cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

vde.c (3695B)

      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 "qemu/osdep.h"
     25
     26#include <libvdeplug.h>
     27
     28#include "net/net.h"
     29#include "clients.h"
     30#include "qemu-common.h"
     31#include "qemu/option.h"
     32#include "qemu/main-loop.h"
     33#include "qapi/error.h"
     34
     35typedef struct VDEState {
     36    NetClientState nc;
     37    VDECONN *vde;
     38} VDEState;
     39
     40static void vde_to_qemu(void *opaque)
     41{
     42    VDEState *s = opaque;
     43    uint8_t buf[NET_BUFSIZE];
     44    int size;
     45
     46    size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
     47    if (size > 0) {
     48        qemu_send_packet(&s->nc, buf, size);
     49    }
     50}
     51
     52static ssize_t vde_receive(NetClientState *nc, const uint8_t *buf, size_t size)
     53{
     54    VDEState *s = DO_UPCAST(VDEState, nc, nc);
     55    ssize_t ret;
     56
     57    do {
     58      ret = vde_send(s->vde, (const char *)buf, size, 0);
     59    } while (ret < 0 && errno == EINTR);
     60
     61    return ret;
     62}
     63
     64static void vde_cleanup(NetClientState *nc)
     65{
     66    VDEState *s = DO_UPCAST(VDEState, nc, nc);
     67    qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
     68    vde_close(s->vde);
     69}
     70
     71static NetClientInfo net_vde_info = {
     72    .type = NET_CLIENT_DRIVER_VDE,
     73    .size = sizeof(VDEState),
     74    .receive = vde_receive,
     75    .cleanup = vde_cleanup,
     76};
     77
     78static int net_vde_init(NetClientState *peer, const char *model,
     79                        const char *name, const char *sock,
     80                        int port, const char *group, int mode, Error **errp)
     81{
     82    NetClientState *nc;
     83    VDEState *s;
     84    VDECONN *vde;
     85    char *init_group = (char *)group;
     86    char *init_sock = (char *)sock;
     87
     88    struct vde_open_args args = {
     89        .port = port,
     90        .group = init_group,
     91        .mode = mode,
     92    };
     93
     94    vde = vde_open(init_sock, (char *)"QEMU", &args);
     95    if (!vde){
     96        error_setg_errno(errp, errno, "Could not open vde");
     97        return -1;
     98    }
     99
    100    nc = qemu_new_net_client(&net_vde_info, peer, 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(const Netdev *netdev, const char *name,
    115                 NetClientState *peer, Error **errp)
    116{
    117    const NetdevVdeOptions *vde;
    118
    119    assert(netdev->type == NET_CLIENT_DRIVER_VDE);
    120    vde = &netdev->u.vde;
    121
    122    /* missing optional values have been initialized to "all bits zero" */
    123    if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group,
    124                     vde->has_mode ? vde->mode : 0700, errp) == -1) {
    125        return -1;
    126    }
    127
    128    return 0;
    129}