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 1.14 2005/06/15 19:29:30 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/thread2.h>
52 #include <sys/errno.h>
55 #include <net/if_var.h>
56 #include <net/ifq_var.h>
58 #include <net/netisr.h>
59 #include <net/route.h>
60 #include <net/if_dl.h>
61 #include <net/if_types.h>
62 #include <net/if_atm.h>
64 #include <netinet/in.h>
65 #include <netinet/if_atm.h>
66 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
67 #if defined(INET) || defined(INET6)
68 #include <netinet/in_var.h>
71 #include <netproto/natm/natm.h>
74 #ifndef ETHERTYPE_IPV6
75 #define ETHERTYPE_IPV6 0x86dd
78 #define gotoerr(e) { error = (e); goto bad;}
81 * atm_output: ATM output routine
83 * "ifp" = ATM interface to output to
84 * "m0" = the packet to output
85 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
86 * "rt0" = the route to use
87 * returns: error code [0 == ok]
89 * note: special semantic: if (dst == NULL) then we assume "m" already
90 * has an atm_pseudohdr on it and just send it directly.
91 * [for native mode ATM output] if dst is null, then
92 * rt0 must also be NULL.
96 atm_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
99 u_int16_t etype = 0; /* if using LLC/SNAP */
101 struct atm_pseudohdr atmdst, *ad;
104 struct atmllc *atmllc;
105 struct atmllc *llc_hdr = NULL;
107 struct altq_pktattr pktattr;
109 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
113 * if the queueing discipline needs packet classification,
114 * do it before prepending link headers.
116 ifq_classify(&ifp->if_snd, m,
117 (dst != NULL ? dst->sa_family : AF_UNSPEC), &pktattr);
122 if ((rt = rt0) != NULL) {
124 if (!(rt->rt_flags & RTF_UP)) { /* route went down! */
125 if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
128 gotoerr(EHOSTUNREACH);
131 if (rt->rt_flags & RTF_GATEWAY) {
132 if (rt->rt_gwroute == NULL)
134 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == NULL) {
135 rtfree(rt); rt = rt0;
136 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
137 if ((rt = rt->rt_gwroute) == NULL)
138 gotoerr(EHOSTUNREACH);
142 /* XXX: put RTF_REJECT code here if doing ATMARP */
147 * check for non-native ATM traffic (dst != NULL)
150 switch (dst->sa_family) {
151 #if defined(INET) || defined(INET6)
154 if (dst->sa_family == AF_INET6)
155 etype = htons(ETHERTYPE_IPV6);
157 etype = htons(ETHERTYPE_IP);
158 if (!atmresolve(rt, m, dst, &atmdst)) {
160 /* XXX: atmresolve already free'd it */
161 gotoerr(EHOSTUNREACH);
162 /* XXX: put ATMARP stuff here */
163 /* XXX: watch who frees m on failure */
166 #endif /* INET || INET6 */
170 * XXX: bpfwrite. assuming dst contains 12 bytes
171 * (atm pseudo header (4) + LLC/SNAP (8))
173 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
174 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
178 #if defined(__NetBSD__) || defined(__OpenBSD__)
179 printf("%s: can't handle af%d\n", ifp->if_xname,
181 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
182 printf("%s: can't handle af%d\n", ifp->if_xname,
185 gotoerr(EAFNOSUPPORT);
189 * must add atm_pseudohdr to data
192 atm_flags = ATM_PH_FLAGS(&atmdst);
193 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
194 M_PREPEND(m, sz, MB_DONTWAIT);
197 ad = mtod(m, struct atm_pseudohdr *);
199 if (atm_flags & ATM_PH_LLCSNAP) {
200 atmllc = (struct atmllc *)(ad + 1);
201 if (llc_hdr == NULL) {
202 bcopy(ATMLLC_HDR, atmllc->llchdr,
203 sizeof(atmllc->llchdr));
204 ATM_LLC_SETTYPE(atmllc, etype);
205 /* note: already in network order */
208 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
213 * Dispatch message to the interface.
215 return (ifq_handoff(ifp, m, &pktattr));
224 * Process a received ATM packet;
225 * the packet is in the mbuf chain m.
228 atm_input(ifp, ah, m, rxhand)
230 struct atm_pseudohdr *ah;
234 u_int16_t etype = ETHERTYPE_IP; /* default */
237 if (!(ifp->if_flags & IFF_UP)) {
241 ifp->if_ibytes += m->m_pkthdr.len;
245 struct natmpcb *npcb = rxhand;
246 crit_enter(); /* in case 2 atm cards @ diff lvls */
247 npcb->npcb_inq++; /* count # in queue */
250 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
252 printf("atm_input: NATM detected but not configured in kernel\n");
258 * handle LLC/SNAP header, if present
260 if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
262 if (m->m_len < sizeof(*alc) &&
263 (m = m_pullup(m, sizeof(*alc))) == NULL)
265 alc = mtod(m, struct atmllc *);
266 if (bcmp(alc, ATMLLC_HDR, 6)) {
267 #if defined(__NetBSD__) || defined(__OpenBSD__)
268 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
269 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
270 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
271 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
272 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
277 etype = ATM_LLC_TYPE(alc);
278 m_adj(m, sizeof(*alc));
298 netisr_dispatch(isr, m);
302 * Perform common duties while attaching to interface list
309 struct sockaddr_dl *sdl;
311 ifp->if_type = IFT_ATM;
314 ifp->if_mtu = ATMMTU;
316 ifp->if_input = atm_input;
318 ifp->if_output = atm_output;
319 ifq_set_maxlen(&ifp->if_snd, 50);
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(__DragonFly__) || (defined(__FreeBSD__) && (__FreeBSD__ > 2))
326 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
327 ifa = TAILQ_NEXT(ifa, ifa_link))
328 #elif defined(__DragonFly__) || 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);
340 bpfattach(ifp, DLT_ATM_RFC1483, sizeof(struct atmllc));