1 /* $NetBSD: if_atmsubr.c,v 1.10 1997/03/11 23:19:51 chuck Exp $ */
5 * Copyright (c) 1996 Charles D. Cranor and Washington University.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles D. Cranor and
19 * Washington University.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 * $FreeBSD: src/sys/net/if_atmsubr.c,v 1.10.2.1 2001/03/06 00:29:26 obrien Exp $
35 * $DragonFly: src/sys/net/if_atmsubr.c,v 1.17 2006/12/22 23:44:54 swildner Exp $
43 #include "opt_inet6.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
49 #include <sys/socket.h>
50 #include <sys/sockio.h>
51 #include <sys/errno.h>
52 #include <sys/serialize.h>
54 #include <sys/thread2.h>
57 #include <net/if_var.h>
58 #include <net/ifq_var.h>
60 #include <net/netisr.h>
61 #include <net/route.h>
62 #include <net/if_dl.h>
63 #include <net/if_types.h>
64 #include <net/if_atm.h>
66 #include <netinet/in.h>
67 #include <netinet/if_atm.h>
68 #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
69 #if defined(INET) || defined(INET6)
70 #include <netinet/in_var.h>
73 #include <netproto/natm/natm.h>
76 #ifndef ETHERTYPE_IPV6
77 #define ETHERTYPE_IPV6 0x86dd
80 #define gotoerr(e) { error = (e); goto bad;}
83 * atm_output: ATM output routine
85 * "ifp" = ATM interface to output to
86 * "m0" = the packet to output
87 * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
88 * "rt0" = the route to use
89 * returns: error code [0 == ok]
91 * note: special semantic: if (dst == NULL) then we assume "m" already
92 * has an atm_pseudohdr on it and just send it directly.
93 * [for native mode ATM output] if dst is null, then
94 * rt0 must also be NULL.
98 atm_output(struct ifnet
*ifp
, struct mbuf
*m0
, struct sockaddr
*dst
,
101 u_int16_t etype
= 0; /* if using LLC/SNAP */
103 struct atm_pseudohdr atmdst
, *ad
;
106 struct atmllc
*atmllc
;
107 struct atmllc
*llc_hdr
= NULL
;
109 struct altq_pktattr pktattr
;
111 if ((ifp
->if_flags
& (IFF_UP
|IFF_RUNNING
)) != (IFF_UP
|IFF_RUNNING
))
115 * if the queueing discipline needs packet classification,
116 * do it before prepending link headers.
118 ifq_classify(&ifp
->if_snd
, m
,
119 (dst
!= NULL
? dst
->sa_family
: AF_UNSPEC
), &pktattr
);
124 if ((rt
= rt0
) != NULL
) {
126 if (!(rt
->rt_flags
& RTF_UP
)) { /* route went down! */
127 if ((rt0
= rt
= RTALLOC1(dst
, 0)) != NULL
)
130 gotoerr(EHOSTUNREACH
);
133 if (rt
->rt_flags
& RTF_GATEWAY
) {
134 if (rt
->rt_gwroute
== NULL
)
136 if (((rt
= rt
->rt_gwroute
)->rt_flags
& RTF_UP
) == NULL
) {
137 rtfree(rt
); rt
= rt0
;
138 lookup
: rt
->rt_gwroute
= RTALLOC1(rt
->rt_gateway
, 0);
139 if ((rt
= rt
->rt_gwroute
) == NULL
)
140 gotoerr(EHOSTUNREACH
);
144 /* XXX: put RTF_REJECT code here if doing ATMARP */
149 * check for non-native ATM traffic (dst != NULL)
152 switch (dst
->sa_family
) {
153 #if defined(INET) || defined(INET6)
156 if (dst
->sa_family
== AF_INET6
)
157 etype
= htons(ETHERTYPE_IPV6
);
159 etype
= htons(ETHERTYPE_IP
);
160 if (!atmresolve(rt
, m
, dst
, &atmdst
)) {
162 /* XXX: atmresolve already free'd it */
163 gotoerr(EHOSTUNREACH
);
164 /* XXX: put ATMARP stuff here */
165 /* XXX: watch who frees m on failure */
168 #endif /* INET || INET6 */
172 * XXX: bpfwrite. assuming dst contains 12 bytes
173 * (atm pseudo header (4) + LLC/SNAP (8))
175 bcopy(dst
->sa_data
, &atmdst
, sizeof(atmdst
));
176 llc_hdr
= (struct atmllc
*)(dst
->sa_data
+ sizeof(atmdst
));
180 #if defined(__NetBSD__) || defined(__OpenBSD__)
181 kprintf("%s: can't handle af%d\n", ifp
->if_xname
,
183 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
184 kprintf("%s: can't handle af%d\n", ifp
->if_xname
,
187 gotoerr(EAFNOSUPPORT
);
191 * must add atm_pseudohdr to data
194 atm_flags
= ATM_PH_FLAGS(&atmdst
);
195 if (atm_flags
& ATM_PH_LLCSNAP
) sz
+= 8; /* sizeof snap == 8 */
196 M_PREPEND(m
, sz
, MB_DONTWAIT
);
199 ad
= mtod(m
, struct atm_pseudohdr
*);
201 if (atm_flags
& ATM_PH_LLCSNAP
) {
202 atmllc
= (struct atmllc
*)(ad
+ 1);
203 if (llc_hdr
== NULL
) {
204 bcopy(ATMLLC_HDR
, atmllc
->llchdr
,
205 sizeof(atmllc
->llchdr
));
206 ATM_LLC_SETTYPE(atmllc
, etype
);
207 /* note: already in network order */
210 bcopy(llc_hdr
, atmllc
, sizeof(struct atmllc
));
215 * Dispatch message to the interface.
217 return (ifq_handoff(ifp
, m
, &pktattr
));
226 * Process a received ATM packet;
227 * the packet is in the mbuf chain m.
230 atm_input(struct ifnet
*ifp
, struct atm_pseudohdr
*ah
, struct mbuf
*m
,
233 u_int16_t etype
= ETHERTYPE_IP
; /* default */
236 ASSERT_SERIALIZED(ifp
->if_serializer
);
238 if (!(ifp
->if_flags
& IFF_UP
)) {
242 ifp
->if_ibytes
+= m
->m_pkthdr
.len
;
246 struct natmpcb
*npcb
= rxhand
;
247 crit_enter(); /* in case 2 atm cards @ diff lvls */
248 npcb
->npcb_inq
++; /* count # in queue */
251 m
->m_pkthdr
.rcvif
= rxhand
; /* XXX: overload */
253 kprintf("atm_input: NATM detected but not configured in kernel\n");
259 * handle LLC/SNAP header, if present
261 if (ATM_PH_FLAGS(ah
) & ATM_PH_LLCSNAP
) {
263 if (m
->m_len
< sizeof(*alc
) &&
264 (m
= m_pullup(m
, sizeof(*alc
))) == NULL
)
266 alc
= mtod(m
, struct atmllc
*);
267 if (bcmp(alc
, ATMLLC_HDR
, 6)) {
268 #if defined(__NetBSD__) || defined(__OpenBSD__)
269 kprintf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
270 ifp
->if_xname
, ATM_PH_VPI(ah
), ATM_PH_VCI(ah
));
271 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
272 kprintf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
273 ifp
->if_xname
, ATM_PH_VPI(ah
), ATM_PH_VCI(ah
));
278 etype
= ATM_LLC_TYPE(alc
);
279 m_adj(m
, sizeof(*alc
));
299 netisr_dispatch(isr
, m
);
303 * Perform common duties while attaching to interface list
306 atm_ifattach(struct ifnet
*ifp
, lwkt_serialize_t serializer
)
309 struct sockaddr_dl
*sdl
;
311 ifp
->if_type
= IFT_ATM
;
314 ifp
->if_mtu
= ATMMTU
;
316 ifp
->if_input
= atm_input
;
318 ifp
->if_output
= atm_output
;
319 ifq_set_maxlen(&ifp
->if_snd
, 50);
320 if_attach(ifp
, serializer
);
322 #if defined(__NetBSD__) || defined(__OpenBSD__)
323 for (ifa
= TAILQ_FIRST(&ifp
->if_addrlist
); ifa
!= 0;
324 ifa
= TAILQ_NEXT(ifa
, ifa_list
))
325 #elif defined(__DragonFly__) || (defined(__FreeBSD__) && (__FreeBSD__ > 2))
326 for (ifa
= TAILQ_FIRST(&ifp
->if_addrhead
); ifa
;
327 ifa
= TAILQ_NEXT(ifa
, ifa_link
))
328 #elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__bsdi__)
329 for (ifa
= ifp
->if_addrlist
; ifa
; ifa
= ifa
->ifa_next
)
331 if ((sdl
= (struct sockaddr_dl
*)ifa
->ifa_addr
) &&
332 sdl
->sdl_family
== AF_LINK
) {
333 sdl
->sdl_type
= IFT_ATM
;
334 sdl
->sdl_alen
= ifp
->if_addrlen
;
335 #ifdef notyet /* if using ATMARP, store hardware address using the next line */
336 bcopy(ifp
->hw_addr
, LLADDR(sdl
), ifp
->if_addrlen
);
340 bpfattach(ifp
, DLT_ATM_RFC1483
, sizeof(struct atmllc
));