2 * Copyright (c) 1995, 1996
3 * Matt Thomas <matt@3am-software.com>. All rights reserved.
4 * Copyright (c) 1982, 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
36 * $FreeBSD: src/sys/net/if_fddisubr.c,v 1.41.2.8 2002/02/20 23:34:09 fjoe Exp $
37 * $DragonFly: src/sys/net/Attic/if_fddisubr.c,v 1.21 2006/01/14 11:05:17 swildner Exp $
40 #include "opt_atalk.h"
42 #include "opt_inet6.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
48 #include <sys/socket.h>
49 #include <sys/malloc.h>
50 #include <sys/serialize.h>
54 #include <net/netisr.h>
55 #include <net/route.h>
56 #include <net/if_llc.h>
57 #include <net/if_dl.h>
58 #include <net/if_types.h>
59 #include <net/ifq_var.h>
61 #if defined(INET) || defined(INET6)
62 #include <netinet/in.h>
63 #include <netinet/in_var.h>
64 #include <netinet/if_ether.h>
65 #include <net/ethernet.h>
68 #include <netinet6/nd6.h>
70 #if defined(__DragonFly__) || defined(__FreeBSD__)
71 #include <netinet/if_fddi.h>
73 #include <net/if_fddi.h>
77 #include <netproto/ipx/ipx.h>
78 #include <netproto/ipx/ipx_if.h>
83 #include <netns/ns_if.h>
87 #include <netdnet/dn.h>
91 #include <netproto/atalk/at.h>
92 #include <netproto/atalk/at_var.h>
93 #include <netproto/atalk/at_extern.h>
95 #define llc_snap_org_code llc_un.type_snap.org_code
96 #define llc_snap_ether_type llc_un.type_snap.ether_type
98 extern u_char at_org_code
[ 3 ];
99 extern u_char aarp_org_code
[ 3 ];
100 #endif /* NETATALK */
102 static int fddi_resolvemulti (struct ifnet
*, struct sockaddr
**,
104 static void fddi_input(struct ifnet
*, struct mbuf
*);
105 static int fddi_output(struct ifnet
*, struct mbuf
*, struct sockaddr
*,
108 #define senderr(e) { error = (e); goto bad;}
111 * This really should be defined in if_llc.h but in case it isn't.
114 #define llc_snap llc_un.type_snap
117 #if defined(__DragonFly__)
118 #define RTALLOC1(a, b) _rtlookup(a, b, b ? RTL_DOCLONE : RTL_DONTCLONE)
119 #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e)
120 #elif defined(__FreeBSD__)
121 #define RTALLOC1(a, b) rtalloc1(a, b, 0UL)
122 #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f)
125 * FDDI output routine.
126 * Encapsulate a packet of type family for the local net.
127 * Use trailer local net encapsulation if enough data in first
128 * packet leaves a multiple of 512 bytes of data in remainder.
129 * Assumes that ifp is actually pointer to arpcom structure.
132 fddi_output(struct ifnet
*ifp
, struct mbuf
*m
, struct sockaddr
*dst
,
135 struct arpcom
*ac
= (struct arpcom
*)ifp
;
137 u_char esrc
[6], edst
[6];
138 struct fddi_header
*fh
;
139 boolean_t hdrcmplt
= FALSE
;
140 int loop_copy
= 0, error
;
141 struct altq_pktattr pktattr
;
143 if ((ifp
->if_flags
& (IFF_UP
|IFF_RUNNING
)) != (IFF_UP
|IFF_RUNNING
))
147 * If the queueing discipline needs packet classification,
148 * do it before prepending link headers.
150 ifq_classify(&ifp
->if_snd
, m
, dst
->sa_family
, &pktattr
);
152 switch (dst
->sa_family
) {
155 if (!arpresolve(ifp
, rt
, m
, dst
, edst
))
156 return (0); /* if not yet resolved */
157 type
= htons(ETHERTYPE_IP
);
163 if (!nd6_storelladdr(&ac
->ac_if
, rt
, m
, dst
, (u_char
*)edst
)) {
164 /* Something bad happened */
167 type
= htons(ETHERTYPE_IPV6
);
172 type
= htons(ETHERTYPE_IPX
);
173 bcopy(&(((struct sockaddr_ipx
*)dst
)->sipx_addr
.x_host
), edst
,
179 struct at_ifaddr
*aa
;
181 if (!aarpresolve((struct arpcom
*) ifp
, m
,
182 (struct sockaddr_at
*)dst
, edst
))
186 * ifaddr is the first thing in at_ifaddr
188 if ((aa
= at_ifawithnet((struct sockaddr_at
*)dst
)) == NULL
) {
194 * In the phase 2 case, we need to prepend an mbuf
195 * for the llc header. Since we must preserve the
196 * value of m, which is passed to us by value, we
197 * m_copy() the first mbuf, and use it for our llc
200 if (aa
->aa_flags
& AFA_PHASE2
) {
203 M_PREPEND(m
, sizeof(struct llc
), MB_WAIT
);
206 llc
.llc_dsap
= llc
.llc_ssap
= LLC_SNAP_LSAP
;
207 llc
.llc_control
= LLC_UI
;
208 bcopy(at_org_code
, llc
.llc_snap_org_code
,
210 llc
.llc_snap_ether_type
= htons(ETHERTYPE_AT
);
211 bcopy(&llc
, mtod(m
, caddr_t
), sizeof(struct llc
));
214 type
= htons(ETHERTYPE_AT
);
218 #endif /* NETATALK */
221 type
= htons(ETHERTYPE_NS
);
222 bcopy(&(((struct sockaddr_ns
*)dst
)->sns_addr
.x_host
), edst
,
227 case pseudo_AF_HDRCMPLT
:
229 struct ether_header
*eh
;
232 eh
= (struct ether_header
*)dst
->sa_data
;
233 memcpy(esrc
, eh
->ether_shost
, sizeof esrc
);
239 struct ether_header
*eh
;
242 eh
= (struct ether_header
*)dst
->sa_data
;
243 memcpy(edst
, eh
->ether_dhost
, sizeof edst
);
245 m
->m_flags
|= (M_BCAST
|M_MCAST
);
246 type
= eh
->ether_type
;
252 fh
= mtod(m
, struct fddi_header
*);
253 error
= EPROTONOSUPPORT
;
254 switch (fh
->fddi_fc
& (FDDIFC_C
|FDDIFC_L
|FDDIFC_F
)) {
255 case FDDIFC_LLC_ASYNC
: {
256 /* legal priorities are 0 through 7 */
257 if ((fh
->fddi_fc
& FDDIFC_Z
) > 7)
261 case FDDIFC_LLC_SYNC
: {
262 /* FDDIFC_Z bits reserved, must be zero */
263 if (fh
->fddi_fc
& FDDIFC_Z
)
268 /* FDDIFC_Z bits must be non zero */
269 if ((fh
->fddi_fc
& FDDIFC_Z
) == 0)
274 /* anything else is too dangerous */
279 if (fh
->fddi_dhost
[0] & 1)
280 m
->m_flags
|= (M_BCAST
| M_MCAST
);
284 printf("%s: can't handle af%d\n", ifp
->if_xname
,
286 senderr(EAFNOSUPPORT
);
292 M_PREPEND(m
, sizeof(struct llc
), MB_DONTWAIT
);
295 l
= mtod(m
, struct llc
*);
296 l
->llc_control
= LLC_UI
;
297 l
->llc_dsap
= l
->llc_ssap
= LLC_SNAP_LSAP
;
298 l
->llc_snap
.org_code
[0] = l
->llc_snap
.org_code
[1] =
299 l
->llc_snap
.org_code
[2] = 0;
300 memcpy(&l
->llc_snap
.ether_type
, &type
, sizeof(u_int16_t
));
304 * Add local net header. If no space in first mbuf,
307 M_PREPEND(m
, sizeof(struct fddi_header
), MB_DONTWAIT
);
310 fh
= mtod(m
, struct fddi_header
*);
311 fh
->fddi_fc
= FDDIFC_LLC_ASYNC
|FDDIFC_LLC_PRIO4
;
312 memcpy(fh
->fddi_dhost
, edst
, sizeof edst
);
316 memcpy(fh
->fddi_shost
, esrc
, sizeof fh
->fddi_shost
);
318 memcpy(fh
->fddi_shost
, ac
->ac_enaddr
, sizeof fh
->fddi_shost
);
320 memcpy(fh->fddi_shost, ac->ac_enaddr, sizeof fh->fddi_shost);
321 * Ethernet address or a broadcast address, loopback a copy.
322 * XXX To make a simplex device behave exactly like a duplex
323 * device, we should copy in the case of sending to our own
324 * ethernet address (thus letting the original actually appear
325 * on the wire). However, we don't do that here for security
326 * reasons and compatibility with the original behavior.
328 if ((ifp
->if_flags
& IFF_SIMPLEX
) &&
330 if ((m
->m_flags
& M_BCAST
) || loop_copy
) {
331 struct mbuf
*n
= m_copypacket(m
, MB_DONTWAIT
);
333 if_simloop(ifp
, n
, dst
->sa_family
,
334 sizeof(struct fddi_header
));
335 } else if (bcmp(fh
->fddi_dhost
, fh
->fddi_shost
,
336 sizeof(fh
->fddi_shost
)) == 0) {
337 if_simloop(ifp
, m
, dst
->sa_family
,
338 sizeof(struct fddi_header
));
339 senderr(0); /* XXX */
344 * Dispatch the message to the interface.
346 return (ifq_handoff(ifp
, m
, &pktattr
));
354 * Process a received FDDI packet;
355 * the packet is in the mbuf chain m without
356 * the fddi header, which is provided separately.
359 fddi_input(struct ifnet
*ifp
, struct mbuf
*m
)
363 struct fddi_header
*fh
= mtod(m
, struct fddi_header
*);
365 ASSERT_SERIALIZED(ifp
->if_serializer
);
367 if (m
->m_len
< sizeof(struct fddi_header
)) {
368 /* XXX error in the caller. */
372 m_adj(m
, sizeof(struct fddi_header
));
373 m
->m_pkthdr
.rcvif
= ifp
;
375 if (!(ifp
->if_flags
& IFF_UP
)) {
379 getmicrotime(&ifp
->if_lastchange
);
380 ifp
->if_ibytes
+= m
->m_pkthdr
.len
+ sizeof *fh
;
381 if (fh
->fddi_dhost
[0] & 1) {
382 if (bcmp(ifp
->if_broadcastaddr
, fh
->fddi_dhost
,
383 ifp
->if_addrlen
) == 0)
384 m
->m_flags
|= M_BCAST
;
386 m
->m_flags
|= M_MCAST
;
388 } else if ((ifp
->if_flags
& IFF_PROMISC
) &&
389 bcmp(((struct arpcom
*)ifp
)->ac_enaddr
, fh
->fddi_dhost
,
390 sizeof fh
->fddi_dhost
) != 0) {
397 * If this has a LLC priority of 0, then mark it so upper
398 * layers have a hint that it really came via a FDDI/Ethernet
401 if ((fh
->fddi_fc
& FDDIFC_LLC_PRIO7
) == FDDIFC_LLC_PRIO0
)
402 m
->m_flags
|= M_LINK0
;
405 l
= mtod(m
, struct llc
*);
406 switch (l
->llc_dsap
) {
407 #if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK)
411 if (l
->llc_control
!= LLC_UI
|| l
->llc_ssap
!= LLC_SNAP_LSAP
)
414 if (bcmp(&(l
->llc_snap_org_code
)[0], at_org_code
,
415 sizeof(at_org_code
)) == 0 &&
416 sizeof(at_org_code
) == 0 &&
417 ntohs(l
->llc_snap_ether_type
) == ETHERTYPE_AT
) {
418 m_adj(m
, sizeof(struct llc
));
423 if (bcmp(&(l
->llc_snap_org_code
)[0], aarp_org_code
,
424 sizeof(aarp_org_code
)) == 0 &&
425 ntohs(l
->llc_snap_ether_type
) == ETHERTYPE_AARP
) {
426 m_adj(m
, sizeof(struct llc
));
431 if (l
->llc_snap
.org_code
[0] != 0 ||
432 l
->llc_snap
.org_code
[1] != 0 ||
433 l
->llc_snap
.org_code
[2] != 0)
435 type
= ntohs(l
->llc_snap
.ether_type
);
440 if (ipflow_fastforward(m
, ifp
->if_serializer
))
446 if (ifp
->if_flags
& IFF_NOARP
)
467 case ETHERTYPE_DECNET
:
478 #endif /* NETATALK */
480 /* printf("fddi_input: unknown protocol 0x%x\n", type); */
486 #endif /* INET || NS */
489 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
496 netisr_dispatch(isr
, m
);
500 * Perform common duties while attaching to interface list
503 #define ifa_next ifa_list.tqe_next
507 fddi_ifattach(struct ifnet
*ifp
, lwkt_serialize_t serializer
)
509 struct sockaddr_dl
*sdl
;
511 ifp
->if_input
= fddi_input
;
512 ifp
->if_output
= fddi_output
;
513 ifp
->if_type
= IFT_FDDI
;
515 ifp
->if_broadcastaddr
= fddibroadcastaddr
;
517 ifp
->if_mtu
= FDDIMTU
;
518 ifp
->if_resolvemulti
= fddi_resolvemulti
;
519 ifp
->if_baudrate
= 100000000;
520 #ifdef IFF_NOTRAILERS
521 ifp
->if_flags
|= IFF_NOTRAILERS
;
523 if_attach(ifp
, serializer
);
524 #if defined(__DragonFly__) || defined(__FreeBSD__)
525 sdl
= IF_LLSOCKADDR(ifp
);
526 sdl
->sdl_type
= IFT_FDDI
;
527 sdl
->sdl_alen
= ifp
->if_addrlen
;
528 bcopy(((struct arpcom
*)ifp
)->ac_enaddr
, LLADDR(sdl
), ifp
->if_addrlen
);
529 #elif defined(__NetBSD__)
530 LIST_INIT(&((struct arpcom
*)ifp
)->ac_multiaddrs
);
531 for (ifa
= ifp
->if_addrlist
.tqh_first
; ifa
!= NULL
; ifa
= ifa
->ifa_list
.tqe_next
)
533 for (ifa
= ifp
->if_addrlist
; ifa
!= NULL
; ifa
= ifa
->ifa_next
)
535 #if !defined(__DragonFly__) && !defined(__FreeBSD__)
536 if ((sdl
= (struct sockaddr_dl
*)ifa
->ifa_addr
) &&
537 sdl
->sdl_family
== AF_LINK
) {
538 sdl
->sdl_type
= IFT_FDDI
;
539 sdl
->sdl_alen
= ifp
->if_addrlen
;
540 bcopy(((struct arpcom
*)ifp
)->ac_enaddr
, LLADDR(sdl
),
545 bpfattach(ifp
, DLT_FDDI
, sizeof(struct fddi_header
));
549 fddi_resolvemulti(struct ifnet
*ifp
, struct sockaddr
**llsa
, struct sockaddr
*sa
)
551 struct sockaddr_dl
*sdl
;
552 struct sockaddr_in
*sin
;
554 struct sockaddr_in6
*sin6
;
558 switch(sa
->sa_family
) {
561 * No mapping needed. Just check that it's a valid MC address.
563 sdl
= (struct sockaddr_dl
*)sa
;
564 e_addr
= LLADDR(sdl
);
565 if ((e_addr
[0] & 1) != 1)
566 return EADDRNOTAVAIL
;
572 sin
= (struct sockaddr_in
*)sa
;
573 if (!IN_MULTICAST(ntohl(sin
->sin_addr
.s_addr
)))
574 return EADDRNOTAVAIL
;
575 MALLOC(sdl
, struct sockaddr_dl
*, sizeof *sdl
, M_IFMADDR
,
577 sdl
->sdl_len
= sizeof *sdl
;
578 sdl
->sdl_family
= AF_LINK
;
579 sdl
->sdl_index
= ifp
->if_index
;
580 sdl
->sdl_type
= IFT_FDDI
;
582 sdl
->sdl_alen
= ETHER_ADDR_LEN
; /* XXX */
584 e_addr
= LLADDR(sdl
);
585 ETHER_MAP_IP_MULTICAST(&sin
->sin_addr
, e_addr
);
586 *llsa
= (struct sockaddr
*)sdl
;
591 sin6
= (struct sockaddr_in6
*)sa
;
592 if (IN6_IS_ADDR_UNSPECIFIED(&sin6
->sin6_addr
)) {
594 * An IP6 address of 0 means listen to all
595 * of the Ethernet multicast address used for IP6.
596 * (This is used for multicast routers.)
598 ifp
->if_flags
|= IFF_ALLMULTI
;
602 if (!IN6_IS_ADDR_MULTICAST(&sin6
->sin6_addr
))
603 return EADDRNOTAVAIL
;
604 MALLOC(sdl
, struct sockaddr_dl
*, sizeof *sdl
, M_IFMADDR
,
606 sdl
->sdl_len
= sizeof *sdl
;
607 sdl
->sdl_family
= AF_LINK
;
608 sdl
->sdl_index
= ifp
->if_index
;
609 sdl
->sdl_type
= IFT_FDDI
;
611 sdl
->sdl_alen
= ETHER_ADDR_LEN
; /* XXX */
613 e_addr
= LLADDR(sdl
);
614 ETHER_MAP_IPV6_MULTICAST(&sin6
->sin6_addr
, e_addr
);
615 *llsa
= (struct sockaddr
*)sdl
;
621 * Well, the text isn't quite right, but it's the name