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 typedef struct NetFilterReplayState NetFilterReplayState; 27 DECLARE_INSTANCE_CHECKER(NetFilterReplayState, FILTER_REPLAY, 28 TYPE_FILTER_REPLAY) 29 30 struct NetFilterReplayState { 31 NetFilterState nfs; 32 ReplayNetState *rns; 33 }; 34 35 static 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 59 static void filter_replay_instance_init(Object *obj) 60 { 61 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 62 nfrs->rns = replay_register_net(&nfrs->nfs); 63 } 64 65 static void filter_replay_instance_finalize(Object *obj) 66 { 67 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 68 replay_unregister_net(nfrs->rns); 69 } 70 71 static 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 78 static 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 87 static void filter_replay_register_types(void) 88 { 89 type_register_static(&filter_replay_info); 90 } 91 92 type_init(filter_replay_register_types); 93