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 26 OBJECT_DECLARE_SIMPLE_TYPE(NetFilterReplayState, FILTER_REPLAY) 27 28 struct NetFilterReplayState { 29 NetFilterState nfs; 30 ReplayNetState *rns; 31 }; 32 33 static 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 57 static void filter_replay_instance_init(Object *obj) 58 { 59 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 60 nfrs->rns = replay_register_net(&nfrs->nfs); 61 } 62 63 static void filter_replay_instance_finalize(Object *obj) 64 { 65 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 66 replay_unregister_net(nfrs->rns); 67 } 68 69 static 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 76 static 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 85 static void filter_replay_register_types(void) 86 { 87 type_register_static(&filter_replay_info); 88 } 89 90 type_init(filter_replay_register_types); 91