psu.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/20 10:19:23 $
*  $Source: M:/psisrc/stack/incl/rcs/psu.h $
*  $Revision: 1.8 $
**************************************************************************
*  File Description:  PSU (Protocol Specific Union)
*
**************************************************************************/

#ifndef _PSU_
#define _PSU_

#include "config.h"
#include "ccdep.h"
#include "q.h"
#include "std.h"
#include "timer.h"
#include "socket.h"
#include "dsu.h"

/* Protocol specific structures and their union */

/* Transmission Control Protocol Specific Union */
typedef struct {
	struct tcpsv_t  * tsv_s;        /* pointer to the TCP state vector */
	u32     tsv_seqno;
	u16     tsv_src_port;       /* added 4 Windows NT connect problem RS 3/98 */
} tcppsu_t;

/* handle to the state vector from a socket */
#define so_svp  so_psu.dpu_state.dpsu_u.dpsu_utcp.tsv_s
/* handle to the connecting peer's tcp seqno from a socket */
#define so_seqno        so_psu.dpu_state.dpsu_u.dpsu_utcp.tsv_seqno
#define so_src_port     so_psu.dpu_state.dpsu_u.dpsu_utcp.tsv_src_port /* RS 3/98 */



/* IP security compartment */

#define IPS_SEC     0               /* security, 2 bytes */
#define IPS_CMP     IPS_SEC+2       /* compartments, 2 bytes */
#define IPS_HR      IPS_CMP+2       /* handling restrictions, 2 bytes */
#define IPS_TCC     IPS_HR+2        /* transmission control code (24 bits) 4 bytes*/
#define SIZEOF_IPS_T  (IPS_TCC+4)

typedef struct {
    u8  array[SIZEOF_IPS_T];
} ips_t;


/* IP routing structure */
typedef struct {
	u16     ipr_size;       /* # of route slots to be allocated */
	u32     ipr_addr[9];    /* max # of routes */
} ipsr_t;

/* IP timestamp structure */
typedef struct {
	u16     ipt_size;       /* # of slots allocated */
	u16     ipt_type;       /* overflow/type field */
	u32     ipt_addr[9];    /* max # of datems */
} ipst_t;

/* Internet Protocol Specific Union */
typedef struct {
	u16     ipsu_flags;     /* IP control flags */
	u16     ipsu_size;      /* Total # of bytes in option field */
	u8      ipsu_tos;       /* type of service for outgoing packets */
	u8      ipsu_ttl;       /* time-to-live for outgoing packets */
	u8      ipsu_mnttl;     /* min time-to-live */
	u8      ipsu_mxttl;     /* max time-to-live */
	u16     ipsu_sid;       /* stream id */
	u16     ipsu_rsid;      /* recorded stream id */
	ips_t   ipsu_sec;       /* security:compartment:handling:tcc */
	ipsr_t  ipsu_route;     /* current route */
	ipsr_t  ipsu_rroute;    /* recorded route */
	ipst_t  ipsu_time;      /* timestamp info */
	ipst_t  ipsu_rtime;     /* recored timestamp info */
} ipsu_t;

/* Definitions of IP option control flags */
/* Flags set by 'setsopt' */
#define IP_P_DF         0x0001  /* Don't Fragment */
#define IP_P_SID        0x0002  /* Insert Stream ID */

#define IP_P_NR         0x0000  /* No route option in effect */
#define IP_P_LS         0x0004  /* Loose route option in effect */
#define IP_P_SS         0x0008  /* Strict route option in effect */
#define IP_P_RR         0x000C  /* Record route option in effect */
#define IP_P_ROUTE      0x000C  /* Route type Mask */

#define IP_P_SECURE     0x0010  /* Insert Security option */
#define IP_P_TIME       0x0020  /* Insert Timestamp option */

/* Flags referenced by 'getsopt' (set by incoming packets) */

#define IP_P_RSID       0x0040  /* Stream ID received and recorded */

#define IP_P_RNR        0x0000  /* received no route */
#define IP_P_RLS        0x0080  /* received loose route */
#define IP_P_RSS        0x0100  /* received strict route */
#define IP_P_RRR        0x0180  /* received recorded route */
#define IP_P_RROUTE     0x0180  /* route received and recorded mask */

#define IP_P_RTS        0x0200  /* received time stamp */

/* Darpa Protocols Specific Union */
typedef struct {
	ipsu_t  dpsu_ip;                /* IP */
	union { /* union of darpa protocols */
		tcppsu_t        dpsu_utcp;      /* TCP */
	} dpsu_u;
} dpsu_t;

/* Intra machine protocol */
typedef struct  iasu {
	u32     ia_flags;
	u32     ia_id;
	st      (*ia_rfn)(struct m * mp); /* fn to place into receive queue */
	char    * ia_ppad1;
} iasu;


typedef union {
	iasu    ia_state;
	dpsu_t  dpu_state;
} psu;

/* End of packed structures */

#endif  /*_PSU_*/