Function libcoap_sys::coap_join_mcast_group

pub unsafe extern "C" fn coap_join_mcast_group(
    ctx: *mut coap_context_t, 
    groupname: *const c_char
) -> c_int

Function interface for joining a multicast group for listening

@param ctx The current context @param groupname The name of the group that is to be joined for listening

@return 0 on success, -1 on error