111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
package session
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import (
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"bufio"
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"errors"
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"io"
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"log"
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"time"
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"badat.dev/maeqtt/v2/mqtt/packets"
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)
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type Connection struct {
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MaxPacketSize *uint32
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RecvMax uint16
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TopicAliasMax uint16
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WantsRespInf bool
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WantsProblemInf bool
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Will packets.Will
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KeepAliveInterval time.Duration
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keepAliveTicker time.Ticker
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PacketChannel chan packets.ClientPacket
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ClientDisconnectedChan chan bool
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rw io.ReadWriteCloser
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}
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func (c *Connection) resetKeepAlive() {
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if c.KeepAliveInterval != 0 {
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panic("TODO")
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// TODO IMPLEMENT THIS
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//s.keepAliveTicker.Reset(s.KeepAliveInterval)
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}
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}
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func (c *Connection) readPacket() (*packets.ClientPacket, error) {
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return packets.ReadPacket(bufio.NewReader(c.rw))
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}
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func (c *Connection) sendPacket(p packets.ServerPacket) error {
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c.resetKeepAlive()
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return p.Write(c.rw)
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}
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func (c *Connection) close() error {
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close(c.PacketChannel)
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return c.rw.Close()
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}
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func (c *Connection) PacketReadLoop() {
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for {
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pack, err := c.readPacket()
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if err != nil {
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c.ClientDisconnectedChan <- true
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c.close()
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} else {
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c.PacketChannel <- *pack
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}
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}
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}
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var FirstPackNotConnect error = errors.New("Failed to connect, first packet is not connect")
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func NewConnection(rw io.ReadWriteCloser) (ConnectionRequest, error) {
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connReq := ConnectionRequest{}
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conn := Connection{}
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connReq.Connection = &conn
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conn.rw = rw
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packet, err := conn.readPacket()
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conPack, isConn := (*packet).(packets.ConnectPacket)
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if !isConn {
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log.Println("Didn't receive a connect packet")
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err := packets.DisconnectPacket{
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ReasonCode: packets.DisconnectReasonCodeProtocolError,
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}.Write(rw)
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if err != nil {
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log.Println("Failed to disconnect after not receiving a connect packet", err)
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}
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return connReq, FirstPackNotConnect
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}
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connReq.ConnectPakcet = conPack
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if conPack.Properties.ReceiveMaximum.Value != nil {
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conn.RecvMax = *conPack.Properties.ReceiveMaximum.Value
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} else {
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conn.RecvMax = 65535
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}
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conn.MaxPacketSize = conPack.Properties.MaximumPacketSize.Value
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if conPack.Properties.TopicAliasMaximum.Value != nil {
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conn.TopicAliasMax = *conPack.Properties.TopicAliasMaximum.Value
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} else {
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conn.TopicAliasMax = 0
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}
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if conPack.Properties.RequestProblemInformation.Value != nil {
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conn.WantsRespInf = *conPack.Properties.RequestProblemInformation.Value != 0
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} else {
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conn.WantsRespInf = false
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}
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conn.KeepAliveInterval = time.Duration(conPack.KeepAliveInterval) * time.Second
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conn.PacketChannel = make(chan packets.ClientPacket, 1)
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return connReq, err
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}
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