Hi,
I am using FGFS 0.9.10.I tried sending FGNetFDM structure(given in
net_fdm.cxx)(after doing htond or htonf) from one computer to another
computer running Flightgear but couldnt get it running. I tried Packet
Analyzer to check whether packets are reaching the particular PC or
not.Ifound that packets are reaching the PC running
Flightgear.Is there anyway I can verify on the destination PC that the
packets are in correct format...Can anyone provide me with sample UNIX
program to run Flightgear from external fdm data in the form of UDPpackets.
On 11/28/06, Anders Gidenstam <[EMAIL PROTECTED]> wrote:
On Tue, 28 Nov 2006, umesh pandey wrote:
> After converting FGNetFDM structure(given in net_fdm.cxx) by using
> htonf,htond or htonl, do we need to convert the structure into char
packets
> and send to FGFS. I am using FGFS 0.9.3.
Hi!
Well, when you have used hton*() on your struct it should (hopefully[1])
have the right (i.e. the one you should send) represantation in memory so
you can just reinterpret your struct as a char array of the right form:
typedef struct {...} mystruct_t;
mystruct_t anInstance;
char * sendbuffer = (char *)&anInstance;
This pointer could then be passed to sendto(2) or similar.
[1] The critical point here is to be sure that the compiler does not
insert any padding into the struct. Alternatively one could manually
and explicitly move the contents of the struct into a char array to be
sure it has exactly the right form (this is what I would do since
it also documents the actual packet format a bit more clearly).
Cheers,
Anders
--
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Anders Gidenstam
Algorithms and Complexity Group Phone: +49 (0) 681 9325 116
Max-Planck-Institut für Informatik Fax: +49 (0) 681 9325 199
Stuhlsatzenhausweg 85 Email: [EMAIL PROTECTED]
66123 Saarbrücken, Germany WWW:
http://www.mpi-inf.mpg.de/~andersg
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