LXR qemu/net/vde.c

   1/*
   2 * QEMU System Emulator
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24#include "net/vde.h"
  25
  26#include "config-host.h"
  27
  28#include <libvdeplug.h>
  29
  30#include "net.h"
  31#include "qemu-char.h"
  32#include "qemu-common.h"
  33#include "qemu-option.h"
  34#include "sysemu.h"
  35
  36typedef struct VDEState {
  37    VLANClientState nc;
  38    VDECONN *vde;
  39} VDEState;
  40
  41static void vde_to_qemu(void *opaque)
  42{
  43    VDEState *s = opaque;
  44    uint8_t buf[4096];
  45    int size;
  46
  47    size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
  48    if (size > 0) {
  49        qemu_send_packet(&s->nc, buf, size);
  50    }
  51}
  52
  53static ssize_t vde_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
  54{
  55    VDEState *s = DO_UPCAST(VDEState, nc, nc);
  56    ssize_t ret;
  57
  58    do {
  59      ret = vde_send(s->vde, (const char *)buf, size, 0);
  60    } while (ret < 0 && errno == EINTR);
  61
  62    return ret;
  63}
  64
  65static void vde_cleanup(VLANClientState *nc)
  66{
  67    VDEState *s = DO_UPCAST(VDEState, nc, nc);
  68    qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
  69    vde_close(s->vde);
  70}
  71
  72static NetClientInfo net_vde_info = {
  73    .type = NET_CLIENT_TYPE_VDE,
  74    .size = sizeof(VDEState),
  75    .receive = vde_receive,
  76    .cleanup = vde_cleanup,
  77};
  78
  79static int net_vde_init(VLANState *vlan, const char *model,
  80                        const char *name, const char *sock,
  81                        int port, const char *group, int mode)
  82{
  83    VLANClientState *nc;
  84    VDEState *s;
  85    VDECONN *vde;
  86    char *init_group = (char *)group;
  87    char *init_sock = (char *)sock;
  88
  89    struct vde_open_args args = {
  90        .port = port,
  91        .group = init_group,
  92        .mode = mode,
  93    };
  94
  95    vde = vde_open(init_sock, (char *)"QEMU", &args);
  96    if (!vde){
  97        return -1;
  98    }
  99
 100    nc = qemu_new_net_client(&net_vde_info, vlan, NULL, model, name);
 101
 102    snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
 103             sock, vde_datafd(vde));
 104
 105    s = DO_UPCAST(VDEState, nc, nc);
 106
 107    s->vde = vde;
 108
 109    qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
 110
 111    return 0;
 112}
 113
 114int net_init_vde(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
 115{
 116    const char *sock;
 117    const char *group;
 118    int port, mode;
 119
 120    sock  = qemu_opt_get(opts, "sock");
 121    group = qemu_opt_get(opts, "group");
 122
 123    port = qemu_opt_get_number(opts, "port", 0);
 124    mode = qemu_opt_get_number(opts, "mode", 0700);
 125
 126    if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
 127        return -1;
 128    }
 129
 130    if (vlan) {
 131        vlan->nb_host_devs++;
 132    }
 133
 134    return 0;
 135}
 136