Archipelago » qemu

/*

 * QEMU System Emulator

 *

 * Copyright (c) 2003-2008 Fabrice Bellard

 *

 * 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.

 */

#include "net/vde.h"

#include "config-host.h"

#include <libvdeplug.h>

#include "net.h"

#include "qemu-char.h"

#include "qemu-common.h"

#include "qemu-option.h"

#include "sysemu.h"

typedef struct VDEState {

    VLANClientState *vc;

    VDECONN *vde;

} VDEState;

static void vde_to_qemu(void *opaque)

{

    VDEState *s = opaque;

    uint8_t buf[4096];

    int size;

    size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);

    if (size > 0) {

        qemu_send_packet(s->vc, buf, size);

    }

}

static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)

{

    VDEState *s = vc->opaque;

    ssize_t ret;

    do {

      ret = vde_send(s->vde, (const char *)buf, size, 0);

    } while (ret < 0 && errno == EINTR);

    return ret;

}

static void vde_cleanup(VLANClientState *vc)

{

    VDEState *s = vc->opaque;

    qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);

    vde_close(s->vde);

    qemu_free(s);

}

static int net_vde_init(VLANState *vlan, const char *model,

                        const char *name, const char *sock,

                        int port, const char *group, int mode)

{

    VDEState *s;

    char *init_group = (char *)group;

    char *init_sock = (char *)sock;

    struct vde_open_args args = {

        .port = port,

        .group = init_group,

        .mode = mode,

    };

    s = qemu_mallocz(sizeof(VDEState));

    s->vde = vde_open(init_sock, (char *)"QEMU", &args);

    if (!s->vde){

        free(s);

        return -1;

    }

    s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_VDE,

                                 vlan, NULL, model, name, NULL,

                                 vde_receive, NULL, NULL,

                                 vde_cleanup, s);

    qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);

    snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",

             sock, vde_datafd(s->vde));

    return 0;

}

int net_init_vde(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)

{

    const char *sock;

    const char *group;

    int port, mode;

    sock  = qemu_opt_get(opts, "sock");

    group = qemu_opt_get(opts, "group");

    port = qemu_opt_get_number(opts, "port", 0);

    mode = qemu_opt_get_number(opts, "mode", 0700);

    if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {

        return -1;

    }

    if (vlan) {

        vlan->nb_host_devs++;

    }

    return 0;

}