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)
32 struct dst_entry *dst = skb_dst(skb);
34 - skb_headroom(skb);
35 int ntail = dst->dev->needed_tailroom - skb_tailroom(skb);
44 return pskb_expand_head(skb, nhead, ntail, GFP_ATOMIC);
51 static struct dst_entry *skb_dst_pop(struct sk_buff *skb)
53 struct dst_entry *child = dst_clone(xfrm_dst_child(skb_dst(skb)));
55 skb_dst_drop(skb);
64 static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
66 struct iphdr *iph = ip_hdr(skb);
69 skb_set_inner_transport_header(skb, skb_transport_offset(skb));
71 skb_set_network_header(skb, -x->props.header_len);
72 skb->mac_header = skb->network_header +
74 skb->transport_header = skb->network_header + ihl;
75 __skb_pull(skb, ihl);
76 memmove(skb_network_header(skb), iph, ihl);
85 static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
92 iph = ipv6_hdr(skb);
93 skb_set_inner_transport_header(skb, skb_transport_offset(skb));
95 hdr_len = x->type->hdr_offset(x, skb, &prevhdr);
98 skb_set_mac_header(skb,
99 (prevhdr - x->props.header_len) - skb->data);
100 skb_set_network_header(skb, -x->props.header_len);
101 skb->transport_header = skb->network_header + hdr_len;
102 __skb_pull(skb, hdr_len);
103 memmove(ipv6_hdr(skb), iph, hdr_len);
116 static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb)
123 iph = ipv6_hdr(skb);
125 hdr_len = x->type->hdr_offset(x, skb, &prevhdr);
128 skb_set_mac_header(skb,
129 (prevhdr - x->props.header_len) - skb->data);
130 skb_set_network_header(skb, -x->props.header_len);
131 skb->transport_header = skb->network_header + hdr_len;
132 __skb_pull(skb, hdr_len);
133 memmove(ipv6_hdr(skb), iph, hdr_len);
148 static int xfrm4_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb)
155 optlen = XFRM_MODE_SKB_CB(skb)->optlen;
159 skb_set_network_header(skb, -x->props.header_len - hdrlen +
160 (XFRM_MODE_SKB_CB(skb)->ihl - sizeof(*top_iph)));
162 skb->network_header += IPV4_BEET_PHMAXLEN;
163 skb->mac_header = skb->network_header +
165 skb->transport_header = skb->network_header + sizeof(*top_iph);
167 xfrm4_beet_make_header(skb);
169 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdrlen);
171 top_iph = ip_hdr(skb);
197 static int xfrm4_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb)
199 struct dst_entry *dst = skb_dst(skb);
203 skb_set_inner_network_header(skb, skb_network_offset(skb));
204 skb_set_inner_transport_header(skb, skb_transport_offset(skb));
206 skb_set_network_header(skb, -x->props.header_len);
207 skb->mac_header = skb->network_header +
209 skb->transport_header = skb->network_header + sizeof(*top_iph);
210 top_iph = ip_hdr(skb);
215 top_iph->protocol = xfrm_af2proto(skb_dst(skb)->ops->family);
221 top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
223 XFRM_MODE_SKB_CB(skb)->tos);
230 0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF));
236 ip_select_ident(dev_net(dst->dev), skb, NULL);
242 static int xfrm6_tunnel_encap_add(struct xfrm_state *x, struct sk_buff *skb)
244 struct dst_entry *dst = skb_dst(skb);
248 skb_set_inner_network_header(skb, skb_network_offset(skb));
249 skb_set_inner_transport_header(skb, skb_transport_offset(skb));
251 skb_set_network_header(skb, -x->props.header_len);
252 skb->mac_header = skb->network_header +
254 skb->transport_header = skb->network_header + sizeof(*top_iph);
255 top_iph = ipv6_hdr(skb);
259 memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
261 top_iph->nexthdr = xfrm_af2proto(skb_dst(skb)->ops->family);
266 dsfield = XFRM_MODE_SKB_CB(skb)->tos;
267 dsfield = INET_ECN_encapsulate(dsfield, XFRM_MODE_SKB_CB(skb)->tos);
277 static int xfrm6_beet_encap_add(struct xfrm_state *x, struct sk_buff *skb)
284 optlen = XFRM_MODE_SKB_CB(skb)->optlen;
288 skb_set_network_header(skb, -x->props.header_len - hdr_len);
290 skb->network_header += IPV4_BEET_PHMAXLEN;
291 skb->mac_header = skb->network_header +
293 skb->transport_header = skb->network_header + sizeof(*top_iph);
294 ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdr_len);
296 xfrm6_beet_make_header(skb);
298 top_iph = ipv6_hdr(skb);
326 * while skb->data will point to the payload.
328 static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
332 err = xfrm_inner_extract_output(x, skb);
336 IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
337 skb->protocol = htons(ETH_P_IP);
341 return xfrm4_beet_encap_add(x, skb);
343 return xfrm4_tunnel_encap_add(x, skb);
350 static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
355 err = xfrm_inner_extract_output(x, skb);
359 skb->ignore_df = 1;
360 skb->protocol = htons(ETH_P_IPV6);
364 return xfrm6_beet_encap_add(x, skb);
366 return xfrm6_tunnel_encap_add(x, skb);
376 static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb)
382 return xfrm4_prepare_output(x, skb);
384 return xfrm6_prepare_output(x, skb);
388 return xfrm4_transport_output(x, skb);
390 return xfrm6_transport_output(x, skb);
394 return xfrm6_ro_output(x, skb);
406 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb)
408 return xfrm_outer_mode_output(x, skb);
413 static int xfrm_output_one(struct sk_buff *skb, int err)
415 struct dst_entry *dst = skb_dst(skb);
423 err = xfrm_skb_check_space(skb);
429 skb->mark = xfrm_smark_get(skb->mark, x);
431 err = xfrm_outer_mode_output(x, skb);
451 err = x->repl->overflow(x, skb);
457 x->curlft.bytes += skb->len;
462 skb_dst_force(skb);
463 if (!skb_dst(skb)) {
469 if (xfrm_offload(skb)) {
470 x->type_offload->encap(x, skb);
473 skb->encapsulation = 0;
475 err = x->type->output(x, skb);
486 dst = skb_dst_pop(skb);
492 skb_dst_set(skb, dst);
501 kfree_skb(skb);
506 int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err)
508 struct net *net = xs_net(skb_dst(skb)->xfrm);
510 while (likely((err = xfrm_output_one(skb, err)) == 0)) {
511 nf_reset_ct(skb);
513 err = skb_dst(skb)->ops->local_out(net, sk, skb);
517 if (!skb_dst(skb)->xfrm)
518 return dst_output(net, sk, skb);
520 err = nf_hook(skb_dst(skb)->ops->family,
521 NF_INET_POST_ROUTING, net, sk, skb,
522 NULL, skb_dst(skb)->dev, xfrm_output2);
535 static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb)
537 return xfrm_output_resume(sk, skb, 1);
540 static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb)
544 BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_GSO_CB_OFFSET);
545 BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_GSO_CB_OFFSET);
546 segs = skb_gso_segment(skb, 0);
547 kfree_skb(skb);
568 int xfrm_output(struct sock *sk, struct sk_buff *skb)
570 struct net *net = dev_net(skb_dst(skb)->dev);
571 struct xfrm_state *x = skb_dst(skb)->xfrm;
576 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
577 IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;
580 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
582 IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
586 secpath_reset(skb);
588 if (xfrm_dev_offload_ok(skb, x)) {
591 sp = secpath_set(skb);
594 kfree_skb(skb);
597 skb->encapsulation = 1;
603 if (skb_is_gso(skb)) {
604 if (skb->inner_protocol)
605 return xfrm_output_gso(net, sk, skb);
607 skb_shinfo(skb)->gso_type |= SKB_GSO_ESP;
614 if (skb_is_gso(skb))
615 return xfrm_output_gso(net, sk, skb);
618 if (skb->ip_summed == CHECKSUM_PARTIAL) {
619 err = skb_checksum_help(skb);
622 kfree_skb(skb);
628 return xfrm_output2(net, sk, skb);
632 static int xfrm4_tunnel_check_size(struct sk_buff *skb)
636 if (IPCB(skb)->flags & IPSKB_XFRM_TUNNEL_SIZE)
639 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)) || skb->ignore_df)
642 mtu = dst_mtu(skb_dst(skb));
643 if ((!skb_is_gso(skb) && skb->len > mtu) ||
644 (skb_is_gso(skb) &&
645 !skb_gso_validate_network_len(skb, ip_skb_dst_mtu(skb->sk, skb)))) {
646 skb->protocol = htons(ETH_P_IP);
648 if (skb->sk)
649 xfrm_local_error(skb, mtu);
651 icmp_send(skb, ICMP_DEST_UNREACH,
659 static int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb)
664 ip_is_fragment(ip_hdr(skb))) {
669 err = xfrm4_tunnel_check_size(skb);
673 XFRM_MODE_SKB_CB(skb)->protocol = ip_hdr(skb)->protocol;
675 xfrm4_extract_header(skb);
680 static int xfrm6_tunnel_check_size(struct sk_buff *skb)
683 struct dst_entry *dst = skb_dst(skb);
685 if (skb->ignore_df)
692 if ((!skb_is_gso(skb) && skb->len > mtu) ||
693 (skb_is_gso(skb) &&
694 !skb_gso_validate_network_len(skb, ip6_skb_dst_mtu(skb)))) {
695 skb->dev = dst->dev;
696 skb->protocol = htons(ETH_P_IPV6);
698 if (xfrm6_local_dontfrag(skb->sk))
699 ipv6_stub->xfrm6_local_rxpmtu(skb, mtu);
700 else if (skb->sk)
701 xfrm_local_error(skb, mtu);
703 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
711 static int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
716 err = xfrm6_tunnel_check_size(skb);
720 XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr;
722 xfrm6_extract_header(skb);
730 static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
736 xfrm_af2proto(skb_dst(skb)->ops->family));
745 return xfrm4_extract_output(x, skb);
747 return xfrm6_extract_output(x, skb);
753 void xfrm_local_error(struct sk_buff *skb, int mtu)
758 if (skb->protocol == htons(ETH_P_IP))
760 else if (skb->protocol == htons(ETH_P_IPV6) &&
761 skb->sk->sk_family == AF_INET6)
768 afinfo->local_error(skb, mtu);