HAMMER 60I/Many: Mirroring
[dragonfly.git] / sys / netinet / if_atm.c
blob7d1639d2142c1e78b8d2ed934237b2f14e376eae
1 /* $NetBSD: if_atm.c,v 1.6 1996/10/13 02:03:01 christos Exp $ */
3 /*
5 * Copyright (c) 1996 Charles D. Cranor and Washington University.
6 * All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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/netinet/if_atm.c,v 1.8.2.1 2001/12/20 10:30:18 ru Exp $
35 * $DragonFly: src/sys/netinet/if_atm.c,v 1.9 2006/12/22 23:57:52 swildner Exp $
39 * IP <=> ATM address resolution.
42 #include "opt_inet.h"
43 #include "opt_inet6.h"
44 #include "opt_natm.h"
46 #if defined(INET) || defined(INET6)
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/queue.h>
51 #include <sys/mbuf.h>
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
54 #include <sys/syslog.h>
56 #include <net/if.h>
57 #include <net/if_dl.h>
58 #include <net/route.h>
59 #include <net/if_atm.h>
61 #include <netinet/in.h>
62 #include <netinet/if_atm.h>
64 #ifdef NATM
65 #include <netproto/natm/natm.h>
66 #endif
69 #define SDL(s) ((struct sockaddr_dl *)s)
72 * atm_rtrequest: handle ATM rt request (in support of generic code)
73 * inputs: "req" = request code
74 * "rt" = route entry
75 * "info" = rt_addrinfo
77 void
78 atm_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
80 struct sockaddr *gate = rt->rt_gateway;
81 struct atm_pseudoioctl api;
82 #ifdef NATM
83 struct sockaddr_in *sin;
84 struct natmpcb *npcb = NULL;
85 struct atm_pseudohdr *aph;
86 #endif
87 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
88 int error;
90 if (rt->rt_flags & RTF_GATEWAY) /* link level requests only */
91 return;
93 switch (req) {
95 case RTM_RESOLVE: /* resolve: only happens when cloning */
96 kprintf("atm_rtrequest: RTM_RESOLVE request detected?\n");
97 break;
99 case RTM_ADD:
102 * route added by a command (e.g. ifconfig, route, arp...).
104 * first check to see if this is not a host route, in which
105 * case we are being called via "ifconfig" to set the address.
108 if ((rt->rt_flags & RTF_HOST) == 0) {
109 rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl);
110 gate = rt->rt_gateway;
111 SDL(gate)->sdl_type = rt->rt_ifp->if_type;
112 SDL(gate)->sdl_index = rt->rt_ifp->if_index;
113 break;
116 if ((rt->rt_flags & RTF_CLONING) != 0) {
117 kprintf("atm_rtrequest: cloning route detected?\n");
118 break;
120 if (gate->sa_family != AF_LINK ||
121 gate->sa_len < sizeof(null_sdl)) {
122 log(LOG_DEBUG, "atm_rtrequest: bad gateway value");
123 break;
126 #ifdef DIAGNOSTIC
127 if (rt->rt_ifp->if_ioctl == NULL) panic("atm null ioctl");
128 #endif
130 #ifdef NATM
132 * let native ATM know we are using this VCI/VPI
133 * (i.e. reserve it)
135 sin = (struct sockaddr_in *) rt_key(rt);
136 if (sin->sin_family != AF_INET)
137 goto failed;
138 aph = (struct atm_pseudohdr *) LLADDR(SDL(gate));
139 npcb = npcb_add(NULL, rt->rt_ifp, ATM_PH_VCI(aph),
140 ATM_PH_VPI(aph));
141 if (npcb == NULL)
142 goto failed;
143 npcb->npcb_flags |= NPCB_IP;
144 npcb->ipaddr.s_addr = sin->sin_addr.s_addr;
145 /* XXX: move npcb to llinfo when ATM ARP is ready */
146 rt->rt_llinfo = npcb;
147 rt->rt_flags |= RTF_LLINFO;
148 #endif
150 * let the lower level know this circuit is active
152 bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
153 api.rxhand = NULL;
154 lwkt_serialize_enter(rt->rt_ifp->if_serializer);
155 error = rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMENA,
156 (caddr_t)&api, NULL);
157 lwkt_serialize_exit(rt->rt_ifp->if_serializer);
158 if (error) {
159 kprintf("atm: couldn't add VC\n");
160 goto failed;
163 SDL(gate)->sdl_type = rt->rt_ifp->if_type;
164 SDL(gate)->sdl_index = rt->rt_ifp->if_index;
166 break;
168 failed:
169 #ifdef NATM
170 if (npcb) {
171 npcb_free(npcb, NPCB_DESTROY);
172 rt->rt_llinfo = NULL;
173 rt->rt_flags &= ~RTF_LLINFO;
175 #endif
176 rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *) NULL,
177 rt_mask(rt), 0, (struct rtentry **) NULL);
178 break;
180 case RTM_DELETE:
182 #ifdef NATM
184 * tell native ATM we are done with this VC
187 if (rt->rt_flags & RTF_LLINFO) {
188 npcb_free(rt->rt_llinfo, NPCB_DESTROY);
189 rt->rt_llinfo = NULL;
190 rt->rt_flags &= ~RTF_LLINFO;
192 #endif
194 * tell the lower layer to disable this circuit
197 bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
198 api.rxhand = NULL;
199 lwkt_serialize_enter(rt->rt_ifp->if_serializer);
200 rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMDIS, (caddr_t)&api,
201 (struct ucred *)NULL);
202 lwkt_serialize_exit(rt->rt_ifp->if_serializer);
203 break;
208 * atmresolve:
209 * inputs:
210 * [1] "rt" = the link level route to use (or null if need to look one up)
211 * [2] "m" = mbuf containing the data to be sent
212 * [3] "dst" = sockaddr_in (IP) address of dest.
213 * output:
214 * [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info
215 * return:
216 * 0 == resolve FAILED; note that "m" gets m_freem'd in this case
217 * 1 == resolve OK; desten contains result
219 * XXX: will need more work if we wish to support ATMARP in the kernel,
220 * but this is enough for PVCs entered via the "route" command.
224 atmresolve(struct rtentry *rt, struct mbuf *m, struct sockaddr *dst,
225 struct atm_pseudohdr *desten)
227 struct sockaddr_dl *sdl;
229 if (m->m_flags & (M_BCAST|M_MCAST)) {
230 log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped");
231 goto bad;
234 if (rt == NULL) {
235 rt = RTALLOC1(dst, 0);
236 if (rt == NULL) goto bad; /* failed */
237 rt->rt_refcnt--; /* don't keep LL references */
238 if ((rt->rt_flags & RTF_GATEWAY) != 0 ||
239 (rt->rt_flags & RTF_LLINFO) == 0 ||
240 /* XXX: are we using LLINFO? */
241 rt->rt_gateway->sa_family != AF_LINK) {
242 goto bad;
247 * note that rt_gateway is a sockaddr_dl which contains the
248 * atm_pseudohdr data structure for this route. we currently
249 * don't need any rt_llinfo info (but will if we want to support
250 * ATM ARP [c.f. if_ether.c]).
253 sdl = SDL(rt->rt_gateway);
256 * Check the address family and length is valid, the address
257 * is resolved; otherwise, try to resolve.
261 if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) {
262 bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
263 return(1); /* ok, go for it! */
267 * we got an entry, but it doesn't have valid link address
268 * info in it (it is prob. the interface route, which has
269 * sdl_alen == 0). dump packet. (fall through to "bad").
272 bad:
273 m_freem(m);
274 return(0);
276 #endif /* INET */