diff options
Diffstat (limited to 'freebsd/netatalk/aarp.c')
| -rw-r--r-- | freebsd/netatalk/aarp.c | 726 |
1 files changed, 726 insertions, 0 deletions
diff --git a/freebsd/netatalk/aarp.c b/freebsd/netatalk/aarp.c new file mode 100644 index 00000000..63fabede --- /dev/null +++ b/freebsd/netatalk/aarp.c @@ -0,0 +1,726 @@ +#include <freebsd/machine/rtems-bsd-config.h> + +/*- + * 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 + * + * $FreeBSD$ + */ + +#include <freebsd/local/opt_atalk.h> + +#include <freebsd/sys/param.h> +#include <freebsd/sys/systm.h> +#include <freebsd/sys/mbuf.h> +#include <freebsd/sys/kernel.h> +#include <freebsd/sys/socket.h> +#include <freebsd/sys/syslog.h> + +#include <freebsd/net/if.h> +#include <freebsd/net/if_dl.h> + +#include <freebsd/netinet/in.h> +#undef s_net +#include <freebsd/netinet/if_ether.h> + +#include <freebsd/netatalk/at.h> +#include <freebsd/netatalk/at_var.h> +#include <freebsd/netatalk/aarp.h> +#include <freebsd/netatalk/phase2.h> +#include <freebsd/netatalk/at_extern.h> + +#include <freebsd/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_LOCK(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_UNLOCK(ifp); + m_freem(m); + return; + } + ifa_ref(&aa->aa_ifa); + IF_ADDR_UNLOCK(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(); +} |