| 1 | /*********************************************************** |
| 2 | Copyright IBM Corporation 1987 |
| 3 | |
| 4 | All Rights Reserved |
| 5 | |
| 6 | Permission to use, copy, modify, and distribute this software and its |
| 7 | documentation for any purpose and without fee is hereby granted, |
| 8 | provided that the above copyright notice appear in all copies and that |
| 9 | both that copyright notice and this permission notice appear in |
| 10 | supporting documentation, and that the name of IBM not be |
| 11 | used in advertising or publicity pertaining to distribution of the |
| 12 | software without specific, written prior permission. |
| 13 | |
| 14 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 15 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 16 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 17 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 18 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 19 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 20 | SOFTWARE. |
| 21 | |
| 22 | ******************************************************************/ |
| 23 | |
| 24 | /* |
| 25 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison |
| 26 | */ |
| 27 | /* $Header: iso_snpac.c,v 1.8 88/09/19 13:51:36 hagens Exp $ */ |
| 28 | /* $Source: /usr/argo/sys/netiso/RCS/iso_snpac.c,v $ */ |
| 29 | |
| 30 | #ifndef lint |
| 31 | static char *rcsid = "$Header: iso_snpac.c,v 1.8 88/09/19 13:51:36 hagens Exp $"; |
| 32 | #endif lint |
| 33 | |
| 34 | #ifdef ISO |
| 35 | |
| 36 | #include "types.h" |
| 37 | #include "param.h" |
| 38 | #include "mbuf.h" |
| 39 | #include "domain.h" |
| 40 | #include "protosw.h" |
| 41 | #include "socket.h" |
| 42 | #include "socketvar.h" |
| 43 | #include "errno.h" |
| 44 | #include "ioctl.h" |
| 45 | #include "time.h" |
| 46 | #include "kernel.h" |
| 47 | |
| 48 | #include "../net/if.h" |
| 49 | #include "../net/route.h" |
| 50 | |
| 51 | #include "iso.h" |
| 52 | #include "iso_var.h" |
| 53 | #include "iso_snpac.h" |
| 54 | #include "clnp.h" |
| 55 | #include "clnp_stat.h" |
| 56 | #include "argo_debug.h" |
| 57 | #include "esis.h" |
| 58 | |
| 59 | #define SNPAC_BSIZ 20 /* bucket size */ |
| 60 | #define SNPAC_NB 13 /* number of buckets */ |
| 61 | #define SNPAC_SIZE (SNPAC_BSIZ * SNPAC_NB) |
| 62 | struct snpa_cache iso_snpac[SNPAC_SIZE]; |
| 63 | u_int iso_snpac_size = SNPAC_SIZE;/* for iso_map command */ |
| 64 | int iso_systype = SNPA_ES; /* default to be an ES */ |
| 65 | |
| 66 | struct sockaddr_iso blank_siso = {sizeof(blank_siso), AF_ISO}; |
| 67 | extern u_long iso_hashchar(); |
| 68 | static struct sockaddr_iso |
| 69 | dst = {sizeof(dst), AF_ISO}, |
| 70 | gte = {sizeof(dst), AF_ISO}, |
| 71 | src = {sizeof(dst), AF_ISO}, |
| 72 | msk = {sizeof(dst), AF_ISO}, |
| 73 | zmk = {1}; |
| 74 | #define zsi blank_siso |
| 75 | #define zero_isoa zsi.siso_addr |
| 76 | #define zap_isoaddr(a, b) (bzero((caddr_t)&a.siso_addr, sizeof(*r)), \ |
| 77 | ((r = b) && bcopy((caddr_t)r, (caddr_t)&a.siso_addr, 1 + (r)->isoa_len))) |
| 78 | #define S(x) ((struct sockaddr *)&(x)) |
| 79 | |
| 80 | #define SNPAC_HASH(addr) \ |
| 81 | (((u_long) iso_hashchar((caddr_t)addr, (int)addr->isoa_len)) % SNPAC_NB) |
| 82 | |
| 83 | #define SNPAC_LOOK(sc,addr) { \ |
| 84 | register n; \ |
| 85 | sc = &iso_snpac[SNPAC_HASH(addr) * SNPAC_BSIZ]; \ |
| 86 | for (n = 0 ; n < SNPAC_BSIZ ; n++,sc++) \ |
| 87 | if ((sc->sc_flags & SNPA_VALID) && \ |
| 88 | (iso_addrmatch1(&sc->sc_nsap, addr))) \ |
| 89 | break; \ |
| 90 | if (n >= SNPAC_BSIZ) \ |
| 91 | sc = 0; \ |
| 92 | } |
| 93 | |
| 94 | struct snpa_cache *snpac_new(); |
| 95 | |
| 96 | /* |
| 97 | * We only keep track of a single IS at a time. |
| 98 | */ |
| 99 | struct snpa_cache *known_is; |
| 100 | |
| 101 | /* |
| 102 | * Addresses taken from NBS agreements, December 1987. |
| 103 | * |
| 104 | * These addresses assume on-the-wire transmission of least significant |
| 105 | * bit first. This is the method used by 802.3. When these |
| 106 | * addresses are passed to the token ring driver, (802.5), they |
| 107 | * must be bit-swaped because 802.5 transmission order is MSb first. |
| 108 | * |
| 109 | * Furthermore, according to IBM Austin, these addresses are not |
| 110 | * true token ring multicast addresses. More work is necessary |
| 111 | * to get multicast to work right on token ring. |
| 112 | * |
| 113 | * Currently, the token ring driver does not handle multicast, so |
| 114 | * these addresses are converted into the broadcast address in |
| 115 | * lan_output() That means that if these multicast addresses change |
| 116 | * the token ring driver must be altered. |
| 117 | */ |
| 118 | struct snpa_cache all_es = { |
| 119 | { { 0x0 }, /* sc_nsap */ |
| 120 | 6, /* sc_len */ |
| 121 | { 0x09, 0x00, 0x2b, 0x00, 0x00, 0x04 }, /* sc_snpa */ |
| 122 | SNPA_VALID, /* sc_flags */ |
| 123 | 0 } /* sc_ht */ |
| 124 | }; |
| 125 | struct snpa_cache all_is = { |
| 126 | { { 0x0 }, /* sc_nsap */ |
| 127 | 6, /* sc_len */ |
| 128 | { 0x09, 0x00, 0x2b, 0x00, 0x00, 0x05 }, /* sc_snpa */ |
| 129 | SNPA_VALID, /* sc_flags */ |
| 130 | 0 } /* sc_ht */ |
| 131 | }; |
| 132 | |
| 133 | |
| 134 | /* |
| 135 | * FUNCTION: iso_snparesolve |
| 136 | * |
| 137 | * PURPOSE: Resolve an iso address into snpa address |
| 138 | * |
| 139 | * RETURNS: 0 if addr is resolved |
| 140 | * errno if addr is unknown |
| 141 | * |
| 142 | * SIDE EFFECTS: |
| 143 | * |
| 144 | * NOTES: If an entry is found that matches the address, that |
| 145 | * snpa is returned. If no entry is found, but an IS is |
| 146 | * known, then the address of the IS is returned. If |
| 147 | * neither an address is found that matches or an IS is |
| 148 | * known, then the multi-cast address for "all ES" for |
| 149 | * this interface is returned. |
| 150 | * |
| 151 | * NB: the last case described above constitutes the |
| 152 | * query configuration function 9542, sec 6.5 |
| 153 | * A mechanism is needed to prevent this function from |
| 154 | * being invoked if the system is an IS. |
| 155 | */ |
| 156 | iso_snparesolve(ifp, dest, snpa, snpa_len) |
| 157 | struct ifnet *ifp; /* outgoing interface */ |
| 158 | struct sockaddr_iso *dest; /* destination */ |
| 159 | char *snpa; /* RESULT: snpa to be used */ |
| 160 | int *snpa_len; /* RESULT: length of snpa */ |
| 161 | { |
| 162 | extern struct ifnet loif; /* loopback interface */ |
| 163 | struct snpa_cache *sc; /* ptr to snpa table entry */ |
| 164 | struct iso_addr *destiso; /* destination iso addr */ |
| 165 | |
| 166 | destiso = &dest->siso_addr; |
| 167 | |
| 168 | /* |
| 169 | * This hack allows us to send esis packets that have the destination snpa |
| 170 | * addresss embedded in the destination nsap address |
| 171 | */ |
| 172 | if (destiso->isoa_genaddr[0] == AFI_SNA) { |
| 173 | /* |
| 174 | * This is a subnetwork address. Return it immediately |
| 175 | */ |
| 176 | IFDEBUG(D_SNPA) |
| 177 | printf("iso_snparesolve: return SN address\n"); |
| 178 | ENDDEBUG |
| 179 | |
| 180 | *snpa_len = destiso->isoa_len - 1; /* subtract size of AFI */ |
| 181 | bcopy((caddr_t) destiso->isoa_genaddr + 1, (caddr_t)snpa, |
| 182 | (unsigned)*snpa_len); |
| 183 | return (0); |
| 184 | } |
| 185 | |
| 186 | IFDEBUG(D_SNPA) |
| 187 | printf("iso_snparesolve: resolving %s\n", clnp_iso_addrp(destiso)); |
| 188 | ENDDEBUG |
| 189 | |
| 190 | /* |
| 191 | * packet is not for us, check cache for an entry |
| 192 | */ |
| 193 | SNPAC_LOOK(sc, destiso); |
| 194 | if (sc == 0) { /* not found */ |
| 195 | /* If we are an IS, we can't do much with the packet */ |
| 196 | if (iso_systype == SNPA_IS) |
| 197 | goto bad; |
| 198 | |
| 199 | /* |
| 200 | * Check if we know about an IS |
| 201 | */ |
| 202 | if ((known_is) && (known_is->sc_flags & SNPA_VALID)) { |
| 203 | sc = known_is; |
| 204 | } else if (ifp->if_flags & IFF_BROADCAST) { |
| 205 | /* |
| 206 | * no IS, no match. Return "all es" multicast address for this |
| 207 | * interface, as per Query Configuration Function (9542 sec 6.5) |
| 208 | * |
| 209 | * Note: there is a potential problem here. If the destination |
| 210 | * is on the subnet and it does not respond with a ESH, but |
| 211 | * does send back a TP CC, a connection could be established |
| 212 | * where we always transmit the CLNP packet to "all es" |
| 213 | */ |
| 214 | sc = &all_es; |
| 215 | } else { |
| 216 | goto bad; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | bcopy((caddr_t)sc->sc_snpa, (caddr_t)snpa, sc->sc_len); |
| 221 | *snpa_len = sc->sc_len; |
| 222 | return (0); |
| 223 | |
| 224 | bad: |
| 225 | return(ENETUNREACH); |
| 226 | } |
| 227 | |
| 228 | |
| 229 | /* |
| 230 | * FUNCTION: snpac_look |
| 231 | * |
| 232 | * PURPOSE: Look up an entry in the snpa cache |
| 233 | * |
| 234 | * RETURNS: Pointer to snpa_cache structure, or null |
| 235 | * |
| 236 | * SIDE EFFECTS: |
| 237 | * |
| 238 | * NOTES: This is simply SNPAC_LOOK as a procedure. |
| 239 | */ |
| 240 | struct snpa_cache * |
| 241 | snpac_look(isoa) |
| 242 | struct iso_addr *isoa; /* destination nsap */ |
| 243 | { |
| 244 | struct snpa_cache *sc; |
| 245 | int s = splimp(); |
| 246 | |
| 247 | SNPAC_LOOK(sc, isoa); |
| 248 | |
| 249 | splx(s); |
| 250 | return(sc); |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * FUNCTION: iso_8208snparesolve |
| 255 | * |
| 256 | * PURPOSE: Find the X.121 address that corresponds to an NSAP addr |
| 257 | * |
| 258 | * RETURNS: 0 or unix errno |
| 259 | * |
| 260 | * SIDE EFFECTS: |
| 261 | * |
| 262 | * NOTES: This ought to invoke the 8208 ES-IS function |
| 263 | */ |
| 264 | iso_8208snparesolve(dest, snpa, snpa_len) |
| 265 | struct sockaddr_iso *dest; /* destination */ |
| 266 | char *snpa; /* RESULT: snpa to be used */ |
| 267 | int *snpa_len; /* RESULT: length of snpa */ |
| 268 | { |
| 269 | struct snpa_cache *sc; /* ptr to snpa table entry */ |
| 270 | struct iso_addr *destiso; /* destination iso addr */ |
| 271 | int s; |
| 272 | int err = 0; |
| 273 | |
| 274 | destiso = &dest->siso_addr; |
| 275 | |
| 276 | s = splimp(); |
| 277 | SNPAC_LOOK(sc, destiso); |
| 278 | if (sc) { |
| 279 | bcopy((caddr_t)sc->sc_snpa, (caddr_t)snpa, sc->sc_len); |
| 280 | *snpa_len = sc->sc_len; |
| 281 | } else { |
| 282 | err = ENETUNREACH; |
| 283 | } |
| 284 | splx(s); |
| 285 | return (err); |
| 286 | } |
| 287 | |
| 288 | /* |
| 289 | * FUNCTION: iso_8208snpaadd |
| 290 | * |
| 291 | * PURPOSE: Add an entry to the snpa cache |
| 292 | * |
| 293 | * RETURNS: |
| 294 | * |
| 295 | * SIDE EFFECTS: |
| 296 | * |
| 297 | * NOTES: used by cons |
| 298 | */ |
| 299 | iso_8208snpaadd(ifp, nsap, snpa, snpalen, ht) |
| 300 | struct ifnet *ifp; /* interface info is related to */ |
| 301 | struct iso_addr *nsap; /* nsap to add */ |
| 302 | caddr_t snpa; /* translation */ |
| 303 | int snpalen; /* length in bytes */ |
| 304 | short ht; /* holding time (in seconds) */ |
| 305 | { |
| 306 | snpac_add(ifp, nsap, snpa, snpalen, SNPA_ES, (u_short)ht); |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * FUNCTION: iso_8208snpadelete |
| 311 | * |
| 312 | * PURPOSE: Delete an entry from the snpa cache |
| 313 | * |
| 314 | * RETURNS: nothing |
| 315 | * |
| 316 | * SIDE EFFECTS: |
| 317 | * |
| 318 | * NOTES: used by CONS |
| 319 | */ |
| 320 | iso_8208snpadelete(nsap) |
| 321 | struct iso_addr *nsap; |
| 322 | { |
| 323 | struct snpa_cache *sc = snpac_look(nsap); |
| 324 | |
| 325 | if (sc != NULL) |
| 326 | snpac_free(sc); |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * FUNCTION: snpac_new |
| 331 | * |
| 332 | * PURPOSE: create a new entry in the iso address to ethernet |
| 333 | * address table |
| 334 | * |
| 335 | * RETURNS: pointer to newest entry |
| 336 | * |
| 337 | * SIDE EFFECTS: times out old entries if no new entries are found |
| 338 | * |
| 339 | * NOTES: If the bucket is full, then timeout the oldest entry |
| 340 | * (ie. the one with the youngest holding time) |
| 341 | */ |
| 342 | struct snpa_cache * |
| 343 | snpac_new(isoa) |
| 344 | struct iso_addr *isoa; /* iso address to enter into table */ |
| 345 | { |
| 346 | register struct snpa_cache *sc; |
| 347 | register int n; |
| 348 | int smallest_ht = 1000000; |
| 349 | struct snpa_cache *maybe; |
| 350 | |
| 351 | sc = &iso_snpac[SNPAC_HASH(isoa) * SNPAC_BSIZ]; |
| 352 | for (n = 0 ; n < SNPAC_BSIZ ; n++,sc++) { |
| 353 | |
| 354 | IFDEBUG (D_IOCTL) |
| 355 | printf("snpac_new: sc x%x ", sc); |
| 356 | |
| 357 | if (sc->sc_flags & SNPA_VALID) { |
| 358 | int i; |
| 359 | |
| 360 | printf("(valid) %s ", clnp_iso_addrp(&sc->sc_nsap)); |
| 361 | for (i=0; i<sc->sc_len; i++) |
| 362 | printf("%x%c", sc->sc_snpa[i], i < (sc->sc_len-1) ? ':' |
| 363 | : '\n'); |
| 364 | } else { |
| 365 | printf("invalid\n"); |
| 366 | } |
| 367 | ENDDEBUG |
| 368 | |
| 369 | if (sc->sc_flags & SNPA_VALID) { |
| 370 | if (sc->sc_ht < smallest_ht) { |
| 371 | smallest_ht = sc->sc_ht; |
| 372 | maybe = sc; |
| 373 | } |
| 374 | } else { |
| 375 | return sc; /* found unused slot */ |
| 376 | } |
| 377 | } |
| 378 | snpac_free(maybe); |
| 379 | return maybe; |
| 380 | } |
| 381 | /* |
| 382 | * FUNCTION: snpac_free |
| 383 | * |
| 384 | * PURPOSE: free an entry in the iso address map table |
| 385 | * |
| 386 | * RETURNS: nothing |
| 387 | * |
| 388 | * SIDE EFFECTS: |
| 389 | * |
| 390 | * NOTES: If there is a route entry associated with cache |
| 391 | * entry, then delete that as well |
| 392 | */ |
| 393 | snpac_free(sc) |
| 394 | register struct snpa_cache *sc; /* entry to free */ |
| 395 | { |
| 396 | register struct rtentry *rt; |
| 397 | register struct iso_addr *r; |
| 398 | |
| 399 | if (known_is == sc) { |
| 400 | known_is = NULL; |
| 401 | } |
| 402 | if (sc->sc_rt) { |
| 403 | zap_isoaddr(dst, (&(sc->sc_da))); |
| 404 | rt = rtalloc1((struct sockaddr *)&dst, 0); |
| 405 | if ((sc->sc_rt == rt) && (rt->rt_flags & RTF_UP) |
| 406 | && (rt->rt_flags & (RTF_DYNAMIC | RTF_MODIFIED))) { |
| 407 | RTFREE(rt); |
| 408 | rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt), |
| 409 | rt->rt_flags, (struct rtentry **)0); |
| 410 | } |
| 411 | RTFREE(rt); |
| 412 | } |
| 413 | bzero((caddr_t)sc, sizeof(struct snpa_cache)); |
| 414 | } |
| 415 | |
| 416 | /* |
| 417 | * FUNCTION: snpac_add |
| 418 | * |
| 419 | * PURPOSE: Add an entry to the snpa cache |
| 420 | * |
| 421 | * RETURNS: |
| 422 | * |
| 423 | * SIDE EFFECTS: |
| 424 | * |
| 425 | * NOTES: If entry already exists, then update holding time. |
| 426 | */ |
| 427 | snpac_add(ifp, nsap, snpa, snpalen, type, ht) |
| 428 | struct ifnet *ifp; /* interface info is related to */ |
| 429 | struct iso_addr *nsap; /* nsap to add */ |
| 430 | caddr_t snpa; /* translation */ |
| 431 | int snpalen; /* translation length */ |
| 432 | char type; /* SNPA_IS or SNPA_ES */ |
| 433 | u_short ht; /* holding time (in seconds) */ |
| 434 | { |
| 435 | struct snpa_cache *sc; |
| 436 | |
| 437 | SNPAC_LOOK(sc, nsap); |
| 438 | if (sc == NULL) { |
| 439 | sc = snpac_new(nsap); |
| 440 | sc->sc_nsap = *nsap; |
| 441 | } |
| 442 | |
| 443 | sc->sc_ht = ht; |
| 444 | |
| 445 | sc->sc_len = min(snpalen, MAX_SNPALEN); |
| 446 | bcopy(snpa, (caddr_t)sc->sc_snpa, sc->sc_len); |
| 447 | sc->sc_flags = SNPA_VALID | type; |
| 448 | sc->sc_ifp = ifp; |
| 449 | |
| 450 | if (type & SNPA_IS) |
| 451 | snpac_logdefis(sc); |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * FUNCTION: snpac_ioctl |
| 456 | * |
| 457 | * PURPOSE: handle ioctls to change the iso address map |
| 458 | * |
| 459 | * RETURNS: unix error code |
| 460 | * |
| 461 | * SIDE EFFECTS: changes the snpa_cache table declared above. |
| 462 | * |
| 463 | * NOTES: |
| 464 | */ |
| 465 | snpac_ioctl(cmd, data) |
| 466 | int cmd; /* ioctl to process */ |
| 467 | caddr_t data; /* data for the cmd */ |
| 468 | { |
| 469 | register struct snpa_req *rq = (struct snpa_req *)data; |
| 470 | register struct snpa_cache *sc; |
| 471 | register struct iso_addr *isoa; |
| 472 | int s; |
| 473 | char *type; |
| 474 | |
| 475 | switch(cmd) { |
| 476 | case SIOCSISOMAP: type = "set"; break; |
| 477 | case SIOCDISOMAP: type = "delete"; break; |
| 478 | case SIOCGISOMAP: type = "get"; break; |
| 479 | default: return(snpac_systype(cmd, data)); |
| 480 | } |
| 481 | |
| 482 | /* sanity check */ |
| 483 | if (rq->sr_len > MAX_SNPALEN) |
| 484 | return(EINVAL); |
| 485 | |
| 486 | IFDEBUG (D_IOCTL) |
| 487 | int i; |
| 488 | |
| 489 | printf("snpac_ioctl: %s %s to ", type, clnp_iso_addrp(isoa)); |
| 490 | for (i=0; i<rq->sr_len; i++) |
| 491 | printf("%x%c", rq->sr_snpa[i], i < (rq->sr_len-1) ? ':' : '\n'); |
| 492 | ENDDEBUG |
| 493 | |
| 494 | /* look up this address in table */ |
| 495 | isoa = &rq->sr_isoa; |
| 496 | |
| 497 | SNPAC_LOOK(sc, isoa); |
| 498 | if (sc == NULL) { /* not found */ |
| 499 | if (cmd != SIOCSISOMAP) |
| 500 | return(ENXIO); |
| 501 | } |
| 502 | |
| 503 | switch(cmd) { |
| 504 | case SIOCSISOMAP: /* set entry */ |
| 505 | snpac_add((struct ifnet *)NULL, isoa, (caddr_t)rq->sr_snpa, |
| 506 | (int)rq->sr_len, |
| 507 | (char)(rq->sr_flags & (SNPA_ES|SNPA_IS|SNPA_PERM)), |
| 508 | rq->sr_ht); |
| 509 | break; |
| 510 | |
| 511 | case SIOCDISOMAP: /* delete entry */ |
| 512 | snpac_free(sc); |
| 513 | break; |
| 514 | |
| 515 | case SIOCGISOMAP: /* get entry */ |
| 516 | bcopy((caddr_t)&sc->sc_sr, (caddr_t)rq, sizeof(struct snpa_req)); |
| 517 | break; |
| 518 | } |
| 519 | return(0); |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * FUNCTION: iso_tryloopback |
| 524 | * |
| 525 | * PURPOSE: Attempt to use the software loopback interface for pkt |
| 526 | * |
| 527 | * RETURNS: 0 if packet was sent successfully |
| 528 | * errno if there was a problem sending the packet |
| 529 | * Ie. the return value of looutput |
| 530 | * -1 if software loopback is not appropriate |
| 531 | * |
| 532 | * SIDE EFFECTS: |
| 533 | * |
| 534 | * NOTES: |
| 535 | */ |
| 536 | iso_tryloopback(m, dest) |
| 537 | struct mbuf *m; /* pkt */ |
| 538 | struct sockaddr_iso *dest; /* destination */ |
| 539 | { |
| 540 | struct iso_addr *destiso; /* destination iso addr */ |
| 541 | |
| 542 | destiso = &dest->siso_addr; |
| 543 | |
| 544 | if (clnp_ours(destiso)) { |
| 545 | IFDEBUG(D_SNPA) |
| 546 | printf("iso_tryloopback: local destination\n"); |
| 547 | ENDDEBUG |
| 548 | if (loif.if_flags & IFF_UP) { |
| 549 | IFDEBUG(D_SNPA) |
| 550 | printf("iso_tryloopback: calling looutput\n"); |
| 551 | ENDDEBUG |
| 552 | return (looutput(&loif, m, (struct sockaddr *)dest)); |
| 553 | } |
| 554 | } |
| 555 | return (-1); |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * FUNCTION: snpac_systype |
| 560 | * |
| 561 | * PURPOSE: Set/Get the system type and esis parameters |
| 562 | * |
| 563 | * RETURNS: 0 on success, or unix error code |
| 564 | * |
| 565 | * SIDE EFFECTS: |
| 566 | * |
| 567 | * NOTES: |
| 568 | */ |
| 569 | snpac_systype (cmd, data) |
| 570 | int cmd; /* ioctl to process */ |
| 571 | caddr_t data; /* data for the cmd */ |
| 572 | { |
| 573 | register struct systype_req *rq = (struct systype_req *)data; |
| 574 | extern short esis_holding_time, esis_config_time; |
| 575 | |
| 576 | IFDEBUG (D_IOCTL) |
| 577 | if (cmd == SIOCSSTYPE) |
| 578 | printf("snpac_systype: cmd set, type x%x, ht %d, ct %d\n", |
| 579 | rq->sr_type, rq->sr_holdt, rq->sr_configt); |
| 580 | else |
| 581 | printf("snpac_systype: cmd get\n"); |
| 582 | ENDDEBUG |
| 583 | |
| 584 | if (cmd == SIOCSSTYPE) { |
| 585 | if (!suser()) |
| 586 | return(EACCES); |
| 587 | if ((rq->sr_type & (SNPA_ES|SNPA_IS)) == (SNPA_ES|SNPA_IS)) |
| 588 | return(EINVAL); |
| 589 | if (rq->sr_type & SNPA_ES) { |
| 590 | iso_systype = SNPA_ES; |
| 591 | } else if (rq->sr_type & SNPA_IS) { |
| 592 | iso_systype = SNPA_IS; |
| 593 | } else { |
| 594 | return(EINVAL); |
| 595 | } |
| 596 | esis_holding_time = rq->sr_holdt; |
| 597 | esis_config_time = rq->sr_configt; |
| 598 | } else if (cmd == SIOCGSTYPE) { |
| 599 | rq->sr_type = iso_systype; |
| 600 | rq->sr_holdt = esis_holding_time; |
| 601 | rq->sr_configt = esis_config_time; |
| 602 | } else { |
| 603 | return(EINVAL); |
| 604 | } |
| 605 | return(0); |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * FUNCTION: snpac_logdefis |
| 610 | * |
| 611 | * PURPOSE: Mark the IS passed as the default IS |
| 612 | * |
| 613 | * RETURNS: nothing |
| 614 | * |
| 615 | * SIDE EFFECTS: |
| 616 | * |
| 617 | * NOTES: |
| 618 | */ |
| 619 | snpac_logdefis(sc) |
| 620 | register struct snpa_cache *sc; |
| 621 | { |
| 622 | register struct iso_addr *r; |
| 623 | register struct rtentry *rt = rtalloc1((struct sockaddr *)&zsi, 0); |
| 624 | if (known_is == 0) |
| 625 | known_is = sc; |
| 626 | if (known_is != sc) { |
| 627 | if (known_is->sc_rt) { |
| 628 | rtfree(known_is->sc_rt); |
| 629 | known_is->sc_rt = 0; |
| 630 | } |
| 631 | known_is = sc; |
| 632 | } |
| 633 | if (rt == 0) { |
| 634 | zap_isoaddr(dst, &(sc->sc_nsap)); |
| 635 | rtrequest(RTM_ADD, S(zsi), S(dst), S(zmk), |
| 636 | RTF_DYNAMIC|RTF_GATEWAY, &sc->sc_rt); |
| 637 | return; |
| 638 | } |
| 639 | if (rt->rt_flags & (RTF_DYNAMIC | RTF_MODIFIED)) { |
| 640 | ((struct sockaddr_iso *)rt->rt_gateway)->siso_addr = sc->sc_nsap; |
| 641 | known_is = sc; |
| 642 | sc->sc_rt = rt; |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | /* |
| 647 | * FUNCTION: snpac_age |
| 648 | * |
| 649 | * PURPOSE: Time out snpac entries |
| 650 | * |
| 651 | * RETURNS: |
| 652 | * |
| 653 | * SIDE EFFECTS: |
| 654 | * |
| 655 | * NOTES: When encountering an entry for the first time, snpac_age |
| 656 | * may delete up to SNPAC_AGE too many seconds. Ie. |
| 657 | * if the entry is added a moment before snpac_age is |
| 658 | * called, the entry will immediately have SNPAC_AGE |
| 659 | * seconds taken off the holding time, even though |
| 660 | * it has only been held a brief moment. |
| 661 | * |
| 662 | * The proper way to do this is set an expiry timeval |
| 663 | * equal to current time + holding time. Then snpac_age |
| 664 | * would time out entries where expiry date is older |
| 665 | * than the current time. |
| 666 | */ |
| 667 | snpac_age() |
| 668 | { |
| 669 | register struct snpa_cache *sc; |
| 670 | register int i; |
| 671 | |
| 672 | timeout(snpac_age, (caddr_t)0, SNPAC_AGE * hz); |
| 673 | |
| 674 | sc = &iso_snpac[0]; |
| 675 | for (i=0; i<SNPAC_SIZE; i++, sc++) { |
| 676 | if (((sc->sc_flags & SNPA_PERM) == 0) && (sc->sc_flags & SNPA_VALID)) { |
| 677 | sc->sc_ht -= SNPAC_AGE; |
| 678 | if (sc->sc_ht > 0) |
| 679 | continue; |
| 680 | else |
| 681 | snpac_free(sc); |
| 682 | } |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * FUNCTION: snpac_ownmulti |
| 688 | * |
| 689 | * PURPOSE: Determine if the snpa address is a multicast address |
| 690 | * of the same type as the system. |
| 691 | * |
| 692 | * RETURNS: true or false |
| 693 | * |
| 694 | * SIDE EFFECTS: |
| 695 | * |
| 696 | * NOTES: Used by interface drivers when not in eavesdrop mode |
| 697 | * as interm kludge until |
| 698 | * real multicast addresses can be configured |
| 699 | */ |
| 700 | snpac_ownmulti(snpa, len) |
| 701 | char *snpa; |
| 702 | int len; |
| 703 | { |
| 704 | return (((iso_systype & SNPA_ES) && |
| 705 | (!bcmp((caddr_t)snpa, (caddr_t)all_es.sc_snpa, (unsigned)len))) || |
| 706 | ((iso_systype & SNPA_IS) && |
| 707 | (!bcmp((caddr_t)snpa, (caddr_t)all_is.sc_snpa, (unsigned)len)))); |
| 708 | } |
| 709 | |
| 710 | /* |
| 711 | * FUNCTION: snpac_flushifp |
| 712 | * |
| 713 | * PURPOSE: Flush entries associated with specific ifp |
| 714 | * |
| 715 | * RETURNS: nothing |
| 716 | * |
| 717 | * SIDE EFFECTS: |
| 718 | * |
| 719 | * NOTES: |
| 720 | */ |
| 721 | snpac_flushifp(ifp) |
| 722 | struct ifnet *ifp; |
| 723 | { |
| 724 | register struct snpa_cache *sc; |
| 725 | register int i; |
| 726 | |
| 727 | sc = &iso_snpac[0]; |
| 728 | for (i=0; i<SNPAC_SIZE; i++, sc++) { |
| 729 | if ((sc->sc_ifp == ifp) && (sc->sc_flags & SNPA_VALID)) { |
| 730 | snpac_free(sc); |
| 731 | } |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | * FUNCTION: snpac_rtrequest |
| 737 | * |
| 738 | * PURPOSE: Make a routing request |
| 739 | * |
| 740 | * RETURNS: nothing |
| 741 | * |
| 742 | * SIDE EFFECTS: |
| 743 | * |
| 744 | * NOTES: In the future, this should make a request of a user |
| 745 | * level routing daemon. |
| 746 | */ |
| 747 | snpac_rtrequest(req, host, gateway, netmask, flags, ret_nrt) |
| 748 | int req; |
| 749 | struct iso_addr *host; |
| 750 | struct iso_addr *gateway; |
| 751 | struct iso_addr *netmask; |
| 752 | short flags; |
| 753 | struct rtentry **ret_nrt; |
| 754 | { |
| 755 | register struct iso_addr *r; |
| 756 | |
| 757 | IFDEBUG(D_SNPA) |
| 758 | printf("snpac_rtrequest: "); |
| 759 | if (req == RTM_ADD) |
| 760 | printf("add"); |
| 761 | else if (req == RTM_DELETE) |
| 762 | printf("delete"); |
| 763 | else |
| 764 | printf("unknown command"); |
| 765 | printf(" dst: %s\n", clnp_iso_addrp(host)); |
| 766 | printf("\tgateway: %s\n", clnp_iso_addrp(gateway)); |
| 767 | ENDDEBUG |
| 768 | |
| 769 | |
| 770 | zap_isoaddr(dst, host); |
| 771 | zap_isoaddr(gte, gateway); |
| 772 | zap_isoaddr(msk, netmask); |
| 773 | |
| 774 | rtrequest(req, S(dst), S(gte), (netmask ? S(msk) : (struct sockaddr *)0), |
| 775 | flags, ret_nrt); |
| 776 | } |
| 777 | |
| 778 | /* |
| 779 | * FUNCTION: snpac_addrt |
| 780 | * |
| 781 | * PURPOSE: Associate a routing entry with an snpac entry |
| 782 | * |
| 783 | * RETURNS: nothing |
| 784 | * |
| 785 | * SIDE EFFECTS: |
| 786 | * |
| 787 | * NOTES: If a cache entry exists for gateway, then |
| 788 | * make a routing entry (host, gateway) and associate |
| 789 | * with gateway. |
| 790 | * |
| 791 | * If a route already exists and is different, first delete |
| 792 | * it. |
| 793 | * |
| 794 | * This could be made more efficient by checking |
| 795 | * the existing route before adding a new one. |
| 796 | */ |
| 797 | snpac_addrt(host, gateway, source, netmask) |
| 798 | struct iso_addr *host, *gateway, *source, *netmask; |
| 799 | { |
| 800 | register struct snpa_cache *sc; |
| 801 | register struct iso_addr *r; |
| 802 | |
| 803 | SNPAC_LOOK(sc, gateway); |
| 804 | if (sc != NULL) { |
| 805 | bcopy((caddr_t)host, (caddr_t)&sc->sc_da, sizeof(struct iso_addr)); |
| 806 | zap_isoaddr(dst, host); |
| 807 | zap_isoaddr(gte, gateway); |
| 808 | zap_isoaddr(src, source); |
| 809 | zap_isoaddr(msk, netmask); |
| 810 | if (netmask) { |
| 811 | rtredirect(S(dst), S(gte), S(msk), RTF_DONE, S(src), &sc->sc_rt); |
| 812 | } else |
| 813 | rtredirect(S(dst), S(gte), (struct sockaddr *)0, |
| 814 | RTF_DONE | RTF_HOST, S(src), &sc->sc_rt); |
| 815 | } |
| 816 | } |
| 817 | #endif ISO |