Importing all of DRL, including ulogd and all of its files.

[distributedratelimiting.git] / drl / util.h

diff --git a/drl/util.h b/drl/util.h
new file mode 100644 (file)
index 0000000..ffe3321
--- /dev/null
+++ b/drl/util.h
@@ -0,0 +1,63 @@
+/* See the DRL-LICENSE file for this file's software license. */
+
+#ifndef _UTIL_H_
+#define _UTIL_H_
+
+#define _XOPEN_SOURCE 600 /* for pthread_rwlock_t */
+
+/*
+ * Jenkins hash support
+ */
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+#include <linux/jhash.h>
+
+#define MAP_KEY_SIZE 4 /* all 4 bytes for now */
+#define GENERIC_HASH_SIZE 16 /* must be powers of 2 */
+
+enum bool {false=0,true};
+
+struct map{
+    struct map_entry *table[GENERIC_HASH_SIZE];
+    int iterator_row;
+    struct map_entry *iterator;
+    int size;
+};
+
+struct map_entry {
+    struct map_entry *nxt;
+    char *key;
+    void *value;
+};
+
+/* typedef's */
+typedef struct map *map_handle;
+
+/* function prototypes */
+
+char* get_local_ip();
+
+void ip_from_bytes(uint32_t addr, char *buf);
+uint32_t myrand();
+int myrand_boolean();
+double myrand_double();
+int my_lg(int x);
+
+/* hash map interface */
+void init_hashing(void);
+map_handle allocate_map(void);
+void free_map(map_handle map, int dealloc);
+void** map_to_array(map_handle map, int *length);
+void* map_search(map_handle map,void *key, int keylen);
+void map_reset_iterate(map_handle map);
+void* map_next(map_handle table);
+void* map_remove(map_handle map,void *key, int keylen);
+void map_insert(map_handle map, void *key, int keylen, void *value);
+int map_size(map_handle map);
+
+/* sundry items */
+void print_system_error(int ret);
+
+
+#endif