LXR qemu/include/net/filter.h

   1/*
   2 * Copyright (c) 2015 FUJITSU LIMITED
   3 * Author: Yang Hongyang <yanghy@cn.fujitsu.com>
   4 *
   5 * This work is licensed under the terms of the GNU GPL, version 2 or
   6 * later.  See the COPYING file in the top-level directory.
   7 */
   8
   9#ifndef QEMU_NET_FILTER_H
  10#define QEMU_NET_FILTER_H
  11
  12#include "qapi/qapi-types-net.h"
  13#include "qom/object.h"
  14#include "net/queue.h"
  15
  16#define TYPE_NETFILTER "netfilter"
  17#define NETFILTER(obj) \
  18    OBJECT_CHECK(NetFilterState, (obj), TYPE_NETFILTER)
  19#define NETFILTER_GET_CLASS(obj) \
  20    OBJECT_GET_CLASS(NetFilterClass, (obj), TYPE_NETFILTER)
  21#define NETFILTER_CLASS(klass) \
  22    OBJECT_CLASS_CHECK(NetFilterClass, (klass), TYPE_NETFILTER)
  23
  24typedef void (FilterSetup) (NetFilterState *nf, Error **errp);
  25typedef void (FilterCleanup) (NetFilterState *nf);
  26/*
  27 * Return:
  28 *   0: finished handling the packet, we should continue
  29 *   size: filter stolen this packet, we stop pass this packet further
  30 */
  31typedef ssize_t (FilterReceiveIOV)(NetFilterState *nc,
  32                                   NetClientState *sender,
  33                                   unsigned flags,
  34                                   const struct iovec *iov,
  35                                   int iovcnt,
  36                                   NetPacketSent *sent_cb);
  37
  38typedef void (FilterStatusChanged) (NetFilterState *nf, Error **errp);
  39
  40typedef void (FilterHandleEvent) (NetFilterState *nf, int event, Error **errp);
  41
  42typedef struct NetFilterClass {
  43    ObjectClass parent_class;
  44
  45    /* optional */
  46    FilterSetup *setup;
  47    FilterCleanup *cleanup;
  48    FilterStatusChanged *status_changed;
  49    FilterHandleEvent *handle_event;
  50    /* mandatory */
  51    FilterReceiveIOV *receive_iov;
  52} NetFilterClass;
  53
  54
  55struct NetFilterState {
  56    /* private */
  57    Object parent;
  58
  59    /* protected */
  60    char *netdev_id;
  61    NetClientState *netdev;
  62    NetFilterDirection direction;
  63    bool on;
  64    QTAILQ_ENTRY(NetFilterState) next;
  65};
  66
  67ssize_t qemu_netfilter_receive(NetFilterState *nf,
  68                               NetFilterDirection direction,
  69                               NetClientState *sender,
  70                               unsigned flags,
  71                               const struct iovec *iov,
  72                               int iovcnt,
  73                               NetPacketSent *sent_cb);
  74
  75/* pass the packet to the next filter */
  76ssize_t qemu_netfilter_pass_to_next(NetClientState *sender,
  77                                    unsigned flags,
  78                                    const struct iovec *iov,
  79                                    int iovcnt,
  80                                    void *opaque);
  81
  82void colo_notify_filters_event(int event, Error **errp);
  83
  84#endif /* QEMU_NET_FILTER_H */
  85