diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2022-01-06 16:20:18 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-01-07 11:27:07 +0000 |
| commit | 3d1d6d66e15612801bec79b190af746622f0d427 (patch) | |
| tree | 74adcb90a7af8b6d7fdacc5ea37574aee129c14c | |
| parent | 71ba088ce0aa87370b18a1d35cd742f352d51c24 (diff) | |
| download | mac80211-next-3d1d6d66e15612801bec79b190af746622f0d427.tar.gz | |
mptcp: implement support for user-space disconnect
Handle explicitly AF_UNSPEC in mptcp_stream_connnect() to
allow user-space to disconnect established MPTCP connections
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/mptcp/protocol.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 628cd60c9d0f93..667e153e6e240f 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -3404,9 +3404,20 @@ static int mptcp_stream_connect(struct socket *sock, struct sockaddr *uaddr, struct mptcp_sock *msk = mptcp_sk(sock->sk); struct mptcp_subflow_context *subflow; struct socket *ssock; - int err; + int err = -EINVAL; lock_sock(sock->sk); + if (uaddr) { + if (addr_len < sizeof(uaddr->sa_family)) + goto unlock; + + if (uaddr->sa_family == AF_UNSPEC) { + err = mptcp_disconnect(sock->sk, flags); + sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; + goto unlock; + } + } + if (sock->state != SS_UNCONNECTED && msk->subflow) { /* pending connection or invalid state, let existing subflow * cope with that @@ -3416,10 +3427,8 @@ static int mptcp_stream_connect(struct socket *sock, struct sockaddr *uaddr, } ssock = __mptcp_nmpc_socket(msk); - if (!ssock) { - err = -EINVAL; + if (!ssock) goto unlock; - } mptcp_token_destroy(msk); inet_sk_state_store(sock->sk, TCP_SYN_SENT); |