netdev.h

用于嵌入式系统的TCP/IP协议栈及若干服务

#endif 
} st_blk;

/* macros to handle multiple IPA addresses on one interface */
#define VLAN_SHIFT	0	/* up to 3 */
#define MAX_VLAN	(1<<VLAN_SHIFT)
/* macros to map ndp to Rip or OSPF circuits */
#define ndp_2_cid(ndp)		(((int)ndp->nd_ix+1)<<VLAN_SHIFT)
#define cid_2_ndix(cid)		(((int)cid>>VLAN_SHIFT)-1)


/* net device switch */
typedef struct netdev {
	char    nd_name[MAX_DEV_NAME];  /* device name */
	u16     nd_devid;       /* Minor device id, ie a board # */
	u16     nd_xflags;  /* Filler field */
	u32     nd_p0;      /* device specific init values */
	u32     nd_p1;
	u32     nd_p2;
	u32     nd_p3;
	so_addr	nd_lladdr;  /* link layer address of board - user fills in address family
                           in device table.  Fusion queries device driver for link
                           layer address.
                        */
	int (* nd_init)(struct netdev * ndp);
	int (* nd_updown)(struct netdev * ndp, u16 flags, char * options);
	st  (* nd_send)(struct m * mp);
	int (* nd_start)(struct m * mp);
	int (* nd_ioctl)(struct netdev * ndp, int cmnd, char * addr);

	/*********************************************************************
	 * NOTE: Everything below this line must stay there.  Any new fields
	 * which require OEM initialization must be added above this line and
	 * macros for devtable.h must be created for them (see below).  Fields which
	 * which can be initialized to 0 and wouldn't require OEM initialization
	 * go below this line.  See example devtable.h for device table
	 * declaration.  CAUTION: Care MUST be taken to keep the order of entries
     * in devtable.h and the netdev structure the same.
	 */
	u16     nd_flags;       /* Flags */
	u16     nd_ix;          /* 'ndp_tbl' index (back ptr) - initialized by Fusion */
	st_blk	nd_stat;        /* statistics */
	u32	    nd_ipas[MAX_VLAN]; /* ipa addresses for this physical link */
	u32	    nd_ipmasks[MAX_VLAN]; /* parallel subnet mask */
	int	    nd_ipmtu;	    /* IP MTU */
	u32	    nd_ifspeed;		/* Interface Speed */
	u32	    nd_ospfarea;    /* maningful for OSPF area only */
	q       nd_xmitq;       /* Transmit message queue for messages that have been
	                           submitted to the driver and for which transmit 
	                           completion notifications are being awaited. Used
	                           only if F_N_PRESERVE_MSG flag is set. */

    /* The following three fields are used only if the driver has a limited capacity
	   to inernally queue outgoing messages (i.e., the F_N_IMMEDIATE flag is not set */
	q		nd_holdq;       /* Queue to hold messages which cannot be submitted to
							   the driver because we've maxed out on the capacity of 
							   the driver to internally queue messages (nd_txpendlimit) */
	int     nd_txpendlimit; /* Maximum number of outstanding "packets" that can be 
							   submitted to the driver. */
	int     nd_txnumpending; /* The number of outgoing packets presently pending 
							    transmission by the driver. This field is touched
								only by Fusion, driver should not touch it. */
	struct so_t * nd_sop;   /* Socket backptr. for RAW stuff */
	struct netdev   * nd_next;  /* Link to next similar device */
#ifdef LWQ
	struct  m   ** nd_mlist;/* preallocated receive buffers */
	int	    nd_lpkts;       /* # of large preallocated buffers */
	int	    nd_spkts;       /* # of small preallocated buffers */
	q	    nd_recvq;       /* receive queue */
#endif
	dsu	    nd_dsu;     /* Device board specific union */
#ifdef IGMP_PROTOCOL
	addr_list	nd_multiaddr;  /* pointer to multicast addr. list */
    u16     nd_mcast_addr_count;  /* Number of addresses in the list.  May be used
                                  by the driver to know when to enable/disable 
                                  reception of multicast packets.
                                */
   	u8	    v1_router_present; /* Set to true (1) if a v1 router is present */
	tcb		*v1_router_tcb;	   /* TCB for v1 router present timeout */
#endif
} netdev;

/* Macros for devtable.h used to enter OEM specific required values into
 * the device table for each device.
 */
#define NIL_DEV_NAME   " "

#define  DEV_ADDRESS_FAMILY 0 /* Just a place holder for clarity */


int loopback_driver_init (struct netdev * ndp);
int loopback_driver_updown(struct netdev * ndp, u16 flags, char * options);
int loopback_driver_ioctl(struct netdev * ndp, int cmnd, char * addr);
st  loopback_driver_send (struct m * mp);
int loopback_driver_start (struct m * mp);

#ifndef MAX_RUNTIME_DEVICES
#ifdef PPPOE_PROTOCOL
#define MAX_RUNTIME_DEVICES     16  /* PPPoE default = 16 extra devices */
#else
#define MAX_RUNTIME_DEVICES     0   /* non PPPoE default = 0 */
#endif
#endif

/* Just to keep example in table from compiling */
#define  FNS_DEVICE_TABLE_TEMPLATE_ENTRY( a )        

#define  FNS_STR_DEV_NAME(a)                    a, 
#define  FNS_U16_DEV_MINOR_ID(a)                (u16)a,
#define  FNS_U16_DEV_XFLAGS(a)                  (u16)a, 
#define  FNS_U32_DEV_OEM_FIELD1(a)              (u32)a, 
#define  FNS_U32_DEV_OEM_FIELD2(a)              (u32)a, 
#define  FNS_U32_DEV_OEM_FIELD3(a)              (u32)a, 
#define  FNS_U32_DEV_OEM_FIELD4(a)              (u32)a,
#define  FNS_U16_DEV_ADDRESS_FAMILY(a)          {a, 0},
#define  FNS_FPTR_DEV_INIT(a)                   a,
#define  FNS_FPTR_DEV_UPDOWN(a)                 a,
#define  FNS_FPTR_DEV_SEND(a)                   a,
#define  FNS_FPTR_DEV_TX_START(a)               a,
#define  FNS_FPTR_DEV_IOCTL(a)                  a,

#ifdef __FUSION_NCDEV_C__

/* The device table only compiles into ncdev.c */

/* See note above regarding BEGIN_FUSION_DEVICE_TABLE and END_FUSION_DEVICE_TABLE macros.
*/

#define  FUSION_DEVICE_TABLE(a) export netdev ndevsw[] = { \
{"im", 0, 0, 0, 0, 0, 0, {AF_INTRA,0}, noent_init, noent_updown, im_send, noent_start, noent_ioctl }, \
{"lo", 0, 0, 0, 0, 0, 0, {AF_LOOPBACK}, loopback_driver_init, loopback_driver_updown, \
  loopback_driver_send, loopback_driver_start, loopback_driver_ioctl}, \
  a \
};

#define  BEGIN_FUSION_DEVICE_TABLE export netdev ndevsw[] = { \
    {"im", 0, 0, 0, 0, 0, 0, {AF_INTRA,0}, noent_init, noent_updown, im_send, noent_start, noent_ioctl }, \
	{"lo", 0, 0, 0, 0, 0, 0, {AF_LOOPBACK}, loopback_driver_init, loopback_driver_updown, \
		loopback_driver_send, loopback_driver_start, loopback_driver_ioctl}, \


/* END_FUSION_DEVICE_TABLE */
#define END_FUSION_DEVICE_TABLE	};

/* NOTE:  As discussed above, the following macros are considered deprecated.
          See the new devtable.hhh.
*/

#ifdef SLIP_PROTOCOL 
#define FUSION_GENERIC_SLIP_DEVICE_ENTRY(a) {a},
#else
#define FUSION_GENERIC_SLIP_DEVICE_ENTRY(a) 
#endif

#ifdef PPP_PROTOCOL 
#define FUSION_GENERIC_PPP_DEVICE_ENTRY(a) {a},
#else
#define FUSION_GENERIC_PPP_DEVICE_ENTRY(a) 
#endif

#ifdef ETHER_PROTOCOL 
#define FUSION_GENERIC_ETHER_DEVICE_ENTRY(a) {a},
#else
#define FUSION_GENERIC_ETHER_DEVICE_ENTRY(a) 
#endif

/* Generic entry for devices other than Ethernet, SLIP, and PPP 
   NOTE:  As discussed above, the following macros are considered deprecated.
          See the new devtable.hhh.
*/

#define  FUSION_DEVICE_TABLE_ENTRY(a) {a}, 

#define  BEGIN_FUSION_DEVICE_TABLE_ENTRY {
#define  END_FUSION_DEVICE_TABLE_ENTRY },

#endif /* __FUSION_NCDEV_C__ */

#endif /* _NETDEV_ */