wmifinfo/nwn.c

   1
   2 /*
   3  * This code reads the /proc/driver/poldhu/eth# file for the No Wires Needed poldhu
   4  * cards. Since there seems to be no official range for the 'Quality' value I assume
   5  * it's between 0 and 15, and multiply by 4 to get the range 0-63...
   6  *
   7  */
   8
   9 #ifdef ENABLE_NWN_SUPPORT
  10
  11 #include <stdio.h>
  12 #include <string.h>
  13
  14 #define POLDHUPATH "/proc/driver/poldhu/%s"
  15 #define SWALLOWPATH "/proc/driver/swallow/%s"
  16
  17 int nwn_get_link(char *ifname)
  18 {
  19         FILE *f;
  20         char buf[256];
  21         char *key, *val;
  22         char *p;
  23         char bssid[32] = "";
  24         int inbssid = 0;
  25         int link = 0;
  26
  27         sprintf(buf, POLDHUPATH, ifname);
  28         f = fopen(buf, "r");
  29
  30         if(f == NULL) {
  31                 sprintf(buf, SWALLOWPATH, ifname);
  32                 f  = fopen(buf, "r");
  33         }
  34
  35         if(f == NULL) {
  36                 return(0);
  37         }
  38
  39         while(fgets(buf, sizeof(buf), f)) {
  40                 p = strchr(buf, '\n');
  41                 if(p) *p=0;
  42
  43                 p = strchr(buf, ':');
  44
  45                 if(p) {
  46                         *p=0;
  47                         key = buf;
  48                         val = p+2;
  49                         p--;
  50                         while((*p == ' ') || (*p == '\t')) {
  51                                 *p=0;
  52                                 p--;
  53                         }
  54
  55                         if(strcmp(key, "Current BSSID") == 0) {
  56                                 strcpy(bssid, val);
  57                         }
  58
  59                         if((strcmp(key, "BSSID") == 0) &&
  60                            (strcmp(val, bssid) == 0)) {
  61                                 inbssid = 1;
  62                         }
  63
  64                         if((inbssid == 1) &&
  65                            (strcmp(key, "Quality") == 0)) {
  66                                 sscanf(val, "%X", &link);
  67                                 link *= 4;
  68                                 inbssid = 0;
  69                         }
  70                 }
  71         }
  72
  73         fclose(f);
  74
  75         return(link);
  76 }
  77
  78 #endif