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Diffstat (limited to 'net/bluetooth/l2cap.c')
-rw-r--r--net/bluetooth/l2cap.c137
1 files changed, 99 insertions, 38 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 947f8bbb4bb3..5129b88c8e5b 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -54,6 +54,7 @@
#define VERSION "2.14"
static int enable_ertm = 0;
+static int max_transmit = L2CAP_DEFAULT_MAX_TX;
static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN;
static u8 l2cap_fixed_chan[8] = { 0x02, };
@@ -373,6 +374,8 @@ static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control)
else
control |= L2CAP_SUPER_RCV_READY;
+ control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+
return l2cap_send_sframe(pi, control);
}
@@ -819,7 +822,8 @@ static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int p
return sk;
}
-static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol)
+static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
{
struct sock *sk;
@@ -831,7 +835,7 @@ static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol)
sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
return -ESOCKTNOSUPPORT;
- if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW))
+ if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
return -EPERM;
sock->ops = &l2cap_sock_ops;
@@ -1332,7 +1336,7 @@ static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq)
tx_skb = skb_clone(skb, GFP_ATOMIC);
bt_cb(skb)->retries++;
control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
- control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT)
+ control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT)
| (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
@@ -1361,8 +1365,8 @@ static int l2cap_ertm_send(struct sock *sk)
if (pi->conn_state & L2CAP_CONN_WAIT_F)
return 0;
- while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))
- && !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) {
+ while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) &&
+ !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) {
tx_skb = skb_clone(skb, GFP_ATOMIC);
if (pi->remote_max_tx &&
@@ -1374,7 +1378,7 @@ static int l2cap_ertm_send(struct sock *sk)
bt_cb(skb)->retries++;
control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
- control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT)
+ control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT)
| (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
@@ -1603,8 +1607,8 @@ static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct ms
return -EOPNOTSUPP;
/* Check outgoing MTU */
- if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC
- && len > pi->omtu)
+ if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC &&
+ len > pi->omtu)
return -EINVAL;
lock_sock(sk);
@@ -2172,6 +2176,21 @@ static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
*ptr += L2CAP_CONF_OPT_SIZE + len;
}
+static inline void l2cap_ertm_init(struct sock *sk)
+{
+ l2cap_pi(sk)->expected_ack_seq = 0;
+ l2cap_pi(sk)->unacked_frames = 0;
+ l2cap_pi(sk)->buffer_seq = 0;
+ l2cap_pi(sk)->num_to_ack = 0;
+
+ setup_timer(&l2cap_pi(sk)->retrans_timer,
+ l2cap_retrans_timeout, (unsigned long) sk);
+ setup_timer(&l2cap_pi(sk)->monitor_timer,
+ l2cap_monitor_timeout, (unsigned long) sk);
+
+ __skb_queue_head_init(SREJ_QUEUE(sk));
+}
+
static int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
{
u32 local_feat_mask = l2cap_feat_mask;
@@ -2235,7 +2254,7 @@ done:
case L2CAP_MODE_ERTM:
rfc.mode = L2CAP_MODE_ERTM;
rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW;
- rfc.max_transmit = L2CAP_DEFAULT_MAX_TX;
+ rfc.max_transmit = max_transmit;
rfc.retrans_timeout = 0;
rfc.monitor_timeout = 0;
rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
@@ -2755,22 +2774,18 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
goto unlock;
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
- if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV)
- || l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
+ if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) ||
+ l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
sk->sk_state = BT_CONNECTED;
- l2cap_pi(sk)->next_tx_seq = 0;
- l2cap_pi(sk)->expected_ack_seq = 0;
- l2cap_pi(sk)->unacked_frames = 0;
-
- setup_timer(&l2cap_pi(sk)->retrans_timer,
- l2cap_retrans_timeout, (unsigned long) sk);
- setup_timer(&l2cap_pi(sk)->monitor_timer,
- l2cap_monitor_timeout, (unsigned long) sk);
+ l2cap_pi(sk)->next_tx_seq = 0;
+ l2cap_pi(sk)->expected_tx_seq = 0;
__skb_queue_head_init(TX_QUEUE(sk));
- __skb_queue_head_init(SREJ_QUEUE(sk));
+ if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
+ l2cap_ertm_init(sk);
+
l2cap_chan_ready(sk);
goto unlock;
}
@@ -2844,16 +2859,17 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE;
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) {
- if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV)
- || l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
+ if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) ||
+ l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
sk->sk_state = BT_CONNECTED;
+ l2cap_pi(sk)->next_tx_seq = 0;
l2cap_pi(sk)->expected_tx_seq = 0;
- l2cap_pi(sk)->buffer_seq = 0;
- l2cap_pi(sk)->num_to_ack = 0;
__skb_queue_head_init(TX_QUEUE(sk));
- __skb_queue_head_init(SREJ_QUEUE(sk));
+ if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
+ l2cap_ertm_init(sk);
+
l2cap_chan_ready(sk);
}
@@ -2885,9 +2901,12 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd
sk->sk_shutdown = SHUTDOWN_MASK;
skb_queue_purge(TX_QUEUE(sk));
- skb_queue_purge(SREJ_QUEUE(sk));
- del_timer(&l2cap_pi(sk)->retrans_timer);
- del_timer(&l2cap_pi(sk)->monitor_timer);
+
+ if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) {
+ skb_queue_purge(SREJ_QUEUE(sk));
+ del_timer(&l2cap_pi(sk)->retrans_timer);
+ del_timer(&l2cap_pi(sk)->monitor_timer);
+ }
l2cap_chan_del(sk, ECONNRESET);
bh_unlock_sock(sk);
@@ -2912,9 +2931,12 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd
return 0;
skb_queue_purge(TX_QUEUE(sk));
- skb_queue_purge(SREJ_QUEUE(sk));
- del_timer(&l2cap_pi(sk)->retrans_timer);
- del_timer(&l2cap_pi(sk)->monitor_timer);
+
+ if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) {
+ skb_queue_purge(SREJ_QUEUE(sk));
+ del_timer(&l2cap_pi(sk)->retrans_timer);
+ del_timer(&l2cap_pi(sk)->monitor_timer);
+ }
l2cap_chan_del(sk, 0);
bh_unlock_sock(sk);
@@ -3279,12 +3301,16 @@ static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, str
{
struct l2cap_pinfo *pi = l2cap_pi(sk);
u8 tx_seq = __get_txseq(rx_control);
+ u8 req_seq = __get_reqseq(rx_control);
u16 tx_control = 0;
u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT;
int err = 0;
BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
+ pi->expected_ack_seq = req_seq;
+ l2cap_drop_acked_frames(sk);
+
if (tx_seq == pi->expected_tx_seq)
goto expected;
@@ -3339,6 +3365,16 @@ expected:
return 0;
}
+ if (rx_control & L2CAP_CTRL_FINAL) {
+ if (pi->conn_state & L2CAP_CONN_REJ_ACT)
+ pi->conn_state &= ~L2CAP_CONN_REJ_ACT;
+ else {
+ sk->sk_send_head = TX_QUEUE(sk)->next;
+ pi->next_tx_seq = pi->expected_ack_seq;
+ l2cap_ertm_send(sk);
+ }
+ }
+
pi->buffer_seq = (pi->buffer_seq + 1) % 64;
err = l2cap_sar_reassembly_sdu(sk, skb, rx_control);
@@ -3375,6 +3411,14 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
pi->expected_ack_seq = tx_seq;
l2cap_drop_acked_frames(sk);
+ if (pi->conn_state & L2CAP_CONN_REJ_ACT)
+ pi->conn_state &= ~L2CAP_CONN_REJ_ACT;
+ else {
+ sk->sk_send_head = TX_QUEUE(sk)->next;
+ pi->next_tx_seq = pi->expected_ack_seq;
+ l2cap_ertm_send(sk);
+ }
+
if (!(pi->conn_state & L2CAP_CONN_WAIT_F))
break;
@@ -3387,8 +3431,8 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
pi->expected_ack_seq = tx_seq;
l2cap_drop_acked_frames(sk);
- if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY)
- && (pi->unacked_frames > 0))
+ if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
+ (pi->unacked_frames > 0))
__mod_retrans_timer();
l2cap_ertm_send(sk);
@@ -3402,10 +3446,24 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
pi->expected_ack_seq = __get_reqseq(rx_control);
l2cap_drop_acked_frames(sk);
- sk->sk_send_head = TX_QUEUE(sk)->next;
- pi->next_tx_seq = pi->expected_ack_seq;
+ if (rx_control & L2CAP_CTRL_FINAL) {
+ if (pi->conn_state & L2CAP_CONN_REJ_ACT)
+ pi->conn_state &= ~L2CAP_CONN_REJ_ACT;
+ else {
+ sk->sk_send_head = TX_QUEUE(sk)->next;
+ pi->next_tx_seq = pi->expected_ack_seq;
+ l2cap_ertm_send(sk);
+ }
+ } else {
+ sk->sk_send_head = TX_QUEUE(sk)->next;
+ pi->next_tx_seq = pi->expected_ack_seq;
+ l2cap_ertm_send(sk);
- l2cap_ertm_send(sk);
+ if (pi->conn_state & L2CAP_CONN_WAIT_F) {
+ pi->srej_save_reqseq = tx_seq;
+ pi->conn_state |= L2CAP_CONN_REJ_ACT;
+ }
+ }
break;
@@ -3424,7 +3482,7 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str
} else if (rx_control & L2CAP_CTRL_FINAL) {
if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) &&
pi->srej_save_reqseq == tx_seq)
- pi->srej_save_reqseq &= ~L2CAP_CONN_SREJ_ACT;
+ pi->conn_state &= ~L2CAP_CONN_SREJ_ACT;
else
l2cap_retransmit_frame(sk, tx_seq);
}
@@ -3924,7 +3982,7 @@ static const struct proto_ops l2cap_sock_ops = {
.getsockopt = l2cap_sock_getsockopt
};
-static struct net_proto_family l2cap_sock_family_ops = {
+static const struct net_proto_family l2cap_sock_family_ops = {
.family = PF_BLUETOOTH,
.owner = THIS_MODULE,
.create = l2cap_sock_create,
@@ -4003,6 +4061,9 @@ module_exit(l2cap_exit);
module_param(enable_ertm, bool, 0644);
MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode");
+module_param(max_transmit, uint, 0644);
+MODULE_PARM_DESC(max_transmit, "Max transmit value (default = 3)");
+
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION);
MODULE_VERSION(VERSION);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 14:00:57 +0000