The original implementation of net.accept did not unlisten the port
after returing. So additional clients can connect to the port, but the
connection is not used. The easiest way to solve this, is to make an
unlisten() call before returning from accept. But I think it is better
to separate listen/unlisten from accept and let the system allow
accepting new connections in the background which can be later taken
with a call to accept. This allows for example using a coroutine waiting
for new connections with a non-blocking accept loop and a yield call.
This commit contains everything to implement the new behaviour and also
add the methods net.listen and net.unlisten. To be compatible with the
old semantics net.accept automatically calls listen to the port.
In addtion the error handling of accept was changed in a way that a
timeout returns the new return value net.ERR_WAIT_TIMEDOUT instead of
returning -1. I find this more consistent.
- added the resolver application (src/uip/resolv.*) to eLua (configurable by BUILD_DNS in build.h) to allow DNS lookups
- more functions in the "net" module, more tests, it seems to work fine now in both "server mode" and "client mode"
- console over TCP works once again, or should I say "now works". It turns out that it never worked with the code in SVN, because I committed a wrong file a while ago.
ANSI terminal support (yet) and "recv" doesn't work anymore because XMODEM doesn't work over TCP/IP. Only for LM3S8962/LM3S6965 for now, but it should straightforward (not easy though)
to port it to other platforms. Only static IP for now. More TCP/IP functions need to be implemented (and an eLua module must be written to access them). To enable console over TCP:
- enable "BUILD_CON_TCP" in build.h, also disable "BUILD_XMODEM" and "BUILD_TERM" in build.h (you'll get an error if you don't)
- disable "BUILD_CON_GENERIC" in build.h (you'll get an error if you don't)
- edit your network settings in build.h
- build the image&burn it
- telnet to the address configured in build.h. Be sure to use a decent telnet client, like the one in Linux or putty. Don't try with telnet from Windows, as it surely won't work. Also, it might
not work with the telnet client from Tera Term Pro (didn't test this).
- type 'exit' from shell to terminate the connection.
Also, note that from this point on you'll need a newer version of binutils to compile for Cortex. I'm using binutils-2.19.50.tar.bz2 (from the snapshots page). 2.18 might work too, but I didn't
test it.
