/* $NetBSD: if_tokensubr.c,v 1.32 2005/05/30 04:17:59 christos Exp $ */ /* * Copyright (c) 1982, 1989, 1993 * The Regents of the University of California. 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * from: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp */ /* * Copyright (c) 1997-1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Onno van der Linden. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by The NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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) 1995 * Matt Thomas. 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. * 3. The names of its contributors may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * from: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp */ #include __KERNEL_RCSID(0, "$NetBSD: if_tokensubr.c,v 1.32 2005/05/30 04:17:59 christos Exp $"); #include "opt_inet.h" #include "opt_atalk.h" #include "opt_ccitt.h" #include "opt_llc.h" #include "opt_iso.h" #include "opt_ns.h" #include "opt_gateway.h" #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif #include #include #ifdef INET #include #include #include #endif #ifdef NS #include #include #endif #ifdef DECNET #include #endif #ifdef ISO #include #include #include #include #endif #include "bpfilter.h" #ifdef LLC #include #include #endif /* * TODO: * handle source routing via send_xid() * source routing for ISO,LLC,CCITT protocols * need sockaddr_dl_8025 to handle this correctly * IPX cases * handle "fast" forwarding like if_ether and if_fddi */ #if defined(LLC) && defined(CCITT) extern struct ifqueue pkintrq; #endif #define senderr(e) { error = (e); goto bad;} #if defined(__bsdi__) || defined(__NetBSD__) #define RTALLOC1(a, b) rtalloc1(a, b) #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e) #define TYPEHTONS(t) (t) #elif defined(__FreeBSD__) #define RTALLOC1(a, b) rtalloc1(a, b, 0UL) #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f) #define TYPEHTONS(t) (htons(t)) #endif #define RCF_ALLROUTES (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_ALL #define RCF_SINGLEROUTE (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_SINGLE static int token_output __P((struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *)); static void token_input __P((struct ifnet *, struct mbuf *)); /* * Token Ring output routine. * Encapsulate a packet of type family for the local net. * Assumes that ifp is actually pointer to arphdr structure. * XXX route info has to go into the same mbuf as the header */ static int token_output(ifp, m0, dst, rt0) struct ifnet *ifp; struct mbuf *m0; struct sockaddr *dst; struct rtentry *rt0; { u_int16_t etype; int error = 0; u_char edst[ISO88025_ADDR_LEN]; struct mbuf *m = m0; struct rtentry *rt; struct mbuf *mcopy = (struct mbuf *)0; struct token_header *trh; #ifdef INET struct arphdr *ah = (struct arphdr *)ifp; #endif /* INET */ struct token_rif *rif = (struct token_rif *)0; struct token_rif bcastrif; size_t riflen = 0; ALTQ_DECL(struct altq_pktattr pktattr;) if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) senderr(ENETDOWN); if ((rt = rt0)) { if ((rt->rt_flags & RTF_UP) == 0) { if ((rt0 = rt = RTALLOC1(dst, 1))) rt->rt_refcnt--; else senderr(EHOSTUNREACH); } if (rt->rt_flags & RTF_GATEWAY) { if (rt->rt_gwroute == 0) goto lookup; if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { rtfree(rt); rt = rt0; lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 1); if ((rt = rt->rt_gwroute) == 0) senderr(EHOSTUNREACH); } } if (rt->rt_flags & RTF_REJECT) if (rt->rt_rmx.rmx_expire == 0 || time.tv_sec < rt->rt_rmx.rmx_expire) senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); } /* * If the queueing discipline needs packet classification, * do it before prepending link headers. */ IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); switch (dst->sa_family) { #ifdef INET case AF_INET: if (m->m_flags & M_BCAST) { if (ifp->if_flags & IFF_LINK0) { if (ifp->if_flags & IFF_LINK1) bcastrif.tr_rcf = htons(RCF_ALLROUTES); else bcastrif.tr_rcf = htons(RCF_SINGLEROUTE); rif = &bcastrif; riflen = sizeof(rif->tr_rcf); } memcpy(edst, tokenbroadcastaddr, sizeof(edst)); } /* * XXX m->m_flags & M_MCAST IEEE802_MAP_IP_MULTICAST ?? */ else { if (!ARPRESOLVE(ifp, rt, m, dst, edst, rt0)) return (0); /* if not yet resolved */ rif = TOKEN_RIF((struct llinfo_arp *) rt->rt_llinfo); riflen = (ntohs(rif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8; } /* If broadcasting on a simplex interface, loopback a copy. */ if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) mcopy = m_copy(m, 0, (int)M_COPYALL); etype = htons(ETHERTYPE_IP); break; case AF_ARP: /* * XXX source routing, assume m->m_data contains the useful stuff */ ah = mtod(m, struct arphdr *); ah->ar_hrd = htons(ARPHRD_IEEE802); switch (ntohs(ah->ar_op)) { case ARPOP_REVREQUEST: case ARPOP_REVREPLY: etype = htons(ETHERTYPE_REVARP); break; case ARPOP_REQUEST: case ARPOP_REPLY: default: etype = htons(ETHERTYPE_ARP); } if (m->m_flags & M_BCAST) { if (ifp->if_flags & IFF_LINK0) { if (ifp->if_flags & IFF_LINK1) bcastrif.tr_rcf = htons(RCF_ALLROUTES); else bcastrif.tr_rcf = htons(RCF_SINGLEROUTE); rif = &bcastrif; riflen = sizeof(rif->tr_rcf); } memcpy(edst, tokenbroadcastaddr, sizeof(edst)); } else { bcopy((caddr_t)ar_tha(ah), (caddr_t)edst, sizeof(edst)); trh = (struct token_header *)M_TRHSTART(m); trh->token_ac = TOKEN_AC; trh->token_fc = TOKEN_FC; if (trh->token_shost[0] & TOKEN_RI_PRESENT) { struct token_rif *trrif; trrif = TOKEN_RIF(trh); riflen = (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8; } bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof(trh->token_shost)); if (riflen != 0) trh->token_shost[0] |= TOKEN_RI_PRESENT; /* * compare (m->m_data - m->m_pktdat) with (sizeof(struct token_header) + riflen + ... */ m->m_len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN); m->m_data -= (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN); m->m_pkthdr.len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN); goto send; } break; #endif #ifdef NS case AF_NS: etype = htons(ETHERTYPE_NS); bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), (caddr_t)edst, sizeof (edst)); if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) return (looutput(ifp, m, dst, rt)); /* If broadcasting on a simplex interface, loopback a copy. */ if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) mcopy = m_copy(m, 0, (int)M_COPYALL); break; #endif #ifdef ISO case AF_ISO: { int snpalen; struct llc *l; struct sockaddr_dl *sdl; if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); } else if ((error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, (char *)edst, &snpalen))) goto bad; /* Not resolved */ /* If broadcasting on a simplex interface, loopback a copy. */ if (*edst & 1) m->m_flags |= (M_BCAST|M_MCAST); if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && (mcopy = m_copy(m, 0, (int)M_COPYALL))) { M_PREPEND(mcopy, sizeof (*trh), M_DONTWAIT); if (mcopy) { trh = mtod(mcopy, struct token_header *); bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof (edst)); } } M_PREPEND(m, 3, M_DONTWAIT); if (m == NULL) return (0); etype = 0; l = mtod(m, struct llc *); l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; l->llc_control = LLC_UI; #if defined(__FreeBSD__) IFDEBUG(D_ETHER) int i; printf("token_output: sending pkt to: "); for (i=0; i < ISO88025_ADDR_LEN; i++) printf("%x ", edst[i] & 0xff); printf("\n"); ENDDEBUG #endif } break; #endif /* ISO */ #ifdef LLC /* case AF_NSAP: */ case AF_CCITT: { struct sockaddr_dl *sdl = (struct sockaddr_dl *) rt -> rt_gateway; if (sdl && sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { bcopy(LLADDR(sdl), (char *)edst, sizeof(edst)); } else { /* Not a link interface ? Funny ... */ goto bad; } if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && (mcopy = m_copy(m, 0, (int)M_COPYALL))) { M_PREPEND(mcopy, sizeof (*trh), M_DONTWAIT); if (mcopy) { trh = mtod(mcopy, struct token_header *); bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof (edst)); } } etype = 0; #ifdef LLC_DEBUG { int i; struct llc *l = mtod(m, struct llc *); printf("token_output: sending LLC2 pkt to: "); for (i=0; i < ISO88025_ADDR_LEN; i++) printf("%x ", edst[i] & 0xff); printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", etype & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff, l->llc_control & 0xff); } #endif /* LLC_DEBUG */ } break; #endif /* LLC */ case AF_UNSPEC: { struct ether_header *eh; eh = (struct ether_header *)dst->sa_data; bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); if (*edst & 1) m->m_flags |= (M_BCAST|M_MCAST); etype = TYPEHTONS(eh->ether_type); if (m->m_flags & M_BCAST) { if (ifp->if_flags & IFF_LINK0) { if (ifp->if_flags & IFF_LINK1) bcastrif.tr_rcf = htons(RCF_ALLROUTES); else bcastrif.tr_rcf = htons(RCF_SINGLEROUTE); rif = &bcastrif; riflen = sizeof(bcastrif.tr_rcf); } } break; } default: printf("%s: can't handle af%d\n", ifp->if_xname, dst->sa_family); senderr(EAFNOSUPPORT); } if (mcopy) (void) looutput(ifp, mcopy, dst, rt); if (etype != 0) { struct llc *l; M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); if (m == 0) senderr(ENOBUFS); l = mtod(m, struct llc *); l->llc_control = LLC_UI; l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; l->llc_snap.org_code[0] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0; bcopy((caddr_t) &etype, (caddr_t) &l->llc_snap.ether_type, sizeof(u_int16_t)); } /* * Add local net header. If no space in first mbuf, * allocate another. */ M_PREPEND(m, (riflen + sizeof (*trh)), M_DONTWAIT); if (m == 0) senderr(ENOBUFS); trh = mtod(m, struct token_header *); trh->token_ac = TOKEN_AC; trh->token_fc = TOKEN_FC; bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof(trh->token_shost)); if (riflen != 0) { struct token_rif *trrif; trh->token_shost[0] |= TOKEN_RI_PRESENT; trrif = TOKEN_RIF(trh); bcopy(rif, trrif, riflen); } #ifdef INET send: #endif return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); bad: if (m) m_freem(m); return (error); } /* * Process a received token ring packet; * the packet is in the mbuf chain m with * the token ring header. */ static void token_input(ifp, m) struct ifnet *ifp; struct mbuf *m; { struct ifqueue *inq; struct llc *l; struct token_header *trh; int s, lan_hdr_len; if ((ifp->if_flags & IFF_UP) == 0) { m_freem(m); return; } trh = mtod(m, struct token_header *); ifp->if_ibytes += m->m_pkthdr.len; if (memcmp(tokenbroadcastaddr, trh->token_dhost, sizeof(tokenbroadcastaddr)) == 0) m->m_flags |= M_BCAST; else if (trh->token_dhost[0] & 1) m->m_flags |= M_MCAST; if (m->m_flags & (M_BCAST|M_MCAST)) ifp->if_imcasts++; /* Skip past the Token Ring header and RIF. */ lan_hdr_len = sizeof(struct token_header); if (trh->token_shost[0] & TOKEN_RI_PRESENT) { struct token_rif *trrif; trrif = TOKEN_RIF(trh); lan_hdr_len += (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8; } m_adj(m, lan_hdr_len); l = mtod(m, struct llc *); switch (l->llc_dsap) { #if defined(INET) || defined(NS) || defined(DECNET) case LLC_SNAP_LSAP: { u_int16_t etype; if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP) goto dropanyway; if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0 || l->llc_snap.org_code[2] != 0) goto dropanyway; etype = ntohs(l->llc_snap.ether_type); m_adj(m, LLC_SNAPFRAMELEN); switch (etype) { #ifdef INET case ETHERTYPE_IP: schednetisr(NETISR_IP); inq = &ipintrq; break; case ETHERTYPE_ARP: schednetisr(NETISR_ARP); inq = &arpintrq; break; #endif #ifdef NS case ETHERTYPE_NS: schednetisr(NETISR_NS); inq = &nsintrq; break; #endif #ifdef DECNET case ETHERTYPE_DECNET: schednetisr(NETISR_DECNET); inq = &decnetintrq; break; #endif default: /* printf("token_input: unknown protocol 0x%x\n", etype); */ ifp->if_noproto++; goto dropanyway; } break; } #endif /* INET || NS || DECNET */ #ifdef ISO case LLC_ISO_LSAP: switch (l->llc_control) { case LLC_UI: /* LLC_UI_P forbidden in class 1 service */ if ((l->llc_dsap == LLC_ISO_LSAP) && (l->llc_ssap == LLC_ISO_LSAP)) { /* LSAP for ISO */ m->m_data += 3; /* XXX */ m->m_len -= 3; /* XXX */ m->m_pkthdr.len -= 3; /* XXX */ M_PREPEND(m, sizeof *trh, M_DONTWAIT); if (m == 0) return; *mtod(m, struct token_header *) = *trh; #if defined(__FreeBSD__) IFDEBUG(D_ETHER) printf("clnp packet"); ENDDEBUG #endif schednetisr(NETISR_ISO); inq = &clnlintrq; break; } goto dropanyway; case LLC_XID: case LLC_XID_P: if(m->m_len < ISO88025_ADDR_LEN) goto dropanyway; l->llc_window = 0; l->llc_fid = 9; l->llc_class = 1; l->llc_dsap = l->llc_ssap = 0; /* Fall through to */ case LLC_TEST: case LLC_TEST_P: { struct sockaddr sa; struct ether_header *eh; int i; u_char c = l->llc_dsap; l->llc_dsap = l->llc_ssap; l->llc_ssap = c; if (m->m_flags & (M_BCAST | M_MCAST)) bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_dhost, ISO88025_ADDR_LEN); sa.sa_family = AF_UNSPEC; sa.sa_len = sizeof(sa); eh = (struct ether_header *)sa.sa_data; for (i = 0; i < ISO88025_ADDR_LEN; i++) { eh->ether_shost[i] = c = trh->token_dhost[i]; eh->ether_dhost[i] = eh->ether_dhost[i] = trh->token_shost[i]; eh->ether_shost[i] = c; } eh->ether_type = 0; ifp->if_output(ifp, m, &sa, NULL); return; } default: m_freem(m); return; } break; #endif /* ISO */ #ifdef LLC case LLC_X25_LSAP: { /* * XXX check for source routing info ? (sizeof(struct sdl_hdr) and * ISO88025_ADDR_LEN) */ M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); if (m == 0) return; if (!sdl_sethdrif(ifp, trh->token_shost, LLC_X25_LSAP, trh->token_dhost, LLC_X25_LSAP, ISO88025_ADDR_LEN, mtod(m, struct sdl_hdr *))) panic("ETHER cons addr failure"); mtod(m, struct sdl_hdr *)->sdlhdr_len = m->m_pkthdr.len - sizeof(struct sdl_hdr); #ifdef LLC_DEBUG printf("llc packet\n"); #endif /* LLC_DEBUG */ schednetisr(NETISR_CCITT); inq = &llcintrq; break; } #endif /* LLC */ default: /* printf("token_input: unknown dsap 0x%x\n", l->llc_dsap); */ ifp->if_noproto++; #if defined(INET) || defined(NS) || defined(DECNET) || defined(ISO) dropanyway: #endif m_freem(m); return; } s = splnet(); if (IF_QFULL(inq)) { IF_DROP(inq); m_freem(m); } else IF_ENQUEUE(inq, m); splx(s); } /* * Perform common duties while attaching to interface list */ void token_ifattach(ifp, lla) struct ifnet *ifp; caddr_t lla; { ifp->if_type = IFT_ISO88025; ifp->if_addrlen = ISO88025_ADDR_LEN; ifp->if_hdrlen = 14; ifp->if_dlt = DLT_IEEE802; ifp->if_mtu = ISO88025_MTU; ifp->if_output = token_output; ifp->if_input = token_input; ifp->if_broadcastaddr = tokenbroadcastaddr; #ifdef IFF_NOTRAILERS ifp->if_flags |= IFF_NOTRAILERS; #endif if_alloc_sadl(ifp); memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); #if NBPFILTER > 0 bpfattach(ifp, DLT_IEEE802, sizeof(struct token_header)); #endif } void token_ifdetach(ifp) struct ifnet *ifp; { #if NBPFILTER > 0 bpfdetach(ifp); #endif #if 0 /* done in if_detach() */ if_free_sadl(ifp); #endif }