[821] | 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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[2725] | 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 9 | *
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| 10 | *****************************************************************************
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| 11 | *
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| 12 | * Typical usage:
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[2725] | 13 | * For non root user:
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| 14 | * httpd -p 8080 -h $HOME/public_html
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| 15 | * For daemon start from rc script with uid=0:
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| 16 | * httpd -u www
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| 17 | * which is equivalent to (assuming user www has uid 80):
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| 18 | * httpd -p 80 -u 80 -h $PWD -c /etc/httpd.conf -r "Web Server Authentication"
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[821] | 19 | *
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[2725] | 20 | * When an url starts with "/cgi-bin/" it is assumed to be a cgi script.
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| 21 | * The server changes directory to the location of the script and executes it
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[821] | 22 | * after setting QUERY_STRING and other environment variables.
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| 23 | *
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[3232] | 24 | * If directory URL is given, no index.html is found and CGI support is enabled,
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| 25 | * cgi-bin/index.cgi will be run. Directory to list is ../$QUERY_STRING.
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| 26 | * See httpd_indexcgi.c for an example GCI code.
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| 27 | *
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[1765] | 28 | * Doc:
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| 29 | * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
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| 30 | *
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[2725] | 31 | * The applet can also be invoked as an url arg decoder and html text encoder
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[821] | 32 | * as follows:
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[2725] | 33 | * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
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| 34 | * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
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[821] | 35 | * Note that url encoding for arguments is not the same as html encoding for
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[2725] | 36 | * presentation. -d decodes an url-encoded argument while -e encodes in html
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[821] | 37 | * for page display.
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| 38 | *
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| 39 | * httpd.conf has the following format:
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| 40 | *
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[2725] | 41 | * H:/serverroot # define the server root. It will override -h
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[821] | 42 | * A:172.20. # Allow address from 172.20.0.0/16
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| 43 | * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
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| 44 | * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
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| 45 | * A:127.0.0.1 # Allow local loopback connections
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| 46 | * D:* # Deny from other IP connections
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[1765] | 47 | * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
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[2725] | 48 | * I:index.html # Show index.html when a directory is requested
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| 49 | *
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| 50 | * P:/url:[http://]hostname[:port]/new/path
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| 51 | * # When /urlXXXXXX is requested, reverse proxy
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| 52 | * # it to http://hostname[:port]/new/pathXXXXXX
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| 53 | *
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[821] | 54 | * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
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| 55 | * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
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| 56 | * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
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[3232] | 57 | * /adm:root:* # or user root, pwd from /etc/passwd on urls starting with /adm/
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| 58 | * /wiki:*:* # or any user from /etc/passwd with according pwd on urls starting with /wiki/
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[821] | 59 | * .au:audio/basic # additional mime type for audio.au files
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[2725] | 60 | * *.php:/path/php # run xxx.php through an interpreter
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[821] | 61 | *
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[2725] | 62 | * A/D may be as a/d or allow/deny - only first char matters.
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| 63 | * Deny/Allow IP logic:
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| 64 | * - Default is to allow all (Allow all (A:*) is a no-op).
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[821] | 65 | * - Deny rules take precedence over allow rules.
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[2725] | 66 | * - "Deny all" rule (D:*) is applied last.
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[821] | 67 | *
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| 68 | * Example:
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| 69 | * 1. Allow only specified addresses
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| 70 | * A:172.20 # Allow any address that begins with 172.20.
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| 71 | * A:10.10. # Allow any address that begins with 10.10.
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| 72 | * A:127.0.0.1 # Allow local loopback connections
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| 73 | * D:* # Deny from other IP connections
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| 74 | *
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| 75 | * 2. Only deny specified addresses
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| 76 | * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
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| 77 | * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
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| 78 | * A:* # (optional line added for clarity)
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| 79 | *
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[3232] | 80 | * If a sub directory contains config file, it is parsed and merged with
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[821] | 81 | * any existing settings as if it was appended to the original configuration.
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| 82 | *
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| 83 | * subdir paths are relative to the containing subdir and thus cannot
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| 84 | * affect the parent rules.
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| 85 | *
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| 86 | * Note that since the sub dir is parsed in the forked thread servicing the
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| 87 | * subdir http request, any merge is discarded when the process exits. As a
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| 88 | * result, the subdir settings only have a lifetime of a single request.
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| 89 | *
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[1765] | 90 | * Custom error pages can contain an absolute path or be relative to
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| 91 | * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
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| 92 | * page can only be defined in the root configuration file and are not taken
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| 93 | * into account in local (directories) config files.
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[821] | 94 | *
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| 95 | * If -c is not set, an attempt will be made to open the default
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| 96 | * root configuration file. If -c is set and the file is not found, the
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| 97 | * server exits with an error.
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| 98 | *
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[1765] | 99 | */
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[2725] | 100 | /* TODO: use TCP_CORK, parse_config() */
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[821] | 101 |
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[3232] | 102 | //usage:#define httpd_trivial_usage
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| 103 | //usage: "[-ifv[v]]"
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| 104 | //usage: " [-c CONFFILE]"
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| 105 | //usage: " [-p [IP:]PORT]"
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| 106 | //usage: IF_FEATURE_HTTPD_SETUID(" [-u USER[:GRP]]")
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| 107 | //usage: IF_FEATURE_HTTPD_BASIC_AUTH(" [-r REALM]")
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| 108 | //usage: " [-h HOME]\n"
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| 109 | //usage: "or httpd -d/-e" IF_FEATURE_HTTPD_AUTH_MD5("/-m") " STRING"
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| 110 | //usage:#define httpd_full_usage "\n\n"
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| 111 | //usage: "Listen for incoming HTTP requests\n"
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| 112 | //usage: "\n -i Inetd mode"
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| 113 | //usage: "\n -f Don't daemonize"
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| 114 | //usage: "\n -v[v] Verbose"
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| 115 | //usage: "\n -p [IP:]PORT Bind to IP:PORT (default *:80)"
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| 116 | //usage: IF_FEATURE_HTTPD_SETUID(
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| 117 | //usage: "\n -u USER[:GRP] Set uid/gid after binding to port")
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| 118 | //usage: IF_FEATURE_HTTPD_BASIC_AUTH(
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| 119 | //usage: "\n -r REALM Authentication Realm for Basic Authentication")
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| 120 | //usage: "\n -h HOME Home directory (default .)"
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| 121 | //usage: "\n -c FILE Configuration file (default {/etc,HOME}/httpd.conf)"
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| 122 | //usage: IF_FEATURE_HTTPD_AUTH_MD5(
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| 123 | //usage: "\n -m STRING MD5 crypt STRING")
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| 124 | //usage: "\n -e STRING HTML encode STRING"
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| 125 | //usage: "\n -d STRING URL decode STRING"
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| 126 |
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[1765] | 127 | #include "libbb.h"
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[3232] | 128 | #if ENABLE_PAM
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| 129 | /* PAM may include <locale.h>. We may need to undefine bbox's stub define: */
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| 130 | # undef setlocale
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| 131 | /* For some obscure reason, PAM is not in pam/xxx, but in security/xxx.
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| 132 | * Apparently they like to confuse people. */
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| 133 | # include <security/pam_appl.h>
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| 134 | # include <security/pam_misc.h>
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| 135 | #endif
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[1765] | 136 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
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[2725] | 137 | # include <sys/sendfile.h>
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[1765] | 138 | #endif
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| 139 | /* amount of buffering in a pipe */
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| 140 | #ifndef PIPE_BUF
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| 141 | # define PIPE_BUF 4096
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[821] | 142 | #endif
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| 143 |
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[2725] | 144 | #define DEBUG 0
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[821] | 145 |
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[2725] | 146 | #define IOBUF_SIZE 8192
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| 147 | #if PIPE_BUF >= IOBUF_SIZE
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| 148 | # error "PIPE_BUF >= IOBUF_SIZE"
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| 149 | #endif
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| 150 |
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[1765] | 151 | #define HEADER_READ_TIMEOUT 60
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[821] | 152 |
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[2725] | 153 | static const char DEFAULT_PATH_HTTPD_CONF[] ALIGN1 = "/etc";
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| 154 | static const char HTTPD_CONF[] ALIGN1 = "httpd.conf";
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[1765] | 155 | static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
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[2725] | 156 | static const char index_html[] ALIGN1 = "index.html";
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[821] | 157 |
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[1765] | 158 | typedef struct has_next_ptr {
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| 159 | struct has_next_ptr *next;
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| 160 | } has_next_ptr;
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[821] | 161 |
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[1765] | 162 | /* Must have "next" as a first member */
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| 163 | typedef struct Htaccess {
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| 164 | struct Htaccess *next;
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[821] | 165 | char *after_colon;
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[1765] | 166 | char before_colon[1]; /* really bigger, must be last */
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[821] | 167 | } Htaccess;
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| 168 |
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[1765] | 169 | /* Must have "next" as a first member */
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| 170 | typedef struct Htaccess_IP {
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| 171 | struct Htaccess_IP *next;
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| 172 | unsigned ip;
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| 173 | unsigned mask;
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[821] | 174 | int allow_deny;
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| 175 | } Htaccess_IP;
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| 176 |
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[2725] | 177 | /* Must have "next" as a first member */
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| 178 | typedef struct Htaccess_Proxy {
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| 179 | struct Htaccess_Proxy *next;
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| 180 | char *url_from;
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| 181 | char *host_port;
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| 182 | char *url_to;
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| 183 | } Htaccess_Proxy;
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| 184 |
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[1765] | 185 | enum {
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| 186 | HTTP_OK = 200,
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[2725] | 187 | HTTP_PARTIAL_CONTENT = 206,
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[1765] | 188 | HTTP_MOVED_TEMPORARILY = 302,
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| 189 | HTTP_BAD_REQUEST = 400, /* malformed syntax */
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| 190 | HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
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| 191 | HTTP_NOT_FOUND = 404,
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| 192 | HTTP_FORBIDDEN = 403,
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| 193 | HTTP_REQUEST_TIMEOUT = 408,
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| 194 | HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
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| 195 | HTTP_INTERNAL_SERVER_ERROR = 500,
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| 196 | HTTP_CONTINUE = 100,
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| 197 | #if 0 /* future use */
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| 198 | HTTP_SWITCHING_PROTOCOLS = 101,
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| 199 | HTTP_CREATED = 201,
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| 200 | HTTP_ACCEPTED = 202,
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| 201 | HTTP_NON_AUTHORITATIVE_INFO = 203,
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| 202 | HTTP_NO_CONTENT = 204,
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| 203 | HTTP_MULTIPLE_CHOICES = 300,
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| 204 | HTTP_MOVED_PERMANENTLY = 301,
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| 205 | HTTP_NOT_MODIFIED = 304,
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| 206 | HTTP_PAYMENT_REQUIRED = 402,
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| 207 | HTTP_BAD_GATEWAY = 502,
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| 208 | HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
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| 209 | #endif
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| 210 | };
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[821] | 211 |
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[1765] | 212 | static const uint16_t http_response_type[] ALIGN2 = {
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| 213 | HTTP_OK,
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[2725] | 214 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 215 | HTTP_PARTIAL_CONTENT,
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| 216 | #endif
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[1765] | 217 | HTTP_MOVED_TEMPORARILY,
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| 218 | HTTP_REQUEST_TIMEOUT,
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| 219 | HTTP_NOT_IMPLEMENTED,
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[2725] | 220 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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[1765] | 221 | HTTP_UNAUTHORIZED,
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| 222 | #endif
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| 223 | HTTP_NOT_FOUND,
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| 224 | HTTP_BAD_REQUEST,
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| 225 | HTTP_FORBIDDEN,
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| 226 | HTTP_INTERNAL_SERVER_ERROR,
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| 227 | #if 0 /* not implemented */
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| 228 | HTTP_CREATED,
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| 229 | HTTP_ACCEPTED,
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| 230 | HTTP_NO_CONTENT,
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| 231 | HTTP_MULTIPLE_CHOICES,
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| 232 | HTTP_MOVED_PERMANENTLY,
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| 233 | HTTP_NOT_MODIFIED,
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| 234 | HTTP_BAD_GATEWAY,
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| 235 | HTTP_SERVICE_UNAVAILABLE,
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| 236 | #endif
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| 237 | };
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[821] | 238 |
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[1765] | 239 | static const struct {
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| 240 | const char *name;
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| 241 | const char *info;
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| 242 | } http_response[ARRAY_SIZE(http_response_type)] = {
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| 243 | { "OK", NULL },
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[2725] | 244 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 245 | { "Partial Content", NULL },
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| 246 | #endif
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| 247 | { "Found", NULL },
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[1765] | 248 | { "Request Timeout", "No request appeared within 60 seconds" },
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| 249 | { "Not Implemented", "The requested method is not recognized" },
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| 250 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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| 251 | { "Unauthorized", "" },
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| 252 | #endif
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| 253 | { "Not Found", "The requested URL was not found" },
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| 254 | { "Bad Request", "Unsupported method" },
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| 255 | { "Forbidden", "" },
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| 256 | { "Internal Server Error", "Internal Server Error" },
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| 257 | #if 0 /* not implemented */
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| 258 | { "Created" },
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| 259 | { "Accepted" },
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| 260 | { "No Content" },
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| 261 | { "Multiple Choices" },
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| 262 | { "Moved Permanently" },
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| 263 | { "Not Modified" },
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| 264 | { "Bad Gateway", "" },
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| 265 | { "Service Unavailable", "" },
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| 266 | #endif
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| 267 | };
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[821] | 268 |
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[1765] | 269 | struct globals {
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| 270 | int verbose; /* must be int (used by getopt32) */
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| 271 | smallint flg_deny_all;
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[821] | 272 |
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[2725] | 273 | unsigned rmt_ip; /* used for IP-based allow/deny rules */
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[1765] | 274 | time_t last_mod;
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| 275 | char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
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| 276 | const char *bind_addr_or_port;
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[821] | 277 |
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[1765] | 278 | const char *g_query;
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[2725] | 279 | const char *opt_c_configFile;
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[1765] | 280 | const char *home_httpd;
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[2725] | 281 | const char *index_page;
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[1765] | 282 |
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[821] | 283 | const char *found_mime_type;
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| 284 | const char *found_moved_temporarily;
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[1765] | 285 | Htaccess_IP *ip_a_d; /* config allow/deny lines */
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[821] | 286 |
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[2725] | 287 | IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
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| 288 | IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
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| 289 | IF_FEATURE_HTTPD_CGI(char *referer;)
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| 290 | IF_FEATURE_HTTPD_CGI(char *user_agent;)
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| 291 | IF_FEATURE_HTTPD_CGI(char *host;)
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| 292 | IF_FEATURE_HTTPD_CGI(char *http_accept;)
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| 293 | IF_FEATURE_HTTPD_CGI(char *http_accept_language;)
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[821] | 294 |
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[2725] | 295 | off_t file_size; /* -1 - unknown */
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| 296 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 297 | off_t range_start;
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| 298 | off_t range_end;
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| 299 | off_t range_len;
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| 300 | #endif
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| 301 |
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[1765] | 302 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
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| 303 | Htaccess *g_auth; /* config user:password lines */
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[821] | 304 | #endif
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[1765] | 305 | Htaccess *mime_a; /* config mime types */
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| 306 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
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| 307 | Htaccess *script_i; /* config script interpreters */
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[821] | 308 | #endif
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[2725] | 309 | char *iobuf; /* [IOBUF_SIZE] */
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[1765] | 310 | #define hdr_buf bb_common_bufsiz1
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| 311 | char *hdr_ptr;
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| 312 | int hdr_cnt;
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| 313 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
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| 314 | const char *http_error_page[ARRAY_SIZE(http_response_type)];
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[821] | 315 | #endif
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[2725] | 316 | #if ENABLE_FEATURE_HTTPD_PROXY
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| 317 | Htaccess_Proxy *proxy;
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| 318 | #endif
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| 319 | #if ENABLE_FEATURE_HTTPD_GZIP
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| 320 | /* client can handle gzip / we are going to send gzip */
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| 321 | smallint content_gzip;
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| 322 | #endif
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[1765] | 323 | };
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| 324 | #define G (*ptr_to_globals)
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| 325 | #define verbose (G.verbose )
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| 326 | #define flg_deny_all (G.flg_deny_all )
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| 327 | #define rmt_ip (G.rmt_ip )
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| 328 | #define bind_addr_or_port (G.bind_addr_or_port)
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| 329 | #define g_query (G.g_query )
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[2725] | 330 | #define opt_c_configFile (G.opt_c_configFile )
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[1765] | 331 | #define home_httpd (G.home_httpd )
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[2725] | 332 | #define index_page (G.index_page )
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[1765] | 333 | #define found_mime_type (G.found_mime_type )
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| 334 | #define found_moved_temporarily (G.found_moved_temporarily)
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| 335 | #define last_mod (G.last_mod )
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| 336 | #define ip_a_d (G.ip_a_d )
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| 337 | #define g_realm (G.g_realm )
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| 338 | #define remoteuser (G.remoteuser )
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| 339 | #define referer (G.referer )
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| 340 | #define user_agent (G.user_agent )
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[2725] | 341 | #define host (G.host )
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| 342 | #define http_accept (G.http_accept )
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| 343 | #define http_accept_language (G.http_accept_language)
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| 344 | #define file_size (G.file_size )
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| 345 | #if ENABLE_FEATURE_HTTPD_RANGES
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| 346 | #define range_start (G.range_start )
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| 347 | #define range_end (G.range_end )
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| 348 | #define range_len (G.range_len )
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| 349 | #else
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| 350 | enum {
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[3232] | 351 | range_start = -1,
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[2725] | 352 | range_end = MAXINT(off_t) - 1,
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| 353 | range_len = MAXINT(off_t),
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| 354 | };
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| 355 | #endif
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[1765] | 356 | #define rmt_ip_str (G.rmt_ip_str )
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| 357 | #define g_auth (G.g_auth )
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| 358 | #define mime_a (G.mime_a )
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| 359 | #define script_i (G.script_i )
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---|
| 360 | #define iobuf (G.iobuf )
|
---|
| 361 | #define hdr_ptr (G.hdr_ptr )
|
---|
| 362 | #define hdr_cnt (G.hdr_cnt )
|
---|
| 363 | #define http_error_page (G.http_error_page )
|
---|
[2725] | 364 | #define proxy (G.proxy )
|
---|
| 365 | #if ENABLE_FEATURE_HTTPD_GZIP
|
---|
| 366 | # define content_gzip (G.content_gzip )
|
---|
| 367 | #else
|
---|
| 368 | # define content_gzip 0
|
---|
| 369 | #endif
|
---|
[1765] | 370 | #define INIT_G() do { \
|
---|
[2725] | 371 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
---|
| 372 | IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
|
---|
[3232] | 373 | IF_FEATURE_HTTPD_RANGES(range_start = -1;) \
|
---|
[1765] | 374 | bind_addr_or_port = "80"; \
|
---|
[2725] | 375 | index_page = index_html; \
|
---|
| 376 | file_size = -1; \
|
---|
[1765] | 377 | } while (0)
|
---|
[821] | 378 |
|
---|
| 379 |
|
---|
[1765] | 380 | #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
|
---|
[821] | 381 |
|
---|
[1765] | 382 | /* Prototypes */
|
---|
[2725] | 383 | enum {
|
---|
| 384 | SEND_HEADERS = (1 << 0),
|
---|
| 385 | SEND_BODY = (1 << 1),
|
---|
| 386 | SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
|
---|
| 387 | };
|
---|
| 388 | static void send_file_and_exit(const char *url, int what) NORETURN;
|
---|
[821] | 389 |
|
---|
[1765] | 390 | static void free_llist(has_next_ptr **pptr)
|
---|
[821] | 391 | {
|
---|
[1765] | 392 | has_next_ptr *cur = *pptr;
|
---|
| 393 | while (cur) {
|
---|
| 394 | has_next_ptr *t = cur;
|
---|
| 395 | cur = cur->next;
|
---|
| 396 | free(t);
|
---|
| 397 | }
|
---|
| 398 | *pptr = NULL;
|
---|
| 399 | }
|
---|
[821] | 400 |
|
---|
[1765] | 401 | static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
|
---|
[821] | 402 | {
|
---|
[1765] | 403 | free_llist((has_next_ptr**)pptr);
|
---|
| 404 | }
|
---|
[821] | 405 |
|
---|
[1765] | 406 | static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
|
---|
| 407 | {
|
---|
| 408 | free_llist((has_next_ptr**)pptr);
|
---|
| 409 | }
|
---|
[821] | 410 |
|
---|
[1765] | 411 | /* Returns presumed mask width in bits or < 0 on error.
|
---|
| 412 | * Updates strp, stores IP at provided pointer */
|
---|
| 413 | static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
|
---|
| 414 | {
|
---|
| 415 | const char *p = *strp;
|
---|
| 416 | int auto_mask = 8;
|
---|
| 417 | unsigned ip = 0;
|
---|
| 418 | int j;
|
---|
[821] | 419 |
|
---|
[1765] | 420 | if (*p == '/')
|
---|
| 421 | return -auto_mask;
|
---|
[821] | 422 |
|
---|
[1765] | 423 | for (j = 0; j < 4; j++) {
|
---|
| 424 | unsigned octet;
|
---|
[821] | 425 |
|
---|
[1765] | 426 | if ((*p < '0' || *p > '9') && *p != '/' && *p)
|
---|
| 427 | return -auto_mask;
|
---|
| 428 | octet = 0;
|
---|
| 429 | while (*p >= '0' && *p <= '9') {
|
---|
| 430 | octet *= 10;
|
---|
| 431 | octet += *p - '0';
|
---|
| 432 | if (octet > 255)
|
---|
| 433 | return -auto_mask;
|
---|
| 434 | p++;
|
---|
| 435 | }
|
---|
| 436 | if (*p == '.')
|
---|
| 437 | p++;
|
---|
| 438 | if (*p != '/' && *p)
|
---|
| 439 | auto_mask += 8;
|
---|
| 440 | ip = (ip << 8) | octet;
|
---|
[821] | 441 | }
|
---|
[1765] | 442 | if (*p) {
|
---|
| 443 | if (*p != endc)
|
---|
| 444 | return -auto_mask;
|
---|
| 445 | p++;
|
---|
| 446 | if (*p == '\0')
|
---|
| 447 | return -auto_mask;
|
---|
| 448 | }
|
---|
| 449 | *ipp = ip;
|
---|
| 450 | *strp = p;
|
---|
| 451 | return auto_mask;
|
---|
[821] | 452 | }
|
---|
| 453 |
|
---|
[1765] | 454 | /* Returns 0 on success. Stores IP and mask at provided pointers */
|
---|
| 455 | static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
|
---|
[821] | 456 | {
|
---|
[1765] | 457 | int i;
|
---|
| 458 | unsigned mask;
|
---|
| 459 | char *p;
|
---|
[821] | 460 |
|
---|
[1765] | 461 | i = scan_ip(&str, ipp, '/');
|
---|
| 462 | if (i < 0)
|
---|
| 463 | return i;
|
---|
[821] | 464 |
|
---|
[1765] | 465 | if (*str) {
|
---|
| 466 | /* there is /xxx after dotted-IP address */
|
---|
| 467 | i = bb_strtou(str, &p, 10);
|
---|
| 468 | if (*p == '.') {
|
---|
| 469 | /* 'xxx' itself is dotted-IP mask, parse it */
|
---|
| 470 | /* (return 0 (success) only if it has N.N.N.N form) */
|
---|
| 471 | return scan_ip(&str, maskp, '\0') - 32;
|
---|
| 472 | }
|
---|
| 473 | if (*p)
|
---|
[821] | 474 | return -1;
|
---|
| 475 | }
|
---|
| 476 |
|
---|
[1765] | 477 | if (i > 32)
|
---|
| 478 | return -1;
|
---|
[821] | 479 |
|
---|
[1765] | 480 | if (sizeof(unsigned) == 4 && i == 32) {
|
---|
| 481 | /* mask >>= 32 below may not work */
|
---|
| 482 | mask = 0;
|
---|
| 483 | } else {
|
---|
| 484 | mask = 0xffffffff;
|
---|
| 485 | mask >>= i;
|
---|
| 486 | }
|
---|
| 487 | /* i == 0 -> *maskp = 0x00000000
|
---|
| 488 | * i == 1 -> *maskp = 0x80000000
|
---|
| 489 | * i == 4 -> *maskp = 0xf0000000
|
---|
| 490 | * i == 31 -> *maskp = 0xfffffffe
|
---|
| 491 | * i == 32 -> *maskp = 0xffffffff */
|
---|
| 492 | *maskp = (uint32_t)(~mask);
|
---|
| 493 | return 0;
|
---|
[821] | 494 | }
|
---|
| 495 |
|
---|
[1765] | 496 | /*
|
---|
| 497 | * Parse configuration file into in-memory linked list.
|
---|
[821] | 498 | *
|
---|
| 499 | * Any previous IP rules are discarded.
|
---|
| 500 | * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
|
---|
| 501 | * are also discarded. That is, previous settings are retained if flag is
|
---|
| 502 | * SUBDIR_PARSE.
|
---|
[1765] | 503 | * Error pages are only parsed on the main config file.
|
---|
[821] | 504 | *
|
---|
[1765] | 505 | * path Path where to look for httpd.conf (without filename).
|
---|
| 506 | * flag Type of the parse request.
|
---|
| 507 | */
|
---|
[2725] | 508 | /* flag param: */
|
---|
| 509 | enum {
|
---|
| 510 | FIRST_PARSE = 0, /* path will be "/etc" */
|
---|
| 511 | SIGNALED_PARSE = 1, /* path will be "/etc" */
|
---|
| 512 | SUBDIR_PARSE = 2, /* path will be derived from URL */
|
---|
| 513 | };
|
---|
[821] | 514 | static void parse_conf(const char *path, int flag)
|
---|
| 515 | {
|
---|
[2725] | 516 | /* internally used extra flag state */
|
---|
| 517 | enum { TRY_CURDIR_PARSE = 3 };
|
---|
| 518 |
|
---|
[1765] | 519 | FILE *f;
|
---|
[2725] | 520 | const char *filename;
|
---|
[1765] | 521 | char buf[160];
|
---|
[821] | 522 |
|
---|
[1765] | 523 | /* discard old rules */
|
---|
| 524 | free_Htaccess_IP_list(&ip_a_d);
|
---|
| 525 | flg_deny_all = 0;
|
---|
| 526 | /* retain previous auth and mime config only for subdir parse */
|
---|
| 527 | if (flag != SUBDIR_PARSE) {
|
---|
[2725] | 528 | free_Htaccess_list(&mime_a);
|
---|
[1765] | 529 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 530 | free_Htaccess_list(&g_auth);
|
---|
[821] | 531 | #endif
|
---|
[1765] | 532 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 533 | free_Htaccess_list(&script_i);
|
---|
[821] | 534 | #endif
|
---|
[1765] | 535 | }
|
---|
[821] | 536 |
|
---|
[2725] | 537 | filename = opt_c_configFile;
|
---|
| 538 | if (flag == SUBDIR_PARSE || filename == NULL) {
|
---|
| 539 | filename = alloca(strlen(path) + sizeof(HTTPD_CONF) + 2);
|
---|
| 540 | sprintf((char *)filename, "%s/%s", path, HTTPD_CONF);
|
---|
[821] | 541 | }
|
---|
| 542 |
|
---|
[2725] | 543 | while ((f = fopen_for_read(filename)) == NULL) {
|
---|
| 544 | if (flag >= SUBDIR_PARSE) { /* SUBDIR or TRY_CURDIR */
|
---|
[1765] | 545 | /* config file not found, no changes to config */
|
---|
| 546 | return;
|
---|
| 547 | }
|
---|
[2725] | 548 | if (flag == FIRST_PARSE) {
|
---|
| 549 | /* -c CONFFILE given, but CONFFILE doesn't exist? */
|
---|
| 550 | if (opt_c_configFile)
|
---|
| 551 | bb_simple_perror_msg_and_die(opt_c_configFile);
|
---|
| 552 | /* else: no -c, thus we looked at /etc/httpd.conf,
|
---|
| 553 | * and it's not there. try ./httpd.conf: */
|
---|
| 554 | }
|
---|
| 555 | flag = TRY_CURDIR_PARSE;
|
---|
| 556 | filename = HTTPD_CONF;
|
---|
[821] | 557 | }
|
---|
| 558 |
|
---|
[1765] | 559 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
[2725] | 560 | /* in "/file:user:pass" lines, we prepend path in subdirs */
|
---|
| 561 | if (flag != SUBDIR_PARSE)
|
---|
| 562 | path = "";
|
---|
[821] | 563 | #endif
|
---|
[2725] | 564 | /* The lines can be:
|
---|
| 565 | *
|
---|
| 566 | * I:default_index_file
|
---|
| 567 | * H:http_home
|
---|
| 568 | * [AD]:IP[/mask] # allow/deny, * for wildcard
|
---|
| 569 | * Ennn:error.html # error page for status nnn
|
---|
| 570 | * P:/url:[http://]hostname[:port]/new/path # reverse proxy
|
---|
| 571 | * .ext:mime/type # mime type
|
---|
| 572 | * *.php:/path/php # run xxx.php through an interpreter
|
---|
| 573 | * /file:user:pass # username and password
|
---|
| 574 | */
|
---|
| 575 | while (fgets(buf, sizeof(buf), f) != NULL) {
|
---|
| 576 | unsigned strlen_buf;
|
---|
| 577 | unsigned char ch;
|
---|
| 578 | char *after_colon;
|
---|
| 579 |
|
---|
| 580 | { /* remove all whitespace, and # comments */
|
---|
| 581 | char *p, *p0;
|
---|
| 582 |
|
---|
| 583 | p0 = buf;
|
---|
| 584 | /* skip non-whitespace beginning. Often the whole line
|
---|
| 585 | * is non-whitespace. We want this case to work fast,
|
---|
| 586 | * without needless copying, therefore we don't merge
|
---|
| 587 | * this operation into next while loop. */
|
---|
| 588 | while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
|
---|
| 589 | && ch != ' ' && ch != '\t'
|
---|
| 590 | ) {
|
---|
| 591 | p0++;
|
---|
[1765] | 592 | }
|
---|
[2725] | 593 | p = p0;
|
---|
| 594 | /* if we enter this loop, we have some whitespace.
|
---|
| 595 | * discard it */
|
---|
| 596 | while (ch != '\0' && ch != '\n' && ch != '#') {
|
---|
| 597 | if (ch != ' ' && ch != '\t') {
|
---|
| 598 | *p++ = ch;
|
---|
| 599 | }
|
---|
| 600 | ch = *++p0;
|
---|
| 601 | }
|
---|
| 602 | *p = '\0';
|
---|
| 603 | strlen_buf = p - buf;
|
---|
| 604 | if (strlen_buf == 0)
|
---|
| 605 | continue; /* empty line */
|
---|
[821] | 606 | }
|
---|
| 607 |
|
---|
[2725] | 608 | after_colon = strchr(buf, ':');
|
---|
| 609 | /* strange line? */
|
---|
| 610 | if (after_colon == NULL || *++after_colon == '\0')
|
---|
| 611 | goto config_error;
|
---|
| 612 |
|
---|
| 613 | ch = (buf[0] & ~0x20); /* toupper if it's a letter */
|
---|
| 614 |
|
---|
| 615 | if (ch == 'I') {
|
---|
| 616 | if (index_page != index_html)
|
---|
| 617 | free((char*)index_page);
|
---|
| 618 | index_page = xstrdup(after_colon);
|
---|
[1765] | 619 | continue;
|
---|
[2725] | 620 | }
|
---|
| 621 |
|
---|
| 622 | /* do not allow jumping around using H in subdir's configs */
|
---|
| 623 | if (flag == FIRST_PARSE && ch == 'H') {
|
---|
| 624 | home_httpd = xstrdup(after_colon);
|
---|
| 625 | xchdir(home_httpd);
|
---|
[1765] | 626 | continue;
|
---|
[821] | 627 | }
|
---|
| 628 |
|
---|
[2725] | 629 | if (ch == 'A' || ch == 'D') {
|
---|
| 630 | Htaccess_IP *pip;
|
---|
| 631 |
|
---|
| 632 | if (*after_colon == '*') {
|
---|
| 633 | if (ch == 'D') {
|
---|
| 634 | /* memorize "deny all" */
|
---|
| 635 | flg_deny_all = 1;
|
---|
[1765] | 636 | }
|
---|
[2725] | 637 | /* skip assumed "A:*", it is a default anyway */
|
---|
| 638 | continue;
|
---|
| 639 | }
|
---|
| 640 | /* store "allow/deny IP/mask" line */
|
---|
| 641 | pip = xzalloc(sizeof(*pip));
|
---|
| 642 | if (scan_ip_mask(after_colon, &pip->ip, &pip->mask)) {
|
---|
| 643 | /* IP{/mask} syntax error detected, protect all */
|
---|
| 644 | ch = 'D';
|
---|
| 645 | pip->mask = 0;
|
---|
| 646 | }
|
---|
| 647 | pip->allow_deny = ch;
|
---|
| 648 | if (ch == 'D') {
|
---|
| 649 | /* Deny:from_IP - prepend */
|
---|
| 650 | pip->next = ip_a_d;
|
---|
| 651 | ip_a_d = pip;
|
---|
| 652 | } else {
|
---|
| 653 | /* A:from_IP - append (thus all D's precedes A's) */
|
---|
| 654 | Htaccess_IP *prev_IP = ip_a_d;
|
---|
| 655 | if (prev_IP == NULL) {
|
---|
[1765] | 656 | ip_a_d = pip;
|
---|
| 657 | } else {
|
---|
[2725] | 658 | while (prev_IP->next)
|
---|
| 659 | prev_IP = prev_IP->next;
|
---|
| 660 | prev_IP->next = pip;
|
---|
[821] | 661 | }
|
---|
[1765] | 662 | }
|
---|
| 663 | continue;
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
[2725] | 667 | if (flag == FIRST_PARSE && ch == 'E') {
|
---|
| 668 | unsigned i;
|
---|
| 669 | int status = atoi(buf + 1); /* error status code */
|
---|
| 670 |
|
---|
[1765] | 671 | if (status < HTTP_CONTINUE) {
|
---|
[2725] | 672 | goto config_error;
|
---|
[821] | 673 | }
|
---|
[1765] | 674 | /* then error page; find matching status */
|
---|
| 675 | for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
---|
| 676 | if (http_response_type[i] == status) {
|
---|
[2725] | 677 | /* We chdir to home_httpd, thus no need to
|
---|
| 678 | * concat_path_file(home_httpd, after_colon)
|
---|
| 679 | * here */
|
---|
| 680 | http_error_page[i] = xstrdup(after_colon);
|
---|
[1765] | 681 | break;
|
---|
| 682 | }
|
---|
| 683 | }
|
---|
| 684 | continue;
|
---|
| 685 | }
|
---|
[821] | 686 | #endif
|
---|
| 687 |
|
---|
[2725] | 688 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 689 | if (flag == FIRST_PARSE && ch == 'P') {
|
---|
| 690 | /* P:/url:[http://]hostname[:port]/new/path */
|
---|
| 691 | char *url_from, *host_port, *url_to;
|
---|
| 692 | Htaccess_Proxy *proxy_entry;
|
---|
[1765] | 693 |
|
---|
[2725] | 694 | url_from = after_colon;
|
---|
| 695 | host_port = strchr(after_colon, ':');
|
---|
| 696 | if (host_port == NULL) {
|
---|
| 697 | goto config_error;
|
---|
[1765] | 698 | }
|
---|
[2725] | 699 | *host_port++ = '\0';
|
---|
| 700 | if (strncmp(host_port, "http://", 7) == 0)
|
---|
| 701 | host_port += 7;
|
---|
| 702 | if (*host_port == '\0') {
|
---|
| 703 | goto config_error;
|
---|
| 704 | }
|
---|
| 705 | url_to = strchr(host_port, '/');
|
---|
| 706 | if (url_to == NULL) {
|
---|
| 707 | goto config_error;
|
---|
| 708 | }
|
---|
| 709 | *url_to = '\0';
|
---|
| 710 | proxy_entry = xzalloc(sizeof(*proxy_entry));
|
---|
| 711 | proxy_entry->url_from = xstrdup(url_from);
|
---|
| 712 | proxy_entry->host_port = xstrdup(host_port);
|
---|
| 713 | *url_to = '/';
|
---|
| 714 | proxy_entry->url_to = xstrdup(url_to);
|
---|
| 715 | proxy_entry->next = proxy;
|
---|
| 716 | proxy = proxy_entry;
|
---|
| 717 | continue;
|
---|
[1765] | 718 | }
|
---|
[821] | 719 | #endif
|
---|
[2725] | 720 | /* the rest of directives are non-alphabetic,
|
---|
| 721 | * must avoid using "toupper'ed" ch */
|
---|
| 722 | ch = buf[0];
|
---|
[1765] | 723 |
|
---|
[2725] | 724 | if (ch == '.' /* ".ext:mime/type" */
|
---|
| 725 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 726 | || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
|
---|
| 727 | #endif
|
---|
| 728 | ) {
|
---|
| 729 | char *p;
|
---|
| 730 | Htaccess *cur;
|
---|
| 731 |
|
---|
| 732 | cur = xzalloc(sizeof(*cur) /* includes space for NUL */ + strlen_buf);
|
---|
| 733 | strcpy(cur->before_colon, buf);
|
---|
| 734 | p = cur->before_colon + (after_colon - buf);
|
---|
| 735 | p[-1] = '\0';
|
---|
| 736 | cur->after_colon = p;
|
---|
| 737 | if (ch == '.') {
|
---|
| 738 | /* .mime line: prepend to mime_a list */
|
---|
[1765] | 739 | cur->next = mime_a;
|
---|
| 740 | mime_a = cur;
|
---|
| 741 | }
|
---|
| 742 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
[2725] | 743 | else {
|
---|
| 744 | /* script interpreter line: prepend to script_i list */
|
---|
[1765] | 745 | cur->next = script_i;
|
---|
| 746 | script_i = cur;
|
---|
| 747 | }
|
---|
| 748 | #endif
|
---|
[2725] | 749 | continue;
|
---|
| 750 | }
|
---|
| 751 |
|
---|
[1765] | 752 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
[2725] | 753 | if (ch == '/') { /* "/file:user:pass" */
|
---|
| 754 | char *p;
|
---|
| 755 | Htaccess *cur;
|
---|
| 756 | unsigned file_len;
|
---|
[821] | 757 |
|
---|
[2725] | 758 | /* note: path is "" unless we are in SUBDIR parse,
|
---|
| 759 | * otherwise it does NOT start with "/" */
|
---|
| 760 | cur = xzalloc(sizeof(*cur) /* includes space for NUL */
|
---|
| 761 | + 1 + strlen(path)
|
---|
| 762 | + strlen_buf
|
---|
| 763 | );
|
---|
| 764 | /* form "/path/file" */
|
---|
| 765 | sprintf(cur->before_colon, "/%s%.*s",
|
---|
| 766 | path,
|
---|
| 767 | (int) (after_colon - buf - 1), /* includes "/", but not ":" */
|
---|
| 768 | buf);
|
---|
| 769 | /* canonicalize it */
|
---|
| 770 | p = bb_simplify_abs_path_inplace(cur->before_colon);
|
---|
| 771 | file_len = p - cur->before_colon;
|
---|
| 772 | /* add "user:pass" after NUL */
|
---|
| 773 | strcpy(++p, after_colon);
|
---|
| 774 | cur->after_colon = p;
|
---|
| 775 |
|
---|
| 776 | /* insert cur into g_auth */
|
---|
| 777 | /* g_auth is sorted by decreased filename length */
|
---|
| 778 | {
|
---|
| 779 | Htaccess *auth, **authp;
|
---|
| 780 |
|
---|
| 781 | authp = &g_auth;
|
---|
| 782 | while ((auth = *authp) != NULL) {
|
---|
| 783 | if (file_len >= strlen(auth->before_colon)) {
|
---|
| 784 | /* insert cur before auth */
|
---|
| 785 | cur->next = auth;
|
---|
[1765] | 786 | break;
|
---|
| 787 | }
|
---|
[2725] | 788 | authp = &auth->next;
|
---|
[1765] | 789 | }
|
---|
[2725] | 790 | *authp = cur;
|
---|
[821] | 791 | }
|
---|
[2725] | 792 | continue;
|
---|
[821] | 793 | }
|
---|
[2725] | 794 | #endif /* BASIC_AUTH */
|
---|
| 795 |
|
---|
| 796 | /* the line is not recognized */
|
---|
| 797 | config_error:
|
---|
| 798 | bb_error_msg("config error '%s' in '%s'", buf, filename);
|
---|
[3232] | 799 | } /* while (fgets) */
|
---|
[2725] | 800 |
|
---|
[3232] | 801 | fclose(f);
|
---|
[821] | 802 | }
|
---|
| 803 |
|
---|
[1765] | 804 | #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
---|
| 805 | /*
|
---|
| 806 | * Given a string, html-encode special characters.
|
---|
| 807 | * This is used for the -e command line option to provide an easy way
|
---|
| 808 | * for scripts to encode result data without confusing browsers. The
|
---|
| 809 | * returned string pointer is memory allocated by malloc().
|
---|
[821] | 810 | *
|
---|
[1765] | 811 | * Returns a pointer to the encoded string (malloced).
|
---|
| 812 | */
|
---|
[821] | 813 | static char *encodeString(const char *string)
|
---|
| 814 | {
|
---|
[1765] | 815 | /* take the simple route and encode everything */
|
---|
| 816 | /* could possibly scan once to get length. */
|
---|
| 817 | int len = strlen(string);
|
---|
| 818 | char *out = xmalloc(len * 6 + 1);
|
---|
| 819 | char *p = out;
|
---|
| 820 | char ch;
|
---|
[821] | 821 |
|
---|
[2725] | 822 | while ((ch = *string++) != '\0') {
|
---|
[1765] | 823 | /* very simple check for what to encode */
|
---|
| 824 | if (isalnum(ch))
|
---|
| 825 | *p++ = ch;
|
---|
| 826 | else
|
---|
| 827 | p += sprintf(p, "&#%d;", (unsigned char) ch);
|
---|
| 828 | }
|
---|
| 829 | *p = '\0';
|
---|
| 830 | return out;
|
---|
[821] | 831 | }
|
---|
[2725] | 832 | #endif
|
---|
[821] | 833 |
|
---|
[1765] | 834 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 835 | /*
|
---|
| 836 | * Decode a base64 data stream as per rfc1521.
|
---|
| 837 | * Note that the rfc states that non base64 chars are to be ignored.
|
---|
| 838 | * Since the decode always results in a shorter size than the input,
|
---|
| 839 | * it is OK to pass the input arg as an output arg.
|
---|
| 840 | * Parameter: a pointer to a base64 encoded string.
|
---|
| 841 | * Decoded data is stored in-place.
|
---|
| 842 | */
|
---|
[821] | 843 | static void decodeBase64(char *Data)
|
---|
| 844 | {
|
---|
[1765] | 845 | const unsigned char *in = (const unsigned char *)Data;
|
---|
| 846 | /* The decoded size will be at most 3/4 the size of the encoded */
|
---|
| 847 | unsigned ch = 0;
|
---|
| 848 | int i = 0;
|
---|
[821] | 849 |
|
---|
[1765] | 850 | while (*in) {
|
---|
| 851 | int t = *in++;
|
---|
[821] | 852 |
|
---|
[1765] | 853 | if (t >= '0' && t <= '9')
|
---|
| 854 | t = t - '0' + 52;
|
---|
| 855 | else if (t >= 'A' && t <= 'Z')
|
---|
| 856 | t = t - 'A';
|
---|
| 857 | else if (t >= 'a' && t <= 'z')
|
---|
| 858 | t = t - 'a' + 26;
|
---|
| 859 | else if (t == '+')
|
---|
| 860 | t = 62;
|
---|
| 861 | else if (t == '/')
|
---|
| 862 | t = 63;
|
---|
| 863 | else if (t == '=')
|
---|
| 864 | t = 0;
|
---|
| 865 | else
|
---|
| 866 | continue;
|
---|
[821] | 867 |
|
---|
[1765] | 868 | ch = (ch << 6) | t;
|
---|
| 869 | i++;
|
---|
| 870 | if (i == 4) {
|
---|
| 871 | *Data++ = (char) (ch >> 16);
|
---|
| 872 | *Data++ = (char) (ch >> 8);
|
---|
| 873 | *Data++ = (char) ch;
|
---|
| 874 | i = 0;
|
---|
| 875 | }
|
---|
| 876 | }
|
---|
| 877 | *Data = '\0';
|
---|
[821] | 878 | }
|
---|
| 879 | #endif
|
---|
| 880 |
|
---|
[1765] | 881 | /*
|
---|
| 882 | * Create a listen server socket on the designated port.
|
---|
| 883 | */
|
---|
[821] | 884 | static int openServer(void)
|
---|
| 885 | {
|
---|
[2725] | 886 | unsigned n = bb_strtou(bind_addr_or_port, NULL, 10);
|
---|
[1765] | 887 | if (!errno && n && n <= 0xffff)
|
---|
| 888 | n = create_and_bind_stream_or_die(NULL, n);
|
---|
| 889 | else
|
---|
| 890 | n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
|
---|
| 891 | xlisten(n, 9);
|
---|
| 892 | return n;
|
---|
| 893 | }
|
---|
[821] | 894 |
|
---|
[1765] | 895 | /*
|
---|
| 896 | * Log the connection closure and exit.
|
---|
| 897 | */
|
---|
[2725] | 898 | static void log_and_exit(void) NORETURN;
|
---|
[1765] | 899 | static void log_and_exit(void)
|
---|
| 900 | {
|
---|
| 901 | /* Paranoia. IE said to be buggy. It may send some extra data
|
---|
| 902 | * or be confused by us just exiting without SHUT_WR. Oh well. */
|
---|
| 903 | shutdown(1, SHUT_WR);
|
---|
[2725] | 904 | /* Why??
|
---|
| 905 | (this also messes up stdin when user runs httpd -i from terminal)
|
---|
[1765] | 906 | ndelay_on(0);
|
---|
[2725] | 907 | while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
|
---|
[1765] | 908 | continue;
|
---|
[2725] | 909 | */
|
---|
[1765] | 910 |
|
---|
| 911 | if (verbose > 2)
|
---|
| 912 | bb_error_msg("closed");
|
---|
| 913 | _exit(xfunc_error_retval);
|
---|
[821] | 914 | }
|
---|
| 915 |
|
---|
[1765] | 916 | /*
|
---|
| 917 | * Create and send HTTP response headers.
|
---|
| 918 | * The arguments are combined and sent as one write operation. Note that
|
---|
| 919 | * IE will puke big-time if the headers are not sent in one packet and the
|
---|
| 920 | * second packet is delayed for any reason.
|
---|
| 921 | * responseNum - the result code to send.
|
---|
| 922 | */
|
---|
| 923 | static void send_headers(int responseNum)
|
---|
[821] | 924 | {
|
---|
[1765] | 925 | static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
|
---|
[821] | 926 |
|
---|
[1765] | 927 | const char *responseString = "";
|
---|
| 928 | const char *infoString = NULL;
|
---|
| 929 | const char *mime_type;
|
---|
| 930 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
[2725] | 931 | const char *error_page = NULL;
|
---|
[1765] | 932 | #endif
|
---|
| 933 | unsigned i;
|
---|
[2725] | 934 | time_t timer = time(NULL);
|
---|
[1765] | 935 | char tmp_str[80];
|
---|
| 936 | int len;
|
---|
| 937 |
|
---|
| 938 | for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
|
---|
| 939 | if (http_response_type[i] == responseNum) {
|
---|
| 940 | responseString = http_response[i].name;
|
---|
| 941 | infoString = http_response[i].info;
|
---|
| 942 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
| 943 | error_page = http_error_page[i];
|
---|
| 944 | #endif
|
---|
[821] | 945 | break;
|
---|
| 946 | }
|
---|
[1765] | 947 | }
|
---|
| 948 | /* error message is HTML */
|
---|
| 949 | mime_type = responseNum == HTTP_OK ?
|
---|
| 950 | found_mime_type : "text/html";
|
---|
[821] | 951 |
|
---|
[1765] | 952 | if (verbose)
|
---|
| 953 | bb_error_msg("response:%u", responseNum);
|
---|
[821] | 954 |
|
---|
[1765] | 955 | /* emit the current date */
|
---|
| 956 | strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
|
---|
| 957 | len = sprintf(iobuf,
|
---|
| 958 | "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
|
---|
| 959 | "Date: %s\r\nConnection: close\r\n",
|
---|
| 960 | responseNum, responseString, mime_type, tmp_str);
|
---|
| 961 |
|
---|
| 962 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 963 | if (responseNum == HTTP_UNAUTHORIZED) {
|
---|
| 964 | len += sprintf(iobuf + len,
|
---|
| 965 | "WWW-Authenticate: Basic realm=\"%s\"\r\n",
|
---|
| 966 | g_realm);
|
---|
| 967 | }
|
---|
[821] | 968 | #endif
|
---|
[1765] | 969 | if (responseNum == HTTP_MOVED_TEMPORARILY) {
|
---|
| 970 | len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
|
---|
| 971 | found_moved_temporarily,
|
---|
| 972 | (g_query ? "?" : ""),
|
---|
| 973 | (g_query ? g_query : ""));
|
---|
| 974 | }
|
---|
[821] | 975 |
|
---|
[1765] | 976 | #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
|
---|
[2725] | 977 | if (error_page && access(error_page, R_OK) == 0) {
|
---|
[1765] | 978 | strcat(iobuf, "\r\n");
|
---|
| 979 | len += 2;
|
---|
| 980 |
|
---|
| 981 | if (DEBUG)
|
---|
| 982 | fprintf(stderr, "headers: '%s'\n", iobuf);
|
---|
[2725] | 983 | full_write(STDOUT_FILENO, iobuf, len);
|
---|
[1765] | 984 | if (DEBUG)
|
---|
| 985 | fprintf(stderr, "writing error page: '%s'\n", error_page);
|
---|
[2725] | 986 | return send_file_and_exit(error_page, SEND_BODY);
|
---|
[1765] | 987 | }
|
---|
[821] | 988 | #endif
|
---|
[1765] | 989 |
|
---|
[2725] | 990 | if (file_size != -1) { /* file */
|
---|
[1765] | 991 | strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
|
---|
[2725] | 992 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 993 | if (responseNum == HTTP_PARTIAL_CONTENT) {
|
---|
| 994 | len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
|
---|
| 995 | range_start,
|
---|
| 996 | range_end,
|
---|
| 997 | file_size);
|
---|
| 998 | file_size = range_end - range_start + 1;
|
---|
| 999 | }
|
---|
| 1000 | #endif
|
---|
| 1001 | len += sprintf(iobuf + len,
|
---|
| 1002 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 1003 | "Accept-Ranges: bytes\r\n"
|
---|
| 1004 | #endif
|
---|
| 1005 | "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
|
---|
| 1006 | tmp_str,
|
---|
| 1007 | content_gzip ? "Transfer-length:" : "Content-length:",
|
---|
| 1008 | file_size
|
---|
| 1009 | );
|
---|
[1765] | 1010 | }
|
---|
[2725] | 1011 |
|
---|
| 1012 | if (content_gzip)
|
---|
| 1013 | len += sprintf(iobuf + len, "Content-Encoding: gzip\r\n");
|
---|
| 1014 |
|
---|
[1765] | 1015 | iobuf[len++] = '\r';
|
---|
| 1016 | iobuf[len++] = '\n';
|
---|
| 1017 | if (infoString) {
|
---|
| 1018 | len += sprintf(iobuf + len,
|
---|
| 1019 | "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
|
---|
| 1020 | "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
|
---|
| 1021 | responseNum, responseString,
|
---|
| 1022 | responseNum, responseString, infoString);
|
---|
| 1023 | }
|
---|
| 1024 | if (DEBUG)
|
---|
| 1025 | fprintf(stderr, "headers: '%s'\n", iobuf);
|
---|
[2725] | 1026 | if (full_write(STDOUT_FILENO, iobuf, len) != len) {
|
---|
[1765] | 1027 | if (verbose > 1)
|
---|
| 1028 | bb_perror_msg("error");
|
---|
| 1029 | log_and_exit();
|
---|
| 1030 | }
|
---|
[821] | 1031 | }
|
---|
| 1032 |
|
---|
[2725] | 1033 | static void send_headers_and_exit(int responseNum) NORETURN;
|
---|
[1765] | 1034 | static void send_headers_and_exit(int responseNum)
|
---|
[821] | 1035 | {
|
---|
[3232] | 1036 | IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
|
---|
[1765] | 1037 | send_headers(responseNum);
|
---|
| 1038 | log_and_exit();
|
---|
| 1039 | }
|
---|
[821] | 1040 |
|
---|
[1765] | 1041 | /*
|
---|
| 1042 | * Read from the socket until '\n' or EOF. '\r' chars are removed.
|
---|
| 1043 | * '\n' is replaced with NUL.
|
---|
| 1044 | * Return number of characters read or 0 if nothing is read
|
---|
| 1045 | * ('\r' and '\n' are not counted).
|
---|
| 1046 | * Data is returned in iobuf.
|
---|
| 1047 | */
|
---|
| 1048 | static int get_line(void)
|
---|
| 1049 | {
|
---|
| 1050 | int count = 0;
|
---|
| 1051 | char c;
|
---|
| 1052 |
|
---|
[2725] | 1053 | alarm(HEADER_READ_TIMEOUT);
|
---|
[1765] | 1054 | while (1) {
|
---|
| 1055 | if (hdr_cnt <= 0) {
|
---|
[2725] | 1056 | hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
|
---|
[1765] | 1057 | if (hdr_cnt <= 0)
|
---|
| 1058 | break;
|
---|
| 1059 | hdr_ptr = hdr_buf;
|
---|
| 1060 | }
|
---|
| 1061 | iobuf[count] = c = *hdr_ptr++;
|
---|
| 1062 | hdr_cnt--;
|
---|
| 1063 |
|
---|
| 1064 | if (c == '\r')
|
---|
| 1065 | continue;
|
---|
| 1066 | if (c == '\n') {
|
---|
| 1067 | iobuf[count] = '\0';
|
---|
[2725] | 1068 | break;
|
---|
[1765] | 1069 | }
|
---|
| 1070 | if (count < (IOBUF_SIZE - 1)) /* check overflow */
|
---|
| 1071 | count++;
|
---|
| 1072 | }
|
---|
| 1073 | return count;
|
---|
[821] | 1074 | }
|
---|
| 1075 |
|
---|
[2725] | 1076 | #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1077 |
|
---|
| 1078 | /* gcc 4.2.1 fares better with NOINLINE */
|
---|
| 1079 | static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) NORETURN;
|
---|
| 1080 | static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
|
---|
| 1081 | {
|
---|
| 1082 | enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
|
---|
| 1083 | struct pollfd pfd[3];
|
---|
| 1084 | int out_cnt; /* we buffer a bit of initial CGI output */
|
---|
| 1085 | int count;
|
---|
| 1086 |
|
---|
| 1087 | /* iobuf is used for CGI -> network data,
|
---|
| 1088 | * hdr_buf is for network -> CGI data (POSTDATA) */
|
---|
| 1089 |
|
---|
| 1090 | /* If CGI dies, we still want to correctly finish reading its output
|
---|
| 1091 | * and send it to the peer. So please no SIGPIPEs! */
|
---|
| 1092 | signal(SIGPIPE, SIG_IGN);
|
---|
| 1093 |
|
---|
| 1094 | // We inconsistently handle a case when more POSTDATA from network
|
---|
| 1095 | // is coming than we expected. We may give *some part* of that
|
---|
| 1096 | // extra data to CGI.
|
---|
| 1097 |
|
---|
| 1098 | //if (hdr_cnt > post_len) {
|
---|
| 1099 | // /* We got more POSTDATA from network than we expected */
|
---|
| 1100 | // hdr_cnt = post_len;
|
---|
| 1101 | //}
|
---|
| 1102 | post_len -= hdr_cnt;
|
---|
| 1103 | /* post_len - number of POST bytes not yet read from network */
|
---|
| 1104 |
|
---|
| 1105 | /* NB: breaking out of this loop jumps to log_and_exit() */
|
---|
| 1106 | out_cnt = 0;
|
---|
| 1107 | while (1) {
|
---|
| 1108 | memset(pfd, 0, sizeof(pfd));
|
---|
| 1109 |
|
---|
| 1110 | pfd[FROM_CGI].fd = fromCgi_rd;
|
---|
| 1111 | pfd[FROM_CGI].events = POLLIN;
|
---|
| 1112 |
|
---|
| 1113 | if (toCgi_wr) {
|
---|
| 1114 | pfd[TO_CGI].fd = toCgi_wr;
|
---|
| 1115 | if (hdr_cnt > 0) {
|
---|
| 1116 | pfd[TO_CGI].events = POLLOUT;
|
---|
| 1117 | } else if (post_len > 0) {
|
---|
| 1118 | pfd[0].events = POLLIN;
|
---|
| 1119 | } else {
|
---|
| 1120 | /* post_len <= 0 && hdr_cnt <= 0:
|
---|
| 1121 | * no more POST data to CGI,
|
---|
| 1122 | * let CGI see EOF on CGI's stdin */
|
---|
| 1123 | if (toCgi_wr != fromCgi_rd)
|
---|
| 1124 | close(toCgi_wr);
|
---|
| 1125 | toCgi_wr = 0;
|
---|
| 1126 | }
|
---|
| 1127 | }
|
---|
| 1128 |
|
---|
| 1129 | /* Now wait on the set of sockets */
|
---|
| 1130 | count = safe_poll(pfd, toCgi_wr ? TO_CGI+1 : FROM_CGI+1, -1);
|
---|
| 1131 | if (count <= 0) {
|
---|
| 1132 | #if 0
|
---|
| 1133 | if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
|
---|
| 1134 | /* Weird. CGI didn't exit and no fd's
|
---|
| 1135 | * are ready, yet poll returned?! */
|
---|
| 1136 | continue;
|
---|
| 1137 | }
|
---|
| 1138 | if (DEBUG && WIFEXITED(status))
|
---|
| 1139 | bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
|
---|
| 1140 | if (DEBUG && WIFSIGNALED(status))
|
---|
| 1141 | bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
|
---|
| 1142 | #endif
|
---|
| 1143 | break;
|
---|
| 1144 | }
|
---|
| 1145 |
|
---|
| 1146 | if (pfd[TO_CGI].revents) {
|
---|
| 1147 | /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
|
---|
| 1148 | /* Have data from peer and can write to CGI */
|
---|
| 1149 | count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
|
---|
| 1150 | /* Doesn't happen, we dont use nonblocking IO here
|
---|
| 1151 | *if (count < 0 && errno == EAGAIN) {
|
---|
| 1152 | * ...
|
---|
| 1153 | *} else */
|
---|
| 1154 | if (count > 0) {
|
---|
| 1155 | hdr_ptr += count;
|
---|
| 1156 | hdr_cnt -= count;
|
---|
| 1157 | } else {
|
---|
| 1158 | /* EOF/broken pipe to CGI, stop piping POST data */
|
---|
| 1159 | hdr_cnt = post_len = 0;
|
---|
| 1160 | }
|
---|
| 1161 | }
|
---|
| 1162 |
|
---|
| 1163 | if (pfd[0].revents) {
|
---|
| 1164 | /* post_len > 0 && hdr_cnt == 0 here */
|
---|
| 1165 | /* We expect data, prev data portion is eaten by CGI
|
---|
| 1166 | * and there *is* data to read from the peer
|
---|
| 1167 | * (POSTDATA) */
|
---|
| 1168 | //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
|
---|
| 1169 | //count = safe_read(STDIN_FILENO, hdr_buf, count);
|
---|
| 1170 | count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
|
---|
| 1171 | if (count > 0) {
|
---|
| 1172 | hdr_cnt = count;
|
---|
| 1173 | hdr_ptr = hdr_buf;
|
---|
| 1174 | post_len -= count;
|
---|
| 1175 | } else {
|
---|
| 1176 | /* no more POST data can be read */
|
---|
| 1177 | post_len = 0;
|
---|
| 1178 | }
|
---|
| 1179 | }
|
---|
| 1180 |
|
---|
| 1181 | if (pfd[FROM_CGI].revents) {
|
---|
| 1182 | /* There is something to read from CGI */
|
---|
| 1183 | char *rbuf = iobuf;
|
---|
| 1184 |
|
---|
| 1185 | /* Are we still buffering CGI output? */
|
---|
| 1186 | if (out_cnt >= 0) {
|
---|
| 1187 | /* HTTP_200[] has single "\r\n" at the end.
|
---|
| 1188 | * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
|
---|
| 1189 | * CGI scripts MUST send their own header terminated by
|
---|
| 1190 | * empty line, then data. That's why we have only one
|
---|
| 1191 | * <cr><lf> pair here. We will output "200 OK" line
|
---|
| 1192 | * if needed, but CGI still has to provide blank line
|
---|
| 1193 | * between header and body */
|
---|
| 1194 |
|
---|
| 1195 | /* Must use safe_read, not full_read, because
|
---|
| 1196 | * CGI may output a few first bytes and then wait
|
---|
| 1197 | * for POSTDATA without closing stdout.
|
---|
| 1198 | * With full_read we may wait here forever. */
|
---|
| 1199 | count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
|
---|
| 1200 | if (count <= 0) {
|
---|
| 1201 | /* eof (or error) and there was no "HTTP",
|
---|
| 1202 | * so write it, then write received data */
|
---|
| 1203 | if (out_cnt) {
|
---|
| 1204 | full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
|
---|
| 1205 | full_write(STDOUT_FILENO, rbuf, out_cnt);
|
---|
| 1206 | }
|
---|
| 1207 | break; /* CGI stdout is closed, exiting */
|
---|
| 1208 | }
|
---|
| 1209 | out_cnt += count;
|
---|
| 1210 | count = 0;
|
---|
| 1211 | /* "Status" header format is: "Status: 302 Redirected\r\n" */
|
---|
| 1212 | if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
|
---|
| 1213 | /* send "HTTP/1.0 " */
|
---|
| 1214 | if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
|
---|
| 1215 | break;
|
---|
| 1216 | rbuf += 8; /* skip "Status: " */
|
---|
| 1217 | count = out_cnt - 8;
|
---|
| 1218 | out_cnt = -1; /* buffering off */
|
---|
| 1219 | } else if (out_cnt >= 4) {
|
---|
| 1220 | /* Did CGI add "HTTP"? */
|
---|
| 1221 | if (memcmp(rbuf, HTTP_200, 4) != 0) {
|
---|
| 1222 | /* there is no "HTTP", do it ourself */
|
---|
| 1223 | if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
|
---|
| 1224 | break;
|
---|
| 1225 | }
|
---|
| 1226 | /* Commented out:
|
---|
| 1227 | if (!strstr(rbuf, "ontent-")) {
|
---|
| 1228 | full_write(s, "Content-type: text/plain\r\n\r\n", 28);
|
---|
| 1229 | }
|
---|
| 1230 | * Counter-example of valid CGI without Content-type:
|
---|
| 1231 | * echo -en "HTTP/1.0 302 Found\r\n"
|
---|
| 1232 | * echo -en "Location: http://www.busybox.net\r\n"
|
---|
| 1233 | * echo -en "\r\n"
|
---|
| 1234 | */
|
---|
| 1235 | count = out_cnt;
|
---|
| 1236 | out_cnt = -1; /* buffering off */
|
---|
| 1237 | }
|
---|
| 1238 | } else {
|
---|
| 1239 | count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
|
---|
| 1240 | if (count <= 0)
|
---|
| 1241 | break; /* eof (or error) */
|
---|
| 1242 | }
|
---|
| 1243 | if (full_write(STDOUT_FILENO, rbuf, count) != count)
|
---|
| 1244 | break;
|
---|
| 1245 | if (DEBUG)
|
---|
| 1246 | fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
|
---|
| 1247 | } /* if (pfd[FROM_CGI].revents) */
|
---|
| 1248 | } /* while (1) */
|
---|
| 1249 | log_and_exit();
|
---|
| 1250 | }
|
---|
| 1251 | #endif
|
---|
| 1252 |
|
---|
[1765] | 1253 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
[2725] | 1254 |
|
---|
[1765] | 1255 | static void setenv1(const char *name, const char *value)
|
---|
| 1256 | {
|
---|
| 1257 | setenv(name, value ? value : "", 1);
|
---|
| 1258 | }
|
---|
[821] | 1259 |
|
---|
[1765] | 1260 | /*
|
---|
| 1261 | * Spawn CGI script, forward CGI's stdin/out <=> network
|
---|
[821] | 1262 | *
|
---|
[1765] | 1263 | * Environment variables are set up and the script is invoked with pipes
|
---|
[2725] | 1264 | * for stdin/stdout. If a POST is being done the script is fed the POST
|
---|
[1765] | 1265 | * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
|
---|
[821] | 1266 | *
|
---|
[1765] | 1267 | * Parameters:
|
---|
| 1268 | * const char *url The requested URL (with leading /).
|
---|
[3232] | 1269 | * const char *orig_uri The original URI before rewriting (if any)
|
---|
[2725] | 1270 | * int post_len Length of the POST body.
|
---|
[1765] | 1271 | * const char *cookie For set HTTP_COOKIE.
|
---|
| 1272 | * const char *content_type For set CONTENT_TYPE.
|
---|
| 1273 | */
|
---|
| 1274 | static void send_cgi_and_exit(
|
---|
| 1275 | const char *url,
|
---|
[3232] | 1276 | const char *orig_uri,
|
---|
[1765] | 1277 | const char *request,
|
---|
[2725] | 1278 | int post_len,
|
---|
[1765] | 1279 | const char *cookie,
|
---|
[2725] | 1280 | const char *content_type) NORETURN;
|
---|
[1765] | 1281 | static void send_cgi_and_exit(
|
---|
| 1282 | const char *url,
|
---|
[3232] | 1283 | const char *orig_uri,
|
---|
[1765] | 1284 | const char *request,
|
---|
[2725] | 1285 | int post_len,
|
---|
[1765] | 1286 | const char *cookie,
|
---|
| 1287 | const char *content_type)
|
---|
[821] | 1288 | {
|
---|
[2725] | 1289 | struct fd_pair fromCgi; /* CGI -> httpd pipe */
|
---|
| 1290 | struct fd_pair toCgi; /* httpd -> CGI pipe */
|
---|
[3232] | 1291 | char *script, *last_slash;
|
---|
[2725] | 1292 | int pid;
|
---|
[821] | 1293 |
|
---|
[2725] | 1294 | /* Make a copy. NB: caller guarantees:
|
---|
| 1295 | * url[0] == '/', url[1] != '/' */
|
---|
| 1296 | url = xstrdup(url);
|
---|
| 1297 |
|
---|
[1765] | 1298 | /*
|
---|
| 1299 | * We are mucking with environment _first_ and then vfork/exec,
|
---|
[2725] | 1300 | * this allows us to use vfork safely. Parent doesn't care about
|
---|
[1765] | 1301 | * these environment changes anyway.
|
---|
| 1302 | */
|
---|
[821] | 1303 |
|
---|
[2725] | 1304 | /* Check for [dirs/]script.cgi/PATH_INFO */
|
---|
[3232] | 1305 | last_slash = script = (char*)url;
|
---|
[1765] | 1306 | while ((script = strchr(script + 1, '/')) != NULL) {
|
---|
[3232] | 1307 | int dir;
|
---|
[1765] | 1308 | *script = '\0';
|
---|
[3232] | 1309 | dir = is_directory(url + 1, /*followlinks:*/ 1);
|
---|
| 1310 | *script = '/';
|
---|
| 1311 | if (!dir) {
|
---|
[1765] | 1312 | /* not directory, found script.cgi/PATH_INFO */
|
---|
| 1313 | break;
|
---|
| 1314 | }
|
---|
[3232] | 1315 | /* is directory, find next '/' */
|
---|
| 1316 | last_slash = script;
|
---|
[1765] | 1317 | }
|
---|
[2725] | 1318 | setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
|
---|
[1765] | 1319 | setenv1("REQUEST_METHOD", request);
|
---|
| 1320 | if (g_query) {
|
---|
[3232] | 1321 | putenv(xasprintf("%s=%s?%s", "REQUEST_URI", orig_uri, g_query));
|
---|
[1765] | 1322 | } else {
|
---|
[3232] | 1323 | setenv1("REQUEST_URI", orig_uri);
|
---|
[1765] | 1324 | }
|
---|
| 1325 | if (script != NULL)
|
---|
| 1326 | *script = '\0'; /* cut off /PATH_INFO */
|
---|
[821] | 1327 |
|
---|
[2725] | 1328 | /* SCRIPT_FILENAME is required by PHP in CGI mode */
|
---|
| 1329 | if (home_httpd[0] == '/') {
|
---|
| 1330 | char *fullpath = concat_path_file(home_httpd, url);
|
---|
| 1331 | setenv1("SCRIPT_FILENAME", fullpath);
|
---|
| 1332 | }
|
---|
[1765] | 1333 | /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
|
---|
[2725] | 1334 | setenv1("SCRIPT_NAME", url);
|
---|
[1765] | 1335 | /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
|
---|
| 1336 | * QUERY_STRING: The information which follows the ? in the URL
|
---|
| 1337 | * which referenced this script. This is the query information.
|
---|
| 1338 | * It should not be decoded in any fashion. This variable
|
---|
| 1339 | * should always be set when there is query information,
|
---|
| 1340 | * regardless of command line decoding. */
|
---|
| 1341 | /* (Older versions of bbox seem to do some decoding) */
|
---|
| 1342 | setenv1("QUERY_STRING", g_query);
|
---|
| 1343 | putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
|
---|
| 1344 | putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
|
---|
| 1345 | putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
|
---|
| 1346 | /* Having _separate_ variables for IP and port defeats
|
---|
| 1347 | * the purpose of having socket abstraction. Which "port"
|
---|
| 1348 | * are you using on Unix domain socket?
|
---|
| 1349 | * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
|
---|
| 1350 | * Oh well... */
|
---|
| 1351 | {
|
---|
| 1352 | char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
|
---|
| 1353 | char *cp = strrchr(p, ':');
|
---|
| 1354 | if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
|
---|
| 1355 | cp = NULL;
|
---|
| 1356 | if (cp) *cp = '\0'; /* delete :PORT */
|
---|
| 1357 | setenv1("REMOTE_ADDR", p);
|
---|
| 1358 | if (cp) {
|
---|
| 1359 | *cp = ':';
|
---|
| 1360 | #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
|
---|
| 1361 | setenv1("REMOTE_PORT", cp + 1);
|
---|
| 1362 | #endif
|
---|
| 1363 | }
|
---|
| 1364 | }
|
---|
| 1365 | setenv1("HTTP_USER_AGENT", user_agent);
|
---|
[2725] | 1366 | if (http_accept)
|
---|
| 1367 | setenv1("HTTP_ACCEPT", http_accept);
|
---|
| 1368 | if (http_accept_language)
|
---|
| 1369 | setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language);
|
---|
| 1370 | if (post_len)
|
---|
| 1371 | putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
|
---|
[1765] | 1372 | if (cookie)
|
---|
| 1373 | setenv1("HTTP_COOKIE", cookie);
|
---|
| 1374 | if (content_type)
|
---|
| 1375 | setenv1("CONTENT_TYPE", content_type);
|
---|
| 1376 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 1377 | if (remoteuser) {
|
---|
| 1378 | setenv1("REMOTE_USER", remoteuser);
|
---|
| 1379 | putenv((char*)"AUTH_TYPE=Basic");
|
---|
| 1380 | }
|
---|
| 1381 | #endif
|
---|
| 1382 | if (referer)
|
---|
| 1383 | setenv1("HTTP_REFERER", referer);
|
---|
[2725] | 1384 | setenv1("HTTP_HOST", host); /* set to "" if NULL */
|
---|
| 1385 | /* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
|
---|
| 1386 | * just run "env SERVER_NAME=xyz httpd ..." instead */
|
---|
[821] | 1387 |
|
---|
[2725] | 1388 | xpiped_pair(fromCgi);
|
---|
| 1389 | xpiped_pair(toCgi);
|
---|
[821] | 1390 |
|
---|
[1765] | 1391 | pid = vfork();
|
---|
| 1392 | if (pid < 0) {
|
---|
| 1393 | /* TODO: log perror? */
|
---|
| 1394 | log_and_exit();
|
---|
| 1395 | }
|
---|
[821] | 1396 |
|
---|
[3232] | 1397 | if (pid == 0) {
|
---|
[1765] | 1398 | /* Child process */
|
---|
[2725] | 1399 | char *argv[3];
|
---|
| 1400 |
|
---|
[1765] | 1401 | xfunc_error_retval = 242;
|
---|
[821] | 1402 |
|
---|
[2725] | 1403 | /* NB: close _first_, then move fds! */
|
---|
| 1404 | close(toCgi.wr);
|
---|
| 1405 | close(fromCgi.rd);
|
---|
[1765] | 1406 | xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
|
---|
| 1407 | xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
|
---|
| 1408 | /* User seeing stderr output can be a security problem.
|
---|
| 1409 | * If CGI really wants that, it can always do dup itself. */
|
---|
| 1410 | /* dup2(1, 2); */
|
---|
[821] | 1411 |
|
---|
[2725] | 1412 | /* Chdiring to script's dir */
|
---|
[3232] | 1413 | script = last_slash;
|
---|
[2725] | 1414 | if (script != url) { /* paranoia */
|
---|
| 1415 | *script = '\0';
|
---|
| 1416 | if (chdir(url + 1) != 0) {
|
---|
[3232] | 1417 | bb_perror_msg("can't change directory to '%s'", url + 1);
|
---|
[2725] | 1418 | goto error_execing_cgi;
|
---|
| 1419 | }
|
---|
| 1420 | // not needed: *script = '/';
|
---|
| 1421 | }
|
---|
| 1422 | script++;
|
---|
| 1423 |
|
---|
| 1424 | /* set argv[0] to name without path */
|
---|
| 1425 | argv[0] = script;
|
---|
| 1426 | argv[1] = NULL;
|
---|
| 1427 |
|
---|
[1765] | 1428 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
[2725] | 1429 | {
|
---|
| 1430 | char *suffix = strrchr(script, '.');
|
---|
[821] | 1431 |
|
---|
[1765] | 1432 | if (suffix) {
|
---|
| 1433 | Htaccess *cur;
|
---|
| 1434 | for (cur = script_i; cur; cur = cur->next) {
|
---|
| 1435 | if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
---|
[2725] | 1436 | /* found interpreter name */
|
---|
| 1437 | argv[0] = cur->after_colon;
|
---|
| 1438 | argv[1] = script;
|
---|
| 1439 | argv[2] = NULL;
|
---|
[1765] | 1440 | break;
|
---|
| 1441 | }
|
---|
[821] | 1442 | }
|
---|
[1765] | 1443 | }
|
---|
[2725] | 1444 | }
|
---|
[821] | 1445 | #endif
|
---|
[2725] | 1446 | /* restore default signal dispositions for CGI process */
|
---|
| 1447 | bb_signals(0
|
---|
| 1448 | | (1 << SIGCHLD)
|
---|
| 1449 | | (1 << SIGPIPE)
|
---|
| 1450 | | (1 << SIGHUP)
|
---|
| 1451 | , SIG_DFL);
|
---|
| 1452 |
|
---|
| 1453 | /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
|
---|
| 1454 | * without any dir components and will only match a file
|
---|
| 1455 | * in the current directory */
|
---|
| 1456 | execv(argv[0], argv);
|
---|
| 1457 | if (verbose)
|
---|
| 1458 | bb_perror_msg("can't execute '%s'", argv[0]);
|
---|
[1765] | 1459 | error_execing_cgi:
|
---|
| 1460 | /* send to stdout
|
---|
| 1461 | * (we are CGI here, our stdout is pumped to the net) */
|
---|
| 1462 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
| 1463 | } /* end child */
|
---|
[821] | 1464 |
|
---|
[1765] | 1465 | /* Parent process */
|
---|
[821] | 1466 |
|
---|
[2725] | 1467 | /* Restore variables possibly changed by child */
|
---|
[1765] | 1468 | xfunc_error_retval = 0;
|
---|
[821] | 1469 |
|
---|
[2725] | 1470 | /* Pump data */
|
---|
[1765] | 1471 | close(fromCgi.wr);
|
---|
| 1472 | close(toCgi.rd);
|
---|
[2725] | 1473 | cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
|
---|
| 1474 | }
|
---|
[821] | 1475 |
|
---|
[1765] | 1476 | #endif /* FEATURE_HTTPD_CGI */
|
---|
[821] | 1477 |
|
---|
[1765] | 1478 | /*
|
---|
| 1479 | * Send a file response to a HTTP request, and exit
|
---|
[2725] | 1480 | *
|
---|
[1765] | 1481 | * Parameters:
|
---|
[2725] | 1482 | * const char *url The requested URL (with leading /).
|
---|
| 1483 | * what What to send (headers/body/both).
|
---|
[1765] | 1484 | */
|
---|
[2725] | 1485 | static NOINLINE void send_file_and_exit(const char *url, int what)
|
---|
[821] | 1486 | {
|
---|
[1765] | 1487 | char *suffix;
|
---|
[2725] | 1488 | int fd;
|
---|
[1765] | 1489 | ssize_t count;
|
---|
[821] | 1490 |
|
---|
[2725] | 1491 | if (content_gzip) {
|
---|
| 1492 | /* does <url>.gz exist? Then use it instead */
|
---|
| 1493 | char *gzurl = xasprintf("%s.gz", url);
|
---|
| 1494 | fd = open(gzurl, O_RDONLY);
|
---|
| 1495 | free(gzurl);
|
---|
| 1496 | if (fd != -1) {
|
---|
| 1497 | struct stat sb;
|
---|
| 1498 | fstat(fd, &sb);
|
---|
| 1499 | file_size = sb.st_size;
|
---|
| 1500 | last_mod = sb.st_mtime;
|
---|
| 1501 | } else {
|
---|
| 1502 | IF_FEATURE_HTTPD_GZIP(content_gzip = 0;)
|
---|
| 1503 | fd = open(url, O_RDONLY);
|
---|
| 1504 | }
|
---|
| 1505 | } else {
|
---|
| 1506 | fd = open(url, O_RDONLY);
|
---|
| 1507 | }
|
---|
| 1508 | if (fd < 0) {
|
---|
| 1509 | if (DEBUG)
|
---|
| 1510 | bb_perror_msg("can't open '%s'", url);
|
---|
| 1511 | /* Error pages are sent by using send_file_and_exit(SEND_BODY).
|
---|
| 1512 | * IOW: it is unsafe to call send_headers_and_exit
|
---|
| 1513 | * if what is SEND_BODY! Can recurse! */
|
---|
| 1514 | if (what != SEND_BODY)
|
---|
| 1515 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
| 1516 | log_and_exit();
|
---|
| 1517 | }
|
---|
| 1518 | /* If you want to know about EPIPE below
|
---|
| 1519 | * (happens if you abort downloads from local httpd): */
|
---|
| 1520 | signal(SIGPIPE, SIG_IGN);
|
---|
[1765] | 1521 |
|
---|
[2725] | 1522 | /* If not found, default is "application/octet-stream" */
|
---|
[1765] | 1523 | found_mime_type = "application/octet-stream";
|
---|
[2725] | 1524 | suffix = strrchr(url, '.');
|
---|
[1765] | 1525 | if (suffix) {
|
---|
[2725] | 1526 | static const char suffixTable[] ALIGN1 =
|
---|
| 1527 | /* Shorter suffix must be first:
|
---|
| 1528 | * ".html.htm" will fail for ".htm"
|
---|
| 1529 | */
|
---|
| 1530 | ".txt.h.c.cc.cpp\0" "text/plain\0"
|
---|
| 1531 | /* .htm line must be after .h line */
|
---|
| 1532 | ".htm.html\0" "text/html\0"
|
---|
| 1533 | ".jpg.jpeg\0" "image/jpeg\0"
|
---|
| 1534 | ".gif\0" "image/gif\0"
|
---|
| 1535 | ".png\0" "image/png\0"
|
---|
| 1536 | /* .css line must be after .c line */
|
---|
| 1537 | ".css\0" "text/css\0"
|
---|
| 1538 | ".wav\0" "audio/wav\0"
|
---|
| 1539 | ".avi\0" "video/x-msvideo\0"
|
---|
| 1540 | ".qt.mov\0" "video/quicktime\0"
|
---|
| 1541 | ".mpe.mpeg\0" "video/mpeg\0"
|
---|
| 1542 | ".mid.midi\0" "audio/midi\0"
|
---|
| 1543 | ".mp3\0" "audio/mpeg\0"
|
---|
| 1544 | #if 0 /* unpopular */
|
---|
| 1545 | ".au\0" "audio/basic\0"
|
---|
| 1546 | ".pac\0" "application/x-ns-proxy-autoconfig\0"
|
---|
| 1547 | ".vrml.wrl\0" "model/vrml\0"
|
---|
| 1548 | #endif
|
---|
| 1549 | /* compiler adds another "\0" here */
|
---|
| 1550 | ;
|
---|
[1765] | 1551 | Htaccess *cur;
|
---|
[2725] | 1552 |
|
---|
| 1553 | /* Examine built-in table */
|
---|
| 1554 | const char *table = suffixTable;
|
---|
| 1555 | const char *table_next;
|
---|
| 1556 | for (; *table; table = table_next) {
|
---|
| 1557 | const char *try_suffix;
|
---|
| 1558 | const char *mime_type;
|
---|
| 1559 | mime_type = table + strlen(table) + 1;
|
---|
| 1560 | table_next = mime_type + strlen(mime_type) + 1;
|
---|
| 1561 | try_suffix = strstr(table, suffix);
|
---|
| 1562 | if (!try_suffix)
|
---|
| 1563 | continue;
|
---|
| 1564 | try_suffix += strlen(suffix);
|
---|
| 1565 | if (*try_suffix == '\0' || *try_suffix == '.') {
|
---|
| 1566 | found_mime_type = mime_type;
|
---|
| 1567 | break;
|
---|
[1765] | 1568 | }
|
---|
[2725] | 1569 | /* Example: strstr(table, ".av") != NULL, but it
|
---|
| 1570 | * does not match ".avi" after all and we end up here.
|
---|
| 1571 | * The table is arranged so that in this case we know
|
---|
| 1572 | * that it can't match anything in the following lines,
|
---|
| 1573 | * and we stop the search: */
|
---|
| 1574 | break;
|
---|
[1765] | 1575 | }
|
---|
[2725] | 1576 | /* ...then user's table */
|
---|
[1765] | 1577 | for (cur = mime_a; cur; cur = cur->next) {
|
---|
| 1578 | if (strcmp(cur->before_colon, suffix) == 0) {
|
---|
| 1579 | found_mime_type = cur->after_colon;
|
---|
| 1580 | break;
|
---|
| 1581 | }
|
---|
| 1582 | }
|
---|
[821] | 1583 | }
|
---|
| 1584 |
|
---|
[1765] | 1585 | if (DEBUG)
|
---|
| 1586 | bb_error_msg("sending file '%s' content-type: %s",
|
---|
| 1587 | url, found_mime_type);
|
---|
| 1588 |
|
---|
[2725] | 1589 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 1590 | if (what == SEND_BODY /* err pages and ranges don't mix */
|
---|
| 1591 | || content_gzip /* we are sending compressed page: can't do ranges */ ///why?
|
---|
| 1592 | ) {
|
---|
[3232] | 1593 | range_start = -1;
|
---|
[821] | 1594 | }
|
---|
[2725] | 1595 | range_len = MAXINT(off_t);
|
---|
[3232] | 1596 | if (range_start >= 0) {
|
---|
| 1597 | if (!range_end || range_end > file_size - 1) {
|
---|
[2725] | 1598 | range_end = file_size - 1;
|
---|
| 1599 | }
|
---|
| 1600 | if (range_end < range_start
|
---|
| 1601 | || lseek(fd, range_start, SEEK_SET) != range_start
|
---|
| 1602 | ) {
|
---|
| 1603 | lseek(fd, 0, SEEK_SET);
|
---|
[3232] | 1604 | range_start = -1;
|
---|
[2725] | 1605 | } else {
|
---|
| 1606 | range_len = range_end - range_start + 1;
|
---|
| 1607 | send_headers(HTTP_PARTIAL_CONTENT);
|
---|
| 1608 | what = SEND_BODY;
|
---|
| 1609 | }
|
---|
| 1610 | }
|
---|
| 1611 | #endif
|
---|
| 1612 | if (what & SEND_HEADERS)
|
---|
[1765] | 1613 | send_headers(HTTP_OK);
|
---|
| 1614 | #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
|
---|
[2725] | 1615 | {
|
---|
| 1616 | off_t offset = range_start;
|
---|
| 1617 | while (1) {
|
---|
| 1618 | /* sz is rounded down to 64k */
|
---|
| 1619 | ssize_t sz = MAXINT(ssize_t) - 0xffff;
|
---|
| 1620 | IF_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
|
---|
| 1621 | count = sendfile(STDOUT_FILENO, fd, &offset, sz);
|
---|
| 1622 | if (count < 0) {
|
---|
| 1623 | if (offset == range_start)
|
---|
| 1624 | break; /* fall back to read/write loop */
|
---|
| 1625 | goto fin;
|
---|
| 1626 | }
|
---|
[3232] | 1627 | IF_FEATURE_HTTPD_RANGES(range_len -= count;)
|
---|
[2725] | 1628 | if (count == 0 || range_len == 0)
|
---|
| 1629 | log_and_exit();
|
---|
[1765] | 1630 | }
|
---|
[2725] | 1631 | }
|
---|
[1765] | 1632 | #endif
|
---|
[2725] | 1633 | while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
|
---|
| 1634 | ssize_t n;
|
---|
| 1635 | IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
|
---|
| 1636 | n = full_write(STDOUT_FILENO, iobuf, count);
|
---|
[1765] | 1637 | if (count != n)
|
---|
[821] | 1638 | break;
|
---|
[2725] | 1639 | IF_FEATURE_HTTPD_RANGES(range_len -= count;)
|
---|
| 1640 | if (range_len == 0)
|
---|
| 1641 | break;
|
---|
[821] | 1642 | }
|
---|
[2725] | 1643 | if (count < 0) {
|
---|
| 1644 | IF_FEATURE_HTTPD_USE_SENDFILE(fin:)
|
---|
| 1645 | if (verbose > 1)
|
---|
| 1646 | bb_perror_msg("error");
|
---|
| 1647 | }
|
---|
[1765] | 1648 | log_and_exit();
|
---|
[821] | 1649 | }
|
---|
| 1650 |
|
---|
| 1651 | static int checkPermIP(void)
|
---|
| 1652 | {
|
---|
[1765] | 1653 | Htaccess_IP *cur;
|
---|
[821] | 1654 |
|
---|
[1765] | 1655 | for (cur = ip_a_d; cur; cur = cur->next) {
|
---|
[821] | 1656 | #if DEBUG
|
---|
[1765] | 1657 | fprintf(stderr,
|
---|
| 1658 | "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
|
---|
| 1659 | rmt_ip_str,
|
---|
| 1660 | (unsigned char)(cur->ip >> 24),
|
---|
| 1661 | (unsigned char)(cur->ip >> 16),
|
---|
| 1662 | (unsigned char)(cur->ip >> 8),
|
---|
| 1663 | (unsigned char)(cur->ip),
|
---|
| 1664 | (unsigned char)(cur->mask >> 24),
|
---|
| 1665 | (unsigned char)(cur->mask >> 16),
|
---|
| 1666 | (unsigned char)(cur->mask >> 8),
|
---|
| 1667 | (unsigned char)(cur->mask)
|
---|
| 1668 | );
|
---|
[821] | 1669 | #endif
|
---|
[1765] | 1670 | if ((rmt_ip & cur->mask) == cur->ip)
|
---|
[2725] | 1671 | return (cur->allow_deny == 'A'); /* A -> 1 */
|
---|
[1765] | 1672 | }
|
---|
[821] | 1673 |
|
---|
[2725] | 1674 | return !flg_deny_all; /* depends on whether we saw "D:*" */
|
---|
[821] | 1675 | }
|
---|
| 1676 |
|
---|
[1765] | 1677 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
[3232] | 1678 |
|
---|
| 1679 | # if ENABLE_PAM
|
---|
| 1680 | struct pam_userinfo {
|
---|
| 1681 | const char *name;
|
---|
| 1682 | const char *pw;
|
---|
| 1683 | };
|
---|
| 1684 |
|
---|
| 1685 | static int pam_talker(int num_msg,
|
---|
| 1686 | const struct pam_message **msg,
|
---|
| 1687 | struct pam_response **resp,
|
---|
| 1688 | void *appdata_ptr)
|
---|
| 1689 | {
|
---|
| 1690 | int i;
|
---|
| 1691 | struct pam_userinfo *userinfo = (struct pam_userinfo *) appdata_ptr;
|
---|
| 1692 | struct pam_response *response;
|
---|
| 1693 |
|
---|
| 1694 | if (!resp || !msg || !userinfo)
|
---|
| 1695 | return PAM_CONV_ERR;
|
---|
| 1696 |
|
---|
| 1697 | /* allocate memory to store response */
|
---|
| 1698 | response = xzalloc(num_msg * sizeof(*response));
|
---|
| 1699 |
|
---|
| 1700 | /* copy values */
|
---|
| 1701 | for (i = 0; i < num_msg; i++) {
|
---|
| 1702 | const char *s;
|
---|
| 1703 |
|
---|
| 1704 | switch (msg[i]->msg_style) {
|
---|
| 1705 | case PAM_PROMPT_ECHO_ON:
|
---|
| 1706 | s = userinfo->name;
|
---|
| 1707 | break;
|
---|
| 1708 | case PAM_PROMPT_ECHO_OFF:
|
---|
| 1709 | s = userinfo->pw;
|
---|
| 1710 | break;
|
---|
| 1711 | case PAM_ERROR_MSG:
|
---|
| 1712 | case PAM_TEXT_INFO:
|
---|
| 1713 | s = "";
|
---|
| 1714 | break;
|
---|
| 1715 | default:
|
---|
| 1716 | free(response);
|
---|
| 1717 | return PAM_CONV_ERR;
|
---|
| 1718 | }
|
---|
| 1719 | response[i].resp = xstrdup(s);
|
---|
| 1720 | if (PAM_SUCCESS != 0)
|
---|
| 1721 | response[i].resp_retcode = PAM_SUCCESS;
|
---|
| 1722 | }
|
---|
| 1723 | *resp = response;
|
---|
| 1724 | return PAM_SUCCESS;
|
---|
| 1725 | }
|
---|
| 1726 | # endif
|
---|
| 1727 |
|
---|
[1765] | 1728 | /*
|
---|
[2725] | 1729 | * Config file entries are of the form "/<path>:<user>:<passwd>".
|
---|
| 1730 | * If config file has no prefix match for path, access is allowed.
|
---|
[821] | 1731 | *
|
---|
[2725] | 1732 | * path The file path
|
---|
| 1733 | * user_and_passwd "user:passwd" to validate
|
---|
[821] | 1734 | *
|
---|
[2725] | 1735 | * Returns 1 if user_and_passwd is OK.
|
---|
[1765] | 1736 | */
|
---|
[3232] | 1737 | static int check_user_passwd(const char *path, char *user_and_passwd)
|
---|
[821] | 1738 | {
|
---|
[1765] | 1739 | Htaccess *cur;
|
---|
| 1740 | const char *prev = NULL;
|
---|
[821] | 1741 |
|
---|
[1765] | 1742 | for (cur = g_auth; cur; cur = cur->next) {
|
---|
[2725] | 1743 | const char *dir_prefix;
|
---|
| 1744 | size_t len;
|
---|
[3232] | 1745 | int r;
|
---|
[821] | 1746 |
|
---|
[2725] | 1747 | dir_prefix = cur->before_colon;
|
---|
| 1748 |
|
---|
| 1749 | /* WHY? */
|
---|
| 1750 | /* If already saw a match, don't accept other different matches */
|
---|
| 1751 | if (prev && strcmp(prev, dir_prefix) != 0)
|
---|
| 1752 | continue;
|
---|
| 1753 |
|
---|
[1765] | 1754 | if (DEBUG)
|
---|
[2725] | 1755 | fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);
|
---|
[1765] | 1756 |
|
---|
[2725] | 1757 | /* If it's not a prefix match, continue searching */
|
---|
| 1758 | len = strlen(dir_prefix);
|
---|
| 1759 | if (len != 1 /* dir_prefix "/" matches all, don't need to check */
|
---|
| 1760 | && (strncmp(dir_prefix, path, len) != 0
|
---|
[3232] | 1761 | || (path[len] != '/' && path[len] != '\0')
|
---|
| 1762 | )
|
---|
[1765] | 1763 | ) {
|
---|
[2725] | 1764 | continue;
|
---|
| 1765 | }
|
---|
[821] | 1766 |
|
---|
[2725] | 1767 | /* Path match found */
|
---|
| 1768 | prev = dir_prefix;
|
---|
[821] | 1769 |
|
---|
[2725] | 1770 | if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
|
---|
[3232] | 1771 | char *colon_after_user;
|
---|
| 1772 | const char *passwd;
|
---|
| 1773 | # if ENABLE_FEATURE_SHADOWPASSWDS && !ENABLE_PAM
|
---|
| 1774 | char sp_buf[256];
|
---|
| 1775 | # endif
|
---|
[2725] | 1776 |
|
---|
[3232] | 1777 | colon_after_user = strchr(user_and_passwd, ':');
|
---|
| 1778 | if (!colon_after_user)
|
---|
| 1779 | goto bad_input;
|
---|
| 1780 |
|
---|
| 1781 | /* compare "user:" */
|
---|
| 1782 | if (cur->after_colon[0] != '*'
|
---|
| 1783 | && strncmp(cur->after_colon, user_and_passwd,
|
---|
| 1784 | colon_after_user - user_and_passwd + 1) != 0
|
---|
[2725] | 1785 | ) {
|
---|
[3232] | 1786 | continue;
|
---|
| 1787 | }
|
---|
| 1788 | /* this cfg entry is '*' or matches username from peer */
|
---|
[2725] | 1789 |
|
---|
[3232] | 1790 | passwd = strchr(cur->after_colon, ':');
|
---|
| 1791 | if (!passwd)
|
---|
| 1792 | goto bad_input;
|
---|
| 1793 | passwd++;
|
---|
| 1794 | if (passwd[0] == '*') {
|
---|
| 1795 | # if ENABLE_PAM
|
---|
| 1796 | struct pam_userinfo userinfo;
|
---|
| 1797 | struct pam_conv conv_info = { &pam_talker, (void *) &userinfo };
|
---|
| 1798 | pam_handle_t *pamh;
|
---|
| 1799 |
|
---|
| 1800 | *colon_after_user = '\0';
|
---|
| 1801 | userinfo.name = user_and_passwd;
|
---|
| 1802 | userinfo.pw = colon_after_user + 1;
|
---|
| 1803 | r = pam_start("httpd", user_and_passwd, &conv_info, &pamh) != PAM_SUCCESS;
|
---|
| 1804 | if (r == 0) {
|
---|
| 1805 | r = pam_authenticate(pamh, PAM_DISALLOW_NULL_AUTHTOK) != PAM_SUCCESS
|
---|
| 1806 | || pam_acct_mgmt(pamh, PAM_DISALLOW_NULL_AUTHTOK) != PAM_SUCCESS
|
---|
| 1807 | ;
|
---|
| 1808 | pam_end(pamh, PAM_SUCCESS);
|
---|
| 1809 | }
|
---|
| 1810 | *colon_after_user = ':';
|
---|
| 1811 | goto end_check_passwd;
|
---|
| 1812 | # else
|
---|
| 1813 | # if ENABLE_FEATURE_SHADOWPASSWDS
|
---|
| 1814 | /* Using _r function to avoid pulling in static buffers */
|
---|
| 1815 | struct spwd spw;
|
---|
| 1816 | # endif
|
---|
| 1817 | struct passwd *pw;
|
---|
| 1818 |
|
---|
| 1819 | *colon_after_user = '\0';
|
---|
| 1820 | pw = getpwnam(user_and_passwd);
|
---|
| 1821 | *colon_after_user = ':';
|
---|
| 1822 | if (!pw || !pw->pw_passwd)
|
---|
[1765] | 1823 | continue;
|
---|
[3232] | 1824 | passwd = pw->pw_passwd;
|
---|
| 1825 | # if ENABLE_FEATURE_SHADOWPASSWDS
|
---|
| 1826 | if ((passwd[0] == 'x' || passwd[0] == '*') && !passwd[1]) {
|
---|
| 1827 | /* getspnam_r may return 0 yet set result to NULL.
|
---|
| 1828 | * At least glibc 2.4 does this. Be extra paranoid here. */
|
---|
| 1829 | struct spwd *result = NULL;
|
---|
| 1830 | r = getspnam_r(pw->pw_name, &spw, sp_buf, sizeof(sp_buf), &result);
|
---|
| 1831 | if (r == 0 && result)
|
---|
| 1832 | passwd = result->sp_pwdp;
|
---|
[1765] | 1833 | }
|
---|
[3232] | 1834 | # endif
|
---|
| 1835 | /* In this case, passwd is ALWAYS encrypted:
|
---|
| 1836 | * it came from /etc/passwd or /etc/shadow!
|
---|
| 1837 | */
|
---|
| 1838 | goto check_encrypted;
|
---|
| 1839 | # endif /* ENABLE_PAM */
|
---|
| 1840 | }
|
---|
| 1841 | /* Else: passwd is from httpd.conf, it is either plaintext or encrypted */
|
---|
[2725] | 1842 |
|
---|
[3232] | 1843 | if (passwd[0] == '$' && isdigit(passwd[1])) {
|
---|
| 1844 | char *encrypted;
|
---|
| 1845 | # if !ENABLE_PAM
|
---|
| 1846 | check_encrypted:
|
---|
| 1847 | # endif
|
---|
| 1848 | /* encrypt pwd from peer and check match with local one */
|
---|
[2725] | 1849 | encrypted = pw_encrypt(
|
---|
[3232] | 1850 | /* pwd (from peer): */ colon_after_user + 1,
|
---|
| 1851 | /* salt: */ passwd,
|
---|
| 1852 | /* cleanup: */ 0
|
---|
| 1853 | );
|
---|
| 1854 | r = strcmp(encrypted, passwd);
|
---|
[2725] | 1855 | free(encrypted);
|
---|
[3232] | 1856 | } else {
|
---|
| 1857 | /* local passwd is from httpd.conf and it's plaintext */
|
---|
| 1858 | r = strcmp(colon_after_user + 1, passwd);
|
---|
[821] | 1859 | }
|
---|
[3232] | 1860 | goto end_check_passwd;
|
---|
[2725] | 1861 | }
|
---|
[3232] | 1862 | bad_input:
|
---|
[2725] | 1863 | /* Comparing plaintext "user:pass" in one go */
|
---|
[3232] | 1864 | r = strcmp(cur->after_colon, user_and_passwd);
|
---|
| 1865 | end_check_passwd:
|
---|
| 1866 | if (r == 0) {
|
---|
[2725] | 1867 | remoteuser = xstrndup(user_and_passwd,
|
---|
[3232] | 1868 | strchrnul(user_and_passwd, ':') - user_and_passwd
|
---|
| 1869 | );
|
---|
[2725] | 1870 | return 1; /* Ok */
|
---|
[821] | 1871 | }
|
---|
[1765] | 1872 | } /* for */
|
---|
[821] | 1873 |
|
---|
[2725] | 1874 | /* 0(bad) if prev is set: matches were found but passwd was wrong */
|
---|
| 1875 | return (prev == NULL);
|
---|
[821] | 1876 | }
|
---|
[1765] | 1877 | #endif /* FEATURE_HTTPD_BASIC_AUTH */
|
---|
[821] | 1878 |
|
---|
[2725] | 1879 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1880 | static Htaccess_Proxy *find_proxy_entry(const char *url)
|
---|
| 1881 | {
|
---|
| 1882 | Htaccess_Proxy *p;
|
---|
| 1883 | for (p = proxy; p; p = p->next) {
|
---|
| 1884 | if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
|
---|
| 1885 | return p;
|
---|
| 1886 | }
|
---|
| 1887 | return NULL;
|
---|
| 1888 | }
|
---|
| 1889 | #endif
|
---|
| 1890 |
|
---|
[1765] | 1891 | /*
|
---|
| 1892 | * Handle timeouts
|
---|
| 1893 | */
|
---|
[2725] | 1894 | static void send_REQUEST_TIMEOUT_and_exit(int sig) NORETURN;
|
---|
| 1895 | static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM)
|
---|
[821] | 1896 | {
|
---|
[1765] | 1897 | send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
|
---|
[821] | 1898 | }
|
---|
| 1899 |
|
---|
[1765] | 1900 | /*
|
---|
| 1901 | * Handle an incoming http request and exit.
|
---|
| 1902 | */
|
---|
[2725] | 1903 | static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) NORETURN;
|
---|
[1765] | 1904 | static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
|
---|
[821] | 1905 | {
|
---|
[1765] | 1906 | static const char request_GET[] ALIGN1 = "GET";
|
---|
| 1907 | struct stat sb;
|
---|
| 1908 | char *urlcopy;
|
---|
| 1909 | char *urlp;
|
---|
| 1910 | char *tptr;
|
---|
| 1911 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
[2725] | 1912 | static const char request_HEAD[] ALIGN1 = "HEAD";
|
---|
[1765] | 1913 | const char *prequest;
|
---|
[2725] | 1914 | char *cookie = NULL;
|
---|
| 1915 | char *content_type = NULL;
|
---|
[1765] | 1916 | unsigned long length = 0;
|
---|
[2725] | 1917 | #elif ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1918 | #define prequest request_GET
|
---|
| 1919 | unsigned long length = 0;
|
---|
[821] | 1920 | #endif
|
---|
[1765] | 1921 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
[2725] | 1922 | smallint authorized = -1;
|
---|
[1765] | 1923 | #endif
|
---|
[2725] | 1924 | smallint ip_allowed;
|
---|
| 1925 | char http_major_version;
|
---|
| 1926 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 1927 | char http_minor_version;
|
---|
| 1928 | char *header_buf = header_buf; /* for gcc */
|
---|
| 1929 | char *header_ptr = header_ptr;
|
---|
| 1930 | Htaccess_Proxy *proxy_entry;
|
---|
| 1931 | #endif
|
---|
[821] | 1932 |
|
---|
[1765] | 1933 | /* Allocation of iobuf is postponed until now
|
---|
| 1934 | * (IOW, server process doesn't need to waste 8k) */
|
---|
| 1935 | iobuf = xmalloc(IOBUF_SIZE);
|
---|
| 1936 |
|
---|
| 1937 | rmt_ip = 0;
|
---|
[2725] | 1938 | if (fromAddr->u.sa.sa_family == AF_INET) {
|
---|
| 1939 | rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
|
---|
[1765] | 1940 | }
|
---|
| 1941 | #if ENABLE_FEATURE_IPV6
|
---|
[2725] | 1942 | if (fromAddr->u.sa.sa_family == AF_INET6
|
---|
| 1943 | && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
|
---|
| 1944 | && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
|
---|
| 1945 | && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
|
---|
| 1946 | rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
|
---|
[821] | 1947 | #endif
|
---|
[1765] | 1948 | if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
|
---|
[2725] | 1949 | /* NB: can be NULL (user runs httpd -i by hand?) */
|
---|
| 1950 | rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
|
---|
[1765] | 1951 | }
|
---|
| 1952 | if (verbose) {
|
---|
| 1953 | /* this trick makes -v logging much simpler */
|
---|
[2725] | 1954 | if (rmt_ip_str)
|
---|
| 1955 | applet_name = rmt_ip_str;
|
---|
[1765] | 1956 | if (verbose > 2)
|
---|
| 1957 | bb_error_msg("connected");
|
---|
| 1958 | }
|
---|
[821] | 1959 |
|
---|
[2725] | 1960 | /* Install timeout handler. get_line() needs it. */
|
---|
| 1961 | signal(SIGALRM, send_REQUEST_TIMEOUT_and_exit);
|
---|
[821] | 1962 |
|
---|
[1765] | 1963 | if (!get_line()) /* EOF or error or empty line */
|
---|
| 1964 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
[821] | 1965 |
|
---|
[1765] | 1966 | /* Determine type of request (GET/POST) */
|
---|
| 1967 | urlp = strpbrk(iobuf, " \t");
|
---|
| 1968 | if (urlp == NULL)
|
---|
| 1969 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 1970 | *urlp++ = '\0';
|
---|
| 1971 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 1972 | prequest = request_GET;
|
---|
| 1973 | if (strcasecmp(iobuf, prequest) != 0) {
|
---|
[2725] | 1974 | prequest = request_HEAD;
|
---|
| 1975 | if (strcasecmp(iobuf, prequest) != 0) {
|
---|
| 1976 | prequest = "POST";
|
---|
| 1977 | if (strcasecmp(iobuf, prequest) != 0)
|
---|
| 1978 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
| 1979 | }
|
---|
[821] | 1980 | }
|
---|
| 1981 | #else
|
---|
[1765] | 1982 | if (strcasecmp(iobuf, request_GET) != 0)
|
---|
| 1983 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
[821] | 1984 | #endif
|
---|
[1765] | 1985 | urlp = skip_whitespace(urlp);
|
---|
| 1986 | if (urlp[0] != '/')
|
---|
| 1987 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
[821] | 1988 |
|
---|
[1765] | 1989 | /* Find end of URL and parse HTTP version, if any */
|
---|
[2725] | 1990 | http_major_version = '0';
|
---|
| 1991 | IF_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
|
---|
[1765] | 1992 | tptr = strchrnul(urlp, ' ');
|
---|
| 1993 | /* Is it " HTTP/"? */
|
---|
[2725] | 1994 | if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
|
---|
| 1995 | http_major_version = tptr[6];
|
---|
| 1996 | IF_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
|
---|
| 1997 | }
|
---|
[1765] | 1998 | *tptr = '\0';
|
---|
[821] | 1999 |
|
---|
[1765] | 2000 | /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
|
---|
[2725] | 2001 | urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
|
---|
[1765] | 2002 | /*if (urlcopy == NULL)
|
---|
| 2003 | * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
|
---|
| 2004 | strcpy(urlcopy, urlp);
|
---|
| 2005 | /* NB: urlcopy ptr is never changed after this */
|
---|
[821] | 2006 |
|
---|
[1765] | 2007 | /* Extract url args if present */
|
---|
[3232] | 2008 | /* g_query = NULL; - already is */
|
---|
[1765] | 2009 | tptr = strchr(urlcopy, '?');
|
---|
| 2010 | if (tptr) {
|
---|
| 2011 | *tptr++ = '\0';
|
---|
| 2012 | g_query = tptr;
|
---|
[821] | 2013 | }
|
---|
| 2014 |
|
---|
[1765] | 2015 | /* Decode URL escape sequences */
|
---|
[3232] | 2016 | tptr = percent_decode_in_place(urlcopy, /*strict:*/ 1);
|
---|
[1765] | 2017 | if (tptr == NULL)
|
---|
| 2018 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 2019 | if (tptr == urlcopy + 1) {
|
---|
| 2020 | /* '/' or NUL is encoded */
|
---|
| 2021 | send_headers_and_exit(HTTP_NOT_FOUND);
|
---|
| 2022 | }
|
---|
[821] | 2023 |
|
---|
[1765] | 2024 | /* Canonicalize path */
|
---|
| 2025 | /* Algorithm stolen from libbb bb_simplify_path(),
|
---|
[2725] | 2026 | * but don't strdup, retain trailing slash, protect root */
|
---|
[1765] | 2027 | urlp = tptr = urlcopy;
|
---|
[3232] | 2028 | for (;;) {
|
---|
[1765] | 2029 | if (*urlp == '/') {
|
---|
| 2030 | /* skip duplicate (or initial) slash */
|
---|
| 2031 | if (*tptr == '/') {
|
---|
[3232] | 2032 | goto next_char;
|
---|
[1765] | 2033 | }
|
---|
| 2034 | if (*tptr == '.') {
|
---|
[3232] | 2035 | if (tptr[1] == '.' && (tptr[2] == '/' || tptr[2] == '\0')) {
|
---|
| 2036 | /* "..": be careful */
|
---|
| 2037 | /* protect root */
|
---|
| 2038 | if (urlp == urlcopy)
|
---|
[1765] | 2039 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
[3232] | 2040 | /* omit previous dir */
|
---|
| 2041 | while (*--urlp != '/')
|
---|
[1765] | 2042 | continue;
|
---|
[3232] | 2043 | /* skip to "./" or ".<NUL>" */
|
---|
| 2044 | tptr++;
|
---|
[1765] | 2045 | }
|
---|
[3232] | 2046 | if (tptr[1] == '/' || tptr[1] == '\0') {
|
---|
| 2047 | /* skip extra "/./" */
|
---|
| 2048 | goto next_char;
|
---|
| 2049 | }
|
---|
[1765] | 2050 | }
|
---|
| 2051 | }
|
---|
| 2052 | *++urlp = *tptr;
|
---|
[3232] | 2053 | if (*urlp == '\0')
|
---|
| 2054 | break;
|
---|
| 2055 | next_char:
|
---|
| 2056 | tptr++;
|
---|
| 2057 | }
|
---|
[821] | 2058 |
|
---|
[1765] | 2059 | /* If URL is a directory, add '/' */
|
---|
[2725] | 2060 | if (urlp[-1] != '/') {
|
---|
[3232] | 2061 | if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
|
---|
[1765] | 2062 | found_moved_temporarily = urlcopy;
|
---|
| 2063 | }
|
---|
[821] | 2064 | }
|
---|
| 2065 |
|
---|
[1765] | 2066 | /* Log it */
|
---|
| 2067 | if (verbose > 1)
|
---|
| 2068 | bb_error_msg("url:%s", urlcopy);
|
---|
[821] | 2069 |
|
---|
[1765] | 2070 | tptr = urlcopy;
|
---|
| 2071 | ip_allowed = checkPermIP();
|
---|
| 2072 | while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
|
---|
| 2073 | /* have path1/path2 */
|
---|
| 2074 | *tptr = '\0';
|
---|
[3232] | 2075 | if (is_directory(urlcopy + 1, /*followlinks:*/ 1)) {
|
---|
[2725] | 2076 | /* may have subdir config */
|
---|
[1765] | 2077 | parse_conf(urlcopy + 1, SUBDIR_PARSE);
|
---|
| 2078 | ip_allowed = checkPermIP();
|
---|
| 2079 | }
|
---|
| 2080 | *tptr = '/';
|
---|
[821] | 2081 | }
|
---|
[2725] | 2082 |
|
---|
| 2083 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2084 | proxy_entry = find_proxy_entry(urlcopy);
|
---|
| 2085 | if (proxy_entry)
|
---|
| 2086 | header_buf = header_ptr = xmalloc(IOBUF_SIZE);
|
---|
| 2087 | #endif
|
---|
| 2088 |
|
---|
| 2089 | if (http_major_version >= '0') {
|
---|
[1765] | 2090 | /* Request was with "... HTTP/nXXX", and n >= 0 */
|
---|
[821] | 2091 |
|
---|
[2725] | 2092 | /* Read until blank line */
|
---|
[1765] | 2093 | while (1) {
|
---|
| 2094 | if (!get_line())
|
---|
| 2095 | break; /* EOF or error or empty line */
|
---|
| 2096 | if (DEBUG)
|
---|
| 2097 | bb_error_msg("header: '%s'", iobuf);
|
---|
[821] | 2098 |
|
---|
[2725] | 2099 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2100 | /* We need 2 more bytes for yet another "\r\n" -
|
---|
| 2101 | * see near fdprintf(proxy_fd...) further below */
|
---|
| 2102 | if (proxy_entry && (header_ptr - header_buf) < IOBUF_SIZE - 2) {
|
---|
| 2103 | int len = strlen(iobuf);
|
---|
| 2104 | if (len > IOBUF_SIZE - (header_ptr - header_buf) - 4)
|
---|
| 2105 | len = IOBUF_SIZE - (header_ptr - header_buf) - 4;
|
---|
| 2106 | memcpy(header_ptr, iobuf, len);
|
---|
| 2107 | header_ptr += len;
|
---|
| 2108 | header_ptr[0] = '\r';
|
---|
| 2109 | header_ptr[1] = '\n';
|
---|
| 2110 | header_ptr += 2;
|
---|
| 2111 | }
|
---|
| 2112 | #endif
|
---|
| 2113 |
|
---|
| 2114 | #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2115 | /* Try and do our best to parse more lines */
|
---|
[1765] | 2116 | if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
|
---|
| 2117 | /* extra read only for POST */
|
---|
[2725] | 2118 | if (prequest != request_GET
|
---|
| 2119 | # if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2120 | && prequest != request_HEAD
|
---|
| 2121 | # endif
|
---|
| 2122 | ) {
|
---|
| 2123 | tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
|
---|
[1765] | 2124 | if (!tptr[0])
|
---|
| 2125 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 2126 | /* not using strtoul: it ignores leading minus! */
|
---|
[2725] | 2127 | length = bb_strtou(tptr, NULL, 10);
|
---|
[1765] | 2128 | /* length is "ulong", but we need to pass it to int later */
|
---|
[2725] | 2129 | if (errno || length > INT_MAX)
|
---|
[1765] | 2130 | send_headers_and_exit(HTTP_BAD_REQUEST);
|
---|
| 2131 | }
|
---|
[2725] | 2132 | }
|
---|
| 2133 | #endif
|
---|
| 2134 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2135 | else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
|
---|
| 2136 | cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
|
---|
[1765] | 2137 | } else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
|
---|
[2725] | 2138 | content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
|
---|
[1765] | 2139 | } else if (STRNCASECMP(iobuf, "Referer:") == 0) {
|
---|
[2725] | 2140 | referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
|
---|
[1765] | 2141 | } else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
|
---|
[2725] | 2142 | user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
|
---|
| 2143 | } else if (STRNCASECMP(iobuf, "Host:") == 0) {
|
---|
| 2144 | host = xstrdup(skip_whitespace(iobuf + sizeof("Host:")-1));
|
---|
| 2145 | } else if (STRNCASECMP(iobuf, "Accept:") == 0) {
|
---|
| 2146 | http_accept = xstrdup(skip_whitespace(iobuf + sizeof("Accept:")-1));
|
---|
| 2147 | } else if (STRNCASECMP(iobuf, "Accept-Language:") == 0) {
|
---|
| 2148 | http_accept_language = xstrdup(skip_whitespace(iobuf + sizeof("Accept-Language:")-1));
|
---|
[1765] | 2149 | }
|
---|
| 2150 | #endif
|
---|
| 2151 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
| 2152 | if (STRNCASECMP(iobuf, "Authorization:") == 0) {
|
---|
| 2153 | /* We only allow Basic credentials.
|
---|
[2725] | 2154 | * It shows up as "Authorization: Basic <user>:<passwd>" where
|
---|
| 2155 | * "<user>:<passwd>" is base64 encoded.
|
---|
[1765] | 2156 | */
|
---|
| 2157 | tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
|
---|
| 2158 | if (STRNCASECMP(tptr, "Basic") != 0)
|
---|
| 2159 | continue;
|
---|
| 2160 | tptr += sizeof("Basic")-1;
|
---|
| 2161 | /* decodeBase64() skips whitespace itself */
|
---|
| 2162 | decodeBase64(tptr);
|
---|
[2725] | 2163 | authorized = check_user_passwd(urlcopy, tptr);
|
---|
[1765] | 2164 | }
|
---|
[2725] | 2165 | #endif
|
---|
| 2166 | #if ENABLE_FEATURE_HTTPD_RANGES
|
---|
| 2167 | if (STRNCASECMP(iobuf, "Range:") == 0) {
|
---|
| 2168 | /* We know only bytes=NNN-[MMM] */
|
---|
| 2169 | char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
|
---|
| 2170 | if (strncmp(s, "bytes=", 6) == 0) {
|
---|
| 2171 | s += sizeof("bytes=")-1;
|
---|
| 2172 | range_start = BB_STRTOOFF(s, &s, 10);
|
---|
| 2173 | if (s[0] != '-' || range_start < 0) {
|
---|
[3232] | 2174 | range_start = -1;
|
---|
[2725] | 2175 | } else if (s[1]) {
|
---|
| 2176 | range_end = BB_STRTOOFF(s+1, NULL, 10);
|
---|
| 2177 | if (errno || range_end < range_start)
|
---|
[3232] | 2178 | range_start = -1;
|
---|
[2725] | 2179 | }
|
---|
| 2180 | }
|
---|
| 2181 | }
|
---|
| 2182 | #endif
|
---|
| 2183 | #if ENABLE_FEATURE_HTTPD_GZIP
|
---|
| 2184 | if (STRNCASECMP(iobuf, "Accept-Encoding:") == 0) {
|
---|
| 2185 | /* Note: we do not support "gzip;q=0"
|
---|
| 2186 | * method of _disabling_ gzip
|
---|
| 2187 | * delivery. No one uses that, though */
|
---|
| 2188 | const char *s = strstr(iobuf, "gzip");
|
---|
| 2189 | if (s) {
|
---|
| 2190 | // want more thorough checks?
|
---|
| 2191 | //if (s[-1] == ' '
|
---|
| 2192 | // || s[-1] == ','
|
---|
| 2193 | // || s[-1] == ':'
|
---|
| 2194 | //) {
|
---|
| 2195 | content_gzip = 1;
|
---|
| 2196 | //}
|
---|
| 2197 | }
|
---|
| 2198 | }
|
---|
| 2199 | #endif
|
---|
[1765] | 2200 | } /* while extra header reading */
|
---|
[821] | 2201 | }
|
---|
| 2202 |
|
---|
[2725] | 2203 | /* We are done reading headers, disable peer timeout */
|
---|
[1765] | 2204 | alarm(0);
|
---|
[821] | 2205 |
|
---|
[2725] | 2206 | if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
|
---|
| 2207 | /* protect listing [/path]/httpd.conf or IP deny */
|
---|
[1765] | 2208 | send_headers_and_exit(HTTP_FORBIDDEN);
|
---|
| 2209 | }
|
---|
[821] | 2210 |
|
---|
[1765] | 2211 | #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
|
---|
[3232] | 2212 | /* Case: no "Authorization:" was seen, but page might require passwd.
|
---|
[2725] | 2213 | * Check that with dummy user:pass */
|
---|
| 2214 | if (authorized < 0)
|
---|
[3232] | 2215 | authorized = check_user_passwd(urlcopy, (char *) "");
|
---|
[2725] | 2216 | if (!authorized)
|
---|
[1765] | 2217 | send_headers_and_exit(HTTP_UNAUTHORIZED);
|
---|
[821] | 2218 | #endif
|
---|
| 2219 |
|
---|
[1765] | 2220 | if (found_moved_temporarily) {
|
---|
| 2221 | send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
|
---|
| 2222 | }
|
---|
[821] | 2223 |
|
---|
[2725] | 2224 | #if ENABLE_FEATURE_HTTPD_PROXY
|
---|
| 2225 | if (proxy_entry != NULL) {
|
---|
| 2226 | int proxy_fd;
|
---|
| 2227 | len_and_sockaddr *lsa;
|
---|
| 2228 |
|
---|
| 2229 | proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
|
---|
| 2230 | if (proxy_fd < 0)
|
---|
| 2231 | send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
|
---|
| 2232 | lsa = host2sockaddr(proxy_entry->host_port, 80);
|
---|
| 2233 | if (lsa == NULL)
|
---|
| 2234 | send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
|
---|
| 2235 | if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
|
---|
| 2236 | send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
|
---|
| 2237 | fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
|
---|
| 2238 | prequest, /* GET or POST */
|
---|
| 2239 | proxy_entry->url_to, /* url part 1 */
|
---|
| 2240 | urlcopy + strlen(proxy_entry->url_from), /* url part 2 */
|
---|
| 2241 | (g_query ? "?" : ""), /* "?" (maybe) */
|
---|
| 2242 | (g_query ? g_query : ""), /* query string (maybe) */
|
---|
| 2243 | http_major_version, http_minor_version);
|
---|
| 2244 | header_ptr[0] = '\r';
|
---|
| 2245 | header_ptr[1] = '\n';
|
---|
| 2246 | header_ptr += 2;
|
---|
| 2247 | write(proxy_fd, header_buf, header_ptr - header_buf);
|
---|
| 2248 | free(header_buf); /* on the order of 8k, free it */
|
---|
| 2249 | cgi_io_loop_and_exit(proxy_fd, proxy_fd, length);
|
---|
| 2250 | }
|
---|
| 2251 | #endif
|
---|
| 2252 |
|
---|
[1765] | 2253 | tptr = urlcopy + 1; /* skip first '/' */
|
---|
[821] | 2254 |
|
---|
[1765] | 2255 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2256 | if (strncmp(tptr, "cgi-bin/", 8) == 0) {
|
---|
| 2257 | if (tptr[8] == '\0') {
|
---|
| 2258 | /* protect listing "cgi-bin/" */
|
---|
| 2259 | send_headers_and_exit(HTTP_FORBIDDEN);
|
---|
[821] | 2260 | }
|
---|
[3232] | 2261 | send_cgi_and_exit(urlcopy, urlcopy, prequest, length, cookie, content_type);
|
---|
[1765] | 2262 | }
|
---|
[2725] | 2263 | #endif
|
---|
| 2264 |
|
---|
[3232] | 2265 | if (urlp[-1] == '/') {
|
---|
| 2266 | /* When index_page string is appended to <dir>/ URL, it overwrites
|
---|
| 2267 | * the query string. If we fall back to call /cgi-bin/index.cgi,
|
---|
| 2268 | * query string would be lost and not available to the CGI.
|
---|
| 2269 | * Work around it by making a deep copy.
|
---|
| 2270 | */
|
---|
| 2271 | if (ENABLE_FEATURE_HTTPD_CGI)
|
---|
| 2272 | g_query = xstrdup(g_query); /* ok for NULL too */
|
---|
[2725] | 2273 | strcpy(urlp, index_page);
|
---|
[3232] | 2274 | }
|
---|
[2725] | 2275 | if (stat(tptr, &sb) == 0) {
|
---|
[1765] | 2276 | #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
|
---|
| 2277 | char *suffix = strrchr(tptr, '.');
|
---|
| 2278 | if (suffix) {
|
---|
| 2279 | Htaccess *cur;
|
---|
| 2280 | for (cur = script_i; cur; cur = cur->next) {
|
---|
| 2281 | if (strcmp(cur->before_colon + 1, suffix) == 0) {
|
---|
[3232] | 2282 | send_cgi_and_exit(urlcopy, urlcopy, prequest, length, cookie, content_type);
|
---|
[1765] | 2283 | }
|
---|
| 2284 | }
|
---|
| 2285 | }
|
---|
[821] | 2286 | #endif
|
---|
[2725] | 2287 | file_size = sb.st_size;
|
---|
[1765] | 2288 | last_mod = sb.st_mtime;
|
---|
[821] | 2289 | }
|
---|
[1765] | 2290 | #if ENABLE_FEATURE_HTTPD_CGI
|
---|
| 2291 | else if (urlp[-1] == '/') {
|
---|
| 2292 | /* It's a dir URL and there is no index.html
|
---|
| 2293 | * Try cgi-bin/index.cgi */
|
---|
| 2294 | if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
|
---|
[3232] | 2295 | urlp[0] = '\0'; /* remove index_page */
|
---|
| 2296 | send_cgi_and_exit("/cgi-bin/index.cgi", urlcopy, prequest, length, cookie, content_type);
|
---|
[1765] | 2297 | }
|
---|
| 2298 | }
|
---|
[2725] | 2299 | /* else fall through to send_file, it errors out if open fails: */
|
---|
| 2300 |
|
---|
| 2301 | if (prequest != request_GET && prequest != request_HEAD) {
|
---|
| 2302 | /* POST for files does not make sense */
|
---|
| 2303 | send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
|
---|
| 2304 | }
|
---|
| 2305 | send_file_and_exit(tptr,
|
---|
| 2306 | (prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
|
---|
| 2307 | );
|
---|
| 2308 | #else
|
---|
| 2309 | send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
|
---|
[821] | 2310 | #endif
|
---|
[1765] | 2311 | }
|
---|
[821] | 2312 |
|
---|
[1765] | 2313 | /*
|
---|
| 2314 | * The main http server function.
|
---|
| 2315 | * Given a socket, listen for new connections and farm out
|
---|
| 2316 | * the processing as a [v]forked process.
|
---|
| 2317 | * Never returns.
|
---|
| 2318 | */
|
---|
| 2319 | #if BB_MMU
|
---|
[2725] | 2320 | static void mini_httpd(int server_socket) NORETURN;
|
---|
[1765] | 2321 | static void mini_httpd(int server_socket)
|
---|
| 2322 | {
|
---|
| 2323 | /* NB: it's best to not use xfuncs in this loop before fork().
|
---|
| 2324 | * Otherwise server may die on transient errors (temporary
|
---|
| 2325 | * out-of-memory condition, etc), which is Bad(tm).
|
---|
| 2326 | * Try to do any dangerous calls after fork.
|
---|
| 2327 | */
|
---|
| 2328 | while (1) {
|
---|
| 2329 | int n;
|
---|
| 2330 | len_and_sockaddr fromAddr;
|
---|
[2725] | 2331 |
|
---|
[1765] | 2332 | /* Wait for connections... */
|
---|
| 2333 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
[2725] | 2334 | n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
|
---|
[1765] | 2335 | if (n < 0)
|
---|
| 2336 | continue;
|
---|
[2725] | 2337 |
|
---|
[1765] | 2338 | /* set the KEEPALIVE option to cull dead connections */
|
---|
| 2339 | setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
---|
| 2340 |
|
---|
| 2341 | if (fork() == 0) {
|
---|
| 2342 | /* child */
|
---|
| 2343 | /* Do not reload config on HUP */
|
---|
| 2344 | signal(SIGHUP, SIG_IGN);
|
---|
| 2345 | close(server_socket);
|
---|
| 2346 | xmove_fd(n, 0);
|
---|
| 2347 | xdup2(0, 1);
|
---|
[821] | 2348 |
|
---|
[1765] | 2349 | handle_incoming_and_exit(&fromAddr);
|
---|
| 2350 | }
|
---|
| 2351 | /* parent, or fork failed */
|
---|
| 2352 | close(n);
|
---|
| 2353 | } /* while (1) */
|
---|
| 2354 | /* never reached */
|
---|
[821] | 2355 | }
|
---|
[1765] | 2356 | #else
|
---|
[2725] | 2357 | static void mini_httpd_nommu(int server_socket, int argc, char **argv) NORETURN;
|
---|
[1765] | 2358 | static void mini_httpd_nommu(int server_socket, int argc, char **argv)
|
---|
[821] | 2359 | {
|
---|
[1765] | 2360 | char *argv_copy[argc + 2];
|
---|
[821] | 2361 |
|
---|
[1765] | 2362 | argv_copy[0] = argv[0];
|
---|
| 2363 | argv_copy[1] = (char*)"-i";
|
---|
| 2364 | memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
|
---|
[821] | 2365 |
|
---|
[1765] | 2366 | /* NB: it's best to not use xfuncs in this loop before vfork().
|
---|
| 2367 | * Otherwise server may die on transient errors (temporary
|
---|
| 2368 | * out-of-memory condition, etc), which is Bad(tm).
|
---|
| 2369 | * Try to do any dangerous calls after fork.
|
---|
| 2370 | */
|
---|
| 2371 | while (1) {
|
---|
| 2372 | int n;
|
---|
| 2373 | len_and_sockaddr fromAddr;
|
---|
[2725] | 2374 |
|
---|
[1765] | 2375 | /* Wait for connections... */
|
---|
| 2376 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
[2725] | 2377 | n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
|
---|
[1765] | 2378 | if (n < 0)
|
---|
| 2379 | continue;
|
---|
[2725] | 2380 |
|
---|
[1765] | 2381 | /* set the KEEPALIVE option to cull dead connections */
|
---|
| 2382 | setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
|
---|
[821] | 2383 |
|
---|
[1765] | 2384 | if (vfork() == 0) {
|
---|
| 2385 | /* child */
|
---|
| 2386 | /* Do not reload config on HUP */
|
---|
| 2387 | signal(SIGHUP, SIG_IGN);
|
---|
| 2388 | close(server_socket);
|
---|
| 2389 | xmove_fd(n, 0);
|
---|
| 2390 | xdup2(0, 1);
|
---|
[821] | 2391 |
|
---|
[1765] | 2392 | /* Run a copy of ourself in inetd mode */
|
---|
| 2393 | re_exec(argv_copy);
|
---|
| 2394 | }
|
---|
[3232] | 2395 | argv_copy[0][0] &= 0x7f;
|
---|
[1765] | 2396 | /* parent, or vfork failed */
|
---|
| 2397 | close(n);
|
---|
| 2398 | } /* while (1) */
|
---|
| 2399 | /* never reached */
|
---|
| 2400 | }
|
---|
[821] | 2401 | #endif
|
---|
| 2402 |
|
---|
[1765] | 2403 | /*
|
---|
| 2404 | * Process a HTTP connection on stdin/out.
|
---|
| 2405 | * Never returns.
|
---|
| 2406 | */
|
---|
[2725] | 2407 | static void mini_httpd_inetd(void) NORETURN;
|
---|
[1765] | 2408 | static void mini_httpd_inetd(void)
|
---|
[821] | 2409 | {
|
---|
[1765] | 2410 | len_and_sockaddr fromAddr;
|
---|
[821] | 2411 |
|
---|
[2725] | 2412 | memset(&fromAddr, 0, sizeof(fromAddr));
|
---|
[1765] | 2413 | fromAddr.len = LSA_SIZEOF_SA;
|
---|
[2725] | 2414 | /* NB: can fail if user runs it by hand and types in http cmds */
|
---|
| 2415 | getpeername(0, &fromAddr.u.sa, &fromAddr.len);
|
---|
[1765] | 2416 | handle_incoming_and_exit(&fromAddr);
|
---|
[821] | 2417 | }
|
---|
| 2418 |
|
---|
[2725] | 2419 | static void sighup_handler(int sig UNUSED_PARAM)
|
---|
[821] | 2420 | {
|
---|
[2725] | 2421 | parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
|
---|
[821] | 2422 | }
|
---|
| 2423 |
|
---|
[1765] | 2424 | enum {
|
---|
[821] | 2425 | c_opt_config_file = 0,
|
---|
| 2426 | d_opt_decode_url,
|
---|
| 2427 | h_opt_home_httpd,
|
---|
[2725] | 2428 | IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
|
---|
| 2429 | IF_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
|
---|
| 2430 | IF_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
|
---|
| 2431 | IF_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
|
---|
[1765] | 2432 | p_opt_port ,
|
---|
| 2433 | p_opt_inetd ,
|
---|
| 2434 | p_opt_foreground,
|
---|
| 2435 | p_opt_verbose ,
|
---|
| 2436 | OPT_CONFIG_FILE = 1 << c_opt_config_file,
|
---|
| 2437 | OPT_DECODE_URL = 1 << d_opt_decode_url,
|
---|
| 2438 | OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
|
---|
[2725] | 2439 | OPT_ENCODE_URL = IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
|
---|
| 2440 | OPT_REALM = IF_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
|
---|
| 2441 | OPT_MD5 = IF_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
|
---|
| 2442 | OPT_SETUID = IF_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
|
---|
[1765] | 2443 | OPT_PORT = 1 << p_opt_port,
|
---|
| 2444 | OPT_INETD = 1 << p_opt_inetd,
|
---|
| 2445 | OPT_FOREGROUND = 1 << p_opt_foreground,
|
---|
| 2446 | OPT_VERBOSE = 1 << p_opt_verbose,
|
---|
[821] | 2447 | };
|
---|
| 2448 |
|
---|
| 2449 |
|
---|
[2725] | 2450 | int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 2451 | int httpd_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 2452 | {
|
---|
[1765] | 2453 | int server_socket = server_socket; /* for gcc */
|
---|
| 2454 | unsigned opt;
|
---|
| 2455 | char *url_for_decode;
|
---|
[2725] | 2456 | IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
|
---|
| 2457 | IF_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
|
---|
| 2458 | IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
|
---|
| 2459 | IF_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
|
---|
[821] | 2460 |
|
---|
[1765] | 2461 | INIT_G();
|
---|
[821] | 2462 |
|
---|
[1765] | 2463 | #if ENABLE_LOCALE_SUPPORT
|
---|
| 2464 | /* Undo busybox.c: we want to speak English in http (dates etc) */
|
---|
| 2465 | setlocale(LC_TIME, "C");
|
---|
[821] | 2466 | #endif
|
---|
| 2467 |
|
---|
[1765] | 2468 | home_httpd = xrealloc_getcwd_or_warn(NULL);
|
---|
| 2469 | /* -v counts, -i implies -f */
|
---|
| 2470 | opt_complementary = "vv:if";
|
---|
| 2471 | /* We do not "absolutize" path given by -h (home) opt.
|
---|
[2725] | 2472 | * If user gives relative path in -h,
|
---|
| 2473 | * $SCRIPT_FILENAME will not be set. */
|
---|
[1765] | 2474 | opt = getopt32(argv, "c:d:h:"
|
---|
[2725] | 2475 | IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
|
---|
| 2476 | IF_FEATURE_HTTPD_BASIC_AUTH("r:")
|
---|
| 2477 | IF_FEATURE_HTTPD_AUTH_MD5("m:")
|
---|
| 2478 | IF_FEATURE_HTTPD_SETUID("u:")
|
---|
[1765] | 2479 | "p:ifv",
|
---|
[2725] | 2480 | &opt_c_configFile, &url_for_decode, &home_httpd
|
---|
| 2481 | IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
|
---|
| 2482 | IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
|
---|
| 2483 | IF_FEATURE_HTTPD_AUTH_MD5(, &pass)
|
---|
| 2484 | IF_FEATURE_HTTPD_SETUID(, &s_ugid)
|
---|
[1765] | 2485 | , &bind_addr_or_port
|
---|
| 2486 | , &verbose
|
---|
| 2487 | );
|
---|
| 2488 | if (opt & OPT_DECODE_URL) {
|
---|
[3232] | 2489 | fputs(percent_decode_in_place(url_for_decode, /*strict:*/ 0), stdout);
|
---|
[1765] | 2490 | return 0;
|
---|
| 2491 | }
|
---|
| 2492 | #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
|
---|
| 2493 | if (opt & OPT_ENCODE_URL) {
|
---|
| 2494 | fputs(encodeString(url_for_encode), stdout);
|
---|
| 2495 | return 0;
|
---|
| 2496 | }
|
---|
[821] | 2497 | #endif
|
---|
[1765] | 2498 | #if ENABLE_FEATURE_HTTPD_AUTH_MD5
|
---|
| 2499 | if (opt & OPT_MD5) {
|
---|
[2725] | 2500 | char salt[sizeof("$1$XXXXXXXX")];
|
---|
| 2501 | salt[0] = '$';
|
---|
| 2502 | salt[1] = '1';
|
---|
| 2503 | salt[2] = '$';
|
---|
[3232] | 2504 | crypt_make_salt(salt + 3, 4);
|
---|
| 2505 | puts(pw_encrypt(pass, salt, /*cleanup:*/ 0));
|
---|
[1765] | 2506 | return 0;
|
---|
| 2507 | }
|
---|
[821] | 2508 | #endif
|
---|
[1765] | 2509 | #if ENABLE_FEATURE_HTTPD_SETUID
|
---|
| 2510 | if (opt & OPT_SETUID) {
|
---|
[2725] | 2511 | xget_uidgid(&ugid, s_ugid);
|
---|
[1765] | 2512 | }
|
---|
| 2513 | #endif
|
---|
[821] | 2514 |
|
---|
[1765] | 2515 | #if !BB_MMU
|
---|
| 2516 | if (!(opt & OPT_FOREGROUND)) {
|
---|
| 2517 | bb_daemonize_or_rexec(0, argv); /* don't change current directory */
|
---|
[821] | 2518 | }
|
---|
| 2519 | #endif
|
---|
| 2520 |
|
---|
[1765] | 2521 | xchdir(home_httpd);
|
---|
| 2522 | if (!(opt & OPT_INETD)) {
|
---|
| 2523 | signal(SIGCHLD, SIG_IGN);
|
---|
| 2524 | server_socket = openServer();
|
---|
| 2525 | #if ENABLE_FEATURE_HTTPD_SETUID
|
---|
| 2526 | /* drop privileges */
|
---|
| 2527 | if (opt & OPT_SETUID) {
|
---|
| 2528 | if (ugid.gid != (gid_t)-1) {
|
---|
| 2529 | if (setgroups(1, &ugid.gid) == -1)
|
---|
| 2530 | bb_perror_msg_and_die("setgroups");
|
---|
| 2531 | xsetgid(ugid.gid);
|
---|
| 2532 | }
|
---|
| 2533 | xsetuid(ugid.uid);
|
---|
| 2534 | }
|
---|
[821] | 2535 | #endif
|
---|
[1765] | 2536 | }
|
---|
[821] | 2537 |
|
---|
[2725] | 2538 | #if 0
|
---|
| 2539 | /* User can do it himself: 'env - PATH="$PATH" httpd'
|
---|
| 2540 | * We don't do it because we don't want to screw users
|
---|
| 2541 | * which want to do
|
---|
| 2542 | * 'env - VAR1=val1 VAR2=val2 httpd'
|
---|
| 2543 | * and have VAR1 and VAR2 values visible in their CGIs.
|
---|
| 2544 | * Besides, it is also smaller. */
|
---|
[1765] | 2545 | {
|
---|
| 2546 | char *p = getenv("PATH");
|
---|
[2725] | 2547 | /* env strings themself are not freed, no need to xstrdup(p): */
|
---|
[1765] | 2548 | clearenv();
|
---|
| 2549 | if (p)
|
---|
| 2550 | putenv(p - 5);
|
---|
| 2551 | // if (!(opt & OPT_INETD))
|
---|
| 2552 | // setenv_long("SERVER_PORT", ???);
|
---|
[821] | 2553 | }
|
---|
| 2554 | #endif
|
---|
| 2555 |
|
---|
[2725] | 2556 | parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
|
---|
[1765] | 2557 | if (!(opt & OPT_INETD))
|
---|
[2725] | 2558 | signal(SIGHUP, sighup_handler);
|
---|
[821] | 2559 |
|
---|
[1765] | 2560 | xfunc_error_retval = 0;
|
---|
| 2561 | if (opt & OPT_INETD)
|
---|
| 2562 | mini_httpd_inetd();
|
---|
| 2563 | #if BB_MMU
|
---|
| 2564 | if (!(opt & OPT_FOREGROUND))
|
---|
| 2565 | bb_daemonize(0); /* don't change current directory */
|
---|
| 2566 | mini_httpd(server_socket); /* never returns */
|
---|
[821] | 2567 | #else
|
---|
[1765] | 2568 | mini_httpd_nommu(server_socket, argc, argv); /* never returns */
|
---|
[821] | 2569 | #endif
|
---|
[1765] | 2570 | /* return 0; */
|
---|
[821] | 2571 | }
|
---|