1/*
2 * Copyright (c) 1982, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
| 1/*
2 * Copyright (c) 1982, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
|
34 * $FreeBSD: head/sys/net/if_ethersubr.c 107114 2002-11-20 19:07:27Z luigi $
| 34 * $FreeBSD: head/sys/net/if_ethersubr.c 108107 2002-12-19 22:58:27Z bmilekic $
|
35 */
36
37#include "opt_atalk.h"
38#include "opt_inet.h"
39#include "opt_inet6.h"
40#include "opt_ipx.h"
41#include "opt_bdg.h"
42#include "opt_mac.h"
43#include "opt_netgraph.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/kernel.h>
48#include <sys/mac.h>
49#include <sys/malloc.h>
50#include <sys/mbuf.h>
51#include <sys/random.h>
52#include <sys/socket.h>
53#include <sys/sockio.h>
54#include <sys/sysctl.h>
55
56#include <net/if.h>
57#include <net/netisr.h>
58#include <net/route.h>
59#include <net/if_llc.h>
60#include <net/if_dl.h>
61#include <net/if_types.h>
62#include <net/bpf.h>
63#include <net/ethernet.h>
64#include <net/bridge.h>
65#include <net/if_vlan_var.h>
66
67#if defined(INET) || defined(INET6)
68#include <netinet/in.h>
69#include <netinet/in_var.h>
70#include <netinet/if_ether.h>
71#include <netinet/ip_fw.h>
72#include <netinet/ip_dummynet.h>
73#endif
74#ifdef INET6
75#include <netinet6/nd6.h>
76#endif
77
78#ifdef IPX
79#include <netipx/ipx.h>
80#include <netipx/ipx_if.h>
81int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
82int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
83 struct sockaddr *dst, short *tp, int *hlen);
84#endif
85
86#ifdef NS
87#include <netns/ns.h>
88#include <netns/ns_if.h>
89ushort ns_nettype;
90int ether_outputdebug = 0;
91int ether_inputdebug = 0;
92#endif
93
94#ifdef NETATALK
95#include <netatalk/at.h>
96#include <netatalk/at_var.h>
97#include <netatalk/at_extern.h>
98
99#define llc_snap_org_code llc_un.type_snap.org_code
100#define llc_snap_ether_type llc_un.type_snap.ether_type
101
102extern u_char at_org_code[3];
103extern u_char aarp_org_code[3];
104#endif /* NETATALK */
105
106/* netgraph node hooks for ng_ether(4) */
107void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
108void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
109int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
110void (*ng_ether_attach_p)(struct ifnet *ifp);
111void (*ng_ether_detach_p)(struct ifnet *ifp);
112
113void (*vlan_input_p)(struct ifnet *, struct mbuf *);
114
115/* bridge support */
116int do_bridge;
117bridge_in_t *bridge_in_ptr;
118bdg_forward_t *bdg_forward_ptr;
119bdgtakeifaces_t *bdgtakeifaces_ptr;
120struct bdg_softc *ifp2sc;
121
122static int ether_resolvemulti(struct ifnet *, struct sockaddr **,
123 struct sockaddr *);
124u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
125#define senderr(e) do { error = (e); goto bad;} while (0)
126#define IFP2AC(IFP) ((struct arpcom *)IFP)
127
128int
129ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst,
130 struct ip_fw **rule, int shared);
131static int ether_ipfw;
132
133/*
134 * Ethernet output routine.
135 * Encapsulate a packet of type family for the local net.
136 * Use trailer local net encapsulation if enough data in first
137 * packet leaves a multiple of 512 bytes of data in remainder.
138 * Assumes that ifp is actually pointer to arpcom structure.
139 */
140int
141ether_output(ifp, m, dst, rt0)
142 register struct ifnet *ifp;
143 struct mbuf *m;
144 struct sockaddr *dst;
145 struct rtentry *rt0;
146{
147 short type;
148 int error = 0, hdrcmplt = 0;
149 u_char esrc[6], edst[6];
150 register struct rtentry *rt;
151 register struct ether_header *eh;
152 int loop_copy = 0;
153 int hlen; /* link layer header lenght */
154 struct arpcom *ac = IFP2AC(ifp);
155
156#ifdef MAC
157 error = mac_check_ifnet_transmit(ifp, m);
158 if (error)
159 senderr(error);
160#endif
161
162 if (ifp->if_flags & IFF_MONITOR)
163 senderr(ENETDOWN);
164 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
165 senderr(ENETDOWN);
166 rt = rt0;
167 if (rt) {
168 if ((rt->rt_flags & RTF_UP) == 0) {
169 rt0 = rt = rtalloc1(dst, 1, 0UL);
170 if (rt0)
171 rt->rt_refcnt--;
172 else
173 senderr(EHOSTUNREACH);
174 }
175 if (rt->rt_flags & RTF_GATEWAY) {
176 if (rt->rt_gwroute == 0)
177 goto lookup;
178 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
179 rtfree(rt); rt = rt0;
180 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1,
181 0UL);
182 if ((rt = rt->rt_gwroute) == 0)
183 senderr(EHOSTUNREACH);
184 }
185 }
186 if (rt->rt_flags & RTF_REJECT)
187 if (rt->rt_rmx.rmx_expire == 0 ||
188 time_second < rt->rt_rmx.rmx_expire)
189 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
190 }
191 hlen = ETHER_HDR_LEN;
192 switch (dst->sa_family) {
193#ifdef INET
194 case AF_INET:
195 if (!arpresolve(ifp, rt, m, dst, edst, rt0))
196 return (0); /* if not yet resolved */
197 type = htons(ETHERTYPE_IP);
198 break;
199#endif
200#ifdef INET6
201 case AF_INET6:
202 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) {
203 /* Something bad happened */
204 return(0);
205 }
206 type = htons(ETHERTYPE_IPV6);
207 break;
208#endif
209#ifdef IPX
210 case AF_IPX:
211 if (ef_outputp) {
212 error = ef_outputp(ifp, &m, dst, &type, &hlen);
213 if (error)
214 goto bad;
215 } else
216 type = htons(ETHERTYPE_IPX);
217 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
218 (caddr_t)edst, sizeof (edst));
219 break;
220#endif
221#ifdef NETATALK
222 case AF_APPLETALK:
223 {
224 struct at_ifaddr *aa;
225
226 if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) {
227 goto bad;
228 }
229 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
230 return (0);
231 /*
232 * In the phase 2 case, need to prepend an mbuf for the llc header.
233 * Since we must preserve the value of m, which is passed to us by
234 * value, we m_copy() the first mbuf, and use it for our llc header.
235 */
236 if ( aa->aa_flags & AFA_PHASE2 ) {
237 struct llc llc;
238
239 M_PREPEND(m, sizeof(struct llc), M_TRYWAIT);
240 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
241 llc.llc_control = LLC_UI;
242 bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
243 llc.llc_snap_ether_type = htons( ETHERTYPE_AT );
244 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
245 type = htons(m->m_pkthdr.len);
246 hlen = sizeof(struct llc) + ETHER_HDR_LEN;
247 } else {
248 type = htons(ETHERTYPE_AT);
249 }
250 break;
251 }
252#endif /* NETATALK */
253#ifdef NS
254 case AF_NS:
255 switch(ns_nettype){
256 default:
257 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
258 type = 0x8137;
259 break;
260 case 0x0: /* Novell 802.3 */
261 type = htons( m->m_pkthdr.len);
262 break;
263 case 0xe0e0: /* Novell 802.2 and Token-Ring */
264 M_PREPEND(m, 3, M_TRYWAIT);
265 type = htons( m->m_pkthdr.len);
266 cp = mtod(m, u_char *);
267 *cp++ = 0xE0;
268 *cp++ = 0xE0;
269 *cp++ = 0x03;
270 break;
271 }
272 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
273 (caddr_t)edst, sizeof (edst));
274 /*
275 * XXX if ns_thishost is the same as the node's ethernet
276 * address then just the default code will catch this anyhow.
277 * So I'm not sure if this next clause should be here at all?
278 * [JRE]
279 */
280 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))){
281 m->m_pkthdr.rcvif = ifp;
282 inq = &nsintrq;
283 if (IF_HANDOFF(inq, m, NULL))
284 schednetisr(NETISR_NS);
285 return (error);
286 }
287 if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, sizeof(edst))){
288 m->m_flags |= M_BCAST;
289 }
290 break;
291#endif /* NS */
292
293 case pseudo_AF_HDRCMPLT:
294 hdrcmplt = 1;
295 eh = (struct ether_header *)dst->sa_data;
296 (void)memcpy(esrc, eh->ether_shost, sizeof (esrc));
297 /* FALLTHROUGH */
298
299 case AF_UNSPEC:
300 loop_copy = -1; /* if this is for us, don't do it */
301 eh = (struct ether_header *)dst->sa_data;
302 (void)memcpy(edst, eh->ether_dhost, sizeof (edst));
303 type = eh->ether_type;
304 break;
305
306 default:
307 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
308 senderr(EAFNOSUPPORT);
309 }
310
311 /*
312 * Add local net header. If no space in first mbuf,
313 * allocate another.
314 */
315 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
316 if (m == 0)
317 senderr(ENOBUFS);
318 eh = mtod(m, struct ether_header *);
319 (void)memcpy(&eh->ether_type, &type,
320 sizeof(eh->ether_type));
321 (void)memcpy(eh->ether_dhost, edst, sizeof (edst));
322 if (hdrcmplt)
323 (void)memcpy(eh->ether_shost, esrc,
324 sizeof(eh->ether_shost));
325 else
326 (void)memcpy(eh->ether_shost, ac->ac_enaddr,
327 sizeof(eh->ether_shost));
328
329 /*
330 * If a simplex interface, and the packet is being sent to our
331 * Ethernet address or a broadcast address, loopback a copy.
332 * XXX To make a simplex device behave exactly like a duplex
333 * device, we should copy in the case of sending to our own
334 * ethernet address (thus letting the original actually appear
335 * on the wire). However, we don't do that here for security
336 * reasons and compatibility with the original behavior.
337 */
338 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
339 int csum_flags = 0;
340
341 if (m->m_pkthdr.csum_flags & CSUM_IP)
342 csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID);
343 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
344 csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR);
345 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
346 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
347
348 n->m_pkthdr.csum_flags |= csum_flags;
349 if (csum_flags & CSUM_DATA_VALID)
350 n->m_pkthdr.csum_data = 0xffff;
351
352 (void) if_simloop(ifp, n, dst->sa_family, hlen);
353 } else if (bcmp(eh->ether_dhost,
354 eh->ether_shost, ETHER_ADDR_LEN) == 0) {
355 m->m_pkthdr.csum_flags |= csum_flags;
356 if (csum_flags & CSUM_DATA_VALID)
357 m->m_pkthdr.csum_data = 0xffff;
358 (void) if_simloop(ifp, m, dst->sa_family, hlen);
359 return (0); /* XXX */
360 }
361 }
362
363 /* Handle ng_ether(4) processing, if any */
364 if (ng_ether_output_p != NULL) {
365 if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) {
366bad: if (m != NULL)
367 m_freem(m);
368 return (error);
369 }
370 if (m == NULL)
371 return (0);
372 }
373
374 /* Continue with link-layer output */
375 return ether_output_frame(ifp, m);
376}
377
378/*
379 * Ethernet link layer output routine to send a raw frame to the device.
380 *
381 * This assumes that the 14 byte Ethernet header is present and contiguous
382 * in the first mbuf (if BRIDGE'ing).
383 */
384int
385ether_output_frame(struct ifnet *ifp, struct mbuf *m)
386{
387 struct ip_fw *rule = NULL;
388
389 /* Extract info from dummynet tag, ignore others */
390 for (; m->m_type == MT_TAG; m = m->m_next)
391 if (m->m_flags == PACKET_TAG_DUMMYNET)
392 rule = ((struct dn_pkt *)m)->rule;
393
394 if (rule == NULL && BDG_ACTIVE(ifp)) {
395 /*
396 * Beware, the bridge code notices the null rcvif and
397 * uses that identify that it's being called from
398 * ether_output as opposd to ether_input. Yech.
399 */
400 m->m_pkthdr.rcvif = NULL;
401 m = bdg_forward_ptr(m, ifp);
402 if (m != NULL)
403 m_freem(m);
404 return (0);
405 }
406 if (IPFW_LOADED && ether_ipfw != 0) {
407 if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) {
408 if (m) {
409 m_freem(m);
410 return ENOBUFS; /* pkt dropped */
411 } else
412 return 0; /* consumed e.g. in a pipe */
413 }
414 }
415
416 /*
417 * Queue message on interface, update output statistics if
418 * successful, and start output if interface not yet active.
419 */
420 return (IF_HANDOFF(&ifp->if_snd, m, ifp) ? 0 : ENOBUFS);
421}
422
423/*
424 * ipfw processing for ethernet packets (in and out).
425 * The second parameter is NULL from ether_demux, and ifp from
426 * ether_output_frame. This section of code could be used from
427 * bridge.c as well as long as we use some extra info
428 * to distinguish that case from ether_output_frame();
429 */
430int
431ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst,
432 struct ip_fw **rule, int shared)
433{
434 struct ether_header *eh;
435 struct ether_header save_eh;
436 struct mbuf *m;
437 int i;
438 struct ip_fw_args args;
439
440 if (*rule != NULL && fw_one_pass)
441 return 1; /* dummynet packet, already partially processed */
442
443 /*
444 * I need some amt of data to be contiguous, and in case others need
445 * the packet (shared==1) also better be in the first mbuf.
446 */
447 m = *m0;
448 i = min( m->m_pkthdr.len, max_protohdr);
449 if ( shared || m->m_len < i) {
450 m = m_pullup(m, i);
451 if (m == NULL) {
452 *m0 = m;
453 return 0;
454 }
455 }
456 eh = mtod(m, struct ether_header *);
457 save_eh = *eh; /* save copy for restore below */
458 m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */
459
460 args.m = m; /* the packet we are looking at */
461 args.oif = dst; /* destination, if any */
462 args.divert_rule = 0; /* we do not support divert yet */
463 args.rule = *rule; /* matching rule to restart */
464 args.next_hop = NULL; /* we do not support forward yet */
465 args.eh = &save_eh; /* MAC header for bridged/MAC packets */
466 i = ip_fw_chk_ptr(&args);
467 m = args.m;
468 if (m != NULL) {
469 /*
470 * Restore Ethernet header, as needed, in case the
471 * mbuf chain was replaced by ipfw.
472 */
| 35 */
36
37#include "opt_atalk.h"
38#include "opt_inet.h"
39#include "opt_inet6.h"
40#include "opt_ipx.h"
41#include "opt_bdg.h"
42#include "opt_mac.h"
43#include "opt_netgraph.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/kernel.h>
48#include <sys/mac.h>
49#include <sys/malloc.h>
50#include <sys/mbuf.h>
51#include <sys/random.h>
52#include <sys/socket.h>
53#include <sys/sockio.h>
54#include <sys/sysctl.h>
55
56#include <net/if.h>
57#include <net/netisr.h>
58#include <net/route.h>
59#include <net/if_llc.h>
60#include <net/if_dl.h>
61#include <net/if_types.h>
62#include <net/bpf.h>
63#include <net/ethernet.h>
64#include <net/bridge.h>
65#include <net/if_vlan_var.h>
66
67#if defined(INET) || defined(INET6)
68#include <netinet/in.h>
69#include <netinet/in_var.h>
70#include <netinet/if_ether.h>
71#include <netinet/ip_fw.h>
72#include <netinet/ip_dummynet.h>
73#endif
74#ifdef INET6
75#include <netinet6/nd6.h>
76#endif
77
78#ifdef IPX
79#include <netipx/ipx.h>
80#include <netipx/ipx_if.h>
81int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
82int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
83 struct sockaddr *dst, short *tp, int *hlen);
84#endif
85
86#ifdef NS
87#include <netns/ns.h>
88#include <netns/ns_if.h>
89ushort ns_nettype;
90int ether_outputdebug = 0;
91int ether_inputdebug = 0;
92#endif
93
94#ifdef NETATALK
95#include <netatalk/at.h>
96#include <netatalk/at_var.h>
97#include <netatalk/at_extern.h>
98
99#define llc_snap_org_code llc_un.type_snap.org_code
100#define llc_snap_ether_type llc_un.type_snap.ether_type
101
102extern u_char at_org_code[3];
103extern u_char aarp_org_code[3];
104#endif /* NETATALK */
105
106/* netgraph node hooks for ng_ether(4) */
107void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
108void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
109int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
110void (*ng_ether_attach_p)(struct ifnet *ifp);
111void (*ng_ether_detach_p)(struct ifnet *ifp);
112
113void (*vlan_input_p)(struct ifnet *, struct mbuf *);
114
115/* bridge support */
116int do_bridge;
117bridge_in_t *bridge_in_ptr;
118bdg_forward_t *bdg_forward_ptr;
119bdgtakeifaces_t *bdgtakeifaces_ptr;
120struct bdg_softc *ifp2sc;
121
122static int ether_resolvemulti(struct ifnet *, struct sockaddr **,
123 struct sockaddr *);
124u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
125#define senderr(e) do { error = (e); goto bad;} while (0)
126#define IFP2AC(IFP) ((struct arpcom *)IFP)
127
128int
129ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst,
130 struct ip_fw **rule, int shared);
131static int ether_ipfw;
132
133/*
134 * Ethernet output routine.
135 * Encapsulate a packet of type family for the local net.
136 * Use trailer local net encapsulation if enough data in first
137 * packet leaves a multiple of 512 bytes of data in remainder.
138 * Assumes that ifp is actually pointer to arpcom structure.
139 */
140int
141ether_output(ifp, m, dst, rt0)
142 register struct ifnet *ifp;
143 struct mbuf *m;
144 struct sockaddr *dst;
145 struct rtentry *rt0;
146{
147 short type;
148 int error = 0, hdrcmplt = 0;
149 u_char esrc[6], edst[6];
150 register struct rtentry *rt;
151 register struct ether_header *eh;
152 int loop_copy = 0;
153 int hlen; /* link layer header lenght */
154 struct arpcom *ac = IFP2AC(ifp);
155
156#ifdef MAC
157 error = mac_check_ifnet_transmit(ifp, m);
158 if (error)
159 senderr(error);
160#endif
161
162 if (ifp->if_flags & IFF_MONITOR)
163 senderr(ENETDOWN);
164 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
165 senderr(ENETDOWN);
166 rt = rt0;
167 if (rt) {
168 if ((rt->rt_flags & RTF_UP) == 0) {
169 rt0 = rt = rtalloc1(dst, 1, 0UL);
170 if (rt0)
171 rt->rt_refcnt--;
172 else
173 senderr(EHOSTUNREACH);
174 }
175 if (rt->rt_flags & RTF_GATEWAY) {
176 if (rt->rt_gwroute == 0)
177 goto lookup;
178 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
179 rtfree(rt); rt = rt0;
180 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1,
181 0UL);
182 if ((rt = rt->rt_gwroute) == 0)
183 senderr(EHOSTUNREACH);
184 }
185 }
186 if (rt->rt_flags & RTF_REJECT)
187 if (rt->rt_rmx.rmx_expire == 0 ||
188 time_second < rt->rt_rmx.rmx_expire)
189 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
190 }
191 hlen = ETHER_HDR_LEN;
192 switch (dst->sa_family) {
193#ifdef INET
194 case AF_INET:
195 if (!arpresolve(ifp, rt, m, dst, edst, rt0))
196 return (0); /* if not yet resolved */
197 type = htons(ETHERTYPE_IP);
198 break;
199#endif
200#ifdef INET6
201 case AF_INET6:
202 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) {
203 /* Something bad happened */
204 return(0);
205 }
206 type = htons(ETHERTYPE_IPV6);
207 break;
208#endif
209#ifdef IPX
210 case AF_IPX:
211 if (ef_outputp) {
212 error = ef_outputp(ifp, &m, dst, &type, &hlen);
213 if (error)
214 goto bad;
215 } else
216 type = htons(ETHERTYPE_IPX);
217 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
218 (caddr_t)edst, sizeof (edst));
219 break;
220#endif
221#ifdef NETATALK
222 case AF_APPLETALK:
223 {
224 struct at_ifaddr *aa;
225
226 if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) {
227 goto bad;
228 }
229 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
230 return (0);
231 /*
232 * In the phase 2 case, need to prepend an mbuf for the llc header.
233 * Since we must preserve the value of m, which is passed to us by
234 * value, we m_copy() the first mbuf, and use it for our llc header.
235 */
236 if ( aa->aa_flags & AFA_PHASE2 ) {
237 struct llc llc;
238
239 M_PREPEND(m, sizeof(struct llc), M_TRYWAIT);
240 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
241 llc.llc_control = LLC_UI;
242 bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
243 llc.llc_snap_ether_type = htons( ETHERTYPE_AT );
244 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
245 type = htons(m->m_pkthdr.len);
246 hlen = sizeof(struct llc) + ETHER_HDR_LEN;
247 } else {
248 type = htons(ETHERTYPE_AT);
249 }
250 break;
251 }
252#endif /* NETATALK */
253#ifdef NS
254 case AF_NS:
255 switch(ns_nettype){
256 default:
257 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
258 type = 0x8137;
259 break;
260 case 0x0: /* Novell 802.3 */
261 type = htons( m->m_pkthdr.len);
262 break;
263 case 0xe0e0: /* Novell 802.2 and Token-Ring */
264 M_PREPEND(m, 3, M_TRYWAIT);
265 type = htons( m->m_pkthdr.len);
266 cp = mtod(m, u_char *);
267 *cp++ = 0xE0;
268 *cp++ = 0xE0;
269 *cp++ = 0x03;
270 break;
271 }
272 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
273 (caddr_t)edst, sizeof (edst));
274 /*
275 * XXX if ns_thishost is the same as the node's ethernet
276 * address then just the default code will catch this anyhow.
277 * So I'm not sure if this next clause should be here at all?
278 * [JRE]
279 */
280 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))){
281 m->m_pkthdr.rcvif = ifp;
282 inq = &nsintrq;
283 if (IF_HANDOFF(inq, m, NULL))
284 schednetisr(NETISR_NS);
285 return (error);
286 }
287 if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, sizeof(edst))){
288 m->m_flags |= M_BCAST;
289 }
290 break;
291#endif /* NS */
292
293 case pseudo_AF_HDRCMPLT:
294 hdrcmplt = 1;
295 eh = (struct ether_header *)dst->sa_data;
296 (void)memcpy(esrc, eh->ether_shost, sizeof (esrc));
297 /* FALLTHROUGH */
298
299 case AF_UNSPEC:
300 loop_copy = -1; /* if this is for us, don't do it */
301 eh = (struct ether_header *)dst->sa_data;
302 (void)memcpy(edst, eh->ether_dhost, sizeof (edst));
303 type = eh->ether_type;
304 break;
305
306 default:
307 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
308 senderr(EAFNOSUPPORT);
309 }
310
311 /*
312 * Add local net header. If no space in first mbuf,
313 * allocate another.
314 */
315 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
316 if (m == 0)
317 senderr(ENOBUFS);
318 eh = mtod(m, struct ether_header *);
319 (void)memcpy(&eh->ether_type, &type,
320 sizeof(eh->ether_type));
321 (void)memcpy(eh->ether_dhost, edst, sizeof (edst));
322 if (hdrcmplt)
323 (void)memcpy(eh->ether_shost, esrc,
324 sizeof(eh->ether_shost));
325 else
326 (void)memcpy(eh->ether_shost, ac->ac_enaddr,
327 sizeof(eh->ether_shost));
328
329 /*
330 * If a simplex interface, and the packet is being sent to our
331 * Ethernet address or a broadcast address, loopback a copy.
332 * XXX To make a simplex device behave exactly like a duplex
333 * device, we should copy in the case of sending to our own
334 * ethernet address (thus letting the original actually appear
335 * on the wire). However, we don't do that here for security
336 * reasons and compatibility with the original behavior.
337 */
338 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
339 int csum_flags = 0;
340
341 if (m->m_pkthdr.csum_flags & CSUM_IP)
342 csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID);
343 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
344 csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR);
345 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
346 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
347
348 n->m_pkthdr.csum_flags |= csum_flags;
349 if (csum_flags & CSUM_DATA_VALID)
350 n->m_pkthdr.csum_data = 0xffff;
351
352 (void) if_simloop(ifp, n, dst->sa_family, hlen);
353 } else if (bcmp(eh->ether_dhost,
354 eh->ether_shost, ETHER_ADDR_LEN) == 0) {
355 m->m_pkthdr.csum_flags |= csum_flags;
356 if (csum_flags & CSUM_DATA_VALID)
357 m->m_pkthdr.csum_data = 0xffff;
358 (void) if_simloop(ifp, m, dst->sa_family, hlen);
359 return (0); /* XXX */
360 }
361 }
362
363 /* Handle ng_ether(4) processing, if any */
364 if (ng_ether_output_p != NULL) {
365 if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) {
366bad: if (m != NULL)
367 m_freem(m);
368 return (error);
369 }
370 if (m == NULL)
371 return (0);
372 }
373
374 /* Continue with link-layer output */
375 return ether_output_frame(ifp, m);
376}
377
378/*
379 * Ethernet link layer output routine to send a raw frame to the device.
380 *
381 * This assumes that the 14 byte Ethernet header is present and contiguous
382 * in the first mbuf (if BRIDGE'ing).
383 */
384int
385ether_output_frame(struct ifnet *ifp, struct mbuf *m)
386{
387 struct ip_fw *rule = NULL;
388
389 /* Extract info from dummynet tag, ignore others */
390 for (; m->m_type == MT_TAG; m = m->m_next)
391 if (m->m_flags == PACKET_TAG_DUMMYNET)
392 rule = ((struct dn_pkt *)m)->rule;
393
394 if (rule == NULL && BDG_ACTIVE(ifp)) {
395 /*
396 * Beware, the bridge code notices the null rcvif and
397 * uses that identify that it's being called from
398 * ether_output as opposd to ether_input. Yech.
399 */
400 m->m_pkthdr.rcvif = NULL;
401 m = bdg_forward_ptr(m, ifp);
402 if (m != NULL)
403 m_freem(m);
404 return (0);
405 }
406 if (IPFW_LOADED && ether_ipfw != 0) {
407 if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) {
408 if (m) {
409 m_freem(m);
410 return ENOBUFS; /* pkt dropped */
411 } else
412 return 0; /* consumed e.g. in a pipe */
413 }
414 }
415
416 /*
417 * Queue message on interface, update output statistics if
418 * successful, and start output if interface not yet active.
419 */
420 return (IF_HANDOFF(&ifp->if_snd, m, ifp) ? 0 : ENOBUFS);
421}
422
423/*
424 * ipfw processing for ethernet packets (in and out).
425 * The second parameter is NULL from ether_demux, and ifp from
426 * ether_output_frame. This section of code could be used from
427 * bridge.c as well as long as we use some extra info
428 * to distinguish that case from ether_output_frame();
429 */
430int
431ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst,
432 struct ip_fw **rule, int shared)
433{
434 struct ether_header *eh;
435 struct ether_header save_eh;
436 struct mbuf *m;
437 int i;
438 struct ip_fw_args args;
439
440 if (*rule != NULL && fw_one_pass)
441 return 1; /* dummynet packet, already partially processed */
442
443 /*
444 * I need some amt of data to be contiguous, and in case others need
445 * the packet (shared==1) also better be in the first mbuf.
446 */
447 m = *m0;
448 i = min( m->m_pkthdr.len, max_protohdr);
449 if ( shared || m->m_len < i) {
450 m = m_pullup(m, i);
451 if (m == NULL) {
452 *m0 = m;
453 return 0;
454 }
455 }
456 eh = mtod(m, struct ether_header *);
457 save_eh = *eh; /* save copy for restore below */
458 m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */
459
460 args.m = m; /* the packet we are looking at */
461 args.oif = dst; /* destination, if any */
462 args.divert_rule = 0; /* we do not support divert yet */
463 args.rule = *rule; /* matching rule to restart */
464 args.next_hop = NULL; /* we do not support forward yet */
465 args.eh = &save_eh; /* MAC header for bridged/MAC packets */
466 i = ip_fw_chk_ptr(&args);
467 m = args.m;
468 if (m != NULL) {
469 /*
470 * Restore Ethernet header, as needed, in case the
471 * mbuf chain was replaced by ipfw.
472 */
|
473 M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT);
| 473 M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT);
|
474 if (m == NULL) {
475 *m0 = m;
476 return 0;
477 }
478 if (eh != mtod(m, struct ether_header *))
479 bcopy(&save_eh, mtod(m, struct ether_header *),
480 ETHER_HDR_LEN);
481 }
482 *m0 = m;
483 *rule = args.rule;
484
485 if ( (i & IP_FW_PORT_DENY_FLAG) || m == NULL) /* drop */
486 return 0;
487
488 if (i == 0) /* a PASS rule. */
489 return 1;
490
491 if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG)) {
492 /*
493 * Pass the pkt to dummynet, which consumes it.
494 * If shared, make a copy and keep the original.
495 */
496 if (shared) {
497 m = m_copypacket(m, M_DONTWAIT);
498 if (m == NULL)
499 return 0;
500 } else {
501 /*
502 * Pass the original to dummynet and
503 * nothing back to the caller
504 */
505 *m0 = NULL ;
506 }
507 ip_dn_io_ptr(m, (i & 0xffff),
508 dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args);
509 return 0;
510 }
511 /*
512 * XXX at some point add support for divert/forward actions.
513 * If none of the above matches, we have to drop the pkt.
514 */
515 return 0;
516}
517
518/*
519 * Process a received Ethernet packet; the packet is in the
520 * mbuf chain m with the ethernet header at the front.
521 */
522static void
523ether_input(struct ifnet *ifp, struct mbuf *m)
524{
525 struct ether_header *eh;
526 u_short etype;
527
528 /*
529 * Do consistency checks to verify assumptions
530 * made by code past this point.
531 */
532 if ((m->m_flags & M_PKTHDR) == 0) {
533 if_printf(ifp, "discard frame w/o packet header\n");
534 ifp->if_ierrors++;
535 m_freem(m);
536 return;
537 }
538 if (m->m_len < sizeof (struct ether_header)) {
539 /* XXX maybe should pullup? */
540 if_printf(ifp, "discard frame w/o leading ethernet "
541 "header (len %u pkt len %u)\n",
542 m->m_len, m->m_pkthdr.len);
543 ifp->if_ierrors++;
544 m_freem(m);
545 return;
546 }
547 eh = mtod(m, struct ether_header *);
548 etype = ntohs(eh->ether_type);
549 if (m->m_pkthdr.len >
550 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) {
551 if_printf(ifp, "discard oversize frame "
552 "(ether type %x flags %x len %u > max %lu)\n",
553 etype, m->m_flags, m->m_pkthdr.len,
554 ETHER_MAX_FRAME(ifp, etype,
555 m->m_flags & M_HASFCS));
556 ifp->if_ierrors++;
557 m_freem(m);
558 return;
559 }
560 if (m->m_pkthdr.rcvif == NULL) {
561 if_printf(ifp, "discard frame w/o interface pointer\n");
562 ifp->if_ierrors++;
563 m_freem(m);
564 return;
565 }
566#ifdef DIAGNOSTIC
567 if (m->m_pkthdr.rcvif != ifp) {
568 if_printf(ifp, "Warning, frame marked as received on %s%u\n",
569 m->m_pkthdr.rcvif->if_name,
570 m->m_pkthdr.rcvif->if_unit);
571 }
572#endif
573
574 /*
575 * Give bpf a chance at the packet.
576 */
577 BPF_MTAP(ifp, m);
578
579 if (ifp->if_flags & IFF_MONITOR) {
580 /*
581 * Interface marked for monitoring; discard packet.
582 */
583 m_freem(m);
584 return;
585 }
586
587 /* If the CRC is still on the packet, trim it off. */
588 if (m->m_flags & M_HASFCS) {
589 m_adj(m, -ETHER_CRC_LEN);
590 m->m_flags &= ~M_HASFCS;
591 }
592
593#ifdef MAC
594 mac_create_mbuf_from_ifnet(ifp, m);
595#endif
596
597 ifp->if_ibytes += m->m_pkthdr.len;
598
599 /* Handle ng_ether(4) processing, if any */
600 if (ng_ether_input_p != NULL) {
601 (*ng_ether_input_p)(ifp, &m);
602 if (m == NULL)
603 return;
604 }
605
606 /* Check for bridging mode */
607 if (BDG_ACTIVE(ifp) ) {
608 struct ifnet *bif;
609
610 /*
611 * Check with bridging code to see how the packet
612 * should be handled. Possibilities are:
613 *
614 * BDG_BCAST broadcast
615 * BDG_MCAST multicast
616 * BDG_LOCAL for local address, don't forward
617 * BDG_DROP discard
618 * ifp forward only to specified interface(s)
619 *
620 * Non-local destinations are handled by passing the
621 * packet back to the bridge code.
622 */
623 bif = bridge_in_ptr(ifp, eh);
624 if (bif == BDG_DROP) { /* discard packet */
625 m_freem(m);
626 return;
627 }
628 if (bif != BDG_LOCAL) { /* non-local, forward */
629 m = bdg_forward_ptr(m, bif);
630 /*
631 * The bridge may consume the packet if it's not
632 * supposed to be passed up or if a problem occurred
633 * while doing its job. This is reflected by it
634 * returning a NULL mbuf pointer.
635 */
636 if (m == NULL) {
637 if (bif == BDG_BCAST || bif == BDG_MCAST)
638 if_printf(ifp,
639 "bridge dropped %s packet\n",
640 bif == BDG_BCAST ? "broadcast" :
641 "multicast");
642 return;
643 }
644 /*
645 * But in some cases the bridge may return the
646 * packet for us to free; sigh.
647 */
648 if (bif != BDG_BCAST && bif != BDG_MCAST) {
649printf("ether_input: drop bdg packet, bif %p\n", bif);/*XXX*/
650 m_freem(m);
651 return;
652 }
653 }
654 }
655
656 ether_demux(ifp, m);
657 /* First chunk of an mbuf contains good entropy */
658 if (harvest.ethernet)
659 random_harvest(m, 16, 3, 0, RANDOM_NET);
660}
661
662/*
663 * Upper layer processing for a received Ethernet packet.
664 */
665void
666ether_demux(struct ifnet *ifp, struct mbuf *m)
667{
668 struct ether_header *eh;
669 struct ifqueue *inq;
670 u_short ether_type;
671#if defined(NETATALK)
672 register struct llc *l;
673#endif
674 struct ip_fw *rule = NULL;
675
676 /* Extract info from dummynet tag, ignore others */
677 for (;m->m_type == MT_TAG; m = m->m_next)
678 if (m->m_flags == PACKET_TAG_DUMMYNET) {
679 rule = ((struct dn_pkt *)m)->rule;
680 ifp = m->m_next->m_pkthdr.rcvif;
681 }
682
683 KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer"));
684
685 eh = mtod(m, struct ether_header *);
686
687 if (rule) /* packet was already bridged */
688 goto post_stats;
689
690 if (!(BDG_ACTIVE(ifp))) {
691 /*
692 * Discard packet if upper layers shouldn't see it because it
693 * was unicast to a different Ethernet address. If the driver
694 * is working properly, then this situation can only happen
695 * when the interface is in promiscuous mode.
696 */
697 if ((ifp->if_flags & IFF_PROMISC) != 0
698 && (eh->ether_dhost[0] & 1) == 0
699 && bcmp(eh->ether_dhost,
700 IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0
701 && (ifp->if_flags & IFF_PPROMISC) == 0) {
702 m_freem(m);
703 return;
704 }
705 }
706
707 /* Discard packet if interface is not up */
708 if ((ifp->if_flags & IFF_UP) == 0) {
709 m_freem(m);
710 return;
711 }
712 if (eh->ether_dhost[0] & 1) {
713 if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
714 sizeof(etherbroadcastaddr)) == 0)
715 m->m_flags |= M_BCAST;
716 else
717 m->m_flags |= M_MCAST;
718 }
719 if (m->m_flags & (M_BCAST|M_MCAST))
720 ifp->if_imcasts++;
721
722post_stats:
723 if (IPFW_LOADED && ether_ipfw != 0) {
724 if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) {
725 if (m)
726 m_freem(m);
727 return;
728 }
729 }
730
731 /*
732 * If VLANs are configured on the interface, check to
733 * see if the device performed the decapsulation and
734 * provided us with the tag.
735 */
736 if (ifp->if_nvlans &&
737 m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL) != NULL) {
738 /*
739 * vlan_input() will either recursively call ether_input()
740 * or drop the packet.
741 */
742 KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!"));
743 (*vlan_input_p)(ifp, m);
744 return;
745 }
746
747 ether_type = ntohs(eh->ether_type);
748
749 /*
750 * Handle protocols that expect to have the Ethernet header
751 * (and possibly FCS) intact.
752 */
753 switch (ether_type) {
754 case ETHERTYPE_VLAN:
755 if (ifp->if_nvlans != 0) {
756 KASSERT(vlan_input_p,("ether_input: VLAN not loaded!"));
757 (*vlan_input_p)(ifp, m);
758 } else {
759 ifp->if_noproto++;
760 m_freem(m);
761 }
762 return;
763 }
764
765 /* Strip off Ethernet header. */
766 m_adj(m, sizeof (struct ether_header));
767
768 /* If the CRC is still on the packet, trim it off. */
769 if (m->m_flags & M_HASFCS) {
770 m_adj(m, -ETHER_CRC_LEN);
771 m->m_flags &= ~M_HASFCS;
772 }
773
774 switch (ether_type) {
775#ifdef INET
776 case ETHERTYPE_IP:
777 if (ipflow_fastforward(m))
778 return;
779 schednetisr(NETISR_IP);
780 inq = &ipintrq;
781 break;
782
783 case ETHERTYPE_ARP:
784 if (ifp->if_flags & IFF_NOARP) {
785 /* Discard packet if ARP is disabled on interface */
786 m_freem(m);
787 return;
788 }
789 schednetisr(NETISR_ARP);
790 inq = &arpintrq;
791 break;
792#endif
793#ifdef IPX
794 case ETHERTYPE_IPX:
795 if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
796 return;
797 schednetisr(NETISR_IPX);
798 inq = &ipxintrq;
799 break;
800#endif
801#ifdef INET6
802 case ETHERTYPE_IPV6:
803 schednetisr(NETISR_IPV6);
804 inq = &ip6intrq;
805 break;
806#endif
807#ifdef NS
808 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
809 schednetisr(NETISR_NS);
810 inq = &nsintrq;
811 break;
812
813#endif /* NS */
814#ifdef NETATALK
815 case ETHERTYPE_AT:
816 schednetisr(NETISR_ATALK);
817 inq = &atintrq1;
818 break;
819 case ETHERTYPE_AARP:
820 /* probably this should be done with a NETISR as well */
821 aarpinput(IFP2AC(ifp), m); /* XXX */
822 return;
823#endif /* NETATALK */
824 default:
825#ifdef IPX
826 if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
827 return;
828#endif /* IPX */
829#ifdef NS
830 checksum = mtod(m, ushort *);
831 /* Novell 802.3 */
832 if ((ether_type <= ETHERMTU) &&
833 ((*checksum == 0xffff) || (*checksum == 0xE0E0))){
834 if(*checksum == 0xE0E0) {
835 m->m_pkthdr.len -= 3;
836 m->m_len -= 3;
837 m->m_data += 3;
838 }
839 schednetisr(NETISR_NS);
840 inq = &nsintrq;
841 break;
842 }
843#endif /* NS */
844#if defined(NETATALK)
845 if (ether_type > ETHERMTU)
846 goto discard;
847 l = mtod(m, struct llc *);
848 switch (l->llc_dsap) {
849 case LLC_SNAP_LSAP:
850 switch (l->llc_control) {
851 case LLC_UI:
852 if (l->llc_ssap != LLC_SNAP_LSAP)
853 goto discard;
854
855 if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code,
856 sizeof(at_org_code)) == 0 &&
857 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
858 inq = &atintrq2;
859 m_adj( m, sizeof( struct llc ));
860 schednetisr(NETISR_ATALK);
861 break;
862 }
863
864 if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
865 sizeof(aarp_org_code)) == 0 &&
866 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
867 m_adj( m, sizeof( struct llc ));
868 aarpinput(IFP2AC(ifp), m); /* XXX */
869 return;
870 }
871
872 default:
873 goto discard;
874 }
875 break;
876 default:
877 goto discard;
878 }
879#else /* NETATALK */
880 goto discard;
881#endif /* NETATALK */
882 }
883
884 (void) IF_HANDOFF(inq, m, NULL);
885 return;
886discard:
887 /*
888 * Packet is to be discarded. If netgraph is present,
889 * hand the packet to it for last chance processing;
890 * otherwise dispose of it.
891 */
892 if (ng_ether_input_orphan_p != NULL) {
893 /*
894 * Put back the ethernet header so netgraph has a
895 * consistent view of inbound packets.
896 */
| 474 if (m == NULL) {
475 *m0 = m;
476 return 0;
477 }
478 if (eh != mtod(m, struct ether_header *))
479 bcopy(&save_eh, mtod(m, struct ether_header *),
480 ETHER_HDR_LEN);
481 }
482 *m0 = m;
483 *rule = args.rule;
484
485 if ( (i & IP_FW_PORT_DENY_FLAG) || m == NULL) /* drop */
486 return 0;
487
488 if (i == 0) /* a PASS rule. */
489 return 1;
490
491 if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG)) {
492 /*
493 * Pass the pkt to dummynet, which consumes it.
494 * If shared, make a copy and keep the original.
495 */
496 if (shared) {
497 m = m_copypacket(m, M_DONTWAIT);
498 if (m == NULL)
499 return 0;
500 } else {
501 /*
502 * Pass the original to dummynet and
503 * nothing back to the caller
504 */
505 *m0 = NULL ;
506 }
507 ip_dn_io_ptr(m, (i & 0xffff),
508 dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args);
509 return 0;
510 }
511 /*
512 * XXX at some point add support for divert/forward actions.
513 * If none of the above matches, we have to drop the pkt.
514 */
515 return 0;
516}
517
518/*
519 * Process a received Ethernet packet; the packet is in the
520 * mbuf chain m with the ethernet header at the front.
521 */
522static void
523ether_input(struct ifnet *ifp, struct mbuf *m)
524{
525 struct ether_header *eh;
526 u_short etype;
527
528 /*
529 * Do consistency checks to verify assumptions
530 * made by code past this point.
531 */
532 if ((m->m_flags & M_PKTHDR) == 0) {
533 if_printf(ifp, "discard frame w/o packet header\n");
534 ifp->if_ierrors++;
535 m_freem(m);
536 return;
537 }
538 if (m->m_len < sizeof (struct ether_header)) {
539 /* XXX maybe should pullup? */
540 if_printf(ifp, "discard frame w/o leading ethernet "
541 "header (len %u pkt len %u)\n",
542 m->m_len, m->m_pkthdr.len);
543 ifp->if_ierrors++;
544 m_freem(m);
545 return;
546 }
547 eh = mtod(m, struct ether_header *);
548 etype = ntohs(eh->ether_type);
549 if (m->m_pkthdr.len >
550 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) {
551 if_printf(ifp, "discard oversize frame "
552 "(ether type %x flags %x len %u > max %lu)\n",
553 etype, m->m_flags, m->m_pkthdr.len,
554 ETHER_MAX_FRAME(ifp, etype,
555 m->m_flags & M_HASFCS));
556 ifp->if_ierrors++;
557 m_freem(m);
558 return;
559 }
560 if (m->m_pkthdr.rcvif == NULL) {
561 if_printf(ifp, "discard frame w/o interface pointer\n");
562 ifp->if_ierrors++;
563 m_freem(m);
564 return;
565 }
566#ifdef DIAGNOSTIC
567 if (m->m_pkthdr.rcvif != ifp) {
568 if_printf(ifp, "Warning, frame marked as received on %s%u\n",
569 m->m_pkthdr.rcvif->if_name,
570 m->m_pkthdr.rcvif->if_unit);
571 }
572#endif
573
574 /*
575 * Give bpf a chance at the packet.
576 */
577 BPF_MTAP(ifp, m);
578
579 if (ifp->if_flags & IFF_MONITOR) {
580 /*
581 * Interface marked for monitoring; discard packet.
582 */
583 m_freem(m);
584 return;
585 }
586
587 /* If the CRC is still on the packet, trim it off. */
588 if (m->m_flags & M_HASFCS) {
589 m_adj(m, -ETHER_CRC_LEN);
590 m->m_flags &= ~M_HASFCS;
591 }
592
593#ifdef MAC
594 mac_create_mbuf_from_ifnet(ifp, m);
595#endif
596
597 ifp->if_ibytes += m->m_pkthdr.len;
598
599 /* Handle ng_ether(4) processing, if any */
600 if (ng_ether_input_p != NULL) {
601 (*ng_ether_input_p)(ifp, &m);
602 if (m == NULL)
603 return;
604 }
605
606 /* Check for bridging mode */
607 if (BDG_ACTIVE(ifp) ) {
608 struct ifnet *bif;
609
610 /*
611 * Check with bridging code to see how the packet
612 * should be handled. Possibilities are:
613 *
614 * BDG_BCAST broadcast
615 * BDG_MCAST multicast
616 * BDG_LOCAL for local address, don't forward
617 * BDG_DROP discard
618 * ifp forward only to specified interface(s)
619 *
620 * Non-local destinations are handled by passing the
621 * packet back to the bridge code.
622 */
623 bif = bridge_in_ptr(ifp, eh);
624 if (bif == BDG_DROP) { /* discard packet */
625 m_freem(m);
626 return;
627 }
628 if (bif != BDG_LOCAL) { /* non-local, forward */
629 m = bdg_forward_ptr(m, bif);
630 /*
631 * The bridge may consume the packet if it's not
632 * supposed to be passed up or if a problem occurred
633 * while doing its job. This is reflected by it
634 * returning a NULL mbuf pointer.
635 */
636 if (m == NULL) {
637 if (bif == BDG_BCAST || bif == BDG_MCAST)
638 if_printf(ifp,
639 "bridge dropped %s packet\n",
640 bif == BDG_BCAST ? "broadcast" :
641 "multicast");
642 return;
643 }
644 /*
645 * But in some cases the bridge may return the
646 * packet for us to free; sigh.
647 */
648 if (bif != BDG_BCAST && bif != BDG_MCAST) {
649printf("ether_input: drop bdg packet, bif %p\n", bif);/*XXX*/
650 m_freem(m);
651 return;
652 }
653 }
654 }
655
656 ether_demux(ifp, m);
657 /* First chunk of an mbuf contains good entropy */
658 if (harvest.ethernet)
659 random_harvest(m, 16, 3, 0, RANDOM_NET);
660}
661
662/*
663 * Upper layer processing for a received Ethernet packet.
664 */
665void
666ether_demux(struct ifnet *ifp, struct mbuf *m)
667{
668 struct ether_header *eh;
669 struct ifqueue *inq;
670 u_short ether_type;
671#if defined(NETATALK)
672 register struct llc *l;
673#endif
674 struct ip_fw *rule = NULL;
675
676 /* Extract info from dummynet tag, ignore others */
677 for (;m->m_type == MT_TAG; m = m->m_next)
678 if (m->m_flags == PACKET_TAG_DUMMYNET) {
679 rule = ((struct dn_pkt *)m)->rule;
680 ifp = m->m_next->m_pkthdr.rcvif;
681 }
682
683 KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer"));
684
685 eh = mtod(m, struct ether_header *);
686
687 if (rule) /* packet was already bridged */
688 goto post_stats;
689
690 if (!(BDG_ACTIVE(ifp))) {
691 /*
692 * Discard packet if upper layers shouldn't see it because it
693 * was unicast to a different Ethernet address. If the driver
694 * is working properly, then this situation can only happen
695 * when the interface is in promiscuous mode.
696 */
697 if ((ifp->if_flags & IFF_PROMISC) != 0
698 && (eh->ether_dhost[0] & 1) == 0
699 && bcmp(eh->ether_dhost,
700 IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0
701 && (ifp->if_flags & IFF_PPROMISC) == 0) {
702 m_freem(m);
703 return;
704 }
705 }
706
707 /* Discard packet if interface is not up */
708 if ((ifp->if_flags & IFF_UP) == 0) {
709 m_freem(m);
710 return;
711 }
712 if (eh->ether_dhost[0] & 1) {
713 if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
714 sizeof(etherbroadcastaddr)) == 0)
715 m->m_flags |= M_BCAST;
716 else
717 m->m_flags |= M_MCAST;
718 }
719 if (m->m_flags & (M_BCAST|M_MCAST))
720 ifp->if_imcasts++;
721
722post_stats:
723 if (IPFW_LOADED && ether_ipfw != 0) {
724 if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) {
725 if (m)
726 m_freem(m);
727 return;
728 }
729 }
730
731 /*
732 * If VLANs are configured on the interface, check to
733 * see if the device performed the decapsulation and
734 * provided us with the tag.
735 */
736 if (ifp->if_nvlans &&
737 m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL) != NULL) {
738 /*
739 * vlan_input() will either recursively call ether_input()
740 * or drop the packet.
741 */
742 KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!"));
743 (*vlan_input_p)(ifp, m);
744 return;
745 }
746
747 ether_type = ntohs(eh->ether_type);
748
749 /*
750 * Handle protocols that expect to have the Ethernet header
751 * (and possibly FCS) intact.
752 */
753 switch (ether_type) {
754 case ETHERTYPE_VLAN:
755 if (ifp->if_nvlans != 0) {
756 KASSERT(vlan_input_p,("ether_input: VLAN not loaded!"));
757 (*vlan_input_p)(ifp, m);
758 } else {
759 ifp->if_noproto++;
760 m_freem(m);
761 }
762 return;
763 }
764
765 /* Strip off Ethernet header. */
766 m_adj(m, sizeof (struct ether_header));
767
768 /* If the CRC is still on the packet, trim it off. */
769 if (m->m_flags & M_HASFCS) {
770 m_adj(m, -ETHER_CRC_LEN);
771 m->m_flags &= ~M_HASFCS;
772 }
773
774 switch (ether_type) {
775#ifdef INET
776 case ETHERTYPE_IP:
777 if (ipflow_fastforward(m))
778 return;
779 schednetisr(NETISR_IP);
780 inq = &ipintrq;
781 break;
782
783 case ETHERTYPE_ARP:
784 if (ifp->if_flags & IFF_NOARP) {
785 /* Discard packet if ARP is disabled on interface */
786 m_freem(m);
787 return;
788 }
789 schednetisr(NETISR_ARP);
790 inq = &arpintrq;
791 break;
792#endif
793#ifdef IPX
794 case ETHERTYPE_IPX:
795 if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
796 return;
797 schednetisr(NETISR_IPX);
798 inq = &ipxintrq;
799 break;
800#endif
801#ifdef INET6
802 case ETHERTYPE_IPV6:
803 schednetisr(NETISR_IPV6);
804 inq = &ip6intrq;
805 break;
806#endif
807#ifdef NS
808 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
809 schednetisr(NETISR_NS);
810 inq = &nsintrq;
811 break;
812
813#endif /* NS */
814#ifdef NETATALK
815 case ETHERTYPE_AT:
816 schednetisr(NETISR_ATALK);
817 inq = &atintrq1;
818 break;
819 case ETHERTYPE_AARP:
820 /* probably this should be done with a NETISR as well */
821 aarpinput(IFP2AC(ifp), m); /* XXX */
822 return;
823#endif /* NETATALK */
824 default:
825#ifdef IPX
826 if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
827 return;
828#endif /* IPX */
829#ifdef NS
830 checksum = mtod(m, ushort *);
831 /* Novell 802.3 */
832 if ((ether_type <= ETHERMTU) &&
833 ((*checksum == 0xffff) || (*checksum == 0xE0E0))){
834 if(*checksum == 0xE0E0) {
835 m->m_pkthdr.len -= 3;
836 m->m_len -= 3;
837 m->m_data += 3;
838 }
839 schednetisr(NETISR_NS);
840 inq = &nsintrq;
841 break;
842 }
843#endif /* NS */
844#if defined(NETATALK)
845 if (ether_type > ETHERMTU)
846 goto discard;
847 l = mtod(m, struct llc *);
848 switch (l->llc_dsap) {
849 case LLC_SNAP_LSAP:
850 switch (l->llc_control) {
851 case LLC_UI:
852 if (l->llc_ssap != LLC_SNAP_LSAP)
853 goto discard;
854
855 if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code,
856 sizeof(at_org_code)) == 0 &&
857 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
858 inq = &atintrq2;
859 m_adj( m, sizeof( struct llc ));
860 schednetisr(NETISR_ATALK);
861 break;
862 }
863
864 if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
865 sizeof(aarp_org_code)) == 0 &&
866 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
867 m_adj( m, sizeof( struct llc ));
868 aarpinput(IFP2AC(ifp), m); /* XXX */
869 return;
870 }
871
872 default:
873 goto discard;
874 }
875 break;
876 default:
877 goto discard;
878 }
879#else /* NETATALK */
880 goto discard;
881#endif /* NETATALK */
882 }
883
884 (void) IF_HANDOFF(inq, m, NULL);
885 return;
886discard:
887 /*
888 * Packet is to be discarded. If netgraph is present,
889 * hand the packet to it for last chance processing;
890 * otherwise dispose of it.
891 */
892 if (ng_ether_input_orphan_p != NULL) {
893 /*
894 * Put back the ethernet header so netgraph has a
895 * consistent view of inbound packets.
896 */
|
897 M_PREPEND(m, sizeof (struct ether_header), M_NOWAIT);
| 897 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
|
898 (*ng_ether_input_orphan_p)(ifp, m);
899 return;
900 }
901 m_freem(m);
902}
903
904/*
905 * Convert Ethernet address to printable (loggable) representation.
906 * This routine is for compatibility; it's better to just use
907 *
908 * printf("%6D", <pointer to address>, ":");
909 *
910 * since there's no static buffer involved.
911 */
912char *
913ether_sprintf(const u_char *ap)
914{
915 static char etherbuf[18];
916 snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":");
917 return (etherbuf);
918}
919
920/*
921 * Perform common duties while attaching to interface list
922 */
923void
924ether_ifattach(struct ifnet *ifp, const u_int8_t *llc)
925{
926 register struct ifaddr *ifa;
927 register struct sockaddr_dl *sdl;
928
929 ifp->if_type = IFT_ETHER;
930 ifp->if_addrlen = ETHER_ADDR_LEN;
931 ifp->if_hdrlen = ETHER_HDR_LEN;
932 if_attach(ifp);
933 ifp->if_mtu = ETHERMTU;
934 ifp->if_output = ether_output;
935 ifp->if_input = ether_input;
936 ifp->if_resolvemulti = ether_resolvemulti;
937 if (ifp->if_baudrate == 0)
938 ifp->if_baudrate = IF_Mbps(10); /* just a default */
939 ifp->if_broadcastaddr = etherbroadcastaddr;
940
941 ifa = ifaddr_byindex(ifp->if_index);
942 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
943 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
944 sdl->sdl_type = IFT_ETHER;
945 sdl->sdl_alen = ifp->if_addrlen;
946 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
947 /*
948 * XXX: This doesn't belong here; we do it until
949 * XXX: all drivers are cleaned up
950 */
951 if (llc != IFP2AC(ifp)->ac_enaddr)
952 bcopy(llc, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen);
953
954 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
955 if (ng_ether_attach_p != NULL)
956 (*ng_ether_attach_p)(ifp);
957 if (BDG_LOADED)
958 bdgtakeifaces_ptr();
959}
960
961/*
962 * Perform common duties while detaching an Ethernet interface
963 */
964void
965ether_ifdetach(struct ifnet *ifp)
966{
967 if (ng_ether_detach_p != NULL)
968 (*ng_ether_detach_p)(ifp);
969 bpfdetach(ifp);
970 if_detach(ifp);
971 if (BDG_LOADED)
972 bdgtakeifaces_ptr();
973}
974
975SYSCTL_DECL(_net_link);
976SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
977SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW,
978 ðer_ipfw,0,"Pass ether pkts through firewall");
979
980int
981ether_ioctl(ifp, command, data)
982 struct ifnet *ifp;
983 int command;
984 caddr_t data;
985{
986 struct ifaddr *ifa = (struct ifaddr *) data;
987 struct ifreq *ifr = (struct ifreq *) data;
988 int error = 0;
989
990 switch (command) {
991 case SIOCSIFADDR:
992 ifp->if_flags |= IFF_UP;
993
994 switch (ifa->ifa_addr->sa_family) {
995#ifdef INET
996 case AF_INET:
997 ifp->if_init(ifp->if_softc); /* before arpwhohas */
998 arp_ifinit(ifp, ifa);
999 break;
1000#endif
1001#ifdef IPX
1002 /*
1003 * XXX - This code is probably wrong
1004 */
1005 case AF_IPX:
1006 {
1007 register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
1008 struct arpcom *ac = IFP2AC(ifp);
1009
1010 if (ipx_nullhost(*ina))
1011 ina->x_host =
1012 *(union ipx_host *)
1013 ac->ac_enaddr;
1014 else {
1015 bcopy((caddr_t) ina->x_host.c_host,
1016 (caddr_t) ac->ac_enaddr,
1017 sizeof(ac->ac_enaddr));
1018 }
1019
1020 /*
1021 * Set new address
1022 */
1023 ifp->if_init(ifp->if_softc);
1024 break;
1025 }
1026#endif
1027#ifdef NS
1028 /*
1029 * XXX - This code is probably wrong
1030 */
1031 case AF_NS:
1032 {
1033 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
1034 struct arpcom *ac = IFP2AC(ifp);
1035
1036 if (ns_nullhost(*ina))
1037 ina->x_host =
1038 *(union ns_host *) (ac->ac_enaddr);
1039 else {
1040 bcopy((caddr_t) ina->x_host.c_host,
1041 (caddr_t) ac->ac_enaddr,
1042 sizeof(ac->ac_enaddr));
1043 }
1044
1045 /*
1046 * Set new address
1047 */
1048 ifp->if_init(ifp->if_softc);
1049 break;
1050 }
1051#endif
1052 default:
1053 ifp->if_init(ifp->if_softc);
1054 break;
1055 }
1056 break;
1057
1058 case SIOCGIFADDR:
1059 {
1060 struct sockaddr *sa;
1061
1062 sa = (struct sockaddr *) & ifr->ifr_data;
1063 bcopy(IFP2AC(ifp)->ac_enaddr,
1064 (caddr_t) sa->sa_data, ETHER_ADDR_LEN);
1065 }
1066 break;
1067
1068 case SIOCSIFMTU:
1069 /*
1070 * Set the interface MTU.
1071 */
1072 if (ifr->ifr_mtu > ETHERMTU) {
1073 error = EINVAL;
1074 } else {
1075 ifp->if_mtu = ifr->ifr_mtu;
1076 }
1077 break;
1078 default:
1079 error = EINVAL; /* XXX netbsd has ENOTTY??? */
1080 break;
1081 }
1082 return (error);
1083}
1084
1085static int
1086ether_resolvemulti(ifp, llsa, sa)
1087 struct ifnet *ifp;
1088 struct sockaddr **llsa;
1089 struct sockaddr *sa;
1090{
1091 struct sockaddr_dl *sdl;
1092 struct sockaddr_in *sin;
1093#ifdef INET6
1094 struct sockaddr_in6 *sin6;
1095#endif
1096 u_char *e_addr;
1097
1098 switch(sa->sa_family) {
1099 case AF_LINK:
1100 /*
1101 * No mapping needed. Just check that it's a valid MC address.
1102 */
1103 sdl = (struct sockaddr_dl *)sa;
1104 e_addr = LLADDR(sdl);
1105 if ((e_addr[0] & 1) != 1)
1106 return EADDRNOTAVAIL;
1107 *llsa = 0;
1108 return 0;
1109
1110#ifdef INET
1111 case AF_INET:
1112 sin = (struct sockaddr_in *)sa;
1113 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
1114 return EADDRNOTAVAIL;
1115 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
1116 M_WAITOK|M_ZERO);
1117 sdl->sdl_len = sizeof *sdl;
1118 sdl->sdl_family = AF_LINK;
1119 sdl->sdl_index = ifp->if_index;
1120 sdl->sdl_type = IFT_ETHER;
1121 sdl->sdl_alen = ETHER_ADDR_LEN;
1122 e_addr = LLADDR(sdl);
1123 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
1124 *llsa = (struct sockaddr *)sdl;
1125 return 0;
1126#endif
1127#ifdef INET6
1128 case AF_INET6:
1129 sin6 = (struct sockaddr_in6 *)sa;
1130 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1131 /*
1132 * An IP6 address of 0 means listen to all
1133 * of the Ethernet multicast address used for IP6.
1134 * (This is used for multicast routers.)
1135 */
1136 ifp->if_flags |= IFF_ALLMULTI;
1137 *llsa = 0;
1138 return 0;
1139 }
1140 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1141 return EADDRNOTAVAIL;
1142 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
1143 M_WAITOK|M_ZERO);
1144 sdl->sdl_len = sizeof *sdl;
1145 sdl->sdl_family = AF_LINK;
1146 sdl->sdl_index = ifp->if_index;
1147 sdl->sdl_type = IFT_ETHER;
1148 sdl->sdl_alen = ETHER_ADDR_LEN;
1149 e_addr = LLADDR(sdl);
1150 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
1151 *llsa = (struct sockaddr *)sdl;
1152 return 0;
1153#endif
1154
1155 default:
1156 /*
1157 * Well, the text isn't quite right, but it's the name
1158 * that counts...
1159 */
1160 return EAFNOSUPPORT;
1161 }
1162}
| 898 (*ng_ether_input_orphan_p)(ifp, m);
899 return;
900 }
901 m_freem(m);
902}
903
904/*
905 * Convert Ethernet address to printable (loggable) representation.
906 * This routine is for compatibility; it's better to just use
907 *
908 * printf("%6D", <pointer to address>, ":");
909 *
910 * since there's no static buffer involved.
911 */
912char *
913ether_sprintf(const u_char *ap)
914{
915 static char etherbuf[18];
916 snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":");
917 return (etherbuf);
918}
919
920/*
921 * Perform common duties while attaching to interface list
922 */
923void
924ether_ifattach(struct ifnet *ifp, const u_int8_t *llc)
925{
926 register struct ifaddr *ifa;
927 register struct sockaddr_dl *sdl;
928
929 ifp->if_type = IFT_ETHER;
930 ifp->if_addrlen = ETHER_ADDR_LEN;
931 ifp->if_hdrlen = ETHER_HDR_LEN;
932 if_attach(ifp);
933 ifp->if_mtu = ETHERMTU;
934 ifp->if_output = ether_output;
935 ifp->if_input = ether_input;
936 ifp->if_resolvemulti = ether_resolvemulti;
937 if (ifp->if_baudrate == 0)
938 ifp->if_baudrate = IF_Mbps(10); /* just a default */
939 ifp->if_broadcastaddr = etherbroadcastaddr;
940
941 ifa = ifaddr_byindex(ifp->if_index);
942 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
943 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
944 sdl->sdl_type = IFT_ETHER;
945 sdl->sdl_alen = ifp->if_addrlen;
946 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
947 /*
948 * XXX: This doesn't belong here; we do it until
949 * XXX: all drivers are cleaned up
950 */
951 if (llc != IFP2AC(ifp)->ac_enaddr)
952 bcopy(llc, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen);
953
954 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
955 if (ng_ether_attach_p != NULL)
956 (*ng_ether_attach_p)(ifp);
957 if (BDG_LOADED)
958 bdgtakeifaces_ptr();
959}
960
961/*
962 * Perform common duties while detaching an Ethernet interface
963 */
964void
965ether_ifdetach(struct ifnet *ifp)
966{
967 if (ng_ether_detach_p != NULL)
968 (*ng_ether_detach_p)(ifp);
969 bpfdetach(ifp);
970 if_detach(ifp);
971 if (BDG_LOADED)
972 bdgtakeifaces_ptr();
973}
974
975SYSCTL_DECL(_net_link);
976SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
977SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW,
978 ðer_ipfw,0,"Pass ether pkts through firewall");
979
980int
981ether_ioctl(ifp, command, data)
982 struct ifnet *ifp;
983 int command;
984 caddr_t data;
985{
986 struct ifaddr *ifa = (struct ifaddr *) data;
987 struct ifreq *ifr = (struct ifreq *) data;
988 int error = 0;
989
990 switch (command) {
991 case SIOCSIFADDR:
992 ifp->if_flags |= IFF_UP;
993
994 switch (ifa->ifa_addr->sa_family) {
995#ifdef INET
996 case AF_INET:
997 ifp->if_init(ifp->if_softc); /* before arpwhohas */
998 arp_ifinit(ifp, ifa);
999 break;
1000#endif
1001#ifdef IPX
1002 /*
1003 * XXX - This code is probably wrong
1004 */
1005 case AF_IPX:
1006 {
1007 register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
1008 struct arpcom *ac = IFP2AC(ifp);
1009
1010 if (ipx_nullhost(*ina))
1011 ina->x_host =
1012 *(union ipx_host *)
1013 ac->ac_enaddr;
1014 else {
1015 bcopy((caddr_t) ina->x_host.c_host,
1016 (caddr_t) ac->ac_enaddr,
1017 sizeof(ac->ac_enaddr));
1018 }
1019
1020 /*
1021 * Set new address
1022 */
1023 ifp->if_init(ifp->if_softc);
1024 break;
1025 }
1026#endif
1027#ifdef NS
1028 /*
1029 * XXX - This code is probably wrong
1030 */
1031 case AF_NS:
1032 {
1033 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
1034 struct arpcom *ac = IFP2AC(ifp);
1035
1036 if (ns_nullhost(*ina))
1037 ina->x_host =
1038 *(union ns_host *) (ac->ac_enaddr);
1039 else {
1040 bcopy((caddr_t) ina->x_host.c_host,
1041 (caddr_t) ac->ac_enaddr,
1042 sizeof(ac->ac_enaddr));
1043 }
1044
1045 /*
1046 * Set new address
1047 */
1048 ifp->if_init(ifp->if_softc);
1049 break;
1050 }
1051#endif
1052 default:
1053 ifp->if_init(ifp->if_softc);
1054 break;
1055 }
1056 break;
1057
1058 case SIOCGIFADDR:
1059 {
1060 struct sockaddr *sa;
1061
1062 sa = (struct sockaddr *) & ifr->ifr_data;
1063 bcopy(IFP2AC(ifp)->ac_enaddr,
1064 (caddr_t) sa->sa_data, ETHER_ADDR_LEN);
1065 }
1066 break;
1067
1068 case SIOCSIFMTU:
1069 /*
1070 * Set the interface MTU.
1071 */
1072 if (ifr->ifr_mtu > ETHERMTU) {
1073 error = EINVAL;
1074 } else {
1075 ifp->if_mtu = ifr->ifr_mtu;
1076 }
1077 break;
1078 default:
1079 error = EINVAL; /* XXX netbsd has ENOTTY??? */
1080 break;
1081 }
1082 return (error);
1083}
1084
1085static int
1086ether_resolvemulti(ifp, llsa, sa)
1087 struct ifnet *ifp;
1088 struct sockaddr **llsa;
1089 struct sockaddr *sa;
1090{
1091 struct sockaddr_dl *sdl;
1092 struct sockaddr_in *sin;
1093#ifdef INET6
1094 struct sockaddr_in6 *sin6;
1095#endif
1096 u_char *e_addr;
1097
1098 switch(sa->sa_family) {
1099 case AF_LINK:
1100 /*
1101 * No mapping needed. Just check that it's a valid MC address.
1102 */
1103 sdl = (struct sockaddr_dl *)sa;
1104 e_addr = LLADDR(sdl);
1105 if ((e_addr[0] & 1) != 1)
1106 return EADDRNOTAVAIL;
1107 *llsa = 0;
1108 return 0;
1109
1110#ifdef INET
1111 case AF_INET:
1112 sin = (struct sockaddr_in *)sa;
1113 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
1114 return EADDRNOTAVAIL;
1115 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
1116 M_WAITOK|M_ZERO);
1117 sdl->sdl_len = sizeof *sdl;
1118 sdl->sdl_family = AF_LINK;
1119 sdl->sdl_index = ifp->if_index;
1120 sdl->sdl_type = IFT_ETHER;
1121 sdl->sdl_alen = ETHER_ADDR_LEN;
1122 e_addr = LLADDR(sdl);
1123 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
1124 *llsa = (struct sockaddr *)sdl;
1125 return 0;
1126#endif
1127#ifdef INET6
1128 case AF_INET6:
1129 sin6 = (struct sockaddr_in6 *)sa;
1130 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1131 /*
1132 * An IP6 address of 0 means listen to all
1133 * of the Ethernet multicast address used for IP6.
1134 * (This is used for multicast routers.)
1135 */
1136 ifp->if_flags |= IFF_ALLMULTI;
1137 *llsa = 0;
1138 return 0;
1139 }
1140 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1141 return EADDRNOTAVAIL;
1142 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
1143 M_WAITOK|M_ZERO);
1144 sdl->sdl_len = sizeof *sdl;
1145 sdl->sdl_family = AF_LINK;
1146 sdl->sdl_index = ifp->if_index;
1147 sdl->sdl_type = IFT_ETHER;
1148 sdl->sdl_alen = ETHER_ADDR_LEN;
1149 e_addr = LLADDR(sdl);
1150 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
1151 *llsa = (struct sockaddr *)sdl;
1152 return 0;
1153#endif
1154
1155 default:
1156 /*
1157 * Well, the text isn't quite right, but it's the name
1158 * that counts...
1159 */
1160 return EAFNOSUPPORT;
1161 }
1162}
|