if_atmsubr.c revision 147256
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 147256 2005-06-10 16:49:24Z brooks $"); 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 141116720Sharti if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING)) 14225603Skjc senderr(ENETDOWN); 14325603Skjc 14425603Skjc /* 14525603Skjc * check for non-native ATM traffic (dst != NULL) 14625603Skjc */ 14725603Skjc if (dst) { 14825603Skjc switch (dst->sa_family) { 149116720Sharti 15037939Skjc#if defined(INET) || defined(INET6) 15125603Skjc case AF_INET: 15237939Skjc case AF_INET6: 153128636Sluigi { 154128636Sluigi struct rtentry *rt; 155128636Sluigi /* 156128636Sluigi * check route 157128636Sluigi */ 158128636Sluigi error = rt_check(&rt, &rt0, dst); 159128636Sluigi if (error) 160128636Sluigi goto bad; 161128636Sluigi 16246695Skjc if (dst->sa_family == AF_INET6) 163112193Sharti etype = ETHERTYPE_IPV6; 16446695Skjc else 165112193Sharti etype = ETHERTYPE_IP; 16625603Skjc if (!atmresolve(rt, m, dst, &atmdst)) { 16725603Skjc m = NULL; 16825603Skjc /* XXX: atmresolve already free'd it */ 16925603Skjc senderr(EHOSTUNREACH); 17025603Skjc /* XXX: put ATMARP stuff here */ 17125603Skjc /* XXX: watch who frees m on failure */ 17225603Skjc } 173128636Sluigi } 17425603Skjc break; 17537939Skjc#endif /* INET || INET6 */ 17625603Skjc 17737939Skjc case AF_UNSPEC: 17837939Skjc /* 17946695Skjc * XXX: bpfwrite. assuming dst contains 12 bytes 18046695Skjc * (atm pseudo header (4) + LLC/SNAP (8)) 18137939Skjc */ 18237939Skjc bcopy(dst->sa_data, &atmdst, sizeof(atmdst)); 183116720Sharti llc_hdr = (struct atmllc *)(dst->sa_data + 184116720Sharti sizeof(atmdst)); 18537939Skjc break; 18637939Skjc 18725603Skjc default: 188121816Sbrooks#if (defined(__FreeBSD__) && __FreeBSD_version >= 501113) || \ 189121816Sbrooks defined(__NetBSD__) || defined(__OpenBSD__) 19025603Skjc printf("%s: can't handle af%d\n", ifp->if_xname, 19125603Skjc dst->sa_family); 19225603Skjc#elif defined(__FreeBSD__) || defined(__bsdi__) 19325603Skjc printf("%s%d: can't handle af%d\n", ifp->if_name, 19425603Skjc ifp->if_unit, dst->sa_family); 19525603Skjc#endif 19625603Skjc senderr(EAFNOSUPPORT); 19725603Skjc } 19825603Skjc 19925603Skjc /* 20025603Skjc * must add atm_pseudohdr to data 20125603Skjc */ 20225603Skjc sz = sizeof(atmdst); 20325603Skjc atm_flags = ATM_PH_FLAGS(&atmdst); 204116720Sharti if (atm_flags & ATM_PH_LLCSNAP) 205116720Sharti sz += 8; /* sizeof snap == 8 */ 206111119Simp M_PREPEND(m, sz, M_DONTWAIT); 20725603Skjc if (m == 0) 20825603Skjc senderr(ENOBUFS); 20925603Skjc ad = mtod(m, struct atm_pseudohdr *); 21025603Skjc *ad = atmdst; 21125603Skjc if (atm_flags & ATM_PH_LLCSNAP) { 21225603Skjc atmllc = (struct atmllc *)(ad + 1); 21337939Skjc if (llc_hdr == NULL) { 21437939Skjc bcopy(ATMLLC_HDR, atmllc->llchdr, 21537939Skjc sizeof(atmllc->llchdr)); 216116720Sharti /* note: in host order */ 21737939Skjc ATM_LLC_SETTYPE(atmllc, etype); 21837939Skjc } 21937939Skjc else 22037939Skjc bcopy(llc_hdr, atmllc, sizeof(struct atmllc)); 22125603Skjc } 22225603Skjc } 22325603Skjc 224116741Sharti if (ng_atm_output_p != NULL) { 225116741Sharti if ((error = (*ng_atm_output_p)(ifp, &m)) != 0) { 226116741Sharti if (m != NULL) 227116741Sharti m_freem(m); 228116741Sharti return (error); 229116741Sharti } 230116741Sharti if (m == NULL) 231116741Sharti return (0); 232116741Sharti } 233116741Sharti 23425603Skjc /* 23525603Skjc * Queue message on interface, and start output if interface 23625603Skjc * not yet active. 23725603Skjc */ 238117629Sharti if (!IF_HANDOFF_ADJ(&ifp->if_snd, m, ifp, 239117629Sharti -(int)sizeof(struct atm_pseudohdr))) 24069152Sjlemon return (ENOBUFS); 24125603Skjc return (error); 24225603Skjc 24325603Skjcbad: 24425603Skjc if (m) 24525603Skjc m_freem(m); 24625603Skjc return (error); 24725603Skjc} 24825603Skjc 24925603Skjc/* 25025603Skjc * Process a received ATM packet; 25125603Skjc * the packet is in the mbuf chain m. 25225603Skjc */ 25325603Skjcvoid 254116720Shartiatm_input(struct ifnet *ifp, struct atm_pseudohdr *ah, struct mbuf *m, 255116720Sharti void *rxhand) 25625603Skjc{ 257111888Sjlemon int isr; 258116720Sharti u_int16_t etype = ETHERTYPE_IP; /* default */ 259124283Sharti#ifdef NATM 26025603Skjc int s; 261124283Sharti#endif 26225603Skjc 26325603Skjc if ((ifp->if_flags & IFF_UP) == 0) { 26425603Skjc m_freem(m); 26525603Skjc return; 26625603Skjc } 267105576Srwatson#ifdef MAC 268105576Srwatson mac_create_mbuf_from_ifnet(ifp, m); 269105576Srwatson#endif 27025603Skjc ifp->if_ibytes += m->m_pkthdr.len; 27125603Skjc 272116741Sharti if (ng_atm_input_p != NULL) { 273116741Sharti (*ng_atm_input_p)(ifp, &m, ah, rxhand); 274116741Sharti if (m == NULL) 275116741Sharti return; 276116741Sharti } 277116741Sharti 278116741Sharti /* not eaten by ng_atm. Maybe it's a pseudo-harp PDU? */ 279116741Sharti if (atm_harp_input_p != NULL) { 280116741Sharti (*atm_harp_input_p)(ifp, &m, ah, rxhand); 281116741Sharti if (m == NULL) 282116741Sharti return; 283116741Sharti } 284116741Sharti 28525603Skjc if (rxhand) { 28625603Skjc#ifdef NATM 28737939Skjc struct natmpcb *npcb = rxhand; 288116720Sharti 28937939Skjc s = splimp(); /* in case 2 atm cards @ diff lvls */ 29037939Skjc npcb->npcb_inq++; /* count # in queue */ 29137939Skjc splx(s); 292111888Sjlemon isr = NETISR_NATM; 29337939Skjc m->m_pkthdr.rcvif = rxhand; /* XXX: overload */ 29425603Skjc#else 295116720Sharti printf("atm_input: NATM detected but not " 296116720Sharti "configured in kernel\n"); 297116741Sharti goto dropit; 29825603Skjc#endif 29925603Skjc } else { 30037939Skjc /* 30137939Skjc * handle LLC/SNAP header, if present 30237939Skjc */ 30337939Skjc if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) { 30437939Skjc struct atmllc *alc; 305116720Sharti 30637939Skjc if (m->m_len < sizeof(*alc) && 30737939Skjc (m = m_pullup(m, sizeof(*alc))) == 0) 30837939Skjc return; /* failed */ 30937939Skjc alc = mtod(m, struct atmllc *); 31037939Skjc if (bcmp(alc, ATMLLC_HDR, 6)) { 311121816Sbrooks#if (defined(__FreeBSD__) && __FreeBSD_version >= 501113) || \ 312121816Sbrooks defined(__NetBSD__) || defined(__OpenBSD__) 313116720Sharti printf("%s: recv'd invalid LLC/SNAP frame " 314116720Sharti "[vp=%d,vc=%d]\n", ifp->if_xname, 315116720Sharti ATM_PH_VPI(ah), ATM_PH_VCI(ah)); 31625603Skjc#elif defined(__FreeBSD__) || defined(__bsdi__) 317116720Sharti printf("%s%d: recv'd invalid LLC/SNAP frame " 318116720Sharti "[vp=%d,vc=%d]\n", ifp->if_name, 319116720Sharti ifp->if_unit, ATM_PH_VPI(ah), 320116720Sharti ATM_PH_VCI(ah)); 32125603Skjc#endif 32237939Skjc m_freem(m); 32337939Skjc return; 32437939Skjc } 32537939Skjc etype = ATM_LLC_TYPE(alc); 32637939Skjc m_adj(m, sizeof(*alc)); 32737939Skjc } 32825603Skjc 32937939Skjc switch (etype) { 330116720Sharti 33125603Skjc#ifdef INET 33237939Skjc case ETHERTYPE_IP: 333111888Sjlemon isr = NETISR_IP; 33437939Skjc break; 33525603Skjc#endif 336116720Sharti 33737939Skjc#ifdef INET6 33837939Skjc case ETHERTYPE_IPV6: 339111888Sjlemon isr = NETISR_IPV6; 34037939Skjc break; 34137939Skjc#endif 34237939Skjc default: 343116741Sharti#ifndef NATM 344116741Sharti dropit: 345116741Sharti#endif 346116741Sharti if (ng_atm_input_orphan_p != NULL) 347116741Sharti (*ng_atm_input_orphan_p)(ifp, m, ah, rxhand); 348116741Sharti else 349116741Sharti m_freem(m); 35037939Skjc return; 35137939Skjc } 35225603Skjc } 353111888Sjlemon netisr_dispatch(isr, m); 35425603Skjc} 35525603Skjc 35625603Skjc/* 357114201Sharti * Perform common duties while attaching to interface list. 35825603Skjc */ 35925603Skjcvoid 360116720Shartiatm_ifattach(struct ifnet *ifp) 36125603Skjc{ 362111774Smdodd struct ifaddr *ifa; 363111774Smdodd struct sockaddr_dl *sdl; 364147256Sbrooks struct ifatm *ifatm = ifp->if_l2com; 36525603Skjc 36625603Skjc ifp->if_addrlen = 0; 36725603Skjc ifp->if_hdrlen = 0; 368114201Sharti if_attach(ifp); 36925603Skjc ifp->if_mtu = ATMMTU; 37025603Skjc ifp->if_output = atm_output; 371106939Ssam#if 0 372106939Ssam ifp->if_input = atm_input; 373106939Ssam#endif 37446695Skjc ifp->if_snd.ifq_maxlen = 50; /* dummy */ 37525603Skjc 37625603Skjc#if defined(__NetBSD__) || defined(__OpenBSD__) 37772012Sphk TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 37837939Skjc#elif defined(__FreeBSD__) && (__FreeBSD__ > 2) 37971959Sphk for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa; 38071959Sphk ifa = TAILQ_NEXT(ifa, ifa_link)) 38125603Skjc#elif defined(__FreeBSD__) || defined(__bsdi__) 38225603Skjc for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) 38325603Skjc#endif 38425603Skjc if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && 38525603Skjc sdl->sdl_family == AF_LINK) { 38625603Skjc sdl->sdl_type = IFT_ATM; 38725603Skjc sdl->sdl_alen = ifp->if_addrlen; 38825603Skjc#ifdef notyet /* if using ATMARP, store hardware address using the next line */ 38925603Skjc bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen); 39025603Skjc#endif 39125603Skjc break; 39225603Skjc } 39337939Skjc 394114739Sharti ifp->if_linkmib = &ifatm->mib; 395114739Sharti ifp->if_linkmiblen = sizeof(ifatm->mib); 396116741Sharti 397116741Sharti if(ng_atm_attach_p) 398116741Sharti (*ng_atm_attach_p)(ifp); 399116741Sharti if (atm_harp_attach_p) 400116741Sharti (*atm_harp_attach_p)(ifp); 40137939Skjc} 402114201Sharti 403114201Sharti/* 404114201Sharti * Common stuff for detaching an ATM interface 405114201Sharti */ 406114201Shartivoid 407114201Shartiatm_ifdetach(struct ifnet *ifp) 408114201Sharti{ 409116741Sharti if (atm_harp_detach_p) 410116741Sharti (*atm_harp_detach_p)(ifp); 411116741Sharti if(ng_atm_detach_p) 412116741Sharti (*ng_atm_detach_p)(ifp); 413114201Sharti if_detach(ifp); 414114201Sharti} 415114201Sharti 416117630Sharti/* 417117630Sharti * Support routine for the SIOCATMGVCCS ioctl(). 418117630Sharti * 419117630Sharti * This routine assumes, that the private VCC structures used by the driver 420117630Sharti * begin with a struct atmio_vcc. 421117630Sharti * 422117630Sharti * Return a table of VCCs in a freshly allocated memory area. 423117630Sharti * Here we have a problem: we first count, how many vccs we need 424117630Sharti * to return. The we allocate the memory and finally fill it in. 425117630Sharti * Because we cannot lock while calling malloc, the number of active 426117630Sharti * vccs may change while we're in malloc. So we allocate a couple of 427117630Sharti * vccs more and if space anyway is not enough re-iterate. 428117630Sharti * 429117630Sharti * We could use an sx lock for the vcc tables. 430117630Sharti */ 431117630Shartistruct atmio_vcctable * 432117630Shartiatm_getvccs(struct atmio_vcc **table, u_int size, u_int start, 433117630Sharti struct mtx *lock, int waitok) 434117630Sharti{ 435117630Sharti u_int cid, alloc; 436117630Sharti size_t len; 437117630Sharti struct atmio_vcctable *vccs; 438117630Sharti struct atmio_vcc *v; 439117630Sharti 440117630Sharti alloc = start + 10; 441117630Sharti vccs = NULL; 442117630Sharti 443117630Sharti for (;;) { 444117630Sharti len = sizeof(*vccs) + alloc * sizeof(vccs->vccs[0]); 445117630Sharti vccs = reallocf(vccs, len, M_TEMP, 446117630Sharti waitok ? M_WAITOK : M_NOWAIT); 447117630Sharti if (vccs == NULL) 448117630Sharti return (NULL); 449117630Sharti bzero(vccs, len); 450117630Sharti 451117630Sharti vccs->count = 0; 452117630Sharti v = vccs->vccs; 453117630Sharti 454117630Sharti mtx_lock(lock); 455117630Sharti for (cid = 0; cid < size; cid++) 456117630Sharti if (table[cid] != NULL) { 457117630Sharti if (++vccs->count == alloc) 458117630Sharti /* too many - try again */ 459117630Sharti break; 460117630Sharti *v++ = *table[cid]; 461117630Sharti } 462117630Sharti mtx_unlock(lock); 463117630Sharti 464117630Sharti if (cid == size) 465117630Sharti break; 466117630Sharti 467117630Sharti alloc *= 2; 468117630Sharti } 469117630Sharti return (vccs); 470117630Sharti} 471117630Sharti 472118157Sharti/* 473118157Sharti * Driver or channel state has changed. Inform whoever is interested 474118157Sharti * in these events. 475118157Sharti */ 476118157Shartivoid 477118157Shartiatm_event(struct ifnet *ifp, u_int event, void *arg) 478118157Sharti{ 479118157Sharti if (ng_atm_event_p != NULL) 480118157Sharti (*ng_atm_event_p)(ifp, event, arg); 481118157Sharti if (atm_harp_event_p != NULL) 482118157Sharti (*atm_harp_event_p)(ifp, event, arg); 483118157Sharti} 484118157Sharti 485147256Sbrooksstatic void * 486147256Sbrooksatm_alloc(u_char type, struct ifnet *ifp) 487147256Sbrooks{ 488147256Sbrooks struct ifatm *ifatm; 489147256Sbrooks 490147256Sbrooks ifatm = malloc(sizeof(struct ifatm), M_IFATM, M_WAITOK | M_ZERO); 491147256Sbrooks ifatm->ifp = ifp; 492147256Sbrooks 493147256Sbrooks return (ifatm); 494147256Sbrooks} 495147256Sbrooks 496147256Sbrooksstatic void 497147256Sbrooksatm_free(void *com, u_char type) 498147256Sbrooks{ 499147256Sbrooks 500147256Sbrooks free(com, M_IFATM); 501147256Sbrooks} 502147256Sbrooks 503147256Sbrooksstatic int 504147256Sbrooksatm_modevent(module_t mod, int type, void *data) 505147256Sbrooks{ 506147256Sbrooks switch (type) { 507147256Sbrooks case MOD_LOAD: 508147256Sbrooks if_register_com_alloc(IFT_ATM, atm_alloc, atm_free); 509147256Sbrooks break; 510147256Sbrooks case MOD_UNLOAD: 511147256Sbrooks if_deregister_com_alloc(IFT_ATM); 512147256Sbrooks break; 513147256Sbrooks default: 514147256Sbrooks return (EOPNOTSUPP); 515147256Sbrooks } 516147256Sbrooks 517147256Sbrooks return (0); 518147256Sbrooks} 519147256Sbrooks 520114201Shartistatic moduledata_t atm_mod = { 521114201Sharti "atm", 522147256Sbrooks atm_modevent, 523114201Sharti 0 524114201Sharti}; 525114201Sharti 526147256SbrooksDECLARE_MODULE(atm, atm_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 527114201ShartiMODULE_VERSION(atm, 1); 528