665 lines
22 KiB
C
665 lines
22 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.
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#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 an 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 an 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 thread;
|
|
struct rtentry;
|
|
struct rt_addrinfo;
|
|
struct socket;
|
|
struct ether_header;
|
|
struct carp_if;
|
|
#endif
|
|
|
|
#include <sys/queue.h> /* get TAILQ macros */
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/mbuf.h>
|
|
#include <sys/eventhandler.h>
|
|
#endif /* _KERNEL */
|
|
#include <sys/lock.h> /* XXX */
|
|
#include <sys/mutex.h> /* XXX */
|
|
#include <sys/event.h> /* XXX */
|
|
#include <sys/_task.h>
|
|
|
|
#define IF_DUNIT_NONE -1
|
|
|
|
#include <altq/if_altq.h>
|
|
|
|
TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
|
|
TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
|
|
TAILQ_HEAD(ifprefixhead, ifprefix);
|
|
TAILQ_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;
|
|
struct mtx ifq_mtx;
|
|
};
|
|
|
|
/*
|
|
* Structure defining a network interface.
|
|
*
|
|
* (Would like to call this struct ``if'', but C isn't PL/1.)
|
|
*/
|
|
|
|
/*
|
|
* NB: For FreeBSD, it is assumed that each NIC driver's softc starts with
|
|
* one of these structures, typically held within an arpcom structure.
|
|
*
|
|
* struct <foo>_softc {
|
|
* struct arpcom {
|
|
* struct ifnet ac_if;
|
|
* ...
|
|
* } <arpcom> ;
|
|
* ...
|
|
* };
|
|
*
|
|
* The assumption is used in a number of places, including many
|
|
* files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach().
|
|
*
|
|
* Unfortunately devices' softc are opaque, so we depend on this layout
|
|
* to locate the struct ifnet from the softc in the generic code.
|
|
*
|
|
*/
|
|
struct ifnet {
|
|
void *if_softc; /* pointer to driver state */
|
|
TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
|
|
char if_xname[IFNAMSIZ]; /* external name (name + unit) */
|
|
const char *if_dname; /* driver name */
|
|
int if_dunit; /* unit or IF_DUNIT_NONE */
|
|
struct ifaddrhead if_addrhead; /* linked list of addresses per if */
|
|
/*
|
|
* if_addrhead is the list of all addresses associated to
|
|
* an interface.
|
|
* Some code in the kernel assumes that first element
|
|
* of the list has type AF_LINK, and contains sockaddr_dl
|
|
* addresses which store the link-level address and the name
|
|
* of the interface.
|
|
* However, access to the AF_LINK address through this
|
|
* field is deprecated. Use ifaddr_byindex() instead.
|
|
*/
|
|
struct knlist if_klist; /* events attached to this if */
|
|
int if_pcount; /* number of promiscuous listeners */
|
|
struct carp_if *if_carp; /* carp interface structure */
|
|
struct bpf_if *if_bpf; /* packet filter structure */
|
|
u_short if_index; /* numeric abbreviation for this if */
|
|
short if_timer; /* time 'til if_watchdog called */
|
|
u_short if_nvlans; /* number of active vlans */
|
|
int if_flags; /* up/down, broadcast, etc. */
|
|
int if_capabilities; /* interface capabilities */
|
|
int if_capenable; /* enabled features */
|
|
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) */
|
|
(struct ifnet *, struct mbuf *, struct sockaddr *,
|
|
struct rtentry *);
|
|
void (*if_input) /* input routine (from h/w driver) */
|
|
(struct ifnet *, struct mbuf *);
|
|
void (*if_start) /* initiate output routine */
|
|
(struct ifnet *);
|
|
int (*if_ioctl) /* ioctl routine */
|
|
(struct ifnet *, u_long, caddr_t);
|
|
void (*if_watchdog) /* timer routine */
|
|
(struct ifnet *);
|
|
void (*if_init) /* Init routine */
|
|
(void *);
|
|
int (*if_resolvemulti) /* validate/resolve multicast */
|
|
(struct ifnet *, struct sockaddr **, struct sockaddr *);
|
|
void *if_spare1; /* spare pointer 1 */
|
|
void *if_spare2; /* spare pointer 2 */
|
|
void *if_spare3; /* spare pointer 3 */
|
|
u_int if_spare_flags1; /* spare flags 1 */
|
|
u_int if_spare_flags2; /* spare flags 2 */
|
|
struct ifaltq if_snd; /* output queue (includes altq) */
|
|
const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
|
|
|
|
struct lltable *lltables; /* list of L3-L2 resolution tables */
|
|
|
|
struct label *if_label; /* interface MAC label */
|
|
|
|
/* these are only used by IPv6 */
|
|
struct ifprefixhead if_prefixhead; /* list of prefixes per if */
|
|
void *if_afdata[AF_MAX];
|
|
int if_afdata_initialized;
|
|
struct mtx if_afdata_mtx;
|
|
struct task if_starttask; /* task for IFF_NEEDSGIANT */
|
|
};
|
|
|
|
typedef void if_init_f_t(void *);
|
|
|
|
/*
|
|
* XXX These aliases are terribly dangerous because they could apply
|
|
* to anything.
|
|
*/
|
|
#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_link_state if_data.ifi_link_state
|
|
#define if_baudrate if_data.ifi_baudrate
|
|
#define if_hwassist if_data.ifi_hwassist
|
|
#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 *)NULL)
|
|
|
|
/* for compatibility with other BSDs */
|
|
#define if_addrlist if_addrhead
|
|
#define if_list if_link
|
|
|
|
/*
|
|
* 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_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
|
|
#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
|
|
#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
|
|
#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
|
|
#define _IF_DROP(ifq) ((ifq)->ifq_drops++)
|
|
#define _IF_QLEN(ifq) ((ifq)->ifq_len)
|
|
|
|
#define _IF_ENQUEUE(ifq, m) do { \
|
|
(m)->m_nextpkt = NULL; \
|
|
if ((ifq)->ifq_tail == NULL) \
|
|
(ifq)->ifq_head = m; \
|
|
else \
|
|
(ifq)->ifq_tail->m_nextpkt = m; \
|
|
(ifq)->ifq_tail = m; \
|
|
(ifq)->ifq_len++; \
|
|
} while (0)
|
|
|
|
#define IF_ENQUEUE(ifq, m) do { \
|
|
IF_LOCK(ifq); \
|
|
_IF_ENQUEUE(ifq, m); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define _IF_PREPEND(ifq, m) do { \
|
|
(m)->m_nextpkt = (ifq)->ifq_head; \
|
|
if ((ifq)->ifq_tail == NULL) \
|
|
(ifq)->ifq_tail = (m); \
|
|
(ifq)->ifq_head = (m); \
|
|
(ifq)->ifq_len++; \
|
|
} while (0)
|
|
|
|
#define IF_PREPEND(ifq, m) do { \
|
|
IF_LOCK(ifq); \
|
|
_IF_PREPEND(ifq, m); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define _IF_DEQUEUE(ifq, m) do { \
|
|
(m) = (ifq)->ifq_head; \
|
|
if (m) { \
|
|
if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
|
|
(ifq)->ifq_tail = NULL; \
|
|
(m)->m_nextpkt = NULL; \
|
|
(ifq)->ifq_len--; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define IF_DEQUEUE(ifq, m) do { \
|
|
IF_LOCK(ifq); \
|
|
_IF_DEQUEUE(ifq, m); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
|
|
#define IF_POLL(ifq, m) _IF_POLL(ifq, m)
|
|
|
|
#define _IF_DRAIN(ifq) do { \
|
|
struct mbuf *m; \
|
|
for (;;) { \
|
|
_IF_DEQUEUE(ifq, m); \
|
|
if (m == NULL) \
|
|
break; \
|
|
m_freem(m); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define IF_DRAIN(ifq) do { \
|
|
IF_LOCK(ifq); \
|
|
_IF_DRAIN(ifq); \
|
|
IF_UNLOCK(ifq); \
|
|
} while(0)
|
|
|
|
#ifdef _KERNEL
|
|
/* interface address change event */
|
|
typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
|
|
EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
|
|
/* new interface arrival event */
|
|
typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
|
|
EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
|
|
/* interface departure event */
|
|
typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
|
|
EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
|
|
|
|
#define IF_AFDATA_LOCK_INIT(ifp) \
|
|
mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF)
|
|
#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx)
|
|
#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx)
|
|
#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx)
|
|
#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx)
|
|
|
|
#define IFF_LOCKGIANT(ifp) do { \
|
|
if ((ifp)->if_flags & IFF_NEEDSGIANT) \
|
|
mtx_lock(&Giant); \
|
|
} while (0)
|
|
|
|
#define IFF_UNLOCKGIANT(ifp) do { \
|
|
if ((ifp)->if_flags & IFF_NEEDSGIANT) \
|
|
mtx_unlock(&Giant); \
|
|
} while (0)
|
|
|
|
int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
|
|
int adjust);
|
|
#define IF_HANDOFF(ifq, m, ifp) \
|
|
if_handoff((struct ifqueue *)ifq, m, ifp, 0)
|
|
#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \
|
|
if_handoff((struct ifqueue *)ifq, m, ifp, adj)
|
|
|
|
void if_start(struct ifnet *);
|
|
|
|
#define IFQ_ENQUEUE(ifq, m, err) \
|
|
do { \
|
|
IF_LOCK(ifq); \
|
|
if (ALTQ_IS_ENABLED(ifq)) \
|
|
ALTQ_ENQUEUE(ifq, m, NULL, err); \
|
|
else { \
|
|
if (_IF_QFULL(ifq)) { \
|
|
m_freem(m); \
|
|
(err) = ENOBUFS; \
|
|
} else { \
|
|
_IF_ENQUEUE(ifq, m); \
|
|
(err) = 0; \
|
|
} \
|
|
} \
|
|
if (err) \
|
|
(ifq)->ifq_drops++; \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_DEQUEUE_NOLOCK(ifq, m) \
|
|
do { \
|
|
if (TBR_IS_ENABLED(ifq)) \
|
|
(m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \
|
|
else if (ALTQ_IS_ENABLED(ifq)) \
|
|
ALTQ_DEQUEUE(ifq, m); \
|
|
else \
|
|
_IF_DEQUEUE(ifq, m); \
|
|
} while (0)
|
|
|
|
#define IFQ_DEQUEUE(ifq, m) \
|
|
do { \
|
|
IF_LOCK(ifq); \
|
|
IFQ_DEQUEUE_NOLOCK(ifq, m); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_POLL_NOLOCK(ifq, m) \
|
|
do { \
|
|
if (TBR_IS_ENABLED(ifq)) \
|
|
(m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \
|
|
else if (ALTQ_IS_ENABLED(ifq)) \
|
|
ALTQ_POLL(ifq, m); \
|
|
else \
|
|
_IF_POLL(ifq, m); \
|
|
} while (0)
|
|
|
|
#define IFQ_POLL(ifq, m) \
|
|
do { \
|
|
IF_LOCK(ifq); \
|
|
IFQ_POLL_NOLOCK(ifq, m); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_PURGE_NOLOCK(ifq) \
|
|
do { \
|
|
if (ALTQ_IS_ENABLED(ifq)) { \
|
|
ALTQ_PURGE(ifq); \
|
|
} else \
|
|
_IF_DRAIN(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_PURGE(ifq) \
|
|
do { \
|
|
IF_LOCK(ifq); \
|
|
IFQ_PURGE_NOLOCK(ifq); \
|
|
IF_UNLOCK(ifq); \
|
|
} while (0)
|
|
|
|
#define IFQ_SET_READY(ifq) \
|
|
do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
|
|
|
|
#define IFQ_LOCK(ifq) IF_LOCK(ifq)
|
|
#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq)
|
|
#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq)
|
|
#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
|
|
#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++)
|
|
#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len)
|
|
#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++)
|
|
#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len))
|
|
|
|
#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \
|
|
do { \
|
|
int len; \
|
|
short mflags; \
|
|
\
|
|
len = (m)->m_pkthdr.len; \
|
|
mflags = (m)->m_flags; \
|
|
IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \
|
|
if ((err) == 0) { \
|
|
(ifp)->if_obytes += len + (adj); \
|
|
if (mflags & M_MCAST) \
|
|
(ifp)->if_omcasts++; \
|
|
if (((ifp)->if_flags & IFF_OACTIVE) == 0) \
|
|
if_start(ifp); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define IFQ_HANDOFF(ifp, m, err) \
|
|
IFQ_HANDOFF_ADJ(ifp, m, 0, err)
|
|
|
|
#define IFQ_DRV_DEQUEUE(ifq, m) \
|
|
do { \
|
|
(m) = (ifq)->ifq_drv_head; \
|
|
if (m) { \
|
|
if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \
|
|
(ifq)->ifq_drv_tail = NULL; \
|
|
(m)->m_nextpkt = NULL; \
|
|
(ifq)->ifq_drv_len--; \
|
|
} else { \
|
|
IFQ_LOCK(ifq); \
|
|
IFQ_DEQUEUE_NOLOCK(ifq, m); \
|
|
while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \
|
|
struct mbuf *m0; \
|
|
IFQ_DEQUEUE_NOLOCK(ifq, m0); \
|
|
if (m0 == NULL) \
|
|
break; \
|
|
m0->m_nextpkt = NULL; \
|
|
if ((ifq)->ifq_drv_tail == NULL) \
|
|
(ifq)->ifq_drv_head = m0; \
|
|
else \
|
|
(ifq)->ifq_drv_tail->m_nextpkt = m0; \
|
|
(ifq)->ifq_drv_tail = m0; \
|
|
(ifq)->ifq_drv_len++; \
|
|
} \
|
|
IFQ_UNLOCK(ifq); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define IFQ_DRV_PREPEND(ifq, m) \
|
|
do { \
|
|
(m)->m_nextpkt = (ifq)->ifq_drv_head; \
|
|
if ((ifq)->ifq_drv_tail == NULL) \
|
|
(ifq)->ifq_drv_tail = (m); \
|
|
(ifq)->ifq_drv_head = (m); \
|
|
(ifq)->ifq_drv_len++; \
|
|
} while (0)
|
|
|
|
#define IFQ_DRV_IS_EMPTY(ifq) \
|
|
(((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
|
|
|
|
#define IFQ_DRV_PURGE(ifq) \
|
|
do { \
|
|
struct mbuf *m, *n = (ifq)->ifq_drv_head; \
|
|
while((m = n) != NULL) { \
|
|
n = m->m_nextpkt; \
|
|
m_freem(m); \
|
|
} \
|
|
(ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \
|
|
(ifq)->ifq_drv_len = 0; \
|
|
IFQ_PURGE(ifq); \
|
|
} while (0)
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* NOTE: a 'struct ifaddr' is always at the beginning of a larger
|
|
* chunk of malloc'ed memory, where we store the three addresses
|
|
* (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
|
|
*/
|
|
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 if_data if_data; /* not all members are meaningful */
|
|
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 */
|
|
(int, struct rtentry *, struct rt_addrinfo *);
|
|
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 */
|
|
int (*ifa_claim_addr) /* check if an addr goes to this if */
|
|
(struct ifaddr *, struct sockaddr *);
|
|
struct mtx ifa_mtx;
|
|
};
|
|
#define IFA_ROUTE RTF_UP /* route installed */
|
|
|
|
/* for compatibility with other BSDs */
|
|
#define ifa_list ifa_link
|
|
|
|
#define IFA_LOCK_INIT(ifa) \
|
|
mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF)
|
|
#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx)
|
|
#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx)
|
|
#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx)
|
|
|
|
/*
|
|
* The prefix structure contains information about one prefix
|
|
* of an interface. They are maintained by the different address families,
|
|
* are allocated and attached when a prefix or an address is set,
|
|
* and are linked together so all prefixes for an interface can be located.
|
|
*/
|
|
struct ifprefix {
|
|
struct sockaddr *ifpr_prefix; /* prefix of interface */
|
|
struct ifnet *ifpr_ifp; /* back-pointer to interface */
|
|
TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */
|
|
u_char ifpr_plen; /* prefix length in bits */
|
|
u_char ifpr_type; /* protocol dependent prefix type */
|
|
};
|
|
|
|
/*
|
|
* 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 {
|
|
TAILQ_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 { \
|
|
IFA_LOCK(ifa); \
|
|
KASSERT((ifa)->ifa_refcnt > 0, \
|
|
("ifa %p !(ifa_refcnt > 0)", ifa)); \
|
|
if (--(ifa)->ifa_refcnt == 0) { \
|
|
IFA_DESTROY(ifa); \
|
|
free(ifa, M_IFADDR); \
|
|
} else \
|
|
IFA_UNLOCK(ifa); \
|
|
} while (0)
|
|
|
|
#define IFAREF(ifa) \
|
|
do { \
|
|
IFA_LOCK(ifa); \
|
|
++(ifa)->ifa_refcnt; \
|
|
IFA_UNLOCK(ifa); \
|
|
} while (0)
|
|
|
|
extern struct mtx ifnet_lock;
|
|
#define IFNET_LOCK_INIT() \
|
|
mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE)
|
|
#define IFNET_WLOCK() mtx_lock(&ifnet_lock)
|
|
#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock)
|
|
#define IFNET_RLOCK() IFNET_WLOCK()
|
|
#define IFNET_RUNLOCK() IFNET_WUNLOCK()
|
|
|
|
struct ifindex_entry {
|
|
struct ifnet *ife_ifnet;
|
|
struct ifaddr *ife_ifnet_addr;
|
|
struct cdev *ife_dev;
|
|
};
|
|
|
|
#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet
|
|
/*
|
|
* Given the index, ifaddr_byindex() returns the one and only
|
|
* link-level ifaddr for the interface. You are not supposed to use
|
|
* it to traverse the list of addresses associated to the interface.
|
|
*/
|
|
#define ifaddr_byindex(idx) ifindex_table[(idx)].ife_ifnet_addr
|
|
#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev
|
|
|
|
extern struct ifnethead ifnet;
|
|
extern struct ifindex_entry *ifindex_table;
|
|
extern int ifqmaxlen;
|
|
extern struct ifnet *loif; /* first loopback interface */
|
|
extern int if_index;
|
|
|
|
int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
|
|
int if_allmulti(struct ifnet *, int);
|
|
void if_attach(struct ifnet *);
|
|
int if_delmulti(struct ifnet *, struct sockaddr *);
|
|
void if_detach(struct ifnet *);
|
|
void if_down(struct ifnet *);
|
|
void if_initname(struct ifnet *, const char *, int);
|
|
void if_link_state_change(struct ifnet *, int);
|
|
int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
|
|
int if_setlladdr(struct ifnet *, const u_char *, int);
|
|
void if_up(struct ifnet *);
|
|
/*void ifinit(void);*/ /* declared in systm.h for main() */
|
|
int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
|
|
int ifpromisc(struct ifnet *, int);
|
|
struct ifnet *ifunit(const char *);
|
|
|
|
struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithnet(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
|
|
struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
|
|
|
|
struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *);
|
|
int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
|
|
|
|
#define IF_LLADDR(ifp) \
|
|
LLADDR((struct sockaddr_dl *) ifaddr_byindex((ifp)->if_index)->ifa_addr)
|
|
|
|
#ifdef DEVICE_POLLING
|
|
enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER };
|
|
|
|
typedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
|
|
int ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
|
|
int ether_poll_deregister(struct ifnet *ifp);
|
|
#endif /* DEVICE_POLLING */
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_NET_IF_VAR_H_ */
|