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- #ifndef _IFACE_H
- #define _IFACE_H
-
- #ifndef _GLOBAL_H
- #include "global.h"
- #endif
-
- #ifndef _MBUF_H
- #include "mbuf.h"
- #endif
-
- #ifndef _PROC_H
- #include "proc.h"
- #endif
-
- /* Interface control structure */
- struct iface {
- struct iface *next; /* Linked list pointer */
- char *name; /* Ascii string with interface name */
- int type; /* Link header type for phdr */
- struct iftype *iftype; /* Pointer to appropriate iftype entry */
-
- int32 addr; /* IP address */
- int32 broadcast; /* Broadcast address */
- int32 netmask; /* Network mask */
-
- /* To device -- control */
- int32 (*ioctl) __ARGS((struct iface *,int cmd,int set,int32 val));
- /* From device -- when status changes */
- int (*iostatus) __ARGS((struct iface *,int cmd,int32 val));
- /* Encapsulate an IP datagram */
- int (*send) __ARGS((struct mbuf *,struct iface *,int32,int,int,int,int));
- /* Encapsulate any link packet */
- int (*output) __ARGS((struct iface *,char *,char *,int16,struct mbuf *));
- /* Send raw packet */
- int (*raw) __ARGS((struct iface *,struct mbuf *));
- /* Call before detaching */
- int (*stop) __ARGS((struct iface *));
- /* Display status */
- int (*status) __ARGS((struct iface *));
-
- int16 mtu; /* Maximum transmission unit size */
- int dev; /* Subdevice number to pass to send */
- int xdev; /* Associated Slip or Nrs channel, if any */
- int16 flags; /* Configuration flags */
- #define DATAGRAM_MODE 0 /* Send datagrams in raw link frames */
- #define CONNECT_MODE 1 /* Send datagrams in connected mode */
-
- int16 trace; /* Trace flags */
- #define IF_TRACE_OUT 0x01 /* Output packets */
- #define IF_TRACE_IN 0x10 /* Packets to me except broadcast */
- #define IF_TRACE_ASCII 0x100 /* Dump packets in ascii */
- #define IF_TRACE_HEX 0x200 /* Dump packets in hex/ascii */
- #define IF_TRACE_NOBC 0x1000 /* Suppress broadcasts */
- #define IF_TRACE_RAW 0x2000 /* Raw dump, if supported */
- char *trfile; /* Trace file name, if any */
- FILE *trfp; /* Stream to trace to */
-
- char *hwaddr; /* Device hardware address, if any */
- struct iface *forw; /* Forwarding interface for output, if rx only */
-
- int32 ipsndcnt; /* IP datagrams sent */
- int32 rawsndcnt; /* Raw packets sent */
- int32 iprecvcnt; /* IP datagrams received */
- int32 rawrecvcnt; /* Raw packets received */
- int32 lastsent; /* Clock time of last send */
- int32 lastrecv; /* Clock time of last receive */
-
- struct proc *rxproc; /* Receiver process, if any */
- struct proc *txproc; /* Transmitter process, if any */
- struct proc *supv; /* Supervisory process, if any */
-
- void *extension; /* Pointer to protocol extension block, if any */
-
- /* encapsulation discard */
- int (*discard) __ARGS((struct iface *,struct mbuf *));
- /* encapsulation echo */
- int (*echo) __ARGS((struct iface *,struct mbuf *));
- };
- #define NULLIF (struct iface *)0
- extern struct iface *Ifaces; /* Head of interface list */
- extern struct iface Loopback; /* Optional loopback interface */
- extern struct iface Encap; /* IP-in-IP pseudo interface */
-
- /* Header put on front of each packet in input queue */
- struct phdr {
- struct iface *iface;
- unsigned short type; /* Use pktdrvr "class" values */
- };
- extern char Noipaddr[];
- extern struct mbuf *Hopper;
-
- /* Interface encapsulation mode table entry. An array of these structures
- * are initialized in config.c with all of the information necessary
- * to attach a device.
- */
- struct iftype {
- char *name; /* Name of encapsulation technique */
- int (*send) __ARGS((struct mbuf *,struct iface *,int32,int,int,int,int));
- /* Routine to send an IP datagram */
- int (*output) __ARGS((struct iface *,char *,char *,int16,struct mbuf *));
- /* Routine to send link packet */
- char *(*format) __ARGS((char *,char *));
- /* Function that formats addresses */
- int (*scan) __ARGS((char *,char *));
- /* Reverse of format */
- int type; /* Type field for network process */
- int hwalen; /* Length of hardware address, if any */
- };
- #define NULLIFT (struct iftype *)0
- extern struct iftype Iftypes[];
-
- /* In iface.c: */
- struct iface *if_lookup __ARGS((char *name));
- struct iface *ismyaddr __ARGS((int32 addr));
- int if_detach __ARGS((struct iface *ifp));
- int setencap __ARGS((struct iface *ifp,char *mode));
- char *if_name __ARGS((struct iface *ifp,char *comment));
- int bitbucket __ARGS((struct iface *ifp,struct mbuf *bp));
-
- /* In config.c: */
- int net_route __ARGS((struct iface *ifp,int type,struct mbuf *bp));
-
- #endif /* _IFACE_H */
-