| cfg80211_testmode_alloc_reply_skb(9) - phpMan
CFG80211_TESTMODE_AL(9) Test mode CFG80211_TESTMODE_AL(9)
NAME
cfg80211_testmode_alloc_reply_skb - allocate testmode reply
SYNOPSIS
struct sk_buff * cfg80211_testmode_alloc_reply_skb(struct wiphy * wiphy, int approxlen);
ARGUMENTS
wiphy
the wiphy
approxlen
an upper bound of the length of the data that will be put into the skb
DESCRIPTION
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 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.
RETURN
An allocated and pre-filled skb. NULL if any errors happen.
AUTHOR
Johannes Berg <johannes AT sipsolutions.net>
Author.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 CFG80211_TESTMODE_AL(9)
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