Evaluate wireless quality average. Fix dBm calculations.
This commit is contained in:
Fernando Tarlá Cardoso Lemos
Michael Stapelberg
parent
28ba2ae892
commit
1e0ad8d251
|
|
@ -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)
|
||||
|
||||
static int open_skfd() {
|
||||
if (skfd == -1) {
|
||||
skfd = iw_sockets_open();
|
||||
#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));
|
||||
|
||||
#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
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
#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;
|
||||
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';
|
||||
}
|
||||
|
||||
if ((quality == UCHAR_MAX) || (quality == 0)) {
|
||||
/* 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). */
|
||||
|
||||
iwrange range;
|
||||
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
|
||||
}
|
||||
|
||||
void print_wireless_info(const char *interface, const char *format_up, const char *format_down) {
|
||||
const char *walk;
|
||||
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"));
|
||||
}
|
||||
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());
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue