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-rw-r--r--src/print_wireless_info.c239
1 files changed, 163 insertions, 76 deletions
diff --git a/src/print_wireless_info.c b/src/print_wireless_info.c
index f67626b..50cf8e4 100644
--- a/src/print_wireless_info.c
+++ b/src/print_wireless_info.c
@@ -1,9 +1,6 @@
// vim:ts=8:expandtab
#include <stdio.h>
-#include <stdlib.h>
#include <string.h>
-#include <ctype.h>
-#include <limits.h>
#ifdef LINUX
#include <iwlib.h>
@@ -11,85 +8,146 @@
#include "i3status.h"
-#ifdef LINUX
-static int skfd = -1;
+#define WIRELESS_INFO_FLAG_HAS_ESSID (1 << 0)
+#define WIRELESS_INFO_FLAG_HAS_QUALITY (1 << 1)
+#define WIRELESS_INFO_FLAG_HAS_SIGNAL (1 << 2)
+#define WIRELESS_INFO_FLAG_HAS_NOISE (1 << 3)
+
+#define PERCENT_VALUE(value, total) ((int)(value * 100 / (float)total + 0.5f))
+
+typedef struct {
+ int flags;
+ char essid[IW_ESSID_MAX_SIZE + 1];
+ int quality;
+ int quality_max;
+ int quality_average;
+ int signal_level;
+ int signal_level_max;
+ int noise_level;
+ int noise_level_max;
+} wireless_info_t;
+
+static int get_wireless_info(const char *interface, wireless_info_t *info) {
+ memset(info, 0, sizeof(wireless_info_t));
-static int open_skfd() {
- if (skfd == -1) {
- skfd = iw_sockets_open();
+#ifdef LINUX
+ int skfd = iw_sockets_open();
if (skfd < 0) {
- perror("iw_sockets_open");
+ perror("iw_sockets_open");
+ return 0;
+ }
+
+ wireless_config wcfg;
+ if (iw_get_basic_config(skfd, interface, &wcfg) < 0) {
+ perror("iw_get_basic_config");
return 0;
}
- }
- return -1;
-}
-static void close_skfd() {
- if (skfd != -1) {
- close(skfd);
- skfd = -1;
- }
-}
-#endif
+ if (wcfg.has_essid && wcfg.essid_on) {
+ info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
+ strncpy(&info->essid[0], wcfg.essid, IW_ESSID_MAX_SIZE);
+ info->essid[IW_ESSID_MAX_SIZE] = '\0';
+ }
-const char *get_wireless_essid(const char *interface) {
- static char part[512];
- part[0] = '\0';
-#ifdef LINUX
- if (open_skfd()) {
- wireless_config wcfg;
- if (iw_get_basic_config(skfd, interface, &wcfg) >= 0)
- snprintf(part, sizeof(part), "%s", wcfg.essid);
- }
-#endif
- return part;
-}
+ /* Wireless quality is a relative value in a driver-specific range.
+ Signal and noise level can be either relative or absolute values
+ in dBm. Furthermore, noise and quality can be expressed directly
+ in dBm or in RCPI (802.11k), which we convert to dBm. When those
+ values are expressed directly in dBm, they range from -192 to 63,
+ and since the values are packed into 8 bits, we need to perform
+ 8-bit arithmetic on them. Assume absolute values if everything
+ else fails (driver bug). */
-int get_wireless_quality_max(const char *interface) {
-#ifdef LINUX
- if (open_skfd()) {
iwrange range;
- if (iw_get_range_info(skfd, interface, &range) >= 0)
- return range.max_qual.qual;
- }
+ 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;
#endif
- return 0;
}
-/*
- * Just parses /proc/net/wireless looking for lines beginning with
- * wlan_interface, extracting the quality of the link and adding the
- * current IP address of wlan_interface.
- *
- */
void print_wireless_info(const char *interface, const char *format_up, const char *format_down) {
- char buf[1024];
- int quality = 0;
- char *interfaces;
const char *walk;
- memset(buf, 0, sizeof(buf));
-
- if (!slurp("/proc/net/wireless", buf, sizeof(buf)))
- die("Could not open \"/proc/net/wireless\"\n");
-
- interfaces = skip_character(buf, '\n', 1) + 1;
- while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
- while (isspace((int)*interfaces))
- interfaces++;
- if (!BEGINS_WITH(interfaces, interface))
- continue;
- if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
- continue;
- break;
+ wireless_info_t info;
+ if (get_wireless_info(interface, &info)) {
+ walk = format_up;
+ if (info.flags & WIRELESS_INFO_FLAG_HAS_QUALITY)
+ printf("%s", info.quality < info.quality_average ? color("#FFFF00") : color("#00FF00"));
}
-
- if ((quality == UCHAR_MAX) || (quality == 0)) {
+ else {
walk = format_down;
printf("%s", color("#FF0000"));
- } else {
- printf("%s", color("#00FF00"));
- walk = format_up;
}
for (; *walk != '\0'; walk++) {
@@ -99,16 +157,49 @@ void print_wireless_info(const char *interface, const char *format_up, const cha
}
if (BEGINS_WITH(walk+1, "quality")) {
- int max_qual = get_wireless_quality_max(interface);
- if (max_qual && max_qual >= quality)
- printf("%03d%%", (int)(quality * (100.0 / max_qual)));
- else
- printf("%d dBm", quality);
+ if (info.flags & WIRELESS_INFO_FLAG_HAS_QUALITY) {
+ if (info.quality_max)
+ printf("%03d%%", PERCENT_VALUE(info.quality, info.quality_max));
+ else
+ printf("%d", info.quality);
+ }
+ else {
+ printf("no value");
+ }
walk += strlen("quality");
}
+ if (BEGINS_WITH(walk+1, "signal")) {
+ if (info.flags & WIRELESS_INFO_FLAG_HAS_SIGNAL) {
+ if (info.signal_level_max)
+ printf("%03d%%", PERCENT_VALUE(info.signal_level, info.signal_level_max));
+ else
+ printf("%d dBm", info.signal_level);
+ }
+ else {
+ printf("no value");
+ }
+ walk += strlen("signal");
+ }
+
+ if (BEGINS_WITH(walk+1, "noise")) {
+ if (info.flags & WIRELESS_INFO_FLAG_HAS_NOISE) {
+ if (info.noise_level_max)
+ printf("%03d%%", PERCENT_VALUE(info.noise_level, info.noise_level_max));
+ else
+ printf("%d dBm", info.noise_level);
+ }
+ else {
+ printf("no value");
+ }
+ walk += strlen("noise");
+ }
+
if (BEGINS_WITH(walk+1, "essid")) {
- (void)printf("%s", get_wireless_essid(interface));
+ if (info.flags & WIRELESS_INFO_FLAG_HAS_ESSID)
+ printf("%s", info.essid);
+ else
+ printf("no value");
walk += strlen("essid");
}
@@ -121,9 +212,5 @@ void print_wireless_info(const char *interface, const char *format_up, const cha
}
}
-#ifdef LINUX
- close_skfd();
-#endif
-
(void)printf("%s", endcolor());
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 03:37:11 +0000