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sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_EVENT sockopt 

Check with SCTP_ALL_ASSOC instead in sctp_setsockopt_event and
check with SCTP_FUTURE_ASSOC instead in sctp_getsockopt_event,
it's compatible with 0.

SCTP_CURRENT_ASSOC is supported for SCTP_EVENT in this patch.

It also adds sctp_assoc_ulpevent_type_set() to make code more
readable.

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 15:08:45 +08:00 committed by David S. Miller
parent 99a62135e1
commit d251f05e3b
1 changed files with 55 additions and 36 deletions
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91
net/sctp/socket.c
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@ -4477,54 +4477,69 @@ static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval,
return 0;
}
static int sctp_setsockopt_event(struct sock *sk, char __user *optval,
unsigned int optlen)
static int sctp_assoc_ulpevent_type_set(struct sctp_event *param,
struct sctp_association *asoc)
{
struct sctp_association *asoc;
struct sctp_ulpevent *event;
struct sctp_event param;
int retval = 0;
if (optlen < sizeof(param)) {
retval = -EINVAL;
goto out;
}
sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on);
optlen = sizeof(param);
if (copy_from_user(&param, optval, optlen)) {
retval = -EFAULT;
goto out;
}
if (param.se_type < SCTP_SN_TYPE_BASE ||
param.se_type > SCTP_SN_TYPE_MAX) {
retval = -EINVAL;
goto out;
}
asoc = sctp_id2assoc(sk, param.se_assoc_id);
if (!asoc) {
sctp_ulpevent_type_set(&sctp_sk(sk)->subscribe,
param.se_type, param.se_on);
goto out;
}
sctp_ulpevent_type_set(&asoc->subscribe, param.se_type, param.se_on);
if (param.se_type == SCTP_SENDER_DRY_EVENT && param.se_on) {
if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) {
if (sctp_outq_is_empty(&asoc->outqueue)) {
event = sctp_ulpevent_make_sender_dry_event(asoc,
GFP_USER | __GFP_NOWARN);
if (!event) {
retval = -ENOMEM;
goto out;
}
if (!event)
return -ENOMEM;
asoc->stream.si->enqueue_event(&asoc->ulpq, event);
}
}
out:
return 0;
}
static int sctp_setsockopt_event(struct sock *sk, char __user *optval,
unsigned int optlen)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_association *asoc;
struct sctp_event param;
int retval = 0;
if (optlen < sizeof(param))
return -EINVAL;
optlen = sizeof(param);
if (copy_from_user(&param, optval, optlen))
return -EFAULT;
if (param.se_type < SCTP_SN_TYPE_BASE ||
param.se_type > SCTP_SN_TYPE_MAX)
return -EINVAL;
asoc = sctp_id2assoc(sk, param.se_assoc_id);
if (!asoc && param.se_assoc_id > SCTP_ALL_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
if (asoc)
return sctp_assoc_ulpevent_type_set(&param, asoc);
if (param.se_assoc_id == SCTP_FUTURE_ASSOC ||
param.se_assoc_id == SCTP_ALL_ASSOC)
sctp_ulpevent_type_set(&sp->subscribe,
param.se_type, param.se_on);
if (param.se_assoc_id == SCTP_CURRENT_ASSOC ||
param.se_assoc_id == SCTP_ALL_ASSOC) {
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
int ret = sctp_assoc_ulpevent_type_set(&param, asoc);
if (ret && !retval)
retval = ret;
}
}
return retval;
}
@ -7696,6 +7711,10 @@ static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
return -EINVAL;
asoc = sctp_id2assoc(sk, param.se_assoc_id);
if (!asoc && param.se_assoc_id != SCTP_FUTURE_ASSOC &&
sctp_style(sk, UDP))
return -EINVAL;
subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);