94 lines
2.8 KiB
Diff
94 lines
2.8 KiB
Diff
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Add auto parameter to set distance command in order to enable ACK timeout
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estimation algorithm (dynack). Dynack is automatically disabled setting valid
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value for coverage class. Currently dynack is supported just by ath9k
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This patch is based on "configure dynack through mac80211/cfg80211 stack"
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patchset sent on linux-wireless
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Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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---
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info.c | 2 ++
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nl80211.h | 12 ++++++++++++
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phy.c | 43 +++++++++++++++++++++++++------------------
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3 files changed, 39 insertions(+), 18 deletions(-)
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--- a/info.c
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+++ b/info.c
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@@ -551,6 +551,8 @@ broken_combination:
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printf("\tDevice supports scan flush.\n");
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if (features & NL80211_FEATURE_AP_SCAN)
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printf("\tDevice supports AP scan.\n");
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+ if (features & NL80211_FEATURE_ACKTO_ESTIMATION)
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+ printf("\tDevice supports ACK timeout estimation.\n");
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}
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if (tb_msg[NL80211_ATTR_TDLS_SUPPORT])
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--- a/phy.c
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+++ b/phy.c
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@@ -362,39 +362,46 @@ static int handle_distance(struct nl8021
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int argc, char **argv,
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enum id_input id)
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{
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- char *end;
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- unsigned int distance, coverage;
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-
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if (argc != 1)
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return 1;
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if (!*argv[0])
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return 1;
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- distance = strtoul(argv[0], &end, 10);
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+ if (strcmp("auto", argv[0]) == 0) {
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+ NLA_PUT_FLAG(msg, NL80211_ATTR_WIPHY_DYN_ACK);
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+ } else {
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+ char *end;
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+ unsigned int distance, coverage;
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- if (*end)
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- return 1;
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+ distance = strtoul(argv[0], &end, 10);
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- /*
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- * Divide double the distance by the speed of light in m/usec (300) to
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- * get round-trip time in microseconds and then divide the result by
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- * three to get coverage class as specified in IEEE 802.11-2007 table
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- * 7-27. Values are rounded upwards.
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- */
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- coverage = (distance + 449) / 450;
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- if (coverage > 255)
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- return 1;
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+ if (*end)
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+ return 1;
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+
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+ /*
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+ * Divide double the distance by the speed of light
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+ * in m/usec (300) to get round-trip time in microseconds
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+ * and then divide the result by three to get coverage class
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+ * as specified in IEEE 802.11-2007 table 7-27.
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+ * Values are rounded upwards.
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+ */
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+ coverage = (distance + 449) / 450;
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+ if (coverage > 255)
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+ return 1;
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- NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
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+ NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
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+ }
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return 0;
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nla_put_failure:
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return -ENOBUFS;
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}
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-COMMAND(set, distance, "<distance>",
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+COMMAND(set, distance, "<auto|distance>",
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NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_distance,
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- "Set appropriate coverage class for given link distance in meters.\n"
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+ "Enable ACK timeout estimation algorithm (dynack) or set appropriate\n"
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+ "coverage class for given link distance in meters.\n"
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+ "To disable dynack set valid value for coverage class.\n"
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"Valid values: 0 - 114750");
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static int handle_txpower(struct nl80211_state *state,
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