Fixed segfault bug.

addr_hash.c

@@ -28,7 +28,7 @@ int hash(void* key) {
             + (addr & 0xFF000000 >> 24)) % 0xFF;
 
     addr = (long)ap->dst.s_addr;
-    hash += ((addr & 0x000000FF)
+    hash = ( hash + (addr & 0x000000FF)
             + (addr & 0x0000FF00 >> 8)
             + (addr & 0x00FF0000 >> 16)
             + (addr & 0xFF000000 >> 24)) % 0xFF;

hash.c

@@ -44,12 +44,14 @@ hash_status_enum hash_delete(hash_type* hash_table, void* key) {
     if (!p) return HASH_STATUS_KEY_NOT_FOUND;
 
     /* p designates node to delete, remove it from list */
-    if (p0)
+    if (p0) {
         /* not first node, p0 points to previous node */
         p0->next = p->next;
-    else
+    }
+    else {
         /* first node on chain */
         hash_table->table[bucket] = p->next;
+    }
 
     hash_table->delete_key(p->key);
     free (p);
@@ -62,9 +64,13 @@ hash_status_enum hash_find(hash_type* hash_table, void* key, void **rec) {
    /*******************************
     *  find node containing data  *
     *******************************/
-    p = hash_table->table[hash_table->hash(key)];
-    while (p && !hash_table->compare(p->key, key)) 
+    int bucket = hash_table->hash(key);
+
+    p = hash_table->table[bucket];
+
+    while (p && !hash_table->compare(p->key, key))  {
         p = p->next;
+    }
     if (!p) return HASH_STATUS_KEY_NOT_FOUND;
     *rec = p->rec;
     return HASH_STATUS_OK;

iftop.c

@@ -96,13 +96,13 @@ void tick(int print) {
     t = time(NULL);
     if(t - last_timestamp >= RESOLUTION) {
         //printf("TICKING\n");
-	analyse_data();
+        analyse_data();
         ui_print();
         history_rotate();
         last_timestamp = t;
     }
     else if(print) {
-	ui_print();
+        ui_print();
     }
 
     pthread_mutex_unlock(&tick_mutex);
@@ -187,7 +187,7 @@ static void handle_packet(char* args, const struct pcap_pkthdr* pkthdr,const cha
             hash_insert(history, &ap, ht);
         }
 
-	len = ntohs(iptr->ip_len);
+        len = ntohs(iptr->ip_len);
 
         /* Update record */
         ht->last_write = history_pos;