tests/wlstat.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <pthread.h>
   4 #include <time.h>
   5
   6 #define ts_add_nsec(ts, ns) { \
   7   ts.tv_nsec += ns; \
   8   if (ts.tv_nsec >= 1000000000) { \
   9     ts.tv_sec++; \
  10     ts.tv_nsec -= 1000000000; \
  11   } \
  12 }
  13
  14 static FILE *open_wl_stats(void)
  15 {
  16         char buf[256];
  17         FILE *f;
  18         int i;
  19
  20         for (i = 0; i < 100; i++) {
  21                 snprintf(buf, sizeof(buf),
  22                          "/sys/class/ieee80211/phy%d/device/wl_stats", i);
  23                 f = fopen(buf, "r");
  24                 if (f != NULL)
  25                         break;
  26         }
  27
  28         if (f == NULL)
  29                 perror("open wl_stats");
  30
  31         return f;
  32 }
  33
  34 #define VALS 8
  35 static const char *names[VALS] = {
  36         "fcs_err", "plcp_er", "seq_err", "  valid",
  37         "  retry", "  touts", "oth_err", "   reqs"
  38 };
  39 static const unsigned char need_diff[VALS] = { 0, 0, 1, 0, 1, 1, 1, 1 };
  40
  41 static int get_vals(FILE *f, unsigned int *vals)
  42 {
  43         return fscanf(f, "%u %u %u %u %u %u %u %u\n",
  44                 &vals[0], &vals[1], &vals[2], &vals[3],
  45                 &vals[4], &vals[5], &vals[6], &vals[7]);
  46 }
  47
  48 int main(int argc, char *argv[])
  49 {
  50         pthread_mutex_t dummy_mutex = PTHREAD_MUTEX_INITIALIZER;
  51         pthread_cond_t dummy_cond = PTHREAD_COND_INITIALIZER;
  52         unsigned int vals[VALS], vals_old[VALS];
  53         struct timespec ts;
  54         int l, i, ret;
  55         FILE *f;
  56
  57         f = open_wl_stats();
  58         if (f == NULL)
  59                 return 1;
  60
  61         // initial read
  62         get_vals(f, vals_old);
  63
  64         clock_gettime(CLOCK_REALTIME, &ts);
  65
  66         for (l = 0; ; l++)
  67         {
  68                 rewind(f);
  69                 ret = get_vals(f, vals);
  70                 if (ret != VALS) {
  71                         fprintf(stderr, "scan error (%d)\n", ret);
  72                         return 1;
  73                 }
  74
  75                 if (l % 25 == 0) {
  76                         // printf("-------------  rx  ------------- ------------  tx  -------------\n");
  77                         for (i = 0; i < VALS; i++)
  78                                 printf("%s ", names[i]);
  79                         printf("\n");
  80                 }
  81
  82                 for (i = 0; i < VALS; i++)
  83                         printf("%7u ", need_diff[i] ? (vals[i] - vals_old[i]) : vals[i]);
  84                 printf("\n");
  85                 fflush(stdout);
  86
  87                 memcpy(vals_old, vals, sizeof(vals_old));
  88
  89                 ts_add_nsec(ts, 1000000000);
  90                 pthread_mutex_lock(&dummy_mutex);
  91                 pthread_cond_timedwait(&dummy_cond, &dummy_mutex, &ts);
  92                 pthread_mutex_unlock(&dummy_mutex);
  93         }
  94
  95         fclose(f);
  96         return 0;
  97 }
  98