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 31 #endif 32 33 /* TUNSETIFF ifr flags */ 34 #define IFF_TAP 0x0002 35 #define IFF_NO_PI 0x1000 36 #define IFF_VNET_HDR 0x4000 37 38 /* Features for GSO (TUNSETOFFLOAD). */ 39 #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ 40 #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ 41 #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ 42 #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ 43 #define TUN_F_UFO 0x10 /* I can handle UFO packets */ 44 45 struct virtio_net_hdr 46 { 47 uint8_t flags; 48 uint8_t gso_type; 49 uint16_t hdr_len; 50 uint16_t gso_size; 51 uint16_t csum_start; 52 uint16_t csum_offset; 53 }; 54 55 #endif /* QEMU_TAP_H */ 56