Hello,
I have a device that is able to send and receive data via udp on a 
specific port.

//this way I get a socket, but if I specify the IP of the device instead 
of INADDR_ANY the socket will be 0

nSocket := SocketCreate( SOCK_DGRAM         , , INADDR_ANY, 5168, @nError)
SocketSetOption( nSocket, SO_BROADCAST, .T.  )
SocketSetOption( nSocket, SO_REUSEADDR, .T.  )

nBytesWritten := SocketSendTo(nSocket,myData,  ,    , 
{"192.168.99.160"},@nError)

either SocketSend or SocketSendTo do not write anything, instead the 
error is WSAEADDRNOTAVAIL
But I can ping the adress and from a C++ program I am able to send data 
via udp.

How to do a propper UDP connection?

Found the mistake, works no es expected:

nSocket := SocketNew(   ,SOCK_DGRAM , ,  @nError)
lRet := SocketConnect( nSocket        , , "192.168.99.160" , 5168 
@nError  )
SocketSetOption( nSocket, SO_BROADCAST, .T.  )
SocketSetOption( nSocket, SO_REUSEADDR, .T.  )
SocketSend(nSocket,myData,  ,    , , @nError )


Am 27.09.2019 um 08:46 schrieb Manfred Sauer:
> Hello,
> I have a device that is able to send and receive data via udp on a 
> specific port.
> 
> //this way I get a socket, but if I specify the IP of the device instead 
> of INADDR_ANY the socket will be 0
> 
> nSocket := SocketCreate( SOCK_DGRAM         , , INADDR_ANY, 5168, @nError)
> SocketSetOption( nSocket, SO_BROADCAST, .T.  )
> SocketSetOption( nSocket, SO_REUSEADDR, .T.  )
> 
> nBytesWritten := SocketSendTo(nSocket,myData,  ,    , 
> {"192.168.99.160"},@nError)
> 
> either SocketSend or SocketSendTo do not write anything, instead the 
> error is WSAEADDRNOTAVAIL
> But I can ping the adress and from a C++ program I am able to send data 
> via udp.
> 
> How to do a propper UDP connection?