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authorJoakim Koskela <jookos@gmail.com>2008-08-06 02:40:25 -0700
committerDavid S. Miller <davem@davemloft.net>2008-08-06 02:40:25 -0700
commitabf5cdb89d09ca981db10e1a85fd8531440165f2 (patch)
tree95c340f429fcb0c11d0af01fa840d84bb81895f5 /net
parenteb49e63093498cd17382018495b8cfb5b4a679bd (diff)
ipsec: Interfamily IPSec BEET, ipv4-inner ipv6-outer
Here's a revised version, based on Herbert's comments, of a fix for the ipv4-inner, ipv6-outer interfamily ipsec beet mode. It fixes the network header adjustment during interfamily, as well as makes sure that we reserve enough room for the new ipv6 header if we might have something else as the inner family. Also, the ipv4 pseudo header construction was added. Signed-off-by: Joakim Koskela <jookos@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/esp6.c4
-rw-r--r--net/ipv6/xfrm6_mode_beet.c29
2 files changed, 30 insertions, 3 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index c6bb4c6d24b..b181b08fb76 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -521,6 +521,10 @@ static int esp6_init_state(struct xfrm_state *x)
crypto_aead_ivsize(aead);
switch (x->props.mode) {
case XFRM_MODE_BEET:
+ if (x->sel.family != AF_INET6)
+ x->props.header_len += IPV4_BEET_PHMAXLEN +
+ (sizeof(struct ipv6hdr) - sizeof(struct iphdr));
+ break;
case XFRM_MODE_TRANSPORT:
break;
case XFRM_MODE_TUNNEL:
diff --git a/net/ipv6/xfrm6_mode_beet.c b/net/ipv6/xfrm6_mode_beet.c
index d6ce400f585..bbd48b101ba 100644
--- a/net/ipv6/xfrm6_mode_beet.c
+++ b/net/ipv6/xfrm6_mode_beet.c
@@ -40,16 +40,39 @@ static void xfrm6_beet_make_header(struct sk_buff *skb)
static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb)
{
struct ipv6hdr *top_iph;
-
- skb_set_network_header(skb, -x->props.header_len);
+ struct ip_beet_phdr *ph;
+ struct iphdr *iphv4;
+ int optlen, hdr_len;
+
+ iphv4 = ip_hdr(skb);
+ hdr_len = 0;
+ optlen = XFRM_MODE_SKB_CB(skb)->optlen;
+ if (unlikely(optlen))
+ hdr_len += IPV4_BEET_PHMAXLEN - (optlen & 4);
+
+ skb_set_network_header(skb, -x->props.header_len - hdr_len);
+ if (x->sel.family != AF_INET6)
+ skb->network_header += IPV4_BEET_PHMAXLEN;
skb->mac_header = skb->network_header +
offsetof(struct ipv6hdr, nexthdr);
skb->transport_header = skb->network_header + sizeof(*top_iph);
- __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl);
+ ph = (struct ip_beet_phdr *)__skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl-hdr_len);
xfrm6_beet_make_header(skb);
top_iph = ipv6_hdr(skb);
+ if (unlikely(optlen)) {
+
+ BUG_ON(optlen < 0);
+
+ ph->padlen = 4 - (optlen & 4);
+ ph->hdrlen = optlen / 8;
+ ph->nexthdr = top_iph->nexthdr;
+ if (ph->padlen)
+ memset(ph + 1, IPOPT_NOP, ph->padlen);
+
+ top_iph->nexthdr = IPPROTO_BEETPH;
+ }
ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);