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| author | Daniel Borkmann <dborkman@redhat.com> | 2013-02-07 01:41:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-07 23:44:37 -0500 |
| commit | 241448c2b84ff02a46ce88199e05fdeb55bad449 (patch) | |
| tree | 41ae60dff8ed4f72657271892dd618754cc3e78a | |
| parent | 85bd1798b24a13462d7b064961e7a9da3bb12db1 (diff) | |
| download | linux-241448c2b84ff02a46ce88199e05fdeb55bad449.tar.gz linux-241448c2b84ff02a46ce88199e05fdeb55bad449.tar.bz2 linux-241448c2b84ff02a46ce88199e05fdeb55bad449.zip | |
net: sctp: sctp_auth_make_key_vector: remove duplicate ntohs calls
Instead of calling 3 times ntohs(random->param_hdr.length), 2 times
ntohs(hmacs->param_hdr.length), and 3 times ntohs(chunks->param_hdr.length)
within the same function, we only call each once and store it in a
variable.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sctp/auth.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/net/sctp/auth.c b/net/sctp/auth.c index 159b9bc5d633..94a12de58691 100644 --- a/net/sctp/auth.c +++ b/net/sctp/auth.c @@ -200,10 +200,14 @@ static struct sctp_auth_bytes *sctp_auth_make_key_vector( struct sctp_auth_bytes *new; __u32 len; __u32 offset = 0; + __u16 random_len, hmacs_len, chunks_len = 0; - len = ntohs(random->param_hdr.length) + ntohs(hmacs->param_hdr.length); - if (chunks) - len += ntohs(chunks->param_hdr.length); + random_len = ntohs(random->param_hdr.length); + hmacs_len = ntohs(hmacs->param_hdr.length); + if (chunks) + chunks_len = ntohs(chunks->param_hdr.length); + + len = random_len + hmacs_len + chunks_len; new = kmalloc(sizeof(struct sctp_auth_bytes) + len, gfp); if (!new) @@ -211,16 +215,15 @@ static struct sctp_auth_bytes *sctp_auth_make_key_vector( new->len = len; - memcpy(new->data, random, ntohs(random->param_hdr.length)); - offset += ntohs(random->param_hdr.length); + memcpy(new->data, random, random_len); + offset += random_len; if (chunks) { - memcpy(new->data + offset, chunks, - ntohs(chunks->param_hdr.length)); - offset += ntohs(chunks->param_hdr.length); + memcpy(new->data + offset, chunks, chunks_len); + offset += chunks_len; } - memcpy(new->data + offset, hmacs, ntohs(hmacs->param_hdr.length)); + memcpy(new->data + offset, hmacs, hmacs_len); return new; } |