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1.1 ! root 1: /* ! 2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. ! 3: * ! 4: * @APPLE_LICENSE_HEADER_START@ ! 5: * ! 6: * The contents of this file constitute Original Code as defined in and ! 7: * are subject to the Apple Public Source License Version 1.1 (the ! 8: * "License"). You may not use this file except in compliance with the ! 9: * License. Please obtain a copy of the License at ! 10: * http://www.apple.com/publicsource and read it before using this file. ! 11: * ! 12: * This Original Code and all software distributed under the License are ! 13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER ! 14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, ! 15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, ! 16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the ! 17: * License for the specific language governing rights and limitations ! 18: * under the License. ! 19: * ! 20: * @APPLE_LICENSE_HEADER_END@ ! 21: */ ! 22: /*- ! 23: * Copyright (c) 1991, 1993 ! 24: * The Regents of the University of California. All rights reserved. ! 25: * ! 26: * Redistribution and use in source and binary forms, with or without ! 27: * modification, are permitted provided that the following conditions ! 28: * are met: ! 29: * 1. Redistributions of source code must retain the above copyright ! 30: * notice, this list of conditions and the following disclaimer. ! 31: * 2. Redistributions in binary form must reproduce the above copyright ! 32: * notice, this list of conditions and the following disclaimer in the ! 33: * documentation and/or other materials provided with the distribution. ! 34: * 3. All advertising materials mentioning features or use of this software ! 35: * must display the following acknowledgement: ! 36: * This product includes software developed by the University of ! 37: * California, Berkeley and its contributors. ! 38: * 4. Neither the name of the University nor the names of its contributors ! 39: * may be used to endorse or promote products derived from this software ! 40: * without specific prior written permission. ! 41: * ! 42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ! 43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ! 44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ! 45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE ! 46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL ! 47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS ! 48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ! 49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT ! 50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY ! 51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ! 52: * SUCH DAMAGE. ! 53: * ! 54: * @(#)clnp_output.c 8.1 (Berkeley) 6/10/93 ! 55: */ ! 56: ! 57: /*********************************************************** ! 58: Copyright IBM Corporation 1987 ! 59: ! 60: All Rights Reserved ! 61: ! 62: Permission to use, copy, modify, and distribute this software and its ! 63: documentation for any purpose and without fee is hereby granted, ! 64: provided that the above copyright notice appear in all copies and that ! 65: both that copyright notice and this permission notice appear in ! 66: supporting documentation, and that the name of IBM not be ! 67: used in advertising or publicity pertaining to distribution of the ! 68: software without specific, written prior permission. ! 69: ! 70: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ! 71: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL ! 72: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ! 73: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, ! 74: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ! 75: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS ! 76: SOFTWARE. ! 77: ! 78: ******************************************************************/ ! 79: ! 80: /* ! 81: * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison ! 82: */ ! 83: ! 84: #include <sys/param.h> ! 85: #include <sys/mbuf.h> ! 86: #include <sys/domain.h> ! 87: #include <sys/protosw.h> ! 88: #include <sys/socket.h> ! 89: #include <sys/socketvar.h> ! 90: #include <sys/errno.h> ! 91: #include <sys/time.h> ! 92: ! 93: #include <net/if.h> ! 94: #include <net/route.h> ! 95: ! 96: #include <netiso/iso.h> ! 97: #include <netiso/iso_var.h> ! 98: #include <netiso/iso_pcb.h> ! 99: #include <netiso/clnp.h> ! 100: #include <netiso/clnp_stat.h> ! 101: #include <netiso/argo_debug.h> ! 102: ! 103: static struct clnp_fixed dt_template = { ! 104: ISO8473_CLNP, /* network identifier */ ! 105: 0, /* length */ ! 106: ISO8473_V1, /* version */ ! 107: CLNP_TTL, /* ttl */ ! 108: CLNP_DT|CNF_SEG_OK|CNF_ERR_OK, /* type */ ! 109: 0, /* segment length */ ! 110: 0 /* checksum */ ! 111: }; ! 112: ! 113: static struct clnp_fixed raw_template = { ! 114: ISO8473_CLNP, /* network identifier */ ! 115: 0, /* length */ ! 116: ISO8473_V1, /* version */ ! 117: CLNP_TTL, /* ttl */ ! 118: CLNP_RAW|CNF_SEG_OK|CNF_ERR_OK, /* type */ ! 119: 0, /* segment length */ ! 120: 0 /* checksum */ ! 121: }; ! 122: ! 123: static struct clnp_fixed echo_template = { ! 124: ISO8473_CLNP, /* network identifier */ ! 125: 0, /* length */ ! 126: ISO8473_V1, /* version */ ! 127: CLNP_TTL, /* ttl */ ! 128: CLNP_EC|CNF_SEG_OK|CNF_ERR_OK, /* type */ ! 129: 0, /* segment length */ ! 130: 0 /* checksum */ ! 131: }; ! 132: ! 133: static struct clnp_fixed echor_template = { ! 134: ISO8473_CLNP, /* network identifier */ ! 135: 0, /* length */ ! 136: ISO8473_V1, /* version */ ! 137: CLNP_TTL, /* ttl */ ! 138: CLNP_ECR|CNF_SEG_OK|CNF_ERR_OK, /* type */ ! 139: 0, /* segment length */ ! 140: 0 /* checksum */ ! 141: }; ! 142: ! 143: #ifdef DECBIT ! 144: u_char qos_option[] = {CLNPOVAL_QOS, 1, ! 145: CLNPOVAL_GLOBAL|CLNPOVAL_SEQUENCING|CLNPOVAL_LOWDELAY}; ! 146: #endif /* DECBIT */ ! 147: ! 148: int clnp_id = 0; /* id for segmented dgrams */ ! 149: ! 150: /* ! 151: * FUNCTION: clnp_output ! 152: * ! 153: * PURPOSE: output the data in the mbuf as a clnp datagram ! 154: * ! 155: * The data specified by m0 is sent as a clnp datagram. ! 156: * The mbuf chain m0 will be freed when this routine has ! 157: * returned. ! 158: * ! 159: * If options is non-null, it points to an mbuf which contains ! 160: * options to be sent with the datagram. The options must ! 161: * be formatted in the mbuf according to clnp rules. Options ! 162: * will not be freed. ! 163: * ! 164: * Datalen specifies the length of the data in m0. ! 165: * ! 166: * Src and dst are the addresses for the packet. ! 167: * ! 168: * If route is non-null, it is used as the route for ! 169: * the packet. ! 170: * ! 171: * By default, a DT is sent. However, if flags & CNLP_SEND_ER ! 172: * then an ER will be sent. If flags & CLNP_SEND_RAW, then ! 173: * the packet will be send as raw clnp. ! 174: * ! 175: * RETURNS: 0 success ! 176: * appropriate error code ! 177: * ! 178: * SIDE EFFECTS: none ! 179: * ! 180: * NOTES: ! 181: * Flags are interpretated as follows: ! 182: * CLNP_NO_SEG - do not allow this pkt to be segmented. ! 183: * CLNP_NO_ER - have pkt request ER suppression. ! 184: * CLNP_SEND_RAW - send pkt as RAW DT rather than TP DT ! 185: * CLNP_NO_CKSUM - don't compute clnp checksum ! 186: * CLNP_ECHO - send as ECHO packet ! 187: * ! 188: * When checking for a cached packet, clnp checks ! 189: * that the route taken is still up. It does not ! 190: * check that the route is still to the same destination. ! 191: * This means that any entity that alters an existing ! 192: * route for an isopcb (such as when a redirect arrives) ! 193: * must invalidate the clnp cache. It might be perferable ! 194: * to have clnp check that the route has the same dest, but ! 195: * by avoiding this check, we save a call to iso_addrmatch1. ! 196: */ ! 197: clnp_output(m0, isop, datalen, flags) ! 198: struct mbuf *m0; /* data for the packet */ ! 199: struct isopcb *isop; /* iso pcb */ ! 200: int datalen; /* number of bytes of data in m0 */ ! 201: int flags; /* flags */ ! 202: { ! 203: int error = 0; /* return value of function */ ! 204: register struct mbuf *m = m0; /* mbuf for clnp header chain */ ! 205: register struct clnp_fixed *clnp; /* ptr to fixed part of hdr */ ! 206: register caddr_t hoff; /* offset into header */ ! 207: int total_len; /* total length of packet */ ! 208: struct iso_addr *src; /* ptr to source address */ ! 209: struct iso_addr *dst; /* ptr to destination address */ ! 210: struct clnp_cache clc; /* storage for cache information */ ! 211: struct clnp_cache *clcp = NULL; /* ptr to clc */ ! 212: int hdrlen = 0; ! 213: ! 214: dst = &isop->isop_faddr->siso_addr; ! 215: if (isop->isop_laddr == 0) { ! 216: struct iso_ifaddr *ia = 0; ! 217: clnp_route(dst, &isop->isop_route, flags, 0, &ia); ! 218: if (ia == 0 || ia->ia_ifa.ifa_addr->sa_family != AF_ISO) ! 219: return (ENETUNREACH); ! 220: src = &ia->ia_addr.siso_addr; ! 221: } else ! 222: src = &isop->isop_laddr->siso_addr; ! 223: ! 224: IFDEBUG(D_OUTPUT) ! 225: printf("clnp_output: to %s", clnp_iso_addrp(dst)); ! 226: printf(" from %s of %d bytes\n", clnp_iso_addrp(src), datalen); ! 227: printf("\toptions x%x, flags x%x, isop_clnpcache x%x\n", ! 228: isop->isop_options, flags, isop->isop_clnpcache); ! 229: ENDDEBUG ! 230: ! 231: if (isop->isop_clnpcache != NULL) { ! 232: clcp = mtod(isop->isop_clnpcache, struct clnp_cache *); ! 233: } ! 234: ! 235: /* ! 236: * Check if cache is valid ... ! 237: */ ! 238: IFDEBUG(D_OUTPUT) ! 239: printf("clnp_output: ck cache: clcp %x\n", clcp); ! 240: if (clcp != NULL) { ! 241: printf("\tclc_dst %s\n", clnp_iso_addrp(&clcp->clc_dst)); ! 242: printf("\tisop_opts x%x, clc_opts x%x\n", isop->isop_options, ! 243: clcp->clc_options); ! 244: if (isop->isop_route.ro_rt) ! 245: printf("\tro_rt x%x, rt_flags x%x\n", ! 246: isop->isop_route.ro_rt, isop->isop_route.ro_rt->rt_flags); ! 247: printf("\tflags x%x, clc_flags x%x\n", flags, clcp->clc_flags); ! 248: printf("\tclc_hdr x%x\n", clcp->clc_hdr); ! 249: } ! 250: ENDDEBUG ! 251: if ((clcp != NULL) && /* cache exists */ ! 252: (isop->isop_options == clcp->clc_options) && /* same options */ ! 253: (iso_addrmatch1(dst, &clcp->clc_dst)) && /* dst still same */ ! 254: (isop->isop_route.ro_rt != NULL) && /* route exists */ ! 255: (isop->isop_route.ro_rt == clcp->clc_rt) && /* and is cached */ ! 256: (isop->isop_route.ro_rt->rt_flags & RTF_UP) && /* route still up */ ! 257: (flags == clcp->clc_flags) && /* same flags */ ! 258: (clcp->clc_hdr != NULL)) { /* hdr mbuf exists */ ! 259: /* ! 260: * The cache is valid ! 261: */ ! 262: ! 263: IFDEBUG(D_OUTPUT) ! 264: printf("clnp_output: using cache\n"); ! 265: ENDDEBUG ! 266: ! 267: m = m_copy(clcp->clc_hdr, 0, (int)M_COPYALL); ! 268: if (m == NULL) { ! 269: /* ! 270: * No buffers left to copy cached packet header. Use ! 271: * the cached packet header this time, and ! 272: * mark the hdr as vacant ! 273: */ ! 274: m = clcp->clc_hdr; ! 275: clcp->clc_hdr = NULL; ! 276: } ! 277: m->m_next = m0; /* ASSUMES pkt hdr is 1 mbuf long */ ! 278: clnp = mtod(m, struct clnp_fixed *); ! 279: } else { ! 280: struct clnp_optidx *oidx = NULL; /* index to clnp options */ ! 281: ! 282: /* ! 283: * The cache is not valid. Allocate an mbuf (if necessary) ! 284: * to hold cached info. If one is not available, then ! 285: * don't bother with the cache ! 286: */ ! 287: INCSTAT(cns_cachemiss); ! 288: if (flags & CLNP_NOCACHE) { ! 289: clcp = &clc; ! 290: } else { ! 291: if (isop->isop_clnpcache == NULL) { ! 292: /* ! 293: * There is no clnpcache. Allocate an mbuf to hold one ! 294: */ ! 295: if ((isop->isop_clnpcache = m_get(M_DONTWAIT, MT_HEADER)) ! 296: == NULL) { ! 297: /* ! 298: * No mbufs available. Pretend that we don't want ! 299: * caching this time. ! 300: */ ! 301: IFDEBUG(D_OUTPUT) ! 302: printf("clnp_output: no mbufs to allocate to cache\n"); ! 303: ENDDEBUG ! 304: flags |= CLNP_NOCACHE; ! 305: clcp = &clc; ! 306: } else { ! 307: clcp = mtod(isop->isop_clnpcache, struct clnp_cache *); ! 308: } ! 309: } else { ! 310: /* ! 311: * A clnpcache mbuf exists. If the clc_hdr is not null, ! 312: * we must free it, as a new one is about to be created. ! 313: */ ! 314: clcp = mtod(isop->isop_clnpcache, struct clnp_cache *); ! 315: if (clcp->clc_hdr != NULL) { ! 316: /* ! 317: * The clc_hdr is not null but a clnpcache mbuf exists. ! 318: * This means that there was a cache, but the existing ! 319: * copy of the hdr is no longer valid. Free it now ! 320: * before we lose the pointer to it. ! 321: */ ! 322: IFDEBUG(D_OUTPUT) ! 323: printf("clnp_output: freeing old clc_hdr 0x%x\n", ! 324: clcp->clc_hdr); ! 325: ENDDEBUG ! 326: m_free(clcp->clc_hdr); ! 327: IFDEBUG(D_OUTPUT) ! 328: printf("clnp_output: freed old clc_hdr (done)\n"); ! 329: ENDDEBUG ! 330: } ! 331: } ! 332: } ! 333: IFDEBUG(D_OUTPUT) ! 334: printf("clnp_output: NEW clcp x%x\n",clcp); ! 335: ENDDEBUG ! 336: bzero((caddr_t)clcp, sizeof(struct clnp_cache)); ! 337: ! 338: if (isop->isop_optindex) ! 339: oidx = mtod(isop->isop_optindex, struct clnp_optidx *); ! 340: ! 341: /* ! 342: * Don't allow packets with security, quality of service, ! 343: * priority, or error report options to be sent. ! 344: */ ! 345: if ((isop->isop_options) && (oidx)) { ! 346: if ((oidx->cni_securep) || ! 347: (oidx->cni_priorp) || ! 348: (oidx->cni_qos_formatp) || ! 349: (oidx->cni_er_reason != ER_INVALREAS)) { ! 350: IFDEBUG(D_OUTPUT) ! 351: printf("clnp_output: pkt dropped - option unsupported\n"); ! 352: ENDDEBUG ! 353: m_freem(m0); ! 354: return(EINVAL); ! 355: } ! 356: } ! 357: ! 358: /* ! 359: * Don't allow any invalid flags to be set ! 360: */ ! 361: if ((flags & (CLNP_VFLAGS)) != flags) { ! 362: IFDEBUG(D_OUTPUT) ! 363: printf("clnp_output: packet dropped - flags unsupported\n"); ! 364: ENDDEBUG ! 365: INCSTAT(cns_odropped); ! 366: m_freem(m0); ! 367: return(EINVAL); ! 368: } ! 369: ! 370: /* ! 371: * Don't allow funny lengths on dst; src may be zero in which ! 372: * case we insert the source address based upon the interface ! 373: */ ! 374: if ((src->isoa_len > sizeof(struct iso_addr)) || ! 375: (dst->isoa_len == 0) || ! 376: (dst->isoa_len > sizeof(struct iso_addr))) { ! 377: m_freem(m0); ! 378: INCSTAT(cns_odropped); ! 379: return(ENAMETOOLONG); ! 380: } ! 381: ! 382: /* ! 383: * Grab mbuf to contain header ! 384: */ ! 385: MGETHDR(m, M_DONTWAIT, MT_HEADER); ! 386: if (m == 0) { ! 387: m_freem(m0); ! 388: INCSTAT(cns_odropped); ! 389: return(ENOBUFS); ! 390: } ! 391: INCSTAT(cns_sent); ! 392: m->m_next = m0; ! 393: clnp = mtod(m, struct clnp_fixed *); ! 394: clcp->clc_segoff = 0; ! 395: ! 396: /* ! 397: * Fill in all of fixed hdr except lengths and checksum ! 398: */ ! 399: if (flags & CLNP_SEND_RAW) { ! 400: *clnp = raw_template; ! 401: } else if (flags & CLNP_ECHO) { ! 402: *clnp = echo_template; ! 403: } else if (flags & CLNP_ECHOR) { ! 404: *clnp = echor_template; ! 405: } else { ! 406: *clnp = dt_template; ! 407: } ! 408: if (flags & CLNP_NO_SEG) ! 409: clnp->cnf_type &= ~CNF_SEG_OK; ! 410: if (flags & CLNP_NO_ER) ! 411: clnp->cnf_type &= ~CNF_ERR_OK; ! 412: ! 413: /* ! 414: * Route packet; special case for source rt ! 415: */ ! 416: if ((isop->isop_options) && CLNPSRCRT_VALID(oidx)) { ! 417: IFDEBUG(D_OUTPUT) ! 418: printf("clnp_output: calling clnp_srcroute\n"); ! 419: ENDDEBUG ! 420: error = clnp_srcroute(isop->isop_options, oidx, &isop->isop_route, ! 421: &clcp->clc_firsthop, &clcp->clc_ifa, dst); ! 422: } else { ! 423: IFDEBUG(D_OUTPUT) ! 424: ENDDEBUG ! 425: error = clnp_route(dst, &isop->isop_route, flags, ! 426: &clcp->clc_firsthop, &clcp->clc_ifa); ! 427: } ! 428: if (error || (clcp->clc_ifa == 0)) { ! 429: IFDEBUG(D_OUTPUT) ! 430: printf("clnp_output: route failed, errno %d\n", error); ! 431: printf("@clcp:\n"); ! 432: dump_buf(clcp, sizeof (struct clnp_cache)); ! 433: ENDDEBUG ! 434: goto bad; ! 435: } ! 436: clcp->clc_rt = isop->isop_route.ro_rt; /* XXX */ ! 437: clcp->clc_ifp = clcp->clc_ifa->ia_ifp; /* XXX */ ! 438: ! 439: IFDEBUG(D_OUTPUT) ! 440: printf("clnp_output: packet routed to %s\n", ! 441: clnp_iso_addrp( ! 442: &((struct sockaddr_iso *)clcp->clc_firsthop)->siso_addr)); ! 443: ENDDEBUG ! 444: ! 445: /* ! 446: * If src address is not yet specified, use address of ! 447: * interface. NOTE: this will now update the laddr field in ! 448: * the isopcb. Is this desirable? RAH? ! 449: */ ! 450: if (src->isoa_len == 0) { ! 451: src = &(clcp->clc_ifa->ia_addr.siso_addr); ! 452: IFDEBUG(D_OUTPUT) ! 453: printf("clnp_output: new src %s\n", clnp_iso_addrp(src)); ! 454: ENDDEBUG ! 455: } ! 456: ! 457: /* ! 458: * Insert the source and destination address, ! 459: */ ! 460: hoff = (caddr_t)clnp + sizeof(struct clnp_fixed); ! 461: CLNP_INSERT_ADDR(hoff, *dst); ! 462: CLNP_INSERT_ADDR(hoff, *src); ! 463: ! 464: /* ! 465: * Leave room for the segment part, if segmenting is selected ! 466: */ ! 467: if (clnp->cnf_type & CNF_SEG_OK) { ! 468: clcp->clc_segoff = hoff - (caddr_t)clnp; ! 469: hoff += sizeof(struct clnp_segment); ! 470: } ! 471: ! 472: clnp->cnf_hdr_len = m->m_len = (u_char)(hoff - (caddr_t)clnp); ! 473: hdrlen = clnp->cnf_hdr_len; ! 474: ! 475: #ifdef DECBIT ! 476: /* ! 477: * Add the globally unique QOS (with room for congestion experienced ! 478: * bit). I can safely assume that this option is not in the options ! 479: * mbuf below because I checked that the option was not specified ! 480: * previously ! 481: */ ! 482: if ((m->m_len + sizeof(qos_option)) < MLEN) { ! 483: bcopy((caddr_t)qos_option, hoff, sizeof(qos_option)); ! 484: clnp->cnf_hdr_len += sizeof(qos_option); ! 485: hdrlen += sizeof(qos_option); ! 486: m->m_len += sizeof(qos_option); ! 487: } ! 488: #endif /* DECBIT */ ! 489: ! 490: /* ! 491: * If an options mbuf is present, concatenate a copy to the hdr mbuf. ! 492: */ ! 493: if (isop->isop_options) { ! 494: struct mbuf *opt_copy = m_copy(isop->isop_options, 0, (int)M_COPYALL); ! 495: if (opt_copy == NULL) { ! 496: error = ENOBUFS; ! 497: goto bad; ! 498: } ! 499: /* Link in place */ ! 500: opt_copy->m_next = m->m_next; ! 501: m->m_next = opt_copy; ! 502: ! 503: /* update size of header */ ! 504: clnp->cnf_hdr_len += opt_copy->m_len; ! 505: hdrlen += opt_copy->m_len; ! 506: } ! 507: ! 508: if (hdrlen > CLNP_HDR_MAX) { ! 509: error = EMSGSIZE; ! 510: goto bad; ! 511: } ! 512: ! 513: /* ! 514: * Now set up the cache entry in the pcb ! 515: */ ! 516: if ((flags & CLNP_NOCACHE) == 0) { ! 517: if (clcp->clc_hdr = m_copy(m, 0, (int)clnp->cnf_hdr_len)) { ! 518: clcp->clc_dst = *dst; ! 519: clcp->clc_flags = flags; ! 520: clcp->clc_options = isop->isop_options; ! 521: } ! 522: } ! 523: } ! 524: /* ! 525: * If small enough for interface, send directly ! 526: * Fill in segmentation part of hdr if using the full protocol ! 527: */ ! 528: total_len = clnp->cnf_hdr_len + datalen; ! 529: if (clnp->cnf_type & CNF_SEG_OK) { ! 530: struct clnp_segment seg_part; /* segment part of hdr */ ! 531: seg_part.cng_id = htons(clnp_id++); ! 532: seg_part.cng_off = htons(0); ! 533: seg_part.cng_tot_len = htons(total_len); ! 534: (void) bcopy((caddr_t)&seg_part, (caddr_t) clnp + clcp->clc_segoff, ! 535: sizeof(seg_part)); ! 536: } ! 537: if (total_len <= SN_MTU(clcp->clc_ifp, clcp->clc_rt)) { ! 538: HTOC(clnp->cnf_seglen_msb, clnp->cnf_seglen_lsb, total_len); ! 539: m->m_pkthdr.len = total_len; ! 540: /* ! 541: * Compute clnp checksum (on header only) ! 542: */ ! 543: if (flags & CLNP_NO_CKSUM) { ! 544: HTOC(clnp->cnf_cksum_msb, clnp->cnf_cksum_lsb, 0); ! 545: } else { ! 546: iso_gen_csum(m, CLNP_CKSUM_OFF, (int)clnp->cnf_hdr_len); ! 547: } ! 548: ! 549: IFDEBUG(D_DUMPOUT) ! 550: struct mbuf *mdump = m; ! 551: printf("clnp_output: sending dg:\n"); ! 552: while (mdump != NULL) { ! 553: dump_buf(mtod(mdump, caddr_t), mdump->m_len); ! 554: mdump = mdump->m_next; ! 555: } ! 556: ENDDEBUG ! 557: ! 558: error = SN_OUTPUT(clcp, m); ! 559: goto done; ! 560: } else { ! 561: /* ! 562: * Too large for interface; fragment if possible. ! 563: */ ! 564: error = clnp_fragment(clcp->clc_ifp, m, clcp->clc_firsthop, ! 565: total_len, clcp->clc_segoff, flags, clcp->clc_rt); ! 566: goto done; ! 567: } ! 568: bad: ! 569: m_freem(m); ! 570: done: ! 571: if (error) { ! 572: clnp_stat.cns_sent--; ! 573: clnp_stat.cns_odropped++; ! 574: } ! 575: return (error); ! 576: } ! 577: ! 578: int clnp_ctloutput() ! 579: { ! 580: }
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