#!/bin/sh

export DATE="01.oktober.2005"
export TITLE="Verwaltung: Weimarnetz-Einstellungen"
. ${0%/*}/cgi-bin-pre.sh

cat<<EOF
<h1>Verwaltung: Weimarnetz-Einstellungen v1.5</h1>
<script type="text/javascript">
var hexcase = 0;
var b64pad  = ""; 
var chrsz   = 8;

function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

function bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}


function genhexkeys(form) {
	psk = form.ff_wep_psk.value;  
	if(psk.length < 8) {
		alert('Das Passwort ist zu kurz, bitte mindestens 8 Zeichen eingeben');
		return false;
	} else {
		//salt for strings with only one char
		psk = psk+'tslx'
		//rotate thru the string
		form.wl0_key1.value = hex_md5(psk).slice(0,26);
		
		form.wl0_key2.value = hex_md5(psk.substr(2)+psk.substr(0,2)).slice(0,26);
		form.wl0_key3.value = hex_md5(psk.substr(4)+psk.substr(0,4)).slice(0,26);
		form.wl0_key4.value = hex_md5(psk.substr(6)+psk.substr(0,6)).slice(0,26);
		
		return true;
	}
}


</script>
EOF

if [ "$REQUEST_METHOD" = "POST" ]; then
  read QUERY_STRING
fi

if [ -z "$QUERY_STRING" ]; then
  #Speedups
  wl0_antdiv="$(nvram get wl0_antdiv)"
  ff_txant="$(nvram get ff_txant)"
  wl0_gmode="$(nvram get wl0_gmode)"
  wl0_rateset="$(nvram get wl0_rateset)"
  wl0_rate="$(nvram get wl0_rate)"
  wl0_closed="$(nvram get wl0_closed)"
  wl0_mode="$(nvram get wl0_mode)"
  wl0_infra="$(nvram get wl0_infra)"
  wl0_lazywds="$(nvram get wl0_lazywds)"
  wl0_wds="$(nvram get wl0_wds)"
  wl0_wep="$(nvram get wl0_wep)"

  weimarnetz_gebiet="$(nvram get weimarnetz_gebiet)"
  weimarnetz_knotennummer="$(nvram get weimarnetz_knotennummer)"
  wan_domain="$(nvram get wan_domain)"
  wan_hostname="$(nvram get wan_hostname)"
  ff_mtu="$(nvram get ff_mtu)"

cat<<EOF
<form
  action="weimarnetz.html" method="post"> <table border="0" class="form"><tbody><tr
  title="WEP ist eine (schwache) Verschl&uuml;sselung des Datenverkehrs."><td>
<input name="wl0_wep" type="hidden" value="on">
  <input type="hidden" name="wl0_wep_bit" value="128" /></tr><tr


  title="Passwort mit mindestens 8 Zeichen eingeben."><td>Verschl&uuml;sselungs-Passwort:</td><td>
  	<input style="font-family:courier;" name="ff_wep_psk" size="20" type="text" maxLength="15" value="$(nvram get ff_wep_psk)" />
  	<input style="font-family:courier;" name="genkeys" type="button" value="Schlüssel erzeugen" onclick=genhexkeys(this.form) /></td></tr>
  	<tr><td>Erzeugter WEP-Schl&uuml;ssel:</td><td>
  	
  	<input style="font-family:courier;" name="wl0_key1" size="32" type="text" maxLength="26" value="$(nvram get wl0_key1)" /></td></tr><tr><td></td><td>
  	<input type="hidden" style="font-family:courier;" name="wl0_key2" size="32" type="text" maxLength="26" value="$(nvram get wl0_key2)" /></td></tr><tr><td></td><td>
  	<input type="hidden" style="font-family:courier;" name="wl0_key3" size="32" type="text" maxLength="26" value="$(nvram get wl0_key3)" /></td></tr><tr><td></td><td>
  	
  	<input type="hidden" style="font-family:courier;" name="wl0_key4" size="32" type="text" maxLength="26" value="$(nvram get wl0_key4)" /></td></tr>

        
        <input name="wan_hostname" type="hidden" value="linksys" />
        <tr><td>Kurzname deines Hausnetzes:</td>
            <td><input name="wan_domain" size="10" type="text" value="$(nvram get wan_domain)" />&nbsp; (z.b. "herderpl4" oder "bahnstr12")</td>

  	<tr><td>Dein Wohngebiet: </td><td>
  	 <select name="weimarnetz_gebiet">
  	  <option value="1" $(if [ "$weimarnetz_gebiet" = "1" ];then echo 'selected';fi)>Gebiet 1 - rund ums kath. Krankenhaus</option>
  	  <option value="2" $(if [ "$weimarnetz_gebiet" = "2" ];then echo 'selected';fi)>Gebiet 2 - rund um die Jakobskirche</option>
          <option value="3" $(if [ "$weimarnetz_gebiet" = "3" ];then echo 'selected';fi)>Gebiet 3 - rund um den Herderplatz</option>
          <option value="4" $(if [ "$weimarnetz_gebiet" = "4" ];then echo 'selected';fi)>Gebiet 4 - rund um das LVA</option>
          <option value="5" $(if [ "$weimarnetz_gebiet" = "5" ];then echo 'selected';fi)>Gebiet 5 - rund um den Kunstturm/Bahnhof</option>
          <option value="6" $(if [ "$weimarnetz_gebiet" = "6" ];then echo 'selected';fi)>Gebiet 6 - in WeimarWest</option>
          <option value="7" $(if [ "$weimarnetz_gebiet" = "7" ];then echo 'selected';fi)>Gebiet 7 - rund um die K&auml;theKollwitz-Schule</option>
          <option value="9" $(if [ "$weimarnetz_gebiet" = "9" ];then echo 'selected';fi)>Gebiet 9 - in Weimar/Taubach</option>
          <option value="10" $(if [ "$weimarnetz_gebiet" = "10" ];then echo 'selected';fi)>Gebiet 10 - am Sch&ouml;nblick</option>
          <option value="11" $(if [ "$weimarnetz_gebiet" = "11" ];then echo 'selected';fi)>Gebiet 11 - in WeimarNord</option>
          <option value="12" $(if [ "$weimarnetz_gebiet" = "12" ];then echo 'selected';fi)>Gebiet 12 - in Oberweimar</option>
          <option value="13" $(if [ "$weimarnetz_gebiet" = "13" ];then echo 'selected';fi)>Gebiet 13 - rund ums Wohnheim "Merketal"</option>
          <option value="14" $(if [ "$weimarnetz_gebiet" = "14" ];then echo 'selected';fi)>Gebiet 14 - rund um die Mensa/Park</option>
          <option value="100" $(if [ "$weimarnetz_gebiet" = "100" ];then echo 'selected';fi)>Gebiet 100 - in Heichelheim</option>
  	 </select></td></tr>
        <tr><td valign="top">Deine Netzknotennummer: </td><td><input name="weimarnetz_knotennummer" size="3" type="text" value="$(nvram get weimarnetz_knotennummer)" />&nbsp;
        &nbsp;<a href="http://wireless.subsignal.org/wiki/index.php/IP_schon_vergeben">siehe www.weimarnetz.de</a><br>TIP: trage 254 ein, wenn du dir<br>nicht sicher bist und suche dir dann<br>schnell eine richtige Nummer im Internet aus.</td></tr>
        

  	<tr><td>
  	 <input name="ff_lan_proto" type="hidden" value="1">
  	 <input name="lan_proto" type="hidden" value="static">
         <input name="lan_netmask" type="hidden" value="255.255.255.0">
         <input name="wan_dns" type="hidden" value="">
         <input name="ff_nonat" type="hidden" value="1">
         <input name="fw_disable" type="hidden" value="1">
         <input name="dhcp_start" type="hidden" value="100">
         <input name="dhcp_num" type="hidden" value="50">
         <input name="dhcp_lease" type="hidden" value="3600">
 
         <input name="wl0_ssid" type="hidden" value="weimarnetz.de">
         <input name="wl0_channel" type="hidden" value="3">
         <input name="wifi_netmask" type="hidden" value="255.240.0.0">
         <input name="wifi_proto" type="hidden" value="static">
         
         <input name="ff_txpwr" type="hidden" value="28">
         <input name="wl0_gmode" type="hidden" value="2">
         <input name="wl0_rateset" type="hidden" value="default">
         <input name="wl0_rate" type="hidden" value="0">
         <input name="wl0_gmode_protection" type="hidden" value="auto">
         <input name="wl0_frameburst" type="hidden" value="off">
         <input name="wl0_rts" type="hidden" value="250">
         <input name="ff_mtu" type="hidden" value="1500">
         
         <input name="wl0_frag" type="hidden" value="500">
         <input name="wan_dns" type="hidden" value="141.54.1.3">
         <input name="wl0_infra" type="hidden" value="0">
         <input name="wl0_mode" type="hidden" value="sta">  
      </td></tr>

  	<tr><td colspan="2"> </td></tr><tr><td
  colspan="2"><input name="post_wireless" title="Die Einstellungen übernehmen. Diese werden erst nach einem Neustart wirksam."
  type="submit" value="Übernehmen" />   <input
  name="post_abort"
  title="Abbruch dieser Dialogseite"
  type="submit" value="Abbruch" /></td></tr>
</tbody></table></form>
<hr>
<a href="http://wireless.subsignal.org/index.php/Herbst-29"><img src="/images/weimarnetz.jpg" title="Outdoor-Linksys,Herbststr.29" alt="Outdoor-Linksys,Herbststr.29"></a>
<hr>
Hier ist die Kontonummer fuer die monatliche Spende eurer Wahl ans Weimarnetz:<br>
Konto-Inhaber: Lars Mai<br>
Kontonummer: 2853570<br>
BLZ: 82070024 (Deutsche Bank)
<hr>

EOF

else

eval $(echo "$QUERY_STRING"|awk -F'&' '{for(i=1;i<=NF;i++){print $i}}')
  DIRTY=
  if [ -n "$post_wireless" ]; then
    for V in wan_dns wl0_frag ff_mtu wl0_mode wl0_infra wifi_proto ff_lan_proto lan_proto weimarnetz_knotennummer weimarnetz_gebiet wan_hostname wan_domain wl0_wep ff_wep_psk wl0_key1 wl0_key2 wl0_key3 wl0_key4 wl0_wep_bit lan_ipaddr lan_netmask wan_dns ff_nonat fw_disable dhcp_start dhcp_num dhcp_lease wifi_ipaddr wl0_ssid wl0_channel wifi_netmask ff_hna4 ff_cvs ff_txpwr wl0_gmode wl0_rate wl0_gmode_protection wl0_frameburst wl0_rts ; do
      eval "C=\$$V"
      C=$(unescape $C)
       if [ "$V" = "weimarnetz_knotennummer" ]; then weknot=$C; fi
       if [ "$V" = "weimarnetz_gebiet" ]; then wezone=$C; fi
       if [ "$V" = "lan_ipaddr" ]; then C="10.$wezone.$weknot.254"; fi
       if [ "$V" = "wifi_ipaddr" ]; then C="172.16.$wezone.$weknot"; fi
       if [ "$V" = "ff_hna4" ]; then C="10.$wezone.$weknot.0/24"; fi
      if [ "$C" != "$(nvram get $V)" ]; then
        DIRTY=1
        nvram set $V="$C"
        echo "geaendert: $V = $C ...<br>"
      fi
    done
    # bad,bad,bad. reason is: we need to alter more than one nvram 
    # variables depending on the value of wl0_mode if anyone knows
    # a better way to handle this, please change.
    eval "C=\$wl0_mode"
    C=$(unescape $C)
    if [ "$C" != "$(nvram get $wl0_mode)" ]; then
      DIRTY=1
      if [ $wl0_mode = "ap" ]; then
        nvram set wl0_mode=ap
      elif [ $wl0_mode = "sta_infra" ]; then
        nvram set wl0_mode=sta
        nvram set wl0_infra=1
        nvram set wl0_lazywds=0
        nvram set wl0_wds=""
        
      elif [ $wl0_mode = "sta_adhoc" ]; then
        nvram set wl0_mode=sta
        nvram set wl0_infra=0
        nvram set wl0_lazywds=0
        nvram set wl0_wds=""
      fi
    fi
  fi
  if [ -n "$DIRTY" ]; then
    nvram set lan_ifnames="vlan0 vlan2 eth2 eth3"
    nvram set lan_ifname=br0
    nvram commit>/dev/null 2>&1

cat<<EOF
<table bgcolor="#FF99FF"
  border="0" style="border: 2px solid black;"><tbody><tr><td>Die
  geänderten Einstellungen wurden übernommen. Die Einstellungen sind erst beim
  nächsten <a href="reset.html">Neustart</a> aktiv.</td></tr></tbody></table>
EOF

else

cat<<EOF
<table
  bgcolor="#FF99FF" border="0" style="border: 2px solid black;"><tbody><tr><td>Es wurden keine Einstellungen geändert.</td></tr></tbody></table>
EOF

fi
fi

. ${0%/*}/cgi-bin-post.sh