Hi,
What's wrong with my UDP client?
echoClient :: IO ()
echoClient = withSocketsDo $ do
putStrLn "[a]"
sock <- socket AF_INET Datagram 0
putStrLn "[b]"
connect sock (SockAddrInet 9900 iNADDR_ANY)
putStrLn "[c]"
n <- send sock "hi"
putStrLn "[d]"
return ()
I get:
*Main> echoClient
[a]
[b]
*** Exception: connect: failed (Cannot assign requested address
(WSAEADDRNOTAVAI
L))
Thanks
-John
On 1/12/07, Gregory Wright <[EMAIL PROTECTED]> wrote:
Hi John,
On Jan 11, 2007, at 10:35 AM, Gregory Wright wrote:
>
> Hi John,
>
> On Jan 11, 2007, at 1:58 AM, John Ky wrote:
>
>> Hello,
>>
>> Does anyone know where I can find a simple UDP client/server
>> written in Haskell?
>>
>> Something along the lines of an echo server would do.
>>
>> Thanks
>>
>> -John
>>
>
> Try:
>
>
<snip>
For testing, you need only use
gregory-wrights-powerbook-g4-17> nc -ul -p 9900 127.0.0.1
and whatever you type should be echoed. My original description
of how to test:
>
> On my OS X/ppc 10.4.8 system, the above builds with ghc 6.6 and if
> I open one
> terminal with
>
> gregory-wrights-powerbook-g4-17> nc -u 127.0.0.1 9900
>
> and another with
>
> gregory-wrights-powerbook-g4-17> nc -ul -p 9900 127.0.0.1
>
> whatever I type into the first terminal appears on the second. You
> may have to
> consult your documentation for the options to your version of nc
> (or netcat,
> if you use that instead).
is wrong. (It will copy from one terminal to the other when the
daemon is not present.)
Best,
Greg
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