445d892f43
Add APIs to control host header length. First user will be vhost-net. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/*
|
|
* Universal TUN/TAP device driver.
|
|
* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef QEMU_TAP_H
|
|
#define QEMU_TAP_H
|
|
|
|
#include <stdint.h>
|
|
#ifdef __linux__
|
|
|
|
#include <linux/ioctl.h>
|
|
|
|
/* Ioctl defines */
|
|
#define TUNSETIFF _IOW('T', 202, int)
|
|
#define TUNGETFEATURES _IOR('T', 207, unsigned int)
|
|
#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
|
|
#define TUNGETIFF _IOR('T', 210, unsigned int)
|
|
#define TUNSETSNDBUF _IOW('T', 212, int)
|
|
#define TUNGETVNETHDRSZ _IOR('T', 215, int)
|
|
#define TUNSETVNETHDRSZ _IOW('T', 216, int)
|
|
|
|
#endif
|
|
|
|
/* TUNSETIFF ifr flags */
|
|
#define IFF_TAP 0x0002
|
|
#define IFF_NO_PI 0x1000
|
|
#define IFF_VNET_HDR 0x4000
|
|
|
|
/* Features for GSO (TUNSETOFFLOAD). */
|
|
#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
|
|
#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
|
|
#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
|
|
#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
|
|
#define TUN_F_UFO 0x10 /* I can handle UFO packets */
|
|
|
|
struct virtio_net_hdr
|
|
{
|
|
uint8_t flags;
|
|
uint8_t gso_type;
|
|
uint16_t hdr_len;
|
|
uint16_t gso_size;
|
|
uint16_t csum_start;
|
|
uint16_t csum_offset;
|
|
};
|
|
|
|
struct virtio_net_hdr_mrg_rxbuf
|
|
{
|
|
struct virtio_net_hdr hdr;
|
|
uint16_t num_buffers; /* Number of merged rx buffers */
|
|
};
|
|
|
|
#endif /* QEMU_TAP_H */
|