7c399a896a
of limited utility. In their place, add bunch of pointers which will eventually be needed by the polled-interrupt scheme we're working here. (It will probably be a while before the code is written and committed here.) At the same time, a `void *if_softc' field was added to the beginning of the structure to make certain driver writers happier. The practical upshot of all this is that you need to recompile utilities such as netstat which manipulate struct ifnet.
404 lines
14 KiB
C
404 lines
14 KiB
C
/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if.h 8.1 (Berkeley) 6/10/93
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* $Id: if.h,v 1.26 1996/01/26 09:29:17 phk Exp $
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*/
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#ifndef _NET_IF_H_
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#define _NET_IF_H_
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/*
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* Structures defining a network interface, providing a packet
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* transport mechanism (ala level 0 of the PUP protocols).
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*
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* Each interface accepts output datagrams of a specified maximum
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* length, and provides higher level routines with input datagrams
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* received from its medium.
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*
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* Output occurs when the routine if_output is called, with three parameters:
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* (*ifp->if_output)(ifp, m, dst, rt)
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* Here m is the mbuf chain to be sent and dst is the destination address.
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* The output routine encapsulates the supplied datagram if necessary,
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* and then transmits it on its medium.
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*
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* On input, each interface unwraps the data received by it, and either
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* places it on the input queue of a internetwork datagram routine
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* and posts the associated software interrupt, or passes the datagram to a raw
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* packet input routine.
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*
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* Routines exist for locating interfaces by their addresses
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* or for locating a interface on a certain network, as well as more general
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* routing and gateway routines maintaining information used to locate
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* interfaces. These routines live in the files if.c and route.c
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*/
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#include <sys/socket.h> /* for struct sockaddr */
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#ifndef _TIME_ /* XXX fast fix for SNMP, going away soon */
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#include <sys/time.h>
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#endif
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#ifdef __STDC__
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/*
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* Forward structure declarations for function prototypes [sic].
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*/
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struct mbuf;
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struct proc;
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struct rtentry;
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struct socket;
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struct ether_header;
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#endif
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struct if_data {
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/* generic interface information */
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u_char ifi_type; /* ethernet, tokenring, etc */
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u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */
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u_char ifi_addrlen; /* media address length */
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u_char ifi_hdrlen; /* media header length */
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u_long ifi_mtu; /* maximum transmission unit */
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u_long ifi_metric; /* routing metric (external only) */
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u_long ifi_baudrate; /* linespeed */
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/* volatile statistics */
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u_long ifi_ipackets; /* packets received on interface */
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u_long ifi_ierrors; /* input errors on interface */
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u_long ifi_opackets; /* packets sent on interface */
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u_long ifi_oerrors; /* output errors on interface */
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u_long ifi_collisions; /* collisions on csma interfaces */
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u_long ifi_ibytes; /* total number of octets received */
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u_long ifi_obytes; /* total number of octets sent */
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u_long ifi_imcasts; /* packets received via multicast */
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u_long ifi_omcasts; /* packets sent via multicast */
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u_long ifi_iqdrops; /* dropped on input, this interface */
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u_long ifi_noproto; /* destined for unsupported protocol */
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struct timeval ifi_lastchange; /* last updated */
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};
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/*
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* Structure defining a queue for a network interface.
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*
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* (Would like to call this struct ``if'', but C isn't PL/1.)
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*/
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struct ifqueue {
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struct mbuf *ifq_head;
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struct mbuf *ifq_tail;
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int ifq_len;
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int ifq_maxlen;
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int ifq_drops;
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};
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/*
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* Structure describing information about an interface
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* which may be of interest to management entities.
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*/
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struct ifnet {
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void *if_softc; /* pointer to driver state */
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char *if_name; /* name, e.g. ``en'' or ``lo'' */
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struct ifnet *if_next; /* all struct ifnets are chained */
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struct ifaddr *if_addrlist; /* linked list of addresses per if */
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int if_pcount; /* number of promiscuous listeners */
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caddr_t if_bpf; /* packet filter structure */
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u_short if_index; /* numeric abbreviation for this if */
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short if_unit; /* sub-unit for lower level driver */
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short if_timer; /* time 'til if_watchdog called */
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short if_flags; /* up/down, broadcast, etc. */
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u_char if_recvquota, if_sendquota; /* quotas for send, receive */
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u_char if_ipending; /* interrupts pending */
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struct if_data if_data;
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/* procedure handles */
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int (*if_output) /* output routine (enqueue) */
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__P((struct ifnet *, struct mbuf *, struct sockaddr *,
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struct rtentry *));
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void (*if_start) /* initiate output routine */
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__P((struct ifnet *));
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int (*if_done) /* output complete routine */
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__P((struct ifnet *)); /* (XXX not used; fake prototype) */
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int (*if_ioctl) /* ioctl routine */
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__P((struct ifnet *, int, caddr_t));
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void (*if_watchdog) /* timer routine */
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__P((struct ifnet *));
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void (*if_poll_recv) /* polled receive routine */
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__P((struct ifnet *, int *));
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void (*if_poll_xmit) /* polled transmit routine */
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__P((struct ifnet *, int *));
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void (*if_poll_intren) /* polled interrupt reenable routine */
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__P((struct ifnet *));
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void (*if_poll_slowinput) /* input routine for slow devices */
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__P((struct ifnet *, struct mbuf *));
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struct ifqueue if_snd; /* output queue */
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struct ifqueue *if_poll_slowq; /* input queue for slow devices */
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};
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#define if_mtu if_data.ifi_mtu
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#define if_type if_data.ifi_type
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#define if_physical if_data.ifi_physical
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#define if_addrlen if_data.ifi_addrlen
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#define if_hdrlen if_data.ifi_hdrlen
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#define if_metric if_data.ifi_metric
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#define if_baudrate if_data.ifi_baudrate
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#define if_ipackets if_data.ifi_ipackets
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#define if_ierrors if_data.ifi_ierrors
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#define if_opackets if_data.ifi_opackets
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#define if_oerrors if_data.ifi_oerrors
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#define if_collisions if_data.ifi_collisions
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#define if_ibytes if_data.ifi_ibytes
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#define if_obytes if_data.ifi_obytes
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#define if_imcasts if_data.ifi_imcasts
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#define if_omcasts if_data.ifi_omcasts
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#define if_iqdrops if_data.ifi_iqdrops
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#define if_noproto if_data.ifi_noproto
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#define if_lastchange if_data.ifi_lastchange
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#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0)
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#define IFF_UP 0x1 /* interface is up */
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#define IFF_BROADCAST 0x2 /* broadcast address valid */
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#define IFF_DEBUG 0x4 /* turn on debugging */
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#define IFF_LOOPBACK 0x8 /* is a loopback net */
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#define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */
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/*#define IFF_NOTRAILERS 0x20 * obsolete: avoid use of trailers */
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#define IFF_RUNNING 0x40 /* resources allocated */
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#define IFF_NOARP 0x80 /* no address resolution protocol */
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#define IFF_PROMISC 0x100 /* receive all packets */
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#define IFF_ALLMULTI 0x200 /* receive all multicast packets */
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#define IFF_OACTIVE 0x400 /* transmission in progress */
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#define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
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#define IFF_LINK0 0x1000 /* per link layer defined bit */
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#define IFF_LINK1 0x2000 /* per link layer defined bit */
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#define IFF_LINK2 0x4000 /* per link layer defined bit */
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#define IFF_ALTPHYS IFF_LINK2 /* use alternate physical connection */
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#define IFF_MULTICAST 0x8000 /* supports multicast */
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/* flags set internally only: */
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#define IFF_CANTCHANGE \
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(IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
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IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI)
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/*
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* These really don't belong here, but there's no other obviously appropriate
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* location.
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*/
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#define IFP_AUI 0
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#define IFP_10BASE2 1
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#define IFP_10BASET 2
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/* etc. */
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/*
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* Bit values in if_ipending
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*/
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#define IFI_RECV 1 /* I want to receive */
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#define IFI_XMIT 2 /* I want to transmit */
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/*
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* Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
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* input routines have queues of messages stored on ifqueue structures
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* (defined above). Entries are added to and deleted from these structures
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* by these macros, which should be called with ipl raised to splimp().
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*/
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#define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
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#define IF_DROP(ifq) ((ifq)->ifq_drops++)
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#define IF_ENQUEUE(ifq, m) { \
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(m)->m_nextpkt = 0; \
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if ((ifq)->ifq_tail == 0) \
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(ifq)->ifq_head = m; \
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else \
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(ifq)->ifq_tail->m_nextpkt = m; \
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(ifq)->ifq_tail = m; \
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(ifq)->ifq_len++; \
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}
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#define IF_PREPEND(ifq, m) { \
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(m)->m_nextpkt = (ifq)->ifq_head; \
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if ((ifq)->ifq_tail == 0) \
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(ifq)->ifq_tail = (m); \
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(ifq)->ifq_head = (m); \
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(ifq)->ifq_len++; \
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}
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#define IF_DEQUEUE(ifq, m) { \
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(m) = (ifq)->ifq_head; \
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if (m) { \
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if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
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(ifq)->ifq_tail = 0; \
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(m)->m_nextpkt = 0; \
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(ifq)->ifq_len--; \
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} \
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}
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#define IFQ_MAXLEN 50
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#define IFNET_SLOWHZ 1 /* granularity is 1 second */
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/*
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* The ifaddr structure contains information about one address
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* of an interface. They are maintained by the different address families,
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* are allocated and attached when an address is set, and are linked
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* together so all addresses for an interface can be located.
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*/
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struct ifaddr {
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struct sockaddr *ifa_addr; /* address of interface */
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struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
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#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
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struct sockaddr *ifa_netmask; /* used to determine subnet */
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struct ifnet *ifa_ifp; /* back-pointer to interface */
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struct ifaddr *ifa_next; /* next address for interface */
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void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
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__P((int, struct rtentry *, struct sockaddr *));
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u_short ifa_flags; /* mostly rt_flags for cloning */
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short ifa_refcnt; /* extra to malloc for link info */
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int ifa_metric; /* cost of going out this interface */
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#ifdef notdef
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struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */
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#endif
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};
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#define IFA_ROUTE RTF_UP /* route installed */
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/*
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* Message format for use in obtaining information about interfaces
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* from getkerninfo and the routing socket
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*/
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struct if_msghdr {
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u_short ifm_msglen; /* to skip over non-understood messages */
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u_char ifm_version; /* future binary compatability */
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u_char ifm_type; /* message type */
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int ifm_addrs; /* like rtm_addrs */
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int ifm_flags; /* value of if_flags */
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u_short ifm_index; /* index for associated ifp */
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struct if_data ifm_data;/* statistics and other data about if */
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};
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/*
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* Message format for use in obtaining information about interface addresses
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* from getkerninfo and the routing socket
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*/
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struct ifa_msghdr {
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u_short ifam_msglen; /* to skip over non-understood messages */
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u_char ifam_version; /* future binary compatability */
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u_char ifam_type; /* message type */
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int ifam_addrs; /* like rtm_addrs */
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int ifam_flags; /* value of ifa_flags */
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u_short ifam_index; /* index for associated ifp */
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int ifam_metric; /* value of ifa_metric */
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};
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/*
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* Interface request structure used for socket
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* ioctl's. All interface ioctl's must have parameter
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* definitions which begin with ifr_name. The
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* remainder may be interface specific.
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*/
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struct ifreq {
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#define IFNAMSIZ 16
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char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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union {
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struct sockaddr ifru_addr;
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struct sockaddr ifru_dstaddr;
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struct sockaddr ifru_broadaddr;
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short ifru_flags;
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int ifru_metric;
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int ifru_mtu;
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int ifru_phys;
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caddr_t ifru_data;
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} ifr_ifru;
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#define ifr_addr ifr_ifru.ifru_addr /* address */
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#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */
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#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
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#define ifr_flags ifr_ifru.ifru_flags /* flags */
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#define ifr_metric ifr_ifru.ifru_metric /* metric */
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#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
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#define ifr_phys ifr_ifru.ifru_phys /* physical wire */
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#define ifr_data ifr_ifru.ifru_data /* for use by interface */
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};
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struct ifaliasreq {
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char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct sockaddr ifra_addr;
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struct sockaddr ifra_broadaddr;
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struct sockaddr ifra_mask;
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};
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/*
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* Structure used in SIOCGIFCONF request.
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* Used to retrieve interface configuration
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* for machine (useful for programs which
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* must know all networks accessible).
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*/
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struct ifconf {
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int ifc_len; /* size of associated buffer */
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union {
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caddr_t ifcu_buf;
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struct ifreq *ifcu_req;
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} ifc_ifcu;
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#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
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#define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
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};
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#include <net/if_arp.h>
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#ifdef KERNEL
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#define IFAFREE(ifa) \
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if ((ifa)->ifa_refcnt <= 0) \
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ifafree(ifa); \
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else \
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(ifa)->ifa_refcnt--;
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extern struct ifnet *ifnet;
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extern int ifqmaxlen;
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extern struct ifnet loif[];
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void ether_ifattach __P((struct ifnet *));
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void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
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int ether_output __P((struct ifnet *,
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struct mbuf *, struct sockaddr *, struct rtentry *));
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void if_attach __P((struct ifnet *));
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void if_down __P((struct ifnet *));
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void if_up __P((struct ifnet *));
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#ifdef vax
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void ifubareset __P((int));
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#endif
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/*void ifinit __P((void));*/ /* declared in systm.h for main() */
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int ifioctl __P((struct socket *, int, caddr_t, struct proc *));
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int ifpromisc __P((struct ifnet *, int));
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struct ifnet *ifunit __P((char *));
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struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
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struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
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struct ifaddr *ifa_ifwithnet __P((struct sockaddr *));
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struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
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struct sockaddr *));
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struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
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void ifafree __P((struct ifaddr *));
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int looutput __P((struct ifnet *,
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struct mbuf *, struct sockaddr *, struct rtentry *));
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#endif /* KERNEL */
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#endif /* !_NET_IF_H_ */
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