qdev: remove baked in notion of aliases (v2)
[qemu.git] / 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
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 */