mirror of
https://github.com/Luzifer/culmqtt.git
synced 2024-09-20 07:42:59 +00:00
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package packets
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
)
|
|
|
|
//ConnackPacket is an internal representation of the fields of the
|
|
//Connack MQTT packet
|
|
type ConnackPacket struct {
|
|
FixedHeader
|
|
SessionPresent bool
|
|
ReturnCode byte
|
|
}
|
|
|
|
func (ca *ConnackPacket) String() string {
|
|
str := fmt.Sprintf("%s", ca.FixedHeader)
|
|
str += " "
|
|
str += fmt.Sprintf("sessionpresent: %t returncode: %d", ca.SessionPresent, ca.ReturnCode)
|
|
return str
|
|
}
|
|
|
|
func (ca *ConnackPacket) Write(w io.Writer) error {
|
|
var body bytes.Buffer
|
|
var err error
|
|
|
|
body.WriteByte(boolToByte(ca.SessionPresent))
|
|
body.WriteByte(ca.ReturnCode)
|
|
ca.FixedHeader.RemainingLength = 2
|
|
packet := ca.FixedHeader.pack()
|
|
packet.Write(body.Bytes())
|
|
_, err = packet.WriteTo(w)
|
|
|
|
return err
|
|
}
|
|
|
|
//Unpack decodes the details of a ControlPacket after the fixed
|
|
//header has been read
|
|
func (ca *ConnackPacket) Unpack(b io.Reader) error {
|
|
ca.SessionPresent = 1&decodeByte(b) > 0
|
|
ca.ReturnCode = decodeByte(b)
|
|
|
|
return nil
|
|
}
|
|
|
|
//Details returns a Details struct containing the Qos and
|
|
//MessageID of this ControlPacket
|
|
func (ca *ConnackPacket) Details() Details {
|
|
return Details{Qos: 0, MessageID: 0}
|
|
}
|