44 void ip_options_build(struct sk_buff *skb, struct ip_options *opt,  in ip_options_build()  argument
49 	memcpy(&(IPCB(skb)->opt), opt, sizeof(struct ip_options));  in ip_options_build()
50 	memcpy(iph + sizeof(struct iphdr), opt->__data, opt->optlen);  in ip_options_build()
51 	opt = &(IPCB(skb)->opt);  in ip_options_build()
53 	if (opt->srr)  in ip_options_build()
54 		memcpy(iph + opt->srr + iph[opt->srr + 1] - 4, &daddr, 4);  in ip_options_build()
57 		if (opt->rr_needaddr)  in ip_options_build()
58 			ip_rt_get_source(iph + opt->rr + iph[opt->rr + 2] - 5, skb, rt);  in ip_options_build()
59 		if (opt->ts_needaddr)  in ip_options_build()
60 			ip_rt_get_source(iph + opt->ts + iph[opt->ts + 2] - 9, skb, rt);  in ip_options_build()
61 		if (opt->ts_needtime) {  in ip_options_build()
65 			memcpy(iph + opt->ts + iph[opt->ts + 2] - 5, &midtime, 4);  in ip_options_build()
69 	if (opt->rr) {  in ip_options_build()
70 		memset(iph + opt->rr, IPOPT_NOP, iph[opt->rr + 1]);  in ip_options_build()
71 		opt->rr = 0;  in ip_options_build()
72 		opt->rr_needaddr = 0;  in ip_options_build()
74 	if (opt->ts) {  in ip_options_build()
75 		memset(iph + opt->ts, IPOPT_NOP, iph[opt->ts + 1]);  in ip_options_build()
76 		opt->ts = 0;  in ip_options_build()
77 		opt->ts_needaddr = opt->ts_needtime = 0;  in ip_options_build()
211 	struct ip_options *opt = &(IPCB(skb)->opt);  in ip_options_fragment()  local
212 	int  l = opt->optlen;  in ip_options_fragment()
232 	opt->ts = 0;  in ip_options_fragment()
233 	opt->rr = 0;  in ip_options_fragment()
234 	opt->rr_needaddr = 0;  in ip_options_fragment()
235 	opt->ts_needaddr = 0;  in ip_options_fragment()
236 	opt->ts_needtime = 0;  in ip_options_fragment()
255 			 struct ip_options *opt, struct sk_buff *skb,  in __ip_options_compile()  argument
269 		optptr = opt->__data;  in __ip_options_compile()
272 	for (l = opt->optlen; l > 0; ) {  in __ip_options_compile()
278 					opt->is_changed = 1;  in __ip_options_compile()
308 			if (opt->srr) {  in __ip_options_compile()
317 				memcpy(&opt->faddr, &optptr[3], 4);  in __ip_options_compile()
321 			opt->is_strictroute = (optptr[0] == IPOPT_SSRR);  in __ip_options_compile()
322 			opt->srr = optptr - iph;  in __ip_options_compile()
325 			if (opt->rr) {  in __ip_options_compile()
345 					opt->is_changed = 1;  in __ip_options_compile()
348 				opt->rr_needaddr = 1;  in __ip_options_compile()
350 			opt->rr = optptr - iph;  in __ip_options_compile()
353 			if (opt->ts) {  in __ip_options_compile()
375 					opt->ts_needtime = 1;  in __ip_options_compile()
388 					opt->ts_needaddr = 1;  in __ip_options_compile()
389 					opt->ts_needtime = 1;  in __ip_options_compile()
405 					opt->ts_needtime = 1;  in __ip_options_compile()
420 					opt->is_changed = 1;  in __ip_options_compile()
430 					opt->is_changed = 1;  in __ip_options_compile()
433 			opt->ts = optptr - iph;  in __ip_options_compile()
441 				opt->router_alert = optptr - iph;  in __ip_options_compile()
444 			if ((!skb && !ns_capable(net->user_ns, CAP_NET_RAW)) || opt->cipso) {  in __ip_options_compile()
448 			opt->cipso = optptr - iph;  in __ip_options_compile()
479 		       struct ip_options *opt, struct sk_buff *skb)  in ip_options_compile()  argument
484 	ret = __ip_options_compile(net, opt, skb, &info);  in ip_options_compile()
495 void ip_options_undo(struct ip_options *opt)  in ip_options_undo()  argument
497 	if (opt->srr) {  in ip_options_undo()
498 		unsigned char *optptr = opt->__data + opt->srr - sizeof(struct iphdr);  in ip_options_undo()
501 		memcpy(optptr + 3, &opt->faddr, 4);  in ip_options_undo()
503 	if (opt->rr_needaddr) {  in ip_options_undo()
504 		unsigned char *optptr = opt->__data + opt->rr - sizeof(struct iphdr);  in ip_options_undo()
509 	if (opt->ts) {  in ip_options_undo()
510 		unsigned char *optptr = opt->__data + opt->ts - sizeof(struct iphdr);  in ip_options_undo()
512 		if (opt->ts_needtime) {  in ip_options_undo()
518 		if (opt->ts_needaddr) {  in ip_options_undo()
528 	struct ip_options_rcu *opt;  in ip_options_get()  local
530 	opt = kzalloc(sizeof(struct ip_options_rcu) + ((optlen + 3) & ~3),  in ip_options_get()
532 	if (!opt)  in ip_options_get()
534 	if (optlen && copy_from_sockptr(opt->opt.__data, data, optlen)) {  in ip_options_get()
535 		kfree(opt);  in ip_options_get()
540 		opt->opt.__data[optlen++] = IPOPT_END;  in ip_options_get()
541 	opt->opt.optlen = optlen;  in ip_options_get()
542 	if (optlen && ip_options_compile(net, &opt->opt, NULL)) {  in ip_options_get()
543 		kfree(opt);  in ip_options_get()
547 	*optp = opt;  in ip_options_get()
553 	struct   ip_options *opt	= &(IPCB(skb)->opt);  in ip_forward_options()  local
558 	if (opt->rr_needaddr) {  in ip_forward_options()
559 		optptr = (unsigned char *)raw + opt->rr;  in ip_forward_options()
561 		opt->is_changed = 1;  in ip_forward_options()
563 	if (opt->srr_is_hit) {  in ip_forward_options()
566 		optptr = raw + opt->srr;  in ip_forward_options()
574 			if (memcmp(&opt->nexthop, &optptr[srrptr-1], 4) == 0)  in ip_forward_options()
578 			opt->is_changed = 1;  in ip_forward_options()
579 			ip_hdr(skb)->daddr = opt->nexthop;  in ip_forward_options()
586 		if (opt->ts_needaddr) {  in ip_forward_options()
587 			optptr = raw + opt->ts;  in ip_forward_options()
589 			opt->is_changed = 1;  in ip_forward_options()
592 	if (opt->is_changed) {  in ip_forward_options()
593 		opt->is_changed = 0;  in ip_forward_options()
600 	struct ip_options *opt = &(IPCB(skb)->opt);  in ip_options_rcv_srr()  local
604 	unsigned char *optptr = skb_network_header(skb) + opt->srr;  in ip_options_rcv_srr()
616 		if (!opt->is_strictroute)  in ip_options_rcv_srr()
626 			icmp_send(skb, ICMP_PARAMETERPROB, 0, htonl((opt->srr+2)<<24));  in ip_options_rcv_srr()
645 		opt->is_changed = 1;  in ip_options_rcv_srr()
648 		opt->srr_is_hit = 1;  in ip_options_rcv_srr()
649 		opt->nexthop = nexthop;  in ip_options_rcv_srr()
650 		opt->is_changed = 1;  in ip_options_rcv_srr()