/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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#ifndef _VSOCKMON_H

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#define _VSOCKMON_H

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#include <linux/virtio_vsock.h>

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/*

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* vsockmon is the AF_VSOCK packet capture device. Packets captured have the

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* following layout:

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*

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* +-----------------------------------+

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* | vsockmon header |

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* | (struct af_vsockmon_hdr) |

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* +-----------------------------------+

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* | transport header |

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* | (af_vsockmon_hdr->len bytes long) |

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* +-----------------------------------+

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* | payload |

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* | (until end of packet) |

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* +-----------------------------------+

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*

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* The vsockmon header is a transport-independent description of the packet.

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* It duplicates some of the information from the transport header so that

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* no transport-specific knowledge is necessary to process packets.

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*

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* The transport header is useful for low-level transport-specific packet

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* analysis. Transport type is given in af_vsockmon_hdr->transport and

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* transport header length is given in af_vsockmon_hdr->len.

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*

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* If af_vsockmon_hdr->op is AF_VSOCK_OP_PAYLOAD then the payload follows the

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* transport header. Other ops do not have a payload.

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*/

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struct af_vsockmon_hdr {

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__le64 src_cid;

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__le64 dst_cid;

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__le32 src_port;

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__le32 dst_port;

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__le16 op; /* enum af_vsockmon_op */

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__le16 transport; /* enum af_vsockmon_transport */

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__le16 len; /* Transport header length */

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__u8 reserved[2];

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};

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enum af_vsockmon_op {

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AF_VSOCK_OP_UNKNOWN = 0,

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AF_VSOCK_OP_CONNECT = 1,

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AF_VSOCK_OP_DISCONNECT = 2,

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AF_VSOCK_OP_CONTROL = 3,

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AF_VSOCK_OP_PAYLOAD = 4,

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};

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enum af_vsockmon_transport {

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AF_VSOCK_TRANSPORT_UNKNOWN = 0,

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AF_VSOCK_TRANSPORT_NO_INFO = 1, /* No transport information */

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/* Transport header type: struct virtio_vsock_hdr */

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AF_VSOCK_TRANSPORT_VIRTIO = 2,

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};

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#endif

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