mirror of
https://github.com/OpenDiablo2/OpenDiablo2
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c27fb572bc
* Added automap.go stub * Handle errors in original AutoMap.txt file * Completed AutoMapRecord struct and comments * AutoMap loader implemented * Update from base repo * Comments added to d2netpacket and d2netpackettype. Note, the Overview for d2netpacket is in net_packet.go. It could be placed in a doc.go file but net_packet.go seemed appropriate in this case. * Comments added to d2server * client_connection.go missed from previous commit * Comments added to d2client * Doc.go added to d2networking and other corrections * Unused parameter present to satisfy interface, named it '_' * Unhandled errors and other issues resolved in d2networking. This commit adds simple error reporting and creates a lot of mess. I will be doing one more pass to tidy things up a bit before I move on. * Commented out continue on RemoteClientConnection error and implemented stringer in message type * NetPacketType.String uses map instead of switch. * Map moved into String method
87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
// Package d2udpclientconnection provides an implementation of a UDP client connection with a game state.
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package d2udpclientconnection
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import (
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"bytes"
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"compress/gzip"
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"encoding/json"
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"errors"
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"fmt"
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"net"
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"github.com/OpenDiablo2/OpenDiablo2/d2networking/d2client/d2clientconnectiontype"
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"github.com/OpenDiablo2/OpenDiablo2/d2game/d2player"
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"github.com/OpenDiablo2/OpenDiablo2/d2networking/d2netpacket"
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)
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// UDPClientConnection is the implementation of the
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// d2server.ClientConnection interface to represent remote client from the
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// server perspective.
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type UDPClientConnection struct {
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id string // ID of the associated RemoteClientConnection
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address *net.UDPAddr // IP address of the associated RemoteClientConnection
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udpConnection *net.UDPConn // Server's UDP Connection
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playerState *d2player.PlayerState // Client's game state
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}
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// CreateUDPClientConnection constructs a new UDPClientConnection and
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// returns a pointer to it.
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func CreateUDPClientConnection(udpConnection *net.UDPConn, id string, address *net.UDPAddr) *UDPClientConnection {
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result := &UDPClientConnection{
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id: id,
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address: address,
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udpConnection: udpConnection,
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}
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return result
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}
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// GetUniqueId returns UDPClientConnection.id
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func (u UDPClientConnection) GetUniqueId() string {
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return u.id
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}
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// GetConnectionType returns an enum representing the connection type.
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// See: d2clientconnectiontype.
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func (u UDPClientConnection) GetConnectionType() d2clientconnectiontype.ClientConnectionType {
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return d2clientconnectiontype.LANClient
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}
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// SendPacketToClient compresses the JSON encoding of a NetPacket and
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// sends it to the client.
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func (u *UDPClientConnection) SendPacketToClient(packet d2netpacket.NetPacket) error {
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data, err := json.Marshal(packet.PacketData)
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if err != nil {
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return err
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}
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var buff bytes.Buffer
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buff.WriteByte(byte(packet.PacketType))
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writer, _ := gzip.NewWriterLevel(&buff, gzip.BestCompression)
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if written, err := writer.Write(data); err != nil {
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return err
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} else if written == 0 {
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return errors.New(fmt.Sprintf("RemoteClientConnection: attempted to send empty %v packet body.", packet.PacketType))
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}
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if err = writer.Close(); err != nil {
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return err
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}
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if _, err = u.udpConnection.WriteToUDP(buff.Bytes(), u.address); err != nil {
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return err
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}
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return nil
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}
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// SetPlayerState sets UDP.playerState to the given value.
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func (u *UDPClientConnection) SetPlayerState(playerState *d2player.PlayerState) {
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u.playerState = playerState
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}
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// GetPlayerState returns UDPClientConnection.playerState.
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func (u *UDPClientConnection) GetPlayerState() *d2player.PlayerState {
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return u.playerState
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}
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