Thank you Jan! Because i want to develop against the posix skin, i now added the posix wrapper options to the linker call (posix.wrappers) and use the function calls without rt_dev prefix. It works! Unfortunately a new problem or misunderstanding occured. I want to set a socket to timeout behaviour for receiving and used ioctl.......argh..... Everytime i tried to ioctl the socket behaviour, no matter if blocking, nonblocking, timeouting (;)), recvfrom returned with error. If i rt_dev_ioctl the socket it works..hmm. But i've seen, that ioctl ist also wrapped by Xennomai. Is there something more i've not noticed??
Regards, Jörn -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Gesendet: Donnerstag, 17. April 2008 23:19 An: Jörn Hoffmann Cc: rtnet-users@lists.sourceforge.net Betreff: Re: [RTnet-users] rt_dev_sendto() Jörn Hoffmann wrote: > Ok, not it works. I linked against libpthread_rt and librt to get the example > working. > Then i went back to my app with the libs linked and.....it works. > So if i not link my app to libpthread_rt and librt, sending will fail. > I have no idea.... Please have a look at the Makefiles and/or the LDFLAGS reported back by xeno_config --posix_ldflags. When programming against the POSIX API and messing up this step, you end up using plain Linux. When developing against the native API (rt_dev_*), you just need the right header and -lnative (both informations are also returned by xeno_config if you ask for it). > > -----Ursprüngliche Nachricht----- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Auftrag von Jörn > Hoffmann > Gesendet: Donnerstag, 17. April 2008 15:11 > An: rtnet-users@lists.sourceforge.net > Betreff: [RTnet-users] rt_dev_sendto() > > > Hi there, > > i'm new to RTnet and i'm just starting playing a little bit. I have xenomai > installed and at first i only > want to send one udp-packet to a remote host. I'm using rt_dev_socket(), > rt_dev_sendto() and rt_dev_close(). > Unfortunately, the rt_dev_sendto() returns -1 but errno is 0. I cannot > whireshark any packet. See API documentation of rt_dev_* [1]: it returns the error directly, not via errno. That means you called rt_dev_sendto from non-RT context, likely. > I do not really know what's going and where i'm wrong. > The remote host is rtrouted, the nic is conigured and up. RTping works fine. > > Does anybody have any suggestions to figure out what happens? > > Thanks in advance, > Jörn > > btw...i'm a little bit confused about the rtnet-xenomai example (rtt-sender) > as for me it seems that there > the linux-socket-functions will be called. I can't see any rt_dev-prefixes. > Are these calls catched by rtnet??? Linker magic ('--wrap sendto' e.g), essential part of the Xenomai POSIX skin build process. There should be some thread about this topic in the RTnet archive. Jan [1]http://www.xenomai.org/documentation/branches/v2.4.x/html/api/group__userapi.html
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