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