WiFi: add scan()

libraries/SocketWrapper/SocketHelpers.cpp

@@ -1,4 +1,5 @@
 #include "SocketHelpers.h"
+#include <WiFi.h>
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(sketch, LOG_LEVEL_NONE);
@@ -8,14 +9,13 @@
 
 void NetworkInterface::event_handler(struct net_mgmt_event_callback *cb, uint64_t mgmt_event,
 									 struct net_if *iface) {
-	int i = 0;
 
-	if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
-		return;
-	}
+    // 1. Handle DHCP events first (e.g., NET_EVENT_IPV4_ADDR_ADD)
+    if (mgmt_event & NET_EVENT_IPV4_ADDR_ADD) {
 
-	for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
-		char buf[NET_IPV4_ADDR_LEN];
+        int i = 0;
+		for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
+			char buf[NET_IPV4_ADDR_LEN];
 
 		if (iface->config.ip.ipv4->unicast[i].ipv4.addr_type != NET_ADDR_DHCP) {
 			continue;
@@ -34,6 +34,24 @@
 	}
 }
 
+    // 2. Handle WiFi events
+    if (mgmt_event == NET_EVENT_WIFI_SCAN_RESULT) {
+        const struct wifi_scan_result *entry = reinterpret_cast<const struct wifi_scan_result *>(cb->info);
+        // Call the registered callback for scan result, if it's set
+        if (scanResultCallback) {
+            scanResultCallback(entry);
+        }
+    } else if (mgmt_event == NET_EVENT_WIFI_SCAN_DONE) {
+        // Call the registered callback for scan done, if it's set
+        if (scanDoneCallback) {
+            scanDoneCallback();
+        }
+    }
+
+    // 3. Handle [placeholder] events
+    // ...
+}
+
 void NetworkInterface::option_handler(struct net_dhcpv4_option_callback *cb, size_t length,
 									  enum net_dhcpv4_msg_type msg_type, struct net_if *iface) {
 	char buf[NET_IPV4_ADDR_LEN];
@@ -58,6 +76,14 @@
 	return 0;
 }
 
+int NetworkInterface::wifi() {
+	net_mgmt_init_event_callback(&mgmt_cb, event_handler,
+								NET_EVENT_WIFI_SCAN_RESULT | NET_EVENT_WIFI_SCAN_DONE);
+	net_mgmt_add_event_callback(&mgmt_cb);
+
+	return 0;
+}
+
 void NetworkInterface::enable_dhcpv4_server(struct net_if *netif, char *_netmask) {
 	static struct in_addr addr;
 	static struct in_addr netmaskAddr;
@@ -191,3 +217,15 @@
 void NetworkInterface::setDnsServerIP(const IPAddress dns_server) {
 	return; // DNS server dynamic configuration is not supported
 }
+
+// Initialize static member variables
+NetworkInterface::WiFiScanResultCallback NetworkInterface::scanResultCallback = nullptr;
+NetworkInterface::WiFiScanDoneCallback NetworkInterface::scanDoneCallback = nullptr;
+
+void NetworkInterface::registerWiFiScanResultCallback(WiFiScanResultCallback callback) {
+    scanResultCallback = callback;
+}
+
+void NetworkInterface::registerWiFiScanDoneCallback(WiFiScanDoneCallback callback) {
+    scanDoneCallback = callback;
+}

libraries/SocketWrapper/SocketHelpers.h

@@ -1,3 +1,3 @@
 #pragma once
 
 #include <zephyr/net/dhcpv4.h>
@@ -7,35 +7,22 @@
 #include <zephyr/linker/sections.h>
 #include <errno.h>
 #include <stdio.h>
+#include <functional>
 
 #include <zephyr/net/net_if.h>
 #include <zephyr/net/net_core.h>
 #include <zephyr/net/net_context.h>
 #include <zephyr/net/net_mgmt.h>
 #include <zephyr/net/ethernet.h>
 #include <zephyr/net/ethernet_mgmt.h>
+#include <zephyr/net/wifi_mgmt.h>
 
 #include <api/IPAddress.h>
 
+
 #define DHCP_OPTION_NTP (42)
 
 class NetworkInterface {
-private:
-	uint8_t ntp_server[4];
-	static struct net_mgmt_event_callback mgmt_cb;
-	static struct net_dhcpv4_option_callback dhcp_cb;
-
-	static void event_handler(struct net_mgmt_event_callback *cb, uint64_t mgmt_event,
-							  struct net_if *iface);
-
-	static void option_handler(struct net_dhcpv4_option_callback *cb, size_t length,
-							   enum net_dhcpv4_msg_type msg_type, struct net_if *iface);
-
-protected:
-	struct net_if *netif = nullptr;
-	int dhcp();
-	void enable_dhcpv4_server(struct net_if *netif, char *_netmask = "255.255.255.0");
-
 public:
 	NetworkInterface() {
 	}
@@ -60,4 +47,28 @@
 	int begin(bool blocking = true, uint32_t additional_event_mask = 0);
 
 	bool disconnect();
+    using WiFiScanResultCallback = std::function<void(const struct wifi_scan_result*)>;
+    using WiFiScanDoneCallback = std::function<void()>;
+
+    void registerWiFiScanResultCallback(WiFiScanResultCallback callback);
+    void registerWiFiScanDoneCallback(WiFiScanDoneCallback callback);
+protected:
+	struct net_if *netif = nullptr;
+	int dhcp();
+	int wifi();
+	void enable_dhcpv4_server(struct net_if *netif, char *_netmask = "255.255.255.0");
+private:
+	uint8_t ntp_server[4];
+	static struct net_mgmt_event_callback mgmt_cb;
+	static struct net_dhcpv4_option_callback dhcp_cb;
+
+
+	static void event_handler(struct net_mgmt_event_callback *cb, uint64_t mgmt_event,
+							  struct net_if *iface);
+
+	static void option_handler(struct net_dhcpv4_option_callback *cb, size_t length,
+							   enum net_dhcpv4_msg_type msg_type, struct net_if *iface);
+
+	static WiFiScanResultCallback scanResultCallback;
+	static WiFiScanDoneCallback scanDoneCallback;
 };

libraries/WiFi/examples/WiFiWebClient/WiFiWebClient.ino

@@ -50,8 +50,8 @@ void setup() {
     Serial.println(ssid);
     // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
     status = WiFi.begin(ssid, pass);
-    // wait 3 seconds for connection:
-    delay(3000);
+    // wait 6 seconds for connection:
+    delay(6000);
   }
   Serial.println("Connected to wifi");
   printWifiStatus();