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package serverdata
import (
"errors"
"github.com/osm/quake/common/buffer"
"github.com/osm/quake/common/context"
"github.com/osm/quake/protocol"
"github.com/osm/quake/protocol/fte"
"github.com/osm/quake/protocol/mvd"
)
var (
ErrUnknownProtocolVersion = errors.New("unknown protocol version")
)
type Command struct {
IsMVD bool
ProtocolVersion uint32
FTEProtocolExtension uint32
FTE2ProtocolExtension uint32
MVDProtocolExtension uint32
// NQ
MaxClients byte
GameType byte
SignOnMessage string
Models []string
Sounds []string
// QW
ServerCount int32
GameDirectory string
LastReceived float32
PlayerNumber byte
Spectator bool
LevelName string
Gravity float32
StopSpeed float32
MaxSpeed float32
SpectatorMaxSpeed float32
Accelerate float32
AirAccelerate float32
WaterAccelerate float32
Friction float32
WaterFriction float32
EntityGravity float32
}
func (cmd *Command) Bytes() []byte {
buf := buffer.New()
buf.PutByte(protocol.SVCServerData)
if cmd.FTEProtocolExtension > 0 {
buf.PutUint32(fte.ProtocolVersion)
buf.PutUint32(cmd.FTEProtocolExtension)
}
if cmd.FTE2ProtocolExtension > 0 {
buf.PutUint32(fte.ProtocolVersion2)
buf.PutUint32(cmd.FTE2ProtocolExtension)
}
if cmd.MVDProtocolExtension > 0 {
buf.PutUint32(mvd.ProtocolVersion)
buf.PutUint32(cmd.MVDProtocolExtension)
}
buf.PutUint32(uint32(cmd.ProtocolVersion))
if cmd.ProtocolVersion == protocol.VersionNQ {
buf.PutByte(cmd.MaxClients)
buf.PutByte(cmd.GameType)
buf.PutString(cmd.SignOnMessage)
for i := 0; i < len(cmd.Models); i++ {
buf.PutString(cmd.Models[i])
}
buf.PutByte(0x00)
for i := 0; i < len(cmd.Sounds); i++ {
buf.PutString(cmd.Sounds[i])
}
buf.PutByte(0x00)
} else {
buf.PutUint32(uint32(cmd.ServerCount))
buf.PutString(cmd.GameDirectory)
if cmd.IsMVD {
buf.PutFloat32(cmd.LastReceived)
} else {
buf.PutByte(cmd.PlayerNumber)
}
buf.PutString(cmd.LevelName)
if cmd.ProtocolVersion >= 25 {
buf.PutFloat32(cmd.Gravity)
buf.PutFloat32(cmd.StopSpeed)
buf.PutFloat32(cmd.MaxSpeed)
buf.PutFloat32(cmd.SpectatorMaxSpeed)
buf.PutFloat32(cmd.Accelerate)
buf.PutFloat32(cmd.AirAccelerate)
buf.PutFloat32(cmd.WaterAccelerate)
buf.PutFloat32(cmd.Friction)
buf.PutFloat32(cmd.WaterFriction)
buf.PutFloat32(cmd.EntityGravity)
}
}
return buf.Bytes()
}
func Parse(ctx *context.Context, buf *buffer.Buffer) (*Command, error) {
var err error
var cmd Command
cmd.IsMVD = ctx.GetIsMVD()
for {
pv, err := buf.GetUint32()
if err != nil {
return nil, err
}
if pv == fte.ProtocolVersion {
if cmd.FTEProtocolExtension, err = buf.GetUint32(); err != nil {
return nil, err
}
ctx.SetFTEProtocolExtension(cmd.FTEProtocolExtension)
if cmd.FTEProtocolExtension&fte.ExtensionFloatCoords != 0 {
ctx.SetAngleSize(2)
ctx.SetCoordSize(4)
}
continue
}
if pv == fte.ProtocolVersion2 {
if cmd.FTE2ProtocolExtension, err = buf.GetUint32(); err != nil {
return nil, err
}
ctx.SetFTE2ProtocolExtension(cmd.FTE2ProtocolExtension)
continue
}
if pv == mvd.ProtocolVersion {
if cmd.MVDProtocolExtension, err = buf.GetUint32(); err != nil {
return nil, err
}
ctx.SetMVDProtocolExtension(cmd.MVDProtocolExtension)
continue
}
if pv == protocol.VersionNQ || pv == protocol.VersionQW ||
pv == protocol.VersionQW210 || pv == protocol.VersionQW221 {
cmd.ProtocolVersion = pv
ctx.SetProtocolVersion(cmd.ProtocolVersion)
break
}
return nil, ErrUnknownProtocolVersion
}
if cmd.ProtocolVersion == protocol.VersionNQ {
if err = parseCommandNQ(ctx, buf, &cmd); err != nil {
return nil, err
}
} else {
if err = parseCommandQW(ctx, buf, &cmd); err != nil {
return nil, err
}
}
return &cmd, nil
}
func parseCommandNQ(ctx *context.Context, buf *buffer.Buffer, cmd *Command) error {
var err error
if cmd.MaxClients, err = buf.ReadByte(); err != nil {
return err
}
if cmd.GameType, err = buf.ReadByte(); err != nil {
return err
}
if cmd.SignOnMessage, err = buf.GetString(); err != nil {
return err
}
for {
var model string
if model, err = buf.GetString(); err != nil {
return err
}
if model == "" {
break
}
cmd.Models = append(cmd.Models, model)
}
for {
var sound string
if sound, err = buf.GetString(); err != nil {
return err
}
if sound == "" {
break
}
cmd.Sounds = append(cmd.Sounds, sound)
}
return nil
}
func parseCommandQW(ctx *context.Context, buf *buffer.Buffer, cmd *Command) error {
var err error
if cmd.ServerCount, err = buf.GetInt32(); err != nil {
return err
}
if cmd.GameDirectory, err = buf.GetString(); err != nil {
return err
}
if cmd.IsMVD {
if cmd.LastReceived, err = buf.GetFloat32(); err != nil {
return err
}
} else {
if cmd.PlayerNumber, err = buf.ReadByte(); err != nil {
return err
}
if cmd.PlayerNumber&128 != 0 {
cmd.Spectator = true
}
}
if cmd.LevelName, err = buf.GetString(); err != nil {
return err
}
if cmd.ProtocolVersion >= 25 {
if cmd.Gravity, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.StopSpeed, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.MaxSpeed, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.SpectatorMaxSpeed, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.Accelerate, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.AirAccelerate, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.WaterAccelerate, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.Friction, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.WaterFriction, err = buf.GetFloat32(); err != nil {
return err
}
if cmd.EntityGravity, err = buf.GetFloat32(); err != nil {
return err
}
}
return nil
}
|
