| 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 | * @(#)esis.c 7.19 (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 | |
| 63 | #ifdef ISO |
| 64 | |
| 65 | #include "types.h" |
| 66 | #include "param.h" |
| 67 | #include "systm.h" |
| 68 | #include "mbuf.h" |
| 69 | #include "domain.h" |
| 70 | #include "protosw.h" |
| 71 | #include "socket.h" |
| 72 | #include "socketvar.h" |
| 73 | #include "errno.h" |
| 74 | |
| 75 | #include "../net/if.h" |
| 76 | #include "../net/if_dl.h" |
| 77 | #include "../net/route.h" |
| 78 | #include "../net/raw_cb.h" |
| 79 | |
| 80 | #include "iso.h" |
| 81 | #include "iso_pcb.h" |
| 82 | #include "iso_var.h" |
| 83 | #include "iso_snpac.h" |
| 84 | #include "clnl.h" |
| 85 | #include "clnp.h" |
| 86 | #include "clnp_stat.h" |
| 87 | #include "esis.h" |
| 88 | #include "argo_debug.h" |
| 89 | #include "kernel.h" |
| 90 | |
| 91 | /* |
| 92 | * Global variables to esis implementation |
| 93 | * |
| 94 | * esis_holding_time - the holding time (sec) parameter for outgoing pdus |
| 95 | * esis_config_time - the frequency (sec) that hellos are generated |
| 96 | * esis_esconfig_time - suggested es configuration time placed in the |
| 97 | * ish. |
| 98 | * |
| 99 | */ |
| 100 | struct rawcb esis_pcb; |
| 101 | int esis_config(), snpac_age(); |
| 102 | int esis_sendspace = 2048; |
| 103 | int esis_recvspace = 2048; |
| 104 | short esis_holding_time = ESIS_HT; |
| 105 | short esis_config_time = ESIS_CONFIG; |
| 106 | short esis_esconfig_time = ESIS_CONFIG; |
| 107 | extern int iso_systype; |
| 108 | struct sockaddr_dl esis_dl = { sizeof(esis_dl), AF_LINK }; |
| 109 | extern char all_es_snpa[], all_is_snpa[]; |
| 110 | |
| 111 | #define EXTEND_PACKET(m, mhdr, cp)\ |
| 112 | if (((m)->m_next = m_getclr(M_DONTWAIT, MT_HEADER)) == NULL) {\ |
| 113 | esis_stat.es_nomem++;\ |
| 114 | m_freem(mhdr);\ |
| 115 | return;\ |
| 116 | } else {\ |
| 117 | (m) = (m)->m_next;\ |
| 118 | (cp) = mtod((m), caddr_t);\ |
| 119 | } |
| 120 | /* |
| 121 | * FUNCTION: esis_init |
| 122 | * |
| 123 | * PURPOSE: Initialize the kernel portion of esis protocol |
| 124 | * |
| 125 | * RETURNS: nothing |
| 126 | * |
| 127 | * SIDE EFFECTS: |
| 128 | * |
| 129 | * NOTES: |
| 130 | */ |
| 131 | esis_init() |
| 132 | { |
| 133 | extern struct clnl_protosw clnl_protox[256]; |
| 134 | int esis_input(), isis_input(); |
| 135 | #ifdef ISO_X25ESIS |
| 136 | int x25esis_input(); |
| 137 | #endif ISO_X25ESIS |
| 138 | |
| 139 | esis_pcb.rcb_next = esis_pcb.rcb_prev = &esis_pcb; |
| 140 | llinfo_llc.lc_next = llinfo_llc.lc_prev = &llinfo_llc; |
| 141 | |
| 142 | timeout(snpac_age, (caddr_t)0, hz); |
| 143 | timeout(esis_config, (caddr_t)0, hz); |
| 144 | |
| 145 | clnl_protox[ISO9542_ESIS].clnl_input = esis_input; |
| 146 | clnl_protox[ISO10589_ISIS].clnl_input = isis_input; |
| 147 | #ifdef ISO_X25ESIS |
| 148 | clnl_protox[ISO9542X25_ESIS].clnl_input = x25esis_input; |
| 149 | #endif ISO_X25ESIS |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * FUNCTION: esis_usrreq |
| 154 | * |
| 155 | * PURPOSE: Handle user level esis requests |
| 156 | * |
| 157 | * RETURNS: 0 or appropriate errno |
| 158 | * |
| 159 | * SIDE EFFECTS: |
| 160 | * |
| 161 | */ |
| 162 | /*ARGSUSED*/ |
| 163 | esis_usrreq(so, req, m, nam, control) |
| 164 | struct socket *so; /* socket: used only to get to this code */ |
| 165 | int req; /* request */ |
| 166 | struct mbuf *m; /* data for request */ |
| 167 | struct mbuf *nam; /* optional name */ |
| 168 | struct mbuf *control; /* optional control */ |
| 169 | { |
| 170 | struct rawcb *rp = sotorawcb(so); |
| 171 | int error = 0; |
| 172 | |
| 173 | if ((so->so_state & SS_PRIV) == 0) { |
| 174 | error = EACCES; |
| 175 | goto release; |
| 176 | } |
| 177 | if (rp == NULL && req != PRU_ATTACH) { |
| 178 | error = EINVAL; |
| 179 | goto release; |
| 180 | } |
| 181 | |
| 182 | switch (req) { |
| 183 | case PRU_ATTACH: |
| 184 | if (rp != NULL) { |
| 185 | error = EINVAL; |
| 186 | break; |
| 187 | } |
| 188 | MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); |
| 189 | if (so->so_pcb = (caddr_t)rp) { |
| 190 | bzero(so->so_pcb, sizeof(*rp)); |
| 191 | insque(rp, &esis_pcb); |
| 192 | rp->rcb_socket = so; |
| 193 | error = soreserve(so, esis_sendspace, esis_recvspace); |
| 194 | } else |
| 195 | error = ENOBUFS; |
| 196 | break; |
| 197 | |
| 198 | case PRU_SEND: |
| 199 | if (nam == NULL) { |
| 200 | error = EINVAL; |
| 201 | break; |
| 202 | } |
| 203 | /* error checking here */ |
| 204 | error = isis_output(mtod(nam,struct sockaddr_dl *), m); |
| 205 | m = NULL; |
| 206 | break; |
| 207 | |
| 208 | case PRU_DETACH: |
| 209 | raw_detach(rp); |
| 210 | break; |
| 211 | |
| 212 | case PRU_SHUTDOWN: |
| 213 | socantsendmore(so); |
| 214 | break; |
| 215 | |
| 216 | case PRU_ABORT: |
| 217 | soisdisconnected(so); |
| 218 | raw_detach(rp); |
| 219 | break; |
| 220 | |
| 221 | case PRU_SENSE: |
| 222 | return (0); |
| 223 | |
| 224 | default: |
| 225 | return (EOPNOTSUPP); |
| 226 | } |
| 227 | release: |
| 228 | if (m != NULL) |
| 229 | m_freem(m); |
| 230 | |
| 231 | return (error); |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * FUNCTION: esis_input |
| 236 | * |
| 237 | * PURPOSE: Process an incoming esis packet |
| 238 | * |
| 239 | * RETURNS: nothing |
| 240 | * |
| 241 | * SIDE EFFECTS: |
| 242 | * |
| 243 | * NOTES: |
| 244 | */ |
| 245 | esis_input(m0, shp) |
| 246 | struct mbuf *m0; /* ptr to first mbuf of pkt */ |
| 247 | struct snpa_hdr *shp; /* subnetwork header */ |
| 248 | { |
| 249 | register struct esis_fixed *pdu = mtod(m0, struct esis_fixed *); |
| 250 | register int type; |
| 251 | |
| 252 | /* |
| 253 | * check checksum if necessary |
| 254 | */ |
| 255 | if (ESIS_CKSUM_REQUIRED(pdu) && iso_check_csum(m0, (int)pdu->esis_hdr_len)) { |
| 256 | esis_stat.es_badcsum++; |
| 257 | goto bad; |
| 258 | } |
| 259 | |
| 260 | /* check version */ |
| 261 | if (pdu->esis_vers != ESIS_VERSION) { |
| 262 | esis_stat.es_badvers++; |
| 263 | goto bad; |
| 264 | } |
| 265 | type = pdu->esis_type & 0x1f; |
| 266 | switch (type) { |
| 267 | case ESIS_ESH: |
| 268 | esis_eshinput(m0, shp); |
| 269 | break; |
| 270 | |
| 271 | case ESIS_ISH: |
| 272 | esis_ishinput(m0, shp); |
| 273 | break; |
| 274 | |
| 275 | case ESIS_RD: |
| 276 | esis_rdinput(m0, shp); |
| 277 | break; |
| 278 | |
| 279 | default: |
| 280 | esis_stat.es_badtype++; |
| 281 | } |
| 282 | |
| 283 | bad: |
| 284 | if (esis_pcb.rcb_next != &esis_pcb) |
| 285 | isis_input(m0, shp); |
| 286 | else |
| 287 | m_freem(m0); |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * FUNCTION: esis_rdoutput |
| 292 | * |
| 293 | * PURPOSE: Transmit a redirect pdu |
| 294 | * |
| 295 | * RETURNS: nothing |
| 296 | * |
| 297 | * SIDE EFFECTS: |
| 298 | * |
| 299 | * NOTES: Assumes there is enough space for fixed part of header, |
| 300 | * DA, BSNPA and NET in first mbuf. |
| 301 | */ |
| 302 | esis_rdoutput(inbound_shp, inbound_m, inbound_oidx, rd_dstnsap, rt) |
| 303 | struct snpa_hdr *inbound_shp; /* snpa hdr from incoming packet */ |
| 304 | struct mbuf *inbound_m; /* incoming pkt itself */ |
| 305 | struct clnp_optidx *inbound_oidx; /* clnp options assoc with incoming pkt */ |
| 306 | struct iso_addr *rd_dstnsap; /* ultimate destination of pkt */ |
| 307 | struct rtentry *rt; /* snpa cache info regarding next hop of |
| 308 | pkt */ |
| 309 | { |
| 310 | struct mbuf *m, *m0; |
| 311 | caddr_t cp; |
| 312 | struct esis_fixed *pdu; |
| 313 | int len, total_len = 0; |
| 314 | struct sockaddr_iso siso; |
| 315 | struct ifnet *ifp = inbound_shp->snh_ifp; |
| 316 | struct sockaddr_dl *sdl; |
| 317 | struct iso_addr *rd_gwnsap; |
| 318 | |
| 319 | if (rt->rt_flags & RTF_GATEWAY) { |
| 320 | rd_gwnsap = &((struct sockaddr_iso *)rt->rt_gateway)->siso_addr; |
| 321 | rt = rtalloc1(rt->rt_gateway, 0); |
| 322 | } else |
| 323 | rd_gwnsap = &((struct sockaddr_iso *)rt_key(rt))->siso_addr; |
| 324 | if (rt == 0 || (sdl = (struct sockaddr_dl *)rt->rt_gateway) == 0 || |
| 325 | sdl->sdl_family != AF_LINK) { |
| 326 | /* maybe we should have a function that you |
| 327 | could put in the iso_ifaddr structure |
| 328 | which could translate iso_addrs into snpa's |
| 329 | where there is a known mapping for that address type */ |
| 330 | esis_stat.es_badtype++; |
| 331 | return; |
| 332 | } |
| 333 | esis_stat.es_rdsent++; |
| 334 | IFDEBUG(D_ESISOUTPUT) |
| 335 | printf("esis_rdoutput: ifp x%x (%s%d), ht %d, m x%x, oidx x%x\n", |
| 336 | ifp, ifp->if_name, ifp->if_unit, esis_holding_time, inbound_m, |
| 337 | inbound_oidx); |
| 338 | printf("\tdestination: %s\n", clnp_iso_addrp(rd_dstnsap)); |
| 339 | printf("\tredirected toward:%s\n", clnp_iso_addrp(rd_gwnsap)); |
| 340 | ENDDEBUG |
| 341 | |
| 342 | if ((m0 = m = m_gethdr(M_DONTWAIT, MT_HEADER)) == NULL) { |
| 343 | esis_stat.es_nomem++; |
| 344 | return; |
| 345 | } |
| 346 | bzero(mtod(m, caddr_t), MHLEN); |
| 347 | |
| 348 | pdu = mtod(m, struct esis_fixed *); |
| 349 | cp = (caddr_t)(pdu + 1); /*pointer arith.; 1st byte after header */ |
| 350 | len = sizeof(struct esis_fixed); |
| 351 | |
| 352 | /* |
| 353 | * Build fixed part of header |
| 354 | */ |
| 355 | pdu->esis_proto_id = ISO9542_ESIS; |
| 356 | pdu->esis_vers = ESIS_VERSION; |
| 357 | pdu->esis_type = ESIS_RD; |
| 358 | HTOC(pdu->esis_ht_msb, pdu->esis_ht_lsb, esis_holding_time); |
| 359 | |
| 360 | /* Insert destination address */ |
| 361 | (void) esis_insert_addr(&cp, &len, rd_dstnsap, m, 0); |
| 362 | |
| 363 | /* Insert the snpa of better next hop */ |
| 364 | *cp++ = sdl->sdl_alen; |
| 365 | bcopy(LLADDR(sdl), cp, sdl->sdl_alen); |
| 366 | cp += sdl->sdl_alen; |
| 367 | len += (sdl->sdl_alen + 1); |
| 368 | |
| 369 | /* |
| 370 | * If the next hop is not the destination, then it ought to be |
| 371 | * an IS and it should be inserted next. Else, set the |
| 372 | * NETL to 0 |
| 373 | */ |
| 374 | /* PHASE2 use mask from ifp of outgoing interface */ |
| 375 | if (!iso_addrmatch1(rd_dstnsap, rd_gwnsap)) { |
| 376 | /* this should not happen: |
| 377 | if ((nhop_sc->sc_flags & SNPA_IS) == 0) { |
| 378 | printf("esis_rdoutput: next hop is not dst and not an IS\n"); |
| 379 | m_freem(m0); |
| 380 | return; |
| 381 | } */ |
| 382 | (void) esis_insert_addr(&cp, &len, rd_gwnsap, m, 0); |
| 383 | } else { |
| 384 | *cp++ = 0; /* NETL */ |
| 385 | len++; |
| 386 | } |
| 387 | m->m_len = len; |
| 388 | |
| 389 | /* |
| 390 | * PHASE2 |
| 391 | * If redirect is to an IS, add an address mask. The mask to be |
| 392 | * used should be the mask present in the routing entry used to |
| 393 | * forward the original data packet. |
| 394 | */ |
| 395 | |
| 396 | /* |
| 397 | * Copy Qos, priority, or security options present in original npdu |
| 398 | */ |
| 399 | if (inbound_oidx) { |
| 400 | /* THIS CODE IS CURRENTLY (mostly) UNTESTED */ |
| 401 | int optlen = 0; |
| 402 | if (inbound_oidx->cni_qos_formatp) |
| 403 | optlen += (inbound_oidx->cni_qos_len + 2); |
| 404 | if (inbound_oidx->cni_priorp) /* priority option is 1 byte long */ |
| 405 | optlen += 3; |
| 406 | if (inbound_oidx->cni_securep) |
| 407 | optlen += (inbound_oidx->cni_secure_len + 2); |
| 408 | if (M_TRAILINGSPACE(m) < optlen) { |
| 409 | EXTEND_PACKET(m, m0, cp); |
| 410 | m->m_len = 0; |
| 411 | /* assumes MLEN > optlen */ |
| 412 | } |
| 413 | /* assume MLEN-len > optlen */ |
| 414 | /* |
| 415 | * When copying options, copy from ptr - 2 in order to grab |
| 416 | * the option code and length |
| 417 | */ |
| 418 | if (inbound_oidx->cni_qos_formatp) { |
| 419 | bcopy(mtod(inbound_m, caddr_t) + inbound_oidx->cni_qos_formatp - 2, |
| 420 | cp, (unsigned)(inbound_oidx->cni_qos_len + 2)); |
| 421 | cp += inbound_oidx->cni_qos_len + 2; |
| 422 | } |
| 423 | if (inbound_oidx->cni_priorp) { |
| 424 | bcopy(mtod(inbound_m, caddr_t) + inbound_oidx->cni_priorp - 2, |
| 425 | cp, 3); |
| 426 | cp += 3; |
| 427 | } |
| 428 | if (inbound_oidx->cni_securep) { |
| 429 | bcopy(mtod(inbound_m, caddr_t) + inbound_oidx->cni_securep - 2, cp, |
| 430 | (unsigned)(inbound_oidx->cni_secure_len + 2)); |
| 431 | cp += inbound_oidx->cni_secure_len + 2; |
| 432 | } |
| 433 | m->m_len += optlen; |
| 434 | len += optlen; |
| 435 | } |
| 436 | |
| 437 | pdu->esis_hdr_len = m0->m_pkthdr.len = len; |
| 438 | iso_gen_csum(m0, ESIS_CKSUM_OFF, (int)pdu->esis_hdr_len); |
| 439 | |
| 440 | bzero((caddr_t)&siso, sizeof(siso)); |
| 441 | siso.siso_family = AF_ISO; |
| 442 | siso.siso_data[0] = AFI_SNA; |
| 443 | siso.siso_nlen = 6 + 1; /* should be taken from snpa_hdr */ |
| 444 | /* +1 is for AFI */ |
| 445 | bcopy(inbound_shp->snh_shost, siso.siso_data + 1, 6); |
| 446 | (ifp->if_output)(ifp, m0, &siso, 0); |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * FUNCTION: esis_insert_addr |
| 451 | * |
| 452 | * PURPOSE: Insert an iso_addr into a buffer |
| 453 | * |
| 454 | * RETURNS: true if buffer was big enough, else false |
| 455 | * |
| 456 | * SIDE EFFECTS: Increment buf & len according to size of iso_addr |
| 457 | * |
| 458 | * NOTES: Plus 1 here is for length byte |
| 459 | */ |
| 460 | esis_insert_addr(buf, len, isoa, m, nsellen) |
| 461 | register caddr_t *buf; /* ptr to buffer to put address into */ |
| 462 | int *len; /* ptr to length of buffer so far */ |
| 463 | register struct iso_addr *isoa; /* ptr to address */ |
| 464 | register struct mbuf *m; /* determine if there remains space */ |
| 465 | int nsellen; |
| 466 | { |
| 467 | register int newlen, result = 0; |
| 468 | |
| 469 | isoa->isoa_len -= nsellen; |
| 470 | newlen = isoa->isoa_len + 1; |
| 471 | if (newlen <= M_TRAILINGSPACE(m)) { |
| 472 | bcopy((caddr_t)isoa, *buf, newlen); |
| 473 | *len += newlen; |
| 474 | *buf += newlen; |
| 475 | m->m_len += newlen; |
| 476 | result = 1; |
| 477 | } |
| 478 | isoa->isoa_len += nsellen; |
| 479 | return (result); |
| 480 | } |
| 481 | |
| 482 | #define ESIS_EXTRACT_ADDR(d, b) { d = (struct iso_addr *)(b); b += (1 + *b); \ |
| 483 | if (b > buflim) {esis_stat.es_toosmall++; goto bad;}} |
| 484 | #define ESIS_NEXT_OPTION(b) { b += (2 + b[1]); \ |
| 485 | if (b > buflim) {esis_stat.es_toosmall++; goto bad;}} |
| 486 | int ESHonly = 0; |
| 487 | /* |
| 488 | |
| 489 | /* |
| 490 | * FUNCTION: esis_eshinput |
| 491 | * |
| 492 | * PURPOSE: Process an incoming ESH pdu |
| 493 | * |
| 494 | * RETURNS: nothing |
| 495 | * |
| 496 | * SIDE EFFECTS: |
| 497 | * |
| 498 | * NOTES: |
| 499 | */ |
| 500 | esis_eshinput(m, shp) |
| 501 | struct mbuf *m; /* esh pdu */ |
| 502 | struct snpa_hdr *shp; /* subnetwork header */ |
| 503 | { |
| 504 | struct esis_fixed *pdu = mtod(m, struct esis_fixed *); |
| 505 | u_short ht; /* holding time */ |
| 506 | struct iso_addr *nsap; |
| 507 | int naddr; |
| 508 | u_char *buf = (u_char *)(pdu + 1); |
| 509 | u_char *buflim = pdu->esis_hdr_len + (u_char *)pdu; |
| 510 | int new_entry = 0; |
| 511 | |
| 512 | esis_stat.es_eshrcvd++; |
| 513 | |
| 514 | CTOH(pdu->esis_ht_msb, pdu->esis_ht_lsb, ht); |
| 515 | |
| 516 | naddr = *buf++; |
| 517 | if (buf >= buflim) |
| 518 | goto bad; |
| 519 | if (naddr == 1) { |
| 520 | ESIS_EXTRACT_ADDR(nsap, buf); |
| 521 | new_entry = snpac_add(shp->snh_ifp, |
| 522 | nsap, shp->snh_shost, SNPA_ES, ht, 0); |
| 523 | } else { |
| 524 | int nsellength = 0, nlen = 0; |
| 525 | { |
| 526 | /* See if we want to compress out multiple nsaps differing |
| 527 | only by nsel */ |
| 528 | register struct ifaddr *ifa = shp->snh_ifp->if_addrlist; |
| 529 | for (; ifa; ifa = ifa->ifa_next) |
| 530 | if (ifa->ifa_addr->sa_family == AF_ISO) { |
| 531 | nsellength = ((struct iso_ifaddr *)ifa)->ia_addr.siso_tlen; |
| 532 | break; |
| 533 | } |
| 534 | } |
| 535 | IFDEBUG(D_ESISINPUT) |
| 536 | printf("esis_eshinput: esh: ht %d, naddr %d nsellength %d\n", |
| 537 | ht, naddr, nsellength); |
| 538 | ENDDEBUG |
| 539 | while (naddr-- > 0) { |
| 540 | struct iso_addr *nsap2; u_char *buf2; |
| 541 | ESIS_EXTRACT_ADDR(nsap, buf); |
| 542 | /* see if there is at least one more nsap in ESH differing |
| 543 | only by nsel */ |
| 544 | if (nsellength != 0) for (buf2 = buf; buf2 < buflim;) { |
| 545 | ESIS_EXTRACT_ADDR(nsap2, buf2); |
| 546 | IFDEBUG(D_ESISINPUT) |
| 547 | printf("esis_eshinput: comparing %s ", |
| 548 | clnp_iso_addrp(nsap)); |
| 549 | printf("and %s\n", clnp_iso_addrp(nsap2)); |
| 550 | ENDDEBUG |
| 551 | if (Bcmp(nsap->isoa_genaddr, nsap2->isoa_genaddr, |
| 552 | nsap->isoa_len - nsellength) == 0) { |
| 553 | nlen = nsellength; |
| 554 | break; |
| 555 | } |
| 556 | } |
| 557 | new_entry |= snpac_add(shp->snh_ifp, |
| 558 | nsap, shp->snh_shost, SNPA_ES, ht, nlen); |
| 559 | nlen = 0; |
| 560 | } |
| 561 | } |
| 562 | IFDEBUG(D_ESISINPUT) |
| 563 | printf("esis_eshinput: nsap %s is %s\n", |
| 564 | clnp_iso_addrp(nsap), new_entry ? "new" : "old"); |
| 565 | ENDDEBUG |
| 566 | if (new_entry && (iso_systype & SNPA_IS)) |
| 567 | esis_shoutput(shp->snh_ifp, ESIS_ISH, esis_holding_time, |
| 568 | shp->snh_shost, 6, (struct iso_addr *)0); |
| 569 | bad: |
| 570 | return; |
| 571 | } |
| 572 | |
| 573 | /* |
| 574 | * FUNCTION: esis_ishinput |
| 575 | * |
| 576 | * PURPOSE: process an incoming ISH pdu |
| 577 | * |
| 578 | * RETURNS: |
| 579 | * |
| 580 | * SIDE EFFECTS: |
| 581 | * |
| 582 | * NOTES: |
| 583 | */ |
| 584 | esis_ishinput(m, shp) |
| 585 | struct mbuf *m; /* esh pdu */ |
| 586 | struct snpa_hdr *shp; /* subnetwork header */ |
| 587 | { |
| 588 | struct esis_fixed *pdu = mtod(m, struct esis_fixed *); |
| 589 | u_short ht, newct; /* holding time */ |
| 590 | struct iso_addr *nsap; /* Network Entity Title */ |
| 591 | register u_char *buf = (u_char *) (pdu + 1); |
| 592 | register u_char *buflim = pdu->esis_hdr_len + (u_char *)pdu; |
| 593 | int new_entry; |
| 594 | |
| 595 | esis_stat.es_ishrcvd++; |
| 596 | CTOH(pdu->esis_ht_msb, pdu->esis_ht_lsb, ht); |
| 597 | |
| 598 | IFDEBUG(D_ESISINPUT) |
| 599 | printf("esis_ishinput: ish: ht %d\n", ht); |
| 600 | ENDDEBUG |
| 601 | if (ESHonly) |
| 602 | goto bad; |
| 603 | |
| 604 | ESIS_EXTRACT_ADDR(nsap, buf); |
| 605 | |
| 606 | while (buf < buflim) { |
| 607 | switch (*buf) { |
| 608 | case ESISOVAL_ESCT: |
| 609 | if (iso_systype & SNPA_IS) |
| 610 | break; |
| 611 | if (buf[1] != 2) |
| 612 | goto bad; |
| 613 | CTOH(buf[2], buf[3], newct); |
| 614 | if (esis_config_time != newct) { |
| 615 | untimeout(esis_config,0); |
| 616 | esis_config_time = newct; |
| 617 | esis_config(); |
| 618 | } |
| 619 | break; |
| 620 | |
| 621 | default: |
| 622 | printf("Unknown ISH option: %x\n", *buf); |
| 623 | } |
| 624 | ESIS_NEXT_OPTION(buf); |
| 625 | } |
| 626 | new_entry = snpac_add(shp->snh_ifp, nsap, shp->snh_shost, SNPA_IS, ht, 0); |
| 627 | IFDEBUG(D_ESISINPUT) |
| 628 | printf("esis_ishinput: nsap %s is %s\n", |
| 629 | clnp_iso_addrp(nsap), new_entry ? "new" : "old"); |
| 630 | ENDDEBUG |
| 631 | |
| 632 | if (new_entry) |
| 633 | esis_shoutput(shp->snh_ifp, |
| 634 | iso_systype & SNPA_ES ? ESIS_ESH : ESIS_ISH, |
| 635 | esis_holding_time, shp->snh_shost, 6, (struct iso_addr *)0); |
| 636 | bad: |
| 637 | return; |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * FUNCTION: esis_rdinput |
| 642 | * |
| 643 | * PURPOSE: Process an incoming RD pdu |
| 644 | * |
| 645 | * RETURNS: |
| 646 | * |
| 647 | * SIDE EFFECTS: |
| 648 | * |
| 649 | * NOTES: |
| 650 | */ |
| 651 | esis_rdinput(m0, shp) |
| 652 | struct mbuf *m0; /* esh pdu */ |
| 653 | struct snpa_hdr *shp; /* subnetwork header */ |
| 654 | { |
| 655 | struct esis_fixed *pdu = mtod(m0, struct esis_fixed *); |
| 656 | u_short ht; /* holding time */ |
| 657 | struct iso_addr *da, *net = 0, *netmask = 0, *snpamask = 0; |
| 658 | register struct iso_addr *bsnpa; |
| 659 | register u_char *buf = (u_char *)(pdu + 1); |
| 660 | register u_char *buflim = pdu->esis_hdr_len + (u_char *)pdu; |
| 661 | |
| 662 | esis_stat.es_rdrcvd++; |
| 663 | |
| 664 | /* intermediate systems ignore redirects */ |
| 665 | if (iso_systype & SNPA_IS) |
| 666 | return; |
| 667 | if (ESHonly) |
| 668 | return; |
| 669 | |
| 670 | CTOH(pdu->esis_ht_msb, pdu->esis_ht_lsb, ht); |
| 671 | if (buf >= buflim) |
| 672 | return; |
| 673 | |
| 674 | /* Extract DA */ |
| 675 | ESIS_EXTRACT_ADDR(da, buf); |
| 676 | |
| 677 | /* Extract better snpa */ |
| 678 | ESIS_EXTRACT_ADDR(bsnpa, buf); |
| 679 | |
| 680 | /* Extract NET if present */ |
| 681 | if (buf < buflim) { |
| 682 | if (*buf == 0) |
| 683 | buf++; /* no NET present, skip NETL anyway */ |
| 684 | else |
| 685 | ESIS_EXTRACT_ADDR(net, buf); |
| 686 | } |
| 687 | |
| 688 | /* process options */ |
| 689 | while (buf < buflim) { |
| 690 | switch (*buf) { |
| 691 | case ESISOVAL_SNPAMASK: |
| 692 | if (snpamask) /* duplicate */ |
| 693 | return; |
| 694 | snpamask = (struct iso_addr *)(buf + 1); |
| 695 | break; |
| 696 | |
| 697 | case ESISOVAL_NETMASK: |
| 698 | if (netmask) /* duplicate */ |
| 699 | return; |
| 700 | netmask = (struct iso_addr *)(buf + 1); |
| 701 | break; |
| 702 | |
| 703 | default: |
| 704 | printf("Unknown option in ESIS RD (0x%x)\n", buf[-1]); |
| 705 | } |
| 706 | ESIS_NEXT_OPTION(buf); |
| 707 | } |
| 708 | |
| 709 | IFDEBUG(D_ESISINPUT) |
| 710 | printf("esis_rdinput: rd: ht %d, da %s\n", ht, clnp_iso_addrp(da)); |
| 711 | if (net) |
| 712 | printf("\t: net %s\n", clnp_iso_addrp(net)); |
| 713 | ENDDEBUG |
| 714 | /* |
| 715 | * If netl is zero, then redirect is to an ES. We need to add an entry |
| 716 | * to the snpa cache for (destination, better snpa). |
| 717 | * If netl is not zero, then the redirect is to an IS. In this |
| 718 | * case, add an snpa cache entry for (net, better snpa). |
| 719 | * |
| 720 | * If the redirect is to an IS, add a route entry towards that |
| 721 | * IS. |
| 722 | */ |
| 723 | if (net == 0 || net->isoa_len == 0 || snpamask) { |
| 724 | /* redirect to an ES */ |
| 725 | snpac_add(shp->snh_ifp, da, |
| 726 | bsnpa->isoa_genaddr, SNPA_ES, ht, 0); |
| 727 | } else { |
| 728 | snpac_add(shp->snh_ifp, net, |
| 729 | bsnpa->isoa_genaddr, SNPA_IS, ht, 0); |
| 730 | snpac_addrt(shp->snh_ifp, da, net, netmask); |
| 731 | } |
| 732 | bad: ; /* Needed by ESIS_NEXT_OPTION */ |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | * FUNCTION: esis_config |
| 737 | * |
| 738 | * PURPOSE: Report configuration |
| 739 | * |
| 740 | * RETURNS: |
| 741 | * |
| 742 | * SIDE EFFECTS: |
| 743 | * |
| 744 | * NOTES: Called every esis_config_time seconds |
| 745 | */ |
| 746 | esis_config() |
| 747 | { |
| 748 | register struct ifnet *ifp; |
| 749 | |
| 750 | timeout(esis_config, (caddr_t)0, hz * esis_config_time); |
| 751 | |
| 752 | /* |
| 753 | * Report configuration for each interface that |
| 754 | * - is UP |
| 755 | * - has BROADCAST capability |
| 756 | * - has an ISO address |
| 757 | */ |
| 758 | /* Todo: a better way would be to construct the esh or ish |
| 759 | * once and copy it out for all devices, possibly calling |
| 760 | * a method in the iso_ifaddr structure to encapsulate and |
| 761 | * transmit it. This could work to advantage for non-broadcast media |
| 762 | */ |
| 763 | |
| 764 | for (ifp = ifnet; ifp; ifp = ifp->if_next) { |
| 765 | if ((ifp->if_flags & IFF_UP) && |
| 766 | (ifp->if_flags & IFF_BROADCAST)) { |
| 767 | /* search for an ISO address family */ |
| 768 | struct ifaddr *ia; |
| 769 | |
| 770 | for (ia = ifp->if_addrlist; ia; ia = ia->ifa_next) { |
| 771 | if (ia->ifa_addr->sa_family == AF_ISO) { |
| 772 | esis_shoutput(ifp, |
| 773 | iso_systype & SNPA_ES ? ESIS_ESH : ESIS_ISH, |
| 774 | esis_holding_time, |
| 775 | (caddr_t)(iso_systype & SNPA_ES ? all_is_snpa : |
| 776 | all_es_snpa), 6, (struct iso_addr *)0); |
| 777 | break; |
| 778 | } |
| 779 | } |
| 780 | } |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | /* |
| 785 | * FUNCTION: esis_shoutput |
| 786 | * |
| 787 | * PURPOSE: Transmit an esh or ish pdu |
| 788 | * |
| 789 | * RETURNS: nothing |
| 790 | * |
| 791 | * SIDE EFFECTS: |
| 792 | * |
| 793 | * NOTES: |
| 794 | */ |
| 795 | esis_shoutput(ifp, type, ht, sn_addr, sn_len, isoa) |
| 796 | struct ifnet *ifp; |
| 797 | int type; |
| 798 | short ht; |
| 799 | caddr_t sn_addr; |
| 800 | int sn_len; |
| 801 | struct iso_addr *isoa; |
| 802 | { |
| 803 | struct mbuf *m, *m0; |
| 804 | caddr_t cp, naddrp; |
| 805 | int naddr = 0; |
| 806 | struct esis_fixed *pdu; |
| 807 | struct iso_ifaddr *ia; |
| 808 | int len; |
| 809 | struct sockaddr_iso siso; |
| 810 | |
| 811 | if (type == ESIS_ESH) |
| 812 | esis_stat.es_eshsent++; |
| 813 | else if (type == ESIS_ISH) |
| 814 | esis_stat.es_ishsent++; |
| 815 | else { |
| 816 | printf("esis_shoutput: bad pdu type\n"); |
| 817 | return; |
| 818 | } |
| 819 | |
| 820 | IFDEBUG(D_ESISOUTPUT) |
| 821 | int i; |
| 822 | printf("esis_shoutput: ifp x%x (%s%d), %s, ht %d, to: [%d] ", |
| 823 | ifp, ifp->if_name, ifp->if_unit, type == ESIS_ESH ? "esh" : "ish", |
| 824 | ht, sn_len); |
| 825 | for (i=0; i<sn_len; i++) |
| 826 | printf("%x%c", *(sn_addr+i), i < (sn_len-1) ? ':' : ' '); |
| 827 | printf("\n"); |
| 828 | ENDDEBUG |
| 829 | |
| 830 | if ((m0 = m = m_gethdr(M_DONTWAIT, MT_HEADER)) == NULL) { |
| 831 | esis_stat.es_nomem++; |
| 832 | return; |
| 833 | } |
| 834 | bzero(mtod(m, caddr_t), MHLEN); |
| 835 | |
| 836 | pdu = mtod(m, struct esis_fixed *); |
| 837 | naddrp = cp = (caddr_t)(pdu + 1); |
| 838 | len = sizeof(struct esis_fixed); |
| 839 | |
| 840 | /* |
| 841 | * Build fixed part of header |
| 842 | */ |
| 843 | pdu->esis_proto_id = ISO9542_ESIS; |
| 844 | pdu->esis_vers = ESIS_VERSION; |
| 845 | pdu->esis_type = type; |
| 846 | HTOC(pdu->esis_ht_msb, pdu->esis_ht_lsb, ht); |
| 847 | |
| 848 | if (type == ESIS_ESH) { |
| 849 | cp++; |
| 850 | len++; |
| 851 | } |
| 852 | |
| 853 | m->m_len = len; |
| 854 | if (isoa) { |
| 855 | /* |
| 856 | * Here we are responding to a clnp packet sent to an NSAP |
| 857 | * that is ours which was sent to the MAC addr all_es's. |
| 858 | * It is possible that we did not specifically advertise this |
| 859 | * NSAP, even though it is ours, so we will respond |
| 860 | * directly to the sender that we are here. If we do have |
| 861 | * multiple NSEL's we'll tack them on so he can compress them out. |
| 862 | */ |
| 863 | (void) esis_insert_addr(&cp, &len, isoa, m, 0); |
| 864 | naddr = 1; |
| 865 | } |
| 866 | for (ia = iso_ifaddr; ia; ia = ia->ia_next) { |
| 867 | int nsellen = (type == ESIS_ISH ? ia->ia_addr.siso_tlen : 0); |
| 868 | int n = ia->ia_addr.siso_nlen; |
| 869 | register struct iso_ifaddr *ia2; |
| 870 | |
| 871 | if (type == ESIS_ISH && naddr > 0) |
| 872 | break; |
| 873 | for (ia2 = iso_ifaddr; ia2 != ia; ia2 = ia2->ia_next) |
| 874 | if (Bcmp(ia->ia_addr.siso_data, ia2->ia_addr.siso_data, n) == 0) |
| 875 | break; |
| 876 | if (ia2 != ia) |
| 877 | continue; /* Means we have previously copied this nsap */ |
| 878 | if (isoa && Bcmp(ia->ia_addr.siso_data, isoa->isoa_genaddr, n) == 0) { |
| 879 | isoa = 0; |
| 880 | continue; /* Ditto */ |
| 881 | } |
| 882 | IFDEBUG(D_ESISOUTPUT) |
| 883 | printf("esis_shoutput: adding NSAP %s\n", |
| 884 | clnp_iso_addrp(&ia->ia_addr.siso_addr)); |
| 885 | ENDDEBUG |
| 886 | if (!esis_insert_addr(&cp, &len, |
| 887 | &ia->ia_addr.siso_addr, m, nsellen)) { |
| 888 | EXTEND_PACKET(m, m0, cp); |
| 889 | (void) esis_insert_addr(&cp, &len, &ia->ia_addr.siso_addr, m, |
| 890 | nsellen); |
| 891 | } |
| 892 | naddr++; |
| 893 | } |
| 894 | |
| 895 | if (type == ESIS_ESH) |
| 896 | *naddrp = naddr; |
| 897 | else { |
| 898 | /* add suggested es config timer option to ISH */ |
| 899 | if (M_TRAILINGSPACE(m) < 4) { |
| 900 | printf("esis_shoutput: extending packet\n"); |
| 901 | EXTEND_PACKET(m, m0, cp); |
| 902 | } |
| 903 | *cp++ = ESISOVAL_ESCT; |
| 904 | *cp++ = 2; |
| 905 | HTOC(*cp, *(cp+1), esis_esconfig_time); |
| 906 | len += 4; |
| 907 | m->m_len += 4; |
| 908 | IFDEBUG(D_ESISOUTPUT) |
| 909 | printf("m0 0x%x, m 0x%x, data 0x%x, len %d, cp 0x%x\n", |
| 910 | m0, m, m->m_data, m->m_len, cp); |
| 911 | ENDDEBUG |
| 912 | } |
| 913 | |
| 914 | m0->m_pkthdr.len = len; |
| 915 | pdu->esis_hdr_len = len; |
| 916 | iso_gen_csum(m0, ESIS_CKSUM_OFF, (int)pdu->esis_hdr_len); |
| 917 | |
| 918 | bzero((caddr_t)&siso, sizeof(siso)); |
| 919 | siso.siso_family = AF_ISO; |
| 920 | siso.siso_data[0] = AFI_SNA; |
| 921 | siso.siso_nlen = sn_len + 1; |
| 922 | bcopy(sn_addr, siso.siso_data + 1, (unsigned)sn_len); |
| 923 | (ifp->if_output)(ifp, m0, &siso, 0); |
| 924 | } |
| 925 | |
| 926 | /* |
| 927 | * FUNCTION: isis_input |
| 928 | * |
| 929 | * PURPOSE: Process an incoming isis packet |
| 930 | * |
| 931 | * RETURNS: nothing |
| 932 | * |
| 933 | * SIDE EFFECTS: |
| 934 | * |
| 935 | * NOTES: |
| 936 | */ |
| 937 | isis_input(m0, shp) |
| 938 | struct mbuf *m0; /* ptr to first mbuf of pkt */ |
| 939 | struct snpa_hdr *shp; /* subnetwork header */ |
| 940 | { |
| 941 | register int type; |
| 942 | register struct rawcb *rp, *first_rp = 0; |
| 943 | struct ifnet *ifp = shp->snh_ifp; |
| 944 | char workbuf[16]; |
| 945 | struct mbuf *mm; |
| 946 | |
| 947 | IFDEBUG(D_ISISINPUT) |
| 948 | int i; |
| 949 | |
| 950 | printf("isis_input: pkt on ifp x%x (%s%d): from:", ifp, |
| 951 | ifp->if_name, ifp->if_unit); |
| 952 | for (i=0; i<6; i++) |
| 953 | printf("%x%c", shp->snh_shost[i]&0xff, (i<5) ? ':' : ' '); |
| 954 | printf(" to:"); |
| 955 | for (i=0; i<6; i++) |
| 956 | printf("%x%c", shp->snh_dhost[i]&0xff, (i<5) ? ':' : ' '); |
| 957 | printf("\n"); |
| 958 | ENDDEBUG |
| 959 | esis_dl.sdl_alen = ifp->if_addrlen; |
| 960 | esis_dl.sdl_index = ifp->if_index; |
| 961 | bcopy(shp->snh_shost, (caddr_t)esis_dl.sdl_data, esis_dl.sdl_alen); |
| 962 | for (rp = esis_pcb.rcb_next; rp != &esis_pcb; rp = rp->rcb_next) { |
| 963 | if (first_rp == 0) { |
| 964 | first_rp = rp; |
| 965 | continue; |
| 966 | } |
| 967 | if (mm = m_copy(m0, 0, M_COPYALL)) { /*can't block at interrupt level */ |
| 968 | if (sbappendaddr(&rp->rcb_socket->so_rcv, |
| 969 | &esis_dl, mm, (struct mbuf *)0) != 0) |
| 970 | sorwakeup(rp->rcb_socket); |
| 971 | else { |
| 972 | IFDEBUG(D_ISISINPUT) |
| 973 | printf("Error in sbappenaddr, mm = 0x%x\n", mm); |
| 974 | ENDDEBUG |
| 975 | m_freem(mm); |
| 976 | } |
| 977 | } |
| 978 | } |
| 979 | if (first_rp && sbappendaddr(&first_rp->rcb_socket->so_rcv, |
| 980 | &esis_dl, m0, (struct mbuf *)0) != 0) { |
| 981 | sorwakeup(first_rp->rcb_socket); |
| 982 | return; |
| 983 | } |
| 984 | m_freem(m0); |
| 985 | } |
| 986 | |
| 987 | isis_output(sdl, m) |
| 988 | register struct sockaddr_dl *sdl; |
| 989 | struct mbuf *m; |
| 990 | { |
| 991 | register struct ifnet *ifp; |
| 992 | struct ifaddr *ifa, *ifa_ifwithnet(); |
| 993 | struct sockaddr_iso siso; |
| 994 | int error = 0; |
| 995 | unsigned sn_len; |
| 996 | |
| 997 | ifa = ifa_ifwithnet(sdl); /* extract ifp from sockaddr_dl */ |
| 998 | if (ifa == 0) { |
| 999 | IFDEBUG(D_ISISOUTPUT) |
| 1000 | printf("isis_output: interface not found\n"); |
| 1001 | ENDDEBUG |
| 1002 | error = EINVAL; |
| 1003 | goto release; |
| 1004 | } |
| 1005 | ifp = ifa->ifa_ifp; |
| 1006 | sn_len = sdl->sdl_alen; |
| 1007 | IFDEBUG(D_ISISOUTPUT) |
| 1008 | u_char *cp = (u_char *)LLADDR(sdl), *cplim = cp + sn_len; |
| 1009 | printf("isis_output: ifp 0x%x (%s%d), to: ", |
| 1010 | ifp, ifp->if_name, ifp->if_unit); |
| 1011 | while (cp < cplim) { |
| 1012 | printf("%x", *cp++); |
| 1013 | printf("%c", (cp < cplim) ? ':' : ' '); |
| 1014 | } |
| 1015 | printf("\n"); |
| 1016 | ENDDEBUG |
| 1017 | bzero((caddr_t)&siso, sizeof(siso)); |
| 1018 | siso.siso_family = AF_ISO; /* This convention may be useful for X.25 */ |
| 1019 | siso.siso_data[0] = AFI_SNA; |
| 1020 | siso.siso_nlen = sn_len + 1; |
| 1021 | bcopy(LLADDR(sdl), siso.siso_data + 1, sn_len); |
| 1022 | error = (ifp->if_output)(ifp, m, (struct sockaddr *)&siso, 0); |
| 1023 | if (error) { |
| 1024 | IFDEBUG(D_ISISOUTPUT) |
| 1025 | printf("isis_output: error from ether_output is %d\n", error); |
| 1026 | ENDDEBUG |
| 1027 | } |
| 1028 | return (error); |
| 1029 | |
| 1030 | release: |
| 1031 | if (m != NULL) |
| 1032 | m_freem(m); |
| 1033 | return(error); |
| 1034 | } |
| 1035 | |
| 1036 | |
| 1037 | /* |
| 1038 | * FUNCTION: esis_ctlinput |
| 1039 | * |
| 1040 | * PURPOSE: Handle the PRC_IFDOWN transition |
| 1041 | * |
| 1042 | * RETURNS: nothing |
| 1043 | * |
| 1044 | * SIDE EFFECTS: |
| 1045 | * |
| 1046 | * NOTES: Calls snpac_flush for interface specified. |
| 1047 | * The loop through iso_ifaddr is stupid because |
| 1048 | * back in if_down, we knew the ifp... |
| 1049 | */ |
| 1050 | esis_ctlinput(req, siso) |
| 1051 | int req; /* request: we handle only PRC_IFDOWN */ |
| 1052 | struct sockaddr_iso *siso; /* address of ifp */ |
| 1053 | { |
| 1054 | register struct iso_ifaddr *ia; /* scan through interface addresses */ |
| 1055 | |
| 1056 | if (req == PRC_IFDOWN) |
| 1057 | for (ia = iso_ifaddr; ia; ia = ia->ia_next) { |
| 1058 | if (iso_addrmatch(IA_SIS(ia), siso)) |
| 1059 | snpac_flushifp(ia->ia_ifp); |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | #endif ISO |