cfg80211_testmode_alloc_reply_skb — allocate testmode reply
struct sk_buff * cfg80211_testmode_alloc_reply_skb ( | struct wiphy * wiphy, |
int approxlen); |
wiphythe wiphy
approxlenan upper bound of the length of the data that will be put into the skb
This function allocates and pre-fills an skb for a reply to
the testmode command. Since it is intended for a reply, calling
it outside of the testmode_cmd operation is invalid.
The returned skb (or NULL if any errors happen) is pre-filled
with the wiphy index and set up in a way that any data that is
put into the skb (with skb_put, nla_put or similar) will end
up being within the NL80211_ATTR_TESTDATA attribute, so all that
needs to be done with the skb is adding data for the corresponding
userspace tool which can then read that data out of the testdata
attribute. You must not modify the skb in any other way.
When done, call cfg80211_testmode_reply with the skb and return
its error code as the result of the testmode_cmd operation.