public CommandResult(Packet p, Driver d)
{
driver = d;
packet = p;
fieldCount = (int)p.ReadLenInteger();
if (fieldCount == 0)
affectedRows =(int)p.ReadLenInteger();
}
public MySqlField GetField()
{
MySqlField f = new MySqlField( driver.Encoding );
packet = driver.ReadPacket();
f.TableName = packet.ReadLenString();
f.ColumnName = packet.ReadLenString();
f.ColumnLength = (int)packet.ReadNBytes();
f.Type = (MySqlDbType)packet.ReadNBytes();
packet.ReadByte(); // this is apparently 2 -- not sure what it is for
f.Flags = (ColumnFlags)packet.ReadInteger(2); //(short)(d.ReadByte() & 0xff);
f.NumericScale = packet.ReadByte();
fieldsRead++;
return f;
}
/// <summary>
/// Send a single packet to the server.
/// </summary>
/// <param name="packet">Packet to send to the server</param>
/// <remarks>This method will send a single packet to the server
/// possibly breaking the packet up into smaller packets that are
/// smaller than max_allowed_packet. This method will always send at
/// least one packet to the server</remarks>
protected void SendPacket(Packet packet)
{
byte[] buf = packet.GetBuffer();
int len = packet.Length;
int index = 0;
bool oneSent = false;
// make sure we are not trying to send too much
if (packet.Length > maxPacketSize && maxPacketSize > 0)
throw new MySqlException("Packet size too large. This MySQL server cannot accept rows larger than " + maxPacketSize + " bytes.");
try
{
while (len > 0 || ! oneSent)
{
int lenToSend = Math.Min( len, MAX_PACKET_SIZE );
// send the data
if (useCompression)
SendCompressedBuffer( buf, index, lenToSend );
else
{
WriteInteger( lenToSend, 3 );
writer.WriteByte( packetSeq++ );
writer.Write( buf, index, lenToSend );
writer.Flush();
}
len -= lenToSend;
index += lenToSend;
oneSent = true;
}
writer.Flush();
}
catch (Exception ex)
{
Console.WriteLine( ex.Message );
}
}
/// <summary>
/// Reads a single packet off the stream
/// </summary>
/// <returns></returns>
public Packet ReadPacket()
{
// if we have peeked at a packet, then return it
if (peekedPacket != null)
{
Packet packet = peekedPacket;
peekedPacket = null;
return packet;
}
Packet p = ReadPacketFromServer();
// if this is an error packet, then throw the exception
if (p[0] == 0xff)
{
p.ReadByte();
int errorCode = (int)p.ReadInteger(2);
string msg = p.ReadString();
throw new MySqlException( msg, errorCode );
}
return p;
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public Packet PeekPacket()
{
if (peekedPacket != null)
return peekedPacket;
peekedPacket = ReadPacket();
return peekedPacket;
}
/// <summary>
/// AuthenticateSecurity implements the new 4.1 authentication scheme
/// </summary>
/// <param name="packet">The in-progress packet we use to complete the authentication</param>
/// <param name="password">The password of the user to use</param>
private void AuthenticateSecurely( Packet packet, string password )
{
packet.WriteString("xxxxxxxx", encoding );
SendPacket(packet);
packet = ReadPacket();
// compute pass1 hash
string newPass = password.Replace(" ","").Replace("\t","");
SHA1 sha = new SHA1CryptoServiceProvider();
byte[] firstPassBytes = sha.ComputeHash( System.Text.Encoding.Default.GetBytes(newPass));
byte[] salt = packet.GetBuffer();
byte[] input = new byte[ firstPassBytes.Length + 4 ];
salt.CopyTo( input, 0 );
firstPassBytes.CopyTo( input, 4 );
byte[] outPass = new byte[100];
byte[] secondPassBytes = sha.ComputeHash( input );
byte[] cryptSalt = new byte[20];
Security.ArrayCrypt( salt, 4, cryptSalt, 0, secondPassBytes, 20 );
Security.ArrayCrypt( cryptSalt, 0, firstPassBytes, 0, firstPassBytes, 20 );
// send the packet
packet = CreatePacket(null);
packet.Write( firstPassBytes, 0, 20 );
SendPacket(packet);
}
public void Append( Packet p )
{
long oldPos = Position;
Position = Length;
this.Write( p.GetBuffer(), 0, p.Length );
Position = oldPos;
}
public Packet ReadPacket()
{
if (! HasMoreData) return null;
int len = this.ReadInteger(3);
byte seq = (byte)this.ReadByte();
byte[] buf = new byte[ len ];
this.Read( buf, 0, len );
Packet p = new Packet( buf, LongInts );
p.Sequence = seq;
p.Encoding = this.Encoding;
return p;
}
/// <summary>
/// Checks to see if there are any row packets coming
/// </summary>
/// <returns>True if there are row packets available, false if not</returns>
public bool CheckForRows()
{
// first read off any unread field defs
while (fieldsRead < fieldCount)
GetField();
// read off the end of schema packet
packet = driver.ReadPacket();
if ( ! packet.IsLastPacket())
throw new MySqlException("Expected end of schema packet");
readSchema = true;
packet = driver.PeekPacket();
return ! packet.IsLastPacket();
}
public bool ReadDataRow()
{
packet = driver.ReadPacket();
if (packet.IsLastPacket())
{
readRows = true;
return false;
}
fieldsRead = 0;
fieldLength = 0;
NextField();
return true;
}
