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 | |