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authorJohannes Berg <johannes.berg@intel.com>2011-11-09 10:15:42 +0100
committerJohn W. Linville <linville@tuxdriver.com>2011-11-09 16:01:02 -0500
commit6e3e939f3b1bf8534b32ad09ff199d88800835a0 (patch)
tree78ec0638efbade2fdb0bebb7bad71410ded2e6c6 /arch/xtensa/include
parent4fdbff0770bea059621bc4906fb7c7f5879f3ae1 (diff)
downloadlinux-6e3e939f3b1bf8534b32ad09ff199d88800835a0.tar.gz
net: add wireless TX status socket option
The 802.1X EAPOL handshake hostapd does requires knowing whether the frame was ack'ed by the peer. Currently, we fudge this pretty badly by not even transmitting the frame as a normal data frame but injecting it with radiotap and getting the status out of radiotap monitor as well. This is rather complex, confuses users (mon.wlan0 presence) and doesn't work with all hardware. To get rid of that hack, introduce a real wifi TX status option for data frame transmissions. This works similar to the existing TX timestamping in that it reflects the SKB back to the socket's error queue with a SCM_WIFI_STATUS cmsg that has an int indicating ACK status (0/1). Since it is possible that at some point we will want to have TX timestamping and wifi status in a single errqueue SKB (there's little point in not doing that), redefine SO_EE_ORIGIN_TIMESTAMPING to SO_EE_ORIGIN_TXSTATUS which can collect more than just the timestamp; keep the old constant as an alias of course. Currently the internal APIs don't make that possible, but it wouldn't be hard to split them up in a way that makes it possible. Thanks to Neil Horman for helping me figure out the functions that add the control messages. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'arch/xtensa/include')
-rw-r--r--arch/xtensa/include/asm/socket.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/socket.h b/arch/xtensa/include/asm/socket.h
index cbdf2ffaacf..bb06968be22 100644
--- a/arch/xtensa/include/asm/socket.h
+++ b/arch/xtensa/include/asm/socket.h
@@ -73,4 +73,7 @@
#define SO_RXQ_OVFL 40
+#define SO_WIFI_STATUS 41
+#define SCM_WIFI_STATUS SO_WIFI_STATUS
+
#endif /* _XTENSA_SOCKET_H */