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 1.12 2005/02/11 22:25:57 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>
54 #include <net/if_var.h>
55 #include <net/ifq_var.h>
57 #include <net/netisr.h>
58 #include <net/route.h>
59 #include <net/if_dl.h>
60 #include <net/if_types.h>
61 #include <net/if_atm.h>
63 #include <netinet/in.h>
64 #include <netinet/if_atm.h>
65 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
66 #if defined(INET) || defined(INET6)
67 #include <netinet/in_var.h>
70 #include <netproto/natm/natm.h>
73 #ifndef ETHERTYPE_IPV6
74 #define ETHERTYPE_IPV6 0x86dd
77 #define gotoerr(e) { error = (e); goto bad;}
80 * atm_output: ATM output routine
82 * "ifp" = ATM interface to output to
83 * "m0" = the packet to output
84 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
85 * "rt0" = the route to use
86 * returns: error code [0 == ok]
88 * note: special semantic: if (dst == NULL) then we assume "m" already
89 * has an atm_pseudohdr on it and just send it directly.
90 * [for native mode ATM output] if dst is null, then
91 * rt0 must also be NULL.
95 atm_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
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;
106 struct altq_pktattr pktattr;
108 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
112 * if the queueing discipline needs packet classification,
113 * do it before prepending link headers.
115 ifq_classify(&ifp->if_snd, m,
116 (dst != NULL ? dst->sa_family : AF_UNSPEC), &pktattr);
121 if ((rt = rt0) != NULL) {
123 if (!(rt->rt_flags & RTF_UP)) { /* route went down! */
124 if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
127 gotoerr(EHOSTUNREACH);
130 if (rt->rt_flags & RTF_GATEWAY) {
131 if (rt->rt_gwroute == NULL)
133 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == NULL) {
134 rtfree(rt); rt = rt0;
135 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
136 if ((rt = rt->rt_gwroute) == NULL)
137 gotoerr(EHOSTUNREACH);
141 /* XXX: put RTF_REJECT code here if doing ATMARP */
146 * check for non-native ATM traffic (dst != NULL)
149 switch (dst->sa_family) {
150 #if defined(INET) || defined(INET6)
153 if (dst->sa_family == AF_INET6)
154 etype = htons(ETHERTYPE_IPV6);
156 etype = htons(ETHERTYPE_IP);
157 if (!atmresolve(rt, m, dst, &atmdst)) {
159 /* XXX: atmresolve already free'd it */
160 gotoerr(EHOSTUNREACH);
161 /* XXX: put ATMARP stuff here */
162 /* XXX: watch who frees m on failure */
165 #endif /* INET || INET6 */
169 * XXX: bpfwrite. assuming dst contains 12 bytes
170 * (atm pseudo header (4) + LLC/SNAP (8))
172 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
173 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
177 #if defined(__NetBSD__) || defined(__OpenBSD__)
178 printf("%s: can't handle af%d\n", ifp->if_xname,
180 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
181 printf("%s: can't handle af%d\n", ifp->if_xname,
184 gotoerr(EAFNOSUPPORT);
188 * must add atm_pseudohdr to data
191 atm_flags = ATM_PH_FLAGS(&atmdst);
192 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
193 M_PREPEND(m, sz, MB_DONTWAIT);
196 ad = mtod(m, struct atm_pseudohdr *);
198 if (atm_flags & ATM_PH_LLCSNAP) {
199 atmllc = (struct atmllc *)(ad + 1);
200 if (llc_hdr == NULL) {
201 bcopy(ATMLLC_HDR, atmllc->llchdr,
202 sizeof(atmllc->llchdr));
203 ATM_LLC_SETTYPE(atmllc, etype);
204 /* note: already in network order */
207 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
212 * Queue message on interface, and start output if interface
216 error = ifq_enqueue(&ifp->if_snd, m, &pktattr);
221 ifp->if_obytes += m->m_pkthdr.len;
222 if (!(ifp->if_flags & IFF_OACTIVE))
223 (*ifp->if_start)(ifp);
234 * Process a received ATM packet;
235 * the packet is in the mbuf chain m.
238 atm_input(ifp, ah, m, rxhand)
240 struct atm_pseudohdr *ah;
244 u_int16_t etype = ETHERTYPE_IP; /* default */
248 if (!(ifp->if_flags & IFF_UP)) {
252 ifp->if_ibytes += m->m_pkthdr.len;
256 struct natmpcb *npcb = rxhand;
257 s = splimp(); /* in case 2 atm cards @ diff lvls */
258 npcb->npcb_inq++; /* count # in queue */
261 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
263 printf("atm_input: NATM detected but not configured in kernel\n");
269 * handle LLC/SNAP header, if present
271 if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
273 if (m->m_len < sizeof(*alc) &&
274 (m = m_pullup(m, sizeof(*alc))) == NULL)
276 alc = mtod(m, struct atmllc *);
277 if (bcmp(alc, ATMLLC_HDR, 6)) {
278 #if defined(__NetBSD__) || defined(__OpenBSD__)
279 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
280 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
281 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
282 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
283 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
288 etype = ATM_LLC_TYPE(alc);
289 m_adj(m, sizeof(*alc));
309 netisr_dispatch(isr, m);
313 * Perform common duties while attaching to interface list
320 struct sockaddr_dl *sdl;
322 ifp->if_type = IFT_ATM;
325 ifp->if_mtu = ATMMTU;
327 ifp->if_input = atm_input;
329 ifp->if_output = atm_output;
330 ifq_set_maxlen(&ifp->if_snd, 50);
333 #if defined(__NetBSD__) || defined(__OpenBSD__)
334 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != 0;
335 ifa = TAILQ_NEXT(ifa, ifa_list))
336 #elif defined(__DragonFly__) || (defined(__FreeBSD__) && (__FreeBSD__ > 2))
337 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
338 ifa = TAILQ_NEXT(ifa, ifa_link))
339 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
340 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
342 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
343 sdl->sdl_family == AF_LINK) {
344 sdl->sdl_type = IFT_ATM;
345 sdl->sdl_alen = ifp->if_addrlen;
346 #ifdef notyet /* if using ATMARP, store hardware address using the next line */
347 bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);
351 bpfattach(ifp, DLT_ATM_RFC1483, sizeof(struct atmllc));