load(DrvConn conn)
{
MsgConn msg = conn.msg;
bool isBlankDateNull = conn.isBlankDateNull;
short count = msg.readShort();
AdvanRSMD rsmd = new AdvanRSMD(count, conn.trace);
for (short col = 0; col < count; col++)
{
ProviderType sql_type = (ProviderType)
msg.readShort();
short dbms_type = msg.readShort();
short length = msg.readShort();
byte precision = msg.readByte();
byte scale = msg.readByte();
byte flags = msg.readByte();
if (isBlankDateNull && sql_type == ProviderType.DateTime)
{
flags |= MSG_DSC_NULL; // return empty date as null
}
String name = msg.readString();
switch (sql_type)
{
case ProviderType.DateTime:
if (dbms_type == 0)
{
dbms_type = DBMS_TYPE_IDATE;
}
break;
case ProviderType.Interval:
/*
** Intervals are not supported directly
*/
if (dbms_type == DBMS_TYPE_INTDS)
{
sql_type = ProviderType.IntervalDayToSecond;
}
else
{
sql_type = ProviderType.VarChar;
}
length = (short)((dbms_type == DBMS_TYPE_INTYM) ? 8 : 15);
precision = scale = 0;
break;
}
rsmd.desc[col].name = name;
rsmd.desc[col].sql_type = sql_type;
rsmd.desc[col].dbms_type = dbms_type;
rsmd.desc[col].length = length;
rsmd.desc[col].precision = precision;
rsmd.desc[col].scale = scale;
rsmd.desc[col].flags = flags;
}
return(rsmd);
} // load
} // DrvObj
/// <summary>
/// Set the DrvConn server connection information.
/// </summary>
/// <param name="conn"></param>
protected internal void set(DrvConn conn)
{
this.conn = conn;
if (conn == null)
{
this.msg = null;
this.trace = null;
return;
}
this.msg = conn.msg;
this.trace = conn.trace;
}
reload(DrvConn conn)
{
MsgConn msg = conn.msg;
bool isBlankDateNull = conn.isBlankDateNull;
short new_count = msg.readShort();
short common = (short)System.Math.Min(new_count, count);
if (new_count != count)
{
resize(new_count);
}
for (short col = 0; col < count; col++)
{
ProviderType sql_type = (ProviderType)msg.readShort();
short dbms_type = msg.readShort();
short length = msg.readShort();
byte precision = msg.readByte();
byte scale = msg.readByte();
byte flags = msg.readByte();
if (isBlankDateNull && sql_type == ProviderType.DateTime)
{
flags |= MSG_DSC_NULL; // return empty date as null
}
String name = msg.readString();
switch (sql_type)
{
case ProviderType.DateTime:
if (dbms_type == 0)
{
dbms_type = DBMS_TYPE_IDATE;
}
break;
case ProviderType.Interval:
/*
** Intervals are not supported directly
*/
if (dbms_type == DBMS_TYPE_INTDS)
{
sql_type = ProviderType.IntervalDayToSecond;
}
else
{
sql_type = ProviderType.VarChar;
}
length = (short)((dbms_type == DBMS_TYPE_INTYM) ? 8 : 15);
precision = scale = 0;
break;
}
if (col < common && trace.enabled(5))
{
if (sql_type != desc[col].sql_type)
{
trace.write(tr_id + ": reload[" + col + "] sql_type " +
desc[col].sql_type + " => " + sql_type);
}
if (dbms_type != desc[col].dbms_type)
{
trace.write(tr_id + ": reload[" + col + "] dbms_type " +
desc[col].dbms_type + " => " + dbms_type);
}
if (length != desc[col].length)
{
trace.write(tr_id + ": reload[" + col + "] length " +
desc[col].length + " => " + length);
}
if (precision != desc[col].precision)
{
trace.write(tr_id + ": reload[" + col + "] precision " +
desc[col].precision + " => " + precision);
}
if (scale != desc[col].scale)
{
trace.write(tr_id + ": reload[" + col + "] scale " +
desc[col].scale + " => " + scale);
}
if (flags != desc[col].flags)
{
trace.write(tr_id + ": reload[" + col + "] flags " +
desc[col].flags + " => " + flags);
}
}
desc[col].name = name;
desc[col].sql_type = sql_type;
desc[col].dbms_type = dbms_type;
desc[col].length = length;
desc[col].precision = precision;
desc[col].scale = scale;
desc[col].flags = flags;
}
return;
}
/*
** Name: connect
**
** Description:
** Establish a connection to the Data Access Server. If requested,
** the connection will enable the management of distributed
** transactions.
**
** Input:
** charset Character set/encoding for connection..
** dtmc Distributed Transaction Management Connection?
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 28-Mar-01 (gordy)
** Extracted from Driver.
** 18-Apr-01 (gordy)
** Added support for Distributed Transaction Management Connections.
** 31-Oct-02 (gordy)
** Adapted for generic GCF driver.
** 20-Dec-02 (gordy)
** Added charset parameter for connection character encoding.
** Inform messaging system of the negotiated protocol level.
** 6-jul-04 (gordy; ported by thoda04)
** Negotiate session mask.
** 1-Mar-07 (gordy, ported by thoda04)
** Dropped char_set parameter, don't default CharSet.
*/
private void connect( bool dtmc )
{
byte[] msg_cp;
int len;
bool mask_received = false;
/*
** Build DAM-ML protocol initialization parameters.
*/
len = 3; // Protocol
len += (2 + session_mask.Length); // Session mask
if ( dtmc ) len += 2; // DTMC
msg_cp = new byte[ len ];
len = 0;
msg_cp[len++] = MSG_P_PROTO; // Protocol
msg_cp[len++] = (byte)1;
msg_cp[len++] = MSG_PROTO_DFLT;
msg_cp[len++] = MSG_P_MASK; // Session mask
msg_cp[len++] = (byte)session_mask.Length;
for( int i = 0; i < session_mask.Length; i++ )
msg_cp[len++] = session_mask[ i ];
if ( dtmc ) // DTMC
{
msg_cp[len++] = MSG_P_DTMC;
msg_cp[len++] = (byte)0;
}
/*
** Establish a connection with the server.
*/
if ( trace.enabled( 2 ) )
trace.write( tr_id + ": Connecting to server: " + host );
msg = new MsgConn( host, ref msg_cp );
tr_id += "[" + msg.ConnID + "]"; // Add instance ID
/*
** Process the DAM-ML protocol initialization result paramters
*/
try
{
for( int i = 0; i < msg_cp.Length - 1; )
{
byte param_id = msg_cp[ i++ ];
byte param_len = msg_cp[ i++ ];
switch( param_id )
{
case MSG_P_PROTO :
if ( param_len != 1 || i >= msg_cp.Length )
{
if ( trace.enabled( 1 ) )
trace.write( tr_id + ": Invalid PROTO param length: " +
param_len + "," + (msg_cp.Length - i) );
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR );
}
msg_protocol_level = msg_cp[ i++ ];
msg.ML_ProtocolLevel = msg_protocol_level;
break;
case MSG_P_DTMC :
if ( param_len != 0 )
{
if ( trace.enabled( 1 ) )
trace.write( tr_id + ": Invalid DTMC param length: " +
param_len );
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR );
}
is_dtmc = true;
break;
case MSG_P_MASK :
/*
** Server must respond with matching mask
** or not at all.
*/
if ( param_len != session_mask.Length )
{
if ( trace.enabled( 1 ) )
trace.write( tr_id +
": Invalid mask param length: " +
param_len );
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR );
}
/*
** Combine server session mask with ours.
*/
for( int j = 0; j < session_mask.Length; j++, i++ )
session_mask[ j ] ^= msg_cp[ i ];
mask_received = true;
break;
default :
if ( trace.enabled( 1 ) )
trace.write(tr_id + ": Invalid param ID: " + param_id);
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR );
}
}
/*
** Validate protocol.
*/
if (msg_protocol_level < MSG_PROTO_1 ||
msg_protocol_level > MSG_PROTO_DFLT )
{
if ( trace.enabled( 1 ) )
trace.write( tr_id + ": Invalid MSG protocol: " +
msg_protocol_level );
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR );
}
/*
** Validate session mask.
*/
if ( ! mask_received ) session_mask = null;
/*
** Validate DTMC environment.
*/
if ( is_dtmc )
{
if ( ! dtmc ) // Should not happen.
{
if ( trace.enabled( 1 ) )
trace.write(tr_id + ": DTM connection not requested!");
throw SqlEx.get( ERR_GC4001_CONNECT_ERR );
}
if ( msg_protocol_level < MSG_PROTO_2 )
{
if ( trace.enabled( 1 ) )
trace.write( tr_id + ": 2PC not supported" );
throw SqlEx.get( ERR_GC4019_UNSUPPORTED );
}
/*
** Autocommit is disabled for DTM connections.
*/
autoCommit = false;
}
else if ( dtmc )
{
if ( trace.enabled( 1 ) )
trace.write(tr_id+": Could not establish DTM connection!");
throw SqlEx.get( ERR_GC4019_UNSUPPORTED );
}
}
catch( SqlEx ex )
{
msg.close();
throw ex;
}
if ( trace.enabled( 2 ) )
{
trace.write( tr_id + ": connected to server" );
if ( trace.enabled( 3 ) )
{
trace.write( tr_id + ": messaging protocol initialized:" );
trace.write( " MSG protocol: " + msg_protocol_level );
if ( is_dtmc ) trace.write( " DTM Connection" );
if ( session_mask != null )
trace.write( " Session mask: " +
session_mask.Length + " bytes" );
}
}
return;
}
connect(bool dtmc)
{
byte[] msg_cp;
int len;
bool mask_received = false;
/*
** Build DAM-ML protocol initialization parameters.
*/
len = 3; // Protocol
len += (2 + session_mask.Length); // Session mask
if (dtmc)
{
len += 2; // DTMC
}
msg_cp = new byte[len];
len = 0;
msg_cp[len++] = MSG_P_PROTO; // Protocol
msg_cp[len++] = (byte)1;
msg_cp[len++] = MSG_PROTO_DFLT;
msg_cp[len++] = MSG_P_MASK; // Session mask
msg_cp[len++] = (byte)session_mask.Length;
for (int i = 0; i < session_mask.Length; i++)
{
msg_cp[len++] = session_mask[i];
}
if (dtmc) // DTMC
{
msg_cp[len++] = MSG_P_DTMC;
msg_cp[len++] = (byte)0;
}
/*
** Establish a connection with the server.
*/
if (trace.enabled(2))
{
trace.write(tr_id + ": Connecting to server: " + host);
}
msg = new MsgConn(host, ref msg_cp);
tr_id += "[" + msg.ConnID + "]"; // Add instance ID
/*
** Process the DAM-ML protocol initialization result paramters
*/
try
{
for (int i = 0; i < msg_cp.Length - 1;)
{
byte param_id = msg_cp[i++];
byte param_len = msg_cp[i++];
switch (param_id)
{
case MSG_P_PROTO:
if (param_len != 1 || i >= msg_cp.Length)
{
if (trace.enabled(1))
{
trace.write(tr_id + ": Invalid PROTO param length: " +
param_len + "," + (msg_cp.Length - i));
}
throw SqlEx.get(ERR_GC4002_PROTOCOL_ERR);
}
msg_protocol_level = msg_cp[i++];
msg.ML_ProtocolLevel = msg_protocol_level;
break;
case MSG_P_DTMC:
if (param_len != 0)
{
if (trace.enabled(1))
{
trace.write(tr_id + ": Invalid DTMC param length: " +
param_len);
}
throw SqlEx.get(ERR_GC4002_PROTOCOL_ERR);
}
is_dtmc = true;
break;
case MSG_P_MASK:
/*
** Server must respond with matching mask
** or not at all.
*/
if (param_len != session_mask.Length)
{
if (trace.enabled(1))
{
trace.write(tr_id +
": Invalid mask param length: " +
param_len);
}
throw SqlEx.get(ERR_GC4002_PROTOCOL_ERR);
}
/*
** Combine server session mask with ours.
*/
for (int j = 0; j < session_mask.Length; j++, i++)
{
session_mask[j] ^= msg_cp[i];
}
mask_received = true;
break;
default:
if (trace.enabled(1))
{
trace.write(tr_id + ": Invalid param ID: " + param_id);
}
throw SqlEx.get(ERR_GC4002_PROTOCOL_ERR);
}
}
/*
** Validate protocol.
*/
if (msg_protocol_level < MSG_PROTO_1 ||
msg_protocol_level > MSG_PROTO_DFLT)
{
if (trace.enabled(1))
{
trace.write(tr_id + ": Invalid MSG protocol: " +
msg_protocol_level);
}
throw SqlEx.get(ERR_GC4002_PROTOCOL_ERR);
}
/*
** Validate session mask.
*/
if (!mask_received)
{
session_mask = null;
}
/*
** Validate DTMC environment.
*/
if (is_dtmc)
{
if (!dtmc) // Should not happen.
{
if (trace.enabled(1))
{
trace.write(tr_id + ": DTM connection not requested!");
}
throw SqlEx.get(ERR_GC4001_CONNECT_ERR);
}
if (msg_protocol_level < MSG_PROTO_2)
{
if (trace.enabled(1))
{
trace.write(tr_id + ": 2PC not supported");
}
throw SqlEx.get(ERR_GC4019_UNSUPPORTED);
}
/*
** Autocommit is disabled for DTM connections.
*/
autoCommit = false;
}
else if (dtmc)
{
if (trace.enabled(1))
{
trace.write(tr_id + ": Could not establish DTM connection!");
}
throw SqlEx.get(ERR_GC4019_UNSUPPORTED);
}
}
catch (SqlEx ex)
{
msg.close();
throw ex;
}
if (trace.enabled(2))
{
trace.write(tr_id + ": connected to server");
if (trace.enabled(3))
{
trace.write(tr_id + ": messaging protocol initialized:");
trace.write(" MSG protocol: " + msg_protocol_level);
if (is_dtmc)
{
trace.write(" DTM Connection");
}
if (session_mask != null)
{
trace.write(" Session mask: " +
session_mask.Length + " bytes");
}
}
}
return;
} // connect
