Bluetooth: Add LE connection support to L2CAP

Add basic LE connection support to L2CAP. LE
connection can be created by specifying cid
in struct sockaddr_l2

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

2 files changed, 23 insertions, 7 deletions

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index a72d6e4eab4f..123c1bfa0ce6 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -593,6 +593,12 @@ static void l2cap_conn_ready(struct l2cap_conn *conn)
         for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
                 bh_lock_sock(sk);
 
+                if (conn->hcon->type == LE_LINK) {
+                        l2cap_sock_clear_timer(sk);
+                        sk->sk_state = BT_CONNECTED;
+                        sk->sk_state_change(sk);
+                }
+
                 if (sk->sk_type != SOCK_SEQPACKET &&
                                 sk->sk_type != SOCK_STREAM) {
                         l2cap_sock_clear_timer(sk);
@@ -651,7 +657,11 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
 
         BT_DBG("hcon %p conn %p", hcon, conn);
 
-        conn->mtu = hcon->hdev->acl_mtu;
+        if (hcon->hdev->le_mtu && hcon->type == LE_LINK)
+                conn->mtu = hcon->hdev->le_mtu;
+        else
+                conn->mtu = hcon->hdev->acl_mtu;
+
         conn->src = &hcon->hdev->bdaddr;
         conn->dst = &hcon->dst;
 
@@ -758,8 +768,13 @@ int l2cap_do_connect(struct sock *sk)
 
         auth_type = l2cap_get_auth_type(sk);
 
-        hcon = hci_connect(hdev, ACL_LINK, dst,
+        if (l2cap_pi(sk)->dcid == L2CAP_CID_LE_DATA)
+                hcon = hci_connect(hdev, LE_LINK, dst,
                                         l2cap_pi(sk)->sec_level, auth_type);
+        else
+                hcon = hci_connect(hdev, ACL_LINK, dst,
+                                        l2cap_pi(sk)->sec_level, auth_type);
+
         if (!hcon)
                 goto done;
 
@@ -3520,7 +3535,7 @@ static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
 
         BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
 
-        if (hcon->type != ACL_LINK)
+        if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK))
                 return -EINVAL;
 
         if (!status) {
@@ -3549,7 +3564,7 @@ static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason)
 {
         BT_DBG("hcon %p reason %d", hcon, reason);
 
-        if (hcon->type != ACL_LINK)
+        if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK))
                 return -EINVAL;
 
         l2cap_conn_del(hcon, bt_err(reason));
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 21f5385ca24d..f45d361e84d1 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -168,13 +168,13 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int al
         len = min_t(unsigned int, sizeof(la), alen);
         memcpy(&la, addr, len);
 
-        if (la.l2_cid)
+        if (la.l2_cid && la.l2_psm)
                 return -EINVAL;
 
         lock_sock(sk);
 
         if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM)
-                        && !la.l2_psm) {
+                        && !(la.l2_psm || la.l2_cid)) {
                 err = -EINVAL;
                 goto done;
         }
@@ -216,7 +216,7 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int al
 
         /* PSM must be odd and lsb of upper byte must be 0 */
         if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 &&
-                sk->sk_type != SOCK_RAW) {
+                                sk->sk_type != SOCK_RAW && !la.l2_cid) {
                 err = -EINVAL;
                 goto done;
         }
@@ -224,6 +224,7 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int al
         /* Set destination address and psm */
         bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr);
         l2cap_pi(sk)->psm = la.l2_psm;
+        l2cap_pi(sk)->dcid = la.l2_cid;
 
         err = l2cap_do_connect(sk);
         if (err)