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/*-
* Copyright (c) 2004-2009 Robert N. M. Watson
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* Copyright (c) 1990,1991,1994 Regents of The University of Michigan.
* All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation, and that the name of The University
* of Michigan not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. This software is supplied as is without expressed or
* implied warranties of any kind.
*
* This product includes software developed by the University of
* California, Berkeley and its contributors.
*
* Research Systems Unix Group
* The University of Michigan
* c/o Wesley Craig
* 535 W. William Street
* Ann Arbor, Michigan
* +1-313-764-2278
* netatalk@umich.edu
*
* $FreeBSD: release/9.1.0/sys/netatalk/aarp.c 233200 2012-03-19 20:49:16Z jhb $
*/
#include "opt_atalk.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#undef s_net
#include <netinet/if_ether.h>
#include <netatalk/at.h>
#include <netatalk/at_var.h>
#include <netatalk/aarp.h>
#include <netatalk/phase2.h>
#include <netatalk/at_extern.h>
#include <security/mac/mac_framework.h>
static void aarptfree(struct aarptab *aat);
static void at_aarpinput(struct ifnet *ifp, struct mbuf *m);
#define AARPTAB_BSIZ 9
#define AARPTAB_NB 19
#define AARPTAB_SIZE (AARPTAB_BSIZ * AARPTAB_NB)
static struct aarptab aarptab[AARPTAB_SIZE];
struct mtx aarptab_mtx;
MTX_SYSINIT(aarptab_mtx, &aarptab_mtx, "aarptab_mtx", MTX_DEF);
#define AARPTAB_HASH(a) ((((a).s_net << 8) + (a).s_node) % AARPTAB_NB)
#define AARPTAB_LOOK(aat, addr) do { \
int n; \
\
AARPTAB_LOCK_ASSERT(); \
aat = &aarptab[ AARPTAB_HASH(addr) * AARPTAB_BSIZ ]; \
for (n = 0; n < AARPTAB_BSIZ; n++, aat++) { \
if (aat->aat_ataddr.s_net == (addr).s_net && \
aat->aat_ataddr.s_node == (addr).s_node) \
break; \
} \
if (n >= AARPTAB_BSIZ) \
aat = NULL; \
} while (0)
#define AARPT_AGE (60 * 1)
#define AARPT_KILLC 20
#define AARPT_KILLI 3
static const u_char atmulticastaddr[6] = {
0x09, 0x00, 0x07, 0xff, 0xff, 0xff,
};
u_char at_org_code[3] = {
0x08, 0x00, 0x07,
};
const u_char aarp_org_code[3] = {
0x00, 0x00, 0x00,
};
static struct callout_handle aarptimer_ch =
CALLOUT_HANDLE_INITIALIZER(&aarptimer_ch);
static void
aarptimer(void *ignored)
{
struct aarptab *aat;
int i;
aarptimer_ch = timeout(aarptimer, NULL, AARPT_AGE * hz);
aat = aarptab;
AARPTAB_LOCK();
for (i = 0; i < AARPTAB_SIZE; i++, aat++) {
if (aat->aat_flags == 0 || (aat->aat_flags & ATF_PERM))
continue;
if (++aat->aat_timer < ((aat->aat_flags & ATF_COM) ?
AARPT_KILLC : AARPT_KILLI))
continue;
aarptfree(aat);
}
AARPTAB_UNLOCK();
}
/*
* Search through the network addresses to find one that includes the given
* network. Remember to take netranges into consideration.
*
* The _locked variant relies on the caller holding the at_ifaddr lock; the
* unlocked variant returns a reference that the caller must dispose of.
*/
struct at_ifaddr *
at_ifawithnet_locked(struct sockaddr_at *sat)
{
struct at_ifaddr *aa;
struct sockaddr_at *sat2;
AT_IFADDR_LOCK_ASSERT();
TAILQ_FOREACH(aa, &at_ifaddrhead, aa_link) {
sat2 = &(aa->aa_addr);
if (sat2->sat_addr.s_net == sat->sat_addr.s_net)
break;
if ((aa->aa_flags & AFA_PHASE2) &&
(ntohs(aa->aa_firstnet) <= ntohs(sat->sat_addr.s_net)) &&
(ntohs(aa->aa_lastnet) >= ntohs(sat->sat_addr.s_net)))
break;
}
return (aa);
}
struct at_ifaddr *
at_ifawithnet(struct sockaddr_at *sat)
{
struct at_ifaddr *aa;
AT_IFADDR_RLOCK();
aa = at_ifawithnet_locked(sat);
if (aa != NULL)
ifa_ref(&aa->aa_ifa);
AT_IFADDR_RUNLOCK();
return (aa);
}
static void
aarpwhohas(struct ifnet *ifp, struct sockaddr_at *sat)
{
struct mbuf *m;
struct ether_header *eh;
struct ether_aarp *ea;
struct at_ifaddr *aa;
struct llc *llc;
struct sockaddr sa;
AARPTAB_UNLOCK_ASSERT();
m = m_gethdr(M_DONTWAIT, MT_DATA);
if (m == NULL)
return;
#ifdef MAC
mac_netatalk_aarp_send(ifp, m);
#endif
m->m_len = sizeof(*ea);
m->m_pkthdr.len = sizeof(*ea);
MH_ALIGN(m, sizeof(*ea));
ea = mtod(m, struct ether_aarp *);
bzero((caddr_t)ea, sizeof(*ea));
ea->aarp_hrd = htons(AARPHRD_ETHER);
ea->aarp_pro = htons(ETHERTYPE_AT);
ea->aarp_hln = sizeof(ea->aarp_sha);
ea->aarp_pln = sizeof(ea->aarp_spu);
ea->aarp_op = htons(AARPOP_REQUEST);
bcopy(IF_LLADDR(ifp), (caddr_t)ea->aarp_sha, sizeof(ea->aarp_sha));
/*
* We need to check whether the output ethernet type should be phase
* 1 or 2. We have the interface that we'll be sending the aarp out.
* We need to find an AppleTalk network on that interface with the
* same address as we're looking for. If the net is phase 2,
* generate an 802.2 and SNAP header.
*/
aa = at_ifawithnet(sat);
if (aa == NULL) {
m_freem(m);
return;
}
eh = (struct ether_header *)sa.sa_data;
if (aa->aa_flags & AFA_PHASE2) {
bcopy(atmulticastaddr, eh->ether_dhost,
sizeof(eh->ether_dhost));
eh->ether_type = htons(sizeof(struct llc) +
sizeof(struct ether_aarp));
M_PREPEND(m, sizeof(struct llc), M_DONTWAIT);
if (m == NULL) {
ifa_free(&aa->aa_ifa);
return;
}
llc = mtod(m, struct llc *);
llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
llc->llc_control = LLC_UI;
bcopy(aarp_org_code, llc->llc_org_code,
sizeof(aarp_org_code));
llc->llc_ether_type = htons(ETHERTYPE_AARP);
bcopy(&AA_SAT(aa)->sat_addr.s_net, ea->aarp_spnet,
sizeof(ea->aarp_spnet));
bcopy(&sat->sat_addr.s_net, ea->aarp_tpnet,
sizeof(ea->aarp_tpnet));
ea->aarp_spnode = AA_SAT(aa)->sat_addr.s_node;
ea->aarp_tpnode = sat->sat_addr.s_node;
} else {
bcopy(ifp->if_broadcastaddr, (caddr_t)eh->ether_dhost,
sizeof(eh->ether_dhost));
eh->ether_type = htons(ETHERTYPE_AARP);
ea->aarp_spa = AA_SAT(aa)->sat_addr.s_node;
ea->aarp_tpa = sat->sat_addr.s_node;
}
#ifdef NETATALKDEBUG
printf("aarp: sending request for %u.%u\n",
ntohs(AA_SAT(aa)->sat_addr.s_net), AA_SAT(aa)->sat_addr.s_node);
#endif /* NETATALKDEBUG */
ifa_free(&aa->aa_ifa);
sa.sa_len = sizeof(struct sockaddr);
sa.sa_family = AF_UNSPEC;
ifp->if_output(ifp, m, &sa, NULL);
}
int
aarpresolve(struct ifnet *ifp, struct mbuf *m, struct sockaddr_at *destsat,
u_char *desten)
{
struct at_ifaddr *aa;
struct aarptab *aat;
AT_IFADDR_RLOCK();
if (at_broadcast(destsat)) {
m->m_flags |= M_BCAST;
if ((aa = at_ifawithnet_locked(destsat)) == NULL) {
AT_IFADDR_RUNLOCK();
m_freem(m);
return (0);
}
if (aa->aa_flags & AFA_PHASE2)
bcopy(atmulticastaddr, (caddr_t)desten,
sizeof(atmulticastaddr));
else
bcopy(ifp->if_broadcastaddr, (caddr_t)desten,
sizeof(ifp->if_addrlen));
AT_IFADDR_RUNLOCK();
return (1);
}
AT_IFADDR_RUNLOCK();
AARPTAB_LOCK();
AARPTAB_LOOK(aat, destsat->sat_addr);
if (aat == NULL) {
/* No entry. */
aat = aarptnew(&destsat->sat_addr);
/* We should fail more gracefully. */
if (aat == NULL)
panic("aarpresolve: no free entry");
goto done;
}
/* Found an entry. */
aat->aat_timer = 0;
if (aat->aat_flags & ATF_COM) {
/* Entry is COMplete. */
bcopy((caddr_t)aat->aat_enaddr, (caddr_t)desten,
sizeof(aat->aat_enaddr));
AARPTAB_UNLOCK();
return (1);
}
/* Entry has not completed. */
if (aat->aat_hold)
m_freem(aat->aat_hold);
done:
aat->aat_hold = m;
AARPTAB_UNLOCK();
aarpwhohas(ifp, destsat);
return (0);
}
void
aarpintr(struct mbuf *m)
{
struct arphdr *ar;
struct ifnet *ifp;
ifp = m->m_pkthdr.rcvif;
if (ifp->if_flags & IFF_NOARP)
goto out;
if (m->m_len < sizeof(struct arphdr))
goto out;
ar = mtod(m, struct arphdr *);
if (ntohs(ar->ar_hrd) != AARPHRD_ETHER)
goto out;
if (m->m_len < sizeof(struct arphdr) + 2 * ar->ar_hln +
2 * ar->ar_pln)
goto out;
switch(ntohs(ar->ar_pro)) {
case ETHERTYPE_AT:
at_aarpinput(ifp, m);
return;
default:
break;
}
out:
m_freem(m);
}
static void
at_aarpinput(struct ifnet *ifp, struct mbuf *m)
{
struct ether_aarp *ea;
struct at_ifaddr *aa;
struct aarptab *aat;
struct ether_header *eh;
struct llc *llc;
struct sockaddr_at sat;
struct sockaddr sa;
struct at_addr spa, tpa, ma;
int op;
u_short net;
ea = mtod(m, struct ether_aarp *);
/* Check to see if from my hardware address. */
if (!bcmp((caddr_t)ea->aarp_sha, IF_LLADDR(ifp), ETHER_ADDR_LEN)) {
m_freem(m);
return;
}
/* Don't accept requests from broadcast address. */
if (!bcmp(ea->aarp_sha, ifp->if_broadcastaddr, ifp->if_addrlen)) {
log(LOG_ERR, "aarp: source link address is broadcast\n");
m_freem(m);
return;
}
op = ntohs(ea->aarp_op);
bcopy(ea->aarp_tpnet, &net, sizeof(net));
if (net != 0) {
/* Should be ATADDR_ANYNET? */
sat.sat_len = sizeof(struct sockaddr_at);
sat.sat_family = AF_APPLETALK;
sat.sat_addr.s_net = net;
aa = at_ifawithnet(&sat);
if (aa == NULL) {
m_freem(m);
return;
}
bcopy(ea->aarp_spnet, &spa.s_net, sizeof(spa.s_net));
bcopy(ea->aarp_tpnet, &tpa.s_net, sizeof(tpa.s_net));
} else {
/*
* Since we don't know the net, we just look for the first
* phase 1 address on the interface.
*/
IF_ADDR_RLOCK(ifp);
for (aa = (struct at_ifaddr *)TAILQ_FIRST(&ifp->if_addrhead);
aa;
aa = (struct at_ifaddr *)aa->aa_ifa.ifa_link.tqe_next) {
if (AA_SAT(aa)->sat_family == AF_APPLETALK &&
(aa->aa_flags & AFA_PHASE2) == 0) {
break;
}
}
if (aa == NULL) {
IF_ADDR_RUNLOCK(ifp);
m_freem(m);
return;
}
ifa_ref(&aa->aa_ifa);
IF_ADDR_RUNLOCK(ifp);
tpa.s_net = spa.s_net = AA_SAT(aa)->sat_addr.s_net;
}
spa.s_node = ea->aarp_spnode;
tpa.s_node = ea->aarp_tpnode;
ma.s_net = AA_SAT(aa)->sat_addr.s_net;
ma.s_node = AA_SAT(aa)->sat_addr.s_node;
/*
* This looks like it's from us.
*/
if (spa.s_net == ma.s_net && spa.s_node == ma.s_node) {
if (aa->aa_flags & AFA_PROBING) {
/*
* We're probing, someone either responded to our
* probe, or probed for the same address we'd like to
* use. Change the address we're probing for.
*/
callout_stop(&aa->aa_callout);
wakeup(aa);
ifa_free(&aa->aa_ifa);
m_freem(m);
return;
} else if (op != AARPOP_PROBE) {
/*
* This is not a probe, and we're not probing. This
* means that someone's saying they have the same
* source address as the one we're using. Get upset.
*/
ifa_free(&aa->aa_ifa);
log(LOG_ERR,
"aarp: duplicate AT address!! %x:%x:%x:%x:%x:%x\n",
ea->aarp_sha[0], ea->aarp_sha[1],
ea->aarp_sha[2], ea->aarp_sha[3],
ea->aarp_sha[4], ea->aarp_sha[5]);
m_freem(m);
return;
}
}
AARPTAB_LOCK();
AARPTAB_LOOK(aat, spa);
if (aat != NULL) {
if (op == AARPOP_PROBE) {
/*
* Someone's probing for spa, dealocate the one we've
* got, so that if the prober keeps the address,
* we'll be able to arp for him.
*/
aarptfree(aat);
AARPTAB_UNLOCK();
ifa_free(&aa->aa_ifa);
m_freem(m);
return;
}
bcopy((caddr_t)ea->aarp_sha, (caddr_t)aat->aat_enaddr,
sizeof(ea->aarp_sha));
aat->aat_flags |= ATF_COM;
if (aat->aat_hold) {
struct mbuf *mhold = aat->aat_hold;
aat->aat_hold = NULL;
AARPTAB_UNLOCK();
sat.sat_len = sizeof(struct sockaddr_at);
sat.sat_family = AF_APPLETALK;
sat.sat_addr = spa;
(*ifp->if_output)(ifp, mhold,
(struct sockaddr *)&sat, NULL); /* XXX */
} else
AARPTAB_UNLOCK();
} else if ((tpa.s_net == ma.s_net) && (tpa.s_node == ma.s_node)
&& (op != AARPOP_PROBE) && ((aat = aarptnew(&spa)) != NULL)) {
bcopy((caddr_t)ea->aarp_sha, (caddr_t)aat->aat_enaddr,
sizeof(ea->aarp_sha));
aat->aat_flags |= ATF_COM;
AARPTAB_UNLOCK();
} else
AARPTAB_UNLOCK();
/*
* Don't respond to responses, and never respond if we're still
* probing.
*/
if (tpa.s_net != ma.s_net || tpa.s_node != ma.s_node ||
op == AARPOP_RESPONSE || (aa->aa_flags & AFA_PROBING)) {
ifa_free(&aa->aa_ifa);
m_freem(m);
return;
}
bcopy((caddr_t)ea->aarp_sha, (caddr_t)ea->aarp_tha,
sizeof(ea->aarp_sha));
bcopy(IF_LLADDR(ifp), (caddr_t)ea->aarp_sha, sizeof(ea->aarp_sha));
/* XXX */
eh = (struct ether_header *)sa.sa_data;
bcopy((caddr_t)ea->aarp_tha, (caddr_t)eh->ether_dhost,
sizeof(eh->ether_dhost));
if (aa->aa_flags & AFA_PHASE2) {
eh->ether_type = htons(sizeof(struct llc) +
sizeof(struct ether_aarp));
M_PREPEND(m, sizeof(struct llc), M_DONTWAIT);
if (m == NULL) {
ifa_free(&aa->aa_ifa);
return;
}
llc = mtod(m, struct llc *);
llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
llc->llc_control = LLC_UI;
bcopy(aarp_org_code, llc->llc_org_code,
sizeof(aarp_org_code));
llc->llc_ether_type = htons(ETHERTYPE_AARP);
bcopy(ea->aarp_spnet, ea->aarp_tpnet,
sizeof(ea->aarp_tpnet));
bcopy(&ma.s_net, ea->aarp_spnet, sizeof(ea->aarp_spnet));
} else
eh->ether_type = htons(ETHERTYPE_AARP);
ifa_free(&aa->aa_ifa);
ea->aarp_tpnode = ea->aarp_spnode;
ea->aarp_spnode = ma.s_node;
ea->aarp_op = htons(AARPOP_RESPONSE);
sa.sa_len = sizeof(struct sockaddr);
sa.sa_family = AF_UNSPEC;
(*ifp->if_output)(ifp, m, &sa, NULL); /* XXX */
return;
}
static void
aarptfree(struct aarptab *aat)
{
AARPTAB_LOCK_ASSERT();
if (aat->aat_hold)
m_freem(aat->aat_hold);
aat->aat_hold = NULL;
aat->aat_timer = aat->aat_flags = 0;
aat->aat_ataddr.s_net = 0;
aat->aat_ataddr.s_node = 0;
}
struct aarptab *
aarptnew(struct at_addr *addr)
{
int n;
int oldest = -1;
struct aarptab *aat, *aato = NULL;
static int first = 1;
AARPTAB_LOCK_ASSERT();
if (first) {
first = 0;
aarptimer_ch = timeout(aarptimer, (caddr_t)0, hz);
}
aat = &aarptab[AARPTAB_HASH(*addr) * AARPTAB_BSIZ];
for (n = 0; n < AARPTAB_BSIZ; n++, aat++) {
if (aat->aat_flags == 0)
goto out;
if (aat->aat_flags & ATF_PERM)
continue;
if ((int) aat->aat_timer > oldest) {
oldest = aat->aat_timer;
aato = aat;
}
}
if (aato == NULL)
return (NULL);
aat = aato;
aarptfree(aat);
out:
aat->aat_ataddr = *addr;
aat->aat_flags = ATF_INUSE;
return (aat);
}
void
aarpprobe(void *arg)
{
struct ifnet *ifp = arg;
struct mbuf *m;
struct ether_header *eh;
struct ether_aarp *ea;
struct at_ifaddr *aa;
struct llc *llc;
struct sockaddr sa;
/*
* We need to check whether the output ethernet type should be phase
* 1 or 2. We have the interface that we'll be sending the aarp out.
* We need to find an AppleTalk network on that interface with the
* same address as we're looking for. If the net is phase 2,
* generate an 802.2 and SNAP header.
*/
AARPTAB_LOCK();
for (aa = (struct at_ifaddr *)TAILQ_FIRST(&ifp->if_addrhead); aa;
aa = (struct at_ifaddr *)aa->aa_ifa.ifa_link.tqe_next) {
if (AA_SAT(aa)->sat_family == AF_APPLETALK &&
(aa->aa_flags & AFA_PROBING))
break;
}
if (aa == NULL) {
/* Serious error XXX. */
AARPTAB_UNLOCK();
printf("aarpprobe why did this happen?!\n");
return;
}
if (aa->aa_probcnt <= 0) {
aa->aa_flags &= ~AFA_PROBING;
wakeup(aa);
AARPTAB_UNLOCK();
return;
} else
callout_reset(&aa->aa_callout, hz / 5, aarpprobe, ifp);
ifa_ref(&aa->aa_ifa);
AARPTAB_UNLOCK();
m = m_gethdr(M_DONTWAIT, MT_DATA);
if (m == NULL) {
ifa_free(&aa->aa_ifa);
return;
}
#ifdef MAC
mac_netatalk_aarp_send(ifp, m);
#endif
m->m_len = sizeof(*ea);
m->m_pkthdr.len = sizeof(*ea);
MH_ALIGN(m, sizeof(*ea));
ea = mtod(m, struct ether_aarp *);
bzero((caddr_t)ea, sizeof(*ea));
ea->aarp_hrd = htons(AARPHRD_ETHER);
ea->aarp_pro = htons(ETHERTYPE_AT);
ea->aarp_hln = sizeof(ea->aarp_sha);
ea->aarp_pln = sizeof(ea->aarp_spu);
ea->aarp_op = htons(AARPOP_PROBE);
bcopy(IF_LLADDR(ifp), (caddr_t)ea->aarp_sha,
sizeof(ea->aarp_sha));
eh = (struct ether_header *)sa.sa_data;
if (aa->aa_flags & AFA_PHASE2) {
bcopy(atmulticastaddr, eh->ether_dhost,
sizeof(eh->ether_dhost));
eh->ether_type = htons(sizeof(struct llc) +
sizeof(struct ether_aarp));
M_PREPEND(m, sizeof(struct llc), M_WAIT);
llc = mtod(m, struct llc *);
llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
llc->llc_control = LLC_UI;
bcopy(aarp_org_code, llc->llc_org_code,
sizeof(aarp_org_code));
llc->llc_ether_type = htons(ETHERTYPE_AARP);
bcopy(&AA_SAT(aa)->sat_addr.s_net, ea->aarp_spnet,
sizeof(ea->aarp_spnet));
bcopy(&AA_SAT(aa)->sat_addr.s_net, ea->aarp_tpnet,
sizeof(ea->aarp_tpnet));
ea->aarp_spnode = ea->aarp_tpnode =
AA_SAT(aa)->sat_addr.s_node;
} else {
bcopy(ifp->if_broadcastaddr, (caddr_t)eh->ether_dhost,
sizeof(eh->ether_dhost));
eh->ether_type = htons(ETHERTYPE_AARP);
ea->aarp_spa = ea->aarp_tpa = AA_SAT(aa)->sat_addr.s_node;
}
#ifdef NETATALKDEBUG
printf("aarp: sending probe for %u.%u\n",
ntohs(AA_SAT(aa)->sat_addr.s_net), AA_SAT(aa)->sat_addr.s_node);
#endif /* NETATALKDEBUG */
ifa_free(&aa->aa_ifa);
sa.sa_len = sizeof(struct sockaddr);
sa.sa_family = AF_UNSPEC;
(*ifp->if_output)(ifp, m, &sa, NULL); /* XXX */
aa->aa_probcnt--;
}
void
aarp_clean(void)
{
struct aarptab *aat;
int i;
untimeout(aarptimer, 0, aarptimer_ch);
AARPTAB_LOCK();
for (i = 0, aat = aarptab; i < AARPTAB_SIZE; i++, aat++) {
if (aat->aat_hold) {
m_freem(aat->aat_hold);
aat->aat_hold = NULL;
}
}
AARPTAB_UNLOCK();
}