Socketcand is a daemon that provides access to CAN interfaces on a machine via a network interface. The communication protocol uses a TCP/IP connection and a specific protocol to transfer CAN frames and control commands. The protocol specification can be found in ./doc/protocol.md.
To build and run socketcand make sure you have the following tools installed:
- meson
- gcc or another C compiler
- a kernel that includes the SocketCAN modules
- the headers for your kernel version
- the libconfig with headers (libconfig-dev under debian based systems)
- the libsocketcan with headers (libsocketcan-dev under debian based systems) is a requirement to configure the interfaces from socketcand
Execute the following commands to configure, build, and install the software:
$ meson setup -Dlibconfig=true --buildtype=release build
$ meson compile -C build
$ meson install -C build
The daemon uses a simple UDP beacon mechanism for service discovery. A beacon containing the service name, type and address is sent to the broadcast address (port 42000) at minimum every 3 seconds. A client only has to listen for messages of this type to detect all SocketCAN daemons in the local network.
socketcand [-v | --verbose] [-i interfaces | --interfaces interfaces]
[-p port | --port port] [-l interface | --listen interface]
[-u name | --afuxname name] [-n | --no-beacon] [-d | --daemon]
[-h | --help]
- -v (activates verbose output to STDOUT)
- -i interfaces (comma separated list of SocketCAN interfaces the daemon shall provide access to e.g. '-i can0,vcan1' - default: vcan0)
- -p port (changes the default port '29536' the daemon is listening at)
- -l interface (changes the default network interface the daemon will bind to - default: eth0)
- -u name (the AF_UNIX socket path - abstract name when leading '/' is missing) (N.B. the AF_UNIX binding will supersede the port/interface settings)
- -n (deactivates the discovery beacon)
- -d (set this flag if you want log to syslog instead of STDOUT)
- -h (prints this message)
The source code is released under either GPL-2.0-only or BSD-3-Clause licenses.