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 #include <linux/ioctl.h>
  21
  22 /* Ioctl defines */
  23 #define TUNSETIFF     _IOW('T', 202, int)
  24 #define TUNGETFEATURES _IOR('T', 207, unsigned int)
  25 #define TUNSETOFFLOAD  _IOW('T', 208, unsigned int)
  26 #define TUNGETIFF      _IOR('T', 210, unsigned int)
  27 #define TUNSETSNDBUF   _IOW('T', 212, int)
  28
  29 /* TUNSETIFF ifr flags */
  30 #define IFF_TAP         0x0002
  31 #define IFF_NO_PI       0x1000
  32 #define IFF_VNET_HDR    0x4000
  33
  34 /* Features for GSO (TUNSETOFFLOAD). */
  35 #define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
  36 #define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
  37 #define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
  38 #define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
  39
  40 struct virtio_net_hdr
  41 {
  42     uint8_t flags;
  43     uint8_t gso_type;
  44     uint16_t hdr_len;
  45     uint16_t gso_size;
  46     uint16_t csum_start;
  47     uint16_t csum_offset;
  48 };
  49
  50 #endif /* QEMU_TAP_H */