hydra.go

   1 package main
   2
   3 import (
   4         _ "embed"
   5         "github.com/dragonfireclient/hydra-dragonfire/convert"
   6         "github.com/yuin/gopher-lua"
   7         "os"
   8         "os/signal"
   9         "syscall"
  10         "time"
  11 )
  12
  13 var lastTime = time.Now()
  14 var canceled = false
  15
  16 var serializeVer uint8 = 28
  17 var protoVer uint16 = 39
  18
  19 //go:embed builtin/luax/init.lua
  20 var builtinLuaX string
  21
  22 //go:embed builtin/vector.lua
  23 var builtinVector string
  24
  25 //go:embed builtin/escapes.lua
  26 var builtinEscapes string
  27
  28 //go:embed builtin/client.lua
  29 var builtinClient string
  30
  31 var builtinFiles = []string{
  32         builtinLuaX,
  33         builtinVector,
  34         builtinEscapes,
  35         builtinClient,
  36 }
  37
  38 var hydraFuncs = map[string]lua.LGFunction{
  39         "client":   l_client,
  40         "dtime":    l_dtime,
  41         "canceled": l_canceled,
  42         "poll":     l_poll,
  43         "close":    l_close,
  44 }
  45
  46 func signalChannel() chan os.Signal {
  47         sig := make(chan os.Signal, 1)
  48         signal.Notify(sig, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP)
  49         return sig
  50 }
  51
  52 func l_dtime(l *lua.LState) int {
  53         l.Push(lua.LNumber(time.Since(lastTime).Seconds()))
  54         lastTime = time.Now()
  55         return 1
  56 }
  57
  58 func l_canceled(l *lua.LState) int {
  59         l.Push(lua.LBool(canceled))
  60         return 1
  61 }
  62
  63 func l_poll(l *lua.LState) int {
  64         client, pkt, timeout := doPoll(l, getClients(l))
  65         l.Push(convert.PushPkt(l, pkt))
  66         if client == nil {
  67                 l.Push(lua.LNil)
  68         } else {
  69                 l.Push(client.userdata)
  70         }
  71         l.Push(lua.LBool(timeout))
  72         return 3
  73 }
  74
  75 func l_close(l *lua.LState) int {
  76         for _, client := range getClients(l) {
  77                 client.closeConn()
  78         }
  79
  80         return 0
  81 }
  82
  83 func main() {
  84         if len(os.Args) < 2 {
  85                 panic("missing filename")
  86         }
  87
  88         go func() {
  89                 <-signalChannel()
  90                 canceled = true
  91         }()
  92
  93         l := lua.NewState(lua.Options{IncludeGoStackTrace: true})
  94         defer l.Close()
  95
  96         arg := l.NewTable()
  97         for i, a := range os.Args {
  98                 l.RawSetInt(arg, i-1, lua.LString(a))
  99         }
 100         l.SetGlobal("arg", arg)
 101
 102         hydra := l.SetFuncs(l.NewTable(), hydraFuncs)
 103         l.SetField(hydra, "BS", lua.LNumber(10.0))
 104         l.SetField(hydra, "serialize_ver", lua.LNumber(serializeVer))
 105         l.SetField(hydra, "proto_ver", lua.LNumber(protoVer))
 106         l.SetGlobal("hydra", hydra)
 107
 108         l.SetField(l.NewTypeMetatable("hydra.auth"), "__index", l.SetFuncs(l.NewTable(), authFuncs))
 109         l.SetField(l.NewTypeMetatable("hydra.client"), "__index", l.NewFunction(l_client_index))
 110
 111         for _, str := range builtinFiles {
 112                 if err := l.DoString(str); err != nil {
 113                         panic(err)
 114                 }
 115         }
 116
 117         if err := l.DoFile(os.Args[1]); err != nil {
 118                 panic(err)
 119         }
 120 }