sctp: remove unnecessary byteshifting, calculate directly in big-endian
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/nf_nat_proto_sctp.c b/net/ipv4/netfilter/nf_nat_proto_sctp.c
index 82e4c0e..65e470b 100644
--- a/net/ipv4/netfilter/nf_nat_proto_sctp.c
+++ b/net/ipv4/netfilter/nf_nat_proto_sctp.c
@@ -36,7 +36,7 @@
sctp_sctphdr_t *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
__be32 oldip, newip;
- u32 crc32;
+ __be32 crc32;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
@@ -61,7 +61,7 @@
crc32 = sctp_update_cksum((u8 *)skb->data, skb_headlen(skb),
crc32);
crc32 = sctp_end_cksum(crc32);
- hdr->checksum = htonl(crc32);
+ hdr->checksum = crc32;
return true;
}
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 5ed93c0..a49fa80 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -83,8 +83,8 @@
{
struct sk_buff *list = skb_shinfo(skb)->frag_list;
struct sctphdr *sh = sctp_hdr(skb);
- __u32 cmp = ntohl(sh->checksum);
- __u32 val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
+ __be32 cmp = sh->checksum;
+ __be32 val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
for (; list; list = list->next)
val = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
diff --git a/net/sctp/output.c b/net/sctp/output.c
index 9a63a3f..4568464 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -365,7 +365,7 @@
struct sctp_transport *tp = packet->transport;
struct sctp_association *asoc = tp->asoc;
struct sctphdr *sh;
- __u32 crc32 = 0;
+ __be32 crc32 = __constant_cpu_to_be32(0);
struct sk_buff *nskb;
struct sctp_chunk *chunk, *tmp;
struct sock *sk;
@@ -538,7 +538,7 @@
/* 3) Put the resultant value into the checksum field in the
* common header, and leave the rest of the bits unchanged.
*/
- sh->checksum = htonl(crc32);
+ sh->checksum = crc32;
/* IP layer ECN support
* From RFC 2481