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-rw-r--r--net/sctp/socket.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index dda2f6700f5..f904f2bc0f2 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2892,6 +2892,36 @@ static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
return 0; /* is this the right error code? */
}
+/*
+ * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
+ *
+ * This option will allow a user to change the maximum burst of packets
+ * that can be emitted by this association. Note that the default value
+ * is 4, and some implementations may restrict this setting so that it
+ * can only be lowered.
+ *
+ * NOTE: This text doesn't seem right. Do this on a socket basis with
+ * future associations inheriting the socket value.
+ */
+static int sctp_setsockopt_maxburst(struct sock *sk,
+ char __user *optval,
+ int optlen)
+{
+ int val;
+
+ if (optlen != sizeof(int))
+ return -EINVAL;
+ if (get_user(val, (int __user *)optval))
+ return -EFAULT;
+
+ if (val < 0)
+ return -EINVAL;
+
+ sctp_sk(sk)->max_burst = val;
+
+ return 0;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -3012,6 +3042,9 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_FRAGMENT_INTERLEAVE:
retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
break;
+ case SCTP_MAX_BURST:
+ retval = sctp_setsockopt_maxburst(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
@@ -3171,6 +3204,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
sp->default_timetolive = 0;
sp->default_rcv_context = 0;
+ sp->max_burst = sctp_max_burst;
/* Initialize default setup parameters. These parameters
* can be modified with the SCTP_INITMSG socket option or
@@ -4689,6 +4723,30 @@ static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
return -ENOTSUPP;
}
+/*
+ * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
+ * (chapter and verse is quoted at sctp_setsockopt_maxburst())
+ */
+static int sctp_getsockopt_maxburst(struct sock *sk, int len,
+ char __user *optval,
+ int __user *optlen)
+{
+ int val;
+
+ if (len < sizeof(int))
+ return -EINVAL;
+
+ len = sizeof(int);
+
+ val = sctp_sk(sk)->max_burst;
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &val, len))
+ return -EFAULT;
+
+ return -ENOTSUPP;
+}
+
SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -4809,6 +4867,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
optlen);
break;
+ case SCTP_MAX_BURST:
+ retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;