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:

• autoconf
• make
• 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)

First run

$ autoconf

to create the 'configure' script.

Then run the created script with

$ ./configure

to check your system and create the Makefile. If you want to install scripts for a init system other than SysVinit check the available settings with './configure -h'. To compile and install the socketcand run

$ make
$ make install

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 ip_addr | --listen interface] [-h | --help]

###Description of the options

• -v activates verbose output to STDOUT
• -i interfaces is used to specify the SocketCAN interfaces the daemon shall provide access to
• -p port changes the default port (29536) the daemon is listening at
• -l interface changes the default network interface (eth0) the daemon will bind to
• -h prints a help message