{"id":5969,"date":"2022-07-20T10:47:48","date_gmt":"2022-07-20T10:47:48","guid":{"rendered":"https:\/\/www.practicallynetworked.com\/?page_id=5969"},"modified":"2022-07-20T10:56:23","modified_gmt":"2022-07-20T10:56:23","slug":"ipv4-to-ipv6-convertor","status":"publish","type":"page","link":"https:\/\/www.practicallynetworked.com\/ipv4-to-ipv6-convertor\/","title":{"rendered":"IPv4 to IPv6 Convertor"},"content":{"rendered":"\n<p>This is a handy tool that can help you convert your IPv4 addresses to IPv6.<\/p>\n\n\n\n<p>To use it, simply enter the IPv4 address in the text field below and click on the &#8220;Convert&#8221; button. The tool will then display the converted IPv6 address below.<\/p>\n\n\n\n<a name=\"ip46\"><\/a>\n<table>\n<tbody><tr><td>IPv4 Address:<\/td><td><input type=\"text\" id=\"ipcnv4\" value=\"192.168.0.1\" onchange=\"ipcnvfrom4()\"><input type=\"button\" onclick=\"ipcnvfrom4()\" value=\"Convert\"><\/td><td>Please use dotted decimal notation.<\/td><\/tr>\n<tr><td>IPv6 Address:<\/td><td><input type=\"text\" id=\"ipcnv6\" value=\"::C0A8:1\" onchange=\"ipcnvfrom6()\"><input type=\"button\" onclick=\"ipcnvfrom6()\" value=\"Convert\"><\/td><td>Please use hexadecimal notation with the relevant 32 bits to the far right.<\/td><\/tr>\n<\/tbody><\/table>\n\n\n\n<p>\n<script language=\"JavaScript\">\r\n<!--\r\n\/\/hide the warning, JavaScript works...\r\ndocument.getElementById(\"warn\").style.display=\"none\";\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ generic functions\r\n\r\n\/\/convert hex to decimal\r\nfunction hex2dec(val)\r\n{\r\n  return parseInt(\"0x\"+val);\r\n}\r\n\r\nfunction dec2hex(val)\r\n{\r\n  var str=\"\";\r\n  var minus=false;\r\n  if(val<0){minus=true;val*=-1;}\r\n  val=Math.floor(val);\r\n  while(val>0){\r\n    var v=val%16;\r\n    val\/=16;val=Math.floor(val);\r\n    switch(v){\r\n      case 10:v=\"A\";break;\r\n      case 11:v=\"B\";break;\r\n      case 12:v=\"C\";break;\r\n      case 13:v=\"D\";break;\r\n      case 14:v=\"E\";break;\r\n      case 15:v=\"F\";break;\r\n    }\r\n    str=v + str;\r\n  }\r\n  if(str==\"\")str=\"0\";\r\n  if(minus)str=\"-\"+str;\r\n  return str;\r\n}\r\n\r\nfunction dec2hexlen(val,minlen)\r\n{\r\n  var str=dec2hex(val);\r\n  while(str.length<minlen)str=\"0\"+str;\r\n  return str;\r\n}\r\n\r\n\/\/generate a null ipv6 array\r\nfunction ip6null()\r\n{\r\n  var ar=new Array;\r\n  for(var i=0;i<8;i++)ar[i]=0;\r\n  return ar;\r\n}\r\n\r\n\/\/convert ipv6 string to array\r\nfunction parseIp6(str)\r\n{\r\n  \/\/init\r\n  var ar=new Array;\r\n  for(var i=0;i<8;i++)ar[i]=0;\r\n  \/\/check for trivial IPs\r\n  if(str==\"::\")return ar;\r\n  \/\/parse\r\n  var sar=str.split(':');\r\n  var slen=sar.length;\r\n  if(slen>8)slen=8;\r\n  var j=0;\r\n  for(var i=0;i<slen;i++){\r\n    \/\/this is a \"::\", switch to end-run mode\r\n    if(i && sar[i]==\"\"){j=9-slen+i;continue;}\r\n    ar[j]=parseInt(\"0x0\"+sar[i]);\r\n    j++;\r\n  }\r\n  \r\n  return ar;\r\n}\r\n\r\n\/\/convert ipv6 array to string\r\nfunction ip6toString(ar)\r\n{\r\n  \/\/init\r\n  var str=\"\";\r\n  \/\/find longest stretch of zeroes\r\n  var zs=-1,zsf=-1;\r\n  var zl=0,zlf=0;\r\n  var md=0;\r\n  for(var i=0;i<8;i++){\r\n    if(md){\r\n      if(ar[i]==0)zl++;\r\n      else md=0;\r\n    }else{\r\n      if(ar[i]==0){zs=i;zl=1;md=1;}\r\n    }\r\n    if(zl>2 && zl>zlf){zlf=zl;zsf=zs;}\r\n  }\r\n  \/\/print\r\n  for(var i=0;i<8;i++){\r\n    if(i==zsf){\r\n      str+=\":\";\r\n      i+=zlf-1;\r\n      if(i>=7)str+=\":\";\r\n      continue;\r\n    }\r\n    if(i)str+=\":\";\r\n    str+=dec2hex(ar[i]);\r\n  }\r\n\/\/   alert(\"printv6 str=\"+str+\" zsf=\"+zsf+\" zlf=\"+zlf);\r\n  return str;\r\n}\r\n\r\n\/\/create a mask from a prefix\r\nfunction ip6prefixToMask(prf)\r\n{\r\n  var ar=new Array;\r\n  for(var i=0;i<8;i++){\r\n    if(prf>=16)ar[i]=0xffff;\r\n    else switch(prf){\r\n      case 1:ar[i]=0x8000;break;\r\n      case 2:ar[i]=0xc000;break;\r\n      case 3:ar[i]=0xe000;break;\r\n      case 4:ar[i]=0xf000;break;\r\n      case 5:ar[i]=0xf800;break;\r\n      case 6:ar[i]=0xfc00;break;\r\n      case 7:ar[i]=0xfe00;break;\r\n      case 8:ar[i]=0xff00;break;\r\n      case 9:ar[i]=0xff80;break;\r\n      case 10:ar[i]=0xffc0;break;\r\n      case 11:ar[i]=0xffe0;break;\r\n      case 12:ar[i]=0xfff0;break;\r\n      case 13:ar[i]=0xfff8;break;\r\n      case 14:ar[i]=0xfffc;break;\r\n      case 15:ar[i]=0xfffe;break;\r\n      default:ar[i]=0;break;\r\n    }\r\n    prf-=16;\r\n  }\r\n  return ar;\r\n}\r\n\r\nfunction ip6mask(ip,prf)\r\n{\r\n  if(typeof(prf)==\"number\")prf=ip6prefixToMask(prf);\r\n  var ip2=new Array;\r\n  for(var i=0;i<8;i++)ip2[i] = ip[i] & prf[i];\r\n  return ip2;\r\n}\r\n\r\nfunction ip6maskHost(ip,prf)\r\n{\r\n  if(typeof(prf)==\"number\")prf=ip6prefixToMask(prf);\r\n  else prf=ip6copy(prf);\r\n  for(var i=0;i<8;i++)prf[i]=(~prf[i])&0xffff;\r\n  var ip2=new Array;\r\n  for(var i=0;i<8;i++)ip2[i] = ip[i] & prf[i];\r\n  return ip2;\r\n}\r\n\r\nfunction ip6copy(ip)\r\n{\r\n  var r=new Array;\r\n  for(var i=0;i<8;i++)r[i]=ip[i];\r\n  return r;\r\n}\r\n\r\nfunction ip6shiftleft(ip,left)\r\n{\r\n  if(left==0)return ip;\r\n  if(left<0)return ip6shiftright(ip,-left);\r\n  if(left>=128)return ip6null();\r\n  var legs=Math.floor(left\/16);\r\n  var bits=Math.floor(left&0xf);\r\n  var r=ip6null()\r\n  for(var i=0;(i+legs)<8;i++){\r\n    \/\/move by legs\r\n    r[i]=ip[i+legs];\r\n    \/\/move by bits\r\n    if(bits<=0)continue;\r\n    if(i)r[i-1]|=Math.floor(r[i]>>(16-bits));\r\n    r[i]<<=bits;\r\n    r[i]&=0xffff;\r\n  }\r\n  return r;\r\n}\r\n\r\nfunction ip6shiftright(ip,right)\r\n{\r\n  if(right==0)return ip;\r\n  if(right<0)return ip6shiftleft(ip,-right);\r\n  if(right>=128)return ip6null();\r\n  var legs=Math.floor(right\/16);\r\n  var bits=Math.floor(right&0xf);\r\n  var r=ip6null()\r\n  for(var i=7;i>=legs;i--){\r\n    \/\/move by legs\r\n    r[i]=ip[i-legs];\r\n    \/\/move by bits\r\n    if(bits<=0)continue;\r\n    if(i<=7)r[i+1]|=Math.floor(r[i]<<(16-bits))&0xffff;\r\n    r[i]>>=bits;\r\n    r[i]&=0xffff;\r\n  }\r\n  return r;\r\n}\r\n\r\nfunction ip6merge(net,host,prefix)\r\n{\r\n  net=ip6mask(net,prefix);\r\n  host=ip6maskHost(host,prefix);\r\n  for(var i=0;i<8;i++)net[i] |= host[i];\r\n  return net;\r\n}\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ hide and seek^W show\r\nfunction showIp4()\r\n{\r\n  document.getElementById(\"ip4show\").style.display=\"none\";\r\n  document.getElementById(\"ip4\").style.display=\"block\";\r\n}\r\nfunction hideIp4()\r\n{\r\n  document.getElementById(\"ip4show\").style.display=\"block\";\r\n  document.getElementById(\"ip4\").style.display=\"none\";\r\n}\r\n\r\nfunction showIp46()\r\n{\r\n  document.getElementById(\"ip46show\").style.display=\"none\";\r\n  document.getElementById(\"ip46\").style.display=\"block\";\r\n}\r\nfunction hideIp46()\r\n{\r\n  document.getElementById(\"ip46show\").style.display=\"block\";\r\n  document.getElementById(\"ip46\").style.display=\"none\";\r\n}\r\n\r\nfunction showIp6()\r\n{\r\n  document.getElementById(\"ip6show\").style.display=\"none\";\r\n  document.getElementById(\"ip6\").style.display=\"block\";\r\n}\r\nfunction hideIp6()\r\n{\r\n  document.getElementById(\"ip6show\").style.display=\"block\";\r\n  document.getElementById(\"ip6\").style.display=\"none\";\r\n}\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ IPv4 functions\r\n\r\n\/\/used by URLs to set IPv4 address from a specific example\r\nfunction setip4(addr,prefix)\r\n{\r\n  document.getElementById(\"ip4addr\").value=addr;\r\n  document.getElementById(\"ip4prefix\").value=prefix;\r\n  setIp4ByPrefix();\r\n  return false;\r\n}\r\n\r\n\/\/called if the address or prefix changes\r\nfunction setIp4ByPrefix()\r\n{\r\n  calcIp4Mask();\r\n  calcIp4Base();\r\n}\r\n\r\n\/\/called if the mask changes\r\nfunction setIp4ByMask()\r\n{\r\n  calcIp4Prefix();\r\n  calcIp4Base();\r\n}\r\n\r\nfunction calcIp4Mask()\r\n{\r\n  var prf=document.getElementById(\"ip4prefix\").value;\r\n  if(prf>32)prf=32;if(prf<1)prf=1;\r\n  var msk=\"\";\r\n  for(var i=0;i<4;i++){\r\n    if(i)msk+=\".\";\r\n    if(prf>8){\r\n      msk += \"255\";\r\n      prf-=8;\r\n      continue;\r\n    }\r\n    if(prf<=0){\r\n      msk += \"0\";\r\n      continue;\r\n    }\r\n    m=256-(1<<(8-prf));\r\n    msk+=m;\r\n    prf-=8;\r\n  }\r\n  document.getElementById(\"ip4mask\").value=msk;\r\n  document.getElementById(\"ip4mask\").style.color=\"black\";\r\n}\r\n\r\nfunction calcIp4Prefix()\r\n{\r\n  var msk=document.getElementById(\"ip4mask\").value.split(\".\");\r\n  document.getElementById(\"ip4mask\").style.color=\"black\";\r\n  var prf=0;\r\n  for(var i=0;i<4;i++){\r\n    switch(parseInt(msk[i])){\r\n      case 0:prf+=0;break;\r\n      case 128:prf+=1;break;\r\n      case 192:prf+=2;break;\r\n      case 224:prf+=3;break;\r\n      case 240:prf+=4;break;\r\n      case 248:prf+=5;break;\r\n      case 252:prf+=6;break;\r\n      case 254:prf+=7;break;\r\n      case 255:prf+=8;break;\r\n      default:document.getElementById(\"ip4mask\").style.color=\"red\";break;\r\n    }\r\n  }\r\n  document.getElementById(\"ip4prefix\").value=prf;\r\n}\r\n\r\nfunction calcIp4Base()\r\n{\r\n  var ip=document.getElementById(\"ip4addr\").value.split('.');\r\n  var msk=document.getElementById(\"ip4mask\").value.split('.');\r\n  var base=\"\";\r\n  var first=\"\",last=\"\",bcast=\"\",dgw=\"\";\r\n  for(var i=0;i<4;i++){\r\n    if(i){base+=\".\";first+=\".\";last+=\".\";dgw+=\".\";bcast+=\".\";}\r\n    b = parseInt(ip[i]) & parseInt(msk[i]);\r\n    base += \"\" + b;\r\n    l=b | (255-parseInt(msk[i]));\r\n    bcast+=l;\r\n    if(i<3){\r\n      first+=b;\r\n      last+=l;\r\n      dgw+=l;\r\n    }else{\r\n      first+=b+1;\r\n      last+=l-2;\r\n      dgw+=l-1;\r\n    }\r\n  }\r\n  document.getElementById(\"ip4base\").innerHTML=base;\r\n  var prf=parseInt(document.getElementById(\"ip4prefix\").value);\r\n  if(prf<=30){\r\n    document.getElementById(\"ip4first\").innerHTML=first;\r\n    document.getElementById(\"ip4last\").innerHTML=last;\r\n    document.getElementById(\"ip4bcast\").innerHTML=bcast;\r\n    document.getElementById(\"ip4gw\").innerHTML=dgw;\r\n  }else if(prf==31){\r\n    document.getElementById(\"ip4first\").innerHTML=base;\r\n    document.getElementById(\"ip4last\").innerHTML=bcast;\r\n    document.getElementById(\"ip4bcast\").innerHTML=\"n\/a\";\r\n    document.getElementById(\"ip4gw\").innerHTML=\"n\/a\";\r\n  }else{\r\n    document.getElementById(\"ip4first\").innerHTML=base;\r\n    document.getElementById(\"ip4last\").innerHTML=base;\r\n    document.getElementById(\"ip4bcast\").innerHTML=\"n\/a\";\r\n    document.getElementById(\"ip4gw\").innerHTML=\"n\/a\";\r\n  }\r\n}\r\n\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ IPv4 to IPv6 translation functions\r\n\r\nfunction teredocalc()\r\n{\r\n  var tip=parseIp6(document.getElementById(\"teredo\").value);\r\n  var prefix=ip6toString(ip6mask(tip,ip6prefixToMask(32)))+\"\/32\";\r\n  if(tip[0]!=0x2001 || tip[1]!=0)prefix+=\" not a Teredo address!\";\r\n  document.getElementById(\"teredo-prefix\").innerHTML=prefix;\r\n  var ip4 = (tip[2]>>8) + \".\" + (tip[2]&0xff) + \".\" + (tip[3]>>8) + \".\" + (tip[3]&0xff);\r\n  document.getElementById(\"teredo-server\").innerHTML=ip4;\r\n  ip4 = (tip[6]>>8^0xff) + \".\" + (tip[6]&0xff^0xff) + \".\" + (tip[7]>>8^0xff) + \".\" + (tip[7]&0xff^0xff);\r\n  document.getElementById(\"teredo-ip\").innerHTML    =ip4;\r\n  document.getElementById(\"teredo-port\").innerHTML  =tip[5]^0xffff;\r\n  var flags=\"\";\r\n  if(tip[4]&0x8000)flags=\"Cone NAT\";else flags=\"Non Cone NAT\";\r\n  flags+=\" (\"+tip[4]+\")\";\r\n  document.getElementById(\"teredo-flags\").innerHTML =flags;\r\n}\r\nteredocalc();\r\n\r\nfunction ip6fromip4(ip4str)\r\n{\r\n  var ip4=ip4str.split(\".\");\r\n  var ip6=ip6null();\r\n  ip6[6]=parseInt(ip4[0])<<8 | parseInt(ip4[1]);\r\n  ip6[7]=parseInt(ip4[2])<<8 | parseInt(ip4[3]);\r\n  return ip6;\r\n}\r\n\r\nfunction ipcnvfrom4()\r\n{\r\n  var ip6=ip6fromip4(document.getElementById(\"ipcnv4\").value);\r\n  document.getElementById(\"ipcnv6\").value=ip6toString(ip6);\r\n}\r\n\r\nfunction ipcnvfrom6()\r\n{\r\n  var ip6=parseIp6(document.getElementById(\"ipcnv6\").value);\r\n  var ip4=(ip6[6]>>8)+\".\"+(ip6[6]&0xff)+\".\"+(ip6[7]>>8)+\".\"+(ip6[7]&0xff);\r\n  document.getElementById(\"ipcnv4\").value=ip4;\r\n}\r\n\r\nfunction set6to4()\r\n{\r\n  document.getElementById(\"64net\").value=\"2002::\";\r\n  document.getElementById(\"64netprf\").value=\"16\";\r\n  conv64fromisp();\r\n}\r\n\r\nfunction conv64fromisp()\r\n{\r\n  var pprf=parseInt(document.getElementById(\"64netprf\").value);\r\n  var ip6=ip6mask(parseIp6(document.getElementById(\"64net\").value),pprf);\r\n  \/\/convert ip4 to ip6\r\n  var ip4=document.getElementById(\"64ip4\").value;\r\n  var ip4bits=parseInt(document.getElementById(\"64ip4bits\").value);\r\n  if(ip4bits>32)ip4bits=32;\r\n  if(ip4bits<1)ip4bits=1;\r\n  var part=ip6shiftleft(ip6fromip4(ip4),128-ip4bits);\r\n  part=ip6shiftright(part,pprf);\r\n  document.getElementById(\"64ip6\").value=ip6toString(ip6merge(ip6,part,pprf));\r\n  document.getElementById(\"64ip6len\").value=ip4bits+pprf;\r\n}\r\n\r\nfunction conv64toisp()\r\n{\r\n  var ip6=parseIp6(document.getElementById(\"64ip6\").value);\r\n  var ip6prf=parseInt(document.getElementById(\"64ip6len\").value);\r\n  var pprf=parseInt(document.getElementById(\"64netprf\").value);\r\n  document.getElementById(\"64net\").value=ip6toString(ip6mask(ip6,pprf));\r\n  ip6=ip6shiftright(ip6maskHost(ip6,pprf),128-ip6prf);\r\n  var ip4=(ip6[6]>>8)+\".\"+(ip6[6]&0xff)+\".\"+(ip6[7]>>8)+\".\"+(ip6[7]&0xff);\r\n  document.getElementById(\"64ip4\").value=ip4;\r\n  var ip4len=ip6prf-pprf;\r\n  if(ip4len>32)ip4len=32;\r\n  document.getElementById(\"64ip4bits\").value=ip4len;\r\n}\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ IPv6 functions\r\n\r\nfunction mactoeui()\r\n{\r\n  var mac=document.getElementById(\"mac48\").value.replace(\/:\/g,\"-\").split(\"-\");\r\n  if(mac.length!=6){\r\n    alert(\"Not a MAC address.\");\r\n    return;\r\n  }\r\n  var ip6=ip6null();\r\n  ip6[4]=hex2dec(mac[0])<<8 | hex2dec(mac[1]);\r\n  ip6[4] ^= 0x200;\r\n  ip6[5]=hex2dec(mac[2])<<8 | 0xff;\r\n  ip6[6]=hex2dec(mac[3]) | 0xfe00;\r\n  ip6[7]=hex2dec(mac[4])<<8 | hex2dec(mac[5]);\r\n  document.getElementById(\"eui64\").value=ip6toString(ip6);\r\n}\r\n\r\nfunction extractmac(ip6)\r\n{\r\n  if((ip6[5]&0xff)!=0xff || (ip6[6]>>8)!=0xfe)return \"(no MAC)\";\r\n  var mac=dec2hexlen((ip6[4]>>8)^2,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[4]&0xff,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[5]>>8,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[6]&0xff,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[7]>>8,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[7]&0xff,2);\r\n  return mac;\r\n}\r\n\r\nfunction euitomac()\r\n{\r\n  document.getElementById(\"mac48\").value=extractmac(parseIp6(document.getElementById(\"eui64\").value));\r\n}\r\n\r\nfunction splitUpIp6()\r\n{\r\n  var ip6=parseIp6(document.getElementById(\"ip6full\").value);\r\n  var prf=parseInt(document.getElementById(\"ip6fprefix\").value);\r\n  document.getElementById(\"ip6nprefix\").value=prf;\r\n  document.getElementById(\"ip6net\").value=ip6toString(ip6mask(ip6,prf));\r\n  document.getElementById(\"ip6host\").value=ip6toString(ip6maskHost(ip6,prf));\r\n  document.getElementById(\"ip6mac\").innerHTML=extractmac(ip6);\r\n}\r\n\r\nfunction joinUpIp6()\r\n{\r\n  var prf=parseInt(document.getElementById(\"ip6nprefix\").value);\r\n  document.getElementById(\"ip6fprefix\").value=prf;\r\n  var ip6n=parseIp6(document.getElementById(\"ip6net\").value);\r\n  var ip6h=parseIp6(document.getElementById(\"ip6host\").value);\r\n  document.getElementById(\"ip6full\").value=ip6toString(ip6merge(ip6n,ip6h,prf));\r\n  document.getElementById(\"ip6mac\").innerHTML=extractmac(ip6h);\r\n}\r\n\r\n\/\/ end of scripts\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\r\n-->\r\n<\/script>\r\n<!--\r\n\/\/hide the warning, JavaScript works...\r\ndocument.getElementById(\"warn\").style.display=\"none\";\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ generic functions\r\n\r\n\/\/convert hex to decimal\r\nfunction hex2dec(val)\r\n{\r\n  return parseInt(\"0x\"+val);\r\n}\r\n\r\nfunction dec2hex(val)\r\n{\r\n  var str=\"\";\r\n  var minus=false;\r\n  if(val<0){minus=true;val*=-1;}\r\n  val=Math.floor(val);\r\n  while(val>0){\r\n    var v=val%16;\r\n    val\/=16;val=Math.floor(val);\r\n    switch(v){\r\n      case 10:v=\"A\";break;\r\n      case 11:v=\"B\";break;\r\n      case 12:v=\"C\";break;\r\n      case 13:v=\"D\";break;\r\n      case 14:v=\"E\";break;\r\n      case 15:v=\"F\";break;\r\n    }\r\n    str=v + str;\r\n  }\r\n  if(str==\"\")str=\"0\";\r\n  if(minus)str=\"-\"+str;\r\n  return str;\r\n}\r\n\r\nfunction dec2hexlen(val,minlen)\r\n{\r\n  var str=dec2hex(val);\r\n  while(str.length<minlen)str=\"0\"+str;\r\n  return str;\r\n}\r\n\r\n\/\/generate a null ipv6 array\r\nfunction ip6null()\r\n{\r\n  var ar=new Array;\r\n  for(var i=0;i<8;i++)ar[i]=0;\r\n  return ar;\r\n}\r\n\r\n\/\/convert ipv6 string to array\r\nfunction parseIp6(str)\r\n{\r\n  \/\/init\r\n  var ar=new Array;\r\n  for(var i=0;i<8;i++)ar[i]=0;\r\n  \/\/check for trivial IPs\r\n  if(str==\"::\")return ar;\r\n  \/\/parse\r\n  var sar=str.split(':');\r\n  var slen=sar.length;\r\n  if(slen>8)slen=8;\r\n  var j=0;\r\n  for(var i=0;i<slen;i++){\r\n    \/\/this is a \"::\", switch to end-run mode\r\n    if(i && sar[i]==\"\"){j=9-slen+i;continue;}\r\n    ar[j]=parseInt(\"0x0\"+sar[i]);\r\n    j++;\r\n  }\r\n  \r\n  return ar;\r\n}\r\n\r\n\/\/convert ipv6 array to string\r\nfunction ip6toString(ar)\r\n{\r\n  \/\/init\r\n  var str=\"\";\r\n  \/\/find longest stretch of zeroes\r\n  var zs=-1,zsf=-1;\r\n  var zl=0,zlf=0;\r\n  var md=0;\r\n  for(var i=0;i<8;i++){\r\n    if(md){\r\n      if(ar[i]==0)zl++;\r\n      else md=0;\r\n    }else{\r\n      if(ar[i]==0){zs=i;zl=1;md=1;}\r\n    }\r\n    if(zl>2 && zl>zlf){zlf=zl;zsf=zs;}\r\n  }\r\n  \/\/print\r\n  for(var i=0;i<8;i++){\r\n    if(i==zsf){\r\n      str+=\":\";\r\n      i+=zlf-1;\r\n      if(i>=7)str+=\":\";\r\n      continue;\r\n    }\r\n    if(i)str+=\":\";\r\n    str+=dec2hex(ar[i]);\r\n  }\r\n\/\/   alert(\"printv6 str=\"+str+\" zsf=\"+zsf+\" zlf=\"+zlf);\r\n  return str;\r\n}\r\n\r\n\/\/create a mask from a prefix\r\nfunction ip6prefixToMask(prf)\r\n{\r\n  var ar=new Array;\r\n  for(var i=0;i<8;i++){\r\n    if(prf>=16)ar[i]=0xffff;\r\n    else switch(prf){\r\n      case 1:ar[i]=0x8000;break;\r\n      case 2:ar[i]=0xc000;break;\r\n      case 3:ar[i]=0xe000;break;\r\n      case 4:ar[i]=0xf000;break;\r\n      case 5:ar[i]=0xf800;break;\r\n      case 6:ar[i]=0xfc00;break;\r\n      case 7:ar[i]=0xfe00;break;\r\n      case 8:ar[i]=0xff00;break;\r\n      case 9:ar[i]=0xff80;break;\r\n      case 10:ar[i]=0xffc0;break;\r\n      case 11:ar[i]=0xffe0;break;\r\n      case 12:ar[i]=0xfff0;break;\r\n      case 13:ar[i]=0xfff8;break;\r\n      case 14:ar[i]=0xfffc;break;\r\n      case 15:ar[i]=0xfffe;break;\r\n      default:ar[i]=0;break;\r\n    }\r\n    prf-=16;\r\n  }\r\n  return ar;\r\n}\r\n\r\nfunction ip6mask(ip,prf)\r\n{\r\n  if(typeof(prf)==\"number\")prf=ip6prefixToMask(prf);\r\n  var ip2=new Array;\r\n  for(var i=0;i<8;i++)ip2[i] = ip[i] & prf[i];\r\n  return ip2;\r\n}\r\n\r\nfunction ip6maskHost(ip,prf)\r\n{\r\n  if(typeof(prf)==\"number\")prf=ip6prefixToMask(prf);\r\n  else prf=ip6copy(prf);\r\n  for(var i=0;i<8;i++)prf[i]=(~prf[i])&0xffff;\r\n  var ip2=new Array;\r\n  for(var i=0;i<8;i++)ip2[i] = ip[i] & prf[i];\r\n  return ip2;\r\n}\r\n\r\nfunction ip6copy(ip)\r\n{\r\n  var r=new Array;\r\n  for(var i=0;i<8;i++)r[i]=ip[i];\r\n  return r;\r\n}\r\n\r\nfunction ip6shiftleft(ip,left)\r\n{\r\n  if(left==0)return ip;\r\n  if(left<0)return ip6shiftright(ip,-left);\r\n  if(left>=128)return ip6null();\r\n  var legs=Math.floor(left\/16);\r\n  var bits=Math.floor(left&0xf);\r\n  var r=ip6null()\r\n  for(var i=0;(i+legs)<8;i++){\r\n    \/\/move by legs\r\n    r[i]=ip[i+legs];\r\n    \/\/move by bits\r\n    if(bits<=0)continue;\r\n    if(i)r[i-1]|=Math.floor(r[i]>>(16-bits));\r\n    r[i]<<=bits;\r\n    r[i]&=0xffff;\r\n  }\r\n  return r;\r\n}\r\n\r\nfunction ip6shiftright(ip,right)\r\n{\r\n  if(right==0)return ip;\r\n  if(right<0)return ip6shiftleft(ip,-right);\r\n  if(right>=128)return ip6null();\r\n  var legs=Math.floor(right\/16);\r\n  var bits=Math.floor(right&0xf);\r\n  var r=ip6null()\r\n  for(var i=7;i>=legs;i--){\r\n    \/\/move by legs\r\n    r[i]=ip[i-legs];\r\n    \/\/move by bits\r\n    if(bits<=0)continue;\r\n    if(i<=7)r[i+1]|=Math.floor(r[i]<<(16-bits))&0xffff;\r\n    r[i]>>=bits;\r\n    r[i]&=0xffff;\r\n  }\r\n  return r;\r\n}\r\n\r\nfunction ip6merge(net,host,prefix)\r\n{\r\n  net=ip6mask(net,prefix);\r\n  host=ip6maskHost(host,prefix);\r\n  for(var i=0;i<8;i++)net[i] |= host[i];\r\n  return net;\r\n}\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ hide and seek^W show\r\nfunction showIp4()\r\n{\r\n  document.getElementById(\"ip4show\").style.display=\"none\";\r\n  document.getElementById(\"ip4\").style.display=\"block\";\r\n}\r\nfunction hideIp4()\r\n{\r\n  document.getElementById(\"ip4show\").style.display=\"block\";\r\n  document.getElementById(\"ip4\").style.display=\"none\";\r\n}\r\n\r\nfunction showIp46()\r\n{\r\n  document.getElementById(\"ip46show\").style.display=\"none\";\r\n  document.getElementById(\"ip46\").style.display=\"block\";\r\n}\r\nfunction hideIp46()\r\n{\r\n  document.getElementById(\"ip46show\").style.display=\"block\";\r\n  document.getElementById(\"ip46\").style.display=\"none\";\r\n}\r\n\r\nfunction showIp6()\r\n{\r\n  document.getElementById(\"ip6show\").style.display=\"none\";\r\n  document.getElementById(\"ip6\").style.display=\"block\";\r\n}\r\nfunction hideIp6()\r\n{\r\n  document.getElementById(\"ip6show\").style.display=\"block\";\r\n  document.getElementById(\"ip6\").style.display=\"none\";\r\n}\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ IPv4 functions\r\n\r\n\/\/used by URLs to set IPv4 address from a specific example\r\nfunction setip4(addr,prefix)\r\n{\r\n  document.getElementById(\"ip4addr\").value=addr;\r\n  document.getElementById(\"ip4prefix\").value=prefix;\r\n  setIp4ByPrefix();\r\n  return false;\r\n}\r\n\r\n\/\/called if the address or prefix changes\r\nfunction setIp4ByPrefix()\r\n{\r\n  calcIp4Mask();\r\n  calcIp4Base();\r\n}\r\n\r\n\/\/called if the mask changes\r\nfunction setIp4ByMask()\r\n{\r\n  calcIp4Prefix();\r\n  calcIp4Base();\r\n}\r\n\r\nfunction calcIp4Mask()\r\n{\r\n  var prf=document.getElementById(\"ip4prefix\").value;\r\n  if(prf>32)prf=32;if(prf<1)prf=1;\r\n  var msk=\"\";\r\n  for(var i=0;i<4;i++){\r\n    if(i)msk+=\".\";\r\n    if(prf>8){\r\n      msk += \"255\";\r\n      prf-=8;\r\n      continue;\r\n    }\r\n    if(prf<=0){\r\n      msk += \"0\";\r\n      continue;\r\n    }\r\n    m=256-(1<<(8-prf));\r\n    msk+=m;\r\n    prf-=8;\r\n  }\r\n  document.getElementById(\"ip4mask\").value=msk;\r\n  document.getElementById(\"ip4mask\").style.color=\"black\";\r\n}\r\n\r\nfunction calcIp4Prefix()\r\n{\r\n  var msk=document.getElementById(\"ip4mask\").value.split(\".\");\r\n  document.getElementById(\"ip4mask\").style.color=\"black\";\r\n  var prf=0;\r\n  for(var i=0;i<4;i++){\r\n    switch(parseInt(msk[i])){\r\n      case 0:prf+=0;break;\r\n      case 128:prf+=1;break;\r\n      case 192:prf+=2;break;\r\n      case 224:prf+=3;break;\r\n      case 240:prf+=4;break;\r\n      case 248:prf+=5;break;\r\n      case 252:prf+=6;break;\r\n      case 254:prf+=7;break;\r\n      case 255:prf+=8;break;\r\n      default:document.getElementById(\"ip4mask\").style.color=\"red\";break;\r\n    }\r\n  }\r\n  document.getElementById(\"ip4prefix\").value=prf;\r\n}\r\n\r\nfunction calcIp4Base()\r\n{\r\n  var ip=document.getElementById(\"ip4addr\").value.split('.');\r\n  var msk=document.getElementById(\"ip4mask\").value.split('.');\r\n  var base=\"\";\r\n  var first=\"\",last=\"\",bcast=\"\",dgw=\"\";\r\n  for(var i=0;i<4;i++){\r\n    if(i){base+=\".\";first+=\".\";last+=\".\";dgw+=\".\";bcast+=\".\";}\r\n    b = parseInt(ip[i]) & parseInt(msk[i]);\r\n    base += \"\" + b;\r\n    l=b | (255-parseInt(msk[i]));\r\n    bcast+=l;\r\n    if(i<3){\r\n      first+=b;\r\n      last+=l;\r\n      dgw+=l;\r\n    }else{\r\n      first+=b+1;\r\n      last+=l-2;\r\n      dgw+=l-1;\r\n    }\r\n  }\r\n  document.getElementById(\"ip4base\").innerHTML=base;\r\n  var prf=parseInt(document.getElementById(\"ip4prefix\").value);\r\n  if(prf<=30){\r\n    document.getElementById(\"ip4first\").innerHTML=first;\r\n    document.getElementById(\"ip4last\").innerHTML=last;\r\n    document.getElementById(\"ip4bcast\").innerHTML=bcast;\r\n    document.getElementById(\"ip4gw\").innerHTML=dgw;\r\n  }else if(prf==31){\r\n    document.getElementById(\"ip4first\").innerHTML=base;\r\n    document.getElementById(\"ip4last\").innerHTML=bcast;\r\n    document.getElementById(\"ip4bcast\").innerHTML=\"n\/a\";\r\n    document.getElementById(\"ip4gw\").innerHTML=\"n\/a\";\r\n  }else{\r\n    document.getElementById(\"ip4first\").innerHTML=base;\r\n    document.getElementById(\"ip4last\").innerHTML=base;\r\n    document.getElementById(\"ip4bcast\").innerHTML=\"n\/a\";\r\n    document.getElementById(\"ip4gw\").innerHTML=\"n\/a\";\r\n  }\r\n}\r\n\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ IPv4 to IPv6 translation functions\r\n\r\nfunction teredocalc()\r\n{\r\n  var tip=parseIp6(document.getElementById(\"teredo\").value);\r\n  var prefix=ip6toString(ip6mask(tip,ip6prefixToMask(32)))+\"\/32\";\r\n  if(tip[0]!=0x2001 || tip[1]!=0)prefix+=\" not a Teredo address!\";\r\n  document.getElementById(\"teredo-prefix\").innerHTML=prefix;\r\n  var ip4 = (tip[2]>>8) + \".\" + (tip[2]&0xff) + \".\" + (tip[3]>>8) + \".\" + (tip[3]&0xff);\r\n  document.getElementById(\"teredo-server\").innerHTML=ip4;\r\n  ip4 = (tip[6]>>8^0xff) + \".\" + (tip[6]&0xff^0xff) + \".\" + (tip[7]>>8^0xff) + \".\" + (tip[7]&0xff^0xff);\r\n  document.getElementById(\"teredo-ip\").innerHTML    =ip4;\r\n  document.getElementById(\"teredo-port\").innerHTML  =tip[5]^0xffff;\r\n  var flags=\"\";\r\n  if(tip[4]&0x8000)flags=\"Cone NAT\";else flags=\"Non Cone NAT\";\r\n  flags+=\" (\"+tip[4]+\")\";\r\n  document.getElementById(\"teredo-flags\").innerHTML =flags;\r\n}\r\nteredocalc();\r\n\r\nfunction ip6fromip4(ip4str)\r\n{\r\n  var ip4=ip4str.split(\".\");\r\n  var ip6=ip6null();\r\n  ip6[6]=parseInt(ip4[0])<<8 | parseInt(ip4[1]);\r\n  ip6[7]=parseInt(ip4[2])<<8 | parseInt(ip4[3]);\r\n  return ip6;\r\n}\r\n\r\nfunction ipcnvfrom4()\r\n{\r\n  var ip6=ip6fromip4(document.getElementById(\"ipcnv4\").value);\r\n  document.getElementById(\"ipcnv6\").value=ip6toString(ip6);\r\n}\r\n\r\nfunction ipcnvfrom6()\r\n{\r\n  var ip6=parseIp6(document.getElementById(\"ipcnv6\").value);\r\n  var ip4=(ip6[6]>>8)+\".\"+(ip6[6]&0xff)+\".\"+(ip6[7]>>8)+\".\"+(ip6[7]&0xff);\r\n  document.getElementById(\"ipcnv4\").value=ip4;\r\n}\r\n\r\nfunction set6to4()\r\n{\r\n  document.getElementById(\"64net\").value=\"2002::\";\r\n  document.getElementById(\"64netprf\").value=\"16\";\r\n  conv64fromisp();\r\n}\r\n\r\nfunction conv64fromisp()\r\n{\r\n  var pprf=parseInt(document.getElementById(\"64netprf\").value);\r\n  var ip6=ip6mask(parseIp6(document.getElementById(\"64net\").value),pprf);\r\n  \/\/convert ip4 to ip6\r\n  var ip4=document.getElementById(\"64ip4\").value;\r\n  var ip4bits=parseInt(document.getElementById(\"64ip4bits\").value);\r\n  if(ip4bits>32)ip4bits=32;\r\n  if(ip4bits<1)ip4bits=1;\r\n  var part=ip6shiftleft(ip6fromip4(ip4),128-ip4bits);\r\n  part=ip6shiftright(part,pprf);\r\n  document.getElementById(\"64ip6\").value=ip6toString(ip6merge(ip6,part,pprf));\r\n  document.getElementById(\"64ip6len\").value=ip4bits+pprf;\r\n}\r\n\r\nfunction conv64toisp()\r\n{\r\n  var ip6=parseIp6(document.getElementById(\"64ip6\").value);\r\n  var ip6prf=parseInt(document.getElementById(\"64ip6len\").value);\r\n  var pprf=parseInt(document.getElementById(\"64netprf\").value);\r\n  document.getElementById(\"64net\").value=ip6toString(ip6mask(ip6,pprf));\r\n  ip6=ip6shiftright(ip6maskHost(ip6,pprf),128-ip6prf);\r\n  var ip4=(ip6[6]>>8)+\".\"+(ip6[6]&0xff)+\".\"+(ip6[7]>>8)+\".\"+(ip6[7]&0xff);\r\n  document.getElementById(\"64ip4\").value=ip4;\r\n  var ip4len=ip6prf-pprf;\r\n  if(ip4len>32)ip4len=32;\r\n  document.getElementById(\"64ip4bits\").value=ip4len;\r\n}\r\n\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ IPv6 functions\r\n\r\nfunction mactoeui()\r\n{\r\n  var mac=document.getElementById(\"mac48\").value.replace(\/:\/g,\"-\").split(\"-\");\r\n  if(mac.length!=6){\r\n    alert(\"Not a MAC address.\");\r\n    return;\r\n  }\r\n  var ip6=ip6null();\r\n  ip6[4]=hex2dec(mac[0])<<8 | hex2dec(mac[1]);\r\n  ip6[4] ^= 0x200;\r\n  ip6[5]=hex2dec(mac[2])<<8 | 0xff;\r\n  ip6[6]=hex2dec(mac[3]) | 0xfe00;\r\n  ip6[7]=hex2dec(mac[4])<<8 | hex2dec(mac[5]);\r\n  document.getElementById(\"eui64\").value=ip6toString(ip6);\r\n}\r\n\r\nfunction extractmac(ip6)\r\n{\r\n  if((ip6[5]&0xff)!=0xff || (ip6[6]>>8)!=0xfe)return \"(no MAC)\";\r\n  var mac=dec2hexlen((ip6[4]>>8)^2,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[4]&0xff,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[5]>>8,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[6]&0xff,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[7]>>8,2)+\"-\";\r\n  mac+=dec2hexlen(ip6[7]&0xff,2);\r\n  return mac;\r\n}\r\n\r\nfunction euitomac()\r\n{\r\n  document.getElementById(\"mac48\").value=extractmac(parseIp6(document.getElementById(\"eui64\").value));\r\n}\r\n\r\nfunction splitUpIp6()\r\n{\r\n  var ip6=parseIp6(document.getElementById(\"ip6full\").value);\r\n  var prf=parseInt(document.getElementById(\"ip6fprefix\").value);\r\n  document.getElementById(\"ip6nprefix\").value=prf;\r\n  document.getElementById(\"ip6net\").value=ip6toString(ip6mask(ip6,prf));\r\n  document.getElementById(\"ip6host\").value=ip6toString(ip6maskHost(ip6,prf));\r\n  document.getElementById(\"ip6mac\").innerHTML=extractmac(ip6);\r\n}\r\n\r\nfunction joinUpIp6()\r\n{\r\n  var prf=parseInt(document.getElementById(\"ip6nprefix\").value);\r\n  document.getElementById(\"ip6fprefix\").value=prf;\r\n  var ip6n=parseIp6(document.getElementById(\"ip6net\").value);\r\n  var ip6h=parseIp6(document.getElementById(\"ip6host\").value);\r\n  document.getElementById(\"ip6full\").value=ip6toString(ip6merge(ip6n,ip6h,prf));\r\n  document.getElementById(\"ip6mac\").innerHTML=extractmac(ip6h);\r\n}\r\n\r\n\/\/ end of scripts\r\n\/\/ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\r\n-->\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is a handy tool that can help you convert your IPv4 addresses to IPv6. To use it, simply enter the IPv4 address in the text field below and click on the &#8220;Convert&#8221; button. The tool will then display the converted IPv6 address below. IPv4 Address: Please use dotted decimal notation. IPv6 Address: Please use hexadecimal notation with the relevant 32 bits to the far right.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/pages\/5969"}],"collection":[{"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/comments?post=5969"}],"version-history":[{"count":5,"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/pages\/5969\/revisions"}],"predecessor-version":[{"id":5975,"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/pages\/5969\/revisions\/5975"}],"wp:attachment":[{"href":"https:\/\/www.practicallynetworked.com\/wp-json\/wp\/v2\/media?parent=5969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}