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/*
* filter-replay.c
*
* Copyright (c) 2010-2016 Institute for System Programming
* of the Russian Academy of Sciences.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "clients.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "qemu/error-report.h"
#include "qemu/iov.h"
#include "qemu/log.h"
#include "qemu/timer.h"
#include "qapi/visitor.h"
#include "net/filter.h"
#include "sysemu/replay.h"
#define TYPE_FILTER_REPLAY "filter-replay"
#define FILTER_REPLAY(obj) \
OBJECT_CHECK(NetFilterReplayState, (obj), TYPE_FILTER_REPLAY)
struct NetFilterReplayState {
NetFilterState nfs;
ReplayNetState *rns;
};
typedef struct NetFilterReplayState NetFilterReplayState;
static ssize_t filter_replay_receive_iov(NetFilterState *nf,
NetClientState *sndr,
unsigned flags,
const struct iovec *iov,
int iovcnt, NetPacketSent *sent_cb)
{
NetFilterReplayState *nfrs = FILTER_REPLAY(nf);
switch (replay_mode) {
case REPLAY_MODE_RECORD:
if (nf->netdev == sndr) {
replay_net_packet_event(nfrs->rns, flags, iov, iovcnt);
return iov_size(iov, iovcnt);
}
return 0;
case REPLAY_MODE_PLAY:
/* Drop all packets in replay mode.
Packets from the log will be injected by the replay module. */
return iov_size(iov, iovcnt);
default:
/* Pass all the packets. */
return 0;
}
}
static void filter_replay_instance_init(Object *obj)
{
NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
nfrs->rns = replay_register_net(&nfrs->nfs);
}
static void filter_replay_instance_finalize(Object *obj)
{
NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
replay_unregister_net(nfrs->rns);
}
static void filter_replay_class_init(ObjectClass *oc, void *data)
{
NetFilterClass *nfc = NETFILTER_CLASS(oc);
nfc->receive_iov = filter_replay_receive_iov;
}
static const TypeInfo filter_replay_info = {
.name = TYPE_FILTER_REPLAY,
.parent = TYPE_NETFILTER,
.class_init = filter_replay_class_init,
.instance_init = filter_replay_instance_init,
.instance_finalize = filter_replay_instance_finalize,
.instance_size = sizeof(NetFilterReplayState),
};
static void filter_replay_register_types(void)
{
type_register_static(&filter_replay_info);
}
type_init(filter_replay_register_types);
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