463f321316
since IFF_DOWN is only used for request, not for status. Instead, IFF_UP should be used to query the netdev status. The IFF_DOWN related macros are also removed to avoid the confuse. Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This will eventually hold some general documentation for the IEEE 802.15.4 MAC implementation. NOTE: Throughout the code, excerpts from the standard are quoted as to make the code thoroughly readable. I have tried, to always put a reference [1] and page number. Below is the references that correspond with the reference number [1]