nat_structures.h

vxworks下ppp的实现源码

/* nat_structures.h */

/* Copyright 2000-2003 Wind River Systems, Inc. */

/* @format.tab-size 4, @format.use-tabs true, @format.new-line lf */

/*
modification history
--------------------
01d,16jun03,myz  Added new fragment translation functions
01c,25apr03,myz  changed nat_filter_rx function's prototype.
01b,24apr03,zhu  updated copyright
01a,21apr03,myz  removed timer_dispatcher from NAT_CLASS.
040903  vks     updated Copyright info 
032603  vks     replaced rw_container with lstLib for bind_list and session_list
092502  vvv     modified fragment list for lstLib
092402  vvv     added NODE element to NAT_PASSTHRU_PAIR
092402  vvv     changed RW_CONTAINER to LIST
092302  vvv             unconditionally include fix for SPR #65740
112601	tk		Fix SPR65740: ARP problem with Basic-NAT.
100501  tk		Add an additional parameter to match_spoofed_port_with_udp_entry                and match_spoofed_port_with_tcp_entry.
100301  tk		Add match_sa_with_static_entry() declaration.
082301	tk		Add registerStaticEntryToTranslationList() declaration.
080701	tk		Add match_ports_with_udp_entry_global() and
				match_ports_with_tcp_entry_global() declaration for H.323 handling.
072601	tk		remove declaration of match_ports_with_tcp_entry() and 
				match_ports_with_udp_entry().  Add the following declarations:
				match_ports_with_tcp_entry_outbound(),
				match_ports_with_tcp_entry_inbound(),
				match_ports_with_udp_entry_outbound(),
				match_ports_with_udp_entry_inbound().
071101	tk		Add function declaration create_static_ip_entry().
052501	tk		Fix SPR#67128: Add feature to configure the Basic NAT starting global
				address by adding starting_global_address in NAT_CLASS.
				Add a boolean flag static_entry in NAT_IP_ADDRESS_ENTRY to indicate
				the nature of this address bind.
*/

#ifndef __INCnat_structuresh
#define __INCnat_structuresh

/* NAT-specific headers */
#include <nat/natAlgApi.h>

/* VxWorks specific headers */
#include <inetLib.h>
#include <net/mbuf.h>	/* struct mbuf (M_BLK) and struct ifnet definitions */

typedef	struct	SA_DA_IP_ADDRESSES
{
	IP_ADDRESS	source_address;
	IP_ADDRESS	destination_address;

} SA_DA_IP_ADDRESSES;

typedef	struct	ICMP_PACKET_DATA
{
	SA_DA_IP_ADDRESSES		addresses;
	USHORT					ip_checksum;

} ICMP_PACKET_DATA;

typedef struct ICMP_DATA
{
	ICMP_PACKET_DATA		ip_data;
	USHORT					icmp_checksum;

} ICMP_DATA;

typedef	struct	SEQUENCE_HEADER
{
	struct SEQUENCE_ENTRY	*sptr_forward_link;
	struct SEQUENCE_ENTRY	*sptr_backward_link;

} SEQUENCE_HEADER;

typedef	struct	SEQUENCE_ENTRY
{
	SEQUENCE_HEADER		link;
	ULONG				sequence_number_base;
	int					sequence_number_delta;
	ULONG				sequence_number_base_adjust;
	ULONG				entry_timer;
	bool				timer_enabled;

} SEQUENCE_ENTRY;

typedef	struct	TCP_TRANSLATION_HEADER
{
	struct TCP_TRANSLATION_ENTRY	*sptr_forward_link;
	struct TCP_TRANSLATION_ENTRY	*sptr_backward_link;

} TCP_TRANSLATION_HEADER;

typedef	struct	TCP_TRANSLATION_ENTRY
{
	TCP_TRANSLATION_HEADER					link;
	USHORT									local_port;
	USHORT									remote_port;
	USHORT									spoofed_local_port;
	IP_ADDRESS								local_address;
	IP_ADDRESS								remote_address;
	SEQUENCE_HEADER							local_sequence_delta_list;
	SEQUENCE_HEADER							global_sequence_delta_list;
	ULONG									global_sequence_number;
	ULONG									local_sequence_number;
	ULONG									local_connection_timer;
	ULONG									global_connection_timer;
	BYTE_ENUM (NAT_TCP_PORT_STATE)			local_state;
	BYTE_ENUM (NAT_TCP_PORT_STATE)			global_state;
	bool									static_entry;
	bool									dynamicFromStatic;
	u_long									bind_id;

} TCP_TRANSLATION_ENTRY;

typedef	struct	NAT_IP_ADDRESS_ENTRY
{
	IP_ADDRESS								address;
	bool									address_in_use;
	bool									static_entry;

} NAT_IP_ADDRESS_ENTRY;

typedef	struct	IP_TRANSLATION_HEADER
{
	struct IP_TRANSLATION_ENTRY *			sptr_forward_link;
	struct IP_TRANSLATION_ENTRY	*			sptr_backward_link;

} IP_TRANSLATION_HEADER;

typedef	struct	IP_TRANSLATION_ENTRY
{
	IP_TRANSLATION_HEADER					link;
	IP_ADDRESS								sa_local_address;
	IP_ADDRESS								sa_global_address;
	ULONG									time_stamp;
	NAT_IP_ADDRESS_ENTRY*					sptr_local_address_use_entry;	
	TCP_TRANSLATION_HEADER					tcp_translation_list;
	bool									static_entry;
	u_long									bind_id;	

} IP_TRANSLATION_ENTRY;

typedef	struct	UDP_TRANSLATION_HEADER
{
	struct	UDP_TRANSLATION_ENTRY *			sptr_forward_link;
	struct	UDP_TRANSLATION_ENTRY *			sptr_backward_link;

} UDP_TRANSLATION_HEADER;

typedef	struct	UDP_TRANSLATION_ENTRY
{
	UDP_TRANSLATION_HEADER					link;
	USHORT									local_port;
	USHORT									remote_port;
	USHORT									spoofed_local_port;
	IP_ADDRESS								local_address;
	IP_ADDRESS								remote_address;
	ULONG									udp_translation_entry_timer;
	bool									static_entry;
	bool									dynamicFromStatic;
	u_long									bind_id;

} UDP_TRANSLATION_ENTRY;

typedef	struct	ICMP_TRANSLATION_HEADER
{
	struct ICMP_TRANSLATION_ENTRY *			sptr_forward_link;
	struct ICMP_TRANSLATION_ENTRY *			sptr_backward_link;

} ICMP_TRANSLATION_HEADER;

typedef struct ICMP_TRANSLATION_ENTRY
{
	ICMP_TRANSLATION_HEADER					link;
	USHORT									icmp_identifier;
	USHORT									spoofed_icmp_identifier;
	IP_ADDRESS								local_address;
	ULONG									icmp_translation_entry_timer;
	u_long									bind_id;

} ICMP_TRANSLATION_ENTRY;	

typedef struct NAT_FRAGMENT_INFO
    {
    NODE                node;
    IP_ADDRESS		address_to_change;
    IP_ADDRESS		modified_address;
    USHORT		identifier;
    UINT		time_to_live;
    } NAT_FRAGMENT_INFO;

typedef	struct	NAT_IP_PORT_CLASS
{
	bool						enabled;
	bool						default_translate_enabled;
	BYTE_ENUM (NAT_PORT_TYPE)	type;
	IP_ADDRESS					address;
	IP_ADDRESS					mask;
	char						type_string[20];	/*used only for nvram config */
	char						ifname[16];
	struct ifnet*				ifunit;
} NAT_IP_PORT_CLASS;

typedef struct NAT_IP_STATIC_ENTRY
{
	IP_ADDRESS		local_address;
	IP_ADDRESS		global_address;
} NAT_IP_STATIC_ENTRY;

typedef struct NAT_PORT_STATIC_ENTRY
{
	IP_ADDRESS	local_address;
	USHORT		local_port_number;
	USHORT		global_port_number;
} NAT_PORT_STATIC_ENTRY;

/* the following contains all members necessary for RFC NAT */
typedef struct NATG_CLASS
{
	IP_TRANSLATION_HEADER			ip_translation_list;
	NAT_IP_ADDRESS_ENTRY*			global_address_pool;
	ULONG							global_address_pool_size;
	ULONG							global_address_index_start;
} NATG_CLASS;

/* the following contains all members necessary for single address NAT */
typedef struct NATS_CLASS