netisr: Add hashcheck method to check and adjust hw provided hash
[dragonfly.git] / sys / net / if_ethersubr.c
CommitLineData
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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: src/sys/net/if_ethersubr.c,v 1.70.2.33 2003/04/28 15:45:53 archie Exp $
b9ed4403 35 * $DragonFly: src/sys/net/if_ethersubr.c,v 1.96 2008/11/22 04:00:53 sephe Exp $
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36 */
37
38#include "opt_atalk.h"
39#include "opt_inet.h"
40#include "opt_inet6.h"
41#include "opt_ipx.h"
9b42cabe 42#include "opt_mpls.h"
984263bc 43#include "opt_netgraph.h"
0d16ba1d 44#include "opt_carp.h"
7c7f9646 45#include "opt_rss.h"
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46
47#include <sys/param.h>
48#include <sys/systm.h>
68b67450 49#include <sys/globaldata.h>
984263bc 50#include <sys/kernel.h>
f3e0b5f0 51#include <sys/ktr.h>
8b3db995 52#include <sys/lock.h>
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53#include <sys/malloc.h>
54#include <sys/mbuf.h>
68b67450 55#include <sys/msgport.h>
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56#include <sys/socket.h>
57#include <sys/sockio.h>
58#include <sys/sysctl.h>
68b67450 59#include <sys/thread.h>
684a93c4 60
68b67450 61#include <sys/thread2.h>
684a93c4 62#include <sys/mplock2.h>
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63
64#include <net/if.h>
65#include <net/netisr.h>
66#include <net/route.h>
67#include <net/if_llc.h>
68#include <net/if_dl.h>
69#include <net/if_types.h>
4d723e5a 70#include <net/ifq_var.h>
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71#include <net/bpf.h>
72#include <net/ethernet.h>
e6b5847c 73#include <net/vlan/if_vlan_ether.h>
29bc1092 74#include <net/netmsg2.h>
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75
76#if defined(INET) || defined(INET6)
77#include <netinet/in.h>
8697599b 78#include <netinet/ip_var.h>
984263bc 79#include <netinet/if_ether.h>
4639df5f 80#include <netinet/ip_flow.h>
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81#include <net/ipfw/ip_fw.h>
82#include <net/dummynet/ip_dummynet.h>
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83#endif
84#ifdef INET6
85#include <netinet6/nd6.h>
86#endif
87
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88#ifdef CARP
89#include <netinet/ip_carp.h>
90#endif
91
984263bc 92#ifdef IPX
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93#include <netproto/ipx/ipx.h>
94#include <netproto/ipx/ipx_if.h>
32211831 95int (*ef_inputp)(struct ifnet*, const struct ether_header *eh, struct mbuf *m);
f23061d4
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96int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst,
97 short *tp, int *hlen);
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98#endif
99
984263bc 100#ifdef NETATALK
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101#include <netproto/atalk/at.h>
102#include <netproto/atalk/at_var.h>
103#include <netproto/atalk/at_extern.h>
984263bc 104
f23061d4
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105#define llc_snap_org_code llc_un.type_snap.org_code
106#define llc_snap_ether_type llc_un.type_snap.ether_type
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107
108extern u_char at_org_code[3];
109extern u_char aarp_org_code[3];
110#endif /* NETATALK */
111
9b42cabe
NA
112#ifdef MPLS
113#include <netproto/mpls/mpls.h>
114#endif
115
984263bc 116/* netgraph node hooks for ng_ether(4) */
601fa0f9 117void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
984263bc 118void (*ng_ether_input_orphan_p)(struct ifnet *ifp,
36f48e5e 119 struct mbuf *m, const struct ether_header *eh);
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120int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
121void (*ng_ether_attach_p)(struct ifnet *ifp);
122void (*ng_ether_detach_p)(struct ifnet *ifp);
123
50098e2e 124void (*vlan_input_p)(struct mbuf *);
3013ac0e 125
5fe66e68
JH
126static int ether_output(struct ifnet *, struct mbuf *, struct sockaddr *,
127 struct rtentry *);
9b77ea6e
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128static void ether_restore_header(struct mbuf **, const struct ether_header *,
129 const struct ether_header *);
984263bc 130
f23061d4 131/*
a8d45119 132 * if_bridge support
f23061d4 133 */
db37145f 134struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
eb366364 135int (*bridge_output_p)(struct ifnet *, struct mbuf *);
db37145f 136void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
70d9a675 137struct ifnet *(*bridge_interface_p)(void *if_bridge);
db37145f 138
5fe66e68
JH
139static int ether_resolvemulti(struct ifnet *, struct sockaddr **,
140 struct sockaddr *);
141
142const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = {
c401f0fd
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143 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
144};
145
5fe66e68 146#define gotoerr(e) do { error = (e); goto bad; } while (0)
f23061d4 147#define IFP2AC(ifp) ((struct arpcom *)(ifp))
984263bc 148
5fe66e68 149static boolean_t ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst,
7c5bb821 150 struct ip_fw **rule,
90ca9293 151 const struct ether_header *eh);
5fe66e68 152
984263bc 153static int ether_ipfw;
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154static u_int ether_restore_hdr;
155static u_int ether_prepend_hdr;
70d9a675 156static int ether_debug;
9b77ea6e 157
7c7f9646
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158#ifdef RSS_DEBUG
159static u_int ether_pktinfo_try;
160static u_int ether_pktinfo_hit;
161static u_int ether_rss_nopi;
162static u_int ether_rss_nohash;
163#endif
164
5fe66e68
JH
165SYSCTL_DECL(_net_link);
166SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
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MD
167SYSCTL_INT(_net_link_ether, OID_AUTO, debug, CTLFLAG_RW,
168 &ether_debug, 0, "Ether debug");
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JH
169SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW,
170 &ether_ipfw, 0, "Pass ether pkts through firewall");
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171SYSCTL_UINT(_net_link_ether, OID_AUTO, restore_hdr, CTLFLAG_RW,
172 &ether_restore_hdr, 0, "# of ether header restoration");
173SYSCTL_UINT(_net_link_ether, OID_AUTO, prepend_hdr, CTLFLAG_RW,
174 &ether_prepend_hdr, 0,
175 "# of ether header restoration which prepends mbuf");
7c7f9646
SZ
176#ifdef RSS_DEBUG
177SYSCTL_UINT(_net_link_ether, OID_AUTO, rss_nopi, CTLFLAG_RW,
178 &ether_rss_nopi, 0, "# of packets do not have pktinfo");
179SYSCTL_UINT(_net_link_ether, OID_AUTO, rss_nohash, CTLFLAG_RW,
180 &ether_rss_nohash, 0, "# of packets do not have hash");
181SYSCTL_UINT(_net_link_ether, OID_AUTO, pktinfo_try, CTLFLAG_RW,
182 &ether_pktinfo_try, 0,
183 "# of tries to find packets' msgport using pktinfo");
184SYSCTL_UINT(_net_link_ether, OID_AUTO, pktinfo_hit, CTLFLAG_RW,
185 &ether_pktinfo_hit, 0,
186 "# of packets whose msgport are found using pktinfo");
187#endif
984263bc 188
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SZ
189#define ETHER_KTR_STR "ifp=%p"
190#define ETHER_KTR_ARG_SIZE (sizeof(void *))
191#ifndef KTR_ETHERNET
192#define KTR_ETHERNET KTR_ALL
193#endif
194KTR_INFO_MASTER(ether);
195KTR_INFO(KTR_ETHERNET, ether, chain_beg, 0, ETHER_KTR_STR, ETHER_KTR_ARG_SIZE);
196KTR_INFO(KTR_ETHERNET, ether, chain_end, 1, ETHER_KTR_STR, ETHER_KTR_ARG_SIZE);
197KTR_INFO(KTR_ETHERNET, ether, disp_beg, 2, ETHER_KTR_STR, ETHER_KTR_ARG_SIZE);
198KTR_INFO(KTR_ETHERNET, ether, disp_end, 3, ETHER_KTR_STR, ETHER_KTR_ARG_SIZE);
199#define logether(name, arg) KTR_LOG(ether_ ## name, arg)
200
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MD
201/*
202 * Ethernet output routine.
203 * Encapsulate a packet of type family for the local net.
204 * Use trailer local net encapsulation if enough data in first
205 * packet leaves a multiple of 512 bytes of data in remainder.
206 * Assumes that ifp is actually pointer to arpcom structure.
207 */
3013ac0e
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208static int
209ether_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
f23061d4 210 struct rtentry *rt)
984263bc 211{
f23061d4
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212 struct ether_header *eh, *deh;
213 u_char *edst;
984263bc 214 int loop_copy = 0;
f23061d4 215 int hlen = ETHER_HDR_LEN; /* link layer header length */
984263bc 216 struct arpcom *ac = IFP2AC(ifp);
f23061d4 217 int error;
984263bc 218
2c9effcf 219 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
57dff79c 220
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MD
221 if (ifp->if_flags & IFF_MONITOR)
222 gotoerr(ENETDOWN);
f23061d4
JH
223 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING))
224 gotoerr(ENETDOWN);
225
226 M_PREPEND(m, sizeof(struct ether_header), MB_DONTWAIT);
227 if (m == NULL)
5fe66e68 228 return (ENOBUFS);
f23061d4
JH
229 eh = mtod(m, struct ether_header *);
230 edst = eh->ether_dhost;
231
5fe66e68
JH
232 /*
233 * Fill in the destination ethernet address and frame type.
234 */
984263bc
MD
235 switch (dst->sa_family) {
236#ifdef INET
237 case AF_INET:
f23061d4 238 if (!arpresolve(ifp, rt, m, dst, edst))
984263bc 239 return (0); /* if not yet resolved */
cb8d752c
NA
240#ifdef MPLS
241 if (m->m_flags & M_MPLSLABELED)
242 eh->ether_type = htons(ETHERTYPE_MPLS);
243 else
244#endif
245 eh->ether_type = htons(ETHERTYPE_IP);
984263bc
MD
246 break;
247#endif
248#ifdef INET6
249 case AF_INET6:
f23061d4 250 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, edst))
5fe66e68 251 return (0); /* Something bad happenned. */
f23061d4 252 eh->ether_type = htons(ETHERTYPE_IPV6);
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MD
253 break;
254#endif
255#ifdef IPX
256 case AF_IPX:
f23061d4 257 if (ef_outputp != NULL) {
ff54734e
SZ
258 /*
259 * Hold BGL and recheck ef_outputp
260 */
261 get_mplock();
262 if (ef_outputp != NULL) {
263 error = ef_outputp(ifp, &m, dst,
264 &eh->ether_type, &hlen);
265 rel_mplock();
266 if (error)
267 goto bad;
268 else
269 break;
270 }
271 rel_mplock();
f23061d4 272 }
ff54734e
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273 eh->ether_type = htons(ETHERTYPE_IPX);
274 bcopy(&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
275 edst, ETHER_ADDR_LEN);
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MD
276 break;
277#endif
278#ifdef NETATALK
f23061d4
JH
279 case AF_APPLETALK: {
280 struct at_ifaddr *aa;
281
ff54734e
SZ
282 /*
283 * Hold BGL
284 */
285 get_mplock();
286
f23061d4
JH
287 if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) {
288 error = 0; /* XXX */
ff54734e 289 rel_mplock();
f23061d4
JH
290 goto bad;
291 }
292 /*
293 * In the phase 2 case, need to prepend an mbuf for
294 * the llc header. Since we must preserve the value
295 * of m, which is passed to us by value, we m_copy()
296 * the first mbuf, and use it for our llc header.
297 */
298 if (aa->aa_flags & AFA_PHASE2) {
299 struct llc llc;
300
301 M_PREPEND(m, sizeof(struct llc), MB_DONTWAIT);
5fe66e68
JH
302 eh = mtod(m, struct ether_header *);
303 edst = eh->ether_dhost;
f23061d4
JH
304 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
305 llc.llc_control = LLC_UI;
306 bcopy(at_org_code, llc.llc_snap_org_code,
307 sizeof at_org_code);
308 llc.llc_snap_ether_type = htons(ETHERTYPE_AT);
5fe66e68
JH
309 bcopy(&llc,
310 mtod(m, caddr_t) + sizeof(struct ether_header),
311 sizeof(struct llc));
f23061d4
JH
312 eh->ether_type = htons(m->m_pkthdr.len);
313 hlen = sizeof(struct llc) + ETHER_HDR_LEN;
314 } else {
315 eh->ether_type = htons(ETHERTYPE_AT);
316 }
ff54734e
SZ
317 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) {
318 rel_mplock();
f23061d4 319 return (0);
ff54734e
SZ
320 }
321
322 rel_mplock();
f23061d4 323 break;
984263bc 324 }
5fe66e68 325#endif
984263bc 326 case pseudo_AF_HDRCMPLT:
984263bc
MD
327 case AF_UNSPEC:
328 loop_copy = -1; /* if this is for us, don't do it */
f23061d4
JH
329 deh = (struct ether_header *)dst->sa_data;
330 memcpy(edst, deh->ether_dhost, ETHER_ADDR_LEN);
331 eh->ether_type = deh->ether_type;
984263bc
MD
332 break;
333
334 default:
8f0777ca 335 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
f23061d4 336 gotoerr(EAFNOSUPPORT);
984263bc
MD
337 }
338
f23061d4
JH
339 if (dst->sa_family == pseudo_AF_HDRCMPLT) /* unlikely */
340 memcpy(eh->ether_shost,
341 ((struct ether_header *)dst->sa_data)->ether_shost,
342 ETHER_ADDR_LEN);
984263bc 343 else
f23061d4 344 memcpy(eh->ether_shost, ac->ac_enaddr, ETHER_ADDR_LEN);
984263bc
MD
345
346 /*
db37145f
SS
347 * Bridges require special output handling.
348 */
349 if (ifp->if_bridge) {
8f0777ca
SZ
350 KASSERT(bridge_output_p != NULL,
351 ("%s: if_bridge not loaded!", __func__));
ad8c8b44 352 return bridge_output_p(ifp, m);
db37145f
SS
353 }
354
355 /*
984263bc
MD
356 * If a simplex interface, and the packet is being sent to our
357 * Ethernet address or a broadcast address, loopback a copy.
358 * XXX To make a simplex device behave exactly like a duplex
359 * device, we should copy in the case of sending to our own
360 * ethernet address (thus letting the original actually appear
361 * on the wire). However, we don't do that here for security
362 * reasons and compatibility with the original behavior.
363 */
364 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
365 int csum_flags = 0;
366
367 if (m->m_pkthdr.csum_flags & CSUM_IP)
f23061d4 368 csum_flags |= (CSUM_IP_CHECKED | CSUM_IP_VALID);
984263bc 369 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
f23061d4 370 csum_flags |= (CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
984263bc
MD
371 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
372 struct mbuf *n;
373
f23061d4 374 if ((n = m_copypacket(m, MB_DONTWAIT)) != NULL) {
984263bc
MD
375 n->m_pkthdr.csum_flags |= csum_flags;
376 if (csum_flags & CSUM_DATA_VALID)
377 n->m_pkthdr.csum_data = 0xffff;
f23061d4 378 if_simloop(ifp, n, dst->sa_family, hlen);
984263bc
MD
379 } else
380 ifp->if_iqdrops++;
f23061d4
JH
381 } else if (bcmp(eh->ether_dhost, eh->ether_shost,
382 ETHER_ADDR_LEN) == 0) {
984263bc
MD
383 m->m_pkthdr.csum_flags |= csum_flags;
384 if (csum_flags & CSUM_DATA_VALID)
385 m->m_pkthdr.csum_data = 0xffff;
f23061d4 386 if_simloop(ifp, m, dst->sa_family, hlen);
984263bc
MD
387 return (0); /* XXX */
388 }
389 }
390
0d16ba1d 391#ifdef CARP
ff54734e
SZ
392 if (ifp->if_carp) {
393 /*
394 * Hold BGL and recheck ifp->if_carp
395 */
396 get_mplock();
397 if (ifp->if_carp && (error = carp_output(ifp, m, dst, NULL))) {
398 rel_mplock();
399 goto bad;
400 }
401 rel_mplock();
402 }
0d16ba1d
MD
403#endif
404
405
984263bc
MD
406 /* Handle ng_ether(4) processing, if any */
407 if (ng_ether_output_p != NULL) {
ff54734e
SZ
408 /*
409 * Hold BGL and recheck ng_ether_output_p
410 */
411 get_mplock();
412 if (ng_ether_output_p != NULL) {
413 if ((error = ng_ether_output_p(ifp, &m)) != 0) {
414 rel_mplock();
415 goto bad;
416 }
417 if (m == NULL) {
418 rel_mplock();
419 return (0);
420 }
421 }
422 rel_mplock();
984263bc
MD
423 }
424
425 /* Continue with link-layer output */
426 return ether_output_frame(ifp, m);
0c3c561c
JH
427
428bad:
429 m_freem(m);
430 return (error);
984263bc
MD
431}
432
433/*
70d9a675
MD
434 * Returns the bridge interface an ifp is associated
435 * with.
436 *
437 * Only call if ifp->if_bridge != NULL.
438 */
439struct ifnet *
440ether_bridge_interface(struct ifnet *ifp)
441{
442 if (bridge_interface_p)
443 return(bridge_interface_p(ifp->if_bridge));
444 return (ifp);
445}
446
447/*
984263bc
MD
448 * Ethernet link layer output routine to send a raw frame to the device.
449 *
450 * This assumes that the 14 byte Ethernet header is present and contiguous
a8d45119 451 * in the first mbuf.
984263bc
MD
452 */
453int
f23061d4 454ether_output_frame(struct ifnet *ifp, struct mbuf *m)
984263bc 455{
f23061d4 456 struct ip_fw *rule = NULL;
984263bc 457 int error = 0;
4d723e5a 458 struct altq_pktattr pktattr;
984263bc 459
2c9effcf 460 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
57dff79c 461
eb241549
SZ
462 if (m->m_pkthdr.fw_flags & DUMMYNET_MBUF_TAGGED) {
463 struct m_tag *mtag;
464
465 /* Extract info from dummynet tag */
466 mtag = m_tag_find(m, PACKET_TAG_DUMMYNET, NULL);
467 KKASSERT(mtag != NULL);
84a3e25a 468 rule = ((struct dn_pkt *)m_tag_data(mtag))->dn_priv;
eb241549 469 KKASSERT(rule != NULL);
4c7020ad
SZ
470
471 m_tag_delete(m, mtag);
eb241549 472 m->m_pkthdr.fw_flags &= ~DUMMYNET_MBUF_TAGGED;
5fe66e68 473 }
984263bc 474
4d723e5a
JS
475 if (ifq_is_enabled(&ifp->if_snd))
476 altq_etherclassify(&ifp->if_snd, m, &pktattr);
4986965b 477 crit_enter();
984263bc
MD
478 if (IPFW_LOADED && ether_ipfw != 0) {
479 struct ether_header save_eh, *eh;
480
481 eh = mtod(m, struct ether_header *);
482 save_eh = *eh;
483 m_adj(m, ETHER_HDR_LEN);
90ca9293 484 if (!ether_ipfw_chk(&m, ifp, &rule, eh)) {
4986965b 485 crit_exit();
5fe66e68 486 if (m != NULL) {
984263bc 487 m_freem(m);
f23061d4 488 return ENOBUFS; /* pkt dropped */
984263bc
MD
489 } else
490 return 0; /* consumed e.g. in a pipe */
491 }
9b77ea6e 492
984263bc 493 /* packet was ok, restore the ethernet header */
9b77ea6e
SZ
494 ether_restore_header(&m, eh, &save_eh);
495 if (m == NULL) {
496 crit_exit();
497 return ENOBUFS;
984263bc
MD
498 }
499 }
78195a76 500 crit_exit();
984263bc
MD
501
502 /*
503 * Queue message on interface, update output statistics if
504 * successful, and start output if interface not yet active.
505 */
9db4b353 506 error = ifq_dispatch(ifp, m, &pktattr);
984263bc
MD
507 return (error);
508}
509
510/*
511 * ipfw processing for ethernet packets (in and out).
5fe66e68 512 * The second parameter is NULL from ether_demux(), and ifp from
a8d45119 513 * ether_output_frame().
984263bc 514 */
5fe66e68 515static boolean_t
90ca9293
SZ
516ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, struct ip_fw **rule,
517 const struct ether_header *eh)
984263bc 518{
29b27cb7 519 struct ether_header save_eh = *eh; /* might be a ptr in *m0 */
984263bc 520 struct ip_fw_args args;
e5ecc832 521 struct m_tag *mtag;
29b27cb7 522 struct mbuf *m;
f23061d4 523 int i;
984263bc
MD
524
525 if (*rule != NULL && fw_one_pass)
5fe66e68 526 return TRUE; /* dummynet packet, already partially processed */
984263bc
MD
527
528 /*
90ca9293 529 * I need some amount of data to be contiguous.
984263bc 530 */
f23061d4 531 i = min((*m0)->m_pkthdr.len, max_protohdr);
90ca9293 532 if ((*m0)->m_len < i) {
984263bc
MD
533 *m0 = m_pullup(*m0, i);
534 if (*m0 == NULL)
5fe66e68 535 return FALSE;
984263bc
MD
536 }
537
5de23090
SZ
538 /*
539 * Clean up tags
540 */
e5ecc832
JS
541 if ((mtag = m_tag_find(*m0, PACKET_TAG_IPFW_DIVERT, NULL)) != NULL)
542 m_tag_delete(*m0, mtag);
5de23090
SZ
543 if ((*m0)->m_pkthdr.fw_flags & IPFORWARD_MBUF_TAGGED) {
544 mtag = m_tag_find(*m0, PACKET_TAG_IPFORWARD, NULL);
545 KKASSERT(mtag != NULL);
546 m_tag_delete(*m0, mtag);
547 (*m0)->m_pkthdr.fw_flags &= ~IPFORWARD_MBUF_TAGGED;
548 }
549
550 args.m = *m0; /* the packet we are looking at */
551 args.oif = dst; /* destination, if any */
984263bc 552 args.rule = *rule; /* matching rule to restart */
984263bc
MD
553 args.eh = &save_eh; /* MAC header for bridged/MAC packets */
554 i = ip_fw_chk_ptr(&args);
555 *m0 = args.m;
556 *rule = args.rule;
557
29b27cb7 558 if (*m0 == NULL)
5fe66e68 559 return FALSE;
984263bc 560
29b27cb7
SZ
561 switch (i) {
562 case IP_FW_PASS:
5fe66e68 563 return TRUE;
984263bc 564
29b27cb7
SZ
565 case IP_FW_DIVERT:
566 case IP_FW_TEE:
567 case IP_FW_DENY:
984263bc 568 /*
29b27cb7
SZ
569 * XXX at some point add support for divert/forward actions.
570 * If none of the above matches, we have to drop the pkt.
984263bc 571 */
29b27cb7 572 return FALSE;
984263bc 573
29b27cb7
SZ
574 case IP_FW_DUMMYNET:
575 /*
576 * Pass the pkt to dummynet, which consumes it.
577 */
90ca9293
SZ
578 m = *m0; /* pass the original to dummynet */
579 *m0 = NULL; /* and nothing back to the caller */
9b77ea6e
SZ
580
581 ether_restore_header(&m, eh, &save_eh);
582 if (m == NULL)
583 return FALSE;
584
29b27cb7
SZ
585 ip_fw_dn_io_ptr(m, args.cookie,
586 dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args);
e4d4f9c3 587 ip_dn_queue(m);
5fe66e68 588 return FALSE;
29b27cb7
SZ
589
590 default:
591 panic("unknown ipfw return value: %d\n", i);
984263bc 592 }
984263bc
MD
593}
594
4853cd0f 595static void
68b67450
SZ
596ether_input(struct ifnet *ifp, struct mbuf *m)
597{
2eb0d069 598 ether_input_chain(ifp, m, NULL, NULL);
984263bc
MD
599}
600
601/*
602 * Perform common duties while attaching to interface list
603 */
604void
78195a76 605ether_ifattach(struct ifnet *ifp, uint8_t *lla, lwkt_serialize_t serializer)
984263bc 606{
78195a76
MD
607 ether_ifattach_bpf(ifp, lla, DLT_EN10MB, sizeof(struct ether_header),
608 serializer);
c0f6c904
JS
609}
610
611void
78195a76
MD
612ether_ifattach_bpf(struct ifnet *ifp, uint8_t *lla, u_int dlt, u_int hdrlen,
613 lwkt_serialize_t serializer)
c0f6c904 614{
82ed7fc2 615 struct sockaddr_dl *sdl;
984263bc
MD
616
617 ifp->if_type = IFT_ETHER;
c401f0fd 618 ifp->if_addrlen = ETHER_ADDR_LEN;
5fe66e68 619 ifp->if_hdrlen = ETHER_HDR_LEN;
78195a76 620 if_attach(ifp, serializer);
984263bc 621 ifp->if_mtu = ETHERMTU;
984263bc 622 if (ifp->if_baudrate == 0)
f23061d4 623 ifp->if_baudrate = 10000000;
5fe66e68 624 ifp->if_output = ether_output;
0b076e92 625 ifp->if_input = ether_input;
5fe66e68
JH
626 ifp->if_resolvemulti = ether_resolvemulti;
627 ifp->if_broadcastaddr = etherbroadcastaddr;
f2682cb9 628 sdl = IF_LLSOCKADDR(ifp);
984263bc
MD
629 sdl->sdl_type = IFT_ETHER;
630 sdl->sdl_alen = ifp->if_addrlen;
0a8b5977 631 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
c568d5be
JS
632 /*
633 * XXX Keep the current drivers happy.
634 * XXX Remove once all drivers have been cleaned up
635 */
636 if (lla != IFP2AC(ifp)->ac_enaddr)
637 bcopy(lla, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen);
c0f6c904 638 bpfattach(ifp, dlt, hdrlen);
984263bc
MD
639 if (ng_ether_attach_p != NULL)
640 (*ng_ether_attach_p)(ifp);
267caeeb
JS
641
642 if_printf(ifp, "MAC address: %6D\n", lla, ":");
984263bc
MD
643}
644
645/*
646 * Perform common duties while detaching an Ethernet interface
647 */
648void
0a8b5977 649ether_ifdetach(struct ifnet *ifp)
984263bc 650{
45b8be9e 651 if_down(ifp);
45b8be9e 652
984263bc
MD
653 if (ng_ether_detach_p != NULL)
654 (*ng_ether_detach_p)(ifp);
0a8b5977 655 bpfdetach(ifp);
984263bc 656 if_detach(ifp);
984263bc
MD
657}
658
984263bc 659int
f23061d4 660ether_ioctl(struct ifnet *ifp, int command, caddr_t data)
984263bc
MD
661{
662 struct ifaddr *ifa = (struct ifaddr *) data;
663 struct ifreq *ifr = (struct ifreq *) data;
664 int error = 0;
665
cbf2eda6
SZ
666#define IF_INIT(ifp) \
667do { \
668 if (((ifp)->if_flags & IFF_UP) == 0) { \
669 (ifp)->if_flags |= IFF_UP; \
670 (ifp)->if_init((ifp)->if_softc); \
671 } \
672} while (0)
673
2c9effcf 674 ASSERT_IFNET_SERIALIZED_ALL(ifp);
78195a76 675
984263bc
MD
676 switch (command) {
677 case SIOCSIFADDR:
984263bc
MD
678 switch (ifa->ifa_addr->sa_family) {
679#ifdef INET
680 case AF_INET:
cbf2eda6 681 IF_INIT(ifp); /* before arpwhohas */
984263bc
MD
682 arp_ifinit(ifp, ifa);
683 break;
684#endif
685#ifdef IPX
686 /*
687 * XXX - This code is probably wrong
688 */
689 case AF_IPX:
690 {
f23061d4 691 struct ipx_addr *ina = &IA_SIPX(ifa)->sipx_addr;
984263bc
MD
692 struct arpcom *ac = IFP2AC(ifp);
693
694 if (ipx_nullhost(*ina))
f23061d4
JH
695 ina->x_host = *(union ipx_host *) ac->ac_enaddr;
696 else
697 bcopy(ina->x_host.c_host, ac->ac_enaddr,
698 sizeof ac->ac_enaddr);
984263bc 699
cbf2eda6 700 IF_INIT(ifp); /* Set new address. */
984263bc
MD
701 break;
702 }
703#endif
984263bc 704 default:
cbf2eda6 705 IF_INIT(ifp);
984263bc
MD
706 break;
707 }
708 break;
709
710 case SIOCGIFADDR:
f23061d4
JH
711 bcopy(IFP2AC(ifp)->ac_enaddr,
712 ((struct sockaddr *)ifr->ifr_data)->sa_data,
713 ETHER_ADDR_LEN);
984263bc
MD
714 break;
715
716 case SIOCSIFMTU:
717 /*
718 * Set the interface MTU.
719 */
720 if (ifr->ifr_mtu > ETHERMTU) {
721 error = EINVAL;
722 } else {
723 ifp->if_mtu = ifr->ifr_mtu;
724 }
725 break;
c2d9fd91
JS
726 default:
727 error = EINVAL;
728 break;
984263bc
MD
729 }
730 return (error);
cbf2eda6
SZ
731
732#undef IF_INIT
984263bc
MD
733}
734
735int
f23061d4
JH
736ether_resolvemulti(
737 struct ifnet *ifp,
738 struct sockaddr **llsa,
739 struct sockaddr *sa)
984263bc
MD
740{
741 struct sockaddr_dl *sdl;
742 struct sockaddr_in *sin;
743#ifdef INET6
744 struct sockaddr_in6 *sin6;
745#endif
746 u_char *e_addr;
747
748 switch(sa->sa_family) {
749 case AF_LINK:
750 /*
751 * No mapping needed. Just check that it's a valid MC address.
752 */
753 sdl = (struct sockaddr_dl *)sa;
754 e_addr = LLADDR(sdl);
755 if ((e_addr[0] & 1) != 1)
756 return EADDRNOTAVAIL;
757 *llsa = 0;
758 return 0;
759
760#ifdef INET
761 case AF_INET:
762 sin = (struct sockaddr_in *)sa;
763 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
764 return EADDRNOTAVAIL;
765 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
5fe66e68 766 M_WAITOK | M_ZERO);
984263bc
MD
767 sdl->sdl_len = sizeof *sdl;
768 sdl->sdl_family = AF_LINK;
769 sdl->sdl_index = ifp->if_index;
770 sdl->sdl_type = IFT_ETHER;
771 sdl->sdl_alen = ETHER_ADDR_LEN;
772 e_addr = LLADDR(sdl);
773 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
774 *llsa = (struct sockaddr *)sdl;
775 return 0;
776#endif
777#ifdef INET6
778 case AF_INET6:
779 sin6 = (struct sockaddr_in6 *)sa;
780 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
781 /*
782 * An IP6 address of 0 means listen to all
783 * of the Ethernet multicast address used for IP6.
784 * (This is used for multicast routers.)
785 */
786 ifp->if_flags |= IFF_ALLMULTI;
787 *llsa = 0;
788 return 0;
789 }
790 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
791 return EADDRNOTAVAIL;
792 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
5fe66e68 793 M_WAITOK | M_ZERO);
984263bc
MD
794 sdl->sdl_len = sizeof *sdl;
795 sdl->sdl_family = AF_LINK;
796 sdl->sdl_index = ifp->if_index;
797 sdl->sdl_type = IFT_ETHER;
798 sdl->sdl_alen = ETHER_ADDR_LEN;
799 e_addr = LLADDR(sdl);
800 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
801 *llsa = (struct sockaddr *)sdl;
802 return 0;
803#endif
804
805 default:
806 /*
807 * Well, the text isn't quite right, but it's the name
808 * that counts...
809 */
810 return EAFNOSUPPORT;
811 }
812}
d6018c31
JS
813
814#if 0
815/*
816 * This is for reference. We have a table-driven version
817 * of the little-endian crc32 generator, which is faster
818 * than the double-loop.
819 */
820uint32_t
821ether_crc32_le(const uint8_t *buf, size_t len)
822{
823 uint32_t c, crc, carry;
824 size_t i, j;
825
826 crc = 0xffffffffU; /* initial value */
827
828 for (i = 0; i < len; i++) {
829 c = buf[i];
830 for (j = 0; j < 8; j++) {
831 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01);
832 crc >>= 1;
833 c >>= 1;
834 if (carry)
835 crc = (crc ^ ETHER_CRC_POLY_LE);
836 }
837 }
838
f23061d4 839 return (crc);
d6018c31
JS
840}
841#else
842uint32_t
843ether_crc32_le(const uint8_t *buf, size_t len)
844{
845 static const uint32_t crctab[] = {
846 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
847 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
848 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
849 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
850 };
851 uint32_t crc;
852 size_t i;
853
854 crc = 0xffffffffU; /* initial value */
855
856 for (i = 0; i < len; i++) {
857 crc ^= buf[i];
858 crc = (crc >> 4) ^ crctab[crc & 0xf];
859 crc = (crc >> 4) ^ crctab[crc & 0xf];
860 }
861
f23061d4 862 return (crc);
d6018c31
JS
863}
864#endif
865
866uint32_t
867ether_crc32_be(const uint8_t *buf, size_t len)
868{
869 uint32_t c, crc, carry;
870 size_t i, j;
871
872 crc = 0xffffffffU; /* initial value */
873
874 for (i = 0; i < len; i++) {
875 c = buf[i];
876 for (j = 0; j < 8; j++) {
877 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01);
878 crc <<= 1;
879 c >>= 1;
880 if (carry)
881 crc = (crc ^ ETHER_CRC_POLY_BE) | carry;
882 }
883 }
884
f23061d4 885 return (crc);
d6018c31 886}
4d723e5a 887
4d723e5a
JS
888/*
889 * find the size of ethernet header, and call classifier
890 */
891void
892altq_etherclassify(struct ifaltq *ifq, struct mbuf *m,
893 struct altq_pktattr *pktattr)
894{
895 struct ether_header *eh;
896 uint16_t ether_type;
897 int hlen, af, hdrsize;
898 caddr_t hdr;
899
900 hlen = sizeof(struct ether_header);
901 eh = mtod(m, struct ether_header *);
902
903 ether_type = ntohs(eh->ether_type);
904 if (ether_type < ETHERMTU) {
905 /* ick! LLC/SNAP */
906 struct llc *llc = (struct llc *)(eh + 1);
907 hlen += 8;
908
909 if (m->m_len < hlen ||
910 llc->llc_dsap != LLC_SNAP_LSAP ||
911 llc->llc_ssap != LLC_SNAP_LSAP ||
912 llc->llc_control != LLC_UI)
913 goto bad; /* not snap! */
914
915 ether_type = ntohs(llc->llc_un.type_snap.ether_type);
916 }
917
918 if (ether_type == ETHERTYPE_IP) {
919 af = AF_INET;
920 hdrsize = 20; /* sizeof(struct ip) */
921#ifdef INET6
922 } else if (ether_type == ETHERTYPE_IPV6) {
923 af = AF_INET6;
924 hdrsize = 40; /* sizeof(struct ip6_hdr) */
925#endif
926 } else
927 goto bad;
928
929 while (m->m_len <= hlen) {
930 hlen -= m->m_len;
931 m = m->m_next;
932 }
933 hdr = m->m_data + hlen;
934 if (m->m_len < hlen + hdrsize) {
935 /*
936 * ip header is not in a single mbuf. this should not
937 * happen in the current code.
938 * (todo: use m_pulldown in the future)
939 */
940 goto bad;
941 }
942 m->m_data += hlen;
943 m->m_len -= hlen;
944 ifq_classify(ifq, m, af, pktattr);
945 m->m_data -= hlen;
946 m->m_len += hlen;
947
948 return;
949
950bad:
951 pktattr->pattr_class = NULL;
952 pktattr->pattr_hdr = NULL;
953 pktattr->pattr_af = AF_UNSPEC;
954}
9b77ea6e
SZ
955
956static void
957ether_restore_header(struct mbuf **m0, const struct ether_header *eh,
958 const struct ether_header *save_eh)
959{
960 struct mbuf *m = *m0;
961
962 ether_restore_hdr++;
963
964 /*
965 * Prepend the header, optimize for the common case of
966 * eh pointing into the mbuf.
967 */
968 if ((const void *)(eh + 1) == (void *)m->m_data) {
969 m->m_data -= ETHER_HDR_LEN;
970 m->m_len += ETHER_HDR_LEN;
971 m->m_pkthdr.len += ETHER_HDR_LEN;
972 } else {
973 ether_prepend_hdr++;
974
975 M_PREPEND(m, ETHER_HDR_LEN, MB_DONTWAIT);
976 if (m != NULL) {
3d26a382 977 bcopy(save_eh, mtod(m, struct ether_header *),
9b77ea6e
SZ
978 ETHER_HDR_LEN);
979 }
980 }
981 *m0 = m;
982}
68b67450 983
68b67450
SZ
984static void
985ether_input_ipifunc(void *arg)
986{
987 struct mbuf *m, *next;
c3c96e44 988 lwkt_port_t port = cpu_portfn(mycpu->gd_cpuid);
68b67450
SZ
989
990 m = arg;
991 do {
992 next = m->m_nextpkt;
993 m->m_nextpkt = NULL;
002c1265 994 lwkt_sendmsg(port, &m->m_hdr.mh_netmsg.base.lmsg);
68b67450
SZ
995 m = next;
996 } while (m != NULL);
997}
998
999void
1000ether_input_dispatch(struct mbuf_chain *chain)
1001{
1002#ifdef SMP
1003 int i;
1004
f3e0b5f0 1005 logether(disp_beg, NULL);
68b67450
SZ
1006 for (i = 0; i < ncpus; ++i) {
1007 if (chain[i].mc_head != NULL) {
1008 lwkt_send_ipiq(globaldata_find(i),
c3c96e44 1009 ether_input_ipifunc, chain[i].mc_head);
68b67450
SZ
1010 }
1011 }
1012#else
f3e0b5f0 1013 logether(disp_beg, NULL);
b358f907
SZ
1014 if (chain->mc_head != NULL)
1015 ether_input_ipifunc(chain->mc_head);
68b67450 1016#endif
f3e0b5f0 1017 logether(disp_end, NULL);
68b67450
SZ
1018}
1019
57ccf5a2
SZ
1020void
1021ether_input_chain_init(struct mbuf_chain *chain)
1022{
1023#ifdef SMP
1024 int i;
1025
1026 for (i = 0; i < ncpus; ++i)
1027 chain[i].mc_head = chain[i].mc_tail = NULL;
1028#else
1029 chain->mc_head = chain->mc_tail = NULL;
1030#endif
1031}
1032
5f32d321
SZ
1033/*
1034 * Upper layer processing for a received Ethernet packet.
1035 */
297c8124 1036void
29bc1092
SZ
1037ether_demux_oncpu(struct ifnet *ifp, struct mbuf *m)
1038{
1039 struct ether_header *eh;
21b74198 1040 int isr, discard = 0;
29bc1092
SZ
1041 u_short ether_type;
1042 struct ip_fw *rule = NULL;
29bc1092
SZ
1043#ifdef NETATALK
1044 struct llc *l;
1045#endif
1046
1047 M_ASSERTPKTHDR(m);
1048 KASSERT(m->m_len >= ETHER_HDR_LEN,
1049 ("ether header is no contiguous!\n"));
1050
1051 eh = mtod(m, struct ether_header *);
1052
eb241549
SZ
1053 if (m->m_pkthdr.fw_flags & DUMMYNET_MBUF_TAGGED) {
1054 struct m_tag *mtag;
1055
1056 /* Extract info from dummynet tag */
1057 mtag = m_tag_find(m, PACKET_TAG_DUMMYNET, NULL);
1058 KKASSERT(mtag != NULL);
29bc1092 1059 rule = ((struct dn_pkt *)m_tag_data(mtag))->dn_priv;
eb241549
SZ
1060 KKASSERT(rule != NULL);
1061
29bc1092 1062 m_tag_delete(m, mtag);
eb241549
SZ
1063 m->m_pkthdr.fw_flags &= ~DUMMYNET_MBUF_TAGGED;
1064
1065 /* packet is passing the second time */
29bc1092 1066 goto post_stats;
eb241549 1067 }
29bc1092
SZ
1068
1069#ifdef CARP
1070 /*
1071 * XXX: Okay, we need to call carp_forus() and - if it is for
1072 * us jump over code that does the normal check
1073 * "ac_enaddr == ether_dhost". The check sequence is a bit
1074 * different from OpenBSD, so we jump over as few code as
1075 * possible, to catch _all_ sanity checks. This needs
1076 * evaluation, to see if the carp ether_dhost values break any
1077 * of these checks!
1078 */
c6690c74
SZ
1079 if (ifp->if_carp) {
1080 /*
1081 * Hold BGL and recheck ifp->if_carp
1082 */
1083 get_mplock();
1084 if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost)) {
1085 rel_mplock();
1086 goto post_stats;
1087 }
1088 rel_mplock();
1089 }
29bc1092
SZ
1090#endif
1091
1092 /*
469c71d1
SZ
1093 * We got a packet which was unicast to a different Ethernet
1094 * address. If the driver is working properly, then this
1095 * situation can only happen when the interface is in
1096 * promiscuous mode. We defer the packet discarding until the
1097 * vlan processing is done, so that vlan/bridge or vlan/netgraph
1098 * could work.
29bc1092
SZ
1099 */
1100 if (((ifp->if_flags & (IFF_PROMISC | IFF_PPROMISC)) == IFF_PROMISC) &&
d1859e78 1101 !ETHER_IS_MULTICAST(eh->ether_dhost) &&
70d9a675
MD
1102 bcmp(eh->ether_dhost, IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN)) {
1103 if (ether_debug & 1) {
1104 kprintf("%02x:%02x:%02x:%02x:%02x:%02x "
1105 "%02x:%02x:%02x:%02x:%02x:%02x "
1106 "%04x vs %02x:%02x:%02x:%02x:%02x:%02x\n",
1107 eh->ether_dhost[0],
1108 eh->ether_dhost[1],
1109 eh->ether_dhost[2],
1110 eh->ether_dhost[3],
1111 eh->ether_dhost[4],
1112 eh->ether_dhost[5],
1113 eh->ether_shost[0],
1114 eh->ether_shost[1],
1115 eh->ether_shost[2],
1116 eh->ether_shost[3],
1117 eh->ether_shost[4],
1118 eh->ether_shost[5],
1119 eh->ether_type,
1120 ((u_char *)IFP2AC(ifp)->ac_enaddr)[0],
1121 ((u_char *)IFP2AC(ifp)->ac_enaddr)[1],
1122 ((u_char *)IFP2AC(ifp)->ac_enaddr)[2],
1123 ((u_char *)IFP2AC(ifp)->ac_enaddr)[3],
1124 ((u_char *)IFP2AC(ifp)->ac_enaddr)[4],
1125 ((u_char *)IFP2AC(ifp)->ac_enaddr)[5]
1126 );
1127 }
1128 if ((ether_debug & 2) == 0)
1129 discard = 1;
1130 }
29bc1092
SZ
1131
1132post_stats:
469c71d1 1133 if (IPFW_LOADED && ether_ipfw != 0 && !discard) {
29bc1092
SZ
1134 struct ether_header save_eh = *eh;
1135
1136 /* XXX old crufty stuff, needs to be removed */
1137 m_adj(m, sizeof(struct ether_header));
1138
1139 if (!ether_ipfw_chk(&m, NULL, &rule, eh)) {
1140 m_freem(m);
1141 return;
1142 }
1143
1144 ether_restore_header(&m, eh, &save_eh);
1145 if (m == NULL)
1146 return;
1147 eh = mtod(m, struct ether_header *);
1148 }
1149
1150 ether_type = ntohs(eh->ether_type);
1151 KKASSERT(ether_type != ETHERTYPE_VLAN);
1152
1153 if (m->m_flags & M_VLANTAG) {
b327296f
SZ
1154 void (*vlan_input_func)(struct mbuf *);
1155
1156 vlan_input_func = vlan_input_p;
1157 if (vlan_input_func != NULL) {
1158 vlan_input_func(m);
29bc1092
SZ
1159 } else {
1160 m->m_pkthdr.rcvif->if_noproto++;
1161 m_freem(m);
1162 }
29bc1092
SZ
1163 return;
1164 }
1165
4d895293 1166 /*
469c71d1
SZ
1167 * If we have been asked to discard this packet
1168 * (e.g. not for us), drop it before entering
1169 * the upper layer.
1170 */
1171 if (discard) {
1172 m_freem(m);
1173 return;
1174 }
1175
1176 /*
4d895293
SZ
1177 * Clear protocol specific flags,
1178 * before entering the upper layer.
1179 */
da1604af 1180 m->m_flags &= ~M_ETHER_FLAGS;
4d895293
SZ
1181
1182 /* Strip ethernet header. */
29bc1092 1183 m_adj(m, sizeof(struct ether_header));
4d895293 1184
29bc1092
SZ
1185 switch (ether_type) {
1186#ifdef INET
1187 case ETHERTYPE_IP:
8697599b 1188 if ((m->m_flags & M_LENCHECKED) == 0) {
c3c96e44 1189 if (!ip_lengthcheck(&m, 0))
8697599b
SZ
1190 return;
1191 }
297c8124 1192 if (ipflow_fastforward(m))
29bc1092 1193 return;
29bc1092
SZ
1194 isr = NETISR_IP;
1195 break;
1196
1197 case ETHERTYPE_ARP:
1198 if (ifp->if_flags & IFF_NOARP) {
1199 /* Discard packet if ARP is disabled on interface */
1200 m_freem(m);
1201 return;
1202 }
1203 isr = NETISR_ARP;
1204 break;
1205#endif
1206
1207#ifdef INET6
1208 case ETHERTYPE_IPV6:
1209 isr = NETISR_IPV6;
1210 break;
1211#endif
1212
1213#ifdef IPX
1214 case ETHERTYPE_IPX:
c6690c74
SZ
1215 if (ef_inputp) {
1216 /*
1217 * Hold BGL and recheck ef_inputp
1218 */
1219 get_mplock();
1220 if (ef_inputp && ef_inputp(ifp, eh, m) == 0) {
1221 rel_mplock();
1222 return;
1223 }
1224 rel_mplock();
1225 }
29bc1092
SZ
1226 isr = NETISR_IPX;
1227 break;
1228#endif
1229
29bc1092
SZ
1230#ifdef NETATALK
1231 case ETHERTYPE_AT:
1232 isr = NETISR_ATALK1;
1233 break;
1234 case ETHERTYPE_AARP:
1235 isr = NETISR_AARP;
1236 break;
1237#endif
1238
a020e9d5
SZ
1239#ifdef MPLS
1240 case ETHERTYPE_MPLS:
1241 case ETHERTYPE_MPLS_MCAST:
50098e2e 1242 /* Should have been set by ether_input_chain(). */
cb8d752c 1243 KKASSERT(m->m_flags & M_MPLSLABELED);
a020e9d5
SZ
1244 isr = NETISR_MPLS;
1245 break;
1246#endif
1247
29bc1092
SZ
1248 default:
1249 /*
1250 * The accurate msgport is not determined before
1251 * we reach here, so redo the dispatching
1252 */
29bc1092 1253#ifdef IPX
c6690c74
SZ
1254 if (ef_inputp) {
1255 /*
1256 * Hold BGL and recheck ef_inputp
1257 */
1258 get_mplock();
1259 if (ef_inputp && ef_inputp(ifp, eh, m) == 0) {
1260 rel_mplock();
1261 return;
1262 }
1263 rel_mplock();
1264 }
29bc1092 1265#endif
29bc1092
SZ
1266#ifdef NETATALK
1267 if (ether_type > ETHERMTU)
1268 goto dropanyway;
1269 l = mtod(m, struct llc *);
1270 if (l->llc_dsap == LLC_SNAP_LSAP &&
1271 l->llc_ssap == LLC_SNAP_LSAP &&
1272 l->llc_control == LLC_UI) {
1273 if (bcmp(&(l->llc_snap_org_code)[0], at_org_code,
1274 sizeof at_org_code) == 0 &&
1275 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
1276 m_adj(m, sizeof(struct llc));
1277 isr = NETISR_ATALK2;
1278 break;
1279 }
1280 if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
1281 sizeof aarp_org_code) == 0 &&
1282 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
1283 m_adj(m, sizeof(struct llc));
1284 isr = NETISR_AARP;
1285 break;
1286 }
1287 }
1288dropanyway:
1289#endif
c6690c74
SZ
1290 if (ng_ether_input_orphan_p != NULL) {
1291 /*
1292 * Hold BGL and recheck ng_ether_input_orphan_p
1293 */
1294 get_mplock();
1295 if (ng_ether_input_orphan_p != NULL) {
1296 ng_ether_input_orphan_p(ifp, m, eh);
1297 rel_mplock();
1298 return;
1299 }
1300 rel_mplock();
1301 }
1302 m_freem(m);
29bc1092
SZ
1303 return;
1304 }
1305
c3c96e44 1306 netisr_queue(isr, m);
29bc1092
SZ
1307}
1308
5f32d321
SZ
1309/*
1310 * First we perform any link layer operations, then continue to the
1311 * upper layers with ether_demux_oncpu().
1312 */
c3c96e44 1313static void
29bc1092
SZ
1314ether_input_oncpu(struct ifnet *ifp, struct mbuf *m)
1315{
160af078
SZ
1316 if ((ifp->if_flags & (IFF_UP | IFF_MONITOR)) != IFF_UP) {
1317 /*
1318 * Receiving interface's flags are changed, when this
1319 * packet is waiting for processing; discard it.
1320 */
1321 m_freem(m);
1322 return;
1323 }
1324
29bc1092
SZ
1325 /*
1326 * Tap the packet off here for a bridge. bridge_input()
1327 * will return NULL if it has consumed the packet, otherwise
1328 * it gets processed as normal. Note that bridge_input()
1329 * will always return the original packet if we need to
1330 * process it locally.
1331 */
1332 if (ifp->if_bridge) {
1333 KASSERT(bridge_input_p != NULL,
1334 ("%s: if_bridge not loaded!", __func__));
1335
0899cb3e
SZ
1336 if(m->m_flags & M_ETHER_BRIDGED) {
1337 m->m_flags &= ~M_ETHER_BRIDGED;
29bc1092 1338 } else {
29bc1092
SZ
1339 m = bridge_input_p(ifp, m);
1340 if (m == NULL)
1341 return;
1342
1343 KASSERT(ifp == m->m_pkthdr.rcvif,
1344 ("bridge_input_p changed rcvif\n"));
1345 }
1346 }
1347
1348 /* Handle ng_ether(4) processing, if any */
1349 if (ng_ether_input_p != NULL) {
c6690c74
SZ
1350 /*
1351 * Hold BGL and recheck ng_ether_input_p
1352 */
1353 get_mplock();
1354 if (ng_ether_input_p != NULL)
1355 ng_ether_input_p(ifp, &m);
1356 rel_mplock();
1357
29bc1092
SZ
1358 if (m == NULL)
1359 return;
1360 }
1361
1362 /* Continue with upper layer processing */
1363 ether_demux_oncpu(ifp, m);
1364}
1365
b9ed4403
SZ
1366/*
1367 * Perform certain functions of ether_input_chain():
1368 * - Test IFF_UP
1369 * - Update statistics
1370 * - Run bpf(4) tap if requested
1371 * Then pass the packet to ether_input_oncpu().
1372 *
1373 * This function should be used by pseudo interface (e.g. vlan(4)),
1374 * when it tries to claim that the packet is received by it.
4ee4f753
MD
1375 *
1376 * REINPUT_KEEPRCVIF
1377 * REINPUT_RUNBPF
b9ed4403
SZ
1378 */
1379void
4ee4f753 1380ether_reinput_oncpu(struct ifnet *ifp, struct mbuf *m, int reinput_flags)
b9ed4403
SZ
1381{
1382 /* Discard packet if interface is not up */
1383 if (!(ifp->if_flags & IFF_UP)) {
1384 m_freem(m);
1385 return;
1386 }
1387
4ee4f753
MD
1388 /*
1389 * Change receiving interface. The bridge will often pass a flag to
1390 * ask that this not be done so ARPs get applied to the correct
1391 * side.
1392 */
1393 if ((reinput_flags & REINPUT_KEEPRCVIF) == 0 ||
1394 m->m_pkthdr.rcvif == NULL) {
1395 m->m_pkthdr.rcvif = ifp;
1396 }
b9ed4403
SZ
1397
1398 /* Update statistics */
1399 ifp->if_ipackets++;
1400 ifp->if_ibytes += m->m_pkthdr.len;
1401 if (m->m_flags & (M_MCAST | M_BCAST))
1402 ifp->if_imcasts++;
1403
4ee4f753 1404 if (reinput_flags & REINPUT_RUNBPF)
b9ed4403
SZ
1405 BPF_MTAP(ifp, m);
1406
1407 ether_input_oncpu(ifp, m);
1408}
1409
057441be
SZ
1410static __inline boolean_t
1411ether_vlancheck(struct mbuf **m0)
1412{
1413 struct mbuf *m = *m0;
1414 struct ether_header *eh;
1415 uint16_t ether_type;
1416
1417 eh = mtod(m, struct ether_header *);
1418 ether_type = ntohs(eh->ether_type);
1419
1420 if (ether_type == ETHERTYPE_VLAN && (m->m_flags & M_VLANTAG) == 0) {
1421 /*
1422 * Extract vlan tag if hardware does not do it for us
1423 */
1424 vlan_ether_decap(&m);
1425 if (m == NULL)
1426 goto failed;
1427
1428 eh = mtod(m, struct ether_header *);
1429 ether_type = ntohs(eh->ether_type);
1430 }
1431
1432 if (ether_type == ETHERTYPE_VLAN && (m->m_flags & M_VLANTAG)) {
1433 /*
1434 * To prevent possible dangerous recursion,
1435 * we don't do vlan-in-vlan
1436 */
1437 m->m_pkthdr.rcvif->if_noproto++;
1438 goto failed;
1439 }
1440 KKASSERT(ether_type != ETHERTYPE_VLAN);
1441
da1604af 1442 m->m_flags |= M_ETHER_VLANCHECKED;
057441be
SZ
1443 *m0 = m;
1444 return TRUE;
1445failed:
1446 if (m != NULL)
1447 m_freem(m);
1448 *m0 = NULL;
1449 return FALSE;
1450}
1451
29bc1092 1452static void
002c1265 1453ether_input_handler(netmsg_t nmsg)
29bc1092 1454{
002c1265 1455 struct netmsg_packet *nmp = &nmsg->packet; /* actual size */
828c9923 1456 struct ether_header *eh;
29bc1092
SZ
1457 struct ifnet *ifp;
1458 struct mbuf *m;
1459
1460 m = nmp->nm_packet;
1461 M_ASSERTPKTHDR(m);
1462 ifp = m->m_pkthdr.rcvif;
1463
828c9923
SZ
1464 eh = mtod(m, struct ether_header *);
1465 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
1466 if (bcmp(ifp->if_broadcastaddr, eh->ether_dhost,
1467 ifp->if_addrlen) == 0)
1468 m->m_flags |= M_BCAST;
1469 else
1470 m->m_flags |= M_MCAST;
1471 ifp->if_imcasts++;
1472 }
1473
da1604af
SZ
1474 if ((m->m_flags & M_ETHER_VLANCHECKED) == 0) {
1475 if (!ether_vlancheck(&m)) {
1476 KKASSERT(m == NULL);
1477 return;
1478 }
1479 }
1480
29bc1092
SZ
1481 ether_input_oncpu(ifp, m);
1482}
1483
c3c96e44
MD
1484/*
1485 * Send the packet to the target msgport or queue it into 'chain'.
21b74198
MD
1486 *
1487 * At this point the packet had better be characterized (M_HASH set),
1488 * so we know which cpu to send it to.
c3c96e44
MD
1489 */
1490static void
1491ether_dispatch(int isr, struct mbuf *m, struct mbuf_chain *chain)
29bc1092
SZ
1492{
1493 struct netmsg_packet *pmsg;
1494
c3c96e44 1495 KKASSERT(m->m_flags & M_HASH);
29bc1092 1496 pmsg = &m->m_hdr.mh_netmsg;
002c1265 1497 netmsg_init(&pmsg->base, NULL, &netisr_apanic_rport,
c3c96e44 1498 0, ether_input_handler);
29bc1092 1499 pmsg->nm_packet = m;
002c1265 1500 pmsg->base.lmsg.u.ms_result = isr;
74f66604
SZ
1501
1502 if (chain != NULL) {
c3c96e44 1503 int cpuid = m->m_pkthdr.hash;
74f66604 1504 struct mbuf_chain *c;
74f66604
SZ
1505
1506 c = &chain[cpuid];
1507 if (c->mc_head == NULL) {
1508 c->mc_head = c->mc_tail = m;
1509 } else {
1510 c->mc_tail->m_nextpkt = m;
1511 c->mc_tail = m;
1512 }
1513 m->m_nextpkt = NULL;
1514 } else {
002c1265 1515 lwkt_sendmsg(cpu_portfn(m->m_pkthdr.hash), &pmsg->base.lmsg);
74f66604
SZ
1516 }
1517}
1518
62f35c44
SZ
1519/*
1520 * Process a received Ethernet packet.
1521 *
1522 * The ethernet header is assumed to be in the mbuf so the caller
1523 * MUST MAKE SURE that there are at least sizeof(struct ether_header)
1524 * bytes in the first mbuf.
1525 *
62f35c44 1526 * - If 'chain' is NULL, this ether frame is sent to the target msgport
50098e2e 1527 * immediately. This situation happens when ether_input_chain is
62f35c44 1528 * accessed through ifnet.if_input.
c3c96e44 1529 *
62f35c44
SZ
1530 * - If 'chain' is not NULL, this ether frame is queued to the 'chain'
1531 * bucket indexed by the target msgport's cpuid and the target msgport
50098e2e 1532 * is saved in mbuf's m_pkthdr.m_head. Caller of ether_input_chain
62f35c44
SZ
1533 * must initialize 'chain' by calling ether_input_chain_init().
1534 * ether_input_dispatch must be called later to send ether frames
1535 * queued on 'chain' to their target msgport.
1536 */
29bc1092 1537void
2eb0d069
SZ
1538ether_input_chain(struct ifnet *ifp, struct mbuf *m, const struct pktinfo *pi,
1539 struct mbuf_chain *chain)
29bc1092 1540{
c3c96e44 1541 struct ether_header *eh;
29bc1092
SZ
1542 uint16_t ether_type;
1543 int isr;
1544
29bc1092
SZ
1545 M_ASSERTPKTHDR(m);
1546
1547 /* Discard packet if interface is not up */
1548 if (!(ifp->if_flags & IFF_UP)) {
1549 m_freem(m);
1550 return;
1551 }
1552
1553 if (m->m_len < sizeof(struct ether_header)) {
1554 /* XXX error in the caller. */
1555 m_freem(m);
1556 return;
1557 }
29bc1092
SZ
1558
1559 m->m_pkthdr.rcvif = ifp;
1560
f3e0b5f0
SZ
1561 logether(chain_beg, ifp);
1562
29bc1092
SZ
1563 ETHER_BPF_MTAP(ifp, m);
1564
1565 ifp->if_ibytes += m->m_pkthdr.len;
1566
1567 if (ifp->if_flags & IFF_MONITOR) {
828c9923
SZ
1568 eh = mtod(m, struct ether_header *);
1569 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1570 ifp->if_imcasts++;
1571
29bc1092
SZ
1572 /*
1573 * Interface marked for monitoring; discard packet.
1574 */
b5a65047 1575 m_freem(m);
f3e0b5f0
SZ
1576
1577 logether(chain_end, ifp);
b5a65047 1578 return;
29bc1092
SZ
1579 }
1580
c3c96e44
MD
1581 /*
1582 * If the packet has been characterized (pi->pi_netisr / M_HASH)
1583 * we can dispatch it immediately without further inspection.
1584 */
2eb0d069 1585 if (pi != NULL && (m->m_flags & M_HASH)) {
7c7f9646
SZ
1586#ifdef RSS_DEBUG
1587 ether_pktinfo_try++;
1588#endif
e6f77b88
SZ
1589 netisr_hashcheck(pi->pi_netisr, m, pi);
1590 if (m->m_flags & M_HASH) {
1591 ether_dispatch(pi->pi_netisr, m, chain);
7c7f9646 1592#ifdef RSS_DEBUG
e6f77b88 1593 ether_pktinfo_hit++;
7c7f9646 1594#endif
e6f77b88
SZ
1595 logether(chain_end, ifp);
1596 return;
1597 }
2eb0d069 1598 }
7c7f9646
SZ
1599#ifdef RSS_DEBUG
1600 else if (ifp->if_capenable & IFCAP_RSS) {
1601 if (pi == NULL)
1602 ether_rss_nopi++;
1603 else
1604 ether_rss_nohash++;
1605 }
1606#endif
2eb0d069
SZ
1607
1608 /*
1609 * Packet hash will be recalculated by software,
1610 * so clear the M_HASH flag set by the driver;
1611 * the hash value calculated by the hardware may
1612 * not be exactly what we want.
1613 */
1614 m->m_flags &= ~M_HASH;
1615
057441be 1616 if (!ether_vlancheck(&m)) {
057441be 1617 KKASSERT(m == NULL);
a4923720 1618 logether(chain_end, ifp);
29bc1092
SZ
1619 return;
1620 }
057441be
SZ
1621 eh = mtod(m, struct ether_header *);
1622 ether_type = ntohs(eh->ether_type);
29bc1092
SZ
1623
1624 /*
1625 * Map ether type to netisr id.
1626 */
1627 switch (ether_type) {
1628#ifdef INET
1629 case ETHERTYPE_IP:
1630 isr = NETISR_IP;
1631 break;
1632
1633 case ETHERTYPE_ARP:
1634 isr = NETISR_ARP;
1635 break;
1636#endif
1637
1638#ifdef INET6
1639 case ETHERTYPE_IPV6:
1640 isr = NETISR_IPV6;
1641 break;
1642#endif
1643
1644#ifdef IPX
1645 case ETHERTYPE_IPX:
1646 isr = NETISR_IPX;
1647 break;
1648#endif
1649
29bc1092
SZ
1650#ifdef NETATALK
1651 case ETHERTYPE_AT:
1652 isr = NETISR_ATALK1;
1653 break;
1654 case ETHERTYPE_AARP:
1655 isr = NETISR_AARP;
1656 break;
1657#endif
1658
a020e9d5
SZ
1659#ifdef MPLS
1660 case ETHERTYPE_MPLS:
1661 case ETHERTYPE_MPLS_MCAST:
cb8d752c 1662 m->m_flags |= M_MPLSLABELED;
a020e9d5
SZ
1663 isr = NETISR_MPLS;
1664 break;
1665#endif
1666
29bc1092
SZ
1667 default:
1668 /*
1669 * NETISR_MAX is an invalid value; it is chosen to let
29bc1092
SZ
1670 */
1671 isr = NETISR_MAX;
1672 break;
1673 }
1674
1675 /*
c3c96e44
MD
1676 * Ask the isr to characterize the packet since we couldn't.
1677 * This is an attempt to optimally get us onto the correct protocol
1678 * thread.
29bc1092 1679 */
c3c96e44
MD
1680 netisr_characterize(isr, &m, sizeof(struct ether_header));
1681 if (m == NULL) {
a4923720 1682 logether(chain_end, ifp);
29bc1092
SZ
1683 return;
1684 }
1685
1686 /*
c3c96e44 1687 * Finally dispatch it
29bc1092 1688 */
c3c96e44 1689 ether_dispatch(isr, m, chain);
29bc1092 1690
f3e0b5f0 1691 logether(chain_end, ifp);
29bc1092 1692}
09c280ec
SS
1693
1694MODULE_VERSION(ether, 1);