zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/bluetooth/hci_conn.c b/ap/os/linux/linux-3.4.x/net/bluetooth/hci_conn.c
new file mode 100644
index 0000000..f767b87
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/bluetooth/hci_conn.c
@@ -0,0 +1,999 @@
+/*
+ BlueZ - Bluetooth protocol stack for Linux
+ Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
+
+ Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation;
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+ ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI connection handling. */
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <net/sock.h>
+
+#include <linux/uaccess.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/smp.h>
+
+static void hci_le_connect(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_cp_le_create_conn cp;
+
+ conn->state = BT_CONNECT;
+ conn->out = true;
+ conn->link_mode |= HCI_LM_MASTER;
+ conn->sec_level = BT_SECURITY_LOW;
+
+ memset(&cp, 0, sizeof(cp));
+ cp.scan_interval = cpu_to_le16(0x0060);
+ cp.scan_window = cpu_to_le16(0x0030);
+ bacpy(&cp.peer_addr, &conn->dst);
+ cp.peer_addr_type = conn->dst_type;
+ cp.conn_interval_min = cpu_to_le16(0x0028);
+ cp.conn_interval_max = cpu_to_le16(0x0038);
+ cp.supervision_timeout = cpu_to_le16(0x002a);
+ cp.min_ce_len = cpu_to_le16(0x0000);
+ cp.max_ce_len = cpu_to_le16(0x0000);
+
+ hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
+}
+
+static void hci_le_connect_cancel(struct hci_conn *conn)
+{
+ hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
+}
+
+void hci_acl_connect(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct inquiry_entry *ie;
+ struct hci_cp_create_conn cp;
+
+ BT_DBG("hcon %p", conn);
+
+ conn->state = BT_CONNECT;
+ conn->out = true;
+
+ conn->link_mode = HCI_LM_MASTER;
+
+ conn->attempt++;
+
+ conn->link_policy = hdev->link_policy;
+
+ memset(&cp, 0, sizeof(cp));
+ bacpy(&cp.bdaddr, &conn->dst);
+ cp.pscan_rep_mode = 0x02;
+
+ ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+ if (ie) {
+ if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
+ cp.pscan_rep_mode = ie->data.pscan_rep_mode;
+ cp.pscan_mode = ie->data.pscan_mode;
+ cp.clock_offset = ie->data.clock_offset |
+ cpu_to_le16(0x8000);
+ }
+
+ memcpy(conn->dev_class, ie->data.dev_class, 3);
+ if (ie->data.ssp_mode > 0)
+ set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
+ }
+
+ cp.pkt_type = cpu_to_le16(conn->pkt_type);
+ if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
+ cp.role_switch = 0x01;
+ else
+ cp.role_switch = 0x00;
+
+ hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
+}
+
+static void hci_acl_connect_cancel(struct hci_conn *conn)
+{
+ struct hci_cp_create_conn_cancel cp;
+
+ BT_DBG("%p", conn);
+
+ if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
+ return;
+
+ bacpy(&cp.bdaddr, &conn->dst);
+ hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
+}
+
+void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
+{
+ struct hci_cp_disconnect cp;
+
+ BT_DBG("%p", conn);
+
+ conn->state = BT_DISCONN;
+
+ cp.handle = cpu_to_le16(conn->handle);
+ cp.reason = reason;
+ hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
+}
+
+void hci_add_sco(struct hci_conn *conn, __u16 handle)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_cp_add_sco cp;
+
+ BT_DBG("%p", conn);
+
+ conn->state = BT_CONNECT;
+ conn->out = true;
+
+ conn->attempt++;
+
+ cp.handle = cpu_to_le16(handle);
+ cp.pkt_type = cpu_to_le16(conn->pkt_type);
+
+ hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
+}
+
+void hci_setup_sync(struct hci_conn *conn, __u16 handle)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_cp_setup_sync_conn cp;
+
+ BT_DBG("%p", conn);
+
+ conn->state = BT_CONNECT;
+ conn->out = true;
+
+ conn->attempt++;
+
+ cp.handle = cpu_to_le16(handle);
+ cp.pkt_type = cpu_to_le16(conn->pkt_type);
+
+ cp.tx_bandwidth = cpu_to_le32(0x00001f40);
+ cp.rx_bandwidth = cpu_to_le32(0x00001f40);
+ cp.max_latency = cpu_to_le16(0xffff);
+ cp.voice_setting = cpu_to_le16(hdev->voice_setting);
+ cp.retrans_effort = 0xff;
+
+ hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
+}
+
+void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
+ u16 latency, u16 to_multiplier)
+{
+ struct hci_cp_le_conn_update cp;
+ struct hci_dev *hdev = conn->hdev;
+
+ memset(&cp, 0, sizeof(cp));
+
+ cp.handle = cpu_to_le16(conn->handle);
+ cp.conn_interval_min = cpu_to_le16(min);
+ cp.conn_interval_max = cpu_to_le16(max);
+ cp.conn_latency = cpu_to_le16(latency);
+ cp.supervision_timeout = cpu_to_le16(to_multiplier);
+ cp.min_ce_len = cpu_to_le16(0x0001);
+ cp.max_ce_len = cpu_to_le16(0x0001);
+
+ hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
+}
+EXPORT_SYMBOL(hci_le_conn_update);
+
+void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
+ __u8 ltk[16])
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_cp_le_start_enc cp;
+
+ BT_DBG("%p", conn);
+
+ memset(&cp, 0, sizeof(cp));
+
+ cp.handle = cpu_to_le16(conn->handle);
+ memcpy(cp.ltk, ltk, sizeof(cp.ltk));
+ cp.ediv = ediv;
+ memcpy(cp.rand, rand, sizeof(cp.rand));
+
+ hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
+}
+EXPORT_SYMBOL(hci_le_start_enc);
+
+void hci_le_ltk_neg_reply(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_cp_le_ltk_neg_reply cp;
+
+ BT_DBG("%p", conn);
+
+ memset(&cp, 0, sizeof(cp));
+
+ cp.handle = cpu_to_le16(conn->handle);
+
+ hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(cp), &cp);
+}
+
+/* Device _must_ be locked */
+void hci_sco_setup(struct hci_conn *conn, __u8 status)
+{
+ struct hci_conn *sco = conn->link;
+
+ BT_DBG("%p", conn);
+
+ if (!sco)
+ return;
+
+ if (!status) {
+ if (lmp_esco_capable(conn->hdev))
+ hci_setup_sync(sco, conn->handle);
+ else
+ hci_add_sco(sco, conn->handle);
+ } else {
+ hci_proto_connect_cfm(sco, status);
+ hci_conn_del(sco);
+ }
+}
+
+static void hci_conn_timeout(struct work_struct *work)
+{
+ struct hci_conn *conn = container_of(work, struct hci_conn,
+ disc_work.work);
+ __u8 reason;
+
+ BT_DBG("conn %p state %s", conn, state_to_string(conn->state));
+
+ if (atomic_read(&conn->refcnt))
+ return;
+
+ switch (conn->state) {
+ case BT_CONNECT:
+ case BT_CONNECT2:
+ if (conn->out) {
+ if (conn->type == ACL_LINK)
+ hci_acl_connect_cancel(conn);
+ else if (conn->type == LE_LINK)
+ hci_le_connect_cancel(conn);
+ }
+ break;
+ case BT_CONFIG:
+ case BT_CONNECTED:
+ reason = hci_proto_disconn_ind(conn);
+ hci_acl_disconn(conn, reason);
+ break;
+ default:
+ conn->state = BT_CLOSED;
+ break;
+ }
+}
+
+/* Enter sniff mode */
+static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("conn %p mode %d", conn, conn->mode);
+
+ if (test_bit(HCI_RAW, &hdev->flags))
+ return;
+
+ if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
+ return;
+
+ if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
+ return;
+
+ if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
+ struct hci_cp_sniff_subrate cp;
+ cp.handle = cpu_to_le16(conn->handle);
+ cp.max_latency = cpu_to_le16(0);
+ cp.min_remote_timeout = cpu_to_le16(0);
+ cp.min_local_timeout = cpu_to_le16(0);
+ hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
+ }
+
+ if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
+ struct hci_cp_sniff_mode cp;
+ cp.handle = cpu_to_le16(conn->handle);
+ cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
+ cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
+ cp.attempt = cpu_to_le16(4);
+ cp.timeout = cpu_to_le16(1);
+ hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
+ }
+}
+
+static void hci_conn_idle(unsigned long arg)
+{
+ struct hci_conn *conn = (void *) arg;
+
+ BT_DBG("conn %p mode %d", conn, conn->mode);
+
+ hci_conn_enter_sniff_mode(conn);
+}
+
+static void hci_conn_auto_accept(unsigned long arg)
+{
+ struct hci_conn *conn = (void *) arg;
+ struct hci_dev *hdev = conn->hdev;
+
+ hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
+ &conn->dst);
+}
+
+struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type,
+ __u16 pkt_type, bdaddr_t *dst)
+{
+ struct hci_conn *conn;
+
+ BT_DBG("%s dst %s", hdev->name, batostr(dst));
+
+ conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
+ if (!conn)
+ return NULL;
+
+ bacpy(&conn->dst, dst);
+ conn->hdev = hdev;
+ conn->type = type;
+ conn->mode = HCI_CM_ACTIVE;
+ conn->state = BT_OPEN;
+ conn->auth_type = HCI_AT_GENERAL_BONDING;
+ conn->io_capability = hdev->io_capability;
+ conn->remote_auth = 0xff;
+ conn->key_type = 0xff;
+
+ set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
+ conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+
+ switch (type) {
+ case ACL_LINK:
+ conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
+ break;
+ case SCO_LINK:
+ if (!pkt_type)
+ pkt_type = SCO_ESCO_MASK;
+ case ESCO_LINK:
+ if (!pkt_type)
+ pkt_type = ALL_ESCO_MASK;
+ if (lmp_esco_capable(hdev)) {
+ /* HCI Setup Synchronous Connection Command uses
+ reverse logic on the EDR_ESCO_MASK bits */
+ conn->pkt_type = (pkt_type ^ EDR_ESCO_MASK) &
+ hdev->esco_type;
+ } else {
+ /* Legacy HCI Add Sco Connection Command uses a
+ shifted bitmask */
+ conn->pkt_type = (pkt_type << 5) & hdev->pkt_type &
+ SCO_PTYPE_MASK;
+ }
+ break;
+ }
+
+ skb_queue_head_init(&conn->data_q);
+
+ INIT_LIST_HEAD(&conn->chan_list);
+
+ INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
+ setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
+ setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
+ (unsigned long) conn);
+
+ atomic_set(&conn->refcnt, 0);
+
+ hci_dev_hold(hdev);
+
+ hci_conn_hash_add(hdev, conn);
+ if (hdev->notify)
+ hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
+
+ atomic_set(&conn->devref, 0);
+
+ hci_conn_init_sysfs(conn);
+
+ return conn;
+}
+
+int hci_conn_del(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle);
+
+ del_timer(&conn->idle_timer);
+
+ cancel_delayed_work_sync(&conn->disc_work);
+
+ del_timer(&conn->auto_accept_timer);
+
+ if (conn->type == ACL_LINK) {
+ struct hci_conn *sco = conn->link;
+ if (sco)
+ sco->link = NULL;
+
+ /* Unacked frames */
+ hdev->acl_cnt += conn->sent;
+ } else if (conn->type == LE_LINK) {
+ if (hdev->le_pkts)
+ hdev->le_cnt += conn->sent;
+ else
+ hdev->acl_cnt += conn->sent;
+ } else {
+ struct hci_conn *acl = conn->link;
+ if (acl) {
+ acl->link = NULL;
+ hci_conn_put(acl);
+ }
+ }
+
+
+ hci_chan_list_flush(conn);
+
+ hci_conn_hash_del(hdev, conn);
+ if (hdev->notify)
+ hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
+
+ skb_queue_purge(&conn->data_q);
+
+ hci_conn_put_device(conn);
+
+ hci_dev_put(hdev);
+
+ if (conn->handle == 0)
+ kfree(conn);
+
+ return 0;
+}
+
+struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
+{
+ int use_src = bacmp(src, BDADDR_ANY);
+ struct hci_dev *hdev = NULL, *d;
+
+ BT_DBG("%s -> %s", batostr(src), batostr(dst));
+
+ read_lock(&hci_dev_list_lock);
+
+ list_for_each_entry(d, &hci_dev_list, list) {
+ if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags))
+ continue;
+
+ /* Simple routing:
+ * No source address - find interface with bdaddr != dst
+ * Source address - find interface with bdaddr == src
+ */
+
+ if (use_src) {
+ if (!bacmp(&d->bdaddr, src)) {
+ hdev = d; break;
+ }
+ } else {
+ if (bacmp(&d->bdaddr, dst)) {
+ hdev = d; break;
+ }
+ }
+ }
+
+ if (hdev)
+ hdev = hci_dev_hold(hdev);
+
+ read_unlock(&hci_dev_list_lock);
+ return hdev;
+}
+EXPORT_SYMBOL(hci_get_route);
+
+/* Create SCO, ACL or LE connection.
+ * Device _must_ be locked */
+struct hci_conn *hci_connect(struct hci_dev *hdev, int type,
+ __u16 pkt_type, bdaddr_t *dst,
+ __u8 sec_level, __u8 auth_type)
+{
+ struct hci_conn *acl;
+ struct hci_conn *sco;
+ struct hci_conn *le;
+
+ BT_DBG("%s dst %s", hdev->name, batostr(dst));
+
+ if (type == LE_LINK) {
+ struct adv_entry *entry;
+
+ le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
+ if (le)
+ return ERR_PTR(-EBUSY);
+
+ entry = hci_find_adv_entry(hdev, dst);
+ if (!entry)
+ return ERR_PTR(-EHOSTUNREACH);
+
+ le = hci_conn_add(hdev, LE_LINK, 0, dst);
+ if (!le)
+ return ERR_PTR(-ENOMEM);
+
+ le->dst_type = entry->bdaddr_type;
+
+ hci_le_connect(le);
+
+ hci_conn_hold(le);
+
+ return le;
+ }
+
+ acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+ if (!acl) {
+ acl = hci_conn_add(hdev, ACL_LINK, 0, dst);
+ if (!acl)
+ return ERR_PTR(-ENOMEM);
+ }
+
+ hci_conn_hold(acl);
+
+ if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
+ acl->sec_level = BT_SECURITY_LOW;
+ acl->pending_sec_level = sec_level;
+ acl->auth_type = auth_type;
+ hci_acl_connect(acl);
+ }
+
+ if (type == ACL_LINK)
+ return acl;
+
+ sco = hci_conn_hash_lookup_ba(hdev, type, dst);
+ if (!sco) {
+ sco = hci_conn_add(hdev, type, pkt_type, dst);
+ if (!sco) {
+ hci_conn_put(acl);
+ return ERR_PTR(-ENOMEM);
+ }
+ }
+
+ acl->link = sco;
+ sco->link = acl;
+
+ hci_conn_hold(sco);
+
+ if (acl->state == BT_CONNECTED &&
+ (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
+ set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
+ hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
+
+ if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
+ /* defer SCO setup until mode change completed */
+ set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
+ return sco;
+ }
+
+ hci_sco_setup(acl, 0x00);
+ }
+
+ return sco;
+}
+EXPORT_SYMBOL(hci_connect);
+
+/* Check link security requirement */
+int hci_conn_check_link_mode(struct hci_conn *conn)
+{
+ BT_DBG("conn %p", conn);
+
+ if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
+ return 0;
+
+ return 1;
+}
+EXPORT_SYMBOL(hci_conn_check_link_mode);
+
+/* Authenticate remote device */
+static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
+{
+ BT_DBG("conn %p", conn);
+
+ if (conn->pending_sec_level > sec_level)
+ sec_level = conn->pending_sec_level;
+
+ if (sec_level > conn->sec_level)
+ conn->pending_sec_level = sec_level;
+ else if (conn->link_mode & HCI_LM_AUTH)
+ return 1;
+
+ /* Make sure we preserve an existing MITM requirement*/
+ auth_type |= (conn->auth_type & 0x01);
+
+ conn->auth_type = auth_type;
+
+ if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+ struct hci_cp_auth_requested cp;
+
+ /* encrypt must be pending if auth is also pending */
+ set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
+
+ cp.handle = cpu_to_le16(conn->handle);
+ hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
+ sizeof(cp), &cp);
+ if (conn->key_type != 0xff)
+ set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
+ }
+
+ return 0;
+}
+
+/* Encrypt the the link */
+static void hci_conn_encrypt(struct hci_conn *conn)
+{
+ BT_DBG("conn %p", conn);
+
+ if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
+ struct hci_cp_set_conn_encrypt cp;
+ cp.handle = cpu_to_le16(conn->handle);
+ cp.encrypt = 0x01;
+ hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
+ &cp);
+ }
+}
+
+/* Enable security */
+int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
+{
+ BT_DBG("conn %p", conn);
+
+ if (conn->type == LE_LINK)
+ return smp_conn_security(conn, sec_level);
+
+ /* For sdp we don't need the link key. */
+ if (sec_level == BT_SECURITY_SDP)
+ return 1;
+
+ /* For non 2.1 devices and low security level we don't need the link
+ key. */
+ if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
+ return 1;
+
+ /* For other security levels we need the link key. */
+ if (!(conn->link_mode & HCI_LM_AUTH))
+ goto auth;
+
+ /* An authenticated combination key has sufficient security for any
+ security level. */
+ if (conn->key_type == HCI_LK_AUTH_COMBINATION)
+ goto encrypt;
+
+ /* An unauthenticated combination key has sufficient security for
+ security level 1 and 2. */
+ if (conn->key_type == HCI_LK_UNAUTH_COMBINATION &&
+ (sec_level == BT_SECURITY_MEDIUM ||
+ sec_level == BT_SECURITY_LOW))
+ goto encrypt;
+
+ /* A combination key has always sufficient security for the security
+ levels 1 or 2. High security level requires the combination key
+ is generated using maximum PIN code length (16).
+ For pre 2.1 units. */
+ if (conn->key_type == HCI_LK_COMBINATION &&
+ (sec_level != BT_SECURITY_HIGH ||
+ conn->pin_length == 16))
+ goto encrypt;
+
+auth:
+ if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
+ return 0;
+
+ if (!hci_conn_auth(conn, sec_level, auth_type))
+ return 0;
+
+encrypt:
+ if (conn->link_mode & HCI_LM_ENCRYPT)
+ return 1;
+
+ hci_conn_encrypt(conn);
+ return 0;
+}
+EXPORT_SYMBOL(hci_conn_security);
+
+/* Check secure link requirement */
+int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
+{
+ BT_DBG("conn %p", conn);
+
+ if (sec_level != BT_SECURITY_HIGH)
+ return 1; /* Accept if non-secure is required */
+
+ if (conn->sec_level == BT_SECURITY_HIGH)
+ return 1;
+
+ return 0; /* Reject not secure link */
+}
+EXPORT_SYMBOL(hci_conn_check_secure);
+
+/* Change link key */
+int hci_conn_change_link_key(struct hci_conn *conn)
+{
+ BT_DBG("conn %p", conn);
+
+ if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+ struct hci_cp_change_conn_link_key cp;
+ cp.handle = cpu_to_le16(conn->handle);
+ hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
+ sizeof(cp), &cp);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(hci_conn_change_link_key);
+
+/* Switch role */
+int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
+{
+ BT_DBG("conn %p", conn);
+
+ if (!role && conn->link_mode & HCI_LM_MASTER)
+ return 1;
+
+ if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
+ struct hci_cp_switch_role cp;
+ bacpy(&cp.bdaddr, &conn->dst);
+ cp.role = role;
+ hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(hci_conn_switch_role);
+
+/* Enter active mode */
+void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
+{
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("conn %p mode %d", conn, conn->mode);
+
+ if (test_bit(HCI_RAW, &hdev->flags))
+ return;
+
+ if (conn->mode != HCI_CM_SNIFF)
+ goto timer;
+
+ if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
+ goto timer;
+
+ if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
+ struct hci_cp_exit_sniff_mode cp;
+ cp.handle = cpu_to_le16(conn->handle);
+ hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
+ }
+
+timer:
+ if (hdev->idle_timeout > 0)
+ mod_timer(&conn->idle_timer,
+ jiffies + msecs_to_jiffies(hdev->idle_timeout));
+}
+
+/* Drop all connection on the device */
+void hci_conn_hash_flush(struct hci_dev *hdev)
+{
+ struct hci_conn_hash *h = &hdev->conn_hash;
+ struct hci_conn *c, *n;
+
+ BT_DBG("hdev %s", hdev->name);
+
+ list_for_each_entry_safe(c, n, &h->list, list) {
+ c->state = BT_CLOSED;
+
+ hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
+ hci_conn_del(c);
+ }
+}
+
+/* Check pending connect attempts */
+void hci_conn_check_pending(struct hci_dev *hdev)
+{
+ struct hci_conn *conn;
+
+ BT_DBG("hdev %s", hdev->name);
+
+ hci_dev_lock(hdev);
+
+ conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
+ if (conn)
+ hci_acl_connect(conn);
+
+ hci_dev_unlock(hdev);
+}
+
+void hci_conn_hold_device(struct hci_conn *conn)
+{
+ atomic_inc(&conn->devref);
+}
+EXPORT_SYMBOL(hci_conn_hold_device);
+
+void hci_conn_put_device(struct hci_conn *conn)
+{
+ if (atomic_dec_and_test(&conn->devref))
+ hci_conn_del_sysfs(conn);
+}
+EXPORT_SYMBOL(hci_conn_put_device);
+
+int hci_get_conn_list(void __user *arg)
+{
+ register struct hci_conn *c;
+ struct hci_conn_list_req req, *cl;
+ struct hci_conn_info *ci;
+ struct hci_dev *hdev;
+ int n = 0, size, err;
+
+ if (copy_from_user(&req, arg, sizeof(req)))
+ return -EFAULT;
+
+ if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
+ return -EINVAL;
+
+ size = sizeof(req) + req.conn_num * sizeof(*ci);
+
+ cl = kmalloc(size, GFP_KERNEL);
+ if (!cl)
+ return -ENOMEM;
+
+ hdev = hci_dev_get(req.dev_id);
+ if (!hdev) {
+ kfree(cl);
+ return -ENODEV;
+ }
+
+ ci = cl->conn_info;
+
+ hci_dev_lock(hdev);
+ list_for_each_entry(c, &hdev->conn_hash.list, list) {
+ bacpy(&(ci + n)->bdaddr, &c->dst);
+ (ci + n)->handle = c->handle;
+ (ci + n)->type = c->type;
+ (ci + n)->out = c->out;
+ (ci + n)->state = c->state;
+ (ci + n)->link_mode = c->link_mode;
+ if (c->type == SCO_LINK) {
+ (ci + n)->mtu = hdev->sco_mtu;
+ (ci + n)->cnt = hdev->sco_cnt;
+ (ci + n)->pkts = hdev->sco_pkts;
+ } else {
+ (ci + n)->mtu = hdev->acl_mtu;
+ (ci + n)->cnt = hdev->acl_cnt;
+ (ci + n)->pkts = hdev->acl_pkts;
+ }
+ if (++n >= req.conn_num)
+ break;
+ }
+ hci_dev_unlock(hdev);
+
+ cl->dev_id = hdev->id;
+ cl->conn_num = n;
+ size = sizeof(req) + n * sizeof(*ci);
+
+ hci_dev_put(hdev);
+
+ err = copy_to_user(arg, cl, size);
+ kfree(cl);
+
+ return err ? -EFAULT : 0;
+}
+
+int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
+{
+ struct hci_conn_info_req req;
+ struct hci_conn_info ci;
+ struct hci_conn *conn;
+ char __user *ptr = arg + sizeof(req);
+
+ if (copy_from_user(&req, arg, sizeof(req)))
+ return -EFAULT;
+
+ hci_dev_lock(hdev);
+ conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
+ if (conn) {
+ bacpy(&ci.bdaddr, &conn->dst);
+ ci.handle = conn->handle;
+ ci.type = conn->type;
+ ci.out = conn->out;
+ ci.state = conn->state;
+ ci.link_mode = conn->link_mode;
+ if (req.type == SCO_LINK) {
+ ci.mtu = hdev->sco_mtu;
+ ci.cnt = hdev->sco_cnt;
+ ci.pkts = hdev->sco_pkts;
+ } else {
+ ci.mtu = hdev->acl_mtu;
+ ci.cnt = hdev->acl_cnt;
+ ci.pkts = hdev->acl_pkts;
+ }
+ }
+ hci_dev_unlock(hdev);
+
+ if (!conn)
+ return -ENOENT;
+
+ return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
+}
+
+int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
+{
+ struct hci_auth_info_req req;
+ struct hci_conn *conn;
+
+ if (copy_from_user(&req, arg, sizeof(req)))
+ return -EFAULT;
+
+ hci_dev_lock(hdev);
+ conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
+ if (conn)
+ req.type = conn->auth_type;
+ hci_dev_unlock(hdev);
+
+ if (!conn)
+ return -ENOENT;
+
+ return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
+}
+
+struct hci_chan *hci_chan_create(struct hci_conn *conn)
+{
+ struct hci_dev *hdev = conn->hdev;
+ struct hci_chan *chan;
+
+ BT_DBG("%s conn %p", hdev->name, conn);
+
+ chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
+ if (!chan)
+ return NULL;
+
+ chan->conn = conn;
+ skb_queue_head_init(&chan->data_q);
+
+ list_add_rcu(&chan->list, &conn->chan_list);
+
+ return chan;
+}
+
+int hci_chan_del(struct hci_chan *chan)
+{
+ struct hci_conn *conn = chan->conn;
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("%s conn %p chan %p", hdev->name, conn, chan);
+
+ list_del_rcu(&chan->list);
+
+ synchronize_rcu();
+
+ skb_queue_purge(&chan->data_q);
+ kfree(chan);
+
+ return 0;
+}
+
+void hci_chan_list_flush(struct hci_conn *conn)
+{
+ struct hci_chan *chan, *n;
+
+ BT_DBG("conn %p", conn);
+
+ list_for_each_entry_safe(chan, n, &conn->chan_list, list)
+ hci_chan_del(chan);
+}