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 36 typedef struct VDEState { 37 VLANClientState nc; 38 VDECONN *vde; 39 } VDEState; 40 41 static 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 53 static 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 65 static 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 72 static NetClientInfo net_vde_info = { 73 .type = NET_CLIENT_TYPE_VDE, 74 .size = sizeof(VDEState), 75 .receive = vde_receive, 76 .cleanup = vde_cleanup, 77 }; 78 79 static 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 } 113 114 int 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 return 0; 131 } 132