+ if (iw_get_range_info(skfd, interface, &range) < 0) {
+ close(skfd);
+ return 0;
+ }
+
+ iwstats stats;
+ if (iw_get_stats(skfd, interface, &stats, &range, 1) < 0) {
+ close(skfd);
+ return 0;
+ }
+
+ if (stats.qual.level != 0 || (stats.qual.updated & (IW_QUAL_DBM | IW_QUAL_RCPI))) {
+ if (!(stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
+ info->quality = stats.qual.qual;
+ info->quality_max = range.max_qual.qual;
+ info->quality_average = range.avg_qual.qual;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_QUALITY;
+ }
+
+ if (stats.qual.updated & IW_QUAL_RCPI) {
+ if (!(stats.qual.updated & IW_QUAL_LEVEL_INVALID)) {
+ info->signal_level = stats.qual.level / 2.0 - 110 + 0.5;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
+ }
+ if (!(stats.qual.updated & IW_QUAL_NOISE_INVALID)) {
+ info->noise_level = stats.qual.noise / 2.0 - 110 + 0.5;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_NOISE;
+ }
+ }
+ else {
+ if ((stats.qual.updated & IW_QUAL_DBM) || stats.qual.level > range.max_qual.level) {
+ if (!(stats.qual.updated & IW_QUAL_LEVEL_INVALID)) {
+ info->signal_level = stats.qual.level;
+ if (info->signal_level > 63)
+ info->signal_level -= 256;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
+ }
+ if (!(stats.qual.updated & IW_QUAL_NOISE_INVALID)) {
+ info->noise_level = stats.qual.noise;
+ if (info->noise_level > 63)
+ info->noise_level -= 256;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_NOISE;
+ }
+ }
+ else {
+ if (!(stats.qual.updated & IW_QUAL_LEVEL_INVALID)) {
+ info->signal_level = stats.qual.level;
+ info->signal_level_max = range.max_qual.level;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
+ }
+ if (!(stats.qual.updated & IW_QUAL_NOISE_INVALID)) {
+ info->noise_level = stats.qual.noise;
+ info->noise_level_max = range.max_qual.noise;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_NOISE;
+ }
+ }
+ }
+ }
+ else {
+ if (!(stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
+ info->quality = stats.qual.qual;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_QUALITY;
+ }
+ if (!(stats.qual.updated & IW_QUAL_LEVEL_INVALID)) {
+ info->quality = stats.qual.level;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
+ }
+ if (!(stats.qual.updated & IW_QUAL_NOISE_INVALID)) {
+ info->quality = stats.qual.noise;
+ info->flags |= WIRELESS_INFO_FLAG_HAS_NOISE;
+ }
+ }
+
+ close(skfd);
+ return 1;