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-net.h" 13 #include "qom/object.h" 14 #include "net/queue.h" 15 16 #define TYPE_NETFILTER "netfilter" 17 #define NETFILTER(obj) \ 18 OBJECT_CHECK(NetFilterState, (obj), TYPE_NETFILTER) 19 #define NETFILTER_GET_CLASS(obj) \ 20 OBJECT_GET_CLASS(NetFilterClass, (obj), TYPE_NETFILTER) 21 #define NETFILTER_CLASS(klass) \ 22 OBJECT_CLASS_CHECK(NetFilterClass, (klass), TYPE_NETFILTER) 23 24 typedef void (FilterSetup) (NetFilterState *nf, Error **errp); 25 typedef void (FilterCleanup) (NetFilterState *nf); 26 /* 27 * Return: 28 * 0: finished handling the packet, we should continue 29 * size: filter stolen this packet, we stop pass this packet further 30 */ 31 typedef ssize_t (FilterReceiveIOV)(NetFilterState *nc, 32 NetClientState *sender, 33 unsigned flags, 34 const struct iovec *iov, 35 int iovcnt, 36 NetPacketSent *sent_cb); 37 38 typedef void (FilterStatusChanged) (NetFilterState *nf, Error **errp); 39 40 typedef void (FilterHandleEvent) (NetFilterState *nf, int event, Error **errp); 41 42 typedef struct NetFilterClass { 43 ObjectClass parent_class; 44 45 /* optional */ 46 FilterSetup *setup; 47 FilterCleanup *cleanup; 48 FilterStatusChanged *status_changed; 49 FilterHandleEvent *handle_event; 50 /* mandatory */ 51 FilterReceiveIOV *receive_iov; 52 } NetFilterClass; 53 54 55 struct NetFilterState { 56 /* private */ 57 Object parent; 58 59 /* protected */ 60 char *netdev_id; 61 NetClientState *netdev; 62 NetFilterDirection direction; 63 bool on; 64 QTAILQ_ENTRY(NetFilterState) next; 65 }; 66 67 ssize_t qemu_netfilter_receive(NetFilterState *nf, 68 NetFilterDirection direction, 69 NetClientState *sender, 70 unsigned flags, 71 const struct iovec *iov, 72 int iovcnt, 73 NetPacketSent *sent_cb); 74 75 /* pass the packet to the next filter */ 76 ssize_t qemu_netfilter_pass_to_next(NetClientState *sender, 77 unsigned flags, 78 const struct iovec *iov, 79 int iovcnt, 80 void *opaque); 81 82 void colo_notify_filters_event(int event, Error **errp); 83 84 #endif /* QEMU_NET_FILTER_H */ 85