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 25 OBJECT_DECLARE_SIMPLE_TYPE(NetFilterReplayState, FILTER_REPLAY) 26 27 struct NetFilterReplayState { 28 NetFilterState nfs; 29 ReplayNetState *rns; 30 }; 31 32 static 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 56 static void filter_replay_instance_init(Object *obj) 57 { 58 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 59 nfrs->rns = replay_register_net(&nfrs->nfs); 60 } 61 62 static void filter_replay_instance_finalize(Object *obj) 63 { 64 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 65 replay_unregister_net(nfrs->rns); 66 } 67 68 static 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 75 static 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 84 static void filter_replay_register_types(void) 85 { 86 type_register_static(&filter_replay_info); 87 } 88 89 type_init(filter_replay_register_types); 90