From 21626e6214f92aaae580052c760dc85f83b5faef Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Fri, 24 Jan 2014 10:35:41 +0200 Subject: [PATCH] Bluetooth: Switch ATT channels to use L2CAP_CHAN_FIXED ATT channels are not connection oriented so having them use L2CAP_CHAN_CONN_ORIENTED is quite confusing. Instead, use the new L2CAP_CHAN_FIXED type and ensure that the MTU and CID values get properly set. Signed-off-by: Johan Hedberg Signed-off-by: Marcel Holtmann --- net/bluetooth/l2cap_core.c | 21 +++++++++------------ net/bluetooth/l2cap_sock.c | 9 +++++++++ 2 files changed, 18 insertions(+), 12 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index cd28057d2903..e5c5c7427c41 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -498,18 +498,10 @@ void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) switch (chan->chan_type) { case L2CAP_CHAN_CONN_ORIENTED: - if (conn->hcon->type == LE_LINK) { - if (chan->dcid == L2CAP_CID_ATT) { - chan->omtu = L2CAP_DEFAULT_MTU; - chan->scid = L2CAP_CID_ATT; - } else { - chan->scid = l2cap_alloc_cid(conn); - } - } else { - /* Alloc CID for connection-oriented socket */ - chan->scid = l2cap_alloc_cid(conn); + /* Alloc CID for connection-oriented socket */ + chan->scid = l2cap_alloc_cid(conn); + if (conn->hcon->type == ACL_LINK) chan->omtu = L2CAP_DEFAULT_MTU; - } break; case L2CAP_CHAN_CONN_LESS: @@ -7025,7 +7017,12 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, goto done; } - if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !(psm || cid)) { + if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !psm) { + err = -EINVAL; + goto done; + } + + if (chan->chan_type == L2CAP_CHAN_FIXED && !cid) { err = -EINVAL; goto done; } diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index fe086b4efc0c..04abd26a3466 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -101,6 +101,15 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) return -EINVAL; + if (la.l2_cid) { + /* When the socket gets created it defaults to + * CHAN_CONN_ORIENTED, so we need to overwrite the + * default here. + */ + chan->chan_type = L2CAP_CHAN_FIXED; + chan->omtu = L2CAP_DEFAULT_MTU; + } + if (bdaddr_type_is_le(la.l2_bdaddr_type)) { if (!enable_lecoc && la.l2_psm) return -EINVAL; -- GitLab