Socket Connector and Listener Script

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In this example there are two separate scripts running on two separate computers. There is the "listener" script that listens for a connection and uses the sListen and sAccept functions, and the "connecter" script that connects to the listener script and requests information. In this example the "connecter" script may request either a quote or the time of day. After the requested information is sent, the socket is closed. The "connecter" script needs to know the IP address and port name/number of the "listener" computer.

For Dial-up connections the winipcfg.exe program will report the assigned ip address. The IP Address usually changes on each separate connect, making it difficult to have a useful "listener" on a dial-up line.

The LISTENER script

;;;The LISTENER script
; Use CTRL-Break to exit
AddExtender("wwwsk34i.dll")
quote0="Few women admit their age, few men act it. "
quote1="Don't anthropomorphize computers. They hate that. "
quote2="ANIMAL LOVER ON BOARD. They're delicious. "
quote3="My karma ran over my dogma. "
quote4="The gene pool could use a little chlorine. "
quote5="Time is what keeps things from happening all at once. "
quote6="I didn't fight my way to the top of the food chain to be a vegetarian. "
quote7="Women who seek to be equal with men lack ambition. "
quote8="Your kid may be an honor student but you're still an idiot! "
quote9="If we aren't supposed to eat animals, why are they made with meat? "
maxquote=9
BoxOpen("Listener","")
listensocket=sOpen()
sListen(listensocket,"ftp")   ; use ftp port for lack of anything better
Served=0
while 1
   datasocket=sAccept(listensocket,@TRUE)  ; Block for a connection
   if datasocket
       gosub ProcessConnect
   else
      sClose(listenSocket)
      msg=wxGetLastErr()
      Message("Socket Error",msg)
      exit
  endif
endwhile
exit   
:ProcessConnect
         Served=Served+1
         rqst=sRecvLine(datasocket,20)
         rqst=strlower(rqst)
         if rqst=="time"
             rsp=TimeDate()
         else
            if rqst=="quote"
               mqr=random(maxquote)
               rsp=quote%mqr%
            else
               rsp="Error: Can only respond to TIME and QUOTE"
            endif
         endif
         BoxTitle(strcat("Served:",Served,"  Last=",wxGetInfo(2,datasocket)))
         BoxText(strcat(rqst," : ",rsp))
         sSendLine(datasocket,rsp)
         sClose(datasocket)
return

The CONNECTER script

AddExtender("wwwsk34i.dll")
while 1
   what=AskLine("Connecter","Enter TIME or QUOTE to get information from listener","QUOTE")
   talksocket=sOpen()
   ret=sConnect(talksocket,"206.63.11.252","ftp")
   sSendLine(talksocket,what)
   response=sRecvLine(talksocket,555)
   sClose(talksocket)
   Message(what,response)
endwhile

Article ID:   W16381

File Created: 2005:02:18:12:20:08

Last Updated: 2005:02:18:12:20:08

	DialUp Networking (DUN) Functions
	Error Messages
	Examples
	FTP Functions
	Get IP Address
	HTTP Functions
	s... Socket Functions
	Samples From Users
	SMTP Functions
	wx.... Functions

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Socket Connector and Listener Script