--- 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, "", 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, "", + 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, "", + NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_distance, + "Set appropriate coverage class for given link distance in meters.\n" + "Valid values: 0 - 114750");