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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * 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 | * @(#)iso_snpac.c 7.14 (Berkeley) 6/27/91 | |
34 | */ | |
35 | ||
36 | /*********************************************************** | |
37 | Copyright IBM Corporation 1987 | |
38 | ||
39 | All Rights Reserved | |
40 | ||
41 | Permission to use, copy, modify, and distribute this software and its | |
42 | documentation for any purpose and without fee is hereby granted, | |
43 | provided that the above copyright notice appear in all copies and that | |
44 | both that copyright notice and this permission notice appear in | |
45 | supporting documentation, and that the name of IBM not be | |
46 | used in advertising or publicity pertaining to distribution of the | |
47 | software without specific, written prior permission. | |
48 | ||
49 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
50 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
51 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
52 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
53 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
54 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
55 | SOFTWARE. | |
56 | ||
57 | ******************************************************************/ | |
58 | ||
59 | /* | |
60 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
61 | */ | |
62 | /* $Header: iso_snpac.c,v 1.8 88/09/19 13:51:36 hagens Exp $ */ | |
63 | /* $Source: /usr/argo/sys/netiso/RCS/iso_snpac.c,v $ */ | |
64 | ||
65 | #ifdef ISO | |
66 | ||
67 | #include "types.h" | |
68 | #include "param.h" | |
69 | #include "systm.h" | |
70 | #include "mbuf.h" | |
71 | #include "domain.h" | |
72 | #include "protosw.h" | |
73 | #include "socket.h" | |
74 | #include "socketvar.h" | |
75 | #include "errno.h" | |
76 | #include "ioctl.h" | |
77 | #include "syslog.h" | |
78 | ||
79 | #include "../net/if.h" | |
80 | #include "../net/if_dl.h" | |
81 | #include "../net/route.h" | |
82 | ||
83 | #include "iso.h" | |
84 | #include "iso_var.h" | |
85 | #include "iso_snpac.h" | |
86 | #include "clnp.h" | |
87 | #include "clnp_stat.h" | |
88 | #include "esis.h" | |
89 | #include "argo_debug.h" | |
90 | ||
91 | int iso_systype = SNPA_ES; /* default to be an ES */ | |
92 | extern short esis_holding_time, esis_config_time, esis_esconfig_time; | |
93 | extern struct timeval time; | |
94 | extern int esis_config(), hz; | |
95 | static void snpac_fixdstandmask(); | |
96 | ||
97 | struct sockaddr_iso blank_siso = {sizeof(blank_siso), AF_ISO}; | |
98 | extern u_long iso_hashchar(); | |
99 | static struct sockaddr_iso | |
100 | dst = {sizeof(dst), AF_ISO}, | |
101 | gte = {sizeof(dst), AF_ISO}, | |
102 | src = {sizeof(dst), AF_ISO}, | |
103 | msk = {sizeof(dst), AF_ISO}, | |
104 | zmk = {1}; | |
105 | #define zsi blank_siso | |
106 | #define zero_isoa zsi.siso_addr | |
107 | #define zap_isoaddr(a, b) {Bzero(&a.siso_addr, sizeof(*r)); r = b; \ | |
108 | Bcopy(r, &a.siso_addr, 1 + (r)->isoa_len);} | |
109 | #define S(x) ((struct sockaddr *)&(x)) | |
110 | ||
111 | static struct sockaddr_dl blank_dl = {sizeof(blank_dl), AF_LINK}; | |
112 | static struct sockaddr_dl gte_dl; | |
113 | #define zap_linkaddr(a, b, c, i) \ | |
114 | (*a = blank_dl, bcopy(b, a->sdl_data, a->sdl_alen = c), a->sdl_index = i) | |
115 | ||
116 | /* | |
117 | * We only keep track of a single IS at a time. | |
118 | */ | |
119 | struct rtentry *known_is; | |
120 | ||
121 | /* | |
122 | * Addresses taken from NBS agreements, December 1987. | |
123 | * | |
124 | * These addresses assume on-the-wire transmission of least significant | |
125 | * bit first. This is the method used by 802.3. When these | |
126 | * addresses are passed to the token ring driver, (802.5), they | |
127 | * must be bit-swaped because 802.5 transmission order is MSb first. | |
128 | * | |
129 | * Furthermore, according to IBM Austin, these addresses are not | |
130 | * true token ring multicast addresses. More work is necessary | |
131 | * to get multicast to work right on token ring. | |
132 | * | |
133 | * Currently, the token ring driver does not handle multicast, so | |
134 | * these addresses are converted into the broadcast address in | |
135 | * lan_output() That means that if these multicast addresses change | |
136 | * the token ring driver must be altered. | |
137 | */ | |
138 | char all_es_snpa[] = { 0x09, 0x00, 0x2b, 0x00, 0x00, 0x04 }; | |
139 | char all_is_snpa[] = { 0x09, 0x00, 0x2b, 0x00, 0x00, 0x05 }; | |
140 | char all_l1is_snpa[] = {0x01, 0x80, 0xc2, 0x00, 0x00, 0x14}; | |
141 | char all_l2is_snpa[] = {0x01, 0x80, 0xc2, 0x00, 0x00, 0x15}; | |
142 | ||
143 | union sockunion { | |
144 | struct sockaddr_iso siso; | |
145 | struct sockaddr_dl sdl; | |
146 | struct sockaddr sa; | |
147 | }; | |
148 | ||
149 | /* | |
150 | * FUNCTION: llc_rtrequest | |
151 | * | |
152 | * PURPOSE: Manage routing table entries specific to LLC for ISO. | |
153 | * | |
154 | * NOTES: This does a lot of obscure magic; | |
155 | */ | |
156 | llc_rtrequest(req, rt, sa) | |
157 | int req; | |
158 | register struct rtentry *rt; | |
159 | struct sockaddr *sa; | |
160 | { | |
161 | register union sockunion *gate = (union sockunion *)rt->rt_gateway; | |
162 | register struct llinfo_llc *lc = (struct llinfo_llc *)rt->rt_llinfo, *lc2; | |
163 | struct rtentry *rt2; | |
164 | struct ifnet *ifp = rt->rt_ifp; | |
165 | int addrlen = ifp->if_addrlen; | |
166 | static struct rtentry *recursing = 0; | |
167 | #define LLC_SIZE 3 /* XXXXXX do this right later */ | |
168 | ||
169 | IFDEBUG (D_SNPA) | |
170 | printf("llc_rtrequest(%d, %x, %x)\n", req, rt, sa); | |
171 | ENDDEBUG | |
172 | if (rt->rt_flags & RTF_GATEWAY) { | |
173 | if (recursing) { | |
174 | log(LOG_DEBUG, "llc_rtrequest: gateway route points to same type %x %x\n", | |
175 | recursing, rt); | |
176 | } else switch (req) { | |
177 | case RTM_RESOLVE: | |
178 | case RTM_ADD: | |
179 | recursing = rt; | |
180 | rt->rt_llinfo = (caddr_t)rtalloc1(&gate->sa, 1); | |
181 | recursing = 0; | |
182 | if (rt->rt_rmx.rmx_mtu == 0) { | |
183 | rt->rt_rmx.rmx_mtu = | |
184 | ((rt2 = (struct rtentry *)rt->rt_llinfo) && | |
185 | (rt2->rt_rmx.rmx_mtu)) ? | |
186 | rt2->rt_rmx.rmx_mtu : | |
187 | rt->rt_ifp->if_mtu - LLC_SIZE; | |
188 | } | |
189 | return; | |
190 | ||
191 | case RTM_DELETE: | |
192 | if (lc) | |
193 | RTFREE((struct rtentry *)lc); | |
194 | rt->rt_llinfo = 0; | |
195 | } | |
196 | } else switch (req) { | |
197 | case RTM_ADD: | |
198 | /* | |
199 | * Case 1: This route may come from a route to iface with mask | |
200 | * or from a default route. | |
201 | */ | |
202 | if (rt->rt_flags & RTF_CLONING) { | |
203 | register struct ifaddr *ifa; | |
204 | register struct sockaddr *sa; | |
205 | for (ifa = ifp->if_addrlist; ifa; ifa->ifa_next) | |
206 | if ((sa = ifa->ifa_addr)->sa_family == AF_LINK) { | |
207 | if (sa->sa_len > gate->sa.sa_len) | |
208 | log(LOG_DEBUG, "llc_rtrequest: cloning address too small\n"); | |
209 | else { | |
210 | Bcopy(sa, gate, gate->sa.sa_len); | |
211 | gate->sdl.sdl_alen = 0; | |
212 | } | |
213 | break; | |
214 | } | |
215 | if (ifa == 0) | |
216 | log(LOG_DEBUG, "llc_rtrequest: can't find LL ifaddr for iface\n"); | |
217 | break; | |
218 | } | |
219 | /* FALLTHROUGH */ | |
220 | case RTM_RESOLVE: | |
221 | /* | |
222 | * Case 2: This route may come from cloning, or a manual route | |
223 | * add with a LL address. | |
224 | */ | |
225 | if (gate->sdl.sdl_family != AF_LINK) { | |
226 | log(LOG_DEBUG, "llc_rtrequest: got non-link non-gateway route\n"); | |
227 | break; | |
228 | } | |
229 | if (lc != 0) | |
230 | return; /* happens on a route change */ | |
231 | R_Malloc(lc, struct llinfo_llc *, sizeof (*lc)); | |
232 | rt->rt_llinfo = (caddr_t)lc; | |
233 | if (lc == 0) { | |
234 | log(LOG_DEBUG, "llc_rtrequest: malloc failed\n"); | |
235 | break; | |
236 | } | |
237 | Bzero(lc, sizeof(*lc)); | |
238 | lc->lc_rt = rt; | |
239 | rt->rt_flags |= RTF_LLINFO; | |
240 | insque(lc, &llinfo_llc); | |
241 | if (gate->sdl.sdl_alen == sizeof(struct esis_req) + addrlen) { | |
242 | gate->sdl.sdl_alen -= sizeof(struct esis_req); | |
243 | bcopy(addrlen + LLADDR(&gate->sdl), | |
244 | (caddr_t)&lc->lc_er, sizeof(lc->lc_er)); | |
245 | } else if (gate->sdl.sdl_alen == addrlen) | |
246 | lc->lc_flags = (SNPA_ES | SNPA_VALID | SNPA_PERM); | |
247 | break; | |
248 | case RTM_DELETE: | |
249 | if (lc == 0 || (rt->rt_flags & RTF_CLONING)) | |
250 | return; | |
251 | remque(lc); | |
252 | Free(lc); | |
253 | rt->rt_llinfo = 0; | |
254 | rt->rt_flags &= ~RTF_LLINFO; | |
255 | break; | |
256 | } | |
257 | if (rt->rt_rmx.rmx_mtu == 0) { | |
258 | rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu - LLC_SIZE; | |
259 | } | |
260 | } | |
261 | /* | |
262 | * FUNCTION: iso_snparesolve | |
263 | * | |
264 | * PURPOSE: Resolve an iso address into snpa address | |
265 | * | |
266 | * RETURNS: 0 if addr is resolved | |
267 | * errno if addr is unknown | |
268 | * | |
269 | * SIDE EFFECTS: | |
270 | * | |
271 | * NOTES: Now that we have folded the snpa cache into the routing | |
272 | * table, we know there is no snpa address known for this | |
273 | * destination. If we know of a default IS, then the address | |
274 | * of the IS is returned. If no IS is known, then return the | |
275 | * multi-cast address for "all ES" for this interface. | |
276 | * | |
277 | * NB: the last case described above constitutes the | |
278 | * query configuration function 9542, sec 6.5 | |
279 | * A mechanism is needed to prevent this function from | |
280 | * being invoked if the system is an IS. | |
281 | */ | |
282 | iso_snparesolve(ifp, dest, snpa, snpa_len) | |
283 | struct ifnet *ifp; /* outgoing interface */ | |
284 | struct sockaddr_iso *dest; /* destination */ | |
285 | caddr_t snpa; /* RESULT: snpa to be used */ | |
286 | int *snpa_len; /* RESULT: length of snpa */ | |
287 | { | |
288 | struct llinfo_llc *sc; /* ptr to snpa table entry */ | |
289 | caddr_t found_snpa; | |
290 | int addrlen; | |
291 | ||
292 | /* | |
293 | * This hack allows us to send esis packets that have the destination snpa | |
294 | * addresss embedded in the destination nsap address | |
295 | */ | |
296 | if (dest->siso_data[0] == AFI_SNA) { | |
297 | /* | |
298 | * This is a subnetwork address. Return it immediately | |
299 | */ | |
300 | IFDEBUG(D_SNPA) | |
301 | printf("iso_snparesolve: return SN address\n"); | |
302 | ENDDEBUG | |
303 | addrlen = dest->siso_nlen - 1; /* subtract size of AFI */ | |
304 | found_snpa = (caddr_t) dest->siso_data + 1; | |
305 | /* | |
306 | * If we are an IS, we can't do much with the packet; | |
307 | * Check if we know about an IS. | |
308 | */ | |
309 | } else if (iso_systype != SNPA_IS && known_is != 0 && | |
310 | (sc = (struct llinfo_llc *)known_is->rt_llinfo) && | |
311 | (sc->lc_flags & SNPA_VALID)) { | |
312 | register struct sockaddr_dl *sdl = | |
313 | (struct sockaddr_dl *)(known_is->rt_gateway); | |
314 | found_snpa = LLADDR(sdl); | |
315 | addrlen = sdl->sdl_alen; | |
316 | } else if (ifp->if_flags & IFF_BROADCAST) { | |
317 | /* | |
318 | * no IS, no match. Return "all es" multicast address for this | |
319 | * interface, as per Query Configuration Function (9542 sec 6.5) | |
320 | * | |
321 | * Note: there is a potential problem here. If the destination | |
322 | * is on the subnet and it does not respond with a ESH, but | |
323 | * does send back a TP CC, a connection could be established | |
324 | * where we always transmit the CLNP packet to "all es" | |
325 | */ | |
326 | addrlen = ifp->if_addrlen; | |
327 | found_snpa = (caddr_t)all_es_snpa; | |
328 | } else | |
329 | return (ENETUNREACH); | |
330 | bcopy(found_snpa, snpa, *snpa_len = addrlen); | |
331 | return (0); | |
332 | } | |
333 | ||
334 | ||
335 | /* | |
336 | * FUNCTION: snpac_free | |
337 | * | |
338 | * PURPOSE: free an entry in the iso address map table | |
339 | * | |
340 | * RETURNS: nothing | |
341 | * | |
342 | * SIDE EFFECTS: | |
343 | * | |
344 | * NOTES: If there is a route entry associated with cache | |
345 | * entry, then delete that as well | |
346 | */ | |
347 | snpac_free(lc) | |
348 | register struct llinfo_llc *lc; /* entry to free */ | |
349 | { | |
350 | register struct rtentry *rt = lc->lc_rt; | |
351 | register struct iso_addr *r; | |
352 | ||
353 | if (known_is == rt) | |
354 | known_is = 0; | |
355 | if (rt && (rt->rt_flags & RTF_UP) && | |
356 | (rt->rt_flags & (RTF_DYNAMIC | RTF_MODIFIED))) { | |
357 | RTFREE(rt); | |
358 | rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt), | |
359 | rt->rt_flags, (struct rtentry **)0); | |
360 | RTFREE(rt); | |
361 | } | |
362 | } | |
363 | ||
364 | /* | |
365 | * FUNCTION: snpac_add | |
366 | * | |
367 | * PURPOSE: Add an entry to the snpa cache | |
368 | * | |
369 | * RETURNS: | |
370 | * | |
371 | * SIDE EFFECTS: | |
372 | * | |
373 | * NOTES: If entry already exists, then update holding time. | |
374 | */ | |
375 | snpac_add(ifp, nsap, snpa, type, ht, nsellength) | |
376 | struct ifnet *ifp; /* interface info is related to */ | |
377 | struct iso_addr *nsap; /* nsap to add */ | |
378 | caddr_t snpa; /* translation */ | |
379 | char type; /* SNPA_IS or SNPA_ES */ | |
380 | u_short ht; /* holding time (in seconds) */ | |
381 | int nsellength; /* nsaps may differ only in trailing bytes */ | |
382 | { | |
383 | register struct llinfo_llc *lc; | |
384 | register struct rtentry *rt; | |
385 | struct rtentry *mrt = 0; | |
386 | register struct iso_addr *r; /* for zap_isoaddr macro */ | |
387 | int snpalen = min(ifp->if_addrlen, MAX_SNPALEN); | |
388 | int new_entry = 0, index = ifp->if_index; | |
389 | ||
390 | IFDEBUG(D_SNPA) | |
391 | printf("snpac_add(%x, %x, %x, %x, %x, %x)\n", | |
392 | ifp, nsap, snpa, type, ht, nsellength); | |
393 | ENDDEBUG | |
394 | zap_isoaddr(dst, nsap); | |
395 | rt = rtalloc1(S(dst), 0); | |
396 | IFDEBUG(D_SNPA) | |
397 | printf("snpac_add: rtalloc1 returns %x\n", rt); | |
398 | ENDDEBUG | |
399 | if (rt == 0) { | |
400 | struct sockaddr *netmask; | |
401 | int flags; | |
402 | add: | |
403 | if (nsellength) { | |
404 | netmask = S(msk); flags = RTF_UP; | |
405 | snpac_fixdstandmask(nsellength); | |
406 | } else { | |
407 | netmask = 0; flags = RTF_UP | RTF_HOST; | |
408 | } | |
409 | new_entry = 1; | |
410 | zap_linkaddr((>e_dl), snpa, snpalen, index); | |
411 | if (rtrequest(RTM_ADD, S(dst), S(gte_dl), netmask, flags, &mrt) || | |
412 | mrt == 0) | |
413 | return (0); | |
414 | rt = mrt; | |
415 | rt->rt_refcnt--; | |
416 | } else { | |
417 | register struct sockaddr_dl *sdl = (struct sockaddr_dl *)rt->rt_gateway; | |
418 | rt->rt_refcnt--; | |
419 | if ((rt->rt_flags & RTF_LLINFO) == 0) | |
420 | goto add; | |
421 | if (nsellength && (rt->rt_flags & RTF_HOST)) { | |
422 | if (rt->rt_refcnt == 0) { | |
423 | rtrequest(RTM_DELETE, S(dst), (struct sockaddr *)0, | |
424 | (struct sockaddr *)0, 0, (struct rtentry *)0); | |
425 | rt = 0; | |
426 | goto add; | |
427 | } else { | |
428 | static struct iso_addr nsap2; register char *cp; | |
429 | nsap2 = *nsap; | |
430 | cp = nsap2.isoa_genaddr + nsap->isoa_len - nsellength; | |
431 | while (cp < (char *)(1 + &nsap2)) | |
432 | *cp++ = 0; | |
433 | (void) snpac_add(ifp, &nsap2, snpa, type, ht, nsellength); | |
434 | } | |
435 | } | |
436 | if (sdl->sdl_family != AF_LINK || sdl->sdl_alen == 0) { | |
437 | int old_sdl_len = sdl->sdl_len; | |
438 | if (old_sdl_len < sizeof(*sdl)) { | |
439 | log(LOG_DEBUG, "snpac_add: cant make room for lladdr\n"); | |
440 | return (0); | |
441 | } | |
442 | zap_linkaddr(sdl, snpa, snpalen, index); | |
443 | sdl->sdl_len = old_sdl_len; | |
444 | new_entry = 1; | |
445 | } | |
446 | } | |
447 | if ((lc = (struct llinfo_llc *)rt->rt_llinfo) == 0) | |
448 | panic("snpac_rtrequest"); | |
449 | rt->rt_rmx.rmx_expire = ht + time.tv_sec; | |
450 | lc->lc_flags = SNPA_VALID | type; | |
451 | if (type & SNPA_IS) | |
452 | snpac_logdefis(rt); | |
453 | return (new_entry); | |
454 | } | |
455 | ||
456 | static void | |
457 | snpac_fixdstandmask(nsellength) | |
458 | { | |
459 | register char *cp = msk.siso_data, *cplim; | |
460 | ||
461 | cplim = cp + (dst.siso_nlen -= nsellength); | |
462 | msk.siso_len = cplim - (char *)&msk; | |
463 | msk.siso_nlen = 0; | |
464 | while (cp < cplim) | |
465 | *cp++ = -1; | |
466 | while (cp < (char *)msk.siso_pad) | |
467 | *cp++ = 0; | |
468 | for (cp = dst.siso_data + dst.siso_nlen; cp < (char *)dst.siso_pad; ) | |
469 | *cp++ = 0; | |
470 | } | |
471 | ||
472 | /* | |
473 | * FUNCTION: snpac_ioctl | |
474 | * | |
475 | * PURPOSE: Set/Get the system type and esis parameters | |
476 | * | |
477 | * RETURNS: 0 on success, or unix error code | |
478 | * | |
479 | * SIDE EFFECTS: | |
480 | * | |
481 | * NOTES: | |
482 | */ | |
483 | snpac_ioctl (so, cmd, data) | |
484 | struct socket *so; | |
485 | int cmd; /* ioctl to process */ | |
486 | caddr_t data; /* data for the cmd */ | |
487 | { | |
488 | register struct systype_req *rq = (struct systype_req *)data; | |
489 | ||
490 | IFDEBUG(D_IOCTL) | |
491 | if (cmd == SIOCSSTYPE) | |
492 | printf("snpac_ioctl: cmd set, type x%x, ht %d, ct %d\n", | |
493 | rq->sr_type, rq->sr_holdt, rq->sr_configt); | |
494 | else | |
495 | printf("snpac_ioctl: cmd get\n"); | |
496 | ENDDEBUG | |
497 | ||
498 | if (cmd == SIOCSSTYPE) { | |
499 | if ((so->so_state & SS_PRIV) == 0) | |
500 | return (EPERM); | |
501 | if ((rq->sr_type & (SNPA_ES|SNPA_IS)) == (SNPA_ES|SNPA_IS)) | |
502 | return(EINVAL); | |
503 | if (rq->sr_type & SNPA_ES) { | |
504 | iso_systype = SNPA_ES; | |
505 | } else if (rq->sr_type & SNPA_IS) { | |
506 | iso_systype = SNPA_IS; | |
507 | } else { | |
508 | return(EINVAL); | |
509 | } | |
510 | esis_holding_time = rq->sr_holdt; | |
511 | esis_config_time = rq->sr_configt; | |
512 | if (esis_esconfig_time != rq->sr_esconfigt) { | |
513 | untimeout(esis_config, (caddr_t)0); | |
514 | esis_esconfig_time = rq->sr_esconfigt; | |
515 | esis_config(); | |
516 | } | |
517 | } else if (cmd == SIOCGSTYPE) { | |
518 | rq->sr_type = iso_systype; | |
519 | rq->sr_holdt = esis_holding_time; | |
520 | rq->sr_configt = esis_config_time; | |
521 | rq->sr_esconfigt = esis_esconfig_time; | |
522 | } else { | |
523 | return (EINVAL); | |
524 | } | |
525 | return (0); | |
526 | } | |
527 | ||
528 | /* | |
529 | * FUNCTION: snpac_logdefis | |
530 | * | |
531 | * PURPOSE: Mark the IS passed as the default IS | |
532 | * | |
533 | * RETURNS: nothing | |
534 | * | |
535 | * SIDE EFFECTS: | |
536 | * | |
537 | * NOTES: | |
538 | */ | |
539 | snpac_logdefis(sc) | |
540 | register struct rtentry *sc; | |
541 | { | |
542 | register struct iso_addr *r; | |
543 | register struct sockaddr_dl *sdl = (struct sockaddr_dl *)sc->rt_gateway; | |
544 | register struct rtentry *rt = rtalloc1((struct sockaddr *)&zsi, 0); | |
545 | ||
546 | zap_linkaddr((>e_dl), LLADDR(sdl), sdl->sdl_alen, sdl->sdl_index); | |
547 | if (known_is == 0) | |
548 | known_is = sc; | |
549 | if (known_is != sc) { | |
550 | rtfree(known_is); | |
551 | known_is = sc; | |
552 | } | |
553 | if (rt == 0) { | |
554 | rtrequest(RTM_ADD, S(zsi), S(gte_dl), S(zmk), | |
555 | RTF_DYNAMIC|RTF_GATEWAY|RTF_CLONING, 0); | |
556 | return; | |
557 | } | |
558 | rt->rt_refcnt--; | |
559 | if (rt->rt_flags & (RTF_DYNAMIC | RTF_MODIFIED)) { | |
560 | *((struct sockaddr_dl *)rt->rt_gateway) = gte_dl; | |
561 | } | |
562 | } | |
563 | ||
564 | /* | |
565 | * FUNCTION: snpac_age | |
566 | * | |
567 | * PURPOSE: Time out snpac entries | |
568 | * | |
569 | * RETURNS: | |
570 | * | |
571 | * SIDE EFFECTS: | |
572 | * | |
573 | * NOTES: When encountering an entry for the first time, snpac_age | |
574 | * may delete up to SNPAC_AGE too many seconds. Ie. | |
575 | * if the entry is added a moment before snpac_age is | |
576 | * called, the entry will immediately have SNPAC_AGE | |
577 | * seconds taken off the holding time, even though | |
578 | * it has only been held a brief moment. | |
579 | * | |
580 | * The proper way to do this is set an expiry timeval | |
581 | * equal to current time + holding time. Then snpac_age | |
582 | * would time out entries where expiry date is older | |
583 | * than the current time. | |
584 | */ | |
585 | snpac_age() | |
586 | { | |
587 | register struct llinfo_llc *lc, *nlc; | |
588 | register struct rtentry *rt; | |
589 | ||
590 | timeout(snpac_age, (caddr_t)0, SNPAC_AGE * hz); | |
591 | ||
592 | for (lc = llinfo_llc.lc_next; lc != & llinfo_llc; lc = nlc) { | |
593 | nlc = lc->lc_next; | |
594 | if (((lc->lc_flags & SNPA_PERM) == 0) && (lc->lc_flags & SNPA_VALID)) { | |
595 | rt = lc->lc_rt; | |
596 | if (rt->rt_rmx.rmx_expire && rt->rt_rmx.rmx_expire < time.tv_sec) | |
597 | snpac_free(lc); | |
598 | else | |
599 | continue; | |
600 | } | |
601 | } | |
602 | } | |
603 | ||
604 | /* | |
605 | * FUNCTION: snpac_ownmulti | |
606 | * | |
607 | * PURPOSE: Determine if the snpa address is a multicast address | |
608 | * of the same type as the system. | |
609 | * | |
610 | * RETURNS: true or false | |
611 | * | |
612 | * SIDE EFFECTS: | |
613 | * | |
614 | * NOTES: Used by interface drivers when not in eavesdrop mode | |
615 | * as interm kludge until | |
616 | * real multicast addresses can be configured | |
617 | */ | |
618 | snpac_ownmulti(snpa, len) | |
619 | caddr_t snpa; | |
620 | u_int len; | |
621 | { | |
622 | return (((iso_systype & SNPA_ES) && | |
623 | (!bcmp(snpa, (caddr_t)all_es_snpa, len))) || | |
624 | ((iso_systype & SNPA_IS) && | |
625 | (!bcmp(snpa, (caddr_t)all_is_snpa, len)))); | |
626 | } | |
627 | ||
628 | /* | |
629 | * FUNCTION: snpac_flushifp | |
630 | * | |
631 | * PURPOSE: Flush entries associated with specific ifp | |
632 | * | |
633 | * RETURNS: nothing | |
634 | * | |
635 | * SIDE EFFECTS: | |
636 | * | |
637 | * NOTES: | |
638 | */ | |
639 | snpac_flushifp(ifp) | |
640 | struct ifnet *ifp; | |
641 | { | |
642 | register struct llinfo_llc *lc; | |
643 | ||
644 | for (lc = llinfo_llc.lc_next; lc != & llinfo_llc; lc = lc->lc_next) { | |
645 | if (lc->lc_rt->rt_ifp == ifp && (lc->lc_flags & SNPA_VALID)) | |
646 | snpac_free(lc); | |
647 | } | |
648 | } | |
649 | ||
650 | /* | |
651 | * FUNCTION: snpac_rtrequest | |
652 | * | |
653 | * PURPOSE: Make a routing request | |
654 | * | |
655 | * RETURNS: nothing | |
656 | * | |
657 | * SIDE EFFECTS: | |
658 | * | |
659 | * NOTES: In the future, this should make a request of a user | |
660 | * level routing daemon. | |
661 | */ | |
662 | snpac_rtrequest(req, host, gateway, netmask, flags, ret_nrt) | |
663 | int req; | |
664 | struct iso_addr *host; | |
665 | struct iso_addr *gateway; | |
666 | struct iso_addr *netmask; | |
667 | short flags; | |
668 | struct rtentry **ret_nrt; | |
669 | { | |
670 | register struct iso_addr *r; | |
671 | ||
672 | IFDEBUG(D_SNPA) | |
673 | printf("snpac_rtrequest: "); | |
674 | if (req == RTM_ADD) | |
675 | printf("add"); | |
676 | else if (req == RTM_DELETE) | |
677 | printf("delete"); | |
678 | else | |
679 | printf("unknown command"); | |
680 | printf(" dst: %s\n", clnp_iso_addrp(host)); | |
681 | printf("\tgateway: %s\n", clnp_iso_addrp(gateway)); | |
682 | ENDDEBUG | |
683 | ||
684 | ||
685 | zap_isoaddr(dst, host); | |
686 | zap_isoaddr(gte, gateway); | |
687 | if (netmask) { | |
688 | zap_isoaddr(msk, netmask); | |
689 | msk.siso_nlen = 0; | |
690 | msk.siso_len = msk.siso_pad - (u_char *)&msk; | |
691 | } | |
692 | ||
693 | rtrequest(req, S(dst), S(gte), (netmask ? S(msk) : (struct sockaddr *)0), | |
694 | flags, ret_nrt); | |
695 | } | |
696 | ||
697 | /* | |
698 | * FUNCTION: snpac_addrt | |
699 | * | |
700 | * PURPOSE: Associate a routing entry with an snpac entry | |
701 | * | |
702 | * RETURNS: nothing | |
703 | * | |
704 | * SIDE EFFECTS: | |
705 | * | |
706 | * NOTES: If a cache entry exists for gateway, then | |
707 | * make a routing entry (host, gateway) and associate | |
708 | * with gateway. | |
709 | * | |
710 | * If a route already exists and is different, first delete | |
711 | * it. | |
712 | * | |
713 | * This could be made more efficient by checking | |
714 | * the existing route before adding a new one. | |
715 | */ | |
716 | snpac_addrt(ifp, host, gateway, netmask) | |
717 | struct ifnet *ifp; | |
718 | struct iso_addr *host, *gateway, *netmask; | |
719 | { | |
720 | register struct iso_addr *r; | |
721 | ||
722 | zap_isoaddr(dst, host); | |
723 | zap_isoaddr(gte, gateway); | |
724 | if (netmask) { | |
725 | zap_isoaddr(msk, netmask); | |
726 | msk.siso_nlen = 0; | |
727 | msk.siso_len = msk.siso_pad - (u_char *)&msk; | |
728 | rtredirect(S(dst), S(gte), S(msk), RTF_DONE, S(gte), 0); | |
729 | } else | |
730 | rtredirect(S(dst), S(gte), (struct sockaddr *)0, | |
731 | RTF_DONE | RTF_HOST, S(gte), 0); | |
732 | } | |
733 | #endif ISO |