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()
85 static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_transport_output() argument
92 iph = ipv6_hdr(skb); in xfrm6_transport_output()
93 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm6_transport_output()
95 hdr_len = x->type->hdr_offset(x, skb, &prevhdr); in xfrm6_transport_output()
98 skb_set_mac_header(skb, in xfrm6_transport_output()
99 (prevhdr - x->props.header_len) - skb->data); in xfrm6_transport_output()
100 skb_set_network_header(skb, -x->props.header_len); in xfrm6_transport_output()
101 skb->transport_header = skb->network_header + hdr_len; in xfrm6_transport_output()
102 __skb_pull(skb, hdr_len); in xfrm6_transport_output()
103 memmove(ipv6_hdr(skb), iph, hdr_len); in xfrm6_transport_output()
116 static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_ro_output() argument
123 iph = ipv6_hdr(skb); in xfrm6_ro_output()
125 hdr_len = x->type->hdr_offset(x, skb, &prevhdr); in xfrm6_ro_output()
128 skb_set_mac_header(skb, in xfrm6_ro_output()
129 (prevhdr - x->props.header_len) - skb->data); in xfrm6_ro_output()
130 skb_set_network_header(skb, -x->props.header_len); in xfrm6_ro_output()
131 skb->transport_header = skb->network_header + hdr_len; in xfrm6_ro_output()
132 __skb_pull(skb, hdr_len); in xfrm6_ro_output()
133 memmove(ipv6_hdr(skb), iph, hdr_len); in xfrm6_ro_output()
148 static int xfrm4_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_beet_encap_add() argument
155 optlen = XFRM_MODE_SKB_CB(skb)->optlen; in xfrm4_beet_encap_add()
159 skb_set_network_header(skb, -x->props.header_len - hdrlen + in xfrm4_beet_encap_add()
160 (XFRM_MODE_SKB_CB(skb)->ihl - sizeof(*top_iph))); in xfrm4_beet_encap_add()
162 skb->network_header += IPV4_BEET_PHMAXLEN; in xfrm4_beet_encap_add()
163 skb->mac_header = skb->network_header + in xfrm4_beet_encap_add()
165 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm4_beet_encap_add()
167 xfrm4_beet_make_header(skb); in xfrm4_beet_encap_add()
169 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdrlen); in xfrm4_beet_encap_add()
171 top_iph = ip_hdr(skb); in xfrm4_beet_encap_add()
197 static int xfrm4_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_tunnel_encap_add() argument
199 struct dst_entry *dst = skb_dst(skb); in xfrm4_tunnel_encap_add()
203 skb_set_inner_network_header(skb, skb_network_offset(skb)); in xfrm4_tunnel_encap_add()
204 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm4_tunnel_encap_add()
206 skb_set_network_header(skb, -x->props.header_len); in xfrm4_tunnel_encap_add()
207 skb->mac_header = skb->network_header + in xfrm4_tunnel_encap_add()
209 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm4_tunnel_encap_add()
210 top_iph = ip_hdr(skb); in xfrm4_tunnel_encap_add()
215 top_iph->protocol = xfrm_af2proto(skb_dst(skb)->ops->family); in xfrm4_tunnel_encap_add()
221 top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos; in xfrm4_tunnel_encap_add()
223 XFRM_MODE_SKB_CB(skb)->tos); in xfrm4_tunnel_encap_add()
230 0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF)); in xfrm4_tunnel_encap_add()
236 ip_select_ident(dev_net(dst->dev), skb, NULL); in xfrm4_tunnel_encap_add()
242 static int xfrm6_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_tunnel_encap_add() argument
244 struct dst_entry *dst = skb_dst(skb); in xfrm6_tunnel_encap_add()
248 skb_set_inner_network_header(skb, skb_network_offset(skb)); in xfrm6_tunnel_encap_add()
249 skb_set_inner_transport_header(skb, skb_transport_offset(skb)); in xfrm6_tunnel_encap_add()
251 skb_set_network_header(skb, -x->props.header_len); in xfrm6_tunnel_encap_add()
252 skb->mac_header = skb->network_header + in xfrm6_tunnel_encap_add()
254 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm6_tunnel_encap_add()
255 top_iph = ipv6_hdr(skb); in xfrm6_tunnel_encap_add()
259 memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, in xfrm6_tunnel_encap_add()
261 top_iph->nexthdr = xfrm_af2proto(skb_dst(skb)->ops->family); in xfrm6_tunnel_encap_add()
266 dsfield = XFRM_MODE_SKB_CB(skb)->tos; in xfrm6_tunnel_encap_add()
267 dsfield = INET_ECN_encapsulate(dsfield, XFRM_MODE_SKB_CB(skb)->tos); in xfrm6_tunnel_encap_add()
277 static int xfrm6_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_beet_encap_add() argument
284 optlen = XFRM_MODE_SKB_CB(skb)->optlen; in xfrm6_beet_encap_add()
288 skb_set_network_header(skb, -x->props.header_len - hdr_len); in xfrm6_beet_encap_add()
290 skb->network_header += IPV4_BEET_PHMAXLEN; in xfrm6_beet_encap_add()
291 skb->mac_header = skb->network_header + in xfrm6_beet_encap_add()
293 skb->transport_header = skb->network_header + sizeof(*top_iph); in xfrm6_beet_encap_add()
294 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdr_len); in xfrm6_beet_encap_add()
296 xfrm6_beet_make_header(skb); in xfrm6_beet_encap_add()
298 top_iph = ipv6_hdr(skb); in xfrm6_beet_encap_add()
328 static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_prepare_output() argument
332 err = xfrm_inner_extract_output(x, skb); in xfrm4_prepare_output()
336 IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE; in xfrm4_prepare_output()
337 skb->protocol = htons(ETH_P_IP); in xfrm4_prepare_output()
341 return xfrm4_beet_encap_add(x, skb); in xfrm4_prepare_output()
343 return xfrm4_tunnel_encap_add(x, skb); in xfrm4_prepare_output()
350 static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_prepare_output() argument
355 err = xfrm_inner_extract_output(x, skb); in xfrm6_prepare_output()
359 skb->ignore_df = 1; in xfrm6_prepare_output()
360 skb->protocol = htons(ETH_P_IPV6); in xfrm6_prepare_output()
364 return xfrm6_beet_encap_add(x, skb); in xfrm6_prepare_output()
366 return xfrm6_tunnel_encap_add(x, skb); in xfrm6_prepare_output()
376 static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm_outer_mode_output() argument
382 return xfrm4_prepare_output(x, skb); in xfrm_outer_mode_output()
384 return xfrm6_prepare_output(x, skb); in xfrm_outer_mode_output()
388 return xfrm4_transport_output(x, skb); in xfrm_outer_mode_output()
390 return xfrm6_transport_output(x, skb); in xfrm_outer_mode_output()
394 return xfrm6_ro_output(x, skb); in xfrm_outer_mode_output()
405 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb) in pktgen_xfrm_outer_mode_output() argument
407 return xfrm_outer_mode_output(x, skb); in pktgen_xfrm_outer_mode_output()
411 static int xfrm_output_one(struct sk_buff *skb, int err) in xfrm_output_one() argument
413 struct dst_entry *dst = skb_dst(skb); in xfrm_output_one()
421 err = xfrm_skb_check_space(skb); in xfrm_output_one()
427 skb->mark = xfrm_smark_get(skb->mark, x); in xfrm_output_one()
429 err = xfrm_outer_mode_output(x, skb); in xfrm_output_one()
449 err = x->repl->overflow(x, skb); in xfrm_output_one()
455 x->curlft.bytes += skb->len; in xfrm_output_one()
460 skb_dst_force(skb); in xfrm_output_one()
461 if (!skb_dst(skb)) { in xfrm_output_one()
467 if (xfrm_offload(skb)) { in xfrm_output_one()
468 x->type_offload->encap(x, skb); in xfrm_output_one()
471 skb->encapsulation = 0; in xfrm_output_one()
473 err = x->type->output(x, skb); in xfrm_output_one()
484 dst = skb_dst_pop(skb); in xfrm_output_one()
490 skb_dst_set(skb, dst); in xfrm_output_one()
499 kfree_skb(skb); in xfrm_output_one()
504 int xfrm_output_resume(struct sk_buff *skb, int err) in xfrm_output_resume() argument
506 struct net *net = xs_net(skb_dst(skb)->xfrm); in xfrm_output_resume()
508 while (likely((err = xfrm_output_one(skb, err)) == 0)) { in xfrm_output_resume()
509 nf_reset_ct(skb); in xfrm_output_resume()
511 err = skb_dst(skb)->ops->local_out(net, skb->sk, skb); in xfrm_output_resume()
515 if (!skb_dst(skb)->xfrm) in xfrm_output_resume()
516 return dst_output(net, skb->sk, skb); in xfrm_output_resume()
518 err = nf_hook(skb_dst(skb)->ops->family, in xfrm_output_resume()
519 NF_INET_POST_ROUTING, net, skb->sk, skb, in xfrm_output_resume()
520 NULL, skb_dst(skb)->dev, xfrm_output2); in xfrm_output_resume()
533 static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb) in xfrm_output2() argument
535 return xfrm_output_resume(skb, 1); in xfrm_output2()
538 static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb) in xfrm_output_gso() argument
542 BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_GSO_CB_OFFSET); in xfrm_output_gso()
543 BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_GSO_CB_OFFSET); in xfrm_output_gso()
544 segs = skb_gso_segment(skb, 0); in xfrm_output_gso()
545 kfree_skb(skb); in xfrm_output_gso()
566 int xfrm_output(struct sock *sk, struct sk_buff *skb) in xfrm_output() argument
568 struct net *net = dev_net(skb_dst(skb)->dev); in xfrm_output()
569 struct xfrm_state *x = skb_dst(skb)->xfrm; in xfrm_output()
574 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); in xfrm_output()
575 IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED; in xfrm_output()
578 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); in xfrm_output()
580 IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED; in xfrm_output()
584 secpath_reset(skb); in xfrm_output()
586 if (xfrm_dev_offload_ok(skb, x)) { in xfrm_output()
589 sp = secpath_set(skb); in xfrm_output()
592 kfree_skb(skb); in xfrm_output()
595 skb->encapsulation = 1; in xfrm_output()
601 if (skb_is_gso(skb)) { in xfrm_output()
602 if (skb->inner_protocol) in xfrm_output()
603 return xfrm_output_gso(net, sk, skb); in xfrm_output()
605 skb_shinfo(skb)->gso_type |= SKB_GSO_ESP; in xfrm_output()
612 if (skb_is_gso(skb)) in xfrm_output()
613 return xfrm_output_gso(net, sk, skb); in xfrm_output()
616 if (skb->ip_summed == CHECKSUM_PARTIAL) { in xfrm_output()
617 err = skb_checksum_help(skb); in xfrm_output()
620 kfree_skb(skb); in xfrm_output()
626 return xfrm_output2(net, sk, skb); in xfrm_output()
630 static int xfrm4_tunnel_check_size(struct sk_buff *skb) in xfrm4_tunnel_check_size() argument
634 if (IPCB(skb)->flags & IPSKB_XFRM_TUNNEL_SIZE) in xfrm4_tunnel_check_size()
637 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)) || skb->ignore_df) in xfrm4_tunnel_check_size()
640 mtu = dst_mtu(skb_dst(skb)); in xfrm4_tunnel_check_size()
641 if ((!skb_is_gso(skb) && skb->len > mtu) || in xfrm4_tunnel_check_size()
642 (skb_is_gso(skb) && in xfrm4_tunnel_check_size()
643 !skb_gso_validate_network_len(skb, ip_skb_dst_mtu(skb->sk, skb)))) { in xfrm4_tunnel_check_size()
644 skb->protocol = htons(ETH_P_IP); in xfrm4_tunnel_check_size()
646 if (skb->sk) in xfrm4_tunnel_check_size()
647 xfrm_local_error(skb, mtu); in xfrm4_tunnel_check_size()
649 icmp_send(skb, ICMP_DEST_UNREACH, in xfrm4_tunnel_check_size()
657 static int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm4_extract_output() argument
662 ip_is_fragment(ip_hdr(skb))) { in xfrm4_extract_output()
667 err = xfrm4_tunnel_check_size(skb); in xfrm4_extract_output()
671 XFRM_MODE_SKB_CB(skb)->protocol = ip_hdr(skb)->protocol; in xfrm4_extract_output()
673 xfrm4_extract_header(skb); in xfrm4_extract_output()
678 static int xfrm6_tunnel_check_size(struct sk_buff *skb) in xfrm6_tunnel_check_size() argument
681 struct dst_entry *dst = skb_dst(skb); in xfrm6_tunnel_check_size()
683 if (skb->ignore_df) in xfrm6_tunnel_check_size()
690 if ((!skb_is_gso(skb) && skb->len > mtu) || in xfrm6_tunnel_check_size()
691 (skb_is_gso(skb) && in xfrm6_tunnel_check_size()
692 !skb_gso_validate_network_len(skb, ip6_skb_dst_mtu(skb)))) { in xfrm6_tunnel_check_size()
693 skb->dev = dst->dev; in xfrm6_tunnel_check_size()
694 skb->protocol = htons(ETH_P_IPV6); in xfrm6_tunnel_check_size()
696 if (xfrm6_local_dontfrag(skb->sk)) in xfrm6_tunnel_check_size()
697 ipv6_stub->xfrm6_local_rxpmtu(skb, mtu); in xfrm6_tunnel_check_size()
698 else if (skb->sk) in xfrm6_tunnel_check_size()
699 xfrm_local_error(skb, mtu); in xfrm6_tunnel_check_size()
701 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); in xfrm6_tunnel_check_size()
709 static int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm6_extract_output() argument
714 err = xfrm6_tunnel_check_size(skb); in xfrm6_extract_output()
718 XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr; in xfrm6_extract_output()
720 xfrm6_extract_header(skb); in xfrm6_extract_output()
728 static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb) in xfrm_inner_extract_output() argument
734 xfrm_af2proto(skb_dst(skb)->ops->family)); in xfrm_inner_extract_output()
743 return xfrm4_extract_output(x, skb); in xfrm_inner_extract_output()
745 return xfrm6_extract_output(x, skb); in xfrm_inner_extract_output()
751 void xfrm_local_error(struct sk_buff *skb, int mtu) in xfrm_local_error() argument
756 if (skb->protocol == htons(ETH_P_IP)) in xfrm_local_error()
758 else if (skb->protocol == htons(ETH_P_IPV6) && in xfrm_local_error()
759 skb->sk->sk_family == AF_INET6) in xfrm_local_error()
766 afinfo->local_error(skb, mtu); in xfrm_local_error()