//Creates MetaData from Data to send
func CreateSendMetaData(data []byte) (meta MetaData, tcpData []byte) {
meta.DataId = lib.Random(1, IntMax)
tcpData = append(tcpData, lib.Uin32ToBytes(meta.DataId)...)
meta.Length = uint32(len(data))
tcpData = append(tcpData, lib.Uin32ToBytes(meta.Length)...)
meta.PocketCount = lib.CalcPocketCount(meta.Length, uint32(PocketLength))
meta.StopUDP = false
meta.DataStack = make(map[uint32][]byte, int(meta.PocketCount))
var (
pos, next int
current uint32
)
data_id_byte := lib.Uin32ToBytes(meta.DataId)
var append_data []byte
for i := uint32(0); i < meta.PocketCount; i++ {
current = uint32(i)
pos = int(i * PocketLength)
meta.DataStack[current] = append(meta.DataStack[current], data_id_byte...)
meta.DataStack[current] = append(meta.DataStack[current], lib.Uin32ToBytes(current)...)
next = pos + int(PocketLength)
if uint32(next) > meta.Length {
append_data = append(data[pos:], lib.FakeData((next - int(meta.Length)))...)
} else {
append_data = data[pos:next]
}
meta.DataStack[current] = append(meta.DataStack[current], append_data...)
}
return
}
//Crates MetaData from TCP received headers
func CreateMetaData(data []byte) (meta MetaData, converted bool) {
converted = true
meta.DataId, converted = lib.BytesToUint32(data[0:4])
if !converted {
lib.Log("Error Converting DataID !!")
return
}
meta.Length, converted = lib.BytesToUint32(data[4:8])
if !converted {
lib.Log("Error Converting Length !!")
return
}
meta.PocketCount = lib.CalcPocketCount(meta.Length, uint32(PocketLength))
meta.StopUDP = false
meta.DataStack = make(map[uint32][]byte)
return
}