sctp: translate host order to network order when setting a hmacid
authorlucien <lucien.xin@gmail.com>
Thu, 12 Nov 2015 05:07:07 +0000 (13:07 +0800)
committerDavid S. Miller <davem@davemloft.net>
Sun, 15 Nov 2015 23:27:27 +0000 (18:27 -0500)
now sctp auth cannot work well when setting a hmacid manually, which
is caused by that we didn't use the network order for hmacid, so fix
it by adding the transformation in sctp_auth_ep_set_hmacs.

even we set hmacid with the network order in userspace, it still
can't work, because of this condition in sctp_auth_ep_set_hmacs():

if (id > SCTP_AUTH_HMAC_ID_MAX)
return -EOPNOTSUPP;

so this wasn't working before and thus it won't break compatibility.

Fixes: 65b07e5d0d09 ("[SCTP]: API updates to suport SCTP-AUTH extensions.")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sctp/auth.c

index 4f15b7d730e13d6aaa58ba7a28262c9831afea95..1543e39f47c33f6662abd80b5846a845d3760fdc 100644 (file)
@@ -809,8 +809,8 @@ int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
        if (!has_sha1)
                return -EINVAL;
 
-       memcpy(ep->auth_hmacs_list->hmac_ids, &hmacs->shmac_idents[0],
-               hmacs->shmac_num_idents * sizeof(__u16));
+       for (i = 0; i < hmacs->shmac_num_idents; i++)
+               ep->auth_hmacs_list->hmac_ids[i] = htons(hmacs->shmac_idents[i]);
        ep->auth_hmacs_list->param_hdr.length = htons(sizeof(sctp_paramhdr_t) +
                                hmacs->shmac_num_idents * sizeof(__u16));
        return 0;