Python and UDP sockets

[Zunbeltz Izaola]

Werner Schiendl <n17999950.temp.werner at neverbox.com> writes:

Hi

Thanks for the point. I'm using struct and it is working well. 
Thanks again

Zunbeltz

> Hi,
> 
> look at the struct module from the python standard library.
> 
> in particular, struct.pack allows to format your data as required.
> 
> hth
> Werner
> 
> 
> Zunbeltz Izaola wrote:
> 
> > Hi!
> > I want to port a small socket aplication (in C) to Python.
> > The server is writen in C, and it expected to recibe and C struct
> > like this struct tag_instruccion
> > {
> >     unsigned int Handle  __attribute__  ((aligned(1)));
> >     int	Codigo __attribute__  ((aligned(1)));
> >     double Param[10]  __attribute__  ((aligned(1)));
> >     char Comando[_MAX_PATH] __attribute__  ((aligned(1))) ;
> >     char Instruc[_MAX_PATH] __attribute__  ((aligned(1))) ;
> > };
> > I know that the functions for sockets are essentialy those that are
> > in
> > C (BSD sockets), but i don't know how to send this kind of struct
> > directly.
> > One of the function to send a socket is this
> > EnviaMensaje(SOCKET iSocket,int port,char *host, instruccion
> > *Instruccion)
> > {
> >     struct sockaddr_in siSockAddr;
> >     int iRc;
> >     CodigoMensaje resultado;
> >         if (iSocket != INVALID_SOCKET)
> >     {
> > 	memset((char *)&siSockAddr,0,sizeof(siSockAddr));
> > 	siSockAddr.sin_family = AF_INET;
> > 	siSockAddr.sin_port = htons(port);
> > 	siSockAddr.sin_addr.s_addr = inet_addr(host);
> > 	iRc = sendto(iSocket,(char const FAR *)Instruccion,sizeof(instruccion),0,(struct sockaddr FAR *)(&siSockAddr),sizeof(siSockAddr));
> >     }
> >         return iRc;
> > }
> > Can someone help me?
> > Thanks in advance
> > Zunbeltz Izaola
> >
> 

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