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Bluetooth: Return the correct address type for L2CAP sockets

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The L2CAP sockets can use BR/EDR public, LE public and LE random
addresses for various combinations of source and destination
devices. So make sure that getsockname(), getpeername() and
accept() return the correct address type.

For this the address type of the source and destination is stored
with the L2CAP channel information. The stored address type is
not the one specific for the HCI protocol. It is the address
type used for the L2CAP sockets and the management interface.

The underlying HCI connections store the HCI address type. If
needed, it gets converted to the socket address type.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2013-10-13 08:50:41 -07:00 committed by Johan Hedberg
parent 7eafc59e2f
commit 4f1654e084
3 changed files with 24 additions and 2 deletions
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5
include/net/bluetooth/l2cap.h
View File

@ -445,8 +445,11 @@ struct l2cap_chan {
__u8 state;
bdaddr_t dst;
__u8 dst_type;
bdaddr_t src;
__u8 src_type;
__le16 psm;
__le16 sport;
__u16 dcid;
__u16 scid;
@ -457,8 +460,6 @@ struct l2cap_chan {
__u8 chan_type;
__u8 chan_policy;
__le16 sport;
__u8 sec_level;
__u8 ident;

18
net/bluetooth/l2cap_core.c
View File

@ -59,6 +59,18 @@ static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err);
static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
struct sk_buff_head *skbs, u8 event);
static inline __u8 bdaddr_type(struct hci_conn *hcon, __u8 type)
{
if (hcon->type == LE_LINK) {
if (type == ADDR_LE_DEV_PUBLIC)
return BDADDR_LE_PUBLIC;
else
return BDADDR_LE_RANDOM;
}
return BDADDR_BREDR;
}
/* ---- L2CAP channels ---- */
static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn,
@ -1398,6 +1410,8 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn)
bacpy(&chan->src, &conn->hcon->src);
bacpy(&chan->dst, &conn->hcon->dst);
chan->src_type = bdaddr_type(conn->hcon, conn->hcon->src_type);
chan->dst_type = bdaddr_type(conn->hcon, conn->hcon->dst_type);
__l2cap_chan_add(conn, chan);
@ -1818,6 +1832,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
/* Set destination address and psm */
bacpy(&chan->dst, dst);
chan->dst_type = dst_type;
chan->psm = psm;
chan->dcid = cid;
@ -1851,6 +1866,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
/* Update source addr of the socket */
bacpy(&chan->src, &hcon->src);
chan->src_type = bdaddr_type(hcon, hcon->src_type);
l2cap_chan_unlock(chan);
l2cap_chan_add(conn, chan);
@ -3791,6 +3807,8 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
bacpy(&chan->src, &conn->hcon->src);
bacpy(&chan->dst, &conn->hcon->dst);
chan->src_type = bdaddr_type(conn->hcon, conn->hcon->src_type);
chan->dst_type = bdaddr_type(conn->hcon, conn->hcon->dst_type);
chan->psm = psm;
chan->dcid = scid;
chan->local_amp_id = amp_id;

3
net/bluetooth/l2cap_sock.c
View File

@ -113,6 +113,7 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
}
bacpy(&chan->src, &la.l2_bdaddr);
chan->src_type = la.l2_bdaddr_type;
chan->state = BT_BOUND;
sk->sk_state = BT_BOUND;
@ -276,10 +277,12 @@ static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr,
la->l2_psm = chan->psm;
bacpy(&la->l2_bdaddr, &chan->dst);
la->l2_cid = cpu_to_le16(chan->dcid);
la->l2_bdaddr_type = chan->dst_type;
} else {
la->l2_psm = chan->sport;
bacpy(&la->l2_bdaddr, &chan->src);
la->l2_cid = cpu_to_le16(chan->scid);
la->l2_bdaddr_type = chan->src_type;
}
return 0;