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a7e454542b
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
177 lines
3.9 KiB
C
177 lines
3.9 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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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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#ifndef __HCI_SOCK_H
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#define __HCI_SOCK_H
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/* Socket options */
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#define HCI_DATA_DIR 1
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#define HCI_FILTER 2
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#define HCI_TIME_STAMP 3
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/* CMSG flags */
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#define HCI_CMSG_DIR 0x0001
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#define HCI_CMSG_TSTAMP 0x0002
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struct sockaddr_hci {
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sa_family_t hci_family;
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unsigned short hci_dev;
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unsigned short hci_channel;
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};
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#define HCI_DEV_NONE 0xffff
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#define HCI_CHANNEL_RAW 0
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#define HCI_CHANNEL_USER 1
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#define HCI_CHANNEL_MONITOR 2
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#define HCI_CHANNEL_CONTROL 3
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#define HCI_CHANNEL_LOGGING 4
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struct hci_filter {
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unsigned long type_mask;
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unsigned long event_mask[2];
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__le16 opcode;
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};
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struct hci_ufilter {
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__u32 type_mask;
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__u32 event_mask[2];
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__le16 opcode;
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};
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#define HCI_FLT_TYPE_BITS 31
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#define HCI_FLT_EVENT_BITS 63
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#define HCI_FLT_OGF_BITS 63
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#define HCI_FLT_OCF_BITS 127
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/* Ioctl defines */
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#define HCIDEVUP _IOW('H', 201, int)
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#define HCIDEVDOWN _IOW('H', 202, int)
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#define HCIDEVRESET _IOW('H', 203, int)
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#define HCIDEVRESTAT _IOW('H', 204, int)
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#define HCIGETDEVLIST _IOR('H', 210, int)
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#define HCIGETDEVINFO _IOR('H', 211, int)
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#define HCIGETCONNLIST _IOR('H', 212, int)
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#define HCIGETCONNINFO _IOR('H', 213, int)
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#define HCIGETAUTHINFO _IOR('H', 215, int)
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#define HCISETRAW _IOW('H', 220, int)
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#define HCISETSCAN _IOW('H', 221, int)
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#define HCISETAUTH _IOW('H', 222, int)
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#define HCISETENCRYPT _IOW('H', 223, int)
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#define HCISETPTYPE _IOW('H', 224, int)
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#define HCISETLINKPOL _IOW('H', 225, int)
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#define HCISETLINKMODE _IOW('H', 226, int)
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#define HCISETACLMTU _IOW('H', 227, int)
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#define HCISETSCOMTU _IOW('H', 228, int)
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#define HCIBLOCKADDR _IOW('H', 230, int)
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#define HCIUNBLOCKADDR _IOW('H', 231, int)
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#define HCIINQUIRY _IOR('H', 240, int)
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/* Ioctl requests structures */
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struct hci_dev_stats {
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__u32 err_rx;
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__u32 err_tx;
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__u32 cmd_tx;
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__u32 evt_rx;
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__u32 acl_tx;
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__u32 acl_rx;
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__u32 sco_tx;
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__u32 sco_rx;
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__u32 byte_rx;
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__u32 byte_tx;
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};
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struct hci_dev_info {
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__u16 dev_id;
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char name[8];
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bdaddr_t bdaddr;
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__u32 flags;
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__u8 type;
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__u8 features[8];
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__u32 pkt_type;
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__u32 link_policy;
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__u32 link_mode;
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__u16 acl_mtu;
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__u16 acl_pkts;
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__u16 sco_mtu;
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__u16 sco_pkts;
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struct hci_dev_stats stat;
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};
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struct hci_conn_info {
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__u16 handle;
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bdaddr_t bdaddr;
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__u8 type;
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__u8 out;
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__u16 state;
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__u32 link_mode;
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};
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struct hci_dev_req {
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__u16 dev_id;
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__u32 dev_opt;
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};
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struct hci_dev_list_req {
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__u16 dev_num;
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struct hci_dev_req dev_req[]; /* hci_dev_req structures */
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};
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struct hci_conn_list_req {
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__u16 dev_id;
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__u16 conn_num;
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struct hci_conn_info conn_info[];
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};
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struct hci_conn_info_req {
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bdaddr_t bdaddr;
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__u8 type;
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struct hci_conn_info conn_info[];
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};
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struct hci_auth_info_req {
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bdaddr_t bdaddr;
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__u8 type;
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};
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struct hci_inquiry_req {
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__u16 dev_id;
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__u16 flags;
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__u8 lap[3];
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__u8 length;
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__u8 num_rsp;
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};
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#define IREQ_CACHE_FLUSH 0x0001
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#endif /* __HCI_SOCK_H */
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