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-rw-r--r--net/sctp/socket.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index adb5ee62c2a..fc04d185fa3 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2214,6 +2214,109 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
return 0;
}
+/* 7.1.24. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
+ *
+ * This options will get or set the delayed ack timer. The time is set
+ * in milliseconds. If the assoc_id is 0, then this sets or gets the
+ * endpoints default delayed ack timer value. If the assoc_id field is
+ * non-zero, then the set or get effects the specified association.
+ *
+ * struct sctp_assoc_value {
+ * sctp_assoc_t assoc_id;
+ * uint32_t assoc_value;
+ * };
+ *
+ * assoc_id - This parameter, indicates which association the
+ * user is preforming an action upon. Note that if
+ * this field's value is zero then the endpoints
+ * default value is changed (effecting future
+ * associations only).
+ *
+ * assoc_value - This parameter contains the number of milliseconds
+ * that the user is requesting the delayed ACK timer
+ * be set to. Note that this value is defined in
+ * the standard to be between 200 and 500 milliseconds.
+ *
+ * Note: a value of zero will leave the value alone,
+ * but disable SACK delay. A non-zero value will also
+ * enable SACK delay.
+ */
+
+static int sctp_setsockopt_delayed_ack_time(struct sock *sk,
+ char __user *optval, int optlen)
+{
+ struct sctp_assoc_value params;
+ struct sctp_transport *trans = NULL;
+ struct sctp_association *asoc = NULL;
+ struct sctp_sock *sp = sctp_sk(sk);
+
+ if (optlen != sizeof(struct sctp_assoc_value))
+ return - EINVAL;
+
+ if (copy_from_user(&params, optval, optlen))
+ return -EFAULT;
+
+ /* Validate value parameter. */
+ if (params.assoc_value > 500)
+ 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.
+ */
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc && params.assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ if (params.assoc_value) {
+ if (asoc) {
+ asoc->sackdelay =
+ msecs_to_jiffies(params.assoc_value);
+ asoc->param_flags =
+ (asoc->param_flags & ~SPP_SACKDELAY) |
+ SPP_SACKDELAY_ENABLE;
+ } else {
+ sp->sackdelay = params.assoc_value;
+ sp->param_flags =
+ (sp->param_flags & ~SPP_SACKDELAY) |
+ SPP_SACKDELAY_ENABLE;
+ }
+ } else {
+ if (asoc) {
+ asoc->param_flags =
+ (asoc->param_flags & ~SPP_SACKDELAY) |
+ SPP_SACKDELAY_DISABLE;
+ } else {
+ sp->param_flags =
+ (sp->param_flags & ~SPP_SACKDELAY) |
+ SPP_SACKDELAY_DISABLE;
+ }
+ }
+
+ /* If change is for association, also apply to each transport. */
+ if (asoc) {
+ struct list_head *pos;
+
+ list_for_each(pos, &asoc->peer.transport_addr_list) {
+ trans = list_entry(pos, struct sctp_transport,
+ transports);
+ if (params.assoc_value) {
+ trans->sackdelay =
+ msecs_to_jiffies(params.assoc_value);
+ trans->param_flags =
+ (trans->param_flags & ~SPP_SACKDELAY) |
+ SPP_SACKDELAY_ENABLE;
+ } else {
+ trans->param_flags =
+ (trans->param_flags & ~SPP_SACKDELAY) |
+ SPP_SACKDELAY_DISABLE;
+ }
+ }
+ }
+
+ return 0;
+}
+
/* 7.1.3 Initialization Parameters (SCTP_INITMSG)
*
* Applications can specify protocol parameters for the default association
@@ -2660,6 +2763,10 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen);
break;
+ case SCTP_DELAYED_ACK_TIME:
+ retval = sctp_setsockopt_delayed_ack_time(sk, optval, optlen);
+ break;
+
case SCTP_INITMSG:
retval = sctp_setsockopt_initmsg(sk, optval, optlen);
break;
@@ -3417,6 +3524,79 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
return 0;
}
+/* 7.1.24. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
+ *
+ * This options will get or set the delayed ack timer. The time is set
+ * in milliseconds. If the assoc_id is 0, then this sets or gets the
+ * endpoints default delayed ack timer value. If the assoc_id field is
+ * non-zero, then the set or get effects the specified association.
+ *
+ * struct sctp_assoc_value {
+ * sctp_assoc_t assoc_id;
+ * uint32_t assoc_value;
+ * };
+ *
+ * assoc_id - This parameter, indicates which association the
+ * user is preforming an action upon. Note that if
+ * this field's value is zero then the endpoints
+ * default value is changed (effecting future
+ * associations only).
+ *
+ * assoc_value - This parameter contains the number of milliseconds
+ * that the user is requesting the delayed ACK timer
+ * be set to. Note that this value is defined in
+ * the standard to be between 200 and 500 milliseconds.
+ *
+ * Note: a value of zero will leave the value alone,
+ * but disable SACK delay. A non-zero value will also
+ * enable SACK delay.
+ */
+static int sctp_getsockopt_delayed_ack_time(struct sock *sk, int len,
+ char __user *optval,
+ int __user *optlen)
+{
+ struct sctp_assoc_value params;
+ struct sctp_association *asoc = NULL;
+ struct sctp_sock *sp = sctp_sk(sk);
+
+ if (len != sizeof(struct sctp_assoc_value))
+ return - EINVAL;
+
+ if (copy_from_user(&params, optval, len))
+ return -EFAULT;
+
+ /* 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.
+ */
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc && params.assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ if (asoc) {
+ /* Fetch association values. */
+ if (asoc->param_flags & SPP_SACKDELAY_ENABLE)
+ params.assoc_value = jiffies_to_msecs(
+ asoc->sackdelay);
+ else
+ params.assoc_value = 0;
+ } else {
+ /* Fetch socket values. */
+ if (sp->param_flags & SPP_SACKDELAY_ENABLE)
+ params.assoc_value = sp->sackdelay;
+ else
+ params.assoc_value = 0;
+ }
+
+ if (copy_to_user(optval, &params, len))
+ return -EFAULT;
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+
+ return 0;
+}
+
/* 7.1.3 Initialization Parameters (SCTP_INITMSG)
*
* Applications can specify protocol parameters for the default association
@@ -4274,6 +4454,10 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
optlen);
break;
+ case SCTP_DELAYED_ACK_TIME:
+ retval = sctp_getsockopt_delayed_ack_time(sk, len, optval,
+ optlen);
+ break;
case SCTP_INITMSG:
retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
break;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 18:03:22 +0000