public static void req_decode(ref Request request, byte[] data, bool header_only = false)
{
/* header fields*/
int counter = 0;
byte[] htype = new byte[sizeof(int)];
Array.Copy(data, counter, htype, 0, sizeof(int));
request.header.req_type = (reqType)BitConverter.ToInt32(htype, 0);
counter += sizeof(int);
byte[] hsize = new byte[sizeof(ulong)];
Array.Copy(data, counter, hsize, 0, sizeof(ulong));
request.header.size = BitConverter.ToUInt64(hsize, 0);
counter += sizeof(ulong);
byte[] hkey = new byte[HEADER_KEY_LENGTH];
Array.Copy(data, counter, hkey, 0, HEADER_KEY_LENGTH);
request.header.key = System.Text.Encoding.UTF8.GetString(hkey);
counter += HEADER_KEY_LENGTH;
if (header_only == true)
{
return;
}
/* data fields */
if (request.header.req_type == reqType.req_cnt)
{
RData_Connect dt = new RData_Connect();
byte[] rtype = new byte[sizeof(int)];
Array.Copy(data, counter, rtype, 0, sizeof(int));
dt.conn_type = (connType)BitConverter.ToUInt32(rtype, 0);
counter += sizeof(int);
byte[] rname = new byte[NICKNAME_LENGTH];
Array.Copy(data, counter, rname, 0, NICKNAME_LENGTH);
dt.name = System.Text.Encoding.UTF8.GetString(rname);
counter += NICKNAME_LENGTH;
byte[] rpsswd = new byte[PASSWORD_LENGTH];
Array.Copy(data, counter, rpsswd, 0, PASSWORD_LENGTH);
dt.password = System.Text.Encoding.UTF8.GetString(rpsswd);
counter += PASSWORD_LENGTH;
request.data = Marshal.AllocHGlobal(Marshal.SizeOf(dt));
Marshal.StructureToPtr(dt, request.data, false);
}
else if (request.header.req_type == reqType.req_snd)
{
RData_File dt = new RData_File();
byte[] rid = new byte[sizeof(int)];
Array.Copy(data, counter, rid, 0, sizeof(int));
dt.id = BitConverter.ToInt32(rid, 0);
counter += sizeof(int);
byte[] rtype = new byte[sizeof(int)];
Array.Copy(data, counter, rtype, 0, sizeof(int));
dt.file_type = (fileType)BitConverter.ToInt32(rid, 0);
counter += sizeof(int);
byte[] rsize = new byte[sizeof(ulong)];
Array.Copy(data, counter, rsize, 0, sizeof(ulong));
dt.size = BitConverter.ToUInt64(rsize, 0);
counter += sizeof(ulong);
byte[] rdata = new byte[dt.size];
Array.Copy(data, counter, rdata, 0, (int)dt.size);
dt.data = System.Text.Encoding.UTF8.GetString(rdata);
counter += (int)dt.size;
request.data = Marshal.AllocHGlobal(Marshal.SizeOf(dt));
Marshal.StructureToPtr(dt, request.data, false);
}
else if (request.header.req_type == reqType.req_res)
{
RData_Response dt;
byte[] rtype = new byte[sizeof(int)];
Array.Copy(data, counter, rtype, 0, sizeof(int));
dt.res_type = (resType)BitConverter.ToInt32(rtype, 0);
counter += sizeof(int);
byte[] rid = new byte[sizeof(int)];
Array.Copy(data, counter, rid, 0, sizeof(int));
dt.id = BitConverter.ToInt32(rid, 0);
counter += sizeof(int);
request.data = Marshal.AllocHGlobal(Marshal.SizeOf(dt));
Marshal.StructureToPtr(dt, request.data, false);
}
}
public static byte[] req_encode(ref Request request)
{
/* encode header */
byte[] htype = BitConverter.GetBytes((int)request.header.req_type);
byte[] hsize = BitConverter.GetBytes(request.header.size);
byte[] hkey = StringToByteArray(request.header.key, Protocol.HEADER_KEY_LENGTH);
int oft = htype.Length + hsize.Length + HEADER_KEY_LENGTH;
byte[] header = new byte[oft];
System.Buffer.BlockCopy(htype, 0, header, 0, htype.Length);
System.Buffer.BlockCopy(hkey, 0, header, htype.Length + hsize.Length, HEADER_KEY_LENGTH);
/* encode data */
if (request.header.req_type == reqType.req_cnt)
{
RData_Connect data = (RData_Connect)Marshal.PtrToStructure(request.data, typeof(RData_Connect));
byte[] rtype = BitConverter.GetBytes((int)data.conn_type);
byte[] rname = StringToByteArray(data.name, Protocol.NICKNAME_LENGTH);
byte[] rpsswd = StringToByteArray(data.name, Protocol.PASSWORD_LENGTH);
byte[] content = new byte[oft + rtype.Length + NICKNAME_LENGTH + NICKNAME_LENGTH];
System.Buffer.BlockCopy(header, 0, content, 0, oft);
System.Buffer.BlockCopy(rtype, 0, content, oft, rtype.Length);
System.Buffer.BlockCopy(rname, 0, content, oft + rtype.Length, rname.Length);
System.Buffer.BlockCopy(rpsswd, 0, content, oft + rtype.Length + rname.Length, rpsswd.Length);
request.header.size = (ulong)(rtype.Length + rname.Length + rpsswd.Length);
hsize = BitConverter.GetBytes(request.header.size);
System.Buffer.BlockCopy(hsize, 0, content, htype.Length, hsize.Length);
return(content);
}
else if (request.header.req_type == reqType.req_snd)
{
RData_File data = (RData_File)Marshal.PtrToStructure(request.data, typeof(RData_File));
byte[] rid = BitConverter.GetBytes(data.id);
byte[] rtype = BitConverter.GetBytes((int)data.file_type);
byte[] rsize = BitConverter.GetBytes(data.size);
byte[] rdata = StringToByteArray(data.data, (int)data.size);
byte[] content = new byte[oft + rid.Length + rtype.Length + rsize.Length + rdata.Length];
System.Buffer.BlockCopy(header, 0, content, 0, oft);
System.Buffer.BlockCopy(rid, 0, content, oft, rid.Length);
System.Buffer.BlockCopy(rtype, 0, content, oft + rid.Length, rtype.Length);
System.Buffer.BlockCopy(rsize, 0, content, oft + rid.Length + rtype.Length, rsize.Length);
System.Buffer.BlockCopy(rdata, 0, content, oft + rid.Length + rtype.Length + rsize.Length, rdata.Length);
request.header.size = (ulong)(rid.Length + rtype.Length + rsize.Length + rdata.Length);
hsize = BitConverter.GetBytes(request.header.size);
System.Buffer.BlockCopy(hsize, 0, content, htype.Length, hsize.Length);
return(content);
}
else if (request.header.req_type == reqType.req_rcv)
{
request.header.size = (ulong)0;
hsize = BitConverter.GetBytes(request.header.size);
System.Buffer.BlockCopy(hsize, 0, header, htype.Length, hsize.Length);
return(header);
}
// else if (request.header.req_type == reqType.req_res)
return(new byte[0]);
}
