diff options
Diffstat (limited to 'net/ipv6/xfrm6_mode_beet.c')
| -rw-r--r-- | net/ipv6/xfrm6_mode_beet.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/net/ipv6/xfrm6_mode_beet.c b/net/ipv6/xfrm6_mode_beet.c index 4988ed9c76c6..0527d11c1ae3 100644 --- a/net/ipv6/xfrm6_mode_beet.c +++ b/net/ipv6/xfrm6_mode_beet.c @@ -19,6 +19,20 @@ #include <net/ipv6.h> #include <net/xfrm.h> +static void xfrm6_beet_make_header(struct sk_buff *skb) +{ + struct ipv6hdr *iph = ipv6_hdr(skb); + + iph->version = 6; + + memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, + sizeof(iph->flow_lbl)); + iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol; + + ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos); + iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl; +} + /* Add encapsulation header. * * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt. @@ -31,16 +45,11 @@ static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb) skb->mac_header = skb->network_header + offsetof(struct ipv6hdr, nexthdr); skb->transport_header = skb->network_header + sizeof(*top_iph); - top_iph = ipv6_hdr(skb); - top_iph->version = 6; + xfrm6_beet_make_header(skb); - memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, - sizeof(top_iph->flow_lbl)); - top_iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol; + top_iph = ipv6_hdr(skb); - ipv6_change_dsfield(top_iph, 0, XFRM_MODE_SKB_CB(skb)->tos); - top_iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl; ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr); ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr); return 0; @@ -51,19 +60,21 @@ static int xfrm6_beet_input(struct xfrm_state *x, struct sk_buff *skb) struct ipv6hdr *ip6h; const unsigned char *old_mac; int size = sizeof(struct ipv6hdr); - int err = -EINVAL; + int err; - if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) + err = skb_cow_head(skb, size + skb->mac_len); + if (err) goto out; - skb_push(skb, size); - memmove(skb->data, skb_network_header(skb), size); + __skb_push(skb, size); skb_reset_network_header(skb); old_mac = skb_mac_header(skb); skb_set_mac_header(skb, -skb->mac_len); memmove(skb_mac_header(skb), old_mac, skb->mac_len); + xfrm6_beet_make_header(skb); + ip6h = ipv6_hdr(skb); ip6h->payload_len = htons(skb->len - size); ipv6_addr_copy(&ip6h->daddr, (struct in6_addr *) &x->sel.daddr.a6); @@ -74,7 +85,8 @@ out: } static struct xfrm_mode xfrm6_beet_mode = { - .input = xfrm6_beet_input, + .input2 = xfrm6_beet_input, + .input = xfrm_prepare_input, .output2 = xfrm6_beet_output, .output = xfrm6_prepare_output, .owner = THIS_MODULE, |