Hi Patrik, sorry for the long response time. > > We're running connman on a system using PTP (IEEE1588). The problem is > > that connman is fiddling with the rp_filter settings and activating > > loose mode routing (value 2) if two or more services are present. We > > cannot have ip_filter activated because it blocks certain PTP frames. > > What is getting blocked? >
IP Multicast frames originating from a direct Ethernet neighbor in the same subnet. These are PTPv2 Announce Messages. This is a captured example in K12 format: +---------+---------------+----------+ 23:31:42,553,828 ETHER |0 |01|00|5e|00|01|81|1c|ba|8c|9c|a4|3c|08|00|45|00|00|5c|5f|bf|40|00|01|11|0f|ea|c0|a8|67|be|e0|00|01|81|01|40|01|40|00|48|84|82|0b|02|00|40|00|00|00|08|00|00|00|00|00|00|00|00|00|00|00|00|52|e4|6b|ff|fe|34|ee|1f|00|02|00|01|05|00|00|00|00|00|00|00|00|00|00|00|00|23|00|80|f8|fe|ff|ff|80|52|e4|6b|ff|fe|34|ee|1f|00|00|a0| It is strange that I can't see these frames being dropped with log_martians: echo 2 > /proc/sys/net/ipv4/conf/all/rp_filter echo 1 > /proc/sys/net/ipv4/conf/all/log_martians dmesg | grep -A 1 "192.168.103.190" -> doesn't show any IP Multicast dropped but I can see it in a modified debug output of the PTP deamon (ptp4l) than I only get RX-frames with rp_filter = 0. It seems that for running PTP-Services, I need to have rp_filter = 0 at least at the network interfaces which are used for PTP. So far I'm not sure what's the best way to have connman doing this for me. Perhaps having the possibility to set rp_filter on each interface instead of all, then set --nodevice on my PTP interfaces? Since I'm not an expert in this field (and connman), your opinion would be very helpful. Appreciate your help, thanks Urs _______________________________________________ connman mailing list connman@connman.net https://lists.connman.net/mailman/listinfo/connman
