ip_options.c (57b8628bb0ac4e47c806e45c5bbd89282e93869b) ip_options.c (e87cc4728f0e2fb663e592a1141742b1d6c63256)
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * The options processing module for ip.c
7 *
8 * Authors: A.N.Kuznetsov

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

205}
206
207/*
208 * Options "fragmenting", just fill options not
209 * allowed in fragments with NOOPs.
210 * Simple and stupid 8), but the most efficient way.
211 */
212
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * The options processing module for ip.c
7 *
8 * Authors: A.N.Kuznetsov

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

205}
206
207/*
208 * Options "fragmenting", just fill options not
209 * allowed in fragments with NOOPs.
210 * Simple and stupid 8), but the most efficient way.
211 */
212
213void ip_options_fragment(struct sk_buff * skb)
213void ip_options_fragment(struct sk_buff *skb)
214{
215 unsigned char *optptr = skb_network_header(skb) + sizeof(struct iphdr);
214{
215 unsigned char *optptr = skb_network_header(skb) + sizeof(struct iphdr);
216 struct ip_options * opt = &(IPCB(skb)->opt);
216 struct ip_options *opt = &(IPCB(skb)->opt);
217 int l = opt->optlen;
218 int optlen;
219
220 while (l > 0) {
221 switch (*optptr) {
222 case IPOPT_END:
223 return;
224 case IPOPT_NOOP:

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

243
244/*
245 * Verify options and fill pointers in struct options.
246 * Caller should clear *opt, and set opt->data.
247 * If opt == NULL, then skb->data should point to IP header.
248 */
249
250int ip_options_compile(struct net *net,
217 int l = opt->optlen;
218 int optlen;
219
220 while (l > 0) {
221 switch (*optptr) {
222 case IPOPT_END:
223 return;
224 case IPOPT_NOOP:

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

243
244/*
245 * Verify options and fill pointers in struct options.
246 * Caller should clear *opt, and set opt->data.
247 * If opt == NULL, then skb->data should point to IP header.
248 */
249
250int ip_options_compile(struct net *net,
251 struct ip_options * opt, struct sk_buff * skb)
251 struct ip_options *opt, struct sk_buff *skb)
252{
253 int l;
252{
253 int l;
254 unsigned char * iph;
255 unsigned char * optptr;
254 unsigned char *iph;
255 unsigned char *optptr;
256 int optlen;
256 int optlen;
257 unsigned char * pp_ptr = NULL;
257 unsigned char *pp_ptr = NULL;
258 struct rtable *rt = NULL;
259
260 if (skb != NULL) {
261 rt = skb_rtable(skb);
262 optptr = (unsigned char *)&(ip_hdr(skb)[1]);
263 } else
264 optptr = opt->__data;
265 iph = optptr - sizeof(struct iphdr);

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

408 struct timespec tv;
409 u32 midtime;
410 getnstimeofday(&tv);
411 midtime = (tv.tv_sec % 86400) * MSEC_PER_SEC + tv.tv_nsec / NSEC_PER_MSEC;
412 put_unaligned_be32(midtime, timeptr);
413 opt->is_changed = 1;
414 }
415 } else {
258 struct rtable *rt = NULL;
259
260 if (skb != NULL) {
261 rt = skb_rtable(skb);
262 optptr = (unsigned char *)&(ip_hdr(skb)[1]);
263 } else
264 optptr = opt->__data;
265 iph = optptr - sizeof(struct iphdr);

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

408 struct timespec tv;
409 u32 midtime;
410 getnstimeofday(&tv);
411 midtime = (tv.tv_sec % 86400) * MSEC_PER_SEC + tv.tv_nsec / NSEC_PER_MSEC;
412 put_unaligned_be32(midtime, timeptr);
413 opt->is_changed = 1;
414 }
415 } else {
416 unsigned overflow = optptr[3]>>4;
416 unsigned int overflow = optptr[3]>>4;
417 if (overflow == 15) {
418 pp_ptr = optptr + 3;
419 goto error;
420 }
421 opt->ts = optptr - iph;
422 if (skb) {
423 optptr[3] = (optptr[3]&0xF)|((overflow+1)<<4);
424 opt->is_changed = 1;

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

468 return -EINVAL;
469}
470EXPORT_SYMBOL(ip_options_compile);
471
472/*
473 * Undo all the changes done by ip_options_compile().
474 */
475
417 if (overflow == 15) {
418 pp_ptr = optptr + 3;
419 goto error;
420 }
421 opt->ts = optptr - iph;
422 if (skb) {
423 optptr[3] = (optptr[3]&0xF)|((overflow+1)<<4);
424 opt->is_changed = 1;

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

468 return -EINVAL;
469}
470EXPORT_SYMBOL(ip_options_compile);
471
472/*
473 * Undo all the changes done by ip_options_compile().
474 */
475
476void ip_options_undo(struct ip_options * opt)
476void ip_options_undo(struct ip_options *opt)
477{
478 if (opt->srr) {
477{
478 if (opt->srr) {
479 unsigned char * optptr = opt->__data+opt->srr-sizeof(struct iphdr);
479 unsigned char *optptr = opt->__data+opt->srr-sizeof(struct iphdr);
480 memmove(optptr+7, optptr+3, optptr[1]-7);
481 memcpy(optptr+3, &opt->faddr, 4);
482 }
483 if (opt->rr_needaddr) {
480 memmove(optptr+7, optptr+3, optptr[1]-7);
481 memcpy(optptr+3, &opt->faddr, 4);
482 }
483 if (opt->rr_needaddr) {
484 unsigned char * optptr = opt->__data+opt->rr-sizeof(struct iphdr);
484 unsigned char *optptr = opt->__data+opt->rr-sizeof(struct iphdr);
485 optptr[2] -= 4;
486 memset(&optptr[optptr[2]-1], 0, 4);
487 }
488 if (opt->ts) {
485 optptr[2] -= 4;
486 memset(&optptr[optptr[2]-1], 0, 4);
487 }
488 if (opt->ts) {
489 unsigned char * optptr = opt->__data+opt->ts-sizeof(struct iphdr);
489 unsigned char *optptr = opt->__data+opt->ts-sizeof(struct iphdr);
490 if (opt->ts_needtime) {
491 optptr[2] -= 4;
492 memset(&optptr[optptr[2]-1], 0, 4);
493 if ((optptr[3]&0xF) == IPOPT_TS_PRESPEC)
494 optptr[2] -= 4;
495 }
496 if (opt->ts_needaddr) {
497 optptr[2] -= 4;

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

544 return -ENOMEM;
545 if (optlen)
546 memcpy(opt->opt.__data, data, optlen);
547 return ip_options_get_finish(net, optp, opt, optlen);
548}
549
550void ip_forward_options(struct sk_buff *skb)
551{
490 if (opt->ts_needtime) {
491 optptr[2] -= 4;
492 memset(&optptr[optptr[2]-1], 0, 4);
493 if ((optptr[3]&0xF) == IPOPT_TS_PRESPEC)
494 optptr[2] -= 4;
495 }
496 if (opt->ts_needaddr) {
497 optptr[2] -= 4;

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

544 return -ENOMEM;
545 if (optlen)
546 memcpy(opt->opt.__data, data, optlen);
547 return ip_options_get_finish(net, optp, opt, optlen);
548}
549
550void ip_forward_options(struct sk_buff *skb)
551{
552 struct ip_options * opt = &(IPCB(skb)->opt);
553 unsigned char * optptr;
552 struct ip_options *opt = &(IPCB(skb)->opt);
553 unsigned char *optptr;
554 struct rtable *rt = skb_rtable(skb);
555 unsigned char *raw = skb_network_header(skb);
556
557 if (opt->rr_needaddr) {
558 optptr = (unsigned char *)raw + opt->rr;
559 ip_rt_get_source(&optptr[optptr[2]-5], skb, rt);
560 opt->is_changed = 1;
561 }

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

573 if (memcmp(&opt->nexthop, &optptr[srrptr-1], 4) == 0)
574 break;
575 }
576 if (srrptr + 3 <= srrspace) {
577 opt->is_changed = 1;
578 ip_hdr(skb)->daddr = opt->nexthop;
579 ip_rt_get_source(&optptr[srrptr-1], skb, rt);
580 optptr[2] = srrptr+4;
554 struct rtable *rt = skb_rtable(skb);
555 unsigned char *raw = skb_network_header(skb);
556
557 if (opt->rr_needaddr) {
558 optptr = (unsigned char *)raw + opt->rr;
559 ip_rt_get_source(&optptr[optptr[2]-5], skb, rt);
560 opt->is_changed = 1;
561 }

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

573 if (memcmp(&opt->nexthop, &optptr[srrptr-1], 4) == 0)
574 break;
575 }
576 if (srrptr + 3 <= srrspace) {
577 opt->is_changed = 1;
578 ip_hdr(skb)->daddr = opt->nexthop;
579 ip_rt_get_source(&optptr[srrptr-1], skb, rt);
580 optptr[2] = srrptr+4;
581 } else if (net_ratelimit())
582 pr_crit("%s(): Argh! Destination lost!\n", __func__);
581 } else {
582 net_crit_ratelimited("%s(): Argh! Destination lost!\n",
583 __func__);
584 }
583 if (opt->ts_needaddr) {
584 optptr = raw + opt->ts;
585 ip_rt_get_source(&optptr[optptr[2]-9], skb, rt);
586 opt->is_changed = 1;
587 }
588 }
589 if (opt->is_changed) {
590 opt->is_changed = 0;

--- 61 unchanged lines hidden --- 		585 if (opt->ts_needaddr) {
586 optptr = raw + opt->ts;
587 ip_rt_get_source(&optptr[optptr[2]-9], skb, rt);
588 opt->is_changed = 1;
589 }
590 }
591 if (opt->is_changed) {
592 opt->is_changed = 0;

--- 61 unchanged lines hidden ---