forked from hsg4ok/mqtt
/
subackpacket.go
52 lines (48 loc) · 1001 Bytes
/
subackpacket.go
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package mqtt
import (
"bytes"
"errors"
"io"
)
type SubAckPacket struct {
// variable header
MessageID
// payload
GrantedQoS []QoSLevel
}
func (p SubAckPacket) write(w io.Writer) (err error) {
if len(p.GrantedQoS) == 0 {
err = errors.New("Invalid grantedqos length")
return
}
err = p.MessageID.write(w)
if err != nil {
return
}
for _, qos := range p.GrantedQoS {
err = qos.write(w)
if err != nil {
return
}
}
return
}
func readSubAckPayload(r *bytes.Reader) (p SubAckPacket, err error) {
p.MessageID, err = readMessageID(r)
if err != nil {
return
}
qos_size := r.Len()
if qos_size == 0 {
err = errors.New("Missing grantedqos")
return
}
p.GrantedQoS = make([]QoSLevel, qos_size)
for i := range p.GrantedQoS {
p.GrantedQoS[i], err = readQoS(r)
if err != nil {
return
}
}
return
}