include/linux/virtio_net.h

#ifndef _LINUX_VIRTIO_NET_H
#define _LINUX_VIRTIO_NET_H
/* This header is BSD licensed so anyone can use the definitions to implement
 * compatible drivers/servers.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of IBM nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE. */
#include <linux/types.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
#include <linux/if_ether.h>

#define VIRTIO_NET_F_CSUM	0	
#define VIRTIO_NET_F_GUEST_CSUM	1	
#define VIRTIO_NET_F_MAC	5	
#define VIRTIO_NET_F_GSO	6	
#define VIRTIO_NET_F_GUEST_TSO4	7	
#define VIRTIO_NET_F_GUEST_TSO6	8	
#define VIRTIO_NET_F_GUEST_ECN	9	
#define VIRTIO_NET_F_GUEST_UFO	10	
#define VIRTIO_NET_F_HOST_TSO4	11	
#define VIRTIO_NET_F_HOST_TSO6	12	
#define VIRTIO_NET_F_HOST_ECN	13	
#define VIRTIO_NET_F_HOST_UFO	14	
#define VIRTIO_NET_F_MRG_RXBUF	15	
#define VIRTIO_NET_F_STATUS	16	
#define VIRTIO_NET_F_CTRL_VQ	17	
#define VIRTIO_NET_F_CTRL_RX	18	
#define VIRTIO_NET_F_CTRL_VLAN	19	
#define VIRTIO_NET_F_CTRL_RX_EXTRA 20	

#define VIRTIO_NET_S_LINK_UP	1	

struct virtio_net_config {
	
	__u8 mac[6];
	
	__u16 status;
} __attribute__((packed));

struct virtio_net_hdr {
#define VIRTIO_NET_HDR_F_NEEDS_CSUM	1	
#define VIRTIO_NET_HDR_F_DATA_VALID	2	
	__u8 flags;
#define VIRTIO_NET_HDR_GSO_NONE		0	
#define VIRTIO_NET_HDR_GSO_TCPV4	1	
#define VIRTIO_NET_HDR_GSO_UDP		3	
#define VIRTIO_NET_HDR_GSO_TCPV6	4	
#define VIRTIO_NET_HDR_GSO_ECN		0x80	
	__u8 gso_type;
	__u16 hdr_len;		
	__u16 gso_size;		
	__u16 csum_start;	
	__u16 csum_offset;	
};

struct virtio_net_hdr_mrg_rxbuf {
	struct virtio_net_hdr hdr;
	__u16 num_buffers;	
};

struct virtio_net_ctrl_hdr {
	__u8 class;
	__u8 cmd;
} __attribute__((packed));

typedef __u8 virtio_net_ctrl_ack;

#define VIRTIO_NET_OK     0
#define VIRTIO_NET_ERR    1

#define VIRTIO_NET_CTRL_RX    0
 #define VIRTIO_NET_CTRL_RX_PROMISC      0
 #define VIRTIO_NET_CTRL_RX_ALLMULTI     1
 #define VIRTIO_NET_CTRL_RX_ALLUNI       2
 #define VIRTIO_NET_CTRL_RX_NOMULTI      3
 #define VIRTIO_NET_CTRL_RX_NOUNI        4
 #define VIRTIO_NET_CTRL_RX_NOBCAST      5

struct virtio_net_ctrl_mac {
	__u32 entries;
	__u8 macs[][ETH_ALEN];
} __attribute__((packed));

#define VIRTIO_NET_CTRL_MAC    1
 #define VIRTIO_NET_CTRL_MAC_TABLE_SET        0

#define VIRTIO_NET_CTRL_VLAN       2
 #define VIRTIO_NET_CTRL_VLAN_ADD             0
 #define VIRTIO_NET_CTRL_VLAN_DEL             1

#endif