// Process a single byte received from the client
func (me *Telnet) ProcessByte(bin byte) bool {
monolog.Log("TELNET", "ProcessByte %d %d", bin, me.state)
switch me.state {
// regular data
case data_state:
return me.dataStateProcessByte(bin)
// IAC received before
case iac_state:
return me.iacStateProcessByte(bin)
case will_state, wont_state, do_state, dont_state:
return me.DoNegotiate(me.state, bin)
// subnegotiation started, determine option to subnegotiate
case sb_state:
me.sb_telopt = bin
me.state = sb_data_state
// subnegotiation data, buffer bytes until the end request
case sb_data_state:
return me.sbdataStateProcessByte(bin)
// IAC received inside a subnegotiation
case sb_data_iac_state:
return me.sbdataiacStateProcessByte(bin)
default:
// programing error, shouldn't happen
panic("Error in telnet state machine!")
}
// return false to signal compression needn't start
return false
}
// Append a byte to the data buffer
func (me *Telnet) appendByte(bin byte) {
monolog.Log("TELNET", "Appending to telnet buffer: %d %d", len(me.buffer), cap(me.buffer))
me.buffer = append(me.buffer, bin)
}