Lines Matching refs:skb
64 bool (*func)(struct sk_buff *skb, int offset);
73 static bool ip6_tlvopt_unknown(struct sk_buff *skb, int optoff, in ip6_tlvopt_unknown() argument
87 switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) { in ip6_tlvopt_unknown()
98 if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr)) in ip6_tlvopt_unknown()
102 icmpv6_param_prob(skb, ICMPV6_UNK_OPTION, optoff); in ip6_tlvopt_unknown()
107 kfree_skb(skb); in ip6_tlvopt_unknown()
114 struct sk_buff *skb, in ip6_parse_tlv() argument
117 int len = (skb_transport_header(skb)[1] + 1) << 3; in ip6_parse_tlv()
118 const unsigned char *nh = skb_network_header(skb); in ip6_parse_tlv()
119 int off = skb_network_header_len(skb); in ip6_parse_tlv()
130 if (skb_transport_offset(skb) + len > skb_headlen(skb)) in ip6_parse_tlv()
180 if (curr->func(skb, off) == false) in ip6_parse_tlv()
186 !ip6_tlvopt_unknown(skb, off, disallow_unknowns)) in ip6_parse_tlv()
199 kfree_skb(skb); in ip6_parse_tlv()
208 static bool ipv6_dest_hao(struct sk_buff *skb, int optoff) in ipv6_dest_hao() argument
211 struct inet6_skb_parm *opt = IP6CB(skb); in ipv6_dest_hao()
212 struct ipv6hdr *ipv6h = ipv6_hdr(skb); in ipv6_dest_hao()
222 hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) + optoff); in ipv6_dest_hao()
236 ret = xfrm6_input_addr(skb, (xfrm_address_t *)&ipv6h->daddr, in ipv6_dest_hao()
241 if (skb_cloned(skb)) { in ipv6_dest_hao()
242 if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) in ipv6_dest_hao()
246 hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) + in ipv6_dest_hao()
248 ipv6h = ipv6_hdr(skb); in ipv6_dest_hao()
251 if (skb->ip_summed == CHECKSUM_COMPLETE) in ipv6_dest_hao()
252 skb->ip_summed = CHECKSUM_NONE; in ipv6_dest_hao()
256 if (skb->tstamp == 0) in ipv6_dest_hao()
257 __net_timestamp(skb); in ipv6_dest_hao()
262 kfree_skb(skb); in ipv6_dest_hao()
277 static int ipv6_destopt_rcv(struct sk_buff *skb) in ipv6_destopt_rcv() argument
279 struct inet6_dev *idev = __in6_dev_get(skb->dev); in ipv6_destopt_rcv()
280 struct inet6_skb_parm *opt = IP6CB(skb); in ipv6_destopt_rcv()
284 struct dst_entry *dst = skb_dst(skb); in ipv6_destopt_rcv()
285 struct net *net = dev_net(skb->dev); in ipv6_destopt_rcv()
288 if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) || in ipv6_destopt_rcv()
289 !pskb_may_pull(skb, (skb_transport_offset(skb) + in ipv6_destopt_rcv()
290 ((skb_transport_header(skb)[1] + 1) << 3)))) { in ipv6_destopt_rcv()
294 kfree_skb(skb); in ipv6_destopt_rcv()
298 extlen = (skb_transport_header(skb)[1] + 1) << 3; in ipv6_destopt_rcv()
302 opt->lastopt = opt->dst1 = skb_network_header_len(skb); in ipv6_destopt_rcv()
307 if (ip6_parse_tlv(tlvprocdestopt_lst, skb, in ipv6_destopt_rcv()
309 skb->transport_header += extlen; in ipv6_destopt_rcv()
310 opt = IP6CB(skb); in ipv6_destopt_rcv()
323 static void seg6_update_csum(struct sk_buff *skb) in seg6_update_csum() argument
333 hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb); in seg6_update_csum()
344 update_csum_diff4(skb, from, to); in seg6_update_csum()
348 update_csum_diff16(skb, (__be32 *)(&ipv6_hdr(skb)->daddr), in seg6_update_csum()
352 static int ipv6_srh_rcv(struct sk_buff *skb) in ipv6_srh_rcv() argument
354 struct inet6_skb_parm *opt = IP6CB(skb); in ipv6_srh_rcv()
355 struct net *net = dev_net(skb->dev); in ipv6_srh_rcv()
361 hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb); in ipv6_srh_rcv()
363 idev = __in6_dev_get(skb->dev); in ipv6_srh_rcv()
370 kfree_skb(skb); in ipv6_srh_rcv()
375 if (!seg6_hmac_validate_skb(skb)) { in ipv6_srh_rcv()
376 kfree_skb(skb); in ipv6_srh_rcv()
386 skb_postpull_rcsum(skb, skb_network_header(skb), in ipv6_srh_rcv()
387 skb_network_header_len(skb)); in ipv6_srh_rcv()
389 if (!pskb_pull(skb, offset)) { in ipv6_srh_rcv()
390 kfree_skb(skb); in ipv6_srh_rcv()
393 skb_postpull_rcsum(skb, skb_transport_header(skb), in ipv6_srh_rcv()
396 skb_reset_network_header(skb); in ipv6_srh_rcv()
397 skb_reset_transport_header(skb); in ipv6_srh_rcv()
398 skb->encapsulation = 0; in ipv6_srh_rcv()
400 __skb_tunnel_rx(skb, skb->dev, net); in ipv6_srh_rcv()
402 netif_rx(skb); in ipv6_srh_rcv()
406 opt->srcrt = skb_network_header_len(skb); in ipv6_srh_rcv()
408 skb->transport_header += (hdr->hdrlen + 1) << 3; in ipv6_srh_rcv()
409 opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb); in ipv6_srh_rcv()
416 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, in ipv6_srh_rcv()
418 skb_network_header(skb))); in ipv6_srh_rcv()
422 if (skb_cloned(skb)) { in ipv6_srh_rcv()
423 if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) { in ipv6_srh_rcv()
424 __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), in ipv6_srh_rcv()
426 kfree_skb(skb); in ipv6_srh_rcv()
431 hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb); in ipv6_srh_rcv()
436 skb_push(skb, sizeof(struct ipv6hdr)); in ipv6_srh_rcv()
438 if (skb->ip_summed == CHECKSUM_COMPLETE) in ipv6_srh_rcv()
439 seg6_update_csum(skb); in ipv6_srh_rcv()
441 ipv6_hdr(skb)->daddr = *addr; in ipv6_srh_rcv()
443 skb_dst_drop(skb); in ipv6_srh_rcv()
445 ip6_route_input(skb); in ipv6_srh_rcv()
447 if (skb_dst(skb)->error) { in ipv6_srh_rcv()
448 dst_input(skb); in ipv6_srh_rcv()
452 if (skb_dst(skb)->dev->flags & IFF_LOOPBACK) { in ipv6_srh_rcv()
453 if (ipv6_hdr(skb)->hop_limit <= 1) { in ipv6_srh_rcv()
455 icmpv6_send(skb, ICMPV6_TIME_EXCEED, in ipv6_srh_rcv()
457 kfree_skb(skb); in ipv6_srh_rcv()
460 ipv6_hdr(skb)->hop_limit--; in ipv6_srh_rcv()
462 skb_pull(skb, sizeof(struct ipv6hdr)); in ipv6_srh_rcv()
466 dst_input(skb); in ipv6_srh_rcv()
476 static int ipv6_rthdr_rcv(struct sk_buff *skb) in ipv6_rthdr_rcv() argument
478 struct inet6_dev *idev = __in6_dev_get(skb->dev); in ipv6_rthdr_rcv()
479 struct inet6_skb_parm *opt = IP6CB(skb); in ipv6_rthdr_rcv()
485 struct net *net = dev_net(skb->dev); in ipv6_rthdr_rcv()
488 idev = __in6_dev_get(skb->dev); in ipv6_rthdr_rcv()
492 if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) || in ipv6_rthdr_rcv()
493 !pskb_may_pull(skb, (skb_transport_offset(skb) + in ipv6_rthdr_rcv()
494 ((skb_transport_header(skb)[1] + 1) << 3)))) { in ipv6_rthdr_rcv()
496 kfree_skb(skb); in ipv6_rthdr_rcv()
500 hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb); in ipv6_rthdr_rcv()
502 if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) || in ipv6_rthdr_rcv()
503 skb->pkt_type != PACKET_HOST) { in ipv6_rthdr_rcv()
505 kfree_skb(skb); in ipv6_rthdr_rcv()
511 return ipv6_srh_rcv(skb); in ipv6_rthdr_rcv()
524 kfree_skb(skb); in ipv6_rthdr_rcv()
533 opt->lastopt = opt->srcrt = skb_network_header_len(skb); in ipv6_rthdr_rcv()
534 skb->transport_header += (hdr->hdrlen + 1) << 3; in ipv6_rthdr_rcv()
537 opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb); in ipv6_rthdr_rcv()
549 kfree_skb(skb); in ipv6_rthdr_rcv()
567 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, in ipv6_rthdr_rcv()
569 skb_network_header(skb))); in ipv6_rthdr_rcv()
576 if (skb_cloned(skb)) { in ipv6_rthdr_rcv()
578 if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) { in ipv6_rthdr_rcv()
579 __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), in ipv6_rthdr_rcv()
581 kfree_skb(skb); in ipv6_rthdr_rcv()
584 hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb); in ipv6_rthdr_rcv()
587 if (skb->ip_summed == CHECKSUM_COMPLETE) in ipv6_rthdr_rcv()
588 skb->ip_summed = CHECKSUM_NONE; in ipv6_rthdr_rcv()
599 if (xfrm6_input_addr(skb, (xfrm_address_t *)addr, in ipv6_rthdr_rcv()
600 (xfrm_address_t *)&ipv6_hdr(skb)->saddr, in ipv6_rthdr_rcv()
603 kfree_skb(skb); in ipv6_rthdr_rcv()
606 if (!ipv6_chk_home_addr(dev_net(skb_dst(skb)->dev), addr)) { in ipv6_rthdr_rcv()
608 kfree_skb(skb); in ipv6_rthdr_rcv()
619 kfree_skb(skb); in ipv6_rthdr_rcv()
624 *addr = ipv6_hdr(skb)->daddr; in ipv6_rthdr_rcv()
625 ipv6_hdr(skb)->daddr = daddr; in ipv6_rthdr_rcv()
627 skb_dst_drop(skb); in ipv6_rthdr_rcv()
628 ip6_route_input(skb); in ipv6_rthdr_rcv()
629 if (skb_dst(skb)->error) { in ipv6_rthdr_rcv()
630 skb_push(skb, skb->data - skb_network_header(skb)); in ipv6_rthdr_rcv()
631 dst_input(skb); in ipv6_rthdr_rcv()
635 if (skb_dst(skb)->dev->flags&IFF_LOOPBACK) { in ipv6_rthdr_rcv()
636 if (ipv6_hdr(skb)->hop_limit <= 1) { in ipv6_rthdr_rcv()
638 icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT, in ipv6_rthdr_rcv()
640 kfree_skb(skb); in ipv6_rthdr_rcv()
643 ipv6_hdr(skb)->hop_limit--; in ipv6_rthdr_rcv()
647 skb_push(skb, skb->data - skb_network_header(skb)); in ipv6_rthdr_rcv()
648 dst_input(skb); in ipv6_rthdr_rcv()
653 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, in ipv6_rthdr_rcv()
654 (&hdr->type) - skb_network_header(skb)); in ipv6_rthdr_rcv()
712 static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb) in ipv6_skb_idev() argument
714 return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev); in ipv6_skb_idev()
717 static inline struct net *ipv6_skb_net(struct sk_buff *skb) in ipv6_skb_net() argument
719 return skb_dst(skb) ? dev_net(skb_dst(skb)->dev) : dev_net(skb->dev); in ipv6_skb_net()
724 static bool ipv6_hop_ra(struct sk_buff *skb, int optoff) in ipv6_hop_ra() argument
726 const unsigned char *nh = skb_network_header(skb); in ipv6_hop_ra()
729 IP6CB(skb)->flags |= IP6SKB_ROUTERALERT; in ipv6_hop_ra()
730 memcpy(&IP6CB(skb)->ra, nh + optoff + 2, sizeof(IP6CB(skb)->ra)); in ipv6_hop_ra()
735 kfree_skb(skb); in ipv6_hop_ra()
741 static bool ipv6_hop_jumbo(struct sk_buff *skb, int optoff) in ipv6_hop_jumbo() argument
743 const unsigned char *nh = skb_network_header(skb); in ipv6_hop_jumbo()
744 struct inet6_dev *idev = __in6_dev_get_safely(skb->dev); in ipv6_hop_jumbo()
745 struct net *net = ipv6_skb_net(skb); in ipv6_hop_jumbo()
758 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff+2); in ipv6_hop_jumbo()
761 if (ipv6_hdr(skb)->payload_len) { in ipv6_hop_jumbo()
763 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff); in ipv6_hop_jumbo()
767 if (pkt_len > skb->len - sizeof(struct ipv6hdr)) { in ipv6_hop_jumbo()
772 if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr))) in ipv6_hop_jumbo()
775 IP6CB(skb)->flags |= IP6SKB_JUMBOGRAM; in ipv6_hop_jumbo()
779 kfree_skb(skb); in ipv6_hop_jumbo()
785 static bool ipv6_hop_calipso(struct sk_buff *skb, int optoff) in ipv6_hop_calipso() argument
787 const unsigned char *nh = skb_network_header(skb); in ipv6_hop_calipso()
795 if (!calipso_validate(skb, nh + optoff)) in ipv6_hop_calipso()
801 kfree_skb(skb); in ipv6_hop_calipso()
821 int ipv6_parse_hopopts(struct sk_buff *skb) in ipv6_parse_hopopts() argument
823 struct inet6_skb_parm *opt = IP6CB(skb); in ipv6_parse_hopopts()
824 struct net *net = dev_net(skb->dev); in ipv6_parse_hopopts()
833 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) || in ipv6_parse_hopopts()
834 !pskb_may_pull(skb, (sizeof(struct ipv6hdr) + in ipv6_parse_hopopts()
835 ((skb_transport_header(skb)[1] + 1) << 3)))) { in ipv6_parse_hopopts()
837 kfree_skb(skb); in ipv6_parse_hopopts()
841 extlen = (skb_transport_header(skb)[1] + 1) << 3; in ipv6_parse_hopopts()
846 if (ip6_parse_tlv(tlvprochopopt_lst, skb, in ipv6_parse_hopopts()
848 skb->transport_header += extlen; in ipv6_parse_hopopts()
849 opt = IP6CB(skb); in ipv6_parse_hopopts()
866 static void ipv6_push_rthdr0(struct sk_buff *skb, u8 *proto, in ipv6_push_rthdr0() argument
875 phdr = skb_push(skb, (ihdr->rt_hdr.hdrlen + 1) << 3); in ipv6_push_rthdr0()
891 static void ipv6_push_rthdr4(struct sk_buff *skb, u8 *proto, in ipv6_push_rthdr4() argument
901 sr_phdr = skb_push(skb, plen); in ipv6_push_rthdr4()
924 if (skb->dev) in ipv6_push_rthdr4()
925 net = dev_net(skb->dev); in ipv6_push_rthdr4()
926 else if (skb->sk) in ipv6_push_rthdr4()
927 net = sock_net(skb->sk); in ipv6_push_rthdr4()
940 static void ipv6_push_rthdr(struct sk_buff *skb, u8 *proto, in ipv6_push_rthdr() argument
948 ipv6_push_rthdr0(skb, proto, opt, addr_p, saddr); in ipv6_push_rthdr()
951 ipv6_push_rthdr4(skb, proto, opt, addr_p, saddr); in ipv6_push_rthdr()
958 static void ipv6_push_exthdr(struct sk_buff *skb, u8 *proto, u8 type, struct ipv6_opt_hdr *opt) in ipv6_push_exthdr() argument
960 struct ipv6_opt_hdr *h = skb_push(skb, ipv6_optlen(opt)); in ipv6_push_exthdr()
967 void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, in ipv6_push_nfrag_opts() argument
972 ipv6_push_rthdr(skb, proto, opt->srcrt, daddr, saddr); in ipv6_push_nfrag_opts()
978 ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt); in ipv6_push_nfrag_opts()
981 ipv6_push_exthdr(skb, proto, NEXTHDR_HOP, opt->hopopt); in ipv6_push_nfrag_opts()
984 void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, u8 *proto) in ipv6_push_frag_opts() argument
987 ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst1opt); in ipv6_push_frag_opts()