Lines Matching refs:skb
28 static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb);
29 static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
31 static int xfrm_skb_check_space(struct sk_buff *skb) in xfrm_skb_check_space() argument
33 struct dst_entry *dst = skb_dst(skb); in xfrm_skb_check_space()
35 - skb_headroom(skb); in xfrm_skb_check_space()
36 int ntail = dst->dev->needed_tailroom - skb_tailroom(skb); in xfrm_skb_check_space()
45 return pskb_expand_head(skb, nhead, ntail, GFP_ATOMIC); in xfrm_skb_check_space()
52 static struct dst_entry *skb_dst_pop(struct sk_buff *skb) in skb_dst_pop() argument
54 struct dst_entry *child = dst_clone(xfrm_dst_child(skb_dst(skb))); in skb_dst_pop()
56 skb_dst_drop(skb); in skb_dst_pop()
65 static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_transport_output() argument
67 struct iphdr *iph = ip_hdr(skb); in xfrm4_transport_output()
70 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm4_transport_output()
72 skb_set_network_header(skb, -x->props.header_len); in xfrm4_transport_output()
73 skb->mac_header = skb->network_header + in xfrm4_transport_output()
75 skb->transport_header = skb->network_header + ihl; in xfrm4_transport_output()
76 __skb_pull(skb, ihl); in xfrm4_transport_output()
77 memmove(skb_network_header(skb), iph, ihl); in xfrm4_transport_output()
82 static int mip6_rthdr_offset(struct sk_buff *skb, u8 **nexthdr, int type) in mip6_rthdr_offset() argument
84 const unsigned char *nh = skb_network_header(skb); in mip6_rthdr_offset()
89 packet_len = skb_tail_pointer(skb) - nh; in mip6_rthdr_offset()
90 *nexthdr = &ipv6_hdr(skb)->nexthdr; in mip6_rthdr_offset()
113 if (ipv6_find_tlv(skb, offset, IPV6_TLV_HAO) >= 0) { in mip6_rthdr_offset()
129 exthdr = (struct ipv6_opt_hdr *)(skb_network_header(skb) + in mip6_rthdr_offset()
142 static int xfrm6_hdr_offset(struct xfrm_state *x, struct sk_buff *skb, u8 **prevhdr) in xfrm6_hdr_offset() argument
148 return mip6_rthdr_offset(skb, prevhdr, x->type->proto); in xfrm6_hdr_offset()
154 return ip6_find_1stfragopt(skb, prevhdr); in xfrm6_hdr_offset()
163 static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_transport_output() argument
170 iph = ipv6_hdr(skb); in xfrm6_transport_output()
171 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm6_transport_output()
173 hdr_len = xfrm6_hdr_offset(x, skb, &prevhdr); in xfrm6_transport_output()
176 skb_set_mac_header(skb, in xfrm6_transport_output()
177 (prevhdr - x->props.header_len) - skb->data); in xfrm6_transport_output()
178 skb_set_network_header(skb, -x->props.header_len); in xfrm6_transport_output()
179 skb->transport_header = skb->network_header + hdr_len; in xfrm6_transport_output()
180 __skb_pull(skb, hdr_len); in xfrm6_transport_output()
181 memmove(ipv6_hdr(skb), iph, hdr_len); in xfrm6_transport_output()
194 static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_ro_output() argument
201 iph = ipv6_hdr(skb); in xfrm6_ro_output()
203 hdr_len = xfrm6_hdr_offset(x, skb, &prevhdr); in xfrm6_ro_output()
206 skb_set_mac_header(skb, in xfrm6_ro_output()
207 (prevhdr - x->props.header_len) - skb->data); in xfrm6_ro_output()
208 skb_set_network_header(skb, -x->props.header_len); in xfrm6_ro_output()
209 skb->transport_header = skb->network_header + hdr_len; in xfrm6_ro_output()
210 __skb_pull(skb, hdr_len); in xfrm6_ro_output()
211 memmove(ipv6_hdr(skb), iph, hdr_len); in xfrm6_ro_output()
224 static int xfrm4_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_beet_encap_add() argument
231 optlen = XFRM_MODE_SKB_CB(skb)->optlen; in xfrm4_beet_encap_add()
235 skb_set_network_header(skb, -x->props.header_len - hdrlen + in xfrm4_beet_encap_add()
236 (XFRM_MODE_SKB_CB(skb)->ihl - sizeof(*top_iph))); in xfrm4_beet_encap_add()
238 skb->network_header += IPV4_BEET_PHMAXLEN; in xfrm4_beet_encap_add()
239 skb->mac_header = skb->network_header + in xfrm4_beet_encap_add()
241 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm4_beet_encap_add()
243 xfrm4_beet_make_header(skb); in xfrm4_beet_encap_add()
245 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdrlen); in xfrm4_beet_encap_add()
247 top_iph = ip_hdr(skb); in xfrm4_beet_encap_add()
273 static int xfrm4_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_tunnel_encap_add() argument
275 bool small_ipv6 = (skb->protocol == htons(ETH_P_IPV6)) && (skb->len <= IPV6_MIN_MTU); in xfrm4_tunnel_encap_add()
276 struct dst_entry *dst = skb_dst(skb); in xfrm4_tunnel_encap_add()
280 skb_set_inner_network_header(skb, skb_network_offset(skb)); in xfrm4_tunnel_encap_add()
281 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm4_tunnel_encap_add()
283 skb_set_network_header(skb, -x->props.header_len); in xfrm4_tunnel_encap_add()
284 skb->mac_header = skb->network_header + in xfrm4_tunnel_encap_add()
286 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm4_tunnel_encap_add()
287 top_iph = ip_hdr(skb); in xfrm4_tunnel_encap_add()
292 top_iph->protocol = xfrm_af2proto(skb_dst(skb)->ops->family); in xfrm4_tunnel_encap_add()
298 top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos; in xfrm4_tunnel_encap_add()
300 XFRM_MODE_SKB_CB(skb)->tos); in xfrm4_tunnel_encap_add()
307 0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF)); in xfrm4_tunnel_encap_add()
313 ip_select_ident(dev_net(dst->dev), skb, NULL); in xfrm4_tunnel_encap_add()
319 static int xfrm6_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_tunnel_encap_add() argument
321 struct dst_entry *dst = skb_dst(skb); in xfrm6_tunnel_encap_add()
325 skb_set_inner_network_header(skb, skb_network_offset(skb)); in xfrm6_tunnel_encap_add()
326 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm6_tunnel_encap_add()
328 skb_set_network_header(skb, -x->props.header_len); in xfrm6_tunnel_encap_add()
329 skb->mac_header = skb->network_header + in xfrm6_tunnel_encap_add()
331 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm6_tunnel_encap_add()
332 top_iph = ipv6_hdr(skb); in xfrm6_tunnel_encap_add()
336 memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, in xfrm6_tunnel_encap_add()
338 top_iph->nexthdr = xfrm_af2proto(skb_dst(skb)->ops->family); in xfrm6_tunnel_encap_add()
343 dsfield = XFRM_MODE_SKB_CB(skb)->tos; in xfrm6_tunnel_encap_add()
344 dsfield = INET_ECN_encapsulate(dsfield, XFRM_MODE_SKB_CB(skb)->tos); in xfrm6_tunnel_encap_add()
354 static int xfrm6_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_beet_encap_add() argument
361 optlen = XFRM_MODE_SKB_CB(skb)->optlen; in xfrm6_beet_encap_add()
365 skb_set_network_header(skb, -x->props.header_len - hdr_len); in xfrm6_beet_encap_add()
367 skb->network_header += IPV4_BEET_PHMAXLEN; in xfrm6_beet_encap_add()
368 skb->mac_header = skb->network_header + in xfrm6_beet_encap_add()
370 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm6_beet_encap_add()
371 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdr_len); in xfrm6_beet_encap_add()
373 xfrm6_beet_make_header(skb); in xfrm6_beet_encap_add()
375 top_iph = ipv6_hdr(skb); in xfrm6_beet_encap_add()
405 static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_prepare_output() argument
409 err = xfrm_inner_extract_output(x, skb); in xfrm4_prepare_output()
413 IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE; in xfrm4_prepare_output()
414 skb->protocol = htons(ETH_P_IP); in xfrm4_prepare_output()
418 return xfrm4_beet_encap_add(x, skb); in xfrm4_prepare_output()
420 return xfrm4_tunnel_encap_add(x, skb); in xfrm4_prepare_output()
427 static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_prepare_output() argument
432 err = xfrm_inner_extract_output(x, skb); in xfrm6_prepare_output()
436 skb->ignore_df = 1; in xfrm6_prepare_output()
437 skb->protocol = htons(ETH_P_IPV6); in xfrm6_prepare_output()
441 return xfrm6_beet_encap_add(x, skb); in xfrm6_prepare_output()
443 return xfrm6_tunnel_encap_add(x, skb); in xfrm6_prepare_output()
453 static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm_outer_mode_output() argument
459 return xfrm4_prepare_output(x, skb); in xfrm_outer_mode_output()
461 return xfrm6_prepare_output(x, skb); in xfrm_outer_mode_output()
465 return xfrm4_transport_output(x, skb); in xfrm_outer_mode_output()
467 return xfrm6_transport_output(x, skb); in xfrm_outer_mode_output()
471 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()
490 static int xfrm_output_one(struct sk_buff *skb, int err) in xfrm_output_one() argument
492 struct dst_entry *dst = skb_dst(skb); in xfrm_output_one()
500 err = xfrm_skb_check_space(skb); in xfrm_output_one()
506 skb->mark = xfrm_smark_get(skb->mark, x); in xfrm_output_one()
508 err = xfrm_outer_mode_output(x, skb); in xfrm_output_one()
528 err = xfrm_replay_overflow(x, skb); in xfrm_output_one()
534 x->curlft.bytes += skb->len; in xfrm_output_one()
540 skb_dst_force(skb); in xfrm_output_one()
541 if (!skb_dst(skb)) { in xfrm_output_one()
547 if (xfrm_offload(skb)) { in xfrm_output_one()
548 x->type_offload->encap(x, skb); in xfrm_output_one()
551 skb->encapsulation = 0; in xfrm_output_one()
553 err = x->type->output(x, skb); in xfrm_output_one()
564 dst = skb_dst_pop(skb); in xfrm_output_one()
570 skb_dst_set(skb, dst); in xfrm_output_one()
579 kfree_skb(skb); in xfrm_output_one()
584 int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err) in xfrm_output_resume() argument
586 struct net *net = xs_net(skb_dst(skb)->xfrm); in xfrm_output_resume()
588 while (likely((err = xfrm_output_one(skb, err)) == 0)) { in xfrm_output_resume()
589 nf_reset_ct(skb); in xfrm_output_resume()
591 err = skb_dst(skb)->ops->local_out(net, sk, skb); in xfrm_output_resume()
595 if (!skb_dst(skb)->xfrm) in xfrm_output_resume()
596 return dst_output(net, sk, skb); in xfrm_output_resume()
598 err = nf_hook(skb_dst(skb)->ops->family, in xfrm_output_resume()
599 NF_INET_POST_ROUTING, net, sk, skb, in xfrm_output_resume()
600 NULL, skb_dst(skb)->dev, xfrm_output2); in xfrm_output_resume()
613 static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb) in xfrm_output2() argument
615 return xfrm_output_resume(sk, skb, 1); in xfrm_output2()
618 static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb) in xfrm_output_gso() argument
622 BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_GSO_CB_OFFSET); in xfrm_output_gso()
623 BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_GSO_CB_OFFSET); in xfrm_output_gso()
624 segs = skb_gso_segment(skb, 0); in xfrm_output_gso()
625 kfree_skb(skb); in xfrm_output_gso()
656 static void xfrm_get_inner_ipproto(struct sk_buff *skb, struct xfrm_state *x) in xfrm_get_inner_ipproto() argument
658 struct xfrm_offload *xo = xfrm_offload(skb); in xfrm_get_inner_ipproto()
667 xo->inner_ipproto = ip_hdr(skb)->protocol; in xfrm_get_inner_ipproto()
670 xo->inner_ipproto = ipv6_hdr(skb)->nexthdr; in xfrm_get_inner_ipproto()
680 if (!skb->encapsulation) in xfrm_get_inner_ipproto()
683 if (skb->inner_protocol_type == ENCAP_TYPE_IPPROTO) { in xfrm_get_inner_ipproto()
684 xo->inner_ipproto = skb->inner_ipproto; in xfrm_get_inner_ipproto()
688 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER) in xfrm_get_inner_ipproto()
691 eth = (struct ethhdr *)skb_inner_mac_header(skb); in xfrm_get_inner_ipproto()
695 xo->inner_ipproto = inner_ipv6_hdr(skb)->nexthdr; in xfrm_get_inner_ipproto()
698 xo->inner_ipproto = inner_ip_hdr(skb)->protocol; in xfrm_get_inner_ipproto()
703 int xfrm_output(struct sock *sk, struct sk_buff *skb) in xfrm_output() argument
705 struct net *net = dev_net(skb_dst(skb)->dev); in xfrm_output()
706 struct xfrm_state *x = skb_dst(skb)->xfrm; in xfrm_output()
711 : skb_dst(skb)->ops->family; in xfrm_output()
715 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); in xfrm_output()
716 IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED; in xfrm_output()
719 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); in xfrm_output()
721 IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED; in xfrm_output()
726 if (!xfrm_dev_offload_ok(skb, x)) { in xfrm_output()
728 kfree_skb(skb); in xfrm_output()
732 return xfrm_output_resume(sk, skb, 0); in xfrm_output()
735 secpath_reset(skb); in xfrm_output()
737 if (xfrm_dev_offload_ok(skb, x)) { in xfrm_output()
740 sp = secpath_set(skb); in xfrm_output()
743 kfree_skb(skb); in xfrm_output()
751 xfrm_get_inner_ipproto(skb, x); in xfrm_output()
752 skb->encapsulation = 1; in xfrm_output()
754 if (skb_is_gso(skb)) { in xfrm_output()
755 if (skb->inner_protocol) in xfrm_output()
756 return xfrm_output_gso(net, sk, skb); in xfrm_output()
758 skb_shinfo(skb)->gso_type |= SKB_GSO_ESP; in xfrm_output()
765 if (skb_is_gso(skb)) in xfrm_output()
766 return xfrm_output_gso(net, sk, skb); in xfrm_output()
769 if (skb->ip_summed == CHECKSUM_PARTIAL) { in xfrm_output()
770 err = skb_checksum_help(skb); in xfrm_output()
773 kfree_skb(skb); in xfrm_output()
779 return xfrm_output2(net, sk, skb); in xfrm_output()
783 static int xfrm4_tunnel_check_size(struct sk_buff *skb) in xfrm4_tunnel_check_size() argument
787 if (IPCB(skb)->flags & IPSKB_XFRM_TUNNEL_SIZE) in xfrm4_tunnel_check_size()
790 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)) || skb->ignore_df) in xfrm4_tunnel_check_size()
793 mtu = dst_mtu(skb_dst(skb)); in xfrm4_tunnel_check_size()
794 if ((!skb_is_gso(skb) && skb->len > mtu) || in xfrm4_tunnel_check_size()
795 (skb_is_gso(skb) && in xfrm4_tunnel_check_size()
796 !skb_gso_validate_network_len(skb, ip_skb_dst_mtu(skb->sk, skb)))) { in xfrm4_tunnel_check_size()
797 skb->protocol = htons(ETH_P_IP); in xfrm4_tunnel_check_size()
799 if (skb->sk) in xfrm4_tunnel_check_size()
800 xfrm_local_error(skb, mtu); in xfrm4_tunnel_check_size()
802 icmp_send(skb, ICMP_DEST_UNREACH, in xfrm4_tunnel_check_size()
810 static int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_extract_output() argument
815 ip_is_fragment(ip_hdr(skb))) { in xfrm4_extract_output()
820 err = xfrm4_tunnel_check_size(skb); in xfrm4_extract_output()
824 XFRM_MODE_SKB_CB(skb)->protocol = ip_hdr(skb)->protocol; in xfrm4_extract_output()
826 xfrm4_extract_header(skb); in xfrm4_extract_output()
831 static int xfrm6_tunnel_check_size(struct sk_buff *skb) in xfrm6_tunnel_check_size() argument
834 struct dst_entry *dst = skb_dst(skb); in xfrm6_tunnel_check_size()
836 if (skb->ignore_df) in xfrm6_tunnel_check_size()
843 if ((!skb_is_gso(skb) && skb->len > mtu) || in xfrm6_tunnel_check_size()
844 (skb_is_gso(skb) && in xfrm6_tunnel_check_size()
845 !skb_gso_validate_network_len(skb, ip6_skb_dst_mtu(skb)))) { in xfrm6_tunnel_check_size()
846 skb->dev = dst->dev; in xfrm6_tunnel_check_size()
847 skb->protocol = htons(ETH_P_IPV6); in xfrm6_tunnel_check_size()
849 if (xfrm6_local_dontfrag(skb->sk)) in xfrm6_tunnel_check_size()
850 ipv6_stub->xfrm6_local_rxpmtu(skb, mtu); in xfrm6_tunnel_check_size()
851 else if (skb->sk) in xfrm6_tunnel_check_size()
852 xfrm_local_error(skb, mtu); in xfrm6_tunnel_check_size()
854 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); in xfrm6_tunnel_check_size()
862 static int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_extract_output() argument
867 err = xfrm6_tunnel_check_size(skb); in xfrm6_extract_output()
871 XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr; in xfrm6_extract_output()
873 xfrm6_extract_header(skb); in xfrm6_extract_output()
881 static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm_inner_extract_output() argument
883 switch (skb->protocol) { in xfrm_inner_extract_output()
885 return xfrm4_extract_output(x, skb); in xfrm_inner_extract_output()
887 return xfrm6_extract_output(x, skb); in xfrm_inner_extract_output()
893 void xfrm_local_error(struct sk_buff *skb, int mtu) in xfrm_local_error() argument
898 if (skb->protocol == htons(ETH_P_IP)) in xfrm_local_error()
900 else if (skb->protocol == htons(ETH_P_IPV6) && in xfrm_local_error()
901 skb->sk->sk_family == AF_INET6) in xfrm_local_error()
908 afinfo->local_error(skb, mtu); in xfrm_local_error()