4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2009 Red Hat, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #ifndef QEMU_NET_TAP_H
27 #define QEMU_NET_TAP_H
29 #include "qemu-common.h"
30 #include "qapi-types.h"
32 bool tap_has_ufo(NetClientState
*nc
);
33 bool tap_has_vnet_hdr(NetClientState
*nc
);
34 bool tap_has_vnet_hdr_len(NetClientState
*nc
, int len
);
35 void tap_using_vnet_hdr(NetClientState
*nc
, bool using_vnet_hdr
);
36 void tap_set_offload(NetClientState
*nc
, int csum
, int tso4
, int tso6
, int ecn
, int ufo
);
37 void tap_set_vnet_hdr_len(NetClientState
*nc
, int len
);
38 int tap_enable(NetClientState
*nc
);
39 int tap_disable(NetClientState
*nc
);
41 int tap_get_fd(NetClientState
*nc
);
44 struct vhost_net
*tap_get_vhost_net(NetClientState
*nc
);
48 #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
49 #define VIRTIO_NET_HDR_F_DATA_VALID 2 // Csum is valid
51 #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
52 #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
53 #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
54 #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
55 #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
63 struct virtio_net_hdr_mrg_rxbuf
65 struct virtio_net_hdr hdr
;
66 uint16_t num_buffers
; /* Number of merged rx buffers */
69 #endif /* QEMU_NET_TAP_H */