LXR qemu/net/tap-linux.h

   1/*
   2 *  Universal TUN/TAP device driver.
   3 *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
   4 *
   5 *  This program is free software; you can redistribute it and/or modify
   6 *  it under the terms of the GNU General Public License as published by
   7 *  the Free Software Foundation; either version 2 of the License, or
   8 *  (at your option) any later version.
   9 *
  10 *  This program is distributed in the hope that it will be useful,
  11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 *  GNU General Public License for more details.
  14 */
  15
  16#ifndef QEMU_TAP_H
  17#define QEMU_TAP_H
  18
  19#include <stdint.h>
  20#ifdef __linux__
  21
  22#include <linux/ioctl.h>
  23
  24/* Ioctl defines */
  25#define TUNSETIFF     _IOW('T', 202, int)
  26#define TUNGETFEATURES _IOR('T', 207, unsigned int)
  27#define TUNSETOFFLOAD  _IOW('T', 208, unsigned int)
  28#define TUNGETIFF      _IOR('T', 210, unsigned int)
  29#define TUNSETSNDBUF   _IOW('T', 212, int)
  30#define TUNGETVNETHDRSZ _IOR('T', 215, int)
  31#define TUNSETVNETHDRSZ _IOW('T', 216, int)
  32
  33#endif
  34
  35/* TUNSETIFF ifr flags */
  36#define IFF_TAP         0x0002
  37#define IFF_NO_PI       0x1000
  38#define IFF_VNET_HDR    0x4000
  39
  40/* Features for GSO (TUNSETOFFLOAD). */
  41#define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
  42#define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
  43#define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
  44#define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
  45#define TUN_F_UFO       0x10    /* I can handle UFO packets */
  46
  47struct virtio_net_hdr
  48{
  49    uint8_t flags;
  50    uint8_t gso_type;
  51    uint16_t hdr_len;
  52    uint16_t gso_size;
  53    uint16_t csum_start;
  54    uint16_t csum_offset;
  55};
  56
  57struct virtio_net_hdr_mrg_rxbuf
  58{
  59    struct virtio_net_hdr hdr;
  60    uint16_t num_buffers;   /* Number of merged rx buffers */
  61};
  62
  63#endif /* QEMU_TAP_H */
  64