mirror of
https://github.com/topjohnwu/ndk-busybox.git
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2247 lines
60 KiB
C
2247 lines
60 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* httpd implementation for busybox
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*
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* Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
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* Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
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*
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* simplify patch stolen from libbb without using strdup
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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*****************************************************************************
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*
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* Typical usage:
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* for non root user
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* httpd -p 8080 -h $HOME/public_html
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* or for daemon start from rc script with uid=0:
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* httpd -u www
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* This is equivalent if www user have uid=80 to
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* httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
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*
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*
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* When a url starts by "/cgi-bin/" it is assumed to be a cgi script. The
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* server changes directory to the location of the script and executes it
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* after setting QUERY_STRING and other environment variables.
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*
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* Doc:
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* "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
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*
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* The server can also be invoked as a url arg decoder and html text encoder
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* as follows:
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* foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
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* bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
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* Note that url encoding for arguments is not the same as html encoding for
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* presentation. -d decodes a url-encoded argument while -e encodes in html
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* for page display.
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*
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* httpd.conf has the following format:
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*
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* A:172.20. # Allow address from 172.20.0.0/16
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* A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
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* A:10.0.0.0/255.255.255.128 # Allow any address that previous set
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* A:127.0.0.1 # Allow local loopback connections
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* D:* # Deny from other IP connections
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* E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
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* /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
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* /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
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* /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
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* .au:audio/basic # additional mime type for audio.au files
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* *.php:/path/php # running cgi.php scripts through an interpreter
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*
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* A/D may be as a/d or allow/deny - first char case insensitive
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* Deny IP rules take precedence over allow rules.
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*
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*
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* The Deny/Allow IP logic:
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*
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* - Default is to allow all. No addresses are denied unless
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* denied with a D: rule.
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* - Order of Deny/Allow rules is significant
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* - Deny rules take precedence over allow rules.
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* - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
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* addresses.
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* - Specification of Allow all (A:*) is a no-op
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*
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* Example:
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* 1. Allow only specified addresses
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* A:172.20 # Allow any address that begins with 172.20.
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* A:10.10. # Allow any address that begins with 10.10.
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* A:127.0.0.1 # Allow local loopback connections
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* D:* # Deny from other IP connections
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*
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* 2. Only deny specified addresses
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* D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
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* D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
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* A:* # (optional line added for clarity)
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*
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* If a sub directory contains a config file it is parsed and merged with
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* any existing settings as if it was appended to the original configuration.
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*
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* subdir paths are relative to the containing subdir and thus cannot
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* affect the parent rules.
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*
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* Note that since the sub dir is parsed in the forked thread servicing the
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* subdir http request, any merge is discarded when the process exits. As a
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* result, the subdir settings only have a lifetime of a single request.
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*
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* Custom error pages can contain an absolute path or be relative to
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* 'home_httpd'. Error pages are to be static files (no CGI or script). Error
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* page can only be defined in the root configuration file and are not taken
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* into account in local (directories) config files.
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*
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* If -c is not set, an attempt will be made to open the default
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* root configuration file. If -c is set and the file is not found, the
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* server exits with an error.
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*
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*/
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#include "libbb.h"
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#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
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#include <sys/sendfile.h>
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#endif
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//#define DEBUG 1
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#define DEBUG 0
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#define IOBUF_SIZE 8192 /* IO buffer */
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/* amount of buffering in a pipe */
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#ifndef PIPE_BUF
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# define PIPE_BUF 4096
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#endif
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#if PIPE_BUF >= IOBUF_SIZE
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# error "PIPE_BUF >= IOBUF_SIZE"
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#endif
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#define HEADER_READ_TIMEOUT 60
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static const char default_path_httpd_conf[] ALIGN1 = "/etc";
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static const char httpd_conf[] ALIGN1 = "httpd.conf";
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static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
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typedef struct has_next_ptr {
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struct has_next_ptr *next;
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} has_next_ptr;
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/* Must have "next" as a first member */
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typedef struct Htaccess {
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struct Htaccess *next;
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char *after_colon;
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char before_colon[1]; /* really bigger, must be last */
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} Htaccess;
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/* Must have "next" as a first member */
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typedef struct Htaccess_IP {
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struct Htaccess_IP *next;
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unsigned ip;
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unsigned mask;
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int allow_deny;
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} Htaccess_IP;
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enum {
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HTTP_OK = 200,
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HTTP_PARTIAL_CONTENT = 206,
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HTTP_MOVED_TEMPORARILY = 302,
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HTTP_BAD_REQUEST = 400, /* malformed syntax */
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HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
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HTTP_NOT_FOUND = 404,
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HTTP_FORBIDDEN = 403,
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HTTP_REQUEST_TIMEOUT = 408,
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HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
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HTTP_INTERNAL_SERVER_ERROR = 500,
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HTTP_CONTINUE = 100,
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#if 0 /* future use */
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HTTP_SWITCHING_PROTOCOLS = 101,
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HTTP_CREATED = 201,
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HTTP_ACCEPTED = 202,
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HTTP_NON_AUTHORITATIVE_INFO = 203,
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HTTP_NO_CONTENT = 204,
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HTTP_MULTIPLE_CHOICES = 300,
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HTTP_MOVED_PERMANENTLY = 301,
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HTTP_NOT_MODIFIED = 304,
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HTTP_PAYMENT_REQUIRED = 402,
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HTTP_BAD_GATEWAY = 502,
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HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
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HTTP_RESPONSE_SETSIZE = 0xffffffff
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#endif
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};
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static const uint16_t http_response_type[] ALIGN2 = {
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HTTP_OK,
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#if ENABLE_FEATURE_HTTPD_RANGES
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HTTP_PARTIAL_CONTENT,
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#endif
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HTTP_MOVED_TEMPORARILY,
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HTTP_REQUEST_TIMEOUT,
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HTTP_NOT_IMPLEMENTED,
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#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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HTTP_UNAUTHORIZED,
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#endif
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HTTP_NOT_FOUND,
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HTTP_BAD_REQUEST,
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HTTP_FORBIDDEN,
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HTTP_INTERNAL_SERVER_ERROR,
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#if 0 /* not implemented */
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HTTP_CREATED,
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HTTP_ACCEPTED,
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HTTP_NO_CONTENT,
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HTTP_MULTIPLE_CHOICES,
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HTTP_MOVED_PERMANENTLY,
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HTTP_NOT_MODIFIED,
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HTTP_BAD_GATEWAY,
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HTTP_SERVICE_UNAVAILABLE,
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#endif
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};
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static const struct {
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const char *name;
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const char *info;
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} http_response[ARRAY_SIZE(http_response_type)] = {
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{ "OK", NULL },
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#if ENABLE_FEATURE_HTTPD_RANGES
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{ "Partial Content", NULL },
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#endif
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{ "Found", NULL },
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{ "Request Timeout", "No request appeared within 60 seconds" },
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{ "Not Implemented", "The requested method is not recognized" },
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#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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{ "Unauthorized", "" },
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#endif
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{ "Not Found", "The requested URL was not found" },
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{ "Bad Request", "Unsupported method" },
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{ "Forbidden", "" },
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{ "Internal Server Error", "Internal Server Error" },
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#if 0 /* not implemented */
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{ "Created" },
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{ "Accepted" },
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{ "No Content" },
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{ "Multiple Choices" },
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{ "Moved Permanently" },
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{ "Not Modified" },
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{ "Bad Gateway", "" },
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{ "Service Unavailable", "" },
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#endif
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};
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struct globals {
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int verbose; /* must be int (used by getopt32) */
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smallint flg_deny_all;
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unsigned rmt_ip; /* used for IP-based allow/deny rules */
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time_t last_mod;
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char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
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const char *bind_addr_or_port;
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const char *g_query;
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const char *configFile;
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const char *home_httpd;
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const char *found_mime_type;
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const char *found_moved_temporarily;
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Htaccess_IP *ip_a_d; /* config allow/deny lines */
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USE_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
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USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
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USE_FEATURE_HTTPD_CGI(char *referer;)
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USE_FEATURE_HTTPD_CGI(char *user_agent;)
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off_t file_size; /* -1 - unknown */
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#if ENABLE_FEATURE_HTTPD_RANGES
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off_t range_start;
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off_t range_end;
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off_t range_len;
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#endif
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#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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Htaccess *g_auth; /* config user:password lines */
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#endif
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#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
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Htaccess *mime_a; /* config mime types */
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#endif
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#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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Htaccess *script_i; /* config script interpreters */
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#endif
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char *iobuf; /* [IOBUF_SIZE] */
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#define hdr_buf bb_common_bufsiz1
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char *hdr_ptr;
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int hdr_cnt;
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#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
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const char *http_error_page[ARRAY_SIZE(http_response_type)];
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#endif
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};
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#define G (*ptr_to_globals)
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#define verbose (G.verbose )
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#define flg_deny_all (G.flg_deny_all )
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#define rmt_ip (G.rmt_ip )
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#define bind_addr_or_port (G.bind_addr_or_port)
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#define g_query (G.g_query )
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#define configFile (G.configFile )
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#define home_httpd (G.home_httpd )
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#define found_mime_type (G.found_mime_type )
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#define found_moved_temporarily (G.found_moved_temporarily)
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#define last_mod (G.last_mod )
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#define ip_a_d (G.ip_a_d )
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#define g_realm (G.g_realm )
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#define remoteuser (G.remoteuser )
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#define referer (G.referer )
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#define user_agent (G.user_agent )
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#define file_size (G.file_size )
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#if ENABLE_FEATURE_HTTPD_RANGES
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#define range_start (G.range_start )
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#define range_end (G.range_end )
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#define range_len (G.range_len )
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#endif
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#define rmt_ip_str (G.rmt_ip_str )
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#define g_auth (G.g_auth )
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#define mime_a (G.mime_a )
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#define script_i (G.script_i )
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#define iobuf (G.iobuf )
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#define hdr_ptr (G.hdr_ptr )
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#define hdr_cnt (G.hdr_cnt )
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#define http_error_page (G.http_error_page )
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#define INIT_G() do { \
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PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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USE_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
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bind_addr_or_port = "80"; \
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file_size = -1; \
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} while (0)
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#if !ENABLE_FEATURE_HTTPD_RANGES
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enum {
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range_start = 0,
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range_end = MAXINT(off_t) - 1,
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range_len = MAXINT(off_t),
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};
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#endif
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#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
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/* Prototypes */
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static void send_file_and_exit(const char *url, int headers) ATTRIBUTE_NORETURN;
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static void free_llist(has_next_ptr **pptr)
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{
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has_next_ptr *cur = *pptr;
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while (cur) {
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has_next_ptr *t = cur;
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cur = cur->next;
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free(t);
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}
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*pptr = NULL;
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}
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#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
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|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
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|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
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{
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free_llist((has_next_ptr**)pptr);
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}
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#endif
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static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
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{
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free_llist((has_next_ptr**)pptr);
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}
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/* Returns presumed mask width in bits or < 0 on error.
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* Updates strp, stores IP at provided pointer */
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static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
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{
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const char *p = *strp;
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int auto_mask = 8;
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unsigned ip = 0;
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int j;
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if (*p == '/')
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return -auto_mask;
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for (j = 0; j < 4; j++) {
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unsigned octet;
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if ((*p < '0' || *p > '9') && *p != '/' && *p)
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return -auto_mask;
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octet = 0;
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while (*p >= '0' && *p <= '9') {
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octet *= 10;
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octet += *p - '0';
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if (octet > 255)
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return -auto_mask;
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p++;
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}
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if (*p == '.')
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p++;
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if (*p != '/' && *p)
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auto_mask += 8;
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ip = (ip << 8) | octet;
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}
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if (*p) {
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if (*p != endc)
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return -auto_mask;
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p++;
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if (*p == '\0')
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return -auto_mask;
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}
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*ipp = ip;
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*strp = p;
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return auto_mask;
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}
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/* Returns 0 on success. Stores IP and mask at provided pointers */
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static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
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{
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int i;
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unsigned mask;
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char *p;
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i = scan_ip(&str, ipp, '/');
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if (i < 0)
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return i;
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if (*str) {
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/* there is /xxx after dotted-IP address */
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i = bb_strtou(str, &p, 10);
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if (*p == '.') {
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/* 'xxx' itself is dotted-IP mask, parse it */
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/* (return 0 (success) only if it has N.N.N.N form) */
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return scan_ip(&str, maskp, '\0') - 32;
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}
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if (*p)
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return -1;
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}
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if (i > 32)
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return -1;
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if (sizeof(unsigned) == 4 && i == 32) {
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/* mask >>= 32 below may not work */
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mask = 0;
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} else {
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mask = 0xffffffff;
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mask >>= i;
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}
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/* i == 0 -> *maskp = 0x00000000
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* i == 1 -> *maskp = 0x80000000
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* i == 4 -> *maskp = 0xf0000000
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* i == 31 -> *maskp = 0xfffffffe
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* i == 32 -> *maskp = 0xffffffff */
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*maskp = (uint32_t)(~mask);
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return 0;
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}
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/*
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* Parse configuration file into in-memory linked list.
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*
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* The first non-white character is examined to determine if the config line
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* is one of the following:
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* .ext:mime/type # new mime type not compiled into httpd
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* [adAD]:from # ip address allow/deny, * for wildcard
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* /path:user:pass # username/password
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* Ennn:error.html # error page for status nnn
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*
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* Any previous IP rules are discarded.
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* If the flag argument is not SUBDIR_PARSE then all /path and mime rules
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* are also discarded. That is, previous settings are retained if flag is
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* SUBDIR_PARSE.
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* Error pages are only parsed on the main config file.
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*
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* path Path where to look for httpd.conf (without filename).
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* flag Type of the parse request.
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*/
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/* flag */
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#define FIRST_PARSE 0
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#define SUBDIR_PARSE 1
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#define SIGNALED_PARSE 2
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#define FIND_FROM_HTTPD_ROOT 3
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static void parse_conf(const char *path, int flag)
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{
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FILE *f;
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#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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Htaccess *prev;
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#endif
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#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
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|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
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|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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Htaccess *cur;
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#endif
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const char *cf = configFile;
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char buf[160];
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char *p0 = NULL;
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char *c, *p;
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Htaccess_IP *pip;
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/* discard old rules */
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free_Htaccess_IP_list(&ip_a_d);
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flg_deny_all = 0;
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
|
|
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
|
|
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
/* retain previous auth and mime config only for subdir parse */
|
|
if (flag != SUBDIR_PARSE) {
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
free_Htaccess_list(&g_auth);
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
|
free_Htaccess_list(&mime_a);
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
free_Htaccess_list(&script_i);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
if (flag == SUBDIR_PARSE || cf == NULL) {
|
|
cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
|
|
sprintf((char *)cf, "%s/%s", path, httpd_conf);
|
|
}
|
|
|
|
while ((f = fopen(cf, "r")) == NULL) {
|
|
if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
|
|
/* config file not found, no changes to config */
|
|
return;
|
|
}
|
|
if (configFile && flag == FIRST_PARSE) /* if -c option given */
|
|
bb_simple_perror_msg_and_die(cf);
|
|
flag = FIND_FROM_HTTPD_ROOT;
|
|
cf = httpd_conf;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
prev = g_auth;
|
|
#endif
|
|
/* This could stand some work */
|
|
while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
|
|
c = NULL;
|
|
for (p = p0; *p0 != '\0' && *p0 != '#'; p0++) {
|
|
if (!isspace(*p0)) {
|
|
*p++ = *p0;
|
|
if (*p0 == ':' && c == NULL)
|
|
c = p;
|
|
}
|
|
}
|
|
*p = '\0';
|
|
|
|
/* test for empty or strange line */
|
|
if (c == NULL || *c == '\0')
|
|
continue;
|
|
p0 = buf;
|
|
if (*p0 == 'd')
|
|
*p0 = 'D';
|
|
if (*c == '*') {
|
|
if (*p0 == 'D') {
|
|
/* memorize deny all */
|
|
flg_deny_all = 1;
|
|
}
|
|
/* skip default other "word:*" config lines */
|
|
continue;
|
|
}
|
|
|
|
if (*p0 == 'a')
|
|
*p0 = 'A';
|
|
if (*p0 == 'A' || *p0 == 'D') {
|
|
/* storing current config IP line */
|
|
pip = xzalloc(sizeof(Htaccess_IP));
|
|
if (pip) {
|
|
if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) {
|
|
/* syntax IP{/mask} error detected, protect all */
|
|
*p0 = 'D';
|
|
pip->mask = 0;
|
|
}
|
|
pip->allow_deny = *p0;
|
|
if (*p0 == 'D') {
|
|
/* Deny:from_IP move top */
|
|
pip->next = ip_a_d;
|
|
ip_a_d = pip;
|
|
} else {
|
|
/* add to bottom A:form_IP config line */
|
|
Htaccess_IP *prev_IP = ip_a_d;
|
|
|
|
if (prev_IP == NULL) {
|
|
ip_a_d = pip;
|
|
} else {
|
|
while (prev_IP->next)
|
|
prev_IP = prev_IP->next;
|
|
prev_IP->next = pip;
|
|
}
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
|
if (flag == FIRST_PARSE && *p0 == 'E') {
|
|
int i;
|
|
/* error status code */
|
|
int status = atoi(++p0);
|
|
/* c already points at the character following ':' in parse loop */
|
|
/* c = strchr(p0, ':'); c++; */
|
|
if (status < HTTP_CONTINUE) {
|
|
bb_error_msg("config error '%s' in '%s'", buf, cf);
|
|
continue;
|
|
}
|
|
|
|
/* then error page; find matching status */
|
|
for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
|
if (http_response_type[i] == status) {
|
|
http_error_page[i] = concat_path_file((*c == '/') ? NULL : home_httpd, c);
|
|
break;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
if (*p0 == '/') {
|
|
/* make full path from httpd root / current_path / config_line_path */
|
|
cf = (flag == SUBDIR_PARSE ? path : "");
|
|
p0 = xmalloc(strlen(cf) + (c - buf) + 2 + strlen(c));
|
|
c[-1] = '\0';
|
|
sprintf(p0, "/%s%s", cf, buf);
|
|
|
|
/* another call bb_simplify_path */
|
|
cf = p = p0;
|
|
|
|
do {
|
|
if (*p == '/') {
|
|
if (*cf == '/') { /* skip duplicate (or initial) slash */
|
|
continue;
|
|
}
|
|
if (*cf == '.') {
|
|
if (cf[1] == '/' || cf[1] == '\0') { /* remove extra '.' */
|
|
continue;
|
|
}
|
|
if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == '\0')) {
|
|
++cf;
|
|
if (p > p0) {
|
|
while (*--p != '/') /* omit previous dir */;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
*++p = *cf;
|
|
} while (*++cf);
|
|
|
|
if ((p == p0) || (*p != '/')) { /* not a trailing slash */
|
|
++p; /* so keep last character */
|
|
}
|
|
*p = ':';
|
|
strcpy(p + 1, c);
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
|
|
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
|
|
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
/* storing current config line */
|
|
cur = xzalloc(sizeof(Htaccess) + strlen(p0));
|
|
if (cur) {
|
|
cf = strcpy(cur->before_colon, p0);
|
|
c = strchr(cf, ':');
|
|
*c++ = 0;
|
|
cur->after_colon = c;
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
|
if (*cf == '.') {
|
|
/* config .mime line move top for overwrite previous */
|
|
cur->next = mime_a;
|
|
mime_a = cur;
|
|
continue;
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
if (*cf == '*' && cf[1] == '.') {
|
|
/* config script interpreter line move top for overwrite previous */
|
|
cur->next = script_i;
|
|
script_i = cur;
|
|
continue;
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
free(p0);
|
|
if (prev == NULL) {
|
|
/* first line */
|
|
g_auth = prev = cur;
|
|
} else {
|
|
/* sort path, if current lenght eq or bigger then move up */
|
|
Htaccess *prev_hti = g_auth;
|
|
size_t l = strlen(cf);
|
|
Htaccess *hti;
|
|
|
|
for (hti = prev_hti; hti; hti = hti->next) {
|
|
if (l >= strlen(hti->before_colon)) {
|
|
/* insert before hti */
|
|
cur->next = hti;
|
|
if (prev_hti != hti) {
|
|
prev_hti->next = cur;
|
|
} else {
|
|
/* insert as top */
|
|
g_auth = cur;
|
|
}
|
|
break;
|
|
}
|
|
if (prev_hti != hti)
|
|
prev_hti = prev_hti->next;
|
|
}
|
|
if (!hti) { /* not inserted, add to bottom */
|
|
prev->next = cur;
|
|
prev = cur;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
fclose(f);
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
|
/*
|
|
* Given a string, html-encode special characters.
|
|
* This is used for the -e command line option to provide an easy way
|
|
* for scripts to encode result data without confusing browsers. The
|
|
* returned string pointer is memory allocated by malloc().
|
|
*
|
|
* Returns a pointer to the encoded string (malloced).
|
|
*/
|
|
static char *encodeString(const char *string)
|
|
{
|
|
/* take the simple route and encode everything */
|
|
/* could possibly scan once to get length. */
|
|
int len = strlen(string);
|
|
char *out = xmalloc(len * 6 + 1);
|
|
char *p = out;
|
|
char ch;
|
|
|
|
while ((ch = *string++)) {
|
|
/* very simple check for what to encode */
|
|
if (isalnum(ch))
|
|
*p++ = ch;
|
|
else
|
|
p += sprintf(p, "&#%d;", (unsigned char) ch);
|
|
}
|
|
*p = '\0';
|
|
return out;
|
|
}
|
|
#endif /* FEATURE_HTTPD_ENCODE_URL_STR */
|
|
|
|
/*
|
|
* Given a URL encoded string, convert it to plain ascii.
|
|
* Since decoding always makes strings smaller, the decode is done in-place.
|
|
* Thus, callers should strdup() the argument if they do not want the
|
|
* argument modified. The return is the original pointer, allowing this
|
|
* function to be easily used as arguments to other functions.
|
|
*
|
|
* string The first string to decode.
|
|
* option_d 1 if called for httpd -d
|
|
*
|
|
* Returns a pointer to the decoded string (same as input).
|
|
*/
|
|
static unsigned hex_to_bin(unsigned char c)
|
|
{
|
|
unsigned v;
|
|
|
|
v = c - '0';
|
|
if (v <= 9)
|
|
return v;
|
|
/* c | 0x20: letters to lower case, non-letters
|
|
* to (potentially different) non-letters */
|
|
v = (unsigned)(c | 0x20) - 'a';
|
|
if (v <= 5)
|
|
return v + 10;
|
|
return ~0;
|
|
}
|
|
/* For testing:
|
|
void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
|
|
int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
|
|
t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
|
|
*/
|
|
static char *decodeString(char *orig, int option_d)
|
|
{
|
|
/* note that decoded string is always shorter than original */
|
|
char *string = orig;
|
|
char *ptr = string;
|
|
char c;
|
|
|
|
while ((c = *ptr++) != '\0') {
|
|
unsigned v;
|
|
|
|
if (option_d && c == '+') {
|
|
*string++ = ' ';
|
|
continue;
|
|
}
|
|
if (c != '%') {
|
|
*string++ = c;
|
|
continue;
|
|
}
|
|
v = hex_to_bin(ptr[0]);
|
|
if (v > 15) {
|
|
bad_hex:
|
|
if (!option_d)
|
|
return NULL;
|
|
*string++ = '%';
|
|
continue;
|
|
}
|
|
v = (v * 16) | hex_to_bin(ptr[1]);
|
|
if (v > 255)
|
|
goto bad_hex;
|
|
if (!option_d && (v == '/' || v == '\0')) {
|
|
/* caller takes it as indication of invalid
|
|
* (dangerous wrt exploits) chars */
|
|
return orig + 1;
|
|
}
|
|
*string++ = v;
|
|
ptr += 2;
|
|
}
|
|
*string = '\0';
|
|
return orig;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
/*
|
|
* Decode a base64 data stream as per rfc1521.
|
|
* Note that the rfc states that non base64 chars are to be ignored.
|
|
* Since the decode always results in a shorter size than the input,
|
|
* it is OK to pass the input arg as an output arg.
|
|
* Parameter: a pointer to a base64 encoded string.
|
|
* Decoded data is stored in-place.
|
|
*/
|
|
static void decodeBase64(char *Data)
|
|
{
|
|
const unsigned char *in = (const unsigned char *)Data;
|
|
/* The decoded size will be at most 3/4 the size of the encoded */
|
|
unsigned ch = 0;
|
|
int i = 0;
|
|
|
|
while (*in) {
|
|
int t = *in++;
|
|
|
|
if (t >= '0' && t <= '9')
|
|
t = t - '0' + 52;
|
|
else if (t >= 'A' && t <= 'Z')
|
|
t = t - 'A';
|
|
else if (t >= 'a' && t <= 'z')
|
|
t = t - 'a' + 26;
|
|
else if (t == '+')
|
|
t = 62;
|
|
else if (t == '/')
|
|
t = 63;
|
|
else if (t == '=')
|
|
t = 0;
|
|
else
|
|
continue;
|
|
|
|
ch = (ch << 6) | t;
|
|
i++;
|
|
if (i == 4) {
|
|
*Data++ = (char) (ch >> 16);
|
|
*Data++ = (char) (ch >> 8);
|
|
*Data++ = (char) ch;
|
|
i = 0;
|
|
}
|
|
}
|
|
*Data = '\0';
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Create a listen server socket on the designated port.
|
|
*/
|
|
static int openServer(void)
|
|
{
|
|
int n = bb_strtou(bind_addr_or_port, NULL, 10);
|
|
if (!errno && n && n <= 0xffff)
|
|
n = create_and_bind_stream_or_die(NULL, n);
|
|
else
|
|
n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
|
|
xlisten(n, 9);
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* Log the connection closure and exit.
|
|
*/
|
|
static void log_and_exit(void) ATTRIBUTE_NORETURN;
|
|
static void log_and_exit(void)
|
|
{
|
|
/* Paranoia. IE said to be buggy. It may send some extra data
|
|
* or be confused by us just exiting without SHUT_WR. Oh well. */
|
|
shutdown(1, SHUT_WR);
|
|
ndelay_on(0);
|
|
while (read(0, iobuf, IOBUF_SIZE) > 0)
|
|
continue;
|
|
|
|
if (verbose > 2)
|
|
bb_error_msg("closed");
|
|
_exit(xfunc_error_retval);
|
|
}
|
|
|
|
/*
|
|
* Create and send HTTP response headers.
|
|
* The arguments are combined and sent as one write operation. Note that
|
|
* IE will puke big-time if the headers are not sent in one packet and the
|
|
* second packet is delayed for any reason.
|
|
* responseNum - the result code to send.
|
|
*/
|
|
static void send_headers(int responseNum)
|
|
{
|
|
static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
|
|
|
|
const char *responseString = "";
|
|
const char *infoString = NULL;
|
|
const char *mime_type;
|
|
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
|
const char *error_page = 0;
|
|
#endif
|
|
unsigned i;
|
|
time_t timer = time(0);
|
|
char tmp_str[80];
|
|
int len;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
|
if (http_response_type[i] == responseNum) {
|
|
responseString = http_response[i].name;
|
|
infoString = http_response[i].info;
|
|
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
|
error_page = http_error_page[i];
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
/* error message is HTML */
|
|
mime_type = responseNum == HTTP_OK ?
|
|
found_mime_type : "text/html";
|
|
|
|
if (verbose)
|
|
bb_error_msg("response:%u", responseNum);
|
|
|
|
/* emit the current date */
|
|
strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
|
|
len = sprintf(iobuf,
|
|
"HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
|
|
"Date: %s\r\nConnection: close\r\n",
|
|
responseNum, responseString, mime_type, tmp_str);
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
if (responseNum == HTTP_UNAUTHORIZED) {
|
|
len += sprintf(iobuf + len,
|
|
"WWW-Authenticate: Basic realm=\"%s\"\r\n",
|
|
g_realm);
|
|
}
|
|
#endif
|
|
if (responseNum == HTTP_MOVED_TEMPORARILY) {
|
|
len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
|
|
found_moved_temporarily,
|
|
(g_query ? "?" : ""),
|
|
(g_query ? g_query : ""));
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
|
if (error_page && !access(error_page, R_OK)) {
|
|
strcat(iobuf, "\r\n");
|
|
len += 2;
|
|
|
|
if (DEBUG)
|
|
fprintf(stderr, "headers: '%s'\n", iobuf);
|
|
full_write(1, iobuf, len);
|
|
if (DEBUG)
|
|
fprintf(stderr, "writing error page: '%s'\n", error_page);
|
|
return send_file_and_exit(error_page, FALSE);
|
|
}
|
|
#endif
|
|
|
|
if (file_size != -1) { /* file */
|
|
strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
|
|
#if ENABLE_FEATURE_HTTPD_RANGES
|
|
if (responseNum == HTTP_PARTIAL_CONTENT) {
|
|
len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"d-%"OFF_FMT"d/%"OFF_FMT"d\r\n",
|
|
range_start,
|
|
range_end,
|
|
file_size);
|
|
file_size = range_end - range_start + 1;
|
|
}
|
|
#endif
|
|
len += sprintf(iobuf + len,
|
|
#if ENABLE_FEATURE_HTTPD_RANGES
|
|
"Accept-Ranges: bytes\r\n"
|
|
#endif
|
|
"Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
|
|
tmp_str,
|
|
"Content-length:",
|
|
file_size
|
|
);
|
|
}
|
|
iobuf[len++] = '\r';
|
|
iobuf[len++] = '\n';
|
|
if (infoString) {
|
|
len += sprintf(iobuf + len,
|
|
"<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
|
|
"<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
|
|
responseNum, responseString,
|
|
responseNum, responseString, infoString);
|
|
}
|
|
if (DEBUG)
|
|
fprintf(stderr, "headers: '%s'\n", iobuf);
|
|
if (full_write(1, iobuf, len) != len) {
|
|
if (verbose > 1)
|
|
bb_perror_msg("error");
|
|
log_and_exit();
|
|
}
|
|
}
|
|
|
|
static void send_headers_and_exit(int responseNum) ATTRIBUTE_NORETURN;
|
|
static void send_headers_and_exit(int responseNum)
|
|
{
|
|
send_headers(responseNum);
|
|
log_and_exit();
|
|
}
|
|
|
|
/*
|
|
* Read from the socket until '\n' or EOF. '\r' chars are removed.
|
|
* '\n' is replaced with NUL.
|
|
* Return number of characters read or 0 if nothing is read
|
|
* ('\r' and '\n' are not counted).
|
|
* Data is returned in iobuf.
|
|
*/
|
|
static int get_line(void)
|
|
{
|
|
int count = 0;
|
|
char c;
|
|
|
|
while (1) {
|
|
if (hdr_cnt <= 0) {
|
|
hdr_cnt = safe_read(0, hdr_buf, sizeof(hdr_buf));
|
|
if (hdr_cnt <= 0)
|
|
break;
|
|
hdr_ptr = hdr_buf;
|
|
}
|
|
iobuf[count] = c = *hdr_ptr++;
|
|
hdr_cnt--;
|
|
|
|
if (c == '\r')
|
|
continue;
|
|
if (c == '\n') {
|
|
iobuf[count] = '\0';
|
|
return count;
|
|
}
|
|
if (count < (IOBUF_SIZE - 1)) /* check overflow */
|
|
count++;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_CGI
|
|
|
|
/* gcc 4.2.1 fares better with NOINLINE */
|
|
static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) ATTRIBUTE_NORETURN;
|
|
static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
|
|
{
|
|
enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
|
|
struct pollfd pfd[3];
|
|
int out_cnt; /* we buffer a bit of initial CGI output */
|
|
int count;
|
|
|
|
/* iobuf is used for CGI -> network data,
|
|
* hdr_buf is for network -> CGI data (POSTDATA) */
|
|
|
|
/* If CGI dies, we still want to correctly finish reading its output
|
|
* and send it to the peer. So please no SIGPIPEs! */
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
// We inconsistently handle a case when more POSTDATA from network
|
|
// is coming than we expected. We may give *some part* of that
|
|
// extra data to CGI.
|
|
|
|
//if (hdr_cnt > post_len) {
|
|
// /* We got more POSTDATA from network than we expected */
|
|
// hdr_cnt = post_len;
|
|
//}
|
|
post_len -= hdr_cnt;
|
|
/* post_len - number of POST bytes not yet read from network */
|
|
|
|
/* NB: breaking out of this loop jumps to log_and_exit() */
|
|
out_cnt = 0;
|
|
while (1) {
|
|
memset(pfd, 0, sizeof(pfd));
|
|
|
|
pfd[FROM_CGI].fd = fromCgi_rd;
|
|
pfd[FROM_CGI].events = POLLIN;
|
|
|
|
if (toCgi_wr) {
|
|
pfd[TO_CGI].fd = toCgi_wr;
|
|
if (hdr_cnt > 0) {
|
|
pfd[TO_CGI].events = POLLOUT;
|
|
} else if (post_len > 0) {
|
|
pfd[0].events = POLLIN;
|
|
} else {
|
|
/* post_len <= 0 && hdr_cnt <= 0:
|
|
* no more POST data to CGI,
|
|
* let CGI see EOF on CGI's stdin */
|
|
close(toCgi_wr);
|
|
toCgi_wr = 0;
|
|
}
|
|
}
|
|
|
|
/* Now wait on the set of sockets */
|
|
count = safe_poll(pfd, 3, -1);
|
|
if (count <= 0) {
|
|
#if 0
|
|
if (waitpid(pid, &status, WNOHANG) <= 0) {
|
|
/* Weird. CGI didn't exit and no fd's
|
|
* are ready, yet poll returned?! */
|
|
continue;
|
|
}
|
|
if (DEBUG && WIFEXITED(status))
|
|
bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
|
|
if (DEBUG && WIFSIGNALED(status))
|
|
bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
if (pfd[TO_CGI].revents) {
|
|
/* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
|
|
/* Have data from peer and can write to CGI */
|
|
count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
|
|
/* Doesn't happen, we dont use nonblocking IO here
|
|
*if (count < 0 && errno == EAGAIN) {
|
|
* ...
|
|
*} else */
|
|
if (count > 0) {
|
|
hdr_ptr += count;
|
|
hdr_cnt -= count;
|
|
} else {
|
|
/* EOF/broken pipe to CGI, stop piping POST data */
|
|
hdr_cnt = post_len = 0;
|
|
}
|
|
}
|
|
|
|
if (pfd[0].revents) {
|
|
/* post_len > 0 && hdr_cnt == 0 here */
|
|
/* We expect data, prev data portion is eaten by CGI
|
|
* and there *is* data to read from the peer
|
|
* (POSTDATA) */
|
|
//count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
|
|
//count = safe_read(0, hdr_buf, count);
|
|
count = safe_read(0, hdr_buf, sizeof(hdr_buf));
|
|
if (count > 0) {
|
|
hdr_cnt = count;
|
|
hdr_ptr = hdr_buf;
|
|
post_len -= count;
|
|
} else {
|
|
/* no more POST data can be read */
|
|
post_len = 0;
|
|
}
|
|
}
|
|
|
|
if (pfd[FROM_CGI].revents) {
|
|
/* There is something to read from CGI */
|
|
char *rbuf = iobuf;
|
|
|
|
/* Are we still buffering CGI output? */
|
|
if (out_cnt >= 0) {
|
|
/* HTTP_200[] has single "\r\n" at the end.
|
|
* According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
|
|
* CGI scripts MUST send their own header terminated by
|
|
* empty line, then data. That's why we have only one
|
|
* <cr><lf> pair here. We will output "200 OK" line
|
|
* if needed, but CGI still has to provide blank line
|
|
* between header and body */
|
|
|
|
/* Must use safe_read, not full_read, because
|
|
* CGI may output a few first bytes and then wait
|
|
* for POSTDATA without closing stdout.
|
|
* With full_read we may wait here forever. */
|
|
count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
|
|
if (count <= 0) {
|
|
/* eof (or error) and there was no "HTTP",
|
|
* so write it, then write received data */
|
|
if (out_cnt) {
|
|
full_write(1, HTTP_200, sizeof(HTTP_200)-1);
|
|
full_write(1, rbuf, out_cnt);
|
|
}
|
|
break; /* CGI stdout is closed, exiting */
|
|
}
|
|
out_cnt += count;
|
|
count = 0;
|
|
/* "Status" header format is: "Status: 302 Redirected\r\n" */
|
|
if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
|
|
/* send "HTTP/1.0 " */
|
|
if (full_write(1, HTTP_200, 9) != 9)
|
|
break;
|
|
rbuf += 8; /* skip "Status: " */
|
|
count = out_cnt - 8;
|
|
out_cnt = -1; /* buffering off */
|
|
} else if (out_cnt >= 4) {
|
|
/* Did CGI add "HTTP"? */
|
|
if (memcmp(rbuf, HTTP_200, 4) != 0) {
|
|
/* there is no "HTTP", do it ourself */
|
|
if (full_write(1, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
|
|
break;
|
|
}
|
|
/* Commented out:
|
|
if (!strstr(rbuf, "ontent-")) {
|
|
full_write(s, "Content-type: text/plain\r\n\r\n", 28);
|
|
}
|
|
* Counter-example of valid CGI without Content-type:
|
|
* echo -en "HTTP/1.0 302 Found\r\n"
|
|
* echo -en "Location: http://www.busybox.net\r\n"
|
|
* echo -en "\r\n"
|
|
*/
|
|
count = out_cnt;
|
|
out_cnt = -1; /* buffering off */
|
|
}
|
|
} else {
|
|
count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
|
|
if (count <= 0)
|
|
break; /* eof (or error) */
|
|
}
|
|
if (full_write(1, rbuf, count) != count)
|
|
break;
|
|
if (DEBUG)
|
|
fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
|
|
} /* if (pfd[FROM_CGI].revents) */
|
|
} /* while (1) */
|
|
log_and_exit();
|
|
}
|
|
|
|
static void setenv1(const char *name, const char *value)
|
|
{
|
|
setenv(name, value ? value : "", 1);
|
|
}
|
|
|
|
/*
|
|
* Spawn CGI script, forward CGI's stdin/out <=> network
|
|
*
|
|
* Environment variables are set up and the script is invoked with pipes
|
|
* for stdin/stdout. If a POST is being done the script is fed the POST
|
|
* data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
|
|
*
|
|
* Parameters:
|
|
* const char *url The requested URL (with leading /).
|
|
* int post_len Length of the POST body.
|
|
* const char *cookie For set HTTP_COOKIE.
|
|
* const char *content_type For set CONTENT_TYPE.
|
|
*/
|
|
static void send_cgi_and_exit(
|
|
const char *url,
|
|
const char *request,
|
|
int post_len,
|
|
const char *cookie,
|
|
const char *content_type) ATTRIBUTE_NORETURN;
|
|
static void send_cgi_and_exit(
|
|
const char *url,
|
|
const char *request,
|
|
int post_len,
|
|
const char *cookie,
|
|
const char *content_type)
|
|
{
|
|
struct { int rd; int wr; } fromCgi; /* CGI -> httpd pipe */
|
|
struct { int rd; int wr; } toCgi; /* httpd -> CGI pipe */
|
|
char *fullpath;
|
|
char *script;
|
|
char *purl;
|
|
int pid;
|
|
|
|
/*
|
|
* We are mucking with environment _first_ and then vfork/exec,
|
|
* this allows us to use vfork safely. Parent don't care about
|
|
* these environment changes anyway.
|
|
*/
|
|
|
|
/*
|
|
* Find PATH_INFO.
|
|
*/
|
|
purl = xstrdup(url);
|
|
script = purl;
|
|
while ((script = strchr(script + 1, '/')) != NULL) {
|
|
/* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
|
|
struct stat sb;
|
|
|
|
*script = '\0';
|
|
if (!is_directory(purl + 1, 1, &sb)) {
|
|
/* not directory, found script.cgi/PATH_INFO */
|
|
*script = '/';
|
|
break;
|
|
}
|
|
*script = '/'; /* is directory, find next '/' */
|
|
}
|
|
setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
|
|
setenv1("REQUEST_METHOD", request);
|
|
if (g_query) {
|
|
putenv(xasprintf("%s=%s?%s", "REQUEST_URI", purl, g_query));
|
|
} else {
|
|
setenv1("REQUEST_URI", purl);
|
|
}
|
|
if (script != NULL)
|
|
*script = '\0'; /* cut off /PATH_INFO */
|
|
|
|
/* SCRIPT_FILENAME required by PHP in CGI mode */
|
|
fullpath = concat_path_file(home_httpd, purl);
|
|
setenv1("SCRIPT_FILENAME", fullpath);
|
|
/* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
|
|
setenv1("SCRIPT_NAME", purl);
|
|
/* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
|
|
* QUERY_STRING: The information which follows the ? in the URL
|
|
* which referenced this script. This is the query information.
|
|
* It should not be decoded in any fashion. This variable
|
|
* should always be set when there is query information,
|
|
* regardless of command line decoding. */
|
|
/* (Older versions of bbox seem to do some decoding) */
|
|
setenv1("QUERY_STRING", g_query);
|
|
putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
|
|
putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
|
|
putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
|
|
/* Having _separate_ variables for IP and port defeats
|
|
* the purpose of having socket abstraction. Which "port"
|
|
* are you using on Unix domain socket?
|
|
* IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
|
|
* Oh well... */
|
|
{
|
|
char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
|
|
char *cp = strrchr(p, ':');
|
|
if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
|
|
cp = NULL;
|
|
if (cp) *cp = '\0'; /* delete :PORT */
|
|
setenv1("REMOTE_ADDR", p);
|
|
if (cp) {
|
|
*cp = ':';
|
|
#if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
|
|
setenv1("REMOTE_PORT", cp + 1);
|
|
#endif
|
|
}
|
|
}
|
|
setenv1("HTTP_USER_AGENT", user_agent);
|
|
if (post_len)
|
|
putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
|
|
if (cookie)
|
|
setenv1("HTTP_COOKIE", cookie);
|
|
if (content_type)
|
|
setenv1("CONTENT_TYPE", content_type);
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
if (remoteuser) {
|
|
setenv1("REMOTE_USER", remoteuser);
|
|
putenv((char*)"AUTH_TYPE=Basic");
|
|
}
|
|
#endif
|
|
if (referer)
|
|
setenv1("HTTP_REFERER", referer);
|
|
|
|
xpipe(&fromCgi.rd);
|
|
xpipe(&toCgi.rd);
|
|
|
|
pid = vfork();
|
|
if (pid < 0) {
|
|
/* TODO: log perror? */
|
|
log_and_exit();
|
|
}
|
|
|
|
if (!pid) {
|
|
/* Child process */
|
|
xfunc_error_retval = 242;
|
|
|
|
xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
|
|
xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
|
|
close(fromCgi.rd);
|
|
close(toCgi.wr);
|
|
/* User seeing stderr output can be a security problem.
|
|
* If CGI really wants that, it can always do dup itself. */
|
|
/* dup2(1, 2); */
|
|
|
|
/* script must have absolute path */
|
|
script = strrchr(fullpath, '/');
|
|
if (!script)
|
|
goto error_execing_cgi;
|
|
*script = '\0';
|
|
/* chdiring to script's dir */
|
|
if (chdir(fullpath) == 0) {
|
|
char *argv[2];
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
char *interpr = NULL;
|
|
char *suffix = strrchr(purl, '.');
|
|
|
|
if (suffix) {
|
|
Htaccess *cur;
|
|
for (cur = script_i; cur; cur = cur->next) {
|
|
if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
|
interpr = cur->after_colon;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
*script = '/';
|
|
/* set argv[0] to name without path */
|
|
argv[0] = (char*)bb_basename(purl);
|
|
argv[1] = NULL;
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
if (interpr)
|
|
execv(interpr, argv);
|
|
else
|
|
#endif
|
|
execv(fullpath, argv);
|
|
}
|
|
error_execing_cgi:
|
|
/* send to stdout
|
|
* (we are CGI here, our stdout is pumped to the net) */
|
|
send_headers_and_exit(HTTP_NOT_FOUND);
|
|
} /* end child */
|
|
|
|
/* Parent process */
|
|
|
|
/* Restore variables possibly changed by child */
|
|
xfunc_error_retval = 0;
|
|
|
|
/* Pump data */
|
|
close(fromCgi.wr);
|
|
close(toCgi.rd);
|
|
cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
|
|
}
|
|
|
|
#endif /* FEATURE_HTTPD_CGI */
|
|
|
|
/*
|
|
* Send a file response to a HTTP request, and exit
|
|
*
|
|
* Parameters:
|
|
* const char *url The requested URL (with leading /).
|
|
* headers Don't send headers before if FALSE.
|
|
*/
|
|
static void send_file_and_exit(const char *url, int headers)
|
|
{
|
|
static const char *const suffixTable[] = {
|
|
/* Warning: shorter equivalent suffix in one line must be first */
|
|
".htm.html", "text/html",
|
|
".jpg.jpeg", "image/jpeg",
|
|
".gif", "image/gif",
|
|
".png", "image/png",
|
|
".txt.h.c.cc.cpp", "text/plain",
|
|
".css", "text/css",
|
|
".wav", "audio/wav",
|
|
".avi", "video/x-msvideo",
|
|
".qt.mov", "video/quicktime",
|
|
".mpe.mpeg", "video/mpeg",
|
|
".mid.midi", "audio/midi",
|
|
".mp3", "audio/mpeg",
|
|
#if 0 /* unpopular */
|
|
".au", "audio/basic",
|
|
".pac", "application/x-ns-proxy-autoconfig",
|
|
".vrml.wrl", "model/vrml",
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
char *suffix;
|
|
int f;
|
|
const char *const *table;
|
|
const char *try_suffix;
|
|
ssize_t count;
|
|
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
|
off_t offset;
|
|
#endif
|
|
|
|
suffix = strrchr(url, '.');
|
|
|
|
/* If not found, set default as "application/octet-stream"; */
|
|
found_mime_type = "application/octet-stream";
|
|
if (suffix) {
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
|
Htaccess *cur;
|
|
#endif
|
|
for (table = suffixTable; *table; table += 2) {
|
|
try_suffix = strstr(table[0], suffix);
|
|
if (try_suffix) {
|
|
try_suffix += strlen(suffix);
|
|
if (*try_suffix == '\0' || *try_suffix == '.') {
|
|
found_mime_type = table[1];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
|
for (cur = mime_a; cur; cur = cur->next) {
|
|
if (strcmp(cur->before_colon, suffix) == 0) {
|
|
found_mime_type = cur->after_colon;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (DEBUG)
|
|
bb_error_msg("sending file '%s' content-type: %s",
|
|
url, found_mime_type);
|
|
|
|
f = open(url, O_RDONLY);
|
|
if (f < 0) {
|
|
if (DEBUG)
|
|
bb_perror_msg("cannot open '%s'", url);
|
|
if (headers)
|
|
send_headers_and_exit(HTTP_NOT_FOUND);
|
|
}
|
|
#if ENABLE_FEATURE_HTTPD_RANGES
|
|
if (!headers)
|
|
range_start = 0; /* err pages and ranges don't mix */
|
|
range_len = MAXINT(off_t);
|
|
if (range_start) {
|
|
if (!range_end) {
|
|
range_end = file_size - 1;
|
|
}
|
|
if (range_end < range_start
|
|
|| lseek(f, range_start, SEEK_SET) != range_start
|
|
) {
|
|
lseek(f, 0, SEEK_SET);
|
|
range_start = 0;
|
|
} else {
|
|
range_len = range_end - range_start + 1;
|
|
send_headers(HTTP_PARTIAL_CONTENT);
|
|
headers = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (headers)
|
|
send_headers(HTTP_OK);
|
|
|
|
/* If you want to know about EPIPE below
|
|
* (happens if you abort downloads from local httpd): */
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
|
offset = range_start;
|
|
do {
|
|
/* sz is rounded down to 64k */
|
|
ssize_t sz = MAXINT(ssize_t) - 0xffff;
|
|
USE_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
|
|
count = sendfile(1, f, &offset, sz);
|
|
if (count < 0) {
|
|
if (offset == range_start)
|
|
goto fallback;
|
|
goto fin;
|
|
}
|
|
USE_FEATURE_HTTPD_RANGES(range_len -= sz;)
|
|
} while (count > 0 && range_len);
|
|
log_and_exit();
|
|
|
|
fallback:
|
|
#endif
|
|
while ((count = safe_read(f, iobuf, IOBUF_SIZE)) > 0) {
|
|
ssize_t n;
|
|
USE_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
|
|
n = full_write(1, iobuf, count);
|
|
if (count != n)
|
|
break;
|
|
USE_FEATURE_HTTPD_RANGES(range_len -= count;)
|
|
if (!range_len)
|
|
break;
|
|
}
|
|
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
|
fin:
|
|
#endif
|
|
if (count < 0 && verbose > 1)
|
|
bb_perror_msg("error");
|
|
log_and_exit();
|
|
}
|
|
|
|
static int checkPermIP(void)
|
|
{
|
|
Htaccess_IP *cur;
|
|
|
|
/* This could stand some work */
|
|
for (cur = ip_a_d; cur; cur = cur->next) {
|
|
#if DEBUG
|
|
fprintf(stderr,
|
|
"checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
|
|
rmt_ip_str,
|
|
(unsigned char)(cur->ip >> 24),
|
|
(unsigned char)(cur->ip >> 16),
|
|
(unsigned char)(cur->ip >> 8),
|
|
(unsigned char)(cur->ip),
|
|
(unsigned char)(cur->mask >> 24),
|
|
(unsigned char)(cur->mask >> 16),
|
|
(unsigned char)(cur->mask >> 8),
|
|
(unsigned char)(cur->mask)
|
|
);
|
|
#endif
|
|
if ((rmt_ip & cur->mask) == cur->ip)
|
|
return cur->allow_deny == 'A'; /* Allow/Deny */
|
|
}
|
|
|
|
/* if unconfigured, return 1 - access from all */
|
|
return !flg_deny_all;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
/*
|
|
* Check the permission file for access password protected.
|
|
*
|
|
* If config file isn't present, everything is allowed.
|
|
* Entries are of the form you can see example from header source
|
|
*
|
|
* path The file path.
|
|
* request User information to validate.
|
|
*
|
|
* Returns 1 if request is OK.
|
|
*/
|
|
static int checkPerm(const char *path, const char *request)
|
|
{
|
|
Htaccess *cur;
|
|
const char *p;
|
|
const char *p0;
|
|
|
|
const char *prev = NULL;
|
|
|
|
/* This could stand some work */
|
|
for (cur = g_auth; cur; cur = cur->next) {
|
|
size_t l;
|
|
|
|
p0 = cur->before_colon;
|
|
if (prev != NULL && strcmp(prev, p0) != 0)
|
|
continue; /* find next identical */
|
|
p = cur->after_colon;
|
|
if (DEBUG)
|
|
fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
|
|
|
|
l = strlen(p0);
|
|
if (strncmp(p0, path, l) == 0
|
|
&& (l == 1 || path[l] == '/' || path[l] == '\0')
|
|
) {
|
|
char *u;
|
|
/* path match found. Check request */
|
|
/* for check next /path:user:password */
|
|
prev = p0;
|
|
u = strchr(request, ':');
|
|
if (u == NULL) {
|
|
/* bad request, ':' required */
|
|
break;
|
|
}
|
|
|
|
if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
|
|
char *cipher;
|
|
char *pp;
|
|
|
|
if (strncmp(p, request, u - request) != 0) {
|
|
/* user doesn't match */
|
|
continue;
|
|
}
|
|
pp = strchr(p, ':');
|
|
if (pp && pp[1] == '$' && pp[2] == '1'
|
|
&& pp[3] == '$' && pp[4]
|
|
) {
|
|
pp++;
|
|
cipher = pw_encrypt(u+1, pp);
|
|
if (strcmp(cipher, pp) == 0)
|
|
goto set_remoteuser_var; /* Ok */
|
|
/* unauthorized */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (strcmp(p, request) == 0) {
|
|
set_remoteuser_var:
|
|
remoteuser = strdup(request);
|
|
if (remoteuser)
|
|
remoteuser[u - request] = '\0';
|
|
return 1; /* Ok */
|
|
}
|
|
/* unauthorized */
|
|
}
|
|
} /* for */
|
|
|
|
return prev == NULL;
|
|
}
|
|
#endif /* FEATURE_HTTPD_BASIC_AUTH */
|
|
|
|
/*
|
|
* Handle timeouts
|
|
*/
|
|
static void exit_on_signal(int sig) ATTRIBUTE_NORETURN;
|
|
static void exit_on_signal(int sig)
|
|
{
|
|
send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
|
|
}
|
|
|
|
/*
|
|
* Handle an incoming http request and exit.
|
|
*/
|
|
static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) ATTRIBUTE_NORETURN;
|
|
static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
|
|
{
|
|
static const char request_GET[] ALIGN1 = "GET";
|
|
|
|
struct stat sb;
|
|
char *urlcopy;
|
|
char *urlp;
|
|
char *tptr;
|
|
int http_major_version;
|
|
int ip_allowed;
|
|
#if ENABLE_FEATURE_HTTPD_CGI
|
|
const char *prequest;
|
|
unsigned long length = 0;
|
|
char *cookie = 0;
|
|
char *content_type = 0;
|
|
#endif
|
|
struct sigaction sa;
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
int credentials = -1; /* if not required this is Ok */
|
|
#endif
|
|
|
|
/* Allocation of iobuf is postponed until now
|
|
* (IOW, server process doesn't need to waste 8k) */
|
|
iobuf = xmalloc(IOBUF_SIZE);
|
|
|
|
rmt_ip = 0;
|
|
if (fromAddr->sa.sa_family == AF_INET) {
|
|
rmt_ip = ntohl(fromAddr->sin.sin_addr.s_addr);
|
|
}
|
|
#if ENABLE_FEATURE_IPV6
|
|
if (fromAddr->sa.sa_family == AF_INET6
|
|
&& fromAddr->sin6.sin6_addr.s6_addr32[0] == 0
|
|
&& fromAddr->sin6.sin6_addr.s6_addr32[1] == 0
|
|
&& ntohl(fromAddr->sin6.sin6_addr.s6_addr32[2]) == 0xffff)
|
|
rmt_ip = ntohl(fromAddr->sin6.sin6_addr.s6_addr32[3]);
|
|
#endif
|
|
if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
|
|
rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->sa);
|
|
}
|
|
if (verbose) {
|
|
/* this trick makes -v logging much simpler */
|
|
applet_name = rmt_ip_str;
|
|
if (verbose > 2)
|
|
bb_error_msg("connected");
|
|
}
|
|
|
|
/* Install timeout handler */
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = exit_on_signal;
|
|
/* sigemptyset(&sa.sa_mask); - memset should be enough */
|
|
/*sa.sa_flags = 0; - no SA_RESTART */
|
|
sigaction(SIGALRM, &sa, NULL);
|
|
alarm(HEADER_READ_TIMEOUT);
|
|
|
|
if (!get_line()) /* EOF or error or empty line */
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
|
|
/* Determine type of request (GET/POST) */
|
|
urlp = strpbrk(iobuf, " \t");
|
|
if (urlp == NULL)
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
*urlp++ = '\0';
|
|
#if ENABLE_FEATURE_HTTPD_CGI
|
|
prequest = request_GET;
|
|
if (strcasecmp(iobuf, prequest) != 0) {
|
|
prequest = "POST";
|
|
if (strcasecmp(iobuf, prequest) != 0)
|
|
send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
|
}
|
|
#else
|
|
if (strcasecmp(iobuf, request_GET) != 0)
|
|
send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
|
#endif
|
|
urlp = skip_whitespace(urlp);
|
|
if (urlp[0] != '/')
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
|
|
/* Find end of URL and parse HTTP version, if any */
|
|
http_major_version = -1;
|
|
tptr = strchrnul(urlp, ' ');
|
|
/* Is it " HTTP/"? */
|
|
if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0)
|
|
http_major_version = (tptr[6] - '0');
|
|
*tptr = '\0';
|
|
|
|
/* Copy URL from after "GET "/"POST " to stack-allocated char[] */
|
|
urlcopy = alloca((tptr - urlp) + sizeof("/index.html"));
|
|
/*if (urlcopy == NULL)
|
|
* send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
|
|
strcpy(urlcopy, urlp);
|
|
/* NB: urlcopy ptr is never changed after this */
|
|
|
|
/* Extract url args if present */
|
|
tptr = strchr(urlcopy, '?');
|
|
g_query = NULL;
|
|
if (tptr) {
|
|
*tptr++ = '\0';
|
|
g_query = tptr;
|
|
}
|
|
|
|
/* Decode URL escape sequences */
|
|
tptr = decodeString(urlcopy, 0);
|
|
if (tptr == NULL)
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
if (tptr == urlcopy + 1) {
|
|
/* '/' or NUL is encoded */
|
|
send_headers_and_exit(HTTP_NOT_FOUND);
|
|
}
|
|
|
|
/* Canonicalize path */
|
|
/* Algorithm stolen from libbb bb_simplify_path(),
|
|
* but don't strdup and reducing trailing slash and protect out root */
|
|
urlp = tptr = urlcopy;
|
|
do {
|
|
if (*urlp == '/') {
|
|
/* skip duplicate (or initial) slash */
|
|
if (*tptr == '/') {
|
|
continue;
|
|
}
|
|
if (*tptr == '.') {
|
|
/* skip extra '.' */
|
|
if (tptr[1] == '/' || !tptr[1]) {
|
|
continue;
|
|
}
|
|
/* '..': be careful */
|
|
if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
|
|
++tptr;
|
|
if (urlp == urlcopy) /* protect root */
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
while (*--urlp != '/') /* omit previous dir */;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
*++urlp = *tptr;
|
|
} while (*++tptr);
|
|
*++urlp = '\0'; /* so keep last character */
|
|
tptr = urlp; /* end ptr */
|
|
|
|
/* If URL is a directory, add '/' */
|
|
if (tptr[-1] != '/') {
|
|
if (is_directory(urlcopy + 1, 1, &sb)) {
|
|
found_moved_temporarily = urlcopy;
|
|
}
|
|
}
|
|
|
|
/* Log it */
|
|
if (verbose > 1)
|
|
bb_error_msg("url:%s", urlcopy);
|
|
|
|
tptr = urlcopy;
|
|
ip_allowed = checkPermIP();
|
|
while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
|
|
/* have path1/path2 */
|
|
*tptr = '\0';
|
|
if (is_directory(urlcopy + 1, 1, &sb)) {
|
|
/* may be having subdir config */
|
|
parse_conf(urlcopy + 1, SUBDIR_PARSE);
|
|
ip_allowed = checkPermIP();
|
|
}
|
|
*tptr = '/';
|
|
}
|
|
if (http_major_version >= 0) {
|
|
/* Request was with "... HTTP/nXXX", and n >= 0 */
|
|
|
|
/* Read until blank line for HTTP version specified, else parse immediate */
|
|
while (1) {
|
|
alarm(HEADER_READ_TIMEOUT);
|
|
if (!get_line())
|
|
break; /* EOF or error or empty line */
|
|
if (DEBUG)
|
|
bb_error_msg("header: '%s'", iobuf);
|
|
|
|
#if ENABLE_FEATURE_HTTPD_CGI
|
|
/* try and do our best to parse more lines */
|
|
if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
|
|
/* extra read only for POST */
|
|
if (prequest != request_GET) {
|
|
tptr = iobuf + sizeof("Content-length:") - 1;
|
|
if (!tptr[0])
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
errno = 0;
|
|
/* not using strtoul: it ignores leading minus! */
|
|
length = strtol(tptr, &tptr, 10);
|
|
/* length is "ulong", but we need to pass it to int later */
|
|
/* so we check for negative or too large values in one go: */
|
|
/* (long -> ulong conv caused negatives to be seen as > INT_MAX) */
|
|
if (tptr[0] || errno || length > INT_MAX)
|
|
send_headers_and_exit(HTTP_BAD_REQUEST);
|
|
}
|
|
} else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
|
|
cookie = strdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
|
|
} else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
|
|
content_type = strdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
|
|
} else if (STRNCASECMP(iobuf, "Referer:") == 0) {
|
|
referer = strdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
|
|
} else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
|
|
user_agent = strdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
if (STRNCASECMP(iobuf, "Authorization:") == 0) {
|
|
/* We only allow Basic credentials.
|
|
* It shows up as "Authorization: Basic <userid:password>" where
|
|
* the userid:password is base64 encoded.
|
|
*/
|
|
tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
|
|
if (STRNCASECMP(tptr, "Basic") != 0)
|
|
continue;
|
|
tptr += sizeof("Basic")-1;
|
|
/* decodeBase64() skips whitespace itself */
|
|
decodeBase64(tptr);
|
|
credentials = checkPerm(urlcopy, tptr);
|
|
}
|
|
#endif /* FEATURE_HTTPD_BASIC_AUTH */
|
|
#if ENABLE_FEATURE_HTTPD_RANGES
|
|
if (STRNCASECMP(iobuf, "Range:") == 0) {
|
|
// We know only bytes=NNN-[MMM]
|
|
char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
|
|
if (strncmp(s, "bytes=", 6) == 0) {
|
|
s += sizeof("bytes=")-1;
|
|
range_start = BB_STRTOOFF(s, &s, 10);
|
|
if (s[0] != '-' || range_start < 0) {
|
|
range_start = 0;
|
|
} else if (s[1]) {
|
|
range_end = BB_STRTOOFF(s+1, NULL, 10);
|
|
if (errno || range_end < range_start)
|
|
range_start = 0;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
} /* while extra header reading */
|
|
}
|
|
|
|
/* We read headers, disable peer timeout */
|
|
alarm(0);
|
|
|
|
if (strcmp(bb_basename(urlcopy), httpd_conf) == 0 || ip_allowed == 0) {
|
|
/* protect listing [/path]/httpd_conf or IP deny */
|
|
send_headers_and_exit(HTTP_FORBIDDEN);
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
|
if (credentials <= 0 && checkPerm(urlcopy, ":") == 0) {
|
|
send_headers_and_exit(HTTP_UNAUTHORIZED);
|
|
}
|
|
#endif
|
|
|
|
if (found_moved_temporarily) {
|
|
send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
|
|
}
|
|
|
|
tptr = urlcopy + 1; /* skip first '/' */
|
|
|
|
#if ENABLE_FEATURE_HTTPD_CGI
|
|
if (strncmp(tptr, "cgi-bin/", 8) == 0) {
|
|
if (tptr[8] == '\0') {
|
|
/* protect listing "cgi-bin/" */
|
|
send_headers_and_exit(HTTP_FORBIDDEN);
|
|
}
|
|
send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
|
|
}
|
|
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
|
{
|
|
char *suffix = strrchr(tptr, '.');
|
|
if (suffix) {
|
|
Htaccess *cur;
|
|
for (cur = script_i; cur; cur = cur->next) {
|
|
if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
|
send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (prequest != request_GET) {
|
|
send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
|
}
|
|
#endif /* FEATURE_HTTPD_CGI */
|
|
|
|
if (urlp[-1] == '/')
|
|
strcpy(urlp, "index.html");
|
|
if (stat(tptr, &sb) == 0) {
|
|
file_size = sb.st_size;
|
|
last_mod = sb.st_mtime;
|
|
}
|
|
#if ENABLE_FEATURE_HTTPD_CGI
|
|
else if (urlp[-1] == '/') {
|
|
/* It's a dir URL and there is no index.html
|
|
* Try cgi-bin/index.cgi */
|
|
if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
|
|
urlp[0] = '\0';
|
|
g_query = urlcopy;
|
|
send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
|
|
}
|
|
}
|
|
#endif
|
|
/* else {
|
|
* fall through to send_file, it errors out if open fails
|
|
* }
|
|
*/
|
|
|
|
send_file_and_exit(tptr, TRUE);
|
|
}
|
|
|
|
/*
|
|
* The main http server function.
|
|
* Given a socket, listen for new connections and farm out
|
|
* the processing as a [v]forked process.
|
|
* Never returns.
|
|
*/
|
|
#if BB_MMU
|
|
static void mini_httpd(int server_socket) ATTRIBUTE_NORETURN;
|
|
static void mini_httpd(int server_socket)
|
|
{
|
|
/* NB: it's best to not use xfuncs in this loop before fork().
|
|
* Otherwise server may die on transient errors (temporary
|
|
* out-of-memory condition, etc), which is Bad(tm).
|
|
* Try to do any dangerous calls after fork.
|
|
*/
|
|
while (1) {
|
|
int n;
|
|
len_and_sockaddr fromAddr;
|
|
|
|
/* Wait for connections... */
|
|
fromAddr.len = LSA_SIZEOF_SA;
|
|
n = accept(server_socket, &fromAddr.sa, &fromAddr.len);
|
|
|
|
if (n < 0)
|
|
continue;
|
|
/* set the KEEPALIVE option to cull dead connections */
|
|
setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
|
|
|
if (fork() == 0) {
|
|
/* child */
|
|
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
|
/* Do not reload config on HUP */
|
|
signal(SIGHUP, SIG_IGN);
|
|
#endif
|
|
close(server_socket);
|
|
xmove_fd(n, 0);
|
|
xdup2(0, 1);
|
|
|
|
handle_incoming_and_exit(&fromAddr);
|
|
}
|
|
/* parent, or fork failed */
|
|
close(n);
|
|
} /* while (1) */
|
|
/* never reached */
|
|
}
|
|
#else
|
|
static void mini_httpd_nommu(int server_socket, int argc, char **argv) ATTRIBUTE_NORETURN;
|
|
static void mini_httpd_nommu(int server_socket, int argc, char **argv)
|
|
{
|
|
char *argv_copy[argc + 2];
|
|
|
|
argv_copy[0] = argv[0];
|
|
argv_copy[1] = (char*)"-i";
|
|
memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
|
|
|
|
/* NB: it's best to not use xfuncs in this loop before vfork().
|
|
* Otherwise server may die on transient errors (temporary
|
|
* out-of-memory condition, etc), which is Bad(tm).
|
|
* Try to do any dangerous calls after fork.
|
|
*/
|
|
while (1) {
|
|
int n;
|
|
len_and_sockaddr fromAddr;
|
|
|
|
/* Wait for connections... */
|
|
fromAddr.len = LSA_SIZEOF_SA;
|
|
n = accept(server_socket, &fromAddr.sa, &fromAddr.len);
|
|
|
|
if (n < 0)
|
|
continue;
|
|
/* set the KEEPALIVE option to cull dead connections */
|
|
setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
|
|
|
if (vfork() == 0) {
|
|
/* child */
|
|
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
|
/* Do not reload config on HUP */
|
|
signal(SIGHUP, SIG_IGN);
|
|
#endif
|
|
close(server_socket);
|
|
xmove_fd(n, 0);
|
|
xdup2(0, 1);
|
|
|
|
/* Run a copy of ourself in inetd mode */
|
|
re_exec(argv_copy);
|
|
}
|
|
/* parent, or vfork failed */
|
|
close(n);
|
|
} /* while (1) */
|
|
/* never reached */
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Process a HTTP connection on stdin/out.
|
|
* Never returns.
|
|
*/
|
|
static void mini_httpd_inetd(void) ATTRIBUTE_NORETURN;
|
|
static void mini_httpd_inetd(void)
|
|
{
|
|
len_and_sockaddr fromAddr;
|
|
|
|
fromAddr.len = LSA_SIZEOF_SA;
|
|
getpeername(0, &fromAddr.sa, &fromAddr.len);
|
|
handle_incoming_and_exit(&fromAddr);
|
|
}
|
|
|
|
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
|
static void sighup_handler(int sig)
|
|
{
|
|
struct sigaction sa;
|
|
|
|
parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
|
|
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = sighup_handler;
|
|
/*sigemptyset(&sa.sa_mask); - memset should be enough */
|
|
sa.sa_flags = SA_RESTART;
|
|
sigaction(SIGHUP, &sa, NULL);
|
|
}
|
|
#endif
|
|
|
|
enum {
|
|
c_opt_config_file = 0,
|
|
d_opt_decode_url,
|
|
h_opt_home_httpd,
|
|
USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
|
|
USE_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
|
|
USE_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
|
|
USE_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
|
|
p_opt_port ,
|
|
p_opt_inetd ,
|
|
p_opt_foreground,
|
|
p_opt_verbose ,
|
|
OPT_CONFIG_FILE = 1 << c_opt_config_file,
|
|
OPT_DECODE_URL = 1 << d_opt_decode_url,
|
|
OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
|
|
OPT_ENCODE_URL = USE_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
|
|
OPT_REALM = USE_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
|
|
OPT_MD5 = USE_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
|
|
OPT_SETUID = USE_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
|
|
OPT_PORT = 1 << p_opt_port,
|
|
OPT_INETD = 1 << p_opt_inetd,
|
|
OPT_FOREGROUND = 1 << p_opt_foreground,
|
|
OPT_VERBOSE = 1 << p_opt_verbose,
|
|
};
|
|
|
|
|
|
int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int httpd_main(int argc, char **argv)
|
|
{
|
|
int server_socket = server_socket; /* for gcc */
|
|
unsigned opt;
|
|
char *url_for_decode;
|
|
USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
|
|
USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
|
|
USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
|
|
USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
|
|
|
|
INIT_G();
|
|
|
|
#if ENABLE_LOCALE_SUPPORT
|
|
/* Undo busybox.c: we want to speak English in http (dates etc) */
|
|
setlocale(LC_TIME, "C");
|
|
#endif
|
|
|
|
home_httpd = xrealloc_getcwd_or_warn(NULL);
|
|
/* -v counts, -i implies -f */
|
|
opt_complementary = "vv:if";
|
|
/* We do not "absolutize" path given by -h (home) opt.
|
|
* If user gives relative path in -h, $SCRIPT_FILENAME can end up
|
|
* relative too. */
|
|
opt = getopt32(argv, "c:d:h:"
|
|
USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
|
|
USE_FEATURE_HTTPD_BASIC_AUTH("r:")
|
|
USE_FEATURE_HTTPD_AUTH_MD5("m:")
|
|
USE_FEATURE_HTTPD_SETUID("u:")
|
|
"p:ifv",
|
|
&configFile, &url_for_decode, &home_httpd
|
|
USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
|
|
USE_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
|
|
USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
|
|
USE_FEATURE_HTTPD_SETUID(, &s_ugid)
|
|
, &bind_addr_or_port
|
|
, &verbose
|
|
);
|
|
if (opt & OPT_DECODE_URL) {
|
|
fputs(decodeString(url_for_decode, 1), stdout);
|
|
return 0;
|
|
}
|
|
#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
|
if (opt & OPT_ENCODE_URL) {
|
|
fputs(encodeString(url_for_encode), stdout);
|
|
return 0;
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_AUTH_MD5
|
|
if (opt & OPT_MD5) {
|
|
puts(pw_encrypt(pass, "$1$"));
|
|
return 0;
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_HTTPD_SETUID
|
|
if (opt & OPT_SETUID) {
|
|
if (!get_uidgid(&ugid, s_ugid, 1))
|
|
bb_error_msg_and_die("unrecognized user[:group] "
|
|
"name '%s'", s_ugid);
|
|
}
|
|
#endif
|
|
|
|
#if !BB_MMU
|
|
if (!(opt & OPT_FOREGROUND)) {
|
|
bb_daemonize_or_rexec(0, argv); /* don't change current directory */
|
|
}
|
|
#endif
|
|
|
|
xchdir(home_httpd);
|
|
if (!(opt & OPT_INETD)) {
|
|
signal(SIGCHLD, SIG_IGN);
|
|
server_socket = openServer();
|
|
#if ENABLE_FEATURE_HTTPD_SETUID
|
|
/* drop privileges */
|
|
if (opt & OPT_SETUID) {
|
|
if (ugid.gid != (gid_t)-1) {
|
|
if (setgroups(1, &ugid.gid) == -1)
|
|
bb_perror_msg_and_die("setgroups");
|
|
xsetgid(ugid.gid);
|
|
}
|
|
xsetuid(ugid.uid);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if 0 /*was #if ENABLE_FEATURE_HTTPD_CGI*/
|
|
/* User can do it himself: 'env - PATH="$PATH" httpd'
|
|
* We don't do it because we don't want to screw users
|
|
* which want to do
|
|
* 'env - VAR1=val1 VAR2=val2 https'
|
|
* and have VAR1 and VAR2 values visible in their CGIs.
|
|
* Besides, it is also smaller. */
|
|
{
|
|
char *p = getenv("PATH");
|
|
/* env strings themself are not freed, no need to strdup(p): */
|
|
clearenv();
|
|
if (p)
|
|
putenv(p - 5);
|
|
// if (!(opt & OPT_INETD))
|
|
// setenv_long("SERVER_PORT", ???);
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
|
if (!(opt & OPT_INETD))
|
|
sighup_handler(0);
|
|
else /* do not install HUP handler in inetd mode */
|
|
#endif
|
|
parse_conf(default_path_httpd_conf, FIRST_PARSE);
|
|
|
|
xfunc_error_retval = 0;
|
|
if (opt & OPT_INETD)
|
|
mini_httpd_inetd();
|
|
#if BB_MMU
|
|
if (!(opt & OPT_FOREGROUND))
|
|
bb_daemonize(0); /* don't change current directory */
|
|
mini_httpd(server_socket); /* never returns */
|
|
#else
|
|
mini_httpd_nommu(server_socket, argc, argv); /* never returns */
|
|
#endif
|
|
/* return 0; */
|
|
}
|