diff options
| author | Daniel Borkmann <dborkman@redhat.com> | 2014-07-12 22:30:40 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-17 01:40:04 +0400 |
| commit | bbbea41d5e53335fd81e89c728f71b14386f336e (patch) | |
| tree | d8db0a4ffa2ba2d32807597e9b30865e1cced7e8 | |
| parent | 6b3fd5f3a2bbc8464a8e0bf134a183b8fa026439 (diff) | |
| download | linux-bbbea41d5e53335fd81e89c728f71b14386f336e.tar.xz | |
net: sctp: deprecate rfc6458, 5.3.2. SCTP_SNDRCV support
With support of SCTP_SNDINFO/SCTP_RCVINFO as described in RFC6458,
5.3.4/5.3.5, we can now deprecate SCTP_SNDRCV. The RFC already
declares it as deprecated:
This structure mixes the send and receive path. SCTP_SNDINFO
(described in Section 5.3.4) and SCTP_RCVINFO (described in
Section 5.3.5) split this information. These structures should
be used, when possible, since SCTP_SNDRCV is deprecated.
So whenever a user tries to subscribe to sctp_data_io_event via
setsockopt(2) which triggers inclusion of SCTP_SNDRCV cmsg_type,
issue a warning in the log.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sctp/socket.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index d95a50c013c9..743308f40544 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2205,8 +2205,13 @@ static int sctp_setsockopt_events(struct sock *sk, char __user *optval, if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen)) return -EFAULT; - /* - * At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, + if (sctp_sk(sk)->subscribe.sctp_data_io_event) + pr_warn_ratelimited(DEPRECATED "%s (pid %d) " + "Requested SCTP_SNDRCVINFO event.\n" + "Use SCTP_RCVINFO through SCTP_RECVRCVINFO option instead.\n", + current->comm, task_pid_nr(current)); + + /* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, * if there is no data to be sent or retransmit, the stack will * immediately send up this notification. */ |