diff options
Diffstat (limited to 'net/bluetooth/hci_event.c')
| -rw-r--r-- | net/bluetooth/hci_event.c | 7761 |
1 files changed, 7761 insertions, 0 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c new file mode 100644 index 0000000000..16e4427732 --- /dev/null +++ b/net/bluetooth/hci_event.c @@ -0,0 +1,7761 @@ +/* + BlueZ - Bluetooth protocol stack for Linux + Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. + Copyright 2023 NXP + + 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 event handling. */ + +#include <asm/unaligned.h> +#include <linux/crypto.h> +#include <crypto/algapi.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> +#include <net/bluetooth/mgmt.h> + +#include "hci_request.h" +#include "hci_debugfs.h" +#include "hci_codec.h" +#include "a2mp.h" +#include "amp.h" +#include "smp.h" +#include "msft.h" +#include "eir.h" + +#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \ + "\x00\x00\x00\x00\x00\x00\x00\x00" + +#define secs_to_jiffies(_secs) msecs_to_jiffies((_secs) * 1000) + +/* Handle HCI Event packets */ + +static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, + u8 ev, size_t len) +{ + void *data; + + data = skb_pull_data(skb, len); + if (!data) + bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev); + + return data; +} + +static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, + u16 op, size_t len) +{ + void *data; + + data = skb_pull_data(skb, len); + if (!data) + bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op); + + return data; +} + +static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, + u8 ev, size_t len) +{ + void *data; + + data = skb_pull_data(skb, len); + if (!data) + bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev); + + return data; +} + +static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + /* It is possible that we receive Inquiry Complete event right + * before we receive Inquiry Cancel Command Complete event, in + * which case the latter event should have status of Command + * Disallowed (0x0c). This should not be treated as error, since + * we actually achieve what Inquiry Cancel wants to achieve, + * which is to end the last Inquiry session. + */ + if (rp->status == 0x0c && !test_bit(HCI_INQUIRY, &hdev->flags)) { + bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command"); + rp->status = 0x00; + } + + if (rp->status) + return rp->status; + + clear_bit(HCI_INQUIRY, &hdev->flags); + smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */ + wake_up_bit(&hdev->flags, HCI_INQUIRY); + + hci_dev_lock(hdev); + /* Set discovery state to stopped if we're not doing LE active + * scanning. + */ + if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || + hdev->le_scan_type != LE_SCAN_ACTIVE) + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + hci_dev_unlock(hdev); + + hci_conn_check_pending(hdev); + + return rp->status; +} + +static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_set_flag(hdev, HCI_PERIODIC_INQ); + + return rp->status; +} + +static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); + + hci_conn_check_pending(hdev); + + return rp->status; +} + +static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + return rp->status; +} + +static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_role_discovery *rp = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (conn) + conn->role = rp->role; + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_link_policy *rp = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (conn) + conn->link_policy = __le16_to_cpu(rp->policy); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_write_link_policy *rp = data; + struct hci_conn *conn; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (conn) + conn->link_policy = get_unaligned_le16(sent + 2); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_def_link_policy *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->link_policy = __le16_to_cpu(rp->policy); + + return rp->status; +} + +static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY); + if (!sent) + return rp->status; + + hdev->link_policy = get_unaligned_le16(sent); + + return rp->status; +} + +static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + clear_bit(HCI_RESET, &hdev->flags); + + if (rp->status) + return rp->status; + + /* Reset all non-persistent flags */ + hci_dev_clear_volatile_flags(hdev); + + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + + hdev->inq_tx_power = HCI_TX_POWER_INVALID; + hdev->adv_tx_power = HCI_TX_POWER_INVALID; + + memset(hdev->adv_data, 0, sizeof(hdev->adv_data)); + hdev->adv_data_len = 0; + + memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data)); + hdev->scan_rsp_data_len = 0; + + hdev->le_scan_type = LE_SCAN_PASSIVE; + + hdev->ssp_debug_mode = 0; + + hci_bdaddr_list_clear(&hdev->le_accept_list); + hci_bdaddr_list_clear(&hdev->le_resolv_list); + + return rp->status; +} + +static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_stored_link_key *rp = data; + struct hci_cp_read_stored_link_key *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY); + if (!sent) + return rp->status; + + if (!rp->status && sent->read_all == 0x01) { + hdev->stored_max_keys = le16_to_cpu(rp->max_keys); + hdev->stored_num_keys = le16_to_cpu(rp->num_keys); + } + + return rp->status; +} + +static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_delete_stored_link_key *rp = data; + u16 num_keys; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + num_keys = le16_to_cpu(rp->num_keys); + + if (num_keys <= hdev->stored_num_keys) + hdev->stored_num_keys -= num_keys; + else + hdev->stored_num_keys = 0; + + return rp->status; +} + +static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_set_local_name_complete(hdev, sent, rp->status); + else if (!rp->status) + memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_name *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (hci_dev_test_flag(hdev, HCI_SETUP) || + hci_dev_test_flag(hdev, HCI_CONFIG)) + memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH); + + return rp->status; +} + +static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (!rp->status) { + __u8 param = *((__u8 *) sent); + + if (param == AUTH_ENABLED) + set_bit(HCI_AUTH, &hdev->flags); + else + clear_bit(HCI_AUTH, &hdev->flags); + } + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_auth_enable_complete(hdev, rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + __u8 param; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE); + if (!sent) + return rp->status; + + param = *((__u8 *) sent); + + if (param) + set_bit(HCI_ENCRYPT, &hdev->flags); + else + clear_bit(HCI_ENCRYPT, &hdev->flags); + + return rp->status; +} + +static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + __u8 param; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE); + if (!sent) + return rp->status; + + param = *((__u8 *) sent); + + hci_dev_lock(hdev); + + if (rp->status) { + hdev->discov_timeout = 0; + goto done; + } + + if (param & SCAN_INQUIRY) + set_bit(HCI_ISCAN, &hdev->flags); + else + clear_bit(HCI_ISCAN, &hdev->flags); + + if (param & SCAN_PAGE) + set_bit(HCI_PSCAN, &hdev->flags); + else + clear_bit(HCI_PSCAN, &hdev->flags); + +done: + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_set_event_filter *cp; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT); + if (!sent) + return rp->status; + + cp = (struct hci_cp_set_event_filter *)sent; + + if (cp->flt_type == HCI_FLT_CLEAR_ALL) + hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED); + else + hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED); + + return rp->status; +} + +static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_class_of_dev *rp = data; + + if (WARN_ON(!hdev)) + return HCI_ERROR_UNSPECIFIED; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + memcpy(hdev->dev_class, rp->dev_class, 3); + + bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2], + hdev->dev_class[1], hdev->dev_class[0]); + + return rp->status; +} + +static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (!rp->status) + memcpy(hdev->dev_class, sent, 3); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_set_class_of_dev_complete(hdev, sent, rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_voice_setting *rp = data; + __u16 setting; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + setting = __le16_to_cpu(rp->voice_setting); + + if (hdev->voice_setting == setting) + return rp->status; + + hdev->voice_setting = setting; + + bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting); + + if (hdev->notify) + hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING); + + return rp->status; +} + +static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + __u16 setting; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING); + if (!sent) + return rp->status; + + setting = get_unaligned_le16(sent); + + if (hdev->voice_setting == setting) + return rp->status; + + hdev->voice_setting = setting; + + bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting); + + if (hdev->notify) + hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING); + + return rp->status; +} + +static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_num_supported_iac *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->num_iac = rp->num_iac; + + bt_dev_dbg(hdev, "num iac %d", hdev->num_iac); + + return rp->status; +} + +static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_write_ssp_mode *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (!rp->status) { + if (sent->mode) + hdev->features[1][0] |= LMP_HOST_SSP; + else + hdev->features[1][0] &= ~LMP_HOST_SSP; + } + + if (!rp->status) { + if (sent->mode) + hci_dev_set_flag(hdev, HCI_SSP_ENABLED); + else + hci_dev_clear_flag(hdev, HCI_SSP_ENABLED); + } + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_write_sc_support *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (!rp->status) { + if (sent->support) + hdev->features[1][0] |= LMP_HOST_SC; + else + hdev->features[1][0] &= ~LMP_HOST_SC; + } + + if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) { + if (sent->support) + hci_dev_set_flag(hdev, HCI_SC_ENABLED); + else + hci_dev_clear_flag(hdev, HCI_SC_ENABLED); + } + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_version *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (hci_dev_test_flag(hdev, HCI_SETUP) || + hci_dev_test_flag(hdev, HCI_CONFIG)) { + hdev->hci_ver = rp->hci_ver; + hdev->hci_rev = __le16_to_cpu(rp->hci_rev); + hdev->lmp_ver = rp->lmp_ver; + hdev->manufacturer = __le16_to_cpu(rp->manufacturer); + hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver); + } + + return rp->status; +} + +static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_enc_key_size *rp = data; + struct hci_conn *conn; + u16 handle; + u8 status = rp->status; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + handle = le16_to_cpu(rp->handle); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, handle); + if (!conn) { + status = 0xFF; + goto done; + } + + /* While unexpected, the read_enc_key_size command may fail. The most + * secure approach is to then assume the key size is 0 to force a + * disconnection. + */ + if (status) { + bt_dev_err(hdev, "failed to read key size for handle %u", + handle); + conn->enc_key_size = 0; + } else { + conn->enc_key_size = rp->key_size; + status = 0; + + if (conn->enc_key_size < hdev->min_enc_key_size) { + /* As slave role, the conn->state has been set to + * BT_CONNECTED and l2cap conn req might not be received + * yet, at this moment the l2cap layer almost does + * nothing with the non-zero status. + * So we also clear encrypt related bits, and then the + * handler of l2cap conn req will get the right secure + * state at a later time. + */ + status = HCI_ERROR_AUTH_FAILURE; + clear_bit(HCI_CONN_ENCRYPT, &conn->flags); + clear_bit(HCI_CONN_AES_CCM, &conn->flags); + } + } + + hci_encrypt_cfm(conn, status); + +done: + hci_dev_unlock(hdev); + + return status; +} + +static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_commands *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (hci_dev_test_flag(hdev, HCI_SETUP) || + hci_dev_test_flag(hdev, HCI_CONFIG)) + memcpy(hdev->commands, rp->commands, sizeof(hdev->commands)); + + return rp->status; +} + +static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_auth_payload_to *rp = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (conn) + conn->auth_payload_timeout = __le16_to_cpu(rp->timeout); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_write_auth_payload_to *rp = data; + struct hci_conn *conn; + void *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (!conn) { + rp->status = 0xff; + goto unlock; + } + + if (!rp->status) + conn->auth_payload_timeout = get_unaligned_le16(sent + 2); + +unlock: + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_features *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + memcpy(hdev->features, rp->features, 8); + + /* Adjust default settings according to features + * supported by device. */ + + if (hdev->features[0][0] & LMP_3SLOT) + hdev->pkt_type |= (HCI_DM3 | HCI_DH3); + + if (hdev->features[0][0] & LMP_5SLOT) + hdev->pkt_type |= (HCI_DM5 | HCI_DH5); + + if (hdev->features[0][1] & LMP_HV2) { + hdev->pkt_type |= (HCI_HV2); + hdev->esco_type |= (ESCO_HV2); + } + + if (hdev->features[0][1] & LMP_HV3) { + hdev->pkt_type |= (HCI_HV3); + hdev->esco_type |= (ESCO_HV3); + } + + if (lmp_esco_capable(hdev)) + hdev->esco_type |= (ESCO_EV3); + + if (hdev->features[0][4] & LMP_EV4) + hdev->esco_type |= (ESCO_EV4); + + if (hdev->features[0][4] & LMP_EV5) + hdev->esco_type |= (ESCO_EV5); + + if (hdev->features[0][5] & LMP_EDR_ESCO_2M) + hdev->esco_type |= (ESCO_2EV3); + + if (hdev->features[0][5] & LMP_EDR_ESCO_3M) + hdev->esco_type |= (ESCO_3EV3); + + if (hdev->features[0][5] & LMP_EDR_3S_ESCO) + hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5); + + return rp->status; +} + +static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_ext_features *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (hdev->max_page < rp->max_page) { + if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2, + &hdev->quirks)) + bt_dev_warn(hdev, "broken local ext features page 2"); + else + hdev->max_page = rp->max_page; + } + + if (rp->page < HCI_MAX_PAGES) + memcpy(hdev->features[rp->page], rp->features, 8); + + return rp->status; +} + +static u8 hci_cc_read_flow_control_mode(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_flow_control_mode *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->flow_ctl_mode = rp->mode; + + return rp->status; +} + +static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_buffer_size *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu); + hdev->sco_mtu = rp->sco_mtu; + hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt); + hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt); + + if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) { + hdev->sco_mtu = 64; + hdev->sco_pkts = 8; + } + + hdev->acl_cnt = hdev->acl_pkts; + hdev->sco_cnt = hdev->sco_pkts; + + BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu, + hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts); + + return rp->status; +} + +static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_bd_addr *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (test_bit(HCI_INIT, &hdev->flags)) + bacpy(&hdev->bdaddr, &rp->bdaddr); + + if (hci_dev_test_flag(hdev, HCI_SETUP)) + bacpy(&hdev->setup_addr, &rp->bdaddr); + + return rp->status; +} + +static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_pairing_opts *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (hci_dev_test_flag(hdev, HCI_SETUP) || + hci_dev_test_flag(hdev, HCI_CONFIG)) { + hdev->pairing_opts = rp->pairing_opts; + hdev->max_enc_key_size = rp->max_key_size; + } + + return rp->status; +} + +static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_page_scan_activity *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (test_bit(HCI_INIT, &hdev->flags)) { + hdev->page_scan_interval = __le16_to_cpu(rp->interval); + hdev->page_scan_window = __le16_to_cpu(rp->window); + } + + return rp->status; +} + +static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_write_page_scan_activity *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY); + if (!sent) + return rp->status; + + hdev->page_scan_interval = __le16_to_cpu(sent->interval); + hdev->page_scan_window = __le16_to_cpu(sent->window); + + return rp->status; +} + +static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_page_scan_type *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (test_bit(HCI_INIT, &hdev->flags)) + hdev->page_scan_type = rp->type; + + return rp->status; +} + +static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + u8 *type; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE); + if (type) + hdev->page_scan_type = *type; + + return rp->status; +} + +static u8 hci_cc_read_data_block_size(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_data_block_size *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->block_mtu = __le16_to_cpu(rp->max_acl_len); + hdev->block_len = __le16_to_cpu(rp->block_len); + hdev->num_blocks = __le16_to_cpu(rp->num_blocks); + + hdev->block_cnt = hdev->num_blocks; + + BT_DBG("%s blk mtu %d cnt %d len %d", hdev->name, hdev->block_mtu, + hdev->block_cnt, hdev->block_len); + + return rp->status; +} + +static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_clock *rp = data; + struct hci_cp_read_clock *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + + cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK); + if (!cp) + goto unlock; + + if (cp->which == 0x00) { + hdev->clock = le32_to_cpu(rp->clock); + goto unlock; + } + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (conn) { + conn->clock = le32_to_cpu(rp->clock); + conn->clock_accuracy = le16_to_cpu(rp->accuracy); + } + +unlock: + hci_dev_unlock(hdev); + return rp->status; +} + +static u8 hci_cc_read_local_amp_info(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_amp_info *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->amp_status = rp->amp_status; + hdev->amp_total_bw = __le32_to_cpu(rp->total_bw); + hdev->amp_max_bw = __le32_to_cpu(rp->max_bw); + hdev->amp_min_latency = __le32_to_cpu(rp->min_latency); + hdev->amp_max_pdu = __le32_to_cpu(rp->max_pdu); + hdev->amp_type = rp->amp_type; + hdev->amp_pal_cap = __le16_to_cpu(rp->pal_cap); + hdev->amp_assoc_size = __le16_to_cpu(rp->max_assoc_size); + hdev->amp_be_flush_to = __le32_to_cpu(rp->be_flush_to); + hdev->amp_max_flush_to = __le32_to_cpu(rp->max_flush_to); + + return rp->status; +} + +static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_inq_rsp_tx_power *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->inq_tx_power = rp->tx_power; + + return rp->status; +} + +static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_def_err_data_reporting *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->err_data_reporting = rp->err_data_reporting; + + return rp->status; +} + +static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_write_def_err_data_reporting *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING); + if (!cp) + return rp->status; + + hdev->err_data_reporting = cp->err_data_reporting; + + return rp->status; +} + +static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_pin_code_reply *rp = data; + struct hci_cp_pin_code_reply *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status); + + if (rp->status) + goto unlock; + + cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY); + if (!cp) + goto unlock; + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); + if (conn) + conn->pin_length = cp->pin_len; + +unlock: + hci_dev_unlock(hdev); + return rp->status; +} + +static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_pin_code_neg_reply *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr, + rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_buffer_size *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->le_mtu = __le16_to_cpu(rp->le_mtu); + hdev->le_pkts = rp->le_max_pkt; + + hdev->le_cnt = hdev->le_pkts; + + BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts); + + return rp->status; +} + +static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_local_features *rp = data; + + BT_DBG("%s status 0x%2.2x", hdev->name, rp->status); + + if (rp->status) + return rp->status; + + memcpy(hdev->le_features, rp->features, 8); + + return rp->status; +} + +static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_adv_tx_power *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->adv_tx_power = rp->tx_power; + + return rp->status; +} + +static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_user_confirm_reply *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0, + rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_user_confirm_reply *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr, + ACL_LINK, 0, rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_user_confirm_reply *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK, + 0, rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_user_confirm_reply *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + hci_dev_lock(hdev); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr, + ACL_LINK, 0, rp->status); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_oob_data *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + return rp->status; +} + +static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_local_oob_ext_data *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + return rp->status; +} + +static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + bdaddr_t *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + bacpy(&hdev->random_addr, sent); + + if (!bacmp(&hdev->rpa, sent)) { + hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED); + queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, + secs_to_jiffies(hdev->rpa_timeout)); + } + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_le_set_default_phy *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + + hdev->le_tx_def_phys = cp->tx_phys; + hdev->le_rx_def_phys = cp->rx_phys; + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_le_set_adv_set_rand_addr *cp; + struct adv_info *adv; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR); + /* Update only in case the adv instance since handle 0x00 shall be using + * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and + * non-extended adverting. + */ + if (!cp || !cp->handle) + return rp->status; + + hci_dev_lock(hdev); + + adv = hci_find_adv_instance(hdev, cp->handle); + if (adv) { + bacpy(&adv->random_addr, &cp->bdaddr); + if (!bacmp(&hdev->rpa, &cp->bdaddr)) { + adv->rpa_expired = false; + queue_delayed_work(hdev->workqueue, + &adv->rpa_expired_cb, + secs_to_jiffies(hdev->rpa_timeout)); + } + } + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + u8 *instance; + int err; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET); + if (!instance) + return rp->status; + + hci_dev_lock(hdev); + + err = hci_remove_adv_instance(hdev, *instance); + if (!err) + mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev, + *instance); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct adv_info *adv, *n; + int err; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS)) + return rp->status; + + hci_dev_lock(hdev); + + list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { + u8 instance = adv->instance; + + err = hci_remove_adv_instance(hdev, instance); + if (!err) + mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), + hdev, instance); + } + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_transmit_power *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->min_le_tx_power = rp->min_le_tx_power; + hdev->max_le_tx_power = rp->max_le_tx_power; + + return rp->status; +} + +static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_le_set_privacy_mode *cp; + struct hci_conn_params *params; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + + params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type); + if (params) + WRITE_ONCE(params->privacy_mode, cp->mode); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + __u8 *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + /* If we're doing connection initiation as peripheral. Set a + * timeout in case something goes wrong. + */ + if (*sent) { + struct hci_conn *conn; + + hci_dev_set_flag(hdev, HCI_LE_ADV); + + conn = hci_lookup_le_connect(hdev); + if (conn) + queue_delayed_work(hdev->workqueue, + &conn->le_conn_timeout, + conn->conn_timeout); + } else { + hci_dev_clear_flag(hdev, HCI_LE_ADV); + } + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_set_ext_adv_enable *cp; + struct hci_cp_ext_adv_set *set; + struct adv_info *adv = NULL, *n; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE); + if (!cp) + return rp->status; + + set = (void *)cp->data; + + hci_dev_lock(hdev); + + if (cp->num_of_sets) + adv = hci_find_adv_instance(hdev, set->handle); + + if (cp->enable) { + struct hci_conn *conn; + + hci_dev_set_flag(hdev, HCI_LE_ADV); + + if (adv && !adv->periodic) + adv->enabled = true; + + conn = hci_lookup_le_connect(hdev); + if (conn) + queue_delayed_work(hdev->workqueue, + &conn->le_conn_timeout, + conn->conn_timeout); + } else { + if (cp->num_of_sets) { + if (adv) + adv->enabled = false; + + /* If just one instance was disabled check if there are + * any other instance enabled before clearing HCI_LE_ADV + */ + list_for_each_entry_safe(adv, n, &hdev->adv_instances, + list) { + if (adv->enabled) + goto unlock; + } + } else { + /* All instances shall be considered disabled */ + list_for_each_entry_safe(adv, n, &hdev->adv_instances, + list) + adv->enabled = false; + } + + hci_dev_clear_flag(hdev, HCI_LE_ADV); + } + +unlock: + hci_dev_unlock(hdev); + return rp->status; +} + +static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_set_scan_param *cp; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + + hdev->le_scan_type = cp->type; + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_set_ext_scan_params *cp; + struct hci_ev_status *rp = data; + struct hci_cp_le_scan_phy_params *phy_param; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS); + if (!cp) + return rp->status; + + phy_param = (void *)cp->data; + + hci_dev_lock(hdev); + + hdev->le_scan_type = phy_param->type; + + hci_dev_unlock(hdev); + + return rp->status; +} + +static bool has_pending_adv_report(struct hci_dev *hdev) +{ + struct discovery_state *d = &hdev->discovery; + + return bacmp(&d->last_adv_addr, BDADDR_ANY); +} + +static void clear_pending_adv_report(struct hci_dev *hdev) +{ + struct discovery_state *d = &hdev->discovery; + + bacpy(&d->last_adv_addr, BDADDR_ANY); + d->last_adv_data_len = 0; +} + +static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr, + u8 bdaddr_type, s8 rssi, u32 flags, + u8 *data, u8 len) +{ + struct discovery_state *d = &hdev->discovery; + + if (len > max_adv_len(hdev)) + return; + + bacpy(&d->last_adv_addr, bdaddr); + d->last_adv_addr_type = bdaddr_type; + d->last_adv_rssi = rssi; + d->last_adv_flags = flags; + memcpy(d->last_adv_data, data, len); + d->last_adv_data_len = len; +} + +static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable) +{ + hci_dev_lock(hdev); + + switch (enable) { + case LE_SCAN_ENABLE: + hci_dev_set_flag(hdev, HCI_LE_SCAN); + if (hdev->le_scan_type == LE_SCAN_ACTIVE) + clear_pending_adv_report(hdev); + if (hci_dev_test_flag(hdev, HCI_MESH)) + hci_discovery_set_state(hdev, DISCOVERY_FINDING); + break; + + case LE_SCAN_DISABLE: + /* We do this here instead of when setting DISCOVERY_STOPPED + * since the latter would potentially require waiting for + * inquiry to stop too. + */ + if (has_pending_adv_report(hdev)) { + struct discovery_state *d = &hdev->discovery; + + mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, + d->last_adv_addr_type, NULL, + d->last_adv_rssi, d->last_adv_flags, + d->last_adv_data, + d->last_adv_data_len, NULL, 0, 0); + } + + /* Cancel this timer so that we don't try to disable scanning + * when it's already disabled. + */ + cancel_delayed_work(&hdev->le_scan_disable); + + hci_dev_clear_flag(hdev, HCI_LE_SCAN); + + /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we + * interrupted scanning due to a connect request. Mark + * therefore discovery as stopped. + */ + if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED)) + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) && + hdev->discovery.state == DISCOVERY_FINDING) + queue_work(hdev->workqueue, &hdev->reenable_adv_work); + + break; + + default: + bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d", + enable); + break; + } + + hci_dev_unlock(hdev); +} + +static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_set_scan_enable *cp; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE); + if (!cp) + return rp->status; + + le_set_scan_enable_complete(hdev, cp->enable); + + return rp->status; +} + +static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_set_ext_scan_enable *cp; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE); + if (!cp) + return rp->status; + + le_set_scan_enable_complete(hdev, cp->enable); + + return rp->status; +} + +static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_num_supported_adv_sets *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status, + rp->num_of_sets); + + if (rp->status) + return rp->status; + + hdev->le_num_of_adv_sets = rp->num_of_sets; + + return rp->status; +} + +static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_accept_list_size *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size); + + if (rp->status) + return rp->status; + + hdev->le_accept_list_size = rp->size; + + return rp->status; +} + +static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + hci_bdaddr_list_clear(&hdev->le_accept_list); + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_add_to_accept_list *sent; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr, + sent->bdaddr_type); + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_del_from_accept_list *sent; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr, + sent->bdaddr_type); + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_supported_states *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + memcpy(hdev->le_states, rp->le_states, 8); + + return rp->status; +} + +static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_def_data_len *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->le_def_tx_len = le16_to_cpu(rp->tx_len); + hdev->le_def_tx_time = le16_to_cpu(rp->tx_time); + + return rp->status; +} + +static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_write_def_data_len *sent; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN); + if (!sent) + return rp->status; + + hdev->le_def_tx_len = le16_to_cpu(sent->tx_len); + hdev->le_def_tx_time = le16_to_cpu(sent->tx_time); + + return rp->status; +} + +static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_add_to_resolv_list *sent; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr, + sent->bdaddr_type, sent->peer_irk, + sent->local_irk); + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_del_from_resolv_list *sent; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr, + sent->bdaddr_type); + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + hci_bdaddr_list_clear(&hdev->le_resolv_list); + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_resolv_list_size *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size); + + if (rp->status) + return rp->status; + + hdev->le_resolv_list_size = rp->size; + + return rp->status; +} + +static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + __u8 *sent; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (*sent) + hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION); + else + hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_max_data_len *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->le_max_tx_len = le16_to_cpu(rp->tx_len); + hdev->le_max_tx_time = le16_to_cpu(rp->tx_time); + hdev->le_max_rx_len = le16_to_cpu(rp->rx_len); + hdev->le_max_rx_time = le16_to_cpu(rp->rx_time); + + return rp->status; +} + +static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_write_le_host_supported *sent; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + if (sent->le) { + hdev->features[1][0] |= LMP_HOST_LE; + hci_dev_set_flag(hdev, HCI_LE_ENABLED); + } else { + hdev->features[1][0] &= ~LMP_HOST_LE; + hci_dev_clear_flag(hdev, HCI_LE_ENABLED); + hci_dev_clear_flag(hdev, HCI_ADVERTISING); + } + + if (sent->simul) + hdev->features[1][0] |= LMP_HOST_LE_BREDR; + else + hdev->features[1][0] &= ~LMP_HOST_LE_BREDR; + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_le_set_adv_param *cp; + struct hci_ev_status *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + hdev->adv_addr_type = cp->own_address_type; + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_set_ext_adv_params *rp = data; + struct hci_cp_le_set_ext_adv_params *cp; + struct adv_info *adv_instance; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + hdev->adv_addr_type = cp->own_addr_type; + if (!cp->handle) { + /* Store in hdev for instance 0 */ + hdev->adv_tx_power = rp->tx_power; + } else { + adv_instance = hci_find_adv_instance(hdev, cp->handle); + if (adv_instance) + adv_instance->tx_power = rp->tx_power; + } + /* Update adv data as tx power is known now */ + hci_update_adv_data(hdev, cp->handle); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_read_rssi *rp = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (conn) + conn->rssi = rp->rssi; + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_cp_read_tx_power *sent; + struct hci_rp_read_tx_power *rp = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER); + if (!sent) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); + if (!conn) + goto unlock; + + switch (sent->type) { + case 0x00: + conn->tx_power = rp->tx_power; + break; + case 0x01: + conn->max_tx_power = rp->tx_power; + break; + } + +unlock: + hci_dev_unlock(hdev); + return rp->status; +} + +static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + u8 *mode; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE); + if (mode) + hdev->ssp_debug_mode = *mode; + + return rp->status; +} + +static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status) +{ + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (status) { + hci_conn_check_pending(hdev); + return; + } + + if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY)) + set_bit(HCI_INQUIRY, &hdev->flags); +} + +static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_create_conn *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); + + bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn); + + if (status) { + if (conn && conn->state == BT_CONNECT) { + if (status != 0x0c || conn->attempt > 2) { + conn->state = BT_CLOSED; + hci_connect_cfm(conn, status); + hci_conn_del(conn); + } else + conn->state = BT_CONNECT2; + } + } else { + if (!conn) { + conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr, + HCI_ROLE_MASTER); + if (!conn) + bt_dev_err(hdev, "no memory for new connection"); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_add_sco *cp; + struct hci_conn *acl; + struct hci_link *link; + __u16 handle; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO); + if (!cp) + return; + + handle = __le16_to_cpu(cp->handle); + + bt_dev_dbg(hdev, "handle 0x%4.4x", handle); + + hci_dev_lock(hdev); + + acl = hci_conn_hash_lookup_handle(hdev, handle); + if (acl) { + link = list_first_entry_or_null(&acl->link_list, + struct hci_link, list); + if (link && link->conn) { + link->conn->state = BT_CLOSED; + + hci_connect_cfm(link->conn, status); + hci_conn_del(link->conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_auth_requested *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (conn) { + if (conn->state == BT_CONFIG) { + hci_connect_cfm(conn, status); + hci_conn_drop(conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_set_conn_encrypt *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (conn) { + if (conn->state == BT_CONFIG) { + hci_connect_cfm(conn, status); + hci_conn_drop(conn); + } + } + + hci_dev_unlock(hdev); +} + +static int hci_outgoing_auth_needed(struct hci_dev *hdev, + struct hci_conn *conn) +{ + if (conn->state != BT_CONFIG || !conn->out) + return 0; + + if (conn->pending_sec_level == BT_SECURITY_SDP) + return 0; + + /* Only request authentication for SSP connections or non-SSP + * devices with sec_level MEDIUM or HIGH or if MITM protection + * is requested. + */ + if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) && + conn->pending_sec_level != BT_SECURITY_FIPS && + conn->pending_sec_level != BT_SECURITY_HIGH && + conn->pending_sec_level != BT_SECURITY_MEDIUM) + return 0; + + return 1; +} + +static int hci_resolve_name(struct hci_dev *hdev, + struct inquiry_entry *e) +{ + struct hci_cp_remote_name_req cp; + + memset(&cp, 0, sizeof(cp)); + + bacpy(&cp.bdaddr, &e->data.bdaddr); + cp.pscan_rep_mode = e->data.pscan_rep_mode; + cp.pscan_mode = e->data.pscan_mode; + cp.clock_offset = e->data.clock_offset; + + return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); +} + +static bool hci_resolve_next_name(struct hci_dev *hdev) +{ + struct discovery_state *discov = &hdev->discovery; + struct inquiry_entry *e; + + if (list_empty(&discov->resolve)) + return false; + + /* We should stop if we already spent too much time resolving names. */ + if (time_after(jiffies, discov->name_resolve_timeout)) { + bt_dev_warn_ratelimited(hdev, "Name resolve takes too long."); + return false; + } + + e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED); + if (!e) + return false; + + if (hci_resolve_name(hdev, e) == 0) { + e->name_state = NAME_PENDING; + return true; + } + + return false; +} + +static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn, + bdaddr_t *bdaddr, u8 *name, u8 name_len) +{ + struct discovery_state *discov = &hdev->discovery; + struct inquiry_entry *e; + + /* Update the mgmt connected state if necessary. Be careful with + * conn objects that exist but are not (yet) connected however. + * Only those in BT_CONFIG or BT_CONNECTED states can be + * considered connected. + */ + if (conn && + (conn->state == BT_CONFIG || conn->state == BT_CONNECTED) && + !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) + mgmt_device_connected(hdev, conn, name, name_len); + + if (discov->state == DISCOVERY_STOPPED) + return; + + if (discov->state == DISCOVERY_STOPPING) + goto discov_complete; + + if (discov->state != DISCOVERY_RESOLVING) + return; + + e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING); + /* If the device was not found in a list of found devices names of which + * are pending. there is no need to continue resolving a next name as it + * will be done upon receiving another Remote Name Request Complete + * Event */ + if (!e) + return; + + list_del(&e->list); + + e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN; + mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi, + name, name_len); + + if (hci_resolve_next_name(hdev)) + return; + +discov_complete: + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); +} + +static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_remote_name_req *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + /* If successful wait for the name req complete event before + * checking for the need to do authentication */ + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0); + + if (!conn) + goto unlock; + + if (!hci_outgoing_auth_needed(hdev, conn)) + goto unlock; + + if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { + struct hci_cp_auth_requested auth_cp; + + set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); + + auth_cp.handle = __cpu_to_le16(conn->handle); + hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, + sizeof(auth_cp), &auth_cp); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_read_remote_features *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (conn) { + if (conn->state == BT_CONFIG) { + hci_connect_cfm(conn, status); + hci_conn_drop(conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_read_remote_ext_features *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (conn) { + if (conn->state == BT_CONFIG) { + hci_connect_cfm(conn, status); + hci_conn_drop(conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle, + __u8 status) +{ + struct hci_conn *acl; + struct hci_link *link; + + bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status); + + hci_dev_lock(hdev); + + acl = hci_conn_hash_lookup_handle(hdev, handle); + if (acl) { + link = list_first_entry_or_null(&acl->link_list, + struct hci_link, list); + if (link && link->conn) { + link->conn->state = BT_CLOSED; + + hci_connect_cfm(link->conn, status); + hci_conn_del(link->conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_setup_sync_conn *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN); + if (!cp) + return; + + hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status); +} + +static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_enhanced_setup_sync_conn *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN); + if (!cp) + return; + + hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status); +} + +static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_sniff_mode *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE); + if (!cp) + return; + + 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->flags); + + if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) + hci_sco_setup(conn, status); + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status) +{ + struct hci_cp_exit_sniff_mode *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE); + if (!cp) + return; + + 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->flags); + + if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) + hci_sco_setup(conn, status); + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_disconnect(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_disconnect *cp; + struct hci_conn_params *params; + struct hci_conn *conn; + bool mgmt_conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended + * otherwise cleanup the connection immediately. + */ + if (!status && !hdev->suspended) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (!conn) + goto unlock; + + if (status) { + mgmt_disconnect_failed(hdev, &conn->dst, conn->type, + conn->dst_type, status); + + if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) { + hdev->cur_adv_instance = conn->adv_instance; + hci_enable_advertising(hdev); + } + + /* Inform sockets conn is gone before we delete it */ + hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED); + + goto done; + } + + mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags); + + if (conn->type == ACL_LINK) { + if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) + hci_remove_link_key(hdev, &conn->dst); + } + + params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); + if (params) { + switch (params->auto_connect) { + case HCI_AUTO_CONN_LINK_LOSS: + if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT) + break; + fallthrough; + + case HCI_AUTO_CONN_DIRECT: + case HCI_AUTO_CONN_ALWAYS: + hci_pend_le_list_del_init(params); + hci_pend_le_list_add(params, &hdev->pend_le_conns); + break; + + default: + break; + } + } + + mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type, + cp->reason, mgmt_conn); + + hci_disconn_cfm(conn, cp->reason); + +done: + /* If the disconnection failed for any reason, the upper layer + * does not retry to disconnect in current implementation. + * Hence, we need to do some basic cleanup here and re-enable + * advertising if necessary. + */ + hci_conn_del(conn); +unlock: + hci_dev_unlock(hdev); +} + +static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved) +{ + /* When using controller based address resolution, then the new + * address types 0x02 and 0x03 are used. These types need to be + * converted back into either public address or random address type + */ + switch (type) { + case ADDR_LE_DEV_PUBLIC_RESOLVED: + if (resolved) + *resolved = true; + return ADDR_LE_DEV_PUBLIC; + case ADDR_LE_DEV_RANDOM_RESOLVED: + if (resolved) + *resolved = true; + return ADDR_LE_DEV_RANDOM; + } + + if (resolved) + *resolved = false; + return type; +} + +static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr, + u8 peer_addr_type, u8 own_address_type, + u8 filter_policy) +{ + struct hci_conn *conn; + + conn = hci_conn_hash_lookup_le(hdev, peer_addr, + peer_addr_type); + if (!conn) + return; + + own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL); + + /* Store the initiator and responder address information which + * is needed for SMP. These values will not change during the + * lifetime of the connection. + */ + conn->init_addr_type = own_address_type; + if (own_address_type == ADDR_LE_DEV_RANDOM) + bacpy(&conn->init_addr, &hdev->random_addr); + else + bacpy(&conn->init_addr, &hdev->bdaddr); + + conn->resp_addr_type = peer_addr_type; + bacpy(&conn->resp_addr, peer_addr); +} + +static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_le_create_conn *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + /* All connection failure handling is taken care of by the + * hci_conn_failed function which is triggered by the HCI + * request completion callbacks used for connecting. + */ + if (status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN); + if (!cp) + return; + + hci_dev_lock(hdev); + + cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type, + cp->own_address_type, cp->filter_policy); + + hci_dev_unlock(hdev); +} + +static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_le_ext_create_conn *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + /* All connection failure handling is taken care of by the + * hci_conn_failed function which is triggered by the HCI + * request completion callbacks used for connecting. + */ + if (status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN); + if (!cp) + return; + + hci_dev_lock(hdev); + + cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type, + cp->own_addr_type, cp->filter_policy); + + hci_dev_unlock(hdev); +} + +static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_le_read_remote_features *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (conn) { + if (conn->state == BT_CONFIG) { + hci_connect_cfm(conn, status); + hci_conn_drop(conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_le_start_enc *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + hci_dev_lock(hdev); + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC); + if (!cp) + goto unlock; + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (!conn) + goto unlock; + + if (conn->state != BT_CONNECTED) + goto unlock; + + hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); + hci_conn_drop(conn); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_cs_switch_role(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_switch_role *cp; + struct hci_conn *conn; + + BT_DBG("%s status 0x%2.2x", hdev->name, status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE); + if (!cp) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); + if (conn) + clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags); + + hci_dev_unlock(hdev); +} + +static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *ev = data; + struct discovery_state *discov = &hdev->discovery; + struct inquiry_entry *e; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_conn_check_pending(hdev); + + if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags)) + return; + + smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */ + wake_up_bit(&hdev->flags, HCI_INQUIRY); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + return; + + hci_dev_lock(hdev); + + if (discov->state != DISCOVERY_FINDING) + goto unlock; + + if (list_empty(&discov->resolve)) { + /* When BR/EDR inquiry is active and no LE scanning is in + * progress, then change discovery state to indicate completion. + * + * When running LE scanning and BR/EDR inquiry simultaneously + * and the LE scan already finished, then change the discovery + * state to indicate completion. + */ + if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || + !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + goto unlock; + } + + e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED); + if (e && hci_resolve_name(hdev, e) == 0) { + e->name_state = NAME_PENDING; + hci_discovery_set_state(hdev, DISCOVERY_RESOLVING); + discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION; + } else { + /* When BR/EDR inquiry is active and no LE scanning is in + * progress, then change discovery state to indicate completion. + * + * When running LE scanning and BR/EDR inquiry simultaneously + * and the LE scan already finished, then change the discovery + * state to indicate completion. + */ + if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || + !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata, + struct sk_buff *skb) +{ + struct hci_ev_inquiry_result *ev = edata; + struct inquiry_data data; + int i; + + if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT, + flex_array_size(ev, info, ev->num))) + return; + + bt_dev_dbg(hdev, "num %d", ev->num); + + if (!ev->num) + return; + + if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) + return; + + hci_dev_lock(hdev); + + for (i = 0; i < ev->num; i++) { + struct inquiry_info *info = &ev->info[i]; + u32 flags; + + bacpy(&data.bdaddr, &info->bdaddr); + data.pscan_rep_mode = info->pscan_rep_mode; + data.pscan_period_mode = info->pscan_period_mode; + data.pscan_mode = info->pscan_mode; + memcpy(data.dev_class, info->dev_class, 3); + data.clock_offset = info->clock_offset; + data.rssi = HCI_RSSI_INVALID; + data.ssp_mode = 0x00; + + flags = hci_inquiry_cache_update(hdev, &data, false); + + mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, + info->dev_class, HCI_RSSI_INVALID, + flags, NULL, 0, NULL, 0, 0); + } + + hci_dev_unlock(hdev); +} + +static void hci_conn_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_conn_complete *ev = data; + struct hci_conn *conn; + u8 status = ev->status; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr); + if (!conn) { + /* In case of error status and there is no connection pending + * just unlock as there is nothing to cleanup. + */ + if (ev->status) + goto unlock; + + /* Connection may not exist if auto-connected. Check the bredr + * allowlist to see if this device is allowed to auto connect. + * If link is an ACL type, create a connection class + * automatically. + * + * Auto-connect will only occur if the event filter is + * programmed with a given address. Right now, event filter is + * only used during suspend. + */ + if (ev->link_type == ACL_LINK && + hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, + &ev->bdaddr, + BDADDR_BREDR)) { + conn = hci_conn_add_unset(hdev, ev->link_type, + &ev->bdaddr, HCI_ROLE_SLAVE); + if (!conn) { + bt_dev_err(hdev, "no memory for new conn"); + goto unlock; + } + } else { + if (ev->link_type != SCO_LINK) + goto unlock; + + conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, + &ev->bdaddr); + if (!conn) + goto unlock; + + conn->type = SCO_LINK; + } + } + + /* The HCI_Connection_Complete event is only sent once per connection. + * Processing it more than once per connection can corrupt kernel memory. + * + * As the connection handle is set here for the first time, it indicates + * whether the connection is already set up. + */ + if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { + bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection"); + goto unlock; + } + + if (!status) { + status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle)); + if (status) + goto done; + + if (conn->type == ACL_LINK) { + conn->state = BT_CONFIG; + hci_conn_hold(conn); + + if (!conn->out && !hci_conn_ssp_enabled(conn) && + !hci_find_link_key(hdev, &ev->bdaddr)) + conn->disc_timeout = HCI_PAIRING_TIMEOUT; + else + conn->disc_timeout = HCI_DISCONN_TIMEOUT; + } else + conn->state = BT_CONNECTED; + + hci_debugfs_create_conn(conn); + hci_conn_add_sysfs(conn); + + if (test_bit(HCI_AUTH, &hdev->flags)) + set_bit(HCI_CONN_AUTH, &conn->flags); + + if (test_bit(HCI_ENCRYPT, &hdev->flags)) + set_bit(HCI_CONN_ENCRYPT, &conn->flags); + + /* Get remote features */ + if (conn->type == ACL_LINK) { + struct hci_cp_read_remote_features cp; + cp.handle = ev->handle; + hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES, + sizeof(cp), &cp); + + hci_update_scan(hdev); + } + + /* Set packet type for incoming connection */ + if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) { + struct hci_cp_change_conn_ptype cp; + cp.handle = ev->handle; + cp.pkt_type = cpu_to_le16(conn->pkt_type); + hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp), + &cp); + } + } + + if (conn->type == ACL_LINK) + hci_sco_setup(conn, ev->status); + +done: + if (status) { + hci_conn_failed(conn, status); + } else if (ev->link_type == SCO_LINK) { + switch (conn->setting & SCO_AIRMODE_MASK) { + case SCO_AIRMODE_CVSD: + if (hdev->notify) + hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD); + break; + } + + hci_connect_cfm(conn, status); + } + +unlock: + hci_dev_unlock(hdev); + + hci_conn_check_pending(hdev); +} + +static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr) +{ + struct hci_cp_reject_conn_req cp; + + bacpy(&cp.bdaddr, bdaddr); + cp.reason = HCI_ERROR_REJ_BAD_ADDR; + hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp); +} + +static void hci_conn_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_conn_request *ev = data; + int mask = hdev->link_mode; + struct inquiry_entry *ie; + struct hci_conn *conn; + __u8 flags = 0; + + bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type); + + /* Reject incoming connection from device with same BD ADDR against + * CVE-2020-26555 + */ + if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) { + bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n", + &ev->bdaddr); + hci_reject_conn(hdev, &ev->bdaddr); + return; + } + + mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type, + &flags); + + if (!(mask & HCI_LM_ACCEPT)) { + hci_reject_conn(hdev, &ev->bdaddr); + return; + } + + hci_dev_lock(hdev); + + if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr, + BDADDR_BREDR)) { + hci_reject_conn(hdev, &ev->bdaddr); + goto unlock; + } + + /* Require HCI_CONNECTABLE or an accept list entry to accept the + * connection. These features are only touched through mgmt so + * only do the checks if HCI_MGMT is set. + */ + if (hci_dev_test_flag(hdev, HCI_MGMT) && + !hci_dev_test_flag(hdev, HCI_CONNECTABLE) && + !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr, + BDADDR_BREDR)) { + hci_reject_conn(hdev, &ev->bdaddr); + goto unlock; + } + + /* Connection accepted */ + + ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); + if (ie) + memcpy(ie->data.dev_class, ev->dev_class, 3); + + conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, + &ev->bdaddr); + if (!conn) { + conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr, + HCI_ROLE_SLAVE); + if (!conn) { + bt_dev_err(hdev, "no memory for new connection"); + goto unlock; + } + } + + memcpy(conn->dev_class, ev->dev_class, 3); + + hci_dev_unlock(hdev); + + if (ev->link_type == ACL_LINK || + (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) { + struct hci_cp_accept_conn_req cp; + conn->state = BT_CONNECT; + + bacpy(&cp.bdaddr, &ev->bdaddr); + + if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER)) + cp.role = 0x00; /* Become central */ + else + cp.role = 0x01; /* Remain peripheral */ + + hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); + } else if (!(flags & HCI_PROTO_DEFER)) { + struct hci_cp_accept_sync_conn_req cp; + conn->state = BT_CONNECT; + + bacpy(&cp.bdaddr, &ev->bdaddr); + 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.content_format = cpu_to_le16(hdev->voice_setting); + cp.retrans_effort = 0xff; + + hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp), + &cp); + } else { + conn->state = BT_CONNECT2; + hci_connect_cfm(conn, 0); + } + + return; +unlock: + hci_dev_unlock(hdev); +} + +static u8 hci_to_mgmt_reason(u8 err) +{ + switch (err) { + case HCI_ERROR_CONNECTION_TIMEOUT: + return MGMT_DEV_DISCONN_TIMEOUT; + case HCI_ERROR_REMOTE_USER_TERM: + case HCI_ERROR_REMOTE_LOW_RESOURCES: + case HCI_ERROR_REMOTE_POWER_OFF: + return MGMT_DEV_DISCONN_REMOTE; + case HCI_ERROR_LOCAL_HOST_TERM: + return MGMT_DEV_DISCONN_LOCAL_HOST; + default: + return MGMT_DEV_DISCONN_UNKNOWN; + } +} + +static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_disconn_complete *ev = data; + u8 reason; + struct hci_conn_params *params; + struct hci_conn *conn; + bool mgmt_connected; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + if (ev->status) { + mgmt_disconnect_failed(hdev, &conn->dst, conn->type, + conn->dst_type, ev->status); + goto unlock; + } + + conn->state = BT_CLOSED; + + mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags); + + if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags)) + reason = MGMT_DEV_DISCONN_AUTH_FAILURE; + else + reason = hci_to_mgmt_reason(ev->reason); + + mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type, + reason, mgmt_connected); + + if (conn->type == ACL_LINK) { + if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) + hci_remove_link_key(hdev, &conn->dst); + + hci_update_scan(hdev); + } + + params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); + if (params) { + switch (params->auto_connect) { + case HCI_AUTO_CONN_LINK_LOSS: + if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT) + break; + fallthrough; + + case HCI_AUTO_CONN_DIRECT: + case HCI_AUTO_CONN_ALWAYS: + hci_pend_le_list_del_init(params); + hci_pend_le_list_add(params, &hdev->pend_le_conns); + hci_update_passive_scan(hdev); + break; + + default: + break; + } + } + + hci_disconn_cfm(conn, ev->reason); + + /* Re-enable advertising if necessary, since it might + * have been disabled by the connection. From the + * HCI_LE_Set_Advertise_Enable command description in + * the core specification (v4.0): + * "The Controller shall continue advertising until the Host + * issues an LE_Set_Advertise_Enable command with + * Advertising_Enable set to 0x00 (Advertising is disabled) + * or until a connection is created or until the Advertising + * is timed out due to Directed Advertising." + */ + if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) { + hdev->cur_adv_instance = conn->adv_instance; + hci_enable_advertising(hdev); + } + + hci_conn_del(conn); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_auth_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_auth_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + if (!ev->status) { + clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); + set_bit(HCI_CONN_AUTH, &conn->flags); + conn->sec_level = conn->pending_sec_level; + } else { + if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING) + set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); + + mgmt_auth_failed(conn, ev->status); + } + + clear_bit(HCI_CONN_AUTH_PEND, &conn->flags); + + if (conn->state == BT_CONFIG) { + if (!ev->status && hci_conn_ssp_enabled(conn)) { + struct hci_cp_set_conn_encrypt cp; + cp.handle = ev->handle; + cp.encrypt = 0x01; + hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), + &cp); + } else { + conn->state = BT_CONNECTED; + hci_connect_cfm(conn, ev->status); + hci_conn_drop(conn); + } + } else { + hci_auth_cfm(conn, ev->status); + + hci_conn_hold(conn); + conn->disc_timeout = HCI_DISCONN_TIMEOUT; + hci_conn_drop(conn); + } + + if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { + if (!ev->status) { + struct hci_cp_set_conn_encrypt cp; + cp.handle = ev->handle; + cp.encrypt = 0x01; + hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), + &cp); + } else { + clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); + hci_encrypt_cfm(conn, ev->status); + } + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_remote_name_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_remote_name *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_conn_check_pending(hdev); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + goto check_auth; + + if (ev->status == 0) + hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name, + strnlen(ev->name, HCI_MAX_NAME_LENGTH)); + else + hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0); + +check_auth: + if (!conn) + goto unlock; + + if (!hci_outgoing_auth_needed(hdev, conn)) + goto unlock; + + if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { + struct hci_cp_auth_requested cp; + + set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); + + cp.handle = __cpu_to_le16(conn->handle); + hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_encrypt_change *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + if (!ev->status) { + if (ev->encrypt) { + /* Encryption implies authentication */ + set_bit(HCI_CONN_AUTH, &conn->flags); + set_bit(HCI_CONN_ENCRYPT, &conn->flags); + conn->sec_level = conn->pending_sec_level; + + /* P-256 authentication key implies FIPS */ + if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256) + set_bit(HCI_CONN_FIPS, &conn->flags); + + if ((conn->type == ACL_LINK && ev->encrypt == 0x02) || + conn->type == LE_LINK) + set_bit(HCI_CONN_AES_CCM, &conn->flags); + } else { + clear_bit(HCI_CONN_ENCRYPT, &conn->flags); + clear_bit(HCI_CONN_AES_CCM, &conn->flags); + } + } + + /* We should disregard the current RPA and generate a new one + * whenever the encryption procedure fails. + */ + if (ev->status && conn->type == LE_LINK) { + hci_dev_set_flag(hdev, HCI_RPA_EXPIRED); + hci_adv_instances_set_rpa_expired(hdev, true); + } + + clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); + + /* Check link security requirements are met */ + if (!hci_conn_check_link_mode(conn)) + ev->status = HCI_ERROR_AUTH_FAILURE; + + if (ev->status && conn->state == BT_CONNECTED) { + if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING) + set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); + + /* Notify upper layers so they can cleanup before + * disconnecting. + */ + hci_encrypt_cfm(conn, ev->status); + hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); + hci_conn_drop(conn); + goto unlock; + } + + /* Try reading the encryption key size for encrypted ACL links */ + if (!ev->status && ev->encrypt && conn->type == ACL_LINK) { + struct hci_cp_read_enc_key_size cp; + + /* Only send HCI_Read_Encryption_Key_Size if the + * controller really supports it. If it doesn't, assume + * the default size (16). + */ + if (!(hdev->commands[20] & 0x10)) { + conn->enc_key_size = HCI_LINK_KEY_SIZE; + goto notify; + } + + cp.handle = cpu_to_le16(conn->handle); + if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE, + sizeof(cp), &cp)) { + bt_dev_err(hdev, "sending read key size failed"); + conn->enc_key_size = HCI_LINK_KEY_SIZE; + goto notify; + } + + goto unlock; + } + + /* Set the default Authenticated Payload Timeout after + * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B + * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be + * sent when the link is active and Encryption is enabled, the conn + * type can be either LE or ACL and controller must support LMP Ping. + * Ensure for AES-CCM encryption as well. + */ + if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) && + test_bit(HCI_CONN_AES_CCM, &conn->flags) && + ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) || + (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) { + struct hci_cp_write_auth_payload_to cp; + + cp.handle = cpu_to_le16(conn->handle); + cp.timeout = cpu_to_le16(hdev->auth_payload_timeout); + if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO, + sizeof(cp), &cp)) + bt_dev_err(hdev, "write auth payload timeout failed"); + } + +notify: + hci_encrypt_cfm(conn, ev->status); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_change_link_key_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (conn) { + if (!ev->status) + set_bit(HCI_CONN_SECURE, &conn->flags); + + clear_bit(HCI_CONN_AUTH_PEND, &conn->flags); + + hci_key_change_cfm(conn, ev->status); + } + + hci_dev_unlock(hdev); +} + +static void hci_remote_features_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_remote_features *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + if (!ev->status) + memcpy(conn->features[0], ev->features, 8); + + if (conn->state != BT_CONFIG) + goto unlock; + + if (!ev->status && lmp_ext_feat_capable(hdev) && + lmp_ext_feat_capable(conn)) { + struct hci_cp_read_remote_ext_features cp; + cp.handle = ev->handle; + cp.page = 0x01; + hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES, + sizeof(cp), &cp); + goto unlock; + } + + if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) { + struct hci_cp_remote_name_req cp; + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, &conn->dst); + cp.pscan_rep_mode = 0x02; + hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); + } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) + mgmt_device_connected(hdev, conn, NULL, 0); + + if (!hci_outgoing_auth_needed(hdev, conn)) { + conn->state = BT_CONNECTED; + hci_connect_cfm(conn, ev->status); + hci_conn_drop(conn); + } + +unlock: + hci_dev_unlock(hdev); +} + +static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd) +{ + cancel_delayed_work(&hdev->cmd_timer); + + rcu_read_lock(); + if (!test_bit(HCI_RESET, &hdev->flags)) { + if (ncmd) { + cancel_delayed_work(&hdev->ncmd_timer); + atomic_set(&hdev->cmd_cnt, 1); + } else { + if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) + queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer, + HCI_NCMD_TIMEOUT); + } + } + rcu_read_unlock(); +} + +static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_read_buffer_size_v2 *rp = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + hdev->le_mtu = __le16_to_cpu(rp->acl_mtu); + hdev->le_pkts = rp->acl_max_pkt; + hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu); + hdev->iso_pkts = rp->iso_max_pkt; + + hdev->le_cnt = hdev->le_pkts; + hdev->iso_cnt = hdev->iso_pkts; + + BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu, + hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts); + + return rp->status; +} + +static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status) +{ + struct hci_conn *conn, *tmp; + + lockdep_assert_held(&hdev->lock); + + list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) { + if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) || + conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig) + continue; + + if (HCI_CONN_HANDLE_UNSET(conn->handle)) + hci_conn_failed(conn, status); + } +} + +static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_set_cig_params *rp = data; + struct hci_cp_le_set_cig_params *cp; + struct hci_conn *conn; + u8 status = rp->status; + bool pending = false; + int i; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS); + if (!rp->status && (!cp || rp->num_handles != cp->num_cis || + rp->cig_id != cp->cig_id)) { + bt_dev_err(hdev, "unexpected Set CIG Parameters response data"); + status = HCI_ERROR_UNSPECIFIED; + } + + hci_dev_lock(hdev); + + /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554 + * + * If the Status return parameter is non-zero, then the state of the CIG + * and its CIS configurations shall not be changed by the command. If + * the CIG did not already exist, it shall not be created. + */ + if (status) { + /* Keep current configuration, fail only the unbound CIS */ + hci_unbound_cis_failed(hdev, rp->cig_id, status); + goto unlock; + } + + /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553 + * + * If the Status return parameter is zero, then the Controller shall + * set the Connection_Handle arrayed return parameter to the connection + * handle(s) corresponding to the CIS configurations specified in + * the CIS_IDs command parameter, in the same order. + */ + for (i = 0; i < rp->num_handles; ++i) { + conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id, + cp->cis[i].cis_id); + if (!conn || !bacmp(&conn->dst, BDADDR_ANY)) + continue; + + if (conn->state != BT_BOUND && conn->state != BT_CONNECT) + continue; + + if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i]))) + continue; + + if (conn->state == BT_CONNECT) + pending = true; + } + +unlock: + if (pending) + hci_le_create_cis_pending(hdev); + + hci_dev_unlock(hdev); + + return rp->status; +} + +static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_rp_le_setup_iso_path *rp = data; + struct hci_cp_le_setup_iso_path *cp; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); + if (!conn) + goto unlock; + + if (rp->status) { + hci_connect_cfm(conn, rp->status); + hci_conn_del(conn); + goto unlock; + } + + switch (cp->direction) { + /* Input (Host to Controller) */ + case 0x00: + /* Only confirm connection if output only */ + if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu) + hci_connect_cfm(conn, rp->status); + break; + /* Output (Controller to Host) */ + case 0x01: + /* Confirm connection since conn->iso_qos is always configured + * last. + */ + hci_connect_cfm(conn, rp->status); + break; + } + +unlock: + hci_dev_unlock(hdev); + return rp->status; +} + +static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status) +{ + bt_dev_dbg(hdev, "status 0x%2.2x", status); +} + +static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_le_set_per_adv_params *cp; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS); + if (!cp) + return rp->status; + + /* TODO: set the conn state */ + return rp->status; +} + +static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_status *rp = data; + struct hci_cp_le_set_per_adv_enable *cp; + struct adv_info *adv = NULL, *n; + u8 per_adv_cnt = 0; + + bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); + + if (rp->status) + return rp->status; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE); + if (!cp) + return rp->status; + + hci_dev_lock(hdev); + + adv = hci_find_adv_instance(hdev, cp->handle); + + if (cp->enable) { + hci_dev_set_flag(hdev, HCI_LE_PER_ADV); + + if (adv) + adv->enabled = true; + } else { + /* If just one instance was disabled check if there are + * any other instance enabled before clearing HCI_LE_PER_ADV. + * The current periodic adv instance will be marked as + * disabled once extended advertising is also disabled. + */ + list_for_each_entry_safe(adv, n, &hdev->adv_instances, + list) { + if (adv->periodic && adv->enabled) + per_adv_cnt++; + } + + if (per_adv_cnt > 1) + goto unlock; + + hci_dev_clear_flag(hdev, HCI_LE_PER_ADV); + } + +unlock: + hci_dev_unlock(hdev); + + return rp->status; +} + +#define HCI_CC_VL(_op, _func, _min, _max) \ +{ \ + .op = _op, \ + .func = _func, \ + .min_len = _min, \ + .max_len = _max, \ +} + +#define HCI_CC(_op, _func, _len) \ + HCI_CC_VL(_op, _func, _len, _len) + +#define HCI_CC_STATUS(_op, _func) \ + HCI_CC(_op, _func, sizeof(struct hci_ev_status)) + +static const struct hci_cc { + u16 op; + u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb); + u16 min_len; + u16 max_len; +} hci_cc_table[] = { + HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel), + HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq), + HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq), + HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL, + hci_cc_remote_name_req_cancel), + HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery, + sizeof(struct hci_rp_role_discovery)), + HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy, + sizeof(struct hci_rp_read_link_policy)), + HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy, + sizeof(struct hci_rp_write_link_policy)), + HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy, + sizeof(struct hci_rp_read_def_link_policy)), + HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY, + hci_cc_write_def_link_policy), + HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset), + HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key, + sizeof(struct hci_rp_read_stored_link_key)), + HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key, + sizeof(struct hci_rp_delete_stored_link_key)), + HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name), + HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name, + sizeof(struct hci_rp_read_local_name)), + HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable), + HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode), + HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable), + HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter), + HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev, + sizeof(struct hci_rp_read_class_of_dev)), + HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev), + HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting, + sizeof(struct hci_rp_read_voice_setting)), + HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting), + HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac, + sizeof(struct hci_rp_read_num_supported_iac)), + HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode), + HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support), + HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout, + sizeof(struct hci_rp_read_auth_payload_to)), + HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout, + sizeof(struct hci_rp_write_auth_payload_to)), + HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version, + sizeof(struct hci_rp_read_local_version)), + HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands, + sizeof(struct hci_rp_read_local_commands)), + HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features, + sizeof(struct hci_rp_read_local_features)), + HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features, + sizeof(struct hci_rp_read_local_ext_features)), + HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size, + sizeof(struct hci_rp_read_buffer_size)), + HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr, + sizeof(struct hci_rp_read_bd_addr)), + HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts, + sizeof(struct hci_rp_read_local_pairing_opts)), + HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity, + sizeof(struct hci_rp_read_page_scan_activity)), + HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY, + hci_cc_write_page_scan_activity), + HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type, + sizeof(struct hci_rp_read_page_scan_type)), + HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type), + HCI_CC(HCI_OP_READ_DATA_BLOCK_SIZE, hci_cc_read_data_block_size, + sizeof(struct hci_rp_read_data_block_size)), + HCI_CC(HCI_OP_READ_FLOW_CONTROL_MODE, hci_cc_read_flow_control_mode, + sizeof(struct hci_rp_read_flow_control_mode)), + HCI_CC(HCI_OP_READ_LOCAL_AMP_INFO, hci_cc_read_local_amp_info, + sizeof(struct hci_rp_read_local_amp_info)), + HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock, + sizeof(struct hci_rp_read_clock)), + HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size, + sizeof(struct hci_rp_read_enc_key_size)), + HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power, + sizeof(struct hci_rp_read_inq_rsp_tx_power)), + HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING, + hci_cc_read_def_err_data_reporting, + sizeof(struct hci_rp_read_def_err_data_reporting)), + HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING, + hci_cc_write_def_err_data_reporting), + HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply, + sizeof(struct hci_rp_pin_code_reply)), + HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply, + sizeof(struct hci_rp_pin_code_neg_reply)), + HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data, + sizeof(struct hci_rp_read_local_oob_data)), + HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data, + sizeof(struct hci_rp_read_local_oob_ext_data)), + HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size, + sizeof(struct hci_rp_le_read_buffer_size)), + HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features, + sizeof(struct hci_rp_le_read_local_features)), + HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power, + sizeof(struct hci_rp_le_read_adv_tx_power)), + HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply, + sizeof(struct hci_rp_user_confirm_reply)), + HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply, + sizeof(struct hci_rp_user_confirm_reply)), + HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply, + sizeof(struct hci_rp_user_confirm_reply)), + HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply, + sizeof(struct hci_rp_user_confirm_reply)), + HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr), + HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable), + HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param), + HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable), + HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE, + hci_cc_le_read_accept_list_size, + sizeof(struct hci_rp_le_read_accept_list_size)), + HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list), + HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST, + hci_cc_le_add_to_accept_list), + HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST, + hci_cc_le_del_from_accept_list), + HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states, + sizeof(struct hci_rp_le_read_supported_states)), + HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len, + sizeof(struct hci_rp_le_read_def_data_len)), + HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN, + hci_cc_le_write_def_data_len), + HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST, + hci_cc_le_add_to_resolv_list), + HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST, + hci_cc_le_del_from_resolv_list), + HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST, + hci_cc_le_clear_resolv_list), + HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size, + sizeof(struct hci_rp_le_read_resolv_list_size)), + HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, + hci_cc_le_set_addr_resolution_enable), + HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len, + sizeof(struct hci_rp_le_read_max_data_len)), + HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED, + hci_cc_write_le_host_supported), + HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param), + HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi, + sizeof(struct hci_rp_read_rssi)), + HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power, + sizeof(struct hci_rp_read_tx_power)), + HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode), + HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS, + hci_cc_le_set_ext_scan_param), + HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE, + hci_cc_le_set_ext_scan_enable), + HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy), + HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS, + hci_cc_le_read_num_adv_sets, + sizeof(struct hci_rp_le_read_num_supported_adv_sets)), + HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param, + sizeof(struct hci_rp_le_set_ext_adv_params)), + HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE, + hci_cc_le_set_ext_adv_enable), + HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR, + hci_cc_le_set_adv_set_random_addr), + HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set), + HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets), + HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param), + HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE, + hci_cc_le_set_per_adv_enable), + HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power, + sizeof(struct hci_rp_le_read_transmit_power)), + HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode), + HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2, + sizeof(struct hci_rp_le_read_buffer_size_v2)), + HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params, + sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE), + HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path, + sizeof(struct hci_rp_le_setup_iso_path)), +}; + +static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc, + struct sk_buff *skb) +{ + void *data; + + if (skb->len < cc->min_len) { + bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u", + cc->op, skb->len, cc->min_len); + return HCI_ERROR_UNSPECIFIED; + } + + /* Just warn if the length is over max_len size it still be possible to + * partially parse the cc so leave to callback to decide if that is + * acceptable. + */ + if (skb->len > cc->max_len) + bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u", + cc->op, skb->len, cc->max_len); + + data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len); + if (!data) + return HCI_ERROR_UNSPECIFIED; + + return cc->func(hdev, data, skb); +} + +static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb, u16 *opcode, u8 *status, + hci_req_complete_t *req_complete, + hci_req_complete_skb_t *req_complete_skb) +{ + struct hci_ev_cmd_complete *ev = data; + int i; + + *opcode = __le16_to_cpu(ev->opcode); + + bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode); + + for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) { + if (hci_cc_table[i].op == *opcode) { + *status = hci_cc_func(hdev, &hci_cc_table[i], skb); + break; + } + } + + if (i == ARRAY_SIZE(hci_cc_table)) { + /* Unknown opcode, assume byte 0 contains the status, so + * that e.g. __hci_cmd_sync() properly returns errors + * for vendor specific commands send by HCI drivers. + * If a vendor doesn't actually follow this convention we may + * need to introduce a vendor CC table in order to properly set + * the status. + */ + *status = skb->data[0]; + } + + handle_cmd_cnt_and_timer(hdev, ev->ncmd); + + hci_req_cmd_complete(hdev, *opcode, *status, req_complete, + req_complete_skb); + + if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) { + bt_dev_err(hdev, + "unexpected event for opcode 0x%4.4x", *opcode); + return; + } + + if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q)) + queue_work(hdev->workqueue, &hdev->cmd_work); +} + +static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status) +{ + struct hci_cp_le_create_cis *cp; + bool pending = false; + int i; + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + if (!status) + return; + + cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS); + if (!cp) + return; + + hci_dev_lock(hdev); + + /* Remove connection if command failed */ + for (i = 0; cp->num_cis; cp->num_cis--, i++) { + struct hci_conn *conn; + u16 handle; + + handle = __le16_to_cpu(cp->cis[i].cis_handle); + + conn = hci_conn_hash_lookup_handle(hdev, handle); + if (conn) { + if (test_and_clear_bit(HCI_CONN_CREATE_CIS, + &conn->flags)) + pending = true; + conn->state = BT_CLOSED; + hci_connect_cfm(conn, status); + hci_conn_del(conn); + } + } + + if (pending) + hci_le_create_cis_pending(hdev); + + hci_dev_unlock(hdev); +} + +#define HCI_CS(_op, _func) \ +{ \ + .op = _op, \ + .func = _func, \ +} + +static const struct hci_cs { + u16 op; + void (*func)(struct hci_dev *hdev, __u8 status); +} hci_cs_table[] = { + HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry), + HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn), + HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect), + HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco), + HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested), + HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt), + HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req), + HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features), + HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES, + hci_cs_read_remote_ext_features), + HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn), + HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN, + hci_cs_enhanced_setup_sync_conn), + HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode), + HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode), + HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role), + HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn), + HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features), + HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc), + HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn), + HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis), + HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big), +}; + +static void hci_cmd_status_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb, u16 *opcode, u8 *status, + hci_req_complete_t *req_complete, + hci_req_complete_skb_t *req_complete_skb) +{ + struct hci_ev_cmd_status *ev = data; + int i; + + *opcode = __le16_to_cpu(ev->opcode); + *status = ev->status; + + bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode); + + for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) { + if (hci_cs_table[i].op == *opcode) { + hci_cs_table[i].func(hdev, ev->status); + break; + } + } + + handle_cmd_cnt_and_timer(hdev, ev->ncmd); + + /* Indicate request completion if the command failed. Also, if + * we're not waiting for a special event and we get a success + * command status we should try to flag the request as completed + * (since for this kind of commands there will not be a command + * complete event). + */ + if (ev->status || (hdev->sent_cmd && !hci_skb_event(hdev->sent_cmd))) { + hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete, + req_complete_skb); + if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) { + bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x", + *opcode); + return; + } + } + + if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q)) + queue_work(hdev->workqueue, &hdev->cmd_work); +} + +static void hci_hardware_error_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_hardware_error *ev = data; + + bt_dev_dbg(hdev, "code 0x%2.2x", ev->code); + + hdev->hw_error_code = ev->code; + + queue_work(hdev->req_workqueue, &hdev->error_reset); +} + +static void hci_role_change_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_role_change *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (conn) { + if (!ev->status) + conn->role = ev->role; + + clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags); + + hci_role_switch_cfm(conn, ev->status, ev->role); + } + + hci_dev_unlock(hdev); +} + +static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_num_comp_pkts *ev = data; + int i; + + if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS, + flex_array_size(ev, handles, ev->num))) + return; + + if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_PACKET_BASED) { + bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode); + return; + } + + bt_dev_dbg(hdev, "num %d", ev->num); + + for (i = 0; i < ev->num; i++) { + struct hci_comp_pkts_info *info = &ev->handles[i]; + struct hci_conn *conn; + __u16 handle, count; + + handle = __le16_to_cpu(info->handle); + count = __le16_to_cpu(info->count); + + conn = hci_conn_hash_lookup_handle(hdev, handle); + if (!conn) + continue; + + conn->sent -= count; + + switch (conn->type) { + case ACL_LINK: + hdev->acl_cnt += count; + if (hdev->acl_cnt > hdev->acl_pkts) + hdev->acl_cnt = hdev->acl_pkts; + break; + + case LE_LINK: + if (hdev->le_pkts) { + hdev->le_cnt += count; + if (hdev->le_cnt > hdev->le_pkts) + hdev->le_cnt = hdev->le_pkts; + } else { + hdev->acl_cnt += count; + if (hdev->acl_cnt > hdev->acl_pkts) + hdev->acl_cnt = hdev->acl_pkts; + } + break; + + case SCO_LINK: + hdev->sco_cnt += count; + if (hdev->sco_cnt > hdev->sco_pkts) + hdev->sco_cnt = hdev->sco_pkts; + break; + + case ISO_LINK: + if (hdev->iso_pkts) { + hdev->iso_cnt += count; + if (hdev->iso_cnt > hdev->iso_pkts) + hdev->iso_cnt = hdev->iso_pkts; + } else if (hdev->le_pkts) { + hdev->le_cnt += count; + if (hdev->le_cnt > hdev->le_pkts) + hdev->le_cnt = hdev->le_pkts; + } else { + hdev->acl_cnt += count; + if (hdev->acl_cnt > hdev->acl_pkts) + hdev->acl_cnt = hdev->acl_pkts; + } + break; + + default: + bt_dev_err(hdev, "unknown type %d conn %p", + conn->type, conn); + break; + } + } + + queue_work(hdev->workqueue, &hdev->tx_work); +} + +static struct hci_conn *__hci_conn_lookup_handle(struct hci_dev *hdev, + __u16 handle) +{ + struct hci_chan *chan; + + switch (hdev->dev_type) { + case HCI_PRIMARY: + return hci_conn_hash_lookup_handle(hdev, handle); + case HCI_AMP: + chan = hci_chan_lookup_handle(hdev, handle); + if (chan) + return chan->conn; + break; + default: + bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type); + break; + } + + return NULL; +} + +static void hci_num_comp_blocks_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_num_comp_blocks *ev = data; + int i; + + if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_BLOCKS, + flex_array_size(ev, handles, ev->num_hndl))) + return; + + if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_BLOCK_BASED) { + bt_dev_err(hdev, "wrong event for mode %d", + hdev->flow_ctl_mode); + return; + } + + bt_dev_dbg(hdev, "num_blocks %d num_hndl %d", ev->num_blocks, + ev->num_hndl); + + for (i = 0; i < ev->num_hndl; i++) { + struct hci_comp_blocks_info *info = &ev->handles[i]; + struct hci_conn *conn = NULL; + __u16 handle, block_count; + + handle = __le16_to_cpu(info->handle); + block_count = __le16_to_cpu(info->blocks); + + conn = __hci_conn_lookup_handle(hdev, handle); + if (!conn) + continue; + + conn->sent -= block_count; + + switch (conn->type) { + case ACL_LINK: + case AMP_LINK: + hdev->block_cnt += block_count; + if (hdev->block_cnt > hdev->num_blocks) + hdev->block_cnt = hdev->num_blocks; + break; + + default: + bt_dev_err(hdev, "unknown type %d conn %p", + conn->type, conn); + break; + } + } + + queue_work(hdev->workqueue, &hdev->tx_work); +} + +static void hci_mode_change_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_mode_change *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (conn) { + conn->mode = ev->mode; + + if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND, + &conn->flags)) { + if (conn->mode == HCI_CM_ACTIVE) + set_bit(HCI_CONN_POWER_SAVE, &conn->flags); + else + clear_bit(HCI_CONN_POWER_SAVE, &conn->flags); + } + + if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) + hci_sco_setup(conn, ev->status); + } + + hci_dev_unlock(hdev); +} + +static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_pin_code_req *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn) + goto unlock; + + if (conn->state == BT_CONNECTED) { + hci_conn_hold(conn); + conn->disc_timeout = HCI_PAIRING_TIMEOUT; + hci_conn_drop(conn); + } + + if (!hci_dev_test_flag(hdev, HCI_BONDABLE) && + !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) { + hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY, + sizeof(ev->bdaddr), &ev->bdaddr); + } else if (hci_dev_test_flag(hdev, HCI_MGMT)) { + u8 secure; + + if (conn->pending_sec_level == BT_SECURITY_HIGH) + secure = 1; + else + secure = 0; + + mgmt_pin_code_request(hdev, &ev->bdaddr, secure); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len) +{ + if (key_type == HCI_LK_CHANGED_COMBINATION) + return; + + conn->pin_length = pin_len; + conn->key_type = key_type; + + switch (key_type) { + case HCI_LK_LOCAL_UNIT: + case HCI_LK_REMOTE_UNIT: + case HCI_LK_DEBUG_COMBINATION: + return; + case HCI_LK_COMBINATION: + if (pin_len == 16) + conn->pending_sec_level = BT_SECURITY_HIGH; + else + conn->pending_sec_level = BT_SECURITY_MEDIUM; + break; + case HCI_LK_UNAUTH_COMBINATION_P192: + case HCI_LK_UNAUTH_COMBINATION_P256: + conn->pending_sec_level = BT_SECURITY_MEDIUM; + break; + case HCI_LK_AUTH_COMBINATION_P192: + conn->pending_sec_level = BT_SECURITY_HIGH; + break; + case HCI_LK_AUTH_COMBINATION_P256: + conn->pending_sec_level = BT_SECURITY_FIPS; + break; + } +} + +static void hci_link_key_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_link_key_req *ev = data; + struct hci_cp_link_key_reply cp; + struct hci_conn *conn; + struct link_key *key; + + bt_dev_dbg(hdev, ""); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + return; + + hci_dev_lock(hdev); + + key = hci_find_link_key(hdev, &ev->bdaddr); + if (!key) { + bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr); + goto not_found; + } + + bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (conn) { + clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags); + + if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 || + key->type == HCI_LK_UNAUTH_COMBINATION_P256) && + conn->auth_type != 0xff && (conn->auth_type & 0x01)) { + bt_dev_dbg(hdev, "ignoring unauthenticated key"); + goto not_found; + } + + if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 && + (conn->pending_sec_level == BT_SECURITY_HIGH || + conn->pending_sec_level == BT_SECURITY_FIPS)) { + bt_dev_dbg(hdev, "ignoring key unauthenticated for high security"); + goto not_found; + } + + conn_set_key(conn, key->type, key->pin_len); + } + + bacpy(&cp.bdaddr, &ev->bdaddr); + memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE); + + hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp); + + hci_dev_unlock(hdev); + + return; + +not_found: + hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr); + hci_dev_unlock(hdev); +} + +static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_link_key_notify *ev = data; + struct hci_conn *conn; + struct link_key *key; + bool persistent; + u8 pin_len = 0; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn) + goto unlock; + + /* Ignore NULL link key against CVE-2020-26555 */ + if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) { + bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR", + &ev->bdaddr); + hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); + hci_conn_drop(conn); + goto unlock; + } + + hci_conn_hold(conn); + conn->disc_timeout = HCI_DISCONN_TIMEOUT; + hci_conn_drop(conn); + + set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags); + conn_set_key(conn, ev->key_type, conn->pin_length); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + goto unlock; + + key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key, + ev->key_type, pin_len, &persistent); + if (!key) + goto unlock; + + /* Update connection information since adding the key will have + * fixed up the type in the case of changed combination keys. + */ + if (ev->key_type == HCI_LK_CHANGED_COMBINATION) + conn_set_key(conn, key->type, key->pin_len); + + mgmt_new_link_key(hdev, key, persistent); + + /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag + * is set. If it's not set simply remove the key from the kernel + * list (we've still notified user space about it but with + * store_hint being 0). + */ + if (key->type == HCI_LK_DEBUG_COMBINATION && + !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) { + list_del_rcu(&key->list); + kfree_rcu(key, rcu); + goto unlock; + } + + if (persistent) + clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags); + else + set_bit(HCI_CONN_FLUSH_KEY, &conn->flags); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_clock_offset_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_clock_offset *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", 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; + + ie = hci_inquiry_cache_lookup(hdev, &conn->dst); + if (ie) { + ie->data.clock_offset = ev->clock_offset; + ie->timestamp = jiffies; + } + } + + hci_dev_unlock(hdev); +} + +static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_pkt_type_change *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (conn && !ev->status) + conn->pkt_type = __le16_to_cpu(ev->pkt_type); + + hci_dev_unlock(hdev); +} + +static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_pscan_rep_mode *ev = data; + struct inquiry_entry *ie; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); + if (ie) { + ie->data.pscan_rep_mode = ev->pscan_rep_mode; + ie->timestamp = jiffies; + } + + hci_dev_unlock(hdev); +} + +static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata, + struct sk_buff *skb) +{ + struct hci_ev_inquiry_result_rssi *ev = edata; + struct inquiry_data data; + int i; + + bt_dev_dbg(hdev, "num_rsp %d", ev->num); + + if (!ev->num) + return; + + if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) + return; + + hci_dev_lock(hdev); + + if (skb->len == array_size(ev->num, + sizeof(struct inquiry_info_rssi_pscan))) { + struct inquiry_info_rssi_pscan *info; + + for (i = 0; i < ev->num; i++) { + u32 flags; + + info = hci_ev_skb_pull(hdev, skb, + HCI_EV_INQUIRY_RESULT_WITH_RSSI, + sizeof(*info)); + if (!info) { + bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", + HCI_EV_INQUIRY_RESULT_WITH_RSSI); + goto unlock; + } + + bacpy(&data.bdaddr, &info->bdaddr); + data.pscan_rep_mode = info->pscan_rep_mode; + data.pscan_period_mode = info->pscan_period_mode; + data.pscan_mode = info->pscan_mode; + memcpy(data.dev_class, info->dev_class, 3); + data.clock_offset = info->clock_offset; + data.rssi = info->rssi; + data.ssp_mode = 0x00; + + flags = hci_inquiry_cache_update(hdev, &data, false); + + mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, + info->dev_class, info->rssi, + flags, NULL, 0, NULL, 0, 0); + } + } else if (skb->len == array_size(ev->num, + sizeof(struct inquiry_info_rssi))) { + struct inquiry_info_rssi *info; + + for (i = 0; i < ev->num; i++) { + u32 flags; + + info = hci_ev_skb_pull(hdev, skb, + HCI_EV_INQUIRY_RESULT_WITH_RSSI, + sizeof(*info)); + if (!info) { + bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", + HCI_EV_INQUIRY_RESULT_WITH_RSSI); + goto unlock; + } + + bacpy(&data.bdaddr, &info->bdaddr); + data.pscan_rep_mode = info->pscan_rep_mode; + data.pscan_period_mode = info->pscan_period_mode; + data.pscan_mode = 0x00; + memcpy(data.dev_class, info->dev_class, 3); + data.clock_offset = info->clock_offset; + data.rssi = info->rssi; + data.ssp_mode = 0x00; + + flags = hci_inquiry_cache_update(hdev, &data, false); + + mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, + info->dev_class, info->rssi, + flags, NULL, 0, NULL, 0, 0); + } + } else { + bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", + HCI_EV_INQUIRY_RESULT_WITH_RSSI); + } +unlock: + hci_dev_unlock(hdev); +} + +static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_remote_ext_features *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + if (ev->page < HCI_MAX_PAGES) + memcpy(conn->features[ev->page], ev->features, 8); + + if (!ev->status && ev->page == 0x01) { + struct inquiry_entry *ie; + + ie = hci_inquiry_cache_lookup(hdev, &conn->dst); + if (ie) + ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP); + + if (ev->features[0] & LMP_HOST_SSP) { + set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); + } else { + /* It is mandatory by the Bluetooth specification that + * Extended Inquiry Results are only used when Secure + * Simple Pairing is enabled, but some devices violate + * this. + * + * To make these devices work, the internal SSP + * enabled flag needs to be cleared if the remote host + * features do not indicate SSP support */ + clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags); + } + + if (ev->features[0] & LMP_HOST_SC) + set_bit(HCI_CONN_SC_ENABLED, &conn->flags); + } + + if (conn->state != BT_CONFIG) + goto unlock; + + if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) { + struct hci_cp_remote_name_req cp; + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, &conn->dst); + cp.pscan_rep_mode = 0x02; + hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); + } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) + mgmt_device_connected(hdev, conn, NULL, 0); + + if (!hci_outgoing_auth_needed(hdev, conn)) { + conn->state = BT_CONNECTED; + hci_connect_cfm(conn, ev->status); + hci_conn_drop(conn); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_sync_conn_complete *ev = data; + struct hci_conn *conn; + u8 status = ev->status; + + switch (ev->link_type) { + case SCO_LINK: + case ESCO_LINK: + break; + default: + /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type + * for HCI_Synchronous_Connection_Complete is limited to + * either SCO or eSCO + */ + bt_dev_err(hdev, "Ignoring connect complete event for invalid link type"); + return; + } + + bt_dev_dbg(hdev, "status 0x%2.2x", status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr); + if (!conn) { + if (ev->link_type == ESCO_LINK) + goto unlock; + + /* When the link type in the event indicates SCO connection + * and lookup of the connection object fails, then check + * if an eSCO connection object exists. + * + * The core limits the synchronous connections to either + * SCO or eSCO. The eSCO connection is preferred and tried + * to be setup first and until successfully established, + * the link type will be hinted as eSCO. + */ + conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr); + if (!conn) + goto unlock; + } + + /* The HCI_Synchronous_Connection_Complete event is only sent once per connection. + * Processing it more than once per connection can corrupt kernel memory. + * + * As the connection handle is set here for the first time, it indicates + * whether the connection is already set up. + */ + if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { + bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection"); + goto unlock; + } + + switch (status) { + case 0x00: + status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle)); + if (status) { + conn->state = BT_CLOSED; + break; + } + + conn->state = BT_CONNECTED; + conn->type = ev->link_type; + + hci_debugfs_create_conn(conn); + hci_conn_add_sysfs(conn); + break; + + case 0x10: /* Connection Accept Timeout */ + case 0x0d: /* Connection Rejected due to Limited Resources */ + case 0x11: /* Unsupported Feature or Parameter Value */ + case 0x1c: /* SCO interval rejected */ + case 0x1a: /* Unsupported Remote Feature */ + case 0x1e: /* Invalid LMP Parameters */ + case 0x1f: /* Unspecified error */ + case 0x20: /* Unsupported LMP Parameter value */ + if (conn->out) { + conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | + (hdev->esco_type & EDR_ESCO_MASK); + if (hci_setup_sync(conn, conn->parent->handle)) + goto unlock; + } + fallthrough; + + default: + conn->state = BT_CLOSED; + break; + } + + bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode); + /* Notify only in case of SCO over HCI transport data path which + * is zero and non-zero value shall be non-HCI transport data path + */ + if (conn->codec.data_path == 0 && hdev->notify) { + switch (ev->air_mode) { + case 0x02: + hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD); + break; + case 0x03: + hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP); + break; + } + } + + hci_connect_cfm(conn, status); + if (status) + hci_conn_del(conn); + +unlock: + hci_dev_unlock(hdev); +} + +static inline size_t eir_get_length(u8 *eir, size_t eir_len) +{ + size_t parsed = 0; + + while (parsed < eir_len) { + u8 field_len = eir[0]; + + if (field_len == 0) + return parsed; + + parsed += field_len + 1; + eir += field_len + 1; + } + + return eir_len; +} + +static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata, + struct sk_buff *skb) +{ + struct hci_ev_ext_inquiry_result *ev = edata; + struct inquiry_data data; + size_t eir_len; + int i; + + if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT, + flex_array_size(ev, info, ev->num))) + return; + + bt_dev_dbg(hdev, "num %d", ev->num); + + if (!ev->num) + return; + + if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) + return; + + hci_dev_lock(hdev); + + for (i = 0; i < ev->num; i++) { + struct extended_inquiry_info *info = &ev->info[i]; + u32 flags; + bool name_known; + + bacpy(&data.bdaddr, &info->bdaddr); + data.pscan_rep_mode = info->pscan_rep_mode; + data.pscan_period_mode = info->pscan_period_mode; + data.pscan_mode = 0x00; + memcpy(data.dev_class, info->dev_class, 3); + data.clock_offset = info->clock_offset; + data.rssi = info->rssi; + data.ssp_mode = 0x01; + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + name_known = eir_get_data(info->data, + sizeof(info->data), + EIR_NAME_COMPLETE, NULL); + else + name_known = true; + + flags = hci_inquiry_cache_update(hdev, &data, name_known); + + eir_len = eir_get_length(info->data, sizeof(info->data)); + + mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, + info->dev_class, info->rssi, + flags, info->data, eir_len, NULL, 0, 0); + } + + hci_dev_unlock(hdev); +} + +static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_key_refresh_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status, + __le16_to_cpu(ev->handle)); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + /* For BR/EDR the necessary steps are taken through the + * auth_complete event. + */ + if (conn->type != LE_LINK) + goto unlock; + + if (!ev->status) + conn->sec_level = conn->pending_sec_level; + + clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); + + if (ev->status && conn->state == BT_CONNECTED) { + hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); + hci_conn_drop(conn); + goto unlock; + } + + if (conn->state == BT_CONFIG) { + if (!ev->status) + conn->state = BT_CONNECTED; + + hci_connect_cfm(conn, ev->status); + hci_conn_drop(conn); + } else { + hci_auth_cfm(conn, ev->status); + + hci_conn_hold(conn); + conn->disc_timeout = HCI_DISCONN_TIMEOUT; + hci_conn_drop(conn); + } + +unlock: + hci_dev_unlock(hdev); +} + +static u8 hci_get_auth_req(struct hci_conn *conn) +{ + /* If remote requests no-bonding follow that lead */ + if (conn->remote_auth == HCI_AT_NO_BONDING || + conn->remote_auth == HCI_AT_NO_BONDING_MITM) + return conn->remote_auth | (conn->auth_type & 0x01); + + /* If both remote and local have enough IO capabilities, require + * MITM protection + */ + if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT && + conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) + return conn->remote_auth | 0x01; + + /* No MITM protection possible so ignore remote requirement */ + return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01); +} + +static u8 bredr_oob_data_present(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + struct oob_data *data; + + data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR); + if (!data) + return 0x00; + + if (bredr_sc_enabled(hdev)) { + /* When Secure Connections is enabled, then just + * return the present value stored with the OOB + * data. The stored value contains the right present + * information. However it can only be trusted when + * not in Secure Connection Only mode. + */ + if (!hci_dev_test_flag(hdev, HCI_SC_ONLY)) + return data->present; + + /* When Secure Connections Only mode is enabled, then + * the P-256 values are required. If they are not + * available, then do not declare that OOB data is + * present. + */ + if (!crypto_memneq(data->rand256, ZERO_KEY, 16) || + !crypto_memneq(data->hash256, ZERO_KEY, 16)) + return 0x00; + + return 0x02; + } + + /* When Secure Connections is not enabled or actually + * not supported by the hardware, then check that if + * P-192 data values are present. + */ + if (!crypto_memneq(data->rand192, ZERO_KEY, 16) || + !crypto_memneq(data->hash192, ZERO_KEY, 16)) + return 0x00; + + return 0x01; +} + +static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_io_capa_request *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn || !hci_conn_ssp_enabled(conn)) + goto unlock; + + hci_conn_hold(conn); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + goto unlock; + + /* Allow pairing if we're pairable, the initiators of the + * pairing or if the remote is not requesting bonding. + */ + if (hci_dev_test_flag(hdev, HCI_BONDABLE) || + test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) || + (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) { + struct hci_cp_io_capability_reply cp; + + bacpy(&cp.bdaddr, &ev->bdaddr); + /* Change the IO capability from KeyboardDisplay + * to DisplayYesNo as it is not supported by BT spec. */ + cp.capability = (conn->io_capability == 0x04) ? + HCI_IO_DISPLAY_YESNO : conn->io_capability; + + /* If we are initiators, there is no remote information yet */ + if (conn->remote_auth == 0xff) { + /* Request MITM protection if our IO caps allow it + * except for the no-bonding case. + */ + if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT && + conn->auth_type != HCI_AT_NO_BONDING) + conn->auth_type |= 0x01; + } else { + conn->auth_type = hci_get_auth_req(conn); + } + + /* If we're not bondable, force one of the non-bondable + * authentication requirement values. + */ + if (!hci_dev_test_flag(hdev, HCI_BONDABLE)) + conn->auth_type &= HCI_AT_NO_BONDING_MITM; + + cp.authentication = conn->auth_type; + cp.oob_data = bredr_oob_data_present(conn); + + hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY, + sizeof(cp), &cp); + } else { + struct hci_cp_io_capability_neg_reply cp; + + bacpy(&cp.bdaddr, &ev->bdaddr); + cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED; + + hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY, + sizeof(cp), &cp); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_io_capa_reply *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn) + goto unlock; + + conn->remote_cap = ev->capability; + conn->remote_auth = ev->authentication; + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_user_confirm_req *ev = data; + int loc_mitm, rem_mitm, confirm_hint = 0; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + goto unlock; + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn) + goto unlock; + + loc_mitm = (conn->auth_type & 0x01); + rem_mitm = (conn->remote_auth & 0x01); + + /* If we require MITM but the remote device can't provide that + * (it has NoInputNoOutput) then reject the confirmation + * request. We check the security level here since it doesn't + * necessarily match conn->auth_type. + */ + if (conn->pending_sec_level > BT_SECURITY_MEDIUM && + conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) { + bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM"); + hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY, + sizeof(ev->bdaddr), &ev->bdaddr); + goto unlock; + } + + /* If no side requires MITM protection; auto-accept */ + if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) && + (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) { + + /* If we're not the initiators request authorization to + * proceed from user space (mgmt_user_confirm with + * confirm_hint set to 1). The exception is if neither + * side had MITM or if the local IO capability is + * NoInputNoOutput, in which case we do auto-accept + */ + if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && + conn->io_capability != HCI_IO_NO_INPUT_OUTPUT && + (loc_mitm || rem_mitm)) { + bt_dev_dbg(hdev, "Confirming auto-accept as acceptor"); + confirm_hint = 1; + goto confirm; + } + + /* If there already exists link key in local host, leave the + * decision to user space since the remote device could be + * legitimate or malicious. + */ + if (hci_find_link_key(hdev, &ev->bdaddr)) { + bt_dev_dbg(hdev, "Local host already has link key"); + confirm_hint = 1; + goto confirm; + } + + BT_DBG("Auto-accept of user confirmation with %ums delay", + hdev->auto_accept_delay); + + if (hdev->auto_accept_delay > 0) { + int delay = msecs_to_jiffies(hdev->auto_accept_delay); + queue_delayed_work(conn->hdev->workqueue, + &conn->auto_accept_work, delay); + goto unlock; + } + + hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, + sizeof(ev->bdaddr), &ev->bdaddr); + goto unlock; + } + +confirm: + mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0, + le32_to_cpu(ev->passkey), confirm_hint); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_user_passkey_req *ev = data; + + bt_dev_dbg(hdev, ""); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0); +} + +static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_user_passkey_notify *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn) + return; + + conn->passkey_notify = __le32_to_cpu(ev->passkey); + conn->passkey_entered = 0; + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, + conn->dst_type, conn->passkey_notify, + conn->passkey_entered); +} + +static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_keypress_notify *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn) + return; + + switch (ev->type) { + case HCI_KEYPRESS_STARTED: + conn->passkey_entered = 0; + return; + + case HCI_KEYPRESS_ENTERED: + conn->passkey_entered++; + break; + + case HCI_KEYPRESS_ERASED: + conn->passkey_entered--; + break; + + case HCI_KEYPRESS_CLEARED: + conn->passkey_entered = 0; + break; + + case HCI_KEYPRESS_COMPLETED: + return; + } + + if (hci_dev_test_flag(hdev, HCI_MGMT)) + mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, + conn->dst_type, conn->passkey_notify, + conn->passkey_entered); +} + +static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_simple_pair_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (!conn || !hci_conn_ssp_enabled(conn)) + goto unlock; + + /* Reset the authentication requirement to unknown */ + conn->remote_auth = 0xff; + + /* To avoid duplicate auth_failed events to user space we check + * the HCI_CONN_AUTH_PEND flag which will be set if we + * initiated the authentication. A traditional auth_complete + * event gets always produced as initiator and is also mapped to + * the mgmt_auth_failed event */ + if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status) + mgmt_auth_failed(conn, ev->status); + + hci_conn_drop(conn); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_remote_host_features *ev = data; + struct inquiry_entry *ie; + struct hci_conn *conn; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (conn) + memcpy(conn->features[1], ev->features, 8); + + ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); + if (ie) + ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP); + + hci_dev_unlock(hdev); +} + +static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata, + struct sk_buff *skb) +{ + struct hci_ev_remote_oob_data_request *ev = edata; + struct oob_data *data; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + goto unlock; + + data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR); + if (!data) { + struct hci_cp_remote_oob_data_neg_reply cp; + + bacpy(&cp.bdaddr, &ev->bdaddr); + hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY, + sizeof(cp), &cp); + goto unlock; + } + + if (bredr_sc_enabled(hdev)) { + struct hci_cp_remote_oob_ext_data_reply cp; + + bacpy(&cp.bdaddr, &ev->bdaddr); + if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) { + memset(cp.hash192, 0, sizeof(cp.hash192)); + memset(cp.rand192, 0, sizeof(cp.rand192)); + } else { + memcpy(cp.hash192, data->hash192, sizeof(cp.hash192)); + memcpy(cp.rand192, data->rand192, sizeof(cp.rand192)); + } + memcpy(cp.hash256, data->hash256, sizeof(cp.hash256)); + memcpy(cp.rand256, data->rand256, sizeof(cp.rand256)); + + hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY, + sizeof(cp), &cp); + } else { + struct hci_cp_remote_oob_data_reply cp; + + bacpy(&cp.bdaddr, &ev->bdaddr); + memcpy(cp.hash, data->hash192, sizeof(cp.hash)); + memcpy(cp.rand, data->rand192, sizeof(cp.rand)); + + hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY, + sizeof(cp), &cp); + } + +unlock: + hci_dev_unlock(hdev); +} + +#if IS_ENABLED(CONFIG_BT_HS) +static void hci_chan_selected_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_channel_selected *ev = data; + struct hci_conn *hcon; + + bt_dev_dbg(hdev, "handle 0x%2.2x", ev->phy_handle); + + hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle); + if (!hcon) + return; + + amp_read_loc_assoc_final_data(hdev, hcon); +} + +static void hci_phy_link_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_phy_link_complete *ev = data; + struct hci_conn *hcon, *bredr_hcon; + + bt_dev_dbg(hdev, "handle 0x%2.2x status 0x%2.2x", ev->phy_handle, + ev->status); + + hci_dev_lock(hdev); + + hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle); + if (!hcon) + goto unlock; + + if (!hcon->amp_mgr) + goto unlock; + + if (ev->status) { + hci_conn_del(hcon); + goto unlock; + } + + bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon; + + hcon->state = BT_CONNECTED; + bacpy(&hcon->dst, &bredr_hcon->dst); + + hci_conn_hold(hcon); + hcon->disc_timeout = HCI_DISCONN_TIMEOUT; + hci_conn_drop(hcon); + + hci_debugfs_create_conn(hcon); + hci_conn_add_sysfs(hcon); + + amp_physical_cfm(bredr_hcon, hcon); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_loglink_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_logical_link_complete *ev = data; + struct hci_conn *hcon; + struct hci_chan *hchan; + struct amp_mgr *mgr; + + bt_dev_dbg(hdev, "log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x", + le16_to_cpu(ev->handle), ev->phy_handle, ev->status); + + hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle); + if (!hcon) + return; + + /* Create AMP hchan */ + hchan = hci_chan_create(hcon); + if (!hchan) + return; + + hchan->handle = le16_to_cpu(ev->handle); + hchan->amp = true; + + BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan); + + mgr = hcon->amp_mgr; + if (mgr && mgr->bredr_chan) { + struct l2cap_chan *bredr_chan = mgr->bredr_chan; + + l2cap_chan_lock(bredr_chan); + + bredr_chan->conn->mtu = hdev->block_mtu; + l2cap_logical_cfm(bredr_chan, hchan, 0); + hci_conn_hold(hcon); + + l2cap_chan_unlock(bredr_chan); + } +} + +static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_disconn_logical_link_complete *ev = data; + struct hci_chan *hchan; + + bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", + le16_to_cpu(ev->handle), ev->status); + + if (ev->status) + return; + + hci_dev_lock(hdev); + + hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle)); + if (!hchan || !hchan->amp) + goto unlock; + + amp_destroy_logical_link(hchan, ev->reason); + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_disconn_phy_link_complete *ev = data; + struct hci_conn *hcon; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + if (ev->status) + return; + + hci_dev_lock(hdev); + + hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle); + if (hcon && hcon->type == AMP_LINK) { + hcon->state = BT_CLOSED; + hci_disconn_cfm(hcon, ev->reason); + hci_conn_del(hcon); + } + + hci_dev_unlock(hdev); +} +#endif + +static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr, + u8 bdaddr_type, bdaddr_t *local_rpa) +{ + if (conn->out) { + conn->dst_type = bdaddr_type; + conn->resp_addr_type = bdaddr_type; + bacpy(&conn->resp_addr, bdaddr); + + /* Check if the controller has set a Local RPA then it must be + * used instead or hdev->rpa. + */ + if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) { + conn->init_addr_type = ADDR_LE_DEV_RANDOM; + bacpy(&conn->init_addr, local_rpa); + } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) { + conn->init_addr_type = ADDR_LE_DEV_RANDOM; + bacpy(&conn->init_addr, &conn->hdev->rpa); + } else { + hci_copy_identity_address(conn->hdev, &conn->init_addr, + &conn->init_addr_type); + } + } else { + conn->resp_addr_type = conn->hdev->adv_addr_type; + /* Check if the controller has set a Local RPA then it must be + * used instead or hdev->rpa. + */ + if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) { + conn->resp_addr_type = ADDR_LE_DEV_RANDOM; + bacpy(&conn->resp_addr, local_rpa); + } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) { + /* In case of ext adv, resp_addr will be updated in + * Adv Terminated event. + */ + if (!ext_adv_capable(conn->hdev)) + bacpy(&conn->resp_addr, + &conn->hdev->random_addr); + } else { + bacpy(&conn->resp_addr, &conn->hdev->bdaddr); + } + + conn->init_addr_type = bdaddr_type; + bacpy(&conn->init_addr, bdaddr); + + /* For incoming connections, set the default minimum + * and maximum connection interval. They will be used + * to check if the parameters are in range and if not + * trigger the connection update procedure. + */ + conn->le_conn_min_interval = conn->hdev->le_conn_min_interval; + conn->le_conn_max_interval = conn->hdev->le_conn_max_interval; + } +} + +static void le_conn_complete_evt(struct hci_dev *hdev, u8 status, + bdaddr_t *bdaddr, u8 bdaddr_type, + bdaddr_t *local_rpa, u8 role, u16 handle, + u16 interval, u16 latency, + u16 supervision_timeout) +{ + struct hci_conn_params *params; + struct hci_conn *conn; + struct smp_irk *irk; + u8 addr_type; + + hci_dev_lock(hdev); + + /* All controllers implicitly stop advertising in the event of a + * connection, so ensure that the state bit is cleared. + */ + hci_dev_clear_flag(hdev, HCI_LE_ADV); + + conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr); + if (!conn) { + /* In case of error status and there is no connection pending + * just unlock as there is nothing to cleanup. + */ + if (status) + goto unlock; + + conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role); + if (!conn) { + bt_dev_err(hdev, "no memory for new connection"); + goto unlock; + } + + conn->dst_type = bdaddr_type; + + /* If we didn't have a hci_conn object previously + * but we're in central role this must be something + * initiated using an accept list. Since accept list based + * connections are not "first class citizens" we don't + * have full tracking of them. Therefore, we go ahead + * with a "best effort" approach of determining the + * initiator address based on the HCI_PRIVACY flag. + */ + if (conn->out) { + conn->resp_addr_type = bdaddr_type; + bacpy(&conn->resp_addr, bdaddr); + if (hci_dev_test_flag(hdev, HCI_PRIVACY)) { + conn->init_addr_type = ADDR_LE_DEV_RANDOM; + bacpy(&conn->init_addr, &hdev->rpa); + } else { + hci_copy_identity_address(hdev, + &conn->init_addr, + &conn->init_addr_type); + } + } + } else { + cancel_delayed_work(&conn->le_conn_timeout); + } + + /* The HCI_LE_Connection_Complete event is only sent once per connection. + * Processing it more than once per connection can corrupt kernel memory. + * + * As the connection handle is set here for the first time, it indicates + * whether the connection is already set up. + */ + if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { + bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection"); + goto unlock; + } + + le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa); + + /* Lookup the identity address from the stored connection + * address and address type. + * + * When establishing connections to an identity address, the + * connection procedure will store the resolvable random + * address first. Now if it can be converted back into the + * identity address, start using the identity address from + * now on. + */ + irk = hci_get_irk(hdev, &conn->dst, conn->dst_type); + if (irk) { + bacpy(&conn->dst, &irk->bdaddr); + conn->dst_type = irk->addr_type; + } + + conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL); + + /* All connection failure handling is taken care of by the + * hci_conn_failed function which is triggered by the HCI + * request completion callbacks used for connecting. + */ + if (status || hci_conn_set_handle(conn, handle)) + goto unlock; + + /* Drop the connection if it has been aborted */ + if (test_bit(HCI_CONN_CANCEL, &conn->flags)) { + hci_conn_drop(conn); + goto unlock; + } + + if (conn->dst_type == ADDR_LE_DEV_PUBLIC) + addr_type = BDADDR_LE_PUBLIC; + else + addr_type = BDADDR_LE_RANDOM; + + /* Drop the connection if the device is blocked */ + if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) { + hci_conn_drop(conn); + goto unlock; + } + + if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) + mgmt_device_connected(hdev, conn, NULL, 0); + + conn->sec_level = BT_SECURITY_LOW; + conn->state = BT_CONFIG; + + /* Store current advertising instance as connection advertising instance + * when sotfware rotation is in use so it can be re-enabled when + * disconnected. + */ + if (!ext_adv_capable(hdev)) + conn->adv_instance = hdev->cur_adv_instance; + + conn->le_conn_interval = interval; + conn->le_conn_latency = latency; + conn->le_supv_timeout = supervision_timeout; + + hci_debugfs_create_conn(conn); + hci_conn_add_sysfs(conn); + + /* The remote features procedure is defined for central + * role only. So only in case of an initiated connection + * request the remote features. + * + * If the local controller supports peripheral-initiated features + * exchange, then requesting the remote features in peripheral + * role is possible. Otherwise just transition into the + * connected state without requesting the remote features. + */ + if (conn->out || + (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) { + struct hci_cp_le_read_remote_features cp; + + cp.handle = __cpu_to_le16(conn->handle); + + hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES, + sizeof(cp), &cp); + + hci_conn_hold(conn); + } else { + conn->state = BT_CONNECTED; + hci_connect_cfm(conn, status); + } + + params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, + conn->dst_type); + if (params) { + hci_pend_le_list_del_init(params); + if (params->conn) { + hci_conn_drop(params->conn); + hci_conn_put(params->conn); + params->conn = NULL; + } + } + +unlock: + hci_update_passive_scan(hdev); + hci_dev_unlock(hdev); +} + +static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_conn_complete *ev = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type, + NULL, ev->role, le16_to_cpu(ev->handle), + le16_to_cpu(ev->interval), + le16_to_cpu(ev->latency), + le16_to_cpu(ev->supervision_timeout)); +} + +static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_enh_conn_complete *ev = data; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type, + &ev->local_rpa, ev->role, le16_to_cpu(ev->handle), + le16_to_cpu(ev->interval), + le16_to_cpu(ev->latency), + le16_to_cpu(ev->supervision_timeout)); +} + +static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_evt_le_ext_adv_set_term *ev = data; + struct hci_conn *conn; + struct adv_info *adv, *n; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + /* The Bluetooth Core 5.3 specification clearly states that this event + * shall not be sent when the Host disables the advertising set. So in + * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event. + * + * When the Host disables an advertising set, all cleanup is done via + * its command callback and not needed to be duplicated here. + */ + if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) { + bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event"); + return; + } + + hci_dev_lock(hdev); + + adv = hci_find_adv_instance(hdev, ev->handle); + + if (ev->status) { + if (!adv) + goto unlock; + + /* Remove advertising as it has been terminated */ + hci_remove_adv_instance(hdev, ev->handle); + mgmt_advertising_removed(NULL, hdev, ev->handle); + + list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { + if (adv->enabled) + goto unlock; + } + + /* We are no longer advertising, clear HCI_LE_ADV */ + hci_dev_clear_flag(hdev, HCI_LE_ADV); + goto unlock; + } + + if (adv) + adv->enabled = false; + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle)); + if (conn) { + /* Store handle in the connection so the correct advertising + * instance can be re-enabled when disconnected. + */ + conn->adv_instance = ev->handle; + + if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM || + bacmp(&conn->resp_addr, BDADDR_ANY)) + goto unlock; + + if (!ev->handle) { + bacpy(&conn->resp_addr, &hdev->random_addr); + goto unlock; + } + + if (adv) + bacpy(&conn->resp_addr, &adv->random_addr); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_conn_update_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + if (ev->status) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (conn) { + conn->le_conn_interval = le16_to_cpu(ev->interval); + conn->le_conn_latency = le16_to_cpu(ev->latency); + conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout); + } + + hci_dev_unlock(hdev); +} + +/* This function requires the caller holds hdev->lock */ +static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev, + bdaddr_t *addr, + u8 addr_type, bool addr_resolved, + u8 adv_type) +{ + struct hci_conn *conn; + struct hci_conn_params *params; + + /* If the event is not connectable don't proceed further */ + if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND) + return NULL; + + /* Ignore if the device is blocked or hdev is suspended */ + if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) || + hdev->suspended) + return NULL; + + /* Most controller will fail if we try to create new connections + * while we have an existing one in peripheral role. + */ + if (hdev->conn_hash.le_num_peripheral > 0 && + (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) || + !(hdev->le_states[3] & 0x10))) + return NULL; + + /* If we're not connectable only connect devices that we have in + * our pend_le_conns list. + */ + params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr, + addr_type); + if (!params) + return NULL; + + if (!params->explicit_connect) { + switch (params->auto_connect) { + case HCI_AUTO_CONN_DIRECT: + /* Only devices advertising with ADV_DIRECT_IND are + * triggering a connection attempt. This is allowing + * incoming connections from peripheral devices. + */ + if (adv_type != LE_ADV_DIRECT_IND) + return NULL; + break; + case HCI_AUTO_CONN_ALWAYS: + /* Devices advertising with ADV_IND or ADV_DIRECT_IND + * are triggering a connection attempt. This means + * that incoming connections from peripheral device are + * accepted and also outgoing connections to peripheral + * devices are established when found. + */ + break; + default: + return NULL; + } + } + + conn = hci_connect_le(hdev, addr, addr_type, addr_resolved, + BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout, + HCI_ROLE_MASTER); + if (!IS_ERR(conn)) { + /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned + * by higher layer that tried to connect, if no then + * store the pointer since we don't really have any + * other owner of the object besides the params that + * triggered it. This way we can abort the connection if + * the parameters get removed and keep the reference + * count consistent once the connection is established. + */ + + if (!params->explicit_connect) + params->conn = hci_conn_get(conn); + + return conn; + } + + switch (PTR_ERR(conn)) { + case -EBUSY: + /* If hci_connect() returns -EBUSY it means there is already + * an LE connection attempt going on. Since controllers don't + * support more than one connection attempt at the time, we + * don't consider this an error case. + */ + break; + default: + BT_DBG("Failed to connect: err %ld", PTR_ERR(conn)); + return NULL; + } + + return NULL; +} + +static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr, + u8 bdaddr_type, bdaddr_t *direct_addr, + u8 direct_addr_type, s8 rssi, u8 *data, u8 len, + bool ext_adv, bool ctl_time, u64 instant) +{ + struct discovery_state *d = &hdev->discovery; + struct smp_irk *irk; + struct hci_conn *conn; + bool match, bdaddr_resolved; + u32 flags; + u8 *ptr; + + switch (type) { + case LE_ADV_IND: + case LE_ADV_DIRECT_IND: + case LE_ADV_SCAN_IND: + case LE_ADV_NONCONN_IND: + case LE_ADV_SCAN_RSP: + break; + default: + bt_dev_err_ratelimited(hdev, "unknown advertising packet " + "type: 0x%02x", type); + return; + } + + if (len > max_adv_len(hdev)) { + bt_dev_err_ratelimited(hdev, + "adv larger than maximum supported"); + return; + } + + /* Find the end of the data in case the report contains padded zero + * bytes at the end causing an invalid length value. + * + * When data is NULL, len is 0 so there is no need for extra ptr + * check as 'ptr < data + 0' is already false in such case. + */ + for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) { + if (ptr + 1 + *ptr > data + len) + break; + } + + /* Adjust for actual length. This handles the case when remote + * device is advertising with incorrect data length. + */ + len = ptr - data; + + /* If the direct address is present, then this report is from + * a LE Direct Advertising Report event. In that case it is + * important to see if the address is matching the local + * controller address. + */ + if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) { + direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type, + &bdaddr_resolved); + + /* Only resolvable random addresses are valid for these + * kind of reports and others can be ignored. + */ + if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type)) + return; + + /* If the controller is not using resolvable random + * addresses, then this report can be ignored. + */ + if (!hci_dev_test_flag(hdev, HCI_PRIVACY)) + return; + + /* If the local IRK of the controller does not match + * with the resolvable random address provided, then + * this report can be ignored. + */ + if (!smp_irk_matches(hdev, hdev->irk, direct_addr)) + return; + } + + /* Check if we need to convert to identity address */ + irk = hci_get_irk(hdev, bdaddr, bdaddr_type); + if (irk) { + bdaddr = &irk->bdaddr; + bdaddr_type = irk->addr_type; + } + + bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved); + + /* Check if we have been requested to connect to this device. + * + * direct_addr is set only for directed advertising reports (it is NULL + * for advertising reports) and is already verified to be RPA above. + */ + conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved, + type); + if (!ext_adv && conn && type == LE_ADV_IND && + len <= max_adv_len(hdev)) { + /* Store report for later inclusion by + * mgmt_device_connected + */ + memcpy(conn->le_adv_data, data, len); + conn->le_adv_data_len = len; + } + + if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND) + flags = MGMT_DEV_FOUND_NOT_CONNECTABLE; + else + flags = 0; + + /* All scan results should be sent up for Mesh systems */ + if (hci_dev_test_flag(hdev, HCI_MESH)) { + mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, + rssi, flags, data, len, NULL, 0, instant); + return; + } + + /* Passive scanning shouldn't trigger any device found events, + * except for devices marked as CONN_REPORT for which we do send + * device found events, or advertisement monitoring requested. + */ + if (hdev->le_scan_type == LE_SCAN_PASSIVE) { + if (type == LE_ADV_DIRECT_IND) + return; + + if (!hci_pend_le_action_lookup(&hdev->pend_le_reports, + bdaddr, bdaddr_type) && + idr_is_empty(&hdev->adv_monitors_idr)) + return; + + mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, + rssi, flags, data, len, NULL, 0, 0); + return; + } + + /* When receiving a scan response, then there is no way to + * know if the remote device is connectable or not. However + * since scan responses are merged with a previously seen + * advertising report, the flags field from that report + * will be used. + * + * In the unlikely case that a controller just sends a scan + * response event that doesn't match the pending report, then + * it is marked as a standalone SCAN_RSP. + */ + if (type == LE_ADV_SCAN_RSP) + flags = MGMT_DEV_FOUND_SCAN_RSP; + + /* If there's nothing pending either store the data from this + * event or send an immediate device found event if the data + * should not be stored for later. + */ + if (!ext_adv && !has_pending_adv_report(hdev)) { + /* If the report will trigger a SCAN_REQ store it for + * later merging. + */ + if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) { + store_pending_adv_report(hdev, bdaddr, bdaddr_type, + rssi, flags, data, len); + return; + } + + mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, + rssi, flags, data, len, NULL, 0, 0); + return; + } + + /* Check if the pending report is for the same device as the new one */ + match = (!bacmp(bdaddr, &d->last_adv_addr) && + bdaddr_type == d->last_adv_addr_type); + + /* If the pending data doesn't match this report or this isn't a + * scan response (e.g. we got a duplicate ADV_IND) then force + * sending of the pending data. + */ + if (type != LE_ADV_SCAN_RSP || !match) { + /* Send out whatever is in the cache, but skip duplicates */ + if (!match) + mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, + d->last_adv_addr_type, NULL, + d->last_adv_rssi, d->last_adv_flags, + d->last_adv_data, + d->last_adv_data_len, NULL, 0, 0); + + /* If the new report will trigger a SCAN_REQ store it for + * later merging. + */ + if (!ext_adv && (type == LE_ADV_IND || + type == LE_ADV_SCAN_IND)) { + store_pending_adv_report(hdev, bdaddr, bdaddr_type, + rssi, flags, data, len); + return; + } + + /* The advertising reports cannot be merged, so clear + * the pending report and send out a device found event. + */ + clear_pending_adv_report(hdev); + mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, + rssi, flags, data, len, NULL, 0, 0); + return; + } + + /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and + * the new event is a SCAN_RSP. We can therefore proceed with + * sending a merged device found event. + */ + mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, + d->last_adv_addr_type, NULL, rssi, d->last_adv_flags, + d->last_adv_data, d->last_adv_data_len, data, len, 0); + clear_pending_adv_report(hdev); +} + +static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_advertising_report *ev = data; + u64 instant = jiffies; + + if (!ev->num) + return; + + hci_dev_lock(hdev); + + while (ev->num--) { + struct hci_ev_le_advertising_info *info; + s8 rssi; + + info = hci_le_ev_skb_pull(hdev, skb, + HCI_EV_LE_ADVERTISING_REPORT, + sizeof(*info)); + if (!info) + break; + + if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT, + info->length + 1)) + break; + + if (info->length <= max_adv_len(hdev)) { + rssi = info->data[info->length]; + process_adv_report(hdev, info->type, &info->bdaddr, + info->bdaddr_type, NULL, 0, rssi, + info->data, info->length, false, + false, instant); + } else { + bt_dev_err(hdev, "Dropping invalid advertising data"); + } + } + + hci_dev_unlock(hdev); +} + +static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type) +{ + if (evt_type & LE_EXT_ADV_LEGACY_PDU) { + switch (evt_type) { + case LE_LEGACY_ADV_IND: + return LE_ADV_IND; + case LE_LEGACY_ADV_DIRECT_IND: + return LE_ADV_DIRECT_IND; + case LE_LEGACY_ADV_SCAN_IND: + return LE_ADV_SCAN_IND; + case LE_LEGACY_NONCONN_IND: + return LE_ADV_NONCONN_IND; + case LE_LEGACY_SCAN_RSP_ADV: + case LE_LEGACY_SCAN_RSP_ADV_SCAN: + return LE_ADV_SCAN_RSP; + } + + goto invalid; + } + + if (evt_type & LE_EXT_ADV_CONN_IND) { + if (evt_type & LE_EXT_ADV_DIRECT_IND) + return LE_ADV_DIRECT_IND; + + return LE_ADV_IND; + } + + if (evt_type & LE_EXT_ADV_SCAN_RSP) + return LE_ADV_SCAN_RSP; + + if (evt_type & LE_EXT_ADV_SCAN_IND) + return LE_ADV_SCAN_IND; + + if (evt_type == LE_EXT_ADV_NON_CONN_IND || + evt_type & LE_EXT_ADV_DIRECT_IND) + return LE_ADV_NONCONN_IND; + +invalid: + bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x", + evt_type); + + return LE_ADV_INVALID; +} + +static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_ext_adv_report *ev = data; + u64 instant = jiffies; + + if (!ev->num) + return; + + hci_dev_lock(hdev); + + while (ev->num--) { + struct hci_ev_le_ext_adv_info *info; + u8 legacy_evt_type; + u16 evt_type; + + info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT, + sizeof(*info)); + if (!info) + break; + + if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT, + info->length)) + break; + + evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK; + legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type); + if (legacy_evt_type != LE_ADV_INVALID) { + process_adv_report(hdev, legacy_evt_type, &info->bdaddr, + info->bdaddr_type, NULL, 0, + info->rssi, info->data, info->length, + !(evt_type & LE_EXT_ADV_LEGACY_PDU), + false, instant); + } + } + + hci_dev_unlock(hdev); +} + +static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle) +{ + struct hci_cp_le_pa_term_sync cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = handle; + + return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp); +} + +static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_pa_sync_established *ev = data; + int mask = hdev->link_mode; + __u8 flags = 0; + struct hci_conn *pa_sync; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + hci_dev_clear_flag(hdev, HCI_PA_SYNC); + + mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags); + if (!(mask & HCI_LM_ACCEPT)) { + hci_le_pa_term_sync(hdev, ev->handle); + goto unlock; + } + + if (!(flags & HCI_PROTO_DEFER)) + goto unlock; + + if (ev->status) { + /* Add connection to indicate the failed PA sync event */ + pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY, + HCI_ROLE_SLAVE); + + if (!pa_sync) + goto unlock; + + set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags); + + /* Notify iso layer */ + hci_connect_cfm(pa_sync, ev->status); + } + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_per_adv_report *ev = data; + int mask = hdev->link_mode; + __u8 flags = 0; + + bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle)); + + hci_dev_lock(hdev); + + mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags); + if (!(mask & HCI_LM_ACCEPT)) + hci_le_pa_term_sync(hdev, ev->sync_handle); + + hci_dev_unlock(hdev); +} + +static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_remote_feat_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (conn) { + if (!ev->status) + memcpy(conn->features[0], ev->features, 8); + + if (conn->state == BT_CONFIG) { + __u8 status; + + /* If the local controller supports peripheral-initiated + * features exchange, but the remote controller does + * not, then it is possible that the error code 0x1a + * for unsupported remote feature gets returned. + * + * In this specific case, allow the connection to + * transition into connected state and mark it as + * successful. + */ + if (!conn->out && ev->status == 0x1a && + (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) + status = 0x00; + else + status = ev->status; + + conn->state = BT_CONNECTED; + hci_connect_cfm(conn, status); + hci_conn_drop(conn); + } + } + + hci_dev_unlock(hdev); +} + +static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_ltk_req *ev = data; + struct hci_cp_le_ltk_reply cp; + struct hci_cp_le_ltk_neg_reply neg; + struct hci_conn *conn; + struct smp_ltk *ltk; + + bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle)); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (conn == NULL) + goto not_found; + + ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role); + if (!ltk) + goto not_found; + + if (smp_ltk_is_sc(ltk)) { + /* With SC both EDiv and Rand are set to zero */ + if (ev->ediv || ev->rand) + goto not_found; + } else { + /* For non-SC keys check that EDiv and Rand match */ + if (ev->ediv != ltk->ediv || ev->rand != ltk->rand) + goto not_found; + } + + memcpy(cp.ltk, ltk->val, ltk->enc_size); + memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size); + cp.handle = cpu_to_le16(conn->handle); + + conn->pending_sec_level = smp_ltk_sec_level(ltk); + + conn->enc_key_size = ltk->enc_size; + + hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); + + /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a + * temporary key used to encrypt a connection following + * pairing. It is used during the Encrypted Session Setup to + * distribute the keys. Later, security can be re-established + * using a distributed LTK. + */ + if (ltk->type == SMP_STK) { + set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags); + list_del_rcu(<k->list); + kfree_rcu(ltk, rcu); + } else { + clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags); + } + + hci_dev_unlock(hdev); + + return; + +not_found: + neg.handle = ev->handle; + hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg); + hci_dev_unlock(hdev); +} + +static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle, + u8 reason) +{ + struct hci_cp_le_conn_param_req_neg_reply cp; + + cp.handle = cpu_to_le16(handle); + cp.reason = reason; + + hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp), + &cp); +} + +static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_remote_conn_param_req *ev = data; + struct hci_cp_le_conn_param_req_reply cp; + struct hci_conn *hcon; + u16 handle, min, max, latency, timeout; + + bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle)); + + handle = le16_to_cpu(ev->handle); + min = le16_to_cpu(ev->interval_min); + max = le16_to_cpu(ev->interval_max); + latency = le16_to_cpu(ev->latency); + timeout = le16_to_cpu(ev->timeout); + + hcon = hci_conn_hash_lookup_handle(hdev, handle); + if (!hcon || hcon->state != BT_CONNECTED) + return send_conn_param_neg_reply(hdev, handle, + HCI_ERROR_UNKNOWN_CONN_ID); + + if (hci_check_conn_params(min, max, latency, timeout)) + return send_conn_param_neg_reply(hdev, handle, + HCI_ERROR_INVALID_LL_PARAMS); + + if (hcon->role == HCI_ROLE_MASTER) { + struct hci_conn_params *params; + u8 store_hint; + + hci_dev_lock(hdev); + + params = hci_conn_params_lookup(hdev, &hcon->dst, + hcon->dst_type); + if (params) { + params->conn_min_interval = min; + params->conn_max_interval = max; + params->conn_latency = latency; + params->supervision_timeout = timeout; + store_hint = 0x01; + } else { + store_hint = 0x00; + } + + hci_dev_unlock(hdev); + + mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type, + store_hint, min, max, latency, timeout); + } + + cp.handle = ev->handle; + cp.interval_min = ev->interval_min; + cp.interval_max = ev->interval_max; + cp.latency = ev->latency; + cp.timeout = ev->timeout; + cp.min_ce_len = 0; + cp.max_ce_len = 0; + + hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp); +} + +static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_direct_adv_report *ev = data; + u64 instant = jiffies; + int i; + + if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT, + flex_array_size(ev, info, ev->num))) + return; + + if (!ev->num) + return; + + hci_dev_lock(hdev); + + for (i = 0; i < ev->num; i++) { + struct hci_ev_le_direct_adv_info *info = &ev->info[i]; + + process_adv_report(hdev, info->type, &info->bdaddr, + info->bdaddr_type, &info->direct_addr, + info->direct_addr_type, info->rssi, NULL, 0, + false, false, instant); + } + + hci_dev_unlock(hdev); +} + +static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_ev_le_phy_update_complete *ev = data; + struct hci_conn *conn; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + if (ev->status) + return; + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); + if (!conn) + goto unlock; + + conn->le_tx_phy = ev->tx_phy; + conn->le_rx_phy = ev->rx_phy; + +unlock: + hci_dev_unlock(hdev); +} + +static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_evt_le_cis_established *ev = data; + struct hci_conn *conn; + struct bt_iso_qos *qos; + bool pending = false; + u16 handle = __le16_to_cpu(ev->handle); + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + hci_dev_lock(hdev); + + conn = hci_conn_hash_lookup_handle(hdev, handle); + if (!conn) { + bt_dev_err(hdev, + "Unable to find connection with handle 0x%4.4x", + handle); + goto unlock; + } + + if (conn->type != ISO_LINK) { + bt_dev_err(hdev, + "Invalid connection link type handle 0x%4.4x", + handle); + goto unlock; + } + + qos = &conn->iso_qos; + + pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags); + + /* Convert ISO Interval (1.25 ms slots) to SDU Interval (us) */ + qos->ucast.in.interval = le16_to_cpu(ev->interval) * 1250; + qos->ucast.out.interval = qos->ucast.in.interval; + + switch (conn->role) { + case HCI_ROLE_SLAVE: + /* Convert Transport Latency (us) to Latency (msec) */ + qos->ucast.in.latency = + DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency), + 1000); + qos->ucast.out.latency = + DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency), + 1000); + qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu); + qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu); + qos->ucast.in.phy = ev->c_phy; + qos->ucast.out.phy = ev->p_phy; + break; + case HCI_ROLE_MASTER: + /* Convert Transport Latency (us) to Latency (msec) */ + qos->ucast.out.latency = + DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency), + 1000); + qos->ucast.in.latency = + DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency), + 1000); + qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu); + qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu); + qos->ucast.out.phy = ev->c_phy; + qos->ucast.in.phy = ev->p_phy; + break; + } + + if (!ev->status) { + conn->state = BT_CONNECTED; + hci_debugfs_create_conn(conn); + hci_conn_add_sysfs(conn); + hci_iso_setup_path(conn); + goto unlock; + } + + conn->state = BT_CLOSED; + hci_connect_cfm(conn, ev->status); + hci_conn_del(conn); + +unlock: + if (pending) + hci_le_create_cis_pending(hdev); + + hci_dev_unlock(hdev); +} + +static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle) +{ + struct hci_cp_le_reject_cis cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = handle; + cp.reason = HCI_ERROR_REJ_BAD_ADDR; + hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp); +} + +static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle) +{ + struct hci_cp_le_accept_cis cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = handle; + hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp); +} + +static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_evt_le_cis_req *ev = data; + u16 acl_handle, cis_handle; + struct hci_conn *acl, *cis; + int mask; + __u8 flags = 0; + + acl_handle = __le16_to_cpu(ev->acl_handle); + cis_handle = __le16_to_cpu(ev->cis_handle); + + bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x", + acl_handle, cis_handle, ev->cig_id, ev->cis_id); + + hci_dev_lock(hdev); + + acl = hci_conn_hash_lookup_handle(hdev, acl_handle); + if (!acl) + goto unlock; + + mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags); + if (!(mask & HCI_LM_ACCEPT)) { + hci_le_reject_cis(hdev, ev->cis_handle); + goto unlock; + } + + cis = hci_conn_hash_lookup_handle(hdev, cis_handle); + if (!cis) { + cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE, + cis_handle); + if (!cis) { + hci_le_reject_cis(hdev, ev->cis_handle); + goto unlock; + } + } + + cis->iso_qos.ucast.cig = ev->cig_id; + cis->iso_qos.ucast.cis = ev->cis_id; + + if (!(flags & HCI_PROTO_DEFER)) { + hci_le_accept_cis(hdev, ev->cis_handle); + } else { + cis->state = BT_CONNECT2; + hci_connect_cfm(cis, 0); + } + +unlock: + hci_dev_unlock(hdev); +} + +static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data) +{ + u8 handle = PTR_UINT(data); + + return hci_le_terminate_big_sync(hdev, handle, + HCI_ERROR_LOCAL_HOST_TERM); +} + +static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_evt_le_create_big_complete *ev = data; + struct hci_conn *conn; + __u8 i = 0; + + BT_DBG("%s status 0x%2.2x", hdev->name, ev->status); + + if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE, + flex_array_size(ev, bis_handle, ev->num_bis))) + return; + + hci_dev_lock(hdev); + rcu_read_lock(); + + /* Connect all BISes that are bound to the BIG */ + list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) { + if (bacmp(&conn->dst, BDADDR_ANY) || + conn->type != ISO_LINK || + conn->iso_qos.bcast.big != ev->handle) + continue; + + if (hci_conn_set_handle(conn, + __le16_to_cpu(ev->bis_handle[i++]))) + continue; + + if (!ev->status) { + conn->state = BT_CONNECTED; + set_bit(HCI_CONN_BIG_CREATED, &conn->flags); + rcu_read_unlock(); + hci_debugfs_create_conn(conn); + hci_conn_add_sysfs(conn); + hci_iso_setup_path(conn); + rcu_read_lock(); + continue; + } + + hci_connect_cfm(conn, ev->status); + rcu_read_unlock(); + hci_conn_del(conn); + rcu_read_lock(); + } + + rcu_read_unlock(); + + if (!ev->status && !i) + /* If no BISes have been connected for the BIG, + * terminate. This is in case all bound connections + * have been closed before the BIG creation + * has completed. + */ + hci_cmd_sync_queue(hdev, hci_iso_term_big_sync, + UINT_PTR(ev->handle), NULL); + + hci_dev_unlock(hdev); +} + +static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_evt_le_big_sync_estabilished *ev = data; + struct hci_conn *bis; + struct hci_conn *pa_sync; + int i; + + bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); + + if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED, + flex_array_size(ev, bis, ev->num_bis))) + return; + + hci_dev_lock(hdev); + + if (!ev->status) { + pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle); + if (pa_sync) + /* Also mark the BIG sync established event on the + * associated PA sync hcon + */ + set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags); + } + + for (i = 0; i < ev->num_bis; i++) { + u16 handle = le16_to_cpu(ev->bis[i]); + __le32 interval; + + bis = hci_conn_hash_lookup_handle(hdev, handle); + if (!bis) { + bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY, + HCI_ROLE_SLAVE, handle); + if (!bis) + continue; + } + + if (ev->status != 0x42) + /* Mark PA sync as established */ + set_bit(HCI_CONN_PA_SYNC, &bis->flags); + + bis->iso_qos.bcast.big = ev->handle; + memset(&interval, 0, sizeof(interval)); + memcpy(&interval, ev->latency, sizeof(ev->latency)); + bis->iso_qos.bcast.in.interval = le32_to_cpu(interval); + /* Convert ISO Interval (1.25 ms slots) to latency (ms) */ + bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100; + bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu); + + if (!ev->status) { + set_bit(HCI_CONN_BIG_SYNC, &bis->flags); + hci_iso_setup_path(bis); + } + } + + /* In case BIG sync failed, notify each failed connection to + * the user after all hci connections have been added + */ + if (ev->status) + for (i = 0; i < ev->num_bis; i++) { + u16 handle = le16_to_cpu(ev->bis[i]); + + bis = hci_conn_hash_lookup_handle(hdev, handle); + + set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags); + hci_connect_cfm(bis, ev->status); + } + + hci_dev_unlock(hdev); +} + +static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb) +{ + struct hci_evt_le_big_info_adv_report *ev = data; + int mask = hdev->link_mode; + __u8 flags = 0; + struct hci_conn *pa_sync; + + bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle)); + + hci_dev_lock(hdev); + + mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags); + if (!(mask & HCI_LM_ACCEPT)) { + hci_le_pa_term_sync(hdev, ev->sync_handle); + goto unlock; + } + + if (!(flags & HCI_PROTO_DEFER)) + goto unlock; + + pa_sync = hci_conn_hash_lookup_pa_sync_handle + (hdev, + le16_to_cpu(ev->sync_handle)); + + if (pa_sync) + goto unlock; + + /* Add connection to indicate the PA sync event */ + pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY, + HCI_ROLE_SLAVE); + + if (!pa_sync) + goto unlock; + + pa_sync->sync_handle = le16_to_cpu(ev->sync_handle); + set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags); + + /* Notify iso layer */ + hci_connect_cfm(pa_sync, 0x00); + +unlock: + hci_dev_unlock(hdev); +} + +#define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \ +[_op] = { \ + .func = _func, \ + .min_len = _min_len, \ + .max_len = _max_len, \ +} + +#define HCI_LE_EV(_op, _func, _len) \ + HCI_LE_EV_VL(_op, _func, _len, _len) + +#define HCI_LE_EV_STATUS(_op, _func) \ + HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status)) + +/* Entries in this table shall have their position according to the subevent + * opcode they handle so the use of the macros above is recommend since it does + * attempt to initialize at its proper index using Designated Initializers that + * way events without a callback function can be ommited. + */ +static const struct hci_le_ev { + void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb); + u16 min_len; + u16 max_len; +} hci_le_ev_table[U8_MAX + 1] = { + /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */ + HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt, + sizeof(struct hci_ev_le_conn_complete)), + /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */ + HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt, + sizeof(struct hci_ev_le_advertising_report), + HCI_MAX_EVENT_SIZE), + /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */ + HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE, + hci_le_conn_update_complete_evt, + sizeof(struct hci_ev_le_conn_update_complete)), + /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */ + HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE, + hci_le_remote_feat_complete_evt, + sizeof(struct hci_ev_le_remote_feat_complete)), + /* [0x05 = HCI_EV_LE_LTK_REQ] */ + HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt, + sizeof(struct hci_ev_le_ltk_req)), + /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */ + HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ, + hci_le_remote_conn_param_req_evt, + sizeof(struct hci_ev_le_remote_conn_param_req)), + /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */ + HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE, + hci_le_enh_conn_complete_evt, + sizeof(struct hci_ev_le_enh_conn_complete)), + /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */ + HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt, + sizeof(struct hci_ev_le_direct_adv_report), + HCI_MAX_EVENT_SIZE), + /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */ + HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt, + sizeof(struct hci_ev_le_phy_update_complete)), + /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */ + HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt, + sizeof(struct hci_ev_le_ext_adv_report), + HCI_MAX_EVENT_SIZE), + /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */ + HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED, + hci_le_pa_sync_estabilished_evt, + sizeof(struct hci_ev_le_pa_sync_established)), + /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */ + HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT, + hci_le_per_adv_report_evt, + sizeof(struct hci_ev_le_per_adv_report), + HCI_MAX_EVENT_SIZE), + /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */ + HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt, + sizeof(struct hci_evt_le_ext_adv_set_term)), + /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */ + HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt, + sizeof(struct hci_evt_le_cis_established)), + /* [0x1a = HCI_EVT_LE_CIS_REQ] */ + HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt, + sizeof(struct hci_evt_le_cis_req)), + /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */ + HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE, + hci_le_create_big_complete_evt, + sizeof(struct hci_evt_le_create_big_complete), + HCI_MAX_EVENT_SIZE), + /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */ + HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED, + hci_le_big_sync_established_evt, + sizeof(struct hci_evt_le_big_sync_estabilished), + HCI_MAX_EVENT_SIZE), + /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */ + HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT, + hci_le_big_info_adv_report_evt, + sizeof(struct hci_evt_le_big_info_adv_report), + HCI_MAX_EVENT_SIZE), +}; + +static void hci_le_meta_evt(struct hci_dev *hdev, void *data, + struct sk_buff *skb, u16 *opcode, u8 *status, + hci_req_complete_t *req_complete, + hci_req_complete_skb_t *req_complete_skb) +{ + struct hci_ev_le_meta *ev = data; + const struct hci_le_ev *subev; + + bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent); + + /* Only match event if command OGF is for LE */ + if (hdev->sent_cmd && + hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) == 0x08 && + hci_skb_event(hdev->sent_cmd) == ev->subevent) { + *opcode = hci_skb_opcode(hdev->sent_cmd); + hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete, + req_complete_skb); + } + + subev = &hci_le_ev_table[ev->subevent]; + if (!subev->func) + return; + + if (skb->len < subev->min_len) { + bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u", + ev->subevent, skb->len, subev->min_len); + return; + } + + /* Just warn if the length is over max_len size it still be + * possible to partially parse the event so leave to callback to + * decide if that is acceptable. + */ + if (skb->len > subev->max_len) + bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u", + ev->subevent, skb->len, subev->max_len); + data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len); + if (!data) + return; + + subev->func(hdev, data, skb); +} + +static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode, + u8 event, struct sk_buff *skb) +{ + struct hci_ev_cmd_complete *ev; + struct hci_event_hdr *hdr; + + if (!skb) + return false; + + hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr)); + if (!hdr) + return false; + + if (event) { + if (hdr->evt != event) + return false; + return true; + } + + /* Check if request ended in Command Status - no way to retrieve + * any extra parameters in this case. + */ + if (hdr->evt == HCI_EV_CMD_STATUS) + return false; + + if (hdr->evt != HCI_EV_CMD_COMPLETE) { + bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)", + hdr->evt); + return false; + } + + ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev)); + if (!ev) + return false; + + if (opcode != __le16_to_cpu(ev->opcode)) { + BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode, + __le16_to_cpu(ev->opcode)); + return false; + } + + return true; +} + +static void hci_store_wake_reason(struct hci_dev *hdev, u8 event, + struct sk_buff *skb) +{ + struct hci_ev_le_advertising_info *adv; + struct hci_ev_le_direct_adv_info *direct_adv; + struct hci_ev_le_ext_adv_info *ext_adv; + const struct hci_ev_conn_complete *conn_complete = (void *)skb->data; + const struct hci_ev_conn_request *conn_request = (void *)skb->data; + + hci_dev_lock(hdev); + + /* If we are currently suspended and this is the first BT event seen, + * save the wake reason associated with the event. + */ + if (!hdev->suspended || hdev->wake_reason) + goto unlock; + + /* Default to remote wake. Values for wake_reason are documented in the + * Bluez mgmt api docs. + */ + hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE; + + /* Once configured for remote wakeup, we should only wake up for + * reconnections. It's useful to see which device is waking us up so + * keep track of the bdaddr of the connection event that woke us up. + */ + if (event == HCI_EV_CONN_REQUEST) { + bacpy(&hdev->wake_addr, &conn_complete->bdaddr); + hdev->wake_addr_type = BDADDR_BREDR; + } else if (event == HCI_EV_CONN_COMPLETE) { + bacpy(&hdev->wake_addr, &conn_request->bdaddr); + hdev->wake_addr_type = BDADDR_BREDR; + } else if (event == HCI_EV_LE_META) { + struct hci_ev_le_meta *le_ev = (void *)skb->data; + u8 subevent = le_ev->subevent; + u8 *ptr = &skb->data[sizeof(*le_ev)]; + u8 num_reports = *ptr; + + if ((subevent == HCI_EV_LE_ADVERTISING_REPORT || + subevent == HCI_EV_LE_DIRECT_ADV_REPORT || + subevent == HCI_EV_LE_EXT_ADV_REPORT) && + num_reports) { + adv = (void *)(ptr + 1); + direct_adv = (void *)(ptr + 1); + ext_adv = (void *)(ptr + 1); + + switch (subevent) { + case HCI_EV_LE_ADVERTISING_REPORT: + bacpy(&hdev->wake_addr, &adv->bdaddr); + hdev->wake_addr_type = adv->bdaddr_type; + break; + case HCI_EV_LE_DIRECT_ADV_REPORT: + bacpy(&hdev->wake_addr, &direct_adv->bdaddr); + hdev->wake_addr_type = direct_adv->bdaddr_type; + break; + case HCI_EV_LE_EXT_ADV_REPORT: + bacpy(&hdev->wake_addr, &ext_adv->bdaddr); + hdev->wake_addr_type = ext_adv->bdaddr_type; + break; + } + } + } else { + hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED; + } + +unlock: + hci_dev_unlock(hdev); +} + +#define HCI_EV_VL(_op, _func, _min_len, _max_len) \ +[_op] = { \ + .req = false, \ + .func = _func, \ + .min_len = _min_len, \ + .max_len = _max_len, \ +} + +#define HCI_EV(_op, _func, _len) \ + HCI_EV_VL(_op, _func, _len, _len) + +#define HCI_EV_STATUS(_op, _func) \ + HCI_EV(_op, _func, sizeof(struct hci_ev_status)) + +#define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \ +[_op] = { \ + .req = true, \ + .func_req = _func, \ + .min_len = _min_len, \ + .max_len = _max_len, \ +} + +#define HCI_EV_REQ(_op, _func, _len) \ + HCI_EV_REQ_VL(_op, _func, _len, _len) + +/* Entries in this table shall have their position according to the event opcode + * they handle so the use of the macros above is recommend since it does attempt + * to initialize at its proper index using Designated Initializers that way + * events without a callback function don't have entered. + */ +static const struct hci_ev { + bool req; + union { + void (*func)(struct hci_dev *hdev, void *data, + struct sk_buff *skb); + void (*func_req)(struct hci_dev *hdev, void *data, + struct sk_buff *skb, u16 *opcode, u8 *status, + hci_req_complete_t *req_complete, + hci_req_complete_skb_t *req_complete_skb); + }; + u16 min_len; + u16 max_len; +} hci_ev_table[U8_MAX + 1] = { + /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */ + HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt), + /* [0x02 = HCI_EV_INQUIRY_RESULT] */ + HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt, + sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE), + /* [0x03 = HCI_EV_CONN_COMPLETE] */ + HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt, + sizeof(struct hci_ev_conn_complete)), + /* [0x04 = HCI_EV_CONN_REQUEST] */ + HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt, + sizeof(struct hci_ev_conn_request)), + /* [0x05 = HCI_EV_DISCONN_COMPLETE] */ + HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt, + sizeof(struct hci_ev_disconn_complete)), + /* [0x06 = HCI_EV_AUTH_COMPLETE] */ + HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt, + sizeof(struct hci_ev_auth_complete)), + /* [0x07 = HCI_EV_REMOTE_NAME] */ + HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt, + sizeof(struct hci_ev_remote_name)), + /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */ + HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt, + sizeof(struct hci_ev_encrypt_change)), + /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */ + HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE, + hci_change_link_key_complete_evt, + sizeof(struct hci_ev_change_link_key_complete)), + /* [0x0b = HCI_EV_REMOTE_FEATURES] */ + HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt, + sizeof(struct hci_ev_remote_features)), + /* [0x0e = HCI_EV_CMD_COMPLETE] */ + HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt, + sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE), + /* [0x0f = HCI_EV_CMD_STATUS] */ + HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt, + sizeof(struct hci_ev_cmd_status)), + /* [0x10 = HCI_EV_CMD_STATUS] */ + HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt, + sizeof(struct hci_ev_hardware_error)), + /* [0x12 = HCI_EV_ROLE_CHANGE] */ + HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt, + sizeof(struct hci_ev_role_change)), + /* [0x13 = HCI_EV_NUM_COMP_PKTS] */ + HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt, + sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE), + /* [0x14 = HCI_EV_MODE_CHANGE] */ + HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt, + sizeof(struct hci_ev_mode_change)), + /* [0x16 = HCI_EV_PIN_CODE_REQ] */ + HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt, + sizeof(struct hci_ev_pin_code_req)), + /* [0x17 = HCI_EV_LINK_KEY_REQ] */ + HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt, + sizeof(struct hci_ev_link_key_req)), + /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */ + HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt, + sizeof(struct hci_ev_link_key_notify)), + /* [0x1c = HCI_EV_CLOCK_OFFSET] */ + HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt, + sizeof(struct hci_ev_clock_offset)), + /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */ + HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt, + sizeof(struct hci_ev_pkt_type_change)), + /* [0x20 = HCI_EV_PSCAN_REP_MODE] */ + HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt, + sizeof(struct hci_ev_pscan_rep_mode)), + /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */ + HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI, + hci_inquiry_result_with_rssi_evt, + sizeof(struct hci_ev_inquiry_result_rssi), + HCI_MAX_EVENT_SIZE), + /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */ + HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt, + sizeof(struct hci_ev_remote_ext_features)), + /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */ + HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt, + sizeof(struct hci_ev_sync_conn_complete)), + /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */ + HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT, + hci_extended_inquiry_result_evt, + sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE), + /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */ + HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt, + sizeof(struct hci_ev_key_refresh_complete)), + /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */ + HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt, + sizeof(struct hci_ev_io_capa_request)), + /* [0x32 = HCI_EV_IO_CAPA_REPLY] */ + HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt, + sizeof(struct hci_ev_io_capa_reply)), + /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */ + HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt, + sizeof(struct hci_ev_user_confirm_req)), + /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */ + HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt, + sizeof(struct hci_ev_user_passkey_req)), + /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */ + HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt, + sizeof(struct hci_ev_remote_oob_data_request)), + /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */ + HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt, + sizeof(struct hci_ev_simple_pair_complete)), + /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */ + HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt, + sizeof(struct hci_ev_user_passkey_notify)), + /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */ + HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt, + sizeof(struct hci_ev_keypress_notify)), + /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */ + HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt, + sizeof(struct hci_ev_remote_host_features)), + /* [0x3e = HCI_EV_LE_META] */ + HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt, + sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE), +#if IS_ENABLED(CONFIG_BT_HS) + /* [0x40 = HCI_EV_PHY_LINK_COMPLETE] */ + HCI_EV(HCI_EV_PHY_LINK_COMPLETE, hci_phy_link_complete_evt, + sizeof(struct hci_ev_phy_link_complete)), + /* [0x41 = HCI_EV_CHANNEL_SELECTED] */ + HCI_EV(HCI_EV_CHANNEL_SELECTED, hci_chan_selected_evt, + sizeof(struct hci_ev_channel_selected)), + /* [0x42 = HCI_EV_DISCONN_PHY_LINK_COMPLETE] */ + HCI_EV(HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE, + hci_disconn_loglink_complete_evt, + sizeof(struct hci_ev_disconn_logical_link_complete)), + /* [0x45 = HCI_EV_LOGICAL_LINK_COMPLETE] */ + HCI_EV(HCI_EV_LOGICAL_LINK_COMPLETE, hci_loglink_complete_evt, + sizeof(struct hci_ev_logical_link_complete)), + /* [0x46 = HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE] */ + HCI_EV(HCI_EV_DISCONN_PHY_LINK_COMPLETE, + hci_disconn_phylink_complete_evt, + sizeof(struct hci_ev_disconn_phy_link_complete)), +#endif + /* [0x48 = HCI_EV_NUM_COMP_BLOCKS] */ + HCI_EV(HCI_EV_NUM_COMP_BLOCKS, hci_num_comp_blocks_evt, + sizeof(struct hci_ev_num_comp_blocks)), + /* [0xff = HCI_EV_VENDOR] */ + HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE), +}; + +static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb, + u16 *opcode, u8 *status, + hci_req_complete_t *req_complete, + hci_req_complete_skb_t *req_complete_skb) +{ + const struct hci_ev *ev = &hci_ev_table[event]; + void *data; + + if (!ev->func) + return; + + if (skb->len < ev->min_len) { + bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u", + event, skb->len, ev->min_len); + return; + } + + /* Just warn if the length is over max_len size it still be + * possible to partially parse the event so leave to callback to + * decide if that is acceptable. + */ + if (skb->len > ev->max_len) + bt_dev_warn_ratelimited(hdev, + "unexpected event 0x%2.2x length: %u > %u", + event, skb->len, ev->max_len); + + data = hci_ev_skb_pull(hdev, skb, event, ev->min_len); + if (!data) + return; + + if (ev->req) + ev->func_req(hdev, data, skb, opcode, status, req_complete, + req_complete_skb); + else + ev->func(hdev, data, skb); +} + +void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct hci_event_hdr *hdr = (void *) skb->data; + hci_req_complete_t req_complete = NULL; + hci_req_complete_skb_t req_complete_skb = NULL; + struct sk_buff *orig_skb = NULL; + u8 status = 0, event, req_evt = 0; + u16 opcode = HCI_OP_NOP; + + if (skb->len < sizeof(*hdr)) { + bt_dev_err(hdev, "Malformed HCI Event"); + goto done; + } + + kfree_skb(hdev->recv_event); + hdev->recv_event = skb_clone(skb, GFP_KERNEL); + + event = hdr->evt; + if (!event) { + bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x", + event); + goto done; + } + + /* Only match event if command OGF is not for LE */ + if (hdev->sent_cmd && + hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) != 0x08 && + hci_skb_event(hdev->sent_cmd) == event) { + hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->sent_cmd), + status, &req_complete, &req_complete_skb); + req_evt = event; + } + + /* If it looks like we might end up having to call + * req_complete_skb, store a pristine copy of the skb since the + * various handlers may modify the original one through + * skb_pull() calls, etc. + */ + if (req_complete_skb || event == HCI_EV_CMD_STATUS || + event == HCI_EV_CMD_COMPLETE) + orig_skb = skb_clone(skb, GFP_KERNEL); + + skb_pull(skb, HCI_EVENT_HDR_SIZE); + + /* Store wake reason if we're suspended */ + hci_store_wake_reason(hdev, event, skb); + + bt_dev_dbg(hdev, "event 0x%2.2x", event); + + hci_event_func(hdev, event, skb, &opcode, &status, &req_complete, + &req_complete_skb); + + if (req_complete) { + req_complete(hdev, status, opcode); + } else if (req_complete_skb) { + if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) { + kfree_skb(orig_skb); + orig_skb = NULL; + } + req_complete_skb(hdev, status, opcode, orig_skb); + } + +done: + kfree_skb(orig_skb); + kfree_skb(skb); + hdev->stat.evt_rx++; +} |