On Fri, 11 Jun 2021 06:12:32 +0200, Oleksij Rempel wrote: > Hi Rémy, > > On Tue, Jun 08, 2021 at 05:27:45PM +0200, Rémy DZIEMIASZKO wrote: > > Hello, > > > > I need that my applications do not care about J1939 node addresses but > > directly bind / connect to socket based on node name only and the > > kernel takes care of the conversion to addresses. > > > > I know this is possible if addresses are dynamically assigned through > > the Address Claiming protocol that is implemented in the kernel. The > > kernel keeps track of its own address and name as well as the > > addresses and names of other ECUs on the network and convert name to > > adresse when requested by the applications. > > > > But I don't want to use the Address Claiming protocol. I want to > > statically set all addresses and names. It is supported to not use Address Claiming. > > > > Is there a way to assign J1939 addresses and names to a CAN interface > > without using the J1939 address claim protocol? > > Current version do not have this functionality. If you bind() your socket with only sockaddr_can.j1939.sa set to your SA, and sockaddr_can.j1939.name to 0, makes your socket use your SA as static address. > > > I found in old j1939 kernel documentation something like > > ip addr add dev canX j1939 0xXX > > ip addr add dev canX j1939 name 0xXX > > See https://www.spinics.net/lists/netdev/msg162350.html > > > > But in the latest j1939 kernel documentation I do not find any > > reference to these commands. > > Yes, it was pre mainline version. For mainlining we reduced UAPI to the > minimum to simplify reviewing, mainlining and testing process. > The strict addressing was rejected because it felt much heavier than what most CAN users were used to. Moving to the current ad-hoc implementation allowed to drop quite some kernel code too. > IF you need this option, you are welcome to send patches :) > Or you can contact us or other company to implement it. > > Regards, > Oleksij > -- > Pengutronix e.K. | | > Steuerwalder Str. 21 | http://www.pengutronix.de/ | > 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
