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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 | * | |
78ed81a3 | 33 | * from: @(#)clnp_output.c 7.10 (Berkeley) 5/6/91 |
34 | * $Id$ | |
15637ed4 RG |
35 | */ |
36 | ||
37 | /*********************************************************** | |
38 | Copyright IBM Corporation 1987 | |
39 | ||
40 | All Rights Reserved | |
41 | ||
42 | Permission to use, copy, modify, and distribute this software and its | |
43 | documentation for any purpose and without fee is hereby granted, | |
44 | provided that the above copyright notice appear in all copies and that | |
45 | both that copyright notice and this permission notice appear in | |
46 | supporting documentation, and that the name of IBM not be | |
47 | used in advertising or publicity pertaining to distribution of the | |
48 | software without specific, written prior permission. | |
49 | ||
50 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
51 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
52 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
53 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
54 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
55 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
56 | SOFTWARE. | |
57 | ||
58 | ******************************************************************/ | |
59 | ||
60 | /* | |
61 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
62 | */ | |
15637ed4 RG |
63 | |
64 | #include "param.h" | |
65 | #include "mbuf.h" | |
66 | #include "domain.h" | |
67 | #include "protosw.h" | |
68 | #include "socket.h" | |
69 | #include "socketvar.h" | |
70 | #include "errno.h" | |
71 | #include "time.h" | |
72 | ||
73 | #include "../net/if.h" | |
74 | #include "../net/route.h" | |
75 | ||
76 | #include "iso.h" | |
77 | #include "iso_var.h" | |
78 | #include "iso_pcb.h" | |
79 | #include "clnp.h" | |
80 | #include "clnp_stat.h" | |
81 | #include "argo_debug.h" | |
82 | ||
83 | static struct clnp_fixed dt_template = { | |
84 | ISO8473_CLNP, /* network identifier */ | |
85 | 0, /* length */ | |
86 | ISO8473_V1, /* version */ | |
87 | CLNP_TTL, /* ttl */ | |
88 | CLNP_DT|CNF_SEG_OK|CNF_ERR_OK, /* type */ | |
89 | 0, /* segment length */ | |
90 | 0 /* checksum */ | |
91 | }; | |
92 | ||
93 | static struct clnp_fixed raw_template = { | |
94 | ISO8473_CLNP, /* network identifier */ | |
95 | 0, /* length */ | |
96 | ISO8473_V1, /* version */ | |
97 | CLNP_TTL, /* ttl */ | |
98 | CLNP_RAW|CNF_SEG_OK|CNF_ERR_OK, /* type */ | |
99 | 0, /* segment length */ | |
100 | 0 /* checksum */ | |
101 | }; | |
102 | ||
103 | static struct clnp_fixed echo_template = { | |
104 | ISO8473_CLNP, /* network identifier */ | |
105 | 0, /* length */ | |
106 | ISO8473_V1, /* version */ | |
107 | CLNP_TTL, /* ttl */ | |
108 | CLNP_EC|CNF_SEG_OK|CNF_ERR_OK, /* type */ | |
109 | 0, /* segment length */ | |
110 | 0 /* checksum */ | |
111 | }; | |
112 | ||
113 | #ifdef DECBIT | |
114 | u_char qos_option[] = {CLNPOVAL_QOS, 1, | |
115 | CLNPOVAL_GLOBAL|CLNPOVAL_SEQUENCING|CLNPOVAL_LOWDELAY}; | |
116 | #endif DECBIT | |
117 | ||
118 | int clnp_id = 0; /* id for segmented dgrams */ | |
119 | ||
120 | /* | |
121 | * FUNCTION: clnp_output | |
122 | * | |
123 | * PURPOSE: output the data in the mbuf as a clnp datagram | |
124 | * | |
125 | * The data specified by m0 is sent as a clnp datagram. | |
126 | * The mbuf chain m0 will be freed when this routine has | |
127 | * returned. | |
128 | * | |
129 | * If options is non-null, it points to an mbuf which contains | |
130 | * options to be sent with the datagram. The options must | |
131 | * be formatted in the mbuf according to clnp rules. Options | |
132 | * will not be freed. | |
133 | * | |
134 | * Datalen specifies the length of the data in m0. | |
135 | * | |
136 | * Src and dst are the addresses for the packet. | |
137 | * | |
138 | * If route is non-null, it is used as the route for | |
139 | * the packet. | |
140 | * | |
141 | * By default, a DT is sent. However, if flags & CNLP_SEND_ER | |
142 | * then an ER will be sent. If flags & CLNP_SEND_RAW, then | |
143 | * the packet will be send as raw clnp. | |
144 | * | |
145 | * RETURNS: 0 success | |
146 | * appropriate error code | |
147 | * | |
148 | * SIDE EFFECTS: none | |
149 | * | |
150 | * NOTES: | |
151 | * Flags are interpretated as follows: | |
152 | * CLNP_NO_SEG - do not allow this pkt to be segmented. | |
153 | * CLNP_NO_ER - have pkt request ER suppression. | |
154 | * CLNP_SEND_RAW - send pkt as RAW DT rather than TP DT | |
155 | * CLNP_NO_CKSUM - don't compute clnp checksum | |
156 | * CLNP_ECHO - send as ECHO packet | |
157 | * | |
158 | * When checking for a cached packet, clnp checks | |
159 | * that the route taken is still up. It does not | |
160 | * check that the route is still to the same destination. | |
161 | * This means that any entity that alters an existing | |
162 | * route for an isopcb (such as when a redirect arrives) | |
163 | * must invalidate the clnp cache. It might be perferable | |
164 | * to have clnp check that the route has the same dest, but | |
165 | * by avoiding this check, we save a call to iso_addrmatch1. | |
166 | */ | |
167 | clnp_output(m0, isop, datalen, flags) | |
168 | struct mbuf *m0; /* data for the packet */ | |
169 | struct isopcb *isop; /* iso pcb */ | |
170 | int datalen; /* number of bytes of data in m0 */ | |
171 | int flags; /* flags */ | |
172 | { | |
173 | int error = 0; /* return value of function */ | |
174 | register struct mbuf *m = m0; /* mbuf for clnp header chain */ | |
175 | register struct clnp_fixed *clnp; /* ptr to fixed part of hdr */ | |
176 | register caddr_t hoff; /* offset into header */ | |
177 | int total_len; /* total length of packet */ | |
178 | struct iso_addr *src; /* ptr to source address */ | |
179 | struct iso_addr *dst; /* ptr to destination address */ | |
180 | struct clnp_cache clc; /* storage for cache information */ | |
181 | struct clnp_cache *clcp = NULL; /* ptr to clc */ | |
182 | int hdrlen = 0; | |
183 | ||
184 | dst = &isop->isop_faddr->siso_addr; | |
185 | if (isop->isop_laddr == 0) { | |
186 | struct iso_ifaddr *ia = 0; | |
187 | clnp_route(dst, &isop->isop_route, flags, 0, &ia); | |
188 | if (ia == 0 || ia->ia_ifa.ifa_addr->sa_family != AF_ISO) | |
189 | return (ENETUNREACH); | |
190 | src = &ia->ia_addr.siso_addr; | |
191 | } else | |
192 | src = &isop->isop_laddr->siso_addr; | |
193 | ||
194 | IFDEBUG(D_OUTPUT) | |
195 | printf("clnp_output: to %s", clnp_iso_addrp(dst)); | |
196 | printf(" from %s of %d bytes\n", clnp_iso_addrp(src), datalen); | |
197 | printf("\toptions x%x, flags x%x, isop_clnpcache x%x\n", | |
198 | isop->isop_options, flags, isop->isop_clnpcache); | |
199 | ENDDEBUG | |
200 | ||
201 | if (isop->isop_clnpcache != NULL) { | |
202 | clcp = mtod(isop->isop_clnpcache, struct clnp_cache *); | |
203 | } | |
204 | ||
205 | /* | |
206 | * Check if cache is valid ... | |
207 | */ | |
208 | IFDEBUG(D_OUTPUT) | |
209 | printf("clnp_output: ck cache: clcp %x\n", clcp); | |
210 | if (clcp != NULL) { | |
211 | printf("\tclc_dst %s\n", clnp_iso_addrp(&clcp->clc_dst)); | |
212 | printf("\tisop_opts x%x, clc_opts x%x\n", isop->isop_options, | |
213 | clcp->clc_options); | |
214 | if (isop->isop_route.ro_rt) | |
215 | printf("\tro_rt x%x, rt_flags x%x\n", | |
216 | isop->isop_route.ro_rt, isop->isop_route.ro_rt->rt_flags); | |
217 | printf("\tflags x%x, clc_flags x%x\n", flags, clcp->clc_flags); | |
218 | printf("\tclc_hdr x%x\n", clcp->clc_hdr); | |
219 | } | |
220 | ENDDEBUG | |
221 | if ((clcp != NULL) && /* cache exists */ | |
222 | (isop->isop_options == clcp->clc_options) && /* same options */ | |
223 | (iso_addrmatch1(dst, &clcp->clc_dst)) && /* dst still same */ | |
224 | (isop->isop_route.ro_rt != NULL) && /* route exists */ | |
225 | (isop->isop_route.ro_rt == clcp->clc_rt) && /* and is cached */ | |
226 | (isop->isop_route.ro_rt->rt_flags & RTF_UP) && /* route still up */ | |
227 | (flags == clcp->clc_flags) && /* same flags */ | |
228 | (clcp->clc_hdr != NULL)) { /* hdr mbuf exists */ | |
229 | /* | |
230 | * The cache is valid | |
231 | */ | |
232 | ||
233 | IFDEBUG(D_OUTPUT) | |
234 | printf("clnp_output: using cache\n"); | |
235 | ENDDEBUG | |
236 | ||
237 | m = m_copy(clcp->clc_hdr, 0, (int)M_COPYALL); | |
238 | if (m == NULL) { | |
239 | /* | |
240 | * No buffers left to copy cached packet header. Use | |
241 | * the cached packet header this time, and | |
242 | * mark the hdr as vacant | |
243 | */ | |
244 | m = clcp->clc_hdr; | |
245 | clcp->clc_hdr = NULL; | |
246 | } | |
247 | m->m_next = m0; /* ASSUMES pkt hdr is 1 mbuf long */ | |
248 | clnp = mtod(m, struct clnp_fixed *); | |
249 | } else { | |
250 | struct clnp_optidx *oidx = NULL; /* index to clnp options */ | |
251 | ||
252 | /* | |
253 | * The cache is not valid. Allocate an mbuf (if necessary) | |
254 | * to hold cached info. If one is not available, then | |
255 | * don't bother with the cache | |
256 | */ | |
257 | INCSTAT(cns_cachemiss); | |
258 | if (flags & CLNP_NOCACHE) { | |
259 | clcp = &clc; | |
260 | } else { | |
261 | if (isop->isop_clnpcache == NULL) { | |
262 | /* | |
263 | * There is no clnpcache. Allocate an mbuf to hold one | |
264 | */ | |
265 | if ((isop->isop_clnpcache = m_get(M_DONTWAIT, MT_HEADER)) | |
266 | == NULL) { | |
267 | /* | |
268 | * No mbufs available. Pretend that we don't want | |
269 | * caching this time. | |
270 | */ | |
271 | IFDEBUG(D_OUTPUT) | |
272 | printf("clnp_output: no mbufs to allocate to cache\n"); | |
273 | ENDDEBUG | |
274 | flags |= CLNP_NOCACHE; | |
275 | clcp = &clc; | |
276 | } else { | |
277 | clcp = mtod(isop->isop_clnpcache, struct clnp_cache *); | |
278 | } | |
279 | } else { | |
280 | /* | |
281 | * A clnpcache mbuf exists. If the clc_hdr is not null, | |
282 | * we must free it, as a new one is about to be created. | |
283 | */ | |
284 | clcp = mtod(isop->isop_clnpcache, struct clnp_cache *); | |
285 | if (clcp->clc_hdr != NULL) { | |
286 | /* | |
287 | * The clc_hdr is not null but a clnpcache mbuf exists. | |
288 | * This means that there was a cache, but the existing | |
289 | * copy of the hdr is no longer valid. Free it now | |
290 | * before we lose the pointer to it. | |
291 | */ | |
292 | IFDEBUG(D_OUTPUT) | |
293 | printf("clnp_output: freeing old clc_hdr 0x%x\n", | |
294 | clcp->clc_hdr); | |
295 | ENDDEBUG | |
296 | m_free(clcp->clc_hdr); | |
297 | IFDEBUG(D_OUTPUT) | |
298 | printf("clnp_output: freed old clc_hdr (done)\n"); | |
299 | ENDDEBUG | |
300 | } | |
301 | } | |
302 | } | |
303 | IFDEBUG(D_OUTPUT) | |
304 | printf("clnp_output: NEW clcp x%x\n",clcp); | |
305 | ENDDEBUG | |
306 | bzero((caddr_t)clcp, sizeof(struct clnp_cache)); | |
307 | ||
308 | if (isop->isop_optindex) | |
309 | oidx = mtod(isop->isop_optindex, struct clnp_optidx *); | |
310 | ||
311 | /* | |
312 | * Don't allow packets with security, quality of service, | |
313 | * priority, or error report options to be sent. | |
314 | */ | |
315 | if ((isop->isop_options) && (oidx)) { | |
316 | if ((oidx->cni_securep) || | |
317 | (oidx->cni_priorp) || | |
318 | (oidx->cni_qos_formatp) || | |
319 | (oidx->cni_er_reason != ER_INVALREAS)) { | |
320 | IFDEBUG(D_OUTPUT) | |
321 | printf("clnp_output: pkt dropped - option unsupported\n"); | |
322 | ENDDEBUG | |
323 | m_freem(m0); | |
324 | return(EINVAL); | |
325 | } | |
326 | } | |
327 | ||
328 | /* | |
329 | * Don't allow any invalid flags to be set | |
330 | */ | |
331 | if ((flags & (CLNP_VFLAGS)) != flags) { | |
332 | IFDEBUG(D_OUTPUT) | |
333 | printf("clnp_output: packet dropped - flags unsupported\n"); | |
334 | ENDDEBUG | |
335 | INCSTAT(cns_odropped); | |
336 | m_freem(m0); | |
337 | return(EINVAL); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Don't allow funny lengths on dst; src may be zero in which | |
342 | * case we insert the source address based upon the interface | |
343 | */ | |
344 | if ((src->isoa_len > sizeof(struct iso_addr)) || | |
345 | (dst->isoa_len == 0) || | |
346 | (dst->isoa_len > sizeof(struct iso_addr))) { | |
347 | m_freem(m0); | |
348 | INCSTAT(cns_odropped); | |
349 | return(ENAMETOOLONG); | |
350 | } | |
351 | ||
352 | /* | |
353 | * Grab mbuf to contain header | |
354 | */ | |
355 | MGETHDR(m, M_DONTWAIT, MT_HEADER); | |
356 | if (m == 0) { | |
357 | m_freem(m0); | |
358 | INCSTAT(cns_odropped); | |
359 | return(ENOBUFS); | |
360 | } | |
361 | INCSTAT(cns_sent); | |
362 | m->m_next = m0; | |
363 | clnp = mtod(m, struct clnp_fixed *); | |
364 | clcp->clc_segoff = 0; | |
365 | ||
366 | /* | |
367 | * Fill in all of fixed hdr except lengths and checksum | |
368 | */ | |
369 | if (flags & CLNP_SEND_RAW) { | |
370 | *clnp = raw_template; | |
371 | } else if (flags & CLNP_ECHO) { | |
372 | *clnp = echo_template; | |
373 | } else { | |
374 | *clnp = dt_template; | |
375 | } | |
376 | if (flags & CLNP_NO_SEG) | |
377 | clnp->cnf_type &= ~CNF_SEG_OK; | |
378 | if (flags & CLNP_NO_ER) | |
379 | clnp->cnf_type &= ~CNF_ERR_OK; | |
380 | ||
381 | /* | |
382 | * Route packet; special case for source rt | |
383 | */ | |
384 | if ((isop->isop_options) && CLNPSRCRT_VALID(oidx)) { | |
385 | IFDEBUG(D_OUTPUT) | |
386 | printf("clnp_output: calling clnp_srcroute\n"); | |
387 | ENDDEBUG | |
388 | error = clnp_srcroute(isop->isop_options, oidx, &isop->isop_route, | |
389 | &clcp->clc_firsthop, &clcp->clc_ifa, dst); | |
390 | } else { | |
391 | IFDEBUG(D_OUTPUT) | |
392 | ENDDEBUG | |
393 | error = clnp_route(dst, &isop->isop_route, flags, | |
394 | &clcp->clc_firsthop, &clcp->clc_ifa); | |
395 | } | |
396 | if (error || (clcp->clc_ifa == 0)) { | |
397 | IFDEBUG(D_OUTPUT) | |
398 | printf("clnp_output: route failed, errno %d\n", error); | |
399 | printf("@clcp:\n"); | |
400 | dump_buf(clcp, sizeof (struct clnp_cache)); | |
401 | ENDDEBUG | |
402 | goto bad; | |
403 | } | |
404 | clcp->clc_rt = isop->isop_route.ro_rt; /* XXX */ | |
405 | clcp->clc_ifp = clcp->clc_ifa->ia_ifp; /* XXX */ | |
406 | ||
407 | IFDEBUG(D_OUTPUT) | |
408 | printf("clnp_output: packet routed to %s\n", | |
409 | clnp_iso_addrp( | |
410 | &((struct sockaddr_iso *)clcp->clc_firsthop)->siso_addr)); | |
411 | ENDDEBUG | |
412 | ||
413 | /* | |
414 | * If src address is not yet specified, use address of | |
415 | * interface. NOTE: this will now update the laddr field in | |
416 | * the isopcb. Is this desirable? RAH? | |
417 | */ | |
418 | if (src->isoa_len == 0) { | |
419 | src = &(clcp->clc_ifa->ia_addr.siso_addr); | |
420 | IFDEBUG(D_OUTPUT) | |
421 | printf("clnp_output: new src %s\n", clnp_iso_addrp(src)); | |
422 | ENDDEBUG | |
423 | } | |
424 | ||
425 | /* | |
426 | * Insert the source and destination address, | |
427 | */ | |
428 | hoff = (caddr_t)clnp + sizeof(struct clnp_fixed); | |
429 | CLNP_INSERT_ADDR(hoff, *dst); | |
430 | CLNP_INSERT_ADDR(hoff, *src); | |
431 | ||
432 | /* | |
433 | * Leave room for the segment part, if segmenting is selected | |
434 | */ | |
435 | if (clnp->cnf_type & CNF_SEG_OK) { | |
436 | clcp->clc_segoff = hoff - (caddr_t)clnp; | |
437 | hoff += sizeof(struct clnp_segment); | |
438 | } | |
439 | ||
440 | clnp->cnf_hdr_len = m->m_len = (u_char)(hoff - (caddr_t)clnp); | |
441 | hdrlen = clnp->cnf_hdr_len; | |
442 | ||
443 | #ifdef DECBIT | |
444 | /* | |
445 | * Add the globally unique QOS (with room for congestion experienced | |
446 | * bit). I can safely assume that this option is not in the options | |
447 | * mbuf below because I checked that the option was not specified | |
448 | * previously | |
449 | */ | |
450 | if ((m->m_len + sizeof(qos_option)) < MLEN) { | |
451 | bcopy((caddr_t)qos_option, hoff, sizeof(qos_option)); | |
452 | clnp->cnf_hdr_len += sizeof(qos_option); | |
453 | hdrlen += sizeof(qos_option); | |
454 | m->m_len += sizeof(qos_option); | |
455 | } | |
456 | #endif DECBIT | |
457 | ||
458 | /* | |
459 | * If an options mbuf is present, concatenate a copy to the hdr mbuf. | |
460 | */ | |
461 | if (isop->isop_options) { | |
462 | struct mbuf *opt_copy = m_copy(isop->isop_options, 0, (int)M_COPYALL); | |
463 | if (opt_copy == NULL) { | |
464 | error = ENOBUFS; | |
465 | goto bad; | |
466 | } | |
467 | /* Link in place */ | |
468 | opt_copy->m_next = m->m_next; | |
469 | m->m_next = opt_copy; | |
470 | ||
471 | /* update size of header */ | |
472 | clnp->cnf_hdr_len += opt_copy->m_len; | |
473 | hdrlen += opt_copy->m_len; | |
474 | } | |
475 | ||
476 | if (hdrlen > CLNP_HDR_MAX) { | |
477 | error = EMSGSIZE; | |
478 | goto bad; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Now set up the cache entry in the pcb | |
483 | */ | |
484 | if ((flags & CLNP_NOCACHE) == 0) { | |
485 | if (clcp->clc_hdr = m_copy(m, 0, (int)clnp->cnf_hdr_len)) { | |
486 | clcp->clc_dst = *dst; | |
487 | clcp->clc_flags = flags; | |
488 | clcp->clc_options = isop->isop_options; | |
489 | } | |
490 | } | |
491 | } | |
492 | /* | |
493 | * If small enough for interface, send directly | |
494 | * Fill in segmentation part of hdr if using the full protocol | |
495 | */ | |
496 | total_len = clnp->cnf_hdr_len + datalen; | |
497 | if (clnp->cnf_type & CNF_SEG_OK) { | |
498 | struct clnp_segment seg_part; /* segment part of hdr */ | |
499 | seg_part.cng_id = htons(clnp_id++); | |
500 | seg_part.cng_off = htons(0); | |
501 | seg_part.cng_tot_len = htons(total_len); | |
502 | (void) bcopy((caddr_t)&seg_part, (caddr_t) clnp + clcp->clc_segoff, | |
503 | sizeof(seg_part)); | |
504 | } | |
505 | if (total_len <= SN_MTU(clcp->clc_ifp, clcp->clc_rt)) { | |
506 | HTOC(clnp->cnf_seglen_msb, clnp->cnf_seglen_lsb, total_len); | |
507 | m->m_pkthdr.len = total_len; | |
508 | /* | |
509 | * Compute clnp checksum (on header only) | |
510 | */ | |
511 | if (flags & CLNP_NO_CKSUM) { | |
512 | HTOC(clnp->cnf_cksum_msb, clnp->cnf_cksum_lsb, 0); | |
513 | } else { | |
514 | iso_gen_csum(m, CLNP_CKSUM_OFF, (int)clnp->cnf_hdr_len); | |
515 | } | |
516 | ||
517 | IFDEBUG(D_DUMPOUT) | |
518 | struct mbuf *mdump = m; | |
519 | printf("clnp_output: sending dg:\n"); | |
520 | while (mdump != NULL) { | |
521 | dump_buf(mtod(mdump, caddr_t), mdump->m_len); | |
522 | mdump = mdump->m_next; | |
523 | } | |
524 | ENDDEBUG | |
525 | ||
526 | error = SN_OUTPUT(clcp, m); | |
527 | goto done; | |
528 | } else { | |
529 | /* | |
530 | * Too large for interface; fragment if possible. | |
531 | */ | |
532 | error = clnp_fragment(clcp->clc_ifp, m, clcp->clc_firsthop, | |
533 | total_len, clcp->clc_segoff, flags, clcp->clc_rt); | |
534 | goto done; | |
535 | } | |
536 | bad: | |
537 | m_freem(m); | |
538 | done: | |
539 | if (error) { | |
540 | clnp_stat.cns_sent--; | |
541 | clnp_stat.cns_odropped++; | |
542 | } | |
543 | return (error); | |
544 | } | |
545 | ||
546 | int clnp_ctloutput() | |
547 | { | |
548 | } |