[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * httpd implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
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| 6 | * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 9 | *
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| 10 | *****************************************************************************
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| 11 | *
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| 12 | * Typical usage:
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| 13 | * For non root user:
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| 14 | * httpd -p 8080 -h $HOME/public_html
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| 15 | * For daemon start from rc script with uid=0:
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| 16 | * httpd -u www
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| 17 | * which is equivalent to (assuming user www has uid 80):
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| 18 | * httpd -p 80 -u 80 -h $PWD -c /etc/httpd.conf -r "Web Server Authentication"
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| 19 | *
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| 20 | * When an url starts with "/cgi-bin/" it is assumed to be a cgi script.
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| 21 | * The server changes directory to the location of the script and executes it
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| 22 | * after setting QUERY_STRING and other environment variables.
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| 23 | *
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| 24 | * Doc:
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| 25 | * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
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| 26 | *
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| 27 | * The applet can also be invoked as an url arg decoder and html text encoder
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| 28 | * as follows:
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| 29 | * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
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| 30 | * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
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| 31 | * Note that url encoding for arguments is not the same as html encoding for
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| 32 | * presentation. -d decodes an url-encoded argument while -e encodes in html
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| 33 | * for page display.
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| 34 | *
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| 35 | * httpd.conf has the following format:
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| 36 | *
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| 37 | * H:/serverroot # define the server root. It will override -h
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| 38 | * A:172.20. # Allow address from 172.20.0.0/16
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| 39 | * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
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| 40 | * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
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| 41 | * A:127.0.0.1 # Allow local loopback connections
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| 42 | * D:* # Deny from other IP connections
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| 43 | * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
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| 44 | * I:index.html # Show index.html when a directory is requested
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| 45 | *
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| 46 | * P:/url:[http://]hostname[:port]/new/path
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| 47 | * # When /urlXXXXXX is requested, reverse proxy
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| 48 | * # it to http://hostname[:port]/new/pathXXXXXX
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| 49 | *
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| 50 | * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
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| 51 | * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
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| 52 | * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
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| 53 | * .au:audio/basic # additional mime type for audio.au files
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| 54 | * *.php:/path/php # run xxx.php through an interpreter
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| 55 | *
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| 56 | * A/D may be as a/d or allow/deny - only first char matters.
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| 57 | * Deny/Allow IP logic:
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| 58 | * - Default is to allow all (Allow all (A:*) is a no-op).
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| 59 | * - Deny rules take precedence over allow rules.
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| 60 | * - "Deny all" rule (D:*) is applied last.
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| 61 | *
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| 62 | * Example:
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| 63 | * 1. Allow only specified addresses
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| 64 | * A:172.20 # Allow any address that begins with 172.20.
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| 65 | * A:10.10. # Allow any address that begins with 10.10.
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| 66 | * A:127.0.0.1 # Allow local loopback connections
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| 67 | * D:* # Deny from other IP connections
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| 68 | *
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| 69 | * 2. Only deny specified addresses
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| 70 | * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
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| 71 | * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
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| 72 | * A:* # (optional line added for clarity)
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| 73 | *
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| 74 | * If a sub directory contains a config file it is parsed and merged with
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| 75 | * any existing settings as if it was appended to the original configuration.
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| 76 | *
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| 77 | * subdir paths are relative to the containing subdir and thus cannot
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| 78 | * affect the parent rules.
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| 79 | *
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| 80 | * Note that since the sub dir is parsed in the forked thread servicing the
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| 81 | * subdir http request, any merge is discarded when the process exits. As a
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| 82 | * result, the subdir settings only have a lifetime of a single request.
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| 83 | *
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| 84 | * Custom error pages can contain an absolute path or be relative to
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| 85 | * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
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| 86 | * page can only be defined in the root configuration file and are not taken
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| 87 | * into account in local (directories) config files.
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| 88 | *
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| 89 | * If -c is not set, an attempt will be made to open the default
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| 90 | * root configuration file. If -c is set and the file is not found, the
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| 91 | * server exits with an error.
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| 92 | *
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| 93 | */
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| 94 | /* TODO: use TCP_CORK, parse_config() */
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| 95 |
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| 96 | #include "libbb.h"
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| 97 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
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| 98 | # include <sys/sendfile.h>
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| 99 | #endif
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| 100 | /* amount of buffering in a pipe */
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| 101 | #ifndef PIPE_BUF
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| 102 | # define PIPE_BUF 4096
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| 103 | #endif
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| 104 |
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| 105 | #define DEBUG 0
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| 106 |
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| 107 | #define IOBUF_SIZE 8192
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| 108 | #if PIPE_BUF >= IOBUF_SIZE
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| 109 | # error "PIPE_BUF >= IOBUF_SIZE"
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| 110 | #endif
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| 111 |
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| 112 | #define HEADER_READ_TIMEOUT 60
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| 113 |
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| 114 | static const char DEFAULT_PATH_HTTPD_CONF[] ALIGN1 = "/etc";
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| 115 | static const char HTTPD_CONF[] ALIGN1 = "httpd.conf";
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| 116 | static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
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| 117 | static const char index_html[] ALIGN1 = "index.html";
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| 118 |
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| 119 | typedef struct has_next_ptr {
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| 120 | struct has_next_ptr *next;
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| 121 | } has_next_ptr;
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| 122 |
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| 123 | /* Must have "next" as a first member */
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| 124 | typedef struct Htaccess {
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| 125 | struct Htaccess *next;
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| 126 | char *after_colon;
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| 127 | char before_colon[1]; /* really bigger, must be last */
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| 128 | } Htaccess;
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| 129 |
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| 130 | /* Must have "next" as a first member */
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| 131 | typedef struct Htaccess_IP {
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| 132 | struct Htaccess_IP *next;
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| 133 | unsigned ip;
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| 134 | unsigned mask;
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| 135 | int allow_deny;
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| 136 | } Htaccess_IP;
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| 137 |
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| 138 | /* Must have "next" as a first member */
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| 139 | typedef struct Htaccess_Proxy {
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| 140 | struct Htaccess_Proxy *next;
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| 141 | char *url_from;
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| 142 | char *host_port;
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| 143 | char *url_to;
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| 144 | } Htaccess_Proxy;
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| 145 |
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| 146 | enum {
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| 147 | HTTP_OK = 200,
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| 148 | HTTP_PARTIAL_CONTENT = 206,
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| 149 | HTTP_MOVED_TEMPORARILY = 302,
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| 150 | HTTP_BAD_REQUEST = 400, /* malformed syntax */
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| 151 | HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
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| 152 | HTTP_NOT_FOUND = 404,
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| 153 | HTTP_FORBIDDEN = 403,
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| 154 | HTTP_REQUEST_TIMEOUT = 408,
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| 155 | HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
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| 156 | HTTP_INTERNAL_SERVER_ERROR = 500,
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| 157 | HTTP_CONTINUE = 100,
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| 158 | #if 0 /* future use */
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| 159 | HTTP_SWITCHING_PROTOCOLS = 101,
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| 160 | HTTP_CREATED = 201,
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| 161 | HTTP_ACCEPTED = 202,
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| 162 | HTTP_NON_AUTHORITATIVE_INFO = 203,
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| 163 | HTTP_NO_CONTENT = 204,
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| 164 | HTTP_MULTIPLE_CHOICES = 300,
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| 165 | HTTP_MOVED_PERMANENTLY = 301,
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| 166 | HTTP_NOT_MODIFIED = 304,
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| 167 | HTTP_PAYMENT_REQUIRED = 402,
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| 168 | HTTP_BAD_GATEWAY = 502,
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| 169 | HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
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| 170 | #endif
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| 171 | };
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| 172 |
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| 173 | static const uint16_t http_response_type[] ALIGN2 = {
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| 174 | HTTP_OK,
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| 175 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 176 | HTTP_PARTIAL_CONTENT,
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| 177 | #endif
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| 178 | HTTP_MOVED_TEMPORARILY,
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| 179 | HTTP_REQUEST_TIMEOUT,
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| 180 | HTTP_NOT_IMPLEMENTED,
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| 181 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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| 182 | HTTP_UNAUTHORIZED,
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| 183 | #endif
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| 184 | HTTP_NOT_FOUND,
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| 185 | HTTP_BAD_REQUEST,
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| 186 | HTTP_FORBIDDEN,
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| 187 | HTTP_INTERNAL_SERVER_ERROR,
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| 188 | #if 0 /* not implemented */
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| 189 | HTTP_CREATED,
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| 190 | HTTP_ACCEPTED,
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| 191 | HTTP_NO_CONTENT,
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| 192 | HTTP_MULTIPLE_CHOICES,
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| 193 | HTTP_MOVED_PERMANENTLY,
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| 194 | HTTP_NOT_MODIFIED,
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| 195 | HTTP_BAD_GATEWAY,
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| 196 | HTTP_SERVICE_UNAVAILABLE,
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| 197 | #endif
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| 198 | };
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| 199 |
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| 200 | static const struct {
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| 201 | const char *name;
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| 202 | const char *info;
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| 203 | } http_response[ARRAY_SIZE(http_response_type)] = {
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| 204 | { "OK", NULL },
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| 205 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 206 | { "Partial Content", NULL },
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| 207 | #endif
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| 208 | { "Found", NULL },
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| 209 | { "Request Timeout", "No request appeared within 60 seconds" },
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| 210 | { "Not Implemented", "The requested method is not recognized" },
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| 211 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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| 212 | { "Unauthorized", "" },
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| 213 | #endif
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| 214 | { "Not Found", "The requested URL was not found" },
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| 215 | { "Bad Request", "Unsupported method" },
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| 216 | { "Forbidden", "" },
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| 217 | { "Internal Server Error", "Internal Server Error" },
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| 218 | #if 0 /* not implemented */
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| 219 | { "Created" },
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| 220 | { "Accepted" },
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| 221 | { "No Content" },
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| 222 | { "Multiple Choices" },
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| 223 | { "Moved Permanently" },
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| 224 | { "Not Modified" },
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| 225 | { "Bad Gateway", "" },
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| 226 | { "Service Unavailable", "" },
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| 227 | #endif
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| 228 | };
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| 229 |
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| 230 | struct globals {
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| 231 | int verbose; /* must be int (used by getopt32) */
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| 232 | smallint flg_deny_all;
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| 233 |
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| 234 | unsigned rmt_ip; /* used for IP-based allow/deny rules */
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| 235 | time_t last_mod;
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| 236 | char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
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| 237 | const char *bind_addr_or_port;
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| 238 |
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| 239 | const char *g_query;
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| 240 | const char *opt_c_configFile;
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| 241 | const char *home_httpd;
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| 242 | const char *index_page;
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| 243 |
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| 244 | const char *found_mime_type;
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| 245 | const char *found_moved_temporarily;
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| 246 | Htaccess_IP *ip_a_d; /* config allow/deny lines */
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| 247 |
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| 248 | IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
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| 249 | IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
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| 250 | IF_FEATURE_HTTPD_CGI(char *referer;)
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| 251 | IF_FEATURE_HTTPD_CGI(char *user_agent;)
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| 252 | IF_FEATURE_HTTPD_CGI(char *host;)
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| 253 | IF_FEATURE_HTTPD_CGI(char *http_accept;)
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| 254 | IF_FEATURE_HTTPD_CGI(char *http_accept_language;)
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| 255 |
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| 256 | off_t file_size; /* -1 - unknown */
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| 257 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 258 | off_t range_start;
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| 259 | off_t range_end;
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| 260 | off_t range_len;
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| 261 | #endif
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| 262 |
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| 263 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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| 264 | Htaccess *g_auth; /* config user:password lines */
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| 265 | #endif
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| 266 | Htaccess *mime_a; /* config mime types */
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| 267 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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| 268 | Htaccess *script_i; /* config script interpreters */
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| 269 | #endif
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| 270 | char *iobuf; /* [IOBUF_SIZE] */
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| 271 | #define hdr_buf bb_common_bufsiz1
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| 272 | char *hdr_ptr;
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| 273 | int hdr_cnt;
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| 274 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
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| 275 | const char *http_error_page[ARRAY_SIZE(http_response_type)];
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| 276 | #endif
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| 277 | #if ENABLE_FEATURE_HTTPD_PROXY
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| 278 | Htaccess_Proxy *proxy;
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| 279 | #endif
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| 280 | #if ENABLE_FEATURE_HTTPD_GZIP
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| 281 | /* client can handle gzip / we are going to send gzip */
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| 282 | smallint content_gzip;
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| 283 | #endif
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| 284 | };
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| 285 | #define G (*ptr_to_globals)
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| 286 | #define verbose (G.verbose )
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| 287 | #define flg_deny_all (G.flg_deny_all )
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| 288 | #define rmt_ip (G.rmt_ip )
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| 289 | #define bind_addr_or_port (G.bind_addr_or_port)
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| 290 | #define g_query (G.g_query )
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| 291 | #define opt_c_configFile (G.opt_c_configFile )
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| 292 | #define home_httpd (G.home_httpd )
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| 293 | #define index_page (G.index_page )
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| 294 | #define found_mime_type (G.found_mime_type )
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| 295 | #define found_moved_temporarily (G.found_moved_temporarily)
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| 296 | #define last_mod (G.last_mod )
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| 297 | #define ip_a_d (G.ip_a_d )
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| 298 | #define g_realm (G.g_realm )
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| 299 | #define remoteuser (G.remoteuser )
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| 300 | #define referer (G.referer )
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| 301 | #define user_agent (G.user_agent )
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| 302 | #define host (G.host )
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| 303 | #define http_accept (G.http_accept )
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| 304 | #define http_accept_language (G.http_accept_language)
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| 305 | #define file_size (G.file_size )
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| 306 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 307 | #define range_start (G.range_start )
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| 308 | #define range_end (G.range_end )
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| 309 | #define range_len (G.range_len )
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| 310 | #else
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| 311 | enum {
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| 312 | range_start = 0,
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| 313 | range_end = MAXINT(off_t) - 1,
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| 314 | range_len = MAXINT(off_t),
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| 315 | };
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| 316 | #endif
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| 317 | #define rmt_ip_str (G.rmt_ip_str )
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| 318 | #define g_auth (G.g_auth )
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| 319 | #define mime_a (G.mime_a )
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| 320 | #define script_i (G.script_i )
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| 321 | #define iobuf (G.iobuf )
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| 322 | #define hdr_ptr (G.hdr_ptr )
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| 323 | #define hdr_cnt (G.hdr_cnt )
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| 324 | #define http_error_page (G.http_error_page )
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| 325 | #define proxy (G.proxy )
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| 326 | #if ENABLE_FEATURE_HTTPD_GZIP
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| 327 | # define content_gzip (G.content_gzip )
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| 328 | #else
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| 329 | # define content_gzip 0
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| 330 | #endif
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| 331 | #define INIT_G() do { \
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| 332 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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| 333 | IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
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| 334 | bind_addr_or_port = "80"; \
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| 335 | index_page = index_html; \
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| 336 | file_size = -1; \
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| 337 | } while (0)
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| 338 |
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| 339 |
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| 340 | #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
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| 341 |
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| 342 | /* Prototypes */
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| 343 | enum {
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| 344 | SEND_HEADERS = (1 << 0),
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| 345 | SEND_BODY = (1 << 1),
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| 346 | SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
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| 347 | };
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| 348 | static void send_file_and_exit(const char *url, int what) NORETURN;
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| 349 |
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| 350 | static void free_llist(has_next_ptr **pptr)
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| 351 | {
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| 352 | has_next_ptr *cur = *pptr;
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| 353 | while (cur) {
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| 354 | has_next_ptr *t = cur;
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| 355 | cur = cur->next;
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| 356 | free(t);
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| 357 | }
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| 358 | *pptr = NULL;
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| 359 | }
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| 360 |
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| 361 | static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
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| 362 | {
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| 363 | free_llist((has_next_ptr**)pptr);
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| 364 | }
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| 365 |
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| 366 | static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
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| 367 | {
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| 368 | free_llist((has_next_ptr**)pptr);
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| 369 | }
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| 370 |
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| 371 | /* Returns presumed mask width in bits or < 0 on error.
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| 372 | * Updates strp, stores IP at provided pointer */
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| 373 | static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
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| 374 | {
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| 375 | const char *p = *strp;
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| 376 | int auto_mask = 8;
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| 377 | unsigned ip = 0;
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| 378 | int j;
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| 379 |
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| 380 | if (*p == '/')
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| 381 | return -auto_mask;
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| 382 |
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| 383 | for (j = 0; j < 4; j++) {
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| 384 | unsigned octet;
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| 385 |
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| 386 | if ((*p < '0' || *p > '9') && *p != '/' && *p)
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| 387 | return -auto_mask;
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| 388 | octet = 0;
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| 389 | while (*p >= '0' && *p <= '9') {
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| 390 | octet *= 10;
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| 391 | octet += *p - '0';
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| 392 | if (octet > 255)
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| 393 | return -auto_mask;
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| 394 | p++;
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| 395 | }
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| 396 | if (*p == '.')
|
---|
| 397 | p++;
|
---|
| 398 | if (*p != '/' && *p)
|
---|
| 399 | auto_mask += 8;
|
---|
| 400 | ip = (ip << 8) | octet;
|
---|
| 401 | }
|
---|
| 402 | if (*p) {
|
---|
| 403 | if (*p != endc)
|
---|
| 404 | return -auto_mask;
|
---|
| 405 | p++;
|
---|
| 406 | if (*p == '\0')
|
---|
| 407 | return -auto_mask;
|
---|
| 408 | }
|
---|
| 409 | *ipp = ip;
|
---|
| 410 | *strp = p;
|
---|
| 411 | return auto_mask;
|
---|
| 412 | }
|
---|
| 413 |
|
---|
| 414 | /* Returns 0 on success. Stores IP and mask at provided pointers */
|
---|
| 415 | static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
|
---|
| 416 | {
|
---|
| 417 | int i;
|
---|
| 418 | unsigned mask;
|
---|
| 419 | char *p;
|
---|
| 420 |
|
---|
| 421 | i = scan_ip(&str, ipp, '/');
|
---|
| 422 | if (i < 0)
|
---|
| 423 | return i;
|
---|
| 424 |
|
---|
| 425 | if (*str) {
|
---|
| 426 | /* there is /xxx after dotted-IP address */
|
---|
| 427 | i = bb_strtou(str, &p, 10);
|
---|
| 428 | if (*p == '.') {
|
---|
| 429 | /* 'xxx' itself is dotted-IP mask, parse it */
|
---|
| 430 | /* (return 0 (success) only if it has N.N.N.N form) */
|
---|
| 431 | return scan_ip(&str, maskp, '\0') - 32;
|
---|
| 432 | }
|
---|
| 433 | if (*p)
|
---|
| 434 | return -1;
|
---|
| 435 | }
|
---|
| 436 |
|
---|
| 437 | if (i > 32)
|
---|
| 438 | return -1;
|
---|
| 439 |
|
---|
| 440 | if (sizeof(unsigned) == 4 && i == 32) {
|
---|
| 441 | /* mask >>= 32 below may not work */
|
---|
| 442 | mask = 0;
|
---|
| 443 | } else {
|
---|
| 444 | mask = 0xffffffff;
|
---|
| 445 | mask >>= i;
|
---|
| 446 | }
|
---|
| 447 | /* i == 0 -> *maskp = 0x00000000
|
---|
| 448 | * i == 1 -> *maskp = 0x80000000
|
---|
| 449 | * i == 4 -> *maskp = 0xf0000000
|
---|
| 450 | * i == 31 -> *maskp = 0xfffffffe
|
---|
| 451 | * i == 32 -> *maskp = 0xffffffff */
|
---|
| 452 | *maskp = (uint32_t)(~mask);
|
---|
| 453 | return 0;
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | /*
|
---|
| 457 | * Parse configuration file into in-memory linked list.
|
---|
| 458 | *
|
---|
| 459 | * Any previous IP rules are discarded.
|
---|
| 460 | * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
|
---|
| 461 | * are also discarded. That is, previous settings are retained if flag is
|
---|
| 462 | * SUBDIR_PARSE.
|
---|
| 463 | * Error pages are only parsed on the main config file.
|
---|
| 464 | *
|
---|
| 465 | * path Path where to look for httpd.conf (without filename).
|
---|
| 466 | * flag Type of the parse request.
|
---|
| 467 | */
|
---|
| 468 | /* flag param: */
|
---|
| 469 | enum {
|
---|
| 470 | FIRST_PARSE = 0, /* path will be "/etc" */
|
---|
| 471 | SIGNALED_PARSE = 1, /* path will be "/etc" */
|
---|
| 472 | SUBDIR_PARSE = 2, /* path will be derived from URL */
|
---|
| 473 | };
|
---|
| 474 | static void parse_conf(const char *path, int flag)
|
---|
| 475 | {
|
---|
| 476 | /* internally used extra flag state */
|
---|
| 477 | enum { TRY_CURDIR_PARSE = 3 };
|
---|
| 478 |
|
---|
| 479 | FILE *f;
|
---|
| 480 | const char *filename;
|
---|
| 481 | char buf[160];
|
---|
| 482 |
|
---|
| 483 | /* discard old rules */
|
---|
| 484 | free_Htaccess_IP_list(&ip_a_d);
|
---|
| 485 | flg_deny_all = 0;
|
---|
| 486 | /* retain previous auth and mime config only for subdir parse */
|
---|
| 487 | if (flag != SUBDIR_PARSE) {
|
---|
| 488 | free_Htaccess_list(&mime_a);
|
---|
| 489 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 490 | free_Htaccess_list(&g_auth);
|
---|
| 491 | #endif
|
---|
| 492 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 493 | free_Htaccess_list(&script_i);
|
---|
| 494 | #endif
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | filename = opt_c_configFile;
|
---|
| 498 | if (flag == SUBDIR_PARSE || filename == NULL) {
|
---|
| 499 | filename = alloca(strlen(path) + sizeof(HTTPD_CONF) + 2);
|
---|
| 500 | sprintf((char *)filename, "%s/%s", path, HTTPD_CONF);
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | while ((f = fopen_for_read(filename)) == NULL) {
|
---|
| 504 | if (flag >= SUBDIR_PARSE) { /* SUBDIR or TRY_CURDIR */
|
---|
| 505 | /* config file not found, no changes to config */
|
---|
| 506 | return;
|
---|
| 507 | }
|
---|
| 508 | if (flag == FIRST_PARSE) {
|
---|
| 509 | /* -c CONFFILE given, but CONFFILE doesn't exist? */
|
---|
| 510 | if (opt_c_configFile)
|
---|
| 511 | bb_simple_perror_msg_and_die(opt_c_configFile);
|
---|
| 512 | /* else: no -c, thus we looked at /etc/httpd.conf,
|
---|
| 513 | * and it's not there. try ./httpd.conf: */
|
---|
| 514 | }
|
---|
| 515 | flag = TRY_CURDIR_PARSE;
|
---|
| 516 | filename = HTTPD_CONF;
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 520 | /* in "/file:user:pass" lines, we prepend path in subdirs */
|
---|
| 521 | if (flag != SUBDIR_PARSE)
|
---|
| 522 | path = "";
|
---|
| 523 | #endif
|
---|
| 524 | /* The lines can be:
|
---|
| 525 | *
|
---|
| 526 | * I:default_index_file
|
---|
| 527 | * H:http_home
|
---|
| 528 | * [AD]:IP[/mask] # allow/deny, * for wildcard
|
---|
| 529 | * Ennn:error.html # error page for status nnn
|
---|
| 530 | * P:/url:[http://]hostname[:port]/new/path # reverse proxy
|
---|
| 531 | * .ext:mime/type # mime type
|
---|
| 532 | * *.php:/path/php # run xxx.php through an interpreter
|
---|
| 533 | * /file:user:pass # username and password
|
---|
| 534 | */
|
---|
| 535 | while (fgets(buf, sizeof(buf), f) != NULL) {
|
---|
| 536 | unsigned strlen_buf;
|
---|
| 537 | unsigned char ch;
|
---|
| 538 | char *after_colon;
|
---|
| 539 |
|
---|
| 540 | { /* remove all whitespace, and # comments */
|
---|
| 541 | char *p, *p0;
|
---|
| 542 |
|
---|
| 543 | p0 = buf;
|
---|
| 544 | /* skip non-whitespace beginning. Often the whole line
|
---|
| 545 | * is non-whitespace. We want this case to work fast,
|
---|
| 546 | * without needless copying, therefore we don't merge
|
---|
| 547 | * this operation into next while loop. */
|
---|
| 548 | while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
|
---|
| 549 | && ch != ' ' && ch != '\t'
|
---|
| 550 | ) {
|
---|
| 551 | p0++;
|
---|
| 552 | }
|
---|
| 553 | p = p0;
|
---|
| 554 | /* if we enter this loop, we have some whitespace.
|
---|
| 555 | * discard it */
|
---|
| 556 | while (ch != '\0' && ch != '\n' && ch != '#') {
|
---|
| 557 | if (ch != ' ' && ch != '\t') {
|
---|
| 558 | *p++ = ch;
|
---|
| 559 | }
|
---|
| 560 | ch = *++p0;
|
---|
| 561 | }
|
---|
| 562 | *p = '\0';
|
---|
| 563 | strlen_buf = p - buf;
|
---|
| 564 | if (strlen_buf == 0)
|
---|
| 565 | continue; /* empty line */
|
---|
| 566 | }
|
---|
| 567 |
|
---|
| 568 | after_colon = strchr(buf, ':');
|
---|
| 569 | /* strange line? */
|
---|
| 570 | if (after_colon == NULL || *++after_colon == '\0')
|
---|
| 571 | goto config_error;
|
---|
| 572 |
|
---|
| 573 | ch = (buf[0] & ~0x20); /* toupper if it's a letter */
|
---|
| 574 |
|
---|
| 575 | if (ch == 'I') {
|
---|
| 576 | if (index_page != index_html)
|
---|
| 577 | free((char*)index_page);
|
---|
| 578 | index_page = xstrdup(after_colon);
|
---|
| 579 | continue;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | /* do not allow jumping around using H in subdir's configs */
|
---|
| 583 | if (flag == FIRST_PARSE && ch == 'H') {
|
---|
| 584 | home_httpd = xstrdup(after_colon);
|
---|
| 585 | xchdir(home_httpd);
|
---|
| 586 | continue;
|
---|
| 587 | }
|
---|
| 588 |
|
---|
| 589 | if (ch == 'A' || ch == 'D') {
|
---|
| 590 | Htaccess_IP *pip;
|
---|
| 591 |
|
---|
| 592 | if (*after_colon == '*') {
|
---|
| 593 | if (ch == 'D') {
|
---|
| 594 | /* memorize "deny all" */
|
---|
| 595 | flg_deny_all = 1;
|
---|
| 596 | }
|
---|
| 597 | /* skip assumed "A:*", it is a default anyway */
|
---|
| 598 | continue;
|
---|
| 599 | }
|
---|
| 600 | /* store "allow/deny IP/mask" line */
|
---|
| 601 | pip = xzalloc(sizeof(*pip));
|
---|
| 602 | if (scan_ip_mask(after_colon, &pip->ip, &pip->mask)) {
|
---|
| 603 | /* IP{/mask} syntax error detected, protect all */
|
---|
| 604 | ch = 'D';
|
---|
| 605 | pip->mask = 0;
|
---|
| 606 | }
|
---|
| 607 | pip->allow_deny = ch;
|
---|
| 608 | if (ch == 'D') {
|
---|
| 609 | /* Deny:from_IP - prepend */
|
---|
| 610 | pip->next = ip_a_d;
|
---|
| 611 | ip_a_d = pip;
|
---|
| 612 | } else {
|
---|
| 613 | /* A:from_IP - append (thus all D's precedes A's) */
|
---|
| 614 | Htaccess_IP *prev_IP = ip_a_d;
|
---|
| 615 | if (prev_IP == NULL) {
|
---|
| 616 | ip_a_d = pip;
|
---|
| 617 | } else {
|
---|
| 618 | while (prev_IP->next)
|
---|
| 619 | prev_IP = prev_IP->next;
|
---|
| 620 | prev_IP->next = pip;
|
---|
| 621 | }
|
---|
| 622 | }
|
---|
| 623 | continue;
|
---|
| 624 | }
|
---|
| 625 |
|
---|
| 626 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
| 627 | if (flag == FIRST_PARSE && ch == 'E') {
|
---|
| 628 | unsigned i;
|
---|
| 629 | int status = atoi(buf + 1); /* error status code */
|
---|
| 630 |
|
---|
| 631 | if (status < HTTP_CONTINUE) {
|
---|
| 632 | goto config_error;
|
---|
| 633 | }
|
---|
| 634 | /* then error page; find matching status */
|
---|
| 635 | for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
---|
| 636 | if (http_response_type[i] == status) {
|
---|
| 637 | /* We chdir to home_httpd, thus no need to
|
---|
| 638 | * concat_path_file(home_httpd, after_colon)
|
---|
| 639 | * here */
|
---|
| 640 | http_error_page[i] = xstrdup(after_colon);
|
---|
| 641 | break;
|
---|
| 642 | }
|
---|
| 643 | }
|
---|
| 644 | continue;
|
---|
| 645 | }
|
---|
| 646 | #endif
|
---|
| 647 |
|
---|
| 648 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 649 | if (flag == FIRST_PARSE && ch == 'P') {
|
---|
| 650 | /* P:/url:[http://]hostname[:port]/new/path */
|
---|
| 651 | char *url_from, *host_port, *url_to;
|
---|
| 652 | Htaccess_Proxy *proxy_entry;
|
---|
| 653 |
|
---|
| 654 | url_from = after_colon;
|
---|
| 655 | host_port = strchr(after_colon, ':');
|
---|
| 656 | if (host_port == NULL) {
|
---|
| 657 | goto config_error;
|
---|
| 658 | }
|
---|
| 659 | *host_port++ = '\0';
|
---|
| 660 | if (strncmp(host_port, "http://", 7) == 0)
|
---|
| 661 | host_port += 7;
|
---|
| 662 | if (*host_port == '\0') {
|
---|
| 663 | goto config_error;
|
---|
| 664 | }
|
---|
| 665 | url_to = strchr(host_port, '/');
|
---|
| 666 | if (url_to == NULL) {
|
---|
| 667 | goto config_error;
|
---|
| 668 | }
|
---|
| 669 | *url_to = '\0';
|
---|
| 670 | proxy_entry = xzalloc(sizeof(*proxy_entry));
|
---|
| 671 | proxy_entry->url_from = xstrdup(url_from);
|
---|
| 672 | proxy_entry->host_port = xstrdup(host_port);
|
---|
| 673 | *url_to = '/';
|
---|
| 674 | proxy_entry->url_to = xstrdup(url_to);
|
---|
| 675 | proxy_entry->next = proxy;
|
---|
| 676 | proxy = proxy_entry;
|
---|
| 677 | continue;
|
---|
| 678 | }
|
---|
| 679 | #endif
|
---|
| 680 | /* the rest of directives are non-alphabetic,
|
---|
| 681 | * must avoid using "toupper'ed" ch */
|
---|
| 682 | ch = buf[0];
|
---|
| 683 |
|
---|
| 684 | if (ch == '.' /* ".ext:mime/type" */
|
---|
| 685 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 686 | || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
|
---|
| 687 | #endif
|
---|
| 688 | ) {
|
---|
| 689 | char *p;
|
---|
| 690 | Htaccess *cur;
|
---|
| 691 |
|
---|
| 692 | cur = xzalloc(sizeof(*cur) /* includes space for NUL */ + strlen_buf);
|
---|
| 693 | strcpy(cur->before_colon, buf);
|
---|
| 694 | p = cur->before_colon + (after_colon - buf);
|
---|
| 695 | p[-1] = '\0';
|
---|
| 696 | cur->after_colon = p;
|
---|
| 697 | if (ch == '.') {
|
---|
| 698 | /* .mime line: prepend to mime_a list */
|
---|
| 699 | cur->next = mime_a;
|
---|
| 700 | mime_a = cur;
|
---|
| 701 | }
|
---|
| 702 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 703 | else {
|
---|
| 704 | /* script interpreter line: prepend to script_i list */
|
---|
| 705 | cur->next = script_i;
|
---|
| 706 | script_i = cur;
|
---|
| 707 | }
|
---|
| 708 | #endif
|
---|
| 709 | continue;
|
---|
| 710 | }
|
---|
| 711 |
|
---|
| 712 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 713 | if (ch == '/') { /* "/file:user:pass" */
|
---|
| 714 | char *p;
|
---|
| 715 | Htaccess *cur;
|
---|
| 716 | unsigned file_len;
|
---|
| 717 |
|
---|
| 718 | /* note: path is "" unless we are in SUBDIR parse,
|
---|
| 719 | * otherwise it does NOT start with "/" */
|
---|
| 720 | cur = xzalloc(sizeof(*cur) /* includes space for NUL */
|
---|
| 721 | + 1 + strlen(path)
|
---|
| 722 | + strlen_buf
|
---|
| 723 | );
|
---|
| 724 | /* form "/path/file" */
|
---|
| 725 | sprintf(cur->before_colon, "/%s%.*s",
|
---|
| 726 | path,
|
---|
| 727 | (int) (after_colon - buf - 1), /* includes "/", but not ":" */
|
---|
| 728 | buf);
|
---|
| 729 | /* canonicalize it */
|
---|
| 730 | p = bb_simplify_abs_path_inplace(cur->before_colon);
|
---|
| 731 | file_len = p - cur->before_colon;
|
---|
| 732 | /* add "user:pass" after NUL */
|
---|
| 733 | strcpy(++p, after_colon);
|
---|
| 734 | cur->after_colon = p;
|
---|
| 735 |
|
---|
| 736 | /* insert cur into g_auth */
|
---|
| 737 | /* g_auth is sorted by decreased filename length */
|
---|
| 738 | {
|
---|
| 739 | Htaccess *auth, **authp;
|
---|
| 740 |
|
---|
| 741 | authp = &g_auth;
|
---|
| 742 | while ((auth = *authp) != NULL) {
|
---|
| 743 | if (file_len >= strlen(auth->before_colon)) {
|
---|
| 744 | /* insert cur before auth */
|
---|
| 745 | cur->next = auth;
|
---|
| 746 | break;
|
---|
| 747 | }
|
---|
| 748 | authp = &auth->next;
|
---|
| 749 | }
|
---|
| 750 | *authp = cur;
|
---|
| 751 | }
|
---|
| 752 | continue;
|
---|
| 753 | }
|
---|
| 754 | #endif /* BASIC_AUTH */
|
---|
| 755 |
|
---|
| 756 | /* the line is not recognized */
|
---|
| 757 | config_error:
|
---|
| 758 | bb_error_msg("config error '%s' in '%s'", buf, filename);
|
---|
| 759 | } /* while (fgets) */
|
---|
| 760 |
|
---|
| 761 | fclose(f);
|
---|
| 762 | }
|
---|
| 763 |
|
---|
| 764 | #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
---|
| 765 | /*
|
---|
| 766 | * Given a string, html-encode special characters.
|
---|
| 767 | * This is used for the -e command line option to provide an easy way
|
---|
| 768 | * for scripts to encode result data without confusing browsers. The
|
---|
| 769 | * returned string pointer is memory allocated by malloc().
|
---|
| 770 | *
|
---|
| 771 | * Returns a pointer to the encoded string (malloced).
|
---|
| 772 | */
|
---|
| 773 | static char *encodeString(const char *string)
|
---|
| 774 | {
|
---|
| 775 | /* take the simple route and encode everything */
|
---|
| 776 | /* could possibly scan once to get length. */
|
---|
| 777 | int len = strlen(string);
|
---|
| 778 | char *out = xmalloc(len * 6 + 1);
|
---|
| 779 | char *p = out;
|
---|
| 780 | char ch;
|
---|
| 781 |
|
---|
| 782 | while ((ch = *string++) != '\0') {
|
---|
| 783 | /* very simple check for what to encode */
|
---|
| 784 | if (isalnum(ch))
|
---|
| 785 | *p++ = ch;
|
---|
| 786 | else
|
---|
| 787 | p += sprintf(p, "&#%d;", (unsigned char) ch);
|
---|
| 788 | }
|
---|
| 789 | *p = '\0';
|
---|
| 790 | return out;
|
---|
| 791 | }
|
---|
| 792 | #endif
|
---|
| 793 |
|
---|
| 794 | /*
|
---|
| 795 | * Given a URL encoded string, convert it to plain ascii.
|
---|
| 796 | * Since decoding always makes strings smaller, the decode is done in-place.
|
---|
| 797 | * Thus, callers should xstrdup() the argument if they do not want the
|
---|
| 798 | * argument modified. The return is the original pointer, allowing this
|
---|
| 799 | * function to be easily used as arguments to other functions.
|
---|
| 800 | *
|
---|
| 801 | * string The first string to decode.
|
---|
| 802 | * option_d 1 if called for httpd -d
|
---|
| 803 | *
|
---|
| 804 | * Returns a pointer to the decoded string (same as input).
|
---|
| 805 | */
|
---|
| 806 | static unsigned hex_to_bin(unsigned char c)
|
---|
| 807 | {
|
---|
| 808 | unsigned v;
|
---|
| 809 |
|
---|
| 810 | v = c - '0';
|
---|
| 811 | if (v <= 9)
|
---|
| 812 | return v;
|
---|
| 813 | /* c | 0x20: letters to lower case, non-letters
|
---|
| 814 | * to (potentially different) non-letters */
|
---|
| 815 | v = (unsigned)(c | 0x20) - 'a';
|
---|
| 816 | if (v <= 5)
|
---|
| 817 | return v + 10;
|
---|
| 818 | return ~0;
|
---|
| 819 | /* For testing:
|
---|
| 820 | void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
|
---|
| 821 | int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
|
---|
| 822 | t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
|
---|
| 823 | */
|
---|
| 824 | }
|
---|
| 825 | static char *decodeString(char *orig, int option_d)
|
---|
| 826 | {
|
---|
| 827 | /* note that decoded string is always shorter than original */
|
---|
| 828 | char *string = orig;
|
---|
| 829 | char *ptr = string;
|
---|
| 830 | char c;
|
---|
| 831 |
|
---|
| 832 | while ((c = *ptr++) != '\0') {
|
---|
| 833 | unsigned v;
|
---|
| 834 |
|
---|
| 835 | if (option_d && c == '+') {
|
---|
| 836 | *string++ = ' ';
|
---|
| 837 | continue;
|
---|
| 838 | }
|
---|
| 839 | if (c != '%') {
|
---|
| 840 | *string++ = c;
|
---|
| 841 | continue;
|
---|
| 842 | }
|
---|
| 843 | v = hex_to_bin(ptr[0]);
|
---|
| 844 | if (v > 15) {
|
---|
| 845 | bad_hex:
|
---|
| 846 | if (!option_d)
|
---|
| 847 | return NULL;
|
---|
| 848 | *string++ = '%';
|
---|
| 849 | continue;
|
---|
| 850 | }
|
---|
| 851 | v = (v * 16) | hex_to_bin(ptr[1]);
|
---|
| 852 | if (v > 255)
|
---|
| 853 | goto bad_hex;
|
---|
| 854 | if (!option_d && (v == '/' || v == '\0')) {
|
---|
| 855 | /* caller takes it as indication of invalid
|
---|
| 856 | * (dangerous wrt exploits) chars */
|
---|
| 857 | return orig + 1;
|
---|
| 858 | }
|
---|
| 859 | *string++ = v;
|
---|
| 860 | ptr += 2;
|
---|
| 861 | }
|
---|
| 862 | *string = '\0';
|
---|
| 863 | return orig;
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 867 | /*
|
---|
| 868 | * Decode a base64 data stream as per rfc1521.
|
---|
| 869 | * Note that the rfc states that non base64 chars are to be ignored.
|
---|
| 870 | * Since the decode always results in a shorter size than the input,
|
---|
| 871 | * it is OK to pass the input arg as an output arg.
|
---|
| 872 | * Parameter: a pointer to a base64 encoded string.
|
---|
| 873 | * Decoded data is stored in-place.
|
---|
| 874 | */
|
---|
| 875 | static void decodeBase64(char *Data)
|
---|
| 876 | {
|
---|
| 877 | const unsigned char *in = (const unsigned char *)Data;
|
---|
| 878 | /* The decoded size will be at most 3/4 the size of the encoded */
|
---|
| 879 | unsigned ch = 0;
|
---|
| 880 | int i = 0;
|
---|
| 881 |
|
---|
| 882 | while (*in) {
|
---|
| 883 | int t = *in++;
|
---|
| 884 |
|
---|
| 885 | if (t >= '0' && t <= '9')
|
---|
| 886 | t = t - '0' + 52;
|
---|
| 887 | else if (t >= 'A' && t <= 'Z')
|
---|
| 888 | t = t - 'A';
|
---|
| 889 | else if (t >= 'a' && t <= 'z')
|
---|
| 890 | t = t - 'a' + 26;
|
---|
| 891 | else if (t == '+')
|
---|
| 892 | t = 62;
|
---|
| 893 | else if (t == '/')
|
---|
| 894 | t = 63;
|
---|
| 895 | else if (t == '=')
|
---|
| 896 | t = 0;
|
---|
| 897 | else
|
---|
| 898 | continue;
|
---|
| 899 |
|
---|
| 900 | ch = (ch << 6) | t;
|
---|
| 901 | i++;
|
---|
| 902 | if (i == 4) {
|
---|
| 903 | *Data++ = (char) (ch >> 16);
|
---|
| 904 | *Data++ = (char) (ch >> 8);
|
---|
| 905 | *Data++ = (char) ch;
|
---|
| 906 | i = 0;
|
---|
| 907 | }
|
---|
| 908 | }
|
---|
| 909 | *Data = '\0';
|
---|
| 910 | }
|
---|
| 911 | #endif
|
---|
| 912 |
|
---|
| 913 | /*
|
---|
| 914 | * Create a listen server socket on the designated port.
|
---|
| 915 | */
|
---|
| 916 | static int openServer(void)
|
---|
| 917 | {
|
---|
| 918 | unsigned n = bb_strtou(bind_addr_or_port, NULL, 10);
|
---|
| 919 | if (!errno && n && n <= 0xffff)
|
---|
| 920 | n = create_and_bind_stream_or_die(NULL, n);
|
---|
| 921 | else
|
---|
| 922 | n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
|
---|
| 923 | xlisten(n, 9);
|
---|
| 924 | return n;
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 | /*
|
---|
| 928 | * Log the connection closure and exit.
|
---|
| 929 | */
|
---|
| 930 | static void log_and_exit(void) NORETURN;
|
---|
| 931 | static void log_and_exit(void)
|
---|
| 932 | {
|
---|
| 933 | /* Paranoia. IE said to be buggy. It may send some extra data
|
---|
| 934 | * or be confused by us just exiting without SHUT_WR. Oh well. */
|
---|
| 935 | shutdown(1, SHUT_WR);
|
---|
| 936 | /* Why??
|
---|
| 937 | (this also messes up stdin when user runs httpd -i from terminal)
|
---|
| 938 | ndelay_on(0);
|
---|
| 939 | while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
|
---|
| 940 | continue;
|
---|
| 941 | */
|
---|
| 942 |
|
---|
| 943 | if (verbose > 2)
|
---|
| 944 | bb_error_msg("closed");
|
---|
| 945 | _exit(xfunc_error_retval);
|
---|
| 946 | }
|
---|
| 947 |
|
---|
| 948 | /*
|
---|
| 949 | * Create and send HTTP response headers.
|
---|
| 950 | * The arguments are combined and sent as one write operation. Note that
|
---|
| 951 | * IE will puke big-time if the headers are not sent in one packet and the
|
---|
| 952 | * second packet is delayed for any reason.
|
---|
| 953 | * responseNum - the result code to send.
|
---|
| 954 | */
|
---|
| 955 | static void send_headers(int responseNum)
|
---|
| 956 | {
|
---|
| 957 | static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
|
---|
| 958 |
|
---|
| 959 | const char *responseString = "";
|
---|
| 960 | const char *infoString = NULL;
|
---|
| 961 | const char *mime_type;
|
---|
| 962 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
| 963 | const char *error_page = NULL;
|
---|
| 964 | #endif
|
---|
| 965 | unsigned i;
|
---|
| 966 | time_t timer = time(NULL);
|
---|
| 967 | char tmp_str[80];
|
---|
| 968 | int len;
|
---|
| 969 |
|
---|
| 970 | for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
---|
| 971 | if (http_response_type[i] == responseNum) {
|
---|
| 972 | responseString = http_response[i].name;
|
---|
| 973 | infoString = http_response[i].info;
|
---|
| 974 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
| 975 | error_page = http_error_page[i];
|
---|
| 976 | #endif
|
---|
| 977 | break;
|
---|
| 978 | }
|
---|
| 979 | }
|
---|
| 980 | /* error message is HTML */
|
---|
| 981 | mime_type = responseNum == HTTP_OK ?
|
---|
| 982 | found_mime_type : "text/html";
|
---|
| 983 |
|
---|
| 984 | if (verbose)
|
---|
| 985 | bb_error_msg("response:%u", responseNum);
|
---|
| 986 |
|
---|
| 987 | /* emit the current date */
|
---|
| 988 | strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
|
---|
| 989 | len = sprintf(iobuf,
|
---|
| 990 | "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
|
---|
| 991 | "Date: %s\r\nConnection: close\r\n",
|
---|
| 992 | responseNum, responseString, mime_type, tmp_str);
|
---|
| 993 |
|
---|
| 994 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 995 | if (responseNum == HTTP_UNAUTHORIZED) {
|
---|
| 996 | len += sprintf(iobuf + len,
|
---|
| 997 | "WWW-Authenticate: Basic realm=\"%s\"\r\n",
|
---|
| 998 | g_realm);
|
---|
| 999 | }
|
---|
| 1000 | #endif
|
---|
| 1001 | if (responseNum == HTTP_MOVED_TEMPORARILY) {
|
---|
| 1002 | len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
|
---|
| 1003 | found_moved_temporarily,
|
---|
| 1004 | (g_query ? "?" : ""),
|
---|
| 1005 | (g_query ? g_query : ""));
|
---|
| 1006 | }
|
---|
| 1007 |
|
---|
| 1008 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
| 1009 | if (error_page && access(error_page, R_OK) == 0) {
|
---|
| 1010 | strcat(iobuf, "\r\n");
|
---|
| 1011 | len += 2;
|
---|
| 1012 |
|
---|
| 1013 | if (DEBUG)
|
---|
| 1014 | fprintf(stderr, "headers: '%s'\n", iobuf);
|
---|
| 1015 | full_write(STDOUT_FILENO, iobuf, len);
|
---|
| 1016 | if (DEBUG)
|
---|
| 1017 | fprintf(stderr, "writing error page: '%s'\n", error_page);
|
---|
| 1018 | return send_file_and_exit(error_page, SEND_BODY);
|
---|
| 1019 | }
|
---|
| 1020 | #endif
|
---|
| 1021 |
|
---|
| 1022 | if (file_size != -1) { /* file */
|
---|
| 1023 | strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
|
---|
| 1024 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 1025 | if (responseNum == HTTP_PARTIAL_CONTENT) {
|
---|
| 1026 | len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
|
---|
| 1027 | range_start,
|
---|
| 1028 | range_end,
|
---|
| 1029 | file_size);
|
---|
| 1030 | file_size = range_end - range_start + 1;
|
---|
| 1031 | }
|
---|
| 1032 | #endif
|
---|
| 1033 | len += sprintf(iobuf + len,
|
---|
| 1034 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 1035 | "Accept-Ranges: bytes\r\n"
|
---|
| 1036 | #endif
|
---|
| 1037 | "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
|
---|
| 1038 | tmp_str,
|
---|
| 1039 | content_gzip ? "Transfer-length:" : "Content-length:",
|
---|
| 1040 | file_size
|
---|
| 1041 | );
|
---|
| 1042 | }
|
---|
| 1043 |
|
---|
| 1044 | if (content_gzip)
|
---|
| 1045 | len += sprintf(iobuf + len, "Content-Encoding: gzip\r\n");
|
---|
| 1046 |
|
---|
| 1047 | iobuf[len++] = '\r';
|
---|
| 1048 | iobuf[len++] = '\n';
|
---|
| 1049 | if (infoString) {
|
---|
| 1050 | len += sprintf(iobuf + len,
|
---|
| 1051 | "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
|
---|
| 1052 | "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
|
---|
| 1053 | responseNum, responseString,
|
---|
| 1054 | responseNum, responseString, infoString);
|
---|
| 1055 | }
|
---|
| 1056 | if (DEBUG)
|
---|
| 1057 | fprintf(stderr, "headers: '%s'\n", iobuf);
|
---|
| 1058 | if (full_write(STDOUT_FILENO, iobuf, len) != len) {
|
---|
| 1059 | if (verbose > 1)
|
---|
| 1060 | bb_perror_msg("error");
|
---|
| 1061 | log_and_exit();
|
---|
| 1062 | }
|
---|
| 1063 | }
|
---|
| 1064 |
|
---|
| 1065 | static void send_headers_and_exit(int responseNum) NORETURN;
|
---|
| 1066 | static void send_headers_and_exit(int responseNum)
|
---|
| 1067 | {
|
---|
| 1068 | send_headers(responseNum);
|
---|
| 1069 | log_and_exit();
|
---|
| 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | /*
|
---|
| 1073 | * Read from the socket until '\n' or EOF. '\r' chars are removed.
|
---|
| 1074 | * '\n' is replaced with NUL.
|
---|
| 1075 | * Return number of characters read or 0 if nothing is read
|
---|
| 1076 | * ('\r' and '\n' are not counted).
|
---|
| 1077 | * Data is returned in iobuf.
|
---|
| 1078 | */
|
---|
| 1079 | static int get_line(void)
|
---|
| 1080 | {
|
---|
| 1081 | int count = 0;
|
---|
| 1082 | char c;
|
---|
| 1083 |
|
---|
| 1084 | alarm(HEADER_READ_TIMEOUT);
|
---|
| 1085 | while (1) {
|
---|
| 1086 | if (hdr_cnt <= 0) {
|
---|
| 1087 | hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
|
---|
| 1088 | if (hdr_cnt <= 0)
|
---|
| 1089 | break;
|
---|
| 1090 | hdr_ptr = hdr_buf;
|
---|
| 1091 | }
|
---|
| 1092 | iobuf[count] = c = *hdr_ptr++;
|
---|
| 1093 | hdr_cnt--;
|
---|
| 1094 |
|
---|
| 1095 | if (c == '\r')
|
---|
| 1096 | continue;
|
---|
| 1097 | if (c == '\n') {
|
---|
| 1098 | iobuf[count] = '\0';
|
---|
| 1099 | break;
|
---|
| 1100 | }
|
---|
| 1101 | if (count < (IOBUF_SIZE - 1)) /* check overflow */
|
---|
| 1102 | count++;
|
---|
| 1103 | }
|
---|
| 1104 | return count;
|
---|
| 1105 | }
|
---|
| 1106 |
|
---|
| 1107 | #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1108 |
|
---|
| 1109 | /* gcc 4.2.1 fares better with NOINLINE */
|
---|
| 1110 | static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) NORETURN;
|
---|
| 1111 | static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
|
---|
| 1112 | {
|
---|
| 1113 | enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
|
---|
| 1114 | struct pollfd pfd[3];
|
---|
| 1115 | int out_cnt; /* we buffer a bit of initial CGI output */
|
---|
| 1116 | int count;
|
---|
| 1117 |
|
---|
| 1118 | /* iobuf is used for CGI -> network data,
|
---|
| 1119 | * hdr_buf is for network -> CGI data (POSTDATA) */
|
---|
| 1120 |
|
---|
| 1121 | /* If CGI dies, we still want to correctly finish reading its output
|
---|
| 1122 | * and send it to the peer. So please no SIGPIPEs! */
|
---|
| 1123 | signal(SIGPIPE, SIG_IGN);
|
---|
| 1124 |
|
---|
| 1125 | // We inconsistently handle a case when more POSTDATA from network
|
---|
| 1126 | // is coming than we expected. We may give *some part* of that
|
---|
| 1127 | // extra data to CGI.
|
---|
| 1128 |
|
---|
| 1129 | //if (hdr_cnt > post_len) {
|
---|
| 1130 | // /* We got more POSTDATA from network than we expected */
|
---|
| 1131 | // hdr_cnt = post_len;
|
---|
| 1132 | //}
|
---|
| 1133 | post_len -= hdr_cnt;
|
---|
| 1134 | /* post_len - number of POST bytes not yet read from network */
|
---|
| 1135 |
|
---|
| 1136 | /* NB: breaking out of this loop jumps to log_and_exit() */
|
---|
| 1137 | out_cnt = 0;
|
---|
| 1138 | while (1) {
|
---|
| 1139 | memset(pfd, 0, sizeof(pfd));
|
---|
| 1140 |
|
---|
| 1141 | pfd[FROM_CGI].fd = fromCgi_rd;
|
---|
| 1142 | pfd[FROM_CGI].events = POLLIN;
|
---|
| 1143 |
|
---|
| 1144 | if (toCgi_wr) {
|
---|
| 1145 | pfd[TO_CGI].fd = toCgi_wr;
|
---|
| 1146 | if (hdr_cnt > 0) {
|
---|
| 1147 | pfd[TO_CGI].events = POLLOUT;
|
---|
| 1148 | } else if (post_len > 0) {
|
---|
| 1149 | pfd[0].events = POLLIN;
|
---|
| 1150 | } else {
|
---|
| 1151 | /* post_len <= 0 && hdr_cnt <= 0:
|
---|
| 1152 | * no more POST data to CGI,
|
---|
| 1153 | * let CGI see EOF on CGI's stdin */
|
---|
| 1154 | if (toCgi_wr != fromCgi_rd)
|
---|
| 1155 | close(toCgi_wr);
|
---|
| 1156 | toCgi_wr = 0;
|
---|
| 1157 | }
|
---|
| 1158 | }
|
---|
| 1159 |
|
---|
| 1160 | /* Now wait on the set of sockets */
|
---|
| 1161 | count = safe_poll(pfd, toCgi_wr ? TO_CGI+1 : FROM_CGI+1, -1);
|
---|
| 1162 | if (count <= 0) {
|
---|
| 1163 | #if 0
|
---|
| 1164 | if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
|
---|
| 1165 | /* Weird. CGI didn't exit and no fd's
|
---|
| 1166 | * are ready, yet poll returned?! */
|
---|
| 1167 | continue;
|
---|
| 1168 | }
|
---|
| 1169 | if (DEBUG && WIFEXITED(status))
|
---|
| 1170 | bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
|
---|
| 1171 | if (DEBUG && WIFSIGNALED(status))
|
---|
| 1172 | bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
|
---|
| 1173 | #endif
|
---|
| 1174 | break;
|
---|
| 1175 | }
|
---|
| 1176 |
|
---|
| 1177 | if (pfd[TO_CGI].revents) {
|
---|
| 1178 | /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
|
---|
| 1179 | /* Have data from peer and can write to CGI */
|
---|
| 1180 | count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
|
---|
| 1181 | /* Doesn't happen, we dont use nonblocking IO here
|
---|
| 1182 | *if (count < 0 && errno == EAGAIN) {
|
---|
| 1183 | * ...
|
---|
| 1184 | *} else */
|
---|
| 1185 | if (count > 0) {
|
---|
| 1186 | hdr_ptr += count;
|
---|
| 1187 | hdr_cnt -= count;
|
---|
| 1188 | } else {
|
---|
| 1189 | /* EOF/broken pipe to CGI, stop piping POST data */
|
---|
| 1190 | hdr_cnt = post_len = 0;
|
---|
| 1191 | }
|
---|
| 1192 | }
|
---|
| 1193 |
|
---|
| 1194 | if (pfd[0].revents) {
|
---|
| 1195 | /* post_len > 0 && hdr_cnt == 0 here */
|
---|
| 1196 | /* We expect data, prev data portion is eaten by CGI
|
---|
| 1197 | * and there *is* data to read from the peer
|
---|
| 1198 | * (POSTDATA) */
|
---|
| 1199 | //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
|
---|
| 1200 | //count = safe_read(STDIN_FILENO, hdr_buf, count);
|
---|
| 1201 | count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
|
---|
| 1202 | if (count > 0) {
|
---|
| 1203 | hdr_cnt = count;
|
---|
| 1204 | hdr_ptr = hdr_buf;
|
---|
| 1205 | post_len -= count;
|
---|
| 1206 | } else {
|
---|
| 1207 | /* no more POST data can be read */
|
---|
| 1208 | post_len = 0;
|
---|
| 1209 | }
|
---|
| 1210 | }
|
---|
| 1211 |
|
---|
| 1212 | if (pfd[FROM_CGI].revents) {
|
---|
| 1213 | /* There is something to read from CGI */
|
---|
| 1214 | char *rbuf = iobuf;
|
---|
| 1215 |
|
---|
| 1216 | /* Are we still buffering CGI output? */
|
---|
| 1217 | if (out_cnt >= 0) {
|
---|
| 1218 | /* HTTP_200[] has single "\r\n" at the end.
|
---|
| 1219 | * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
|
---|
| 1220 | * CGI scripts MUST send their own header terminated by
|
---|
| 1221 | * empty line, then data. That's why we have only one
|
---|
| 1222 | * <cr><lf> pair here. We will output "200 OK" line
|
---|
| 1223 | * if needed, but CGI still has to provide blank line
|
---|
| 1224 | * between header and body */
|
---|
| 1225 |
|
---|
| 1226 | /* Must use safe_read, not full_read, because
|
---|
| 1227 | * CGI may output a few first bytes and then wait
|
---|
| 1228 | * for POSTDATA without closing stdout.
|
---|
| 1229 | * With full_read we may wait here forever. */
|
---|
| 1230 | count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
|
---|
| 1231 | if (count <= 0) {
|
---|
| 1232 | /* eof (or error) and there was no "HTTP",
|
---|
| 1233 | * so write it, then write received data */
|
---|
| 1234 | if (out_cnt) {
|
---|
| 1235 | full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
|
---|
| 1236 | full_write(STDOUT_FILENO, rbuf, out_cnt);
|
---|
| 1237 | }
|
---|
| 1238 | break; /* CGI stdout is closed, exiting */
|
---|
| 1239 | }
|
---|
| 1240 | out_cnt += count;
|
---|
| 1241 | count = 0;
|
---|
| 1242 | /* "Status" header format is: "Status: 302 Redirected\r\n" */
|
---|
| 1243 | if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
|
---|
| 1244 | /* send "HTTP/1.0 " */
|
---|
| 1245 | if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
|
---|
| 1246 | break;
|
---|
| 1247 | rbuf += 8; /* skip "Status: " */
|
---|
| 1248 | count = out_cnt - 8;
|
---|
| 1249 | out_cnt = -1; /* buffering off */
|
---|
| 1250 | } else if (out_cnt >= 4) {
|
---|
| 1251 | /* Did CGI add "HTTP"? */
|
---|
| 1252 | if (memcmp(rbuf, HTTP_200, 4) != 0) {
|
---|
| 1253 | /* there is no "HTTP", do it ourself */
|
---|
| 1254 | if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
|
---|
| 1255 | break;
|
---|
| 1256 | }
|
---|
| 1257 | /* Commented out:
|
---|
| 1258 | if (!strstr(rbuf, "ontent-")) {
|
---|
| 1259 | full_write(s, "Content-type: text/plain\r\n\r\n", 28);
|
---|
| 1260 | }
|
---|
| 1261 | * Counter-example of valid CGI without Content-type:
|
---|
| 1262 | * echo -en "HTTP/1.0 302 Found\r\n"
|
---|
| 1263 | * echo -en "Location: http://www.busybox.net\r\n"
|
---|
| 1264 | * echo -en "\r\n"
|
---|
| 1265 | */
|
---|
| 1266 | count = out_cnt;
|
---|
| 1267 | out_cnt = -1; /* buffering off */
|
---|
| 1268 | }
|
---|
| 1269 | } else {
|
---|
| 1270 | count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
|
---|
| 1271 | if (count <= 0)
|
---|
| 1272 | break; /* eof (or error) */
|
---|
| 1273 | }
|
---|
| 1274 | if (full_write(STDOUT_FILENO, rbuf, count) != count)
|
---|
| 1275 | break;
|
---|
| 1276 | if (DEBUG)
|
---|
| 1277 | fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
|
---|
| 1278 | } /* if (pfd[FROM_CGI].revents) */
|
---|
| 1279 | } /* while (1) */
|
---|
| 1280 | log_and_exit();
|
---|
| 1281 | }
|
---|
| 1282 | #endif
|
---|
| 1283 |
|
---|
| 1284 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 1285 |
|
---|
| 1286 | static void setenv1(const char *name, const char *value)
|
---|
| 1287 | {
|
---|
| 1288 | setenv(name, value ? value : "", 1);
|
---|
| 1289 | }
|
---|
| 1290 |
|
---|
| 1291 | /*
|
---|
| 1292 | * Spawn CGI script, forward CGI's stdin/out <=> network
|
---|
| 1293 | *
|
---|
| 1294 | * Environment variables are set up and the script is invoked with pipes
|
---|
| 1295 | * for stdin/stdout. If a POST is being done the script is fed the POST
|
---|
| 1296 | * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
|
---|
| 1297 | *
|
---|
| 1298 | * Parameters:
|
---|
| 1299 | * const char *url The requested URL (with leading /).
|
---|
| 1300 | * int post_len Length of the POST body.
|
---|
| 1301 | * const char *cookie For set HTTP_COOKIE.
|
---|
| 1302 | * const char *content_type For set CONTENT_TYPE.
|
---|
| 1303 | */
|
---|
| 1304 | static void send_cgi_and_exit(
|
---|
| 1305 | const char *url,
|
---|
| 1306 | const char *request,
|
---|
| 1307 | int post_len,
|
---|
| 1308 | const char *cookie,
|
---|
| 1309 | const char *content_type) NORETURN;
|
---|
| 1310 | static void send_cgi_and_exit(
|
---|
| 1311 | const char *url,
|
---|
| 1312 | const char *request,
|
---|
| 1313 | int post_len,
|
---|
| 1314 | const char *cookie,
|
---|
| 1315 | const char *content_type)
|
---|
| 1316 | {
|
---|
| 1317 | struct fd_pair fromCgi; /* CGI -> httpd pipe */
|
---|
| 1318 | struct fd_pair toCgi; /* httpd -> CGI pipe */
|
---|
| 1319 | char *script;
|
---|
| 1320 | int pid;
|
---|
| 1321 |
|
---|
| 1322 | /* Make a copy. NB: caller guarantees:
|
---|
| 1323 | * url[0] == '/', url[1] != '/' */
|
---|
| 1324 | url = xstrdup(url);
|
---|
| 1325 |
|
---|
| 1326 | /*
|
---|
| 1327 | * We are mucking with environment _first_ and then vfork/exec,
|
---|
| 1328 | * this allows us to use vfork safely. Parent doesn't care about
|
---|
| 1329 | * these environment changes anyway.
|
---|
| 1330 | */
|
---|
| 1331 |
|
---|
| 1332 | /* Check for [dirs/]script.cgi/PATH_INFO */
|
---|
| 1333 | script = (char*)url;
|
---|
| 1334 | while ((script = strchr(script + 1, '/')) != NULL) {
|
---|
| 1335 | *script = '\0';
|
---|
| 1336 | if (!is_directory(url + 1, 1, NULL)) {
|
---|
| 1337 | /* not directory, found script.cgi/PATH_INFO */
|
---|
| 1338 | *script = '/';
|
---|
| 1339 | break;
|
---|
| 1340 | }
|
---|
| 1341 | *script = '/'; /* is directory, find next '/' */
|
---|
| 1342 | }
|
---|
| 1343 | setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
|
---|
| 1344 | setenv1("REQUEST_METHOD", request);
|
---|
| 1345 | if (g_query) {
|
---|
| 1346 | putenv(xasprintf("%s=%s?%s", "REQUEST_URI", url, g_query));
|
---|
| 1347 | } else {
|
---|
| 1348 | setenv1("REQUEST_URI", url);
|
---|
| 1349 | }
|
---|
| 1350 | if (script != NULL)
|
---|
| 1351 | *script = '\0'; /* cut off /PATH_INFO */
|
---|
| 1352 |
|
---|
| 1353 | /* SCRIPT_FILENAME is required by PHP in CGI mode */
|
---|
| 1354 | if (home_httpd[0] == '/') {
|
---|
| 1355 | char *fullpath = concat_path_file(home_httpd, url);
|
---|
| 1356 | setenv1("SCRIPT_FILENAME", fullpath);
|
---|
| 1357 | }
|
---|
| 1358 | /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
|
---|
| 1359 | setenv1("SCRIPT_NAME", url);
|
---|
| 1360 | /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
|
---|
| 1361 | * QUERY_STRING: The information which follows the ? in the URL
|
---|
| 1362 | * which referenced this script. This is the query information.
|
---|
| 1363 | * It should not be decoded in any fashion. This variable
|
---|
| 1364 | * should always be set when there is query information,
|
---|
| 1365 | * regardless of command line decoding. */
|
---|
| 1366 | /* (Older versions of bbox seem to do some decoding) */
|
---|
| 1367 | setenv1("QUERY_STRING", g_query);
|
---|
| 1368 | putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
|
---|
| 1369 | putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
|
---|
| 1370 | putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
|
---|
| 1371 | /* Having _separate_ variables for IP and port defeats
|
---|
| 1372 | * the purpose of having socket abstraction. Which "port"
|
---|
| 1373 | * are you using on Unix domain socket?
|
---|
| 1374 | * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
|
---|
| 1375 | * Oh well... */
|
---|
| 1376 | {
|
---|
| 1377 | char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
|
---|
| 1378 | char *cp = strrchr(p, ':');
|
---|
| 1379 | if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
|
---|
| 1380 | cp = NULL;
|
---|
| 1381 | if (cp) *cp = '\0'; /* delete :PORT */
|
---|
| 1382 | setenv1("REMOTE_ADDR", p);
|
---|
| 1383 | if (cp) {
|
---|
| 1384 | *cp = ':';
|
---|
| 1385 | #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
|
---|
| 1386 | setenv1("REMOTE_PORT", cp + 1);
|
---|
| 1387 | #endif
|
---|
| 1388 | }
|
---|
| 1389 | }
|
---|
| 1390 | setenv1("HTTP_USER_AGENT", user_agent);
|
---|
| 1391 | if (http_accept)
|
---|
| 1392 | setenv1("HTTP_ACCEPT", http_accept);
|
---|
| 1393 | if (http_accept_language)
|
---|
| 1394 | setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language);
|
---|
| 1395 | if (post_len)
|
---|
| 1396 | putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
|
---|
| 1397 | if (cookie)
|
---|
| 1398 | setenv1("HTTP_COOKIE", cookie);
|
---|
| 1399 | if (content_type)
|
---|
| 1400 | setenv1("CONTENT_TYPE", content_type);
|
---|
| 1401 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 1402 | if (remoteuser) {
|
---|
| 1403 | setenv1("REMOTE_USER", remoteuser);
|
---|
| 1404 | putenv((char*)"AUTH_TYPE=Basic");
|
---|
| 1405 | }
|
---|
| 1406 | #endif
|
---|
| 1407 | if (referer)
|
---|
| 1408 | setenv1("HTTP_REFERER", referer);
|
---|
| 1409 | setenv1("HTTP_HOST", host); /* set to "" if NULL */
|
---|
| 1410 | /* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
|
---|
| 1411 | * just run "env SERVER_NAME=xyz httpd ..." instead */
|
---|
| 1412 |
|
---|
| 1413 | xpiped_pair(fromCgi);
|
---|
| 1414 | xpiped_pair(toCgi);
|
---|
| 1415 |
|
---|
| 1416 | pid = vfork();
|
---|
| 1417 | if (pid < 0) {
|
---|
| 1418 | /* TODO: log perror? */
|
---|
| 1419 | log_and_exit();
|
---|
| 1420 | }
|
---|
| 1421 |
|
---|
| 1422 | if (!pid) {
|
---|
| 1423 | /* Child process */
|
---|
| 1424 | char *argv[3];
|
---|
| 1425 |
|
---|
| 1426 | xfunc_error_retval = 242;
|
---|
| 1427 |
|
---|
| 1428 | /* NB: close _first_, then move fds! */
|
---|
| 1429 | close(toCgi.wr);
|
---|
| 1430 | close(fromCgi.rd);
|
---|
| 1431 | xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
|
---|
| 1432 | xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
|
---|
| 1433 | /* User seeing stderr output can be a security problem.
|
---|
| 1434 | * If CGI really wants that, it can always do dup itself. */
|
---|
| 1435 | /* dup2(1, 2); */
|
---|
| 1436 |
|
---|
| 1437 | /* Chdiring to script's dir */
|
---|
| 1438 | script = strrchr(url, '/');
|
---|
| 1439 | if (script != url) { /* paranoia */
|
---|
| 1440 | *script = '\0';
|
---|
| 1441 | if (chdir(url + 1) != 0) {
|
---|
| 1442 | bb_perror_msg("chdir(%s)", url + 1);
|
---|
| 1443 | goto error_execing_cgi;
|
---|
| 1444 | }
|
---|
| 1445 | // not needed: *script = '/';
|
---|
| 1446 | }
|
---|
| 1447 | script++;
|
---|
| 1448 |
|
---|
| 1449 | /* set argv[0] to name without path */
|
---|
| 1450 | argv[0] = script;
|
---|
| 1451 | argv[1] = NULL;
|
---|
| 1452 |
|
---|
| 1453 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 1454 | {
|
---|
| 1455 | char *suffix = strrchr(script, '.');
|
---|
| 1456 |
|
---|
| 1457 | if (suffix) {
|
---|
| 1458 | Htaccess *cur;
|
---|
| 1459 | for (cur = script_i; cur; cur = cur->next) {
|
---|
| 1460 | if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
---|
| 1461 | /* found interpreter name */
|
---|
| 1462 | argv[0] = cur->after_colon;
|
---|
| 1463 | argv[1] = script;
|
---|
| 1464 | argv[2] = NULL;
|
---|
| 1465 | break;
|
---|
| 1466 | }
|
---|
| 1467 | }
|
---|
| 1468 | }
|
---|
| 1469 | }
|
---|
| 1470 | #endif
|
---|
| 1471 | /* restore default signal dispositions for CGI process */
|
---|
| 1472 | bb_signals(0
|
---|
| 1473 | | (1 << SIGCHLD)
|
---|
| 1474 | | (1 << SIGPIPE)
|
---|
| 1475 | | (1 << SIGHUP)
|
---|
| 1476 | , SIG_DFL);
|
---|
| 1477 |
|
---|
| 1478 | /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
|
---|
| 1479 | * without any dir components and will only match a file
|
---|
| 1480 | * in the current directory */
|
---|
| 1481 | execv(argv[0], argv);
|
---|
| 1482 | if (verbose)
|
---|
| 1483 | bb_perror_msg("can't execute '%s'", argv[0]);
|
---|
| 1484 | error_execing_cgi:
|
---|
| 1485 | /* send to stdout
|
---|
| 1486 | * (we are CGI here, our stdout is pumped to the net) */
|
---|
| 1487 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
| 1488 | } /* end child */
|
---|
| 1489 |
|
---|
| 1490 | /* Parent process */
|
---|
| 1491 |
|
---|
| 1492 | /* Restore variables possibly changed by child */
|
---|
| 1493 | xfunc_error_retval = 0;
|
---|
| 1494 |
|
---|
| 1495 | /* Pump data */
|
---|
| 1496 | close(fromCgi.wr);
|
---|
| 1497 | close(toCgi.rd);
|
---|
| 1498 | cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
|
---|
| 1499 | }
|
---|
| 1500 |
|
---|
| 1501 | #endif /* FEATURE_HTTPD_CGI */
|
---|
| 1502 |
|
---|
| 1503 | /*
|
---|
| 1504 | * Send a file response to a HTTP request, and exit
|
---|
| 1505 | *
|
---|
| 1506 | * Parameters:
|
---|
| 1507 | * const char *url The requested URL (with leading /).
|
---|
| 1508 | * what What to send (headers/body/both).
|
---|
| 1509 | */
|
---|
| 1510 | static NOINLINE void send_file_and_exit(const char *url, int what)
|
---|
| 1511 | {
|
---|
| 1512 | char *suffix;
|
---|
| 1513 | int fd;
|
---|
| 1514 | ssize_t count;
|
---|
| 1515 |
|
---|
| 1516 | if (content_gzip) {
|
---|
| 1517 | /* does <url>.gz exist? Then use it instead */
|
---|
| 1518 | char *gzurl = xasprintf("%s.gz", url);
|
---|
| 1519 | fd = open(gzurl, O_RDONLY);
|
---|
| 1520 | free(gzurl);
|
---|
| 1521 | if (fd != -1) {
|
---|
| 1522 | struct stat sb;
|
---|
| 1523 | fstat(fd, &sb);
|
---|
| 1524 | file_size = sb.st_size;
|
---|
| 1525 | last_mod = sb.st_mtime;
|
---|
| 1526 | } else {
|
---|
| 1527 | IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
|
---|
| 1528 | fd = open(url, O_RDONLY);
|
---|
| 1529 | }
|
---|
| 1530 | } else {
|
---|
| 1531 | fd = open(url, O_RDONLY);
|
---|
| 1532 | }
|
---|
| 1533 | if (fd < 0) {
|
---|
| 1534 | if (DEBUG)
|
---|
| 1535 | bb_perror_msg("can't open '%s'", url);
|
---|
| 1536 | /* Error pages are sent by using send_file_and_exit(SEND_BODY).
|
---|
| 1537 | * IOW: it is unsafe to call send_headers_and_exit
|
---|
| 1538 | * if what is SEND_BODY! Can recurse! */
|
---|
| 1539 | if (what != SEND_BODY)
|
---|
| 1540 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
| 1541 | log_and_exit();
|
---|
| 1542 | }
|
---|
| 1543 | /* If you want to know about EPIPE below
|
---|
| 1544 | * (happens if you abort downloads from local httpd): */
|
---|
| 1545 | signal(SIGPIPE, SIG_IGN);
|
---|
| 1546 |
|
---|
| 1547 | /* If not found, default is "application/octet-stream" */
|
---|
| 1548 | found_mime_type = "application/octet-stream";
|
---|
| 1549 | suffix = strrchr(url, '.');
|
---|
| 1550 | if (suffix) {
|
---|
| 1551 | static const char suffixTable[] ALIGN1 =
|
---|
| 1552 | /* Shorter suffix must be first:
|
---|
| 1553 | * ".html.htm" will fail for ".htm"
|
---|
| 1554 | */
|
---|
| 1555 | ".txt.h.c.cc.cpp\0" "text/plain\0"
|
---|
| 1556 | /* .htm line must be after .h line */
|
---|
| 1557 | ".htm.html\0" "text/html\0"
|
---|
| 1558 | ".jpg.jpeg\0" "image/jpeg\0"
|
---|
| 1559 | ".gif\0" "image/gif\0"
|
---|
| 1560 | ".png\0" "image/png\0"
|
---|
| 1561 | /* .css line must be after .c line */
|
---|
| 1562 | ".css\0" "text/css\0"
|
---|
| 1563 | ".wav\0" "audio/wav\0"
|
---|
| 1564 | ".avi\0" "video/x-msvideo\0"
|
---|
| 1565 | ".qt.mov\0" "video/quicktime\0"
|
---|
| 1566 | ".mpe.mpeg\0" "video/mpeg\0"
|
---|
| 1567 | ".mid.midi\0" "audio/midi\0"
|
---|
| 1568 | ".mp3\0" "audio/mpeg\0"
|
---|
| 1569 | #if 0 /* unpopular */
|
---|
| 1570 | ".au\0" "audio/basic\0"
|
---|
| 1571 | ".pac\0" "application/x-ns-proxy-autoconfig\0"
|
---|
| 1572 | ".vrml.wrl\0" "model/vrml\0"
|
---|
| 1573 | #endif
|
---|
| 1574 | /* compiler adds another "\0" here */
|
---|
| 1575 | ;
|
---|
| 1576 | Htaccess *cur;
|
---|
| 1577 |
|
---|
| 1578 | /* Examine built-in table */
|
---|
| 1579 | const char *table = suffixTable;
|
---|
| 1580 | const char *table_next;
|
---|
| 1581 | for (; *table; table = table_next) {
|
---|
| 1582 | const char *try_suffix;
|
---|
| 1583 | const char *mime_type;
|
---|
| 1584 | mime_type = table + strlen(table) + 1;
|
---|
| 1585 | table_next = mime_type + strlen(mime_type) + 1;
|
---|
| 1586 | try_suffix = strstr(table, suffix);
|
---|
| 1587 | if (!try_suffix)
|
---|
| 1588 | continue;
|
---|
| 1589 | try_suffix += strlen(suffix);
|
---|
| 1590 | if (*try_suffix == '\0' || *try_suffix == '.') {
|
---|
| 1591 | found_mime_type = mime_type;
|
---|
| 1592 | break;
|
---|
| 1593 | }
|
---|
| 1594 | /* Example: strstr(table, ".av") != NULL, but it
|
---|
| 1595 | * does not match ".avi" after all and we end up here.
|
---|
| 1596 | * The table is arranged so that in this case we know
|
---|
| 1597 | * that it can't match anything in the following lines,
|
---|
| 1598 | * and we stop the search: */
|
---|
| 1599 | break;
|
---|
| 1600 | }
|
---|
| 1601 | /* ...then user's table */
|
---|
| 1602 | for (cur = mime_a; cur; cur = cur->next) {
|
---|
| 1603 | if (strcmp(cur->before_colon, suffix) == 0) {
|
---|
| 1604 | found_mime_type = cur->after_colon;
|
---|
| 1605 | break;
|
---|
| 1606 | }
|
---|
| 1607 | }
|
---|
| 1608 | }
|
---|
| 1609 |
|
---|
| 1610 | if (DEBUG)
|
---|
| 1611 | bb_error_msg("sending file '%s' content-type: %s",
|
---|
| 1612 | url, found_mime_type);
|
---|
| 1613 |
|
---|
| 1614 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 1615 | if (what == SEND_BODY /* err pages and ranges don't mix */
|
---|
| 1616 | || content_gzip /* we are sending compressed page: can't do ranges */ ///why?
|
---|
| 1617 | ) {
|
---|
| 1618 | range_start = 0;
|
---|
| 1619 | }
|
---|
| 1620 | range_len = MAXINT(off_t);
|
---|
| 1621 | if (range_start) {
|
---|
| 1622 | if (!range_end) {
|
---|
| 1623 | range_end = file_size - 1;
|
---|
| 1624 | }
|
---|
| 1625 | if (range_end < range_start
|
---|
| 1626 | || lseek(fd, range_start, SEEK_SET) != range_start
|
---|
| 1627 | ) {
|
---|
| 1628 | lseek(fd, 0, SEEK_SET);
|
---|
| 1629 | range_start = 0;
|
---|
| 1630 | } else {
|
---|
| 1631 | range_len = range_end - range_start + 1;
|
---|
| 1632 | send_headers(HTTP_PARTIAL_CONTENT);
|
---|
| 1633 | what = SEND_BODY;
|
---|
| 1634 | }
|
---|
| 1635 | }
|
---|
| 1636 | #endif
|
---|
| 1637 | if (what & SEND_HEADERS)
|
---|
| 1638 | send_headers(HTTP_OK);
|
---|
| 1639 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
---|
| 1640 | {
|
---|
| 1641 | off_t offset = range_start;
|
---|
| 1642 | while (1) {
|
---|
| 1643 | /* sz is rounded down to 64k */
|
---|
| 1644 | ssize_t sz = MAXINT(ssize_t) - 0xffff;
|
---|
| 1645 | IF_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
|
---|
| 1646 | count = sendfile(STDOUT_FILENO, fd, &offset, sz);
|
---|
| 1647 | if (count < 0) {
|
---|
| 1648 | if (offset == range_start)
|
---|
| 1649 | break; /* fall back to read/write loop */
|
---|
| 1650 | goto fin;
|
---|
| 1651 | }
|
---|
| 1652 | IF_FEATURE_HTTPD_RANGES(range_len -= sz;)
|
---|
| 1653 | if (count == 0 || range_len == 0)
|
---|
| 1654 | log_and_exit();
|
---|
| 1655 | }
|
---|
| 1656 | }
|
---|
| 1657 | #endif
|
---|
| 1658 | while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
|
---|
| 1659 | ssize_t n;
|
---|
| 1660 | IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
|
---|
| 1661 | n = full_write(STDOUT_FILENO, iobuf, count);
|
---|
| 1662 | if (count != n)
|
---|
| 1663 | break;
|
---|
| 1664 | IF_FEATURE_HTTPD_RANGES(range_len -= count;)
|
---|
| 1665 | if (range_len == 0)
|
---|
| 1666 | break;
|
---|
| 1667 | }
|
---|
| 1668 | if (count < 0) {
|
---|
| 1669 | IF_FEATURE_HTTPD_USE_SENDFILE(fin:)
|
---|
| 1670 | if (verbose > 1)
|
---|
| 1671 | bb_perror_msg("error");
|
---|
| 1672 | }
|
---|
| 1673 | log_and_exit();
|
---|
| 1674 | }
|
---|
| 1675 |
|
---|
| 1676 | static int checkPermIP(void)
|
---|
| 1677 | {
|
---|
| 1678 | Htaccess_IP *cur;
|
---|
| 1679 |
|
---|
| 1680 | for (cur = ip_a_d; cur; cur = cur->next) {
|
---|
| 1681 | #if DEBUG
|
---|
| 1682 | fprintf(stderr,
|
---|
| 1683 | "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
|
---|
| 1684 | rmt_ip_str,
|
---|
| 1685 | (unsigned char)(cur->ip >> 24),
|
---|
| 1686 | (unsigned char)(cur->ip >> 16),
|
---|
| 1687 | (unsigned char)(cur->ip >> 8),
|
---|
| 1688 | (unsigned char)(cur->ip),
|
---|
| 1689 | (unsigned char)(cur->mask >> 24),
|
---|
| 1690 | (unsigned char)(cur->mask >> 16),
|
---|
| 1691 | (unsigned char)(cur->mask >> 8),
|
---|
| 1692 | (unsigned char)(cur->mask)
|
---|
| 1693 | );
|
---|
| 1694 | #endif
|
---|
| 1695 | if ((rmt_ip & cur->mask) == cur->ip)
|
---|
| 1696 | return (cur->allow_deny == 'A'); /* A -> 1 */
|
---|
| 1697 | }
|
---|
| 1698 |
|
---|
| 1699 | return !flg_deny_all; /* depends on whether we saw "D:*" */
|
---|
| 1700 | }
|
---|
| 1701 |
|
---|
| 1702 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 1703 | /*
|
---|
| 1704 | * Config file entries are of the form "/<path>:<user>:<passwd>".
|
---|
| 1705 | * If config file has no prefix match for path, access is allowed.
|
---|
| 1706 | *
|
---|
| 1707 | * path The file path
|
---|
| 1708 | * user_and_passwd "user:passwd" to validate
|
---|
| 1709 | *
|
---|
| 1710 | * Returns 1 if user_and_passwd is OK.
|
---|
| 1711 | */
|
---|
| 1712 | static int check_user_passwd(const char *path, const char *user_and_passwd)
|
---|
| 1713 | {
|
---|
| 1714 | Htaccess *cur;
|
---|
| 1715 | const char *prev = NULL;
|
---|
| 1716 |
|
---|
| 1717 | for (cur = g_auth; cur; cur = cur->next) {
|
---|
| 1718 | const char *dir_prefix;
|
---|
| 1719 | size_t len;
|
---|
| 1720 |
|
---|
| 1721 | dir_prefix = cur->before_colon;
|
---|
| 1722 |
|
---|
| 1723 | /* WHY? */
|
---|
| 1724 | /* If already saw a match, don't accept other different matches */
|
---|
| 1725 | if (prev && strcmp(prev, dir_prefix) != 0)
|
---|
| 1726 | continue;
|
---|
| 1727 |
|
---|
| 1728 | if (DEBUG)
|
---|
| 1729 | fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);
|
---|
| 1730 |
|
---|
| 1731 | /* If it's not a prefix match, continue searching */
|
---|
| 1732 | len = strlen(dir_prefix);
|
---|
| 1733 | if (len != 1 /* dir_prefix "/" matches all, don't need to check */
|
---|
| 1734 | && (strncmp(dir_prefix, path, len) != 0
|
---|
| 1735 | || (path[len] != '/' && path[len] != '\0'))
|
---|
| 1736 | ) {
|
---|
| 1737 | continue;
|
---|
| 1738 | }
|
---|
| 1739 |
|
---|
| 1740 | /* Path match found */
|
---|
| 1741 | prev = dir_prefix;
|
---|
| 1742 |
|
---|
| 1743 | if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
|
---|
| 1744 | char *md5_passwd;
|
---|
| 1745 |
|
---|
| 1746 | md5_passwd = strchr(cur->after_colon, ':');
|
---|
| 1747 | if (md5_passwd && md5_passwd[1] == '$' && md5_passwd[2] == '1'
|
---|
| 1748 | && md5_passwd[3] == '$' && md5_passwd[4]
|
---|
| 1749 | ) {
|
---|
| 1750 | char *encrypted;
|
---|
| 1751 | int r, user_len_p1;
|
---|
| 1752 |
|
---|
| 1753 | md5_passwd++;
|
---|
| 1754 | user_len_p1 = md5_passwd - cur->after_colon;
|
---|
| 1755 | /* comparing "user:" */
|
---|
| 1756 | if (strncmp(cur->after_colon, user_and_passwd, user_len_p1) != 0) {
|
---|
| 1757 | continue;
|
---|
| 1758 | }
|
---|
| 1759 |
|
---|
| 1760 | encrypted = pw_encrypt(
|
---|
| 1761 | user_and_passwd + user_len_p1 /* cleartext pwd from user */,
|
---|
| 1762 | md5_passwd /*salt */, 1 /* cleanup */);
|
---|
| 1763 | r = strcmp(encrypted, md5_passwd);
|
---|
| 1764 | free(encrypted);
|
---|
| 1765 | if (r == 0)
|
---|
| 1766 | goto set_remoteuser_var; /* Ok */
|
---|
| 1767 | continue;
|
---|
| 1768 | }
|
---|
| 1769 | }
|
---|
| 1770 |
|
---|
| 1771 | /* Comparing plaintext "user:pass" in one go */
|
---|
| 1772 | if (strcmp(cur->after_colon, user_and_passwd) == 0) {
|
---|
| 1773 | set_remoteuser_var:
|
---|
| 1774 | remoteuser = xstrndup(user_and_passwd,
|
---|
| 1775 | strchrnul(user_and_passwd, ':') - user_and_passwd);
|
---|
| 1776 | return 1; /* Ok */
|
---|
| 1777 | }
|
---|
| 1778 | } /* for */
|
---|
| 1779 |
|
---|
| 1780 | /* 0(bad) if prev is set: matches were found but passwd was wrong */
|
---|
| 1781 | return (prev == NULL);
|
---|
| 1782 | }
|
---|
| 1783 | #endif /* FEATURE_HTTPD_BASIC_AUTH */
|
---|
| 1784 |
|
---|
| 1785 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1786 | static Htaccess_Proxy *find_proxy_entry(const char *url)
|
---|
| 1787 | {
|
---|
| 1788 | Htaccess_Proxy *p;
|
---|
| 1789 | for (p = proxy; p; p = p->next) {
|
---|
| 1790 | if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
|
---|
| 1791 | return p;
|
---|
| 1792 | }
|
---|
| 1793 | return NULL;
|
---|
| 1794 | }
|
---|
| 1795 | #endif
|
---|
| 1796 |
|
---|
| 1797 | /*
|
---|
| 1798 | * Handle timeouts
|
---|
| 1799 | */
|
---|
| 1800 | static void send_REQUEST_TIMEOUT_and_exit(int sig) NORETURN;
|
---|
| 1801 | static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM)
|
---|
| 1802 | {
|
---|
| 1803 | send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
|
---|
| 1804 | }
|
---|
| 1805 |
|
---|
| 1806 | /*
|
---|
| 1807 | * Handle an incoming http request and exit.
|
---|
| 1808 | */
|
---|
| 1809 | static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) NORETURN;
|
---|
| 1810 | static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
|
---|
| 1811 | {
|
---|
| 1812 | static const char request_GET[] ALIGN1 = "GET";
|
---|
| 1813 | struct stat sb;
|
---|
| 1814 | char *urlcopy;
|
---|
| 1815 | char *urlp;
|
---|
| 1816 | char *tptr;
|
---|
| 1817 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 1818 | static const char request_HEAD[] ALIGN1 = "HEAD";
|
---|
| 1819 | const char *prequest;
|
---|
| 1820 | char *cookie = NULL;
|
---|
| 1821 | char *content_type = NULL;
|
---|
| 1822 | unsigned long length = 0;
|
---|
| 1823 | #elif ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1824 | #define prequest request_GET
|
---|
| 1825 | unsigned long length = 0;
|
---|
| 1826 | #endif
|
---|
| 1827 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 1828 | smallint authorized = -1;
|
---|
| 1829 | #endif
|
---|
| 1830 | smallint ip_allowed;
|
---|
| 1831 | char http_major_version;
|
---|
| 1832 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1833 | char http_minor_version;
|
---|
| 1834 | char *header_buf = header_buf; /* for gcc */
|
---|
| 1835 | char *header_ptr = header_ptr;
|
---|
| 1836 | Htaccess_Proxy *proxy_entry;
|
---|
| 1837 | #endif
|
---|
| 1838 |
|
---|
| 1839 | /* Allocation of iobuf is postponed until now
|
---|
| 1840 | * (IOW, server process doesn't need to waste 8k) */
|
---|
| 1841 | iobuf = xmalloc(IOBUF_SIZE);
|
---|
| 1842 |
|
---|
| 1843 | rmt_ip = 0;
|
---|
| 1844 | if (fromAddr->u.sa.sa_family == AF_INET) {
|
---|
| 1845 | rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
|
---|
| 1846 | }
|
---|
| 1847 | #if ENABLE_FEATURE_IPV6
|
---|
| 1848 | if (fromAddr->u.sa.sa_family == AF_INET6
|
---|
| 1849 | && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
|
---|
| 1850 | && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
|
---|
| 1851 | && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
|
---|
| 1852 | rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
|
---|
| 1853 | #endif
|
---|
| 1854 | if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
|
---|
| 1855 | /* NB: can be NULL (user runs httpd -i by hand?) */
|
---|
| 1856 | rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
|
---|
| 1857 | }
|
---|
| 1858 | if (verbose) {
|
---|
| 1859 | /* this trick makes -v logging much simpler */
|
---|
| 1860 | if (rmt_ip_str)
|
---|
| 1861 | applet_name = rmt_ip_str;
|
---|
| 1862 | if (verbose > 2)
|
---|
| 1863 | bb_error_msg("connected");
|
---|
| 1864 | }
|
---|
| 1865 |
|
---|
| 1866 | /* Install timeout handler. get_line() needs it. */
|
---|
| 1867 | signal(SIGALRM, send_REQUEST_TIMEOUT_and_exit);
|
---|
| 1868 |
|
---|
| 1869 | if (!get_line()) /* EOF or error or empty line */
|
---|
| 1870 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 1871 |
|
---|
| 1872 | /* Determine type of request (GET/POST) */
|
---|
| 1873 | urlp = strpbrk(iobuf, " \t");
|
---|
| 1874 | if (urlp == NULL)
|
---|
| 1875 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 1876 | *urlp++ = '\0';
|
---|
| 1877 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 1878 | prequest = request_GET;
|
---|
| 1879 | if (strcasecmp(iobuf, prequest) != 0) {
|
---|
| 1880 | prequest = request_HEAD;
|
---|
| 1881 | if (strcasecmp(iobuf, prequest) != 0) {
|
---|
| 1882 | prequest = "POST";
|
---|
| 1883 | if (strcasecmp(iobuf, prequest) != 0)
|
---|
| 1884 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
| 1885 | }
|
---|
| 1886 | }
|
---|
| 1887 | #else
|
---|
| 1888 | if (strcasecmp(iobuf, request_GET) != 0)
|
---|
| 1889 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
| 1890 | #endif
|
---|
| 1891 | urlp = skip_whitespace(urlp);
|
---|
| 1892 | if (urlp[0] != '/')
|
---|
| 1893 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 1894 |
|
---|
| 1895 | /* Find end of URL and parse HTTP version, if any */
|
---|
| 1896 | http_major_version = '0';
|
---|
| 1897 | IF_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
|
---|
| 1898 | tptr = strchrnul(urlp, ' ');
|
---|
| 1899 | /* Is it " HTTP/"? */
|
---|
| 1900 | if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
|
---|
| 1901 | http_major_version = tptr[6];
|
---|
| 1902 | IF_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
|
---|
| 1903 | }
|
---|
| 1904 | *tptr = '\0';
|
---|
| 1905 |
|
---|
| 1906 | /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
|
---|
| 1907 | urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
|
---|
| 1908 | /*if (urlcopy == NULL)
|
---|
| 1909 | * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
|
---|
| 1910 | strcpy(urlcopy, urlp);
|
---|
| 1911 | /* NB: urlcopy ptr is never changed after this */
|
---|
| 1912 |
|
---|
| 1913 | /* Extract url args if present */
|
---|
| 1914 | g_query = NULL;
|
---|
| 1915 | tptr = strchr(urlcopy, '?');
|
---|
| 1916 | if (tptr) {
|
---|
| 1917 | *tptr++ = '\0';
|
---|
| 1918 | g_query = tptr;
|
---|
| 1919 | }
|
---|
| 1920 |
|
---|
| 1921 | /* Decode URL escape sequences */
|
---|
| 1922 | tptr = decodeString(urlcopy, 0);
|
---|
| 1923 | if (tptr == NULL)
|
---|
| 1924 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 1925 | if (tptr == urlcopy + 1) {
|
---|
| 1926 | /* '/' or NUL is encoded */
|
---|
| 1927 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
| 1928 | }
|
---|
| 1929 |
|
---|
| 1930 | /* Canonicalize path */
|
---|
| 1931 | /* Algorithm stolen from libbb bb_simplify_path(),
|
---|
| 1932 | * but don't strdup, retain trailing slash, protect root */
|
---|
| 1933 | urlp = tptr = urlcopy;
|
---|
| 1934 | do {
|
---|
| 1935 | if (*urlp == '/') {
|
---|
| 1936 | /* skip duplicate (or initial) slash */
|
---|
| 1937 | if (*tptr == '/') {
|
---|
| 1938 | continue;
|
---|
| 1939 | }
|
---|
| 1940 | if (*tptr == '.') {
|
---|
| 1941 | /* skip extra "/./" */
|
---|
| 1942 | if (tptr[1] == '/' || !tptr[1]) {
|
---|
| 1943 | continue;
|
---|
| 1944 | }
|
---|
| 1945 | /* "..": be careful */
|
---|
| 1946 | if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
|
---|
| 1947 | ++tptr;
|
---|
| 1948 | if (urlp == urlcopy) /* protect root */
|
---|
| 1949 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 1950 | while (*--urlp != '/') /* omit previous dir */;
|
---|
| 1951 | continue;
|
---|
| 1952 | }
|
---|
| 1953 | }
|
---|
| 1954 | }
|
---|
| 1955 | *++urlp = *tptr;
|
---|
| 1956 | } while (*++tptr);
|
---|
| 1957 | *++urlp = '\0'; /* terminate after last character */
|
---|
| 1958 |
|
---|
| 1959 | /* If URL is a directory, add '/' */
|
---|
| 1960 | if (urlp[-1] != '/') {
|
---|
| 1961 | if (is_directory(urlcopy + 1, 1, NULL)) {
|
---|
| 1962 | found_moved_temporarily = urlcopy;
|
---|
| 1963 | }
|
---|
| 1964 | }
|
---|
| 1965 |
|
---|
| 1966 | /* Log it */
|
---|
| 1967 | if (verbose > 1)
|
---|
| 1968 | bb_error_msg("url:%s", urlcopy);
|
---|
| 1969 |
|
---|
| 1970 | tptr = urlcopy;
|
---|
| 1971 | ip_allowed = checkPermIP();
|
---|
| 1972 | while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
|
---|
| 1973 | /* have path1/path2 */
|
---|
| 1974 | *tptr = '\0';
|
---|
| 1975 | if (is_directory(urlcopy + 1, 1, NULL)) {
|
---|
| 1976 | /* may have subdir config */
|
---|
| 1977 | parse_conf(urlcopy + 1, SUBDIR_PARSE);
|
---|
| 1978 | ip_allowed = checkPermIP();
|
---|
| 1979 | }
|
---|
| 1980 | *tptr = '/';
|
---|
| 1981 | }
|
---|
| 1982 |
|
---|
| 1983 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1984 | proxy_entry = find_proxy_entry(urlcopy);
|
---|
| 1985 | if (proxy_entry)
|
---|
| 1986 | header_buf = header_ptr = xmalloc(IOBUF_SIZE);
|
---|
| 1987 | #endif
|
---|
| 1988 |
|
---|
| 1989 | if (http_major_version >= '0') {
|
---|
| 1990 | /* Request was with "... HTTP/nXXX", and n >= 0 */
|
---|
| 1991 |
|
---|
| 1992 | /* Read until blank line */
|
---|
| 1993 | while (1) {
|
---|
| 1994 | if (!get_line())
|
---|
| 1995 | break; /* EOF or error or empty line */
|
---|
| 1996 | if (DEBUG)
|
---|
| 1997 | bb_error_msg("header: '%s'", iobuf);
|
---|
| 1998 |
|
---|
| 1999 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2000 | /* We need 2 more bytes for yet another "\r\n" -
|
---|
| 2001 | * see near fdprintf(proxy_fd...) further below */
|
---|
| 2002 | if (proxy_entry && (header_ptr - header_buf) < IOBUF_SIZE - 2) {
|
---|
| 2003 | int len = strlen(iobuf);
|
---|
| 2004 | if (len > IOBUF_SIZE - (header_ptr - header_buf) - 4)
|
---|
| 2005 | len = IOBUF_SIZE - (header_ptr - header_buf) - 4;
|
---|
| 2006 | memcpy(header_ptr, iobuf, len);
|
---|
| 2007 | header_ptr += len;
|
---|
| 2008 | header_ptr[0] = '\r';
|
---|
| 2009 | header_ptr[1] = '\n';
|
---|
| 2010 | header_ptr += 2;
|
---|
| 2011 | }
|
---|
| 2012 | #endif
|
---|
| 2013 |
|
---|
| 2014 | #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2015 | /* Try and do our best to parse more lines */
|
---|
| 2016 | if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
|
---|
| 2017 | /* extra read only for POST */
|
---|
| 2018 | if (prequest != request_GET
|
---|
| 2019 | # if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2020 | && prequest != request_HEAD
|
---|
| 2021 | # endif
|
---|
| 2022 | ) {
|
---|
| 2023 | tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
|
---|
| 2024 | if (!tptr[0])
|
---|
| 2025 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 2026 | /* not using strtoul: it ignores leading minus! */
|
---|
| 2027 | length = bb_strtou(tptr, NULL, 10);
|
---|
| 2028 | /* length is "ulong", but we need to pass it to int later */
|
---|
| 2029 | if (errno || length > INT_MAX)
|
---|
| 2030 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 2031 | }
|
---|
| 2032 | }
|
---|
| 2033 | #endif
|
---|
| 2034 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2035 | else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
|
---|
| 2036 | cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
|
---|
| 2037 | } else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
|
---|
| 2038 | content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
|
---|
| 2039 | } else if (STRNCASECMP(iobuf, "Referer:") == 0) {
|
---|
| 2040 | referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
|
---|
| 2041 | } else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
|
---|
| 2042 | user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
|
---|
| 2043 | } else if (STRNCASECMP(iobuf, "Host:") == 0) {
|
---|
| 2044 | host = xstrdup(skip_whitespace(iobuf + sizeof("Host:")-1));
|
---|
| 2045 | } else if (STRNCASECMP(iobuf, "Accept:") == 0) {
|
---|
| 2046 | http_accept = xstrdup(skip_whitespace(iobuf + sizeof("Accept:")-1));
|
---|
| 2047 | } else if (STRNCASECMP(iobuf, "Accept-Language:") == 0) {
|
---|
| 2048 | http_accept_language = xstrdup(skip_whitespace(iobuf + sizeof("Accept-Language:")-1));
|
---|
| 2049 | }
|
---|
| 2050 | #endif
|
---|
| 2051 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 2052 | if (STRNCASECMP(iobuf, "Authorization:") == 0) {
|
---|
| 2053 | /* We only allow Basic credentials.
|
---|
| 2054 | * It shows up as "Authorization: Basic <user>:<passwd>" where
|
---|
| 2055 | * "<user>:<passwd>" is base64 encoded.
|
---|
| 2056 | */
|
---|
| 2057 | tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
|
---|
| 2058 | if (STRNCASECMP(tptr, "Basic") != 0)
|
---|
| 2059 | continue;
|
---|
| 2060 | tptr += sizeof("Basic")-1;
|
---|
| 2061 | /* decodeBase64() skips whitespace itself */
|
---|
| 2062 | decodeBase64(tptr);
|
---|
| 2063 | authorized = check_user_passwd(urlcopy, tptr);
|
---|
| 2064 | }
|
---|
| 2065 | #endif
|
---|
| 2066 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 2067 | if (STRNCASECMP(iobuf, "Range:") == 0) {
|
---|
| 2068 | /* We know only bytes=NNN-[MMM] */
|
---|
| 2069 | char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
|
---|
| 2070 | if (strncmp(s, "bytes=", 6) == 0) {
|
---|
| 2071 | s += sizeof("bytes=")-1;
|
---|
| 2072 | range_start = BB_STRTOOFF(s, &s, 10);
|
---|
| 2073 | if (s[0] != '-' || range_start < 0) {
|
---|
| 2074 | range_start = 0;
|
---|
| 2075 | } else if (s[1]) {
|
---|
| 2076 | range_end = BB_STRTOOFF(s+1, NULL, 10);
|
---|
| 2077 | if (errno || range_end < range_start)
|
---|
| 2078 | range_start = 0;
|
---|
| 2079 | }
|
---|
| 2080 | }
|
---|
| 2081 | }
|
---|
| 2082 | #endif
|
---|
| 2083 | #if ENABLE_FEATURE_HTTPD_GZIP
|
---|
| 2084 | if (STRNCASECMP(iobuf, "Accept-Encoding:") == 0) {
|
---|
| 2085 | /* Note: we do not support "gzip;q=0"
|
---|
| 2086 | * method of _disabling_ gzip
|
---|
| 2087 | * delivery. No one uses that, though */
|
---|
| 2088 | const char *s = strstr(iobuf, "gzip");
|
---|
| 2089 | if (s) {
|
---|
| 2090 | // want more thorough checks?
|
---|
| 2091 | //if (s[-1] == ' '
|
---|
| 2092 | // || s[-1] == ','
|
---|
| 2093 | // || s[-1] == ':'
|
---|
| 2094 | //) {
|
---|
| 2095 | content_gzip = 1;
|
---|
| 2096 | //}
|
---|
| 2097 | }
|
---|
| 2098 | }
|
---|
| 2099 | #endif
|
---|
| 2100 | } /* while extra header reading */
|
---|
| 2101 | }
|
---|
| 2102 |
|
---|
| 2103 | /* We are done reading headers, disable peer timeout */
|
---|
| 2104 | alarm(0);
|
---|
| 2105 |
|
---|
| 2106 | if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
|
---|
| 2107 | /* protect listing [/path]/httpd.conf or IP deny */
|
---|
| 2108 | send_headers_and_exit(HTTP_FORBIDDEN);
|
---|
| 2109 | }
|
---|
| 2110 |
|
---|
| 2111 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 2112 | /* Case: no "Authorization:" was seen, but page does require passwd.
|
---|
| 2113 | * Check that with dummy user:pass */
|
---|
| 2114 | if (authorized < 0)
|
---|
| 2115 | authorized = check_user_passwd(urlcopy, ":");
|
---|
| 2116 | if (!authorized)
|
---|
| 2117 | send_headers_and_exit(HTTP_UNAUTHORIZED);
|
---|
| 2118 | #endif
|
---|
| 2119 |
|
---|
| 2120 | if (found_moved_temporarily) {
|
---|
| 2121 | send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
|
---|
| 2122 | }
|
---|
| 2123 |
|
---|
| 2124 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2125 | if (proxy_entry != NULL) {
|
---|
| 2126 | int proxy_fd;
|
---|
| 2127 | len_and_sockaddr *lsa;
|
---|
| 2128 |
|
---|
| 2129 | proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
|
---|
| 2130 | if (proxy_fd < 0)
|
---|
| 2131 | send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
|
---|
| 2132 | lsa = host2sockaddr(proxy_entry->host_port, 80);
|
---|
| 2133 | if (lsa == NULL)
|
---|
| 2134 | send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
|
---|
| 2135 | if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
|
---|
| 2136 | send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
|
---|
| 2137 | fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
|
---|
| 2138 | prequest, /* GET or POST */
|
---|
| 2139 | proxy_entry->url_to, /* url part 1 */
|
---|
| 2140 | urlcopy + strlen(proxy_entry->url_from), /* url part 2 */
|
---|
| 2141 | (g_query ? "?" : ""), /* "?" (maybe) */
|
---|
| 2142 | (g_query ? g_query : ""), /* query string (maybe) */
|
---|
| 2143 | http_major_version, http_minor_version);
|
---|
| 2144 | header_ptr[0] = '\r';
|
---|
| 2145 | header_ptr[1] = '\n';
|
---|
| 2146 | header_ptr += 2;
|
---|
| 2147 | write(proxy_fd, header_buf, header_ptr - header_buf);
|
---|
| 2148 | free(header_buf); /* on the order of 8k, free it */
|
---|
| 2149 | cgi_io_loop_and_exit(proxy_fd, proxy_fd, length);
|
---|
| 2150 | }
|
---|
| 2151 | #endif
|
---|
| 2152 |
|
---|
| 2153 | tptr = urlcopy + 1; /* skip first '/' */
|
---|
| 2154 |
|
---|
| 2155 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2156 | if (strncmp(tptr, "cgi-bin/", 8) == 0) {
|
---|
| 2157 | if (tptr[8] == '\0') {
|
---|
| 2158 | /* protect listing "cgi-bin/" */
|
---|
| 2159 | send_headers_and_exit(HTTP_FORBIDDEN);
|
---|
| 2160 | }
|
---|
| 2161 | send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
|
---|
| 2162 | }
|
---|
| 2163 | #endif
|
---|
| 2164 |
|
---|
| 2165 | if (urlp[-1] == '/')
|
---|
| 2166 | strcpy(urlp, index_page);
|
---|
| 2167 | if (stat(tptr, &sb) == 0) {
|
---|
| 2168 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 2169 | char *suffix = strrchr(tptr, '.');
|
---|
| 2170 | if (suffix) {
|
---|
| 2171 | Htaccess *cur;
|
---|
| 2172 | for (cur = script_i; cur; cur = cur->next) {
|
---|
| 2173 | if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
---|
| 2174 | send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
|
---|
| 2175 | }
|
---|
| 2176 | }
|
---|
| 2177 | }
|
---|
| 2178 | #endif
|
---|
| 2179 | file_size = sb.st_size;
|
---|
| 2180 | last_mod = sb.st_mtime;
|
---|
| 2181 | }
|
---|
| 2182 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2183 | else if (urlp[-1] == '/') {
|
---|
| 2184 | /* It's a dir URL and there is no index.html
|
---|
| 2185 | * Try cgi-bin/index.cgi */
|
---|
| 2186 | if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
|
---|
| 2187 | urlp[0] = '\0';
|
---|
| 2188 | g_query = urlcopy;
|
---|
| 2189 | send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
|
---|
| 2190 | }
|
---|
| 2191 | }
|
---|
| 2192 | /* else fall through to send_file, it errors out if open fails: */
|
---|
| 2193 |
|
---|
| 2194 | if (prequest != request_GET && prequest != request_HEAD) {
|
---|
| 2195 | /* POST for files does not make sense */
|
---|
| 2196 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
| 2197 | }
|
---|
| 2198 | send_file_and_exit(tptr,
|
---|
| 2199 | (prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
|
---|
| 2200 | );
|
---|
| 2201 | #else
|
---|
| 2202 | send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
|
---|
| 2203 | #endif
|
---|
| 2204 | }
|
---|
| 2205 |
|
---|
| 2206 | /*
|
---|
| 2207 | * The main http server function.
|
---|
| 2208 | * Given a socket, listen for new connections and farm out
|
---|
| 2209 | * the processing as a [v]forked process.
|
---|
| 2210 | * Never returns.
|
---|
| 2211 | */
|
---|
| 2212 | #if BB_MMU
|
---|
| 2213 | static void mini_httpd(int server_socket) NORETURN;
|
---|
| 2214 | static void mini_httpd(int server_socket)
|
---|
| 2215 | {
|
---|
| 2216 | /* NB: it's best to not use xfuncs in this loop before fork().
|
---|
| 2217 | * Otherwise server may die on transient errors (temporary
|
---|
| 2218 | * out-of-memory condition, etc), which is Bad(tm).
|
---|
| 2219 | * Try to do any dangerous calls after fork.
|
---|
| 2220 | */
|
---|
| 2221 | while (1) {
|
---|
| 2222 | int n;
|
---|
| 2223 | len_and_sockaddr fromAddr;
|
---|
| 2224 |
|
---|
| 2225 | /* Wait for connections... */
|
---|
| 2226 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
| 2227 | n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
|
---|
| 2228 | if (n < 0)
|
---|
| 2229 | continue;
|
---|
| 2230 |
|
---|
| 2231 | /* set the KEEPALIVE option to cull dead connections */
|
---|
| 2232 | setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
---|
| 2233 |
|
---|
| 2234 | if (fork() == 0) {
|
---|
| 2235 | /* child */
|
---|
| 2236 | /* Do not reload config on HUP */
|
---|
| 2237 | signal(SIGHUP, SIG_IGN);
|
---|
| 2238 | close(server_socket);
|
---|
| 2239 | xmove_fd(n, 0);
|
---|
| 2240 | xdup2(0, 1);
|
---|
| 2241 |
|
---|
| 2242 | handle_incoming_and_exit(&fromAddr);
|
---|
| 2243 | }
|
---|
| 2244 | /* parent, or fork failed */
|
---|
| 2245 | close(n);
|
---|
| 2246 | } /* while (1) */
|
---|
| 2247 | /* never reached */
|
---|
| 2248 | }
|
---|
| 2249 | #else
|
---|
| 2250 | static void mini_httpd_nommu(int server_socket, int argc, char **argv) NORETURN;
|
---|
| 2251 | static void mini_httpd_nommu(int server_socket, int argc, char **argv)
|
---|
| 2252 | {
|
---|
| 2253 | char *argv_copy[argc + 2];
|
---|
| 2254 |
|
---|
| 2255 | argv_copy[0] = argv[0];
|
---|
| 2256 | argv_copy[1] = (char*)"-i";
|
---|
| 2257 | memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
|
---|
| 2258 |
|
---|
| 2259 | /* NB: it's best to not use xfuncs in this loop before vfork().
|
---|
| 2260 | * Otherwise server may die on transient errors (temporary
|
---|
| 2261 | * out-of-memory condition, etc), which is Bad(tm).
|
---|
| 2262 | * Try to do any dangerous calls after fork.
|
---|
| 2263 | */
|
---|
| 2264 | while (1) {
|
---|
| 2265 | int n;
|
---|
| 2266 | len_and_sockaddr fromAddr;
|
---|
| 2267 |
|
---|
| 2268 | /* Wait for connections... */
|
---|
| 2269 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
| 2270 | n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
|
---|
| 2271 | if (n < 0)
|
---|
| 2272 | continue;
|
---|
| 2273 |
|
---|
| 2274 | /* set the KEEPALIVE option to cull dead connections */
|
---|
| 2275 | setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
---|
| 2276 |
|
---|
| 2277 | if (vfork() == 0) {
|
---|
| 2278 | /* child */
|
---|
| 2279 | /* Do not reload config on HUP */
|
---|
| 2280 | signal(SIGHUP, SIG_IGN);
|
---|
| 2281 | close(server_socket);
|
---|
| 2282 | xmove_fd(n, 0);
|
---|
| 2283 | xdup2(0, 1);
|
---|
| 2284 |
|
---|
| 2285 | /* Run a copy of ourself in inetd mode */
|
---|
| 2286 | re_exec(argv_copy);
|
---|
| 2287 | }
|
---|
| 2288 | /* parent, or vfork failed */
|
---|
| 2289 | close(n);
|
---|
| 2290 | } /* while (1) */
|
---|
| 2291 | /* never reached */
|
---|
| 2292 | }
|
---|
| 2293 | #endif
|
---|
| 2294 |
|
---|
| 2295 | /*
|
---|
| 2296 | * Process a HTTP connection on stdin/out.
|
---|
| 2297 | * Never returns.
|
---|
| 2298 | */
|
---|
| 2299 | static void mini_httpd_inetd(void) NORETURN;
|
---|
| 2300 | static void mini_httpd_inetd(void)
|
---|
| 2301 | {
|
---|
| 2302 | len_and_sockaddr fromAddr;
|
---|
| 2303 |
|
---|
| 2304 | memset(&fromAddr, 0, sizeof(fromAddr));
|
---|
| 2305 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
| 2306 | /* NB: can fail if user runs it by hand and types in http cmds */
|
---|
| 2307 | getpeername(0, &fromAddr.u.sa, &fromAddr.len);
|
---|
| 2308 | handle_incoming_and_exit(&fromAddr);
|
---|
| 2309 | }
|
---|
| 2310 |
|
---|
| 2311 | static void sighup_handler(int sig UNUSED_PARAM)
|
---|
| 2312 | {
|
---|
| 2313 | parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
|
---|
| 2314 | }
|
---|
| 2315 |
|
---|
| 2316 | enum {
|
---|
| 2317 | c_opt_config_file = 0,
|
---|
| 2318 | d_opt_decode_url,
|
---|
| 2319 | h_opt_home_httpd,
|
---|
| 2320 | IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
|
---|
| 2321 | IF_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
|
---|
| 2322 | IF_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
|
---|
| 2323 | IF_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
|
---|
| 2324 | p_opt_port ,
|
---|
| 2325 | p_opt_inetd ,
|
---|
| 2326 | p_opt_foreground,
|
---|
| 2327 | p_opt_verbose ,
|
---|
| 2328 | OPT_CONFIG_FILE = 1 << c_opt_config_file,
|
---|
| 2329 | OPT_DECODE_URL = 1 << d_opt_decode_url,
|
---|
| 2330 | OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
|
---|
| 2331 | OPT_ENCODE_URL = IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
|
---|
| 2332 | OPT_REALM = IF_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
|
---|
| 2333 | OPT_MD5 = IF_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
|
---|
| 2334 | OPT_SETUID = IF_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
|
---|
| 2335 | OPT_PORT = 1 << p_opt_port,
|
---|
| 2336 | OPT_INETD = 1 << p_opt_inetd,
|
---|
| 2337 | OPT_FOREGROUND = 1 << p_opt_foreground,
|
---|
| 2338 | OPT_VERBOSE = 1 << p_opt_verbose,
|
---|
| 2339 | };
|
---|
| 2340 |
|
---|
| 2341 |
|
---|
| 2342 | int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 2343 | int httpd_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 2344 | {
|
---|
| 2345 | int server_socket = server_socket; /* for gcc */
|
---|
| 2346 | unsigned opt;
|
---|
| 2347 | char *url_for_decode;
|
---|
| 2348 | IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
|
---|
| 2349 | IF_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
|
---|
| 2350 | IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
|
---|
| 2351 | IF_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
|
---|
| 2352 |
|
---|
| 2353 | INIT_G();
|
---|
| 2354 |
|
---|
| 2355 | #if ENABLE_LOCALE_SUPPORT
|
---|
| 2356 | /* Undo busybox.c: we want to speak English in http (dates etc) */
|
---|
| 2357 | setlocale(LC_TIME, "C");
|
---|
| 2358 | #endif
|
---|
| 2359 |
|
---|
| 2360 | home_httpd = xrealloc_getcwd_or_warn(NULL);
|
---|
| 2361 | /* -v counts, -i implies -f */
|
---|
| 2362 | opt_complementary = "vv:if";
|
---|
| 2363 | /* We do not "absolutize" path given by -h (home) opt.
|
---|
| 2364 | * If user gives relative path in -h,
|
---|
| 2365 | * $SCRIPT_FILENAME will not be set. */
|
---|
| 2366 | opt = getopt32(argv, "c:d:h:"
|
---|
| 2367 | IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
|
---|
| 2368 | IF_FEATURE_HTTPD_BASIC_AUTH("r:")
|
---|
| 2369 | IF_FEATURE_HTTPD_AUTH_MD5("m:")
|
---|
| 2370 | IF_FEATURE_HTTPD_SETUID("u:")
|
---|
| 2371 | "p:ifv",
|
---|
| 2372 | &opt_c_configFile, &url_for_decode, &home_httpd
|
---|
| 2373 | IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
|
---|
| 2374 | IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
|
---|
| 2375 | IF_FEATURE_HTTPD_AUTH_MD5(, &pass)
|
---|
| 2376 | IF_FEATURE_HTTPD_SETUID(, &s_ugid)
|
---|
| 2377 | , &bind_addr_or_port
|
---|
| 2378 | , &verbose
|
---|
| 2379 | );
|
---|
| 2380 | if (opt & OPT_DECODE_URL) {
|
---|
| 2381 | fputs(decodeString(url_for_decode, 1), stdout);
|
---|
| 2382 | return 0;
|
---|
| 2383 | }
|
---|
| 2384 | #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
---|
| 2385 | if (opt & OPT_ENCODE_URL) {
|
---|
| 2386 | fputs(encodeString(url_for_encode), stdout);
|
---|
| 2387 | return 0;
|
---|
| 2388 | }
|
---|
| 2389 | #endif
|
---|
| 2390 | #if ENABLE_FEATURE_HTTPD_AUTH_MD5
|
---|
| 2391 | if (opt & OPT_MD5) {
|
---|
| 2392 | char salt[sizeof("$1$XXXXXXXX")];
|
---|
| 2393 | salt[0] = '$';
|
---|
| 2394 | salt[1] = '1';
|
---|
| 2395 | salt[2] = '$';
|
---|
| 2396 | crypt_make_salt(salt + 3, 4, 0);
|
---|
| 2397 | puts(pw_encrypt(pass, salt, 1));
|
---|
| 2398 | return 0;
|
---|
| 2399 | }
|
---|
| 2400 | #endif
|
---|
| 2401 | #if ENABLE_FEATURE_HTTPD_SETUID
|
---|
| 2402 | if (opt & OPT_SETUID) {
|
---|
| 2403 | xget_uidgid(&ugid, s_ugid);
|
---|
| 2404 | }
|
---|
| 2405 | #endif
|
---|
| 2406 |
|
---|
| 2407 | #if !BB_MMU
|
---|
| 2408 | if (!(opt & OPT_FOREGROUND)) {
|
---|
| 2409 | bb_daemonize_or_rexec(0, argv); /* don't change current directory */
|
---|
| 2410 | }
|
---|
| 2411 | #endif
|
---|
| 2412 |
|
---|
| 2413 | xchdir(home_httpd);
|
---|
| 2414 | if (!(opt & OPT_INETD)) {
|
---|
| 2415 | signal(SIGCHLD, SIG_IGN);
|
---|
| 2416 | server_socket = openServer();
|
---|
| 2417 | #if ENABLE_FEATURE_HTTPD_SETUID
|
---|
| 2418 | /* drop privileges */
|
---|
| 2419 | if (opt & OPT_SETUID) {
|
---|
| 2420 | if (ugid.gid != (gid_t)-1) {
|
---|
| 2421 | if (setgroups(1, &ugid.gid) == -1)
|
---|
| 2422 | bb_perror_msg_and_die("setgroups");
|
---|
| 2423 | xsetgid(ugid.gid);
|
---|
| 2424 | }
|
---|
| 2425 | xsetuid(ugid.uid);
|
---|
| 2426 | }
|
---|
| 2427 | #endif
|
---|
| 2428 | }
|
---|
| 2429 |
|
---|
| 2430 | #if 0
|
---|
| 2431 | /* User can do it himself: 'env - PATH="$PATH" httpd'
|
---|
| 2432 | * We don't do it because we don't want to screw users
|
---|
| 2433 | * which want to do
|
---|
| 2434 | * 'env - VAR1=val1 VAR2=val2 httpd'
|
---|
| 2435 | * and have VAR1 and VAR2 values visible in their CGIs.
|
---|
| 2436 | * Besides, it is also smaller. */
|
---|
| 2437 | {
|
---|
| 2438 | char *p = getenv("PATH");
|
---|
| 2439 | /* env strings themself are not freed, no need to xstrdup(p): */
|
---|
| 2440 | clearenv();
|
---|
| 2441 | if (p)
|
---|
| 2442 | putenv(p - 5);
|
---|
| 2443 | // if (!(opt & OPT_INETD))
|
---|
| 2444 | // setenv_long("SERVER_PORT", ???);
|
---|
| 2445 | }
|
---|
| 2446 | #endif
|
---|
| 2447 |
|
---|
| 2448 | parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
|
---|
| 2449 | if (!(opt & OPT_INETD))
|
---|
| 2450 | signal(SIGHUP, sighup_handler);
|
---|
| 2451 |
|
---|
| 2452 | xfunc_error_retval = 0;
|
---|
| 2453 | if (opt & OPT_INETD)
|
---|
| 2454 | mini_httpd_inetd();
|
---|
| 2455 | #if BB_MMU
|
---|
| 2456 | if (!(opt & OPT_FOREGROUND))
|
---|
| 2457 | bb_daemonize(0); /* don't change current directory */
|
---|
| 2458 | mini_httpd(server_socket); /* never returns */
|
---|
| 2459 | #else
|
---|
| 2460 | mini_httpd_nommu(server_socket, argc, argv); /* never returns */
|
---|
| 2461 | #endif
|
---|
| 2462 | /* return 0; */
|
---|
| 2463 | }
|
---|