<?php

/* $Id$ */
/*
	openbgpd.inc
    Copyright (C) 2007 Scott Ullrich (sullrich@gmail.com)
	part of pfSense
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/

function openbgpd_install_conf() {
	global $config, $g;
	
	conf_mount_rw();
	
  if ($config['installedpackages']['openbgpd']['rawconfig'] && $config['installedpackages']['openbgpd']['rawconfig']['item']) {
    // if there is a raw config specifyed in tthe config.xml use that instead of the assisted config
    $conffile = implode("\n",$config['installedpackages']['openbgpd']['rawconfig']['item']);
    //$conffile = $config['installedpackages']['openbgpd']['rawconfig'];
  } else {
    // generate bgpd.conf based on the assistant
    if($config['installedpackages']['openbgpd']['config']) 
      $openbgpd_conf = &$config['installedpackages']['openbgpd']['config'][0];
    if($config['installedpackages']['openbgpd']['config'][0]['row'])
      $openbgpd_rows = &$config['installedpackages']['openbgpd']['config'][0]['row'];	
    if($config['installedpackages']['openbgpdgroups']['config'])
      $openbgpd_groups = &$config['installedpackages']['openbgpdgroups']['config'];
    if($config['installedpackages']['openbgpdneighbors']['config'])
      $openbgpd_neighbors = &$config['installedpackages']['openbgpdneighbors']['config'];
    
    $conffile = "# This file was created by the pfSense package manager.  Do not edit!\n\n";
    $setkeycf = "";
    
    // Setup AS #
    if($openbgpd_conf['asnum']) 
      $conffile .= "AS {$openbgpd_conf['asnum']}\n";
    
    // Setup holdtime if defined.  Default is 90.
    if($openbgpd_conf['holdtime']) 
      $conffile .= "holdtime {$openbgpd_conf['holdtime']}\n";

    // Specify listen ip
    if($openbgpd_conf['listenip']) 
      $conffile .= "listen on {$openbgpd_conf['listenip']}\n";

    // Specify router id
    if($openbgpd_conf['routerid']) 
      $conffile .= "router-id {$openbgpd_conf['routerid']}\n";

    // Handle advertised networks
    if($config['installedpackages']['openbgpd']['config'][0]['row'])
      if(is_array($openbgpd_rows))
        foreach($openbgpd_rows as $row) 
          $conffile .= "network {$row['networks']}\n";
    
    // Attach neighbors to their respective group owner
    if(is_array($openbgpd_groups)) {	
      foreach($openbgpd_groups as $group) {
        $conffile .= "group \"{$group['name']}\" {\n";
        $conffile .= "	remote-as {$group['remoteas']}\n";
        if(is_array($openbgpd_neighbors)) {
          foreach($openbgpd_neighbors as $neighbor) {
            if($neighbor['groupname'] == $group['name']) {
              $conffile .= "		neighbor {$neighbor['neighbor']} {\n";
			  $conffile .= "    	 descr \"{$neighbor['descr']}\"\n";
	      $setkeycf .= "delete {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000;\n";
              if($neighbor['md5sigpass']) {
		$setkeycf .= "add {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000 -A tcp-md5 \"{$neighbor['md5sigpass']}\";\n";
                $conffile .= "		tcp md5sig password {$neighbor['md5sigpass']}\n";
	      }
              if($neighbor['md5sigkey']) {
		$setkeycf .= "add {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000 -A tcp-md5 0x{$neighbor['md5sigkey']};\n";
                $conffile .= "		tcp md5sig key {$neighbor['md5sigkey']}\n";
	      }
              foreach($neighbor['row'] as $row) {
                $conffile .= "		{$row['paramaters']} {$row['parmvalue']} \n";
              }		
              $conffile .= "}\n";
            }
          }
        }
        $conffile .= "}\n";
      }
    }	

    // Handle neighbors that do not have a group assigned to them	
    if(is_array($openbgpd_neighbors)) {
      foreach($openbgpd_neighbors as $neighbor) {
        $used_this_item = false;
        if($neighbor['groupname'] == "") {
          $conffile .= "neighbor {$neighbor['neighbor']} {\n";
          $conffile .= "		descr \"{$neighbor['descr']}\"\n";
	  $setkeycf .= "delete {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000;\n";
	  if  ($neighbor['md5sigpass']) {
		$setkeycf .= "add {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000 -A tcp-md5 \"{$neighbor['md5sigpass']}\";\n";
		$conffile .= "	tcp md5sig password {$neighbor['md5sigpass']}\n";
	  }
	  if ($neighbor['md5sigkey']) {
		$setkeycf .= "add {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000 -A tcp-md5 0x{$neighbor['md5sigkey']};\n";
		$conffile .= "	tcp md5sig key {$neighbor['md5sigkey']}\n";
	  }
          $used_this_item = true;
          foreach($neighbor['row'] as $row) {
            $conffile .= "	{$row['paramaters']} {$row['parmvalue']} \n";
          }
        }
		if($used_this_item)
			$conffile .= "}\n";
      }
    }	
    
    // OpenBGPD filters
    $conffile .= "deny from any\n";
    $conffile .= "deny to any\n";
    if(is_array($openbgpd_neighbors)) {
      foreach($openbgpd_neighbors as $neighbor) {
        $conffile .= "allow from {$neighbor['neighbor']}\n";
        $conffile .= "allow to {$neighbor['neighbor']}\n";	
      }
    }
  }

  $fd = fopen("/usr/local/etc/bgpd.conf", "w");
	
  // Write out the configuration file
	fwrite($fd, $conffile);
	
	// Close file handle
	fclose($fd);
	
	// Create rc.d file
	$fd = fopen("/usr/local/etc/rc.d/bgpd.sh","w");
	fwrite($fd, "#!/bin/sh\n\n");
	fwrite($fd, "# This file was created by the pfSense package manager.  Do not edit!\n\n");	
	fwrite($fd, "NUMBGPD=`ps auxw | grep bgpd | grep parent | grep -v grep | wc -l | awk '{print \$1}'`\n");
	fwrite($fd, "# echo \$NUMBGPD\n");
	fwrite($fd, "if [ \$NUMBGPD -lt 0 ] ; then\n");
	fwrite($fd, "  /usr/local/sbin/bgpd -f /usr/local/etc/bgpd.conf\n");
	fwrite($fd, "fi\n");
	fclose($fd);
	exec("chmod a+rx /usr/local/etc/rc.d/bgpd.sh");
	exec("chmod a-rw /usr/local/etc/bgpd.conf");
	exec("chmod u+rw /usr/local/etc/bgpd.conf");
	
	// TCP-MD5 support on freebsd. See tcp(5) for more
	$fd = fopen("{$g['tmp_path']}/bgpdsetkey.conf", "w");
	fwrite($fd, $setkeycf );
	fclose($fd);
	exec("setkey -f {$g['tmp_path']}/bgpdsetkey.conf");

	// bgpd process running?  if so reload, elsewise start.
	if(is_openbgpd_running() == true) {
		exec("bgpctl reload");
	} else {
		exec("bgpd");
	}
	
	conf_mount_ro();
}

// get the raw openbgpd confi file for manual inspection/editing
function openbgpd_get_raw_config() {
  return file_get_contents("/usr/local/etc/bgpd.conf");
}

// serialize the raw openbgpd confi file to config.xml
function openbgpd_put_raw_config($conffile) {
  global $config;
  if ($conffile == "")
    unset($config['installedpackages']['openbgpd']['rawconfig']);
  else {
    $config['installedpackages']['openbgpd']['rawconfig'] = array();
    $config['installedpackages']['openbgpd']['rawconfig']['item'] = explode("\n",$_POST['openbgpd_raw']);
    //$config['installedpackages']['openbgpd']['rawconfig'] = $conffile;
  }
}

function deinstall_openbgpd() {
	global $config, $g;

	if($config['installedpackages']['openbgpd']['config'])
		$openbgpd_conf = &$config['installedpackages']['openbgpd']['config'][0];
	if($config['installedpackages']['openbgpdneighbors']['config'])
		$openbgpd_neighbors = &$config['installedpackages']['openbgpdneighbors']['config'];
	$setkeycf = "";
	if(is_array($openbgpd_neighbors)) {
		foreach($openbgpd_neighbors as $neighbor)
			$setkeycf .= "delete {$openbgpd_conf['listenip']} {$neighbor['neighbor']} tcp 0x1000;\n";
	}
	// Clear all SADB entries used.
	$fd = fopen("{$g['tmp_path']}/bgpdsetkey.conf", "w");
        fwrite($fd, $setkeycf );
        fclose($fd);
        exec("setkey -f {$g['tmp_path']}/bgpdsetkey.conf");

	exec("rm /usr/local/etc/rc.d/bgpd.sh");
	exec("rm /usr/local/www/openbgpd_status.php");
	exec("killall bgpd");
}

function check_group_usage($groupname) {
	global $config, $g;

	if($config['installedpackages']['openbgpd']['config']) 
		$openbgpd_conf = &$config['installedpackages']['openbgpd']['config'][0];
	if($config['installedpackages']['openbgpd']['config'][0]['row'])
		$openbgpd_rows = &$config['installedpackages']['openbgpd']['config'][0]['row'];	
	if($config['installedpackages']['openbgpdgroups']['config'])
		$openbgpd_groups = &$config['installedpackages']['openbgpdgroups']['config'];
	if($config['installedpackages']['openbgpdneighbors']['config'])
		$openbgpd_neighbors = &$config['installedpackages']['openbgpdneighbors']['config'];

	if(is_array($openbgpd_groups)) {	
		foreach($openbgpd_groups as $group) {
			foreach($openbgpd_neighbors as $neighbor) {
				if($neighbor['groupname'] == $group['name']) 
					return $neighbor['groupname'];
			}
		}
	}
	return "";
}

function grey_out_value_boxes() {
	echo <<<EOF
	<script language="javascript">
		function grey_out_value_boxes() {
			var x = 0;
			for(x=0; x<99; x++) {
				if( \$('paramaters' + x) ) {
					var fieldvalue = $('paramaters' + x).options[$('paramaters' + x).selectedIndex].text;
					var length = fieldvalue.length;
					length = length -2;
					var last_two = fieldvalue.substring(length);
					var without_last_two = fieldvalue.substring(0,length);
					if( \$('parmvalue' + x) ) {
						if(last_two != ' X') {			
							\$('parmvalue' + x).value = '';
							\$('parmvalue' + x).disabled = true;
						} else {
							\$('parmvalue' + x).disabled = false;
						}
					}
				}
			}
			var timerID  = setTimeout("grey_out_value_boxes()", 1200);
			
		}	
		grey_out_value_boxes();
	</script>	

	
EOF;
		
}

function is_openbgpd_running() {
	$status = `ps awux | grep bgpd | grep "parent" | grep -v grep | wc -l | awk '{ print \$1 }'`;
	if(intval($status) > 0) 
		return true;
	else 
		return false;
}

?>