[IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr

This patch removes the duplicate ipv6_{auth,esp,comp}_hdr structures since
they're identical to the IPv4 versions.  Duplicating them would only create
problems for ourselves later when we need to add things like extended
sequence numbers.

I've also added transport header type conversion headers for these types
which are now used by the transforms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 9 deletions

diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index 87e6407ebf97..8f3f32faaf4c 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -65,7 +65,7 @@ static LIST_HEAD(ipcomp6_tfms_list);
 static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb)
 {
         int err = -ENOMEM;
-        struct ipv6_comp_hdr *ipch;
+        struct ip_comp_hdr *ipch;
         int plen, dlen;
         struct ipcomp_data *ipcd = x->data;
         u8 *start, *scratch;
@@ -92,12 +92,10 @@ static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb)
         tfm = *per_cpu_ptr(ipcd->tfms, cpu);
 
         err = crypto_comp_decompress(tfm, start, plen, scratch, &dlen);
-        if (err) {
-                err = -EINVAL;
+        if (err)
                 goto out_put_cpu;
-        }
 
-        if (dlen < (plen + sizeof(struct ipv6_comp_hdr))) {
+        if (dlen < (plen + sizeof(*ipch))) {
                 err = -EINVAL;
                 goto out_put_cpu;
         }
@@ -122,7 +120,7 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb)
 {
         int err;
         struct ipv6hdr *top_iph;
-        struct ipv6_comp_hdr *ipch;
+        struct ip_comp_hdr *ipch;
         struct ipcomp_data *ipcd = x->data;
         int plen, dlen;
         u8 *start, *scratch;
@@ -151,7 +149,7 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb)
         tfm = *per_cpu_ptr(ipcd->tfms, cpu);
 
         err = crypto_comp_compress(tfm, start, plen, scratch, &dlen);
-        if (err || (dlen + sizeof(struct ipv6_comp_hdr)) >= plen) {
+        if (err || (dlen + sizeof(*ipch)) >= plen) {
                 put_cpu();
                 goto out_ok;
         }
@@ -164,7 +162,7 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb)
 
         top_iph->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
 
-        ipch = (struct ipv6_comp_hdr *)start;
+        ipch = ip_comp_hdr(skb);
         ipch->nexthdr = *skb_mac_header(skb);
         ipch->flags = 0;
         ipch->cpi = htons((u16 )ntohl(x->id.spi));
@@ -179,7 +177,8 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 {
         __be32 spi;
         struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
-        struct ipv6_comp_hdr *ipcomph = (struct ipv6_comp_hdr*)(skb->data+offset);
+        struct ip_comp_hdr *ipcomph =
+                (struct ip_comp_hdr *)(skb->data + offset);
         struct xfrm_state *x;
 
         if (type != ICMPV6_DEST_UNREACH && type != ICMPV6_PKT_TOOBIG)