1 /* $NetBSD: if_atmsubr.c,v 1.10 1997/03/11 23:19:51 chuck Exp $ */
5 * Copyright (c) 1996 Charles D. Cranor and Washington University.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles D. Cranor and
19 * Washington University.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 * $FreeBSD: src/sys/net/if_atmsubr.c,v 1.10.2.1 2001/03/06 00:29:26 obrien Exp $
35 * $DragonFly: src/sys/net/if_atmsubr.c,v 1.20 2008/06/05 18:06:32 swildner Exp $
43 #include "opt_inet6.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
49 #include <sys/socket.h>
50 #include <sys/sockio.h>
51 #include <sys/errno.h>
52 #include <sys/serialize.h>
54 #include <sys/thread2.h>
57 #include <net/if_var.h>
58 #include <net/ifq_var.h>
60 #include <net/netisr.h>
61 #include <net/route.h>
62 #include <net/if_dl.h>
63 #include <net/if_types.h>
64 #include <net/if_atm.h>
66 #include <netinet/in.h>
67 #include <netinet/if_atm.h>
68 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
69 #if defined(INET) || defined(INET6)
70 #include <netinet/in_var.h>
73 #include <netproto/natm/natm.h>
76 #ifndef ETHERTYPE_IPV6
77 #define ETHERTYPE_IPV6 0x86dd
80 #define gotoerr(e) { error = (e); goto bad;}
83 * atm_output: ATM output routine
85 * "ifp" = ATM interface to output to
86 * "m0" = the packet to output
87 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
88 * "rt0" = the route to use
89 * returns: error code [0 == ok]
91 * note: special semantic: if (dst == NULL) then we assume "m" already
92 * has an atm_pseudohdr on it and just send it directly.
93 * [for native mode ATM output] if dst is null, then
94 * rt0 must also be NULL.
98 atm_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
101 u_int16_t etype = 0; /* if using LLC/SNAP */
103 struct atm_pseudohdr atmdst, *ad;
106 struct atmllc *atmllc;
107 struct atmllc *llc_hdr = NULL;
109 struct altq_pktattr pktattr;
111 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
115 * if the queueing discipline needs packet classification,
116 * do it before prepending link headers.
118 ifq_classify(&ifp->if_snd, m,
119 (dst != NULL ? dst->sa_family : AF_UNSPEC), &pktattr);
124 if ((rt = rt0) != NULL) {
126 if (!(rt->rt_flags & RTF_UP)) { /* route went down! */
127 if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
130 gotoerr(EHOSTUNREACH);
133 if (rt->rt_flags & RTF_GATEWAY) {
134 if (rt->rt_gwroute == NULL)
136 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
137 rtfree(rt); rt = rt0;
138 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
139 if ((rt = rt->rt_gwroute) == NULL)
140 gotoerr(EHOSTUNREACH);
144 /* XXX: put RTF_REJECT code here if doing ATMARP */
149 * check for non-native ATM traffic (dst != NULL)
152 switch (dst->sa_family) {
153 #if defined(INET) || defined(INET6)
156 if (dst->sa_family == AF_INET6)
157 etype = htons(ETHERTYPE_IPV6);
159 etype = htons(ETHERTYPE_IP);
160 if (!atmresolve(rt, m, dst, &atmdst)) {
162 /* XXX: atmresolve already free'd it */
163 gotoerr(EHOSTUNREACH);
164 /* XXX: put ATMARP stuff here */
165 /* XXX: watch who frees m on failure */
168 #endif /* INET || INET6 */
172 * XXX: bpfwrite. assuming dst contains 12 bytes
173 * (atm pseudo header (4) + LLC/SNAP (8))
175 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
176 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
180 #if defined(__NetBSD__) || defined(__OpenBSD__)
181 kprintf("%s: can't handle af%d\n", ifp->if_xname,
183 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
184 kprintf("%s: can't handle af%d\n", ifp->if_xname,
187 gotoerr(EAFNOSUPPORT);
191 * must add atm_pseudohdr to data
194 atm_flags = ATM_PH_FLAGS(&atmdst);
195 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
196 M_PREPEND(m, sz, MB_DONTWAIT);
199 ad = mtod(m, struct atm_pseudohdr *);
201 if (atm_flags & ATM_PH_LLCSNAP) {
202 atmllc = (struct atmllc *)(ad + 1);
203 if (llc_hdr == NULL) {
204 bcopy(ATMLLC_HDR, atmllc->llchdr,
205 sizeof(atmllc->llchdr));
206 ATM_LLC_SETTYPE(atmllc, etype);
207 /* note: already in network order */
210 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
215 * Dispatch message to the interface.
217 lwkt_serialize_enter(ifp->if_serializer);
218 error = ifq_handoff(ifp, m, &pktattr);
219 lwkt_serialize_exit(ifp->if_serializer);
229 * Process a received ATM packet;
230 * the packet is in the mbuf chain m.
233 atm_input(struct ifnet *ifp, struct atm_pseudohdr *ah, struct mbuf *m,
236 u_int16_t etype = ETHERTYPE_IP; /* default */
239 ASSERT_SERIALIZED(ifp->if_serializer);
241 if (!(ifp->if_flags & IFF_UP)) {
245 ifp->if_ibytes += m->m_pkthdr.len;
249 struct natmpcb *npcb = rxhand;
250 crit_enter(); /* in case 2 atm cards @ diff lvls */
251 npcb->npcb_inq++; /* count # in queue */
254 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
256 kprintf("atm_input: NATM detected but not configured in kernel\n");
262 * handle LLC/SNAP header, if present
264 if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
266 if (m->m_len < sizeof(*alc) &&
267 (m = m_pullup(m, sizeof(*alc))) == NULL)
269 alc = mtod(m, struct atmllc *);
270 if (bcmp(alc, ATMLLC_HDR, 6)) {
271 #if defined(__NetBSD__) || defined(__OpenBSD__)
272 kprintf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
273 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
274 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
275 kprintf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
276 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
281 etype = ATM_LLC_TYPE(alc);
282 m_adj(m, sizeof(*alc));
302 netisr_dispatch(isr, m);
306 * Perform common duties while attaching to interface list
309 atm_ifattach(struct ifnet *ifp, lwkt_serialize_t serializer)
311 struct ifaddr_container *ifac;
312 struct sockaddr_dl *sdl;
314 ifp->if_type = IFT_ATM;
317 ifp->if_mtu = ATMMTU;
319 ifp->if_input = atm_input;
321 ifp->if_output = atm_output;
322 ifq_set_maxlen(&ifp->if_snd, 50);
323 if_attach(ifp, serializer);
325 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
326 struct ifaddr *ifa = ifac->ifa;
328 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
329 sdl->sdl_family == AF_LINK) {
330 sdl->sdl_type = IFT_ATM;
331 sdl->sdl_alen = ifp->if_addrlen;
332 #ifdef notyet /* if using ATMARP, store hardware address using the next line */
333 bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);
338 bpfattach(ifp, DLT_ATM_RFC1483, sizeof(struct atmllc));