mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 15:04:27 +08:00
d58ff35122
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.
Make these functions return void * and remove all the casts across
the tree, adding a (u8 *) cast only where the unsigned char pointer
was used directly, all done with the following spatch:
@@
expression SKB, LEN;
typedef u8;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- *(fn(SKB, LEN))
+ *(u8 *)fn(SKB, LEN)
@@
expression E, SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
type T;
@@
- E = ((T *)(fn(SKB, LEN)))
+ E = fn(SKB, LEN)
@@
expression SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- fn(SKB, LEN)[0]
+ *(u8 *)fn(SKB, LEN)
Note that the last part there converts from push(...)[0] to the
more idiomatic *(u8 *)push(...).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
271 lines
6.2 KiB
C
271 lines
6.2 KiB
C
/*
|
|
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;
|
|
}
|
|
|
|
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;
|
|
struct mgmt_hdr *hdr;
|
|
|
|
skb = alloc_skb(sizeof(*hdr) + data_len, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
hdr = skb_put(skb, sizeof(*hdr));
|
|
hdr->opcode = cpu_to_le16(event);
|
|
if (hdev)
|
|
hdr->index = cpu_to_le16(hdev->id);
|
|
else
|
|
hdr->index = cpu_to_le16(MGMT_INDEX_NONE);
|
|
hdr->len = cpu_to_le16(data_len);
|
|
|
|
if (data)
|
|
skb_put_data(skb, data, data_len);
|
|
|
|
/* Time stamp */
|
|
__net_timestamp(skb);
|
|
|
|
hci_send_to_channel(channel, skb, flag, skip_sk);
|
|
|
|
if (channel == HCI_CHANNEL_CONTROL)
|
|
hci_send_monitor_ctrl_event(hdev, event, data, data_len,
|
|
skb_get_ktime(skb), flag, skip_sk);
|
|
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
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_add(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);
|
|
|
|
list_add(&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);
|
|
}
|