| /* |
| BlueZ - Bluetooth protocol stack for Linux |
| |
| Copyright (C) 2015 Intel Corporation |
| |
| 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. |
| */ |
| |
| #include <asm/unaligned.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| #include <net/bluetooth/hci_mon.h> |
| #include <net/bluetooth/mgmt.h> |
| |
| #include "mgmt_util.h" |
| |
| static struct sk_buff *create_monitor_ctrl_event(__le16 index, u32 cookie, |
| u16 opcode, u16 len, void *buf) |
| { |
| struct hci_mon_hdr *hdr; |
| struct sk_buff *skb; |
| |
| skb = bt_skb_alloc(6 + len, GFP_ATOMIC); |
| if (!skb) |
| return NULL; |
| |
| put_unaligned_le32(cookie, skb_put(skb, 4)); |
| put_unaligned_le16(opcode, skb_put(skb, 2)); |
| |
| if (buf) |
| skb_put_data(skb, buf, len); |
| |
| __net_timestamp(skb); |
| |
| hdr = skb_push(skb, HCI_MON_HDR_SIZE); |
| hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT); |
| hdr->index = index; |
| hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); |
| |
| return skb; |
| } |
| |
| struct sk_buff *mgmt_alloc_skb(struct hci_dev *hdev, u16 opcode, |
| unsigned int size) |
| { |
| struct sk_buff *skb; |
| |
| skb = alloc_skb(sizeof(struct mgmt_hdr) + size, GFP_KERNEL); |
| if (!skb) |
| return skb; |
| |
| skb_reserve(skb, sizeof(struct mgmt_hdr)); |
| bt_cb(skb)->mgmt.hdev = hdev; |
| bt_cb(skb)->mgmt.opcode = opcode; |
| |
| return skb; |
| } |
| |
| int mgmt_send_event_skb(unsigned short channel, struct sk_buff *skb, int flag, |
| struct sock *skip_sk) |
| { |
| struct hci_dev *hdev; |
| struct mgmt_hdr *hdr; |
| int len; |
| |
| if (!skb) |
| return -EINVAL; |
| |
| len = skb->len; |
| hdev = bt_cb(skb)->mgmt.hdev; |
| |
| /* Time stamp */ |
| __net_timestamp(skb); |
| |
| /* Send just the data, without headers, to the monitor */ |
| if (channel == HCI_CHANNEL_CONTROL) |
| hci_send_monitor_ctrl_event(hdev, bt_cb(skb)->mgmt.opcode, |
| skb->data, skb->len, |
| skb_get_ktime(skb), flag, skip_sk); |
| |
| hdr = skb_push(skb, sizeof(*hdr)); |
| hdr->opcode = cpu_to_le16(bt_cb(skb)->mgmt.opcode); |
| if (hdev) |
| hdr->index = cpu_to_le16(hdev->id); |
| else |
| hdr->index = cpu_to_le16(MGMT_INDEX_NONE); |
| hdr->len = cpu_to_le16(len); |
| |
| hci_send_to_channel(channel, skb, flag, skip_sk); |
| |
| kfree_skb(skb); |
| return 0; |
| } |
| |
| int mgmt_send_event(u16 event, struct hci_dev *hdev, unsigned short channel, |
| void *data, u16 data_len, int flag, struct sock *skip_sk) |
| { |
| struct sk_buff *skb; |
| |
| skb = mgmt_alloc_skb(hdev, event, data_len); |
| if (!skb) |
| return -ENOMEM; |
| |
| if (data) |
| skb_put_data(skb, data, data_len); |
| |
| return mgmt_send_event_skb(channel, skb, flag, skip_sk); |
| } |
| |
| int mgmt_cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status) |
| { |
| struct sk_buff *skb, *mskb; |
| struct mgmt_hdr *hdr; |
| struct mgmt_ev_cmd_status *ev; |
| int err; |
| |
| BT_DBG("sock %p, index %u, cmd %u, status %u", sk, index, cmd, status); |
| |
| skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL); |
| if (!skb) |
| return -ENOMEM; |
| |
| hdr = skb_put(skb, sizeof(*hdr)); |
| |
| hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS); |
| hdr->index = cpu_to_le16(index); |
| hdr->len = cpu_to_le16(sizeof(*ev)); |
| |
| ev = skb_put(skb, sizeof(*ev)); |
| ev->status = status; |
| ev->opcode = cpu_to_le16(cmd); |
| |
| mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk), |
| MGMT_EV_CMD_STATUS, sizeof(*ev), ev); |
| if (mskb) |
| skb->tstamp = mskb->tstamp; |
| else |
| __net_timestamp(skb); |
| |
| err = sock_queue_rcv_skb(sk, skb); |
| if (err < 0) |
| kfree_skb(skb); |
| |
| if (mskb) { |
| hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb, |
| HCI_SOCK_TRUSTED, NULL); |
| kfree_skb(mskb); |
| } |
| |
| return err; |
| } |
| |
| int mgmt_cmd_complete(struct sock *sk, u16 index, u16 cmd, u8 status, |
| void *rp, size_t rp_len) |
| { |
| struct sk_buff *skb, *mskb; |
| struct mgmt_hdr *hdr; |
| struct mgmt_ev_cmd_complete *ev; |
| int err; |
| |
| BT_DBG("sock %p", sk); |
| |
| skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL); |
| if (!skb) |
| return -ENOMEM; |
| |
| hdr = skb_put(skb, sizeof(*hdr)); |
| |
| hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE); |
| hdr->index = cpu_to_le16(index); |
| hdr->len = cpu_to_le16(sizeof(*ev) + rp_len); |
| |
| ev = skb_put(skb, sizeof(*ev) + rp_len); |
| ev->opcode = cpu_to_le16(cmd); |
| ev->status = status; |
| |
| if (rp) |
| memcpy(ev->data, rp, rp_len); |
| |
| mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk), |
| MGMT_EV_CMD_COMPLETE, |
| sizeof(*ev) + rp_len, ev); |
| if (mskb) |
| skb->tstamp = mskb->tstamp; |
| else |
| __net_timestamp(skb); |
| |
| err = sock_queue_rcv_skb(sk, skb); |
| if (err < 0) |
| kfree_skb(skb); |
| |
| if (mskb) { |
| hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb, |
| HCI_SOCK_TRUSTED, NULL); |
| kfree_skb(mskb); |
| } |
| |
| return err; |
| } |
| |
| struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16 opcode, |
| struct hci_dev *hdev) |
| { |
| struct mgmt_pending_cmd *cmd; |
| |
| list_for_each_entry(cmd, &hdev->mgmt_pending, list) { |
| if (hci_sock_get_channel(cmd->sk) != channel) |
| continue; |
| if (cmd->opcode == opcode) |
| return cmd; |
| } |
| |
| return NULL; |
| } |
| |
| struct mgmt_pending_cmd *mgmt_pending_find_data(unsigned short channel, |
| u16 opcode, |
| struct hci_dev *hdev, |
| const void *data) |
| { |
| struct mgmt_pending_cmd *cmd; |
| |
| list_for_each_entry(cmd, &hdev->mgmt_pending, list) { |
| if (cmd->user_data != data) |
| continue; |
| if (cmd->opcode == opcode) |
| return cmd; |
| } |
| |
| return NULL; |
| } |
| |
| void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev, |
| void (*cb)(struct mgmt_pending_cmd *cmd, void *data), |
| void *data) |
| { |
| struct mgmt_pending_cmd *cmd, *tmp; |
| |
| list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) { |
| if (opcode > 0 && cmd->opcode != opcode) |
| continue; |
| |
| cb(cmd, data); |
| } |
| } |
| |
| struct mgmt_pending_cmd *mgmt_pending_new(struct sock *sk, u16 opcode, |
| struct hci_dev *hdev, |
| void *data, u16 len) |
| { |
| struct mgmt_pending_cmd *cmd; |
| |
| cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
| if (!cmd) |
| return NULL; |
| |
| cmd->opcode = opcode; |
| cmd->index = hdev->id; |
| |
| cmd->param = kmemdup(data, len, GFP_KERNEL); |
| if (!cmd->param) { |
| kfree(cmd); |
| return NULL; |
| } |
| |
| cmd->param_len = len; |
| |
| cmd->sk = sk; |
| sock_hold(sk); |
| |
| return cmd; |
| } |
| |
| struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode, |
| struct hci_dev *hdev, |
| void *data, u16 len) |
| { |
| struct mgmt_pending_cmd *cmd; |
| |
| cmd = mgmt_pending_new(sk, opcode, hdev, data, len); |
| if (!cmd) |
| return NULL; |
| |
| list_add_tail(&cmd->list, &hdev->mgmt_pending); |
| |
| return cmd; |
| } |
| |
| void mgmt_pending_free(struct mgmt_pending_cmd *cmd) |
| { |
| sock_put(cmd->sk); |
| kfree(cmd->param); |
| kfree(cmd); |
| } |
| |
| void mgmt_pending_remove(struct mgmt_pending_cmd *cmd) |
| { |
| list_del(&cmd->list); |
| mgmt_pending_free(cmd); |
| } |