* httpd implementation for busybox
*
* Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
- * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
+ * Copyright (C) 2003,2004 Vladimir Oleynik <dzo@simtreas.ru>
*
* simplify patch stolen from libbb without using strdup
*
* foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
* bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
* Note that url encoding for arguments is not the same as html encoding for
- * presenation. -d decodes a url-encoded argument while -e encodes in html
+ * presentation. -d decodes a url-encoded argument while -e encodes in html
* for page display.
*
* httpd.conf has the following format:
- *
+ *
* A:172.20. # Allow address from 172.20.0.0/16
* A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
* A:10.0.0.0/255.255.255.128 # Allow any address that previous set
* /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
* /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
* .au:audio/basic # additional mime type for audio.au files
- *
- * A/D may be as a/d or allow/deny - first char case unsensitive
+ *
+ * A/D may be as a/d or allow/deny - first char case insensitive
* Deny IP rules take precedence over allow rules.
- *
- *
+ *
+ *
* The Deny/Allow IP logic:
- *
+ *
* - Default is to allow all. No addresses are denied unless
- * denied with a D: rule.
+ * denied with a D: rule.
* - Order of Deny/Allow rules is significant
* - Deny rules take precedence over allow rules.
* - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
- * addresses.
+ * addresses.
* - Specification of Allow all (A:*) is a no-op
- *
+ *
* Example:
* 1. Allow only specified addresses
* A:172.20 # Allow any address that begins with 172.20.
* A:10.10. # Allow any address that begins with 10.10.
* A:127.0.0.1 # Allow local loopback connections
* D:* # Deny from other IP connections
- *
+ *
* 2. Only deny specified addresses
* D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
* D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
* A:* # (optional line added for clarity)
- *
+ *
* If a sub directory contains a config file it is parsed and merged with
* any existing settings as if it was appended to the original configuration.
*
* subdir http request, any merge is discarded when the process exits. As a
* result, the subdir settings only have a lifetime of a single request.
*
- *
- * If -c is not set, an attempt will be made to open the default
+ *
+ * If -c is not set, an attempt will be made to open the default
* root configuration file. If -c is set and the file is not found, the
* server exits with an error.
- *
+ *
*/
#include "busybox.h"
-static const char httpdVersion[] = "busybox httpd/1.34 2-Oct-2003";
+static const char httpdVersion[] = "busybox httpd/1.35 6-Oct-2004";
static const char default_path_httpd_conf[] = "/etc";
static const char httpd_conf[] = "httpd.conf";
static const char home[] = "./";
# define cont_l_fmt "%ld"
#endif
-// Note: bussybox xfuncs are not used because we want the server to keep running
+#define TIMEOUT 60
+
+// Note: busybox xfuncs are not used because we want the server to keep running
// if something bad happens due to a malformed user request.
// As a result, all memory allocation after daemonize
// is checked rigorously
char *remoteuser;
#endif
+ const char *query;
+
#ifdef CONFIG_FEATURE_HTTPD_CGI
char *referer;
#endif
#endif
unsigned port; /* server initial port and for
set env REMOTE_PORT */
+ union HTTPD_FOUND {
+ const char *found_mime_type;
+ const char *found_moved_temporarily;
+ } httpd_found;
- const char *found_mime_type;
off_t ContentLength; /* -1 - unknown */
time_t last_mod;
#define a_c_r 0
#define a_c_w 1
#endif
+ volatile int alarm_signaled;
+
} HttpdConfig;
static HttpdConfig *config;
static const char request_GET[] = "GET"; /* size algorithic optimize */
static const char* const suffixTable [] = {
-/* Warning: shorted equalent suffix in one line must be first */
+/* Warning: shorted equivalent suffix in one line must be first */
".htm.html", "text/html",
".jpg.jpeg", "image/jpeg",
".gif", "image/gif",
typedef enum
{
HTTP_OK = 200,
+ HTTP_MOVED_TEMPORARILY = 302,
+ HTTP_BAD_REQUEST = 400, /* malformed syntax */
HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
HTTP_NOT_FOUND = 404,
- HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
- HTTP_BAD_REQUEST = 400, /* malformed syntax */
HTTP_FORBIDDEN = 403,
+ HTTP_REQUEST_TIMEOUT = 408,
+ HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
HTTP_INTERNAL_SERVER_ERROR = 500,
#if 0 /* future use */
HTTP_CONTINUE = 100,
HTTP_NO_CONTENT = 204,
HTTP_MULTIPLE_CHOICES = 300,
HTTP_MOVED_PERMANENTLY = 301,
- HTTP_MOVED_TEMPORARILY = 302,
HTTP_NOT_MODIFIED = 304,
HTTP_PAYMENT_REQUIRED = 402,
HTTP_BAD_GATEWAY = 502,
static const HttpEnumString httpResponseNames[] = {
{ HTTP_OK, "OK" },
+ { HTTP_MOVED_TEMPORARILY, "Found", "Directories must end with a slash." },
+ { HTTP_REQUEST_TIMEOUT, "Request Timeout",
+ "No request appeared within a reasonable time period." },
{ HTTP_NOT_IMPLEMENTED, "Not Implemented",
"The requested method is not recognized by this server." },
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
{ HTTP_NO_CONTENT, "No Content" },
{ HTTP_MULTIPLE_CHOICES, "Multiple Choices" },
{ HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
- { HTTP_MOVED_TEMPORARILY, "Moved Temporarily" },
{ HTTP_NOT_MODIFIED, "Not Modified" },
{ HTTP_BAD_GATEWAY, "Bad Gateway", "" },
{ HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
> $Function: parse_conf()
*
* $Description: parse configuration file into in-memory linked list.
- *
+ *
* The first non-white character is examined to determine if the config line
* is one of the following:
* .ext:mime/type # new mime type not compiled into httpd
* checks.
* (int) flag . . . . . . the source of the parse request.
*
- * $Return: (None)
+ * $Return: (None)
*
****************************************************************************/
static void parse_conf(const char *path, int flag)
*
> $Function: addEnv()
*
- * $Description: Add an enviornment variable setting to the global list.
+ * $Description: Add an environment variable setting to the global list.
* A NAME=VALUE string is allocated, filled, and added to the list of
* environment settings passed to the cgi execution script.
*
char *buf = config->buf;
const char *responseString = "";
const char *infoString = 0;
+ const char *mime_type;
unsigned int i;
time_t timer = time(0);
char timeStr[80];
break;
}
}
- if (responseNum != HTTP_OK) {
- config->found_mime_type = "text/html"; // error message is HTML
- }
+ /* error message is HTML */
+ mime_type = responseNum == HTTP_OK ?
+ config->httpd_found.found_mime_type : "text/html";
/* emit the current date */
strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
len = sprintf(buf,
"HTTP/1.0 %d %s\nContent-type: %s\r\n"
"Date: %s\r\nConnection: close\r\n",
- responseNum, responseString, config->found_mime_type, timeStr);
+ responseNum, responseString, mime_type, timeStr);
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
if (responseNum == HTTP_UNAUTHORIZED) {
config->realm);
}
#endif
+ if(responseNum == HTTP_MOVED_TEMPORARILY) {
+ len += sprintf(buf+len, "Location: %s/%s%s\r\n",
+ config->httpd_found.found_moved_temporarily,
+ (config->query ? "?" : ""),
+ (config->query ? config->query : ""));
+ }
+
if (config->ContentLength != -1) { /* file */
strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
len += sprintf(buf+len, "Last-Modified: %s\r\n%s " cont_l_fmt "\r\n",
*
* $Parameters:
* (const char *) url . . . . . . The requested URL (with leading /).
- * (const char *urlArgs). . . . . Any URL arguments.
* (int bodyLen) . . . . . . . . Length of the post body.
* (const char *cookie) . . . . . For set HTTP_COOKIE.
* (const char *content_type) . . For set CONTENT_TYPE.
*
****************************************************************************/
static int sendCgi(const char *url,
- const char *request, const char *urlArgs,
- int bodyLen, const char *cookie,
+ const char *request, int bodyLen, const char *cookie,
const char *content_type)
{
int fromCgi[2]; /* pipe for reading data from CGI */
addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */
addEnv("PATH", "", getenv("PATH"));
addEnv("REQUEST", "METHOD", request);
- if(urlArgs) {
- char *uri = alloca(strlen(purl) + 2 + strlen(urlArgs));
+ if(config->query) {
+ char *uri = alloca(strlen(purl) + 2 + strlen(config->query));
if(uri)
- sprintf(uri, "%s?%s", purl, urlArgs);
+ sprintf(uri, "%s?%s", purl, config->query);
addEnv("REQUEST", "URI", uri);
} else {
addEnv("REQUEST", "URI", purl);
*script = '\0'; /* reduce /PATH_INFO */
/* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
addEnv("SCRIPT_NAME", "", purl);
- addEnv("QUERY_STRING", "", urlArgs);
+ addEnv("QUERY_STRING", "", config->query);
addEnv("SERVER", "SOFTWARE", httpdVersion);
addEnv("SERVER", "PROTOCOL", "HTTP/1.0");
addEnv("GATEWAY_INTERFACE", "", "CGI/1.1");
addEnv("HTTP", "COOKIE", cookie);
if(content_type)
addEnv("CONTENT", "TYPE", content_type);
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
if(config->remoteuser) {
addEnv("REMOTE", "USER", config->remoteuser);
addEnv("AUTH_TYPE", "", "Basic");
}
+#endif
if(config->referer)
addEnv("HTTP", "REFERER", config->referer);
}
} else if(bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
count = bodyLen > sizeof(wbuf) ? sizeof(wbuf) : bodyLen;
- count = bb_full_read(a_c_r, wbuf, count);
+ count = safe_read(a_c_r, wbuf, count);
if(count > 0) {
post_readed_size += count;
bodyLen -= count;
} else {
bodyLen = 0; /* closed */
}
- } else if(FD_ISSET(inFd, &readSet)) {
+ }
+ if(FD_ISSET(inFd, &readSet)) {
int s = a_c_w;
char *rbuf = config->buf;
+#ifndef PIPE_BUF
+# define PIPESIZE 4096 /* amount of buffering in a pipe */
+#else
+# define PIPESIZE PIPE_BUF
+#endif
+#if PIPESIZE >= MAX_MEMORY_BUFF
+# error "PIPESIZE >= MAX_MEMORY_BUFF"
+#endif
+
// There is something to read
- count = bb_full_read(inFd, rbuf, MAX_MEMORY_BUFF-1);
+ count = safe_read(inFd, rbuf, PIPESIZE);
if (count == 0)
break; /* closed */
if (count > 0) {
}
firstLine = 0;
}
- bb_full_write(s, rbuf, count);
+ if (bb_full_write(s, rbuf, count) != count)
+ break;
+
#ifdef DEBUG
if (config->debugHttpd)
fprintf(stderr, "cgi read %d bytes\n", count);
break;
}
/* also, if not found, set default as "application/octet-stream"; */
- config->found_mime_type = *(table+1);
+ config->httpd_found.found_mime_type = *(table+1);
#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
if (suffix) {
Htaccess * cur;
for (cur = config->mime_a; cur; cur = cur->next) {
if(strcmp(cur->before_colon, suffix) == 0) {
- config->found_mime_type = cur->after_colon;
+ config->httpd_found.found_mime_type = cur->after_colon;
break;
}
}
#ifdef DEBUG
if (config->debugHttpd)
fprintf(stderr, "Sending file '%s' Content-type: %s\n",
- url, config->found_mime_type);
+ url, config->httpd_found.found_mime_type);
#endif
f = open(url, O_RDONLY);
sendHeaders(HTTP_OK);
while ((count = bb_full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
- bb_full_write(a_c_w, buf, count);
+ if (bb_full_write(a_c_w, buf, count) != count)
+ break;
}
close(f);
} else {
return cur->allow_deny == 'A'; /* Allow/Deny */
}
- /* if uncofigured, return 1 - access from all */
+ /* if unconfigured, return 1 - access from all */
return !config->flg_deny_all;
}
}
#endif
if (strcmp(p, request) == 0) {
+#ifdef CONFIG_FEATURE_HTTPD_AUTH_MD5
set_remoteuser_var:
+#endif
config->remoteuser = strdup(request);
if(config->remoteuser)
config->remoteuser[(u - request)] = 0;
#endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
+/****************************************************************************
+ *
+ > $Function: handleIncoming()
+ *
+ * $Description: Handle an incoming http request.
+ *
+ ****************************************************************************/
+
+static void
+handle_sigalrm( int sig )
+{
+ sendHeaders(HTTP_REQUEST_TIMEOUT);
+ config->alarm_signaled = sig;
+}
/****************************************************************************
*
char *url;
char *purl;
int blank = -1;
- char *urlArgs;
+ char *test;
+ struct stat sb;
+ int ip_allowed;
#ifdef CONFIG_FEATURE_HTTPD_CGI
const char *prequest = request_GET;
long length=0;
char *cookie = 0;
char *content_type = 0;
#endif
- char *test;
- struct stat sb;
- int ip_allowed;
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ fd_set s_fd;
+ struct timeval tv;
+ int retval;
+#endif
+ struct sigaction sa;
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
int credentials = -1; /* if not requred this is Ok */
#endif
+ sa.sa_handler = handle_sigalrm;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0; /* no SA_RESTART */
+ sigaction(SIGALRM, &sa, NULL);
+
do {
int count;
+ (void) alarm( TIMEOUT );
if (getLine() <= 0)
break; /* closed */
}
strcpy(url, buf);
/* extract url args if present */
- urlArgs = strchr(url, '?');
- if (urlArgs)
- *urlArgs++ = 0;
+ test = strchr(url, '?');
+ if (test) {
+ *test++ = 0;
+ config->query = test;
+ }
/* algorithm stolen from libbb bb_simplify_path(),
but don`t strdup and reducing trailing slash and protect out root */
*++purl = 0; /* so keep last character */
test = purl; /* end ptr */
+ /* If URL is directory, adding '/' */
/* If URL is directory, adding '/' */
if(test[-1] != '/') {
if ( is_directory(url + 1, 1, &sb) ) {
- *test++ = '/';
- *test = 0;
- purl = test; /* end ptr */
+ config->httpd_found.found_moved_temporarily = url;
}
}
#ifdef DEBUG
if (config->debugHttpd)
- fprintf(stderr, "url='%s', args=%s\n", url, urlArgs);
+ fprintf(stderr, "url='%s', args=%s\n", url, config->query);
#endif
test = url;
}
// read until blank line for HTTP version specified, else parse immediate
- while (blank >= 0 && (count = getLine()) > 0) {
+ while (blank >= 0 && alarm(TIMEOUT) >= 0 && (count = getLine()) > 0) {
#ifdef DEBUG
if (config->debugHttpd) fprintf(stderr, "Header: '%s'\n", buf);
} /* while extra header reading */
+ (void) alarm( 0 );
+ if(config->alarm_signaled)
+ break;
if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 || ip_allowed == 0) {
/* protect listing [/path]/httpd_conf or IP deny */
}
#endif
+ if(config->httpd_found.found_moved_temporarily) {
+ sendHeaders(HTTP_MOVED_TEMPORARILY);
+#ifdef DEBUG
+ /* clear unforked memory flag */
+ if(config->debugHttpd)
+ config->httpd_found.found_moved_temporarily = NULL;
+#endif
+ break;
+ }
+
test = url + 1; /* skip first '/' */
#ifdef CONFIG_FEATURE_HTTPD_CGI
if (strncmp(test, "cgi-bin", 7) == 0) {
if(test[7] == '/' && test[8] == 0)
goto FORBIDDEN; // protect listing cgi-bin/
- sendCgi(url, prequest, urlArgs, length, cookie, content_type);
+ sendCgi(url, prequest, length, cookie, content_type);
} else {
if (prequest != request_GET)
sendHeaders(HTTP_NOT_IMPLEMENTED);
# ifdef CONFIG_FEATURE_HTTPD_CGI
free(cookie);
free(content_type);
- free(config->remoteuser);
free(config->referer);
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ free(config->remoteuser);
+#endif
# endif
shutdown(a_c_w, SHUT_WR);
+
+ /* Properly wait for remote to closed */
+ FD_ZERO (&s_fd) ;
+ FD_SET (a_c_w, &s_fd) ;
+
+ do {
+ tv.tv_sec = 2 ;
+ tv.tv_usec = 0 ;
+ retval = select (a_c_w + 1, &s_fd, NULL, NULL, &tv);
+ } while (retval > 0 && (read (a_c_w, buf, sizeof (config->buf)) > 0));
+
shutdown(a_c_r, SHUT_RD);
close(config->accepted_socket);
#endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
while (1) {
readfd = portfd;
- /* Now wait INDEFINATELY on the set of sockets! */
+ /* Now wait INDEFINITELY on the set of sockets! */
if (select(server + 1, &readfd, 0, 0, 0) > 0) {
if (FD_ISSET(server, &readfd)) {
int on;
#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
server = openServer();
# ifdef CONFIG_FEATURE_HTTPD_SETUID
- /* drop privilegies */
+ /* drop privileges */
if(uid > 0)
setuid(uid);
# endif
projects / oweals / busybox.git / blobdiff