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sctp: use SCTP_FUTURE_ASSOC for SCTP_PR_SUPPORTED sockopt

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Check with SCTP_FUTURE_ASSOC instead in
sctp_set/getsockopt_pr_supported, it's compatible with 0.

It also adjusts some code to keep a same check form as other functions.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-01-28 15:08:30 +08:00 committed by David S. Miller
parent 8add543e36
commit fb19560508
1 changed files with 11 additions and 7 deletions
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18
net/sctp/socket.c
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@ -3965,6 +3965,7 @@ static int sctp_setsockopt_pr_supported(struct sock *sk,
unsigned int optlen)
{
struct sctp_assoc_value params;
struct sctp_association *asoc;
if (optlen != sizeof(params))
return -EINVAL;
@ -3972,6 +3973,11 @@ static int sctp_setsockopt_pr_supported(struct sock *sk,
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
sctp_sk(sk)->ep->prsctp_enable = !!params.assoc_value;
return 0;
@ -7084,17 +7090,15 @@ static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
goto out;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (asoc) {
params.assoc_value = asoc->prsctp_enable;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
params.assoc_value = sp->ep->prsctp_enable;
} else {
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
sctp_style(sk, UDP)) {
retval = -EINVAL;
goto out;
}
params.assoc_value = asoc ? asoc->prsctp_enable
: sctp_sk(sk)->ep->prsctp_enable;
if (put_user(len, optlen))
goto out;