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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 */
2744d920 24#include "qemu/osdep.h"
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25
26#include <libvdeplug.h>
27
1422e32d 28#include "net/net.h"
a245fc18 29#include "clients.h"
1de7afc9 30#include "qemu/option.h"
3f124b68 31#include "qemu/main-loop.h"
7587855c 32#include "qapi/error.h"
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33
34typedef struct VDEState {
4e68f7a0 35 NetClientState nc;
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36 VDECONN *vde;
37} VDEState;
38
39static void vde_to_qemu(void *opaque)
40{
41 VDEState *s = opaque;
d32fcad3 42 uint8_t buf[NET_BUFSIZE];
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43 int size;
44
45 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
46 if (size > 0) {
b4e859c6 47 qemu_send_packet(&s->nc, buf, size);
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48 }
49}
50
4e68f7a0 51static ssize_t vde_receive(NetClientState *nc, const uint8_t *buf, size_t size)
5c361cc3 52{
b4e859c6 53 VDEState *s = DO_UPCAST(VDEState, nc, nc);
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54 ssize_t ret;
55
56 do {
57 ret = vde_send(s->vde, (const char *)buf, size, 0);
58 } while (ret < 0 && errno == EINTR);
59
60 return ret;
61}
62
4e68f7a0 63static void vde_cleanup(NetClientState *nc)
5c361cc3 64{
b4e859c6 65 VDEState *s = DO_UPCAST(VDEState, nc, nc);
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66 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
67 vde_close(s->vde);
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68}
69
b4e859c6 70static NetClientInfo net_vde_info = {
f394b2e2 71 .type = NET_CLIENT_DRIVER_VDE,
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72 .size = sizeof(VDEState),
73 .receive = vde_receive,
74 .cleanup = vde_cleanup,
75};
76
4e68f7a0 77static int net_vde_init(NetClientState *peer, const char *model,
5c361cc3 78 const char *name, const char *sock,
7587855c 79 int port, const char *group, int mode, Error **errp)
5c361cc3 80{
4e68f7a0 81 NetClientState *nc;
5c361cc3 82 VDEState *s;
b4e859c6 83 VDECONN *vde;
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84 char *init_group = (char *)group;
85 char *init_sock = (char *)sock;
86
87 struct vde_open_args args = {
88 .port = port,
89 .group = init_group,
90 .mode = mode,
91 };
92
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93 vde = vde_open(init_sock, (char *)"QEMU", &args);
94 if (!vde){
7587855c 95 error_setg_errno(errp, errno, "Could not open vde");
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96 return -1;
97 }
b4e859c6 98
ab5f3f84 99 nc = qemu_new_net_client(&net_vde_info, peer, model, name);
b4e859c6 100
53b85d95 101 qemu_set_info_str(nc, "sock=%s,fd=%d", sock, vde_datafd(vde));
d89b4f83 102
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103 s = DO_UPCAST(VDEState, nc, nc);
104
105 s->vde = vde;
106
5c361cc3 107 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
b4e859c6 108
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109 return 0;
110}
111
cebea510 112int net_init_vde(const Netdev *netdev, const char *name,
a30ecde6 113 NetClientState *peer, Error **errp)
5c361cc3 114{
4a917c39 115 const NetdevVdeOptions *vde;
5c361cc3 116
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117 assert(netdev->type == NET_CLIENT_DRIVER_VDE);
118 vde = &netdev->u.vde;
5c361cc3 119
4a917c39 120 /* missing optional values have been initialized to "all bits zero" */
d33d93b2 121 if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group,
7587855c 122 vde->has_mode ? vde->mode : 0700, errp) == -1) {
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123 return -1;
124 }
125
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126 return 0;
127}