fixing the scan for the wifi

Author: chirag-silabs

examples/platform/silabs/SiWx917/SiWx917/sl_wifi_if.cpp

@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
+#include "silabs_utils.h"
 #if (SL_MATTER_GN_BUILD == 0)
 #include "sl_matter_wifi_config.h"
 #endif // SL_MATTER_GN_BUILD
@@ -43,6 +43,7 @@
 #include <lib/support/CHIPMemString.h>
 #include <lib/support/CodeUtils.h>
 #include <lib/support/logging/CHIPLogging.h>
+#include <platform/CHIPDeviceLayer.h>
 
 extern "C" {
 #include "sl_net.h"
@@ -543,27 +544,36 @@ sl_status_t show_scan_results(sl_wifi_scan_result_t * scan_result)
     {
         memset(&cur_scan_result, 0, sizeof(cur_scan_result));
 
-        cur_scan_result.ssid_length = strnlen((char *) scan_result->scan_info[idx].ssid,
-                                              chip::min<size_t>(sizeof(scan_result->scan_info[idx].ssid), WFX_MAX_SSID_LENGTH));
+        // cur_scan_result.ssid_length = strnlen((char *) scan_result->scan_info[idx].ssid,
+                                            //   chip::min<size_t>(sizeof(scan_result->scan_info[idx].ssid) + 1, WFX_MAX_SSID_LENGTH));
+        cur_scan_result.ssid_length = chip::min<size_t>(strnlen((char *) scan_result->scan_info[idx].ssid, chip::DeviceLayer::Internal::kMaxWiFiSSIDLength) + 1, chip::DeviceLayer::Internal::kMaxWiFiSSIDLength); // +1 for null termination
         chip::Platform::CopyString(cur_scan_result.ssid, cur_scan_result.ssid_length, (char *) scan_result->scan_info[idx].ssid);
 
+        SILABS_LOG("ssid : %s", cur_scan_result.ssid);
+        SILABS_LOG("scan ssid : %s", wfx_rsi.scan_ssid);
         // if user has provided ssid, then check if the current scan result ssid matches the user provided ssid
         if (wfx_rsi.scan_ssid != NULL &&
-            (strncmp(wfx_rsi.scan_ssid, cur_scan_result.ssid, MIN(strlen(wfx_rsi.scan_ssid), strlen(cur_scan_result.ssid))) ==
+            (strncmp(wfx_rsi.scan_ssid, cur_scan_result.ssid, MIN(strlen(wfx_rsi.scan_ssid), strlen(cur_scan_result.ssid))) !=
              CMP_SUCCESS))
         {
+            SILABS_LOG("%d",__LINE__);
             continue;
         }
         cur_scan_result.security = static_cast<wfx_sec_t>(scan_result->scan_info[idx].security_mode);
         cur_scan_result.rssi     = (-1) * scan_result->scan_info[idx].rssi_val;
         memcpy(cur_scan_result.bssid, scan_result->scan_info[idx].bssid, BSSID_LEN);
         wfx_rsi.scan_cb(&cur_scan_result);
+            SILABS_LOG("%d",__LINE__);
 
         // if user has not provided the ssid, then call the callback for each scan result
         if (wfx_rsi.scan_ssid == NULL)
         {
+            SILABS_LOG("%d",__LINE__);
+
             continue;
         }
+            SILABS_LOG("%d",__LINE__);
+
         break;
     }
 
@@ -604,7 +614,7 @@ static void wfx_rsi_save_ap_info(void) // translation
     sl_wifi_ssid_t ssid_arg;
     memset(&ssid_arg, 0, sizeof(ssid_arg));
     ssid_arg.length = wfx_rsi.sec.ssid_length;
-    chip::Platform::CopyString((char *) &ssid_arg.value[0], ssid_arg.length, wfx_rsi.sec.ssid);
+    memcpy((char *) &ssid_arg.value[0], wfx_rsi.sec.ssid, ssid_arg.length);
     sl_wifi_set_scan_callback(scan_callback_handler, NULL);
     scan_results_complete = false;
 #ifndef EXP_BOARD

examples/platform/silabs/efr32/rs911x/rsi_if.cpp

@@ -755,8 +755,9 @@ void ProcessEvent(WfxEvent_t inEvent)
             scan = &scan_rsp.scan_info[x];
             // clear structure and calculate size of SSID
             memset(&ap, 0, sizeof(ap));
-            ap.ssid_length =
-                strnlen(reinterpret_cast<char *>(scan->ssid), chip::min<size_t>(sizeof(scan->ssid), WFX_MAX_SSID_LENGTH));
+            // ap.ssid_length =
+                // strnlen(reinterpret_cast<char *>(scan->ssid), chip::min<size_t>(sizeof(scan->ssid) + 1, WFX_MAX_SSID_LENGTH));
+            ap.ssid_length = chip::min<size_t>(strnlen(ap.ssid) + 1, WFX_MAX_SSID_LENGTH); // +1 for null termination
             chip::Platform::CopyString(ap.ssid, ap.ssid_length, reinterpret_cast<char *>(scan->ssid));
 
             // check if the scanned ssid is the one we are looking for

examples/platform/silabs/efr32/wf200/host_if.cpp

@@ -736,7 +736,8 @@ int32_t wfx_get_ap_info(wfx_wifi_scan_result_t * ap)
 {
     int32_t signal_strength;
 
-    ap->ssid_length = strnlen(ap_info.ssid, chip::min<size_t>(sizeof(ap_info.ssid), WFX_MAX_SSID_LENGTH));
+    ap->ssid_length = chip::min<size_t>(strlen(ap_info.ssid) + 1, WFX_MAX_SSID_LENGTH); // +1 for null termination
+    // ap->ssid_length = strnlen(ap_info.ssid, chip::min<size_t>(sizeof(ap_info.ssid) + 1, WFX_MAX_SSID_LENGTH));
     chip::Platform::CopyString(ap->ssid, ap->ssid_length, ap_info.ssid);
     memcpy(ap->bssid, ap_info.bssid, sizeof(ap_info.bssid));
     ap->security = ap_info.security;
@@ -1184,7 +1185,7 @@ bool wfx_start_scan(char * ssid, void (*callback)(wfx_wifi_scan_result_t *))
     VerifyOrReturnError(scan_cb != nullptr, false);
     if (ssid)
     {
-        scan_ssid_length = strnlen(ssid, WFX_MAX_SSID_LENGTH);
+        scan_ssid_length = chip::min<size_t>(strnlen(ssid) + 1, WFX_MAX_SSID_LENGTH); // +1 for null termination
         scan_ssid        = reinterpret_cast<char *>(chip::Platform::MemoryAlloc(scan_ssid_length));
         VerifyOrReturnError(scan_ssid != nullptr, false);
         Platform::CopyString(scan_ssid, scan_ssid_length, ssid);

examples/platform/silabs/wifi/wfx_rsi_host.cpp

@@ -28,7 +28,6 @@
 #include <lib/support/CHIPMemString.h>
 #include <lib/support/CodeUtils.h>
 #include <lib/support/logging/CHIPLogging.h>
-
 #include "wfx_host_events.h"
 #include "wfx_rsi.h"
 
@@ -362,18 +361,21 @@ int32_t wfx_reset_counts(void)
  * @return returns ture if successful,
  *          false otherwise
  *******************************************************************************/
+#include "silabs_utils.h"
 bool wfx_start_scan(char * ssid, void (*callback)(wfx_wifi_scan_result_t *))
 {
     // check if already in progress
-    VerifyOrReturnError(wfx_rsi.scan_cb != nullptr, false);
+    VerifyOrReturnError(wfx_rsi.scan_cb == nullptr, false);
     wfx_rsi.scan_cb = callback;
-
-    VerifyOrReturnError(ssid != nullptr, false);
-    wfx_rsi.scan_ssid_length = strnlen(ssid, chip::min<size_t>(sizeof(ssid), WFX_MAX_SSID_LENGTH));
-    wfx_rsi.scan_ssid        = reinterpret_cast<char *>(chip::Platform::MemoryAlloc(wfx_rsi.scan_ssid_length));
-    VerifyOrReturnError(wfx_rsi.scan_ssid != nullptr, false);
-    chip::Platform::CopyString(wfx_rsi.scan_ssid, wfx_rsi.scan_ssid_length, ssid);
-
+    // if SSID is provided to scan only that SSID
+    if(ssid) {
+        // wfx_rsi.scan_ssid_length = strnlen(ssid, chip::min<size_t>((strlen(ssid) + 1), WFX_MA    X_SSID_LENGTH));
+        wfx_rsi.scan_ssid_length = chip::min<size_t>(strnlen(ssid, chip::DeviceLayer::Internal::kMaxWiFiSSIDLength) + 1, chip::DeviceLayer::Internal::kMaxWiFiSSIDLength);
+        wfx_rsi.scan_ssid        = reinterpret_cast<char *>(chip::Platform::MemoryAlloc(wfx_rsi.scan_ssid_length));
+        VerifyOrReturnError(wfx_rsi.scan_ssid != nullptr, false);
+        chip::Platform::CopyString(wfx_rsi.scan_ssid, wfx_rsi.scan_ssid_length, ssid);
+        SILABS_LOG("%s    hhhh    %s   %d     %d", wfx_rsi.scan_ssid, ssid, wfx_rsi.scan_ssid_length, strlen(ssid));
+    }
     WfxEvent_t event;
     event.eventType = WFX_EVT_SCAN;
     WfxPostEvent(&event);