Receiving a netlink message

• Fill a buffer using recvmsg() from a netlink socket.

• First nlmsghdr is beginning of buffer.

• Check if it is not truncated using NLMSG_OK

• Check the type and it you're interested in it get the payload using NLMSG_DATA. For rtnetlink don't forget the rta attributes.

• Get next message using NLMSG_NEXT