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authorXin Long <lucien.xin@gmail.com>2019-08-26 11:30:04 +0300
committerDavid S. Miller <davem@davemloft.net>2019-08-28 06:54:14 +0300
commitd5886b919a720ff859aebf569cb0f353b1d977a6 (patch)
tree8817b65f830a249e7d919d73d6c4f1ea19b3cb7f /net/sctp
parent2f5268a9249b87d49ab3c7050f99064e6d1a8bb0 (diff)
downloadlinux-d5886b919a720ff859aebf569cb0f353b1d977a6.tar.xz
sctp: allow users to set ep ecn flag by sockopt
SCTP_ECN_SUPPORTED sockopt will be added to allow users to change ep ecn flag, and it's similar with other feature flags. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 82bc25223cfe..3e50a9712fb1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4560,6 +4560,34 @@ out:
return retval;
}
+static int sctp_setsockopt_ecn_supported(struct sock *sk,
+ char __user *optval,
+ unsigned int optlen)
+{
+ struct sctp_assoc_value params;
+ struct sctp_association *asoc;
+ int retval = -EINVAL;
+
+ if (optlen != sizeof(params))
+ goto out;
+
+ if (copy_from_user(&params, optval, optlen)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
+ sctp_style(sk, UDP))
+ goto out;
+
+ sctp_sk(sk)->ep->ecn_enable = !!params.assoc_value;
+ retval = 0;
+
+out:
+ return retval;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -4766,6 +4794,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_AUTH_SUPPORTED:
retval = sctp_setsockopt_auth_supported(sk, optval, optlen);
break;
+ case SCTP_ECN_SUPPORTED:
+ retval = sctp_setsockopt_ecn_supported(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
@@ -7828,6 +7859,45 @@ out:
return retval;
}
+static int sctp_getsockopt_ecn_supported(struct sock *sk, int len,
+ char __user *optval,
+ int __user *optlen)
+{
+ struct sctp_assoc_value params;
+ struct sctp_association *asoc;
+ int retval = -EFAULT;
+
+ if (len < sizeof(params)) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ len = sizeof(params);
+ if (copy_from_user(&params, optval, len))
+ goto out;
+
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
+ sctp_style(sk, UDP)) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ params.assoc_value = asoc ? asoc->peer.ecn_capable
+ : sctp_sk(sk)->ep->ecn_enable;
+
+ if (put_user(len, optlen))
+ goto out;
+
+ if (copy_to_user(optval, &params, len))
+ goto out;
+
+ retval = 0;
+
+out:
+ return retval;
+}
+
static int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -8037,6 +8107,9 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_auth_supported(sk, len, optval,
optlen);
break;
+ case SCTP_ECN_SUPPORTED:
+ retval = sctp_getsockopt_ecn_supported(sk, len, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;