On the verse of memory leaks

praxis3/zmq_worker.c

@@ -31,8 +31,9 @@ int main(int argc, char **argv){
     while(thread_count < worker_count){
         int *port = malloc(sizeof(int));
         *port = atoi(argv[worker_index]);
-        if(pthread_create(&threads[thread_count++], NULL, workerFunc, port) != 0){
+        if(pthread_create(&threads[thread_count++], NULL, workerFunc, (void*)port) != 0){
             perror("[MAIN] Failed to create thread");
+            free(port);
             free(threads);
             exit(1);
         }
@@ -65,8 +66,13 @@ TYPE get_request_type(const char *request){
 }
 
 void* workerFunc(void *args){
+    if(!args){
+        perror("[THREAD] Invalid arguments");
+        return NULL;
+    }
     int port = *(int*)args;
     free(args);
+
     void *context = zmq_ctx_new();
     if(!context){
         perror("[THREAD] Failed to create context");
@@ -94,10 +100,10 @@ void* workerFunc(void *args){
         key_value_pair *head = NULL;
         key_value_pair *tail = NULL;
 
-        char request[MESSAGE_LENGTH + 1];
+        char request[MESSAGE_LENGTH + 1] = {0};
         int bytes_recv = zmq_recv(responder, request, MESSAGE_LENGTH, 0);
-        if(bytes_recv <= 0){
-            perror("Failed to receive request");
+        if(bytes_recv < 3){ // minimal receive is TYPE
+            perror("Failed to receive valid request");
             continue;
         }
 
@@ -106,9 +112,11 @@ void* workerFunc(void *args){
         char endpoint[256];
         size_t endpoint_size = sizeof(endpoint);
         if (zmq_getsockopt(responder, ZMQ_LAST_ENDPOINT, endpoint, &endpoint_size) == 0) {
-            fprintf(stderr, "Got request from: %s\n", endpoint);
+            fprintf(stderr, "Got request on: %s\n", endpoint);
         }
 
+        fprintf(stderr, "Received: %s\n", request);
+
         const TYPE type = get_request_type(request);
         char *content = request + TYPE_LENGTH;
 
@@ -137,6 +145,7 @@ void* workerFunc(void *args){
                 exit(1);
                 break;
         }
+
         fprintf(stderr, "Sending content: %s\n", ret);
         if(zmq_send(responder, ret, strlen(ret), 0) < 0){
             perror("Failed to send response");
@@ -178,7 +187,7 @@ char* get_word(const char *request){
         return NULL;
 
     while(*request && isalpha(*request)){
-        char *new_word = (char*)realloc(word, strlen(word) + 2);    // realloc word size + \0 and extra char space
+        char *new_word = (char*)realloc(word, length + 2);    // realloc word size + \0 and extra char space
         if(!new_word){
             free(word);
             return NULL;
@@ -193,6 +202,7 @@ char* get_word(const char *request){
 }
 
 char* map(const char *content, key_value_pair **head, key_value_pair **tail){
+    if(!content) return NULL;
     char *content_iterator = (char*)content;
     void *content_start_address = (void*)content;
     size_t content_length = strlen(content);