net/tap.h

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2009 Red Hat, Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #ifndef QEMU_NET_TAP_H
  27 #define QEMU_NET_TAP_H
  28
  29 #include "qemu-common.h"
  30 #include "qapi-types.h"
  31
  32 #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
  33 #define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
  34
  35 int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required);
  36
  37 ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen);
  38
  39 int tap_has_ufo(NetClientState *nc);
  40 int tap_has_vnet_hdr(NetClientState *nc);
  41 int tap_has_vnet_hdr_len(NetClientState *nc, int len);
  42 void tap_using_vnet_hdr(NetClientState *nc, int using_vnet_hdr);
  43 void tap_set_offload(NetClientState *nc, int csum, int tso4, int tso6, int ecn, int ufo);
  44 void tap_set_vnet_hdr_len(NetClientState *nc, int len);
  45
  46 int tap_set_sndbuf(int fd, const NetdevTapOptions *tap);
  47 int tap_probe_vnet_hdr(int fd);
  48 int tap_probe_vnet_hdr_len(int fd, int len);
  49 int tap_probe_has_ufo(int fd);
  50 void tap_fd_set_offload(int fd, int csum, int tso4, int tso6, int ecn, int ufo);
  51 void tap_fd_set_vnet_hdr_len(int fd, int len);
  52
  53 int tap_get_fd(NetClientState *nc);
  54
  55 struct vhost_net;
  56 struct vhost_net *tap_get_vhost_net(NetClientState *nc);
  57
  58 #endif /* QEMU_NET_TAP_H */