aab3beeede
out-of-range values. ``comparison is always 0'' warnings are silly ! Ok'd by: wollman, dg Advised by: bde
346 lines
12 KiB
C
346 lines
12 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The 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.
|
|
*
|
|
* From: @(#)if.h 8.1 (Berkeley) 6/10/93
|
|
* $Id: if_var.h,v 1.13 1999/05/16 17:09:20 pb Exp $
|
|
*/
|
|
|
|
#ifndef _NET_IF_VAR_H_
|
|
#define _NET_IF_VAR_H_
|
|
|
|
/*
|
|
* 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, rt)
|
|
* 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 __STDC__
|
|
/*
|
|
* Forward structure declarations for function prototypes [sic].
|
|
*/
|
|
struct mbuf;
|
|
struct proc;
|
|
struct rtentry;
|
|
struct socket;
|
|
struct ether_header;
|
|
#endif
|
|
|
|
#include <sys/queue.h> /* get TAILQ macros */
|
|
|
|
TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
|
|
TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
|
|
LIST_HEAD(ifmultihead, ifmultiaddr);
|
|
|
|
/*
|
|
* Structure defining a queue for a network interface.
|
|
*/
|
|
struct ifqueue {
|
|
struct mbuf *ifq_head;
|
|
struct mbuf *ifq_tail;
|
|
int ifq_len;
|
|
int ifq_maxlen;
|
|
int ifq_drops;
|
|
};
|
|
|
|
/*
|
|
* Structure defining a network interface.
|
|
*
|
|
* (Would like to call this struct ``if'', but C isn't PL/1.)
|
|
*/
|
|
struct ifnet {
|
|
void *if_softc; /* pointer to driver state */
|
|
char *if_name; /* name, e.g. ``en'' or ``lo'' */
|
|
TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
|
|
struct ifaddrhead if_addrhead; /* linked list of addresses per if */
|
|
int if_pcount; /* number of promiscuous listeners */
|
|
struct bpf_if *if_bpf; /* packet filter structure */
|
|
u_short if_index; /* numeric abbreviation for this if */
|
|
short if_unit; /* sub-unit for lower level driver */
|
|
short if_timer; /* time 'til if_watchdog called */
|
|
short if_flags; /* up/down, broadcast, etc. */
|
|
int if_ipending; /* interrupts pending */
|
|
void *if_linkmib; /* link-type-specific MIB data */
|
|
size_t if_linkmiblen; /* length of above data */
|
|
struct if_data if_data;
|
|
struct ifmultihead if_multiaddrs; /* multicast addresses configured */
|
|
int if_amcount; /* number of all-multicast requests */
|
|
/* procedure handles */
|
|
int (*if_output) /* output routine (enqueue) */
|
|
__P((struct ifnet *, struct mbuf *, struct sockaddr *,
|
|
struct rtentry *));
|
|
void (*if_start) /* initiate output routine */
|
|
__P((struct ifnet *));
|
|
int (*if_done) /* output complete routine */
|
|
__P((struct ifnet *)); /* (XXX not used; fake prototype) */
|
|
int (*if_ioctl) /* ioctl routine */
|
|
__P((struct ifnet *, u_long, caddr_t));
|
|
void (*if_watchdog) /* timer routine */
|
|
__P((struct ifnet *));
|
|
int (*if_poll_recv) /* polled receive routine */
|
|
__P((struct ifnet *, int *));
|
|
int (*if_poll_xmit) /* polled transmit routine */
|
|
__P((struct ifnet *, int *));
|
|
void (*if_poll_intren) /* polled interrupt reenable routine */
|
|
__P((struct ifnet *));
|
|
void (*if_poll_slowinput) /* input routine for slow devices */
|
|
__P((struct ifnet *, struct mbuf *));
|
|
void (*if_init) /* Init routine */
|
|
__P((void *));
|
|
int (*if_resolvemulti) /* validate/resolve multicast */
|
|
__P((struct ifnet *, struct sockaddr **, struct sockaddr *));
|
|
struct ifqueue if_snd; /* output queue */
|
|
struct ifqueue *if_poll_slowq; /* input queue for slow devices */
|
|
};
|
|
typedef void if_init_f_t __P((void *));
|
|
|
|
#define if_mtu if_data.ifi_mtu
|
|
#define if_type if_data.ifi_type
|
|
#define if_physical if_data.ifi_physical
|
|
#define if_addrlen if_data.ifi_addrlen
|
|
#define if_hdrlen if_data.ifi_hdrlen
|
|
#define if_metric if_data.ifi_metric
|
|
#define if_baudrate if_data.ifi_baudrate
|
|
#define if_ipackets if_data.ifi_ipackets
|
|
#define if_ierrors if_data.ifi_ierrors
|
|
#define if_opackets if_data.ifi_opackets
|
|
#define if_oerrors if_data.ifi_oerrors
|
|
#define if_collisions if_data.ifi_collisions
|
|
#define if_ibytes if_data.ifi_ibytes
|
|
#define if_obytes if_data.ifi_obytes
|
|
#define if_imcasts if_data.ifi_imcasts
|
|
#define if_omcasts if_data.ifi_omcasts
|
|
#define if_iqdrops if_data.ifi_iqdrops
|
|
#define if_noproto if_data.ifi_noproto
|
|
#define if_lastchange if_data.ifi_lastchange
|
|
#define if_recvquota if_data.ifi_recvquota
|
|
#define if_xmitquota if_data.ifi_xmitquota
|
|
#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0)
|
|
|
|
/*
|
|
* Bit values in if_ipending
|
|
*/
|
|
#define IFI_RECV 1 /* I want to receive */
|
|
#define IFI_XMIT 2 /* I want to transmit */
|
|
|
|
/*
|
|
* Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
|
|
* are 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--; \
|
|
} \
|
|
}
|
|
|
|
#ifdef KERNEL
|
|
#define IF_ENQ_DROP(ifq, m) if_enq_drop(ifq, m)
|
|
|
|
#if defined(__GNUC__) && defined(MT_HEADER)
|
|
static __inline int
|
|
if_queue_drop(struct ifqueue *ifq, struct mbuf *m)
|
|
{
|
|
IF_DROP(ifq);
|
|
return 0;
|
|
}
|
|
|
|
static __inline int
|
|
if_enq_drop(struct ifqueue *ifq, struct mbuf *m)
|
|
{
|
|
if (IF_QFULL(ifq) &&
|
|
!if_queue_drop(ifq, m))
|
|
return 0;
|
|
IF_ENQUEUE(ifq, m);
|
|
return 1;
|
|
}
|
|
#else
|
|
|
|
#ifdef MT_HEADER
|
|
int if_enq_drop __P((struct ifqueue *, struct mbuf *));
|
|
#endif
|
|
|
|
#endif
|
|
|
|
/*
|
|
* 72 was chosen below because it is the size of a TCP/IP
|
|
* header (40) + the minimum mss (32).
|
|
*/
|
|
#define IF_MINMTU 72
|
|
#define IF_MAXMTU 65535
|
|
|
|
#endif /* KERNEL */
|
|
|
|
/*
|
|
* 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_link; /* queue macro glue */
|
|
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; /* references to this structure */
|
|
int ifa_metric; /* cost of going out this interface */
|
|
#ifdef notdef
|
|
struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */
|
|
#endif
|
|
int (*ifa_claim_addr) /* check if an addr goes to this if */
|
|
__P((struct ifaddr *, struct sockaddr *));
|
|
|
|
};
|
|
#define IFA_ROUTE RTF_UP /* route installed */
|
|
|
|
/*
|
|
* Multicast address structure. This is analogous to the ifaddr
|
|
* structure except that it keeps track of multicast addresses.
|
|
* Also, the reference count here is a count of requests for this
|
|
* address, not a count of pointers to this structure.
|
|
*/
|
|
struct ifmultiaddr {
|
|
LIST_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
|
|
struct sockaddr *ifma_addr; /* address this membership is for */
|
|
struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
|
|
struct ifnet *ifma_ifp; /* back-pointer to interface */
|
|
u_int ifma_refcount; /* reference count */
|
|
void *ifma_protospec; /* protocol-specific state, if any */
|
|
};
|
|
|
|
#ifdef KERNEL
|
|
#define IFAFREE(ifa) \
|
|
do { \
|
|
if ((ifa)->ifa_refcnt <= 0) \
|
|
ifafree(ifa); \
|
|
else \
|
|
(ifa)->ifa_refcnt--; \
|
|
} while (0)
|
|
|
|
extern struct ifnethead ifnet;
|
|
extern int ifqmaxlen;
|
|
extern struct ifnet loif[];
|
|
extern int if_index;
|
|
extern struct ifaddr **ifnet_addrs;
|
|
|
|
void ether_ifattach __P((struct ifnet *));
|
|
void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
|
|
int ether_output __P((struct ifnet *,
|
|
struct mbuf *, struct sockaddr *, struct rtentry *));
|
|
int ether_ioctl __P((struct ifnet *, int, caddr_t));
|
|
|
|
int if_addmulti __P((struct ifnet *, struct sockaddr *,
|
|
struct ifmultiaddr **));
|
|
int if_allmulti __P((struct ifnet *, int));
|
|
void if_attach __P((struct ifnet *));
|
|
int if_delmulti __P((struct ifnet *, struct sockaddr *));
|
|
void if_detach __P((struct ifnet *));
|
|
void if_down __P((struct ifnet *));
|
|
void if_route __P((struct ifnet *, int flag, int fam));
|
|
void if_unroute __P((struct ifnet *, int flag, int fam));
|
|
void if_up __P((struct ifnet *));
|
|
/*void ifinit __P((void));*/ /* declared in systm.h for main() */
|
|
int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
|
|
int ifpromisc __P((struct ifnet *, int));
|
|
struct ifnet *ifunit __P((char *));
|
|
|
|
int if_poll_recv_slow __P((struct ifnet *ifp, int *quotap));
|
|
void if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap));
|
|
void if_poll_throttle __P((void));
|
|
void if_poll_unthrottle __P((void *));
|
|
void if_poll_init __P((void));
|
|
void if_poll __P((void));
|
|
|
|
struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
|
|
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 *));
|
|
|
|
struct ifmultiaddr *ifmaof_ifpforaddr __P((struct sockaddr *,
|
|
struct ifnet *));
|
|
int if_simloop __P((struct ifnet *ifp, struct mbuf *m,
|
|
struct sockaddr *dst, int hlen));
|
|
|
|
#endif /* KERNEL */
|
|
|
|
|
|
#endif /* !_NET_IF_VAR_H_ */
|