Re: Sending UDP packets

[Saso Kiselkov]

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Simple: you didn't replace sendto() with a call to write() - Linux
accepts this (it simply regards connect() as a 'default' send address,
and allows you to override it on a per-packet basis using sendto()),
whereas Solaris and OSX will complain that it is invalid to use sendto()
on a socket with a destination address already set using connect().

I don't have OSX to test exactly, but my Solaris 10 machine stopped
complaining after I replaced sendto() with write() and I think OSX will
shut up as well (seems to be the same error).

- --
Saso

Andreas Höschler wrote:
> Dear Saso,
> 
>> Modified code snipped below:
> 
> Thanks a lot for the modified code snippets. I have incorporated your
> code into my UDPSender project (attached). When I run that I get
> 
> bash-2.05a$ /Build/UDPSender/obj/UDPSender
> Sending packet 0
> sendto() failed: Socket is already connected
> Sending packet 1
> sendto() failed: Socket is already connected
> Sending packet 2
> sendto() failed: Socket is already connected
> Sending packet 3
> sendto() failed: Socket is already connected
> Sending packet 4
> sendto() failed: Socket is already connected
> Sending packet 5
> sendto() failed: Socket is already connected
> Sending packet 6
> sendto() failed: Socket is already connected
> Sending packet 7
> sendto() failed: Socket is already connected
> Sending packet 8
> sendto() failed: Socket is already connected
> Sending packet 9
> sendto() failed: Socket is already connected
> bash-2.05a$
> 
> on the Mac and
> 
> -bash-3.00$  /Build/UDPSender/obj/UDPSender
> Sending packet 0
> sendto() failed: Transport endpoint is already connected
> Sending packet 1
> sendto() failed: Transport endpoint is already connected
> Sending packet 2
> sendto() failed: Transport endpoint is already connected
> Sending packet 3
> sendto() failed: Transport endpoint is already connected
> Sending packet 4
> sendto() failed: Transport endpoint is already connected
> Sending packet 5
> sendto() failed: Transport endpoint is already connected
> Sending packet 6
> sendto() failed: Transport endpoint is already connected
> Sending packet 7
> sendto() failed: Transport endpoint is already connected
> Sending packet 8
> sendto() failed: Transport endpoint is already connected
> Sending packet 9
> sendto() failed: Transport endpoint is already connected
> -bash-3.00$
> 
> on Solaris!?
> 
> Any ideas?
> 
> Regards,
> 
>  Andreas
> 
> 
> 

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