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*/

/*
 * IPACM_LanToLan.h
 *
 *  Created on: Mar 4th, 2014
 *      Author: Shihuan Liu
 */

#ifndef IPACM_LANTOLAN_H
#define IPACM_LANTOLAN_H

#include <stdint.h>
#include "linux/msm_ipa.h"
#include "IPACM_Iface.h"
#include "IPACM_Defs.h"
#include "IPACM_Lan.h"
#include <unordered_map>

#ifdef FEATURE_IPA_ANDROID
#include <libxml/list.h>
#else/* defined(FEATURE_IPA_ANDROID) */
#include <list>
#endif /* ndefined(FEATURE_IPA_ANDROID)*/

struct client_info;

struct peer_info
{
	struct client_info* peer_pointer;
	int num_connection;
};

//used to store rule handles for offload link (one direction)
struct offload_link_info
{
	struct client_info* peer_pointer;
	uint32_t flt_rule_hdl;
	lan_to_lan_rt_rule_hdl rt_rule_hdl;
	uint32_t hdr_hdl;
};

typedef list<peer_info> peer_info_list;
typedef list<offload_link_info> offload_link_info_list;
typedef list<ipacm_event_connection> connection_list;

struct client_info
{
	union
	{
		uint32_t ipv4_addr;
		uint32_t ipv6_addr[4];
	} ip;
	uint8_t mac_addr[6];
	bool is_active;
	bool is_powersave;
	IPACM_Lan* p_iface;
	peer_info_list peer;
	offload_link_info_list link;
};

struct v6_addr
{
	uint32_t ipv6_addr[4];
};

typedef unordered_map<uint32_t, client_info> client_table_v4;
typedef unordered_map<uint64_t, client_info> client_table_v6;


class IPACM_LanToLan : public IPACM_Listener
{

public:

		IPACM_LanToLan();
		~IPACM_LanToLan();

		void handle_new_connection(ipacm_event_connection* new_conn);
		void handle_del_connection(ipacm_event_connection* del_conn);

		static IPACM_LanToLan* getLan2LanInstance();

private:

		uint8_t num_offload_pair_v4_;
		uint8_t num_offload_pair_v6_;
		client_table_v4 client_info_v4_;
		client_table_v6 client_info_v6_;

		connection_list connection_v4_;
		connection_list connection_v6_;

		static IPACM_LanToLan* p_instance;

		void event_callback(ipa_cm_event_id event, void* param);

		void handle_client_active(ipacm_event_lan_client* data);

		void check_potential_link(ipa_ip_type iptype, client_info* client);

		int add_offload_link(ipa_ip_type iptype, client_info* client, client_info* peer);

		void handle_client_inactive(ipacm_event_lan_client* data);

		int turnoff_offload_links(ipa_ip_type iptype, client_info* client);

		int del_offload_link(ipa_ip_type iptype, IPACM_Lan* client, IPACM_Lan* peer, offload_link_info* link);

		void handle_client_disconnect(ipacm_event_lan_client* data);

		int clear_peer_list(client_info* client);

		void handle_client_power_save(ipacm_event_lan_client* data);

		void handle_client_power_recover(ipacm_event_lan_client* data);

		int remove_flt_rules(ipa_ip_type iptype, client_info* client);

		int add_flt_rules(ipa_ip_type iptype, client_info* client);

//the following are for connections

		void handle_new_lan2lan_connection(ipacm_event_connection* data);

		bool add_connection(client_info* src_client, client_info* dst_client);

		void handle_del_lan2lan_connection(ipacm_event_connection* data);

		bool remove_connection(client_info* src_client, client_info* dst_client);

		void erase_offload_link(ipa_ip_type iptype, client_info* src_client, client_info* dst_client);

		void generate_new_connection(ipa_ip_type iptype, client_info* client);

		bool is_lan2lan_connection(ipacm_event_connection* data);

		bool is_potential_lan2lan_connection(ipacm_event_connection* new_conn);

		void cache_new_connection(ipacm_event_connection* new_conn);

		void remove_cache_connection(ipacm_event_connection* del_conn);

		void check_cache_connection(ipa_ip_type iptype, client_info* client);

};

#endif