public static string ToString(Ieee802Dot11Packet ieee801Dot11)
{
string result = "Protocol IEEE 802.11 parser\n";
result += $"Encapsulated packet length {ieee801Dot11.packet.Length} bytes; {BitConverter.ToString(ieee801Dot11.packet)}\n";
result += $"\tFrameControl: {ieee801Dot11.frame_control}\n";
result += $"\tDuration: {ieee801Dot11.duration}\n";
result += $"\tAddress1: {BitConverter.ToString(ieee801Dot11.address1)}\n";
result += $"\tAddress2: {BitConverter.ToString(ieee801Dot11.address2)}\n";
result += $"\tAddress3: {BitConverter.ToString(ieee801Dot11.address3)}\n";
result += $"\tSequenceControl: {ieee801Dot11.sequence_control}\n";
if (ieee801Dot11.address4 != null)
{
result += $"\tAddress4: {BitConverter.ToString(ieee801Dot11.address4)}\n";
}
if (ieee801Dot11.frame_body != null)
{
result += $"\tFrameBody: {BitConverter.ToString(ieee801Dot11.frame_body)}\n";
}
if (ieee801Dot11.frame_body != null)
{
result += $"\tFCS: {ieee801Dot11.fcs}\n";
}
result += "\n";
return(result);
}
public static Ieee802Dot11Packet Parse(byte[] packet)
{
if (packet.Length < 24)
{
throw new Exception("/Its no IEEE 802.11 packet/");
}
var result = new Ieee802Dot11Packet
{
packet = packet,
frame_control = GetFrameControl(packet),
duration = GetDuration(packet),
address1 = GetAddress(packet, 4),
address2 = GetAddress(packet, 10),
address3 = GetAddress(packet, 16),
sequence_control = GetSequenceControl(packet),
address4 = GetAddress(packet, 24),
frame_body = GetFrameBody(packet),
fcs = GetFcs(packet)
};
if (GetVersion(result) != "0")
{
throw new Exception("/Its no IEEE 802.11 packet/");
}
return(result);
}
public static string FrameControlToString(Ieee802Dot11Packet ieee801Dot11)
{
string result = $"\tFramecontrol: Version: {GetVersion(ieee801Dot11)}; Type: {GetType(ieee801Dot11)}; Subtype: {GetSubtype(ieee801Dot11)}; ToDS: {GetToDs(ieee801Dot11).ToString()}; FromDS: {GetFromDs(ieee801Dot11).ToString()};\n";
result += $"\tAddress1: {BitConverter.ToString(ieee801Dot11.address1)}; Address2: {BitConverter.ToString(ieee801Dot11.address2)}; Address3: {BitConverter.ToString(ieee801Dot11.address3)};\n";
result += "\n";
return(result);
}
private static string GetGadgetAddress(Ieee802Dot11Packet ieee801Dot11)
{
if (GetType(ieee801Dot11) == "Managament" && (GetSubtype(ieee801Dot11) == "Probe request" || GetSubtype(ieee801Dot11) == "Association request"))
{
return(BitConverter.ToString(ieee801Dot11.address2).Replace("-", ":"));
}
return(null);
}
public static string GetTransmitterAddress(Ieee802Dot11Packet ieee801Dot11)
{
bool fromDs = GetFromDs(ieee801Dot11);
bool toDs = GetToDs(ieee801Dot11);
if (toDs && fromDs)
{
return(BitConverter.ToString(ieee801Dot11.address2).Replace("-", ":"));
}
return(null);
}
public static string GetDestinationAddress(Ieee802Dot11Packet ieee801Dot11)
{
bool fromDs = GetFromDs(ieee801Dot11);
bool toDs = GetToDs(ieee801Dot11);
if ((!toDs && !fromDs) || (!toDs))
{
return(BitConverter.ToString(ieee801Dot11.address1).Replace("-", ":"));
}
return(BitConverter.ToString(ieee801Dot11.address3).Replace("-", ":"));
}
// Parse FrameControl
public static string FrameControlBreifToString(Ieee802Dot11Packet ieee801Dot11)
{
string result = $"\tType: {GetType(ieee801Dot11)}; Subtype: {GetSubtype(ieee801Dot11)}; ToDS: {GetToDs(ieee801Dot11).ToString()}; FromDS: {GetFromDs(ieee801Dot11).ToString()};\n";
result += $"\tAddress1: {BitConverter.ToString(ieee801Dot11.address1)}; Address2: {BitConverter.ToString(ieee801Dot11.address2)}; Address3: {BitConverter.ToString(ieee801Dot11.address3)};";
if (ieee801Dot11.address4 != null)
{
result += $" Address4: {BitConverter.ToString(ieee801Dot11.address4)}";
}
result += "\n";
result += "\n";
return(result);
}
public static string GetType(Ieee802Dot11Packet ieee801Dot11)
{
var type = (ieee801Dot11.frame_control & 0x000c) >> 2;
switch (type)
{
case 0: return("Managament");
case 1: return("Control");
case 2: return("Data");
default: return("Reserved");
}
}
public static string GetBssidAddress(Ieee802Dot11Packet ieee801Dot11)
{
bool fromDs = GetFromDs(ieee801Dot11);
bool toDs = GetToDs(ieee801Dot11);
if (!toDs && !fromDs)
{
return(BitConverter.ToString(ieee801Dot11.address3).Replace("-", ":"));
}
if (!toDs)
{
return(BitConverter.ToString(ieee801Dot11.address2).Replace("-", ":"));
}
if (!fromDs)
{
return(BitConverter.ToString(ieee801Dot11.address1).Replace("-", ":"));
}
return(null);
}
public static bool IsData(Ieee802Dot11Packet ieee801Dot11)
{
return(GetType(ieee801Dot11) == "Data" && GetSubtype(ieee801Dot11) != "Reserved");
}
public static bool IsControl(Ieee802Dot11Packet ieee801Dot11)
{
return(GetType(ieee801Dot11) == "Control" && GetSubtype(ieee801Dot11) != "Reserved");
}
public static bool IsManagament(Ieee802Dot11Packet ieee801Dot11)
{
return(GetType(ieee801Dot11) == "Managament" && GetSubtype(ieee801Dot11) != "Reserved");
}
public static bool GetFromDs(Ieee802Dot11Packet ieee801Dot11)
{
return((ieee801Dot11.frame_control & 0x0200) > 0);
}
public static string GetSubtype(Ieee802Dot11Packet ieee801Dot11)
{
var type = (ieee801Dot11.frame_control & 0x000c) >> 2;
var subtype = (ieee801Dot11.frame_control & 0x00f0) >> 4;
switch (type)
{
case 0:
switch (subtype)
{
case 0: return("Association request");
case 1: return("Association response");
case 2: return("Reassociation request");
case 3: return("Association response");
case 4: return("Probe request");
case 5: return("Probe response");
case 8: return("Beacon");
case 9: return("ATIM");
case 10: return("Diassociation");
case 11: return("Authentification");
case 12: return("Deauthentification");
default: return("Reserved");
}
case 1:
switch (subtype)
{
case 10: return("Power save");
case 11: return("Request to send");
case 12: return("Clear to send");
case 13: return("Acknowledgment");
case 15: return("CF-End + CF-Ack");
default: return("Reserved");
}
case 2:
switch (subtype)
{
case 0: return("Data");
case 1: return("Data + CF-Ack");
case 2: return("Data + CF-Pull");
case 3: return("Data + CF-Ack + CF-Pull");
case 4: return("No data");
case 5: return("CF-Ack (no data)");
case 6: return("CF-Pull (no data)");
case 7: return("CF-Ack + CF-Pull (no data)");
default: return("Reserved");
}
default: return("Reserved");
}
}
public static string GetVersion(Ieee802Dot11Packet ieee801Dot11)
{
var version = ieee801Dot11.frame_control & 0x0003;
return(version.ToString());
}
