如何限制访问者的ip(PHPBB的代码)

如何限制访问者的ip(PHPBB的代码) Code:   <?php
/***************************************************************************
*admin_user_ban.php
*-------------------
*begin:Tuesday,Jul31,2001
*copyright:(C)2001ThephpBBGroup
*email:[email]support@phpbb.com[/email]
*
*$Id:admin_user_ban.php,v1.21.2.22002/05/1215:57:45psotfxExp$
*
*
***************************************************************************/

/***************************************************************************
*ThisfileispartofthephpBB2porttoNuke6.0(c)copyright2002
*byTomNitzschner([email]tom@toms-home.com[/email])
*[url]http://bbtonuke.sourceforge.net[/url](or[url]http://www.toms-home.com)[/url]
*
*Asalways,makeabackupbeforemessingwithanything.Allcode
*releasebymeisconsideredsamplecodeonly.Itmaybefully
*functual,butyouuseitatyourownrisk,ifyoubreakit,
*yougettofixittoo.Nowarantyisgivenorimplied.
*
*Pleasepostallquestions/requestaboutthisporton[url]http://bbtonuke.sourceforge.net[/url]first,
*thenonmysite.Alloriginalheadercodeandcopyrightmessageswillbemaintained
*togivecreditwherecreditisdue.Ifyoumodifythis,theonlyrequirementis
*thatyoualsomaintainalloriginalcopyrightmessages.Allmyworkisreleased
*undertheGNUGENERALPUBLICLICENSE.PleaseseetheREADMEformoreinformation.
*
***************************************************************************/

/***************************************************************************
*
*Thisprogramisfreesoftware;youcanredistributeitand/ormodify
*itunderthetermsoftheGNUGeneralPublicLicenseaspublishedby
*theFreeSoftwareFoundation;eitherversion2oftheLicense,or
*(atyouroption)anylaterversion.
*
***************************************************************************/

define("IN_PHPBB",1);

if(!empty($setmodules))
{
$filename=basename(__FILE__);
$module["Users"]["Ban_Management"]=$filename;

return;
}

//
//Loaddefaultheader
//
$phpbb_root_path="./../";
require($phpbb_root_path."extension.inc");
require("./pagestart.".$phpEx);

//
//Startprogram
//
if(isset($HTTP_POST_VARS["submit"]))
{
$user_bansql="";
$email_bansql="";
$ip_bansql="";

$user_list=array();
if(!empty($HTTP_POST_VARS["username"]))
{
$this_userdata=get_userdata($HTTP_POST_VARS["username"]);
if(!$this_userdata)
{
message_die(GENERAL_MESSAGE,$lang["No_user_id_specified"]);
}

$user_list[]=$this_userdata["user_id"];
}

$ip_list=array();
if(isset($HTTP_POST_VARS["ban_ip"]))
{
$ip_list_temp=explode(",",$HTTP_POST_VARS["ban_ip"]);

for($i=0;$i<count($ip_list_temp);$i++)
{
if(preg_match("/^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})[]*\-[]*([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/",trim($ip_list_temp[$i]),$ip_range_explode))
{
//
//Don"taskaboutallthis,justdon"task...!为什么
//
$ip_1_counter=$ip_range_explode[1];
$ip_1_end=$ip_range_explode[5];

while($ip_1_counter<=$ip_1_end)
{
$ip_2_counter=($ip_1_counter==$ip_range_explode[1])?$ip_range_explode[2]:0;
$ip_2_end=($ip_1_counter<$ip_1_end)?254:$ip_range_explode[6];

if($ip_2_counter==0&&$ip_2_end==254)
{
$ip_2_counter=255;
$ip_2_fragment=255;

$ip_list[]=encode_ip("$ip_1_counter.255.255.255");
}

while($ip_2_counter<=$ip_2_end)
{
$ip_3_counter=($ip_2_counter==$ip_range_explode[2]&&$ip_1_counter==$ip_range_explode[1])?$ip_range_explode[3]:0;
$ip_3_end=($ip_2_counter<$ip_2_end
$ip_1_counter<$ip_1_end)?254:$ip_range_explode[7];

if($ip_3_counter==0&&$ip_3_end==254)
{
$ip_3_counter=255;
$ip_3_fragment=255;

$ip_list[]=encode_ip("$ip_1_counter.$ip_2_counter.255.255");
}

while($ip_3_counter<=$ip_3_end)
{
$ip_4_counter=($ip_3_counter==$ip_range_explode[3]&&$ip_2_counter==$ip_range_explode[2]&&$ip_1_counter==$ip_range_explode[1])?$ip_range_explode[4]:0;
$ip_4_end=($ip_3_counter<$ip_3_end
$ip_2_counter<$ip_2_end)?254:$ip_range_explode[8];

if($ip_4_counter==0&&$ip_4_end==254)
{
$ip_4_counter=255;
$ip_4_fragment=255;

$ip_list[]=encode_ip("$ip_1_counter.$ip_2_counter.$ip_3_counter.255");
}

while($ip_4_counter<=$ip_4_end)
{
$ip_list[]=encode_ip("$ip_1_counter.$ip_2_counter.$ip_3_counter.$ip_4_counter");
$ip_4_counter++;
}
$ip_3_counter++;
}
$ip_2_counter++;
}
$ip_1_counter++;
}
}
elseif(preg_match("/^([\w\-_]\.?){2,}$/is",trim($ip_list_temp[$i])))
{
$ip=gethostbynamel(trim($ip_list_temp[$i]));

for($j=0;$j<count($ip);$j++)
{
if(!empty($ip[$j]))
{
$ip_list[]=encode_ip($ip[$j]);
}
}
}
elseif(preg_match("/^([0-9]{1,3})\.([0-9\*]{1,3})\.([0-9\*]{1,3})\.([0-9\*]{1,3})$/",trim($ip_list_temp[$i])))
{
$ip_list[]=encode_ip(str_replace("*","255",trim($ip_list_temp[$i])));
}
}
}

$email_list=array();
if(isset($HTTP_POST_VARS["ban_email"]))
{
$email_list_temp=explode(",",$HTTP_POST_VARS["ban_email"]);

for($i=0;$i<count($email_list_temp);$i++)
{
//
//Thiseregmatchisbasedononeby[email]php@unreelpro.com[/email]
//containedintheannotatedphpmanualatphp.com(ereg
//section)
//
if(eregi("^(([[:alnum:]\*]+([-_.][[:alnum:]\*]+)*\.?)|(\*))@([[:alnum:]]+([-_]?[[:alnum:]]+)*\.){1,3}([[:alnum:]]{2,6})$",trim($email_list_temp[$i])))
{
$email_list[]=trim($email_list_temp[$i]);
}
}
}

$sql="SELECT*
FROM".BANLIST_TABLE;
if(!($result=$db->sql_query($sql)))
{
message_die(GENERAL_ERROR,"Couldn"tobtainbanlistinformation","",__LINE__,__FILE__,$sql);
}

$current_banlist=$db->sql_fetchrowset($result);
$db->sql_freeresult($result);

$kill_session_sql="";
for($i=0;$i<count($user_list);$i++)
{
$in_banlist=false;
for($j=0;$j<count($current_banlist);$j++)
{
if($user_list[$i]==$current_banlist[$j]["ban_userid"])
{
$in_banlist=true;
}
}

if(!$in_banlist)
{
$kill_session_sql.=(($kill_session_sql!="")?"OR":"")."session_user_id=".$user_list[$i];

$sql="INSERTINTO".BANLIST_TABLE."(ban_userid)
VALUES(".$user_list[$i].")";
if(!$db->sql_query($sql))
{
message_die(GENERAL_ERROR,"Couldn"tinsertban_useridinfointodatabase","",__LINE__,__FILE__,$sql);
}
}
}

for($i=0;$i<count($ip_list);$i++)
{
$in_banlist=false;
for($j=0;$j<count($current_banlist);$j++)
{
if($ip_list[$i]==$current_banlist[$j]["ban_ip"])
{
$in_banlist=true;
}
}

if(!$in_banlist)
{
if(preg_match("/(ff\.)|(\.ff)/is",chunk_split($ip_list[$i],2,".")))
{
$kill_ip_sql="session_ipLIKE"".str_replace(".","",preg_replace("/(ff\.)|(\.ff)/is","%",chunk_split($ip_list[$i],2,"."))).""";
}
else
{
$kill_ip_sql="session_ip="".$ip_list[$i].""";
}

$kill_session_sql.=(($kill_session_sql!="")?"OR":"").$kill_ip_sql;

$sql="INSERTINTO".BANLIST_TABLE."(ban_ip)
VALUES("".$ip_list[$i]."")";
if(!$db->sql_query($sql))
{
message_die(GENERAL_ERROR,"Couldn"tinsertban_ipinfointodatabase","",__LINE__,__FILE__,$sql);
}
}
}

//
//Nowwe"lldeleteallentriesfromthesessiontablewithanyofthebanned
//userorIPinfojustenteredintothebantable...thiswillforceasession
//initialisationresultinginaninstantban
//
if($kill_session_sql!="")
{
$sql="DELETEFROM".SESSIONS_TABLE."
WHERE$kill_session_sql";
if(!$db->sql_query($sql))
{
message_die(GENERAL_ERROR,"Couldn"tdeletebannedsessionsfromdatabase","",__LINE__,__FILE__,$sql);
}
}

for($i=0;$i<count($email_list);$i++)
{
$in_banlist=false;
for($j=0;$j<count($current_banlist);$j++)
{
if($email_list[$i]==$current_banlist[$j]["ban_email"])
{
$in_banlist=true;
}
}

if(!$in_banlist)
{
$sql="INSERTINTO".BANLIST_TABLE."(ban_email)
VALUES("".str_replace(""","""",$email_list[$i])."")";
if(!$db->sql_query($sql))
{
message_die(GENERAL_ERROR,"Couldn"tinsertban_emailinfointodatabase","",__LINE__,__FILE__,$sql);
}
}
}

$where_sql="";

if(isset($HTTP_POST_VARS["unban_user"]))
{
$user_list=$HTTP_POST_VARS["unban_user"];

for($i=0;$i<count($user_list);$i++)
{
if($user_list[$i]!=-1)
{
$where_sql.=(($where_sql!="")?",":"").$user_list[$i];
}
}
}

if(isset($HTTP_POST_VARS["unban_ip"]))
{
$ip_list=$HTTP_POST_VARS["unban_ip"];

for($i=0;$i<count($ip_list);$i++)
{
if($ip_list[$i]!=-1)
{
$where_sql.=(($where_sql!="")?",":"").$ip_list[$i];
}
}
}

if(isset($HTTP_POST_VARS["unban_email"]))
{
$email_list=$HTTP_POST_VARS["unban_email"];

for($i=0;$i<count($email_list);$i++)
{
if($email_list[$i]!=-1)
{
$where_sql.=(($where_sql!="")?",":"").$email_list[$i];
}
}
}

if($where_sql!="")
{
$sql="DELETEFROM".BANLIST_TABLE."
WHEREban_idIN($where_sql)";
if(!$db->sql_query($sql))
{
message_die(GENERAL_ERROR,"Couldn"tdeletebaninfofromdatabase","",__LINE__,__FILE__,$sql);
}
}

$message=$lang["Ban_update_sucessful"]."<br/><br/>".sprintf($lang["Click_return_banadmin"],"<ahref="".append_sid("admin_user_ban.$phpEx")."">","</a>")."<br/><br/>".sprintf($lang["Click_return_admin_index"],"<ahref="".append_sid("index.$phpEx?pane=right")."">","</a>");

message_die(GENERAL_MESSAGE,$message);

}
else
{
$template->set_filenames(array(
"body"=>"admin/user_ban_body.tpl")
);

$template->assign_vars(array(
"L_BAN_TITLE"=>$lang["Ban_control"],
"L_BAN_EXPLAIN"=>$lang["Ban_explain"],
"L_BAN_EXPLAIN_WARN"=>$lang["Ban_explain_warn"],
"L_IP_OR_HOSTNAME"=>$lang["IP_hostname"],
"L_EMAIL_ADDRESS"=>$lang["Email_address"],
"L_SUBMIT"=>$lang["Submit"],
"L_RESET"=>$lang["Reset"],

"S_BANLIST_ACTION"=>append_sid("admin_user_ban.$phpEx"))
);

$template->assign_vars(array(
"L_BAN_USER"=>$lang["Ban_username"],
"L_BAN_USER_EXPLAIN"=>$lang["Ban_username_explain"],
"L_BAN_IP"=>$lang["Ban_IP"],
"L_BAN_IP_EXPLAIN"=>$lang["Ban_IP_explain"],
"L_BAN_EMAIL"=>$lang["Ban_email"],
"L_BAN_EMAIL_EXPLAIN"=>$lang["Ban_email_explain"])
);

$userban_count=0;
$ipban_count=0;
$emailban_count=0;

$sql="SELECTb.ban_id,u.user_id,u.username
FROM".BANLIST_TABLE."b,".USERS_TABLE."u
WHEREu.user_id=b.ban_userid
ANDb.ban_userid<>0
ANDu.user_id<>".ANONYMOUS."
ORDERBYu.user_idASC";
if(!($result=$db->sql_query($sql)))
{
message_die(GENERAL_ERROR,"Couldnotselectcurrentuser_idbanlist","",__LINE__,__FILE__,$sql);
}

$user_list=$db->sql_fetchrowset($result);
$db->sql_freeresult($result);

$select_userlist="";
for($i=0;$i<count($user_list);$i++)
{
$select_userlist.="<optionvalue="".$user_list[$i]["ban_id"]."">".$user_list[$i]["username"]."</option>";
$userban_count++;
}

if($select_userlist=="")
{
$select_userlist="<optionvalue="-1">".$lang["No_banned_users"]."</option>";
}

$select_userlist="<selectname="unban_user[]"multiple="multiple"size="5">".$select_userlist."</select>";

$sql="SELECTban_id,ban_ip,ban_email
FROM".BANLIST_TABLE;
if(!($result=$db->sql_query($sql)))
{
message_die(GENERAL_ERROR,"Couldnotselectcurrentipbanlist","",__LINE__,__FILE__,$sql);
}

$banlist=$db->sql_fetchrowset($result);
$db->sql_freeresult($result);

$select_iplist="";
$select_emaillist="";

for($i=0;$i<count($banlist);$i++)
{
$ban_id=$banlist[$i]["ban_id"];

if(!empty($banlist[$i]["ban_ip"]))
{
$ban_ip=str_replace("255","*",decode_ip($banlist[$i]["ban_ip"]));
$select_iplist.="<optionvalue="".$ban_id."">".$ban_ip."</option>";
$ipban_count++;
}
elseif(!empty($banlist[$i]["ban_email"]))
{
$ban_email=$banlist[$i]["ban_email"];
$select_emaillist.="<optionvalue="".$ban_id."">".$ban_email."</option>";
$emailban_count++;
}
}

if($select_iplist=="")
{
$select_iplist="<optionvalue="-1">".$lang["No_banned_ip"]."</option>";
}

if($select_emaillist=="")
{
$select_emaillist="<optionvalue="-1">".$lang["No_banned_email"]."</option>";
}

$select_iplist="<selectname="unban_ip[]"multiple="multiple"size="5">".$select_iplist."</select>";
$select_emaillist="<selectname="unban_email[]"multiple="multiple"size="5">".$select_emaillist."</select>";

$template->assign_vars(array(
"L_UNBAN_USER"=>$lang["Unban_username"],
"L_UNBAN_USER_EXPLAIN"=>$lang["Unban_username_explain"],
"L_UNBAN_IP"=>$lang["Unban_IP"],
"L_UNBAN_IP_EXPLAIN"=>$lang["Unban_IP_explain"],
"L_UNBAN_EMAIL"=>$lang["Unban_email"],
"L_UNBAN_EMAIL_EXPLAIN"=>$lang["Unban_email_explain"],
"L_USERNAME"=>$lang["Username"],
"L_LOOK_UP"=>$lang["Look_up_User"],
"L_FIND_USERNAME"=>$lang["Find_username"],

"U_SEARCH_USER"=>append_sid("search.$phpEx?mode=searchuser&popup=1&menu=1"),
"S_UNBAN_USERLIST_SELECT"=>$select_userlist,
"S_UNBAN_IPLIST_SELECT"=>$select_iplist,
"S_UNBAN_EMAILLIST_SELECT"=>$select_emaillist,
"S_BAN_ACTION"=>append_sid("admin_user_ban.$phpEx"))
);
}

$template->pparse("body");

include("./page_footer_admin.".$phpEx);

?>