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 28 struct NetFilterReplayState { 29 NetFilterState nfs; 30 ReplayNetState *rns; 31 }; 32 typedef struct NetFilterReplayState NetFilterReplayState; 33 34 static 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 58 static void filter_replay_instance_init(Object *obj) 59 { 60 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 61 nfrs->rns = replay_register_net(&nfrs->nfs); 62 } 63 64 static void filter_replay_instance_finalize(Object *obj) 65 { 66 NetFilterReplayState *nfrs = FILTER_REPLAY(obj); 67 replay_unregister_net(nfrs->rns); 68 } 69 70 static 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 77 static 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 86 static void filter_replay_register_types(void) 87 { 88 type_register_static(&filter_replay_info); 89 } 90 91 type_init(filter_replay_register_types); 92