From e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Sat, 19 Feb 2011 12:05:56 -0300 Subject: Bluetooth: Add mgmt_pair_device command This patch adds a new mgmt_pair_device which can be used to initiate a dedicated bonding procedure. Some extra callbacks are added to the hci_conn struct so that the pairing code can get notified of the completion of the procedure. Signed-off-by: Johan Hedberg Signed-off-by: Gustavo F. Padovan --- net/bluetooth/mgmt.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) (limited to 'net/bluetooth') diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 52e5f88b753a..d7fc54dcbc9e 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -38,6 +38,7 @@ struct pending_cmd { int index; void *cmd; struct sock *sk; + void *user_data; }; LIST_HEAD(cmd_list); @@ -1063,6 +1064,135 @@ static int set_io_capability(struct sock *sk, unsigned char *data, u16 len) &dev_id, sizeof(dev_id)); } +static inline struct pending_cmd *find_pairing(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + struct list_head *p; + + list_for_each(p, &cmd_list) { + struct pending_cmd *cmd; + + cmd = list_entry(p, struct pending_cmd, list); + + if (cmd->opcode != MGMT_OP_PAIR_DEVICE) + continue; + + if (cmd->index != hdev->id) + continue; + + if (cmd->user_data != conn) + continue; + + return cmd; + } + + return NULL; +} + +static void pairing_complete(struct pending_cmd *cmd, u8 status) +{ + struct mgmt_rp_pair_device rp; + struct hci_conn *conn = cmd->user_data; + + rp.index = cmd->index; + bacpy(&rp.bdaddr, &conn->dst); + rp.status = status; + + cmd_complete(cmd->sk, MGMT_OP_PAIR_DEVICE, &rp, sizeof(rp)); + + /* So we don't get further callbacks for this connection */ + conn->connect_cfm_cb = NULL; + conn->security_cfm_cb = NULL; + conn->disconn_cfm_cb = NULL; + + hci_conn_put(conn); + + list_del(&cmd->list); + mgmt_pending_free(cmd); +} + +static void pairing_complete_cb(struct hci_conn *conn, u8 status) +{ + struct pending_cmd *cmd; + + BT_DBG("status %u", status); + + cmd = find_pairing(conn); + if (!cmd) { + BT_DBG("Unable to find a pending command"); + return; + } + + pairing_complete(cmd, status); +} + +static int pair_device(struct sock *sk, unsigned char *data, u16 len) +{ + struct hci_dev *hdev; + struct mgmt_cp_pair_device *cp; + struct pending_cmd *cmd; + u8 sec_level, auth_type; + struct hci_conn *conn; + u16 dev_id; + int err; + + BT_DBG(""); + + cp = (void *) data; + dev_id = get_unaligned_le16(&cp->index); + + hdev = hci_dev_get(dev_id); + if (!hdev) + return cmd_status(sk, MGMT_OP_PAIR_DEVICE, ENODEV); + + hci_dev_lock_bh(hdev); + + if (cp->io_cap == 0x03) { + sec_level = BT_SECURITY_MEDIUM; + auth_type = HCI_AT_DEDICATED_BONDING; + } else { + sec_level = BT_SECURITY_HIGH; + auth_type = HCI_AT_DEDICATED_BONDING_MITM; + } + + conn = hci_connect(hdev, ACL_LINK, &cp->bdaddr, sec_level, auth_type); + if (!conn) { + err = -ENOMEM; + goto unlock; + } + + if (conn->connect_cfm_cb) { + hci_conn_put(conn); + err = cmd_status(sk, MGMT_OP_PAIR_DEVICE, EBUSY); + goto unlock; + } + + cmd = mgmt_pending_add(sk, MGMT_OP_PAIR_DEVICE, dev_id, data, len); + if (!cmd) { + err = -ENOMEM; + hci_conn_put(conn); + goto unlock; + } + + conn->connect_cfm_cb = pairing_complete_cb; + conn->security_cfm_cb = pairing_complete_cb; + conn->disconn_cfm_cb = pairing_complete_cb; + conn->io_capability = cp->io_cap; + cmd->user_data = conn; + + if (conn->state == BT_CONNECTED && + hci_conn_security(conn, sec_level, auth_type)) + pairing_complete(cmd, 0); + + err = 0; + +unlock: + hci_dev_unlock_bh(hdev); + hci_dev_put(hdev); + + return err; +} + int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) { unsigned char *buf; @@ -1148,6 +1278,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) case MGMT_OP_SET_IO_CAPABILITY: err = set_io_capability(sk, buf + sizeof(*hdr), len); break; + case MGMT_OP_PAIR_DEVICE: + err = pair_device(sk, buf + sizeof(*hdr), len); + break; default: BT_DBG("Unknown op %u", opcode); err = cmd_status(sk, opcode, 0x01); -- cgit v1.2.3