Add auto parameter to set distance command in order to enable ack timeout
estimation algorithm (dynack). Currently dynack is supported just by ath9k
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@xxxxxxxxx>
---
nl80211.h | 5 +++++
phy.c | 44 +++++++++++++++++++++++++-------------------
2 files changed, 30 insertions(+), 19 deletions(-)
diff --git a/nl80211.h b/nl80211.h
index f1db15b..7cc5ecd 100644
--- a/nl80211.h
+++ b/nl80211.h
@@ -1594,6 +1594,9 @@ enum nl80211_commands {
* @NL80211_ATTR_TDLS_INITIATOR: flag attribute indicating the current end is
* the TDLS link initiator.
*
+ * @NL80211_ATTR_WIPHY_DYNACK: whether dynamic ack timeout estimation algorithm
+ * is enabled
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -1936,6 +1939,8 @@ enum nl80211_attrs {
NL80211_ATTR_TDLS_INITIATOR,
+ NL80211_ATTR_WIPHY_DYNACK,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
diff --git a/phy.c b/phy.c
index 517d203..068f9fc 100644
--- a/phy.c
+++ b/phy.c
@@ -362,40 +362,46 @@ static int handle_distance(struct nl80211_state *state,
int argc, char **argv,
enum id_input id)
{
- char *end;
- unsigned int distance, coverage;
-
if (argc != 1)
return 1;
if (!*argv[0])
return 1;
- distance = strtoul(argv[0], &end, 10);
+ if (strcmp("auto", argv[0]) == 0) {
+ NLA_PUT_FLAG(msg, NL80211_ATTR_WIPHY_DYNACK);
+ } else {
+ char *end;
+ unsigned int distance, coverage;
- if (*end)
- return 1;
+ distance = strtoul(argv[0], &end, 10);
- /*
- * Divide double the distance by the speed of light in m/usec (300) to
- * get round-trip time in microseconds and then divide the result by
- * three to get coverage class as specified in IEEE 802.11-2007 table
- * 7-27. Values are rounded upwards.
- */
- coverage = (distance + 449) / 450;
- if (coverage > 255)
- return 1;
+ if (*end)
+ return 1;
- NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
+ /*
+ * Divide double the distance by the speed of light
+ * in m/usec (300) to get round-trip time in microseconds
+ * and then divide the result by three to get coverage class
+ * as specified in IEEE 802.11-2007 table 7-27.
+ * Values are rounded upwards.
+ */
+ coverage = (distance + 449) / 450;
+ if (coverage > 255)
+ return 1;
+
+ NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
+ }
return 0;
nla_put_failure:
return -ENOBUFS;
}
-COMMAND(set, distance, "<distance>",
+COMMAND(set, distance, "<auto|distance>",
NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_distance,
- "Set appropriate coverage class for given link distance in meters.\n"
- "Valid values: 0 - 114750");
+ "Enable ack timeout estimation algorithm or set appropriate\n"
+ "coverage class for given link distance in meters.\n"
+ "Valid values for coverage class: 0 - 114750");
static int handle_txpower(struct nl80211_state *state,
struct nl_cb *cb,
--
1.9.1
--
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