Canbus interfaces

[rhysmorgan134]

Hi,

Great project all! I was hoping to use this to get a list of canbus interfaces that are present on a machine that's running socketcan. These interfaces are listed under ifconfig so I would have thought the logical place for them to sit would be under network interfaces. Is this likely to be a possibility?

Thanks

Rhys

[sebhildebrandt]

@rhysmorgan134 can you provide an output of what ifconfig then returns ... as I do not have can bus interfaces here ...? Thank you in advance...

[rhysmorgan134]

Sorry I should of included that, output of ifconfig below

ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.155.129  netmask 255.255.255.0  broadcast 172.16.155.255
        inet6 fe80::c7c3:938:22c4:6b41  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:4c:43:78  txqueuelen 1000  (Ethernet)
        RX packets 667930  bytes 981224811 (981.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 47951  bytes 5095350 (5.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 2745  bytes 1231219 (1.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2745  bytes 1231219 (1.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vcan0: flags=193<UP,RUNNING,NOARP>  mtu 72
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 1000  (UNSPEC)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Also ip a returns

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:4c:43:78 brd ff:ff:ff:ff:ff:ff
    altname enp2s1
    inet 172.16.155.129/24 brd 172.16.155.255 scope global dynamic noprefixroute ens33
       valid_lft 1639sec preferred_lft 1639sec
    inet6 fe80::c7c3:938:22c4:6b41/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: vcan0: <NOARP,UP,LOWER_UP> mtu 72 qdisc noqueue state UNKNOWN group default qlen 1000
    link/can 

If can-utils is installed then a virtual canbus can be created using the below

sudo modprobe vcan
sudo ip link add dev vcan0 type vcan
sudo ip link set up vcan0

[sebhildebrandt]

@rhysmorgan134 THANK YOU! This helps a lot. Will think of an implementation for that!