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67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
package protocol
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import (
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"errors"
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"fmt"
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"git.noahlan.cn/noahlan/nnet/core"
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"git.noahlan.cn/noahlan/nnet/entity"
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"git.noahlan.cn/noahlan/ntools-go/core/nlog"
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)
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type (
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HandshakeValidatorFunc func([]byte) error
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HandshakeAckBuilderFunc func() (interface{}, error)
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)
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func WithNNetPipeline(ackDataBuilder HandshakeAckBuilderFunc, validator HandshakeValidatorFunc) core.RunOption {
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packer := NewNNetPacker()
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return func(server *core.Server) {
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server.Pipeline().Inbound().PushFront(func(entity entity.NetworkEntity, v interface{}) error {
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pkg, ok := v.(*NNetPacket)
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if !ok {
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return ErrWrongPacketType
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}
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conn, _ := entity.Conn()
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switch pkg.PacketType {
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case Handshake:
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if err := validator(pkg.Data); err != nil {
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return err
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}
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data, err := ackDataBuilder()
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nlog.Must(err)
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hrd, _ := packer.Pack(Handshake, data)
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if err := entity.SendBytes(hrd); err != nil {
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return err
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}
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entity.SetStatus(core.StatusPrepare)
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nlog.Debugf("connection handshake Id=%d, Remote=%s", entity.Session().ID(), conn.RemoteAddr())
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case HandshakeAck:
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entity.SetStatus(core.StatusPending)
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nlog.Debugf("receive handshake ACK Id=%d, Remote=%s", entity.Session().ID(), conn.RemoteAddr())
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case Heartbeat:
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// Expected
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case Data:
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if entity.Status() < core.StatusPending {
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return errors.New(fmt.Sprintf("receive data on socket which not yet ACK, session will be closed immediately, remote=%s",
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conn.RemoteAddr()))
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}
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entity.SetStatus(core.StatusWorking)
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var lastMid uint64
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switch pkg.MsgType {
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case Request:
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lastMid = pkg.ID
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case Notify:
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lastMid = 0
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default:
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return fmt.Errorf("Invalid message type: %s ", pkg.MsgType.String())
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}
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entity.SetLastMID(lastMid)
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}
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return nil
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})
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}
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}
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