The default Telnetd idle timeout of 30 seconds seems somewhat short. Best to have it user-configurable (incl. the option to turn it off with an config value of 0).
Although a simple solution the recently introduced approach to just not listen to incoming connetions if there's already one has the downside that one doesn't know if a connection fails because the server is down or becuase there's a connection.
Therefore now connections are always accepted but after sending a message to the user and waiting a few seconds they are closed.
The appstate is used used in a somewhat unusual way here: The one and only "active" connection has an appstate of 0. For all other connections the appstate is initially set to 1. Then it is increased on every uIP poll until it reaches 10, which triggers the connection close. This somewhat hacky approach allows to keep track of the rejected sessions without any additional state variables and/or timers.
- PETSCII sending support
- Option to customize shell prompt and banner
- Stop all running commands on shell close
- New 'exit' and 'quit' commands to close shell
functions for converting between host and network byte order. These
names are the de facto standard names for this functionality because
of the original BSD TCP/IP implementation. But they cause problems for
uIP/Contiki: some platforms define these names themselves (Mac OS,
most notably), causing compilation problems for Contiki on those
platforms.
This commit changes all htons to uip_htons instead. Same goes for
htonl, ntohs, and ntohl. All-caps versions as well.
Therefore I replaced that hack with a clean CONF macro, which by the way really removes the run() and exec() functionality instead of just implementing it empty.
