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 47 struct 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 57 struct 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