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[IPSEC]: Get nexthdr from caller in xfrm6_rcv_spi

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Currently xfrm6_rcv_spi gets the nexthdr value itself from the packet.
This means that we need to fix up the value in case we have a 4-on-6
tunnel.  Moving this logic into the caller simplifies things and allows
us to merge the code with IPv4.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2007-10-17 21:29:25 -07:00 committed by David S. Miller
parent c4541b41c0
commit 33b5ecb8f6
3 changed files with 6 additions and 7 deletions
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2
include/net/xfrm.h
View File

@ -1058,7 +1058,7 @@ static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
extern int xfrm4_output(struct sk_buff *skb);
extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi);
extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
extern int xfrm6_rcv(struct sk_buff *skb);
extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
xfrm_address_t *saddr, u8 proto);

9
net/ipv6/xfrm6_input.c
View File

@ -16,7 +16,7 @@
#include <net/ipv6.h>
#include <net/xfrm.h>
int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi)
int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
{
int err;
__be32 seq;
@ -24,11 +24,9 @@ int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi)
struct xfrm_state *x;
int xfrm_nr = 0;
int decaps = 0;
int nexthdr;
unsigned int nhoff;
nhoff = IP6CB(skb)->nhoff;
nexthdr = skb_network_header(skb)[nhoff];
seq = 0;
if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
@ -41,7 +39,7 @@ int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi)
goto drop;
x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, spi,
nexthdr != IPPROTO_IPIP ? nexthdr : IPPROTO_IPV6, AF_INET6);
nexthdr, AF_INET6);
if (x == NULL)
goto drop;
spin_lock(&x->lock);
@ -135,7 +133,8 @@ EXPORT_SYMBOL(xfrm6_rcv_spi);
int xfrm6_rcv(struct sk_buff *skb)
{
return xfrm6_rcv_spi(skb, 0);
return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
0);
}
EXPORT_SYMBOL(xfrm6_rcv);

2
net/ipv6/xfrm6_tunnel.c
View File

@ -257,7 +257,7 @@ static int xfrm6_tunnel_rcv(struct sk_buff *skb)
__be32 spi;
spi = xfrm6_tunnel_spi_lookup((xfrm_address_t *)&iph->saddr);
return xfrm6_rcv_spi(skb, spi) > 0 ? : 0;
return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi) > 0 ? : 0;
}
static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,