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 | * simplify patch stolen from libbb without using strdup
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9 | *
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10 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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11 | *
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12 | *****************************************************************************
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13 | *
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14 | * Typical usage:
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15 | * for non root user
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16 | * httpd -p 8080 -h $HOME/public_html
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17 | * or for daemon start from rc script with uid=0:
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18 | * httpd -u www
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19 | * This is equivalent if www user have uid=80 to
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20 | * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
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21 | *
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22 | *
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23 | * When a url starts by "/cgi-bin/" it is assumed to be a cgi script. The
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24 | * server changes directory to the location of the script and executes it
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25 | * after setting QUERY_STRING and other environment variables.
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26 | *
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27 | * Doc:
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28 | * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
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29 | *
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30 | * The server can also be invoked as a url arg decoder and html text encoder
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31 | * as follows:
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32 | * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
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33 | * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
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34 | * Note that url encoding for arguments is not the same as html encoding for
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35 | * presentation. -d decodes a url-encoded argument while -e encodes in html
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36 | * for page display.
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37 | *
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38 | * httpd.conf has the following format:
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39 | *
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40 | * A:172.20. # Allow address from 172.20.0.0/16
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41 | * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
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42 | * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
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43 | * A:127.0.0.1 # Allow local loopback connections
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44 | * D:* # Deny from other IP connections
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45 | * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
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46 | * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
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47 | * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
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48 | * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
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49 | * .au:audio/basic # additional mime type for audio.au files
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50 | * *.php:/path/php # running cgi.php scripts through an interpreter
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51 | *
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52 | * A/D may be as a/d or allow/deny - first char case insensitive
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53 | * Deny IP rules take precedence over allow rules.
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54 | *
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55 | *
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56 | * The Deny/Allow IP logic:
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57 | *
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58 | * - Default is to allow all. No addresses are denied unless
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59 | * denied with a D: rule.
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60 | * - Order of Deny/Allow rules is significant
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61 | * - Deny rules take precedence over allow rules.
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62 | * - If a deny all rule (D:*) is used it acts as a catch-all for unmatched
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63 | * addresses.
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64 | * - Specification of Allow all (A:*) is a no-op
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65 | *
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66 | * Example:
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67 | * 1. Allow only specified addresses
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68 | * A:172.20 # Allow any address that begins with 172.20.
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69 | * A:10.10. # Allow any address that begins with 10.10.
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70 | * A:127.0.0.1 # Allow local loopback connections
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71 | * D:* # Deny from other IP connections
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72 | *
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73 | * 2. Only deny specified addresses
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74 | * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
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75 | * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
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76 | * A:* # (optional line added for clarity)
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77 | *
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78 | * If a sub directory contains a config file it is parsed and merged with
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79 | * any existing settings as if it was appended to the original configuration.
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80 | *
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81 | * subdir paths are relative to the containing subdir and thus cannot
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82 | * affect the parent rules.
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83 | *
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84 | * Note that since the sub dir is parsed in the forked thread servicing the
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85 | * subdir http request, any merge is discarded when the process exits. As a
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86 | * result, the subdir settings only have a lifetime of a single request.
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87 | *
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88 | * Custom error pages can contain an absolute path or be relative to
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89 | * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
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90 | * page can only be defined in the root configuration file and are not taken
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91 | * into account in local (directories) config files.
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92 | *
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93 | * If -c is not set, an attempt will be made to open the default
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94 | * root configuration file. If -c is set and the file is not found, the
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95 | * server exits with an error.
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96 | *
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97 | */
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98 |
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99 | #include "libbb.h"
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100 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
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101 | #include <sys/sendfile.h>
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102 | #endif
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103 |
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104 | //#define DEBUG 1
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105 | #define DEBUG 0
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106 |
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107 | /* amount of buffering in a pipe */
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108 | #ifndef PIPE_BUF
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109 | # define PIPE_BUF 4096
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110 | #endif
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111 |
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112 | #define IOBUF_SIZE 8192 /* IO buffer */
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113 |
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114 | #define HEADER_READ_TIMEOUT 60
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115 |
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116 | static const char default_path_httpd_conf[] ALIGN1 = "/etc";
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117 | static const char httpd_conf[] ALIGN1 = "httpd.conf";
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118 | static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
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119 |
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120 | typedef struct has_next_ptr {
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121 | struct has_next_ptr *next;
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122 | } has_next_ptr;
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123 |
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124 | /* Must have "next" as a first member */
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125 | typedef struct Htaccess {
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126 | struct Htaccess *next;
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127 | char *after_colon;
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128 | char before_colon[1]; /* really bigger, must be last */
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129 | } Htaccess;
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130 |
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131 | /* Must have "next" as a first member */
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132 | typedef struct Htaccess_IP {
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133 | struct Htaccess_IP *next;
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134 | unsigned ip;
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135 | unsigned mask;
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136 | int allow_deny;
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137 | } Htaccess_IP;
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138 |
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139 | enum {
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140 | HTTP_OK = 200,
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141 | HTTP_MOVED_TEMPORARILY = 302,
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142 | HTTP_BAD_REQUEST = 400, /* malformed syntax */
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143 | HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
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144 | HTTP_NOT_FOUND = 404,
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145 | HTTP_FORBIDDEN = 403,
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146 | HTTP_REQUEST_TIMEOUT = 408,
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147 | HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
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148 | HTTP_INTERNAL_SERVER_ERROR = 500,
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149 | HTTP_CONTINUE = 100,
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150 | #if 0 /* future use */
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151 | HTTP_SWITCHING_PROTOCOLS = 101,
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152 | HTTP_CREATED = 201,
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153 | HTTP_ACCEPTED = 202,
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154 | HTTP_NON_AUTHORITATIVE_INFO = 203,
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155 | HTTP_NO_CONTENT = 204,
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156 | HTTP_MULTIPLE_CHOICES = 300,
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157 | HTTP_MOVED_PERMANENTLY = 301,
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158 | HTTP_NOT_MODIFIED = 304,
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159 | HTTP_PAYMENT_REQUIRED = 402,
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160 | HTTP_BAD_GATEWAY = 502,
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161 | HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
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162 | HTTP_RESPONSE_SETSIZE = 0xffffffff
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163 | #endif
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164 | };
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165 |
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166 | static const uint16_t http_response_type[] ALIGN2 = {
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167 | HTTP_OK,
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168 | HTTP_MOVED_TEMPORARILY,
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169 | HTTP_REQUEST_TIMEOUT,
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170 | HTTP_NOT_IMPLEMENTED,
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171 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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172 | HTTP_UNAUTHORIZED,
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173 | #endif
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174 | HTTP_NOT_FOUND,
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175 | HTTP_BAD_REQUEST,
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176 | HTTP_FORBIDDEN,
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177 | HTTP_INTERNAL_SERVER_ERROR,
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178 | #if 0 /* not implemented */
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179 | HTTP_CREATED,
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180 | HTTP_ACCEPTED,
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181 | HTTP_NO_CONTENT,
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182 | HTTP_MULTIPLE_CHOICES,
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183 | HTTP_MOVED_PERMANENTLY,
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184 | HTTP_NOT_MODIFIED,
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185 | HTTP_BAD_GATEWAY,
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186 | HTTP_SERVICE_UNAVAILABLE,
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187 | #endif
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188 | };
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189 |
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190 | static const struct {
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191 | const char *name;
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192 | const char *info;
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193 | } http_response[ARRAY_SIZE(http_response_type)] = {
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194 | { "OK", NULL },
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195 | { "Found", "Directories must end with a slash" }, /* ?? */
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196 | { "Request Timeout", "No request appeared within 60 seconds" },
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197 | { "Not Implemented", "The requested method is not recognized" },
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198 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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199 | { "Unauthorized", "" },
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200 | #endif
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201 | { "Not Found", "The requested URL was not found" },
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202 | { "Bad Request", "Unsupported method" },
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203 | { "Forbidden", "" },
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204 | { "Internal Server Error", "Internal Server Error" },
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205 | #if 0 /* not implemented */
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206 | { "Created" },
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207 | { "Accepted" },
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208 | { "No Content" },
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209 | { "Multiple Choices" },
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210 | { "Moved Permanently" },
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211 | { "Not Modified" },
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212 | { "Bad Gateway", "" },
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213 | { "Service Unavailable", "" },
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214 | #endif
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215 | };
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216 |
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217 | struct globals {
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218 | int verbose; /* must be int (used by getopt32) */
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219 | smallint flg_deny_all;
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220 |
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221 | unsigned rmt_ip; /* used for IP-based allow/deny rules */
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222 | time_t last_mod;
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223 | off_t ContentLength; /* -1 - unknown */
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224 | char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
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225 | const char *bind_addr_or_port;
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226 |
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227 | const char *g_query;
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228 | const char *configFile;
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229 | const char *home_httpd;
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230 |
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231 | const char *found_mime_type;
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232 | const char *found_moved_temporarily;
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233 | Htaccess_IP *ip_a_d; /* config allow/deny lines */
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234 |
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235 | USE_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
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236 | USE_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
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237 | USE_FEATURE_HTTPD_CGI(char *referer;)
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238 | USE_FEATURE_HTTPD_CGI(char *user_agent;)
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239 |
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240 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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241 | Htaccess *g_auth; /* config user:password lines */
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242 | #endif
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243 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
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244 | Htaccess *mime_a; /* config mime types */
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245 | #endif
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246 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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247 | Htaccess *script_i; /* config script interpreters */
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248 | #endif
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249 | char *iobuf; /* [IOBUF_SIZE] */
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250 | #define hdr_buf bb_common_bufsiz1
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251 | char *hdr_ptr;
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252 | int hdr_cnt;
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253 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
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254 | const char *http_error_page[ARRAY_SIZE(http_response_type)];
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255 | #endif
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256 | };
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257 | #define G (*ptr_to_globals)
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258 | #define verbose (G.verbose )
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259 | #define flg_deny_all (G.flg_deny_all )
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260 | #define rmt_ip (G.rmt_ip )
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261 | #define bind_addr_or_port (G.bind_addr_or_port)
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262 | #define g_query (G.g_query )
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263 | #define configFile (G.configFile )
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264 | #define home_httpd (G.home_httpd )
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265 | #define found_mime_type (G.found_mime_type )
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266 | #define found_moved_temporarily (G.found_moved_temporarily)
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267 | #define ContentLength (G.ContentLength )
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268 | #define last_mod (G.last_mod )
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269 | #define ip_a_d (G.ip_a_d )
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270 | #define g_realm (G.g_realm )
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271 | #define remoteuser (G.remoteuser )
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272 | #define referer (G.referer )
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273 | #define user_agent (G.user_agent )
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274 | #define rmt_ip_str (G.rmt_ip_str )
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275 | #define g_auth (G.g_auth )
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276 | #define mime_a (G.mime_a )
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277 | #define script_i (G.script_i )
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278 | #define iobuf (G.iobuf )
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279 | #define hdr_ptr (G.hdr_ptr )
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280 | #define hdr_cnt (G.hdr_cnt )
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281 | #define http_error_page (G.http_error_page )
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282 | #define INIT_G() do { \
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283 | PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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284 | USE_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
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285 | bind_addr_or_port = "80"; \
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286 | ContentLength = -1; \
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287 | } while (0)
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288 |
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289 |
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290 | #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
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291 |
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292 | /* Prototypes */
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293 | static void send_file_and_exit(const char *url, int headers) ATTRIBUTE_NORETURN;
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294 |
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295 | static void free_llist(has_next_ptr **pptr)
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296 | {
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297 | has_next_ptr *cur = *pptr;
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298 | while (cur) {
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299 | has_next_ptr *t = cur;
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300 | cur = cur->next;
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301 | free(t);
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302 | }
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303 | *pptr = NULL;
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304 | }
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305 |
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306 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
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307 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
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308 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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309 | static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
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310 | {
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311 | free_llist((has_next_ptr**)pptr);
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312 | }
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313 | #endif
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314 |
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315 | static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
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316 | {
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317 | free_llist((has_next_ptr**)pptr);
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318 | }
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319 |
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320 | /* Returns presumed mask width in bits or < 0 on error.
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321 | * Updates strp, stores IP at provided pointer */
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322 | static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
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323 | {
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324 | const char *p = *strp;
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325 | int auto_mask = 8;
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326 | unsigned ip = 0;
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327 | int j;
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328 |
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329 | if (*p == '/')
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330 | return -auto_mask;
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331 |
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332 | for (j = 0; j < 4; j++) {
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333 | unsigned octet;
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334 |
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335 | if ((*p < '0' || *p > '9') && *p != '/' && *p)
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336 | return -auto_mask;
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337 | octet = 0;
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338 | while (*p >= '0' && *p <= '9') {
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339 | octet *= 10;
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340 | octet += *p - '0';
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341 | if (octet > 255)
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342 | return -auto_mask;
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343 | p++;
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344 | }
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345 | if (*p == '.')
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346 | p++;
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347 | if (*p != '/' && *p)
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348 | auto_mask += 8;
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349 | ip = (ip << 8) | octet;
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350 | }
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351 | if (*p) {
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352 | if (*p != endc)
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353 | return -auto_mask;
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354 | p++;
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355 | if (*p == '\0')
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356 | return -auto_mask;
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357 | }
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358 | *ipp = ip;
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359 | *strp = p;
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360 | return auto_mask;
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361 | }
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362 |
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363 | /* Returns 0 on success. Stores IP and mask at provided pointers */
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364 | static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
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365 | {
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366 | int i;
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367 | unsigned mask;
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368 | char *p;
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369 |
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370 | i = scan_ip(&str, ipp, '/');
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371 | if (i < 0)
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372 | return i;
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373 |
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374 | if (*str) {
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375 | /* there is /xxx after dotted-IP address */
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376 | i = bb_strtou(str, &p, 10);
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377 | if (*p == '.') {
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378 | /* 'xxx' itself is dotted-IP mask, parse it */
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379 | /* (return 0 (success) only if it has N.N.N.N form) */
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380 | return scan_ip(&str, maskp, '\0') - 32;
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381 | }
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382 | if (*p)
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383 | return -1;
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384 | }
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385 |
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386 | if (i > 32)
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387 | return -1;
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388 |
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389 | if (sizeof(unsigned) == 4 && i == 32) {
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390 | /* mask >>= 32 below may not work */
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391 | mask = 0;
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392 | } else {
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393 | mask = 0xffffffff;
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394 | mask >>= i;
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395 | }
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396 | /* i == 0 -> *maskp = 0x00000000
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397 | * i == 1 -> *maskp = 0x80000000
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398 | * i == 4 -> *maskp = 0xf0000000
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399 | * i == 31 -> *maskp = 0xfffffffe
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400 | * i == 32 -> *maskp = 0xffffffff */
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401 | *maskp = (uint32_t)(~mask);
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402 | return 0;
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403 | }
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404 |
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405 | /*
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406 | * Parse configuration file into in-memory linked list.
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407 | *
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408 | * The first non-white character is examined to determine if the config line
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409 | * is one of the following:
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410 | * .ext:mime/type # new mime type not compiled into httpd
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411 | * [adAD]:from # ip address allow/deny, * for wildcard
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412 | * /path:user:pass # username/password
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413 | * Ennn:error.html # error page for status nnn
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414 | *
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415 | * Any previous IP rules are discarded.
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416 | * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
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417 | * are also discarded. That is, previous settings are retained if flag is
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418 | * SUBDIR_PARSE.
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419 | * Error pages are only parsed on the main config file.
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420 | *
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421 | * path Path where to look for httpd.conf (without filename).
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422 | * flag Type of the parse request.
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423 | */
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424 | /* flag */
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425 | #define FIRST_PARSE 0
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426 | #define SUBDIR_PARSE 1
|
---|
427 | #define SIGNALED_PARSE 2
|
---|
428 | #define FIND_FROM_HTTPD_ROOT 3
|
---|
429 | static void parse_conf(const char *path, int flag)
|
---|
430 | {
|
---|
431 | FILE *f;
|
---|
432 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
433 | Htaccess *prev;
|
---|
434 | #endif
|
---|
435 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
|
---|
436 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
|
---|
437 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
438 | Htaccess *cur;
|
---|
439 | #endif
|
---|
440 | const char *cf = configFile;
|
---|
441 | char buf[160];
|
---|
442 | char *p0 = NULL;
|
---|
443 | char *c, *p;
|
---|
444 | Htaccess_IP *pip;
|
---|
445 |
|
---|
446 | /* discard old rules */
|
---|
447 | free_Htaccess_IP_list(&ip_a_d);
|
---|
448 | flg_deny_all = 0;
|
---|
449 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
|
---|
450 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
|
---|
451 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
452 | /* retain previous auth and mime config only for subdir parse */
|
---|
453 | if (flag != SUBDIR_PARSE) {
|
---|
454 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
455 | free_Htaccess_list(&g_auth);
|
---|
456 | #endif
|
---|
457 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
---|
458 | free_Htaccess_list(&mime_a);
|
---|
459 | #endif
|
---|
460 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
461 | free_Htaccess_list(&script_i);
|
---|
462 | #endif
|
---|
463 | }
|
---|
464 | #endif
|
---|
465 |
|
---|
466 | if (flag == SUBDIR_PARSE || cf == NULL) {
|
---|
467 | cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
|
---|
468 | sprintf((char *)cf, "%s/%s", path, httpd_conf);
|
---|
469 | }
|
---|
470 |
|
---|
471 | while ((f = fopen(cf, "r")) == NULL) {
|
---|
472 | if (flag == SUBDIR_PARSE || flag == FIND_FROM_HTTPD_ROOT) {
|
---|
473 | /* config file not found, no changes to config */
|
---|
474 | return;
|
---|
475 | }
|
---|
476 | if (configFile && flag == FIRST_PARSE) /* if -c option given */
|
---|
477 | bb_perror_msg_and_die("%s", cf);
|
---|
478 | flag = FIND_FROM_HTTPD_ROOT;
|
---|
479 | cf = httpd_conf;
|
---|
480 | }
|
---|
481 |
|
---|
482 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
483 | prev = g_auth;
|
---|
484 | #endif
|
---|
485 | /* This could stand some work */
|
---|
486 | while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
|
---|
487 | c = NULL;
|
---|
488 | for (p = p0; *p0 != '\0' && *p0 != '#'; p0++) {
|
---|
489 | if (!isspace(*p0)) {
|
---|
490 | *p++ = *p0;
|
---|
491 | if (*p0 == ':' && c == NULL)
|
---|
492 | c = p;
|
---|
493 | }
|
---|
494 | }
|
---|
495 | *p = '\0';
|
---|
496 |
|
---|
497 | /* test for empty or strange line */
|
---|
498 | if (c == NULL || *c == '\0')
|
---|
499 | continue;
|
---|
500 | p0 = buf;
|
---|
501 | if (*p0 == 'd')
|
---|
502 | *p0 = 'D';
|
---|
503 | if (*c == '*') {
|
---|
504 | if (*p0 == 'D') {
|
---|
505 | /* memorize deny all */
|
---|
506 | flg_deny_all = 1;
|
---|
507 | }
|
---|
508 | /* skip default other "word:*" config lines */
|
---|
509 | continue;
|
---|
510 | }
|
---|
511 |
|
---|
512 | if (*p0 == 'a')
|
---|
513 | *p0 = 'A';
|
---|
514 | if (*p0 == 'A' || *p0 == 'D') {
|
---|
515 | /* storing current config IP line */
|
---|
516 | pip = xzalloc(sizeof(Htaccess_IP));
|
---|
517 | if (pip) {
|
---|
518 | if (scan_ip_mask(c, &(pip->ip), &(pip->mask))) {
|
---|
519 | /* syntax IP{/mask} error detected, protect all */
|
---|
520 | *p0 = 'D';
|
---|
521 | pip->mask = 0;
|
---|
522 | }
|
---|
523 | pip->allow_deny = *p0;
|
---|
524 | if (*p0 == 'D') {
|
---|
525 | /* Deny:from_IP move top */
|
---|
526 | pip->next = ip_a_d;
|
---|
527 | ip_a_d = pip;
|
---|
528 | } else {
|
---|
529 | /* add to bottom A:form_IP config line */
|
---|
530 | Htaccess_IP *prev_IP = ip_a_d;
|
---|
531 |
|
---|
532 | if (prev_IP == NULL) {
|
---|
533 | ip_a_d = pip;
|
---|
534 | } else {
|
---|
535 | while (prev_IP->next)
|
---|
536 | prev_IP = prev_IP->next;
|
---|
537 | prev_IP->next = pip;
|
---|
538 | }
|
---|
539 | }
|
---|
540 | }
|
---|
541 | continue;
|
---|
542 | }
|
---|
543 |
|
---|
544 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
545 | if (flag == FIRST_PARSE && *p0 == 'E') {
|
---|
546 | int i;
|
---|
547 | /* error status code */
|
---|
548 | int status = atoi(++p0);
|
---|
549 | /* c already points at the character following ':' in parse loop */
|
---|
550 | /* c = strchr(p0, ':'); c++; */
|
---|
551 | if (status < HTTP_CONTINUE) {
|
---|
552 | bb_error_msg("config error '%s' in '%s'", buf, cf);
|
---|
553 | continue;
|
---|
554 | }
|
---|
555 |
|
---|
556 | /* then error page; find matching status */
|
---|
557 | for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
---|
558 | if (http_response_type[i] == status) {
|
---|
559 | http_error_page[i] = concat_path_file((*c == '/') ? NULL : home_httpd, c);
|
---|
560 | break;
|
---|
561 | }
|
---|
562 | }
|
---|
563 | continue;
|
---|
564 | }
|
---|
565 | #endif
|
---|
566 |
|
---|
567 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
568 | if (*p0 == '/') {
|
---|
569 | /* make full path from httpd root / current_path / config_line_path */
|
---|
570 | cf = (flag == SUBDIR_PARSE ? path : "");
|
---|
571 | p0 = xmalloc(strlen(cf) + (c - buf) + 2 + strlen(c));
|
---|
572 | c[-1] = '\0';
|
---|
573 | sprintf(p0, "/%s%s", cf, buf);
|
---|
574 |
|
---|
575 | /* another call bb_simplify_path */
|
---|
576 | cf = p = p0;
|
---|
577 |
|
---|
578 | do {
|
---|
579 | if (*p == '/') {
|
---|
580 | if (*cf == '/') { /* skip duplicate (or initial) slash */
|
---|
581 | continue;
|
---|
582 | } else if (*cf == '.') {
|
---|
583 | if (cf[1] == '/' || cf[1] == '\0') { /* remove extra '.' */
|
---|
584 | continue;
|
---|
585 | } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == '\0')) {
|
---|
586 | ++cf;
|
---|
587 | if (p > p0) {
|
---|
588 | while (*--p != '/') /* omit previous dir */;
|
---|
589 | }
|
---|
590 | continue;
|
---|
591 | }
|
---|
592 | }
|
---|
593 | }
|
---|
594 | *++p = *cf;
|
---|
595 | } while (*++cf);
|
---|
596 |
|
---|
597 | if ((p == p0) || (*p != '/')) { /* not a trailing slash */
|
---|
598 | ++p; /* so keep last character */
|
---|
599 | }
|
---|
600 | *p = '\0';
|
---|
601 | sprintf(p0 + strlen(p0), ":%s", c);
|
---|
602 | }
|
---|
603 | #endif
|
---|
604 |
|
---|
605 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
|
---|
606 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
|
---|
607 | || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
608 | /* storing current config line */
|
---|
609 | cur = xzalloc(sizeof(Htaccess) + strlen(p0));
|
---|
610 | if (cur) {
|
---|
611 | cf = strcpy(cur->before_colon, p0);
|
---|
612 | c = strchr(cf, ':');
|
---|
613 | *c++ = 0;
|
---|
614 | cur->after_colon = c;
|
---|
615 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
---|
616 | if (*cf == '.') {
|
---|
617 | /* config .mime line move top for overwrite previous */
|
---|
618 | cur->next = mime_a;
|
---|
619 | mime_a = cur;
|
---|
620 | continue;
|
---|
621 | }
|
---|
622 | #endif
|
---|
623 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
624 | if (*cf == '*' && cf[1] == '.') {
|
---|
625 | /* config script interpreter line move top for overwrite previous */
|
---|
626 | cur->next = script_i;
|
---|
627 | script_i = cur;
|
---|
628 | continue;
|
---|
629 | }
|
---|
630 | #endif
|
---|
631 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
632 | free(p0);
|
---|
633 | if (prev == NULL) {
|
---|
634 | /* first line */
|
---|
635 | g_auth = prev = cur;
|
---|
636 | } else {
|
---|
637 | /* sort path, if current lenght eq or bigger then move up */
|
---|
638 | Htaccess *prev_hti = g_auth;
|
---|
639 | size_t l = strlen(cf);
|
---|
640 | Htaccess *hti;
|
---|
641 |
|
---|
642 | for (hti = prev_hti; hti; hti = hti->next) {
|
---|
643 | if (l >= strlen(hti->before_colon)) {
|
---|
644 | /* insert before hti */
|
---|
645 | cur->next = hti;
|
---|
646 | if (prev_hti != hti) {
|
---|
647 | prev_hti->next = cur;
|
---|
648 | } else {
|
---|
649 | /* insert as top */
|
---|
650 | g_auth = cur;
|
---|
651 | }
|
---|
652 | break;
|
---|
653 | }
|
---|
654 | if (prev_hti != hti)
|
---|
655 | prev_hti = prev_hti->next;
|
---|
656 | }
|
---|
657 | if (!hti) { /* not inserted, add to bottom */
|
---|
658 | prev->next = cur;
|
---|
659 | prev = cur;
|
---|
660 | }
|
---|
661 | }
|
---|
662 | #endif
|
---|
663 | }
|
---|
664 | #endif
|
---|
665 | }
|
---|
666 | fclose(f);
|
---|
667 | }
|
---|
668 |
|
---|
669 | #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
---|
670 | /*
|
---|
671 | * Given a string, html-encode special characters.
|
---|
672 | * This is used for the -e command line option to provide an easy way
|
---|
673 | * for scripts to encode result data without confusing browsers. The
|
---|
674 | * returned string pointer is memory allocated by malloc().
|
---|
675 | *
|
---|
676 | * Returns a pointer to the encoded string (malloced).
|
---|
677 | */
|
---|
678 | static char *encodeString(const char *string)
|
---|
679 | {
|
---|
680 | /* take the simple route and encode everything */
|
---|
681 | /* could possibly scan once to get length. */
|
---|
682 | int len = strlen(string);
|
---|
683 | char *out = xmalloc(len * 6 + 1);
|
---|
684 | char *p = out;
|
---|
685 | char ch;
|
---|
686 |
|
---|
687 | while ((ch = *string++)) {
|
---|
688 | /* very simple check for what to encode */
|
---|
689 | if (isalnum(ch))
|
---|
690 | *p++ = ch;
|
---|
691 | else
|
---|
692 | p += sprintf(p, "&#%d;", (unsigned char) ch);
|
---|
693 | }
|
---|
694 | *p = '\0';
|
---|
695 | return out;
|
---|
696 | }
|
---|
697 | #endif /* FEATURE_HTTPD_ENCODE_URL_STR */
|
---|
698 |
|
---|
699 | /*
|
---|
700 | * Given a URL encoded string, convert it to plain ascii.
|
---|
701 | * Since decoding always makes strings smaller, the decode is done in-place.
|
---|
702 | * Thus, callers should strdup() the argument if they do not want the
|
---|
703 | * argument modified. The return is the original pointer, allowing this
|
---|
704 | * function to be easily used as arguments to other functions.
|
---|
705 | *
|
---|
706 | * string The first string to decode.
|
---|
707 | * option_d 1 if called for httpd -d
|
---|
708 | *
|
---|
709 | * Returns a pointer to the decoded string (same as input).
|
---|
710 | */
|
---|
711 | static unsigned hex_to_bin(unsigned char c)
|
---|
712 | {
|
---|
713 | unsigned v;
|
---|
714 |
|
---|
715 | v = c - '0';
|
---|
716 | if (v <= 9)
|
---|
717 | return v;
|
---|
718 | /* c | 0x20: letters to lower case, non-letters
|
---|
719 | * to (potentially different) non-letters */
|
---|
720 | v = (unsigned)(c | 0x20) - 'a';
|
---|
721 | if (v <= 5)
|
---|
722 | return v + 10;
|
---|
723 | return ~0;
|
---|
724 | }
|
---|
725 | /* For testing:
|
---|
726 | void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
|
---|
727 | int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
|
---|
728 | t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
|
---|
729 | */
|
---|
730 | static char *decodeString(char *orig, int option_d)
|
---|
731 | {
|
---|
732 | /* note that decoded string is always shorter than original */
|
---|
733 | char *string = orig;
|
---|
734 | char *ptr = string;
|
---|
735 | char c;
|
---|
736 |
|
---|
737 | while ((c = *ptr++) != '\0') {
|
---|
738 | unsigned v;
|
---|
739 |
|
---|
740 | if (option_d && c == '+') {
|
---|
741 | *string++ = ' ';
|
---|
742 | continue;
|
---|
743 | }
|
---|
744 | if (c != '%') {
|
---|
745 | *string++ = c;
|
---|
746 | continue;
|
---|
747 | }
|
---|
748 | v = hex_to_bin(ptr[0]);
|
---|
749 | if (v > 15) {
|
---|
750 | bad_hex:
|
---|
751 | if (!option_d)
|
---|
752 | return NULL;
|
---|
753 | *string++ = '%';
|
---|
754 | continue;
|
---|
755 | }
|
---|
756 | v = (v * 16) | hex_to_bin(ptr[1]);
|
---|
757 | if (v > 255)
|
---|
758 | goto bad_hex;
|
---|
759 | if (!option_d && (v == '/' || v == '\0')) {
|
---|
760 | /* caller takes it as indication of invalid
|
---|
761 | * (dangerous wrt exploits) chars */
|
---|
762 | return orig + 1;
|
---|
763 | }
|
---|
764 | *string++ = v;
|
---|
765 | ptr += 2;
|
---|
766 | }
|
---|
767 | *string = '\0';
|
---|
768 | return orig;
|
---|
769 | }
|
---|
770 |
|
---|
771 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
772 | /*
|
---|
773 | * Decode a base64 data stream as per rfc1521.
|
---|
774 | * Note that the rfc states that non base64 chars are to be ignored.
|
---|
775 | * Since the decode always results in a shorter size than the input,
|
---|
776 | * it is OK to pass the input arg as an output arg.
|
---|
777 | * Parameter: a pointer to a base64 encoded string.
|
---|
778 | * Decoded data is stored in-place.
|
---|
779 | */
|
---|
780 | static void decodeBase64(char *Data)
|
---|
781 | {
|
---|
782 | const unsigned char *in = (const unsigned char *)Data;
|
---|
783 | /* The decoded size will be at most 3/4 the size of the encoded */
|
---|
784 | unsigned ch = 0;
|
---|
785 | int i = 0;
|
---|
786 |
|
---|
787 | while (*in) {
|
---|
788 | int t = *in++;
|
---|
789 |
|
---|
790 | if (t >= '0' && t <= '9')
|
---|
791 | t = t - '0' + 52;
|
---|
792 | else if (t >= 'A' && t <= 'Z')
|
---|
793 | t = t - 'A';
|
---|
794 | else if (t >= 'a' && t <= 'z')
|
---|
795 | t = t - 'a' + 26;
|
---|
796 | else if (t == '+')
|
---|
797 | t = 62;
|
---|
798 | else if (t == '/')
|
---|
799 | t = 63;
|
---|
800 | else if (t == '=')
|
---|
801 | t = 0;
|
---|
802 | else
|
---|
803 | continue;
|
---|
804 |
|
---|
805 | ch = (ch << 6) | t;
|
---|
806 | i++;
|
---|
807 | if (i == 4) {
|
---|
808 | *Data++ = (char) (ch >> 16);
|
---|
809 | *Data++ = (char) (ch >> 8);
|
---|
810 | *Data++ = (char) ch;
|
---|
811 | i = 0;
|
---|
812 | }
|
---|
813 | }
|
---|
814 | *Data = '\0';
|
---|
815 | }
|
---|
816 | #endif
|
---|
817 |
|
---|
818 | /*
|
---|
819 | * Create a listen server socket on the designated port.
|
---|
820 | */
|
---|
821 | static int openServer(void)
|
---|
822 | {
|
---|
823 | int n = bb_strtou(bind_addr_or_port, NULL, 10);
|
---|
824 | if (!errno && n && n <= 0xffff)
|
---|
825 | n = create_and_bind_stream_or_die(NULL, n);
|
---|
826 | else
|
---|
827 | n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
|
---|
828 | xlisten(n, 9);
|
---|
829 | return n;
|
---|
830 | }
|
---|
831 |
|
---|
832 | /*
|
---|
833 | * Log the connection closure and exit.
|
---|
834 | */
|
---|
835 | static void log_and_exit(void) ATTRIBUTE_NORETURN;
|
---|
836 | static void log_and_exit(void)
|
---|
837 | {
|
---|
838 | /* Paranoia. IE said to be buggy. It may send some extra data
|
---|
839 | * or be confused by us just exiting without SHUT_WR. Oh well. */
|
---|
840 | shutdown(1, SHUT_WR);
|
---|
841 | ndelay_on(0);
|
---|
842 | while (read(0, iobuf, IOBUF_SIZE) > 0)
|
---|
843 | continue;
|
---|
844 |
|
---|
845 | if (verbose > 2)
|
---|
846 | bb_error_msg("closed");
|
---|
847 | _exit(xfunc_error_retval);
|
---|
848 | }
|
---|
849 |
|
---|
850 | /*
|
---|
851 | * Create and send HTTP response headers.
|
---|
852 | * The arguments are combined and sent as one write operation. Note that
|
---|
853 | * IE will puke big-time if the headers are not sent in one packet and the
|
---|
854 | * second packet is delayed for any reason.
|
---|
855 | * responseNum - the result code to send.
|
---|
856 | */
|
---|
857 | static void send_headers(int responseNum)
|
---|
858 | {
|
---|
859 | static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
|
---|
860 |
|
---|
861 | const char *responseString = "";
|
---|
862 | const char *infoString = NULL;
|
---|
863 | const char *mime_type;
|
---|
864 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
865 | const char *error_page = 0;
|
---|
866 | #endif
|
---|
867 | unsigned i;
|
---|
868 | time_t timer = time(0);
|
---|
869 | char tmp_str[80];
|
---|
870 | int len;
|
---|
871 |
|
---|
872 | for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
---|
873 | if (http_response_type[i] == responseNum) {
|
---|
874 | responseString = http_response[i].name;
|
---|
875 | infoString = http_response[i].info;
|
---|
876 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
877 | error_page = http_error_page[i];
|
---|
878 | #endif
|
---|
879 | break;
|
---|
880 | }
|
---|
881 | }
|
---|
882 | /* error message is HTML */
|
---|
883 | mime_type = responseNum == HTTP_OK ?
|
---|
884 | found_mime_type : "text/html";
|
---|
885 |
|
---|
886 | if (verbose)
|
---|
887 | bb_error_msg("response:%u", responseNum);
|
---|
888 |
|
---|
889 | /* emit the current date */
|
---|
890 | strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
|
---|
891 | len = sprintf(iobuf,
|
---|
892 | "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
|
---|
893 | "Date: %s\r\nConnection: close\r\n",
|
---|
894 | responseNum, responseString, mime_type, tmp_str);
|
---|
895 |
|
---|
896 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
897 | if (responseNum == HTTP_UNAUTHORIZED) {
|
---|
898 | len += sprintf(iobuf + len,
|
---|
899 | "WWW-Authenticate: Basic realm=\"%s\"\r\n",
|
---|
900 | g_realm);
|
---|
901 | }
|
---|
902 | #endif
|
---|
903 | if (responseNum == HTTP_MOVED_TEMPORARILY) {
|
---|
904 | len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
|
---|
905 | found_moved_temporarily,
|
---|
906 | (g_query ? "?" : ""),
|
---|
907 | (g_query ? g_query : ""));
|
---|
908 | }
|
---|
909 |
|
---|
910 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
911 | if (error_page && !access(error_page, R_OK)) {
|
---|
912 | strcat(iobuf, "\r\n");
|
---|
913 | len += 2;
|
---|
914 |
|
---|
915 | if (DEBUG)
|
---|
916 | fprintf(stderr, "headers: '%s'\n", iobuf);
|
---|
917 | full_write(1, iobuf, len);
|
---|
918 | if (DEBUG)
|
---|
919 | fprintf(stderr, "writing error page: '%s'\n", error_page);
|
---|
920 | return send_file_and_exit(error_page, FALSE);
|
---|
921 | }
|
---|
922 | #endif
|
---|
923 |
|
---|
924 | if (ContentLength != -1) { /* file */
|
---|
925 | strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
|
---|
926 | len += sprintf(iobuf + len, "Last-Modified: %s\r\n%s %"OFF_FMT"d\r\n",
|
---|
927 | tmp_str, "Content-length:", ContentLength);
|
---|
928 | }
|
---|
929 | iobuf[len++] = '\r';
|
---|
930 | iobuf[len++] = '\n';
|
---|
931 | if (infoString) {
|
---|
932 | len += sprintf(iobuf + len,
|
---|
933 | "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
|
---|
934 | "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
|
---|
935 | responseNum, responseString,
|
---|
936 | responseNum, responseString, infoString);
|
---|
937 | }
|
---|
938 | if (DEBUG)
|
---|
939 | fprintf(stderr, "headers: '%s'\n", iobuf);
|
---|
940 | if (full_write(1, iobuf, len) != len) {
|
---|
941 | if (verbose > 1)
|
---|
942 | bb_perror_msg("error");
|
---|
943 | log_and_exit();
|
---|
944 | }
|
---|
945 | }
|
---|
946 |
|
---|
947 | static void send_headers_and_exit(int responseNum) ATTRIBUTE_NORETURN;
|
---|
948 | static void send_headers_and_exit(int responseNum)
|
---|
949 | {
|
---|
950 | send_headers(responseNum);
|
---|
951 | log_and_exit();
|
---|
952 | }
|
---|
953 |
|
---|
954 | /*
|
---|
955 | * Read from the socket until '\n' or EOF. '\r' chars are removed.
|
---|
956 | * '\n' is replaced with NUL.
|
---|
957 | * Return number of characters read or 0 if nothing is read
|
---|
958 | * ('\r' and '\n' are not counted).
|
---|
959 | * Data is returned in iobuf.
|
---|
960 | */
|
---|
961 | static int get_line(void)
|
---|
962 | {
|
---|
963 | int count = 0;
|
---|
964 | char c;
|
---|
965 |
|
---|
966 | while (1) {
|
---|
967 | if (hdr_cnt <= 0) {
|
---|
968 | hdr_cnt = safe_read(0, hdr_buf, sizeof(hdr_buf));
|
---|
969 | if (hdr_cnt <= 0)
|
---|
970 | break;
|
---|
971 | hdr_ptr = hdr_buf;
|
---|
972 | }
|
---|
973 | iobuf[count] = c = *hdr_ptr++;
|
---|
974 | hdr_cnt--;
|
---|
975 |
|
---|
976 | if (c == '\r')
|
---|
977 | continue;
|
---|
978 | if (c == '\n') {
|
---|
979 | iobuf[count] = '\0';
|
---|
980 | return count;
|
---|
981 | }
|
---|
982 | if (count < (IOBUF_SIZE - 1)) /* check overflow */
|
---|
983 | count++;
|
---|
984 | }
|
---|
985 | return count;
|
---|
986 | }
|
---|
987 |
|
---|
988 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
989 | static void setenv1(const char *name, const char *value)
|
---|
990 | {
|
---|
991 | setenv(name, value ? value : "", 1);
|
---|
992 | }
|
---|
993 |
|
---|
994 | /*
|
---|
995 | * Spawn CGI script, forward CGI's stdin/out <=> network
|
---|
996 | *
|
---|
997 | * Environment variables are set up and the script is invoked with pipes
|
---|
998 | * for stdin/stdout. If a post is being done the script is fed the POST
|
---|
999 | * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
|
---|
1000 | *
|
---|
1001 | * Parameters:
|
---|
1002 | * const char *url The requested URL (with leading /).
|
---|
1003 | * int bodyLen Length of the post body.
|
---|
1004 | * const char *cookie For set HTTP_COOKIE.
|
---|
1005 | * const char *content_type For set CONTENT_TYPE.
|
---|
1006 | */
|
---|
1007 | static void send_cgi_and_exit(
|
---|
1008 | const char *url,
|
---|
1009 | const char *request,
|
---|
1010 | int bodyLen,
|
---|
1011 | const char *cookie,
|
---|
1012 | const char *content_type) ATTRIBUTE_NORETURN;
|
---|
1013 | static void send_cgi_and_exit(
|
---|
1014 | const char *url,
|
---|
1015 | const char *request,
|
---|
1016 | int bodyLen,
|
---|
1017 | const char *cookie,
|
---|
1018 | const char *content_type)
|
---|
1019 | {
|
---|
1020 | struct { int rd; int wr; } fromCgi; /* CGI -> httpd pipe */
|
---|
1021 | struct { int rd; int wr; } toCgi; /* httpd -> CGI pipe */
|
---|
1022 | char *fullpath;
|
---|
1023 | char *script;
|
---|
1024 | char *purl;
|
---|
1025 | int buf_count;
|
---|
1026 | int status;
|
---|
1027 | int pid = 0;
|
---|
1028 |
|
---|
1029 | /*
|
---|
1030 | * We are mucking with environment _first_ and then vfork/exec,
|
---|
1031 | * this allows us to use vfork safely. Parent don't care about
|
---|
1032 | * these environment changes anyway.
|
---|
1033 | */
|
---|
1034 |
|
---|
1035 | /*
|
---|
1036 | * Find PATH_INFO.
|
---|
1037 | */
|
---|
1038 | purl = xstrdup(url);
|
---|
1039 | script = purl;
|
---|
1040 | while ((script = strchr(script + 1, '/')) != NULL) {
|
---|
1041 | /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
|
---|
1042 | struct stat sb;
|
---|
1043 |
|
---|
1044 | *script = '\0';
|
---|
1045 | if (!is_directory(purl + 1, 1, &sb)) {
|
---|
1046 | /* not directory, found script.cgi/PATH_INFO */
|
---|
1047 | *script = '/';
|
---|
1048 | break;
|
---|
1049 | }
|
---|
1050 | *script = '/'; /* is directory, find next '/' */
|
---|
1051 | }
|
---|
1052 | setenv1("PATH_INFO", script); /* set /PATH_INFO or "" */
|
---|
1053 | setenv1("REQUEST_METHOD", request);
|
---|
1054 | if (g_query) {
|
---|
1055 | putenv(xasprintf("%s=%s?%s", "REQUEST_URI", purl, g_query));
|
---|
1056 | } else {
|
---|
1057 | setenv1("REQUEST_URI", purl);
|
---|
1058 | }
|
---|
1059 | if (script != NULL)
|
---|
1060 | *script = '\0'; /* cut off /PATH_INFO */
|
---|
1061 |
|
---|
1062 | /* SCRIPT_FILENAME required by PHP in CGI mode */
|
---|
1063 | fullpath = concat_path_file(home_httpd, purl);
|
---|
1064 | setenv1("SCRIPT_FILENAME", fullpath);
|
---|
1065 | /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
|
---|
1066 | setenv1("SCRIPT_NAME", purl);
|
---|
1067 | /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
|
---|
1068 | * QUERY_STRING: The information which follows the ? in the URL
|
---|
1069 | * which referenced this script. This is the query information.
|
---|
1070 | * It should not be decoded in any fashion. This variable
|
---|
1071 | * should always be set when there is query information,
|
---|
1072 | * regardless of command line decoding. */
|
---|
1073 | /* (Older versions of bbox seem to do some decoding) */
|
---|
1074 | setenv1("QUERY_STRING", g_query);
|
---|
1075 | putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
|
---|
1076 | putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
|
---|
1077 | putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
|
---|
1078 | /* Having _separate_ variables for IP and port defeats
|
---|
1079 | * the purpose of having socket abstraction. Which "port"
|
---|
1080 | * are you using on Unix domain socket?
|
---|
1081 | * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
|
---|
1082 | * Oh well... */
|
---|
1083 | {
|
---|
1084 | char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
|
---|
1085 | char *cp = strrchr(p, ':');
|
---|
1086 | if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
|
---|
1087 | cp = NULL;
|
---|
1088 | if (cp) *cp = '\0'; /* delete :PORT */
|
---|
1089 | setenv1("REMOTE_ADDR", p);
|
---|
1090 | if (cp) {
|
---|
1091 | *cp = ':';
|
---|
1092 | #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
|
---|
1093 | setenv1("REMOTE_PORT", cp + 1);
|
---|
1094 | #endif
|
---|
1095 | }
|
---|
1096 | }
|
---|
1097 | setenv1("HTTP_USER_AGENT", user_agent);
|
---|
1098 | if (bodyLen)
|
---|
1099 | putenv(xasprintf("CONTENT_LENGTH=%d", bodyLen));
|
---|
1100 | if (cookie)
|
---|
1101 | setenv1("HTTP_COOKIE", cookie);
|
---|
1102 | if (content_type)
|
---|
1103 | setenv1("CONTENT_TYPE", content_type);
|
---|
1104 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
1105 | if (remoteuser) {
|
---|
1106 | setenv1("REMOTE_USER", remoteuser);
|
---|
1107 | putenv((char*)"AUTH_TYPE=Basic");
|
---|
1108 | }
|
---|
1109 | #endif
|
---|
1110 | if (referer)
|
---|
1111 | setenv1("HTTP_REFERER", referer);
|
---|
1112 |
|
---|
1113 | xpipe(&fromCgi.rd);
|
---|
1114 | xpipe(&toCgi.rd);
|
---|
1115 |
|
---|
1116 | pid = vfork();
|
---|
1117 | if (pid < 0) {
|
---|
1118 | /* TODO: log perror? */
|
---|
1119 | log_and_exit();
|
---|
1120 | }
|
---|
1121 |
|
---|
1122 | if (!pid) {
|
---|
1123 | /* Child process */
|
---|
1124 | xfunc_error_retval = 242;
|
---|
1125 |
|
---|
1126 | xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
|
---|
1127 | xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
|
---|
1128 | close(fromCgi.rd);
|
---|
1129 | close(toCgi.wr);
|
---|
1130 | /* User seeing stderr output can be a security problem.
|
---|
1131 | * If CGI really wants that, it can always do dup itself. */
|
---|
1132 | /* dup2(1, 2); */
|
---|
1133 |
|
---|
1134 | /* script must have absolute path */
|
---|
1135 | script = strrchr(fullpath, '/');
|
---|
1136 | if (!script)
|
---|
1137 | goto error_execing_cgi;
|
---|
1138 | *script = '\0';
|
---|
1139 | /* chdiring to script's dir */
|
---|
1140 | if (chdir(fullpath) == 0) {
|
---|
1141 | char *argv[2];
|
---|
1142 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
1143 | char *interpr = NULL;
|
---|
1144 | char *suffix = strrchr(purl, '.');
|
---|
1145 |
|
---|
1146 | if (suffix) {
|
---|
1147 | Htaccess *cur;
|
---|
1148 | for (cur = script_i; cur; cur = cur->next) {
|
---|
1149 | if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
---|
1150 | interpr = cur->after_colon;
|
---|
1151 | break;
|
---|
1152 | }
|
---|
1153 | }
|
---|
1154 | }
|
---|
1155 | #endif
|
---|
1156 | *script = '/';
|
---|
1157 | /* set argv[0] to name without path */
|
---|
1158 | argv[0] = (char*)bb_basename(purl);
|
---|
1159 | argv[1] = NULL;
|
---|
1160 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
1161 | if (interpr)
|
---|
1162 | execv(interpr, argv);
|
---|
1163 | else
|
---|
1164 | #endif
|
---|
1165 | execv(fullpath, argv);
|
---|
1166 | }
|
---|
1167 | error_execing_cgi:
|
---|
1168 | /* send to stdout
|
---|
1169 | * (we are CGI here, our stdout is pumped to the net) */
|
---|
1170 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
1171 | } /* end child */
|
---|
1172 |
|
---|
1173 | /* Parent process */
|
---|
1174 |
|
---|
1175 | /* First, restore variables possibly changed by child */
|
---|
1176 | xfunc_error_retval = 0;
|
---|
1177 |
|
---|
1178 | /* Prepare for pumping data.
|
---|
1179 | * iobuf is used for CGI -> network data,
|
---|
1180 | * hdr_buf is for network -> CGI data (POSTDATA) */
|
---|
1181 | buf_count = 0;
|
---|
1182 | close(fromCgi.wr);
|
---|
1183 | close(toCgi.rd);
|
---|
1184 |
|
---|
1185 | /* If CGI dies, we still want to correctly finish reading its output
|
---|
1186 | * and send it to the peer. So please no SIGPIPEs! */
|
---|
1187 | signal(SIGPIPE, SIG_IGN);
|
---|
1188 |
|
---|
1189 | /* Accound for POSTDATA already in hdr_buf */
|
---|
1190 | bodyLen -= hdr_cnt;
|
---|
1191 |
|
---|
1192 | /* This loop still looks messy. What is an exit criteria?
|
---|
1193 | * "CGI's output closed"? Or "CGI has exited"?
|
---|
1194 | * What to do if CGI has closed both input and output, but
|
---|
1195 | * didn't exit? etc... */
|
---|
1196 |
|
---|
1197 | /* NB: breaking out of this loop jumps to log_and_exit() */
|
---|
1198 | while (1) {
|
---|
1199 | fd_set readSet;
|
---|
1200 | fd_set writeSet;
|
---|
1201 | int nfound;
|
---|
1202 | int count;
|
---|
1203 |
|
---|
1204 | FD_ZERO(&readSet);
|
---|
1205 | FD_ZERO(&writeSet);
|
---|
1206 | FD_SET(fromCgi.rd, &readSet);
|
---|
1207 | if (bodyLen > 0 || hdr_cnt > 0) {
|
---|
1208 | FD_SET(toCgi.wr, &writeSet);
|
---|
1209 | nfound = toCgi.wr > fromCgi.rd ? toCgi.wr : fromCgi.rd;
|
---|
1210 | if (hdr_cnt <= 0)
|
---|
1211 | FD_SET(0, &readSet);
|
---|
1212 | /* Now wait on the set of sockets! */
|
---|
1213 | nfound = select(nfound + 1, &readSet, &writeSet, NULL, NULL);
|
---|
1214 | } else {
|
---|
1215 | if (!bodyLen) {
|
---|
1216 | close(toCgi.wr); /* no more POST data to CGI */
|
---|
1217 | bodyLen = -1;
|
---|
1218 | }
|
---|
1219 | nfound = select(fromCgi.rd + 1, &readSet, NULL, NULL, NULL);
|
---|
1220 | }
|
---|
1221 |
|
---|
1222 | if (nfound <= 0) {
|
---|
1223 | if (waitpid(pid, &status, WNOHANG) <= 0) {
|
---|
1224 | /* Weird. CGI didn't exit and no fd's
|
---|
1225 | * are ready, yet select returned?! */
|
---|
1226 | continue;
|
---|
1227 | }
|
---|
1228 | close(fromCgi.rd);
|
---|
1229 | if (DEBUG && WIFEXITED(status))
|
---|
1230 | bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
|
---|
1231 | if (DEBUG && WIFSIGNALED(status))
|
---|
1232 | bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
|
---|
1233 | break;
|
---|
1234 | }
|
---|
1235 |
|
---|
1236 | if (hdr_cnt > 0 && FD_ISSET(toCgi.wr, &writeSet)) {
|
---|
1237 | /* Have data from peer and can write to CGI */
|
---|
1238 | count = safe_write(toCgi.wr, hdr_ptr, hdr_cnt);
|
---|
1239 | /* Doesn't happen, we dont use nonblocking IO here
|
---|
1240 | *if (count < 0 && errno == EAGAIN) {
|
---|
1241 | * ...
|
---|
1242 | *} else */
|
---|
1243 | if (count > 0) {
|
---|
1244 | hdr_ptr += count;
|
---|
1245 | hdr_cnt -= count;
|
---|
1246 | } else {
|
---|
1247 | hdr_cnt = bodyLen = 0; /* EOF/broken pipe to CGI */
|
---|
1248 | }
|
---|
1249 | } else if (bodyLen > 0 && hdr_cnt == 0
|
---|
1250 | && FD_ISSET(0, &readSet)
|
---|
1251 | ) {
|
---|
1252 | /* We expect data, prev data portion is eaten by CGI
|
---|
1253 | * and there *is* data to read from the peer
|
---|
1254 | * (POSTDATA?) */
|
---|
1255 | count = bodyLen > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : bodyLen;
|
---|
1256 | count = safe_read(0, hdr_buf, count);
|
---|
1257 | if (count > 0) {
|
---|
1258 | hdr_cnt = count;
|
---|
1259 | hdr_ptr = hdr_buf;
|
---|
1260 | bodyLen -= count;
|
---|
1261 | } else {
|
---|
1262 | bodyLen = 0; /* closed */
|
---|
1263 | }
|
---|
1264 | }
|
---|
1265 |
|
---|
1266 | #define PIPESIZE PIPE_BUF
|
---|
1267 | #if PIPESIZE >= IOBUF_SIZE
|
---|
1268 | # error "PIPESIZE >= IOBUF_SIZE"
|
---|
1269 | #endif
|
---|
1270 | if (FD_ISSET(fromCgi.rd, &readSet)) {
|
---|
1271 | /* There is something to read from CGI */
|
---|
1272 | char *rbuf = iobuf;
|
---|
1273 |
|
---|
1274 | /* Are we still buffering CGI output? */
|
---|
1275 | if (buf_count >= 0) {
|
---|
1276 | /* HTTP_200[] has single "\r\n" at the end.
|
---|
1277 | * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
|
---|
1278 | * CGI scripts MUST send their own header terminated by
|
---|
1279 | * empty line, then data. That's why we have only one
|
---|
1280 | * <cr><lf> pair here. We will output "200 OK" line
|
---|
1281 | * if needed, but CGI still has to provide blank line
|
---|
1282 | * between header and body */
|
---|
1283 |
|
---|
1284 | /* Must use safe_read, not full_read, because
|
---|
1285 | * CGI may output a few first bytes and then wait
|
---|
1286 | * for POSTDATA without closing stdout.
|
---|
1287 | * With full_read we may wait here forever. */
|
---|
1288 | count = safe_read(fromCgi.rd, rbuf + buf_count, PIPESIZE - 8);
|
---|
1289 | if (count <= 0) {
|
---|
1290 | /* eof (or error) and there was no "HTTP",
|
---|
1291 | * so write it, then write received data */
|
---|
1292 | if (buf_count) {
|
---|
1293 | full_write(1, HTTP_200, sizeof(HTTP_200)-1);
|
---|
1294 | full_write(1, rbuf, buf_count);
|
---|
1295 | }
|
---|
1296 | break; /* CGI stdout is closed, exiting */
|
---|
1297 | }
|
---|
1298 | buf_count += count;
|
---|
1299 | count = 0;
|
---|
1300 | /* "Status" header format is: "Status: 302 Redirected\r\n" */
|
---|
1301 | if (buf_count >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
|
---|
1302 | /* send "HTTP/1.0 " */
|
---|
1303 | if (full_write(1, HTTP_200, 9) != 9)
|
---|
1304 | break;
|
---|
1305 | rbuf += 8; /* skip "Status: " */
|
---|
1306 | count = buf_count - 8;
|
---|
1307 | buf_count = -1; /* buffering off */
|
---|
1308 | } else if (buf_count >= 4) {
|
---|
1309 | /* Did CGI add "HTTP"? */
|
---|
1310 | if (memcmp(rbuf, HTTP_200, 4) != 0) {
|
---|
1311 | /* there is no "HTTP", do it ourself */
|
---|
1312 | if (full_write(1, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
|
---|
1313 | break;
|
---|
1314 | }
|
---|
1315 | /* Commented out:
|
---|
1316 | if (!strstr(rbuf, "ontent-")) {
|
---|
1317 | full_write(s, "Content-type: text/plain\r\n\r\n", 28);
|
---|
1318 | }
|
---|
1319 | * Counter-example of valid CGI without Content-type:
|
---|
1320 | * echo -en "HTTP/1.0 302 Found\r\n"
|
---|
1321 | * echo -en "Location: http://www.busybox.net\r\n"
|
---|
1322 | * echo -en "\r\n"
|
---|
1323 | */
|
---|
1324 | count = buf_count;
|
---|
1325 | buf_count = -1; /* buffering off */
|
---|
1326 | }
|
---|
1327 | } else {
|
---|
1328 | count = safe_read(fromCgi.rd, rbuf, PIPESIZE);
|
---|
1329 | if (count <= 0)
|
---|
1330 | break; /* eof (or error) */
|
---|
1331 | }
|
---|
1332 | if (full_write(1, rbuf, count) != count)
|
---|
1333 | break;
|
---|
1334 | if (DEBUG)
|
---|
1335 | fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
|
---|
1336 | } /* if (FD_ISSET(fromCgi.rd)) */
|
---|
1337 | } /* while (1) */
|
---|
1338 | log_and_exit();
|
---|
1339 | }
|
---|
1340 | #endif /* FEATURE_HTTPD_CGI */
|
---|
1341 |
|
---|
1342 | /*
|
---|
1343 | * Send a file response to a HTTP request, and exit
|
---|
1344 | *
|
---|
1345 | * Parameters:
|
---|
1346 | * const char *url The requested URL (with leading /).
|
---|
1347 | * headers Don't send headers before if FALSE.
|
---|
1348 | */
|
---|
1349 | static void send_file_and_exit(const char *url, int headers)
|
---|
1350 | {
|
---|
1351 | static const char *const suffixTable[] = {
|
---|
1352 | /* Warning: shorter equivalent suffix in one line must be first */
|
---|
1353 | ".htm.html", "text/html",
|
---|
1354 | ".jpg.jpeg", "image/jpeg",
|
---|
1355 | ".gif", "image/gif",
|
---|
1356 | ".png", "image/png",
|
---|
1357 | ".txt.h.c.cc.cpp", "text/plain",
|
---|
1358 | ".css", "text/css",
|
---|
1359 | ".wav", "audio/wav",
|
---|
1360 | ".avi", "video/x-msvideo",
|
---|
1361 | ".qt.mov", "video/quicktime",
|
---|
1362 | ".mpe.mpeg", "video/mpeg",
|
---|
1363 | ".mid.midi", "audio/midi",
|
---|
1364 | ".mp3", "audio/mpeg",
|
---|
1365 | #if 0 /* unpopular */
|
---|
1366 | ".au", "audio/basic",
|
---|
1367 | ".pac", "application/x-ns-proxy-autoconfig",
|
---|
1368 | ".vrml.wrl", "model/vrml",
|
---|
1369 | #endif
|
---|
1370 | NULL
|
---|
1371 | };
|
---|
1372 |
|
---|
1373 | char *suffix;
|
---|
1374 | int f;
|
---|
1375 | const char *const *table;
|
---|
1376 | const char *try_suffix;
|
---|
1377 | ssize_t count;
|
---|
1378 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
---|
1379 | off_t offset = 0;
|
---|
1380 | #endif
|
---|
1381 |
|
---|
1382 | suffix = strrchr(url, '.');
|
---|
1383 |
|
---|
1384 | /* If not found, set default as "application/octet-stream"; */
|
---|
1385 | found_mime_type = "application/octet-stream";
|
---|
1386 | if (suffix) {
|
---|
1387 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
---|
1388 | Htaccess *cur;
|
---|
1389 | #endif
|
---|
1390 | for (table = suffixTable; *table; table += 2) {
|
---|
1391 | try_suffix = strstr(table[0], suffix);
|
---|
1392 | if (try_suffix) {
|
---|
1393 | try_suffix += strlen(suffix);
|
---|
1394 | if (*try_suffix == '\0' || *try_suffix == '.') {
|
---|
1395 | found_mime_type = table[1];
|
---|
1396 | break;
|
---|
1397 | }
|
---|
1398 | }
|
---|
1399 | }
|
---|
1400 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
|
---|
1401 | for (cur = mime_a; cur; cur = cur->next) {
|
---|
1402 | if (strcmp(cur->before_colon, suffix) == 0) {
|
---|
1403 | found_mime_type = cur->after_colon;
|
---|
1404 | break;
|
---|
1405 | }
|
---|
1406 | }
|
---|
1407 | #endif
|
---|
1408 | }
|
---|
1409 |
|
---|
1410 | if (DEBUG)
|
---|
1411 | bb_error_msg("sending file '%s' content-type: %s",
|
---|
1412 | url, found_mime_type);
|
---|
1413 |
|
---|
1414 | f = open(url, O_RDONLY);
|
---|
1415 | if (f < 0) {
|
---|
1416 | if (DEBUG)
|
---|
1417 | bb_perror_msg("cannot open '%s'", url);
|
---|
1418 | if (headers)
|
---|
1419 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
1420 | }
|
---|
1421 |
|
---|
1422 | if (headers)
|
---|
1423 | send_headers(HTTP_OK);
|
---|
1424 |
|
---|
1425 | /* If you want to know about EPIPE below
|
---|
1426 | * (happens if you abort downloads from local httpd): */
|
---|
1427 | signal(SIGPIPE, SIG_IGN);
|
---|
1428 |
|
---|
1429 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
---|
1430 | do {
|
---|
1431 | /* byte count (3rd arg) is rounded down to 64k */
|
---|
1432 | count = sendfile(1, f, &offset, MAXINT(ssize_t) - 0xffff);
|
---|
1433 | if (count < 0) {
|
---|
1434 | if (offset == 0)
|
---|
1435 | goto fallback;
|
---|
1436 | goto fin;
|
---|
1437 | }
|
---|
1438 | } while (count > 0);
|
---|
1439 | log_and_exit();
|
---|
1440 |
|
---|
1441 | fallback:
|
---|
1442 | #endif
|
---|
1443 | while ((count = safe_read(f, iobuf, IOBUF_SIZE)) > 0) {
|
---|
1444 | ssize_t n = count;
|
---|
1445 | count = full_write(1, iobuf, count);
|
---|
1446 | if (count != n)
|
---|
1447 | break;
|
---|
1448 | }
|
---|
1449 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
---|
1450 | fin:
|
---|
1451 | #endif
|
---|
1452 | if (count < 0 && verbose > 1)
|
---|
1453 | bb_perror_msg("error");
|
---|
1454 | log_and_exit();
|
---|
1455 | }
|
---|
1456 |
|
---|
1457 | static int checkPermIP(void)
|
---|
1458 | {
|
---|
1459 | Htaccess_IP *cur;
|
---|
1460 |
|
---|
1461 | /* This could stand some work */
|
---|
1462 | for (cur = ip_a_d; cur; cur = cur->next) {
|
---|
1463 | #if DEBUG
|
---|
1464 | fprintf(stderr,
|
---|
1465 | "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
|
---|
1466 | rmt_ip_str,
|
---|
1467 | (unsigned char)(cur->ip >> 24),
|
---|
1468 | (unsigned char)(cur->ip >> 16),
|
---|
1469 | (unsigned char)(cur->ip >> 8),
|
---|
1470 | (unsigned char)(cur->ip),
|
---|
1471 | (unsigned char)(cur->mask >> 24),
|
---|
1472 | (unsigned char)(cur->mask >> 16),
|
---|
1473 | (unsigned char)(cur->mask >> 8),
|
---|
1474 | (unsigned char)(cur->mask)
|
---|
1475 | );
|
---|
1476 | #endif
|
---|
1477 | if ((rmt_ip & cur->mask) == cur->ip)
|
---|
1478 | return cur->allow_deny == 'A'; /* Allow/Deny */
|
---|
1479 | }
|
---|
1480 |
|
---|
1481 | /* if unconfigured, return 1 - access from all */
|
---|
1482 | return !flg_deny_all;
|
---|
1483 | }
|
---|
1484 |
|
---|
1485 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
1486 | /*
|
---|
1487 | * Check the permission file for access password protected.
|
---|
1488 | *
|
---|
1489 | * If config file isn't present, everything is allowed.
|
---|
1490 | * Entries are of the form you can see example from header source
|
---|
1491 | *
|
---|
1492 | * path The file path.
|
---|
1493 | * request User information to validate.
|
---|
1494 | *
|
---|
1495 | * Returns 1 if request is OK.
|
---|
1496 | */
|
---|
1497 | static int checkPerm(const char *path, const char *request)
|
---|
1498 | {
|
---|
1499 | Htaccess *cur;
|
---|
1500 | const char *p;
|
---|
1501 | const char *p0;
|
---|
1502 |
|
---|
1503 | const char *prev = NULL;
|
---|
1504 |
|
---|
1505 | /* This could stand some work */
|
---|
1506 | for (cur = g_auth; cur; cur = cur->next) {
|
---|
1507 | size_t l;
|
---|
1508 |
|
---|
1509 | p0 = cur->before_colon;
|
---|
1510 | if (prev != NULL && strcmp(prev, p0) != 0)
|
---|
1511 | continue; /* find next identical */
|
---|
1512 | p = cur->after_colon;
|
---|
1513 | if (DEBUG)
|
---|
1514 | fprintf(stderr, "checkPerm: '%s' ? '%s'\n", p0, request);
|
---|
1515 |
|
---|
1516 | l = strlen(p0);
|
---|
1517 | if (strncmp(p0, path, l) == 0
|
---|
1518 | && (l == 1 || path[l] == '/' || path[l] == '\0')
|
---|
1519 | ) {
|
---|
1520 | char *u;
|
---|
1521 | /* path match found. Check request */
|
---|
1522 | /* for check next /path:user:password */
|
---|
1523 | prev = p0;
|
---|
1524 | u = strchr(request, ':');
|
---|
1525 | if (u == NULL) {
|
---|
1526 | /* bad request, ':' required */
|
---|
1527 | break;
|
---|
1528 | }
|
---|
1529 |
|
---|
1530 | if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
|
---|
1531 | char *cipher;
|
---|
1532 | char *pp;
|
---|
1533 |
|
---|
1534 | if (strncmp(p, request, u - request) != 0) {
|
---|
1535 | /* user doesn't match */
|
---|
1536 | continue;
|
---|
1537 | }
|
---|
1538 | pp = strchr(p, ':');
|
---|
1539 | if (pp && pp[1] == '$' && pp[2] == '1'
|
---|
1540 | && pp[3] == '$' && pp[4]
|
---|
1541 | ) {
|
---|
1542 | pp++;
|
---|
1543 | cipher = pw_encrypt(u+1, pp);
|
---|
1544 | if (strcmp(cipher, pp) == 0)
|
---|
1545 | goto set_remoteuser_var; /* Ok */
|
---|
1546 | /* unauthorized */
|
---|
1547 | continue;
|
---|
1548 | }
|
---|
1549 | }
|
---|
1550 |
|
---|
1551 | if (strcmp(p, request) == 0) {
|
---|
1552 | set_remoteuser_var:
|
---|
1553 | remoteuser = strdup(request);
|
---|
1554 | if (remoteuser)
|
---|
1555 | remoteuser[u - request] = '\0';
|
---|
1556 | return 1; /* Ok */
|
---|
1557 | }
|
---|
1558 | /* unauthorized */
|
---|
1559 | }
|
---|
1560 | } /* for */
|
---|
1561 |
|
---|
1562 | return prev == NULL;
|
---|
1563 | }
|
---|
1564 | #endif /* FEATURE_HTTPD_BASIC_AUTH */
|
---|
1565 |
|
---|
1566 | /*
|
---|
1567 | * Handle timeouts
|
---|
1568 | */
|
---|
1569 | static void exit_on_signal(int sig) ATTRIBUTE_NORETURN;
|
---|
1570 | static void exit_on_signal(int sig)
|
---|
1571 | {
|
---|
1572 | send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
|
---|
1573 | }
|
---|
1574 |
|
---|
1575 | /*
|
---|
1576 | * Handle an incoming http request and exit.
|
---|
1577 | */
|
---|
1578 | static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) ATTRIBUTE_NORETURN;
|
---|
1579 | static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
|
---|
1580 | {
|
---|
1581 | static const char request_GET[] ALIGN1 = "GET";
|
---|
1582 |
|
---|
1583 | struct stat sb;
|
---|
1584 | char *urlcopy;
|
---|
1585 | char *urlp;
|
---|
1586 | char *tptr;
|
---|
1587 | int http_major_version;
|
---|
1588 | int ip_allowed;
|
---|
1589 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
1590 | const char *prequest;
|
---|
1591 | unsigned long length = 0;
|
---|
1592 | char *cookie = 0;
|
---|
1593 | char *content_type = 0;
|
---|
1594 | #endif
|
---|
1595 | struct sigaction sa;
|
---|
1596 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
1597 | int credentials = -1; /* if not required this is Ok */
|
---|
1598 | #endif
|
---|
1599 |
|
---|
1600 | /* Allocation of iobuf is postponed until now
|
---|
1601 | * (IOW, server process doesn't need to waste 8k) */
|
---|
1602 | iobuf = xmalloc(IOBUF_SIZE);
|
---|
1603 |
|
---|
1604 | rmt_ip = 0;
|
---|
1605 | if (fromAddr->sa.sa_family == AF_INET) {
|
---|
1606 | rmt_ip = ntohl(fromAddr->sin.sin_addr.s_addr);
|
---|
1607 | }
|
---|
1608 | #if ENABLE_FEATURE_IPV6
|
---|
1609 | if (fromAddr->sa.sa_family == AF_INET6
|
---|
1610 | && fromAddr->sin6.sin6_addr.s6_addr32[0] == 0
|
---|
1611 | && fromAddr->sin6.sin6_addr.s6_addr32[1] == 0
|
---|
1612 | && ntohl(fromAddr->sin6.sin6_addr.s6_addr32[2]) == 0xffff)
|
---|
1613 | rmt_ip = ntohl(fromAddr->sin6.sin6_addr.s6_addr32[3]);
|
---|
1614 | #endif
|
---|
1615 | if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
|
---|
1616 | rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->sa);
|
---|
1617 | }
|
---|
1618 | if (verbose) {
|
---|
1619 | /* this trick makes -v logging much simpler */
|
---|
1620 | applet_name = rmt_ip_str;
|
---|
1621 | if (verbose > 2)
|
---|
1622 | bb_error_msg("connected");
|
---|
1623 | }
|
---|
1624 |
|
---|
1625 | /* Install timeout handler */
|
---|
1626 | memset(&sa, 0, sizeof(sa));
|
---|
1627 | sa.sa_handler = exit_on_signal;
|
---|
1628 | /* sigemptyset(&sa.sa_mask); - memset should be enough */
|
---|
1629 | /*sa.sa_flags = 0; - no SA_RESTART */
|
---|
1630 | sigaction(SIGALRM, &sa, NULL);
|
---|
1631 | alarm(HEADER_READ_TIMEOUT);
|
---|
1632 |
|
---|
1633 | if (!get_line()) /* EOF or error or empty line */
|
---|
1634 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1635 |
|
---|
1636 | /* Determine type of request (GET/POST) */
|
---|
1637 | urlp = strpbrk(iobuf, " \t");
|
---|
1638 | if (urlp == NULL)
|
---|
1639 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1640 | *urlp++ = '\0';
|
---|
1641 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
1642 | prequest = request_GET;
|
---|
1643 | if (strcasecmp(iobuf, prequest) != 0) {
|
---|
1644 | prequest = "POST";
|
---|
1645 | if (strcasecmp(iobuf, prequest) != 0)
|
---|
1646 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
1647 | }
|
---|
1648 | #else
|
---|
1649 | if (strcasecmp(iobuf, request_GET) != 0)
|
---|
1650 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
1651 | #endif
|
---|
1652 | urlp = skip_whitespace(urlp);
|
---|
1653 | if (urlp[0] != '/')
|
---|
1654 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1655 |
|
---|
1656 | /* Find end of URL and parse HTTP version, if any */
|
---|
1657 | http_major_version = -1;
|
---|
1658 | tptr = strchrnul(urlp, ' ');
|
---|
1659 | /* Is it " HTTP/"? */
|
---|
1660 | if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0)
|
---|
1661 | http_major_version = (tptr[6] - '0');
|
---|
1662 | *tptr = '\0';
|
---|
1663 |
|
---|
1664 | /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
|
---|
1665 | urlcopy = alloca((tptr - urlp) + sizeof("/index.html"));
|
---|
1666 | /*if (urlcopy == NULL)
|
---|
1667 | * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
|
---|
1668 | strcpy(urlcopy, urlp);
|
---|
1669 | /* NB: urlcopy ptr is never changed after this */
|
---|
1670 |
|
---|
1671 | /* Extract url args if present */
|
---|
1672 | tptr = strchr(urlcopy, '?');
|
---|
1673 | g_query = NULL;
|
---|
1674 | if (tptr) {
|
---|
1675 | *tptr++ = '\0';
|
---|
1676 | g_query = tptr;
|
---|
1677 | }
|
---|
1678 |
|
---|
1679 | /* Decode URL escape sequences */
|
---|
1680 | tptr = decodeString(urlcopy, 0);
|
---|
1681 | if (tptr == NULL)
|
---|
1682 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1683 | if (tptr == urlcopy + 1) {
|
---|
1684 | /* '/' or NUL is encoded */
|
---|
1685 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
1686 | }
|
---|
1687 |
|
---|
1688 | /* Canonicalize path */
|
---|
1689 | /* Algorithm stolen from libbb bb_simplify_path(),
|
---|
1690 | * but don't strdup and reducing trailing slash and protect out root */
|
---|
1691 | urlp = tptr = urlcopy;
|
---|
1692 | do {
|
---|
1693 | if (*urlp == '/') {
|
---|
1694 | /* skip duplicate (or initial) slash */
|
---|
1695 | if (*tptr == '/') {
|
---|
1696 | continue;
|
---|
1697 | }
|
---|
1698 | if (*tptr == '.') {
|
---|
1699 | /* skip extra '.' */
|
---|
1700 | if (tptr[1] == '/' || !tptr[1]) {
|
---|
1701 | continue;
|
---|
1702 | }
|
---|
1703 | /* '..': be careful */
|
---|
1704 | if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
|
---|
1705 | ++tptr;
|
---|
1706 | if (urlp == urlcopy) /* protect root */
|
---|
1707 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1708 | while (*--urlp != '/') /* omit previous dir */;
|
---|
1709 | continue;
|
---|
1710 | }
|
---|
1711 | }
|
---|
1712 | }
|
---|
1713 | *++urlp = *tptr;
|
---|
1714 | } while (*++tptr);
|
---|
1715 | *++urlp = '\0'; /* so keep last character */
|
---|
1716 | tptr = urlp; /* end ptr */
|
---|
1717 |
|
---|
1718 | /* If URL is a directory, add '/' */
|
---|
1719 | if (tptr[-1] != '/') {
|
---|
1720 | if (is_directory(urlcopy + 1, 1, &sb)) {
|
---|
1721 | found_moved_temporarily = urlcopy;
|
---|
1722 | }
|
---|
1723 | }
|
---|
1724 |
|
---|
1725 | /* Log it */
|
---|
1726 | if (verbose > 1)
|
---|
1727 | bb_error_msg("url:%s", urlcopy);
|
---|
1728 |
|
---|
1729 | tptr = urlcopy;
|
---|
1730 | ip_allowed = checkPermIP();
|
---|
1731 | while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
|
---|
1732 | /* have path1/path2 */
|
---|
1733 | *tptr = '\0';
|
---|
1734 | if (is_directory(urlcopy + 1, 1, &sb)) {
|
---|
1735 | /* may be having subdir config */
|
---|
1736 | parse_conf(urlcopy + 1, SUBDIR_PARSE);
|
---|
1737 | ip_allowed = checkPermIP();
|
---|
1738 | }
|
---|
1739 | *tptr = '/';
|
---|
1740 | }
|
---|
1741 | if (http_major_version >= 0) {
|
---|
1742 | /* Request was with "... HTTP/nXXX", and n >= 0 */
|
---|
1743 |
|
---|
1744 | /* Read until blank line for HTTP version specified, else parse immediate */
|
---|
1745 | while (1) {
|
---|
1746 | alarm(HEADER_READ_TIMEOUT);
|
---|
1747 | if (!get_line())
|
---|
1748 | break; /* EOF or error or empty line */
|
---|
1749 | if (DEBUG)
|
---|
1750 | bb_error_msg("header: '%s'", iobuf);
|
---|
1751 |
|
---|
1752 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
1753 | /* try and do our best to parse more lines */
|
---|
1754 | if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
|
---|
1755 | /* extra read only for POST */
|
---|
1756 | if (prequest != request_GET) {
|
---|
1757 | tptr = iobuf + sizeof("Content-length:") - 1;
|
---|
1758 | if (!tptr[0])
|
---|
1759 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1760 | errno = 0;
|
---|
1761 | /* not using strtoul: it ignores leading minus! */
|
---|
1762 | length = strtol(tptr, &tptr, 10);
|
---|
1763 | /* length is "ulong", but we need to pass it to int later */
|
---|
1764 | /* so we check for negative or too large values in one go: */
|
---|
1765 | /* (long -> ulong conv caused negatives to be seen as > INT_MAX) */
|
---|
1766 | if (tptr[0] || errno || length > INT_MAX)
|
---|
1767 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
1768 | }
|
---|
1769 | } else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
|
---|
1770 | cookie = strdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
|
---|
1771 | } else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
|
---|
1772 | content_type = strdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
|
---|
1773 | } else if (STRNCASECMP(iobuf, "Referer:") == 0) {
|
---|
1774 | referer = strdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
|
---|
1775 | } else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
|
---|
1776 | user_agent = strdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
|
---|
1777 | }
|
---|
1778 | #endif
|
---|
1779 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
1780 | if (STRNCASECMP(iobuf, "Authorization:") == 0) {
|
---|
1781 | /* We only allow Basic credentials.
|
---|
1782 | * It shows up as "Authorization: Basic <userid:password>" where
|
---|
1783 | * the userid:password is base64 encoded.
|
---|
1784 | */
|
---|
1785 | tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
|
---|
1786 | if (STRNCASECMP(tptr, "Basic") != 0)
|
---|
1787 | continue;
|
---|
1788 | tptr += sizeof("Basic")-1;
|
---|
1789 | /* decodeBase64() skips whitespace itself */
|
---|
1790 | decodeBase64(tptr);
|
---|
1791 | credentials = checkPerm(urlcopy, tptr);
|
---|
1792 | }
|
---|
1793 | #endif /* FEATURE_HTTPD_BASIC_AUTH */
|
---|
1794 | } /* while extra header reading */
|
---|
1795 | }
|
---|
1796 |
|
---|
1797 | /* We read headers, disable peer timeout */
|
---|
1798 | alarm(0);
|
---|
1799 |
|
---|
1800 | if (strcmp(bb_basename(urlcopy), httpd_conf) == 0 || ip_allowed == 0) {
|
---|
1801 | /* protect listing [/path]/httpd_conf or IP deny */
|
---|
1802 | send_headers_and_exit(HTTP_FORBIDDEN);
|
---|
1803 | }
|
---|
1804 |
|
---|
1805 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
1806 | if (credentials <= 0 && checkPerm(urlcopy, ":") == 0) {
|
---|
1807 | send_headers_and_exit(HTTP_UNAUTHORIZED);
|
---|
1808 | }
|
---|
1809 | #endif
|
---|
1810 |
|
---|
1811 | if (found_moved_temporarily) {
|
---|
1812 | send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
|
---|
1813 | }
|
---|
1814 |
|
---|
1815 | tptr = urlcopy + 1; /* skip first '/' */
|
---|
1816 |
|
---|
1817 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
1818 | if (strncmp(tptr, "cgi-bin/", 8) == 0) {
|
---|
1819 | if (tptr[8] == '\0') {
|
---|
1820 | /* protect listing "cgi-bin/" */
|
---|
1821 | send_headers_and_exit(HTTP_FORBIDDEN);
|
---|
1822 | }
|
---|
1823 | send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
|
---|
1824 | }
|
---|
1825 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
1826 | {
|
---|
1827 | char *suffix = strrchr(tptr, '.');
|
---|
1828 | if (suffix) {
|
---|
1829 | Htaccess *cur;
|
---|
1830 | for (cur = script_i; cur; cur = cur->next) {
|
---|
1831 | if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
---|
1832 | send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
|
---|
1833 | }
|
---|
1834 | }
|
---|
1835 | }
|
---|
1836 | }
|
---|
1837 | #endif
|
---|
1838 | if (prequest != request_GET) {
|
---|
1839 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
1840 | }
|
---|
1841 | #endif /* FEATURE_HTTPD_CGI */
|
---|
1842 |
|
---|
1843 | if (urlp[-1] == '/')
|
---|
1844 | strcpy(urlp, "index.html");
|
---|
1845 | if (stat(tptr, &sb) == 0) {
|
---|
1846 | /* It's a dir URL and there is index.html */
|
---|
1847 | ContentLength = sb.st_size;
|
---|
1848 | last_mod = sb.st_mtime;
|
---|
1849 | }
|
---|
1850 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
1851 | else if (urlp[-1] == '/') {
|
---|
1852 | /* It's a dir URL and there is no index.html
|
---|
1853 | * Try cgi-bin/index.cgi */
|
---|
1854 | if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
|
---|
1855 | urlp[0] = '\0';
|
---|
1856 | g_query = urlcopy;
|
---|
1857 | send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
|
---|
1858 | }
|
---|
1859 | }
|
---|
1860 | #endif
|
---|
1861 | /* else {
|
---|
1862 | * fall through to send_file, it errors out if open fails
|
---|
1863 | * }
|
---|
1864 | */
|
---|
1865 |
|
---|
1866 | send_file_and_exit(tptr, TRUE);
|
---|
1867 | }
|
---|
1868 |
|
---|
1869 | /*
|
---|
1870 | * The main http server function.
|
---|
1871 | * Given a socket, listen for new connections and farm out
|
---|
1872 | * the processing as a [v]forked process.
|
---|
1873 | * Never returns.
|
---|
1874 | */
|
---|
1875 | #if BB_MMU
|
---|
1876 | static void mini_httpd(int server_socket) ATTRIBUTE_NORETURN;
|
---|
1877 | static void mini_httpd(int server_socket)
|
---|
1878 | {
|
---|
1879 | /* NB: it's best to not use xfuncs in this loop before fork().
|
---|
1880 | * Otherwise server may die on transient errors (temporary
|
---|
1881 | * out-of-memory condition, etc), which is Bad(tm).
|
---|
1882 | * Try to do any dangerous calls after fork.
|
---|
1883 | */
|
---|
1884 | while (1) {
|
---|
1885 | int n;
|
---|
1886 | len_and_sockaddr fromAddr;
|
---|
1887 |
|
---|
1888 | /* Wait for connections... */
|
---|
1889 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
1890 | n = accept(server_socket, &fromAddr.sa, &fromAddr.len);
|
---|
1891 |
|
---|
1892 | if (n < 0)
|
---|
1893 | continue;
|
---|
1894 | /* set the KEEPALIVE option to cull dead connections */
|
---|
1895 | setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
---|
1896 |
|
---|
1897 | if (fork() == 0) {
|
---|
1898 | /* child */
|
---|
1899 | #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
---|
1900 | /* Do not reload config on HUP */
|
---|
1901 | signal(SIGHUP, SIG_IGN);
|
---|
1902 | #endif
|
---|
1903 | close(server_socket);
|
---|
1904 | xmove_fd(n, 0);
|
---|
1905 | xdup2(0, 1);
|
---|
1906 |
|
---|
1907 | handle_incoming_and_exit(&fromAddr);
|
---|
1908 | }
|
---|
1909 | /* parent, or fork failed */
|
---|
1910 | close(n);
|
---|
1911 | } /* while (1) */
|
---|
1912 | /* never reached */
|
---|
1913 | }
|
---|
1914 | #else
|
---|
1915 | static void mini_httpd_nommu(int server_socket, int argc, char **argv) ATTRIBUTE_NORETURN;
|
---|
1916 | static void mini_httpd_nommu(int server_socket, int argc, char **argv)
|
---|
1917 | {
|
---|
1918 | char *argv_copy[argc + 2];
|
---|
1919 |
|
---|
1920 | argv_copy[0] = argv[0];
|
---|
1921 | argv_copy[1] = (char*)"-i";
|
---|
1922 | memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
|
---|
1923 |
|
---|
1924 | /* NB: it's best to not use xfuncs in this loop before vfork().
|
---|
1925 | * Otherwise server may die on transient errors (temporary
|
---|
1926 | * out-of-memory condition, etc), which is Bad(tm).
|
---|
1927 | * Try to do any dangerous calls after fork.
|
---|
1928 | */
|
---|
1929 | while (1) {
|
---|
1930 | int n;
|
---|
1931 | len_and_sockaddr fromAddr;
|
---|
1932 |
|
---|
1933 | /* Wait for connections... */
|
---|
1934 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
1935 | n = accept(server_socket, &fromAddr.sa, &fromAddr.len);
|
---|
1936 |
|
---|
1937 | if (n < 0)
|
---|
1938 | continue;
|
---|
1939 | /* set the KEEPALIVE option to cull dead connections */
|
---|
1940 | setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
---|
1941 |
|
---|
1942 | if (vfork() == 0) {
|
---|
1943 | /* child */
|
---|
1944 | #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
---|
1945 | /* Do not reload config on HUP */
|
---|
1946 | signal(SIGHUP, SIG_IGN);
|
---|
1947 | #endif
|
---|
1948 | close(server_socket);
|
---|
1949 | xmove_fd(n, 0);
|
---|
1950 | xdup2(0, 1);
|
---|
1951 |
|
---|
1952 | /* Run a copy of ourself in inetd mode */
|
---|
1953 | re_exec(argv_copy);
|
---|
1954 | }
|
---|
1955 | /* parent, or vfork failed */
|
---|
1956 | close(n);
|
---|
1957 | } /* while (1) */
|
---|
1958 | /* never reached */
|
---|
1959 | }
|
---|
1960 | #endif
|
---|
1961 |
|
---|
1962 | /*
|
---|
1963 | * Process a HTTP connection on stdin/out.
|
---|
1964 | * Never returns.
|
---|
1965 | */
|
---|
1966 | static void mini_httpd_inetd(void) ATTRIBUTE_NORETURN;
|
---|
1967 | static void mini_httpd_inetd(void)
|
---|
1968 | {
|
---|
1969 | len_and_sockaddr fromAddr;
|
---|
1970 |
|
---|
1971 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
1972 | getpeername(0, &fromAddr.sa, &fromAddr.len);
|
---|
1973 | handle_incoming_and_exit(&fromAddr);
|
---|
1974 | }
|
---|
1975 |
|
---|
1976 | #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
---|
1977 | static void sighup_handler(int sig)
|
---|
1978 | {
|
---|
1979 | struct sigaction sa;
|
---|
1980 |
|
---|
1981 | parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
|
---|
1982 |
|
---|
1983 | memset(&sa, 0, sizeof(sa));
|
---|
1984 | sa.sa_handler = sighup_handler;
|
---|
1985 | /*sigemptyset(&sa.sa_mask); - memset should be enough */
|
---|
1986 | sa.sa_flags = SA_RESTART;
|
---|
1987 | sigaction(SIGHUP, &sa, NULL);
|
---|
1988 | }
|
---|
1989 | #endif
|
---|
1990 |
|
---|
1991 | enum {
|
---|
1992 | c_opt_config_file = 0,
|
---|
1993 | d_opt_decode_url,
|
---|
1994 | h_opt_home_httpd,
|
---|
1995 | USE_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
|
---|
1996 | USE_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
|
---|
1997 | USE_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
|
---|
1998 | USE_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
|
---|
1999 | p_opt_port ,
|
---|
2000 | p_opt_inetd ,
|
---|
2001 | p_opt_foreground,
|
---|
2002 | p_opt_verbose ,
|
---|
2003 | OPT_CONFIG_FILE = 1 << c_opt_config_file,
|
---|
2004 | OPT_DECODE_URL = 1 << d_opt_decode_url,
|
---|
2005 | OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
|
---|
2006 | OPT_ENCODE_URL = USE_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
|
---|
2007 | OPT_REALM = USE_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
|
---|
2008 | OPT_MD5 = USE_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
|
---|
2009 | OPT_SETUID = USE_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
|
---|
2010 | OPT_PORT = 1 << p_opt_port,
|
---|
2011 | OPT_INETD = 1 << p_opt_inetd,
|
---|
2012 | OPT_FOREGROUND = 1 << p_opt_foreground,
|
---|
2013 | OPT_VERBOSE = 1 << p_opt_verbose,
|
---|
2014 | };
|
---|
2015 |
|
---|
2016 |
|
---|
2017 | int httpd_main(int argc, char **argv);
|
---|
2018 | int httpd_main(int argc, char **argv)
|
---|
2019 | {
|
---|
2020 | int server_socket = server_socket; /* for gcc */
|
---|
2021 | unsigned opt;
|
---|
2022 | char *url_for_decode;
|
---|
2023 | USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
|
---|
2024 | USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
|
---|
2025 | USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
|
---|
2026 | USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
|
---|
2027 |
|
---|
2028 | INIT_G();
|
---|
2029 |
|
---|
2030 | #if ENABLE_LOCALE_SUPPORT
|
---|
2031 | /* Undo busybox.c: we want to speak English in http (dates etc) */
|
---|
2032 | setlocale(LC_TIME, "C");
|
---|
2033 | #endif
|
---|
2034 |
|
---|
2035 | home_httpd = xrealloc_getcwd_or_warn(NULL);
|
---|
2036 | /* -v counts, -i implies -f */
|
---|
2037 | opt_complementary = "vv:if";
|
---|
2038 | /* We do not "absolutize" path given by -h (home) opt.
|
---|
2039 | * If user gives relative path in -h, $SCRIPT_FILENAME can end up
|
---|
2040 | * relative too. */
|
---|
2041 | opt = getopt32(argv, "c:d:h:"
|
---|
2042 | USE_FEATURE_HTTPD_ENCODE_URL_STR("e:")
|
---|
2043 | USE_FEATURE_HTTPD_BASIC_AUTH("r:")
|
---|
2044 | USE_FEATURE_HTTPD_AUTH_MD5("m:")
|
---|
2045 | USE_FEATURE_HTTPD_SETUID("u:")
|
---|
2046 | "p:ifv",
|
---|
2047 | &configFile, &url_for_decode, &home_httpd
|
---|
2048 | USE_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
|
---|
2049 | USE_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
|
---|
2050 | USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
|
---|
2051 | USE_FEATURE_HTTPD_SETUID(, &s_ugid)
|
---|
2052 | , &bind_addr_or_port
|
---|
2053 | , &verbose
|
---|
2054 | );
|
---|
2055 | if (opt & OPT_DECODE_URL) {
|
---|
2056 | fputs(decodeString(url_for_decode, 1), stdout);
|
---|
2057 | return 0;
|
---|
2058 | }
|
---|
2059 | #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
---|
2060 | if (opt & OPT_ENCODE_URL) {
|
---|
2061 | fputs(encodeString(url_for_encode), stdout);
|
---|
2062 | return 0;
|
---|
2063 | }
|
---|
2064 | #endif
|
---|
2065 | #if ENABLE_FEATURE_HTTPD_AUTH_MD5
|
---|
2066 | if (opt & OPT_MD5) {
|
---|
2067 | puts(pw_encrypt(pass, "$1$"));
|
---|
2068 | return 0;
|
---|
2069 | }
|
---|
2070 | #endif
|
---|
2071 | #if ENABLE_FEATURE_HTTPD_SETUID
|
---|
2072 | if (opt & OPT_SETUID) {
|
---|
2073 | if (!get_uidgid(&ugid, s_ugid, 1))
|
---|
2074 | bb_error_msg_and_die("unrecognized user[:group] "
|
---|
2075 | "name '%s'", s_ugid);
|
---|
2076 | }
|
---|
2077 | #endif
|
---|
2078 |
|
---|
2079 | #if !BB_MMU
|
---|
2080 | if (!(opt & OPT_FOREGROUND)) {
|
---|
2081 | bb_daemonize_or_rexec(0, argv); /* don't change current directory */
|
---|
2082 | }
|
---|
2083 | #endif
|
---|
2084 |
|
---|
2085 | xchdir(home_httpd);
|
---|
2086 | if (!(opt & OPT_INETD)) {
|
---|
2087 | signal(SIGCHLD, SIG_IGN);
|
---|
2088 | server_socket = openServer();
|
---|
2089 | #if ENABLE_FEATURE_HTTPD_SETUID
|
---|
2090 | /* drop privileges */
|
---|
2091 | if (opt & OPT_SETUID) {
|
---|
2092 | if (ugid.gid != (gid_t)-1) {
|
---|
2093 | if (setgroups(1, &ugid.gid) == -1)
|
---|
2094 | bb_perror_msg_and_die("setgroups");
|
---|
2095 | xsetgid(ugid.gid);
|
---|
2096 | }
|
---|
2097 | xsetuid(ugid.uid);
|
---|
2098 | }
|
---|
2099 | #endif
|
---|
2100 | }
|
---|
2101 |
|
---|
2102 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
2103 | {
|
---|
2104 | char *p = getenv("PATH");
|
---|
2105 | /* env strings themself are not freed, no need to strdup(p): */
|
---|
2106 | clearenv();
|
---|
2107 | if (p)
|
---|
2108 | putenv(p - 5);
|
---|
2109 | // if (!(opt & OPT_INETD))
|
---|
2110 | // setenv_long("SERVER_PORT", ???);
|
---|
2111 | }
|
---|
2112 | #endif
|
---|
2113 |
|
---|
2114 | #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
|
---|
2115 | if (!(opt & OPT_INETD))
|
---|
2116 | sighup_handler(0);
|
---|
2117 | else /* do not install HUP handler in inetd mode */
|
---|
2118 | #endif
|
---|
2119 | parse_conf(default_path_httpd_conf, FIRST_PARSE);
|
---|
2120 |
|
---|
2121 | xfunc_error_retval = 0;
|
---|
2122 | if (opt & OPT_INETD)
|
---|
2123 | mini_httpd_inetd();
|
---|
2124 | #if BB_MMU
|
---|
2125 | if (!(opt & OPT_FOREGROUND))
|
---|
2126 | bb_daemonize(0); /* don't change current directory */
|
---|
2127 | mini_httpd(server_socket); /* never returns */
|
---|
2128 | #else
|
---|
2129 | mini_httpd_nommu(server_socket, argc, argv); /* never returns */
|
---|
2130 | #endif
|
---|
2131 | /* return 0; */
|
---|
2132 | }
|
---|