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 1.6 2003/09/16 05:03:13 hsu 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>
54 #include <net/netisr.h>
55 #include <net/route.h>
56 #include <net/if_dl.h>
57 #include <net/if_types.h>
58 #include <net/if_atm.h>
60 #include <netinet/in.h>
61 #include <netinet/if_atm.h>
62 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
63 #if defined(INET) || defined(INET6)
64 #include <netinet/in_var.h>
67 #include <netproto/natm/natm.h>
70 #ifndef ETHERTYPE_IPV6
71 #define ETHERTYPE_IPV6 0x86dd
74 #define senderr(e) { error = (e); goto bad;}
77 * atm_output: ATM output routine
79 * "ifp" = ATM interface to output to
80 * "m0" = the packet to output
81 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
82 * "rt0" = the route to use
83 * returns: error code [0 == ok]
85 * note: special semantic: if (dst == NULL) then we assume "m" already
86 * has an atm_pseudohdr on it and just send it directly.
87 * [for native mode ATM output] if dst is null, then
88 * rt0 must also be NULL.
92 atm_output(ifp, m0, dst, rt0)
98 u_int16_t etype = 0; /* if using LLC/SNAP */
100 struct atm_pseudohdr atmdst, *ad;
103 struct atmllc *atmllc;
104 struct atmllc *llc_hdr = NULL;
107 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
113 if ((rt = rt0) != NULL) {
115 if ((rt->rt_flags & RTF_UP) == 0) { /* route went down! */
116 if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
119 senderr(EHOSTUNREACH);
122 if (rt->rt_flags & RTF_GATEWAY) {
123 if (rt->rt_gwroute == 0)
125 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
126 rtfree(rt); rt = rt0;
127 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
128 if ((rt = rt->rt_gwroute) == 0)
129 senderr(EHOSTUNREACH);
133 /* XXX: put RTF_REJECT code here if doing ATMARP */
138 * check for non-native ATM traffic (dst != NULL)
141 switch (dst->sa_family) {
142 #if defined(INET) || defined(INET6)
145 if (dst->sa_family == AF_INET6)
146 etype = htons(ETHERTYPE_IPV6);
148 etype = htons(ETHERTYPE_IP);
149 if (!atmresolve(rt, m, dst, &atmdst)) {
151 /* XXX: atmresolve already free'd it */
152 senderr(EHOSTUNREACH);
153 /* XXX: put ATMARP stuff here */
154 /* XXX: watch who frees m on failure */
157 #endif /* INET || INET6 */
161 * XXX: bpfwrite. assuming dst contains 12 bytes
162 * (atm pseudo header (4) + LLC/SNAP (8))
164 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
165 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
169 #if defined(__NetBSD__) || defined(__OpenBSD__)
170 printf("%s: can't handle af%d\n", ifp->if_xname,
172 #elif defined(__FreeBSD__) || defined(__bsdi__)
173 printf("%s%d: can't handle af%d\n", ifp->if_name,
174 ifp->if_unit, dst->sa_family);
176 senderr(EAFNOSUPPORT);
180 * must add atm_pseudohdr to data
183 atm_flags = ATM_PH_FLAGS(&atmdst);
184 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
185 M_PREPEND(m, sz, M_DONTWAIT);
188 ad = mtod(m, struct atm_pseudohdr *);
190 if (atm_flags & ATM_PH_LLCSNAP) {
191 atmllc = (struct atmllc *)(ad + 1);
192 if (llc_hdr == NULL) {
193 bcopy(ATMLLC_HDR, atmllc->llchdr,
194 sizeof(atmllc->llchdr));
195 ATM_LLC_SETTYPE(atmllc, etype);
196 /* note: already in network order */
199 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
204 * Queue message on interface, and start output if interface
208 if (IF_QFULL(&ifp->if_snd)) {
209 IF_DROP(&ifp->if_snd);
213 ifp->if_obytes += m->m_pkthdr.len;
214 IF_ENQUEUE(&ifp->if_snd, m);
215 if ((ifp->if_flags & IFF_OACTIVE) == 0)
216 (*ifp->if_start)(ifp);
227 * Process a received ATM packet;
228 * the packet is in the mbuf chain m.
231 atm_input(ifp, ah, m, rxhand)
233 struct atm_pseudohdr *ah;
237 u_int16_t etype = ETHERTYPE_IP; /* default */
241 if ((ifp->if_flags & IFF_UP) == 0) {
245 ifp->if_ibytes += m->m_pkthdr.len;
249 struct natmpcb *npcb = rxhand;
250 s = splimp(); /* in case 2 atm cards @ diff lvls */
251 npcb->npcb_inq++; /* count # in queue */
254 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
256 printf("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))) == 0)
269 alc = mtod(m, struct atmllc *);
270 if (bcmp(alc, ATMLLC_HDR, 6)) {
271 #if defined(__NetBSD__) || defined(__OpenBSD__)
272 printf("%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(__FreeBSD__) || defined(__bsdi__)
275 printf("%s%d: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
276 ifp->if_name, ifp->if_unit, 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
313 struct sockaddr_dl *sdl;
315 ifp->if_type = IFT_ATM;
318 ifp->if_mtu = ATMMTU;
319 ifp->if_output = atm_output;
320 ifp->if_snd.ifq_maxlen = 50; /* dummy */
322 #if defined(__NetBSD__) || defined(__OpenBSD__)
323 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != 0;
324 ifa = TAILQ_NEXT(ifa, ifa_list))
325 #elif defined(__FreeBSD__) && (__FreeBSD__ > 2)
326 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
327 ifa = TAILQ_NEXT(ifa, ifa_link))
328 #elif defined(__FreeBSD__) || defined(__bsdi__)
329 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
331 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
332 sdl->sdl_family == AF_LINK) {
333 sdl->sdl_type = IFT_ATM;
334 sdl->sdl_alen = ifp->if_addrlen;
335 #ifdef notyet /* if using ATMARP, store hardware address using the next line */
336 bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);