diff options
author | Xin Long <lucien.xin@gmail.com> | 2018-11-18 11:08:54 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-11-19 23:25:43 +0300 |
commit | 480ba9c18a27ff77b02a2012e50dfd3e20ee9f7a (patch) | |
tree | a5cc3e157bb0035b92722d5d888b86a23781ae4a /net/sctp | |
parent | 88ee48c1f3b7092414fb93c3cf0838ba24f62e16 (diff) | |
download | linux-480ba9c18a27ff77b02a2012e50dfd3e20ee9f7a.tar.xz |
sctp: add sockopt SCTP_EVENT
This patch adds sockopt SCTP_EVENT described in rfc6525#section-6.2.
With this sockopt users can subscribe to an event from a specified
asoc.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r-- | net/sctp/socket.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index c7718272d69b..e16c090e89f0 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4288,6 +4288,57 @@ static int sctp_setsockopt_reuse_port(struct sock *sk, char __user *optval, return 0; } +static int sctp_setsockopt_event(struct sock *sk, char __user *optval, + unsigned int optlen) +{ + struct sctp_association *asoc; + struct sctp_ulpevent *event; + struct sctp_event param; + int retval = 0; + + if (optlen < sizeof(param)) { + retval = -EINVAL; + goto out; + } + + optlen = sizeof(param); + if (copy_from_user(¶m, optval, optlen)) { + retval = -EFAULT; + goto out; + } + + if (param.se_type < SCTP_SN_TYPE_BASE || + param.se_type > SCTP_SN_TYPE_MAX) { + retval = -EINVAL; + goto out; + } + + asoc = sctp_id2assoc(sk, param.se_assoc_id); + if (!asoc) { + sctp_ulpevent_type_set(&sctp_sk(sk)->subscribe, + param.se_type, param.se_on); + goto out; + } + + sctp_ulpevent_type_set(&asoc->subscribe, param.se_type, param.se_on); + + if (param.se_type == SCTP_SENDER_DRY_EVENT && param.se_on) { + if (sctp_outq_is_empty(&asoc->outqueue)) { + event = sctp_ulpevent_make_sender_dry_event(asoc, + GFP_USER | __GFP_NOWARN); + if (!event) { + retval = -ENOMEM; + goto out; + } + + asoc->stream.si->enqueue_event(&asoc->ulpq, event); + } + } + +out: + return retval; +} + /* API 6.2 setsockopt(), getsockopt() * * Applications use setsockopt() and getsockopt() to set or retrieve @@ -4485,6 +4536,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, case SCTP_REUSE_PORT: retval = sctp_setsockopt_reuse_port(sk, optval, optlen); break; + case SCTP_EVENT: + retval = sctp_setsockopt_event(sk, optval, optlen); + break; default: retval = -ENOPROTOOPT; break; @@ -7430,6 +7484,37 @@ static int sctp_getsockopt_reuse_port(struct sock *sk, int len, return 0; } +static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval, + int __user *optlen) +{ + struct sctp_association *asoc; + struct sctp_event param; + __u16 subscribe; + + if (len < sizeof(param)) + return -EINVAL; + + len = sizeof(param); + if (copy_from_user(¶m, optval, len)) + return -EFAULT; + + if (param.se_type < SCTP_SN_TYPE_BASE || + param.se_type > SCTP_SN_TYPE_MAX) + return -EINVAL; + + asoc = sctp_id2assoc(sk, param.se_assoc_id); + subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe; + param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type); + + if (put_user(len, optlen)) + return -EFAULT; + + if (copy_to_user(optval, ¶m, len)) + return -EFAULT; + + return 0; +} + static int sctp_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { @@ -7628,6 +7713,9 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname, case SCTP_REUSE_PORT: retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen); break; + case SCTP_EVENT: + retval = sctp_getsockopt_event(sk, len, optval, optlen); + break; default: retval = -ENOPROTOOPT; break; |