cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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filter-replay.c (2530B)

      1/*
      2 * filter-replay.c
      3 *
      4 * Copyright (c) 2010-2016 Institute for System Programming
      5 *                         of the Russian Academy of Sciences.
      6 *
      7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
      8 * See the COPYING file in the top-level directory.
      9 *
     10 */
     11
     12#include "qemu/osdep.h"
     13#include "clients.h"
     14#include "qemu/error-report.h"
     15#include "qemu/iov.h"
     16#include "qemu/module.h"
     17#include "qemu/timer.h"
     18#include "qapi/visitor.h"
     19#include "net/filter.h"
     20#include "sysemu/replay.h"
     21#include "qom/object.h"
     22
     23#define TYPE_FILTER_REPLAY "filter-replay"
     24
     25OBJECT_DECLARE_SIMPLE_TYPE(NetFilterReplayState, FILTER_REPLAY)
     26
     27struct NetFilterReplayState {
     28    NetFilterState nfs;
     29    ReplayNetState *rns;
     30};
     31
     32static ssize_t filter_replay_receive_iov(NetFilterState *nf,
     33                                         NetClientState *sndr,
     34                                         unsigned flags,
     35                                         const struct iovec *iov,
     36                                         int iovcnt, NetPacketSent *sent_cb)
     37{
     38    NetFilterReplayState *nfrs = FILTER_REPLAY(nf);
     39    switch (replay_mode) {
     40    case REPLAY_MODE_RECORD:
     41        if (nf->netdev == sndr) {
     42            replay_net_packet_event(nfrs->rns, flags, iov, iovcnt);
     43            return iov_size(iov, iovcnt);
     44        }
     45        return 0;
     46    case REPLAY_MODE_PLAY:
     47        /* Drop all packets in replay mode.
     48           Packets from the log will be injected by the replay module. */
     49        return iov_size(iov, iovcnt);
     50    default:
     51        /* Pass all the packets. */
     52        return 0;
     53    }
     54}
     55
     56static void filter_replay_instance_init(Object *obj)
     57{
     58    NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
     59    nfrs->rns = replay_register_net(&nfrs->nfs);
     60}
     61
     62static void filter_replay_instance_finalize(Object *obj)
     63{
     64    NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
     65    replay_unregister_net(nfrs->rns);
     66}
     67
     68static void filter_replay_class_init(ObjectClass *oc, void *data)
     69{
     70    NetFilterClass *nfc = NETFILTER_CLASS(oc);
     71
     72    nfc->receive_iov = filter_replay_receive_iov;
     73}
     74
     75static const TypeInfo filter_replay_info = {
     76    .name = TYPE_FILTER_REPLAY,
     77    .parent = TYPE_NETFILTER,
     78    .class_init = filter_replay_class_init,
     79    .instance_init = filter_replay_instance_init,
     80    .instance_finalize = filter_replay_instance_finalize,
     81    .instance_size = sizeof(NetFilterReplayState),
     82};
     83
     84static void filter_replay_register_types(void)
     85{
     86    type_register_static(&filter_replay_info);
     87}
     88
     89type_init(filter_replay_register_types);