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| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2007-10-10 15:44:44 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:55:54 -0700 |
| commit | 37fedd3aab6517daec628764c5d66dd8761fbe5f (patch) | |
| tree | 12227aec3944168bff04173dccd580240f4496aa /net/ipv4/ipcomp.c | |
| parent | [IPSEC]: Set skb->data to payload in x->mode->output (diff) | |
| download | wireguard-linux-37fedd3aab6517daec628764c5d66dd8761fbe5f.tar.xz wireguard-linux-37fedd3aab6517daec628764c5d66dd8761fbe5f.zip | |
[IPSEC]: Use IPv6 calling convention as the convention for x->mode->output
The IPv6 calling convention for x->mode->output is more general and could
help an eventual protocol-generic x->type->output implementation. This
patch adopts it for IPv4 as well and modifies the IPv4 type output functions
accordingly.
It also rewrites the IPv6 mac/transport header calculation to be based off
the network header where practical.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipcomp.c')
| -rw-r--r-- | net/ipv4/ipcomp.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c index 1929d451dab5..bf74f64fe5fb 100644 --- a/net/ipv4/ipcomp.c +++ b/net/ipv4/ipcomp.c @@ -98,10 +98,10 @@ out: static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb) { struct ipcomp_data *ipcd = x->data; - const int ihlen = ip_hdrlen(skb); + const int ihlen = skb_transport_offset(skb); const int plen = skb->len - ihlen; int dlen = IPCOMP_SCRATCH_SIZE; - u8 *start = skb->data + ihlen; + u8 *start = skb_transport_header(skb); const int cpu = get_cpu(); u8 *scratch = *per_cpu_ptr(ipcomp_scratches, cpu); struct crypto_comp *tfm = *per_cpu_ptr(ipcd->tfms, cpu); @@ -154,11 +154,11 @@ static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb) /* Install ipcomp header, convert into ipcomp datagram. */ iph->tot_len = htons(skb->len); - ipch = (struct ip_comp_hdr *)((char *)iph + iph->ihl * 4); - ipch->nexthdr = iph->protocol; + ipch = (struct ip_comp_hdr *)skb_transport_header(skb); + ipch->nexthdr = *skb_mac_header(skb); ipch->flags = 0; ipch->cpi = htons((u16 )ntohl(x->id.spi)); - iph->protocol = IPPROTO_COMP; + *skb_mac_header(skb) = IPPROTO_COMP; ip_send_check(iph); return 0; |