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  * $Id: nwn.c,v 1.2 2002/09/15 14:31:41 ico Exp $
   8  *
   9  */
  10
  11 #ifdef ENABLE_NWN_SUPPORT
  12
  13 #include <stdio.h>
  14 #include <string.h>
  15
  16 #define POLDHUPATH "/proc/driver/poldhu/%s"
  17 #define SWALLOWPATH "/proc/driver/swallow/%s"
  18
  19 int nwn_get_link(char *ifname)
  20 {
  21         FILE *f;
  22         char buf[256];
  23         char *key, *val;
  24         char *p;
  25         char bssid[32] = "";
  26         int inbssid = 0;
  27         int link = 0;
  28
  29         sprintf(buf, POLDHUPATH, ifname);
  30         f = fopen(buf, "r");
  31
  32         if(f == NULL) {
  33                 sprintf(buf, SWALLOWPATH, ifname);
  34                 f  = fopen(buf, "r");
  35         }
  36
  37         if(f == NULL) {
  38                 return(0);
  39         }
  40
  41         while(fgets(buf, sizeof(buf), f)) {
  42                 p = strchr(buf, '\n');
  43                 if(p) *p=0;
  44
  45                 p = strchr(buf, ':');
  46
  47                 if(p) {
  48                         *p=0;
  49                         key = buf;
  50                         val = p+2;
  51                         p--;
  52                         while((*p == ' ') || (*p == '\t')) {
  53                                 *p=0;
  54                                 p--;
  55                         }
  56
  57                         if(strcmp(key, "Current BSSID") == 0) {
  58                                 strcpy(bssid, val);
  59                         }
  60
  61                         if((strcmp(key, "BSSID") == 0) &&
  62                            (strcmp(val, bssid) == 0)) {
  63                                 inbssid = 1;
  64                         }
  65
  66                         if((inbssid == 1) &&
  67                            (strcmp(key, "Quality") == 0)) {
  68                                 sscanf(val, "%X", (unsigned int *) &link);
  69                                 link *= 4;
  70                                 inbssid = 0;
  71                         }
  72                 }
  73         }
  74
  75         fclose(f);
  76
  77         return(link);
  78 }
  79
  80 #endif