LXR qemu/net/filter-replay.c

   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);
  90