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| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2008-12-26 03:57:24 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-26 03:57:24 +0300 |
| commit | aea3c5c05d2c409e93bfa80dcedc06af7da6c13b (patch) | |
| tree | 2ee271efa68ef7677c94b1c9daaa33b9ad6a2531 /net/sctp/socket.c | |
| parent | ea686a2653c5586b1c7192958b9d521abde66e92 (diff) | |
| download | linux-aea3c5c05d2c409e93bfa80dcedc06af7da6c13b.tar.xz | |
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/sctp/socket.c')
| -rw-r--r-- | net/sctp/socket.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index e432927310c9..9f5fe23773a9 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; |