netif.h

来自「TCP-IP红宝书源代码」· C头文件 代码 · 共 76 行

/* netif.h - NIGET */

#define	NI_MAXHWA 14			/* max size of any hardware	*/
					/*  (physical) net address	*/
struct	hwa	{			/* a hardware address		*/
	int		ha_len;		/* length of this address	*/
	unsigned char	ha_addr[NI_MAXHWA]; 	/* the address		*/
};

#define	NI_INQSZ	30		/* interface input queue size	*/
#define	NETNLEN		30		/* length of network name	*/

#define	NI_LOCAL	0		/* index of local interface	*/
#define	NI_PRIMARY	1		/* index of primary interface	*/

#define	NI_MADD		0		/* add multicast (ni_mcast)	*/
#define	NI_MDEL		1		/* delete multicast (ni_mcast)	*/

/* interface states */

#define	NIS_UP		0x1
#define	NIS_DOWN	0x2
#define	NIS_TESTING	0x3

/* Definitions of network interface structure (one per interface)	*/

struct	netif {				/* info about one net interface	*/
	char		ni_name[NETNLEN]; /* domain name of interface	*/
	char		ni_state;	/* interface states: NIS_ above	*/
	IPaddr		ni_ip;		/* IP address for this interface*/
	IPaddr		ni_net;		/* network IP address		*/
	IPaddr		ni_subnet;	/* subnetwork IP address	*/
	IPaddr		ni_mask;	/* IP subnet mask for interface	*/
	IPaddr		ni_brc;		/* IP broadcast address		*/
	IPaddr		ni_nbrc;	/* IP net broadcast address	*/
	unsigned int	ni_mtu;		/* max transfer unit (bytes)	*/
	unsigned int	ni_hwtype;	/* hardware type (for ARP)	*/
	struct	hwa	ni_hwa;		/* hardware address of interface*/
	struct	hwa	ni_hwb;		/* hardware broadcast address	*/
					/* multicast add/delete func.	*/
	int		(*ni_mcast)(int op,int dev,Eaddr hwa,IPaddr ipa);
	Bool		ni_ivalid;	/* is ni_ip valid?		*/
	Bool		ni_nvalid;	/* is ni_name valid?		*/
	Bool		ni_svalid;	/* is ni_subnet valid?		*/
	int		ni_dev;		/* the Xinu device descriptor	*/
	int		ni_ipinq;	/* IP input queue		*/
	int		ni_outq;	/* (device) output queue	*/
	/* Interface MIB */
	char		*ni_descr;	/* text description of hardware */
	int		ni_mtype;	/* MIB interface type		*/
	long		ni_speed;	/* bits per second		*/
	char		ni_admstate;	/* administrative status (NIS_*)*/
	long		ni_lastchange;	/* last state change (1/100 sec)*/
	long		ni_ioctets;	/* # of octets received		*/
	long		ni_iucast;	/* # of unicast received	*/
	long		ni_inucast;	/* # of non-unicast received	*/
	long		ni_idiscard;	/* # dropped - output queue full*/
	long		ni_ierrors;	/* # input packet errors	*/
	long		ni_iunkproto;	/* # in packets for unk. protos */
	long		ni_ooctets;	/* # of octets sent		*/
	long		ni_oucast;	/* # of unicast sent		*/
	long		ni_onucast;	/* # of non-unicast sent	*/
	long		ni_odiscard;	/* # output packets discarded	*/
	long		ni_oerrors;	/* # output packet errors	*/
	long		ni_oqlen;	/* output queue length		*/
	long		ni_maxreasm;	/* max datagram can reassemble	*/
};

#define	NIGET(ifn)	((struct ep *)deq(nif[ifn].ni_ipinq))

#define	NIF	Neth+Noth+1		/* # of interfaces, +1 for local*/

extern struct netif	nif[];

int netwrite(struct netif *, struct ep *, unsigned);