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62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
4 years ago
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/* 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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