Quelle vsockmon.h Sprache: C

/* 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

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