mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
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>
174 lines
3.6 KiB
C
174 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
BNEP protocol definition for Linux Bluetooth stack (BlueZ).
|
|
Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
|
|
|
|
*/
|
|
|
|
#ifndef _BNEP_H
|
|
#define _BNEP_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/crc32.h>
|
|
#include <net/bluetooth/bluetooth.h>
|
|
|
|
/* Limits */
|
|
#define BNEP_MAX_PROTO_FILTERS 5
|
|
#define BNEP_MAX_MULTICAST_FILTERS 20
|
|
|
|
/* UUIDs */
|
|
#define BNEP_BASE_UUID 0x0000000000001000800000805F9B34FB
|
|
#define BNEP_UUID16 0x02
|
|
#define BNEP_UUID32 0x04
|
|
#define BNEP_UUID128 0x16
|
|
|
|
#define BNEP_SVC_PANU 0x1115
|
|
#define BNEP_SVC_NAP 0x1116
|
|
#define BNEP_SVC_GN 0x1117
|
|
|
|
/* Packet types */
|
|
#define BNEP_GENERAL 0x00
|
|
#define BNEP_CONTROL 0x01
|
|
#define BNEP_COMPRESSED 0x02
|
|
#define BNEP_COMPRESSED_SRC_ONLY 0x03
|
|
#define BNEP_COMPRESSED_DST_ONLY 0x04
|
|
|
|
/* Control types */
|
|
#define BNEP_CMD_NOT_UNDERSTOOD 0x00
|
|
#define BNEP_SETUP_CONN_REQ 0x01
|
|
#define BNEP_SETUP_CONN_RSP 0x02
|
|
#define BNEP_FILTER_NET_TYPE_SET 0x03
|
|
#define BNEP_FILTER_NET_TYPE_RSP 0x04
|
|
#define BNEP_FILTER_MULTI_ADDR_SET 0x05
|
|
#define BNEP_FILTER_MULTI_ADDR_RSP 0x06
|
|
|
|
/* Extension types */
|
|
#define BNEP_EXT_CONTROL 0x00
|
|
|
|
/* Response messages */
|
|
#define BNEP_SUCCESS 0x00
|
|
|
|
#define BNEP_CONN_INVALID_DST 0x01
|
|
#define BNEP_CONN_INVALID_SRC 0x02
|
|
#define BNEP_CONN_INVALID_SVC 0x03
|
|
#define BNEP_CONN_NOT_ALLOWED 0x04
|
|
|
|
#define BNEP_FILTER_UNSUPPORTED_REQ 0x01
|
|
#define BNEP_FILTER_INVALID_RANGE 0x02
|
|
#define BNEP_FILTER_INVALID_MCADDR 0x02
|
|
#define BNEP_FILTER_LIMIT_REACHED 0x03
|
|
#define BNEP_FILTER_DENIED_SECURITY 0x04
|
|
|
|
/* L2CAP settings */
|
|
#define BNEP_MTU 1691
|
|
#define BNEP_PSM 0x0f
|
|
#define BNEP_FLUSH_TO 0xffff
|
|
#define BNEP_CONNECT_TO 15
|
|
#define BNEP_FILTER_TO 15
|
|
|
|
/* Headers */
|
|
#define BNEP_TYPE_MASK 0x7f
|
|
#define BNEP_EXT_HEADER 0x80
|
|
|
|
struct bnep_setup_conn_req {
|
|
__u8 type;
|
|
__u8 ctrl;
|
|
__u8 uuid_size;
|
|
__u8 service[];
|
|
} __packed;
|
|
|
|
struct bnep_set_filter_req {
|
|
__u8 type;
|
|
__u8 ctrl;
|
|
__be16 len;
|
|
__u8 list[];
|
|
} __packed;
|
|
|
|
struct bnep_control_rsp {
|
|
__u8 type;
|
|
__u8 ctrl;
|
|
__be16 resp;
|
|
} __packed;
|
|
|
|
struct bnep_ext_hdr {
|
|
__u8 type;
|
|
__u8 len;
|
|
__u8 data[];
|
|
} __packed;
|
|
|
|
/* BNEP ioctl defines */
|
|
#define BNEPCONNADD _IOW('B', 200, int)
|
|
#define BNEPCONNDEL _IOW('B', 201, int)
|
|
#define BNEPGETCONNLIST _IOR('B', 210, int)
|
|
#define BNEPGETCONNINFO _IOR('B', 211, int)
|
|
#define BNEPGETSUPPFEAT _IOR('B', 212, int)
|
|
|
|
#define BNEP_SETUP_RESPONSE 0
|
|
#define BNEP_SETUP_RSP_SENT 10
|
|
|
|
struct bnep_connadd_req {
|
|
int sock; /* Connected socket */
|
|
__u32 flags;
|
|
__u16 role;
|
|
char device[16]; /* Name of the Ethernet device */
|
|
};
|
|
|
|
struct bnep_conndel_req {
|
|
__u32 flags;
|
|
__u8 dst[ETH_ALEN];
|
|
};
|
|
|
|
struct bnep_conninfo {
|
|
__u32 flags;
|
|
__u16 role;
|
|
__u16 state;
|
|
__u8 dst[ETH_ALEN];
|
|
char device[16];
|
|
};
|
|
|
|
struct bnep_connlist_req {
|
|
__u32 cnum;
|
|
struct bnep_conninfo __user *ci;
|
|
};
|
|
|
|
struct bnep_proto_filter {
|
|
__u16 start;
|
|
__u16 end;
|
|
};
|
|
|
|
int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock);
|
|
int bnep_del_connection(struct bnep_conndel_req *req);
|
|
int bnep_get_connlist(struct bnep_connlist_req *req);
|
|
int bnep_get_conninfo(struct bnep_conninfo *ci);
|
|
|
|
/* BNEP sessions */
|
|
struct bnep_session {
|
|
struct list_head list;
|
|
|
|
unsigned int role;
|
|
unsigned long state;
|
|
unsigned long flags;
|
|
atomic_t terminate;
|
|
struct task_struct *task;
|
|
|
|
struct ethhdr eh;
|
|
struct msghdr msg;
|
|
|
|
struct bnep_proto_filter proto_filter[BNEP_MAX_PROTO_FILTERS];
|
|
unsigned long long mc_filter;
|
|
|
|
struct socket *sock;
|
|
struct net_device *dev;
|
|
};
|
|
|
|
void bnep_net_setup(struct net_device *dev);
|
|
int bnep_sock_init(void);
|
|
void bnep_sock_cleanup(void);
|
|
|
|
static inline int bnep_mc_hash(__u8 *addr)
|
|
{
|
|
return crc32_be(~0, addr, ETH_ALEN) >> 26;
|
|
}
|
|
|
|
#endif
|