if_atmsubr.c revision 160038
125603Skjc/* $NetBSD: if_atmsubr.c,v 1.10 1997/03/11 23:19:51 chuck Exp $ */ 225603Skjc 3139823Simp/*- 425603Skjc * 525603Skjc * Copyright (c) 1996 Charles D. Cranor and Washington University. 625603Skjc * All rights reserved. 725603Skjc * 825603Skjc * Redistribution and use in source and binary forms, with or without 925603Skjc * modification, are permitted provided that the following conditions 1025603Skjc * are met: 1125603Skjc * 1. Redistributions of source code must retain the above copyright 1225603Skjc * notice, this list of conditions and the following disclaimer. 1325603Skjc * 2. Redistributions in binary form must reproduce the above copyright 1425603Skjc * notice, this list of conditions and the following disclaimer in the 1525603Skjc * documentation and/or other materials provided with the distribution. 1625603Skjc * 3. All advertising materials mentioning features or use of this software 1725603Skjc * must display the following acknowledgement: 1825603Skjc * This product includes software developed by Charles D. Cranor and 1925603Skjc * Washington University. 2025603Skjc * 4. The name of the author may not be used to endorse or promote products 2125603Skjc * derived from this software without specific prior written permission. 2225603Skjc * 2325603Skjc * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 2425603Skjc * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2525603Skjc * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2625603Skjc * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2725603Skjc * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2825603Skjc * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2925603Skjc * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3025603Skjc * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3125603Skjc * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 3225603Skjc * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3354263Sshin * 3425603Skjc * if_atmsubr.c 3525603Skjc */ 3625603Skjc 37116720Sharti#include <sys/cdefs.h> 38116720Sharti__FBSDID("$FreeBSD: head/sys/net/if_atmsubr.c 160038 2006-06-29 19:22:05Z yar $"); 39116720Sharti 4032350Seivind#include "opt_inet.h" 4154263Sshin#include "opt_inet6.h" 42105576Srwatson#include "opt_mac.h" 4332925Seivind#include "opt_natm.h" 4432350Seivind 4525603Skjc#include <sys/param.h> 4625603Skjc#include <sys/systm.h> 47114201Sharti#include <sys/kernel.h> 48114201Sharti#include <sys/module.h> 49105576Srwatson#include <sys/mac.h> 5025603Skjc#include <sys/mbuf.h> 5125603Skjc#include <sys/socket.h> 5237939Skjc#include <sys/sockio.h> 5337939Skjc#include <sys/errno.h> 54114201Sharti#include <sys/sysctl.h> 55117630Sharti#include <sys/malloc.h> 5625603Skjc 5725603Skjc#include <net/if.h> 5825603Skjc#include <net/netisr.h> 5925603Skjc#include <net/route.h> 6025603Skjc#include <net/if_dl.h> 6125603Skjc#include <net/if_types.h> 6225603Skjc#include <net/if_atm.h> 6325603Skjc 6425603Skjc#include <netinet/in.h> 6525603Skjc#include <netinet/if_atm.h> 6625603Skjc#include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */ 6737939Skjc#if defined(INET) || defined(INET6) 6825603Skjc#include <netinet/in_var.h> 6925603Skjc#endif 7025603Skjc#ifdef NATM 7125603Skjc#include <netnatm/natm.h> 7225603Skjc#endif 7325603Skjc 74116741Sharti/* 75116741Sharti * Netgraph interface functions. 76116741Sharti * These need not be protected by a lock, because ng_atm nodes are persitent. 77116741Sharti * The ng_atm module can be unloaded only if all ATM interfaces have been 78116741Sharti * unloaded, so nobody should be in the code paths accessing these function 79116741Sharti * pointers. 80116741Sharti */ 81116741Shartivoid (*ng_atm_attach_p)(struct ifnet *); 82116741Shartivoid (*ng_atm_detach_p)(struct ifnet *); 83116741Shartiint (*ng_atm_output_p)(struct ifnet *, struct mbuf **); 84116741Shartivoid (*ng_atm_input_p)(struct ifnet *, struct mbuf **, 85116741Sharti struct atm_pseudohdr *, void *); 86116741Shartivoid (*ng_atm_input_orphan_p)(struct ifnet *, struct mbuf *, 87116741Sharti struct atm_pseudohdr *, void *); 88118157Shartivoid (*ng_atm_event_p)(struct ifnet *, uint32_t, void *); 89116741Sharti 90116741Sharti/* 91116741Sharti * Harp pseudo interface hooks 92116741Sharti */ 93116741Shartivoid (*atm_harp_input_p)(struct ifnet *ifp, struct mbuf **m, 94116741Sharti struct atm_pseudohdr *ah, void *rxhand); 95116741Shartivoid (*atm_harp_attach_p)(struct ifnet *); 96116741Shartivoid (*atm_harp_detach_p)(struct ifnet *); 97118157Shartivoid (*atm_harp_event_p)(struct ifnet *, uint32_t, void *); 98116741Sharti 99114201ShartiSYSCTL_NODE(_hw, OID_AUTO, atm, CTLFLAG_RW, 0, "ATM hardware"); 100114201Sharti 101147256SbrooksMALLOC_DEFINE(M_IFATM, "ifatm", "atm interface internals"); 102147256Sbrooks 10337939Skjc#ifndef ETHERTYPE_IPV6 104116720Sharti#define ETHERTYPE_IPV6 0x86dd 10537939Skjc#endif 10625603Skjc 107116720Sharti#define senderr(e) do { error = (e); goto bad; } while (0) 10825603Skjc 10925603Skjc/* 11025603Skjc * atm_output: ATM output routine 11125603Skjc * inputs: 11225603Skjc * "ifp" = ATM interface to output to 11325603Skjc * "m0" = the packet to output 11425603Skjc * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI) 11525603Skjc * "rt0" = the route to use 11625603Skjc * returns: error code [0 == ok] 11725603Skjc * 11825603Skjc * note: special semantic: if (dst == NULL) then we assume "m" already 11925603Skjc * has an atm_pseudohdr on it and just send it directly. 12025603Skjc * [for native mode ATM output] if dst is null, then 12125603Skjc * rt0 must also be NULL. 12225603Skjc */ 12325603Skjcint 124116720Shartiatm_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 125116720Sharti struct rtentry *rt0) 12625603Skjc{ 12725603Skjc u_int16_t etype = 0; /* if using LLC/SNAP */ 12878249Speter int error = 0, sz; 12925603Skjc struct atm_pseudohdr atmdst, *ad; 13059633Skjc struct mbuf *m = m0; 13125603Skjc struct atmllc *atmllc; 13237939Skjc struct atmllc *llc_hdr = NULL; 13325603Skjc u_int32_t atm_flags; 13425603Skjc 135105576Srwatson#ifdef MAC 136105576Srwatson error = mac_check_ifnet_transmit(ifp, m); 137105576Srwatson if (error) 138105576Srwatson senderr(error); 139105576Srwatson#endif 140105576Srwatson 141148887Srwatson if (!((ifp->if_flags & IFF_UP) && 142148887Srwatson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 14325603Skjc senderr(ENETDOWN); 14425603Skjc 14525603Skjc /* 14625603Skjc * check for non-native ATM traffic (dst != NULL) 14725603Skjc */ 14825603Skjc if (dst) { 14925603Skjc switch (dst->sa_family) { 150116720Sharti 15137939Skjc#if defined(INET) || defined(INET6) 15225603Skjc case AF_INET: 15337939Skjc case AF_INET6: 154128636Sluigi { 155148954Sglebius struct rtentry *rt = NULL; 156128636Sluigi /* 157128636Sluigi * check route 158128636Sluigi */ 159148954Sglebius if (rt0 != NULL) { 160148954Sglebius error = rt_check(&rt, &rt0, dst); 161148954Sglebius if (error) 162148954Sglebius goto bad; 163148954Sglebius RT_UNLOCK(rt); 164148954Sglebius } 165128636Sluigi 16646695Skjc if (dst->sa_family == AF_INET6) 167112193Sharti etype = ETHERTYPE_IPV6; 16846695Skjc else 169112193Sharti etype = ETHERTYPE_IP; 17025603Skjc if (!atmresolve(rt, m, dst, &atmdst)) { 17125603Skjc m = NULL; 17225603Skjc /* XXX: atmresolve already free'd it */ 17325603Skjc senderr(EHOSTUNREACH); 17425603Skjc /* XXX: put ATMARP stuff here */ 17525603Skjc /* XXX: watch who frees m on failure */ 17625603Skjc } 177128636Sluigi } 17825603Skjc break; 17937939Skjc#endif /* INET || INET6 */ 18025603Skjc 18137939Skjc case AF_UNSPEC: 18237939Skjc /* 18346695Skjc * XXX: bpfwrite. assuming dst contains 12 bytes 18446695Skjc * (atm pseudo header (4) + LLC/SNAP (8)) 18537939Skjc */ 18637939Skjc bcopy(dst->sa_data, &atmdst, sizeof(atmdst)); 187116720Sharti llc_hdr = (struct atmllc *)(dst->sa_data + 188116720Sharti sizeof(atmdst)); 18937939Skjc break; 19037939Skjc 19125603Skjc default: 192121816Sbrooks#if (defined(__FreeBSD__) && __FreeBSD_version >= 501113) || \ 193121816Sbrooks defined(__NetBSD__) || defined(__OpenBSD__) 19425603Skjc printf("%s: can't handle af%d\n", ifp->if_xname, 19525603Skjc dst->sa_family); 19625603Skjc#elif defined(__FreeBSD__) || defined(__bsdi__) 19725603Skjc printf("%s%d: can't handle af%d\n", ifp->if_name, 19825603Skjc ifp->if_unit, dst->sa_family); 19925603Skjc#endif 20025603Skjc senderr(EAFNOSUPPORT); 20125603Skjc } 20225603Skjc 20325603Skjc /* 20425603Skjc * must add atm_pseudohdr to data 20525603Skjc */ 20625603Skjc sz = sizeof(atmdst); 20725603Skjc atm_flags = ATM_PH_FLAGS(&atmdst); 208116720Sharti if (atm_flags & ATM_PH_LLCSNAP) 209116720Sharti sz += 8; /* sizeof snap == 8 */ 210111119Simp M_PREPEND(m, sz, M_DONTWAIT); 21125603Skjc if (m == 0) 21225603Skjc senderr(ENOBUFS); 21325603Skjc ad = mtod(m, struct atm_pseudohdr *); 21425603Skjc *ad = atmdst; 21525603Skjc if (atm_flags & ATM_PH_LLCSNAP) { 21625603Skjc atmllc = (struct atmllc *)(ad + 1); 21737939Skjc if (llc_hdr == NULL) { 21837939Skjc bcopy(ATMLLC_HDR, atmllc->llchdr, 21937939Skjc sizeof(atmllc->llchdr)); 220116720Sharti /* note: in host order */ 22137939Skjc ATM_LLC_SETTYPE(atmllc, etype); 22237939Skjc } 22337939Skjc else 22437939Skjc bcopy(llc_hdr, atmllc, sizeof(struct atmllc)); 22525603Skjc } 22625603Skjc } 22725603Skjc 228116741Sharti if (ng_atm_output_p != NULL) { 229116741Sharti if ((error = (*ng_atm_output_p)(ifp, &m)) != 0) { 230116741Sharti if (m != NULL) 231116741Sharti m_freem(m); 232116741Sharti return (error); 233116741Sharti } 234116741Sharti if (m == NULL) 235116741Sharti return (0); 236116741Sharti } 237116741Sharti 23825603Skjc /* 23925603Skjc * Queue message on interface, and start output if interface 24025603Skjc * not yet active. 24125603Skjc */ 242117629Sharti if (!IF_HANDOFF_ADJ(&ifp->if_snd, m, ifp, 243117629Sharti -(int)sizeof(struct atm_pseudohdr))) 24469152Sjlemon return (ENOBUFS); 24525603Skjc return (error); 24625603Skjc 24725603Skjcbad: 24825603Skjc if (m) 24925603Skjc m_freem(m); 25025603Skjc return (error); 25125603Skjc} 25225603Skjc 25325603Skjc/* 25425603Skjc * Process a received ATM packet; 25525603Skjc * the packet is in the mbuf chain m. 25625603Skjc */ 25725603Skjcvoid 258116720Shartiatm_input(struct ifnet *ifp, struct atm_pseudohdr *ah, struct mbuf *m, 259116720Sharti void *rxhand) 26025603Skjc{ 261111888Sjlemon int isr; 262116720Sharti u_int16_t etype = ETHERTYPE_IP; /* default */ 26325603Skjc 26425603Skjc if ((ifp->if_flags & IFF_UP) == 0) { 26525603Skjc m_freem(m); 26625603Skjc return; 26725603Skjc } 268105576Srwatson#ifdef MAC 269105576Srwatson mac_create_mbuf_from_ifnet(ifp, m); 270105576Srwatson#endif 27125603Skjc ifp->if_ibytes += m->m_pkthdr.len; 27225603Skjc 273116741Sharti if (ng_atm_input_p != NULL) { 274116741Sharti (*ng_atm_input_p)(ifp, &m, ah, rxhand); 275116741Sharti if (m == NULL) 276116741Sharti return; 277116741Sharti } 278116741Sharti 279116741Sharti /* not eaten by ng_atm. Maybe it's a pseudo-harp PDU? */ 280116741Sharti if (atm_harp_input_p != NULL) { 281116741Sharti (*atm_harp_input_p)(ifp, &m, ah, rxhand); 282116741Sharti if (m == NULL) 283116741Sharti return; 284116741Sharti } 285116741Sharti 28625603Skjc if (rxhand) { 28725603Skjc#ifdef NATM 288148125Srwatson struct natmpcb *npcb; 289116720Sharti 290148125Srwatson /* 291148125Srwatson * XXXRW: this use of 'rxhand' is not a very good idea, and 292148125Srwatson * was subject to races even before SMPng due to the release 293148125Srwatson * of spl here. 294148125Srwatson */ 295148125Srwatson NATM_LOCK(); 296148125Srwatson npcb = rxhand; 29737939Skjc npcb->npcb_inq++; /* count # in queue */ 298111888Sjlemon isr = NETISR_NATM; 29937939Skjc m->m_pkthdr.rcvif = rxhand; /* XXX: overload */ 300148125Srwatson NATM_UNLOCK(); 30125603Skjc#else 302116720Sharti printf("atm_input: NATM detected but not " 303116720Sharti "configured in kernel\n"); 304116741Sharti goto dropit; 30525603Skjc#endif 30625603Skjc } else { 30737939Skjc /* 30837939Skjc * handle LLC/SNAP header, if present 30937939Skjc */ 31037939Skjc if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) { 31137939Skjc struct atmllc *alc; 312116720Sharti 31337939Skjc if (m->m_len < sizeof(*alc) && 31437939Skjc (m = m_pullup(m, sizeof(*alc))) == 0) 31537939Skjc return; /* failed */ 31637939Skjc alc = mtod(m, struct atmllc *); 31737939Skjc if (bcmp(alc, ATMLLC_HDR, 6)) { 318121816Sbrooks#if (defined(__FreeBSD__) && __FreeBSD_version >= 501113) || \ 319121816Sbrooks defined(__NetBSD__) || defined(__OpenBSD__) 320116720Sharti printf("%s: recv'd invalid LLC/SNAP frame " 321116720Sharti "[vp=%d,vc=%d]\n", ifp->if_xname, 322116720Sharti ATM_PH_VPI(ah), ATM_PH_VCI(ah)); 32325603Skjc#elif defined(__FreeBSD__) || defined(__bsdi__) 324116720Sharti printf("%s%d: recv'd invalid LLC/SNAP frame " 325116720Sharti "[vp=%d,vc=%d]\n", ifp->if_name, 326116720Sharti ifp->if_unit, ATM_PH_VPI(ah), 327116720Sharti ATM_PH_VCI(ah)); 32825603Skjc#endif 32937939Skjc m_freem(m); 33037939Skjc return; 33137939Skjc } 33237939Skjc etype = ATM_LLC_TYPE(alc); 33337939Skjc m_adj(m, sizeof(*alc)); 33437939Skjc } 33525603Skjc 33637939Skjc switch (etype) { 337116720Sharti 33825603Skjc#ifdef INET 33937939Skjc case ETHERTYPE_IP: 340111888Sjlemon isr = NETISR_IP; 34137939Skjc break; 34225603Skjc#endif 343116720Sharti 34437939Skjc#ifdef INET6 34537939Skjc case ETHERTYPE_IPV6: 346111888Sjlemon isr = NETISR_IPV6; 34737939Skjc break; 34837939Skjc#endif 34937939Skjc default: 350116741Sharti#ifndef NATM 351116741Sharti dropit: 352116741Sharti#endif 353116741Sharti if (ng_atm_input_orphan_p != NULL) 354116741Sharti (*ng_atm_input_orphan_p)(ifp, m, ah, rxhand); 355116741Sharti else 356116741Sharti m_freem(m); 35737939Skjc return; 35837939Skjc } 35925603Skjc } 360111888Sjlemon netisr_dispatch(isr, m); 36125603Skjc} 36225603Skjc 36325603Skjc/* 364114201Sharti * Perform common duties while attaching to interface list. 36525603Skjc */ 36625603Skjcvoid 367116720Shartiatm_ifattach(struct ifnet *ifp) 36825603Skjc{ 369111774Smdodd struct ifaddr *ifa; 370111774Smdodd struct sockaddr_dl *sdl; 371147256Sbrooks struct ifatm *ifatm = ifp->if_l2com; 37225603Skjc 37325603Skjc ifp->if_addrlen = 0; 37425603Skjc ifp->if_hdrlen = 0; 375114201Sharti if_attach(ifp); 37625603Skjc ifp->if_mtu = ATMMTU; 37725603Skjc ifp->if_output = atm_output; 378106939Ssam#if 0 379106939Ssam ifp->if_input = atm_input; 380106939Ssam#endif 38146695Skjc ifp->if_snd.ifq_maxlen = 50; /* dummy */ 38225603Skjc 38325603Skjc#if defined(__NetBSD__) || defined(__OpenBSD__) 38472012Sphk TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 38537939Skjc#elif defined(__FreeBSD__) && (__FreeBSD__ > 2) 386160035Syar TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 38725603Skjc#elif defined(__FreeBSD__) || defined(__bsdi__) 38825603Skjc for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) 38925603Skjc#endif 390160038Syar if (ifa->ifa_addr->sa_family == AF_LINK) { 391160038Syar sdl = (struct sockaddr_dl *)ifa->ifa_addr; 39225603Skjc sdl->sdl_type = IFT_ATM; 39325603Skjc sdl->sdl_alen = ifp->if_addrlen; 39425603Skjc#ifdef notyet /* if using ATMARP, store hardware address using the next line */ 39525603Skjc bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen); 39625603Skjc#endif 39725603Skjc break; 39825603Skjc } 39937939Skjc 400114739Sharti ifp->if_linkmib = &ifatm->mib; 401114739Sharti ifp->if_linkmiblen = sizeof(ifatm->mib); 402116741Sharti 403116741Sharti if(ng_atm_attach_p) 404116741Sharti (*ng_atm_attach_p)(ifp); 405116741Sharti if (atm_harp_attach_p) 406116741Sharti (*atm_harp_attach_p)(ifp); 40737939Skjc} 408114201Sharti 409114201Sharti/* 410114201Sharti * Common stuff for detaching an ATM interface 411114201Sharti */ 412114201Shartivoid 413114201Shartiatm_ifdetach(struct ifnet *ifp) 414114201Sharti{ 415116741Sharti if (atm_harp_detach_p) 416116741Sharti (*atm_harp_detach_p)(ifp); 417116741Sharti if(ng_atm_detach_p) 418116741Sharti (*ng_atm_detach_p)(ifp); 419114201Sharti if_detach(ifp); 420114201Sharti} 421114201Sharti 422117630Sharti/* 423117630Sharti * Support routine for the SIOCATMGVCCS ioctl(). 424117630Sharti * 425117630Sharti * This routine assumes, that the private VCC structures used by the driver 426117630Sharti * begin with a struct atmio_vcc. 427117630Sharti * 428117630Sharti * Return a table of VCCs in a freshly allocated memory area. 429117630Sharti * Here we have a problem: we first count, how many vccs we need 430117630Sharti * to return. The we allocate the memory and finally fill it in. 431117630Sharti * Because we cannot lock while calling malloc, the number of active 432117630Sharti * vccs may change while we're in malloc. So we allocate a couple of 433117630Sharti * vccs more and if space anyway is not enough re-iterate. 434117630Sharti * 435117630Sharti * We could use an sx lock for the vcc tables. 436117630Sharti */ 437117630Shartistruct atmio_vcctable * 438117630Shartiatm_getvccs(struct atmio_vcc **table, u_int size, u_int start, 439117630Sharti struct mtx *lock, int waitok) 440117630Sharti{ 441117630Sharti u_int cid, alloc; 442117630Sharti size_t len; 443117630Sharti struct atmio_vcctable *vccs; 444117630Sharti struct atmio_vcc *v; 445117630Sharti 446117630Sharti alloc = start + 10; 447117630Sharti vccs = NULL; 448117630Sharti 449117630Sharti for (;;) { 450117630Sharti len = sizeof(*vccs) + alloc * sizeof(vccs->vccs[0]); 451117630Sharti vccs = reallocf(vccs, len, M_TEMP, 452117630Sharti waitok ? M_WAITOK : M_NOWAIT); 453117630Sharti if (vccs == NULL) 454117630Sharti return (NULL); 455117630Sharti bzero(vccs, len); 456117630Sharti 457117630Sharti vccs->count = 0; 458117630Sharti v = vccs->vccs; 459117630Sharti 460117630Sharti mtx_lock(lock); 461117630Sharti for (cid = 0; cid < size; cid++) 462117630Sharti if (table[cid] != NULL) { 463117630Sharti if (++vccs->count == alloc) 464117630Sharti /* too many - try again */ 465117630Sharti break; 466117630Sharti *v++ = *table[cid]; 467117630Sharti } 468117630Sharti mtx_unlock(lock); 469117630Sharti 470117630Sharti if (cid == size) 471117630Sharti break; 472117630Sharti 473117630Sharti alloc *= 2; 474117630Sharti } 475117630Sharti return (vccs); 476117630Sharti} 477117630Sharti 478118157Sharti/* 479118157Sharti * Driver or channel state has changed. Inform whoever is interested 480118157Sharti * in these events. 481118157Sharti */ 482118157Shartivoid 483118157Shartiatm_event(struct ifnet *ifp, u_int event, void *arg) 484118157Sharti{ 485118157Sharti if (ng_atm_event_p != NULL) 486118157Sharti (*ng_atm_event_p)(ifp, event, arg); 487118157Sharti if (atm_harp_event_p != NULL) 488118157Sharti (*atm_harp_event_p)(ifp, event, arg); 489118157Sharti} 490118157Sharti 491147256Sbrooksstatic void * 492147256Sbrooksatm_alloc(u_char type, struct ifnet *ifp) 493147256Sbrooks{ 494147256Sbrooks struct ifatm *ifatm; 495147256Sbrooks 496147256Sbrooks ifatm = malloc(sizeof(struct ifatm), M_IFATM, M_WAITOK | M_ZERO); 497147256Sbrooks ifatm->ifp = ifp; 498147256Sbrooks 499147256Sbrooks return (ifatm); 500147256Sbrooks} 501147256Sbrooks 502147256Sbrooksstatic void 503147256Sbrooksatm_free(void *com, u_char type) 504147256Sbrooks{ 505147256Sbrooks 506147256Sbrooks free(com, M_IFATM); 507147256Sbrooks} 508147256Sbrooks 509147256Sbrooksstatic int 510147256Sbrooksatm_modevent(module_t mod, int type, void *data) 511147256Sbrooks{ 512147256Sbrooks switch (type) { 513147256Sbrooks case MOD_LOAD: 514147256Sbrooks if_register_com_alloc(IFT_ATM, atm_alloc, atm_free); 515147256Sbrooks break; 516147256Sbrooks case MOD_UNLOAD: 517147256Sbrooks if_deregister_com_alloc(IFT_ATM); 518147256Sbrooks break; 519147256Sbrooks default: 520147256Sbrooks return (EOPNOTSUPP); 521147256Sbrooks } 522147256Sbrooks 523147256Sbrooks return (0); 524147256Sbrooks} 525147256Sbrooks 526114201Shartistatic moduledata_t atm_mod = { 527114201Sharti "atm", 528147256Sbrooks atm_modevent, 529114201Sharti 0 530114201Sharti}; 531114201Sharti 532147256SbrooksDECLARE_MODULE(atm, atm_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 533114201ShartiMODULE_VERSION(atm, 1); 534