added header file with first functions

wrote functions to  work with the owner data

project/Core/Inc/UDP_broadcast.h

@@ -0,0 +1,26 @@
+/*
+ * UDP_broadcast.h
+ *
+ *  Created on: Nov 6, 2023
+ *      Author: joran
+ */
+
+#ifndef INC_UDP_BROADCAST_H_
+#define INC_UDP_BROADCAST_H_
+
+typedef struct  {
+    char* name;
+    char* surname;
+    uint8_t mac_address[6];
+    char* reply;
+}owner_details_t;
+
+uint8_t set_owner_details_name(owner_details_t*, char* );
+uint8_t set_owner_details_sirname(owner_details_t*, char* );
+uint8_t set_owner_details(owner_details_t*, char* , char*);
+
+char* get_owner_details_name(owner_details_t);
+char* get_owner_details_surname(owner_details_t);
+
+
+#endif /* INC_UDP_BROADCAST_H_ */

project/Core/Src/UDP_broadcast.c

@@ -0,0 +1,168 @@
+/*
+ * UDP_broadcast.c
+ *
+ *  Created on: Nov 6, 2023
+ *      Author: joran
+ */
+                                                                                                                    //|
+#include "UDP_broadcast.h"
+#include <string.h>
+
+/**
+ * @fn void set_owner_details_mac(owner_details_t*)
+ * @brief
+ *
+ * @param owner
+ */
+
+static void set_owner_details_mac(owner_details_t* owner){
+	uint32_t uID[3];
+
+	HAL_GetUID(uID); // Read the UID registers
+
+	owner->mac_address[0] = (uID[0] >> 0) & 0xFF;
+	owner->mac_address[1] = (uID[0] >> 8) & 0xFF;
+	owner->mac_address[2] = (uID[0] >> 16) & 0xFF;
+	owner->mac_address[3] = (uID[1] >> 0) & 0xFF;
+	owner->mac_address[4] = (uID[1] >> 8) & 0xFF;
+	owner->mac_address[5] = (uID[1] >> 16) & 0xFF;
+}
+
+/**
+ * @fn uint8_t set_owner_details_name(owner_details_t*, char*)
+ * @brief
+ *
+ * @param owner
+ * @param name
+ * @return
+ */
+
+uint8_t set_owner_details_name(owner_details_t* owner, char* name){
+	if(name != NULL){
+		if(owner->name == NULL){
+		    owner->name = (char*)malloc(strlen(name) + 1);
+		}
+		else{
+			owner->name = (char*)realloc(owner->name,strlen(name) + 1);
+		}
+		strcpy(owner->name,name);
+		return 1;
+	}
+	else{
+		return 0;
+	}
+
+}
+
+/**
+ * @fn uint8_t set_owner_details_surname(owner_details_t*, char*)
+ * @brief
+ *
+ * @param owner
+ * @param surname
+ * @return
+ */
+uint8_t set_owner_details_surname(owner_details_t* owner, char* surname){
+	if(surname != NULL){
+		if(owner->surname == NULL){
+		    owner->surname = (char*)malloc(strlen(surname) + 1);
+		}
+		else{
+			owner->surname = (char*)realloc(owner->surname,strlen(surname) + 1);
+		}
+		strcpy(owner->surname,surname);
+		return 1;
+	}
+	else{
+		return 0;
+	}
+}
+
+/**
+ * @fn uint8_t set_owner_details_reply(owner_details_t, char*)
+ * @brief
+ *
+ * @param owner
+ * @param reply
+ * @return
+ */
+
+static uint8_t set_owner_details_reply(owner_details_t owner, char * reply){
+	if(reply != NULL){
+		if(owner->reply == NULL){
+		    owner->reply = (char*)malloc(strlen(reply) + 1);
+		}
+		else{
+			owner->reply = (char*)realloc(owner->reply,strlen(reply) + 1);
+		}
+		strcpy(owner->reply,reply);
+		return 1;
+	}
+	else{
+		return 0;
+	}
+}
+
+/**
+ * @fn void format_reply(owner_details_t*)
+ * @brief
+ *
+ * @param owner
+ */
+
+static void format_reply(owner_details_t *owner){
+	size_t reply_len = 0;
+	char mac_addr_str[18];
+	char* reply_buf = NULL;
+	if (owner != NULL) {
+		reply_len = 20 + strlen(mac_addr_str) + strlen(owner->surname) + strlen(owner->name);
+        reply_buf = (char*)malloc(reply_len);
+
+
+		snprintf(mac_addr_str, sizeof(mac_addr_str), "%02X:%02X:%02X:%02X:%02X:%02X",
+		owner->mac_address[0], owner->mac_address[1], owner->mac_address[2],
+		owner->mac_address[3], owner->mac_address[4], owner->mac_address[5]);
+
+        if (replyBuffer != NULL) {
+            snprintf(reply_buf, reply_len, "%s is present and my owner is %s %s",
+            		mac_addr_str, owner->surname, owner->name);
+
+            set_owner_details_reply(owner, reply_buf);
+
+            free(reply_buf); // Free the temporary buffer
+        }
+
+	}
+}
+
+/**
+ * @fn uint8_t set_owner_details(owner_details_t*, char*, char*)
+ * @brief
+ *
+ * @param owner
+ * @param name
+ * @param surname
+ * @return
+ */
+uint8_t set_owner_details(owner_details_t* owner, char* name, char* surname){
+	if(set_owner_details_name(owner, name) && set_owner_details_surname(owner, surname) && set_owner_details_mac(owner)){
+		format_reply(owner);
+	}
+}
+
+char* get_owner_details_name(owner_details_t owner){
+	char *err_reply = "no name yet";
+	if(owner == NULL || owner->name == NULL){
+		owner->name = (char*)malloc(strlen(err_reply));
+	}
+	return owner->name;
+}
+char* get_owner_details_surname(owner_details_t owner){
+	char *err_reply = "no surname yet";
+	if(owner == NULL || owner->surname == NULL){
+		owner->surname = (char*)malloc(strlen(err_reply));
+	}
+	return owner->name;
+}
+
+