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 "qapi/error.h"
  15#include "qemu-common.h"
  16#include "qemu/error-report.h"
  17#include "qemu/iov.h"
  18#include "qemu/log.h"
  19#include "qemu/timer.h"
  20#include "qapi/visitor.h"
  21#include "net/filter.h"
  22#include "sysemu/replay.h"
  23
  24#define TYPE_FILTER_REPLAY "filter-replay"
  25
  26#define FILTER_REPLAY(obj) \
  27    OBJECT_CHECK(NetFilterReplayState, (obj), TYPE_FILTER_REPLAY)
  28
  29struct NetFilterReplayState {
  30    NetFilterState nfs;
  31    ReplayNetState *rns;
  32};
  33typedef struct NetFilterReplayState NetFilterReplayState;
  34
  35static ssize_t filter_replay_receive_iov(NetFilterState *nf,
  36                                         NetClientState *sndr,
  37                                         unsigned flags,
  38                                         const struct iovec *iov,
  39                                         int iovcnt, NetPacketSent *sent_cb)
  40{
  41    NetFilterReplayState *nfrs = FILTER_REPLAY(nf);
  42    switch (replay_mode) {
  43    case REPLAY_MODE_RECORD:
  44        if (nf->netdev == sndr) {
  45            replay_net_packet_event(nfrs->rns, flags, iov, iovcnt);
  46            return iov_size(iov, iovcnt);
  47        }
  48        return 0;
  49    case REPLAY_MODE_PLAY:
  50        /* Drop all packets in replay mode.
  51           Packets from the log will be injected by the replay module. */
  52        return iov_size(iov, iovcnt);
  53    default:
  54        /* Pass all the packets. */
  55        return 0;
  56    }
  57}
  58
  59static void filter_replay_instance_init(Object *obj)
  60{
  61    NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
  62    nfrs->rns = replay_register_net(&nfrs->nfs);
  63}
  64
  65static void filter_replay_instance_finalize(Object *obj)
  66{
  67    NetFilterReplayState *nfrs = FILTER_REPLAY(obj);
  68    replay_unregister_net(nfrs->rns);
  69}
  70
  71static void filter_replay_class_init(ObjectClass *oc, void *data)
  72{
  73    NetFilterClass *nfc = NETFILTER_CLASS(oc);
  74
  75    nfc->receive_iov = filter_replay_receive_iov;
  76}
  77
  78static const TypeInfo filter_replay_info = {
  79    .name = TYPE_FILTER_REPLAY,
  80    .parent = TYPE_NETFILTER,
  81    .class_init = filter_replay_class_init,
  82    .instance_init = filter_replay_instance_init,
  83    .instance_finalize = filter_replay_instance_finalize,
  84    .instance_size = sizeof(NetFilterReplayState),
  85};
  86
  87static void filter_replay_register_types(void)
  88{
  89    type_register_static(&filter_replay_info);
  90}
  91
  92type_init(filter_replay_register_types);
  93