initial session backup implementation

1 files changed, 94 insertions, 0 deletions

diff --git a/accel-pppd/backup/backup.h b/accel-pppd/backup/backup.h
new file mode 100644
index 0000000..39c4ed7
--- /dev/null
+++ b/accel-pppd/backup/backup.h
@@ -0,0 +1,94 @@
+#ifndef __BACKUP_H
+#define __BACKUP_H
+
+#include <stdint.h>
+#include "list.h"
+
+#define MODID_COMMON  1
+#define MODID_RADIUS  2
+#define MODID_PPPOE   3
+#define MODID_IPOE    4
+#define MODID_PPTP    5
+#define MODID_L2TP    6
+#define MODID_IPPOOL  7
+
+
+struct ap_session;
+struct backup_storage;
+struct backup_data;
+
+struct backup_tag
+{
+	struct list_head entry;
+	uint16_t internal:1;
+	uint8_t id;
+	uint16_t size;
+	uint8_t *data;
+};
+
+struct backup_mod
+{
+	struct backup_data *data;
+	struct list_head entry;
+	int id;
+	struct list_head tag_list;
+};
+
+struct backup_data
+{
+	struct ap_session *ses;
+	struct backup_storage *storage;
+	struct list_head mod_list;
+	int internal:1;
+};
+	
+struct backup_module
+{
+	struct list_head entry;
+	int id;
+
+	int (*save)(struct ap_session *, struct backup_mod *);
+	int (*restore)(struct ap_session *, struct backup_mod *);
+	
+	struct ap_session *(*ctrl_restore)(struct backup_mod *);
+	void (*ctrl_start)(struct ap_session *ses);
+};
+
+struct backup_storage
+{
+	struct list_head entry;
+
+	/*int (*check_integrity)(void);
+	int (*restore)(int internal);*/
+	
+	void (*restore)(int internal);
+
+	struct backup_data *(*create)(struct ap_session *);
+	int (*commit)(struct backup_data *);
+	void (*free)(struct backup_data *);
+	
+	struct backup_mod *(*alloc_mod)(struct backup_data *);
+	void (*free_mod)(struct backup_mod *);
+
+	void (*add_fd)(struct backup_data *, int fd);
+	
+	struct backup_tag *(*alloc_tag)(struct backup_data *, int size);
+	void (*free_tag)(struct backup_data *, struct backup_tag *);
+};
+
+void backup_register_module(struct backup_module *);
+void backup_register_storage(struct backup_storage *);
+
+int backup_save_session(struct ap_session *ses);
+void backup_restore_session(struct backup_data *d);
+
+struct backup_mod *backup_find_mod(struct backup_data *d, uint8_t mod_id);
+struct backup_tag *backup_find_tag(struct backup_data *d, uint8_t mod_id, uint8_t tag_id, int internal);
+struct backup_tag *backup_add_tag(struct backup_mod *m, uint8_t id, int internal, const void *data, size_t size);
+void backup_add_fd(struct backup_mod *m, int fd);
+
+void backup_restore(int internal);
+void backup_restore_fd();
+
+#endif
+