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 35 typedef struct VDEState { 36 NetClientState nc; 37 VDECONN *vde; 38 } VDEState; 39 40 static 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 52 static 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 64 static 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 71 static NetClientInfo net_vde_info = { 72 .type = NET_CLIENT_DRIVER_VDE, 73 .size = sizeof(VDEState), 74 .receive = vde_receive, 75 .cleanup = vde_cleanup, 76 }; 77 78 static 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 } 113 114 int 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 } 130