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sctp: factor out sctp_sendmsg_check_sflags from sctp_sendmsg

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This patch is to move the codes for checking sinfo_flags on one asoc
after this asoc has been found into sctp_sendmsg_check_sflags.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2018-03-01 23:05:12 +08:00 committed by David S. Miller
parent 2bfd80f9ed
commit c2666de1fd
1 changed files with 36 additions and 36 deletions
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72
net/sctp/socket.c
View file

@ -1687,6 +1687,39 @@ static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
return err;
}
static int sctp_sendmsg_check_sflags(struct sctp_association *asoc,
__u16 sflags, struct msghdr *msg,
size_t msg_len)
{
struct sock *sk = asoc->base.sk;
struct net *net = sock_net(sk);
if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP))
return -EPIPE;
if (sflags & SCTP_EOF) {
pr_debug("%s: shutting down association:%p\n", __func__, asoc);
sctp_primitive_SHUTDOWN(net, asoc, NULL);
return 0;
}
if (sflags & SCTP_ABORT) {
struct sctp_chunk *chunk;
chunk = sctp_make_abort_user(asoc, msg, msg_len);
if (!chunk)
return -ENOMEM;
pr_debug("%s: aborting association:%p\n", __func__, asoc);
sctp_primitive_ABORT(net, asoc, chunk);
return 0;
}
return 1;
}
static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
struct msghdr *msg, size_t msg_len,
struct sctp_transport *transport,
@ -1783,12 +1816,10 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
{
struct net *net = sock_net(sk);
struct sctp_sock *sp;
struct sctp_endpoint *ep;
struct sctp_association *new_asoc = NULL, *asoc = NULL;
struct sctp_transport *transport, *chunk_tp;
struct sctp_chunk *chunk;
union sctp_addr to;
struct sockaddr *msg_name = NULL;
struct sctp_sndrcvinfo default_sinfo;
@ -1906,41 +1937,10 @@ static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
}
if (asoc) {
pr_debug("%s: just looked up association:%p\n", __func__, asoc);
/* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED
* socket that has an association in CLOSED state. This can
* happen when an accepted socket has an association that is
* already CLOSED.
*/
if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) {
err = -EPIPE;
err = sctp_sendmsg_check_sflags(asoc, sinfo_flags, msg,
msg_len);
if (err <= 0)
goto out_unlock;
}
if (sinfo_flags & SCTP_EOF) {
pr_debug("%s: shutting down association:%p\n",
__func__, asoc);
sctp_primitive_SHUTDOWN(net, asoc, NULL);
err = 0;
goto out_unlock;
}
if (sinfo_flags & SCTP_ABORT) {
chunk = sctp_make_abort_user(asoc, msg, msg_len);
if (!chunk) {
err = -ENOMEM;
goto out_unlock;
}
pr_debug("%s: aborting association:%p\n",
__func__, asoc);
sctp_primitive_ABORT(net, asoc, chunk);
err = 0;
goto out_unlock;
}
}
/* Do we need to create the association? */