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package proxy
import (
"errors"
"image/color"
"net"
"github.com/HimbeerserverDE/mt"
)
var (
ErrNoServerConn = errors.New("no server connection")
ErrNoSuchServer = errors.New("inexistent server")
ErrNewMediaPool = errors.New("media pool unknown to client")
)
// Hop connects the ClientConn to the specified upstream server
// or the first working fallback server, saving the player's last server
// unless `ForceDefaultSrv` is enabled.
// If all attempts fail the client stays connected to the current server
// with the potential for inconsistent state.
// At the moment the ClientConn is NOT fixed if an error occurs
// so the player may have to reconnect.
func (cc *ClientConn) Hop(serverName string) (err error) {
defer func() {
if err == nil && !Conf().ForceDefaultSrv {
err = authIface.SetLastSrv(cc.Name(), serverName)
}
}()
err = cc.HopRaw(serverName)
return
}
// HopGroup connects the ClientConn to the specified server group
// or the first working fallback server, saving the player's last server
// unless `ForceDefaultSrv` is enabled.
// See the documentation on `Server.Groups` in `doc/config.md`
// for details on how a specific game server is selected from the group name.
// If all attempts fail the client stays connected to the current server
// with the potential for inconsistent state.
// At the moment the ClientConn is NOT fixed if an error occurs
// so the player may have to reconnect.
func (cc *ClientConn) HopGroup(groupName string) error {
choice, ok := Conf().RandomGroupServer(groupName)
if !ok {
return ErrNoSuchServer
}
return cc.Hop(choice)
}
// HopRaw connects the ClientConn to the specified upstream server.
// At the moment the ClientConn is NOT fixed if an error occurs
// so the player may have to reconnect.
//
// This method ignores fallback servers and doesn't save the player's
// last server.
// You may use the `Hop` wrapper for these purposes.
func (cc *ClientConn) HopRaw(serverName string) error {
cc.hopMu.Lock()
defer cc.hopMu.Unlock()
cc.Log("<->", "hop", serverName)
if cc.server() == nil {
return ErrNoServerConn
}
newSrv, ok := Conf().Servers[serverName]
if !ok {
return ErrNoSuchServer
}
if _, ok := cc.denyPools[newSrv.MediaPool]; ok {
return ErrNewMediaPool
}
if newSrv.poolAdded.After(cc.created) {
return ErrNewMediaPool
}
// This needs to be done before the ServerConn is closed
// so the clientConn isn't closed by the packet handler
cc.server().mu.Lock()
cc.server().clt = nil
cc.server().mu.Unlock()
cc.server().Close()
// Player CAO is a good indicator for full client initialization.
if cc.hasPlayerCAO() {
// Reset the client to its initial state
for _, inv := range cc.server().detachedInvs {
cc.SendCmd(&mt.ToCltDetachedInv{
Name: inv,
Keep: false,
})
}
var aoRm []mt.AOID
for ao := range cc.server().aos {
aoRm = append(aoRm, ao)
}
cc.SendCmd(&mt.ToCltAORmAdd{Remove: aoRm})
for spawner := range cc.server().particleSpawners {
cc.SendCmd(&mt.ToCltDelParticleSpawner{ID: spawner})
}
for sound := range cc.server().sounds {
cc.SendCmd(&mt.ToCltStopSound{ID: sound})
}
for hud := range cc.server().huds {
cc.SendCmd(&mt.ToCltRmHUD{ID: hud})
}
// Static parameters
cc.SendCmd(&mt.ToCltBreath{Breath: 10})
cc.SendCmd(&mt.ToCltCloudParams{})
cc.SendCmd(&mt.ToCltEyeOffset{})
cc.SendCmd(&mt.ToCltFOV{})
cc.SendCmd(&mt.ToCltFormspecPrepend{})
cc.SendCmd(&mt.ToCltHP{})
cc.SendCmd(&mt.ToCltHUDFlags{Mask: ^mt.HUDFlags(0), Flags: ^mt.HUDFlags(0)})
cc.SendCmd(&mt.ToCltLocalPlayerAnim{})
cc.SendCmd(&mt.ToCltMinimapModes{
Modes: mt.DefaultMinimap,
})
cc.SendCmd(&mt.ToCltMoonParams{
Visible: true,
Texture: "moon.png",
ToneMap: "moon_tonemap.png",
Size: 1,
})
cc.SendCmd(&mt.ToCltMovement{})
cc.SendCmd(&mt.ToCltOverrideDayNightRatio{})
cc.SendCmd(&mt.ToCltPrivs{})
for i := mt.HotbarParam(mt.HotbarSize); i <= mt.HotbarSelImg; i++ {
cc.SendCmd(&mt.ToCltSetHotbarParam{Param: i})
}
cc.SendCmd(&mt.ToCltSkyParams{
BgColor: color.NRGBA{255, 255, 255, 255},
Type: "regular",
Clouds: true,
SunFogTint: color.NRGBA{244, 125, 29, 255},
MoonFogTint: color.NRGBA{128, 153, 204, 255},
FogTintType: "default",
DayHorizon: color.NRGBA{144, 211, 246, 255},
DawnHorizon: color.NRGBA{186, 193, 240, 255},
NightHorizon: color.NRGBA{64, 144, 255, 255},
DaySky: color.NRGBA{97, 181, 245, 255},
DawnSky: color.NRGBA{180, 186, 250, 255},
NightSky: color.NRGBA{0, 107, 255, 255},
Indoor: color.NRGBA{100, 100, 100, 255},
BodyOrbitTilt: -1024,
FogDistance: -1,
})
cc.SendCmd(&mt.ToCltStarParams{
Visible: true,
Count: 1000,
Color: color.NRGBA{105, 235, 235, 255},
Size: 1,
})
cc.SendCmd(&mt.ToCltSunParams{
Visible: true,
Texture: "sun.png",
ToneMap: "sun_tonemap.png",
Rise: "sunrisebg.png",
Rising: true,
Size: 1,
})
var players []string
for player := range cc.server().playerList {
players = append(players, player)
}
cc.SendCmd(&mt.ToCltUpdatePlayerList{
Type: mt.RemovePlayers,
Players: players,
})
cc.SendCmd(&mt.ToCltLighting{Saturation: 1})
}
cc.mu.Lock()
cc.srv = nil
cc.mu.Unlock()
addr, err := net.ResolveUDPAddr("udp", newSrv.Addr)
if err != nil {
return err
}
conn, err := net.DialUDP("udp", nil, addr)
if err != nil {
return err
}
connect(conn, serverName, cc)
for ch := range cc.modChs {
cc.server().SendCmd(&mt.ToSrvJoinModChan{Channel: ch})
}
if cc.cltInfo != nil { // May not be initialized yet if this is an early fallback.
cc.server().SendCmd(cc.cltInfo)
}
return nil
}
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