LXR qemu/include/net/queue.h

   1/*
   2 * Copyright (c) 2003-2008 Fabrice Bellard
   3 * Copyright (c) 2009 Red Hat, Inc.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining a copy
   6 * of this software and associated documentation files (the "Software"), to deal
   7 * in the Software without restriction, including without limitation the rights
   8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 * copies of the Software, and to permit persons to whom the Software is
  10 * furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice shall be included in
  13 * all copies or substantial portions of the Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21 * THE SOFTWARE.
  22 */
  23
  24#ifndef QEMU_NET_QUEUE_H
  25#define QEMU_NET_QUEUE_H
  26
  27
  28typedef struct NetPacket NetPacket;
  29typedef struct NetQueue NetQueue;
  30
  31typedef void (NetPacketSent) (NetClientState *sender, ssize_t ret);
  32
  33#define QEMU_NET_PACKET_FLAG_NONE  0
  34#define QEMU_NET_PACKET_FLAG_RAW  (1<<0)
  35
  36/* Returns:
  37 *   >0 - success
  38 *    0 - queue packet for future redelivery
  39 *   <0 - failure (discard packet)
  40 */
  41typedef ssize_t (NetQueueDeliverFunc)(NetClientState *sender,
  42                                      unsigned flags,
  43                                      const struct iovec *iov,
  44                                      int iovcnt,
  45                                      void *opaque);
  46
  47NetQueue *qemu_new_net_queue(NetQueueDeliverFunc *deliver, void *opaque);
  48
  49void qemu_net_queue_append_iov(NetQueue *queue,
  50                               NetClientState *sender,
  51                               unsigned flags,
  52                               const struct iovec *iov,
  53                               int iovcnt,
  54                               NetPacketSent *sent_cb);
  55
  56void qemu_del_net_queue(NetQueue *queue);
  57
  58ssize_t qemu_net_queue_receive(NetQueue *queue,
  59                               const uint8_t *data,
  60                               size_t size);
  61
  62ssize_t qemu_net_queue_send(NetQueue *queue,
  63                            NetClientState *sender,
  64                            unsigned flags,
  65                            const uint8_t *data,
  66                            size_t size,
  67                            NetPacketSent *sent_cb);
  68
  69ssize_t qemu_net_queue_send_iov(NetQueue *queue,
  70                                NetClientState *sender,
  71                                unsigned flags,
  72                                const struct iovec *iov,
  73                                int iovcnt,
  74                                NetPacketSent *sent_cb);
  75
  76void qemu_net_queue_purge(NetQueue *queue, NetClientState *from);
  77bool qemu_net_queue_flush(NetQueue *queue);
  78
  79#endif /* QEMU_NET_QUEUE_H */
  80