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 "config-host.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 34 typedef struct VDEState { 35 NetClientState nc; 36 VDECONN *vde; 37 } VDEState; 38 39 static void vde_to_qemu(void *opaque) 40 { 41 VDEState *s = opaque; 42 uint8_t buf[4096]; 43 int size; 44 45 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0); 46 if (size > 0) { 47 qemu_send_packet(&s->nc, buf, size); 48 } 49 } 50 51 static ssize_t vde_receive(NetClientState *nc, const uint8_t *buf, size_t size) 52 { 53 VDEState *s = DO_UPCAST(VDEState, nc, nc); 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 63 static void vde_cleanup(NetClientState *nc) 64 { 65 VDEState *s = DO_UPCAST(VDEState, nc, nc); 66 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL); 67 vde_close(s->vde); 68 } 69 70 static NetClientInfo net_vde_info = { 71 .type = NET_CLIENT_OPTIONS_KIND_VDE, 72 .size = sizeof(VDEState), 73 .receive = vde_receive, 74 .cleanup = vde_cleanup, 75 }; 76 77 static int net_vde_init(NetClientState *peer, const char *model, 78 const char *name, const char *sock, 79 int port, const char *group, int mode) 80 { 81 NetClientState *nc; 82 VDEState *s; 83 VDECONN *vde; 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 93 vde = vde_open(init_sock, (char *)"QEMU", &args); 94 if (!vde){ 95 return -1; 96 } 97 98 nc = qemu_new_net_client(&net_vde_info, peer, model, name); 99 100 snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d", 101 sock, vde_datafd(vde)); 102 103 s = DO_UPCAST(VDEState, nc, nc); 104 105 s->vde = vde; 106 107 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s); 108 109 return 0; 110 } 111 112 int net_init_vde(const NetClientOptions *opts, const char *name, 113 NetClientState *peer) 114 { 115 const NetdevVdeOptions *vde; 116 117 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VDE); 118 vde = opts->vde; 119 120 /* missing optional values have been initialized to "all bits zero" */ 121 if (net_vde_init(peer, "vde", name, vde->sock, vde->port, vde->group, 122 vde->has_mode ? vde->mode : 0700) == -1) { 123 return -1; 124 } 125 126 return 0; 127 } 128