/*
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modification, are permitted provided that the following conditions are
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      notice, this list of conditions and the following disclaimer.
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      copyright notice, this list of conditions and the following
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      contributors may be used to endorse or promote products derived
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*/
/*!
	@file
	IPACM_Lan.h

	@brief
	This file implements the LAN iface definitions

	@Author
	Skylar Chang

*/
#ifndef IPACM_LAN_H
#define IPACM_LAN_H

#include <stdio.h>
#include <linux/msm_ipa.h>

#include "IPACM_CmdQueue.h"
#include "IPACM_Iface.h"
#include "IPACM_Routing.h"
#include "IPACM_Filtering.h"
#include "IPACM_Config.h"
#include "IPACM_Conntrack_NATApp.h"
#include "IPACM_Wan.h"

#define IPA_WAN_DEFAULT_FILTER_RULE_HANDLES  1
#define IPA_PRIV_SUBNET_FILTER_RULE_HANDLES  3
#define IPA_NUM_ODU_ROUTE_RULES 2
#define MAX_WAN_UL_FILTER_RULES MAX_NUM_EXT_PROPS
#define NUM_IPV4_ICMP_FLT_RULE 1
#define NUM_IPV6_ICMP_FLT_RULE 1

/* ndc bandwidth ipatetherstats <ifaceIn> <ifaceOut> */
/* <in->out_bytes> <in->out_pkts> <out->in_bytes> <out->in_pkts */

#define PIPE_STATS "%s %s %llu %llu %llu %llu"
#define IPA_PIPE_STATS_FILE_NAME "/data/misc/ipa/tether_stats"

/* store each lan-iface unicast routing rule and its handler*/
struct ipa_lan_rt_rule
{
	ipa_ip_type ip;
	uint32_t v4_addr;
	uint32_t v4_addr_mask;
	uint32_t v6_addr[4];
	uint32_t rt_rule_hdl[0];
};

/* Support multiple eth client */
typedef struct _eth_client_rt_hdl
{
	uint32_t eth_rt_rule_hdl_v4;
	uint32_t eth_rt_rule_hdl_v6[IPV6_NUM_ADDR];
	uint32_t eth_rt_rule_hdl_v6_wan[IPV6_NUM_ADDR];
}eth_client_rt_hdl;

typedef struct _ipa_eth_client
{
	uint8_t mac[IPA_MAC_ADDR_SIZE];
	uint32_t v4_addr;
	uint32_t v6_addr[IPV6_NUM_ADDR][4];
	uint32_t hdr_hdl_v4;
	uint32_t hdr_hdl_v6;
	bool route_rule_set_v4;
	int route_rule_set_v6;
	bool ipv4_set;
	int ipv6_set;
	bool ipv4_header_set;
	bool ipv6_header_set;
	/* used for pcie-modem */
	uint32_t v6_rt_rule_id[IPV6_NUM_ADDR];
	eth_client_rt_hdl eth_rt_hdl[0]; /* depends on number of tx properties */
}ipa_eth_client;


/* lan iface */
class IPACM_Lan : public IPACM_Iface
{
public:

	IPACM_Lan(int iface_index);
	~IPACM_Lan();

	/* store lan's wan-up filter rule handlers */
	uint32_t lan_wan_fl_rule_hdl[IPA_WAN_DEFAULT_FILTER_RULE_HANDLES];

	/* store private-subnet filter rule handlers */
	uint32_t private_fl_rule_hdl[IPA_MAX_PRIVATE_SUBNET_ENTRIES + IPA_MAX_MTU_ENTRIES];

	/* LAN-iface's callback function */
	void event_callback(ipa_cm_event_id event, void *data);

	virtual int handle_wan_up(ipa_ip_type ip_type);

	/* configure filter rule for wan_up event*/
	virtual int handle_wan_up_ex(ipacm_ext_prop* ext_prop, ipa_ip_type iptype, uint8_t xlat_mux_id);

	/* delete filter rule for wan_down event*/
	virtual int handle_wan_down(ipacm_wan_iface_type backhaul_mode);

	/* delete filter rule for wan_down event*/
	virtual int handle_wan_down_v6(ipacm_wan_iface_type backhaul_mode);

	/* configure private subnet filter rules*/
	virtual int handle_private_subnet(ipa_ip_type iptype);

	/* handle new_address event*/
	int handle_addr_evt(ipacm_event_data_addr *data);

	int handle_addr_evt_odu_bridge(ipacm_event_data_addr* data);

	int handle_del_ipv6_addr(ipacm_event_data_all *data);

	static bool odu_up;

	/* install UL filter rule from Q6 */
	virtual int handle_uplink_filter_rule(ipacm_ext_prop* prop, ipa_ip_type iptype, uint8_t xlat_mux_id);

	int handle_cradle_wan_mode_switch(bool is_wan_bridge_mode);

	int install_ipv4_icmp_flt_rule();


	/* add header processing context and return handle to lan2lan controller */
	int eth_bridge_add_hdr_proc_ctx(ipa_hdr_l2_type peer_l2_hdr_type, uint32_t *hdl);

	/* add routing rule and return handle to lan2lan controller */
	int eth_bridge_add_rt_rule(uint8_t *mac, char *rt_tbl_name, uint32_t hdr_proc_ctx_hdl,
		ipa_hdr_l2_type peer_l2_hdr_type, ipa_ip_type iptype, uint32_t *rt_rule_hdl, int *rt_rule_count, int ep);

	/* modify routing rule*/
	int eth_bridge_modify_rt_rule(uint8_t *mac, uint32_t hdr_proc_ctx_hdl,
		ipa_hdr_l2_type peer_l2_hdr_type, ipa_ip_type iptype, uint32_t *rt_rule_hdl, int rt_rule_count);

	/* add filtering rule and return handle to lan2lan controller */
	int eth_bridge_add_flt_rule(uint8_t *mac, uint32_t rt_tbl_hdl, ipa_ip_type iptype, uint32_t *flt_rule_hdl);

	/* delete filtering rule */
	int eth_bridge_del_flt_rule(uint32_t flt_rule_hdl, ipa_ip_type iptype);

	/* delete routing rule */
	int eth_bridge_del_rt_rule(uint32_t rt_rule_hdl, ipa_ip_type iptype);

	/* delete header processing context */
	int eth_bridge_del_hdr_proc_ctx(uint32_t hdr_proc_ctx_hdl);

#ifdef FEATURE_L2TP
	/* add l2tp rt rule for l2tp client */
	int add_l2tp_rt_rule(ipa_ip_type iptype, uint8_t *dst_mac, ipa_hdr_l2_type peer_l2_hdr_type,
		uint32_t l2tp_session_id, uint32_t vlan_id, uint8_t *vlan_client_mac, uint32_t *vlan_iface_ipv6_addr,
		uint32_t *vlan_client_ipv6_addr, uint32_t *first_pass_hdr_hdl, uint32_t *first_pass_hdr_proc_ctx_hdl,
		uint32_t *second_pass_hdr_hdl, int *num_rt_hdl, uint32_t *first_pass_rt_rule_hdl, uint32_t *second_pass_rt_rule_hdl);

	/* delete l2tp rt rule for l2tp client */
	int del_l2tp_rt_rule(ipa_ip_type iptype, uint32_t first_pass_hdr_hdl, uint32_t first_pass_hdr_proc_ctx_hdl,
		uint32_t second_pass_hdr_hdl, int num_rt_hdl, uint32_t *first_pass_rt_rule_hdl, uint32_t *second_pass_rt_rule_hdl);

	/* add l2tp rt rule for non l2tp client */
	int add_l2tp_rt_rule(ipa_ip_type iptype, uint8_t *dst_mac, uint32_t *hdr_proc_ctx_hdl,
		int *num_rt_hdl, uint32_t *rt_rule_hdl);

	/* delete l2tp rt rule for non l2tp client */
	int del_l2tp_rt_rule(ipa_ip_type iptype, int num_rt_hdl, uint32_t *rt_rule_hdl);

	/* add l2tp flt rule on l2tp interface */
	int add_l2tp_flt_rule(uint8_t *dst_mac, uint32_t *flt_rule_hdl);

	/* delete l2tp flt rule on l2tp interface */
	int del_l2tp_flt_rule(uint32_t flt_rule_hdl);

	/* add l2tp flt rule on non l2tp interface */
	int add_l2tp_flt_rule(ipa_ip_type iptype, uint8_t *dst_mac, uint32_t *vlan_client_ipv6_addr,
		uint32_t *first_pass_flt_rule_hdl, uint32_t *second_pass_flt_rule_hdl);

	/* delete l2tp flt rule on non l2tp interface */
	int del_l2tp_flt_rule(ipa_ip_type iptype, uint32_t first_pass_flt_rule_hdl, uint32_t second_pass_flt_rule_hdl);
#endif

protected:

	int each_client_rt_rule_count[IPA_IP_MAX];

	uint32_t eth_bridge_flt_rule_offset[IPA_IP_MAX];

	/* mac address has to be provided for client related events */
	void eth_bridge_post_event(ipa_cm_event_id evt, ipa_ip_type iptype, uint8_t *mac,
		uint32_t *ipv6_addr, char *iface_name, int ep);

#ifdef FEATURE_L2TP
	/* check if the event is associated with vlan interface */
	bool is_vlan_event(char *event_iface_name);
	/* check if the event is associated with l2tp interface */
	bool is_l2tp_event(char *event_iface_name);

	/* check if the IPv6 address is unique local address */
	bool is_unique_local_ipv6_addr(uint32_t *ipv6_addr);

#endif
	virtual int add_dummy_private_subnet_flt_rule(ipa_ip_type iptype);

	int handle_private_subnet_android(ipa_ip_type iptype);

	int reset_to_dummy_flt_rule(ipa_ip_type iptype, uint32_t rule_hdl);

	virtual int install_ipv6_prefix_flt_rule(uint32_t* prefix);

	virtual void delete_ipv6_prefix_flt_rule();

	int install_ipv6_icmp_flt_rule();

	void post_del_self_evt();

	/* handle tethering stats */
	int handle_tethering_stats_event(ipa_get_data_stats_resp_msg_v01 *data);

	/* handle tethering client */
	int handle_tethering_client(bool reset, ipacm_client_enum ipa_client);

	/* add tcp syn flt rule */
	int add_tcp_syn_flt_rule(ipa_ip_type iptype);

	/* add tcp syn flt rule for l2tp interface*/
	int add_tcp_syn_flt_rule_l2tp(ipa_ip_type inner_ip_type);

	/* store ipv4 UL filter rule handlers from Q6*/
	uint32_t wan_ul_fl_rule_hdl_v4[MAX_WAN_UL_FILTER_RULES];

	/* store ipv6 UL filter rule handlers from Q6*/
	uint32_t wan_ul_fl_rule_hdl_v6[MAX_WAN_UL_FILTER_RULES];

	uint32_t ipv4_icmp_flt_rule_hdl[NUM_IPV4_ICMP_FLT_RULE];

	uint32_t ipv6_prefix_flt_rule_hdl[NUM_IPV6_PREFIX_FLT_RULE + NUM_IPV6_PREFIX_MTU_RULE];
	uint32_t ipv6_icmp_flt_rule_hdl[NUM_IPV6_ICMP_FLT_RULE];

	int num_wan_ul_fl_rule_v4;
	int num_wan_ul_fl_rule_v6;

	bool is_active;
	bool modem_ul_v4_set;
	uint8_t v4_mux_id;
	bool modem_ul_v6_set;
	uint8_t v6_mux_id;

	bool sta_ul_v4_set;
	bool sta_ul_v6_set;

	uint32_t if_ipv4_subnet;

	uint32_t ipv6_prefix[2];

	bool is_upstream_set[IPA_IP_MAX];
	bool is_downstream_set[IPA_IP_MAX];
	_ipacm_offload_prefix prefix[IPA_IP_MAX];

	uint32_t tcp_syn_flt_rule_hdl[IPA_IP_MAX];

private:

	int set_client_pipe(enum ipa_client_type client, uint32_t *pipe);
	int set_tether_client(wan_ioctl_set_tether_client_pipe *tether_client);
	int set_tether_client_wigig(wan_ioctl_set_tether_client_pipe *tether_client);

	/* get hdr proc ctx type given source and destination l2 hdr type */
	ipa_hdr_proc_type eth_bridge_get_hdr_proc_type(ipa_hdr_l2_type t1, ipa_hdr_l2_type t2);

	/* get partial header (header template of hdr proc ctx) */
	int eth_bridge_get_hdr_template_hdl(uint32_t* hdr_hdl);


	/* dynamically allocate lan iface's unicast routing rule structure */

	bool is_mode_switch; /* indicate mode switch, need post internal up event */

	int eth_client_len;

	ipa_eth_client *eth_client;

	int header_name_count;

	uint32_t num_eth_client;

	NatApp *Nat_App;

	int ipv6_set;

	uint32_t ODU_hdr_hdl_v4, ODU_hdr_hdl_v6;

	uint32_t *odu_route_rule_v4_hdl;

	uint32_t *odu_route_rule_v6_hdl;

	bool ipv4_header_set;

	bool ipv6_header_set;

	inline ipa_eth_client* get_client_memptr(ipa_eth_client *param, int cnt)
	{
	    char *ret = ((char *)param) + (eth_client_len * cnt);
		return (ipa_eth_client *)ret;
	}

	inline int get_eth_client_index(uint8_t *mac_addr)
	{
		int cnt;
		int num_eth_client_tmp = num_eth_client;

		IPACMDBG_H("Passed MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
						 mac_addr[0], mac_addr[1], mac_addr[2],
						 mac_addr[3], mac_addr[4], mac_addr[5]);

		for(cnt = 0; cnt < num_eth_client_tmp; cnt++)
		{
			IPACMDBG_H("stored MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
							 get_client_memptr(eth_client, cnt)->mac[0],
							 get_client_memptr(eth_client, cnt)->mac[1],
							 get_client_memptr(eth_client, cnt)->mac[2],
							 get_client_memptr(eth_client, cnt)->mac[3],
							 get_client_memptr(eth_client, cnt)->mac[4],
							 get_client_memptr(eth_client, cnt)->mac[5]);

			if(memcmp(get_client_memptr(eth_client, cnt)->mac,
								mac_addr,
								sizeof(get_client_memptr(eth_client, cnt)->mac)) == 0)
			{
				IPACMDBG_H("Matched client index: %d\n", cnt);
				return cnt;
			}
		}

		return IPACM_INVALID_INDEX;
	}

	inline int delete_eth_rtrules(int clt_indx, ipa_ip_type iptype)
	{
		uint32_t tx_index;
		uint32_t rt_hdl;
		int num_v6;

		if(iptype == IPA_IP_v4)
		{
		    for(tx_index = 0; tx_index < iface_query->num_tx_props; tx_index++)
		    {
		        if((tx_prop->tx[tx_index].ip == IPA_IP_v4) && (get_client_memptr(eth_client, clt_indx)->route_rule_set_v4==true)) /* for ipv4 */
				{
					IPACMDBG_H("Delete client index %d ipv4 RT-rules for tx:%d\n",clt_indx,tx_index);
					rt_hdl = get_client_memptr(eth_client, clt_indx)->eth_rt_hdl[tx_index].eth_rt_rule_hdl_v4;

					if(m_routing.DeleteRoutingHdl(rt_hdl, IPA_IP_v4) == false)
					{
						return IPACM_FAILURE;
					}
				}
		    } /* end of for loop */

		     /* clean the ipv4 RT rules for eth-client:clt_indx */
		     if(get_client_memptr(eth_client, clt_indx)->route_rule_set_v4==true) /* for ipv4 */
		     {
				get_client_memptr(eth_client, clt_indx)->route_rule_set_v4 = false;
		     }
		}

		if(iptype == IPA_IP_v6)
		{
			for(tx_index = 0; tx_index < iface_query->num_tx_props; tx_index++)
			{
				if((tx_prop->tx[tx_index].ip == IPA_IP_v6) && (get_client_memptr(eth_client, clt_indx)->route_rule_set_v6 != 0)) /* for ipv6 */
				{
					for(num_v6 =0;num_v6 < get_client_memptr(eth_client, clt_indx)->route_rule_set_v6;num_v6++)
					{
						/* send client-v6 delete to pcie modem only with global ipv6 with tx_index = 1 one time*/
						if(is_global_ipv6_addr(get_client_memptr(eth_client, clt_indx)->v6_addr[num_v6]) && (IPACM_Wan::backhaul_mode == Q6_MHI_WAN)
							&& (get_client_memptr(eth_client, clt_indx)->v6_rt_rule_id[num_v6] > 0))
						{
							IPACMDBG_H("Delete client index %d ipv6 RT-rules for %d-st ipv6 for rule-id:%d\n", clt_indx,num_v6,
								get_client_memptr(eth_client, clt_indx)->v6_rt_rule_id[num_v6]);
							if (del_connection(clt_indx, num_v6))
							{
								IPACMERR("PCIE filter rule deletion failed! (%d-client) %d v6-entry\n",clt_indx, num_v6);
							}
						}

						IPACMDBG_H("Delete client index %d ipv6 RT-rules for %d-st ipv6 for tx:%d\n", clt_indx,num_v6,tx_index);
						rt_hdl = get_client_memptr(eth_client, clt_indx)->eth_rt_hdl[tx_index].eth_rt_rule_hdl_v6[num_v6];
						if(m_routing.DeleteRoutingHdl(rt_hdl, IPA_IP_v6) == false)
							{
								return IPACM_FAILURE;
							}

							rt_hdl = get_client_memptr(eth_client, clt_indx)->eth_rt_hdl[tx_index].eth_rt_rule_hdl_v6_wan[num_v6];
							if(m_routing.DeleteRoutingHdl(rt_hdl, IPA_IP_v6) == false)
							{
								return IPACM_FAILURE;
							}
						}
                    }
		    } /* end of for loop */

		    /* clean the ipv6 RT rules for eth-client:clt_indx */
		    if(get_client_memptr(eth_client, clt_indx)->route_rule_set_v6 != 0) /* for ipv6 */
		    {
		        get_client_memptr(eth_client, clt_indx)->route_rule_set_v6 = 0;
            }
		}

		return IPACM_SUCCESS;
	}

	/* handle eth client initial, construct full headers (tx property) */
	int handle_eth_hdr_init(uint8_t *mac_addr);

	/* handle eth client ip-address */
	int handle_eth_client_ipaddr(ipacm_event_data_all *data);

	/* handle eth client routing rule*/
	int handle_eth_client_route_rule(uint8_t *mac_addr, ipa_ip_type iptype);

	/*handle eth client del mode*/
	int handle_eth_client_down_evt(uint8_t *mac_addr);

	/* handle odu client initial, construct full headers (tx property) */
	int handle_odu_hdr_init(uint8_t *mac_addr);

	/* handle odu default route rule configuration */
	int handle_odu_route_add();

	/* handle odu default route rule deletion */
	int handle_odu_route_del();

	/*handle lan iface down event*/
	int handle_down_evt();

	/*handle reset usb-client rt-rules */
	int handle_lan_client_reset_rt(ipa_ip_type iptype);

	/* for pcie modem */
	virtual int add_connection(int client_index, int v6_num);
	virtual int del_connection(int client_index, int v6_num);

	int construct_mtu_rule(struct ipa_flt_rule *rule, enum ipa_ip_type iptype, uint16_t mtu);
};

#endif /* IPACM_LAN_H */