Bluetooth: Store address information in L2CAP channel structure
With the effort of abstracting the L2CAP socket from the underlying L2CAP channel it is important to store the source and destination address information directly in the L2CAP channel structure. Direct access to the HCI connection address information is not possible since they might not be avaiable at L2CAP channel creation time. The address information will be updated when the underlying BR/EDR or LE connection status changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann
Johan Hedberg
Родитель
4637f7c0d0
Коммит
7eafc59e2f
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@ -444,6 +444,8 @@ struct l2cap_chan {
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__u8 state;
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bdaddr_t dst;
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bdaddr_t src;
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__le16 psm;
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__u16 dcid;
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__u16 scid;
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@ -149,7 +149,7 @@ static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src)
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struct l2cap_chan *c;
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list_for_each_entry(c, &chan_list, global_l) {
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if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src))
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if (c->sport == psm && !bacmp(&c->src, src))
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return c;
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}
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return NULL;
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@ -621,10 +621,8 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
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void l2cap_chan_close(struct l2cap_chan *chan, int reason)
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{
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struct l2cap_conn *conn = chan->conn;
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struct sock *sk = chan->sk;
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BT_DBG("chan %p state %s sk %p", chan, state_to_string(chan->state),
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sk);
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BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
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switch (chan->state) {
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case BT_LISTEN:
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@ -635,6 +633,7 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
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case BT_CONFIG:
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if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED &&
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conn->hcon->type == ACL_LINK) {
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struct sock *sk = chan->sk;
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__set_chan_timer(chan, sk->sk_sndtimeo);
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l2cap_send_disconn_req(chan, reason);
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} else
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@ -644,6 +643,7 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
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case BT_CONNECT2:
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if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED &&
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conn->hcon->type == ACL_LINK) {
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struct sock *sk = chan->sk;
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struct l2cap_conn_rsp rsp;
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__u16 result;
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@ -1257,8 +1257,6 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
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mutex_lock(&conn->chan_lock);
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list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) {
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struct sock *sk = chan->sk;
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l2cap_chan_lock(chan);
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if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
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@ -1284,6 +1282,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
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l2cap_start_connection(chan);
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} else if (chan->state == BT_CONNECT2) {
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struct sock *sk = chan->sk;
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struct l2cap_conn_rsp rsp;
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char buf[128];
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rsp.scid = cpu_to_le16(chan->dcid);
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@ -1341,8 +1340,6 @@ static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid,
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read_lock(&chan_list_lock);
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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if (state && c->state != state)
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continue;
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@ -1351,16 +1348,16 @@ static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid,
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int src_any, dst_any;
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/* Exact match. */
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src_match = !bacmp(&bt_sk(sk)->src, src);
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dst_match = !bacmp(&bt_sk(sk)->dst, dst);
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src_match = !bacmp(&c->src, src);
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dst_match = !bacmp(&c->dst, dst);
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if (src_match && dst_match) {
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read_unlock(&chan_list_lock);
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return c;
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}
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/* Closest match */
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src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY);
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dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY);
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src_any = !bacmp(&c->src, BDADDR_ANY);
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dst_any = !bacmp(&c->dst, BDADDR_ANY);
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if ((src_match && dst_any) || (src_any && dst_match) ||
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(src_any && dst_any))
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c1 = c;
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@ -1399,8 +1396,8 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn)
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chan->dcid = L2CAP_CID_ATT;
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bacpy(&bt_sk(chan->sk)->src, &conn->hcon->src);
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bacpy(&bt_sk(chan->sk)->dst, &conn->hcon->dst);
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bacpy(&chan->src, &conn->hcon->src);
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bacpy(&chan->dst, &conn->hcon->dst);
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__l2cap_chan_add(conn, chan);
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@ -1721,8 +1718,6 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
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read_lock(&chan_list_lock);
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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if (state && c->state != state)
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continue;
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@ -1731,16 +1726,16 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
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int src_any, dst_any;
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/* Exact match. */
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src_match = !bacmp(&bt_sk(sk)->src, src);
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dst_match = !bacmp(&bt_sk(sk)->dst, dst);
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src_match = !bacmp(&c->src, src);
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dst_match = !bacmp(&c->dst, dst);
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if (src_match && dst_match) {
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read_unlock(&chan_list_lock);
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return c;
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}
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/* Closest match */
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src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY);
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dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY);
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src_any = !bacmp(&c->src, BDADDR_ANY);
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dst_any = !bacmp(&c->dst, BDADDR_ANY);
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if ((src_match && dst_any) || (src_any && dst_match) ||
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(src_any && dst_any))
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c1 = c;
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@ -1762,10 +1757,10 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
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__u8 auth_type;
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int err;
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BT_DBG("%pMR -> %pMR (type %u) psm 0x%2.2x", &bt_sk(sk)->src, dst,
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BT_DBG("%pMR -> %pMR (type %u) psm 0x%2.2x", &chan->src, dst,
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dst_type, __le16_to_cpu(psm));
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hdev = hci_get_route(dst, &bt_sk(sk)->src);
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hdev = hci_get_route(dst, &chan->src);
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if (!hdev)
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return -EHOSTUNREACH;
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@ -1822,9 +1817,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
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}
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/* Set destination address and psm */
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lock_sock(sk);
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bacpy(&bt_sk(sk)->dst, dst);
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release_sock(sk);
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bacpy(&chan->dst, dst);
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chan->psm = psm;
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chan->dcid = cid;
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@ -1857,9 +1850,7 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
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}
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/* Update source addr of the socket */
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lock_sock(sk);
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bacpy(&bt_sk(sk)->src, &hcon->src);
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release_sock(sk);
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bacpy(&chan->src, &hcon->src);
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l2cap_chan_unlock(chan);
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l2cap_chan_add(conn, chan);
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@ -3798,8 +3789,8 @@ static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
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*/
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conn->hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
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bacpy(&bt_sk(sk)->src, &conn->hcon->src);
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bacpy(&bt_sk(sk)->dst, &conn->hcon->dst);
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bacpy(&chan->src, &conn->hcon->src);
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bacpy(&chan->dst, &conn->hcon->dst);
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chan->psm = psm;
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chan->dcid = scid;
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chan->local_amp_id = amp_id;
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@ -6542,17 +6533,15 @@ int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr)
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/* Find listening sockets and check their link_mode */
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read_lock(&chan_list_lock);
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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if (c->state != BT_LISTEN)
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continue;
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if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) {
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if (!bacmp(&c->src, &hdev->bdaddr)) {
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lm1 |= HCI_LM_ACCEPT;
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if (test_bit(FLAG_ROLE_SWITCH, &c->flags))
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lm1 |= HCI_LM_MASTER;
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exact++;
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} else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) {
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} else if (!bacmp(&c->src, BDADDR_ANY)) {
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lm2 |= HCI_LM_ACCEPT;
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if (test_bit(FLAG_ROLE_SWITCH, &c->flags))
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lm2 |= HCI_LM_MASTER;
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@ -6840,10 +6829,8 @@ static int l2cap_debugfs_show(struct seq_file *f, void *p)
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read_lock(&chan_list_lock);
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list_for_each_entry(c, &chan_list, global_l) {
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struct sock *sk = c->sk;
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seq_printf(f, "%pMR %pMR %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n",
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&bt_sk(sk)->src, &bt_sk(sk)->dst,
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&c->src, &c->dst,
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c->state, __le16_to_cpu(c->psm),
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c->scid, c->dcid, c->imtu, c->omtu,
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c->sec_level, c->mode);
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@ -112,7 +112,7 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
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break;
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}
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bacpy(&bt_sk(sk)->src, &la.l2_bdaddr);
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bacpy(&chan->src, &la.l2_bdaddr);
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chan->state = BT_BOUND;
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sk->sk_state = BT_BOUND;
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@ -274,11 +274,11 @@ static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr,
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if (peer) {
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la->l2_psm = chan->psm;
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bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst);
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bacpy(&la->l2_bdaddr, &chan->dst);
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la->l2_cid = cpu_to_le16(chan->dcid);
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} else {
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la->l2_psm = chan->sport;
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bacpy(&la->l2_bdaddr, &bt_sk(sk)->src);
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bacpy(&la->l2_bdaddr, &chan->src);
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la->l2_cid = cpu_to_le16(chan->scid);
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}
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