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.
42 #include "opt_inet6.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/errno.h>
53 #include <net/netisr.h>
54 #include <net/route.h>
55 #include <net/if_dl.h>
56 #include <net/if_types.h>
57 #include <net/if_atm.h>
59 #include <netinet/in.h>
60 #include <netinet/if_atm.h>
61 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
62 #if defined(INET) || defined(INET6)
63 #include <netinet/in_var.h>
66 #include <netnatm/natm.h>
69 #ifndef ETHERTYPE_IPV6
70 #define ETHERTYPE_IPV6 0x86dd
73 #define senderr(e) { error = (e); goto bad;}
76 * atm_output: ATM output routine
78 * "ifp" = ATM interface to output to
79 * "m0" = the packet to output
80 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
81 * "rt0" = the route to use
82 * returns: error code [0 == ok]
84 * note: special semantic: if (dst == NULL) then we assume "m" already
85 * has an atm_pseudohdr on it and just send it directly.
86 * [for native mode ATM output] if dst is null, then
87 * rt0 must also be NULL.
91 atm_output(ifp, m0, dst, rt0)
92 register struct ifnet *ifp;
97 u_int16_t etype = 0; /* if using LLC/SNAP */
99 struct atm_pseudohdr atmdst, *ad;
102 struct atmllc *atmllc;
103 struct atmllc *llc_hdr = NULL;
106 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
112 if ((rt = rt0) != NULL) {
114 if ((rt->rt_flags & RTF_UP) == 0) { /* route went down! */
115 if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
118 senderr(EHOSTUNREACH);
121 if (rt->rt_flags & RTF_GATEWAY) {
122 if (rt->rt_gwroute == 0)
124 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
125 rtfree(rt); rt = rt0;
126 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
127 if ((rt = rt->rt_gwroute) == 0)
128 senderr(EHOSTUNREACH);
132 /* XXX: put RTF_REJECT code here if doing ATMARP */
137 * check for non-native ATM traffic (dst != NULL)
140 switch (dst->sa_family) {
141 #if defined(INET) || defined(INET6)
144 if (dst->sa_family == AF_INET6)
145 etype = htons(ETHERTYPE_IPV6);
147 etype = htons(ETHERTYPE_IP);
148 if (!atmresolve(rt, m, dst, &atmdst)) {
150 /* XXX: atmresolve already free'd it */
151 senderr(EHOSTUNREACH);
152 /* XXX: put ATMARP stuff here */
153 /* XXX: watch who frees m on failure */
156 #endif /* INET || INET6 */
160 * XXX: bpfwrite. assuming dst contains 12 bytes
161 * (atm pseudo header (4) + LLC/SNAP (8))
163 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
164 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
168 #if defined(__NetBSD__) || defined(__OpenBSD__)
169 printf("%s: can't handle af%d\n", ifp->if_xname,
171 #elif defined(__FreeBSD__) || defined(__bsdi__)
172 printf("%s%d: can't handle af%d\n", ifp->if_name,
173 ifp->if_unit, dst->sa_family);
175 senderr(EAFNOSUPPORT);
179 * must add atm_pseudohdr to data
182 atm_flags = ATM_PH_FLAGS(&atmdst);
183 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
184 M_PREPEND(m, sz, M_DONTWAIT);
187 ad = mtod(m, struct atm_pseudohdr *);
189 if (atm_flags & ATM_PH_LLCSNAP) {
190 atmllc = (struct atmllc *)(ad + 1);
191 if (llc_hdr == NULL) {
192 bcopy(ATMLLC_HDR, atmllc->llchdr,
193 sizeof(atmllc->llchdr));
194 ATM_LLC_SETTYPE(atmllc, etype);
195 /* note: already in network order */
198 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
203 * Queue message on interface, and start output if interface
206 if (! IF_HANDOFF(&ifp->if_snd, m, ifp))
217 * Process a received ATM packet;
218 * the packet is in the mbuf chain m.
221 atm_input(ifp, ah, m, rxhand)
223 register struct atm_pseudohdr *ah;
227 register struct ifqueue *inq;
228 u_int16_t etype = ETHERTYPE_IP; /* default */
231 if ((ifp->if_flags & IFF_UP) == 0) {
235 ifp->if_ibytes += m->m_pkthdr.len;
239 struct natmpcb *npcb = rxhand;
240 s = splimp(); /* in case 2 atm cards @ diff lvls */
241 npcb->npcb_inq++; /* count # in queue */
243 schednetisr(NETISR_NATM);
245 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
247 printf("atm_input: NATM detected but not configured in kernel\n");
253 * handle LLC/SNAP header, if present
255 if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
257 if (m->m_len < sizeof(*alc) &&
258 (m = m_pullup(m, sizeof(*alc))) == 0)
260 alc = mtod(m, struct atmllc *);
261 if (bcmp(alc, ATMLLC_HDR, 6)) {
262 #if defined(__NetBSD__) || defined(__OpenBSD__)
263 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
264 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
265 #elif defined(__FreeBSD__) || defined(__bsdi__)
266 printf("%s%d: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
267 ifp->if_name, ifp->if_unit, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
272 etype = ATM_LLC_TYPE(alc);
273 m_adj(m, sizeof(*alc));
279 schednetisr(NETISR_IP);
285 schednetisr(NETISR_IPV6);
295 (void) IF_HANDOFF(inq, m, NULL);
299 * Perform common duties while attaching to interface list
303 register struct ifnet *ifp;
305 register struct ifaddr *ifa;
306 register struct sockaddr_dl *sdl;
308 ifp->if_type = IFT_ATM;
311 ifp->if_mtu = ATMMTU;
312 ifp->if_output = atm_output;
313 ifp->if_snd.ifq_maxlen = 50; /* dummy */
315 #if defined(__NetBSD__) || defined(__OpenBSD__)
316 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
317 #elif defined(__FreeBSD__) && (__FreeBSD__ > 2)
318 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
319 ifa = TAILQ_NEXT(ifa, ifa_link))
320 #elif defined(__FreeBSD__) || defined(__bsdi__)
321 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
323 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
324 sdl->sdl_family == AF_LINK) {
325 sdl->sdl_type = IFT_ATM;
326 sdl->sdl_alen = ifp->if_addrlen;
327 #ifdef notyet /* if using ATMARP, store hardware address using the next line */
328 bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);