Created iftop-dump

counter_hash.c

@@ -0,0 +1,56 @@
+/* hash table */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <netinet/in.h>
+#include "counter_hash.h"
+#include "hash.h"
+#include "iftop.h"
+
+#define hash_table_size 256
+
+int counter_hash_compare(void* a, void* b) {
+    return *(long*)a == *(long*)b;
+}
+
+int counter_hash_hash(void* key) {
+    int hash;
+    long addr;
+        
+    addr = *(long*)key;
+
+    hash = ((addr & 0x000000FF)
+            + (addr & 0x0000FF00 >> 8)
+            + (addr & 0x00FF0000 >> 16)
+            + (addr & 0xFF000000 >> 24)
+           ) % 0xFF;
+
+    return hash;
+}
+
+void* counter_hash_copy_key(void* orig) {
+    struct in_addr* copy;
+    copy = xmalloc(sizeof *copy);
+    *copy = *(struct in_addr*)orig;
+    return copy;
+}
+
+void counter_hash_delete_key(void* key) {
+    free(key);
+}
+
+/*
+ * Allocate and return a hash
+ */
+hash_type* counter_hash_create() {
+    hash_type* hash_table;
+    hash_table = xcalloc(hash_table_size, sizeof *hash_table);
+    hash_table->size = hash_table_size;
+    hash_table->compare = &counter_hash_compare;
+    hash_table->hash = &counter_hash_hash;
+    hash_table->delete_key = &counter_hash_delete_key;
+    hash_table->copy_key = &counter_hash_copy_key;
+    hash_initialise(hash_table);
+    return hash_table;
+}
+