9a6356bc31
provide function ifa_switch_loopback_route() that will be used in case when an interface address used for a loopback route goes away, but we have another interface address with same address value and want to preserve loopback route. Sponsored by: Netflix Sponsored by: Nginx, Inc.
529 lines
20 KiB
C
529 lines
20 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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* 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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* From: @(#)if.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NET_IF_VAR_H_
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#define _NET_IF_VAR_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 an 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 an 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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struct rtentry; /* ifa_rtrequest */
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struct rt_addrinfo; /* ifa_rtrequest */
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struct socket;
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struct carp_if;
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struct carp_softc;
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struct ifvlantrunk;
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struct route; /* if_output */
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struct vnet;
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#ifdef _KERNEL
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#include <sys/mbuf.h> /* ifqueue only? */
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#include <sys/buf_ring.h>
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#include <net/vnet.h>
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#endif /* _KERNEL */
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#include <sys/counter.h>
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#include <sys/lock.h> /* XXX */
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#include <sys/mutex.h> /* struct ifqueue */
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#include <sys/rwlock.h> /* XXX */
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#include <sys/sx.h> /* XXX */
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#include <sys/_task.h> /* if_link_task */
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#define IF_DUNIT_NONE -1
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#include <altq/if_altq.h>
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TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
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TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
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TAILQ_HEAD(ifmultihead, ifmultiaddr);
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TAILQ_HEAD(ifgrouphead, ifg_group);
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#ifdef _KERNEL
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VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */
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#define V_link_pfil_hook VNET(link_pfil_hook)
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#endif /* _KERNEL */
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/*
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* Structure defining a network interface.
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*
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* Size ILP32: 592 (approx)
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* LP64: 1048 (approx)
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*/
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struct ifnet {
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/* General book keeping of interface lists. */
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TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
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LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
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TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
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/* protected by if_addr_lock */
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u_char if_alloctype; /* if_type at time of allocation */
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/* Driver and protocol specific information that remains stable. */
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void *if_softc; /* pointer to driver state */
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void *if_llsoftc; /* link layer softc */
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void *if_l2com; /* pointer to protocol bits */
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const char *if_dname; /* driver name */
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int if_dunit; /* unit or IF_DUNIT_NONE */
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u_short if_index; /* numeric abbreviation for this if */
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short if_index_reserved; /* spare space to grow if_index */
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char if_xname[IFNAMSIZ]; /* external name (name + unit) */
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char *if_description; /* interface description */
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/* Variable fields that are touched by the stack and drivers. */
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int if_flags; /* up/down, broadcast, etc. */
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int if_capabilities; /* interface features & capabilities */
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int if_capenable; /* enabled features & capabilities */
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void *if_linkmib; /* link-type-specific MIB data */
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size_t if_linkmiblen; /* length of above data */
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int if_drv_flags; /* driver-managed status flags */
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u_int if_refcount; /* reference count */
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struct ifaltq if_snd; /* output queue (includes altq) */
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struct if_data if_data; /* type information and statistics */
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struct task if_linktask; /* task for link change events */
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/* Addresses of different protocol families assigned to this if. */
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struct rwlock if_addr_lock; /* lock to protect address lists */
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/*
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* if_addrhead is the list of all addresses associated to
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* an interface.
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* Some code in the kernel assumes that first element
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* of the list has type AF_LINK, and contains sockaddr_dl
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* addresses which store the link-level address and the name
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* of the interface.
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* However, access to the AF_LINK address through this
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* field is deprecated. Use if_addr or ifaddr_byindex() instead.
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*/
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struct ifaddrhead if_addrhead; /* linked list of addresses per if */
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struct ifmultihead if_multiaddrs; /* multicast addresses configured */
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int if_amcount; /* number of all-multicast requests */
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struct ifaddr *if_addr; /* pointer to link-level address */
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const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
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struct rwlock if_afdata_lock;
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void *if_afdata[AF_MAX];
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int if_afdata_initialized;
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/* Additional features hung off the interface. */
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u_int if_fib; /* interface FIB */
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struct vnet *if_vnet; /* pointer to network stack instance */
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struct vnet *if_home_vnet; /* where this ifnet originates from */
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struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
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struct bpf_if *if_bpf; /* packet filter structure */
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int if_pcount; /* number of promiscuous listeners */
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void *if_bridge; /* bridge glue */
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void *if_lagg; /* lagg glue */
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void *if_pf_kif; /* pf glue */
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struct carp_if *if_carp; /* carp interface structure */
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struct label *if_label; /* interface MAC label */
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/* Various procedures of the layer2 encapsulation and drivers. */
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int (*if_output) /* output routine (enqueue) */
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(struct ifnet *, struct mbuf *, const struct sockaddr *,
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struct route *);
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void (*if_input) /* input routine (from h/w driver) */
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(struct ifnet *, struct mbuf *);
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void (*if_start) /* initiate output routine */
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(struct ifnet *);
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int (*if_ioctl) /* ioctl routine */
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(struct ifnet *, u_long, caddr_t);
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void (*if_init) /* Init routine */
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(void *);
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int (*if_resolvemulti) /* validate/resolve multicast */
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(struct ifnet *, struct sockaddr **, struct sockaddr *);
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void (*if_qflush) /* flush any queues */
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(struct ifnet *);
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int (*if_transmit) /* initiate output routine */
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(struct ifnet *, struct mbuf *);
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void (*if_reassign) /* reassign to vnet routine */
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(struct ifnet *, struct vnet *, char *);
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/* Stuff that's only temporary and doesn't belong here. */
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u_int if_hw_tsomax; /* tso burst length limit, the minimum
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* is (IP_MAXPACKET / 8).
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* XXXAO: Have to find a better place
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* for it eventually. */
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/*
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* Spare fields are added so that we can modify sensitive data
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* structures without changing the kernel binary interface, and must
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* be used with care where binary compatibility is required.
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*/
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char if_cspare[3];
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int if_ispare[4];
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void *if_unused[2];
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void *if_pspare[8]; /* 1 netmap, 7 TDB */
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};
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#include <net/ifq.h> /* XXXAO: temporary unconditional include */
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/*
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* XXX These aliases are terribly dangerous because they could apply
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* to anything.
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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_link_state if_data.ifi_link_state
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#define if_baudrate if_data.ifi_baudrate
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#define if_baudrate_pf if_data.ifi_baudrate_pf
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#define if_hwassist if_data.ifi_hwassist
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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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/* for compatibility with other BSDs */
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#define if_addrlist if_addrhead
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#define if_list if_link
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#define if_name(ifp) ((ifp)->if_xname)
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/*
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* Locks for address lists on the network interface.
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*/
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#define IF_ADDR_LOCK_INIT(if) rw_init(&(if)->if_addr_lock, "if_addr_lock")
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#define IF_ADDR_LOCK_DESTROY(if) rw_destroy(&(if)->if_addr_lock)
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#define IF_ADDR_WLOCK(if) rw_wlock(&(if)->if_addr_lock)
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#define IF_ADDR_WUNLOCK(if) rw_wunlock(&(if)->if_addr_lock)
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#define IF_ADDR_RLOCK(if) rw_rlock(&(if)->if_addr_lock)
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#define IF_ADDR_RUNLOCK(if) rw_runlock(&(if)->if_addr_lock)
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#define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED)
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#define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED)
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/*
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* Function variations on locking macros intended to be used by loadable
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* kernel modules in order to divorce them from the internals of address list
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* locking.
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*/
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void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */
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void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */
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void if_maddr_rlock(struct ifnet *ifp); /* if_multiaddrs */
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void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */
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#ifdef _KERNEL
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#ifdef _SYS_EVENTHANDLER_H_
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/* interface link layer address change event */
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typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
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/* interface address change event */
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typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
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/* new interface arrival event */
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typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
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/* interface departure event */
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typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
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EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
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/* Interface link state change event */
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typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
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EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
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#endif /* _SYS_EVENTHANDLER_H_ */
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/*
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* interface groups
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*/
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struct ifg_group {
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char ifg_group[IFNAMSIZ];
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u_int ifg_refcnt;
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void *ifg_pf_kif;
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TAILQ_HEAD(, ifg_member) ifg_members;
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TAILQ_ENTRY(ifg_group) ifg_next;
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};
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struct ifg_member {
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TAILQ_ENTRY(ifg_member) ifgm_next;
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struct ifnet *ifgm_ifp;
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};
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struct ifg_list {
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struct ifg_group *ifgl_group;
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TAILQ_ENTRY(ifg_list) ifgl_next;
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};
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#ifdef _SYS_EVENTHANDLER_H_
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/* group attach event */
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typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
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EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
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/* group detach event */
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typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
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EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
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/* group change event */
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typedef void (*group_change_event_handler_t)(void *, const char *);
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EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
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#endif /* _SYS_EVENTHANDLER_H_ */
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#define IF_AFDATA_LOCK_INIT(ifp) \
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rw_init(&(ifp)->if_afdata_lock, "if_afdata")
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#define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock)
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#define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock)
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#define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock)
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#define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock)
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#define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp)
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#define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp)
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#define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock)
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#define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock)
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#define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED)
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#define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED)
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#define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED)
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#define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED)
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static __inline void
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if_initbaudrate(struct ifnet *ifp, uintmax_t baud)
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{
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ifp->if_baudrate_pf = 0;
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while (baud > (u_long)(~0UL)) {
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baud /= 10;
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ifp->if_baudrate_pf++;
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}
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ifp->if_baudrate = baud;
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}
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/*
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* 72 was chosen below because it is the size of a TCP/IP
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* header (40) + the minimum mss (32).
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*/
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#define IF_MINMTU 72
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#define IF_MAXMTU 65535
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#define TOEDEV(ifp) ((ifp)->if_llsoftc)
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#endif /* _KERNEL */
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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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* NOTE: a 'struct ifaddr' is always at the beginning of a larger
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* chunk of malloc'ed memory, where we store the three addresses
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* (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
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*/
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#if defined(_KERNEL) || defined(_WANT_IFADDR)
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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 carp_softc *ifa_carp; /* pointer to CARP data */
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TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
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void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
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(int, struct rtentry *, struct rt_addrinfo *);
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u_short ifa_flags; /* mostly rt_flags for cloning */
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u_int ifa_refcnt; /* references to this structure */
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int ifa_metric; /* cost of going out this interface */
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int (*ifa_claim_addr) /* check if an addr goes to this if */
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(struct ifaddr *, struct sockaddr *);
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counter_u64_t ifa_ipackets;
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counter_u64_t ifa_opackets;
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counter_u64_t ifa_ibytes;
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counter_u64_t ifa_obytes;
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};
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#endif
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#ifdef _KERNEL
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#define IFA_ROUTE RTF_UP /* route installed */
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#define IFA_RTSELF RTF_HOST /* loopback route to self installed */
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/* For compatibility with other BSDs. SCTP uses it. */
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#define ifa_list ifa_link
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struct ifaddr * ifa_alloc(size_t size, int flags);
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void ifa_free(struct ifaddr *ifa);
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void ifa_ref(struct ifaddr *ifa);
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#endif /* _KERNEL */
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/*
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* Multicast address structure. This is analogous to the ifaddr
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* structure except that it keeps track of multicast addresses.
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*/
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struct ifmultiaddr {
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TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
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struct sockaddr *ifma_addr; /* address this membership is for */
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struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
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struct ifnet *ifma_ifp; /* back-pointer to interface */
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u_int ifma_refcount; /* reference count */
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void *ifma_protospec; /* protocol-specific state, if any */
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struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
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};
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#ifdef _KERNEL
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extern struct rwlock ifnet_rwlock;
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extern struct sx ifnet_sxlock;
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#define IFNET_LOCK_INIT() do { \
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rw_init_flags(&ifnet_rwlock, "ifnet_rw", RW_RECURSE); \
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sx_init_flags(&ifnet_sxlock, "ifnet_sx", SX_RECURSE); \
|
|
} while(0)
|
|
|
|
#define IFNET_WLOCK() do { \
|
|
sx_xlock(&ifnet_sxlock); \
|
|
rw_wlock(&ifnet_rwlock); \
|
|
} while (0)
|
|
|
|
#define IFNET_WUNLOCK() do { \
|
|
rw_wunlock(&ifnet_rwlock); \
|
|
sx_xunlock(&ifnet_sxlock); \
|
|
} while (0)
|
|
|
|
/*
|
|
* To assert the ifnet lock, you must know not only whether it's for read or
|
|
* write, but also whether it was acquired with sleep support or not.
|
|
*/
|
|
#define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED)
|
|
#define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED)
|
|
#define IFNET_WLOCK_ASSERT() do { \
|
|
sx_assert(&ifnet_sxlock, SA_XLOCKED); \
|
|
rw_assert(&ifnet_rwlock, RA_WLOCKED); \
|
|
} while (0)
|
|
|
|
#define IFNET_RLOCK() sx_slock(&ifnet_sxlock)
|
|
#define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock)
|
|
#define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock)
|
|
#define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock)
|
|
|
|
/*
|
|
* Look up an ifnet given its index; the _ref variant also acquires a
|
|
* reference that must be freed using if_rele(). It is almost always a bug
|
|
* to call ifnet_byindex() instead if ifnet_byindex_ref().
|
|
*/
|
|
struct ifnet *ifnet_byindex(u_short idx);
|
|
struct ifnet *ifnet_byindex_locked(u_short idx);
|
|
struct ifnet *ifnet_byindex_ref(u_short idx);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
struct ifaddr *ifaddr_byindex(u_short idx);
|
|
|
|
VNET_DECLARE(struct ifnethead, ifnet);
|
|
VNET_DECLARE(struct ifgrouphead, ifg_head);
|
|
VNET_DECLARE(int, if_index);
|
|
VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */
|
|
|
|
#define V_ifnet VNET(ifnet)
|
|
#define V_ifg_head VNET(ifg_head)
|
|
#define V_if_index VNET(if_index)
|
|
#define V_loif VNET(loif)
|
|
|
|
int if_addgroup(struct ifnet *, const char *);
|
|
int if_delgroup(struct ifnet *, const char *);
|
|
int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
|
|
int if_allmulti(struct ifnet *, int);
|
|
struct ifnet* if_alloc(u_char);
|
|
void if_attach(struct ifnet *);
|
|
void if_dead(struct ifnet *);
|
|
int if_delmulti(struct ifnet *, struct sockaddr *);
|
|
void if_delmulti_ifma(struct ifmultiaddr *);
|
|
void if_detach(struct ifnet *);
|
|
void if_vmove(struct ifnet *, struct vnet *);
|
|
void if_purgeaddrs(struct ifnet *);
|
|
void if_delallmulti(struct ifnet *);
|
|
void if_down(struct ifnet *);
|
|
struct ifmultiaddr *
|
|
if_findmulti(struct ifnet *, struct sockaddr *);
|
|
void if_free(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);
|
|
void if_ref(struct ifnet *);
|
|
void if_rele(struct ifnet *);
|
|
int if_setlladdr(struct ifnet *, const u_char *, int);
|
|
void if_up(struct ifnet *);
|
|
int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
|
|
int ifpromisc(struct ifnet *, int);
|
|
struct ifnet *ifunit(const char *);
|
|
struct ifnet *ifunit_ref(const char *);
|
|
|
|
int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
|
|
int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
|
|
int ifa_switch_loopback_route(struct ifaddr *, struct sockaddr *);
|
|
|
|
struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
|
|
int ifa_ifwithaddr_check(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithnet(struct sockaddr *, int);
|
|
struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
|
|
struct ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int);
|
|
struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
|
|
int ifa_preferred(struct ifaddr *, struct ifaddr *);
|
|
|
|
int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
|
|
|
|
typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
|
|
typedef void if_com_free_t(void *com, u_char type);
|
|
void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
|
|
void if_deregister_com_alloc(u_char type);
|
|
|
|
#define IF_LLADDR(ifp) \
|
|
LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* !_NET_IF_VAR_H_ */
|