New nl80211 attribute NL80211_ATTR_WIPHY_COVERAGE_CLASS allows setting
IEEE 802.11 coverage class, which is then used by drivers to calculate
slot time and ACK timeout for long distance links.
Two iw parameters are added: 'coverage' sets the coverage class
directly, while 'distance' is more user-friendly, as it allows to set
just the link distance and let iw do the necessary calculation itself.
Signed-off-by: Lukas Turek 8...@praha12.net
---
info.c|8
nl80211.h | 15 +++
phy.c | 58 ++
3 files changed, 81 insertions(+), 0 deletions(-)
diff --git a/info.c b/info.c
index 69af216..1a1b588 100644
--- a/info.c
+++ b/info.c
@@ -156,6 +156,14 @@ static int print_phy_handler(struct nl_msg *msg, void *arg)
printf(\tRTS threshold: %d\n, rts);
}
+ if (tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
+ unsigned char coverage;
+
+ coverage =
nla_get_u8(tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
+ /* See handle_distance() for an explanation where the '450'
comes from */
+ printf(\tCoverage class: %d (up to %dm)\n, coverage, 450 *
coverage);
+ }
+
if (!tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES])
goto commands;
diff --git a/nl80211.h b/nl80211.h
index 45db17f..e241ed1 100644
--- a/nl80211.h
+++ b/nl80211.h
@@ -349,6 +349,10 @@ enum nl80211_commands {
NL80211_CMD_GET_SURVEY,
NL80211_CMD_NEW_SURVEY_RESULTS,
+ NL80211_CMD_SET_PMKSA,
+ NL80211_CMD_DEL_PMKSA,
+ NL80211_CMD_FLUSH_PMKSA,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -398,6 +402,8 @@ enum nl80211_commands {
* @NL80211_ATTR_WIPHY_RTS_THRESHOLD: RTS threshold (TX frames with length
* larger than or equal to this use RTS/CTS handshake); allowed range:
* 0..65536, disable with (u32)-1; dot11RTSThreshold; u32
+ * @NL80211_ATTR_WIPHY_COVERAGE_CLASS: Coverage Class as defined by IEEE 802.11
+ * section 7.3.2.9; dot11CoverageClass; u8
*
* @NL80211_ATTR_IFINDEX: network interface index of the device to operate on
* @NL80211_ATTR_IFNAME: network interface name
@@ -598,6 +604,10 @@ enum nl80211_commands {
* the survey response for %NL80211_CMD_GET_SURVEY, nested attribute
* containing info as possible, see enum survey_info.
*
+ * @NL80211_ATTR_PMKID: PMK material for PMKSA caching.
+ * @NL80211_ATTR_MAX_NUM_PMKIDS: maximum number of PMKIDs a firmware can
+ * cache, a wiphy attribute.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -732,6 +742,11 @@ enum nl80211_attrs {
NL80211_ATTR_SURVEY_INFO,
+ NL80211_ATTR_PMKID,
+ NL80211_ATTR_MAX_NUM_PMKIDS,
+
+ NL80211_ATTR_WIPHY_COVERAGE_CLASS,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
diff --git a/phy.c b/phy.c
index 8dd01aa..1de58a9 100644
--- a/phy.c
+++ b/phy.c
@@ -164,3 +164,61 @@ static int handle_netns(struct nl80211_state *state,
COMMAND(set, netns, pid,
NL80211_CMD_SET_WIPHY_NETNS, 0, CIB_PHY, handle_netns,
Put this wireless device into a different network namespace);
+
+static int handle_coverage(struct nl80211_state *state,
+ struct nl_cb *cb,
+ struct nl_msg *msg,
+ int argc, char **argv)
+{
+ unsigned int coverage;
+
+ if (argc != 1)
+ return 1;
+
+ coverage = strtoul(argv[0], NULL, 10);
+ if (coverage 255)
+ return 1;
+
+ NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
+
+ return 0;
+ nla_put_failure:
+ return -ENOBUFS;
+}
+COMMAND(set, coverage, coverage class,
+ NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_coverage,
+ Set coverage class (1 for every 3 usec of air propagation time).\n
+ Valid values: 0 - 255.);
+
+static int handle_distance(struct nl80211_state *state,
+ struct nl_cb *cb,
+ struct nl_msg *msg,
+ int argc, char **argv)
+{
+ unsigned int distance, coverage;
+
+ if (argc != 1)
+ return 1;
+
+ distance = strtoul(argv[0], NULL, 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;
+
+ NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
+
+ return 0;
+ nla_put_failure:
+ return -ENOBUFS;
+}
+COMMAND(set, distance, distance,
+
