home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Workbench Add-On
/
Workbench Add-On - Volume 1.iso
/
BBS-Archive
/
Comm
/
AmiTCP30b2.lha
/
netinclude
/
net
/
if.h
< prev
next >
Wrap
C/C++ Source or Header
|
1994-02-04
|
10KB
|
281 lines
#ifndef NET_IF_H
#define NET_IF_H
#define IF_H /* XXX */
/*
** $Filename: net/if.h $
** $Release$
** $Revision: 3.1 $
** $Date: 1994/02/03 11:56:05 $
**
** Network interface
**
** Copyright © 1993,1994 AmiTCP/IP Group, <AmiTCP-Group@hut.fi>
** Helsinki University of Technology, Finland.
** All rights reserved.
*/
/*
* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if.h 7.11 (Berkeley) 3/19/91
*/
/*
* Structures defining a network interface, providing a packet
* transport mechanism (ala level 0 of the PUP protocols).
*
* Each interface accepts output datagrams of a specified maximum
* length, and provides higher level routines with input datagrams
* received from its medium.
*
* Output occurs when the routine if_output is called, with three parameters:
* (*ifp->if_output)(ifp, m, dst)
* Here m is the mbuf chain to be sent and dst is the destination address.
* The output routine encapsulates the supplied datagram if necessary,
* and then transmits it on its medium.
*
* On input, each interface unwraps the data received by it, and either
* places it on the input queue of a internetwork datagram routine
* and posts the associated software interrupt, or passes the datagram to a raw
* packet input routine.
*
* Routines exist for locating interfaces by their addresses
* or for locating a interface on a certain network, as well as more general
* routing and gateway routines maintaining information used to locate
* interfaces. These routines live in the files if.c and route.c
*/
#ifdef KERNEL /* XXX: ifnet going away soon */
#ifndef _TIME_ /* XXX fast fix for SNMP, going away soon */
#include <sys/time.h>
#endif
/*
* Structure defining a queue for a network interface.
*
* (Would like to call this struct ``if'', but C isn't PL/1.)
*/
struct ifqueue {
struct mbuf *ifq_head;
struct mbuf *ifq_tail;
int ifq_len;
int ifq_maxlen;
int ifq_drops;
};
struct ifnet {
char *if_name; /* name, e.g. ``en'' or ``lo'' */
short if_unit; /* sub-unit for lower level driver */
short if_mtu; /* maximum transmission unit */
short if_flags; /* up/down, broadcast, etc. */
short if_timer; /* time 'til if_watchdog called */
int if_metric; /* routing metric (external only) */
struct ifaddr *if_addrlist; /* linked list of addresses per if */
struct ifqueue if_snd; /* output queue */
/* procedure handles */
int (*if_init)(); /* init routine */
int (*if_output)(struct ifnet *, /* output routine (enqueue) */
struct mbuf *,
struct sockaddr *, struct rtentry *);
int (*if_start)(); /* initiate output routine */
int (*if_done)(); /* output complete routine */
int (*if_ioctl)(struct ifnet *, int, caddr_t); /* ioctl routine */
int (*if_reset)(); /* bus reset routine */
int (*if_watchdog)(); /* timer routine */
/* generic interface statistics */
int if_ipackets; /* packets received on interface */
int if_ierrors; /* input errors on interface */
int if_opackets; /* packets sent on interface */
int if_oerrors; /* output errors on interface */
int if_collisions; /* collisions on csma interfaces */
/* end statistics */
struct ifnet *if_next;
u_char if_type; /* ethernet, tokenring, etc */
u_char if_addrlen; /* media address length */
u_char if_hdrlen; /* media header length */
u_char if_index; /* numeric abbreviation for this if */
/* more statistics here to avoid recompiling netstat */
struct timeval if_lastchange; /* last updated */
int if_ibytes; /* total number of octets received */
int if_obytes; /* total number of octets sent */
int if_imcasts; /* packets received via multicast */
int if_omcasts; /* packets sent via multicast */
int if_iqdrops; /* dropped on input, this interface */
int if_noproto; /* destined for unsupported protocol */
int if_baudrate; /* linespeed */
int if_pcount; /* number of promiscuous listeners */
};
/*
* Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
* input routines have queues of messages stored on ifqueue structures
* (defined above). Entries are added to and deleted from these structures
* by these macros, which should be called with ipl raised to splimp().
*/
#define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
#define IF_DROP(ifq) ((ifq)->ifq_drops++)
#define IF_ENQUEUE(ifq, m) { \
(m)->m_nextpkt = 0; \
if ((ifq)->ifq_tail == 0) \
(ifq)->ifq_head = m; \
else \
(ifq)->ifq_tail->m_nextpkt = m; \
(ifq)->ifq_tail = m; \
(ifq)->ifq_len++; \
}
#define IF_PREPEND(ifq, m) { \
(m)->m_nextpkt = (ifq)->ifq_head; \
if ((ifq)->ifq_tail == 0) \
(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 IFQ_MAXLEN 50
#define IFNET_SLOWHZ 1 /* granularity is 1 second */
#endif /* KERNEL */
#define IFF_UP 0x1 /* interface is up */
#define IFF_BROADCAST 0x2 /* broadcast address valid */
#define IFF_DEBUG 0x4 /* turn on debugging */
#define IFF_LOOPBACK 0x8 /* is a loopback net */
#define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */
#define IFF_NOTRAILERS 0x20 /* avoid use of trailers */
#define IFF_RUNNING 0x40 /* resources allocated */
#define IFF_NOARP 0x80 /* no address resolution protocol */
#define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
/* next two not supported now, but reserved: */
#define IFF_PROMISC 0x100 /* receive all packets */
#define IFF_ALLMULTI 0x200 /* receive all multicast packets */
#define IFF_OACTIVE 0x400 /* transmission in progress */
/* flags set internally only: */
#define IFF_CANTCHANGE \
(IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|IFF_SIMPLEX)
#ifdef KERNEL /* XXX: going away soon */
/*
* 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 */
struct ifaddr *ifa_next; /* next address for interface */
void (*ifa_rtrequest)(int, /* check or clean routes (+ or -)'d */
struct rtentry *, struct sockaddr *);
struct rtentry *ifa_rt; /* ??? for ROUTETOIF */
u_short ifa_flags; /* mostly rt_flags for cloning */
u_short ifa_llinfolen; /* extra to malloc for link info */
};
#define IFA_ROUTE RTF_UP /* route installed */
#endif /* KERNEL */
/*
* 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 IFNAMSIZ 16
char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
short ifru_flags;
int ifru_metric;
caddr_t ifru_data;
} ifr_ifru;
#define ifr_addr ifr_ifru.ifru_addr /* 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_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_broadaddr;
struct sockaddr ifra_mask;
};
/*
* 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 */
};
#ifndef IF_ARP_H
#include <net/if_arp.h>
#endif
#ifdef KERNEL
extern struct ifnet *ifnet;
extern struct ifqueue rawintrq; /* raw packet input queue */
#include <net/if_protos.h>
#include <net/if_loop_protos.h>
#endif /* KERNEL */
#endif /* IF_H */