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// vim:ts=8:expandtab
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#ifdef LINUX
#include <iwlib.h>
#endif
#include "i3status.h"
#ifdef LINUX
static int skfd = -1;
static int open_skfd() {
if (skfd == -1) {
skfd = iw_sockets_open();
if (skfd < 0) {
perror("iw_sockets_open");
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 ((quality == UCHAR_MAX) || (quality == 0)) {
walk = format_down;
printf("%s", color("#FF0000"));
} else {
printf("%s", color("#00FF00"));
walk = format_up;
}
for (; *walk != '\0'; walk++) {
if (*walk != '%') {
putchar(*walk);
continue;
}
if (BEGINS_WITH(walk+1, "quality")) {
int max_qual = get_wireless_quality_max(interface);
if (max_qual && max_qual >= quality)
printf("%d%%", (int)(quality * (100.0 / max_qual)));
else
printf("%d", quality);
walk += strlen("quality");
}
if (BEGINS_WITH(walk+1, "essid")) {
(void)printf("%s", get_wireless_essid(interface));
walk += strlen("essid");
}
if (BEGINS_WITH(walk+1, "ip")) {
const char *ip_address = get_ip_addr(interface);
if (ip_address != NULL)
(void)printf("%s", get_ip_addr(interface));
else (void)printf("no IP");
walk += strlen("ip");
}
}
#ifdef LINUX
close_skfd();
#endif
(void)printf("%s", endcolor());
}
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