if (*p != 0) {
322    if (*p != endc)
323        return -auto_mask;
324    p++;
325    if(*p == 0)
326        return -auto_mask;
327  }
328  *ep = p;
329  return auto_mask;
330}
331
332static int
333scan_ip_mask (const char *ipm, unsigned int *ip, unsigned int *mask)
334{
335  int i;
336  unsigned int msk;
337
338  i = scan_ip(&ipm, ip, '/');
339  if(i < 0)
340    return i;
341  if(*ipm) {
342    const char *p = ipm;
343
344    i = 0;
345    while (*p) {
346        if (*p < '0' || *p > '9') {
347            if (*p == '.') {
348                i = scan_ip (&ipm, mask, 0);
349                return i != 32;
350            }
351            return -1;
352        }
353        i *= 10;
354        i += *p - '0';
355        p++;
356    }
357  }
358  if (i > 32 || i < 0)
359      return -1;
360  msk = 0x80000000;
361  *mask = 0;
362  while (i > 0) {
363    *mask |= msk;
364    msk >>= 1;
365    i--;
366  }
367  return 0;
368}
369
370#if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES)
371static void free_config_lines(Htaccess **pprev)
372{
373    Htaccess *prev = *pprev;
374
375    while( prev ) {
376    Htaccess *cur = prev;
377
378    prev = cur->next;
379    free(cur);
380    }
381    *pprev = NULL;
382}
383#endif
384
385/* flag */
386#define FIRST_PARSE          0
387#define SUBDIR_PARSE         1
388#define SIGNALED_PARSE       2
389#define FIND_FROM_HTTPD_ROOT 3
390/****************************************************************************
391 *
392 > $Function: parse_conf()
393 *
394 * $Description: parse configuration file into in-memory linked list.
395 *
396 * The first non-white character is examined to determine if the config line
397 * is one of the following:
398 *    .ext:mime/type   # new mime type not compiled into httpd
399 *    [adAD]:from      # ip address allow/deny, * for wildcard
400 *    /path:user:pass  # username/password
401 *
402 * Any previous IP rules are discarded.
403 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
404 * are also discarded.  That is, previous settings are retained if flag is
405 * SUBDIR_PARSE.
406 *
407 * $Parameters:
408 *      (const char *) path . . null for ip address checks, path for password
409 *                              checks.
410 *      (int) flag  . . . . . . the source of the parse request.
411 *
412 * $Return: (None)
413 *
414 ****************************************************************************/
415static void parse_conf(const char *path, int flag)
416{
417    FILE *f;
418#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
419    Htaccess *prev, *cur;
420#elif CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
421    Htaccess *cur;
422#endif
423
424    const char *cf = config->configFile;
425    char buf[160];
426    char *p0 = NULL;
427    char *c, *p;
428
429    /* free previous ip setup if present */
430    Htaccess_IP *pip = config->ip_a_d;
431
432    while( pip ) {
433    Htaccess_IP *cur_ipl = pip;
434
435    pip = cur_ipl->next;
436    free(cur_ipl);
437    }
438    config->ip_a_d = NULL;
439
440    config->flg_deny_all = 0;
441
442#if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR)
443    /* retain previous auth and mime config only for subdir parse */
444    if(flag != SUBDIR_PARSE) {
445#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
446    free_config_lines(&config->auth);
447#endif
448#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
449    free_config_lines(&config->mime_a);
450#endif
451#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
452    free_config_lines(&config->script_i);
453#endif
454    }
455#endif
456
457    if(flag == SUBDIR_PARSE || cf == NULL) {
458    cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
459    if(cf == NULL) {
460        if(flag == FIRST_PARSE)
461        bb_error_msg_and_die(bb_msg_memory_exhausted);
462        return;
463    }
464    sprintf((char *)cf, "%s/%s", path, httpd_conf);
465    }
466
467    while((f = fopen(cf, "r")) == NULL) {
468    if(flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
469        /* config file not found, no changes to config */
470        return;
471    }
472    if(config->configFile && flag == FIRST_PARSE) /* if -c option given */
473        bb_perror_msg_and_die("%s", cf);
474    flag = FIND_FROM_HTTPD_ROOT;
475    cf = httpd_conf;
476    }
477
478#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
479    prev = config->auth;
480#endif
481    /* This could stand some work */
482    while ( (p0 = fgets(buf, sizeof(buf), f)) != NULL) {
483    c = NULL;
484    for(p = p0; *p0 != 0 && *p0 != '#'; p0++) {
485        if(!isspace(*p0)) {
486            *p++ = *p0;
487            if(*p0 == ':' && c == NULL)
488            c = p;
489        }
490    }
491    *p = 0;
492
493    /* test for empty or strange line */
494    if (c == NULL || *c == 0)
495        continue;
496    p0 = buf;
497    if(*p0 == 'd')
498        *p0 = 'D';
499    if(*c == '*') {
500        if(*p0 == 'D') {
501        /* memorize deny all */
502        config->flg_deny_all++;
503        }
504        /* skip default other "word:*" config lines */
505        continue;
506    }
507
508    if(*p0 == 'a')
509        *p0 = 'A';
510    else if(*p0 != 'D' && *p0 != 'A'
511#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
512       && *p0 != '/'
513#endif
514#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
515       && *p0 != '.'
516#endif
517#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
518       && *p0 != '*'
519#endif
520      )
521           continue;
522    if(*p0 == 'A' || *p0 == 'D') {
523        /* storing current config IP line */
524        pip = calloc(1, sizeof(Htaccess_IP));
525        if(pip) {
526            if(scan_ip_mask (c, &(pip->ip), &(pip->mask))) {
527            /* syntax IP{/mask} error detected, protect all */
528            *p0 = 'D';
529            pip->mask = 0;
530            }
531            pip->allow_deny = *p0;
532            if(*p0 == 'D') {
533            /* Deny:form_IP move top */
534            pip->next = config->ip_a_d;
535            config->ip_a_d = pip;
536            } else {
537            /* add to bottom A:form_IP config line */
538            Htaccess_IP *prev_IP = config->ip_a_d;
539
540            if(prev_IP == NULL) {
541                config->ip_a_d = pip;
542            } else {
543                while(prev_IP->next)
544                    prev_IP = prev_IP->next;
545                prev_IP->next = pip;
546            }
547            }
548        }
549        continue;
550    }
551#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
552    if(*p0 == '/') {
553        /* make full path from httpd root / curent_path / config_line_path */
554        cf = flag == SUBDIR_PARSE ? path : "";
555        p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
556        if(p0 == NULL)
557        continue;
558        c[-1] = 0;
559        sprintf(p0, "/%s%s", cf, buf);
560
561        /* another call bb_simplify_path */
562        cf = p = p0;
563
564        do {
565            if (*p == '/') {
566            if (*cf == '/') {    /* skip duplicate (or initial) slash */
567                continue;
568            } else if (*cf == '.') {
569                if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
570                continue;
571                } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
572                ++cf;
573                if (p > p0) {
574                    while (*--p != '/');    /* omit previous dir */
575                }
576                continue;
577                }
578            }
579            }
580            *++p = *cf;
581        } while (*++cf);
582
583        if ((p == p0) || (*p != '/')) {      /* not a trailing slash */
584        ++p;                             /* so keep last character */
585        }
586        *p = 0;
587        sprintf(p0, "%s:%s", p0, c);
588    }
589#endif
590
591#if defined(CONFIG_FEATURE_HTTPD_BASIC_AUTH) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES) || defined(CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR)
592    /* storing current config line */
593    cur = calloc(1, sizeof(Htaccess) + strlen(p0));
594    if(cur) {
595        cf = strcpy(cur->before_colon, p0);
596        c = strchr(cf, ':');
597        *c++ = 0;
598        cur->after_colon = c;
599#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
600        if(*cf == '.') {
601        /* config .mime line move top for overwrite previous */
602        cur->next = config->mime_a;
603        config->mime_a = cur;
604        continue;
605        }
606#endif
607#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
608        if(*cf == '*' && cf[1] == '.') {
609        /* config script interpreter line move top for overwrite previous */
610        cur->next = config->script_i;
611        config->script_i = cur;
612        continue;
613        }
614#endif
615#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
616        free(p0);
617        if(prev == NULL) {
618        /* first line */
619        config->auth = prev = cur;
620        } else {
621        /* sort path, if current lenght eq or bigger then move up */
622        Htaccess *prev_hti = config->auth;
623        size_t l = strlen(cf);
624        Htaccess *hti;
625
626        for(hti = prev_hti; hti; hti = hti->next) {
627            if(l >= strlen(hti->before_colon)) {
628            /* insert before hti */
629            cur->next = hti;
630            if(prev_hti != hti) {
631                prev_hti->next = cur;
632            } else {
633                /* insert as top */
634                config->auth = cur;
635            }
636            break;
637            }
638            if(prev_hti != hti)
639                prev_hti = prev_hti->next;
640        }
641        if(!hti)  {       /* not inserted, add to bottom */
642            prev->next = cur;
643            prev = cur;
644        }
645        }
646#endif
647    }
648#endif
649   }
650   fclose(f);
651}
652
653#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
654/****************************************************************************
655 *
656 > $Function: encodeString()
657 *
658 * $Description: Given a string, html encode special characters.
659 *   This is used for the -e command line option to provide an easy way
660 *   for scripts to encode result data without confusing browsers.  The
661 *   returned string pointer is memory allocated by malloc().
662 *
663 * $Parameters:
664 *      (const char *) string . . The first string to encode.
665 *
666 * $Return: (char *) . . . .. . . A pointer to the encoded string.
667 *
668 * $Errors: Returns a null string ("") if memory is not available.
669 *
670 ****************************************************************************/
671static char *encodeString(const char *string)
672{
673  /* take the simple route and encode everything */
674  /* could possibly scan once to get length.     */
675  int len = strlen(string);
676  char *out = malloc(len * 6 + 1);
677  char *p=out;
678  char ch;
679
680  if (!out) return "";
681  while ((ch = *string++)) {
682    // very simple check for what to encode
683    if (isalnum(ch)) *p++ = ch;
684    else p += sprintf(p, "&#%d;", (unsigned char) ch);
685  }
686  *p=0;
687  return out;
688}
689#endif          /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */
690
691/****************************************************************************
692 *
693 > $Function: decodeString()
694 *
695 * $Description: Given a URL encoded string, convert it to plain ascii.
696 *   Since decoding always makes strings smaller, the decode is done in-place.
697 *   Thus, callers should strdup() the argument if they do not want the
698 *   argument modified.  The return is the original pointer, allowing this
699 *   function to be easily used as arguments to other functions.
700 *
701 * $Parameters:
702 *      (char *) string . . . The first string to decode.
703 *      (int)    flag   . . . 1 if require decode '+' as ' ' for CGI
704 *
705 * $Return: (char *)  . . . . A pointer to the decoded string (same as input).
706 *
707 * $Errors: None
708 *
709 ****************************************************************************/
710static char *decodeString(char *orig, int flag_plus_to_space)
711{
712  /* note that decoded string is always shorter than original */
713  char *string = orig;
714  char *ptr = string;
715
716  while (*ptr)
717  {
718    if (*ptr == '+' && flag_plus_to_space)    { *string++ = ' '; ptr++; }
719    else if (*ptr != '%') *string++ = *ptr++;
720    else  {
721      unsigned int value1, value2;
722
723      ptr++;
724      if(sscanf(ptr, "%1X", &value1) != 1 ||
725                sscanf(ptr+1, "%1X", &value2) != 1) {
726    if(!flag_plus_to_space)
727        return NULL;
728    *string++ = '%';
729      } else {
730    value1 = value1 * 16 + value2;
731    if(value1 == '/' || value1 == 0)
732        return orig+1;
733    *string++ = value1;
734    ptr += 2;
735      }
736    }
737  }
738  *string = '\0';
739  return orig;
740}
741
742
743#ifdef CONFIG_FEATURE_HTTPD_CGI
744/****************************************************************************
745 *
746 > $Function: addEnv()
747 *
748 * $Description: Add an environment variable setting to the global list.
749 *    A NAME=VALUE string is allocated, filled, and added to the list of
750 *    environment settings passed to the cgi execution script.
751 *
752 * $Parameters:
753 *  (char *) name_before_underline - The first part environment variable name.
754 *  (char *) name_after_underline  - The second part environment variable name.
755 *  (char *) value  . . The value to which the env variable is set.
756 *
757 * $Return: (void)
758 *
759 * $Errors: Silently returns if the env runs out of space to hold the new item
760 *
761 ****************************************************************************/
762static void addEnv(const char *name_before_underline,
763            const char *name_after_underline, const char *value)
764{
765  char *s = NULL;
766  const char *underline;
767
768  if (!value)
769    value = "";
770  underline = *name_after_underline ? "_" : "";
771  asprintf(&s, "%s%s%s=%s", name_before_underline, underline,
772                    name_after_underline, value);
773  if(s) {
774    putenv(s);
775  }
776}
777
778#if defined(CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV) || defined(CONFIG_FEATURE_HTTPD_WITHOUT_INETD)
779/* set environs SERVER_PORT and REMOTE_PORT */
780static void addEnvPort(const char *port_name)
781{
782      char buf[16];
783
784      sprintf(buf, "%u", config->port);
785      addEnv(port_name, "PORT", buf);
786}
787#endif
788#endif          /* CONFIG_FEATURE_HTTPD_CGI */
789
790
791#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
792/****************************************************************************
793 *
794 > $Function: decodeBase64()
795 *
796 > $Description: Decode a base 64 data stream as per rfc1521.
797 *    Note that the rfc states that none base64 chars are to be ignored.
798 *    Since the decode always results in a shorter size than the input, it is
799 *    OK to pass the input arg as an output arg.
800 *
801 * $Parameter:
802 *      (char *) Data . . . . A pointer to a base64 encoded string.
803 *                            Where to place the decoded data.
804 *
805 * $Return: void
806 *
807 * $Errors: None
808 *
809 ****************************************************************************/
810static void decodeBase64(char *Data)
811{
812
813  const unsigned char *in = (const unsigned char *)Data;
814  // The decoded size will be at most 3/4 the size of the encoded
815  unsigned long ch = 0;
816  int i = 0;
817
818  while (*in) {
819    int t = *in++;
820
821    if(t >= '0' && t <= '9')
822    t = t - '0' + 52;
823    else if(t >= 'A' && t <= 'Z')
824    t = t - 'A';
825    else if(t >= 'a' && t <= 'z')
826    t = t - 'a' + 26;
827    else if(t == '+')
828    t = 62;
829    else if(t == '/')
830    t = 63;
831    else if(t == '=')
832    t = 0;
833    else
834    continue;
835
836    ch = (ch << 6) | t;
837    i++;
838    if (i == 4) {
839    *Data++ = (char) (ch >> 16);
840    *Data++ = (char) (ch >> 8);
841    *Data++ = (char) ch;
842    i = 0;
843    }
844  }
845  *Data = 0;
846}
847#endif
848
849
850#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
851/****************************************************************************
852 *
853 > $Function: openServer()
854 *
855 * $Description: create a listen server socket on the designated port.
856 *
857 * $Return: (int)  . . . A connection socket. -1 for errors.
858 *
859 * $Errors: None
860 *
861 ****************************************************************************/
862static int openServer(void)
863{
864  struct sockaddr_in lsocket;
865  int fd;
866  int on = 1;
867
868  /* create the socket right now */
869  /* inet_addr() returns a value that is already in network order */
870  memset(&lsocket, 0, sizeof(lsocket));
871  lsocket.sin_family = AF_INET;
872  lsocket.sin_addr.s_addr = INADDR_ANY;
873  lsocket.sin_port = htons(config->port);
874  fd = bb_xsocket(AF_INET, SOCK_STREAM, 0);
875  /* tell the OS it's OK to reuse a previous address even though */
876  /* it may still be in a close down state.  Allows bind to succeed. */
877#ifdef SO_REUSEPORT
878  setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ;
879#else
880  setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ;
881#endif
882  bb_xbind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket));
883  listen(fd, 9); /* bb_xlisten? */
884  signal(SIGCHLD, SIG_IGN);   /* prevent zombie (defunct) processes */
885  return fd;
886}
887#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
888
889/****************************************************************************
890 *
891 > $Function: sendHeaders()
892 *
893 * $Description: Create and send HTTP response headers.
894 *   The arguments are combined and sent as one write operation.  Note that
895 *   IE will puke big-time if the headers are not sent in one packet and the
896 *   second packet is delayed for any reason.
897 *
898 * $Parameter:
899 *      (HttpResponseNum) responseNum . . . The result code to send.
900 *
901 * $Return: (int)  . . . . writing errors
902 *
903 ****************************************************************************/
904static int sendHeaders(HttpResponseNum responseNum)
905{
906  char *buf = config->buf;
907  const char *responseString = "";
908  const char *infoString = 0;
909  const char *mime_type;
910  unsigned int i;
911  time_t timer = time(0);
912  char timeStr[80];
913  int len;
914
915  for (i = 0;
916    i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
917        if (httpResponseNames[i].type == responseNum) {
918            responseString = httpResponseNames[i].name;
919            infoString = httpResponseNames[i].info;
920            break;
921        }
922  }
923  /* error message is HTML */
924  mime_type = responseNum == HTTP_OK ?
925        config->httpd_found.found_mime_type : "text/html";
926
927  /* emit the current date */
928  strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
929  len = sprintf(buf,
930    "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
931    "Date: %s\r\nConnection: close\r\n",
932      responseNum, responseString, mime_type, timeStr);
933
934#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
935  if (responseNum == HTTP_UNAUTHORIZED) {
936    len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
937                                config->realm);
938  }
939#endif
940  if(responseNum == HTTP_MOVED_TEMPORARILY) {
941    len += sprintf(buf+len, "Location: %s/%s%s\r\n",
942        config->httpd_found.found_moved_temporarily,
943        (config->query ? "?" : ""),
944        (config->query ? config->query : ""));
945  }
946
947  if (config->ContentLength != -1) {    /* file */
948    strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
949    len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n",
950                  timeStr, Content_length, cont_l_type config->ContentLength);
951  }
952  strcat(buf, "\r\n");
953  len += 2;
954  if (infoString) {
955    len += sprintf(buf+len,
956        "<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
957        "<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
958        responseNum, responseString,
959        responseNum, responseString, infoString);
960  }
961#if DEBUG
962  fprintf(stderr, "Headers: '%s'", buf);
963#endif
964  return bb_full_write(a_c_w, buf, len);
965}
966
967/****************************************************************************
968 *
969 > $Function: getLine()
970 *
971 * $Description: Read from the socket until an end of line char found.
972 *
973 *   Characters are read one at a time until an eol sequence is found.
974 *
975 * $Return: (int) . . . . number of characters read.  -1 if error.
976 *
977 ****************************************************************************/
978static int getLine(void)
979{
980  int  count = 0;
981  char *buf = config->buf;
982
983  while (read(a_c_r, buf + count, 1) == 1) {
984    if (buf[count] == '\r') continue;
985    if (buf[count] == '\n') {
986      buf[count] = 0;
987      return count;
988    }
989    if(count < (MAX_MEMORY_BUFF-1))      /* check owerflow */
990    count++;
991  }
992  if (count) return count;
993  else return -1;
994}
995
996#ifdef CONFIG_FEATURE_HTTPD_CGI
997/****************************************************************************
998 *
999 > $Function: sendCgi()
1000 *
1001 * $Description: Execute a CGI script and send it's stdout back
1002 *
1003 *   Environment variables are set up and the script is invoked with pipes
1004 *   for stdin/stdout.  If a post is being done the script is fed the POST
1005 *   data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1006 *
1007 * $Parameters:
1008 *      (const char *) url . . . . . . The requested URL (with leading /).
1009 *      (int bodyLen)  . . . . . . . . Length of the post body.
1010 *      (const char *cookie) . . . . . For set HTTP_COOKIE.
1011 *      (const char *content_type) . . For set CONTENT_TYPE.
1012
1013 *
1014 * $Return: (char *)  . . . . A pointer to the decoded string (same as input).
1015 *
1016 * $Errors: None
1017 *
1018 ****************************************************************************/
1019static int sendCgi(const char *url,
1020           const char *request, int bodyLen, const char *cookie,
1021           const char *content_type)
1022{
1023  int fromCgi[2];  /* pipe for reading data from CGI */
1024  int toCgi[2];    /* pipe for sending data to CGI */
1025
1026  static char * argp[] = { 0, 0 };
1027  int pid = 0;
1028  int inFd;
1029  int outFd;
1030  int firstLine = 1;
1031
1032  do {
1033    if (pipe(fromCgi) != 0) {
1034      break;
1035    }
1036    if (pipe(toCgi) != 0) {
1037      break;
1038    }
1039
1040    pid = fork();
1041    if (pid < 0) {
1042    pid = 0;
1043    break;
1044    }
1045
1046    if (!pid) {
1047      /* child process */
1048      char *script;
1049      char *purl = strdup( url );
1050      char realpath_buff[MAXPATHLEN];
1051
1052      if(purl == NULL)
1053    _exit(242);
1054
1055      inFd  = toCgi[0];
1056      outFd = fromCgi[1];
1057
1058      dup2(inFd, 0);  // replace stdin with the pipe
1059      dup2(outFd, 1);  // replace stdout with the pipe
1060      if(!DEBUG)
1061    dup2(outFd, 2);  // replace stderr with the pipe
1062
1063      close(toCgi[0]);
1064      close(toCgi[1]);
1065      close(fromCgi[0]);
1066      close(fromCgi[1]);
1067
1068      /*
1069       * Find PATH_INFO.
1070       */
1071      script = purl;
1072      while((script = strchr( script + 1, '/' )) != NULL) {
1073    /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
1074    struct stat sb;
1075
1076    *script = '\0';
1077    if(is_directory(purl + 1, 1, &sb) == 0) {
1078        /* not directory, found script.cgi/PATH_INFO */
1079        *script = '/';
1080        break;
1081    }
1082    *script = '/';          /* is directory, find next '/' */
1083      }
1084      addEnv("PATH", "INFO", script);   /* set /PATH_INFO or NULL */
1085      addEnv("PATH",           "",         getenv("PATH"));
1086      addEnv("REQUEST",        "METHOD",   request);
1087      if(config->query) {
1088    char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
1089    if(uri)
1090        sprintf(uri, "%s?%s", purl, config->query);
1091    addEnv("REQUEST",        "URI",   uri);
1092      } else {
1093    addEnv("REQUEST",        "URI",   purl);
1094      }
1095      if(script != NULL)
1096    *script = '\0';         /* reduce /PATH_INFO */
1097       /* SCRIPT_FILENAME required by PHP in CGI mode */
1098       if(realpath(purl + 1, realpath_buff))
1099     addEnv("SCRIPT", "FILENAME", realpath_buff);
1100       else
1101     *realpath_buff = 0;
1102      /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1103      addEnv("SCRIPT_NAME",    "",         purl);
1104      addEnv("QUERY_STRING",   "",         config->query);
1105      addEnv("SERVER",         "SOFTWARE", httpdVersion);
1106      addEnv("SERVER",         "PROTOCOL", "HTTP/1.0");
1107      addEnv("GATEWAY_INTERFACE", "",      "CGI/1.1");
1108      addEnv("REMOTE",         "ADDR",     config->rmt_ip_str);
1109#ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1110      addEnvPort("REMOTE");
1111#endif
1112      if(bodyLen) {
1113    char sbl[32];
1114
1115    sprintf(sbl, "%d", bodyLen);
1116    addEnv("CONTENT", "LENGTH", sbl);
1117      }
1118      if(cookie)
1119    addEnv("HTTP", "COOKIE", cookie);
1120      if(content_type)
1121    addEnv("CONTENT", "TYPE", content_type);
1122#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1123      if(config->remoteuser) {
1124    addEnv("REMOTE", "USER", config->remoteuser);
1125    addEnv("AUTH_TYPE", "", "Basic");
1126      }
1127#endif
1128      if(config->referer)
1129    addEnv("HTTP", "REFERER", config->referer);
1130
1131    /* set execve argp[0] without path */
1132      argp[0] = strrchr( purl, '/' ) + 1;
1133    /* but script argp[0] must have absolute path and chdiring to this */
1134      if(*realpath_buff) {
1135        script = strrchr(realpath_buff, '/');
1136        if(script) {
1137        *script = '\0';
1138        if(chdir(realpath_buff) == 0) {
1139          // now run the program.  If it fails,
1140          // use _exit() so no destructors
1141          // get called and make a mess.
1142#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1143          char *interpr = NULL;
1144          char *suffix = strrchr(purl, '.');
1145
1146          if(suffix) {
1147            Htaccess * cur;
1148            for (cur = config->script_i; cur; cur = cur->next)
1149                if(strcmp(cur->before_colon + 1, suffix) == 0) {
1150                    interpr = cur->after_colon;
1151                    break;
1152                }
1153          }
1154#endif
1155          *script = '/';
1156#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1157          if (interpr)
1158            execv(interpr, argp);
1159          else
1160#endif
1161            execv(realpath_buff, argp);
1162        }
1163        }
1164      }
1165#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1166      config->accepted_socket = 1;      /* send to stdout */
1167#endif
1168      sendHeaders(HTTP_NOT_FOUND);
1169      _exit(242);
1170    } /* end child */
1171
1172  } while (0);
1173
1174  if (pid) {
1175    /* parent process */
1176    int status;
1177    size_t post_readed_size = 0, post_readed_idx = 0;
1178
1179    inFd  = fromCgi[0];
1180    outFd = toCgi[1];
1181    close(fromCgi[1]);
1182    close(toCgi[0]);
1183    signal(SIGPIPE, SIG_IGN);
1184
1185    while (1) {
1186      fd_set readSet;
1187      fd_set writeSet;
1188      char wbuf[128];
1189      int nfound;
1190      int count;
1191
1192      FD_ZERO(&readSet);
1193      FD_ZERO(&writeSet);
1194      FD_SET(inFd, &readSet);
1195      if(bodyLen > 0 || post_readed_size > 0) {
1196    FD_SET(outFd, &writeSet);
1197    nfound = outFd > inFd ? outFd : inFd;
1198    if(post_readed_size == 0) {
1199        FD_SET(a_c_r, &readSet);
1200        if(nfound < a_c_r)
1201            nfound = a_c_r;
1202    }
1203      /* Now wait on the set of sockets! */
1204    nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
1205      } else {
1206    if(!bodyLen) {
1207        close(outFd);
1208        bodyLen = -1;
1209    }
1210    nfound = select(inFd + 1, &readSet, 0, 0, NULL);
1211      }
1212
1213      if (nfound <= 0) {
1214    if (waitpid(pid, &status, WNOHANG) > 0) {
1215      close(inFd);
1216#if DEBUG
1217      if (WIFEXITED(status))
1218          bb_error_msg("piped has exited with status=%d", WEXITSTATUS(status));
1219      if (WIFSIGNALED(status))
1220          bb_error_msg("piped has exited with signal=%d", WTERMSIG(status));
1221#endif
1222      break;
1223    }
1224      } else if(post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
1225        count = bb_full_write(outFd, wbuf + post_readed_idx, post_readed_size);
1226        if(count > 0) {
1227            post_readed_size -= count;
1228            post_readed_idx += count;
1229            if(post_readed_size == 0)
1230                post_readed_idx = 0;
1231        } else {
1232            post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
1233        }
1234      } else if(bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
1235        count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
1236        count = safe_read(a_c_r, wbuf, count);
1237        if(count > 0) {
1238            post_readed_size += count;
1239            bodyLen -= count;
1240        } else {
1241            bodyLen = 0;    /* closed */
1242        }
1243      }
1244      if(FD_ISSET(inFd, &readSet)) {
1245    int s = a_c_w;
1246    char *rbuf = config->buf;
1247
1248#ifndef PIPE_BUF
1249# define PIPESIZE 4096          /* amount of buffering in a pipe */
1250#else
1251# define PIPESIZE PIPE_BUF
1252#endif
1253#if PIPESIZE >= MAX_MEMORY_BUFF
1254# error "PIPESIZE >= MAX_MEMORY_BUFF"
1255#endif
1256
1257    // There is something to read
1258    count = safe_read(inFd, rbuf, PIPESIZE);
1259    if (count == 0)
1260        break;  /* closed */
1261    if (count > 0) {
1262      if (firstLine) {
1263        rbuf[count] = 0;
1264        /* check to see if the user script added headers */
1265        if(strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
1266          bb_full_write(s, "HTTP/1.0 200 OK\r\n", 17);
1267        }
1268        if (strstr(rbuf, "ontent-") == 0) {
1269          bb_full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1270        }
1271        firstLine = 0;
1272      }
1273      if (bb_full_write(s, rbuf, count) != count)
1274          break;
1275
1276#if DEBUG
1277      fprintf(stderr, "cgi read %d bytes\n", count);
1278#endif
1279    }
1280      }
1281    }
1282  }
1283  return 0;
1284}
1285#endif          /* CONFIG_FEATURE_HTTPD_CGI */
1286
1287/****************************************************************************
1288 *
1289 > $Function: sendFile()
1290 *
1291 * $Description: Send a file response to an HTTP request
1292 *
1293 * $Parameter:
1294 *      (const char *) url . . The URL requested.
1295 *
1296 * $Return: (int)  . . . . . . Always 0.
1297 *
1298 ****************************************************************************/
1299static int sendFile(const char *url)
1300{
1301  char * suffix;
1302  int  f;
1303  const char * const * table;
1304  const char * try_suffix;
1305
1306  suffix = strrchr(url, '.');
1307
1308  for (table = suffixTable; *table; table += 2)
1309    if(suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
1310        try_suffix += strlen(suffix);
1311        if(*try_suffix == 0 || *try_suffix == '.')
1312            break;
1313    }
1314  /* also, if not found, set default as "application/octet-stream";  */
1315  config->httpd_found.found_mime_type = *(table+1);
1316#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
1317  if (suffix) {
1318    Htaccess * cur;
1319
1320    for (cur = config->mime_a; cur; cur = cur->next) {
1321    if(strcmp(cur->before_colon, suffix) == 0) {
1322        config->httpd_found.found_mime_type = cur->after_colon;
1323        break;
1324    }
1325    }
1326  }
1327#endif  /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
1328
1329#if DEBUG
1330  fprintf(stderr, "Sending file '%s' Content-type: %s\n",
1331            url, config->httpd_found.found_mime_type);
1332#endif
1333
1334  f = open(url, O_RDONLY);
1335  if (f >= 0) {
1336    int count;
1337    char *buf = config->buf;
1338
1339    sendHeaders(HTTP_OK);
1340    while ((count = bb_full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
1341        if (bb_full_write(a_c_w, buf, count) != count)
1342            break;
1343    }
1344    close(f);
1345  } else {
1346#if DEBUG
1347    bb_perror_msg("Unable to open '%s'", url);
1348#endif
1349    sendHeaders(HTTP_NOT_FOUND);
1350  }
1351
1352  return 0;
1353}
1354
1355static int checkPermIP(void)
1356{
1357    Htaccess_IP * cur;
1358
1359    /* This could stand some work */
1360    for (cur = config->ip_a_d; cur; cur = cur->next) {
1361#if DEBUG
1362    fprintf(stderr, "checkPermIP: '%s' ? ", config->rmt_ip_str);
1363    fprintf(stderr, "'%u.%u.%u.%u/%u.%u.%u.%u'\n",
1364        (unsigned char)(cur->ip >> 24),
1365        (unsigned char)(cur->ip >> 16),
1366        (unsigned char)(cur->ip >> 8),
1367                cur->ip & 0xff,
1368        (unsigned char)(cur->mask >> 24),
1369        (unsigned char)(cur->mask >> 16),
1370        (unsigned char)(cur->mask >> 8),
1371                cur->mask & 0xff);
1372#endif
1373    if((config->rmt_ip & cur->mask) == cur->ip)
1374        return cur->allow_deny == 'A';   /* Allow/Deny */
1375    }
1376
1377    /* if unconfigured, return 1 - access from all */
1378    return !config->flg_deny_all;
1379}
1380
1381/****************************************************************************
1382 *
1383 > $Function: checkPerm()
1384 *
1385 * $Description: Check the permission file for access password protected.
1386 *
1387 *   If config file isn't present, everything is allowed.
1388 *   Entries are of the form you can see example from header source
1389 *
1390 * $Parameters:
1391 *      (const char *) path  . . . . The file path.
1392 *      (const char *) request . . . User information to validate.
1393 *
1394 * $Return: (int)  . . . . . . . . . 1 if request OK, 0 otherwise.
1395 *
1396 ****************************************************************************/
1397
1398#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1399static int checkPerm(const char *path, const char *request)
1400{
1401    Htaccess * cur;
1402    const char *p;
1403    const char *p0;
1404
1405    const char *prev = NULL;
1406
1407    /* This could stand some work */
1408    for (cur = config->auth; cur; cur = cur->next) {
1409    p0 = cur->before_colon;
1410    if(prev != NULL && strcmp(prev, p0) != 0)
1411        continue;       /* find next identical */
1412    p = cur->after_colon;
1413#if DEBUG
1414    fprintf(stderr,"checkPerm: '%s' ? '%s'\n", p0, request);
1415#endif
1416    {
1417        size_t l = strlen(p0);
1418
1419        if(strncmp(p0, path, l) == 0 &&
1420                (l == 1 || path[l] == '/' || path[l] == 0)) {
1421        char *u;
1422        /* path match found.  Check request */
1423        /* for check next /path:user:password */
1424        prev = p0;
1425        u = strchr(request, ':');
1426        if(u == NULL) {
1427            /* bad request, ':' required */
1428            break;
1429            }
1430
1431#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1432        {
1433            char *cipher;
1434            char *pp;
1435
1436            if(strncmp(p, request, u-request) != 0) {
1437                /* user uncompared */
1438                continue;
1439            }
1440            pp = strchr(p, ':');
1441            if(pp && pp[1] == '$' && pp[2] == '1' &&
1442                         pp[3] == '$' && pp[4]) {
1443                pp++;
1444                cipher = pw_encrypt(u+1, pp);
1445                if (strcmp(cipher, pp) == 0)
1446                    goto set_remoteuser_var;   /* Ok */
1447                /* unauthorized */
1448                continue;
1449            }
1450        }
1451#endif
1452        if (strcmp(p, request) == 0) {
1453#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1454set_remoteuser_var:
1455#endif
1456            config->remoteuser = strdup(request);
1457            if(config->remoteuser)
1458            config->remoteuser[(u - request)] = 0;
1459            return 1;   /* Ok */
1460        }
1461        /* unauthorized */
1462        }
1463    }
1464    }   /* for */
1465
1466    return prev == NULL;
1467}
1468
1469#endif  /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1470
1471/****************************************************************************
1472 *
1473 > $Function: handle_sigalrm()
1474 *
1475 * $Description: Handle timeouts
1476 *
1477 ****************************************************************************/
1478
1479static void
1480handle_sigalrm( int sig )
1481{
1482    sendHeaders(HTTP_REQUEST_TIMEOUT);
1483    config->alarm_signaled = sig;
1484}
1485
1486/****************************************************************************
1487 *
1488 > $Function: handleIncoming()
1489 *
1490 * $Description: Handle an incoming http request.
1491 *
1492 ****************************************************************************/
1493static void handleIncoming(void)
1494{
1495  char *buf = config->buf;
1496  char *url;
1497  char *purl;
1498  int  blank = -1;
1499  char *test;
1500  struct stat sb;
1501  int ip_allowed;
1502#ifdef CONFIG_FEATURE_HTTPD_CGI
1503  const char *prequest = request_GET;
1504  long length=0;
1505  char *cookie = 0;
1506  char *content_type = 0;
1507#endif
1508  fd_set s_fd;
1509  struct timeval tv;
1510  int retval;
1511  struct sigaction sa;
1512
1513#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1514  int credentials = -1;  /* if not requred this is Ok */
1515#endif
1516
1517  sa.sa_handler = handle_sigalrm;
1518  sigemptyset(&sa.sa_mask);
1519  sa.sa_flags = 0; /* no SA_RESTART */
1520  sigaction(SIGALRM, &sa, NULL);
1521
1522  do {
1523    int  count;
1524
1525    (void) alarm( TIMEOUT );
1526    if (getLine() <= 0)
1527    break;  /* closed */
1528
1529    purl = strpbrk(buf, " \t");
1530    if(purl == NULL) {
1531BAD_REQUEST:
1532      sendHeaders(HTTP_BAD_REQUEST);
1533      break;
1534    }
1535    *purl = 0;
1536#ifdef CONFIG_FEATURE_HTTPD_CGI
1537    if(strcasecmp(buf, prequest) != 0) {
1538    prequest = "POST";
1539    if(strcasecmp(buf, prequest) != 0) {
1540        sendHeaders(HTTP_NOT_IMPLEMENTED);
1541        break;
1542    }
1543    }
1544#else
1545    if(strcasecmp(buf, request_GET) != 0) {
1546    sendHeaders(HTTP_NOT_IMPLEMENTED);
1547    break;
1548    }
1549#endif
1550    *purl = ' ';
1551    count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
1552
1553    if (count < 1 || buf[0] != '/') {
1554      /* Garbled request/URL */
1555      goto BAD_REQUEST;
1556    }
1557    url = alloca(strlen(buf) + 12);      /* + sizeof("/index.html\0") */
1558    if(url == NULL) {
1559    sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
1560    break;
1561    }
1562    strcpy(url, buf);
1563    /* extract url args if present */
1564    test = strchr(url, '?');
1565    if (test) {
1566      *test++ = 0;
1567      config->query = test;
1568    }
1569
1570    test = decodeString(url, 0);
1571    if(test == NULL)
1572    goto BAD_REQUEST;
1573    if(test == (buf+1)) {
1574    sendHeaders(HTTP_NOT_FOUND);
1575    break;
1576    }
1577    /* algorithm stolen from libbb bb_simplify_path(),
1578       but don`t strdup and reducing trailing slash and protect out root */
1579    purl = test = url;
1580
1581    do {
1582    if (*purl == '/') {
1583        if (*test == '/') {        /* skip duplicate (or initial) slash */
1584        continue;
1585        } else if (*test == '.') {
1586        if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
1587            continue;
1588        } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
1589            ++test;
1590            if (purl == url) {
1591            /* protect out root */
1592            goto BAD_REQUEST;
1593            }
1594            while (*--purl != '/');    /* omit previous dir */
1595            continue;
1596        }
1597        }
1598    }
1599    *++purl = *test;
1600    } while (*++test);
1601
1602    *++purl = 0;        /* so keep last character */
1603    test = purl;        /* end ptr */
1604
1605    /* If URL is directory, adding '/' */
1606    if(test[-1] != '/') {
1607        if ( is_directory(url + 1, 1, &sb) ) {
1608            config->httpd_found.found_moved_temporarily = url;
1609        }
1610    }
1611#if DEBUG
1612    fprintf(stderr, "url='%s', args=%s\n", url, config->query);
1613#endif
1614
1615    test = url;
1616    ip_allowed = checkPermIP();
1617    while(ip_allowed && (test = strchr( test + 1, '/' )) != NULL) {
1618    /* have path1/path2 */
1619    *test = '\0';
1620    if( is_directory(url + 1, 1, &sb) ) {
1621        /* may be having subdir config */
1622        parse_conf(url + 1, SUBDIR_PARSE);
1623        ip_allowed = checkPermIP();
1624    }
1625    *test = '/';
1626    }
1627    if(blank >= 0) {
1628      // read until blank line for HTTP version specified, else parse immediate
1629      while(1) {
1630    alarm(TIMEOUT);
1631    count = getLine();
1632    if(count <= 0)
1633        break;
1634
1635#if DEBUG
1636    fprintf(stderr, "Header: '%s'\n", buf);
1637#endif
1638
1639#ifdef CONFIG_FEATURE_HTTPD_CGI
1640    /* try and do our best to parse more lines */
1641    if ((strncasecmp(buf, Content_length, 15) == 0)) {
1642      if(prequest != request_GET)
1643          length = strtol(buf + 15, 0, 0); // extra read only for POST
1644    } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
1645          for(test = buf + 7; isspace(*test); test++)
1646              ;
1647          cookie = strdup(test);
1648    } else if ((strncasecmp(buf, "Content-Type:", 13) == 0)) {
1649          for(test = buf + 13; isspace(*test); test++)
1650              ;
1651          content_type = strdup(test);
1652    } else if ((strncasecmp(buf, "Referer:", 8) == 0)) {
1653          for(test = buf + 8; isspace(*test); test++)
1654              ;
1655          config->referer = strdup(test);
1656    }
1657#endif
1658
1659#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1660    if (strncasecmp(buf, "Authorization:", 14) == 0) {
1661      /* We only allow Basic credentials.
1662       * It shows up as "Authorization: Basic <userid:password>" where
1663       * the userid:password is base64 encoded.
1664       */
1665      for(test = buf + 14; isspace(*test); test++)
1666          ;
1667      if (strncasecmp(test, "Basic", 5) != 0)
1668          continue;
1669
1670      test += 5;  /* decodeBase64() skiping space self */
1671      decodeBase64(test);
1672      credentials = checkPerm(url, test);
1673    }
1674#endif          /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
1675
1676      }   /* while extra header reading */
1677    }
1678    (void) alarm( 0 );
1679    if(config->alarm_signaled)
1680    break;
1681
1682    if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
1683        /* protect listing [/path]/httpd_conf or IP deny */
1684#ifdef CONFIG_FEATURE_HTTPD_CGI
1685FORBIDDEN:      /* protect listing /cgi-bin */
1686#endif
1687        sendHeaders(HTTP_FORBIDDEN);
1688        break;
1689    }
1690
1691#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1692    if (credentials <= 0 && checkPerm(url, ":") == 0) {
1693      sendHeaders(HTTP_UNAUTHORIZED);
1694      break;
1695    }
1696#endif
1697
1698    if(config->httpd_found.found_moved_temporarily) {
1699    sendHeaders(HTTP_MOVED_TEMPORARILY);
1700#if DEBUG
1701    /* clear unforked memory flag */
1702    config->httpd_found.found_moved_temporarily = NULL;
1703#endif
1704    break;
1705    }
1706
1707    test = url + 1;      /* skip first '/' */
1708
1709#ifdef CONFIG_FEATURE_HTTPD_CGI
1710    /* if strange Content-Length */
1711    if (length < 0)
1712    break;
1713
1714    if (strncmp(test, "cgi-bin", 7) == 0) {
1715        if(test[7] == '/' && test[8] == 0)
1716            goto FORBIDDEN;     // protect listing cgi-bin/
1717        sendCgi(url, prequest, length, cookie, content_type);
1718    } else {
1719    if (prequest != request_GET)
1720        sendHeaders(HTTP_NOT_IMPLEMENTED);
1721    else {
1722#endif  /* CONFIG_FEATURE_HTTPD_CGI */
1723        if(purl[-1] == '/')
1724            strcpy(purl, "index.html");
1725        if ( stat(test, &sb ) == 0 ) {
1726            config->ContentLength = sb.st_size;
1727            config->last_mod = sb.st_mtime;
1728        }
1729        sendFile(test);
1730#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1731        /* unset if non inetd looped */
1732        config->ContentLength = -1;
1733#endif
1734
1735#ifdef CONFIG_FEATURE_HTTPD_CGI
1736    }
1737    }
1738#endif
1739
1740  } while (0);
1741
1742
1743#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1744/* from inetd don`t looping: freeing, closing automatic from exit always */
1745# if DEBUG
1746  fprintf(stderr, "closing socket\n");
1747# endif
1748# ifdef CONFIG_FEATURE_HTTPD_CGI
1749  free(cookie);
1750  free(content_type);
1751  free(config->referer);
1752#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1753  free(config->remoteuser);
1754#endif
1755# endif
1756#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
1757  shutdown(a_c_w, SHUT_WR);
1758
1759  /* Properly wait for remote to closed */
1760  FD_ZERO (&s_fd) ;
1761  FD_SET (a_c_r, &s_fd) ;
1762
1763  do {
1764    tv.tv_sec = 2 ;
1765    tv.tv_usec = 0 ;
1766    retval = select (a_c_r + 1, &s_fd, NULL, NULL, &tv);
1767  } while (retval > 0 && (read (a_c_r, buf, sizeof (config->buf)) > 0));
1768
1769  shutdown(a_c_r, SHUT_RD);
1770#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1771  close(config->accepted_socket);
1772#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
1773}
1774
1775/****************************************************************************
1776 *
1777 > $Function: miniHttpd()
1778 *
1779 * $Description: The main http server function.
1780 *
1781 *   Given an open socket fildes, listen for new connections and farm out
1782 *   the processing as a forked process.
1783 *
1784 * $Parameters:
1785 *      (int) server. . . The server socket fildes.
1786 *
1787 * $Return: (int) . . . . Always 0.
1788 *
1789 ****************************************************************************/
1790#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1791static int miniHttpd(int server)
1792{
1793  fd_set readfd, portfd;
1794
1795  FD_ZERO(&portfd);
1796  FD_SET(server, &portfd);
1797
1798  /* copy the ports we are watching to the readfd set */
1799  while (1) {
1800    readfd = portfd;
1801
1802    /* Now wait INDEFINITELY on the set of sockets! */
1803    if (select(server + 1, &readfd, 0, 0, 0) > 0) {
1804      if (FD_ISSET(server, &readfd)) {
1805    int on;
1806    struct sockaddr_in fromAddr;
1807
1808    socklen_t fromAddrLen = sizeof(fromAddr);
1809    int s = accept(server,
1810               (struct sockaddr *)&fromAddr, &fromAddrLen);
1811
1812    if (s < 0) {
1813        continue;
1814    }
1815    config->accepted_socket = s;
1816    config->rmt_ip = ntohl(fromAddr.sin_addr.s_addr);
1817#if defined(CONFIG_FEATURE_HTTPD_CGI) || DEBUG
1818    sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1819        (unsigned char)(config->rmt_ip >> 24),
1820        (unsigned char)(config->rmt_ip >> 16),
1821        (unsigned char)(config->rmt_ip >> 8),
1822                config->rmt_ip & 0xff);
1823    config->port = ntohs(fromAddr.sin_port);
1824#if DEBUG
1825    bb_error_msg("connection from IP=%s, port %u\n",
1826                    config->rmt_ip_str, config->port);
1827#endif
1828#endif /* CONFIG_FEATURE_HTTPD_CGI */
1829
1830    /*  set the KEEPALIVE option to cull dead connections */
1831    on = 1;
1832    setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on));
1833
1834#if !DEBUG
1835    if (fork() == 0)
1836#endif
1837    {
1838        /* This is the spawned thread */
1839#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1840        /* protect reload config, may be confuse checking */
1841        signal(SIGHUP, SIG_IGN);
1842#endif
1843        handleIncoming();
1844#if !DEBUG
1845        exit(0);
1846#endif
1847    }
1848    close(s);
1849      }
1850    }
1851  } // while (1)
1852  return 0;
1853}
1854
1855#else
1856    /* from inetd */
1857
1858static int miniHttpd(void)
1859{
1860  struct sockaddr_in fromAddrLen;
1861  socklen_t sinlen = sizeof (struct sockaddr_in);
1862
1863  getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen);
1864  config->rmt_ip = ntohl(fromAddrLen.sin_addr.s_addr);
1865#ifdef CONFIG_FEATURE_HTTPD_CGI
1866  sprintf(config->rmt_ip_str, "%u.%u.%u.%u",
1867        (unsigned char)(config->rmt_ip >> 24),
1868        (unsigned char)(config->rmt_ip >> 16),
1869        (unsigned char)(config->rmt_ip >> 8),
1870                config->rmt_ip & 0xff);
1871#endif
1872  config->port = ntohs(fromAddrLen.sin_port);
1873  handleIncoming();
1874  return 0;
1875}
1876#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
1877
1878#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
1879static void sighup_handler(int sig)
1880{
1881    /* set and reset */
1882    struct sigaction sa;
1883
1884    parse_conf(default_path_httpd_conf,
1885            sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
1886    sa.sa_handler = sighup_handler;
1887    sigemptyset(&sa.sa_mask);
1888    sa.sa_flags = SA_RESTART;
1889    sigaction(SIGHUP, &sa, NULL);
1890}
1891#endif
1892
1893enum httpd_opts_nums {
1894    c_opt_config_file = 0,
1895    d_opt_decode_url,
1896    h_opt_home_httpd,
1897    USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
1898    USE_FEATURE_HTTPD_BASIC_AUTH(r_opt_realm,)
1899    USE_FEATURE_HTTPD_AUTH_MD5(m_opt_md5,)
1900    USE_FEATURE_HTTPD_SETUID(u_opt_setuid,)
1901    USE_FEATURE_HTTPD_WITHOUT_INETD(p_opt_port,)
1902};
1903
1904static const char httpd_opts[]="c:d:h:"
1905    USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
1906    USE_FEATURE_HTTPD_BASIC_AUTH("r:")
1907    USE_FEATURE_HTTPD_AUTH_MD5("m:")
1908    USE_FEATURE_HTTPD_SETUID("u:")
1909    USE_FEATURE_HTTPD_WITHOUT_INETD("p:");
1910
1911#define OPT_CONFIG_FILE (1<<c_opt_config_file)
1912#define OPT_DECODE_URL  (1<<d_opt_decode_url)
1913#define OPT_HOME_HTTPD  (1<<h_opt_home_httpd)
1914
1915#define OPT_ENCODE_URL  USE_FEATURE_HTTPD_ENCODE_URL_STR((1<<e_opt_encode_url)) \
1916            SKIP_FEATURE_HTTPD_ENCODE_URL_STR(0)
1917
1918#define OPT_REALM       USE_FEATURE_HTTPD_BASIC_AUTH((1<<r_opt_realm)) \
1919            SKIP_FEATURE_HTTPD_BASIC_AUTH(0)
1920
1921#define OPT_MD5         USE_FEATURE_HTTPD_AUTH_MD5((1<<m_opt_md5)) \
1922            SKIP_FEATURE_HTTPD_AUTH_MD5(0)
1923
1924#define OPT_SETUID      USE_FEATURE_HTTPD_SETUID((1<<u_opt_setuid)) \
1925            SKIP_FEATURE_HTTPD_SETUID(0)
1926
1927#define OPT_PORT        USE_FEATURE_HTTPD_WITHOUT_INETD((1<<p_opt_port)) \
1928            SKIP_FEATURE_HTTPD_WITHOUT_INETD(0)
1929
1930
1931int httpd_main(int argc, char *argv[])
1932{
1933  unsigned long opt;
1934  const char *home_httpd = home;
1935  char *url_for_decode;
1936  USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
1937  USE_FEATURE_HTTPD_WITHOUT_INETD(const char *s_port;)
1938  USE_FEATURE_HTTPD_WITHOUT_INETD(int server;)
1939
1940  USE_FEATURE_HTTPD_SETUID(const char *s_uid;)
1941  USE_FEATURE_HTTPD_SETUID(long uid = -1;)
1942
1943  USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
1944
1945  config = xcalloc(1, sizeof(*config));
1946#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
1947  config->realm = "Web Server Authentication";
1948#endif
1949
1950#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1951  config->port = 80;
1952#endif
1953
1954  config->ContentLength = -1;
1955
1956  opt = bb_getopt_ulflags(argc, argv, httpd_opts,
1957            &(config->configFile), &url_for_decode, &home_httpd
1958            USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
1959            USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm))
1960            USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
1961            USE_FEATURE_HTTPD_SETUID(, &s_uid)
1962            USE_FEATURE_HTTPD_WITHOUT_INETD(, &s_port)
1963    );
1964
1965  if(opt & OPT_DECODE_URL) {
1966      printf("%s", decodeString(url_for_decode, 1));
1967      return 0;
1968  }
1969#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
1970  if(opt & OPT_ENCODE_URL) {
1971      printf("%s", encodeString(url_for_encode));
1972      return 0;
1973  }
1974#endif
1975#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
1976  if(opt & OPT_MD5) {
1977      printf("%s\n", pw_encrypt(pass, "$1$"));
1978      return 0;
1979  }
1980#endif
1981#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1982    if(opt & OPT_PORT)
1983    config->port = bb_xgetlarg(s_port, 10, 1, 0xffff);
1984#ifdef CONFIG_FEATURE_HTTPD_SETUID
1985    if(opt & OPT_SETUID) {
1986    char *e;
1987
1988    uid = strtol(s_uid, &e, 0);
1989    if(*e != '\0') {
1990        /* not integer */
1991        uid = bb_xgetpwnam(s_uid);
1992    }
1993      }
1994#endif
1995#endif
1996
1997  bb_xchdir(home_httpd);
1998#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
1999  server = openServer();
2000# ifdef CONFIG_FEATURE_HTTPD_SETUID
2001  /* drop privileges */
2002  if(uid > 0)
2003    setuid(uid);
2004# endif
2005#endif
2006
2007#ifdef CONFIG_FEATURE_HTTPD_CGI
2008   {
2009    char *p = getenv("PATH");
2010    if(p) {
2011        p = bb_xstrdup(p);
2012    }
2013    clearenv();
2014    if(p)
2015        setenv("PATH", p, 1);
2016# ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
2017    addEnvPort("SERVER");
2018# endif
2019   }
2020#endif
2021
2022#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
2023  sighup_handler(0);
2024#else
2025  parse_conf(default_path_httpd_conf, FIRST_PARSE);
2026#endif
2027
2028#ifdef CONFIG_FEATURE_HTTPD_WITHOUT_INETD
2029# if !DEBUG
2030  bb_xdaemon(1, 0);     /* don`t change curent directory */
2031# endif
2032  return miniHttpd(server);
2033#else
2034  return miniHttpd();
2035#endif
2036}
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