summaryrefslogtreecommitdiffstats
path: root/include/uapi/linux/vsockmon.h
blob: 4a03b893a957ccea7e18a4c855111b1c35d28e5b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_VSOCKMON_H
#define _UAPI_VSOCKMON_H

#include <linux/virtio_vsock.h>

/*
 * vsockmon is the AF_VSOCK packet capture device.  Packets captured have the
 * following layout:
 *
 *   +-----------------------------------+
 *   |           vsockmon header         |
 *   |      (struct af_vsockmon_hdr)     |
 *   +-----------------------------------+
 *   |          transport header         |
 *   | (af_vsockmon_hdr->len bytes long) |
 *   +-----------------------------------+
 *   |              payload              |
 *   |       (until end of packet)       |
 *   +-----------------------------------+
 *
 * The vsockmon header is a transport-independent description of the packet.
 * It duplicates some of the information from the transport header so that
 * no transport-specific knowledge is necessary to process packets.
 *
 * The transport header is useful for low-level transport-specific packet
 * analysis.  Transport type is given in af_vsockmon_hdr->transport and
 * transport header length is given in af_vsockmon_hdr->len.
 *
 * If af_vsockmon_hdr->op is AF_VSOCK_OP_PAYLOAD then the payload follows the
 * transport header.  Other ops do not have a payload.
 */

struct af_vsockmon_hdr {
	__le64 src_cid;
	__le64 dst_cid;
	__le32 src_port;
	__le32 dst_port;
	__le16 op;			/* enum af_vsockmon_op */
	__le16 transport;		/* enum af_vsockmon_transport */
	__le16 len;			/* Transport header length */
	__u8 reserved[2];
};

enum af_vsockmon_op {
	AF_VSOCK_OP_UNKNOWN = 0,
	AF_VSOCK_OP_CONNECT = 1,
	AF_VSOCK_OP_DISCONNECT = 2,
	AF_VSOCK_OP_CONTROL = 3,
	AF_VSOCK_OP_PAYLOAD = 4,
};

enum af_vsockmon_transport {
	AF_VSOCK_TRANSPORT_UNKNOWN = 0,
	AF_VSOCK_TRANSPORT_NO_INFO = 1,	/* No transport information */

	/* Transport header type: struct virtio_vsock_hdr */
	AF_VSOCK_TRANSPORT_VIRTIO = 2,
};

#endif
OpenPOWER on IntegriCloud