Pavel Dovgalyuk | 646c547 | 2016-09-26 11:08:21 +0300 | [diff] [blame] | 1 | /* |
| 2 | * replay-net.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 "qemu/error-report.h" |
| 14 | #include "sysemu/replay.h" |
| 15 | #include "replay-internal.h" |
| 16 | #include "sysemu/sysemu.h" |
| 17 | #include "net/net.h" |
| 18 | #include "net/filter.h" |
| 19 | #include "qemu/iov.h" |
| 20 | |
| 21 | struct ReplayNetState { |
| 22 | NetFilterState *nfs; |
| 23 | int id; |
| 24 | }; |
| 25 | |
| 26 | typedef struct NetEvent { |
| 27 | uint8_t id; |
| 28 | uint32_t flags; |
| 29 | uint8_t *data; |
| 30 | size_t size; |
| 31 | } NetEvent; |
| 32 | |
| 33 | static NetFilterState **network_filters; |
| 34 | static int network_filters_count; |
| 35 | |
| 36 | ReplayNetState *replay_register_net(NetFilterState *nfs) |
| 37 | { |
| 38 | ReplayNetState *rns = g_new0(ReplayNetState, 1); |
| 39 | rns->nfs = nfs; |
| 40 | rns->id = network_filters_count++; |
| 41 | network_filters = g_realloc(network_filters, |
| 42 | network_filters_count |
| 43 | * sizeof(*network_filters)); |
| 44 | network_filters[network_filters_count - 1] = nfs; |
| 45 | return rns; |
| 46 | } |
| 47 | |
| 48 | void replay_unregister_net(ReplayNetState *rns) |
| 49 | { |
| 50 | network_filters[rns->id] = NULL; |
| 51 | g_free(rns); |
| 52 | } |
| 53 | |
| 54 | void replay_net_packet_event(ReplayNetState *rns, unsigned flags, |
| 55 | const struct iovec *iov, int iovcnt) |
| 56 | { |
| 57 | NetEvent *event = g_new(NetEvent, 1); |
| 58 | event->flags = flags; |
| 59 | event->data = g_malloc(iov_size(iov, iovcnt)); |
| 60 | event->size = iov_size(iov, iovcnt); |
| 61 | event->id = rns->id; |
| 62 | iov_to_buf(iov, iovcnt, 0, event->data, event->size); |
| 63 | |
| 64 | replay_add_event(REPLAY_ASYNC_EVENT_NET, event, NULL, 0); |
| 65 | } |
| 66 | |
| 67 | void replay_event_net_run(void *opaque) |
| 68 | { |
| 69 | NetEvent *event = opaque; |
| 70 | struct iovec iov = { |
| 71 | .iov_base = (void *)event->data, |
| 72 | .iov_len = event->size |
| 73 | }; |
| 74 | |
| 75 | assert(event->id < network_filters_count); |
| 76 | |
| 77 | qemu_netfilter_pass_to_next(network_filters[event->id]->netdev, |
| 78 | event->flags, &iov, 1, network_filters[event->id]); |
| 79 | |
| 80 | g_free(event->data); |
| 81 | g_free(event); |
| 82 | } |
| 83 | |
| 84 | void replay_event_net_save(void *opaque) |
| 85 | { |
| 86 | NetEvent *event = opaque; |
| 87 | |
| 88 | replay_put_byte(event->id); |
| 89 | replay_put_dword(event->flags); |
| 90 | replay_put_array(event->data, event->size); |
| 91 | } |
| 92 | |
| 93 | void *replay_event_net_load(void) |
| 94 | { |
| 95 | NetEvent *event = g_new(NetEvent, 1); |
| 96 | |
| 97 | event->id = replay_get_byte(); |
| 98 | event->flags = replay_get_dword(); |
| 99 | replay_get_array_alloc(&event->data, &event->size); |
| 100 | |
| 101 | return event; |
| 102 | } |