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/*
* Copyright (c) 2015 FUJITSU LIMITED
* Author: Yang Hongyang <yanghy@cn.fujitsu.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#ifndef QEMU_NET_FILTER_H
#define QEMU_NET_FILTER_H
#include "qom/object.h"
#include "qemu-common.h"
#include "net/queue.h"
#define TYPE_NETFILTER "netfilter"
#define NETFILTER(obj) \
OBJECT_CHECK(NetFilterState, (obj), TYPE_NETFILTER)
#define NETFILTER_GET_CLASS(obj) \
OBJECT_GET_CLASS(NetFilterClass, (obj), TYPE_NETFILTER)
#define NETFILTER_CLASS(klass) \
OBJECT_CLASS_CHECK(NetFilterClass, (klass), TYPE_NETFILTER)
typedef void (FilterSetup) (NetFilterState *nf, Error **errp);
typedef void (FilterCleanup) (NetFilterState *nf);
/*
* Return:
* 0: finished handling the packet, we should continue
* size: filter stolen this packet, we stop pass this packet further
*/
typedef ssize_t (FilterReceiveIOV)(NetFilterState *nc,
NetClientState *sender,
unsigned flags,
const struct iovec *iov,
int iovcnt,
NetPacketSent *sent_cb);
typedef void (FilterStatusChanged) (NetFilterState *nf, Error **errp);
typedef struct NetFilterClass {
ObjectClass parent_class;
/* optional */
FilterSetup *setup;
FilterCleanup *cleanup;
FilterStatusChanged *status_changed;
/* mandatory */
FilterReceiveIOV *receive_iov;
} NetFilterClass;
struct NetFilterState {
/* private */
Object parent;
/* protected */
char *netdev_id;
NetClientState *netdev;
NetFilterDirection direction;
bool on;
QTAILQ_ENTRY(NetFilterState) next;
};
ssize_t qemu_netfilter_receive(NetFilterState *nf,
NetFilterDirection direction,
NetClientState *sender,
unsigned flags,
const struct iovec *iov,
int iovcnt,
NetPacketSent *sent_cb);
/* pass the packet to the next filter */
ssize_t qemu_netfilter_pass_to_next(NetClientState *sender,
unsigned flags,
const struct iovec *iov,
int iovcnt,
void *opaque);
#endif /* QEMU_NET_FILTER_H */
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