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rt.h

@@ -0,0 +1,122 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  rt.h
+ *
+ *    Description:  
+ *
+ *        Version:  1.0
+ *        Created:  10/03/24 12:47:20 PM IST
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  YOUR NAME (), 
+ *   Organization:  
+ *
+ * =====================================================================================
+ */
+#ifndef __RT__
+#define __RT__
+
+#include <stdbool.h>
+#include "notif.h"
+
+typedef struct rt_entry_keys_{
+
+    char dest[16];
+    char mask;
+} rt_entry_keys_t;
+
+typedef struct rt_entry_{
+
+    /* A Structure which represnets only the keys of the
+     * Routing Table.*/
+    rt_entry_keys_t rt_entry_keys;
+
+    char gw_ip[16];
+    char oif[32];
+	bool created;
+    struct rt_entry_ *prev;
+    struct rt_entry_ *next;	
+	notif_chain_t *nfc;
+} rt_entry_t;
+
+typedef struct rt_table_{
+
+    rt_entry_t *head;
+} rt_table_t;
+
+void
+rt_init_rt_table(rt_table_t *rt_table);
+
+rt_entry_t *
+rt_add_or_update_rt_entry(rt_table_t *rt_table,
+    char *dest_ip, char mask, char *gw_ip, char *oif);
+
+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);
+
+rt_entry_t *
+rt_look_up_rt_entry(rt_table_t *rt_table, 
+					char *dest, char mask);
+
+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 = 0;
+        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)  }}
+
+void
+rt_table_register_for_notification(
+	rt_table_t *rt_table,
+	rt_entry_keys_t *key,
+	size_t key_size,
+	nfc_app_cb app_cb,
+	uint32_t subs_id);
+
+#endif /* __RT__ */