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handshake.go
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handshake.go
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package mconn
import "github.com/juju/errors"
func (c *Conn) handshake(username, password, database string) error {
handshake, err := c.readHandshake()
if nil != err {
return errors.Trace(err)
}
if 0 == (handshake.CapabilityFlags & clientProtocol41) {
return errors.New("protocol version < 4.1 is not supported")
}
if 0 == (handshake.CapabilityFlags & clientSecureConnection) {
return errors.New("protocol only support secure connection")
}
// Send handshake response
var rsp PacketHandshakeResponse
rsp.Charset = CharsetUtf8GeneralCI
rsp.Username = username
rsp.Password = password
rsp.Database = database
capability := uint32(0)
capability |= clientProtocol41
capability |= clientSecureConnection
capability |= clientLongPassword
capability |= clientTransactions
capability |= clientLongFlag
capability &= handshake.CapabilityFlags
//capability = 0x000aa285
rsp.CapabilityFlags = capability
rsp.AuthPluginData = handshake.AuthPluginDataPart
rspData := rsp.Encode()
if err = c.WritePacket(rspData); nil != err {
return errors.Trace(err)
}
c.capability = capability
// Read server response
data, err := c.ReadPacket()
if nil != err {
return errors.Trace(err)
}
switch data[0] {
case PacketHeaderOK:
{
if _, err = c.readPacketOK(data); nil != err {
return errors.Trace(err)
}
// Handshake done
}
case PacketHeaderERR:
{
perr, err := c.readPacketERR(data)
if nil != err {
return errors.Trace(err)
}
return errors.New(perr.ErrorMessage)
}
}
// Update server info
c.si.ProtoVersion = handshake.ProtocolVersion
c.si.ServerVersion = handshake.ServerVersion
c.si.ConnectionID = handshake.ConnectionID
return nil
}
//
func (c *Conn) readHandshake() (*PacketHandshake, error) {
payloadData, err := c.ReadPacket()
if nil != err {
return nil, errors.Trace(err)
}
var packetHandshake PacketHandshake
if err = packetHandshake.Decode(payloadData); nil != err {
return nil, errors.Trace(err)
}
return &packetHandshake, nil
}