Deleted Added
sdiff udiff text old ( 47061 ) new ( 47695 )
full compact
nat_cmd.c (47061) nat_cmd.c (47695)
1/*-
2 * The code in this file was written by Eivind Eklund <perhaps@yes.no>,
3 * who places it in the public domain without restriction.
4 *
1/*-
2 * The code in this file was written by Eivind Eklund <perhaps@yes.no>,
3 * who places it in the public domain without restriction.
4 *
5 * $Id: alias_cmd.c,v 1.24 1999/05/08 11:05:59 brian Exp $
5 * $Id: alias_cmd.c,v 1.25 1999/05/12 09:48:39 brian Exp $
6 */
7
8#include <sys/param.h>
9#include <netinet/in.h>
10#include <arpa/inet.h>
11#include <netdb.h>
12#include <netinet/in_systm.h>
13#include <netinet/in.h>

--- 294 unchanged lines hidden (view full) ---

308}
309
310static struct mbuf *
311alias_PadMbuf(struct mbuf *bp, int type)
312{
313 struct mbuf **last;
314 int len;
315
6 */
7
8#include <sys/param.h>
9#include <netinet/in.h>
10#include <arpa/inet.h>
11#include <netdb.h>
12#include <netinet/in_systm.h>
13#include <netinet/in.h>

--- 294 unchanged lines hidden (view full) ---

308}
309
310static struct mbuf *
311alias_PadMbuf(struct mbuf *bp, int type)
312{
313 struct mbuf **last;
314 int len;
315
316 mbuf_SetType(bp, type);
316 for (last = &bp, len = 0; *last != NULL; last = &(*last)->next)
317 len += (*last)->cnt;
318
319 len = MAX_MRU - len;
320 *last = mbuf_Alloc(len, type);
321
322 return bp;
323}
324
325static struct mbuf *
326alias_LayerPush(struct bundle *bundle, struct link *l, struct mbuf *bp,
327 int pri, u_short *proto)
328{
329 if (!bundle->AliasEnabled || *proto != PROTO_IP)
330 return bp;
331
332 log_Printf(LogDEBUG, "alias_LayerPush: PROTO_IP -> PROTO_IP\n");
317 for (last = &bp, len = 0; *last != NULL; last = &(*last)->next)
318 len += (*last)->cnt;
319
320 len = MAX_MRU - len;
321 *last = mbuf_Alloc(len, type);
322
323 return bp;
324}
325
326static struct mbuf *
327alias_LayerPush(struct bundle *bundle, struct link *l, struct mbuf *bp,
328 int pri, u_short *proto)
329{
330 if (!bundle->AliasEnabled || *proto != PROTO_IP)
331 return bp;
332
333 log_Printf(LogDEBUG, "alias_LayerPush: PROTO_IP -> PROTO_IP\n");
333 bp = mbuf_Contiguous(alias_PadMbuf(bp, MB_IPQ));
334 bp = mbuf_Contiguous(alias_PadMbuf(bp, MB_ALIASOUT));
334 PacketAliasOut(MBUF_CTOP(bp), bp->cnt);
335 bp->cnt = ntohs(((struct ip *)MBUF_CTOP(bp))->ip_len);
336
337 return bp;
338}
339
340static struct mbuf *
341alias_LayerPull(struct bundle *bundle, struct link *l, struct mbuf *bp,
342 u_short *proto)
343{
344 struct ip *pip, *piip;
345 int ret;
346 struct mbuf **last;
347 char *fptr;
348
349 if (!bundle->AliasEnabled || *proto != PROTO_IP)
350 return bp;
351
352 log_Printf(LogDEBUG, "alias_LayerPull: PROTO_IP -> PROTO_IP\n");
335 PacketAliasOut(MBUF_CTOP(bp), bp->cnt);
336 bp->cnt = ntohs(((struct ip *)MBUF_CTOP(bp))->ip_len);
337
338 return bp;
339}
340
341static struct mbuf *
342alias_LayerPull(struct bundle *bundle, struct link *l, struct mbuf *bp,
343 u_short *proto)
344{
345 struct ip *pip, *piip;
346 int ret;
347 struct mbuf **last;
348 char *fptr;
349
350 if (!bundle->AliasEnabled || *proto != PROTO_IP)
351 return bp;
352
353 log_Printf(LogDEBUG, "alias_LayerPull: PROTO_IP -> PROTO_IP\n");
353 bp = mbuf_Contiguous(alias_PadMbuf(bp, MB_IPIN));
354 bp = mbuf_Contiguous(alias_PadMbuf(bp, MB_ALIASIN));
354 pip = (struct ip *)MBUF_CTOP(bp);
355 piip = (struct ip *)((char *)pip + (pip->ip_hl << 2));
356
357 if (pip->ip_p == IPPROTO_IGMP ||
358 (pip->ip_p == IPPROTO_IPIP && IN_CLASSD(ntohl(piip->ip_dst.s_addr))))
359 return bp;
360
361 ret = PacketAliasIn(MBUF_CTOP(bp), bp->cnt);

--- 16 unchanged lines hidden (view full) ---

378 PacketAliasSaveFragment(fptr);
379 break;
380
381 case PKT_ALIAS_FOUND_HEADER_FRAGMENT:
382 /* Fetch all the saved fragments and chain them on the end of `bp' */
383 last = &bp->pnext;
384 while ((fptr = PacketAliasGetFragment(MBUF_CTOP(bp))) != NULL) {
385 PacketAliasFragmentIn(MBUF_CTOP(bp), fptr);
355 pip = (struct ip *)MBUF_CTOP(bp);
356 piip = (struct ip *)((char *)pip + (pip->ip_hl << 2));
357
358 if (pip->ip_p == IPPROTO_IGMP ||
359 (pip->ip_p == IPPROTO_IPIP && IN_CLASSD(ntohl(piip->ip_dst.s_addr))))
360 return bp;
361
362 ret = PacketAliasIn(MBUF_CTOP(bp), bp->cnt);

--- 16 unchanged lines hidden (view full) ---

379 PacketAliasSaveFragment(fptr);
380 break;
381
382 case PKT_ALIAS_FOUND_HEADER_FRAGMENT:
383 /* Fetch all the saved fragments and chain them on the end of `bp' */
384 last = &bp->pnext;
385 while ((fptr = PacketAliasGetFragment(MBUF_CTOP(bp))) != NULL) {
386 PacketAliasFragmentIn(MBUF_CTOP(bp), fptr);
386 *last = mbuf_Alloc(ntohs(((struct ip *)fptr)->ip_len), MB_IPIN);
387 *last = mbuf_Alloc(ntohs(((struct ip *)fptr)->ip_len), MB_ALIASIN);
387 memcpy(MBUF_CTOP(*last), fptr, (*last)->cnt);
388 free(fptr);
389 last = &(*last)->pnext;
390 }
391 break;
392
393 default:
394 mbuf_Free(bp);
395 bp = NULL;
396 break;
397 }
398
399 return bp;
400}
401
402struct layer aliaslayer =
403 { LAYER_ALIAS, "alias", alias_LayerPush, alias_LayerPull };
388 memcpy(MBUF_CTOP(*last), fptr, (*last)->cnt);
389 free(fptr);
390 last = &(*last)->pnext;
391 }
392 break;
393
394 default:
395 mbuf_Free(bp);
396 bp = NULL;
397 break;
398 }
399
400 return bp;
401}
402
403struct layer aliaslayer =
404 { LAYER_ALIAS, "alias", alias_LayerPush, alias_LayerPull };