Lines Matching refs:skb
27 static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb);
28 static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
30 static int xfrm_skb_check_space(struct sk_buff *skb) in xfrm_skb_check_space() argument
32 struct dst_entry *dst = skb_dst(skb); in xfrm_skb_check_space()
34 - skb_headroom(skb); in xfrm_skb_check_space()
35 int ntail = dst->dev->needed_tailroom - skb_tailroom(skb); in xfrm_skb_check_space()
44 return pskb_expand_head(skb, nhead, ntail, GFP_ATOMIC); in xfrm_skb_check_space()
51 static struct dst_entry *skb_dst_pop(struct sk_buff *skb) in skb_dst_pop() argument
53 struct dst_entry *child = dst_clone(xfrm_dst_child(skb_dst(skb))); in skb_dst_pop()
55 skb_dst_drop(skb); in skb_dst_pop()
64 static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_transport_output() argument
66 struct iphdr *iph = ip_hdr(skb); in xfrm4_transport_output()
69 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm4_transport_output()
71 skb_set_network_header(skb, -x->props.header_len); in xfrm4_transport_output()
72 skb->mac_header = skb->network_header + in xfrm4_transport_output()
74 skb->transport_header = skb->network_header + ihl; in xfrm4_transport_output()
75 __skb_pull(skb, ihl); in xfrm4_transport_output()
76 memmove(skb_network_header(skb), iph, ihl); in xfrm4_transport_output()
81 static int mip6_rthdr_offset(struct sk_buff *skb, u8 **nexthdr, int type) in mip6_rthdr_offset() argument
83 const unsigned char *nh = skb_network_header(skb); in mip6_rthdr_offset()
88 packet_len = skb_tail_pointer(skb) - nh; in mip6_rthdr_offset()
89 *nexthdr = &ipv6_hdr(skb)->nexthdr; in mip6_rthdr_offset()
112 if (ipv6_find_tlv(skb, offset, IPV6_TLV_HAO) >= 0) { in mip6_rthdr_offset()
128 exthdr = (struct ipv6_opt_hdr *)(skb_network_header(skb) + in mip6_rthdr_offset()
141 static int xfrm6_hdr_offset(struct xfrm_state *x, struct sk_buff *skb, u8 **prevhdr) in xfrm6_hdr_offset() argument
147 return mip6_rthdr_offset(skb, prevhdr, x->type->proto); in xfrm6_hdr_offset()
153 return ip6_find_1stfragopt(skb, prevhdr); in xfrm6_hdr_offset()
162 static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_transport_output() argument
169 iph = ipv6_hdr(skb); in xfrm6_transport_output()
170 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm6_transport_output()
172 hdr_len = xfrm6_hdr_offset(x, skb, &prevhdr); in xfrm6_transport_output()
175 skb_set_mac_header(skb, in xfrm6_transport_output()
176 (prevhdr - x->props.header_len) - skb->data); in xfrm6_transport_output()
177 skb_set_network_header(skb, -x->props.header_len); in xfrm6_transport_output()
178 skb->transport_header = skb->network_header + hdr_len; in xfrm6_transport_output()
179 __skb_pull(skb, hdr_len); in xfrm6_transport_output()
180 memmove(ipv6_hdr(skb), iph, hdr_len); in xfrm6_transport_output()
193 static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_ro_output() argument
200 iph = ipv6_hdr(skb); in xfrm6_ro_output()
202 hdr_len = xfrm6_hdr_offset(x, skb, &prevhdr); in xfrm6_ro_output()
205 skb_set_mac_header(skb, in xfrm6_ro_output()
206 (prevhdr - x->props.header_len) - skb->data); in xfrm6_ro_output()
207 skb_set_network_header(skb, -x->props.header_len); in xfrm6_ro_output()
208 skb->transport_header = skb->network_header + hdr_len; in xfrm6_ro_output()
209 __skb_pull(skb, hdr_len); in xfrm6_ro_output()
210 memmove(ipv6_hdr(skb), iph, hdr_len); in xfrm6_ro_output()
225 static int xfrm4_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_beet_encap_add() argument
232 optlen = XFRM_MODE_SKB_CB(skb)->optlen; in xfrm4_beet_encap_add()
236 skb_set_network_header(skb, -x->props.header_len - hdrlen + in xfrm4_beet_encap_add()
237 (XFRM_MODE_SKB_CB(skb)->ihl - sizeof(*top_iph))); in xfrm4_beet_encap_add()
239 skb->network_header += IPV4_BEET_PHMAXLEN; in xfrm4_beet_encap_add()
240 skb->mac_header = skb->network_header + in xfrm4_beet_encap_add()
242 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm4_beet_encap_add()
244 xfrm4_beet_make_header(skb); in xfrm4_beet_encap_add()
246 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdrlen); in xfrm4_beet_encap_add()
248 top_iph = ip_hdr(skb); in xfrm4_beet_encap_add()
274 static int xfrm4_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_tunnel_encap_add() argument
276 bool small_ipv6 = (skb->protocol == htons(ETH_P_IPV6)) && (skb->len <= IPV6_MIN_MTU); in xfrm4_tunnel_encap_add()
277 struct dst_entry *dst = skb_dst(skb); in xfrm4_tunnel_encap_add()
281 skb_set_inner_network_header(skb, skb_network_offset(skb)); in xfrm4_tunnel_encap_add()
282 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm4_tunnel_encap_add()
284 skb_set_network_header(skb, -x->props.header_len); in xfrm4_tunnel_encap_add()
285 skb->mac_header = skb->network_header + in xfrm4_tunnel_encap_add()
287 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm4_tunnel_encap_add()
288 top_iph = ip_hdr(skb); in xfrm4_tunnel_encap_add()
293 top_iph->protocol = xfrm_af2proto(skb_dst(skb)->ops->family); in xfrm4_tunnel_encap_add()
299 top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos; in xfrm4_tunnel_encap_add()
301 XFRM_MODE_SKB_CB(skb)->tos); in xfrm4_tunnel_encap_add()
308 0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF)); in xfrm4_tunnel_encap_add()
314 ip_select_ident(dev_net(dst->dev), skb, NULL); in xfrm4_tunnel_encap_add()
320 static int xfrm6_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_tunnel_encap_add() argument
322 struct dst_entry *dst = skb_dst(skb); in xfrm6_tunnel_encap_add()
326 skb_set_inner_network_header(skb, skb_network_offset(skb)); in xfrm6_tunnel_encap_add()
327 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm6_tunnel_encap_add()
329 skb_set_network_header(skb, -x->props.header_len); in xfrm6_tunnel_encap_add()
330 skb->mac_header = skb->network_header + in xfrm6_tunnel_encap_add()
332 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm6_tunnel_encap_add()
333 top_iph = ipv6_hdr(skb); in xfrm6_tunnel_encap_add()
337 memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, in xfrm6_tunnel_encap_add()
339 top_iph->nexthdr = xfrm_af2proto(skb_dst(skb)->ops->family); in xfrm6_tunnel_encap_add()
344 dsfield = XFRM_MODE_SKB_CB(skb)->tos; in xfrm6_tunnel_encap_add()
345 dsfield = INET_ECN_encapsulate(dsfield, XFRM_MODE_SKB_CB(skb)->tos); in xfrm6_tunnel_encap_add()
355 static int xfrm6_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_beet_encap_add() argument
362 optlen = XFRM_MODE_SKB_CB(skb)->optlen; in xfrm6_beet_encap_add()
366 skb_set_network_header(skb, -x->props.header_len - hdr_len); in xfrm6_beet_encap_add()
368 skb->network_header += IPV4_BEET_PHMAXLEN; in xfrm6_beet_encap_add()
369 skb->mac_header = skb->network_header + in xfrm6_beet_encap_add()
371 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm6_beet_encap_add()
372 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdr_len); in xfrm6_beet_encap_add()
374 xfrm6_beet_make_header(skb); in xfrm6_beet_encap_add()
376 top_iph = ipv6_hdr(skb); in xfrm6_beet_encap_add()
406 static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_prepare_output() argument
410 err = xfrm_inner_extract_output(x, skb); in xfrm4_prepare_output()
414 IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE; in xfrm4_prepare_output()
415 skb->protocol = htons(ETH_P_IP); in xfrm4_prepare_output()
419 return xfrm4_beet_encap_add(x, skb); in xfrm4_prepare_output()
421 return xfrm4_tunnel_encap_add(x, skb); in xfrm4_prepare_output()
428 static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_prepare_output() argument
433 err = xfrm_inner_extract_output(x, skb); in xfrm6_prepare_output()
437 skb->ignore_df = 1; in xfrm6_prepare_output()
438 skb->protocol = htons(ETH_P_IPV6); in xfrm6_prepare_output()
442 return xfrm6_beet_encap_add(x, skb); in xfrm6_prepare_output()
444 return xfrm6_tunnel_encap_add(x, skb); in xfrm6_prepare_output()
454 static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm_outer_mode_output() argument
460 return xfrm4_prepare_output(x, skb); in xfrm_outer_mode_output()
462 return xfrm6_prepare_output(x, skb); in xfrm_outer_mode_output()
466 return xfrm4_transport_output(x, skb); in xfrm_outer_mode_output()
468 return xfrm6_transport_output(x, skb); in xfrm_outer_mode_output()
472 return xfrm6_ro_output(x, skb); in xfrm_outer_mode_output()
483 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb) in pktgen_xfrm_outer_mode_output() argument
485 return xfrm_outer_mode_output(x, skb); in pktgen_xfrm_outer_mode_output()
489 static int xfrm_output_one(struct sk_buff *skb, int err) in xfrm_output_one() argument
491 struct dst_entry *dst = skb_dst(skb); in xfrm_output_one()
499 err = xfrm_skb_check_space(skb); in xfrm_output_one()
505 skb->mark = xfrm_smark_get(skb->mark, x); in xfrm_output_one()
507 err = xfrm_outer_mode_output(x, skb); in xfrm_output_one()
527 err = xfrm_replay_overflow(x, skb); in xfrm_output_one()
533 x->curlft.bytes += skb->len; in xfrm_output_one()
538 skb_dst_force(skb); in xfrm_output_one()
539 if (!skb_dst(skb)) { in xfrm_output_one()
545 if (xfrm_offload(skb)) { in xfrm_output_one()
546 x->type_offload->encap(x, skb); in xfrm_output_one()
549 skb->encapsulation = 0; in xfrm_output_one()
551 err = x->type->output(x, skb); in xfrm_output_one()
562 dst = skb_dst_pop(skb); in xfrm_output_one()
568 skb_dst_set(skb, dst); in xfrm_output_one()
577 kfree_skb(skb); in xfrm_output_one()
582 int xfrm_output_resume(struct sk_buff *skb, int err) in xfrm_output_resume() argument
584 struct net *net = xs_net(skb_dst(skb)->xfrm); in xfrm_output_resume()
586 while (likely((err = xfrm_output_one(skb, err)) == 0)) { in xfrm_output_resume()
587 nf_reset_ct(skb); in xfrm_output_resume()
589 err = skb_dst(skb)->ops->local_out(net, skb->sk, skb); in xfrm_output_resume()
593 if (!skb_dst(skb)->xfrm) in xfrm_output_resume()
594 return dst_output(net, skb->sk, skb); in xfrm_output_resume()
596 err = nf_hook(skb_dst(skb)->ops->family, in xfrm_output_resume()
597 NF_INET_POST_ROUTING, net, skb->sk, skb, in xfrm_output_resume()
598 NULL, skb_dst(skb)->dev, xfrm_output2); in xfrm_output_resume()
611 static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb) in xfrm_output2() argument
613 return xfrm_output_resume(skb, 1); in xfrm_output2()
616 static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb) in xfrm_output_gso() argument
620 BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_GSO_CB_OFFSET); in xfrm_output_gso()
621 BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_GSO_CB_OFFSET); in xfrm_output_gso()
622 segs = skb_gso_segment(skb, 0); in xfrm_output_gso()
623 kfree_skb(skb); in xfrm_output_gso()
654 static void xfrm_get_inner_ipproto(struct sk_buff *skb, struct xfrm_state *x) in xfrm_get_inner_ipproto() argument
656 struct xfrm_offload *xo = xfrm_offload(skb); in xfrm_get_inner_ipproto()
665 xo->inner_ipproto = ip_hdr(skb)->protocol; in xfrm_get_inner_ipproto()
668 xo->inner_ipproto = ipv6_hdr(skb)->nexthdr; in xfrm_get_inner_ipproto()
678 if (!skb->encapsulation) in xfrm_get_inner_ipproto()
681 if (skb->inner_protocol_type == ENCAP_TYPE_IPPROTO) { in xfrm_get_inner_ipproto()
682 xo->inner_ipproto = skb->inner_ipproto; in xfrm_get_inner_ipproto()
686 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER) in xfrm_get_inner_ipproto()
689 eth = (struct ethhdr *)skb_inner_mac_header(skb); in xfrm_get_inner_ipproto()
693 xo->inner_ipproto = inner_ipv6_hdr(skb)->nexthdr; in xfrm_get_inner_ipproto()
696 xo->inner_ipproto = inner_ip_hdr(skb)->protocol; in xfrm_get_inner_ipproto()
701 int xfrm_output(struct sock *sk, struct sk_buff *skb) in xfrm_output() argument
703 struct net *net = dev_net(skb_dst(skb)->dev); in xfrm_output()
704 struct xfrm_state *x = skb_dst(skb)->xfrm; in xfrm_output()
709 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); in xfrm_output()
710 IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED; in xfrm_output()
713 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); in xfrm_output()
715 IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED; in xfrm_output()
719 secpath_reset(skb); in xfrm_output()
721 if (xfrm_dev_offload_ok(skb, x)) { in xfrm_output()
724 sp = secpath_set(skb); in xfrm_output()
727 kfree_skb(skb); in xfrm_output()
735 xfrm_get_inner_ipproto(skb, x); in xfrm_output()
736 skb->encapsulation = 1; in xfrm_output()
738 if (skb_is_gso(skb)) { in xfrm_output()
739 if (skb->inner_protocol) in xfrm_output()
740 return xfrm_output_gso(net, sk, skb); in xfrm_output()
742 skb_shinfo(skb)->gso_type |= SKB_GSO_ESP; in xfrm_output()
749 if (skb_is_gso(skb)) in xfrm_output()
750 return xfrm_output_gso(net, sk, skb); in xfrm_output()
753 if (skb->ip_summed == CHECKSUM_PARTIAL) { in xfrm_output()
754 err = skb_checksum_help(skb); in xfrm_output()
757 kfree_skb(skb); in xfrm_output()
763 return xfrm_output2(net, sk, skb); in xfrm_output()
767 static int xfrm4_tunnel_check_size(struct sk_buff *skb) in xfrm4_tunnel_check_size() argument
771 if (IPCB(skb)->flags & IPSKB_XFRM_TUNNEL_SIZE) in xfrm4_tunnel_check_size()
774 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)) || skb->ignore_df) in xfrm4_tunnel_check_size()
777 mtu = dst_mtu(skb_dst(skb)); in xfrm4_tunnel_check_size()
778 if ((!skb_is_gso(skb) && skb->len > mtu) || in xfrm4_tunnel_check_size()
779 (skb_is_gso(skb) && in xfrm4_tunnel_check_size()
780 !skb_gso_validate_network_len(skb, ip_skb_dst_mtu(skb->sk, skb)))) { in xfrm4_tunnel_check_size()
781 skb->protocol = htons(ETH_P_IP); in xfrm4_tunnel_check_size()
783 if (skb->sk) in xfrm4_tunnel_check_size()
784 xfrm_local_error(skb, mtu); in xfrm4_tunnel_check_size()
786 icmp_send(skb, ICMP_DEST_UNREACH, in xfrm4_tunnel_check_size()
794 static int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_extract_output() argument
799 ip_is_fragment(ip_hdr(skb))) { in xfrm4_extract_output()
804 err = xfrm4_tunnel_check_size(skb); in xfrm4_extract_output()
808 XFRM_MODE_SKB_CB(skb)->protocol = ip_hdr(skb)->protocol; in xfrm4_extract_output()
810 xfrm4_extract_header(skb); in xfrm4_extract_output()
815 static int xfrm6_tunnel_check_size(struct sk_buff *skb) in xfrm6_tunnel_check_size() argument
818 struct dst_entry *dst = skb_dst(skb); in xfrm6_tunnel_check_size()
820 if (skb->ignore_df) in xfrm6_tunnel_check_size()
827 if ((!skb_is_gso(skb) && skb->len > mtu) || in xfrm6_tunnel_check_size()
828 (skb_is_gso(skb) && in xfrm6_tunnel_check_size()
829 !skb_gso_validate_network_len(skb, ip6_skb_dst_mtu(skb)))) { in xfrm6_tunnel_check_size()
830 skb->dev = dst->dev; in xfrm6_tunnel_check_size()
831 skb->protocol = htons(ETH_P_IPV6); in xfrm6_tunnel_check_size()
833 if (xfrm6_local_dontfrag(skb->sk)) in xfrm6_tunnel_check_size()
834 ipv6_stub->xfrm6_local_rxpmtu(skb, mtu); in xfrm6_tunnel_check_size()
835 else if (skb->sk) in xfrm6_tunnel_check_size()
836 xfrm_local_error(skb, mtu); in xfrm6_tunnel_check_size()
838 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); in xfrm6_tunnel_check_size()
846 static int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_extract_output() argument
851 err = xfrm6_tunnel_check_size(skb); in xfrm6_extract_output()
855 XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr; in xfrm6_extract_output()
857 xfrm6_extract_header(skb); in xfrm6_extract_output()
865 static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm_inner_extract_output() argument
871 xfrm_af2proto(skb_dst(skb)->ops->family)); in xfrm_inner_extract_output()
880 return xfrm4_extract_output(x, skb); in xfrm_inner_extract_output()
882 return xfrm6_extract_output(x, skb); in xfrm_inner_extract_output()
888 void xfrm_local_error(struct sk_buff *skb, int mtu) in xfrm_local_error() argument
893 if (skb->protocol == htons(ETH_P_IP)) in xfrm_local_error()
895 else if (skb->protocol == htons(ETH_P_IPV6) && in xfrm_local_error()
896 skb->sk->sk_family == AF_INET6) in xfrm_local_error()
903 afinfo->local_error(skb, mtu); in xfrm_local_error()