Hi, I think the documentation for genl_send_simple http://www.infradead.org/~tgr/libnl/doc/api/group__genl.html#ga6a58e94186e70ab8dfa1a5c1d9d91f9d is incorrect about the return value. It says "0 on success or a negative error code." But should be "Number of characters sent on success or a negative error code." Right? -- Thanks, Xiao Jia