| 1 | /* |
| 2 | * Copyright (c) 2015 FUJITSU LIMITED |
| 3 | * Author: Yang Hongyang <yanghy@cn.fujitsu.com> |
| 4 | * |
| 5 | * This work is licensed under the terms of the GNU GPL, version 2 or |
| 6 | * later. See the COPYING file in the top-level directory. |
| 7 | */ |
| 8 | |
| 9 | #ifndef QEMU_NET_FILTER_H |
| 10 | #define QEMU_NET_FILTER_H |
| 11 | |
| 12 | #include "qapi/qapi-types-common.h" |
| 13 | #include "qemu/queue.h" |
| 14 | #include "qom/object.h" |
| 15 | #include "net/queue.h" |
| 16 | |
| 17 | #define TYPE_NETFILTER "netfilter" |
| 18 | OBJECT_DECLARE_TYPE(NetFilterState, NetFilterClass, NETFILTER) |
| 19 | |
| 20 | typedef void (FilterSetup) (NetFilterState *nf, Error **errp); |
| 21 | typedef void (FilterCleanup) (NetFilterState *nf); |
| 22 | /* |
| 23 | * Return: |
| 24 | * 0: finished handling the packet, we should continue |
| 25 | * size: filter stolen this packet, we stop pass this packet further |
| 26 | */ |
| 27 | typedef ssize_t (FilterReceiveIOV)(NetFilterState *nc, |
| 28 | NetClientState *sender, |
| 29 | unsigned flags, |
| 30 | const struct iovec *iov, |
| 31 | int iovcnt, |
| 32 | NetPacketSent *sent_cb); |
| 33 | |
| 34 | typedef void (FilterStatusChanged) (NetFilterState *nf, Error **errp); |
| 35 | |
| 36 | typedef void (FilterHandleEvent) (NetFilterState *nf, int event, Error **errp); |
| 37 | |
| 38 | struct NetFilterClass { |
| 39 | ObjectClass parent_class; |
| 40 | |
| 41 | /* optional */ |
| 42 | FilterSetup *setup; |
| 43 | FilterCleanup *cleanup; |
| 44 | FilterStatusChanged *status_changed; |
| 45 | FilterHandleEvent *handle_event; |
| 46 | /* mandatory */ |
| 47 | FilterReceiveIOV *receive_iov; |
| 48 | }; |
| 49 | |
| 50 | |
| 51 | struct NetFilterState { |
| 52 | /* private */ |
| 53 | Object parent; |
| 54 | |
| 55 | /* protected */ |
| 56 | char *netdev_id; |
| 57 | NetClientState *netdev; |
| 58 | NetFilterDirection direction; |
| 59 | bool on; |
| 60 | char *position; |
| 61 | bool insert_before_flag; |
| 62 | QTAILQ_ENTRY(NetFilterState) next; |
| 63 | }; |
| 64 | |
| 65 | ssize_t qemu_netfilter_receive(NetFilterState *nf, |
| 66 | NetFilterDirection direction, |
| 67 | NetClientState *sender, |
| 68 | unsigned flags, |
| 69 | const struct iovec *iov, |
| 70 | int iovcnt, |
| 71 | NetPacketSent *sent_cb); |
| 72 | |
| 73 | /* pass the packet to the next filter */ |
| 74 | ssize_t qemu_netfilter_pass_to_next(NetClientState *sender, |
| 75 | unsigned flags, |
| 76 | const struct iovec *iov, |
| 77 | int iovcnt, |
| 78 | void *opaque); |
| 79 | |
| 80 | void colo_notify_filters_event(int event, Error **errp); |
| 81 | |
| 82 | #endif /* QEMU_NET_FILTER_H */ |