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authorWei Yongjun <yjwei@cn.fujitsu.com>2008-12-25 16:57:24 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-25 16:57:24 -0800
commitaea3c5c05d2c409e93bfa80dcedc06af7da6c13b (patch)
tree2ee271efa68ef7677c94b1c9daaa33b9ad6a2531 /net
parentea686a2653c5586b1c7192958b9d521abde66e92 (diff)
downloadlinux-2.6.34-ux500-aea3c5c05d2c409e93bfa80dcedc06af7da6c13b.tar.gz
sctp: Implement socket option SCTP_GET_ASSOC_NUMBER
Implement socket option SCTP_GET_ASSOC_NUMBER of the latest ietf socket extensions API draft. 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER) This option gets the current number of associations that are attached to a one-to-many style socket. The option value is an uint32_t. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/socket.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index e432927310c..9f5fe23773a 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -5460,6 +5460,38 @@ num:
return 0;
}
+/*
+ * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
+ * This option gets the current number of associations that are attached
+ * to a one-to-many style socket. The option value is an uint32_t.
+ */
+static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ struct sctp_sock *sp = sctp_sk(sk);
+ struct sctp_association *asoc;
+ u32 val = 0;
+
+ if (sctp_style(sk, TCP))
+ return -EOPNOTSUPP;
+
+ if (len < sizeof(u32))
+ return -EINVAL;
+
+ len = sizeof(u32);
+
+ list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
+ val++;
+ }
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -5602,6 +5634,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
optlen);
break;
+ case SCTP_GET_ASSOC_NUMBER:
+ retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;