1/* $NetBSD: if_atmsubr.c,v 1.10 1997/03/11 23:19:51 chuck Exp $ */
2
3/*
4 *
5 * Copyright (c) 1996 Charles D. Cranor and Washington University.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
22 *
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.
33 *
|
34 * $FreeBSD: head/sys/net/if_atmsubr.c 111774 2003-03-03 00:21:52Z mdodd $
|
| 34 * $FreeBSD: head/sys/net/if_atmsubr.c 111888 2003-03-04 23:19:55Z jlemon $ |
35 */
36
37/*
38 * if_atmsubr.c
39 */
40
41#include "opt_inet.h"
42#include "opt_inet6.h"
43#include "opt_mac.h"
44#include "opt_natm.h"
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/mac.h>
49#include <sys/mbuf.h>
50#include <sys/socket.h>
51#include <sys/sockio.h>
52#include <sys/errno.h>
53
54#include <net/if.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>
60
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>
66#endif
67#ifdef NATM
68#include <netnatm/natm.h>
69#endif
70
71#ifndef ETHERTYPE_IPV6
72#define ETHERTYPE_IPV6 0x86dd
73#endif
74
75#define senderr(e) { error = (e); goto bad;}
76
77/*
78 * atm_output: ATM output routine
79 * inputs:
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]
85 *
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.
90 */
91
92int
93atm_output(ifp, m0, dst, rt0)
94 struct ifnet *ifp;
95 struct mbuf *m0;
96 struct sockaddr *dst;
97 struct rtentry *rt0;
98{
99 u_int16_t etype = 0; /* if using LLC/SNAP */
100 int error = 0, sz;
101 struct atm_pseudohdr atmdst, *ad;
102 struct mbuf *m = m0;
103 struct rtentry *rt;
104 struct atmllc *atmllc;
105 struct atmllc *llc_hdr = NULL;
106 u_int32_t atm_flags;
107
108#ifdef MAC
109 error = mac_check_ifnet_transmit(ifp, m);
110 if (error)
111 senderr(error);
112#endif
113
114 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
115 senderr(ENETDOWN);
116
117 /*
118 * check route
119 */
120 error = rt_check(&rt, &rt0, dst);
121 if (error)
122 goto bad;
123
124 /*
125 * check for non-native ATM traffic (dst != NULL)
126 */
127 if (dst) {
128 switch (dst->sa_family) {
129#if defined(INET) || defined(INET6)
130 case AF_INET:
131 case AF_INET6:
132 if (dst->sa_family == AF_INET6)
133 etype = htons(ETHERTYPE_IPV6);
134 else
135 etype = htons(ETHERTYPE_IP);
136 if (!atmresolve(rt, m, dst, &atmdst)) {
137 m = NULL;
138 /* XXX: atmresolve already free'd it */
139 senderr(EHOSTUNREACH);
140 /* XXX: put ATMARP stuff here */
141 /* XXX: watch who frees m on failure */
142 }
143 break;
144#endif /* INET || INET6 */
145
146 case AF_UNSPEC:
147 /*
148 * XXX: bpfwrite. assuming dst contains 12 bytes
149 * (atm pseudo header (4) + LLC/SNAP (8))
150 */
151 bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
152 llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
153 break;
154
155 default:
156#if defined(__NetBSD__) || defined(__OpenBSD__)
157 printf("%s: can't handle af%d\n", ifp->if_xname,
158 dst->sa_family);
159#elif defined(__FreeBSD__) || defined(__bsdi__)
160 printf("%s%d: can't handle af%d\n", ifp->if_name,
161 ifp->if_unit, dst->sa_family);
162#endif
163 senderr(EAFNOSUPPORT);
164 }
165
166 /*
167 * must add atm_pseudohdr to data
168 */
169 sz = sizeof(atmdst);
170 atm_flags = ATM_PH_FLAGS(&atmdst);
171 if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
172 M_PREPEND(m, sz, M_DONTWAIT);
173 if (m == 0)
174 senderr(ENOBUFS);
175 ad = mtod(m, struct atm_pseudohdr *);
176 *ad = atmdst;
177 if (atm_flags & ATM_PH_LLCSNAP) {
178 atmllc = (struct atmllc *)(ad + 1);
179 if (llc_hdr == NULL) {
180 bcopy(ATMLLC_HDR, atmllc->llchdr,
181 sizeof(atmllc->llchdr));
182 ATM_LLC_SETTYPE(atmllc, etype);
183 /* note: already in network order */
184 }
185 else
186 bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
187 }
188 }
189
190 /*
191 * Queue message on interface, and start output if interface
192 * not yet active.
193 */
194 if (! IF_HANDOFF(&ifp->if_snd, m, ifp))
195 return (ENOBUFS);
196 return (error);
197
198bad:
199 if (m)
200 m_freem(m);
201 return (error);
202}
203
204/*
205 * Process a received ATM packet;
206 * the packet is in the mbuf chain m.
207 */
208void
209atm_input(ifp, ah, m, rxhand)
210 struct ifnet *ifp;
211 struct atm_pseudohdr *ah;
212 struct mbuf *m;
213 void *rxhand;
214{
|
215 struct ifqueue *inq;
|
| 215 int isr; |
216 u_int16_t etype = ETHERTYPE_IP; /* default */
217 int s;
218
219 if ((ifp->if_flags & IFF_UP) == 0) {
220 m_freem(m);
221 return;
222 }
223#ifdef MAC
224 mac_create_mbuf_from_ifnet(ifp, m);
225#endif
226 ifp->if_ibytes += m->m_pkthdr.len;
227
228 if (rxhand) {
229#ifdef NATM
230 struct natmpcb *npcb = rxhand;
231 s = splimp(); /* in case 2 atm cards @ diff lvls */
232 npcb->npcb_inq++; /* count # in queue */
233 splx(s);
|
234 schednetisr(NETISR_NATM);
235 inq = &natmintrq;
|
| 234 isr = NETISR_NATM; |
235 m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
236#else
237 printf("atm_input: NATM detected but not configured in kernel\n");
238 m_freem(m);
239 return;
240#endif
241 } else {
242 /*
243 * handle LLC/SNAP header, if present
244 */
245 if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
246 struct atmllc *alc;
247 if (m->m_len < sizeof(*alc) &&
248 (m = m_pullup(m, sizeof(*alc))) == 0)
249 return; /* failed */
250 alc = mtod(m, struct atmllc *);
251 if (bcmp(alc, ATMLLC_HDR, 6)) {
252#if defined(__NetBSD__) || defined(__OpenBSD__)
253 printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
254 ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
255#elif defined(__FreeBSD__) || defined(__bsdi__)
256 printf("%s%d: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
257 ifp->if_name, ifp->if_unit, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
258#endif
259 m_freem(m);
260 return;
261 }
262 etype = ATM_LLC_TYPE(alc);
263 m_adj(m, sizeof(*alc));
264 }
265
266 switch (etype) {
267#ifdef INET
268 case ETHERTYPE_IP:
|
270 schednetisr(NETISR_IP);
271 inq = &ipintrq;
|
| 269 isr = NETISR_IP; |
270 break;
271#endif
272#ifdef INET6
273 case ETHERTYPE_IPV6:
|
276 schednetisr(NETISR_IPV6);
277 inq = &ip6intrq;
|
| 274 isr = NETISR_IPV6; |
275 break;
276#endif
277 default:
278 m_freem(m);
279 return;
280 }
281 }
|
285
286 (void) IF_HANDOFF(inq, m, NULL);
|
| 282 netisr_dispatch(isr, m); |
283}
284
285/*
286 * Perform common duties while attaching to interface list
287 */
288void
289atm_ifattach(ifp)
290 struct ifnet *ifp;
291{
292 struct ifaddr *ifa;
293 struct sockaddr_dl *sdl;
294
295 ifp->if_type = IFT_ATM;
296 ifp->if_addrlen = 0;
297 ifp->if_hdrlen = 0;
298 ifp->if_mtu = ATMMTU;
299 ifp->if_output = atm_output;
300#if 0
301 ifp->if_input = atm_input;
302#endif
303 ifp->if_snd.ifq_maxlen = 50; /* dummy */
304
305#if defined(__NetBSD__) || defined(__OpenBSD__)
306 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
307#elif defined(__FreeBSD__) && (__FreeBSD__ > 2)
308 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
309 ifa = TAILQ_NEXT(ifa, ifa_link))
310#elif defined(__FreeBSD__) || defined(__bsdi__)
311 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
312#endif
313 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
314 sdl->sdl_family == AF_LINK) {
315 sdl->sdl_type = IFT_ATM;
316 sdl->sdl_alen = ifp->if_addrlen;
317#ifdef notyet /* if using ATMARP, store hardware address using the next line */
318 bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);
319#endif
320 break;
321 }
322
323}
|