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/log.h"
  17#include "qemu/module.h"
  18#include "qemu/timer.h"
  19#include "qapi/visitor.h"
  20#include "net/filter.h"
  21#include "sysemu/replay.h"
  22#include "qom/object.h"
  23
  24#define TYPE_FILTER_REPLAY "filter-replay"
  25
  26OBJECT_DECLARE_SIMPLE_TYPE(NetFilterReplayState, FILTER_REPLAY)
  27
  28struct NetFilterReplayState {
  29    NetFilterState nfs;
  30    ReplayNetState *rns;
  31};
  32
  33static ssize_t filter_replay_receive_iov(NetFilterState *nf,
  34                                         NetClientState *sndr,
  35                                         unsigned flags,
  36                                         const struct iovec *iov,
  37                                         int iovcnt, NetPacketSent *sent_cb)
  38{
  39    NetFilterReplayState *nfrs = FILTER_REPLAY(nf);
  40    switch (replay_mode) {
  41    case REPLAY_MODE_RECORD:
  42        if (nf->netdev == sndr) {
  43            replay_net_packet_event(nfrs->rns, flags, iov, iovcnt);
  44            return iov_size(iov, iovcnt);
  45        }
  46        return 0;
  47    case REPLAY_MODE_PLAY:
  48        /* Drop all packets in replay mode.
  49           Packets from the log will be injected by the replay module. */
  50        return iov_size(iov, iovcnt);
  51    default:
  52        /* Pass all the packets. */
  53        return 0;
  54    }
  55}
  56
  57static void filter_replay_instance_init(Object *obj)
  58{
  59    NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
  60    nfrs->rns = replay_register_net(&nfrs->nfs);
  61}
  62
  63static void filter_replay_instance_finalize(Object *obj)
  64{
  65    NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
  66    replay_unregister_net(nfrs->rns);
  67}
  68
  69static void filter_replay_class_init(ObjectClass *oc, void *data)
  70{
  71    NetFilterClass *nfc = NETFILTER_CLASS(oc);
  72
  73    nfc->receive_iov = filter_replay_receive_iov;
  74}
  75
  76static const TypeInfo filter_replay_info = {
  77    .name = TYPE_FILTER_REPLAY,
  78    .parent = TYPE_NETFILTER,
  79    .class_init = filter_replay_class_init,
  80    .instance_init = filter_replay_instance_init,
  81    .instance_finalize = filter_replay_instance_finalize,
  82    .instance_size = sizeof(NetFilterReplayState),
  83};
  84
  85static void filter_replay_register_types(void)
  86{
  87    type_register_static(&filter_replay_info);
  88}
  89
  90type_init(filter_replay_register_types);
  91