Am 11.06.21 um 08:57 schrieb Kurt Van Dijck: > 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'm afraid I asked that question last month. https://marc.info/?l=linux-can&m=162110222418338&w=2 In Python3.9, it basically sums up to # making the socket self._s = socket.socket(socket.AF_CAN, socket.SOCK_DGRAM, socket.CAN_J1939) #binding the socket to a single defined address which is not 0, 254 or 255 by setting source_address to that value. pgn and source_address are actually filter values in this context. self._s.bind((interface, name, pgn, source_address)) #then use sendto and recvfrom. self._s.sendto(data, (self.interface, self.name, pgn, addr)) data, (interface, name, pgn, addr) = self._s.recvfrom(bufsize) C / C++ will work the same way. Kind Regards, Patrick Menschel
