if.h

开放源码实时操作系统源码.

		(ifq)->ifq_tail = (m); \
	(ifq)->ifq_head = (m); \
	(ifq)->ifq_len++; \
}
#define	IF_DEQUEUE(ifq, m) { \
	(m) = (ifq)->ifq_head; \
	if (m) { \
		if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
			(ifq)->ifq_tail = 0; \
		(m)->m_nextpkt = 0; \
		(ifq)->ifq_len--; \
	} \
}
#define	IF_IS_EMPTY(ifq)	((ifq)->ifq_len == 0)

#define IFQ_ENQUEUE(ifq, m, pattr, err)                                 \
do {                                                                    \
        if (IF_QFULL((ifq))) {                                          \
                m_freem((m));                                           \
                (err) = ENOBUFS;                                        \
        } else {                                                        \
                IF_ENQUEUE((ifq), (m));                                 \
                (err) = 0;                                              \
        }                                                               \
        if ((err))                                                      \
                (ifq)->ifq_drops++;                                     \
} while (0)

#define	IFQ_MAXLEN	50
#define	IFNET_SLOWHZ	1		/* granularity is 1 second */

/*
 * The ifaddr structure contains information about one address
 * of an interface.  They are maintained by the different address families,
 * are allocated and attached when an address is set, and are linked
 * together so all addresses for an interface can be located.
 */
struct ifaddr {
	struct	sockaddr *ifa_addr;	/* address of interface */
	struct	sockaddr *ifa_dstaddr;	/* other end of p-to-p link */
#define	ifa_broadaddr	ifa_dstaddr	/* broadcast address interface */
	struct	sockaddr *ifa_netmask;	/* used to determine subnet */
	struct	ifnet *ifa_ifp;		/* back-pointer to interface */
	TAILQ_ENTRY(ifaddr) ifa_list;	/* list of addresses for interface */
	void	(*ifa_rtrequest)	/* check or clean routes (+ or -)'d */
		    __P((int, struct rtentry *, struct sockaddr *));
	u_short	ifa_flags;		/* mostly rt_flags for cloning */
	u_int	ifa_refcnt;		/* count of references */
	int	ifa_metric;		/* cost of going out this interface */
};
#define	IFA_ROUTE	RTF_UP		/* route installed */

/*
 * The prefix structure contains information about one prefix
 * of an interface.  They are maintained by the different address families,
 * are allocated and attached when an prefix or an address is set,
 * and are linked together so all prfefixes for an interface can be located.
 */
struct ifprefix {
	struct	sockaddr *ifpr_prefix;	/* prefix of interface */
	struct	ifnet *ifpr_ifp;	/* back-pointer to interface */
	struct ifprefix *ifpr_next;
	u_char	ifpr_plen;		/* prefix length in bits */
	u_char	ifpr_type;		/* protocol dependent prefix type */
};

/*
 * Message format for use in obtaining information about interfaces
 * from sysctl and the routing socket.
 */
struct if_msghdr {
	u_short	ifm_msglen;	/* to skip over non-understood messages */
	u_char	ifm_version;	/* future binary compatability */
	u_char	ifm_type;	/* message type */
	int	ifm_addrs;	/* like rtm_addrs */
	int	ifm_flags;	/* value of if_flags */
	u_short	ifm_index;	/* index for associated ifp */
	struct	if_data ifm_data;/* statistics and other data about if */
};

/*
 * Message format for use in obtaining information about interface addresses
 * from sysctl and the routing socket.
 */
struct ifa_msghdr {
	u_short	ifam_msglen;	/* to skip over non-understood messages */
	u_char	ifam_version;	/* future binary compatability */
	u_char	ifam_type;	/* message type */
	int	ifam_addrs;	/* like rtm_addrs */
	int	ifam_flags;	/* value of ifa_flags */
	u_short	ifam_index;	/* index for associated ifp */
	int	ifam_metric;	/* value of ifa_metric */
};

/*
 * Interface request structure used for socket
 * ioctl's.  All interface ioctl's must have parameter
 * definitions which begin with ifr_name.  The
 * remainder may be interface specific.
 */
struct	ifreq {
#define IFHWADDRLEN  6
	char	ifr_name[IFNAMSIZ];		/* if name, e.g. "en0" */
	union {
		struct	sockaddr ifru_addr;
		struct	sockaddr ifru_dstaddr;
		struct	sockaddr ifru_broadaddr;
		struct	sockaddr ifru_hwaddr;
		short	ifru_flags;
		int	ifru_metric;
		caddr_t	ifru_data;
	} ifr_ifru;
#define	ifr_addr	ifr_ifru.ifru_addr	/* address */
#define	ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address */
#define	ifr_dstaddr	ifr_ifru.ifru_dstaddr	/* other end of p-to-p link */
#define	ifr_broadaddr	ifr_ifru.ifru_broadaddr	/* broadcast address */
#define	ifr_flags	ifr_ifru.ifru_flags	/* flags */
#define	ifr_metric	ifr_ifru.ifru_metric	/* metric */
#define	ifr_media	ifr_ifru.ifru_metric	/* media options (overload) */
#define	ifr_data	ifr_ifru.ifru_data	/* for use by interface */
};

struct ifaliasreq {
	char	ifra_name[IFNAMSIZ];		/* if name, e.g. "en0" */
	struct	sockaddr ifra_addr;
	struct	sockaddr ifra_dstaddr;
#define	ifra_broadaddr	ifra_dstaddr
	struct	sockaddr ifra_mask;
};

struct ifmediareq {
	char	ifm_name[IFNAMSIZ];		/* if name, e.g. "en0" */
	int	ifm_current;			/* current media options */
	int	ifm_mask;			/* don't care mask */
	int	ifm_status;			/* media status */
	int	ifm_active;			/* active options */ 
	int	ifm_count;			/* # entries in ifm_ulist
							array */
	int	*ifm_ulist;			/* media words */
};

/*
 * Structure used in SIOCGIFCONF request.
 * Used to retrieve interface configuration
 * for machine (useful for programs which
 * must know all networks accessible).
 */
struct	ifconf {
	int	ifc_len;		/* size of associated buffer */
	union {
		caddr_t	ifcu_buf;
		struct	ifreq *ifcu_req;
	} ifc_ifcu;
#define	ifc_buf	ifc_ifcu.ifcu_buf	/* buffer address */
#define	ifc_req	ifc_ifcu.ifcu_req	/* array of structures returned */
};

/*
 * Structure for SIOC[AGD]LIFADDR
 */
struct if_laddrreq {
	char iflr_name[IFNAMSIZ];
	unsigned int flags;
#define IFLR_PREFIX	0x8000	/* in: prefix given  out: kernel fills id */
	unsigned int prefixlen;		/* in/out */
	struct sockaddr_storage addr;	/* in/out */
	struct sockaddr_storage dstaddr; /* out */
};

struct if_nameindex {
	unsigned int	if_index;
	char 		*if_name;
};

#ifndef _KERNEL
__BEGIN_DECLS
unsigned int if_nametoindex __P((const char *));
char 	*if_indextoname __P((unsigned int, char *));
struct	if_nameindex *if_nameindex __P((void));
__END_DECLS
#define if_freenameindex(x)	free(x)
#endif

#include <net/if_arp.h>

#ifdef _KERNEL
#define	IFAFREE(ifa) { \
	if ((ifa)->ifa_refcnt <= 0) \
		ifafree(ifa); \
	else \
		(ifa)->ifa_refcnt--; \
	}

struct ifnet_head ifnet;
struct ifnet **ifindex2ifnet;
#if 0
struct ifnet loif[];
#endif
int if_index;

void	ether_ifattach __P((struct ifnet *));
void	ether_ifdetach __P((struct ifnet *));
int	ether_ioctl __P((struct ifnet *, struct arpcom *, u_long, caddr_t));
void	ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
int	ether_output __P((struct ifnet *,
	   struct mbuf *, struct sockaddr *, struct rtentry *));
char	*ether_sprintf __P((u_char *));

void	if_attach __P((struct ifnet *));
void	if_attachtail __P((struct ifnet *));
void	if_attachhead __P((struct ifnet *));
void	if_detach __P((struct ifnet *));
void	if_down __P((struct ifnet *));
void	if_qflush __P((struct ifqueue *));
void	if_slowtimo __P((void *));
void	if_up __P((struct ifnet *));
int	ifconf __P((u_long, caddr_t));
void	ifinit __P((void));
int	ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
int	ifpromisc __P((struct ifnet *, int));
struct	ifnet *ifunit __P((char *));
struct  ifnet *if_withname __P((struct sockaddr *));

struct	ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
struct	ifaddr *ifa_ifwithaf __P((int));
struct	ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
struct	ifaddr *ifa_ifwithnet __P((struct sockaddr *));
struct	ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
					struct sockaddr *));
struct	ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
void	ifafree __P((struct ifaddr *));
void	link_rtrequest __P((int, struct rtentry *, struct sockaddr *));

int	loioctl __P((struct ifnet *, u_long, caddr_t));
void	loopattach __P((int));
int	looutput __P((struct ifnet *,
	   struct mbuf *, struct sockaddr *, struct rtentry *));
void	lortrequest __P((int, struct rtentry *, struct sockaddr *));
#endif /* _KERNEL */

#endif // _NET_IF_H_