Timer Library Complete

Assignment/rt.h

@@ -0,0 +1,97 @@
+#ifndef __RT__
+#define __RT__
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <timerlib.h>
+
+#define RT_TABLE_EXP_TIME	30  /*  30 sec */
+
+
+typedef struct rt_entry_keys_ {
+
+    char dest[16];
+    char mask;
+} rt_entry_keys_t;
+
+typedef struct rt_entry_ {
+
+    /* A Structure which represents only the keys of the
+     * Routing Table.*/
+    rt_entry_keys_t rt_entry_keys;
+
+    char gw_ip[16];
+    char oif[32];
+    uint32_t time_to_expire; /* time left to delete the entry */
+    Timer_t* timer;
+    struct rt_entry_* prev;
+    struct rt_entry_* next;
+} rt_entry_t;
+
+typedef struct rt_table_ {
+
+    rt_entry_t* head;
+} rt_table_t;
+
+void
+rt_init_rt_table(rt_table_t* rt_table);
+
+bool
+rt_add_new_rt_entry(rt_table_t* rt_table,
+    char* dest_ip, char mask, char* gw_ip, char* oif, void (*timer_cb)(Timer_t*, void*));
+
+bool
+rt_delete_rt_entry(rt_table_t* rt_table,
+    char* dest_ip, char mask);
+
+bool
+rt_update_rt_entry(rt_table_t* rt_table,
+    char* dest_ip, char mask,
+    char* new_gw_ip, char* new_oif);
+
+void
+rt_clear_rt_table(rt_table_t* rt_table);
+
+void
+rt_free_rt_table(rt_table_t* rt_table);
+
+void
+rt_dump_rt_table(rt_table_t* rt_table);
+
+static inline void
+rt_entry_remove(rt_table_t* rt_table,
+    rt_entry_t* rt_entry) {
+
+    if (!rt_entry->prev) {
+        if (rt_entry->next) {
+            rt_entry->next->prev = 0;
+            rt_table->head = rt_entry->next;
+            rt_entry->next = 0;
+            return;
+        }
+        rt_table->head = NULL;
+        return;
+    }
+    if (!rt_entry->next) {
+        rt_entry->prev->next = 0;
+        rt_entry->prev = 0;
+        return;
+    }
+
+    rt_entry->prev->next = rt_entry->next;
+    rt_entry->next->prev = rt_entry->prev;
+    rt_entry->prev = 0;
+    rt_entry->next = 0;
+}
+
+#define ITERTAE_RT_TABLE_BEGIN(rt_table_ptr, rt_entry_ptr)                \
+{                                                                         \
+    rt_entry_t *_next_rt_entry;                                           \
+    for((rt_entry_ptr) = (rt_table_ptr)->head;                            \
+            (rt_entry_ptr);                                               \
+            (rt_entry_ptr) = _next_rt_entry) {                            \
+        _next_rt_entry = (rt_entry_ptr)->next;
+
+#define ITERTAE_RT_TABLE_END(rt_table_ptr, rt_entry_ptr)  }}
+
+#endif /* __RT__ */