qdev: remove baked in notion of aliases (v2)
[qemu.git] / 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
35 typedef struct VDEState {
36 VLANClientState nc;
37 VDECONN *vde;
38 } VDEState;
39
40 static void vde_to_qemu(void *opaque)
41 {
42 VDEState *s = opaque;
43 uint8_t buf[4096];
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
52 static ssize_t vde_receive(VLANClientState *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
64 static void vde_cleanup(VLANClientState *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
71 static NetClientInfo net_vde_info = {
72 .type = NET_CLIENT_TYPE_VDE,
73 .size = sizeof(VDEState),
74 .receive = vde_receive,
75 .cleanup = vde_cleanup,
76 };
77
78 static int net_vde_init(VLANState *vlan, const char *model,
79 const char *name, const char *sock,
80 int port, const char *group, int mode)
81 {
82 VLANClientState *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 return -1;
97 }
98
99 nc = qemu_new_net_client(&net_vde_info, vlan, NULL, model, name);
100
101 snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
102 sock, vde_datafd(vde));
103
104 s = DO_UPCAST(VDEState, nc, nc);
105
106 s->vde = vde;
107
108 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
109
110 return 0;
111 }
112
113 int net_init_vde(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
114 {
115 const char *sock;
116 const char *group;
117 int port, mode;
118
119 sock = qemu_opt_get(opts, "sock");
120 group = qemu_opt_get(opts, "group");
121
122 port = qemu_opt_get_number(opts, "port", 0);
123 mode = qemu_opt_get_number(opts, "mode", 0700);
124
125 if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
126 return -1;
127 }
128
129 return 0;
130 }