On Mon, Jan 28, 2019 at 03:08:24PM +0800, Xin Long wrote:
> Check with SCTP_FUTURE_ASSOC instead in
> sctp_/setgetsockopt_peer_addr_params, it's compatible with 0.
>
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
> ---
> net/sctp/socket.c | 18 ++++++++++--------
> 1 file changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index a52d132..4c43b95 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -2750,12 +2750,13 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
> return -EINVAL;
> }
>
> - /* Get association, if assoc_id != 0 and the socket is a one
> - * to many style socket, and an association was not found, then
> - * the id was invalid.
> + /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
> + * socket is a one to many style socket, and an association
> + * was not found, then the id was invalid.
> */
> asoc = sctp_id2assoc(sk, params.spp_assoc_id);
> - if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP))
> + if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
Sorry to follow up, but I misspoke in my previous email, I should have said, why
do we only allow future associations as the only special case association id
here? Since the function is meant to set a specific association id, it seems to
me that you would want to:
a) allow setting of a specific id
b) allow setting of all association ids on the socket
(SCTP_CURRENT_ASSOC)
c) allow recording of a set of params to apply to all current and future
associations (FUTURE/ALL).
(a) is already handled clearly, but (b) and (c) require more work on this
function than just checking association id on entry.
I think this comment may apply to all the socket option functions
> + sctp_style(sk, UDP))
> return -EINVAL;
>
> /* Heartbeat demand can only be sent on a transport or
> @@ -5676,12 +5677,13 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
> }
> }
>
> - /* Get association, if assoc_id != 0 and the socket is a one
> - * to many style socket, and an association was not found, then
> - * the id was invalid.
> + /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
> + * socket is a one to many style socket, and an association
> + * was not found, then the id was invalid.
> */
> asoc = sctp_id2assoc(sk, params.spp_assoc_id);
> - if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) {
> + if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
> + sctp_style(sk, UDP)) {
> pr_debug("%s: failed no association\n", __func__);
> return -EINVAL;
> }
> --
> 2.1.0
>
>
