adding more metric reporting (#27)

Reviewed-on: #27

src/sysinfo.h

@@ -49,6 +49,7 @@ typedef struct {
     long long tx_errors;
     long long rx_dropped;
     long long tx_dropped;
+    long long rx_frame;
     long long rx_multicast;
 } iface_stats_t;
 
@@ -65,9 +66,33 @@ typedef struct {
     int  cu_self_rx;  /* % time spent receiving */
     int  num_sta;
     int  noise;       /* dBm */
+    int  nss;         /* usable spatial streams */
+    int  tx_antennas; /* configured TX chains */
+    int  rx_antennas; /* configured RX chains */
+    long long tx_packets;
+    long long tx_retries;
+    long long tx_failed;
+    long long tx_duration; /* microseconds */
+    long long rx_duration; /* microseconds */
 } radio_stats_t;
 
 /* iface: "wlan0", "wlan1" */
 int sysinfo_radio(const char *iface, radio_stats_t *out);
 
+#define MAX_SCAN_RESULTS 128
+
+typedef struct {
+    char bssid[32];
+    char essid[64];
+    int  frequency;
+    int  channel;
+    int  signal;       /* dBm */
+    int  rssi;         /* controller-compatible quality, 0-100 */
+    int  age;          /* seconds since last seen */
+    bool secured;
+} wifi_scan_t;
+
+/* Read the kernel's cached BSS list without starting a disruptive scan. */
+int sysinfo_wifi_scan_cache(const char *iface, wifi_scan_t *out, int max_out);
+
 #endif /* OPENUF_SYSINFO_H */