3
4/*-
5 * Copyright (c) 1994, 1995 Ignatios Souvatzis
6 * Copyright (c) 1982, 1989, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: NetBSD: if_ethersubr.c,v 1.9 1994/06/29 06:36:11 cgd Exp
38 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
39 *
40 */
41#include "opt_inet.h"
42#include "opt_inet6.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/kernel.h>
47#include <sys/module.h>
48#include <sys/malloc.h>
49#include <sys/mbuf.h>
50#include <sys/protosw.h>
51#include <sys/socket.h>
52#include <sys/sockio.h>
53#include <sys/errno.h>
54#include <sys/syslog.h>
55
56#include <machine/cpu.h>
57
58#include <net/if.h>
59#include <net/if_var.h>
60#include <net/netisr.h>
61#include <net/route.h>
62#include <net/if_dl.h>
63#include <net/if_types.h>
64#include <net/if_arc.h>
65#include <net/if_arp.h>
66#include <net/bpf.h>
67#include <net/if_llatbl.h>
68
69#if defined(INET) || defined(INET6)
70#include <netinet/in.h>
71#include <netinet/in_var.h>
72#include <netinet/if_ether.h>
73#endif
74
75#ifdef INET6
76#include <netinet6/nd6.h>
77#endif
78
79#define ARCNET_ALLOW_BROKEN_ARP
80
81static struct mbuf *arc_defrag(struct ifnet *, struct mbuf *);
82static int arc_resolvemulti(struct ifnet *, struct sockaddr **,
83 struct sockaddr *);
84
85u_int8_t arcbroadcastaddr = 0;
86
87#define ARC_LLADDR(ifp) (*(u_int8_t *)IF_LLADDR(ifp))
88
89#define senderr(e) { error = (e); goto bad;}
90#define SIN(s) ((const struct sockaddr_in *)(s))
91
92/*
93 * ARCnet output routine.
94 * Encapsulate a packet of type family for the local net.
95 * Assumes that ifp is actually pointer to arccom structure.
96 */
97int
98arc_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
99 struct route *ro)
100{
101 struct arc_header *ah;
102 int error;
103 u_int8_t atype, adst;
104 int loop_copy = 0;
105 int isphds;
106#if defined(INET) || defined(INET6)
107 int is_gw = 0;
108#endif
109
110 if (!((ifp->if_flags & IFF_UP) &&
111 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
112 return(ENETDOWN); /* m, m1 aren't initialized yet */
113
114 error = 0;
115#if defined(INET) || defined(INET6)
116 if (ro != NULL)
117 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
118#endif
119
120 switch (dst->sa_family) {
121#ifdef INET
122 case AF_INET:
123
124 /*
125 * For now, use the simple IP addr -> ARCnet addr mapping
126 */
127 if (m->m_flags & (M_BCAST|M_MCAST))
128 adst = arcbroadcastaddr; /* ARCnet broadcast address */
129 else if (ifp->if_flags & IFF_NOARP)
130 adst = ntohl(SIN(dst)->sin_addr.s_addr) & 0xFF;
131 else {
132 error = arpresolve(ifp, is_gw, m, dst, &adst, NULL);
133 if (error)
134 return (error == EWOULDBLOCK ? 0 : error);
135 }
136
137 atype = (ifp->if_flags & IFF_LINK0) ?
138 ARCTYPE_IP_OLD : ARCTYPE_IP;
139 break;
140 case AF_ARP:
141 {
142 struct arphdr *ah;
143 ah = mtod(m, struct arphdr *);
144 ah->ar_hrd = htons(ARPHRD_ARCNET);
145
146 loop_copy = -1; /* if this is for us, don't do it */
147
148 switch(ntohs(ah->ar_op)) {
149 case ARPOP_REVREQUEST:
150 case ARPOP_REVREPLY:
151 atype = ARCTYPE_REVARP;
152 break;
153 case ARPOP_REQUEST:
154 case ARPOP_REPLY:
155 default:
156 atype = ARCTYPE_ARP;
157 break;
158 }
159
160 if (m->m_flags & M_BCAST)
161 bcopy(ifp->if_broadcastaddr, &adst, ARC_ADDR_LEN);
162 else
163 bcopy(ar_tha(ah), &adst, ARC_ADDR_LEN);
164
165 }
166 break;
167#endif
168#ifdef INET6
169 case AF_INET6:
170 if ((m->m_flags & M_MCAST) != 0)
171 adst = arcbroadcastaddr; /* ARCnet broadcast address */
172 else {
173 error = nd6_resolve(ifp, is_gw, m, dst, &adst, NULL);
174 if (error != 0)
175 return (error == EWOULDBLOCK ? 0 : error);
176 }
177 atype = ARCTYPE_INET6;
178 break;
179#endif
180 case AF_UNSPEC:
181 {
182 const struct arc_header *ah;
183
184 loop_copy = -1;
185 ah = (const struct arc_header *)dst->sa_data;
186 adst = ah->arc_dhost;
187 atype = ah->arc_type;
188
189 if (atype == ARCTYPE_ARP) {
190 atype = (ifp->if_flags & IFF_LINK0) ?
191 ARCTYPE_ARP_OLD: ARCTYPE_ARP;
192
193#ifdef ARCNET_ALLOW_BROKEN_ARP
194 /*
195 * XXX It's not clear per RFC826 if this is needed, but
196 * "assigned numbers" say this is wrong.
197 * However, e.g., AmiTCP 3.0Beta used it... we make this
198 * switchable for emergency cases. Not perfect, but...
199 */
200 if (ifp->if_flags & IFF_LINK2)
201 mtod(m, struct arphdr *)->ar_pro = atype - 1;
202#endif
203 }
204 break;
205 }
206 default:
207 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
208 senderr(EAFNOSUPPORT);
209 }
210
211 isphds = arc_isphds(atype);
212 M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_NOWAIT);
213 if (m == NULL)
214 senderr(ENOBUFS);
215 ah = mtod(m, struct arc_header *);
216 ah->arc_type = atype;
217 ah->arc_dhost = adst;
218 ah->arc_shost = ARC_LLADDR(ifp);
219 if (isphds) {
220 ah->arc_flag = 0;
221 ah->arc_seqid = 0;
222 }
223
224 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
225 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
226 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
227
228 (void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN);
229 } else if (ah->arc_dhost == ah->arc_shost) {
230 (void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN);
231 return (0); /* XXX */
232 }
233 }
234
235 BPF_MTAP(ifp, m);
236
237 error = ifp->if_transmit(ifp, m);
238
239 return (error);
240
241bad:
242 if (m)
243 m_freem(m);
244 return (error);
245}
246
247void
248arc_frag_init(struct ifnet *ifp)
249{
250 struct arccom *ac;
251
252 ac = (struct arccom *)ifp->if_l2com;
253 ac->curr_frag = 0;
254}
255
256struct mbuf *
257arc_frag_next(struct ifnet *ifp)
258{
259 struct arccom *ac;
260 struct mbuf *m;
261 struct arc_header *ah;
262
263 ac = (struct arccom *)ifp->if_l2com;
264 if ((m = ac->curr_frag) == NULL) {
265 int tfrags;
266
267 /* dequeue new packet */
268 IF_DEQUEUE(&ifp->if_snd, m);
269 if (m == NULL)
270 return 0;
271
272 ah = mtod(m, struct arc_header *);
273 if (!arc_isphds(ah->arc_type))
274 return m;
275
276 ++ac->ac_seqid; /* make the seqid unique */
| 3
4/*-
5 * Copyright (c) 1994, 1995 Ignatios Souvatzis
6 * Copyright (c) 1982, 1989, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: NetBSD: if_ethersubr.c,v 1.9 1994/06/29 06:36:11 cgd Exp
38 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
39 *
40 */
41#include "opt_inet.h"
42#include "opt_inet6.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/kernel.h>
47#include <sys/module.h>
48#include <sys/malloc.h>
49#include <sys/mbuf.h>
50#include <sys/protosw.h>
51#include <sys/socket.h>
52#include <sys/sockio.h>
53#include <sys/errno.h>
54#include <sys/syslog.h>
55
56#include <machine/cpu.h>
57
58#include <net/if.h>
59#include <net/if_var.h>
60#include <net/netisr.h>
61#include <net/route.h>
62#include <net/if_dl.h>
63#include <net/if_types.h>
64#include <net/if_arc.h>
65#include <net/if_arp.h>
66#include <net/bpf.h>
67#include <net/if_llatbl.h>
68
69#if defined(INET) || defined(INET6)
70#include <netinet/in.h>
71#include <netinet/in_var.h>
72#include <netinet/if_ether.h>
73#endif
74
75#ifdef INET6
76#include <netinet6/nd6.h>
77#endif
78
79#define ARCNET_ALLOW_BROKEN_ARP
80
81static struct mbuf *arc_defrag(struct ifnet *, struct mbuf *);
82static int arc_resolvemulti(struct ifnet *, struct sockaddr **,
83 struct sockaddr *);
84
85u_int8_t arcbroadcastaddr = 0;
86
87#define ARC_LLADDR(ifp) (*(u_int8_t *)IF_LLADDR(ifp))
88
89#define senderr(e) { error = (e); goto bad;}
90#define SIN(s) ((const struct sockaddr_in *)(s))
91
92/*
93 * ARCnet output routine.
94 * Encapsulate a packet of type family for the local net.
95 * Assumes that ifp is actually pointer to arccom structure.
96 */
97int
98arc_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
99 struct route *ro)
100{
101 struct arc_header *ah;
102 int error;
103 u_int8_t atype, adst;
104 int loop_copy = 0;
105 int isphds;
106#if defined(INET) || defined(INET6)
107 int is_gw = 0;
108#endif
109
110 if (!((ifp->if_flags & IFF_UP) &&
111 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
112 return(ENETDOWN); /* m, m1 aren't initialized yet */
113
114 error = 0;
115#if defined(INET) || defined(INET6)
116 if (ro != NULL)
117 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
118#endif
119
120 switch (dst->sa_family) {
121#ifdef INET
122 case AF_INET:
123
124 /*
125 * For now, use the simple IP addr -> ARCnet addr mapping
126 */
127 if (m->m_flags & (M_BCAST|M_MCAST))
128 adst = arcbroadcastaddr; /* ARCnet broadcast address */
129 else if (ifp->if_flags & IFF_NOARP)
130 adst = ntohl(SIN(dst)->sin_addr.s_addr) & 0xFF;
131 else {
132 error = arpresolve(ifp, is_gw, m, dst, &adst, NULL);
133 if (error)
134 return (error == EWOULDBLOCK ? 0 : error);
135 }
136
137 atype = (ifp->if_flags & IFF_LINK0) ?
138 ARCTYPE_IP_OLD : ARCTYPE_IP;
139 break;
140 case AF_ARP:
141 {
142 struct arphdr *ah;
143 ah = mtod(m, struct arphdr *);
144 ah->ar_hrd = htons(ARPHRD_ARCNET);
145
146 loop_copy = -1; /* if this is for us, don't do it */
147
148 switch(ntohs(ah->ar_op)) {
149 case ARPOP_REVREQUEST:
150 case ARPOP_REVREPLY:
151 atype = ARCTYPE_REVARP;
152 break;
153 case ARPOP_REQUEST:
154 case ARPOP_REPLY:
155 default:
156 atype = ARCTYPE_ARP;
157 break;
158 }
159
160 if (m->m_flags & M_BCAST)
161 bcopy(ifp->if_broadcastaddr, &adst, ARC_ADDR_LEN);
162 else
163 bcopy(ar_tha(ah), &adst, ARC_ADDR_LEN);
164
165 }
166 break;
167#endif
168#ifdef INET6
169 case AF_INET6:
170 if ((m->m_flags & M_MCAST) != 0)
171 adst = arcbroadcastaddr; /* ARCnet broadcast address */
172 else {
173 error = nd6_resolve(ifp, is_gw, m, dst, &adst, NULL);
174 if (error != 0)
175 return (error == EWOULDBLOCK ? 0 : error);
176 }
177 atype = ARCTYPE_INET6;
178 break;
179#endif
180 case AF_UNSPEC:
181 {
182 const struct arc_header *ah;
183
184 loop_copy = -1;
185 ah = (const struct arc_header *)dst->sa_data;
186 adst = ah->arc_dhost;
187 atype = ah->arc_type;
188
189 if (atype == ARCTYPE_ARP) {
190 atype = (ifp->if_flags & IFF_LINK0) ?
191 ARCTYPE_ARP_OLD: ARCTYPE_ARP;
192
193#ifdef ARCNET_ALLOW_BROKEN_ARP
194 /*
195 * XXX It's not clear per RFC826 if this is needed, but
196 * "assigned numbers" say this is wrong.
197 * However, e.g., AmiTCP 3.0Beta used it... we make this
198 * switchable for emergency cases. Not perfect, but...
199 */
200 if (ifp->if_flags & IFF_LINK2)
201 mtod(m, struct arphdr *)->ar_pro = atype - 1;
202#endif
203 }
204 break;
205 }
206 default:
207 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
208 senderr(EAFNOSUPPORT);
209 }
210
211 isphds = arc_isphds(atype);
212 M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_NOWAIT);
213 if (m == NULL)
214 senderr(ENOBUFS);
215 ah = mtod(m, struct arc_header *);
216 ah->arc_type = atype;
217 ah->arc_dhost = adst;
218 ah->arc_shost = ARC_LLADDR(ifp);
219 if (isphds) {
220 ah->arc_flag = 0;
221 ah->arc_seqid = 0;
222 }
223
224 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
225 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
226 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
227
228 (void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN);
229 } else if (ah->arc_dhost == ah->arc_shost) {
230 (void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN);
231 return (0); /* XXX */
232 }
233 }
234
235 BPF_MTAP(ifp, m);
236
237 error = ifp->if_transmit(ifp, m);
238
239 return (error);
240
241bad:
242 if (m)
243 m_freem(m);
244 return (error);
245}
246
247void
248arc_frag_init(struct ifnet *ifp)
249{
250 struct arccom *ac;
251
252 ac = (struct arccom *)ifp->if_l2com;
253 ac->curr_frag = 0;
254}
255
256struct mbuf *
257arc_frag_next(struct ifnet *ifp)
258{
259 struct arccom *ac;
260 struct mbuf *m;
261 struct arc_header *ah;
262
263 ac = (struct arccom *)ifp->if_l2com;
264 if ((m = ac->curr_frag) == NULL) {
265 int tfrags;
266
267 /* dequeue new packet */
268 IF_DEQUEUE(&ifp->if_snd, m);
269 if (m == NULL)
270 return 0;
271
272 ah = mtod(m, struct arc_header *);
273 if (!arc_isphds(ah->arc_type))
274 return m;
275
276 ++ac->ac_seqid; /* make the seqid unique */
|
278 ac->fsflag = 2 * tfrags - 3;
279 ac->sflag = 0;
280 ac->rsflag = ac->fsflag;
281 ac->arc_dhost = ah->arc_dhost;
282 ac->arc_shost = ah->arc_shost;
283 ac->arc_type = ah->arc_type;
284
285 m_adj(m, ARC_HDRNEWLEN);
286 ac->curr_frag = m;
287 }
288
289 /* split out next fragment and return it */
290 if (ac->sflag < ac->fsflag) {
291 /* we CAN'T have short packets here */
292 ac->curr_frag = m_split(m, ARC_MAX_DATA, M_NOWAIT);
293 if (ac->curr_frag == 0) {
294 m_freem(m);
295 return 0;
296 }
297
298 M_PREPEND(m, ARC_HDRNEWLEN, M_NOWAIT);
299 if (m == NULL) {
300 m_freem(ac->curr_frag);
301 ac->curr_frag = 0;
302 return 0;
303 }
304
305 ah = mtod(m, struct arc_header *);
306 ah->arc_flag = ac->rsflag;
307 ah->arc_seqid = ac->ac_seqid;
308
309 ac->sflag += 2;
310 ac->rsflag = ac->sflag;
311 } else if ((m->m_pkthdr.len >=
312 ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) &&
313 (m->m_pkthdr.len <=
314 ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) {
315 ac->curr_frag = 0;
316
317 M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_NOWAIT);
318 if (m == NULL)
319 return 0;
320
321 ah = mtod(m, struct arc_header *);
322 ah->arc_flag = 0xFF;
323 ah->arc_seqid = 0xFFFF;
324 ah->arc_type2 = ac->arc_type;
325 ah->arc_flag2 = ac->sflag;
326 ah->arc_seqid2 = ac->ac_seqid;
327 } else {
328 ac->curr_frag = 0;
329
330 M_PREPEND(m, ARC_HDRNEWLEN, M_NOWAIT);
331 if (m == NULL)
332 return 0;
333
334 ah = mtod(m, struct arc_header *);
335 ah->arc_flag = ac->sflag;
336 ah->arc_seqid = ac->ac_seqid;
337 }
338
339 ah->arc_dhost = ac->arc_dhost;
340 ah->arc_shost = ac->arc_shost;
341 ah->arc_type = ac->arc_type;
342
343 return m;
344}
345
346/*
347 * Defragmenter. Returns mbuf if last packet found, else
348 * NULL. frees imcoming mbuf as necessary.
349 */
350
351static __inline struct mbuf *
352arc_defrag(struct ifnet *ifp, struct mbuf *m)
353{
354 struct arc_header *ah, *ah1;
355 struct arccom *ac;
356 struct ac_frag *af;
357 struct mbuf *m1;
358 char *s;
359 int newflen;
360 u_char src,dst,typ;
361
362 ac = (struct arccom *)ifp->if_l2com;
363
364 if (m->m_len < ARC_HDRNEWLEN) {
365 m = m_pullup(m, ARC_HDRNEWLEN);
366 if (m == NULL) {
367 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
368 return NULL;
369 }
370 }
371
372 ah = mtod(m, struct arc_header *);
373 typ = ah->arc_type;
374
375 if (!arc_isphds(typ))
376 return m;
377
378 src = ah->arc_shost;
379 dst = ah->arc_dhost;
380
381 if (ah->arc_flag == 0xff) {
382 m_adj(m, 4);
383
384 if (m->m_len < ARC_HDRNEWLEN) {
385 m = m_pullup(m, ARC_HDRNEWLEN);
386 if (m == NULL) {
387 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
388 return NULL;
389 }
390 }
391
392 ah = mtod(m, struct arc_header *);
393 }
394
395 af = &ac->ac_fragtab[src];
396 m1 = af->af_packet;
397 s = "debug code error";
398
399 if (ah->arc_flag & 1) {
400 /*
401 * first fragment. We always initialize, which is
402 * about the right thing to do, as we only want to
403 * accept one fragmented packet per src at a time.
404 */
405 if (m1 != NULL)
406 m_freem(m1);
407
408 af->af_packet = m;
409 m1 = m;
410 af->af_maxflag = ah->arc_flag;
411 af->af_lastseen = 0;
412 af->af_seqid = ah->arc_seqid;
413
414 return NULL;
415 /* notreached */
416 } else {
417 /* check for unfragmented packet */
418 if (ah->arc_flag == 0)
419 return m;
420
421 /* do we have a first packet from that src? */
422 if (m1 == NULL) {
423 s = "no first frag";
424 goto outofseq;
425 }
426
427 ah1 = mtod(m1, struct arc_header *);
428
429 if (ah->arc_seqid != ah1->arc_seqid) {
430 s = "seqid differs";
431 goto outofseq;
432 }
433
434 if (typ != ah1->arc_type) {
435 s = "type differs";
436 goto outofseq;
437 }
438
439 if (dst != ah1->arc_dhost) {
440 s = "dest host differs";
441 goto outofseq;
442 }
443
444 /* typ, seqid and dst are ok here. */
445
446 if (ah->arc_flag == af->af_lastseen) {
447 m_freem(m);
448 return NULL;
449 }
450
451 if (ah->arc_flag == af->af_lastseen + 2) {
452 /* ok, this is next fragment */
453 af->af_lastseen = ah->arc_flag;
454 m_adj(m,ARC_HDRNEWLEN);
455
456 /*
457 * m_cat might free the first mbuf (with pkthdr)
458 * in 2nd chain; therefore:
459 */
460
461 newflen = m->m_pkthdr.len;
462
463 m_cat(m1,m);
464
465 m1->m_pkthdr.len += newflen;
466
467 /* is it the last one? */
468 if (af->af_lastseen > af->af_maxflag) {
469 af->af_packet = NULL;
470 return(m1);
471 } else
472 return NULL;
473 }
474 s = "other reason";
475 /* if all else fails, it is out of sequence, too */
476 }
477outofseq:
478 if (m1) {
479 m_freem(m1);
480 af->af_packet = NULL;
481 }
482
483 if (m)
484 m_freem(m);
485
486 log(LOG_INFO,"%s: got out of seq. packet: %s\n",
487 ifp->if_xname, s);
488
489 return NULL;
490}
491
492/*
493 * return 1 if Packet Header Definition Standard, else 0.
494 * For now: old IP, old ARP aren't obviously. Lacking correct information,
495 * we guess that besides new IP and new ARP also IPX and APPLETALK are PHDS.
496 * (Apple and Novell corporations were involved, among others, in PHDS work).
497 * Easiest is to assume that everybody else uses that, too.
498 */
499int
500arc_isphds(u_int8_t type)
501{
502 return (type != ARCTYPE_IP_OLD &&
503 type != ARCTYPE_ARP_OLD &&
504 type != ARCTYPE_DIAGNOSE);
505}
506
507/*
508 * Process a received Arcnet packet;
509 * the packet is in the mbuf chain m with
510 * the ARCnet header.
511 */
512void
513arc_input(struct ifnet *ifp, struct mbuf *m)
514{
515 struct arc_header *ah;
516 int isr;
517 u_int8_t atype;
518
519 if ((ifp->if_flags & IFF_UP) == 0) {
520 m_freem(m);
521 return;
522 }
523
524 /* possibly defragment: */
525 m = arc_defrag(ifp, m);
526 if (m == NULL)
527 return;
528
529 BPF_MTAP(ifp, m);
530
531 ah = mtod(m, struct arc_header *);
532 /* does this belong to us? */
533 if ((ifp->if_flags & IFF_PROMISC) == 0
534 && ah->arc_dhost != arcbroadcastaddr
535 && ah->arc_dhost != ARC_LLADDR(ifp)) {
536 m_freem(m);
537 return;
538 }
539
540 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
541
542 if (ah->arc_dhost == arcbroadcastaddr) {
543 m->m_flags |= M_BCAST|M_MCAST;
544 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
545 }
546
547 atype = ah->arc_type;
548 switch (atype) {
549#ifdef INET
550 case ARCTYPE_IP:
551 m_adj(m, ARC_HDRNEWLEN);
552 isr = NETISR_IP;
553 break;
554
555 case ARCTYPE_IP_OLD:
556 m_adj(m, ARC_HDRLEN);
557 isr = NETISR_IP;
558 break;
559
560 case ARCTYPE_ARP:
561 if (ifp->if_flags & IFF_NOARP) {
562 /* Discard packet if ARP is disabled on interface */
563 m_freem(m);
564 return;
565 }
566 m_adj(m, ARC_HDRNEWLEN);
567 isr = NETISR_ARP;
568#ifdef ARCNET_ALLOW_BROKEN_ARP
569 mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
570#endif
571 break;
572
573 case ARCTYPE_ARP_OLD:
574 if (ifp->if_flags & IFF_NOARP) {
575 /* Discard packet if ARP is disabled on interface */
576 m_freem(m);
577 return;
578 }
579 m_adj(m, ARC_HDRLEN);
580 isr = NETISR_ARP;
581#ifdef ARCNET_ALLOW_BROKEN_ARP
582 mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
583#endif
584 break;
585#endif
586#ifdef INET6
587 case ARCTYPE_INET6:
588 m_adj(m, ARC_HDRNEWLEN);
589 isr = NETISR_IPV6;
590 break;
591#endif
592 default:
593 m_freem(m);
594 return;
595 }
596 M_SETFIB(m, ifp->if_fib);
597 netisr_dispatch(isr, m);
598}
599
600/*
601 * Register (new) link level address.
602 */
603void
604arc_storelladdr(struct ifnet *ifp, u_int8_t lla)
605{
606 ARC_LLADDR(ifp) = lla;
607}
608
609/*
610 * Perform common duties while attaching to interface list
611 */
612void
613arc_ifattach(struct ifnet *ifp, u_int8_t lla)
614{
615 struct ifaddr *ifa;
616 struct sockaddr_dl *sdl;
617 struct arccom *ac;
618
619 if_attach(ifp);
620 ifp->if_addrlen = 1;
621 ifp->if_hdrlen = ARC_HDRLEN;
622 ifp->if_mtu = 1500;
623 ifp->if_resolvemulti = arc_resolvemulti;
624 if (ifp->if_baudrate == 0)
625 ifp->if_baudrate = 2500000;
626 ifa = ifp->if_addr;
627 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
628 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
629 sdl->sdl_type = IFT_ARCNET;
630 sdl->sdl_alen = ifp->if_addrlen;
631
632 if (ifp->if_flags & IFF_BROADCAST)
633 ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI;
634
635 ac = (struct arccom *)ifp->if_l2com;
636 ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */
637 if (lla == 0) {
638 /* XXX this message isn't entirely clear, to me -- cgd */
639 log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n",
640 ifp->if_xname, ifp->if_xname);
641 }
642 arc_storelladdr(ifp, lla);
643
644 ifp->if_broadcastaddr = &arcbroadcastaddr;
645
646 bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN);
647}
648
649void
650arc_ifdetach(struct ifnet *ifp)
651{
652 bpfdetach(ifp);
653 if_detach(ifp);
654}
655
656int
657arc_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
658{
659 struct ifaddr *ifa = (struct ifaddr *) data;
660 struct ifreq *ifr = (struct ifreq *) data;
661 int error = 0;
662
663 switch (command) {
664 case SIOCSIFADDR:
665 ifp->if_flags |= IFF_UP;
666 switch (ifa->ifa_addr->sa_family) {
667#ifdef INET
668 case AF_INET:
669 ifp->if_init(ifp->if_softc); /* before arpwhohas */
670 arp_ifinit(ifp, ifa);
671 break;
672#endif
673 default:
674 ifp->if_init(ifp->if_softc);
675 break;
676 }
677 break;
678
679 case SIOCGIFADDR:
680 {
681 struct sockaddr *sa;
682
683 sa = (struct sockaddr *) &ifr->ifr_data;
684 *(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp);
685 }
686 break;
687
688 case SIOCADDMULTI:
689 case SIOCDELMULTI:
690 if (ifr == NULL)
691 error = EAFNOSUPPORT;
692 else {
693 switch (ifr->ifr_addr.sa_family) {
694 case AF_INET:
695 case AF_INET6:
696 error = 0;
697 break;
698 default:
699 error = EAFNOSUPPORT;
700 break;
701 }
702 }
703 break;
704
705 case SIOCSIFMTU:
706 /*
707 * Set the interface MTU.
708 * mtu can't be larger than ARCMTU for RFC1051
709 * and can't be larger than ARC_PHDS_MTU
710 */
711 if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) ||
712 ifr->ifr_mtu > ARC_PHDS_MAXMTU)
713 error = EINVAL;
714 else
715 ifp->if_mtu = ifr->ifr_mtu;
716 break;
717 }
718
719 return (error);
720}
721
722/* based on ether_resolvemulti() */
723int
724arc_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
725 struct sockaddr *sa)
726{
727 struct sockaddr_dl *sdl;
728#ifdef INET
729 struct sockaddr_in *sin;
730#endif
731#ifdef INET6
732 struct sockaddr_in6 *sin6;
733#endif
734
735 switch(sa->sa_family) {
736 case AF_LINK:
737 /*
738 * No mapping needed. Just check that it's a valid MC address.
739 */
740 sdl = (struct sockaddr_dl *)sa;
741 if (*LLADDR(sdl) != arcbroadcastaddr)
742 return EADDRNOTAVAIL;
743 *llsa = NULL;
744 return 0;
745#ifdef INET
746 case AF_INET:
747 sin = (struct sockaddr_in *)sa;
748 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
749 return EADDRNOTAVAIL;
750 sdl = link_init_sdl(ifp, *llsa, IFT_ETHER);
751 sdl->sdl_alen = ARC_ADDR_LEN;
752 *LLADDR(sdl) = 0;
753 *llsa = (struct sockaddr *)sdl;
754 return 0;
755#endif
756#ifdef INET6
757 case AF_INET6:
758 sin6 = (struct sockaddr_in6 *)sa;
759 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
760 /*
761 * An IP6 address of 0 means listen to all
762 * of the Ethernet multicast address used for IP6.
763 * (This is used for multicast routers.)
764 */
765 ifp->if_flags |= IFF_ALLMULTI;
766 *llsa = NULL;
767 return 0;
768 }
769 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
770 return EADDRNOTAVAIL;
771 sdl = link_init_sdl(ifp, *llsa, IFT_ETHER);
772 sdl->sdl_alen = ARC_ADDR_LEN;
773 *LLADDR(sdl) = 0;
774 *llsa = (struct sockaddr *)sdl;
775 return 0;
776#endif
777
778 default:
779 /*
780 * Well, the text isn't quite right, but it's the name
781 * that counts...
782 */
783 return EAFNOSUPPORT;
784 }
785}
786
787static MALLOC_DEFINE(M_ARCCOM, "arccom", "ARCNET interface internals");
788
789static void*
790arc_alloc(u_char type, struct ifnet *ifp)
791{
792 struct arccom *ac;
793
794 ac = malloc(sizeof(struct arccom), M_ARCCOM, M_WAITOK | M_ZERO);
795 ac->ac_ifp = ifp;
796
797 return (ac);
798}
799
800static void
801arc_free(void *com, u_char type)
802{
803
804 free(com, M_ARCCOM);
805}
806
807static int
808arc_modevent(module_t mod, int type, void *data)
809{
810
811 switch (type) {
812 case MOD_LOAD:
813 if_register_com_alloc(IFT_ARCNET, arc_alloc, arc_free);
814 break;
815 case MOD_UNLOAD:
816 if_deregister_com_alloc(IFT_ARCNET);
817 break;
818 default:
819 return EOPNOTSUPP;
820 }
821
822 return (0);
823}
824
825static moduledata_t arc_mod = {
826 "arcnet",
827 arc_modevent,
828 0
829};
830
831DECLARE_MODULE(arcnet, arc_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
832MODULE_VERSION(arcnet, 1);
| 278 ac->fsflag = 2 * tfrags - 3;
279 ac->sflag = 0;
280 ac->rsflag = ac->fsflag;
281 ac->arc_dhost = ah->arc_dhost;
282 ac->arc_shost = ah->arc_shost;
283 ac->arc_type = ah->arc_type;
284
285 m_adj(m, ARC_HDRNEWLEN);
286 ac->curr_frag = m;
287 }
288
289 /* split out next fragment and return it */
290 if (ac->sflag < ac->fsflag) {
291 /* we CAN'T have short packets here */
292 ac->curr_frag = m_split(m, ARC_MAX_DATA, M_NOWAIT);
293 if (ac->curr_frag == 0) {
294 m_freem(m);
295 return 0;
296 }
297
298 M_PREPEND(m, ARC_HDRNEWLEN, M_NOWAIT);
299 if (m == NULL) {
300 m_freem(ac->curr_frag);
301 ac->curr_frag = 0;
302 return 0;
303 }
304
305 ah = mtod(m, struct arc_header *);
306 ah->arc_flag = ac->rsflag;
307 ah->arc_seqid = ac->ac_seqid;
308
309 ac->sflag += 2;
310 ac->rsflag = ac->sflag;
311 } else if ((m->m_pkthdr.len >=
312 ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) &&
313 (m->m_pkthdr.len <=
314 ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) {
315 ac->curr_frag = 0;
316
317 M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_NOWAIT);
318 if (m == NULL)
319 return 0;
320
321 ah = mtod(m, struct arc_header *);
322 ah->arc_flag = 0xFF;
323 ah->arc_seqid = 0xFFFF;
324 ah->arc_type2 = ac->arc_type;
325 ah->arc_flag2 = ac->sflag;
326 ah->arc_seqid2 = ac->ac_seqid;
327 } else {
328 ac->curr_frag = 0;
329
330 M_PREPEND(m, ARC_HDRNEWLEN, M_NOWAIT);
331 if (m == NULL)
332 return 0;
333
334 ah = mtod(m, struct arc_header *);
335 ah->arc_flag = ac->sflag;
336 ah->arc_seqid = ac->ac_seqid;
337 }
338
339 ah->arc_dhost = ac->arc_dhost;
340 ah->arc_shost = ac->arc_shost;
341 ah->arc_type = ac->arc_type;
342
343 return m;
344}
345
346/*
347 * Defragmenter. Returns mbuf if last packet found, else
348 * NULL. frees imcoming mbuf as necessary.
349 */
350
351static __inline struct mbuf *
352arc_defrag(struct ifnet *ifp, struct mbuf *m)
353{
354 struct arc_header *ah, *ah1;
355 struct arccom *ac;
356 struct ac_frag *af;
357 struct mbuf *m1;
358 char *s;
359 int newflen;
360 u_char src,dst,typ;
361
362 ac = (struct arccom *)ifp->if_l2com;
363
364 if (m->m_len < ARC_HDRNEWLEN) {
365 m = m_pullup(m, ARC_HDRNEWLEN);
366 if (m == NULL) {
367 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
368 return NULL;
369 }
370 }
371
372 ah = mtod(m, struct arc_header *);
373 typ = ah->arc_type;
374
375 if (!arc_isphds(typ))
376 return m;
377
378 src = ah->arc_shost;
379 dst = ah->arc_dhost;
380
381 if (ah->arc_flag == 0xff) {
382 m_adj(m, 4);
383
384 if (m->m_len < ARC_HDRNEWLEN) {
385 m = m_pullup(m, ARC_HDRNEWLEN);
386 if (m == NULL) {
387 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
388 return NULL;
389 }
390 }
391
392 ah = mtod(m, struct arc_header *);
393 }
394
395 af = &ac->ac_fragtab[src];
396 m1 = af->af_packet;
397 s = "debug code error";
398
399 if (ah->arc_flag & 1) {
400 /*
401 * first fragment. We always initialize, which is
402 * about the right thing to do, as we only want to
403 * accept one fragmented packet per src at a time.
404 */
405 if (m1 != NULL)
406 m_freem(m1);
407
408 af->af_packet = m;
409 m1 = m;
410 af->af_maxflag = ah->arc_flag;
411 af->af_lastseen = 0;
412 af->af_seqid = ah->arc_seqid;
413
414 return NULL;
415 /* notreached */
416 } else {
417 /* check for unfragmented packet */
418 if (ah->arc_flag == 0)
419 return m;
420
421 /* do we have a first packet from that src? */
422 if (m1 == NULL) {
423 s = "no first frag";
424 goto outofseq;
425 }
426
427 ah1 = mtod(m1, struct arc_header *);
428
429 if (ah->arc_seqid != ah1->arc_seqid) {
430 s = "seqid differs";
431 goto outofseq;
432 }
433
434 if (typ != ah1->arc_type) {
435 s = "type differs";
436 goto outofseq;
437 }
438
439 if (dst != ah1->arc_dhost) {
440 s = "dest host differs";
441 goto outofseq;
442 }
443
444 /* typ, seqid and dst are ok here. */
445
446 if (ah->arc_flag == af->af_lastseen) {
447 m_freem(m);
448 return NULL;
449 }
450
451 if (ah->arc_flag == af->af_lastseen + 2) {
452 /* ok, this is next fragment */
453 af->af_lastseen = ah->arc_flag;
454 m_adj(m,ARC_HDRNEWLEN);
455
456 /*
457 * m_cat might free the first mbuf (with pkthdr)
458 * in 2nd chain; therefore:
459 */
460
461 newflen = m->m_pkthdr.len;
462
463 m_cat(m1,m);
464
465 m1->m_pkthdr.len += newflen;
466
467 /* is it the last one? */
468 if (af->af_lastseen > af->af_maxflag) {
469 af->af_packet = NULL;
470 return(m1);
471 } else
472 return NULL;
473 }
474 s = "other reason";
475 /* if all else fails, it is out of sequence, too */
476 }
477outofseq:
478 if (m1) {
479 m_freem(m1);
480 af->af_packet = NULL;
481 }
482
483 if (m)
484 m_freem(m);
485
486 log(LOG_INFO,"%s: got out of seq. packet: %s\n",
487 ifp->if_xname, s);
488
489 return NULL;
490}
491
492/*
493 * return 1 if Packet Header Definition Standard, else 0.
494 * For now: old IP, old ARP aren't obviously. Lacking correct information,
495 * we guess that besides new IP and new ARP also IPX and APPLETALK are PHDS.
496 * (Apple and Novell corporations were involved, among others, in PHDS work).
497 * Easiest is to assume that everybody else uses that, too.
498 */
499int
500arc_isphds(u_int8_t type)
501{
502 return (type != ARCTYPE_IP_OLD &&
503 type != ARCTYPE_ARP_OLD &&
504 type != ARCTYPE_DIAGNOSE);
505}
506
507/*
508 * Process a received Arcnet packet;
509 * the packet is in the mbuf chain m with
510 * the ARCnet header.
511 */
512void
513arc_input(struct ifnet *ifp, struct mbuf *m)
514{
515 struct arc_header *ah;
516 int isr;
517 u_int8_t atype;
518
519 if ((ifp->if_flags & IFF_UP) == 0) {
520 m_freem(m);
521 return;
522 }
523
524 /* possibly defragment: */
525 m = arc_defrag(ifp, m);
526 if (m == NULL)
527 return;
528
529 BPF_MTAP(ifp, m);
530
531 ah = mtod(m, struct arc_header *);
532 /* does this belong to us? */
533 if ((ifp->if_flags & IFF_PROMISC) == 0
534 && ah->arc_dhost != arcbroadcastaddr
535 && ah->arc_dhost != ARC_LLADDR(ifp)) {
536 m_freem(m);
537 return;
538 }
539
540 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
541
542 if (ah->arc_dhost == arcbroadcastaddr) {
543 m->m_flags |= M_BCAST|M_MCAST;
544 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
545 }
546
547 atype = ah->arc_type;
548 switch (atype) {
549#ifdef INET
550 case ARCTYPE_IP:
551 m_adj(m, ARC_HDRNEWLEN);
552 isr = NETISR_IP;
553 break;
554
555 case ARCTYPE_IP_OLD:
556 m_adj(m, ARC_HDRLEN);
557 isr = NETISR_IP;
558 break;
559
560 case ARCTYPE_ARP:
561 if (ifp->if_flags & IFF_NOARP) {
562 /* Discard packet if ARP is disabled on interface */
563 m_freem(m);
564 return;
565 }
566 m_adj(m, ARC_HDRNEWLEN);
567 isr = NETISR_ARP;
568#ifdef ARCNET_ALLOW_BROKEN_ARP
569 mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
570#endif
571 break;
572
573 case ARCTYPE_ARP_OLD:
574 if (ifp->if_flags & IFF_NOARP) {
575 /* Discard packet if ARP is disabled on interface */
576 m_freem(m);
577 return;
578 }
579 m_adj(m, ARC_HDRLEN);
580 isr = NETISR_ARP;
581#ifdef ARCNET_ALLOW_BROKEN_ARP
582 mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
583#endif
584 break;
585#endif
586#ifdef INET6
587 case ARCTYPE_INET6:
588 m_adj(m, ARC_HDRNEWLEN);
589 isr = NETISR_IPV6;
590 break;
591#endif
592 default:
593 m_freem(m);
594 return;
595 }
596 M_SETFIB(m, ifp->if_fib);
597 netisr_dispatch(isr, m);
598}
599
600/*
601 * Register (new) link level address.
602 */
603void
604arc_storelladdr(struct ifnet *ifp, u_int8_t lla)
605{
606 ARC_LLADDR(ifp) = lla;
607}
608
609/*
610 * Perform common duties while attaching to interface list
611 */
612void
613arc_ifattach(struct ifnet *ifp, u_int8_t lla)
614{
615 struct ifaddr *ifa;
616 struct sockaddr_dl *sdl;
617 struct arccom *ac;
618
619 if_attach(ifp);
620 ifp->if_addrlen = 1;
621 ifp->if_hdrlen = ARC_HDRLEN;
622 ifp->if_mtu = 1500;
623 ifp->if_resolvemulti = arc_resolvemulti;
624 if (ifp->if_baudrate == 0)
625 ifp->if_baudrate = 2500000;
626 ifa = ifp->if_addr;
627 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
628 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
629 sdl->sdl_type = IFT_ARCNET;
630 sdl->sdl_alen = ifp->if_addrlen;
631
632 if (ifp->if_flags & IFF_BROADCAST)
633 ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI;
634
635 ac = (struct arccom *)ifp->if_l2com;
636 ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */
637 if (lla == 0) {
638 /* XXX this message isn't entirely clear, to me -- cgd */
639 log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n",
640 ifp->if_xname, ifp->if_xname);
641 }
642 arc_storelladdr(ifp, lla);
643
644 ifp->if_broadcastaddr = &arcbroadcastaddr;
645
646 bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN);
647}
648
649void
650arc_ifdetach(struct ifnet *ifp)
651{
652 bpfdetach(ifp);
653 if_detach(ifp);
654}
655
656int
657arc_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
658{
659 struct ifaddr *ifa = (struct ifaddr *) data;
660 struct ifreq *ifr = (struct ifreq *) data;
661 int error = 0;
662
663 switch (command) {
664 case SIOCSIFADDR:
665 ifp->if_flags |= IFF_UP;
666 switch (ifa->ifa_addr->sa_family) {
667#ifdef INET
668 case AF_INET:
669 ifp->if_init(ifp->if_softc); /* before arpwhohas */
670 arp_ifinit(ifp, ifa);
671 break;
672#endif
673 default:
674 ifp->if_init(ifp->if_softc);
675 break;
676 }
677 break;
678
679 case SIOCGIFADDR:
680 {
681 struct sockaddr *sa;
682
683 sa = (struct sockaddr *) &ifr->ifr_data;
684 *(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp);
685 }
686 break;
687
688 case SIOCADDMULTI:
689 case SIOCDELMULTI:
690 if (ifr == NULL)
691 error = EAFNOSUPPORT;
692 else {
693 switch (ifr->ifr_addr.sa_family) {
694 case AF_INET:
695 case AF_INET6:
696 error = 0;
697 break;
698 default:
699 error = EAFNOSUPPORT;
700 break;
701 }
702 }
703 break;
704
705 case SIOCSIFMTU:
706 /*
707 * Set the interface MTU.
708 * mtu can't be larger than ARCMTU for RFC1051
709 * and can't be larger than ARC_PHDS_MTU
710 */
711 if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) ||
712 ifr->ifr_mtu > ARC_PHDS_MAXMTU)
713 error = EINVAL;
714 else
715 ifp->if_mtu = ifr->ifr_mtu;
716 break;
717 }
718
719 return (error);
720}
721
722/* based on ether_resolvemulti() */
723int
724arc_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
725 struct sockaddr *sa)
726{
727 struct sockaddr_dl *sdl;
728#ifdef INET
729 struct sockaddr_in *sin;
730#endif
731#ifdef INET6
732 struct sockaddr_in6 *sin6;
733#endif
734
735 switch(sa->sa_family) {
736 case AF_LINK:
737 /*
738 * No mapping needed. Just check that it's a valid MC address.
739 */
740 sdl = (struct sockaddr_dl *)sa;
741 if (*LLADDR(sdl) != arcbroadcastaddr)
742 return EADDRNOTAVAIL;
743 *llsa = NULL;
744 return 0;
745#ifdef INET
746 case AF_INET:
747 sin = (struct sockaddr_in *)sa;
748 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
749 return EADDRNOTAVAIL;
750 sdl = link_init_sdl(ifp, *llsa, IFT_ETHER);
751 sdl->sdl_alen = ARC_ADDR_LEN;
752 *LLADDR(sdl) = 0;
753 *llsa = (struct sockaddr *)sdl;
754 return 0;
755#endif
756#ifdef INET6
757 case AF_INET6:
758 sin6 = (struct sockaddr_in6 *)sa;
759 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
760 /*
761 * An IP6 address of 0 means listen to all
762 * of the Ethernet multicast address used for IP6.
763 * (This is used for multicast routers.)
764 */
765 ifp->if_flags |= IFF_ALLMULTI;
766 *llsa = NULL;
767 return 0;
768 }
769 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
770 return EADDRNOTAVAIL;
771 sdl = link_init_sdl(ifp, *llsa, IFT_ETHER);
772 sdl->sdl_alen = ARC_ADDR_LEN;
773 *LLADDR(sdl) = 0;
774 *llsa = (struct sockaddr *)sdl;
775 return 0;
776#endif
777
778 default:
779 /*
780 * Well, the text isn't quite right, but it's the name
781 * that counts...
782 */
783 return EAFNOSUPPORT;
784 }
785}
786
787static MALLOC_DEFINE(M_ARCCOM, "arccom", "ARCNET interface internals");
788
789static void*
790arc_alloc(u_char type, struct ifnet *ifp)
791{
792 struct arccom *ac;
793
794 ac = malloc(sizeof(struct arccom), M_ARCCOM, M_WAITOK | M_ZERO);
795 ac->ac_ifp = ifp;
796
797 return (ac);
798}
799
800static void
801arc_free(void *com, u_char type)
802{
803
804 free(com, M_ARCCOM);
805}
806
807static int
808arc_modevent(module_t mod, int type, void *data)
809{
810
811 switch (type) {
812 case MOD_LOAD:
813 if_register_com_alloc(IFT_ARCNET, arc_alloc, arc_free);
814 break;
815 case MOD_UNLOAD:
816 if_deregister_com_alloc(IFT_ARCNET);
817 break;
818 default:
819 return EOPNOTSUPP;
820 }
821
822 return (0);
823}
824
825static moduledata_t arc_mod = {
826 "arcnet",
827 arc_modevent,
828 0
829};
830
831DECLARE_MODULE(arcnet, arc_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
832MODULE_VERSION(arcnet, 1);
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