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         return 1
  55 }
  56
  57 func l_canceled(l *lua.LState) int {
  58         l.Push(lua.LBool(canceled))
  59         return 1
  60 }
  61
  62 func l_poll(l *lua.LState) int {
  63         client, pkt, timeout := doPoll(l, getClients(l))
  64         l.Push(convert.PushPkt(l, pkt))
  65         if client == nil {
  66                 l.Push(lua.LNil)
  67         } else {
  68                 l.Push(client.userdata)
  69         }
  70         l.Push(lua.LBool(timeout))
  71         return 3
  72 }
  73
  74 func l_close(l *lua.LState) int {
  75         for _, client := range getClients(l) {
  76                 client.closeConn()
  77         }
  78
  79         return 0
  80 }
  81
  82 func main() {
  83         if len(os.Args) < 2 {
  84                 panic("missing filename")
  85         }
  86
  87         go func() {
  88                 <-signalChannel()
  89                 canceled = true
  90         }()
  91
  92         l := lua.NewState(lua.Options{IncludeGoStackTrace: true})
  93         defer l.Close()
  94
  95         arg := l.NewTable()
  96         for i, a := range os.Args {
  97                 l.RawSetInt(arg, i-1, lua.LString(a))
  98         }
  99         l.SetGlobal("arg", arg)
 100
 101         hydra := l.SetFuncs(l.NewTable(), hydraFuncs)
 102         l.SetField(hydra, "BS", lua.LNumber(10.0))
 103         l.SetField(hydra, "serialize_ver", lua.LNumber(serializeVer))
 104         l.SetField(hydra, "proto_ver", lua.LNumber(protoVer))
 105         l.SetGlobal("hydra", hydra)
 106
 107         l.SetField(l.NewTypeMetatable("hydra.auth"), "__index", l.SetFuncs(l.NewTable(), authFuncs))
 108         l.SetField(l.NewTypeMetatable("hydra.client"), "__index", l.NewFunction(l_client_index))
 109
 110         for _, str := range builtinFiles {
 111                 if err := l.DoString(str); err != nil {
 112                         panic(err)
 113                 }
 114         }
 115
 116         if err := l.DoFile(os.Args[1]); err != nil {
 117                 panic(err)
 118         }
 119 }