git.sur5r.net Git - i3/i3status/blob - src/print_wireless_info.c

   1 // vim:ts=8:expandtab
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <ctype.h>
   6 #include <limits.h>
   7
   8 #ifdef LINUX
   9 #include <iwlib.h>
  10 #endif
  11
  12 #include "i3status.h"
  13
  14 #ifdef LINUX
  15 static int skfd = -1;
  16
  17 static int open_skfd() {
  18     if (skfd == -1) {
  19         skfd = iw_sockets_open();
  20         if (skfd < 0) {
  21             perror("iw_sockets_open");
  22             return 0;
  23         }
  24     }
  25     return -1;
  26 }
  27
  28 static void close_skfd() {
  29     if (skfd != -1) {
  30         close(skfd);
  31         skfd = -1;
  32     }
  33 }
  34 #endif
  35
  36 const char *get_wireless_essid(const char *interface) {
  37     static char part[512];
  38     part[0] = '\0';
  39 #ifdef LINUX
  40     if (open_skfd()) {
  41         wireless_config wcfg;
  42         if (iw_get_basic_config(skfd, interface, &wcfg) >= 0)
  43             snprintf(part, sizeof(part), "%s", wcfg.essid);
  44     }
  45 #endif
  46     return part;
  47 }
  48
  49 int get_wireless_quality_max(const char *interface) {
  50 #ifdef LINUX
  51     if (open_skfd()) {
  52         iwrange range;
  53         if (iw_get_range_info(skfd, interface, &range) >= 0)
  54             return range.max_qual.qual;
  55     }
  56 #endif
  57     return 0;
  58 }
  59
  60 /*
  61  * Just parses /proc/net/wireless looking for lines beginning with
  62  * wlan_interface, extracting the quality of the link and adding the
  63  * current IP address of wlan_interface.
  64  *
  65  */
  66 void print_wireless_info(const char *interface, const char *format_up, const char *format_down) {
  67         char buf[1024];
  68         int quality = 0;
  69         char *interfaces;
  70         const char *walk;
  71         memset(buf, 0, sizeof(buf));
  72
  73         if (!slurp("/proc/net/wireless", buf, sizeof(buf)))
  74                 die("Could not open \"/proc/net/wireless\"\n");
  75
  76         interfaces = skip_character(buf, '\n', 1) + 1;
  77         while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
  78                 while (isspace((int)*interfaces))
  79                         interfaces++;
  80                 if (!BEGINS_WITH(interfaces, interface))
  81                         continue;
  82                 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
  83                         continue;
  84                 break;
  85         }
  86
  87         if ((quality == UCHAR_MAX) || (quality == 0)) {
  88                 walk = format_down;
  89                 printf("%s", color("#FF0000"));
  90         } else {
  91                 printf("%s", color("#00FF00"));
  92                 walk = format_up;
  93         }
  94
  95         for (; *walk != '\0'; walk++) {
  96                 if (*walk != '%') {
  97                         putchar(*walk);
  98                         continue;
  99                 }
 100
 101                 if (BEGINS_WITH(walk+1, "quality")) {
 102                         int max_qual = get_wireless_quality_max(interface);
 103                         if (max_qual && max_qual >= quality)
 104                                 printf("%03d%%", (int)(quality * (100.0 / max_qual)));
 105                         else
 106                                 printf("%d dBm", quality);
 107                         walk += strlen("quality");
 108                 }
 109
 110                 if (BEGINS_WITH(walk+1, "essid")) {
 111                         (void)printf("%s", get_wireless_essid(interface));
 112                         walk += strlen("essid");
 113                 }
 114
 115                 if (BEGINS_WITH(walk+1, "ip")) {
 116                         const char *ip_address = get_ip_addr(interface);
 117                         if (ip_address != NULL)
 118                                 (void)printf("%s", get_ip_addr(interface));
 119                         else (void)printf("no IP");
 120                         walk += strlen("ip");
 121                 }
 122         }
 123
 124 #ifdef LINUX
 125         close_skfd();
 126 #endif
 127
 128         (void)printf("%s", endcolor());
 129 }