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-rw-r--r--package/iw/patches/100-coverage_class.patch81
1 files changed, 81 insertions, 0 deletions
diff --git a/package/iw/patches/100-coverage_class.patch b/package/iw/patches/100-coverage_class.patch
new file mode 100644
index 0000000000..8e18e038d6
--- /dev/null
+++ b/package/iw/patches/100-coverage_class.patch
@@ -0,0 +1,81 @@
+--- a/info.c
++++ b/info.c
+@@ -156,6 +156,14 @@ static int print_phy_handler(struct nl_m
+ 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;
+
+--- a/phy.c
++++ b/phy.c
+@@ -164,3 +164,61 @@ static int handle_netns(struct nl80211_s
+ 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>",
++ NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_distance,
++ "Set appropriate coverage class for given link distance in meters.\n"
++ "Valid values: 0 - 114750");