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270 lines
6.2 KiB
270 lines
6.2 KiB
/* |
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BlueZ - Bluetooth protocol stack for Linux |
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Copyright (C) 2015 Intel Corporation |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License version 2 as |
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published by the Free Software Foundation; |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
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SOFTWARE IS DISCLAIMED. |
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*/ |
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#include <asm/unaligned.h> |
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#include <net/bluetooth/bluetooth.h> |
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#include <net/bluetooth/hci_core.h> |
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#include <net/bluetooth/hci_mon.h> |
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#include <net/bluetooth/mgmt.h> |
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#include "mgmt_util.h" |
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static struct sk_buff *create_monitor_ctrl_event(__le16 index, u32 cookie, |
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u16 opcode, u16 len, void *buf) |
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{ |
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struct hci_mon_hdr *hdr; |
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struct sk_buff *skb; |
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skb = bt_skb_alloc(6 + len, GFP_ATOMIC); |
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if (!skb) |
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return NULL; |
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put_unaligned_le32(cookie, skb_put(skb, 4)); |
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put_unaligned_le16(opcode, skb_put(skb, 2)); |
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if (buf) |
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skb_put_data(skb, buf, len); |
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__net_timestamp(skb); |
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hdr = skb_push(skb, HCI_MON_HDR_SIZE); |
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hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT); |
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hdr->index = index; |
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hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); |
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return skb; |
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} |
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int mgmt_send_event(u16 event, struct hci_dev *hdev, unsigned short channel, |
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void *data, u16 data_len, int flag, struct sock *skip_sk) |
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{ |
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struct sk_buff *skb; |
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struct mgmt_hdr *hdr; |
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skb = alloc_skb(sizeof(*hdr) + data_len, GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
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hdr = skb_put(skb, sizeof(*hdr)); |
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hdr->opcode = cpu_to_le16(event); |
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if (hdev) |
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hdr->index = cpu_to_le16(hdev->id); |
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else |
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hdr->index = cpu_to_le16(MGMT_INDEX_NONE); |
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hdr->len = cpu_to_le16(data_len); |
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if (data) |
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skb_put_data(skb, data, data_len); |
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/* Time stamp */ |
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__net_timestamp(skb); |
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hci_send_to_channel(channel, skb, flag, skip_sk); |
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if (channel == HCI_CHANNEL_CONTROL) |
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hci_send_monitor_ctrl_event(hdev, event, data, data_len, |
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skb_get_ktime(skb), flag, skip_sk); |
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kfree_skb(skb); |
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return 0; |
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} |
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int mgmt_cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status) |
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{ |
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struct sk_buff *skb, *mskb; |
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struct mgmt_hdr *hdr; |
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struct mgmt_ev_cmd_status *ev; |
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int err; |
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BT_DBG("sock %p, index %u, cmd %u, status %u", sk, index, cmd, status); |
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skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
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hdr = skb_put(skb, sizeof(*hdr)); |
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hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS); |
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hdr->index = cpu_to_le16(index); |
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hdr->len = cpu_to_le16(sizeof(*ev)); |
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ev = skb_put(skb, sizeof(*ev)); |
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ev->status = status; |
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ev->opcode = cpu_to_le16(cmd); |
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mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk), |
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MGMT_EV_CMD_STATUS, sizeof(*ev), ev); |
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if (mskb) |
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skb->tstamp = mskb->tstamp; |
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else |
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__net_timestamp(skb); |
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err = sock_queue_rcv_skb(sk, skb); |
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if (err < 0) |
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kfree_skb(skb); |
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if (mskb) { |
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hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb, |
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HCI_SOCK_TRUSTED, NULL); |
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kfree_skb(mskb); |
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} |
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return err; |
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} |
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int mgmt_cmd_complete(struct sock *sk, u16 index, u16 cmd, u8 status, |
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void *rp, size_t rp_len) |
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{ |
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struct sk_buff *skb, *mskb; |
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struct mgmt_hdr *hdr; |
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struct mgmt_ev_cmd_complete *ev; |
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int err; |
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BT_DBG("sock %p", sk); |
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skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
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hdr = skb_put(skb, sizeof(*hdr)); |
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hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE); |
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hdr->index = cpu_to_le16(index); |
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hdr->len = cpu_to_le16(sizeof(*ev) + rp_len); |
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ev = skb_put(skb, sizeof(*ev) + rp_len); |
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ev->opcode = cpu_to_le16(cmd); |
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ev->status = status; |
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if (rp) |
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memcpy(ev->data, rp, rp_len); |
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mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk), |
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MGMT_EV_CMD_COMPLETE, |
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sizeof(*ev) + rp_len, ev); |
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if (mskb) |
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skb->tstamp = mskb->tstamp; |
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else |
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__net_timestamp(skb); |
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err = sock_queue_rcv_skb(sk, skb); |
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if (err < 0) |
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kfree_skb(skb); |
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if (mskb) { |
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hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb, |
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HCI_SOCK_TRUSTED, NULL); |
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kfree_skb(mskb); |
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} |
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return err; |
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} |
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struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16 opcode, |
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struct hci_dev *hdev) |
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{ |
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struct mgmt_pending_cmd *cmd; |
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list_for_each_entry(cmd, &hdev->mgmt_pending, list) { |
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if (hci_sock_get_channel(cmd->sk) != channel) |
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continue; |
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if (cmd->opcode == opcode) |
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return cmd; |
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} |
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return NULL; |
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} |
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struct mgmt_pending_cmd *mgmt_pending_find_data(unsigned short channel, |
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u16 opcode, |
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struct hci_dev *hdev, |
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const void *data) |
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{ |
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struct mgmt_pending_cmd *cmd; |
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list_for_each_entry(cmd, &hdev->mgmt_pending, list) { |
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if (cmd->user_data != data) |
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continue; |
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if (cmd->opcode == opcode) |
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return cmd; |
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} |
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return NULL; |
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} |
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void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev, |
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void (*cb)(struct mgmt_pending_cmd *cmd, void *data), |
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void *data) |
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{ |
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struct mgmt_pending_cmd *cmd, *tmp; |
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list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) { |
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if (opcode > 0 && cmd->opcode != opcode) |
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continue; |
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cb(cmd, data); |
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} |
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} |
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struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode, |
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struct hci_dev *hdev, |
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void *data, u16 len) |
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{ |
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struct mgmt_pending_cmd *cmd; |
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cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
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if (!cmd) |
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return NULL; |
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cmd->opcode = opcode; |
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cmd->index = hdev->id; |
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cmd->param = kmemdup(data, len, GFP_KERNEL); |
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if (!cmd->param) { |
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kfree(cmd); |
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return NULL; |
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} |
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cmd->param_len = len; |
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cmd->sk = sk; |
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sock_hold(sk); |
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list_add(&cmd->list, &hdev->mgmt_pending); |
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return cmd; |
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} |
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void mgmt_pending_free(struct mgmt_pending_cmd *cmd) |
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{ |
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sock_put(cmd->sk); |
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kfree(cmd->param); |
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kfree(cmd); |
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} |
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void mgmt_pending_remove(struct mgmt_pending_cmd *cmd) |
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{ |
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list_del(&cmd->list); |
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mgmt_pending_free(cmd); |
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}
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