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[Bluetooth] Add automatic sniff mode support

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This patch introduces the automatic sniff mode feature. This allows
the host to switch idle connections into sniff mode to safe power.

Signed-off-by: Ulisses Furquim <ulissesf@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Marcel Holtmann
2006-07-03 10:02:33 +02:00
committed by David S. Miller
parent da1f519851
commit 04837f6447
7 changed files with 460 additions and 92 deletions
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204
net/bluetooth/hci_event.c
View File

@@ -83,6 +83,8 @@ static void hci_cc_link_policy(struct hci_dev *hdev, __u16 ocf, struct sk_buff *
{
struct hci_conn *conn;
struct hci_rp_role_discovery *rd;
struct hci_rp_write_link_policy *lp;
void *sent;
BT_DBG("%s ocf 0x%x", hdev->name, ocf);
@@ -106,6 +108,27 @@ static void hci_cc_link_policy(struct hci_dev *hdev, __u16 ocf, struct sk_buff *
hci_dev_unlock(hdev);
break;
case OCF_WRITE_LINK_POLICY:
sent = hci_sent_cmd_data(hdev, OGF_LINK_POLICY, OCF_WRITE_LINK_POLICY);
if (!sent)
break;
lp = (struct hci_rp_write_link_policy *) skb->data;
if (lp->status)
break;
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(lp->handle));
if (conn) {
__le16 policy = get_unaligned((__le16 *) (sent + 2));
conn->link_policy = __le16_to_cpu(policy);
}
hci_dev_unlock(hdev);
break;
default:
BT_DBG("%s: Command complete: ogf LINK_POLICY ocf %x",
hdev->name, ocf);
@@ -274,7 +297,7 @@ static void hci_cc_host_ctl(struct hci_dev *hdev, __u16 ocf, struct sk_buff *skb
/* Command Complete OGF INFO_PARAM */
static void hci_cc_info_param(struct hci_dev *hdev, __u16 ocf, struct sk_buff *skb)
{
struct hci_rp_read_loc_features *lf;
struct hci_rp_read_local_features *lf;
struct hci_rp_read_buffer_size *bs;
struct hci_rp_read_bd_addr *ba;
@@ -282,7 +305,7 @@ static void hci_cc_info_param(struct hci_dev *hdev, __u16 ocf, struct sk_buff *s
switch (ocf) {
case OCF_READ_LOCAL_FEATURES:
lf = (struct hci_rp_read_loc_features *) skb->data;
lf = (struct hci_rp_read_local_features *) skb->data;
if (lf->status) {
BT_DBG("%s READ_LOCAL_FEATURES failed %d", hdev->name, lf->status);
@@ -447,8 +470,46 @@ static void hci_cs_link_policy(struct hci_dev *hdev, __u16 ocf, __u8 status)
BT_DBG("%s ocf 0x%x", hdev->name, ocf);
switch (ocf) {
case OCF_SNIFF_MODE:
if (status) {
struct hci_conn *conn;
struct hci_cp_sniff_mode *cp = hci_sent_cmd_data(hdev, OGF_LINK_POLICY, OCF_SNIFF_MODE);
if (!cp)
break;
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
if (conn) {
clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend);
}
hci_dev_unlock(hdev);
}
break;
case OCF_EXIT_SNIFF_MODE:
if (status) {
struct hci_conn *conn;
struct hci_cp_exit_sniff_mode *cp = hci_sent_cmd_data(hdev, OGF_LINK_POLICY, OCF_EXIT_SNIFF_MODE);
if (!cp)
break;
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
if (conn) {
clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend);
}
hci_dev_unlock(hdev);
}
break;
default:
BT_DBG("%s Command status: ogf HOST_POLICY ocf %x", hdev->name, ocf);
BT_DBG("%s Command status: ogf LINK_POLICY ocf %x", hdev->name, ocf);
break;
}
}
@@ -630,14 +691,16 @@ static inline void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *sk
else
cp.role = 0x01; /* Remain slave */
hci_send_cmd(hdev, OGF_LINK_CTL, OCF_ACCEPT_CONN_REQ, sizeof(cp), &cp);
hci_send_cmd(hdev, OGF_LINK_CTL,
OCF_ACCEPT_CONN_REQ, sizeof(cp), &cp);
} else {
/* Connection rejected */
struct hci_cp_reject_conn_req cp;
bacpy(&cp.bdaddr, &ev->bdaddr);
cp.reason = 0x0f;
hci_send_cmd(hdev, OGF_LINK_CTL, OCF_REJECT_CONN_REQ, sizeof(cp), &cp);
hci_send_cmd(hdev, OGF_LINK_CTL,
OCF_REJECT_CONN_REQ, sizeof(cp), &cp);
}
}
@@ -645,7 +708,7 @@ static inline void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *sk
static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_conn_complete *ev = (struct hci_ev_conn_complete *) skb->data;
struct hci_conn *conn = NULL;
struct hci_conn *conn;
BT_DBG("%s", hdev->name);
@@ -667,12 +730,21 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
if (test_bit(HCI_ENCRYPT, &hdev->flags))
conn->link_mode |= HCI_LM_ENCRYPT;
/* Get remote features */
if (conn->type == ACL_LINK) {
struct hci_cp_read_remote_features cp;
cp.handle = ev->handle;
hci_send_cmd(hdev, OGF_LINK_CTL,
OCF_READ_REMOTE_FEATURES, sizeof(cp), &cp);
}
/* Set link policy */
if (conn->type == ACL_LINK && hdev->link_policy) {
struct hci_cp_write_link_policy cp;
cp.handle = ev->handle;
cp.policy = __cpu_to_le16(hdev->link_policy);
hci_send_cmd(hdev, OGF_LINK_POLICY, OCF_WRITE_LINK_POLICY, sizeof(cp), &cp);
hci_send_cmd(hdev, OGF_LINK_POLICY,
OCF_WRITE_LINK_POLICY, sizeof(cp), &cp);
}
/* Set packet type for incoming connection */
@@ -683,7 +755,8 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
__cpu_to_le16(hdev->pkt_type & ACL_PTYPE_MASK):
__cpu_to_le16(hdev->pkt_type & SCO_PTYPE_MASK);
hci_send_cmd(hdev, OGF_LINK_CTL, OCF_CHANGE_CONN_PTYPE, sizeof(cp), &cp);
hci_send_cmd(hdev, OGF_LINK_CTL,
OCF_CHANGE_CONN_PTYPE, sizeof(cp), &cp);
}
} else
conn->state = BT_CLOSED;
@@ -711,8 +784,7 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
static inline void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_disconn_complete *ev = (struct hci_ev_disconn_complete *) skb->data;
struct hci_conn *conn = NULL;
__u16 handle = __le16_to_cpu(ev->handle);
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
@@ -721,7 +793,7 @@ static inline void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn) {
conn->state = BT_CLOSED;
hci_proto_disconn_ind(conn, ev->reason);
@@ -778,7 +850,7 @@ static inline void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *s
static inline void hci_role_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_role_change *ev = (struct hci_ev_role_change *) skb->data;
struct hci_conn *conn = NULL;
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
@@ -801,18 +873,43 @@ static inline void hci_role_change_evt(struct hci_dev *hdev, struct sk_buff *skb
hci_dev_unlock(hdev);
}
/* Authentication Complete */
static inline void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
/* Mode Change */
static inline void hci_mode_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_auth_complete *ev = (struct hci_ev_auth_complete *) skb->data;
struct hci_conn *conn = NULL;
__u16 handle = __le16_to_cpu(ev->handle);
struct hci_ev_mode_change *ev = (struct hci_ev_mode_change *) skb->data;
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn) {
conn->mode = ev->mode;
conn->interval = __le16_to_cpu(ev->interval);
if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) {
if (conn->mode == HCI_CM_ACTIVE)
conn->power_save = 1;
else
conn->power_save = 0;
}
}
hci_dev_unlock(hdev);
}
/* Authentication Complete */
static inline void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_auth_complete *ev = (struct hci_ev_auth_complete *) skb->data;
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn) {
if (!ev->status)
conn->link_mode |= HCI_LM_AUTH;
@@ -827,8 +924,7 @@ static inline void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *s
cp.handle = __cpu_to_le16(conn->handle);
cp.encrypt = 1;
hci_send_cmd(conn->hdev, OGF_LINK_CTL,
OCF_SET_CONN_ENCRYPT,
sizeof(cp), &cp);
OCF_SET_CONN_ENCRYPT, sizeof(cp), &cp);
} else {
clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend);
hci_encrypt_cfm(conn, ev->status, 0x00);
@@ -843,14 +939,13 @@ static inline void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *s
static inline void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_encrypt_change *ev = (struct hci_ev_encrypt_change *) skb->data;
struct hci_conn *conn = NULL;
__u16 handle = __le16_to_cpu(ev->handle);
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn) {
if (!ev->status) {
if (ev->encrypt)
@@ -871,14 +966,13 @@ static inline void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *
static inline void hci_change_conn_link_key_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_change_conn_link_key_complete *ev = (struct hci_ev_change_conn_link_key_complete *) skb->data;
struct hci_conn *conn = NULL;
__u16 handle = __le16_to_cpu(ev->handle);
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn) {
if (!ev->status)
conn->link_mode |= HCI_LM_SECURE;
@@ -906,18 +1000,35 @@ static inline void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff
{
}
/* Clock Offset */
static inline void hci_clock_offset_evt(struct hci_dev *hdev, struct sk_buff *skb)
/* Remote Features */
static inline void hci_remote_features_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_clock_offset *ev = (struct hci_ev_clock_offset *) skb->data;
struct hci_conn *conn = NULL;
__u16 handle = __le16_to_cpu(ev->handle);
struct hci_ev_remote_features *ev = (struct hci_ev_remote_features *) skb->data;
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn && !ev->status) {
memcpy(conn->features, ev->features, sizeof(conn->features));
}
hci_dev_unlock(hdev);
}
/* Clock Offset */
static inline void hci_clock_offset_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_clock_offset *ev = (struct hci_ev_clock_offset *) skb->data;
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn && !ev->status) {
struct inquiry_entry *ie;
@@ -948,6 +1059,23 @@ static inline void hci_pscan_rep_mode_evt(struct hci_dev *hdev, struct sk_buff *
hci_dev_unlock(hdev);
}
/* Sniff Subrate */
static inline void hci_sniff_subrate_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_sniff_subrate *ev = (struct hci_ev_sniff_subrate *) skb->data;
struct hci_conn *conn;
BT_DBG("%s status %d", hdev->name, ev->status);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (conn) {
}
hci_dev_unlock(hdev);
}
void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_event_hdr *hdr = (struct hci_event_hdr *) skb->data;
@@ -996,6 +1124,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
hci_role_change_evt(hdev, skb);
break;
case HCI_EV_MODE_CHANGE:
hci_mode_change_evt(hdev, skb);
break;
case HCI_EV_AUTH_COMPLETE:
hci_auth_complete_evt(hdev, skb);
break;
@@ -1020,6 +1152,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
hci_link_key_notify_evt(hdev, skb);
break;
case HCI_EV_REMOTE_FEATURES:
hci_remote_features_evt(hdev, skb);
break;
case HCI_EV_CLOCK_OFFSET:
hci_clock_offset_evt(hdev, skb);
break;
@@ -1028,6 +1164,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
hci_pscan_rep_mode_evt(hdev, skb);
break;
case HCI_EV_SNIFF_SUBRATE:
hci_sniff_subrate_evt(hdev, skb);
break;
case HCI_EV_CMD_STATUS:
cs = (struct hci_ev_cmd_status *) skb->data;
skb_pull(skb, sizeof(cs));