mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-30 15:00:34 +00:00
705df5466c
Some NIC supports loopback mode and this is done by calling nc->info->receive() directly which in fact suppresses the effort of reentrancy check that is done in qemu_net_queue_send(). Unfortunately we can't use qemu_net_queue_send() here since for loopback there's no sender as peer, so this patch introduce a qemu_receive_packet() which is used for implementing loopback mode for a NIC with this check. NIC that supports loopback mode will be converted to this helper. This is intended to address CVE-2021-3416. Cc: Prasad J Pandit <ppandit@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang <jasowang@redhat.com>
84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
* Copyright (c) 2009 Red Hat, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef QEMU_NET_QUEUE_H
|
|
#define QEMU_NET_QUEUE_H
|
|
|
|
|
|
typedef struct NetPacket NetPacket;
|
|
typedef struct NetQueue NetQueue;
|
|
|
|
typedef void (NetPacketSent) (NetClientState *sender, ssize_t ret);
|
|
|
|
#define QEMU_NET_PACKET_FLAG_NONE 0
|
|
#define QEMU_NET_PACKET_FLAG_RAW (1<<0)
|
|
|
|
/* Returns:
|
|
* >0 - success
|
|
* 0 - queue packet for future redelivery
|
|
* <0 - failure (discard packet)
|
|
*/
|
|
typedef ssize_t (NetQueueDeliverFunc)(NetClientState *sender,
|
|
unsigned flags,
|
|
const struct iovec *iov,
|
|
int iovcnt,
|
|
void *opaque);
|
|
|
|
NetQueue *qemu_new_net_queue(NetQueueDeliverFunc *deliver, void *opaque);
|
|
|
|
void qemu_net_queue_append_iov(NetQueue *queue,
|
|
NetClientState *sender,
|
|
unsigned flags,
|
|
const struct iovec *iov,
|
|
int iovcnt,
|
|
NetPacketSent *sent_cb);
|
|
|
|
void qemu_del_net_queue(NetQueue *queue);
|
|
|
|
ssize_t qemu_net_queue_receive(NetQueue *queue,
|
|
const uint8_t *data,
|
|
size_t size);
|
|
|
|
ssize_t qemu_net_queue_receive_iov(NetQueue *queue,
|
|
const struct iovec *iov,
|
|
int iovcnt);
|
|
|
|
ssize_t qemu_net_queue_send(NetQueue *queue,
|
|
NetClientState *sender,
|
|
unsigned flags,
|
|
const uint8_t *data,
|
|
size_t size,
|
|
NetPacketSent *sent_cb);
|
|
|
|
ssize_t qemu_net_queue_send_iov(NetQueue *queue,
|
|
NetClientState *sender,
|
|
unsigned flags,
|
|
const struct iovec *iov,
|
|
int iovcnt,
|
|
NetPacketSent *sent_cb);
|
|
|
|
void qemu_net_queue_purge(NetQueue *queue, NetClientState *from);
|
|
bool qemu_net_queue_flush(NetQueue *queue);
|
|
|
|
#endif /* QEMU_NET_QUEUE_H */
|