public void SendWpadFile(Packet packet)
{
lock (locker)
{
if (packet is EthernetPacket)
{
EthernetPacket ethPacket = packet as EthernetPacket;
IPv6Packet ipv6Source = (IPv6Packet)packet.PayloadPacket;
if (ipv6Source.PayloadPacket is PacketDotNet.TcpPacket)
{
TcpPacket tcp = ipv6Source.PayloadPacket as TcpPacket;
string element = string.Format("{0}/{1}", tcp.SequenceNumber, tcp.AcknowledgmentNumber);
ushort destPort = tcp.SourcePort;
ushort sourcePort = tcp.DestinationPort;
IPAddress destAddress = ipv6Source.SourceAddress;
IPAddress sourceAddress = ipv6Source.DestinationAddress;
PhysicalAddress sourceMac = Program.CurrentProject.data.GetDevice().MacAddress;
PhysicalAddress destMac = ethPacket.SourceHwAddress;
tcp.SourcePort = sourcePort;
tcp.DestinationPort = destPort;
if (tcp.Syn && !tcp.Ack && !tcp.Rst && tcp.PayloadData.Length == 0 && sourcePort == 80)
{
tcp.Ack = true;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = tcp.SequenceNumber + 38;
tcp.WindowSize = 14600;
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
else if (!tcp.Syn && tcp.Ack && tcp.PayloadData != null && !tcp.Rst && tcp.PayloadData.Length > 0 && sourcePort == 80)
{
if (Data.Data.WpadReqList.Contains(element))
return;
Data.Data.WpadReqList.Add(element);
HttpPacket http = new HttpPacket(((TcpPacket)(packet.PayloadPacket.PayloadPacket)).PayloadData);
if (http.FullUrlRequest.Contains("wpad.dat"))
{
tcp.Psh = true;
tcp.Fin = true;
tcp.Ack = true;
tcp.SequenceNumber = (ipv6Source.PayloadPacket as TcpPacket).AcknowledgmentNumber;
tcp.AcknowledgmentNumber = tcp.SequenceNumber;
string jsFunction = string.Format("function FindProxyForURL(url, host){{return \"PROXY [{0}]:{1}\";}}", ipv6Source.DestinationAddress.ToString(), proxyPort);
string htmlHeader = string.Format("HTTP/1.1 200 OK\r\nContent-Type: application/x-ns-proxy-autoconfig\r\nContent-Length: {0}\r\n\r\n", jsFunction.Length);
tcp.PayloadData = System.Text.Encoding.UTF8.GetBytes(string.Concat(htmlHeader, jsFunction));
EthernetPacket eth = new EthernetPacket(ethPacket.DestinationHwAddress, ethPacket.SourceHwAddress, EthernetPacketType.IpV6);
IPv6Packet ip6 = new IPv6Packet(ipv6Source.DestinationAddress, ipv6Source.SourceAddress);
ip6.PayloadPacket = tcp;
eth.PayloadPacket = ip6;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
else if (tcp.Fin && tcp.Ack && !tcp.Rst && tcp.PayloadData.Length == 0)
{
tcp.Ack = true;
tcp.Fin = false;
uint ackOrg = tcp.AcknowledgmentNumber;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = ackOrg;
tcp.WindowSize = 1400;
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
}
}
}
private void Ipv6ToIpv4(EthernetPacket orgPacket)
{
try
{
IPv6Packet ipv6 = (IPv6Packet)orgPacket.PayloadPacket;
if (ipv6.PayloadPacket is PacketDotNet.ICMPv6Packet)
{
ICMPv6Packet icmp = ipv6.PayloadPacket as ICMPv6Packet;
icmp.Type = ICMPv6Types.EchoReply;
icmp.UpdateCalculatedValues();
icmp.Checksum = (ushort)ChecksumUtils.OnesComplementSum(icmp.Bytes);
IPv6Packet ipv6Ack = new IPv6Packet(ipv6.DestinationAddress, ipv6.SourceAddress);
ipv6Ack.PayloadPacket = icmp;
EthernetPacket eth = new EthernetPacket(orgPacket.DestinationHwAddress, orgPacket.SourceHwAddress, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
Program.CurrentProject.data.SendPacket(eth);
}
else if (ipv6.PayloadPacket is PacketDotNet.TcpPacket)
{
TcpPacket tcp = ipv6.PayloadPacket as TcpPacket;
ushort destPort = tcp.SourcePort;
ushort sourcePort = tcp.DestinationPort;
IPAddress destAddress = ipv6.SourceAddress;
IPAddress sourceAddress = ipv6.DestinationAddress;
PhysicalAddress sourceMac = device.MacAddress;
PhysicalAddress destMac = orgPacket.SourceHwAddress;
tcp.SourcePort = sourcePort;
tcp.DestinationPort = destPort;
if (tcp.Syn && !tcp.Ack && !tcp.Rst && tcp.PayloadData.Length == 0)
{
if (sourcePort == 80)
{
tcp.Ack = true;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = tcp.SequenceNumber + 38;
tcp.WindowSize = 14600;
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
else if (sourcePort == 443)
{
tcp.Syn = false;
tcp.Ack = true;
tcp.Rst = true;
tcp.Psh = false;
uint ackOrg = tcp.AcknowledgmentNumber;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = 0;
tcp.WindowSize = 0;
tcp.PayloadData = new byte[0];
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
else if (!tcp.Syn && tcp.Ack && tcp.PayloadData != null && !tcp.Rst && tcp.PayloadData.Length > 0 && sourcePort == 80)
{
string element = string.Format("{0}/{1}", tcp.SequenceNumber, tcp.AcknowledgmentNumber);
if (!Data.Data.SlaacReqList.Contains(element))
{
Data.Data.SlaacReqList.Add(element);
HttpPacket httpReq = new HttpPacket(tcp.PayloadData);
if (httpReq.IsCompleted)
{
SendHttpResponse(httpReq, orgPacket, tcp.SourcePort, tcp.DestinationPort, tcp.AcknowledgmentNumber, tcp.SequenceNumber + (uint)tcp.PayloadData.Length);
}
else
{
lock (htppLock)
{
//incomplete packet
TcpReconstructorPacket previousPacket = (from p in Program.CurrentProject.data.ReconstructedPackets
where p.ExpectedSequenceNumber == tcp.SequenceNumber
select p).FirstOrDefault();
TcpReconstructorPacket nextPacket = (from p in Program.CurrentProject.data.ReconstructedPackets
where p.FirstSequenceNumber == tcp.SequenceNumber + tcp.PayloadData.Length
select p).FirstOrDefault();
if (nextPacket != null || previousPacket != null)
{
bool packetSend = false;
if (nextPacket != null)
{
nextPacket.InsertPreviousTcpPacket(tcp);
httpReq = new HttpPacket(nextPacket.Data);
if (httpReq.IsCompleted)
{
packetSend = true;
Program.CurrentProject.data.ReconstructedPackets.Remove(nextPacket);
SendHttpResponse(httpReq, orgPacket, tcp.SourcePort, tcp.DestinationPort, tcp.AcknowledgmentNumber, nextPacket.ExpectedSequenceNumber);
}
}
if (previousPacket != null && !packetSend)
{
if (nextPacket != null)
{
previousPacket.AppendTcpPacket(nextPacket);
Program.CurrentProject.data.ReconstructedPackets.Remove(nextPacket);
}
else
previousPacket.AppendTcpPacket(tcp);
httpReq = new HttpPacket(previousPacket.Data);
if (httpReq.IsCompleted)
{
Program.CurrentProject.data.ReconstructedPackets.Remove(previousPacket);
SendHttpResponse(httpReq, orgPacket, tcp.SourcePort, tcp.DestinationPort, tcp.AcknowledgmentNumber, previousPacket.ExpectedSequenceNumber);
}
}
}
else
{
Program.CurrentProject.data.ReconstructedPackets.Add(new TcpReconstructorPacket(tcp));
}
var toDelete = Program.CurrentProject.data.ReconstructedPackets.Where(p => DateTime.Now.Subtract(p.CreationTime).TotalMinutes > 2);
foreach (var item in toDelete)
{
Program.CurrentProject.data.ReconstructedPackets.Remove(item);
}
}
}
}
}
else if (tcp.Fin && tcp.Ack && !tcp.Rst && tcp.PayloadData.Length == 0)
{
tcp.Ack = true;
tcp.Fin = false;
uint ackOrg = tcp.AcknowledgmentNumber;
tcp.AcknowledgmentNumber = tcp.SequenceNumber + 1;
tcp.SequenceNumber = ackOrg;
tcp.WindowSize = 1400;
IPv6Packet ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
EthernetPacket eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
}
catch
{
}
}
private void SendHttpResponse(HttpPacket httpReq, EthernetPacket orgEthPacket, ushort sourcePort, ushort destinationPort, uint ackNumber, uint expectedSeqNumber)
{
IPv6Packet ipv6 = (IPv6Packet)orgEthPacket.PayloadPacket;
TcpPacket tcp = new TcpPacket(sourcePort, destinationPort);
IPAddress destAddress = ipv6.SourceAddress;
IPAddress sourceAddress = ipv6.DestinationAddress;
PhysicalAddress sourceMac = device.MacAddress;
PhysicalAddress destMac = orgEthPacket.SourceHwAddress;
string urlRequest = string.IsNullOrEmpty(httpReq.Host) ? string.Format("http://{0}{1}", Ipv6To4Addr(ipv6.DestinationAddress.ToString()), httpReq.ResourceRequest) : httpReq.FullUrlRequest;
bool validRequest = false;
HttpWebRequest req = null;
HttpWebResponse response = null;
IPv6Packet ipv6Ack = null;
EthernetPacket eth = null;
CookieContainer lastCookies = httpReq.Cookies;
string userAgent = httpReq.UserAgent;
int repeatRedirect = 0;
//Fix no Google's javascript redirect
if (httpReq.Host.Contains("google") && httpReq.FullUrlRequest.Contains("/xjs/_/js/"))
validRequest = true;
while (!validRequest)
{
req = HttpWebRequest.Create(urlRequest) as HttpWebRequest;
req.Host = req.Address.Host;
req.UserAgent = userAgent;
req.Method = httpReq.Method;
//req.Accept = httpReq.Accept;
req.Headers[HttpRequestHeader.AcceptLanguage] = httpReq.AcceptLanguage;
req.Referer = httpReq.Referer;
req.AllowAutoRedirect = false;
if (lastCookies == null)
lastCookies = new CookieContainer();
req.CookieContainer = lastCookies;
if (httpReq.Method.ToLower() == "post" && httpReq.Data != null)
{
req.ContentType = httpReq.ContentType;
req.ContentLength = httpReq.Data.Length;
using (Stream dataStream = req.GetRequestStream())
{
using (BinaryWriter writer = new BinaryWriter(dataStream))
{
writer.Write(httpReq.Data);
}
}
}
try
{
response = req.GetResponse() as HttpWebResponse;
if ((response.StatusCode == HttpStatusCode.Found || response.StatusCode == HttpStatusCode.Moved) && response.Headers[HttpResponseHeader.Location].StartsWith("https"))
throw new WebException("302", null, WebExceptionStatus.UnknownError, response);
else
validRequest = true;
}
catch (WebException ex404)
{
if (ex404.Message.Contains("404") && ex404.Response != null)
{
if ((ex404.Response as HttpWebResponse) != null)
response = (ex404.Response as HttpWebResponse);
validRequest = true;
}
else if (ex404.Message.Contains("403") && ex404.Response.ResponseUri.AbsoluteUri.StartsWith("http:"))
{
validRequest = false;
urlRequest = string.Format("https{0}", ex404.Response.ResponseUri.AbsoluteUri.Substring(4));
if (!string.IsNullOrEmpty(ex404.Response.Headers[HttpResponseHeader.SetCookie]))
{
CookieCollection col = HttpPacket.ParseSetCookies(ex404.Response.Headers[HttpResponseHeader.SetCookie]);
if (col.Count > 0)
{
if (!string.IsNullOrEmpty(col[0].Domain))
{
string domain = col[0].Domain;
if (domain.StartsWith("."))
domain = domain.Remove(0, 1);
lastCookies.Add(new Uri(string.Format("http://{0}", domain)), col);
}
else
lastCookies.Add(ex404.Response.ResponseUri, col);
}
}
}
else if (ex404.Message.Contains("302"))
{
if (repeatRedirect < REDIRECTCOUNT)
{
validRequest = false;
urlRequest = ex404.Response.Headers[HttpResponseHeader.Location];
if (!string.IsNullOrEmpty(ex404.Response.Headers[HttpResponseHeader.SetCookie]))
{
CookieCollection col = HttpPacket.ParseSetCookies(ex404.Response.Headers[HttpResponseHeader.SetCookie]);
if (col.Count > 0)
{
if (!string.IsNullOrEmpty(col[0].Domain))
{
string domain = col[0].Domain;
if (domain.StartsWith("."))
domain = domain.Remove(0, 1);
if (urlRequest.StartsWith("https"))
lastCookies.Add(new Uri(string.Format("https://{0}", domain)), col);
else
lastCookies.Add(new Uri(string.Format("http://{0}", domain)), col);
}
else
lastCookies.Add(ex404.Response.ResponseUri, col);
}
}
repeatRedirect++;
}
else
{
validRequest = true;
response = null;
}
}
else
{
validRequest = true;
}
}
catch (Exception)
{
}
}
int previousLength = 0;
uint ackValue = expectedSeqNumber;
uint sequence = ackNumber;
if (response != null)
{
try
{
foreach (var item in response.GetBytes(1300))
{
tcp.Psh = false;
tcp.Fin = false;
tcp.Ack = true;
tcp.AcknowledgmentNumber = ackValue;
tcp.SequenceNumber = sequence + (uint)previousLength;
sequence = tcp.SequenceNumber;
previousLength = item.Length;
tcp.WindowSize = 1600;
tcp.PayloadData = item;
ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
catch (Exception e)
{
e.ToString();
}
tcp.Psh = true;
tcp.Fin = true;
tcp.Ack = true;
tcp.AcknowledgmentNumber = ackValue;
tcp.SequenceNumber = sequence + (uint)previousLength;
tcp.WindowSize = 1600;
tcp.PayloadData = new byte[0];
ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
else
{
tcp.Psh = true;
tcp.Fin = true;
tcp.Ack = true;
tcp.AcknowledgmentNumber = ackValue;
tcp.SequenceNumber = sequence + (uint)previousLength;
tcp.WindowSize = 1600;
tcp.PayloadData = HttpPacket.Get404Packet();
ipv6Ack = new IPv6Packet(sourceAddress, destAddress);
ipv6Ack.PayloadPacket = tcp;
eth = new EthernetPacket(sourceMac, destMac, EthernetPacketType.IpV6);
eth.PayloadPacket = ipv6Ack;
(eth.PayloadPacket.PayloadPacket as TcpPacket).UpdateTCPChecksum();
Program.CurrentProject.data.SendPacket(eth);
}
}
public static IEnumerable <byte[]> GetBytes(this HttpWebResponse response, int maxLength)
{
using (MemoryStream ms = new MemoryStream())
{
using (BinaryWriter writer = new BinaryWriter(ms))
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("HTTP/{0} {1} {2} \r\n", response.ProtocolVersion, (int)response.StatusCode, response.StatusDescription)));
if (response.Headers[HttpResponseHeader.Location] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Location: {0}\r\n", response.Headers[HttpResponseHeader.Location].Replace("https", "http"))));
}
if (response.Headers[HttpResponseHeader.ContentType] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Content-Type: {0}\r\n", response.Headers[HttpResponseHeader.ContentType])));
}
if (response.Headers[HttpResponseHeader.Connection] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Connection: {0}\r\n", response.Headers[HttpResponseHeader.Connection])));
}
else if (response.Headers[HttpResponseHeader.KeepAlive] != null)
{
response.Headers[HttpResponseHeader.KeepAlive].ToString();
}
if (response.Headers[HttpResponseHeader.Date] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Date: {0}\r\n", response.Headers[HttpResponseHeader.Date])));
}
if (response.Headers[HttpResponseHeader.Allow] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Allow: {0}\r\n", response.Headers[HttpResponseHeader.Allow])));
}
if (response.Headers[HttpResponseHeader.CacheControl] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Cache-Control: {0}\r\n", response.Headers[HttpResponseHeader.CacheControl])));
}
if (response.Headers["P3P"] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("P3P: {0}\r\n", response.Headers["P3P"])));
}
if (response.Headers[HttpResponseHeader.Vary] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Vary: {0}\r\n", response.Headers[HttpResponseHeader.Vary])));
}
if (response.Headers[HttpResponseHeader.Expires] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Expires: {0}\r\n", response.Headers[HttpResponseHeader.Expires])));
}
if (response.Headers[HttpResponseHeader.Server] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Server: {0}\r\n", response.Headers[HttpResponseHeader.Server])));
}
if (response.Headers[HttpResponseHeader.ContentEncoding] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Content-Encoding: {0}\r\n", response.Headers[HttpResponseHeader.ContentEncoding])));
}
if (response.Headers[HttpResponseHeader.ContentLanguage] != null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(string.Format("Content-Language: {0}\r\n", response.Headers[HttpResponseHeader.ContentLanguage])));
}
if (response.Headers[HttpResponseHeader.TransferEncoding] != null && response.Headers[HttpResponseHeader.TransferEncoding].Contains("chunked") && response.Headers[HttpResponseHeader.Connection] == null)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes("Connection: close\r\n"));
}
if (response.Headers[HttpResponseHeader.SetCookie] != null)
{
CookieCollection cookieCol = HttpPacket.ParseSetCookies(response.Headers[HttpResponseHeader.SetCookie]);
foreach (Cookie item in cookieCol)
{
writer.Write(System.Text.Encoding.ASCII.GetBytes(HttpPacket.CookieToSetCookieHeader(item)));
}
}
writer.Write(System.Text.Encoding.ASCII.GetBytes("\r\n"));
}
using (MemoryStream headerStream = new MemoryStream(ms.ToArray()))
{
using (BinaryReader reader = new BinaryReader(headerStream))
{
while (reader.BaseStream.Position < reader.BaseStream.Length)
{
yield return(reader.ReadBytes(maxLength));
}
}
}
}
using (BinaryReader reader = new BinaryReader(response.GetResponseStream()))
{
int bytesRead;
byte[] buffer = new byte[maxLength];
Encoding responseEncoding = null;
while ((bytesRead = reader.Read(buffer, 0, buffer.Length)) > 0)
{
Array.Resize(ref buffer, bytesRead);
if (response.ContentType.ToLower().Contains("html") || response.ContentType.ToLower().Contains("javascript") || response.ContentType.ToLower().Contains("json"))
{
if (responseEncoding == null)
{
responseEncoding = GetResponseEncoding(response.CharacterSet);
}
string htmlContent = responseEncoding.GetString(buffer);
htmlContent = htmlContent.Replace("https", "http").Replace("Https", "http");
byte[] htmlBytes = responseEncoding.GetBytes(htmlContent);
yield return(htmlBytes);
}
else
{
yield return(buffer);
}
buffer = new byte[maxLength];
}
}
}
