LXR linux/include/uapi/linux/vsockmon.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI_VSOCKMON_H
   3#define _UAPI_VSOCKMON_H
   4
   5#include <linux/virtio_vsock.h>
   6
   7/*
   8 * vsockmon is the AF_VSOCK packet capture device.  Packets captured have the
   9 * following layout:
  10 *
  11 *   +-----------------------------------+
  12 *   |           vsockmon header         |
  13 *   |      (struct af_vsockmon_hdr)     |
  14 *   +-----------------------------------+
  15 *   |          transport header         |
  16 *   | (af_vsockmon_hdr->len bytes long) |
  17 *   +-----------------------------------+
  18 *   |              payload              |
  19 *   |       (until end of packet)       |
  20 *   +-----------------------------------+
  21 *
  22 * The vsockmon header is a transport-independent description of the packet.
  23 * It duplicates some of the information from the transport header so that
  24 * no transport-specific knowledge is necessary to process packets.
  25 *
  26 * The transport header is useful for low-level transport-specific packet
  27 * analysis.  Transport type is given in af_vsockmon_hdr->transport and
  28 * transport header length is given in af_vsockmon_hdr->len.
  29 *
  30 * If af_vsockmon_hdr->op is AF_VSOCK_OP_PAYLOAD then the payload follows the
  31 * transport header.  Other ops do not have a payload.
  32 */
  33
  34struct af_vsockmon_hdr {
  35        __le64 src_cid;
  36        __le64 dst_cid;
  37        __le32 src_port;
  38        __le32 dst_port;
  39        __le16 op;                      /* enum af_vsockmon_op */
  40        __le16 transport;               /* enum af_vsockmon_transport */
  41        __le16 len;                     /* Transport header length */
  42        __u8 reserved[2];
  43};
  44
  45enum af_vsockmon_op {
  46        AF_VSOCK_OP_UNKNOWN = 0,
  47        AF_VSOCK_OP_CONNECT = 1,
  48        AF_VSOCK_OP_DISCONNECT = 2,
  49        AF_VSOCK_OP_CONTROL = 3,
  50        AF_VSOCK_OP_PAYLOAD = 4,
  51};
  52
  53enum af_vsockmon_transport {
  54        AF_VSOCK_TRANSPORT_UNKNOWN = 0,
  55        AF_VSOCK_TRANSPORT_NO_INFO = 1, /* No transport information */
  56
  57        /* Transport header type: struct virtio_vsock_hdr */
  58        AF_VSOCK_TRANSPORT_VIRTIO = 2,
  59};
  60
  61#endif
  62