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 1.10 2004/07/23 07:16:30 joerg 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>
55 #include <net/netisr.h>
56 #include <net/route.h>
57 #include <net/if_dl.h>
58 #include <net/if_types.h>
59 #include <net/if_atm.h>
61 #include <netinet/in.h>
62 #include <netinet/if_atm.h>
63 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
64 #if defined(INET) || defined(INET6)
65 #include <netinet/in_var.h>
68 #include <netproto/natm/natm.h>
71 #ifndef ETHERTYPE_IPV6
72 #define ETHERTYPE_IPV6 0x86dd
75 #define senderr(e) { error = (e); goto bad;}
78 * atm_output: ATM output routine
80 * "ifp" = ATM interface to output to
81 * "m0" = the packet to output
82 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
83 * "rt0" = the route to use
84 * returns: error code [0 == ok]
86 * note: special semantic: if (dst == NULL) then we assume "m" already
87 * has an atm_pseudohdr on it and just send it directly.
88 * [for native mode ATM output] if dst is null, then
89 * rt0 must also be NULL.
93 atm_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
96 u_int16_t etype = 0; /* if using LLC/SNAP */
98 struct atm_pseudohdr atmdst, *ad;
101 struct atmllc *atmllc;
102 struct atmllc *llc_hdr = NULL;
105 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
111 if ((rt = rt0) != NULL) {
113 if ((rt->rt_flags & RTF_UP) == 0) { /* route went down! */
114 if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
117 senderr(EHOSTUNREACH);
120 if (rt->rt_flags & RTF_GATEWAY) {
121 if (rt->rt_gwroute == 0)
123 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
124 rtfree(rt); rt = rt0;
125 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
126 if ((rt = rt->rt_gwroute) == 0)
127 senderr(EHOSTUNREACH);
131 /* XXX: put RTF_REJECT code here if doing ATMARP */
136 * check for non-native ATM traffic (dst != NULL)
139 switch (dst->sa_family) {
140 #if defined(INET) || defined(INET6)
143 if (dst->sa_family == AF_INET6)
144 etype = htons(ETHERTYPE_IPV6);
146 etype = htons(ETHERTYPE_IP);
147 if (!atmresolve(rt, m, dst, &atmdst)) {
149 /* XXX: atmresolve already free'd it */
150 senderr(EHOSTUNREACH);
151 /* XXX: put ATMARP stuff here */
152 /* XXX: watch who frees m on failure */
155 #endif /* INET || INET6 */
159 * XXX: bpfwrite. assuming dst contains 12 bytes
160 * (atm pseudo header (4) + LLC/SNAP (8))
162 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
163 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
167 #if defined(__NetBSD__) || defined(__OpenBSD__)
168 printf("%s: can't handle af%d\n", ifp->if_xname,
170 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
171 printf("%s: can't handle af%d\n", ifp->if_xname,
174 senderr(EAFNOSUPPORT);
178 * must add atm_pseudohdr to data
181 atm_flags = ATM_PH_FLAGS(&atmdst);
182 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
183 M_PREPEND(m, sz, MB_DONTWAIT);
186 ad = mtod(m, struct atm_pseudohdr *);
188 if (atm_flags & ATM_PH_LLCSNAP) {
189 atmllc = (struct atmllc *)(ad + 1);
190 if (llc_hdr == NULL) {
191 bcopy(ATMLLC_HDR, atmllc->llchdr,
192 sizeof(atmllc->llchdr));
193 ATM_LLC_SETTYPE(atmllc, etype);
194 /* note: already in network order */
197 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
202 * Queue message on interface, and start output if interface
206 if (IF_QFULL(&ifp->if_snd)) {
207 IF_DROP(&ifp->if_snd);
211 ifp->if_obytes += m->m_pkthdr.len;
212 IF_ENQUEUE(&ifp->if_snd, m);
213 if ((ifp->if_flags & IFF_OACTIVE) == 0)
214 (*ifp->if_start)(ifp);
225 * Process a received ATM packet;
226 * the packet is in the mbuf chain m.
229 atm_input(ifp, ah, m, rxhand)
231 struct atm_pseudohdr *ah;
235 u_int16_t etype = ETHERTYPE_IP; /* default */
239 if ((ifp->if_flags & IFF_UP) == 0) {
243 ifp->if_ibytes += m->m_pkthdr.len;
247 struct natmpcb *npcb = rxhand;
248 s = splimp(); /* in case 2 atm cards @ diff lvls */
249 npcb->npcb_inq++; /* count # in queue */
252 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
254 printf("atm_input: NATM detected but not configured in kernel\n");
260 * handle LLC/SNAP header, if present
262 if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
264 if (m->m_len < sizeof(*alc) &&
265 (m = m_pullup(m, sizeof(*alc))) == 0)
267 alc = mtod(m, struct atmllc *);
268 if (bcmp(alc, ATMLLC_HDR, 6)) {
269 #if defined(__NetBSD__) || defined(__OpenBSD__)
270 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
271 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
272 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
273 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
274 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
279 etype = ATM_LLC_TYPE(alc);
280 m_adj(m, sizeof(*alc));
300 netisr_dispatch(isr, m);
304 * Perform common duties while attaching to interface list
311 struct sockaddr_dl *sdl;
313 ifp->if_type = IFT_ATM;
316 ifp->if_mtu = ATMMTU;
318 ifp->if_input = atm_input;
320 ifp->if_output = atm_output;
321 ifp->if_snd.ifq_maxlen = 50; /* dummy */
324 #if defined(__NetBSD__) || defined(__OpenBSD__)
325 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != 0;
326 ifa = TAILQ_NEXT(ifa, ifa_list))
327 #elif defined(__DragonFly__) || (defined(__FreeBSD__) && (__FreeBSD__ > 2))
328 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
329 ifa = TAILQ_NEXT(ifa, ifa_link))
330 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
331 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
333 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
334 sdl->sdl_family == AF_LINK) {
335 sdl->sdl_type = IFT_ATM;
336 sdl->sdl_alen = ifp->if_addrlen;
337 #ifdef notyet /* if using ATMARP, store hardware address using the next line */
338 bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);
342 bpfattach(ifp, DLT_ATM_RFC1483, sizeof(struct atmllc));